Concrete production powder feeding dust falling device

Abstract

The application provides a concrete production powder feeding dust falling device, and relates to the technical field of powder dust falling, which comprises an adjusting mechanism, which is connected with a rotating displacement conversion device through cooperation of an adjusting pipe, a water inlet hose, a water outlet pipe, a spray pipe, a spray head, a follow-up sleeve, a hexagonal groove, a hexagonal rod, a threaded rod, a sealing sleeve, a double-control disc, a positioning rod, a fitting disc, a spring, a control disc, a control rod, a pushing disc, a control spring, an insertion rod and an adjusting head, so that the rotating displacement is converted into adjustment of the flow gap between the fitting disc and the double-control disc, real-time matching of the spraying amount and the feeding amount is realized, the spraying amount is automatically increased at the moment of powder feeding to inhibit dust raising, the spraying amount is automatically reduced with the reduction of powder conveying, and the contradiction between poor dust falling effect of fixed spraying amount and waste of water resources is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of dust suppression technology for powder materials, and more specifically, to a dust suppression device for powder material feeding in concrete production. Background Technology

[0002] In existing technologies, dust suppression devices for concrete production powder feeding typically employ fixed spray systems. These systems use a set of nozzles positioned above the conveyor belt to continuously spray water mist to suppress dust. However, this constant spray volume design cannot respond to dynamic changes in factors such as powder flow rate, drop height, and ambient wind speed during the feeding process. When the feed volume is small, a fixed spray volume can lead to excessive water usage, causing the powder moisture content to exceed the standard and affecting the accuracy of the concrete mix proportions. Conversely, when the feed volume suddenly increases or a momentary dust peak occurs, the fixed spray volume is insufficient to effectively cover all dust sources due to insufficient water spray volume. This results in a large amount of fine dust escaping into the workshop environment, causing not only material waste but also long-term health hazards to operators.

[0003] The aforementioned fixed spray mode further exacerbates the dual contradiction of resource waste and environmental pressure in practical applications. Since the spray volume cannot be adjusted in real time according to the dust concentration, the equipment can only operate continuously with the maximum preset water volume to ensure the dust suppression effect under the worst working conditions. This directly leads to the water consumption per ton of powder far exceeding the actual demand and a large amount of dust-containing wastewater requiring additional treatment. At the same time, due to the unstable dust suppression effect, there are frequent instances of fugitive emissions exceeding the standard. As a result, concrete mixing plants have always found it difficult to achieve a balance between clean production and operating costs when facing increasingly stringent environmental regulations. Summary of the Invention

[0004] (a) Technical problems to be solved To address the problems existing in the prior art, the present invention provides a dust suppression device for feeding concrete powder, thereby solving the technical problems mentioned in the background art.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a dust suppression device for feeding concrete powder, comprising a fixedly installed conveyor frame and a conveyor belt connected to the conveyor frame; and further comprising a follow-up mechanism and an adjustment mechanism; The follower mechanism includes multiple fixed rods fixedly mounted on the conveyor frame, and guide rods are respectively mounted on the two sets of fixed frames. Follower blocks are slidably mounted on the guide rods, and the multiple follower blocks are divided into two groups. The two groups of follower blocks are respectively connected to the collection hopper, and three steel belts are slidably mounted inside the collection hopper. The regulating mechanism includes a regulating pipe and a water inlet hose connected to the side wall of the regulating pipe. A water outlet pipe is provided on the other side of the regulating pipe, and a spray pipe is provided on the water outlet pipe. The spray pipe passes through the follower block and is fixedly installed on the collection hopper. Each spray pipe is provided with a nozzle.

[0006] Preferably, the follower mechanism further includes winding sections disposed at both ends of the steel strip, the steel strip being respectively attached to the two follower blocks, and the two winding sections being respectively rotatably connected to the rotating sleeve.

[0007] Preferably, each of the follower blocks is provided with two fixed disks, the rotating sleeve is rotatably connected to the fixed disks, the winding section is located between the two fixed disks, the rotating sleeve is provided with a rotating disk, the rotating disk is provided with a return spring, and the return spring is connected to the fixed disk.

