Dust falling device for gravel crushing

Abstract

The utility model belongs to the technical field of gravel crushing, and particularly relates to a dust falling device for gravel crushing, the dust falling device is arranged in a rotor assembly in a shell of a gravel crusher, the crusher comprises a feed port and a discharge port, and the dust falling device is used for spraying dust falling liquid into the shell along with rotation of the rotor assembly. The dust falling device sprays dust falling liquid into the machine shell along with rotation of the rotor assembly, so that raised dust generated by crushing gravel through the rotor assembly and the impact plate is condensed and settled with water, the raised dust generated in the machine shell is settled before overflowing out of the crusher, the air and the environment of a gravel crushing work site are protected, and operators are protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand and gravel crushing, and particularly relates to a dust reduction device for sand and gravel crushing. Background Art

[0002] Stone crushers are widely used in industries such as mines, construction, cement, chemical engineering, and metallurgy. Generally, they are divided into impact crushers, cone crushers, and jaw crushers according to different structural forms. Among them, impact crushers rely on the impact and collision of materials on a high-speed rotating rotor to achieve crushing. That is, when the stone enters the crushing chamber, it will be impacted by the high-speed rotating plate hammer, which is the first-stage crushing. The impact force pushes the stone towards the impact plate, causing the sand and gravel to undergo secondary crushing. Some sand and gravel collide with each other in the crushing chamber, forming tertiary crushing until the required fineness is reached.

[0003] During the crushing process, a large amount of debris and dust will be generated by the stone, and the dust will cause environmental pollution and seriously affect the physical health of on-site workers. Content of the Utility Model

[0004] The purpose of the utility model is to provide a dust reduction device for sand and gravel crushing aiming at the above existing technical problems, achieving the effects of protecting the air and environment of the sand and gravel crushing work site and protecting the operators.

[0005] In view of this, the utility model provides a dust reduction device for sand and gravel crushing. The dust reduction device is arranged in the rotor assembly inside the casing of the sand and gravel crusher, and is used for spraying dust reduction liquid into the casing as the rotor assembly rotates.

[0006] In this technical solution, the main raw material of the dust reduction liquid is water. Spraying the dust reduction liquid into the casing as the rotor assembly rotates can cause the dust generated by the rotor assembly crushing the sand and gravel to condense and settle with the water, so that the dust generated inside the casing can be settled before overflowing to the feed inlet and the discharge outlet, protecting the air and environment of the sand and gravel crushing work site and protecting the operators.

[0007] Further, the rotor assembly includes:

[0008] A central shaft, which is connected to the crushing drive source and can rotate circumferentially;

[0009] A sleeve, which is coaxially sleeved outside the central shaft and fixedly connected to the central shaft;

[0010] Fixed disks, which are coaxially sleeved outside the sleeve and fixedly connected to the sleeve. There are multiple fixed disks arranged along the length direction of the sleeve, and a number of connecting grooves are evenly distributed along the circumferential direction on the fixed disks;

[0011] Plate hammers, one end of which is arranged in the connecting groove and fixedly connected to the connecting groove, and the other end is higher than the outer circumference of the fixed disk.

[0012] Further, the dust-removing device includes a liquid source arranged outside the crusher. An inlet liquid channel is axially formed in the central shaft. One end of the inlet liquid channel is closed and the other end is open. The liquid source is connected to the open end of the inlet liquid channel to supply liquid to the inlet liquid channel. A plurality of liquid distribution holes penetrating the central shaft are circumferentially formed in the central shaft. The liquid distribution holes are communicated with the inlet liquid channel. A plurality of liquid outlet holes penetrating the sleeve are circumferentially formed in the sleeve. Liquid outlet holes are provided on the sleeve wall between adjacent two fixed disks. An annular groove concentric with the axis of the sleeve is axially formed in the sleeve. A liquid-absorbing cotton is fixedly arranged in the annular groove.

