Environment-friendly dust removal equipment for concrete stirring

Abstract

The invention provides concrete mixing environment-friendly dust removal equipment which comprises a supporting frame, a mixing barrel is detachably mounted on the supporting frame, a driving motor is arranged at the bottom of the mixing barrel, a rotating shaft is in key connection with an output shaft of the driving motor, a mixing frame is in key connection with the rotating shaft, and the mixing frame is rotationally arranged in an inner cavity of the mixing barrel. In order to control dissipation of dust generated in the stirring process from the source and guarantee cleanness of the working environment and health of operators, a closed assembly controlled to be opened and closed is arranged on the side wall of the stirring barrel, and a closed enclosure is formed for a stirring area by controlling closing of the closed assembly; flying dust generated by cement, fly ash and other fine particles under stirring disturbance is effectively inhibited from diffusing outwards.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete environmental protection dust removal, and particularly relates to an environmental protection dust removal equipment for concrete mixing. BACKGROUND

[0002] Concrete is a kind of artificial stone widely used in building engineering, which is formed by mixing cementitious materials, aggregates, water and, if necessary, additives or admixtures in a certain proportion, and becomes a solid whole after hardening. Its high strength, good durability and wide adaptability make it an irreplaceable basic material for modern buildings.

[0003] Mixing is a key step in the preparation of concrete. If cement, aggregate, water and other components are not fully mixed, it will lead to uneven local strength (such as cement lumps or sandstone concentration), affecting the overall structural performance. At the same time, cement particles need to be in full contact with water to undergo hydration reaction, and mixing can accelerate this process to form a uniform cementitious structure.

[0004] At present, concrete mixing mainly relies on a mixer. However, during the feeding and mixing process, cement, fly ash and other fine particles are prone to generate a large amount of dust due to mechanical disturbance and air flow. These dust not only causes serious air pollution, but also changes the soil pH value after settling, affects the normal growth of vegetation and destroys the surrounding ecological environment. At the same time, the floating dust poses a health threat to the respiratory system of the operators on site.

[0005] In view of the above problems, it is urgent to provide an environmental protection dust removal equipment for concrete mixing, which can effectively block the mixing area through a closed sealing structure, inhibit the dispersion of dust from the source, realize closed operation during mixing, significantly reduce dust emission, protect the air quality of the working environment, protect the health of the operators and the surrounding ecological environment, and improve the operation stability and green construction level of the mixing equipment. SUMMARY

[0006] According to the problems in the background art, the present application provides an environmental protection dust removal equipment for concrete mixing to solve the problems, and the present application will be further described.

[0007] An environmental protection dust removal equipment for concrete mixing, comprising a support frame, a mixing barrel detachably mounted on the support frame, a drive motor provided at the bottom of the mixing barrel, a rotating shaft keyed to the output shaft of the drive motor, a stirring frame keyed to the rotating shaft, and the stirring frame being rotatably arranged in the inner cavity of the mixing barrel. In order to control the dispersion of dust generated during the mixing process from the source, protect the cleanliness of the working environment and the health of the operators, a sealing assembly capable of being controlled to open and close is arranged on the side wall of the mixing barrel.

[0008] Preferably, the closing assembly comprises an arc-shaped guide groove opened in the side edge of the top of the stirring barrel, two symmetrical closing plates slidingly connected in the guide groove, an electric sliding rail mounted on the top of the stirring barrel, a guide frame slidingly connected on the electric sliding rail, a positioning column fixed on the shaft center of the top of the stirring barrel, two angle-distributed rotating rods connected on the positioning column, the free ends of the two rotating rods being fixed on the top of the corresponding closing plate to form a rotating linkage structure, a sliding convex being keyed on each of the rotating rods, two symmetrical sliding grooves being opened in the end of the guide frame, the sliding convexes being slidingly embedded in the corresponding sliding grooves, and an annular guide frame being mounted on the top of the stirring barrel and having an annular slide way opened thereon, the sliding convexes being synchronously slidingly connected in the annular slide way.

