Area dust suppression devices in aggregate production plants

Abstract

This invention discloses a regional dust suppression device for aggregate production plants, specifically relating to the field of dust suppression technology. The device includes a nozzle, multiple sets of stepped holes, multiple atomizing holes, a bottom pipe, and multiple sets of bottom-angled holes. The stepped holes are all located on the outer wall of the nozzle, with multiple atomizing holes located above them. The bottom pipe is fixedly connected to the bottom end of the nozzle, and multiple sets of bottom-angled holes are located at the bottom end of the bottom pipe. This invention achieves the simultaneous opening of multiple top-angled holes, multiple sets of middle stepped holes, and multiple sets of bottom-angled holes. This linkage replaces the cumbersome process of operating multiple switches separately in the traditional method, allowing for timely and dynamic adjustment of dust suppression measures and significantly improving the dynamic dust suppression effect. This solves the problem of difficulty in achieving multi-layered dust suppression at different locations simultaneously, and the difficulty in timely and dynamic adjustment of dust suppression measures when facing abnormally large increases in dust levels, resulting in poor dust suppression effects.

Description

Technical Field

[0001] This invention relates to the field of dust suppression technology, and more specifically, to a regional dust suppression device for aggregate production plants. Background Technology

[0002] Implementing regional dust suppression measures in aggregate production plants can improve the working environment and ensure production safety. Dust accumulation to a certain extent can cause explosions, posing a higher risk of explosion. Regional dust suppression measures utilize water atomization to fully contact dust particles, thereby effectively reducing dust concentration and preventing dust accumulation.

[0003] Among existing publicly available documents, patent publication number CN210699326U discloses an automatic area dust suppression device for aggregate production plants. This technology achieves the purpose of positioning and installing nozzles, solving the problems of existing automatic area dust suppression devices in aggregate production plants that use bolts to fasten the nozzles to the brackets. Because there are only one bolt, the nozzle is prone to deflection during use, and installation and disassembly are time-consuming and labor-intensive. This automatic area dust suppression device for aggregate production plants has the advantage of convenient nozzle installation. However, this technology has the following problems.

[0004] Dust is generated during aggregate processing in aggregate production plants. Water atomization is commonly used for dust suppression and separation. However, when the amount of dust surges abnormally, a single layer of atomized water coverage is insufficient to effectively control the dust. Dust can easily break through the atomization layer and spread outwards instantly. At this time, personnel need to open the top, outside, and bottom nozzles. However, in actual operation, it is difficult to adjust the top, outside, and bottom nozzles simultaneously because the switches at different locations need to be operated separately. It is also difficult to achieve multi-stage layer coverage for dust suppression at different locations within the same time. When faced with an abnormal surge in dust, it is difficult to dynamically adjust the dust suppression measures in a timely manner, resulting in poor dust suppression effect. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides the following technical solution: a regional dust suppression device for an aggregate production plant, comprising a nozzle, and further comprising:

[0006] Multiple sets of stepped holes are provided on the outer wall of the nozzle, and multiple atomizing holes are provided above the stepped holes;

[0007] The bottom tube is fixedly connected to the bottom end of the nozzle, and the bottom end of the bottom tube has multiple sets of bottom oblique holes;

[0008] Multiple angled holes are all angled and opened at the top of the nozzle;

[0009] The linkage shaft is installed inside the nozzle, and the outer wall of the linkage shaft is equipped with external stepped dust collection components.

[0010] The rope is installed on the external step dust suppression device, and the bottom end of the rope is equipped with a bottom dust suppression device;

[0011] The top dust collection component is located at the top of the linkage shaft;

[0012] The power unit is installed at the bottom of the linkage shaft;

[0013] When the amount of aggregate dust surges abnormally, the power unit drives the linkage shaft to move downward. At the same time, the linkage shaft drives the external stepped dust suppression component to rotate to open multiple sets of stepped holes to achieve middle stepped dust suppression. Simultaneously, the external stepped dust suppression component pulls the rope to drive the bottom dust suppression component to open multiple sets of bottom inclined holes to achieve bottom dust suppression. At the same time, the linkage shaft drives the top dust suppression component to move downward to open multiple top inclined holes to form a top dust suppression area.

