Dust falling device for stone crushing

Abstract

The utility model is applicable to the technical field of stone processing, and provides a dust falling device for stone crushing, which comprises a processing bin, a first guide plate, a second guide plate, a dust falling device and a dust falling device, the second guide plate is obliquely and downwards arranged on the other side of the reserved channel, and guide protrusions which are gradually dense in the flowing direction are distributed on the surface of the second guide plate; a feeding opening communicating with an inner cavity of the processing bin is defined by the first guide plate and the second guide plate. Through the synergistic effect of fan adsorption and a spraying dust falling system, dust particles in air are effectively adsorbed and captured, the dust concentration of a working site is greatly reduced by combining the wetting and precipitating functions of the water washing box, and the cleanliness of a working environment and the health and safety of workers are ensured; meanwhile, the optimized design of the feeding opening ensures that the stones stably and orderly enter the crushing cavity, smooth discharge of stone particles is promoted through the design of the conical shrinkage structure and the spiral flow guide ribs of the discharging channel, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to stone processing technical field especially, it relates to a dust falling device for stone crushing. BACKGROUND

[0002] In the ore mining and processing industry, the stone crushing link is very important, but the dust problem produced in the traditional crushing process is increasingly prominent, which seriously threatens the operation environment, the worker's health and the surrounding ecological environment, with the strictness of environmental protection regulations and the enhancement of environmental protection consciousness, effective control of dust emission in the stone crushing process has become a major issue to be solved in the industry;

[0003] The existing crushing dust removal technology has many deficiencies, mainly in the following aspects:

[0004] 1. Insufficient dust removal efficiency:

[0005] Simply relying on the spray dust falling system, the fine dust capture effect is poor, resulting in a large number of dust particles remaining in the air;

[0006] The strong turbulence generated by the material flow in the processing area aggravates the secondary dust raising phenomenon of dust, making dust control more difficult;

[0007] The spray system is not evenly covered, resulting in dust falling dead angles in some areas, and dust is difficult to be effectively captured and treated;

[0008] 2. Low degree of intelligence:

[0009] The existing dust removal system relies on manual adjustment of wind speed, water pressure and other parameters, and cannot adaptively adjust according to the change of material characteristics; resulting in unstable dust removal effect, and difficult to achieve the best dust falling effect. Utility model content

[0010] The utility model provides a dust falling device for stone crushing, which aims to solve the problems of low dust removal efficiency, difficulty in effectively capturing fine dust, and secondary dust raising caused by turbulence generated by material flow, and uneven coverage of the spray system causing dust falling dead angles in the existing crushing dust removal technology.

[0011] The utility model is realized in this way, a dust falling device for stone crushing, including processing bin, its top is provided with reserved channel, inside is provided with crushing cavity;

[0012] The first guide plate is vertically arranged on one side of the reserved channel;

[0013] The second guide plate is obliquely arranged on the other side of the reserved channel, and the surface of the second guide plate is provided with guide protrusions gradually dense along the flow direction;

[0014] The first guide plate and the second guide plate enclose a feeding opening in communication with the inner cavity of the processing chamber;

[0015] The outer side wall of the processing chamber is provided with a fan and a water washing tank, and the water washing tank is filled with washing water;

[0016] The suction end of the fan is communicated with a dust guide pipe, the dust guide pipe extends to the inner cavity of the processing chamber and is communicated with a conical suction cover, and the suction cover is provided with an intercepting filter screen;

[0017] The exhaust end of the fan is communicated to the lower region of the washing tank through the dust guide pipe;

[0018] An exhaust port is formed in the upper position of the side wall of the washing tank and is in communication with the washing tank.

[0019] Preferably, the side of the processing chamber away from the washing tank is provided with a spray main pipe, one end of which is in communication with an external water source, and the other end is divided into two U-shaped spray branch pipes through a three-way joint.

[0020] Preferably, one of the spray branch pipes extends to the middle region of the processing chamber and is communicated with a plurality of spiral sector nozzles, and the other spray branch pipe is inserted downward to the bottom crushing cavity and is communicated with a plurality of conical diffusion spray heads.

