A concrete dust collector

Abstract

The present application relates to the field of concrete dust removal technology, and in particular to a concrete dust collector, which includes a drying tank, an air supply assembly for providing high-temperature gas to the drying tank, and a collecting mechanism for collecting dried concrete dust, wherein the air supply assembly is arranged in the drying tank; the collecting mechanism includes a collecting barrel, a collecting filter bag, and a blocking valve, wherein one end of the collecting filter bag is connected to the air outlet end of the drying tank and fixedly connected to the inlet of the collecting barrel, the blocking valve is connected to the other end of the collecting filter bag, and the discharge end of the blocking valve is connected to a collecting member. The present application can effectively reduce the possibility of coagulation or adhesion of concrete dust during recovery.

Description

Technical Field

[0001] The present application relates to the field of concrete dust removal technology, and in particular to a concrete dust collector. Background Art

[0002] Concrete mixing station is mainly composed of five major systems including mixing host, material weighing system, material conveying system, material storage system and control system and other ancillary facilities. It is mainly used to produce concrete required for modern construction.

[0003] In the production process of concrete, it is often necessary to add cement (including cementitious materials such as mineral powder and fly ash), aggregates (sand, stone, ceramsite, etc.), water and admixtures into the main mixer for mixing. After sufficient mixing, concrete is formed, and then it is transported to the construction site for construction. However, in actual production, cement (including cementitious materials such as mineral powder and fly ash), aggregates (sand, stone, ceramsite, etc.), water and admixtures will be stored in the material storage system first. During the production process, the cement (including cementitious materials such as mineral powder and fly ash), aggregates (sand, stone, ceramsite, etc.), water and admixtures stored in the material storage system are transported to the material weighing system through the material conveying system to form a certain ratio, and then transported to the main mixer for mixing. Therefore, a large amount of dust will be generated during the production process.

[0004] In the prior art, in order to remove dust at the mixing station site, bag dust collectors are often used to remove concrete dust generated by the mixing of various powders at the main mixer, and the generated concrete dust is collected, and the dust can be recycled and reused. However, when collecting dust through bag dust collectors, since water is mixed in the main mixer for stirring, the concrete dust collected by the bag dust collector often contains a certain amount of moisture, resulting in the concrete dust being easily adhered to and fixed to the filter bag of the bag dust collector after being collected by the filter bag of the bag dust collector, and the filter bag is blocked, and the filter bag often needs to be replaced frequently. Therefore, how to reduce the adhesion of concrete dust is an urgent problem to be solved in mixing stations. Summary of the invention

[0005] In order to reduce the possibility of adhesion during concrete dust collection, the present application provides a concrete dust collector.

[0006] The present application provides a concrete dust collector, which adopts the following technical solution:

[0007] A concrete dust collector comprises a drying tank for collecting wet concrete dust, an air supply assembly for providing high-temperature gas to the drying tank, and a collecting mechanism for collecting dried concrete dust, wherein the air supply assemblies are all arranged in the drying tank; the collecting mechanism comprises a collecting barrel, a collecting filter bag and a blocking valve, one end of the collecting filter bag is connected to the air outlet end of the drying tank and is fixedly connected to the inlet of the collecting barrel, the blocking valve is connected to the other end of the collecting filter bag, and the discharge end of the blocking valve is connected to a collecting member.

[0008] By adopting the above technical scheme, the moist concrete dust will enter the drying tank, and the air supply component will provide high-temperature gas to dry the moist concrete dust. The dried concrete dust and gas will flow into the receiving filter bag connected to the receiving barrel. At this time, the blocking valve is closed, and the concrete dust and gas are separated by the receiving filter bag. After filtering for a period of time, the blocking valve is opened to discharge the gas in the receiving filter bag into the receiving part, and the filtered concrete dust enters the receiving part at the same time, and then the blocking valve is closed. The concrete dust in the receiving part can be collected after sedimentation without closing the drying tank, and the concrete dust generated by filtration in the receiving filter bag can be fully collected. In addition, during the opening of the blocking valve, the change in air pressure will also cause the receiving filter bag to shrink, so as to reduce the possibility of concrete dust adhering to the receiving filter bag, thereby relatively fully collecting the concrete dust and effectively reducing the frequency of replacing the receiving filter bag.

