Dust suppression type crushing sand making machine and working method

Abstract

The invention relates to the field of crushing and sand making machines, and discloses a dust suppression type crushing and sand making machine and a working method. A crushing bin one and a crushing bin two are arranged in the crushing and sand making machine. The crushing bin two is connected to the lower end of the crushing bin one, and a dropping channel for discharging sand and gravel is arranged at the lower end of the crushing bin two. A pressure mechanism is arranged in the crushing bin one, and two crushing rollers are symmetrically arranged in the crushing bin two. The lifting and rotating movement of the pressure mechanism can effectively perform preliminary crushing and fixing of stones, and prevent the stones from bouncing upwards or continuously rolling on the surface of the crushing rollers during the crushing process, thereby improving the crushing efficiency. Secondly, through the preliminary crushing by the pressure mechanism, the stones are more likely to meet the crushing requirements between the two crushing rollers, making the subsequent crushing work smoother. In addition, due to the existence of the pressure mechanism, the splashing of stones and the generation of dust during the crushing process are reduced, which is beneficial to improving the surrounding air environment and reducing the impact on the health of the staff.

Description

Technical Field

[0001] The invention relates to the field of crushing sand making machines, and in particular to a dust suppression type crushing sand making machine and a working method thereof. Background Art

[0002] Sand making machine, also known as machine-made sand shaping machine or stone shaping machine, is a high-performance sand making equipment. It is mainly used in the production line of concrete and sand and gravel for construction, roads, bridges and other projects. It can also be used in the fine crushing and screening processes in the mineral processing industry. Through crushing and shaping, it can make various large stones into standard building sand and gravel. The working principle of sand making and shaping machine is based on the technology of high-efficiency vertical shaft impact crusher, and realizes crushing and shaping by changing the feeding method and core structure of the crushing chamber. Specifically, the material is first introduced into the crushing device by the feeding device. In the crushing device, the material is impacted by the high-speed rotating impact hammer or impeller, as well as the friction and grinding with the surrounding materials, so that it is broken into small particles. Subsequently, it is screened by the screening device, and the small-sized sand that meets the requirements is output;

[0003] The sand making machine in the prior art generally performs crushing work directly through two crushing rollers, and the crushing efficiency of this type of crushing is not high when crushing stones, because there is no additional fixing structure for the stones, which makes it easy for the stones to bounce upwards or continue to roll on the surface of the crushing roller when crushed, and cannot effectively enter between the two crushing rollers to complete the crushing work. In addition, the dust generated during the crushing process is too large, which easily affects the surrounding air environment. Summary of the invention

[0004] The present invention provides a dust suppression type crushing sand making machine and a working method thereof, which overcome the deficiencies described in the background technology.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A dust suppression type crushing and sand making machine, wherein a crushing chamber 1 and a crushing chamber 2 are arranged in the crushing and sand making machine, the crushing chamber 2 is connected to the lower end of the crushing chamber 1, a drop channel for discharging sand and gravel is arranged at the lower end of the crushing chamber 2, a pressure mechanism is arranged in the crushing chamber 1, and two crushing rollers are symmetrically arranged in the crushing chamber 2, the two crushing rollers are respectively arranged on the left and right sides of the lower end of the pressure mechanism, and the two crushing rollers both rotate in the direction of the pressure mechanism;

[0007] The pressure mechanism includes an extrusion body, an extrusion roller, and a driving wheel for driving the extrusion roller to rotate. The extrusion roller is rotatably mounted at the lower end of the extrusion body, and the driving wheel is arranged on the side of the extrusion body. The extrusion roller includes a crushing wheel and a driven wheel. The crushing wheels are arranged equidistantly, the crushing wheel and the driven wheel are coaxially arranged, and the driven wheel passes through all the crushing wheels. The driving wheel forms a belt drive with the driven wheel through a transmission belt.

