Dust suppression spraying device for sand and gravel processing

Abstract

This invention relates to the field of spray device technology, specifically a dust suppression spray device for sand and gravel processing, comprising a side wall support plate, a top cover plate, a baffle plate, an arched section, an inclined guide plate, a mating sealing plate, and a material-pushing spray plate. The top cover plate, the baffle plate, the arched section, the inclined guide plate, and the mating sealing plate are all fixedly installed on both sides of the side wall support plate. The top cover plate is arranged parallel to each other, the baffle plate is inclined, and the inclined upper edge of the baffle plate is fixedly connected to the top cover plate. The arched section bulges upward, and one side of it is fixedly connected to the inclined lower edge of the baffle plate. This dust suppression spray device, through its air curtain structure, forms a tubular wind tunnel outside the downward-spraying annular water mist from the spray water ring. When sand and gravel fall, the water mist surrounding the sand and gravel becomes more concentrated, while also increasing the windproof effect of the spray device.

Description

Technical Field

[0001] This invention relates to the field of spray device technology, specifically a dust suppression spray device for sand and gravel processing. Background Technology

[0002] In rock quarries, rocks are often blasted and processed into sand and gravel. When the sand and gravel are piled up, they are transported by conveyor belts, causing them to fall from a height and naturally accumulate. This process generates a large amount of dust, severely degrading the air quality on site and potentially harming the health of workers. Existing dust suppression spraying devices, such as the sand and gravel stockpile dust suppression spray system disclosed in Chinese Patent CN113753621A, employ the following technical solution: the spraying device includes pipes and a frame. The frame includes two sets of arc-shaped circular pipes and straight pipes that are connected to the upper and lower sets of circular pipes. The pipes are connected to the frame, and each set of circular pipes and straight pipes is connected to several sets of nozzles facing the center of the circular pipes. A water tank is filled with water, and a water pump is installed on the water tank, with the water pump connected to the pipes.

[0003] In the aforementioned existing technical solutions, dust suppression spraying is achieved by spraying water downwards from the outside of the falling sand and gravel to form a tubular water mist that surrounds the sand and gravel. However, in actual mining environments, due to the lack of shielding, there is often interference from cross-blowing airflow. The sand and gravel particles are relatively large and are not affected by wind, but the sprayed water mist is easily blown off course by the airflow, resulting in a decrease in dust suppression effect. Summary of the Invention

[0004] The purpose of this invention is to provide a dust suppression spray device for sand and gravel processing, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dust suppression spray device for sand and gravel processing, comprising a side wall support plate, a top cover plate, a baffle plate, an arched portion, an inclined guide plate, a mating sealing plate, and a material-discharging spray plate. The two side surfaces of the top cover plate, the baffle plate, the arched portion, the inclined guide plate, and the mating sealing plate are all fixedly installed to the side wall support plate. The top cover plate is arranged parallel to each other. The baffle plate is inclined, and its inclined upper edge is fixedly connected to the top cover plate. The arched portion protrudes upwards, and one side is fixedly connected to the inclined lower edge of the baffle plate, while the other side is fixedly connected to the upper edge of the inclined guide plate. The inclined guide plate and the baffle plate have opposite inclination angles. The mating sealing plate is located below the baffle plate, and the material-pushing spray plate is positioned above the mating sealing plate. The material-pushing spray plate is located on the side near the inclined guide plate and can swing up and down rapidly. A spray structure is provided below the side wall support plate, and an air curtain structure is fixedly fitted on the outside of the spray structure. A connecting structure with a drainage function is provided between the spray structure and the air curtain structure. The material-pushing spray plate is equipped with a spray structure, which enables the material-pushing spray plate to spray water mist on the side near the inclined guide plate and simultaneously provides non-contact cooling for the material-pushing spray plate. The baffle plate is equipped with a parallel jet structure with dust separation function, which enables positive pressure above the material-pushing spray plate.

[0006] The spray structure includes a connecting support rod, a spray water ring, a spray nozzle, and a pressure inlet pipe.

[0007] The spray water ring is installed and fixed to the inclined guide plate and the sealing plate respectively by connecting support rods. The spray water ring is circular and has a cavity inside. The spray nozzles are uniformly fixed and connected to the lower surface of the spray water ring in a circumferential array. The spray water ring is fixedly connected to the outside by a pressure inlet pipe.