[0014] In a preferred embodiment, the external stepped dust collection component includes:

[0015] A sleeve is fixed to the outer wall of the linkage shaft, and multiple arc-shaped strips are fixed on the lower surface of the sleeve;

[0016] An oblique arc surface is formed at the bottom end of the arc strip. A rotating sleeve is slidably installed on the outer wall of the arc strip, and the rotating sleeve is fixedly connected to the top end of the rope. Multiple arc grooves are formed on the upper surface of the rotating sleeve, and the arc strip is slidably connected to the rotating sleeve to which the arc groove belongs.

[0017] Multiple sliders slide on the inner wall of the rotating sleeve, and the multiple sliders are fixedly connected to the nozzle. A spring is installed between the slider and the rotating sleeve, and the spring is used to provide elastic force to the rotating sleeve.

[0018] Multiple linkage bars are fixed to the outer wall of the rotating sleeve, and a sealing strip is fixed to one side of each linkage bar, and the sealing strip is in contact with the nozzle.

[0019] A stepped orifice plate is installed on the outside of the stepped holes. Multiple stepped orifice plates are fixedly connected to the nozzle. The number of stepped holes in each group is set to multiple, and the length of the multiple stepped holes decreases sequentially from top to bottom.

[0020] In a preferred embodiment, the cross-sectional shape of the arc-shaped strip is circular arc-shaped, and a plurality of the arc-shaped strips are arranged in a circumferential distribution.

[0021] In a preferred embodiment, multiple stepped perforated plates are respectively configured to correspond one-to-one with multiple sealing strips.

[0022] In a preferred embodiment, the bottom dust collection component includes:

[0023] A pull ring is fixed to the bottom end of a rope. A positioning sleeve is installed on the outer wall of the rope. The positioning sleeve is fixedly connected to the nozzle and is used to guide the rope to slide.

[0024] A linkage ring is fixedly installed at the bottom end of a pull ring. Multiple V-shaped strips are fixed at the bottom end of the linkage ring, and the V-shaped strips are in contact with the bottom end of the inner wall of the bottom inclined hole.

[0025] Multiple elastic bars are fixed to the upper surface of the pull ring and located on one side of the rope. The top of each elastic bar is provided with a support block, which is fixedly connected to the nozzle. The elastic bar is used to provide elastic force to the pull ring.

[0026] In a preferred embodiment, a circular gap is formed between the linkage ring and the inner wall of the bottom tube, and the plurality of V-shaped strips are arranged in a circumferential distribution.

[0027] In a preferred embodiment, the top dust collection component includes:

[0028] A pressure sleeve is fixed to the top of the linkage shaft, and a sealing ring is fixedly connected to the upper surface of the pressure sleeve. The sealing ring is in contact with the nozzle.

[0029] In a preferred embodiment, the upper surface of the pressure sleeve is arranged parallel to the top surface of the linkage shaft, and the top surface of the linkage shaft is rounded.

[0030] In a preferred embodiment, the power unit includes: a pull block, which is fixedly connected to the bottom end of the linkage shaft with the same center, and a support sleeve is installed on the outer wall of the pull block. The support sleeve is fixedly connected to the bottom tube, and the support sleeve is used to guide the movement of the pull block.

[0031] A linear servo is installed at the bottom of the pull block, and the output end of the linear servo is used to pull the pull block to move.

[0032] The technical effects and advantages of the present invention.