[0008] Preferably, the regulating tube is provided with a fixing frame, the rotating disk is attached to the fixing frame, and the two ends of the fixing frame are respectively fixedly connected to the fixing disk.

[0009] Preferably, the adjustment mechanism further includes a follower sleeve fixedly installed inside the rotating sleeve. The follower sleeve has a hexagonal groove, and a hexagonal rod is coaxially arranged inside the follower sleeve, with the hexagonal rod being limited and connected within the hexagonal groove.

[0010] Preferably, a threaded rod is coaxially provided on the hexagonal rod, the threaded rod is threadedly connected to the inner wall of the adjusting tube, and a sealing sleeve is coaxially provided on the threaded rod, the sealing sleeve sealingly fitting against the inner wall of the adjusting tube.

[0011] Preferably, the regulating pipe is provided with a dual control plate inside, which separates the water outlet pipe and the water inlet hose. A positioning rod is slidably provided inside the threaded rod, and a fitting plate is provided on the positioning rod, which abuts against the dual control plate.

[0012] Preferably, a spring is provided inside the threaded rod, the other end of the spring abuts against the bonding disc, and a control disc is provided at the other end of the bonding disc.

[0013] Preferably, the regulating tube is threaded with a control rod, the control rod is equipped with a push plate, the control plate is equipped with a control spring, the control spring abuts against the push plate, and an insertion rod is coaxially arranged on the control rod, the insertion rod being inserted into the control plate.

[0014] Preferably, an adjustment head is coaxially mounted on the control lever.

[0015] (III) Beneficial Effects Compared with the prior art, the present invention provides a dust suppression device for feeding concrete powder, which has the following beneficial effects: This invention utilizes an innovative powder weight-sensing follow-up mechanism to convert the instantaneous weight change of powder in the collection hopper into a dynamic adjustment signal for the spray volume in real time. This achieves precise matching between dust suppression water consumption and dust generation. When a large amount of powder is added to the collection hopper at once, the steel belt bends and deforms downwards under the pressure of the powder. The winding section is stretched, causing the rotating sleeve to rotate. Through the linkage between the follow-up sleeve and the hexagonal rod, the threaded rod is driven to rotate and move axially, causing the contact plate to move away from the dual control plate, increasing the flow gap. The spray volume reaches its peak synchronously to suppress the instantaneous dust peak. As the conveyor belt gradually transports the powder downstream, the bending of the steel belt decreases, and the threaded rod reverses and resets, narrowing the flow gap and reducing the spray volume synchronously. The spray volume drops to its minimum when all the powder has been transported. This mechanical negative feedback adjustment based on the powder's own weight can achieve automatic spray volume tracking without the need for external sensors or control systems. This ensures dust suppression effectiveness under harsh working conditions and avoids water waste during dust-free periods.

[0016] The adjustment mechanism constructed in this invention, which combines a threaded rod with a dual control disc, precisely converts the rotational displacement generated by the follower mechanism into a linear adjustment of the water circuit opening, achieving continuous stepless variation of the spray volume. The threaded fit between the threaded rod and the inner wall of the adjustment pipe ensures a precise linear relationship between its axial displacement and rotation angle. The flow gap between the contact disc and the dual control disc changes synchronously and linearly with the displacement of the threaded rod, thereby ensuring a smooth transition of the spray volume with changes in powder weight. This avoids nozzle pressure fluctuations or a decrease in atomization effect caused by sudden changes in flow rate. At the same time, the sealing and sliding fit between the sealing sleeve and the inner wall of the adjustment pipe ensures the airtightness of the water circuit during the adjustment process, preventing leakage loss of high-pressure water flow and providing stable and reliable flow control for the dust suppression system.