[0021] Preferably, a group of parallelly distributed mounting shafts are rotationally arranged in the middle of the inner cavity of the processing chamber, and a plurality of crushing tooth blocks arranged in a staggered manner are fixed on each of the two mounting shafts, and the meshing regions of the two groups of crushing tooth blocks are opposite to the jetting ranges of the spiral sector nozzles and the conical diffusion spray heads.

[0022] Preferably, a group of servo motors are arranged on the outer side wall of the processing chamber, and the output shaft of each servo motor is fixedly connected with the corresponding mounting shaft through a trapezoidal spline.

[0023] Preferably, a one-way valve body is arranged on the spray main pipe.

[0024] Preferably, a discharge port is formed in the bottom center of the processing chamber, a discharge channel is communicated with the discharge port, the discharge channel is conically contracted, and a spiral flow guide rib is arranged on the inner wall of the discharge channel.

[0025] Preferably, a dust concentration sensor is arranged on the inner wall of the processing chamber, a control box is arranged on the outer side wall of the processing chamber, an embedded processor is integrated in the control box, and the processor is connected with the dust concentration sensor, the one-way valve body and the fan through a CAN bus signal.

[0026] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0027] One: in the process of breaking the stone, the fan generates strong suction through the conical suction cover, effectively adsorbing the dust generated in the breaking cavity, at the same time, the spray dust removal system sprays water mist in the form of spiral fan and conical diffusion, quickly captures and adheres to the dust particles in the air, the synergistic effect of the fan adsorption and the spray adsorption can greatly reduce the dust concentration of the operation site, ensure the cleanliness of the operation environment, at the same time, the water washing box further purifies the air by wetting and precipitating dust particles.

[0028] Secondly, the feeding port of the device is composed of a vertically arranged first guide plate and an inclined downward second guide plate, which enables the stone to enter the breaking cavity stably and orderly, avoids production interruption caused by stone accumulation or poor sliding, and the discharge channel is conically contracted and provided with spiral guide ribs on the inner wall, which can guide the stone particles to rotate during flow, so that the stone particles are discharged more smoothly. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a three-dimensional structure schematic diagram of the utility model;

[0030] Figure 2 It is a three-dimensional structure schematic diagram of the utility model;

[0031] Figure 3 It is a front structure schematic diagram of the utility model;

[0032] Figure 4 It is a processing bin internal structure schematic diagram of the utility model;

[0033] Figure 5 It is a front sectional structure schematic diagram of the utility model;

[0034] Figure 6 It is a bottom view sectional structure schematic diagram of the utility model;

[0035] In the drawing: 1, processing bin; 2, first guide plate; 3, second guide plate; 4, guide protrusion; 5, fan; 6, water washing box; 7, dust guide pipe; 8, suction cover; 9, intercepting filter screen; 10, exhaust port; 11, spray main pipe; 12, spray branch pipe; 13, spiral fan-shaped nozzle; 14, conical diffusion spray head; 16, mounting shaft; 17, breaking tooth block; 18, servo motor; 19, reserved channel; 20, one-way valve body; 21, discharge port; 22, discharge channel; 23, spiral guide rib; 24, dust concentration sensor; 25, control box. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The terms "first," "second," and the like, as used herein do not imply a limitation on sequence or order of any described or illustrated features.

[0037] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art upon reading this description, the embodiments described herein are merely examples of implementations.

[0038] The utility model discloses an embodiment provides a kind of dust falling device for stone crushing, as shown in Figures 1-6 It includes processing bin 1, its top is provided with reserved passage 19, inside is provided with crushing cavity;

[0039] First guide plate 2 is vertically arranged in one side of reserved passage 19;

[0040] Second guide plate 3 is obliquely arranged in the other side of reserved passage 19, and the surface of the second guide plate 3 is provided with guide protrusions 4 gradually dense along the flow direction;

[0041] The first guide plate 2 and the second guide plate 3 form a feeding port which is communicated with the inner cavity of the processing bin 1;

[0042] The outer side wall of the processing bin 1 is provided with a fan 5 and a water washing box 6, and the water washing box 6 is filled with washing water;

[0043] The suction end of the fan 5 is communicated with a dust guide pipe 7, the dust guide pipe 7 extends to the inner cavity of the processing bin 1 and is communicated with a conical suction cover 8, and the suction cover 8 is provided with an intercepting screen 9;

[0044] The exhaust end of the fan 5 is communicated to the lower region of the water washing box through the dust guide pipe 7;

[0045] An exhaust port 10 is formed in the upper position of the side wall of the water washing box.