[0008] A threaded pipe fitting and a hollow tube are provided on the side of the extrusion body, a rod body is arranged at a position corresponding to the hollow tube in the crushing bin, a motor is arranged at a position corresponding to the threaded pipe fitting in the crushing bin, the rod body passes through the hollow tube, the output shaft of the motor passes through the threaded pipe fitting, and forms a threaded connection with the threaded pipe fitting, so as to drive the pressure mechanism to rise and fall by rotating the output shaft of the motor.

[0009] A preferred technical solution, two dust reduction components are symmetrically arranged on the upper side of the inner end of the crushing bin, the dust reduction components include an outer shell, a boosting pipe 1, a boosting pipe 2 and a connecting pipe body, the boosting pipe 1 and the boosting pipe 2 are connected through the connecting pipe body, the connecting pipe bodies are arranged in an equidistant array, rollers are arranged at both ends of the boosting pipe 1 and the boosting pipe 2, slide rails 1 are arranged on both sides of the inner end of the outer shell, all rollers are installed in the corresponding slide rails 1, and the side of the boosting pipe 1 away from the boosting pipe 2 is connected to the output shaft of a telescopic driving cylinder, so that the boosting pipe 1 and the boosting pipe 2 are driven to slide along the direction of the slide rail 1 by the telescopic driving cylinder;

[0010] The boosting tube 1 is provided with a boosting monomer 1, and the inner ends of the boosting monomer 1 and the boosting monomer 2 are both expanded cavities. The boosting tube 2 is provided with a boosting monomer 2 corresponding to the boosting monomer 1. The boosting monomer 1 is connected to the water pump for water supply through a water supply pipe, and the boosting monomer 2 is connected to the air compressor for pressurization through a boosting air pipe. The expanded cavities in the boosting monomer 1 and the boosting monomer 2 are both arranged toward the water supply pipe, and the expanded cavities in the boosting monomer 1 and the boosting monomer 2 are connected through a connecting pipe body;

[0011] The expanded cavity in the second booster unit is provided with voltage stabilizing plates in an equidistant array, and the voltage stabilizing plates are arranged close to the connecting pipe body.

[0012] A preferred technical solution is that two secondary crushing assemblies for squeezing sand and gravel are symmetrically arranged in the falling channel, the two secondary crushing assemblies both protrude from the surface of the falling channel, and the squeezing directions of the two secondary crushing assemblies are opposite to each other, the secondary crushing assembly includes a transmission crushing component and an electric push rod, and the transmission crushing component is installed on the output shaft of the electric push rod through a fixing member;

[0013] The transmission crushing component includes a metal transmission belt and two symmetrically arranged driving wheels, one of which is driven to rotate by a transmission motor, a metal transmission belt is used between the two driving wheels to form a belt transmission, and a support frame is used between the two driving wheels to form a support, an embedded block is provided on the side of the support frame, and two slide rails corresponding to the embedded block are provided in the falling channel, and the embedded block is embedded in the slide rails. A fixing plate is provided on the surface of the support frame close to the embedded block, and the fixing plate is connected to the output shaft of the electric push rod.

[0014] A preferred technical solution is that the surface of the metal transmission belt has multiple convex strips in an equidistant array, and the convex strips are arranged at an angle. When the two electric push rods drive the transmission crushing components connected to them to move in opposite directions, the convex strips on the surfaces of the two metal transmission belts will squeeze the gravel in contact with them in opposite directions.

[0015] A working method of a dust suppression type crushing and sand making machine, during operation, two crushing rollers need to be started first, and then a pressure mechanism is raised upward, and stones to be crushed are put into a crushing bin one, so that the stones roll to the middle of the crushing bin one, and then the stones are crushed by the two crushing rollers, and then the pressure mechanism is moved downward during the crushing process, and the crushing wheel in the pressure mechanism is used to squeeze the stones to prevent the stones from bouncing up when being squeezed by the two crushing rollers, and two metal transmission belts protruding from the surface of the falling channel are used to squeeze and crush the crushed stones falling between the two metal transmission belts under the support of the driving wheel two, and during the crushing, two electric push rods are used to drive the corresponding transmission crushing components to move respectively, so that the two transmission crushing components move in an intermittent manner, and the contact surface between the two metal transmission belts and the crushed stones is changed, so that the crushed stones are crushed for the second time;

[0016] When the stones are crushed, pressurized water mist is sprayed outward through the booster unit 2 in the dust reduction component, and the dust in the air is absorbed by the water mist to achieve the dust reduction effect.