[0013] In this technical solution, the dust-removing liquid of the liquid source is sent to the inlet liquid channel by the action of a liquid pump. The dust-removing liquid in the inlet liquid channel enters the sleeve through the liquid distribution holes, and then is absorbed by the liquid-absorbing cotton and is thrown out from the liquid outlet holes to the inner cavity of the machine shell by centrifugal force. In order not to affect the crushing efficiency of the crusher, the rotation speed of the rotor assembly cannot be slowed down. The liquid-absorbing cotton is increased to provide an adsorption force for the dust-removing liquid, weaken the throwing speed of the dust-removing liquid generated by the centrifugal force, reduce the amount of the dust-removing liquid thrown out per unit time, and prevent there from being too much dust-removing liquid in the inner cavity of the machine shell, and the liquid-absorbing cotton can also block small sand and gravel from entering the central shaft through the liquid outlet holes.

[0014] Further, the liquid-absorbing cotton is annular. A plurality of positioning pieces are circumferentially arranged on the liquid-absorbing cotton. Positioning grooves adapted to the positioning pieces are arranged on the groove wall of the annular groove.

[0015] In this technical solution, the liquid-absorbing cotton can be more easily assembled into the annular groove by guiding and inserting the positioning pieces into the positioning grooves.

[0016] Further, a collecting assembly is arranged on one side of the discharge port away from the counterattack plate of the crusher. The collecting assembly is used for collecting the dust-removing liquid.

[0017] In this technical solution, on one side of the discharge port away from the counterattack plate, there is basically no sand and gravel falling and crushing. Therefore, the dust-removing liquid sprayed out from the rotor assembly has no excessive dust-removing effect on one side of the discharge port away from the counterattack plate, and will fall onto the conveyor belt of the sand and gravel below the discharge port, which will make the sand and gravel too wet and affect the subsequent process operations. Using the collecting assembly to collect the dust-removing liquid can prevent the sand and gravel from being too wet.

[0018] Further, the collecting assembly includes:

[0019] A collecting box, the top of the collecting box is inclined and open, the bottom of the collecting box is also inclined, and a recovery port is arranged at the lowest point of the bottom;

[0020] A filter screen, the filter screen is obliquely and fixedly covered on the opening at the top of the collecting box.

[0021] In this technical solution, a small amount of sand and gravel will fall into the collection component during the crushing process. Setting a filter can prevent larger sand and gravel from falling into the collection box and causing waste, and reduces the risk of the recovery port being blocked. Because the filter is set at an angle, the sand and gravel can fall naturally along the slope.

[0022] Furthermore, the collection component also includes an anti-retention component, which is used to accelerate the sliding of sand and gravel on the filter screen.

[0023] In this technical solution, the rotor assembly will continuously throw out dust reduction liquid onto the filter during its rotation, and the direction is opposite to the inclination direction of the filter, which will prevent the natural falling of sand and gravel on the filter. If the fallen sand and gravel do not fall on the filter for a long time and continue to absorb the dust reduction liquid, its humidity will be much higher than that of the rest of the sand and gravel, and the consistency of dryness and wetness will be poor, which will cause difficulties in the selection of subsequent process parameters. The anti-retention component accelerates the sliding of sand and gravel on the filter to reduce the problem of poor consistency of dryness and wetness of sand and gravel, and ensure the quality of crushing and dust reduction.

[0024] Furthermore, the anti-retention component includes:

[0025] A driving motor, a fixing plate is fixedly arranged on the side of the collection box and a part of the fixing plate is located inside the collection box, the driving motor is fixedly arranged on the part of the fixing plate located outside the collection box, and a clearance groove is provided on the collection box;

[0026] The anti-retention rod comprises a first rod segment, a second rod segment, and a third rod segment connected in sequence, wherein the first rod segment and the second rod segment form an obtuse angle, and the second rod segment and the third rod segment form an acute angle, the distance from the connection between the second rod segment and the third rod segment to the filter screen is smaller than the distance from the connection between the first rod segment and the second rod segment to the filter screen, and the third rod segment extends to both sides away from the end of the second rod segment;

[0027] a driving rod, one end of which is rotatably connected to the output shaft of the driving motor, and the other end of which is rotatably connected to an end of the first rod segment away from the second rod segment;

[0028] A fixed shaft, the fixed shaft being arranged on a portion of the fixed plate located inside the collecting box, the fixed shaft being parallel to the output shaft of the driving motor and having a vertical height lower than the output shaft of the driving motor;

[0029] A control rod, one end of which is rotatably connected to the fixed shaft, and the other end of which is rotatably connected to the connection between the first rod segment and the second rod segment.