[0009] Preferably, a plurality of buffer members are detachably connected on the side edges of the two closing plates close to each other, the buffer member being composed of a flexible rubber plate and a magnet strip fixed on the left and right sides of the rubber plate.

[0010] Preferably, a dust suction fan is arranged on the top of the stirring barrel and communicates with an external dust raising treatment system through a special pipeline.

[0011] Preferably, a counterweight is detachably connected on the bottom of each of the rubber plates.

[0012] Preferably, the rotating shaft penetrates the stirring frame and extends upward, three bearing plates being axially keyed on the rotating shaft in sequence, the bearing plates having uniformly distributed fan-shaped notches opened thereon, the fan-shaped notches of the three bearing plates being staggered, and a scraper one being penetratingly slidingly connected on the rotating shaft between the adjacent two bearing plates.

[0013] Preferably, a scraper two is keyed on the rotating shaft and penetrates the top of the three bearing plates, the both ends of the scraper two being provided with inclined surfaces and being attached to the inner side wall of the stirring barrel.

[0014] Preferably, a reset rotating frame is keyed on the rotating shaft and located at the bottom of the outer wall of the stirring barrel, the both ends of the reset rotating frame being fixed with pulleys, an installation frame being detachably connected on the supporting frame, sliding blocks being slidingly connected on the both ends of the installation frame, compression springs being compressed between the sliding blocks and the installation frame, two elastic steel wire ropes being arranged between the two sliding blocks and being embedded in the left and right side grooves of the pulleys in a symmetrical manner.

[0015] Preferably, a discharging port is arranged on the side wall of the stirring barrel and is provided with an openable and closable sealing cover plate.

[0016] Beneficial effects: compared with the prior art, the device is provided with a closed assembly which is controlled to be opened and closed on the side wall of the stirring barrel. Before the stirring operation starts, the closed assembly is controlled to be closed to form a closed fence for the stirring area, so as to effectively inhibit the outward diffusion of the dust generated by the cement, fly ash and other fine particles under the stirring disturbance. Through the movement of the rubber plate in the dynamic sealing assembly, the caliber of the feeding port is reduced, only a small opening is left to allow the raw material to pour, and the dust escaping during the pouring of the raw material is effectively controlled. Through the cooperation of the reset rotating frame, the pulley and the elastic steel wire rope, the elastic element drives the key components to automatically return to the original position, without the need of an additional power source, so as to effectively ensure the safety of the equipment in the non-working state. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 : the three-dimensional structure schematic diagram of the present application;

[0018] Figure 2 : the partial structure schematic diagram of the present application;

[0019] Figure 3 : the structure schematic diagram of the scraper one, the scraper two and the bearing plate of the present application;

[0020] Figure 4 : the structure schematic diagram of the reset rotating frame, the pulley and the elastic steel wire rope of the present application;

[0021] In the figure: 1- support frame, 11- stirring barrel, 12- driving motor, 121- rotating shaft, 13- dust collection fan, 14- stirring frame, 2- positioning column, 21- guide groove, 22- electric sliding rail, 23- guide frame, 231- sliding groove, 24- closing plate, 25- rubber plate, 251- magnet strip, 26- counterweight, 27- annular guide frame, 28- rotating rod, 281- sliding convex, 3- scraper one, 31- scraper two, 32- bearing plate, 4- reset rotating frame, 41- pulley, 42- elastic steel wire rope, 43- compression spring, 44- sliding block, 45- mounting frame. DETAILED DESCRIPTION

[0022] Next, a specific embodiment of the present application will be described in detail. Figures 1-4

[0023] Reference Figure 1 and Figure 3 and Figure 4 ​The utility model provides a kind of concrete mixing environmental protection dust removal equipment, including support frame 1, the support frame 1 detachably installs mixing drum 11, for containing and mixing concrete raw materials, the bottom of the mixing drum 11 is equipped with driving motor 12, provides stirring power, the output shaft of the driving motor 12 is keyed with rotating shaft 121, rotating shaft 121 is keyed with stirring frame 14, stirring frame 14 rotation is arranged in the inner chamber of mixing drum 11, the full mixing of cement, aggregate, water and other materials is realized by the rotary motion of stirring frame 14, ensure the homogeneity and working performance of concrete.