[0017] Compared with the prior art, this technical solution has the following advantages:

[0018] The design of the dust suppression type crushing and sand making machine and its pressure mechanism proposed in the present invention brings remarkable beneficial effects. Firstly, the lifting and rotating movements of the pressure mechanism can effectively carry out preliminary crushing and fixing of stones, preventing stones from bouncing upward or continuously rolling on the surface of the crushing roller during the crushing process, thereby improving the crushing efficiency. Secondly, through the preliminary crushing of the pressure mechanism, the stones can more easily meet the crushing requirements between the two crushing rollers, making the subsequent crushing work smoother. In addition, due to the presence of the pressure mechanism, the splashing of stones and the generation of dust during the crushing process are reduced, which is beneficial to improving the surrounding air environment and reducing the impact on the health of workers. In summary, the design of the dust suppression type crushing and sand making machine and its pressure mechanism proposed in the present invention shows remarkable advantages in improving crushing efficiency and improving the working environment.

[0019] When the water flows through the booster monomer one, its flared cavity design allows the water flow to be initially pressurized, and then the water flows into the connecting pipe body and further flows into the flared cavity of the booster monomer two. In the booster monomer two, the water flows and the pressurized gas from the air compressor are mixed to form high-pressure water mist; during the flow of the water, after the initial pressurization of the booster monomer one, the water flow speed increases and the pressure increases. When the water flows into the booster monomer two, after mixing with the pressurized gas, the water flow is further refined into tiny water droplets to form water mist. Since there are equidistant arrays of pressure stabilizing plates in the flared cavity of the booster monomer two, these pressure stabilizing plates not only help to stabilize the water flow and pressure, but also make the water mist more uniform and delicate. When the high-pressure water mist is sprayed into the crushing bin one, it can effectively combine with the dust generated in the crushing process to settle the dust particles, thereby reducing the dust concentration in the air and improving the working environment. In addition, the high-pressure water mist can also cool the stones and crushing rollers in the crushing process to reduce equipment wear and failure caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 This is an overall diagram of the present invention.

[0022] Figure 2 Schematic diagram of the pressure mechanism.

[0023] Figure 3 for Figure 2 Schematic diagram from another perspective.

[0024] Figure 4 Schematic diagram of the secondary crushing assembly.

[0025] Figure 5 It is a schematic diagram of the transmission crushing component.

[0026] Figure 6 Schematic diagram of a metal transmission belt.

[0027] Figure 7 It is a schematic diagram of the structure of the dust reduction component.

[0028] Figure 8 It is a schematic diagram of the structure of boost pipe 1 and boost pipe 2.

[0029] In the figure: crushing bin 1, rod body 11, motor 12, dust suppression assembly 13, outer shell 131, slide rail 1311, roller 132, booster pipe 133, booster unit 1331, water supply pipe 3311, booster pipe 2 134, booster unit 2 1341, voltage stabilizing sheet 3411, booster air pipe 3412, connecting pipe body 135, telescopic drive cylinder 136;

[0030] Crushing bin 2, drop channel 21, slide rail 22;

[0031] Pressure mechanism 3, extrusion body 31, threaded pipe fitting 311, hollow pipe 312, driving wheel 1 32, extrusion roller 33, crushing wheel 331, driven wheel 332, transmission belt 34;

[0032] Crushing roller 4;

[0033] Secondary crushing assembly 5, transmission crushing member 51, metal transmission belt 511, second driving wheel 512, transmission motor 513, support frame 514, insert block 515, fixing plate 516, electric push rod 52. DETAILED DESCRIPTION