[0009] Optionally, the material collection filter bag is covered with and fixedly connected with a plurality of material collection limiting rings having a diameter smaller than that of the material collection filter bag, the plurality of material collection limiting rings are distributed along the length direction of the material collection filter bag and the material collection limiting rings are fixedly connected to the inner wall of the material collection barrel.

[0010] The inner wall of the material receiving barrel is fixedly connected with a blocking piece which divides the inner cavity into a filter cavity and a recovery cavity. The material receiving filter bag is located in the filter cavity. The material receiving piece is arranged in the recovery cavity. The blocking piece is used to block the airflow between the filter cavity and the recovery cavity. The material receiving barrel is provided with a back-blowing piece for back-blowing gas into the filter cavity. The material receiving barrel is fixed with a drying valve connected to the filter cavity.

[0011] By adopting the above technical solution, when the blocking valve is opened, the drying valve is closed, and the gas is back-blown through the back-blowing piece, which will cause the pressure in the filter chamber to increase relatively quickly; at the same time, due to the restriction of the material collection restriction ring, the material collection filter bag will shrink and vibrate, and at the same time, with the gas of the back-blowing piece, the concrete dust adhered to the inner wall of the material collection filter bag is fully blown into the material collection piece for collection, so as to reduce the impact on the drying tank while fully completing the extraction of concrete dust.

[0012] Optionally, the back-blowing component includes an air compressor and a back-blowing pipe connected to an air outlet of the air compressor, and the back-blowing pipe is connected to the filter chamber.

[0013] By adopting the above technical solution, when back-blowing is performed, it is only necessary for the air compressor to pass the pressurized gas into the filter chamber through the back-blowing pipe.

[0014] Optionally, the material receiving part includes a material receiving bag and a material receiving tube, the material receiving bag is made of elastic material and one end of the material receiving bag is fixed by a blocking piece and connected to the material receiving filter bag, the other end of the material receiving bag is fixed and connected to the material receiving tube, the material receiving tube is slidably connected to the inner wall of the recovery chamber, and the material receiving tube is provided with a discharge valve for discharging materials.

[0015] By adopting the above technical solution, when the blocking valve is opened, the collecting bag will extend to adapt to the pressure change when the gas is introduced, and then the concrete dust will be collected through the collecting pipe to reduce the possibility of concrete dust adhering to the collecting bag and being inconvenient to collect.

[0016] Optionally, the discharge end of the material receiving barrel is provided with a limiting member for limiting the material receiving tube from shrinking following the material receiving bag, the limiting member includes a magnetic suction cup fixedly connected to the discharge port of the recovery chamber corresponding to the material receiving barrel, a limiting pin slidably arranged on the material receiving tube and a contraction spring for driving the limiting pin to shrink, the two ends of the contraction spring are respectively connected to the limiting pin and the material receiving tube, the material receiving barrel is fixedly connected with a limiting seat for plugging and cooperating with the limiting pin, the magnetic suction cup is arranged on the limiting seat and is used to absorb the limiting pin and plug it into the limiting seat.

[0017] By adopting the above technical solution, when the collecting bag is extended when the blocking valve is opened, the magnetic suction cup will maintain magnetic adsorption, and when the collecting tube slides to the discharge end of the recovery chamber, the magnetic suction cup will suck out the limiting pin and plug it into the limiting seat, thereby completing the sliding locking of the collecting tube to facilitate the collection of concrete dust; when collection is not needed, the magnetic suction cup cancels the adsorption of the limiting pin, and at this time the contraction spring will cause the limiting pin to contract, thereby contracting the collecting bag.

[0018] Optionally, the material receiving bag includes an expansion part distributed along the expansion direction and an exhaust part fixedly connected to one end of the expansion part away from the filter chamber, the end of the expansion part away from the exhaust part is fixed and connected to the material receiving filter bag, and the expansion part is a corrugated pipe, and the exhaust part is made of filter cloth and the end away from the expansion part is fixed and connected to the material receiving pipe.

[0019] By adopting the above technical solution, when the blocking valve is opened, the extension of the telescopic part can adapt to the pressure change, and at the same time, the gas is discharged through the exhaust part and the concrete dust is filtered to realize the collection of concrete dust; compared with the collection bag being made entirely of filter cloth, it can effectively reduce the possibility of concrete dust adhering to the gap between the filter holes on the filter cloth, resulting in the inability to collect concrete dust, thereby reducing the influence of adhesion on the collection of concrete dust.