[0030] In this technical solution, the driving motor starts, causing the output shaft of the driving motor to rotate counterclockwise, driving the driving rod to rotate, and moving the anti-retention rod. The control rod can only swing left and right to limit the rotation of the anti-retention rod. The connection between the second rod segment and the third rod segment impacts the filter screen, and then the third rod segment splashes the lifted dust suppression liquid onto the filter screen. Impacting the filter screen can shake off the sand and gravel on the filter screen, and splashing the dust suppression liquid onto the filter screen can make the sand and gravel jump or at least offset and weaken the pressure of the rotor assembly throwing out the dust suppression liquid, further accelerating the sliding of the sand and gravel on the filter screen. Most of the dust suppression liquid splashed onto the filter screen after being lifted will fall back into the collection box again.

[0031] Furthermore, a supplementary liquid inlet is provided in the collection box. A first valve is provided at the supplementary liquid inlet, and the supplementary liquid inlet is connected to the first valve through a pipeline. A second valve is provided at the recovery port. A water level sensor is provided in the collection box, and the water level sensor is connected to the controller. The controller is used to control the opening and closing of the two valves.

[0032] In this technical solution, the recovery port is normally open. When the water level sensor senses that the dust suppression liquid in the collection box is less than the preset value, the second valve is closed to close the recovery port, and the first valve is opened to supplement the liquid into the collection box; when the water level sensor senses that the dust suppression liquid in the collection box is higher than the preset value, the first valve is closed.

[0033] The beneficial effects of the present utility model are as follows:

[0034] 1. When the dust suppression device sprays the dust suppression liquid into the casing along with the rotation of the rotor assembly, the dust and sand generated by the crushing of the rotor assembly and the impact plate can condense and settle with water, so that the dust generated in the casing can settle before overflowing to the feed inlet and the discharge outlet, protecting the air and environment of the sand and gravel crushing work site and protecting the operators.

[0035] 2. Adding the liquid-absorbing cotton can provide an adsorption force for the dust suppression liquid, weaken the throwing speed of the dust suppression liquid due to centrifugal force, reduce the amount of the dust suppression liquid thrown out per unit time, prevent there from being too much dust suppression liquid in the inner cavity of the casing, and the liquid-absorbing cotton can also block the fine sand and gravel from entering the central shaft through the liquid outlet holes.

[0036] 3. By guiding and inserting the positioning piece into the positioning groove, the liquid-absorbing cotton can be more easily assembled into the annular groove.

[0037] 4. Using the collection component to collect the dust suppression liquid can prevent the sand and gravel from being too wet. The anti-retention component accelerating the sliding of the sand and gravel on the filter screen can reduce the problem of poor consistency in the dryness and humidity of the sand and gravel, ensuring the quality of crushing and dust suppression. Description of the Drawings

[0038] Figure 1 is a three-dimensional view of the crusher;

[0039] Figure 2 is a cross-sectional view of the crusher;

[0040] Figure 3 is a longitudinal sectional view of the rotor assembly;

[0041] Figure 4 is a transverse sectional view of the rotor assembly;

[0042] Figure 5 is a state diagram of the anti-stagnation component hitting the filter screen;

[0043] Figure 6 is a state diagram of the anti-stagnation component splashing the dust-removing liquid onto the filter screen;

[0044] Figure 7 is a perspective view of the collection component;

[0045] Figure 8 is a perspective view of the collection component;

[0046] The markings in the figure are shown as:

[0047] 1. Housing; 2. Feed inlet; 3. Discharge outlet; 4. Rotor assembly; 5. Impact plate; 7. Central shaft; 8. Sleeve; 9. Fixed plate; 10. Plate hammer; 11. Connection groove; 12. Liquid inlet channel; 13. Liquid distribution hole; Liquid outlet hole; 15. Annular groove; 16. Absorbent cotton; 17. Positioning piece; 18. Positioning groove; 19. Collection component; 20. Dust-removing liquid; 21. Collection box; 22. Filter screen; 23. Recovery port; 24. Driving motor; 25. Anti-stagnation rod; 26. Driving rod; 27. Fixed shaft; 28. Control rod; 29. Fixed plate; 30. Relief groove; 31. First rod segment; 32. Second rod segment; 33. Third rod segment; 34. Supplementary liquid inlet. Specific embodiments

[0048] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope protected by the present application.