[0034] like Figures 1 to 8 As shown, the present invention proposes a dust suppression type crushing and sand making machine, wherein a crushing bin 1 and a crushing bin 2 are provided in the crushing and sand making machine, the crushing bin 2 2 is connected to the lower end of the crushing bin 1, and a dropping channel 21 for discharging sand and gravel is provided at the lower end of the crushing bin 2 2, a pressure mechanism 3 is provided in the crushing bin 1, and two crushing rollers 4 are symmetrically provided in the crushing bin 2, and the two crushing rollers 4 are respectively provided on the left and right sides of the lower end of the pressure mechanism 3, and the two crushing rollers 4 both rotate toward the direction of the pressure mechanism 3;

[0035] The pressure mechanism 3 includes an extrusion body 31, an extrusion roller 33, and a driving wheel 32 for driving the extrusion roller 33 to rotate. The extrusion roller 33 is rotatably mounted on the lower end of the extrusion body 31, and the driving wheel 32 is arranged on the side of the extrusion body 31. The extrusion roller 33 includes a crushing wheel 331 and a driven wheel 332. The crushing wheels 331 are arranged equidistantly, and the crushing wheels 331 and the driven wheels 332 are coaxially arranged, and the driven wheels 332 pass through all the crushing wheels 331. The driving wheel 32 forms a belt drive with the driven wheels 332 through a transmission belt 34.

[0036] The side of the extrusion body 31 is provided with a threaded pipe 311 and a hollow tube 312, a rod body 11 is arranged at a position corresponding to the hollow tube 312 in the crushing bin 1, a motor 12 is arranged at a position corresponding to the threaded pipe 311 in the crushing bin 1, the rod body 11 passes through the hollow tube 312, the output shaft of the motor 12 passes through the threaded pipe 311, and forms a threaded connection with the threaded pipe 311, so as to drive the pressure mechanism 3 to rise and fall by rotating the output shaft of the motor 12;

[0037] Compared with the existing sand making machines mentioned in the background technology, the dust suppression type crushing sand making machine and the design of the pressure mechanism 3 thereof proposed in the present invention bring significant beneficial effects. First, the lifting and rotating movements of the pressure mechanism 3 can effectively perform preliminary crushing and fixing of stones, preventing the stones from bouncing upward or continuously rolling on the surface of the crushing roller during the crushing process, thereby improving the crushing efficiency. Secondly, through the preliminary crushing of the pressure mechanism 3, the stones can more easily meet the crushing requirements between the two crushing rollers 4, making the subsequent crushing work smoother. In addition, due to the presence of the pressure mechanism 3, the splashing of stones and the generation of dust during the crushing process are reduced, which is beneficial to improving the surrounding air environment and reducing the impact on the health of workers. In summary, the design of the dust suppression type crushing sand making machine and the pressure mechanism 3 thereof proposed in the present invention shows significant advantages in improving crushing efficiency and improving the working environment.

[0038] Furthermore, two dust reduction components 13 are symmetrically arranged on the upper side of the inner end of the crushing bin 1, and the dust reduction components 13 include an outer shell 131, a boost pipe 1 133, a boost pipe 2 134 and a connecting pipe body 135. The boost pipe 1 133 and the boost pipe 2 134 are connected through the connecting pipe body 135, and the connecting pipe bodies 135 are arranged in an equidistant array. Rollers 132 are arranged at both ends of the boost pipe 1 133 and the boost pipe 2 134. Slide rails 1311 are arranged on both sides of the inner end of the outer shell 131, and all rollers 132 are installed in the corresponding slide rails 1311. The side of the boost pipe 1 133 away from the boost pipe 2 134 is connected to the output shaft of a telescopic driving cylinder 136, so as to drive the boost pipe 1 133 and the boost pipe 2 134 to slide along the direction of the slide rail 1 1311 through the telescopic driving cylinder 136;