[0024] To control the dust produced in the mixing process from source, protect the clean of operating environment and the health of operator, the side wall of the mixing drum 11 is provided with a closed assembly which is controlled to open and close, the closed assembly is controlled to open in the feeding stage, allowing the raw materials to be smoothly fed into the mixing drum 11; before the mixing operation starts, it is controlled to close, forming airtight enclosure for the mixing area, effectively inhibiting the dust produced by cement, fly ash and other fine particles from spreading outward under the disturbance of mixing.

[0025] Reference Figure 1 The closed assembly includes an arc-shaped guide groove 21 opened in the top side of the mixing drum 11, two symmetrical closing plates 24 are slidably connected in the guide groove 21, the two closing plates 24 move towards or away along the arc-shaped path set by the guide groove 21, the opening and closing of the mixing drum 11 is realized by the opening and closing action of the closing plates 24: opening facilitates the feeding of materials; closing forms complete coverage for the mixing area, realizing airtight enclosure, preventing dust from leaking out.

[0026] Reference Figure 1 To ensure the synchronous and stable movement of the two closing plates 24, an electric sliding rail 22 is installed on the top of the mixing drum 11, a guide frame 23 is slidably connected on the electric sliding rail 22, a positioning column 2 is fixedly connected at the top shaft center of the mixing drum 11, two angle-distributed rotating rods 28 are connected to the top of the positioning column 2, the free ends of the two rotating rods 28 are respectively fixedly connected to the top of the corresponding closing plates 24, forming a rotating linkage structure.

[0027] Reference Figure 1 A sliding convexity 281 is keyed on each of the rotating rods 28, two symmetrical sliding grooves 231 are opened at the end of the guide frame 23, the sliding convexity 281 is slidably embedded in the corresponding sliding groove 231, an annular guide frame 27 is also installed on the top of the mixing drum 11, an annular slide is opened on the annular guide frame 27, the sliding convexity 281 is synchronously slid in the annular slide, therefore, the sliding convexity 281 is doubly guided and constrained during movement: sliding along the sliding groove 231 on the guide frame 23, and synchronously sliding in the annular slide of the annular guide frame 27, the two work together to force the sliding convexity 281 to move along the predetermined composite arc-shaped track.

[0028] Initially, the two closing plates 24 are closed, and the mixing drum 11 is sealed. Before feeding, the electric slide rail 22 is activated, and the guide frame 23 moves backward under control, causing the slide chute 231 to move backward synchronously. Under the joint guidance of the slide chute 231 and the annular slide, the sliding protrusion 281 slides along the set arc path, thereby driving the rotating rod 28 to rotate around the positioning column 2, and finally causing the two closing plates 24 to slide back and forth along the arc guide groove 21, so that a feed port is formed at the top of the mixing drum 11, and the bucket containing concrete raw materials (hereinafter collectively referred to as: raw materials) extends into the inner cavity of the mixing drum 11 from there.

[0029] To effectively suppress dust emissions during the dumping process, this device adds a dynamic sealing component to the existing enclosed components, further enhancing the control of dust emissions during the feeding stage.

[0030] refer to Figure 2 Each of the two closing plates 24 has multiple buffer components detachably connected to its adjacent edges. Each buffer component consists of a flexible rubber sheet 25 and magnetic strips 251 fixed to the left and right sides of the rubber sheet 25. The two adjacent buffer components attract each other through the magnetic strips 251, forming a stable whole. When the two closing plates 24 move towards each other to near their closed position, the magnetic strips 251 on the buffer components attract each other, forming a continuous and stable sealing interface. The buffer components move synchronously with the closing plates 24, serving both structural connection and elastic sealing functions.

[0031] During the feeding process, the closing plate 24 needs to be in the open state, and a feeding port is formed at the top of the mixing tank 11. The purpose of setting the buffer is to reduce the diameter of this feeding port by moving the rubber plate 25, leaving only a small opening to allow the raw materials to be poured out, while effectively controlling the escape of dust.