[0033] 1. This invention uses a single power unit for drive. A linear servo motor pulls the block and the linkage shaft downwards. The linkage shaft synchronously drives the external stepped dust suppression components and the bottom dust suppression components via ropes. The linkage shaft directly drives the top dust suppression components, realizing the synchronous opening of multiple top inclined holes, multiple sets of middle stepped holes, and multiple sets of bottom inclined holes. The linkage replaces the cumbersome process of operating multiple switches separately in the traditional way, ensuring that a three-dimensional multi-layered stepped water mist coverage can be formed immediately when dust surges during aggregate production. The response is rapid, effectively preventing the instantaneous diffusion of dust during surges, and timely dynamic adjustment of dust suppression measures, greatly improving the dynamic dust suppression effect.

[0034] 2. This invention employs a multi-layered stepped dust suppression system. The outer stepped dust suppression component rotates to open stepped holes of different lengths through the rotating sleeve, forming a gradient atomization layer. The bottom dust suppression component opens the bottom inclined hole through the V-shaped strip to form multi-point coverage at the bottom. The top dust suppression component opens the top inclined hole through the downward movement of the sealing ring to form an upward water curtain. The three components work together to construct a three-dimensional dust suppression barrier around the nozzle, covering the top, middle, and bottom without any dead angles, greatly improving the dust capture efficiency.

[0035] 3. When the dust level returns to normal, the linear servo drives the linkage shaft upward. Under the action of the spring, the rotating sleeve and sealing strip reset and close the stepped hole. Under the action of the spring, the pull ring and V-shaped strip reset and close the bottom inclined hole. The sealing ring resets and closes the top inclined hole simultaneously. The device then returns to the basic dust suppression mode where only the atomizing hole works. This realizes automatic on-demand adjustment of dust suppression intensity, avoids water waste, and all reset adjustments are performed automatically, greatly saving the electrical energy required to simultaneously close multiple top inclined holes, multiple sets of middle stepped holes, and multiple sets of bottom inclined holes. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the area dust suppression device in the aggregate production plant area according to the present invention.

[0037] Figure 2 This is a partial vertical cross-sectional structural diagram of the area dust suppression device in the aggregate production plant area according to the present invention.

[0038] Figure 3 This is a partial structural diagram of the connection between the sleeve and the arc-shaped strip of the present invention.

[0039] Figure 4 This is a partial structural diagram of the vertical section of the connection between the rotating sleeve and the linkage bar of the present invention.

[0040] Figure 5 This is a partial structural diagram of the vertical cross-section at the connection between the swivel and the rope in this invention.

[0041] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0042] Figure 7 This is a partial structural diagram of the vertical cross-section of the connection between the linkage shaft and the pressure sleeve of the present invention.

[0043] Figure 8 This is a partial structural diagram of the support sleeve and linear servo motor of the present invention.

[0044] The attached diagram is labeled as follows: 1. Nozzle; 2. Bottom pipe; 3. Stepped hole; 4. Top inclined hole; 5. Bottom inclined hole; 6. Linkage shaft; 7. Rope; 8. Sleeve; 9. Arc-shaped strip; 10. Inclined arc surface; 11. Rotating sleeve; 12. Arc-shaped groove; 13. Slider; 14. Spring; 15. Linkage strip; 16. Sealing strip; 17. Stepped orifice plate; 18. Atomizing hole; 19. Positioning sleeve; 20. Pull ring; 21. Linkage ring; 22. V-shaped strip; 23. Spring strip; 24. Support block; 25. Pressure sleeve; 26. Sealing ring; 27. Pull block; 28. Linear servo; 29. ​​Support sleeve. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0046] The present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0047] like Figure 1 - Figure 2 The illustrated dust suppression device for an aggregate production plant includes a nozzle 1, and further includes: multiple sets of stepped holes 3, all opened on the outer wall of the nozzle 1, with multiple atomizing holes 18 above the stepped holes 3; a bottom pipe 2, fixedly connected to the bottom end of the nozzle 1, with multiple sets of bottom inclined holes 5 opened at the bottom end of the bottom pipe 2; multiple top inclined holes 4, all inclinedly opened at the top end of the nozzle 1; a linkage shaft 6, installed inside the nozzle 1, with an external stepped dust suppression component on the outer wall of the linkage shaft 6; a rope 7, installed on the external stepped dust suppression component, with a bottom dust suppression component at the bottom end of the rope 7; a top dust suppression component, located at the top of the linkage shaft 6; and a power unit, installed at the bottom end of the linkage shaft 6.