[0020] Optionally, the material receiving tube is provided with a connecting piece for sliding connection to the material receiving barrel, the connecting piece includes a connecting rod and a connecting spring, a connecting flange is formed on the edge of the material receiving tube, the connecting rod is passed through and slidably connected to the connecting flange, the connecting rod is parallel to the sliding direction of the material receiving tube, and the connecting rod is fixedly connected to the material receiving barrel, and the two ends of the connecting spring are respectively fixedly connected to the material receiving tube and the material receiving barrel and are used to drive the material receiving tube to slide toward the filter chamber.

[0021] By adopting the above technical solution, the receiving tube is connected to the connecting rod through the connecting flange, which can guide the sliding of the receiving tube and buffer the extension of the receiving tube through the connecting spring; and the receiving tube is pulled toward the filter chamber with the assistance of the connecting spring, so that the telescopic part remains in a contracted state when the blocking valve is not opened, so as to adapt to the pressure changes during concrete dust extraction.

[0022] Optionally, the drying tank is provided with a recovery component for extracting concrete dust gas, the recovery component includes a recovery tank and a recovery pump, the recovery tank is used to connect to the concrete dust discharge end of the mixing host, the recovery tank is connected to the drying tank through the recovery pump, and the recovery tank is provided with an electrostatic eliminator for removing static electricity.

[0023] By adopting the above technical solution, when in use, the drying tank will initially collect the wet concrete dust and remove the static electricity through the static eliminator, and then transport it to the drying tank for drying through the recovery pump to reduce the possibility of dust explosion hazard caused by static electricity.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. When removing concrete dust, the wet concrete dust will enter the drying tank, and the air supply component will provide high-temperature gas to dry the wet concrete dust. The dried concrete dust and gas will flow into the receiving filter bag connected to the receiving barrel. At this time, the blocking valve is closed, and the concrete dust and gas are separated by the receiving filter bag. After filtering for a period of time, the blocking valve is opened to discharge the gas in the receiving filter bag into the receiving part, and the filtered concrete dust enters the receiving part at the same time, and then the blocking valve is closed. The concrete dust in the receiving part can be collected after sedimentation without closing the drying tank, and the concrete dust generated by the filtration in the receiving filter bag can be fully collected. In addition, during the opening of the blocking valve, the change in air pressure will also cause the receiving filter bag to shrink, so as to reduce the possibility of concrete dust adhering to the receiving filter bag, thereby relatively fully collecting the concrete dust and effectively reducing the frequency of replacing the receiving filter bag.

[0026] 2. At the same time, when separating and filtering concrete dust, the concrete dust can also be collected by opening and closing the blocking valve and telescopic filtering of the receiving piece, so as to achieve uninterrupted filtration and relatively sufficient collection of concrete dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0028] Figure 2 It is a schematic cross-sectional structural diagram of the material receiving mechanism in the embodiment of the present application.

[0029] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part A.

[0030] Description of reference numerals: 1. drying tank; 11. recovery part; 111. recovery tank; 112. recovery pump; 113. static eliminator; 2. agitator; 3. air supply assembly; 31. air supply pump; 32. gas heater; 4. material receiving mechanism; 41. material receiving barrel; 411. drying valve; 412. filter chamber; 413. recovery chamber; 414. connecting ring; 42. material receiving filter bag; 421. material receiving limiting ring; 43. blocking valve; 44. material receiving part; 441. material receiving bag; 442. material receiving pipe; 443 , discharge valve; 444, telescopic part; 445, exhaust part; 446, connecting flange; 45, blocking piece; 451, first blocking ring; 452, second blocking ring; 46, back-blowing piece; 461, air compressor; 462, back-blowing pipe; 463, back-blowing valve; 47, limiting piece; 471, magnetic suction cup; 472, limiting pin; 473, contraction spring; 474, limiting seat; 475, connecting seat; 476, photoelectric switch; 48, connecting piece; 481, connecting rod; 482, connecting spring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application embodiment discloses a concrete dust collector. Figure 1 A concrete dust collector comprises a drying tank 1, a stirrer 2, an air supply assembly 3 and a material collection mechanism 4. The stirrer 2 is arranged on the top of the drying tank 1 and is used to mix the collected wet dust with the gas provided by the air supply assembly 3. The air supply assembly 3 is used to provide the drying tank 1 with gas with a certain temperature, and the material collection mechanism 4 is used to recover the concrete powder dust generated after drying.