[0032] After the two closing plates 24 slide open in opposite directions, a feed inlet is formed at the top of the mixing tank 11. The bucket containing the raw materials extends into the mixing tank 11 through the feed inlet. Before the bucket tilts, the electric slide rail 22 is activated again, and the guide frame 23 moves forward and resets under control, causing the slide groove 231 to move forward synchronously. Under the joint guidance of the slide groove 231 and the annular slide, the sliding protrusion 281 slides along the set arc path, thereby driving the rotating rod 28 to rotate around the positioning post 2, and finally causing the two closing plates 24 to slide towards each other along the arc guide groove 21. The buffers on them move closer together synchronously. When the buffers on the two closing plates 24 are in contact with both sides of the bucket, the elastic deformation of the rubber plate 25 provides buffering and contact pressure, realizing dynamic sealing of the gap between the bucket and the feed inlet.

[0033] At this point, the electric slide rail 22 is closed, and the bucket begins to dump the raw material (this is existing technology and will not be described in detail). Since the opening of the mixing tank 11 has been effectively narrowed by the buffer, leaving only a narrow passage for the bucket to pass through, the gas exchange area between the internal space of the mixing tank 11 and the outside world is greatly reduced, which significantly suppresses the escape of dust generated during the dumping process.

[0034] To enhance the ability of the mixing tank 11 to control internal dust during feeding and mixing, this device is equipped with a dust extraction fan 13 at the top of the mixing tank 11. The dust extraction fan 13 is connected to the external dust treatment system through a dedicated pipeline to forcibly extract the dust-laden gas generated during the mixing process and transport it to the subsequent purification equipment for treatment, so as to achieve efficient dust collection and compliant emission.

[0035] refer to Figure 1 The installation position of the dust extraction fan 13 is optimized and arranged on the side where the two closed plates 24 are close to each other, that is, in the area between the two buffer components. This position is directly above the narrow pouring channel formed by the bucket and the mixing tank 11 during material feeding, and is located above the core area of ​​dust generation. With this layout, the dust extraction fan 13 effectively captures the dust raised during the impact of the falling raw materials and promptly draws the dust-laden airflow that is about to escape from the narrow opening into the pipeline system, preventing it from spreading to the external environment.

[0036] refer to Figure 2 To ensure the rubber plate 25 maintains a stable vertical posture during operation, improves the reliability of its contact with the opposite buffer and the outer wall of the bucket, and prevents swaying and poor sealing due to insufficient weight, each rubber plate 25 is detachably connected to a counterweight 26 at its bottom. This increases its overall mass, enhances inertial stability during movement, and improves the contact force during sealing. As the closing plates 24 move towards each other, the rubber plate 25 equipped with the counterweight 26 falls more smoothly and contacts the contact surface under the assistance of gravity, effectively enhancing the dynamic sealing effect.

[0037] After the raw materials are poured out, the electric slide rail 22 is adjusted, and the guide frame 23 is moved backward and reset, causing the slide chute 231 to move backward synchronously. Under the joint guidance of the slide chute 231 and the annular slide, and under the action of the sliding protrusion 281, the rotating rod 28 rotates around the positioning post 2, ultimately causing the two closing plates 24 to slide back and forth along the arc-shaped guide groove 21, and the buffers on them open synchronously. The buffers on the two closing plates 24 are both far away from the bucket, forming a sufficiently large opening to facilitate the bucket's smooth exit from the mixing tank 11. Then, the electric slide rail 22 is adjusted again to make the buffers on the two closing plates 24 move towards each other and close, so that the mixing tank 11 is in a sealed state without openings, and then the mixing operation begins.