[0017] The follower mechanism of this invention adopts a flexible transmission design of steel belt and rotating sleeve, which effectively buffers the impact load when powder is fed while realizing weight sensing. Multiple steel belts are arranged side by side at the bottom of the collection hopper to evenly distribute the weight of the powder, avoiding mechanical jamming or deformation caused by local overload. The winding structure of the winding section on the rotating sleeve converts the linear displacement of the steel belt into the angular displacement of the rotating sleeve. With the reset force of the return spring, the mechanism can automatically return to zero after the powder is unloaded, preparing for the next feeding and dust suppression. At the same time, the sliding cooperation between the follower block and the guide rod allows the entire collection hopper to move slightly in the vertical direction, further absorbing the impact energy when the powder is fed, and significantly improving the durability and reliability of the device under frequent feeding conditions.

[0018] This invention achieves automatic adjustment while also providing manual intervention and parameter adaptation functions, greatly enhancing the on-site applicability of the equipment. Operators can adjust the control rod's insertion depth in the adjustment tube by rotating the adjustment head according to changes in powder type, conveying speed, or environmental conditions. This, in turn, adjusts the preload of the control spring and the initial position of the contact plate, thereby changing the base level of the spray volume and the response sensitivity. When it is necessary to temporarily stop the spray, simply continue rotating the adjustment head to make the control plate contact the double control plate to cut off the water circuit. This combination of manual and automatic control mode allows the device to flexibly adapt to the dust suppression needs of different production conditions, avoiding adjustment mismatch problems caused by differences in powder characteristics.

[0019] This invention achieves adaptive adjustment of spray volume through a purely mechanical structure, requiring no electric drive, sensors, or control system. It offers unparalleled reliability in harsh working environments filled with dust. All moving parts employ a sealed structure to effectively isolate dust intrusion. The rolling fit between the rotating sleeve and the fixed disc, as well as the helical drive between the threaded rod and the adjusting pipe, have excellent self-lubricating properties, requiring no frequent maintenance during long-term operation. Furthermore, the device's compact structure allows for direct integration into existing conveyor belt feeding systems without requiring large-scale modifications to the original production line. This provides concrete mixing plants with a low-cost, highly reliable, and easy-to-implement dust suppression solution for powder feeding. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a concrete production powder feeding and dust suppression device according to the present invention; Figure 2 This is a schematic diagram of the structure of the collecting hopper in this invention; Figure 3 This is a schematic diagram of the follower block and steel strip in this invention; Figure 4 This is a cross-sectional view of the follower block and the winding section in this invention; Figure 5 This is a schematic diagram of the follower block in this invention; Figure 6 This is a schematic diagram of the regulating tube in this invention; Figure 7 This is a cross-sectional view of the regulating tube in this invention; Figure 8 This is a cross-sectional view of the positioning rod and control rod in this invention.

[0021] In the diagram: 11. Conveyor frame; 12. Conveyor belt; 21. Follower mechanism; 22. Fixed rod; 23. Guide rod; 24. Follower block; 25. Collection hopper; 26. Steel belt; 27. Winding section; 28. Rotating sleeve; 29. ​​Fixed disc; 31. Adjusting mechanism; 32. Adjusting pipe; 33. Water inlet hose; 34. Water outlet pipe; 35. Spray pipe; 36. Nozzle; 37. Follower sleeve; 38. Hexagonal groove; 39. Hexagonal rod; 210. Rotating disc; 211. Return spring; 212. Fixed frame; 310. Threaded rod; 311. Sealing sleeve; 312. Double control disc; 313. Positioning rod; 314. Adhesion disc; 315. Spring; 316. Control disc; 317. Control rod; 318. Push disc; 319. Control spring; 320. Insertion rod; 321. Adjusting head. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] Please see Figures 1 to 8 This embodiment provides a dust suppression device for feeding concrete powder. The device aims to solve the technical problem that the existing fixed spray volume dust suppression method cannot be dynamically adjusted according to the feed volume, resulting in poor dust suppression effect or waste of water resources. By integrating a follow-up mechanism based on powder weight sensing and a set of adjustment mechanism that can adjust the water channel opening, the real-time matching of spray volume and feed volume is realized, which significantly improves the dust suppression effect and water economy.