[0008] The air curtain structure includes a right-angle frame, a uniform air ring, a jet slit ring, and an air ring inlet pipe. The right-angle frame is fixedly installed on the outer surface of the spray water ring. The uniform air ring is fixedly installed to the spray water ring via the right-angle frame. The uniform air ring and the spray water ring are fixedly coaxially, and the diameter of the uniform air ring is larger than the diameter of the spray water ring. The lower part of the uniform air ring is fixedly connected to the jet slit ring, which is circular. The outer part of the uniform air ring is fixedly connected to the air ring inlet pipe.

[0009] The connecting structure includes an air supply pipe, an electrically controlled air valve, a one-way retaining ring, a rubber ball, a spring bracket, and a return spring.

[0010] One end of the air supply pipe is fixedly connected to the spray water ring, and the other end is fixedly connected to the uniform air ring. An electrically controlled air valve is fixedly installed inside the air supply pipe. A one-way baffle ring is fixedly installed inside the pressure inlet pipe. A rubber ball is movably installed on the side of the one-way baffle ring near the spray water ring. A spring bracket is fixedly installed on the inner wall surface of the pressure inlet pipe, on the side of the rubber ball near the spray water ring. A return spring is connected between the spring bracket and the rubber ball.

[0011] The spray structure includes a connecting water chamber, branch water channels, atomizing grooves, atomizing nozzles, a spray plate inlet pipe, flexible water pipes, and water ring branch pipes.

[0012] The connecting water cavity, the branch water channels, and the atomizing groove are all located inside the material-dispensing spray plate. One end of the branch water channel is connected to the connecting water cavity, and the other end of the branch water channel is individually connected to the atomizing groove. The branch water channels are arranged in a parallel array inside the material-dispensing spray plate. An atomizing nozzle is fixedly installed inside the atomizing groove. A spray plate liquid inlet pipe is fixedly connected to the outer surface of the material-dispensing spray plate. One end of the spray plate liquid inlet pipe is connected to the connecting water cavity, and the other end of the spray plate liquid inlet pipe is fixedly connected to a flexible water pipe. The other end of the flexible water pipe is fixedly connected to a water ring branch pipe, and the water ring branch pipe is fixedly connected to the outer surface of the spray water ring.

[0013] The parallel jet structure includes a parallel jet seat, a jet transverse groove, sand-blocking cotton, an air chamber plate, a high-pressure air supply pipe, a high-pressure branch pipe, and an air ring connecting pipe. The parallel jet seat is fixedly installed on the lower surface of the baffle plate. The jet transverse groove is opened through the interior of the parallel jet seat. Sand-blocking cotton is attached and fixed above the jet transverse groove. An air chamber plate is fixedly installed on the upper surface of the baffle plate. The air chamber plate is fixedly connected to the high-pressure air supply pipe and to the upper part of the jet transverse groove. A high-pressure branch pipe is fixedly connected to the outer surface of the high-pressure air supply pipe. An air ring connecting pipe is fixedly connected to the other end of the high-pressure branch pipe and to the other end of the air ring connecting pipe.

[0014] A mounting nail plate is fixedly installed on the surface of the side wall support plate. A rotating shaft hole and a drive shaft hole are opened on the surface of the side wall support plate. A rotating shaft is fixedly installed on the side of the material-dispensing spray plate away from the inclined guide plate. The rotating shaft passes through the rotating shaft hole. A cam shaft is rotatably installed below the material-dispensing spray plate. The cam shaft passes through the drive shaft hole. A toggle cam is fixedly installed on the surface of the cam shaft. The lower surface of the material-dispensing spray plate is in pressure contact with the toggle cam. A holding seat is fixedly installed on the inner wall surface of the side wall support plate. A quick-release spring is connected between the upper surface of the holding seat and the lower surface of the material-dispensing spray plate. The quick-release spring is in a stretched state.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The dust suppression spray device of the present invention, through the setting of an air curtain structure, can form a tubular wind tunnel outside the downward spraying of annular water mist from the spray water ring. When sand and gravel fall, the water mist surrounding the sand and gravel can be more concentrated, and the windproof effect of the spray device is increased. By using the downward spraying air curtain, the interference of lateral side blowing on the water mist is weakened, and the separation of water mist from falling sand and gravel is prevented.