[0048] The implementation principle of this embodiment is as follows: First, the top of the nozzle 1 is threaded to the tap water pipe. Through the pressure of tap water, the atomized water is poured into the nozzle 1. When the amount of aggregate dust in the aggregate production plant is normal, the water is pressurized and diverted to multiple atomizing holes 18. The multiple atomizing holes 18 can atomize the water outward in a horizontal state, thereby bringing the aggregate dust into contact with the atomized water to achieve regional dust suppression. When the amount of aggregate dust is normal, water can be saved to meet the normal dust suppression requirements.

[0049] When the amount of aggregate dust surges abnormally, the power unit drives the linkage shaft 6 to move downward. This linkage shaft 6 simultaneously drives the external stepped dust suppression components to rotate, thereby opening multiple sets of stepped holes 3. Water is sprayed from inside the multiple sets of stepped holes 3 outward at an angle, forming a stepped dust suppression method in the middle of the nozzle 1. At the same time, the external stepped dust suppression components start to pull the rope 7, which drives the bottom dust suppression components to open multiple sets of bottom inclined holes 5 to achieve bottom dust suppression. At the same time, the linkage shaft 6 starts to drive the top dust suppression components to move downward, thus opening multiple top inclined holes 4 to form a top dust suppression area. This ensures that multiple stepped layer coverage dust suppression is achieved at different positions on the nozzle 1 at the same time. This multi-step layer coverage dust suppression treatment is used to deal with abnormally surged aggregate dust, and the dust suppression measures are dynamically adjusted in a timely manner, which greatly improves the dynamic treatment effect of dust suppression.

[0050] Example 2: Based on Example 1, this example discloses a regional dust suppression device for aggregate production plant areas.

[0051] like Figure 2 - Figure 4 As shown, the external stepped dust suppression component includes: a sleeve 8, fixed to the outer wall of the linkage shaft 6, with multiple arc-shaped strips 9 fixed on the lower surface of the sleeve 8; a sloping arc surface 10, formed at the bottom end of the arc-shaped strips 9, with a rotating sleeve 11 slidably mounted on the outer wall of the arc-shaped strips 9, and the rotating sleeve 11 is fixedly connected to the top end of the rope 7, with multiple arc-shaped grooves 12 formed on the upper surface of the rotating sleeve 11, and the arc-shaped strips 9 and the rotating sleeves 11 to which the arc-shaped grooves 12 belong are slidably connected; and multiple sliders 13, all sliding on the inner wall of the rotating sleeve 11, and all sliders 13... A spring plate 14 is installed between the slider 13 and the rotating sleeve 11, and is fixedly connected to the nozzle 1. The spring plate 14 provides elastic force to the rotating sleeve 11. Multiple linkage bars 15 are fixed to the outer wall of the rotating sleeve 11, and a sealing strip 16 is fixed to one side of each linkage bar 15. The sealing strip 16 is in contact with the nozzle 1. A stepped orifice plate 17 is installed on the outside of the stepped holes 3. Multiple stepped orifice plates 17 are fixedly connected to the nozzle 1. The number of stepped holes 3 in each group is set to multiple, and the length of the multiple stepped holes 3 decreases from top to bottom. The cross-sectional shape of the arc strip 9 is arc-shaped, and multiple arc strips 9 are arranged in a circumferential distribution. The multiple stepped orifice plates 17 are respectively set to correspond one-to-one with the multiple sealing strips 16.