[0046] It should be noted that, due to the low dust removal efficiency of the existing crushing and dust removal technology, it is difficult to effectively capture fine dust, and the turbulent flow caused by the material flow leads to serious secondary dust raising, and the uneven coverage of the spraying system causes dust removal dead angles; The low degree of intelligence cannot adapt to the change of material characteristics. The dust control system of the present scheme includes real-time monitoring of the dust concentration sensor 24, timely starting of the fan 5 and effective cooperation of the spraying dust removal system, which greatly reduces the dust concentration in the air and significantly improves the cleanliness of the working environment, thereby ensuring the health and safety of workers. On the other hand, the conical contraction structure of the discharge channel 22 and the spiral guide rib 23 design optimize the discharge path of the stone, improve the crushing efficiency and discharge speed, and make the whole crushing operation more efficient and smooth. The advantages of these two aspects promote the sustainable development of stone crushing operation and improve the overall production efficiency.

[0047] Specifically, in the present embodiment, the present scheme mainly includes a processing bin 1. In the stone crushing operation, the stone to be crushed is fed into the feeding port of the processing bin 1. This feeding port is formed by a vertically arranged first guide plate 2 and an inclined downward second guide plate 3. The first guide plate 2 mainly plays a role in guiding the stone to enter smoothly, while the second guide plate 3 is inclined and has guide protrusions 4 on the surface that gradually become denser along the flow direction, so that the stone enters the crushing cavity more stably and orderly during the sliding process.

[0048] During the process of the stone sliding into the crushing cavity, part of the impurities and dust attached to the surface of the stone will be adsorbed by the pre-set conical adsorption cover 8. The conical adsorption cover 8 is connected to the adsorption end of the fan 5 on the outer wall of the processing bin 1 through the dust guide pipe 7.

[0049] When the stone enters the crushing cavity for crushing operation, a large amount of dust will be generated. In order to effectively handle these dusts, the fan 5 is started. The strong suction force generated by the fan 5 sucks the dust generated in the crushing cavity into the dust guide pipe 7 through the conical adsorption cover 8 and sends it to the water washing tank 6. The conical adsorption cover 8 is provided with an interception screen 9, which can not only effectively intercept the dust, but also avoid potential damage to the fan 5 caused by large particles of impurities.

[0050] The water washing tank 6 is filled with an appropriate amount of washing water. When the air containing dust passes through the water washing tank 6, the dust particles will fully contact and be wetted by the washing water, and then precipitate, thereby further reducing the dust concentration in the air.

[0051] Finally, the air purified by the water washing tank 6 will be smoothly discharged from the exhaust port 10 opened on the upper part of the side wall of the water washing tank 6. Since the dust content in the air has been greatly reduced at this time, it will not cause significant pollution to the external environment.

[0052] The utility model discloses further preferable embodiment, as shown in 2-6, the processing warehouse 1 is provided with the spray main pipe 11 away from the side of washing water tank, its one end is linked with the outside water source, and the other end is shunted into two U-shaped spray branch pipes 12 through the three -way joint.

[0053] In the embodiment, one end of the spray main pipe 11 is closely communicated with the external water source, ensuring the continuous and stable water supply of the other end, and the other end is shunted into two U-shaped spray branch pipes 12 through the three -way joint, expanding the spray area, when the stone is broken, the water flow sprays fine and uniform water mist along the predetermined track to the breaking cavity and its surrounding area, which not only helps to cool the high temperature generated by the breaking operation, but more importantly, it can effectively capture and adhere to the dust particles suspended in the air, thereby inhibiting the diffusion of dust to a certain extent.