[0039] The boost tube 133 is provided with a boost unit 1331, and the inner ends of the boost unit 1331 and the boost unit 2 1341 are both expanded cavities. The boost tube 2 134 is provided with a boost unit 1341 corresponding to the boost unit 1331. The boost unit 1331 is connected to the water pump for water supply through a water supply pipe 3311, and the boost unit 2 1341 is connected to the air compressor for pressurization through a boost air pipe 3412. The expanded cavities in the boost unit 1331 and the boost unit 2 1341 are both arranged toward the water supply pipe 3311, and the expanded cavities in the boost unit 1331 and the boost unit 2 1341 are connected through the connecting pipe body 135.

[0040] The expanded cavity in the second booster unit 1341 has equidistant arrays of voltage stabilizing sheets 3411, which are arranged close to the connecting pipe body 135;

[0041] In the dust suppression type crushing sand making machine, the design of the boosting monomer 1 1331 and the boosting monomer 2 1341 is an important innovation point corresponding to the dust problem mentioned in the background technology. In the background technology, the dust generated by the traditional sand making machine during the crushing process is too large, which is easy to affect the surrounding air environment. The present invention effectively solves this problem by adding a dust suppression component 13, especially the ingenious design of the boosting monomer 1 1331 and the boosting monomer 2 1341;

[0042] The booster unit 1331 is connected to the water pump for water supply through the water supply pipe 3311, and the booster unit 2 1341 is connected to the air compressor for pressurization through the booster air pipe 3412. When the water flows through the booster unit 1331, its expanded cavity design allows the water flow to be initially pressurized, and then the water flows into the connecting pipe body 135, and further flows into the expanded cavity of the booster unit 2 1341. In the booster unit 2 1341, the water flows and the pressurized gas from the air compressor are mixed to form high-pressure water mist. During the flow of water, after the initial pressurization of the booster unit 1331, the water flow speed increases, the pressure increases, and when the water flows into ... When the monomer 1341 is used, after mixing with the pressurized gas, the water flow is further refined into tiny water droplets to form water mist. Since there are equidistant arrays of pressure stabilizing sheets 3411 in the expanded cavity in the pressurized monomer 1341, these pressure stabilizing sheets not only help to stabilize the water flow and pressure, but also make the water mist more uniform and delicate. When the high-pressure water mist is sprayed into the crushing bin 1, it can effectively combine with the dust generated during the crushing process to settle the dust particles, thereby reducing the dust concentration in the air and improving the working environment. In addition, the high-pressure water mist can also cool the stones and crushing rollers during the crushing process, reducing equipment wear and failure caused by high temperature.

[0043] In summary, the design of booster unit 1331 and booster unit 2 1341 not only solves the problem of excessive dust in traditional sand making machines, but also improves the stability and service life of the equipment through the spraying of high-pressure water mist, providing strong support for the performance improvement of dust suppression crushing and sand making machines.

[0044] Furthermore, two secondary crushing assemblies 5 for squeezing sand and gravel are symmetrically arranged in the drop channel 21. The two secondary crushing assemblies 5 both protrude from the surface of the drop channel 21, and the squeezing directions of the two secondary crushing assemblies 5 are opposite to each other. The secondary crushing assembly 5 includes a transmission crushing member 51 and an electric push rod 52. The transmission crushing member 51 is installed on the output shaft of the electric push rod 52 through a fixing member.