[0033] The side of the drying tank 1 is provided with a recovery part 11 for extracting concrete dust gas. The recovery part 11 includes a recovery tank 111 and a recovery pump 112. The recovery tank 111 is used to collect moist concrete dust gas and preliminarily remove static electricity. Specifically, the recovery tank 111 is fixedly connected with an electrostatic eliminator 113 for removing static electricity. The electrostatic elimination end of the electrostatic eliminator 113 is arranged inside the recovery tank 111. The main body of the electrostatic eliminator 113 is penetrated through the recovery tank 111 and sealed. When in use, the recovery tank 111 is connected to the inside of the mixer through a pipeline to recover moist dust. The air inlet end of the recovery pump 112 is connected to the air outlet end of the recovery tank 111 through a pipeline, and the air outlet end of the recovery pump 112 is connected to the air inlet end of the mixer 2 through a pipeline.

[0034] Reference Figure 1 and Figure 2 The air supply assembly 3 includes an air supply pump 31 and a gas heater 32. The output end of the air supply pump 31 is connected to the air inlet end of the gas heater 32 through a pipeline. The air outlet end of the gas heater 32 is connected to the top of the drying tank 1 through a pipeline and is arranged corresponding to the agitator 2 to mix the moist dust gas with the high-temperature gas and dry the moist gas.

[0035] The material receiving mechanism 4 includes a vertically arranged material receiving barrel 41, a material receiving filter bag 42 and a blocking valve 43. The upper end of the material receiving barrel 41 is closed, and the air outlet end of the drying tank 1 is fixed and connected to the top of the material receiving barrel 41 through a pipeline. A blocking member 45 is arranged in the middle of the material receiving barrel 41. The blocking member 45 separates the inner cavity of the material receiving barrel 41 into a filter cavity 412 and a recovery cavity 413 which are distributed from top to bottom. The blocking valve 43 is arranged on the blocking member 45 and is used to control the on-off of the filter cavity 412 and the recovery cavity 413.

[0036] Reference Figure 1 and Figure 2The wall of the filter chamber 412 is provided with an exhaust port for exhausting gas, and the opening edge of the exhaust port is fixedly connected with a dry valve 411 for connecting to the outside. The dry valve 411 is a solenoid valve for controlling the connection and disconnection between the filter chamber 412 and the outside. The collecting filter bag 42 is tubular, and the opening edge of one end thereof is fixedly connected to the inner wall at the top of the filter chamber 412 and is used to receive the dust gas discharged from the drying tank 1. The opening edge of the other end of the collecting filter bag 42 is fixed and connected to the air inlet of the blocking valve 43 through a blocking piece 45, and the discharge end of the blocking valve 43 is connected with a collecting piece 44 for collecting the dust generated when the concrete in the collecting filter bag 42 is mixed.

[0037] Reference Figure 2 and Figure 3 Specifically, the blocking member 45 includes a first blocking ring 451 and a second blocking ring 452. The outer ring edge of the first blocking ring 451 is fixedly connected to the inner wall of the material receiving barrel 41 and is used to separate the filter chamber 412 and the recovery chamber 413. The blocking valve 43 is located between the first blocking ring 451 and the second blocking ring 452. The opening edge of the material receiving filter bag 42 facing the blocking valve 43 is clamped between the inner ring edge of the first blocking ring 451 and the edge of the material inlet of the blocking valve 43, and the first blocking ring 451 is fastened to the edge of the material inlet of the blocking valve 43 by bolts, so as to connect the material receiving filter bag 42 to the blocking valve and separate the filter chamber 412 and the recovery chamber 413. Among them, the material receiving member 44 is connected to the discharge end of the blocking valve 43 through the second blocking ring 452.

[0038] Reference Figure 2 and Figure 3 At the same time, in order to reduce the influence of concrete dust adhering to the collecting filter bag 42 on the filtering effect of the collecting filter bag 42 and the sufficient collection of concrete dust, a plurality of collecting limiting rings 421 are fixedly connected to the outer wall of the collecting filter bag 42, and the plurality of collecting limiting rings 421 are vertically distributed and arranged on the same central axis of the collecting barrel 41. The outer ring edge of the collecting limiting ring 421 is connected to the inner wall of the filter cavity 412 through a plurality of connecting shafts, so as to fix the collecting filter bag 42. The outer wall of the collecting barrel 41 is provided with a back-blowing member 46 for back-blowing the filter cavity 412.