[0026] 1. Overall structure and initial state The concrete production powder feeding and dust suppression device includes a fixedly installed conveyor frame 11 and a conveyor belt 12 rotatably connected to the conveyor frame 11. It also includes a follower mechanism 21 and an adjustment mechanism 31 installed on the conveyor frame 11. The follower mechanism 21 is used to sense the weight change of the powder in the collection hopper and convert the change into a mechanical displacement signal. The adjustment mechanism 31 is used to adjust the spray volume in real time according to the displacement signal transmitted by the follower mechanism.

[0027] 2. Composition of the core system 2.1 Follower mechanism 21 The follower mechanism 21 is the core unit that senses the weight of the powder and generates a displacement signal. It includes multiple fixed rods 22 fixedly mounted on the conveyor frame 11. Guide rods 23 are fixedly mounted on two sets of fixed frames 212 respectively. Follower blocks 24 are slidably mounted on the guide rods 23, and the multiple follower blocks 24 are divided into two groups. The two groups of follower blocks 24 are fixedly connected to both sides of the collection hopper 25. Three steel belts 26 for bearing the weight of the powder are slidably mounted inside the collection hopper 25. The two ends of the steel belts 26 are respectively provided with winding sections 27, and the steel belts 26 are respectively attached to the upper surfaces of two follower blocks 24. Two winding segments 27 are rotatably connected to the rotating sleeve 28. Two fixed disks 29 are fixedly installed on each follower block 24. The rotating sleeve 28 is rotatably connected to the fixed disks 29 and the winding segment 27 is located between the two fixed disks 29. A rotating disk 210 is fixedly installed on the rotating sleeve 28. A return spring 211 is installed between the rotating disk 210 and the fixed disk 29. A fixed frame 212 is fixedly installed on the adjusting tube 32 and the two ends of the fixed frame 212 are fixedly connected to the two fixed disks 29. The outer edge of the rotating disk 210 is attached to the inner wall of the fixed frame 212.

[0028] 2.2 Adjustment Mechanism 31 The regulating mechanism 31 is the core unit that responds to the displacement of the follower mechanism and adjusts the spray volume. It includes an regulating pipe 32 and a water inlet hose 33 connected to the side wall of the regulating pipe 32. A water outlet pipe 34 is provided on the other side of the regulating pipe 32, and a spray pipe 35 is connected to the water outlet pipe 34. The spray pipe 35 passes through the follower block 24 and is fixedly mounted on the collection hopper 25. Each spray pipe 35 is provided with a nozzle 36 for spraying. The regulating mechanism 31 also includes a follower sleeve 37 fixedly installed in the rotating sleeve 28. A hexagonal groove 38 is opened in the follower sleeve 37, and a hexagonal rod 39 is coaxially arranged in the follower sleeve 37. The hexagonal rod 39 is slidably connected to the hexagonal groove 38. A threaded rod 310 is coaxially fixed on the hexagonal rod 39 and threadedly connected to the inner wall of the regulating pipe 32. A sealing sleeve 311 is coaxially fixed on the threaded rod 310, and the outer wall of the sealing sleeve 311 is sealed against the inner wall of the regulating pipe 32. A dual control panel 312 is fixedly installed inside the 32, separating the chamber containing the water outlet pipe 34 and the water inlet hose 33. A positioning rod 313 is slidably installed inside the threaded rod 310. A fitting plate 314 is fixedly installed on the positioning rod 313, and the edge of the fitting plate 314 can abut against the dual control panel 312. A spring 315 is installed inside the threaded rod 310, with one end of the spring 315 abutting against the inner wall of the threaded rod 310 and the other end abutting against the fitting plate 312. On 14, a control plate 316 is fixedly installed at the other end of the bonding plate 314. A control rod 317 is internally threaded to the adjusting tube 32. A push plate 318 is fixedly installed on the control rod 317. A control spring 319 is installed between the control plate 316 and the push plate 318. An insertion rod 320 is coaxially installed on the control rod 317 and is inserted into the control plate 316. An adjusting head 321 for manual adjustment is coaxially installed at the outer end of the control rod 317.