[0052] The implementation principle of this embodiment is as follows: When the linkage shaft 6 moves downward, it will drive the sleeve 8 to move downward simultaneously. The sleeve 8 will drive the two arc-shaped strips 9 to move downward. Since the inclined arc surface 10 at the bottom of the arc-shaped strip 9 is in an inclined arc shape, the inclined arc surface 10 on the arc-shaped strip 9 contacts the arc groove 12 on the inner wall of the rotating sleeve 11. Thus, the arc-shaped strip 9 squeezes the rotating sleeve 11, causing the rotating sleeve 11 to rotate counterclockwise. The rotating sleeve 11 drives the spring piece 14 to rotate counterclockwise. The spring piece 14 squeezes the slider 13, and the nozzle 1 supports the slider 13. In this way, the spring piece 14 can press against the rotating sleeve. 11 provides elasticity, and simultaneously, the rotating sleeve 11 rotates counterclockwise along the outer wall of the slider 13. The rotating sleeve 11 drives multiple linkage bars 15 to rotate counterclockwise, and the linkage bars 15 drive the sealing strip 16 to rotate counterclockwise. The sealing strip 16 rotates counterclockwise on the nozzle 1, which opens multiple sets of stepped holes 3. Water is sprayed outward from the inside of the multiple sets of stepped holes 3 in a stepped manner, forming a stepped dust suppression method in the middle of the nozzle 1. At the same time, multi-step layer coverage dust suppression is achieved at different positions on the nozzle 1, which can achieve multi-step layer coverage dust suppression treatment for abnormally increased aggregate dust. Later, when the linkage shaft 6 moves upward, the linkage shaft 6 drives the sleeve 8 to move upward, and the sleeve 8 drives the arc-shaped strip 9 to move upward. The arc-shaped strip 9 no longer squeezes the rotating sleeve 11, and under the action of the spring plate 14, the rotating sleeve 11 rotates clockwise to reset.

[0053] Example 3: Based on Example 2, this example discloses a regional dust suppression device for aggregate production plant areas.

[0054] like Figure 5 - Figure 6 As shown, the bottom dust-collecting component includes: a pull ring 20, fixed to the bottom end of a rope 7, with a positioning sleeve 19 installed on the outer wall of the rope 7. The positioning sleeve 19 is fixedly connected to the nozzle 1 and serves to guide the sliding of the rope 7; a linkage ring 21, fixedly installed at the bottom end of the pull ring 20, with multiple V-shaped strips 22 fixed to the bottom end of the linkage ring 21, the V-shaped strips 22 abutting against the bottom end of the inner wall of the bottom inclined hole 5; and multiple elastic strips 23, all fixed to the upper surface of the pull ring 20 and located on one side of the rope 7. Each elastic strip 23 has a support block 24 at its top, which is fixedly connected to the nozzle 1. The elastic strips 23 provide elastic force to the pull ring 20. A circular gap is formed between the linkage ring 21 and the inner wall of the bottom tube 2, and the multiple V-shaped strips 22 are arranged in a circumferential distribution.

[0055] The implementation principle of this embodiment is as follows: When the rotating sleeve 11 rotates counterclockwise, the top of the rope 7 will rotate counterclockwise and be pulled. The rope 7 will be guided upward along the inner wall of the positioning sleeve 19, and the bottom of the rope 7 will drive the pull ring 20 to move upward. In this way, the pull ring 20 starts to pull the linkage ring 21 upward. The linkage ring 21 compresses the elastic strip 23. The nozzle 1 supports the support block 24, and the support block 24 provides support force to the elastic strip 23, so that the elastic strip 23 can form a compression operation on the support block 24. The elastic strip 23 provides elastic force to the pull ring 20, so the pull ring 20 drives the linkage ring 21 to move upward. The linkage ring 21 drives multiple V-shaped strips 22 to move upward at the same time, which opens multiple sets of bottom inclined holes 5. The three bottom inclined holes 5 on each set are arranged in a V-shaped path. In this way, multiple bottom inclined holes 5 form a three-point stepped distribution atomization spray at the bottom of the bottom tube 2, ensuring that multiple sets of bottom inclined holes 5 achieve multi-layer coverage and dust suppression at the bottom at the same time. Later, when the rotating sleeve 11 rotates clockwise to reset, the spring bar 23 pushes the pull ring 20 down to reset to the original position.