[0038] refer to Figure 3The rotating shaft 121 passes through the mixing frame 14 and extends upward. Three bearing plates 32 are sequentially keyed along the axial direction on the rotating shaft 121. The bearing plates 32 move with the mixing frame 14 and participate in the lifting, dispersing and mixing process of concrete materials. The bearing plates 32 have evenly distributed fan-shaped notches. The fan-shaped notches of the three bearing plates 32 are staggered to optimize the flow path of materials and enhance the rolling and mixing effect of materials during the mixing process. A scraper 3 is provided between two adjacent bearing plates 32 to remove raw materials adhering to the surface of the bearing plates 32, prevent raw materials from accumulating and clumping, and ensure mixing efficiency and homogeneity. The scraper 3 is slidably connected to the rotating shaft 121. The scraper 3 remains stationary during the mixing process and does not rotate with the mixing frame 14.

[0039] During operation, the raw materials are poured onto the surface of the upper support plate 32. The drive motor 12 starts, and the rotating shaft 121 rotates, driving the mixing frame 14 and the three support plates 32 to rotate. Since the scraper 3 is stationary, the rotating support plate 32 generates a shearing motion relative to the scraper 3. The scraper 3 effectively scrapes off the raw materials adhering to the surface of the support plate 32, and at the same time plays an auxiliary role in mixing and dispersing the materials falling through the fan-shaped notch.

[0040] Under the rotation and lifting of the support plate 32 and the scraping action of the scraper 3, the raw materials fall down step by step and are transferred to the mixing rack 14 area by the upper support plate 32, which improves the uniformity of the raw material dispersion, reduces the blind zone of mixing, and improves the overall mixing efficiency.

[0041] A scraper 31 is connected to the top of the three support plates 32. The scraper 31 has inclined surfaces at both ends and is attached to the inner side wall of the mixing tank 11. During the mixing process, as the mixing frame 14 rotates, the scraper 31 rotates synchronously to scrape off the raw materials adhering to the side wall of the mixing tank 11, so as to make full use of the raw materials, reduce residual waste, and avoid cleaning difficulties and increased equipment operating load caused by material accumulation.

[0042] refer to Figure 4 A reset rotating frame 4 is keyed to the rotating shaft 121. The reset rotating frame 4 is located at the bottom of the outer wall of the mixing tank 11 and is used for reset and transmission. Both ends of the reset rotating frame 4 are fixedly connected to pulleys 41. A mounting frame 45 is detachably connected to the support frame 1. Both ends of the mounting frame 45 are slidably connected to sliders 44. A compression spring 43 is compressed between the sliders 44 and the mounting frame 45. Two elastic steel wire ropes 42 are provided between the two sliders 44. The elastic steel wire ropes 42 are of fixed length and have a certain elasticity and tensile strength. The two elastic steel wire ropes 42 are respectively embedded in the grooves on the left and right sides of the pulleys 41 and are symmetrically wound to realize mechanical linkage.

[0043] During operation, the drive motor 12 starts, and the rotating shaft 121 rotates. Simultaneously, the reset rotating frame 4 and pulley 41 rotate synchronously. As the pulley 41 rotates, the elastic steel wire rope 42 is tightened in a controlled manner, and the slider 44 moves against the elastic force of the compression spring 43, causing the compression spring 43 to deform. When the mixing operation ends, the drive motor 12 is turned off, and the rotating shaft 121 stops rotating. At this time, the elastic potential energy stored in the compression spring 43 is released, pushing the slider 44 to slide back to its initial position along the mounting frame 45. The reset movement of the slider 44, through the elastic steel wire rope 42, pulls the pulley 41 in the opposite direction, causing it to rotate in the opposite direction, thereby driving the reset rotating frame 4 to rotate synchronously back to its initial position. This structure forms an automatic reset system with a mechanical energy storage and release mechanism. After shutdown, the key components are automatically returned to their original positions via elastic elements, requiring no additional power source control. The structure is simple and effectively ensures the safety of the equipment in non-operating states.