[0029] 3. Working process and principle of the device The working process and principle of the concrete production powder feeding and dust suppression device are as follows: When the external equipment puts the powder to be conveyed into the collection hopper 25, the weight of the powder is instantly applied to the three steel belts 26. Under the pressure of the powder, the steel belts 26 bend and deform downwards. The winding sections 27 at both ends of the steel belts 26 are stretched and drive the rotating sleeve 28 to rotate against the elastic force of the return spring 211. The rotation of the rotating sleeve 28 drives the follower sleeve 37, which is fixedly connected to it, to rotate synchronously. The follower sleeve 37 drives the hexagonal rod 39 and the threaded rod 310 to rotate through the limiting cooperation of the hexagonal groove 38 and the hexagonal rod 39. Since the threaded rod 310 is threadedly connected to the inner wall of the regulating pipe 32, the rotation of the threaded rod 310 causes it to move axially away from the regulating pipe 32.

[0030] The axial movement of the threaded rod 310 reduces the compression of the spring 315. Under the elastic force of the spring 315, the bonding disc 314 moves towards the threaded rod 310, thereby increasing the flow gap between the bonding disc 314 and the double control disc 312. At this time, the water flowing from the inlet hose 33 passes through the gap between the double control disc 312 and the bonding disc 314, the outlet pipe 34, and the spray pipe 35 before being sprayed out from the nozzle 36. As the flow gap increases, the spray volume increases accordingly. When a large amount of powder is put into the collection hopper 25 at once, the bending deformation of the steel belt 26 is the largest, and the spray volume reaches its peak, which just matches the dust suppression requirements of the instantaneous dust peak.

[0031] As the conveyor belt 12 operates, the powder in the collection hopper 25 is gradually transported downstream. The downward pressure of the powder on the steel belt 26 gradually decreases, and the steel belt 26 gradually rebounds under the action of the return spring 211. The retraction of the winding section 27 drives the rotating sleeve 28 to rotate in the opposite direction. The threaded rod 310 rotates in the opposite direction and moves axially to reset towards the follower sleeve 37. The compression of the spring 315 increases, pushing the contact plate 314 to move towards the double control plate 312. The flow gap decreases, causing the spray volume to decrease synchronously, thereby achieving real-time matching between the spray volume and the amount of powder in the collection hopper. When all the powder is transported, the spray volume drops to the minimum, avoiding resource waste caused by ineffective water spraying.

[0032] The operator can manually adjust the spray volume according to the actual dust suppression needs on site. By rotating the adjustment head 321, the control rod 317 rotates inside the adjustment tube 32. The axial movement of the control rod 317 compresses or releases the control spring 319 through the push plate 318, thereby pushing the control plate 316 and the contact plate 314 to change the initial opening of the flow gap. When it is necessary to increase the spray volume, rotate the adjustment head 321 to make the control rod 317 screw into the adjustment tube 32. The push plate 318 pushes the control plate 316 through the control spring 319 to make the contact plate 314 move away from the double control plate 312. The flow gap increases and the spray volume increases. When it is necessary to shut down the spray, continue to rotate the control rod 317 until the control plate 316 is attached to the double control plate 312. At this time, the water circuit is completely closed and the spray is shut down.

[0033] Working principle summary: This invention converts the weight of the powder into the rotational displacement of the rotating sleeve 28 through the bending deformation of the steel belt 26 in the follower mechanism 21. The rotational displacement is converted into the gap adjustment between the fitting disc 314 and the double control disc 312 through the linkage of the threaded rod 310 and the hexagonal rod 39 in the adjustment mechanism 31. This achieves real-time matching between the spray volume and the feed volume, which not only ensures the dust reduction effect during the instantaneous dust peak, but also avoids the waste of water resources during dust-free periods.