[0017] Through the designed connecting structure, when the spray nozzles or atomizing nozzles are blocked by scale or dust, the high-pressure airflow in the uniform air ring is injected into the spray water ring, and the pressure in the spray water ring increases, which opens the spray nozzles or atomizing nozzles, giving the spray nozzles or atomizing nozzles an automatic unblocking capability.

[0018] By rapidly swinging the material-dispensing spray plate up and down, the sand and gravel falling on its surface are lifted up. During this process, the parallel jet structure blows out airflow, causing the sand and gravel particles to be swept downwards by the airflow as they are lifted up. This separates the dust from the sand and gravel, and both are thrown together into the arched part. As the inclined guide plate slides down, the material-dispensing spray plate swings up and down multiple times, causing the atomized nozzles to repeatedly sweep across the dust and sand and gravel surfaces, causing the dust to clump together and further reducing dust generation during the fall. In addition, it provides a double protection when the air curtain structure fails due to strong winds, effectively suppressing dust generation.

[0019] The upper surface of the material-dispensing spray plate is difficult to coat with anti-rust paint due to frequent friction with sand and gravel. The parallel air jet structure keeps the top of the material-dispensing spray plate under positive pressure, which effectively prevents water mist from the atomizing nozzle from falling onto the upper surface of the material-dispensing spray plate, thus greatly delaying the corrosion of the material-dispensing spray plate. In addition, the material-dispensing spray plate has branch water channels inside, which can fully cool the material-dispensing spray plate and prevent it from overheating during frequent friction with sand and gravel, thereby greatly extending the service life of the material-dispensing spray plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure from another perspective of the present invention.

[0022] Figure 3 This is the front view of the present invention.

[0023] Figure 4 for Figure 3 Cross-sectional view at point AA.

[0024] Figure 5 for Figure 4 Enlarged schematic diagram of region A in the middle.

[0025] Figure 6 This is a three-dimensional half-sectional schematic diagram of the present invention.

[0026] Figure 7 for Figure 6 Enlarged schematic diagram of region B in the middle.

[0027] Figure 8 This is a three-dimensional half-section front view of the present invention.

[0028] Figure 9 for Figure 8 Enlarged schematic diagram of region C in the middle.

[0029] Figure 10 This is a schematic diagram of the invention from another angle, showing a three-dimensional half-section.

[0030] In the diagram: 1. Side wall support plate; 2. Top cover plate; 3. Material baffle plate; 4. Arched section; 5. Inclined guide plate; 6. Matching sealing plate; 7. Material ejector spray plate; 601. Connecting support rod; 602. Spray water ring; 603. Spray nozzle; 604. Pressure inlet pipe; 605. Right angle frame; 606. Uniform air ring; 607. Air jet gap ring; 608. Air ring inlet pipe; 609. Air delivery pipe; 610. Electrically controlled air valve; 611. One-way retaining ring; 612. Rubber ball; 613. Spring bracket; 614. Return spring; 701. Connecting water chamber; 702. Branch path Waterway; 703, Atomizing groove; 704, Atomizing nozzle; 705, Spray plate liquid inlet pipe; 706, Flexible water pipe; 707, Water ring branch pipe; 301, Parallel jet seat; 302, Jet cross groove; 303, Sand baffle cotton; 304, Air chamber empty plate; 305, High-pressure air supply pipe; 306, High-pressure branch pipe; 307, Air ring connecting pipe; 101, Mounting nail plate; 102, Rotary shaft hole; 103, Drive shaft hole; 708, Rotating shaft; 709, Camshaft; 710, Actuating cam; 711, Holding seat; 712, Quick tension spring; 8, Sand and gravel conveyor belt. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 10This invention provides a technical solution: a dust suppression spray device for sand and gravel processing, comprising a side wall support plate 1, an upper cover plate 2, a baffle plate 3, an arched portion 4, an inclined guide plate 5, a mating sealing plate 6, and a material-discharging spray plate 7. The upper cover plate 2, the baffle plate 3, the arched portion 4, the inclined guide plate 5, and the mating sealing plate 6 are all fixedly installed on both sides of the side wall support plate 1. The upper cover plate 2 is arranged parallel to each other. The baffle plate 3 is inclined, and its inclined upper edge is fixedly connected to the upper cover plate 2. The arched portion 4 protrudes upwards, and one side is fixedly connected to the inclined lower edge of the baffle plate 3, while the other side is fixedly connected to the upper edge of the inclined guide plate 5. The inclined guide plate 5 and the baffle plate 3 are inclined at similar angles. Conversely, the sealing plate 6 is located below the baffle plate 3, and the material-pushing spray plate 7 is located above the sealing plate 6. The material-pushing spray plate 7 is located on the side near the inclined guide plate 5 and can swing up and down quickly. A spray structure is provided below the side wall support plate 1. An air curtain structure is fixedly fitted on the outside of the spray structure. A connecting structure with a drainage function is provided between the spray structure and the air curtain structure. The material-pushing spray plate 7 is provided with a spray structure. The spray structure can spray water mist from the side of the material-pushing spray plate 7 near the inclined guide plate 5 and can also cool the material-pushing spray plate 7 without contact. The baffle plate 3 is provided with a parallel jet structure with dust separation function. The parallel jet structure can create positive pressure above the material-pushing spray plate 7.