[0044] The mixing tank 11 has a discharge port on its side wall for orderly discharge of the concrete mixture after mixing. The discharge port is strategically positioned for easy connection with a hopper or transport equipment, ensuring smooth and efficient discharge and minimizing residue. The discharge port is equipped with an openable and closable sealing cover, which remains sealed during normal mixing to prevent material splashing and dust escape; it can be opened controllably during discharge to achieve precise material discharge, improving operational safety and efficiency.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An environmentally friendly dust removal device for concrete mixing, comprising a support frame (1), on which a mixing tank (11) is detachably mounted, a drive motor (12) is provided at the bottom of the mixing tank (11), a rotating shaft (121) is keyed to the output shaft of the drive motor (12), a mixing frame (14) is keyed to the rotating shaft (121), and the mixing frame (14) is rotatably disposed within the inner cavity of the mixing tank (11), characterized in that: In order to control the dust generated during the mixing process from the source and ensure the cleanliness of the working environment and the health of the operators, the mixing tank (11) is provided with a closed component that is controlled to open and close.

2. The environmentally friendly dust removal equipment for concrete mixing according to claim 1, characterized in that: The enclosed assembly includes an arc-shaped guide groove (21) formed on the top side edge of the mixing tank (11), with two symmetrically distributed closing plates (24) slidingly connected within the guide groove (21). An electric slide rail (22) is mounted on the top of the mixing tank (11), and a guide frame (23) slides on the electric slide rail (22). A positioning post (2) is fixed at the top axis of the mixing tank (11), and two rotating rods (28) arranged at an angle are rotatably connected to the positioning post (2). The free ends are respectively fixed to the top of the corresponding closed plate (24) to form a rotation linkage structure. Each of the rotating rods (28) is keyed with a sliding protrusion (281). The end of the guide frame (23) has two symmetrically distributed sliding grooves (231). The sliding protrusion (281) slides into the corresponding sliding groove (231). The top of the mixing tank (11) is also equipped with an annular guide frame (27) with an annular slide rail. The sliding protrusion (281) slides synchronously into this annular slide rail.

3. The environmentally friendly dust removal equipment for concrete mixing according to claim 2, characterized in that: The two closed plates (24) are detachably connected to multiple buffers on their adjacent edges. The buffers consist of a flexible rubber plate (25) and magnetic strips (251) fixed to the left and right sides of the rubber plate (25).

4. The environmentally friendly dust removal equipment for concrete mixing according to claim 2, characterized in that: The top of the mixing tank (11) is equipped with a dust extraction fan (13), which is connected to the external dust treatment system through a special pipe.

5. The environmentally friendly dust removal equipment for concrete mixing according to claim 1, characterized in that: Each of the rubber plates (25) has a counterweight (26) detachably connected to its bottom.

6. The environmentally friendly dust removal equipment for concrete mixing according to claim 2, characterized in that: The rotating shaft (121) passes through the stirring rack (14) and extends upward. Three bearing plates (32) are connected sequentially along the axial direction on the rotating shaft (121). The bearing plates (32) have evenly distributed fan-shaped notches. The fan-shaped notches of the three bearing plates (32) are staggered. A scraper (3) is provided in front of two adjacent bearing plates (32). The scraper (3) slides through the rotating shaft (121).

7. The environmentally friendly dust removal equipment for concrete mixing according to claim 6, characterized in that: The rotating shaft (121) passes through the top of the three bearing plates (32) and is connected to the scraper (31). The scraper (31) has inclined surfaces at both ends and is attached to the inner wall of the mixing tank (11).

8. The environmentally friendly dust removal equipment for concrete mixing according to claim 7, characterized in that: A reset rotating frame (4) is keyed to the rotating shaft (121). The reset rotating frame (4) is located at the bottom of the outer wall of the mixing tank (11). Both ends of the reset rotating frame (4) are fixed with pulleys (41). A mounting frame (45) is detachably connected to the support frame (1). Sliding blocks (44) are slidably connected to both ends of the mounting frame (45). A compression spring (43) is compressed between the sliding block (44) and the mounting frame (45). Two elastic steel wire ropes (42) are provided between the two sliding blocks (44). The two elastic steel wire ropes (42) are respectively embedded in the grooves on the left and right sides of the pulley (41) and are symmetrically wound.

9. The environmentally friendly dust removal equipment for concrete mixing according to claim 8, characterized in that: The mixing tank (11) has a discharge port on its side wall, and the discharge port is equipped with an openable and closable sealing cover.

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