[0034] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust suppression device for feeding concrete powder, comprising a fixedly installed conveyor frame (11) and a conveyor belt (12) connected to the conveyor frame (11); characterized in that: It also includes a follow-up mechanism (21) and an adjustment mechanism (31); The follower mechanism (21) includes multiple fixed rods (22) fixedly mounted on the conveyor frame (11), and guide rods (23) are respectively mounted on the two sets of fixed frames (212). Follower blocks (24) are slidably mounted on the guide rods (23), and the multiple follower blocks (24) are divided into two groups. The two groups of follower blocks (24) are respectively connected to the collection hopper (25). Three steel belts (26) are slidably mounted inside the collection hopper (25). The regulating mechanism (31) includes a regulating pipe (32) and a water inlet hose (33) connected to the side wall of the regulating pipe (32). A water outlet pipe (34) is provided on the other side of the regulating pipe (32), and a spray pipe (35) is provided on the water outlet pipe (34). The spray pipe (35) passes through the follower block (24) and is fixedly installed on the collection hopper (25). Each spray pipe (35) is provided with a nozzle (36).

2. The dust suppression device for feeding concrete powder according to claim 1, characterized in that: The follower mechanism (21) further includes winding sections (27) disposed at both ends of the steel strip (26), the steel strip (26) being respectively attached to the two follower blocks (24), and the two winding sections (27) being respectively rotatably connected to the rotating sleeve (28).

3. The dust suppression device for feeding concrete powder according to claim 2, characterized in that: Each of the following blocks (24) is provided with two fixed disks (29), and the rotating sleeve (28) is rotatably connected to the fixed disks (29). The winding section (27) is located between the two fixed disks (29). The rotating sleeve (28) is provided with a rotating disk (210), and the rotating disk (210) is provided with a return spring (211). The return spring (211) is connected to the fixed disk (29).

4. A dust suppression device for feeding concrete powder according to claim 3, characterized in that: A fixing frame (212) is provided on the regulating tube (32), the rotating disk (210) is attached to the fixing frame (212), and the two ends of the fixing frame (212) are respectively fixedly connected to the fixing disk (29).

5. A dust suppression device for feeding concrete powder according to claim 3, characterized in that: The adjustment mechanism (31) further includes a follower sleeve (37) fixedly installed inside the rotating sleeve (28). A hexagonal groove (38) is provided inside the follower sleeve (37). A hexagonal rod (39) is coaxially arranged inside the follower sleeve (37), and the hexagonal rod (39) is limited and connected inside the hexagonal groove (38).

6. A dust suppression device for feeding concrete powder according to claim 5, characterized in that: A threaded rod (310) is coaxially provided on the hexagonal rod (39). The threaded rod (310) is threadedly connected to the inner wall of the adjusting tube (32). A sealing sleeve (311) is coaxially provided on the threaded rod (310). The sealing sleeve (311) is sealed and fitted against the inner wall of the adjusting tube (32).

7. A dust suppression device for feeding concrete powder according to claim 6, characterized in that: The regulating pipe (32) is provided with a double control plate (312) inside. The double control plate (312) separates the water outlet pipe (34) and the water inlet hose (33). A positioning rod (313) is slidably provided inside the threaded rod (310). A fitting plate (314) is provided on the positioning rod (313). The fitting plate (314) abuts against the double control plate (312).

8. A dust suppression device for feeding concrete powder according to claim 7, characterized in that: A spring (315) is provided inside the threaded rod (310), and the other end of the spring (315) abuts against the bonding disc (314). A control disc (316) is provided at the other end of the bonding disc (314).

9. A dust suppression device for feeding concrete powder according to claim 8, characterized in that: The regulating tube (32) is threaded with a control rod (317), a push plate (318) is provided on the control rod (317), a control spring (319) is provided on the control plate (316), the control spring (319) abuts against the push plate (318), and an insertion rod (320) is coaxially provided on the control rod (317), the insertion rod (320) is inserted into the control plate (316).

10. A dust suppression device for feeding concrete powder according to claim 9, characterized in that: An adjustment head (321) is coaxially mounted on the control lever (317).

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