[0033] The spray structure includes a connecting support rod 601, a spray water ring 602, a spray nozzle 603, and a pressure inlet pipe 604.

[0034] The spray water ring 602 is installed and fixed to the inclined guide plate 5 and the sealing plate 6 respectively by the connecting support rod 601. The spray water ring 602 is circular and has a cavity inside. The spray nozzles 603 are uniformly fixed and connected to the lower surface of the spray water ring 602 in a circumferential array. The spray water ring 602 is fixedly connected to the outside by a pressure inlet pipe 604.

[0035] The air curtain structure includes a right-angle frame 605, a uniform air ring 606, a jet slit ring 607, and an air ring inlet pipe 608. The right-angle frame 605 is fixedly installed on the outer surface of the spray water ring 602. The uniform air ring 606 is fixedly installed to the spray water ring 602 through the right-angle frame 605. The uniform air ring 606 and the spray water ring 602 are fixedly coaxially fixed, and the diameter of the uniform air ring 606 is larger than the diameter of the spray water ring 602. The lower part of the uniform air ring 606 is fixedly connected to the jet slit ring 607, which is circular. The outer part of the uniform air ring 606 is fixedly connected to the air ring inlet pipe 608.

[0036] The connecting structure includes an air supply pipe 609, an electrically controlled air valve 610, a one-way retaining ring 611, a rubber ball 612, a spring bracket 613, and a return spring 614.

[0037] One end of the air supply pipe 609 is fixedly connected to the spray water ring 602, and the other end is fixedly connected to the uniform air ring 606. An electrically controlled air valve 610 is fixedly installed inside the air supply pipe 609. A one-way retaining ring 611 is fixedly installed inside the pressure inlet pipe 604. A rubber ball 612 is movably installed on the side of the one-way retaining ring 611 near the spray water ring 602. A spring bracket 613 is fixedly installed on the inner wall surface of the pressure inlet pipe 604, on the side of the rubber ball 612 near the spray water ring 602. A return spring 614 is connected between the spring bracket 613 and the rubber ball 612.

[0038] The spray structure includes a connecting water chamber 701, a branch water channel 702, an atomizing groove 703, an atomizing nozzle 704, a spray plate inlet pipe 705, a flexible water pipe 706, and a water ring branch pipe 707.

[0039] The connecting water cavity 701, branch water channels 702, and atomizing groove 703 are all located inside the material-dispensing spray plate 7. One end of the branch water channel 702 is connected to the connecting water cavity 701, and the other end of the branch water channel 702 is individually connected to the atomizing groove 703. The branch water channels 702 are arranged in an array in parallel inside the material-dispensing spray plate 7. An atomizing nozzle 704 is fixedly installed inside the atomizing groove 703. A spray plate liquid inlet pipe 705 is fixedly connected to the outer surface of the material-dispensing spray plate 7. One end of the spray plate liquid inlet pipe 705 is connected to the connecting water cavity 701, and the other end of the spray plate liquid inlet pipe 705 is fixedly connected to the flexible water pipe 706. The other end of the flexible water pipe 706 is fixedly connected to the water ring branch pipe 707. The water ring branch pipe 707 is fixedly connected to the outer surface of the spray water ring 602.