[0054] The utility model discloses further preferable embodiment, as shown in Figure 4 Among them, one of the spray branch pipes 12 extends to the middle area of the processing warehouse 1 and is communicated with a plurality of spiral fan-shaped nozzles 13, and the other spray branch pipe 12 is inserted downward into the bottom breaking cavity and is communicated with a plurality of conical diffusion spray heads 14.

[0055] In the embodiment, the spiral fan-shaped nozzles 13 spray water mist in a spiral fan-shaped manner, which can cover the broad space in the middle of the processing warehouse 1, and when the stone generates dust during the breaking process, the water mist can quickly capture and adhere to the dust particles, effectively inhibiting the diffusion of dust; the other spray branch pipe 12 is inserted downward into the bottom breaking cavity and is communicated with a plurality of conical diffusion spray heads 14, and the conical diffusion spray heads 14 spray water mist downward in a conical diffusion manner, which can directly act on the stone and dust in the breaking cavity, and the water mist not only can wet the surface of the stone to reduce the generation of dust, but also can quickly settle the generated dust particles to the ground, further reducing the dust concentration in the air; through the two spray branch pipes 12 and the respective nozzle designs, the dust in the processing warehouse 1 is controlled and treated in all directions and multiple levels.

[0056] The utility model discloses further preferable embodiment, as shown in Figure 4 A group of parallelly distributed mounting shafts 16 are rotationally arranged in the middle of the inner cavity of the processing warehouse 1, and the two mounting shafts 16 are both fixedly provided with the staggered breaking tooth blocks 17, and the meshing areas of the two groups of breaking tooth blocks 17 are opposite to the spray ranges of the spiral fan-shaped nozzles 13 and the conical diffusion spray heads 14.

[0057] In the embodiment, when the mounting shaft 16 rotates, the two groups of breaking tooth blocks 17 continuously stagger and collide, effectively breaking the fed stone into smaller particles, and the meshing areas of the two groups of breaking tooth blocks 17 are opposite to the spray ranges of the spiral fan-shaped nozzles 13 and the conical diffusion spray heads 14, which can timely capture and adhere to the dust particles generated by breaking.

[0058] Further preferably, as shown in the drawings, Figure 6 The outer side wall of the processing bin 1 is provided with a group of servo motors 18, and the output shaft of each servo motor 18 is fixedly connected with the corresponding mounting shaft 16 through a trapezoidal spline.

[0059] In this embodiment, when the servo motor 18 is started, the output shaft drives the corresponding mounting shaft 16 to rotate through the trapezoidal spline, and the crushing tooth block 17 on the mounting shaft 16 also starts to work to crush the stones into smaller particles at an accurate speed and force. At the same time, since the servo motor 18 has accurate speed control and position feedback functions, the crushing process can be accurately controlled to ensure the stability of the crushing efficiency and product quality.

[0060] Further preferably, as shown in the drawings, Figure 6 The one-way valve body 20 is arranged on the spray main pipe 11.

[0061] In this embodiment, the one-way valve body 20 can effectively prevent the backflow and leakage of water flow, thereby ensuring the stability and reliability of the spray dust removal system. When the external water source supplies water to the spray main pipe 11, the one-way valve body 20 is automatically opened to allow the water flow to pass smoothly and flow to each spray branch pipe 12 and nozzle. When the water source is closed or the water pressure is reduced, the one-way valve body 20 is automatically closed to prevent the backflow of water flow to the water source or unnecessary leakage.

[0062] Further preferably, as shown in the drawings, Figure 6 The bottom of the processing bin 1 is centrally provided with a discharge port 21, and the discharge port 21 is communicated with a discharge channel 22, which is in a conical shrinkage structure and is provided with spiral flow guide ribs 23 on the inner wall.

[0063] In this embodiment, this structure can gradually reduce the cross-sectional area of the channel, thereby increasing the flow rate and discharge efficiency of the stones. At the same time, the conical shrinkage structure can also guide the stone particles to flow along a specific path to avoid blockage and accumulation. The inner wall of the discharge channel 22 is also provided with spiral flow guide ribs 23, which are arranged in a spiral manner to guide the stone particles to produce rotational motion during the flow process. This rotational motion not only helps the stone particles to be discharged more smoothly, but also further crushes larger particles to improve the crushing efficiency.