[0045] The transmission crushing member 51 includes a metal transmission belt 511 and two symmetrically arranged driving wheels 512, wherein one of the two driving wheels 512 is driven to rotate by a transmission motor 513, and the two driving wheels 512 are connected by a metal transmission belt 511 to form a belt transmission, and the two driving wheels 512 are supported by a support frame 514, and a block 515 is provided on the side of the support frame 514, and a slide rail 22 corresponding to the block 515 is provided in the falling channel 21, and the block 515 is embedded in the slide rail 22, and a fixing plate 516 is provided on the surface of the support frame 514 near the block 515, and the fixing plate 516 is connected to the output shaft of the electric push rod 52;

[0046] When the electric push rod 52 is started, its output shaft drives the fixed plate 516 and the support frame 514 to move back and forth. Since the support frame 514 supports the driving wheel 2 512 and the metal transmission belt 511, the entire transmission crushing component 51 will also move back and forth accordingly. When sand and gravel fall from the crushing bin 2 2 into the drop channel 21, the metal transmission belts 511 of the two secondary crushing components 5 will squeeze the sand and gravel. Since the metal transmission belt 511 is in a cyclic motion, it will continuously squeeze and relax the sand and gravel, thereby achieving secondary crushing. This reciprocating movement and extrusion crushing method can ensure that the sand and gravel are fully crushed in the drop channel 21, thereby improving the crushing efficiency and sand and gravel quality;

[0047] The metal transmission belt 511 has a plurality of convex strips arranged in an equidistant array on its surface, and the convex strips are arranged obliquely. When the two electric push rods 52 drive the transmission crushing components 51 connected thereto to move in opposite directions, the convex strips on the surfaces of the two metal transmission belts 511 will squeeze the crushed stones in contact therewith in opposite directions.

[0048] In the secondary crushing component 5 of the dust suppression type crushing sand making machine, the metal transmission belt 511 plays a vital role. Its surface is carefully designed with multiple inclined convex strips in an equidistant array. This unique structure not only increases the contact area between the transmission belt and the crushed stone, but also cleverly utilizes the inclination angle. When the two electric push rods 52 drive the connected transmission crushing components 51 to move in opposite directions, the convex strips on the two metal transmission belts 511 are like saw teeth moving in opposite directions, which effectively squeeze the crushed stone falling between them. When the inclined convex strips contact the crushed stone, they will generate a downward component force, so that the crushed stone is more firmly fixed between the transmission belts, thereby enhancing the squeezing and crushing effect. At the same time, these convex strips also shear and grind the gravel during the extrusion process, further refining the particle size of the gravel. Due to the circular motion of the metal transmission belt 511, the convex strips will continuously squeeze and relax the gravel. This reciprocating motion not only helps to break the gravel into smaller particles, but also promotes the uniform distribution of the gravel in the drop channel 21. In summary, the inclined convex strip design of the metal transmission belt 511 significantly improves the crushing efficiency of the secondary crushing component 5 by increasing the contact area, utilizing the inclination angle, generating downward force, shearing and grinding, and reciprocating motion, thereby ensuring the uniform distribution and refined particle size of the gravel, thereby optimizing the performance of the entire sand making machine.

[0049] Based on the above content, the present invention also proposes a working method of a dust suppression type crushing and sand making machine. During operation, the two crushing rollers 4 need to be started first, and then the pressure mechanism 3 is raised upward, and the stones to be crushed are put into the crushing bin 1, so that the stones roll to the middle of the crushing bin 1, and then the two crushing rollers 4 are used to crush the stones, and then the pressure mechanism 3 is moved downward during the crushing process, and the crushing wheel 331 in the pressure mechanism 3 is used to squeeze the stones to prevent the stones from bouncing up when being squeezed by the two crushing rollers 4, and the two metal transmission belts 511 protruding from the surface of the drop channel 21 are used to squeeze and crush the gravel falling between the two metal transmission belts 511 under the support of the driving wheel 2 512, and during the crushing, the two electric push rods 52 are used to drive the corresponding transmission crushing components 51 to move respectively, so that the two transmission crushing components 51 form an interval and staggered movement, and the contact surface between the two metal transmission belts 511 and the gravel is changed, so as to perform secondary crushing on the gravel;

[0050] When the stones are crushed, the pressurized water mist is sprayed outward through the booster unit 1341 in the dust reduction component 13, and the dust in the air is absorbed by the water mist to achieve the dust reduction effect;