[0049] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters in the following drawings denote like items, and thus, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0050] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data may be interchanged where appropriate so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object may be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0051] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0052] It should be noted that in this application, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0053] Embodiment 1

[0054] As Figure 1-2 shown, a gravel crusher includes a housing 1, a feed inlet 2 and a discharge outlet 3 are provided on the housing 1, and further includes a rotor assembly 4, a counter-attack plate 5 and a dust reduction device disposed in the inner cavity of the housing 1. The rotor assembly 4 is connected to a crushing drive source and can rotate circumferentially; the counter-attack plate 5 is used to bounce the stone material back to the rotor assembly 4; the dust reduction device is disposed in the rotor assembly 4, and the dust reduction device is used to spray a dust reduction liquid 20 into the housing 1 as the rotor assembly 4 rotates.

[0055] The main raw material of the dust reduction liquid 20 is water. Spraying the dust reduction liquid into the housing 1 as the rotor assembly 4 rotates can cause the dust generated by the rotor assembly 4 and the counter-attack plate 5 to crush the sand and gravel to condense and settle with water, so that the dust generated in the housing 1 can be settled before overflowing to the feed inlet 2 and the discharge outlet 3, protecting the air and environment of the sand and gravel crushing work site and protecting the operators.

[0056] Embodiment 2

[0057] As Figure 2-4 shown, the rotor assembly 4 includes a central shaft 7, a sleeve 8, a fixing plate 9 and a plate hammer 10. The middle part of the central shaft 7 is disposed in the inner cavity of the housing 1, both ends of the central shaft 7 are rotatably disposed on the housing 1, and the central shaft 7 is connected to the crushing drive source and can rotate circumferentially; the sleeve 8 is coaxially sleeved outside the central shaft 7 and fixedly connected to the central shaft 7; the fixing plate 9 is coaxially sleeved outside the sleeve 8 and fixedly connected to the sleeve 8, a plurality of fixing plates 9 are arranged along the length direction of the sleeve 8, and a number of connecting grooves 11 are uniformly distributed along the circumferential direction on the fixing plate 9; one end of the plate hammer 10 is disposed in the connecting groove 11 and fixedly connected to the connecting groove 11, and the other end is higher than the outer circumference of the fixing plate 9.

[0058] The dust-removing device includes a liquid source arranged outside the machine housing 1. An inlet liquid channel 12 is axially formed in the central shaft 7. One end of the inlet liquid channel 12 is closed and the other end is open. The liquid source is connected to the open end of the inlet liquid channel 12 to supply liquid to the inlet liquid channel 12. A plurality of liquid distribution holes 13 penetrating the central shaft 7 are circumferentially formed in the central shaft 7. The liquid distribution holes 13 are communicated with the inlet liquid channel 12. A plurality of liquid outlet holes 14 penetrating the sleeve 8 are circumferentially formed in the sleeve 8. The liquid outlet holes 14 are arranged on the sleeve 8 wall between adjacent two fixing plates 9. An annular groove 15 concentric with the axis of the sleeve 8 is axially formed in the sleeve 8. A liquid absorption cotton 16 is fixedly arranged in the annular groove 15.

[0059] The dust-removing liquid 20 of the liquid source is sent to the inlet liquid channel 12 by the action of a liquid pump. The dust-removing liquid 20 in the inlet liquid channel 12 enters the sleeve 8 through the liquid distribution holes 13, and then is absorbed by the liquid absorption cotton 16 and thrown out from the liquid outlet holes 14 into the inner cavity of the machine housing 1 by centrifugal action. In order not to affect the crushing efficiency of the crusher, the rotation speed of the rotor assembly 4 cannot be slowed down. The liquid absorption cotton 16 can provide an adsorption force to the dust-removing liquid 20, weaken the throwing speed of the dust-removing liquid 20 generated by centrifugal force, reduce the amount of the dust-removing liquid 20 thrown out per unit time, and prevent excessive dust-removing liquid 20 in the inner cavity of the machine housing 1. Moreover, the liquid absorption cotton 16 can also block fine sand and gravel from entering the central shaft 7 through the liquid outlet holes 14.