[0040] The parallel jet structure includes a parallel jet seat 301, a jet transverse groove 302, sand-blocking cotton 303, an air chamber plate 304, a high-pressure air supply pipe 305, a high-pressure branch pipe 306, and an air ring connecting pipe 307. The parallel jet seat 301 is fixedly installed on the lower surface of the baffle plate 3. The jet transverse groove 302 is formed through the interior of the parallel jet seat 301. The jet transverse groove 302 is a flat and elongated slit, which can greatly weaken and block the impact of sand and gravel on the sand-blocking cotton 303, extending the service life of the sand-blocking cotton 303. The sand-blocking cotton 303 can filter and block fine splashing sand particles. The jet transverse groove 304... A sand-blocking cotton 303 is fixedly attached above 02. An air chamber plate 304 is fixedly installed on the upper surface of the baffle plate 3. The air chamber plate 304 is fixedly connected to the high-pressure air supply pipe 305. The air chamber plate 304 is connected to the upper part of the jet transverse groove 302. A high-pressure branch pipe 306 is fixedly connected to the outer surface of the high-pressure air supply pipe 305. An air ring connecting pipe 307 is fixedly connected to the other end of the high-pressure branch pipe 306. The other end of the air ring connecting pipe 307 is fixedly connected to the air ring inlet pipe 608. The gas pressure input into the high-pressure air supply pipe 305 is greater than the liquid pressure in the pressure liquid inlet pipe 604.

[0041] A mounting plate 101 is fixedly installed on the surface of the side wall support plate 1. A rotating shaft hole 102 and a drive shaft hole 103 are opened on the surface of the side wall support plate 1. A rotating shaft 708 is fixedly installed on the side of the material-dispensing spray plate 7 away from the inclined guide plate 5. The rotating shaft 708 passes through the rotating shaft hole 102. A cam shaft 709 is rotatably installed below the material-dispensing spray plate 7. The cam shaft 709 passes through the drive shaft hole 103. The cam shaft 709 is driven to rotate by a motor in actual operation. A toggle cam 710 is fixedly installed on the surface of the cam shaft 709. The lower surface of the material-dispensing spray plate 7 is in pressure contact with the toggle cam 710. A holding seat 711 is fixedly installed on the inner wall surface of the side wall support plate 1. A quick-release spring 712 is connected between the upper surface of the holding seat 711 and the lower surface of the material-dispensing spray plate 7. The quick-release spring 712 is in a stretched state.

[0042] In use, the device is installed and fixed to the sand and gravel conveyor belt 8 by mounting nail plate 101, as follows: Figure 1 As shown, the high-pressure gas pipeline 305 is connected to an external high-pressure gas source through a pipe, and the pressure liquid inlet pipe 604 is connected to an external water pump through a water pipe.

[0043] The camshaft 709 drives the actuating cam 710 to rotate, which intermittently squeezes the material ejector plate 7. The material ejector plate 7 then quickly returns to its original position under the elastic force of the fast tension spring 712, thereby causing the material ejector plate 7 to swing up and down rapidly.

[0044] The sand and gravel conveyed by the sand and gravel conveyor belt 8 falls onto the upper surface of the material-dispensing spray plate 7, lifting the sand and gravel above the material-dispensing spray plate 7. At this time, airflow is sprayed downward from the air jet trough 302. The sand and gravel particles are subjected to the downward scouring airflow during the lifting process, which separates the dust on the surface of the sand and gravel from the sand and gravel. This facilitates the agglomeration of dust in the subsequent spraying process. As the material-dispensing spray plate 7 swings, the dust and sand and gravel are thrown into the arched part 4 and slide down with the inclined guide plate 5. During this process, the material-dispensing spray plate 7 swings up and down many times, so that the mist sprayed from the atomizing nozzle 704 sweeps the surface of dust and sand and gravel repeatedly, causing the dust to agglomerate and further reducing the dust generation of sand and gravel during the falling process.

[0045] Due to frequent friction with sand and gravel, the anti-rust paint applied to the upper surface of the material-dispensing spray plate 7 is difficult to retain under the friction of the sand and gravel. However, the downward airflow from the air jet channel 302 creates a positive pressure state above the material-dispensing spray plate 7, making it difficult for the water mist in the atomizing nozzle 704 to drift to the upper surface of the material-dispensing spray plate 7, thus preventing rust on the upper surface of the material-dispensing spray plate 7. Furthermore, the material-dispensing spray plate 7 is equipped with branch water channels 702, which can effectively cool the material-dispensing spray plate 7, preventing it from overheating and aggravating wear during frequent friction with sand and gravel, thereby greatly extending the service life of the material-dispensing spray plate 7.