[0051] Firstly, the present invention has achieved significant improvement in crushing efficiency and quality, and the working method cleverly combines a variety of crushing mechanisms: in the initial stage, the two crushing rollers 4 are started to perform preliminary crushing on the stones; then, the pressure mechanism 3 is timely lowered, and its crushing wheel 331 is used to deeply squeeze the stones, which effectively prevents the stones from bouncing during the crushing process, ensuring the continuity and stability of the crushing. What is more innovative is that the two metal transmission belts 511, supported by the second driving wheel 512, perform secondary extrusion and crushing on the gravel falling between them, and the driving of the electric push rod 52 causes the two transmission crushing components 51 to move in an intermittent manner, constantly changing the contact surface between the metal transmission belt 511 and the gravel. This dynamic extrusion method greatly improves the crushing efficiency and uniformity of the gravel, and ensures the quality of the sand and gravel produced by the sand making machine;

[0052] Secondly, breakthrough progress has been made in environmental dust reduction. During the stone crushing process, the booster unit 1341 in the dust reduction component 13 sprays pressurized water mist outward. This design cleverly utilizes the adsorption characteristics of water mist, effectively capturing and settling the dust generated during the crushing process, significantly reducing air pollution at the work site, and providing a healthier working environment for operators. At the same time, it also meets the current society's urgent needs for environmentally friendly production. This working method not only improves production efficiency, but also sets an industry benchmark in environmental protection.

[0053] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A dust suppression type crushing sand making machine, characterized in that: The crushing sand making machine is provided with a crushing bin 1 (1) and a crushing bin 2 (2), the crushing bin 2 (2) is connected to the lower end of the crushing bin 1 (1), the lower end of the crushing bin 2 (2) is provided with a drop channel (21) for discharging sand and gravel, the crushing bin 1 (1) is provided with a pressure mechanism (3), the crushing bin 2 (2) is symmetrically provided with two crushing rollers (4), the two crushing rollers (4) are respectively provided on the left and right sides of the lower end of the pressure mechanism (3), and the two crushing rollers (4) both rotate in the direction of the pressure mechanism (3); The pressure mechanism (3) comprises an extrusion body (31), an extrusion roller (33), and a driving wheel (32) for driving the extrusion roller (33) to rotate. The extrusion roller (33) is rotatably mounted on the lower end of the extrusion body (31). The driving wheel (32) is arranged on the side of the extrusion body (31). The extrusion roller (33) comprises a crushing wheel (331) and a driven wheel (332). The crushing wheels (331) are arranged equidistantly. The crushing wheels (331) and the driven wheels (332) are arranged coaxially. The driven wheels (332) pass through all the crushing wheels (331). The driving wheel (32) forms a belt drive with the driven wheels (332) via a transmission belt (34). A threaded pipe (311) and a hollow tube (312) are provided on the side of the extrusion body (31); a rod body (11) is mounted at a position corresponding to the hollow tube (312) in the crushing bin (1); a motor (12) is provided at a position corresponding to the threaded pipe (311) in the crushing bin (1); the rod body (11) passes through the hollow tube (312); an output shaft of the motor (12) passes through the threaded pipe (311) and forms a threaded connection with the threaded pipe (311), so as to drive the pressure mechanism (3) to rise and fall by rotating the output shaft of the motor (12); Two dust reduction components (13) are symmetrically arranged on the upper inner side of the crushing bin one (1), the dust reduction component (13) comprising an outer shell (131), a boosting pipe one (133), a boosting pipe two (134) and a connecting pipe body (135), the boosting pipe one (133) and the boosting pipe two (134) are connected via the connecting pipe body (135), the connecting pipe bodies (135) are arranged in an equidistant array, and both ends of the boosting pipe one (133) and the boosting pipe two (134) are connected. Each of the two booster tubes (133) is provided with a roller (132), and two sides of the inner end of the outer shell (131) are provided with a slide rail (1311). All the rollers (132) are installed in the corresponding slide rail (1311). The side of the booster tube (133) away from the booster tube (134) is connected to the output shaft of a telescopic driving cylinder (136), so that the booster tube (133) and the booster tube (134) are driven by the telescopic driving cylinder (136) to slide along the direction of the slide rail (1311); The boosting tube one (133) is provided with a boosting unit one (1331), and the inner ends of the boosting unit one (1331) and the boosting unit two (1341) are both expanded cavities. The boosting tube two (134) is provided with a boosting unit two (1341) corresponding to the boosting unit one (1331). The boosting unit one (1331) is connected to the water pump for water supply through a water supply pipe (3311), and the boosting unit two (1341) is connected to the air compressor for pressurization through a boosting air pipe (3412). The expanded cavities in the boosting unit one (1331) and the boosting unit two (1341) are both arranged toward the water supply pipe (3311), and the expanded cavities in the boosting unit one (1331) and the boosting unit two (1341) are connected through a connecting tube body (135); The expanded cavity in the second booster unit (1341) is provided with voltage stabilizing sheets (3411) in an equidistant array, and the voltage stabilizing sheets (3411) are arranged close to the connecting pipe body (135).