[0060] The liquid absorption cotton 16 is annular. A plurality of positioning pieces 17 are circumferentially arranged on the liquid absorption cotton 16. Positioning grooves 18 adapted to the positioning pieces 17 are arranged on the groove wall of the annular groove 15. By guiding and inserting the positioning pieces 17 into the positioning grooves 18, the liquid absorption cotton 16 can be more easily assembled into the annular groove 15.

[0061] Embodiment III

[0062] As Figure 5-8 shown, a collection assembly 19 is arranged on one side of the discharge port 3 away from the counterattack plate 5. The collection assembly 19 is used to collect the dust-removing liquid 20. Since there is basically no sand and gravel falling and crushing on one side of the discharge port 3 away from the counterattack plate 5, the dust-removing liquid 20 sprayed out from the rotor assembly 4 has little dust-removing effect on one side of the discharge port 3 away from the counterattack plate 5, and will fall onto the conveyor belt of the sand and gravel below the discharge port 3, making the sand and gravel too wet and affecting the subsequent process operation. Using the collection assembly 19 to collect the dust-removing liquid 20 can prevent the sand and gravel from being too wet.

[0063] The collection assembly 19 includes a collection box 21 and a filter 22. The collection box 21 has an inclined top and an open bottom, with a recovery port 23 located at the lowest point. The filter 22 has an inclined fixed cover located at the top opening of the collection box 21. During the crushing process, a small amount of sand and gravel will fall into the collection assembly 19. The filter 22 prevents larger sand and gravel from falling into the collection box 21 and causing waste. It also reduces the risk of clogging the recovery port 23. The inclined setting of the filter 22 allows the sand and gravel to fall naturally along the slope.

[0064] The collection assembly 19 also includes an anti-retention assembly, which is used to accelerate the sliding of sand and gravel on the filter screen 22. Because the rotor assembly 4 continuously throws dust-reducing liquid 20 onto the filter screen 22 during rotation, in a direction opposite to the inclination direction of the filter screen 22, it will prevent the natural falling of sand and gravel on the filter screen 22. If the fallen sand and gravel do not fall on the filter screen 22 for a long time and continue to absorb the dust-reducing liquid 20, their humidity will be much higher than that of the remaining sand and gravel, resulting in poor consistency in dryness and wetness, which makes it difficult to select parameters for subsequent processes. The anti-retention assembly accelerates the sliding of sand and gravel on the filter screen 22, which can reduce the problem of poor consistency in dryness and wetness of sand and gravel and ensure the quality of dust reduction.

[0065] The anti-retention assembly includes a drive motor 24, an anti-retention rod 25, a drive rod 26, a fixed shaft 27, and a control rod 28. The fixed plate 29 is fixedly arranged on the side of the collection box 21, and part of the fixed plate 29 is located inside the collection box 21. The drive motor 24 is fixedly arranged on the part of the fixed plate 29 located outside the collection box 21. The collection box 21 is provided with a clearance groove 30; the anti-retention rod 25 includes a first rod segment 31, a second rod segment 32, and a third rod segment 33 connected in sequence. The first rod segment 31 and the second rod segment 32 form an obtuse angle, and the second rod segment 32 and the third rod segment 33 form an acute angle. The distance from the connection between the second rod segment 32 and the third rod segment 33 to the filter 22 is smaller than the distance from the connection between the first rod segment 31 and the second rod segment 32 The distance from the connection to the filter 22, the third rod segment 33 extends and lengthens to both sides away from one end of the second rod segment 32; one end of the driving rod 26 is rotatably connected to the output shaft of the driving motor 24, and the other end is rotatably connected to one end of the first rod segment 31 away from the second rod segment 32; the fixed shaft 27 is arranged on the part of the fixed plate 29 located inside the collecting box 21, the fixed shaft 27 is parallel to the output shaft of the driving motor 24 and the vertical height is lower than the output shaft of the driving motor 24; one end of the control rod 28 is rotatably connected to the fixed shaft 27, and the other end is rotatably connected to the connection between the first rod segment 31 and the second rod segment 32.