[0046] The spray water ring 602 sprays water mist downward through the spray nozzle 603, which falls into a tube shape and is fitted over the outside of the inclined guide plate 5 as the sand and gravel slide down, preventing dust from escaping. The air jet gap ring 607 is circular and sprays a downward circular tube-shaped air curtain, which wraps the water mist and sand and gravel inside, making the water mist more concentrated and less likely to drift outward. In addition, when there is a horizontal airflow, the vertically downward air curtain can form a certain blocking and shielding effect on the horizontal airflow, weakening the impact of the airflow on the water mist and preventing the water mist from being blown away by the airflow and separated from the sand and gravel.

[0047] When the atomizing nozzle 704 and the spray nozzle 603 become clogged, the electrically controlled air valve 610 opens, allowing the high-pressure airflow in the uniform air ring 606 to enter the spray water ring 602, rapidly increasing the internal pressure of the spray water ring 602, thereby clearing the clogged atomizing nozzle 704 and the spray nozzle 603, giving the atomizing nozzle 704 and the spray nozzle 603 an automatic unblocking capability. When the pressure in the spray water ring 602 increases, the rubber ball 612 and the one-way baffle ring 611 work together to automatically close the pressure inlet pipe 604, preventing water from flowing back through the pressure inlet pipe 604. The electrically controlled air valve 610 automatically resets after closing.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust suppression spraying device for sand and gravel processing, comprising a side wall support plate (1), an upper cover plate (2), a baffle plate (3), an arched section (4), an inclined guide plate (5), a sealing plate (6), and a material-discharging spray plate (7), characterized in that: The upper cover plate (2), the baffle plate (3), the arched portion (4), the inclined guide plate (5), and the mating sealing plate (6) are all fixedly installed on both sides of the side wall support plate (1). The upper cover plate (2) is arranged parallel to each other. The baffle plate (3) is inclined, and the inclined upper edge of the baffle plate (3) is fixedly connected to the upper cover plate (2). The arched portion (4) is raised upward, and one side is fixedly connected to the inclined lower edge of the baffle plate (3), and the other side is fixedly connected to the upper edge of the inclined guide plate (5). The inclined guide plate (5) and the baffle plate (3) are inclined at opposite angles. The mating sealing plate (6) is located below the baffle plate (3). The material ejector plate (7) is also fixedly connected to the material ejector plate (7). Set above the sealing plate (6), the material-dispensing spray plate (7) is close to the inclined guide plate (5) and can swing up and down quickly. A spray structure is set below the side wall support plate (1). An air curtain structure is fixedly sleeved on the outside of the spray structure. A connecting structure with a clearing function is set between the spray structure and the air curtain structure. The material-dispensing spray plate (7) is equipped with a spray structure. The spray structure can spray water mist from the side of the material-dispensing spray plate (7) close to the inclined guide plate (5) and can cool the material-dispensing spray plate (7) without contact. The baffle plate (3) is equipped with a parallel jet structure with dust separation function. The parallel jet structure can make the material-dispensing spray plate (7) have positive pressure.

2. The dust suppression spray device for sand and gravel processing according to claim 1, characterized in that: The spray structure includes a connecting support rod (601), a spray water ring (602), a spray nozzle (603), and a pressure inlet pipe (604).

3. The dust suppression spray device for sand and gravel processing according to claim 2, characterized in that: The spray water ring (602) is installed and fixed to the inclined guide plate (5) and the sealing plate (6) respectively by the connecting support rod (601). The spray water ring (602) is circular and has a cavity inside. The spray nozzles (603) are uniformly fixed and connected to the lower surface of the spray water ring (602) in a circumferential array. The spray water ring (602) is fixedly connected to the outside of the pressure inlet pipe (604).

4. The dust suppression spray device for sand and gravel processing according to claim 2, characterized in that: The air curtain structure includes a right-angle frame (605), a uniform air ring (606), a jet slit ring (607), and an air ring inlet pipe (608). The right-angle frame (605) is fixedly installed on the outer surface of the spray water ring (602). The uniform air ring (606) is fixedly installed to the spray water ring (602) through the right-angle frame (605). The uniform air ring (606) and the spray water ring (602) are fixedly coaxially fixed, and the diameter of the uniform air ring (606) is larger than the diameter of the spray water ring (602). The lower part of the uniform air ring (606) is fixedly connected to the jet slit ring (607), which is circular. The outer part of the uniform air ring (606) is fixedly connected to the air ring inlet pipe (608).