[0064] Further preferably, as shown in the drawings, Figure 1 The inner wall of the processing bin 1 is provided with a dust concentration sensor 24, and the outer side wall is provided with a control box 25, which is integrated with an embedded processor (ST STM32F407). The processor is connected with the dust concentration sensor 24 (S7-1200), the one-way valve body and the fan 5 through a CAN bus signal.

[0065] In this embodiment, when the processor receives a signal that the dust concentration exceeds the standard, it will immediately start the fan 5, through the conical adsorption cover 8, the dust generated in the crushing cavity is sucked into the dust guide pipe 7 and sent to the water washing box 6 for purification treatment, at the same time, in order to further enhance the dust falling effect, the processor can also control the one-way valve body 20 to start, supply water to the spray main pipe 11, spray water mist through the spiral fan-shaped nozzle 13 and the conical diffusion spray head 14, further capture and adhere to the dust particles in the air.

[0066] Working principle: When the device is used, the stones to be crushed are sent into the upper inlet of the processing bin 1; this upper inlet is jointly composed of a vertically arranged first guide plate 2 and an inclined downward second guide plate 3, wherein the first guide plate 2 guides the stones to smoothly enter, and the second guide plate 3, by virtue of its inclined design and the gradually dense guide protrusions 4 on its surface along the flow direction, makes the stones more stable and orderly enter the crushing cavity during the downward sliding process;

[0067] In the process of stone sliding, part of the impurities and dust attached to the surface of the stone will be adsorbed by the pre-set conical adsorption cover 8; this conical adsorption cover 8 is tightly connected with the adsorption end of the fan 5 outside the wall of the processing bin 1 through the dust guide pipe 7; after the stone enters the crushing cavity, the servo motor 18 is started, its output shaft drives the corresponding mounting shaft 16 to rotate through the trapezoidal spline, and the crushing tooth block 17 on the mounting shaft 16 starts to crush the stone into smaller particles with precise speed and force; since the servo motor 18 has precise speed control and position feedback functions, the stability and efficiency of the crushing process can be ensured;

[0068] At the same time of the crushing operation, a large amount of dust will be generated; in order to effectively handle these dusts, the fan 5 is started to generate strong suction; through the conical adsorption cover 8, the dust in the crushing cavity is sucked into the dust guide pipe 7 and sent to the water washing box 6; the intercepting filter screen 9 arranged in the conical adsorption cover 8 not only can effectively intercept the dust, but also avoids potential damage to the inside of the fan 5 caused by large particle impurities;

[0069] The water washing box 6 is filled with an appropriate amount of washing water; when the air containing dust passes through the water washing box 6, the dust particles will fully contact and be wetted by the washing water and precipitate, thereby greatly reducing the dust concentration in the air; the air after purification treatment by the water washing box 6 will be smoothly discharged from the exhaust port 10 opened on the upper part of the side wall of the water washing box 6, at this time the dust content in the air has been significantly reduced, which will not cause significant pollution to the external environment;

[0070] In order to further enhance the dust effect, the processing bin 1 is also provided with a spray dust falling system; one end of the spray main pipe 11 is closely connected with an external water source to ensure continuous and stable water supply; the other end is branched into two U-shaped spray branch pipes 12 through a tee joint; one of the spray branch pipes 12 extends to the middle area of the processing bin 1 and is connected with a plurality of spiral fan-shaped nozzles 13, which spray water mist in a spiral fan-shaped manner to cover the space in the middle of the processing bin 1, quickly capturing and adhering to the dust particles generated by crushing; the other spray branch pipe 12 is inserted downward into the bottom crushing cavity and is connected with a plurality of conical diffusion spray heads 14, which spray water mist downward in a conical diffusion manner, directly acting on the stones and dust in the crushing cavity, further reducing the dust concentration in the air;

[0071] Finally, the crushed stone particles are discharged from the discharge opening 21 formed in the bottom center of the processing bin 1; the discharge opening 21 is connected with a discharge channel 22, which is a conical contraction structure that can gradually reduce the cross-sectional area of the channel, increase the flow rate of the stones and the discharge efficiency; at the same time, the inner wall of the discharge channel 22 is also provided with spiral flow guide ribs 23 arranged in a spiral manner to guide the stone particles to produce rotational motion during the flow process, which helps the stone particles to be discharged more smoothly and further improves the crushing efficiency;