[0066] The driving motor 24 is started, and the output shaft of the driving motor 24 rotates counterclockwise to drive the driving rod 26 to rotate, and the anti-retention rod 25 moves. The control rod 28 can only swing left and right, limiting the rotation of the anti-retention rod 25, so that the third rod section 33 moves from Figure 2 Underwater state picks up the collected dust suppression liquid 20, and then rotates straight asFigure 5 In this state, the connection between the second rod segment 32 and the third rod segment 33 impacts the filter screen 22, and then rotates straight as Figure 6 In this state, the third rod segment 33 splashes the lifted dust suppression liquid 20 onto the filter screen 22. Impacting the filter screen 22 can shake off the sand and gravel on the filter screen 22. Splashing the dust suppression liquid 20 onto the filter screen 22 can lift the sand and gravel or at least offset and weaken the pressure of the rotor assembly 4 throwing out the dust suppression liquid 20, further accelerating the sliding of the sand and gravel on the filter screen 22. And most of the dust suppression liquid 20 splashed onto the filter screen 22 after being lifted will fall back into the collection box 21 again.

[0067] A supplementary liquid inlet 34 is provided in the collection box 21. A first valve is provided at the supplementary liquid inlet 34. The supplementary liquid inlet 34 is connected to the first valve through a pipeline. A second valve is provided at the recovery port 23. A water level sensor is provided in the collection box 21. The water level sensor is connected to a controller. The controller is used to control the opening and closing of the two valves.

[0068] The recovery port 23 is normally open. When the water level sensor senses that the dust suppression liquid 20 in the collection box 21 is less than the preset value, the second valve is closed to close the recovery port 23, and the first valve is opened to supplement liquid into the collection box 21. When the water level sensor senses that the dust suppression liquid 20 in the collection box 21 is higher than the preset value, the first valve is closed.

[0069] The crushing method of the gravel crushing device includes the following steps:

[0070] S1: Feeding. The sand and gravel enter the inner cavity of the housing 1 from the feeding port 2.

[0071] S2: Crushing. The rotor assembly 4 rotates to crush the sand and gravel entering the inner cavity of the housing 1. The dust suppression device sprays the dust suppression liquid 20 into the housing 1 for dust suppression as the rotor assembly 4 rotates.

[0072] S3: Discharging. The sand and gravel are discharged from the discharging port 3. The collection assembly 19 collects the dust suppression liquid 20 on the side of the discharging port 3 away from the counterattack plate 5, and the anti-retention assembly works synchronously to accelerate the sliding of the sand and gravel on the filter screen 22.

[0073] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A dust suppression device for sand and gravel crushing, characterized in that The dust suppression device is arranged in a rotor assembly (4) in a sand and gravel crusher casing (1), the crusher includes a feed port (2) and a discharge port (3), and the dust suppression device is used to spray dust suppression liquid into the casing (1) as the rotor assembly (4) rotates; The rotor assembly (4) comprises: A central shaft (7), wherein the middle portion of the central shaft (7) is disposed in the inner cavity of the casing (1), and both ends of the central shaft (7) are rotatably disposed on the casing (1), and the central shaft (7) is connected to a crushing drive source and can rotate circumferentially; A sleeve (8), wherein the sleeve (8) is coaxially sleeved outside the central shaft (7) and fixedly connected to the central shaft (7); A fixed disk (9), the fixed disk (9) being coaxially sleeved outside the sleeve (8) and fixedly connected to the sleeve (8), a plurality of fixed disks (9) being provided along the length direction of the sleeve (8), and a plurality of connecting grooves (11) being uniformly distributed on the fixed disk (9) along the circumferential direction; A plate hammer (10), one end of which is disposed in the connecting groove (11) and fixedly connected to the connecting groove (11), and the other end of which is higher than the outer periphery of the fixed disk (9); The dust suppression device includes a liquid source arranged outside the housing (1), a liquid inlet channel (12) is opened in the central shaft (7) along the axial direction, one end of the liquid inlet channel (12) is closed and the other end is open, the liquid source is connected to the opening of the liquid inlet channel (12) and can infuse liquid into the liquid inlet channel (12), a plurality of liquid separation holes (13) penetrating the central shaft (7) are opened on the central shaft (7) along the circumferential direction, the liquid separation holes (13) are connected to the liquid inlet channel (12), a plurality of liquid outlet holes (14) penetrating the sleeve (8) are opened on the sleeve (8) along the circumferential direction, the liquid outlet holes (14) are provided on the wall of the sleeve (8) between two adjacent fixed disks (9), an annular groove (15) concentric with the axis of the sleeve (8) is opened in the sleeve (8) along the length direction, and a liquid absorbent cotton (16) is fixedly arranged in the annular groove (15).