2. A dust suppression type crushing sand making machine according to claim 1, characterized in that: Two secondary crushing assemblies (5) for squeezing sand and gravel are symmetrically arranged in the falling channel (21); the two secondary crushing assemblies (5) both protrude from the surface of the falling channel (21); and the squeezing directions of the two secondary crushing assemblies (5) are opposite to each other; the secondary crushing assemblies (5) include a transmission crushing component (51) and an electric push rod (52); the transmission crushing component (51) is mounted on the output shaft of the electric push rod (52) via a fixing member; The transmission crushing component (51) comprises a metal transmission belt (511) and two symmetrically arranged driving wheels (512), wherein one of the two driving wheels (512) is driven to rotate by a transmission motor (513), and the two driving wheels (512) are connected by a metal transmission belt (511) to form a belt transmission, and the two driving wheels (512) are supported by a support frame (514), and a block (515) is provided on the side of the support frame (514), and a slide rail (22) corresponding to the block (515) is provided in the falling channel (21), and the block (515) is embedded in the slide rail (22), and a fixing plate (516) is provided on the surface of the support frame (514) near the block (515), and the fixing plate (516) is connected to the output shaft of the electric push rod (52).

3. A dust suppression type crushing sand making machine according to claim 2, characterized in that: The surface of the metal transmission belt (511) has a plurality of convex strips arranged in an equidistant array, and the convex strips are arranged obliquely. When the two electric push rods (52) drive the transmission crushing components (51) connected thereto to move in opposite directions, the convex strips on the surfaces of the two metal transmission belts (511) will squeeze the crushed stones in contact therewith in opposite directions.

4. A working method applied to the dust suppression type crushing sand making machine according to claim 3, characterized in that: During operation, the two crushing rollers (4) are first started, and then the pressure mechanism (3) is raised upward, and the stone to be crushed is put into the crushing bin (1) so that the stone rolls to the middle of the crushing bin (1), and then the two crushing rollers (4) crush the stone. Then, during the crushing process, the pressure mechanism (3) is moved downward, and the crushing wheel (331) in the pressure mechanism (3) is used to squeeze the stone to prevent the stone from bouncing up when being squeezed by the two crushing rollers (4). The two metal transmission belts (511) protruding from the surface of the drop channel (21) are used to squeeze and crush the crushed stone falling between the two metal transmission belts (511) under the support of the second driving wheel (512). During the crushing process, the two electric push rods (52) respectively drive the corresponding transmission crushing components (51) to move, so that the two transmission crushing components (51) move in an intermittent manner, and the contact surface between the two metal transmission belts (511) and the crushed stone is changed, thereby performing secondary crushing on the crushed stone. When the stones are crushed, pressurized water mist is sprayed outwards through the second pressurizing unit (1341) in the dust reduction component (13), and the dust in the air is absorbed by the water mist, thereby achieving a dust reduction effect.

Images