5. The dust suppression spray device for sand and gravel processing according to claim 4, characterized in that: The communication structure includes an air supply pipe (609), an electrically controlled air valve (610), a one-way retaining ring (611), a rubber ball (612), a spring bracket (613), and a return spring (614).

6. The dust suppression spray device for sand and gravel processing according to claim 5, characterized in that: One end of the air supply pipe (609) is fixedly connected to the spray water ring (602), and the other end is fixedly connected to the uniform air ring (606). An electrically controlled air valve (610) is fixedly installed inside the air supply pipe (609). A one-way retaining ring (611) is fixedly installed inside the pressure inlet pipe (604). A rubber ball (612) is movably installed on the side of the one-way retaining ring (611) near the spray water ring (602). A spring bracket (613) is fixedly installed on the inner wall surface of the pressure inlet pipe (604) on the side of the rubber ball (612) near the spray water ring (602). A return spring (614) is connected between the spring bracket (613) and the rubber ball (612).

7. The dust suppression spray device for sand and gravel processing according to claim 2, characterized in that: The spray structure includes a connecting water chamber (701), a branch water channel (702), an atomizing groove (703), an atomizing nozzle (704), a spray plate inlet pipe (705), a flexible water pipe (706), and a water ring branch pipe (707).

8. The dust suppression spray device for sand and gravel processing according to claim 7, characterized in that: The connecting water cavity (701), the branch water channel (702), and the atomizing groove (703) are all located inside the material-dispensing spray plate (7). One end of the branch water channel (702) is connected to the connecting water cavity (701), and the other end of the branch water channel (702) is connected to the atomizing groove (703) separately. The branch water channels (702) are arranged in a parallel array inside the material-dispensing spray plate (7). An atomizing nozzle is fixedly installed inside the atomizing groove (703). (704) A spray plate inlet pipe (705) is fixedly connected to the outer surface of the material-dispensing spray plate (7). One end of the spray plate inlet pipe (705) is connected to the water cavity (701), and the other end of the spray plate inlet pipe (705) is fixedly connected to the flexible water pipe (706). The other end of the flexible water pipe (706) is fixedly connected to the water ring branch pipe (707). The water ring branch pipe (707) is fixedly connected to the outer surface of the spray water ring (602).

9. The dust suppression spray device for sand and gravel processing according to claim 4, characterized in that: The parallel jet structure includes a parallel jet seat (301), a jet transverse groove (302), sand-blocking cotton (303), an air chamber plate (304), a high-pressure air supply pipe (305), a high-pressure branch pipe (306), and an air ring connecting pipe (307). The parallel jet seat (301) is fixedly installed on the lower surface of the baffle plate (3). The jet transverse groove (302) is opened through the interior of the parallel jet seat (301). Sand-blocking cotton (303) is attached and fixed above the jet transverse groove (302). The baffle plate (304) is... An air cavity plate (304) is fixedly installed on the upper surface of the air cavity plate (304), which is fixedly connected to the high-pressure air supply pipe (305). The air cavity plate (304) is connected to the upper part of the jet transverse groove (302). A high-pressure branch pipe (306) is fixedly connected to the outer surface of the high-pressure air supply pipe (305). An air ring connecting pipe (307) is fixedly connected to the other end of the high-pressure branch pipe (306). The other end of the air ring connecting pipe (307) is fixedly connected to the air ring inlet pipe (608).

10. The dust suppression spray device for sand and gravel processing according to claim 1, characterized in that: A mounting plate (101) is fixedly provided on the surface of the side wall support plate (1). A rotating shaft hole (102) and a drive shaft hole (103) are opened on the surface of the side wall support plate (1). A rotating shaft (708) is fixedly provided on the side of the material ejector plate (7) away from the inclined guide plate (5). The rotating shaft (708) passes through the rotating shaft hole (102). A camshaft (709) is rotatably provided below the material ejector plate (7). The camshaft (709) passes through... A toggle cam (710) is fixedly provided on the surface of the camshaft (709) through the drive shaft hole (103). The lower surface of the material spraying plate (7) is pressed against the toggle cam (710). A holding seat (711) is fixedly provided on the inner wall surface of the side wall support plate (1). A quick tension spring (712) is connected between the upper surface of the holding seat (711) and the lower surface of the material spraying plate (7). The quick tension spring (712) is in a stretched state.

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