2. A dust suppression device for sand and gravel crushing according to claim 1, characterized in that: The liquid-absorbing cotton (16) is annular in shape, and a plurality of positioning pieces (17) are provided circumferentially on the liquid-absorbing cotton (16). Positioning grooves (18) adapted to the positioning pieces (17) are provided on the wall of the annular groove (15).

3. A dust suppression device for sand and gravel crushing according to claim 1, characterized in that: A collecting assembly (19) is provided on a side of the discharge port (3) away from the impact plate (5) in the housing (1), and the collecting assembly (19) is used to collect dust suppression liquid (20).

4. A dust suppression device for sand and stone crushing according to claim 3, characterized in that: The collecting assembly (19) comprises: A collection box (21), wherein the top of the collection box (21) is inclined and open, the bottom of the collection box (21) is also inclined, and a recovery port (23) is provided at the lowest point of the bottom; A filter screen (22) is provided with an inclined fixed cover at the top opening of the collection box (21).

5. A dust suppression device for sand and stone crushing according to claim 4, characterized in that: The collecting assembly (19) further comprises an anti-retention assembly, which is used to accelerate the sliding of sand and gravel on the filter screen (22).

6. A dust suppression device for sand and stone crushing according to claim 5, characterized in that: The anti-retention component includes: A drive motor (24), a fixed plate (29) is fixedly arranged on the side of the collection box (21) and a portion of the fixed plate (29) is located inside the collection box (21), the drive motor (24) is fixedly arranged on the portion of the fixed plate (29) located outside the collection box (21), and a clearance groove (30) is provided on the collection box (21); An anti-retention rod (25), the anti-retention rod (25) comprising a first rod segment (31), a second rod segment (32) and a third rod segment (33) connected in sequence, an obtuse angle being formed between the first rod segment (31) and the second rod segment (32), an acute angle being formed between the second rod segment (32) and the third rod segment (33), a distance from a connection point between the second rod segment (32) and the third rod segment (33) to the filter screen (22) being smaller than a distance from a connection point between the first rod segment (31) and the second rod segment (32) to the filter screen (22), and the third rod segment (33) extending and lengthening toward both sides away from one end of the second rod segment (32); A driving rod (26), one end of the driving rod (26) being rotatably connected to the output shaft of the driving motor (24), and the other end being rotatably connected to an end of the first rod section (31) away from the second rod section (32); a fixed shaft (27), the fixed shaft (27) being arranged on a portion of the fixed plate (29) located inside the collecting box (21), the fixed shaft (27) being parallel to the output shaft of the drive motor (24) and having a vertical height lower than the output shaft of the drive motor (24); A control rod (28), one end of which is rotatably connected to the fixed shaft (27), and the other end of which is rotatably connected to the connection between the first rod segment (31) and the second rod segment (32).

7. A dust suppression device for sand and stone crushing according to claim 6, characterized in that: The collecting box (21) is provided with a supplementary liquid inlet (34), a first valve is provided at the supplementary liquid inlet (34), the supplementary liquid inlet (34) is connected to the first valve via a pipeline, a second valve is provided at the recovery port (23), a water level sensor is provided in the collecting box (21), the water level sensor is connected to a controller, and the controller is used to control the opening and closing of the two valves.

Images