[0056] Example 4: Based on Example 3, this example discloses a regional dust suppression device for aggregate production plant areas.

[0057] like Figure 7 As shown, the top dust-collecting component includes: a pressure sleeve 25, fixed to the top of the linkage shaft 6, with a sealing ring 26 fixedly connected to the upper surface of the pressure sleeve 25, and the sealing ring 26 abutting against the nozzle 1. The upper surface of the pressure sleeve 25 is parallel to the top surface of the linkage shaft 6, and the top surface of the linkage shaft 6 is rounded.

[0058] The implementation principle of this embodiment is as follows: when the linkage shaft 6 moves down, it will simultaneously drive the pressure sleeve 25 to move down, and the pressure sleeve 25 will cause the sealing ring 26 to move down. The sealing ring 26 will no longer block the top inclined hole 4, so that the water is atomized and sprayed from multiple top inclined holes 4 in an inclined state, thereby forming an inclined and upward dust suppression area on the top of the nozzle 1 at the same time.

[0059] Example 5: Based on Example 4, this example discloses a regional dust suppression device for aggregate production plant areas.

[0060] like Figure 5 - Figure 8 As shown, the power unit includes: a pull block 27, which is fixedly connected to the bottom end of the linkage shaft 6 with the same center, and a support sleeve 29 is installed on the outer wall of the pull block 27. The support sleeve 29 is fixedly connected to the bottom tube 2 and is used to guide the movement of the pull block 27; a linear servo motor 28 is installed at the bottom end of the pull block 27, and the output end of the linear servo motor 28 is used to pull the pull block 27 to move.

[0061] The implementation principle of this embodiment is as follows: The support sleeve 29 is supported by the bottom inclined hole 5, and the support sleeve 29 supports the linear servo motor 28. The linear servo motor 28 is directly connected to the switch. When the top of the linear servo motor 28 moves downward, it can pull the pull block 27 downward. The pull block 27 moves downward along the inner wall of the support sleeve 29, which drives the linkage shaft 6 downward, providing the power for the linkage shaft 6 to move downward. In this way, the same power source can open multiple sets of stepped holes 3, multiple sets of bottom inclined holes 5, and multiple sets of top inclined holes 4, so as to achieve multi-layer coverage dust suppression treatment for abnormally increased aggregate dust, timely and dynamically adjust dust suppression measures, and save power energy.