[0072] During the whole process, the dust concentration sensor 24 arranged on the inner wall of the processing bin 1 monitors the dust concentration in real time and transmits the data to the embedded processor in the control box 25 through CAN bus signal; when the processor receives the signal that the dust concentration exceeds the standard, it will immediately start the fan 5 for dust adsorption treatment, and can control the one-way valve body 20 to start water supply to the spray main pipe 11, and further reduce dust by spraying water mist through the spray branch pipe 12 and the nozzle; This intelligent dust control system ensures the cleanliness of the working environment and the health and safety of workers.

[0073] It should be noted that for the foregoing embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0074] In several embodiments provided by the present application, it should be understood that the disclosed apparatus can be implemented by other manners. For example, the apparatus embodiments described above are merely illustrative, for example, the division of the above units can have another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection between the units or components through some interfaces, and can be electrical or other forms.

[0075] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0076] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add or delete or make other adjustments to the features in each embodiment of the present application according to the circumstances without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also belong to the scope of the present application.

Claims

1. A dust reducing device for stone breaking, characterized by, The utility model relates to a processing bin, which comprises: a processing bin having a reserved channel formed on the top and a crushing cavity formed inside; a first guide plate vertically arranged on one side of the reserved channel; a second guide plate obliquely arranged on the other side of the reserved channel, the surface of which is provided with guide protrusions gradually dense along the flow direction; an upper feeding port formed between the first guide plate and the second guide plate and connected to the inner cavity of the processing bin; a fan and a water washing tank arranged on the outer side wall of the processing bin, the water washing tank being filled with washing water; a dust guide pipe connected to the suction end of the fan, the dust guide pipe extending into the inner cavity of the processing bin and being connected to a conical suction cover, the suction cover being provided with an intercepting screen; the discharge end of the fan being connected to the lower region of the water washing tank through the dust guide pipe; an exhaust port formed in the upper position of the side wall of the water washing tank and connected to the water washing tank; 2. A dust reduction device for crushing stones according to claim 1, wherein a spray main pipe arranged on the side of the processing bin away from the water washing tank, one end of the spray main pipe being connected to an external water source and the other end of the spray main pipe being branched into two U-shaped spray branch pipes through a three-way joint.

3. A dust settling device for stone breaking as claimed in claim 2, characterized in that One of the spray branch pipes extends to the middle region of the processing bin and is connected to a plurality of spiral sector nozzles, and the other spray branch pipe is inserted downward into the bottom crushing cavity and is connected to a plurality of conical diffusion spray heads.

4. A dust settling device for stone breaking as claimed in claim 3, characterized in that A group of parallel arranged mounting shafts are rotatably arranged in the middle region of the inner cavity of the processing bin, a plurality of staggered arranged crushing tooth blocks are fixedly arranged on the two mounting shafts, and the meshing regions of the two groups of crushing tooth blocks are opposite to the spraying ranges of the spiral sector nozzles and the conical diffusion spray heads.

5. A dust settling device for stone breaking as claimed in claim 4, characterized in that A group of servo motors are arranged on the outer side wall of the processing bin, the output shaft of each servo motor is fixedly connected to the corresponding mounting shaft through a trapezoidal spline.

6. The dust reducing device for crushing stone according to claim 2, wherein A one-way valve body is arranged on the spray main pipe.

7. A dust settling device for crushing stones as claimed in claim 5 wherein, A discharge port is formed in the bottom center of the processing bin, a discharge channel is connected to the discharge port, the discharge channel is conically contracted, and a spiral flow guide rib is arranged on the inner wall of the discharge channel.

8. A dust settling device for stone breaking as claimed in claim 7, characterized in that A dust concentration sensor is arranged on the inner wall of the processing bin, a control box is arranged on the outer side wall of the processing bin, an embedded processor is integrated in the control box, and the processor is connected to the dust concentration sensor, the one-way valve body and the fan through a CAN bus signal.

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