[0062] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures, nor will they be described here.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A regional dust suppression device for an aggregate production plant, comprising nozzles (1), characterized in that, Also includes: Multiple sets of stepped holes (3) are opened on the outer wall of the nozzle (1), and multiple atomizing holes (18) are provided above the stepped holes (3). The bottom tube (2) is fixedly connected to the bottom end of the nozzle (1), and the bottom end of the bottom tube (2) has multiple sets of bottom oblique holes (5). Multiple top-angled holes (4) are all inclinedly opened at the top of the nozzle (1); The linkage shaft (6) is installed inside the nozzle (1), and the outer wall of the linkage shaft (6) is provided with an external stepped dust-reducing component; Rope (7) is installed on the external step dust suppression component, and the bottom end of rope (7) is provided with a bottom dust suppression component; The top dust collection component is installed at the top of the linkage shaft (6); The power unit is installed at the bottom end of the linkage shaft (6); When the amount of aggregate dust surges abnormally, the power unit drives the linkage shaft (6) to move downward. The linkage shaft (6) simultaneously drives the external stepped dust suppression component to rotate to open multiple sets of stepped holes (3) to achieve stepped dust suppression in the middle. At the same time, the external stepped dust suppression component pulls the rope (7) to drive the bottom dust suppression component to open multiple sets of bottom inclined holes (5) to achieve bottom dust suppression. Simultaneously, the linkage shaft (6) drives the top dust suppression component to move downward to open multiple top inclined holes (4) to form a top dust suppression area. The external stepped dust suppression component includes: The sleeve (8) is fixed on the outer wall of the linkage shaft (6), and multiple arc-shaped strips (9) are fixed on the lower surface of the sleeve (8). An oblique arc surface (10) is opened at the bottom end of the arc strip (9). A rotating sleeve (11) is slidably installed on the outer wall of the arc strip (9), and the rotating sleeve (11) is fixedly connected to the top end of the rope (7). Multiple arc grooves (12) are opened on the upper surface of the rotating sleeve (11), and the arc strip (9) and the rotating sleeve (11) to which the arc groove (12) belongs are slidably connected. Multiple sliders (13) slide on the inner wall of the rotating sleeve (11), and the multiple sliders (13) are fixedly connected to the nozzle (1). A spring piece (14) is installed between the slider (13) and the rotating sleeve (11), and the spring piece (14) is used to provide elastic force to the rotating sleeve (11). Multiple linkage bars (15) are fixed to the outer wall of the rotating sleeve (11), and a sealing strip (16) is fixed on one side of each linkage bar (15). The sealing strip (16) is in contact with the nozzle (1). A stepped perforated plate (17) is installed outside the stepped holes (3). Multiple stepped perforated plates (17) are fixedly connected to the nozzle (1). The number of stepped holes (3) in each group is set to multiple. The length of the multiple stepped holes (3) decreases sequentially from top to bottom. The bottom dust collection component includes: A pull ring (20) is fixed to the bottom end of a rope (7). A positioning sleeve (19) is installed on the outer wall of the rope (7). The positioning sleeve (19) is fixedly connected to the nozzle (1), and the positioning sleeve (19) is used to guide the rope (7) to slide. Linkage ring (21) is fixedly installed at the bottom end of pull ring (20). Multiple V-shaped strips (22) are fixed at the bottom end of the linkage ring (21). The V-shaped strips (22) are in contact with the bottom end of the inner wall of the bottom inclined hole (5). Multiple elastic strips (23) are fixed to the upper surface of the pull ring (20) and located on one side of the rope (7). A support block (24) is provided at the top of each elastic strip (23), and the support block (24) is fixedly connected to the nozzle (1). The elastic strips (23) provide elasticity to the pull ring (20). The top dust-reducing component includes: A pressure sleeve (25) is fixed to the top of the linkage shaft (6). A sealing ring (26) is fixedly connected to the upper surface of the pressure sleeve (25). The sealing ring (26) is in contact with the nozzle (1).

2. The area dust suppression device for aggregate production plants according to claim 1, characterized in that: The cross-sectional shape of the arc strip (9) is circular arc, and multiple arc strips (9) are arranged in a circular distribution.

3. The area dust suppression device for aggregate production plants according to claim 1, characterized in that: Multiple stepped perforated plates (17) are respectively set to correspond one-to-one with multiple sealing strips (16).

4. The area dust suppression device for aggregate production plants according to claim 1, characterized in that: A circular gap is formed between the linkage ring (21) and the inner wall of the bottom tube (2), and the multiple V-shaped strips (22) are arranged in a circular distribution.

5. The area dust suppression device for aggregate production plants according to claim 1, characterized in that: The upper surface of the pressure sleeve (25) is arranged parallel to the top surface of the linkage shaft (6), and the top surface of the linkage shaft (6) is rounded.

6. The area dust suppression device for aggregate production plants according to claim 1, characterized in that: The power unit includes: Pull block (27) is fixedly connected to the bottom end of linkage shaft (6) with the same center, and a support sleeve (29) is installed on the outer wall of the pull block (27). The support sleeve (29) is fixedly connected to the bottom tube (2). The support sleeve (29) is used to guide the movement of the pull block (27). A linear servo motor (28) is installed at the bottom of the pull block (27), and the output end of the linear servo motor (28) is used to pull the pull block (27) to move.

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