[0039] When collecting concrete dust, the blocking valve 43 is closed, and the drying valve 411 is opened, so that the concrete dust is filtered by the collecting filter bag 42, and the part of the collecting filter bag 42 located between the two adjacent collecting limiting rings 421 will expand outward; and when collecting, the pipe wall drying valve 411 opens the blocking valve 43 and blows gas back into the filter cavity 412 through the back-blowing member 46, which will cause the part of the collecting filter bag 42 located between the two adjacent collecting limiting rings 421 to shrink, and cooperate with the back-blowing gas The concrete dust is fully blown off from the inner wall of the collecting filter bag 42 through the collecting filter bag 42, and the possibility of concrete dust adhering to the collecting filter bag 42 due to moisture is reduced through the contraction of the collecting filter bag 42 during the contraction process, so that the concrete dust in the collecting filter bag 42 is fully transported to the collecting part 44 along with the gas for collection, and then the blocking valve 43 is closed and the drying valve 411 is opened to continue filtering the concrete dust, thereby achieving uninterrupted collection while reducing the possibility of concrete dust not being completely collected due to airflow disturbance.

[0040] Reference Figure 2 and Figure 3 The back-blowing component 46 includes an air compressor 461, a back-blowing pipe 462, and a back-blowing valve 463 disposed on the back-blowing pipe 462, and the back-blowing valve 463 is used to open or close the back-blowing pipe 462. The air compressor 461 is fixedly connected to the outer wall of the material receiving barrel 41, and the air outlet end of the air compressor 461 is fixedly connected to and connected to the back-blowing pipe 462, and the other end of the back-blowing pipe 462 is fixedly connected to the material receiving barrel 41 and connected to the filter chamber 412, so as to perform back-blowing, so that the concrete dust is separated from the inner wall of the material receiving filter bag 42.

[0041] Reference Figure 2 and Figure 3The receiving part 44 includes a receiving bag 441 and a receiving tube 442. The receiving bag 441 includes a telescopic part 444 and an exhaust part 445 which are distributed from top to bottom. The telescopic part 444 is a tubular structure, and the exhaust part 445 is an annular structure. The telescopic part 444 is a bellows made of sealing material to achieve the function of telescopic receiving. The exhaust part 445 is made of filter cloth to reduce the possibility of concrete dust being adsorbed on the inner wall of the telescopic part 444 due to air pressure, so that the receiving bag 441 can collect concrete dust while adapting to the pressure change when the blocking valve 43 is opened. The upper opening edge of the telescopic part 444 is clamped between the second blocking ring 452 and the opening edge of the discharge port of the blocking valve 43 and fastened by bolts. The lower opening edge of the telescopic part 444 is coaxially fixedly connected to the upper opening edge of the exhaust part 445, and the lower opening edge of the exhaust part 445 is coaxially fixedly connected to the upper opening edge of the receiving tube 442. Among them, the length of the telescopic part 444 is L1, the axial length of the exhaust part 445 is L2, and L1 / L2>5, so that when the blocking valve 43 is opened, it can exhaust through the exhaust part 445 while driving the receiving tube 442 and the telescopic part 444 to extend.

[0042] The collecting pipe 442 is slidably connected to the inner wall of the recovery chamber 413 through a connecting piece 48, and one end of the collecting pipe 442 away from the exhaust portion 445 is funnel-shaped and is provided with a discharge valve 443 for discharging the collected concrete dust.

[0043] When in use, the discharge valve 443 is closed. When the blocking valve 43 is opened, the gas will be discharged through the exhaust part 445, and the telescopic part 444 and the receiving pipe 442 will be extended, so as to fully collect the gas and concrete dust discharged from the filter chamber 412. After the blocking valve 43 is closed, since there is no disturbance of the gas introduced from the drying tank 1, the relative components of the concrete dust will be precipitated in the receiving pipe 442, so as to fully extract the concrete dust. Finally, the concrete dust can be taken out by opening the discharge valve 443, so as to fully recycle the concrete dust.

[0044] Reference Figure 2 and Figure 3Specifically, the edge of the receiving tube 442 connected to the exhaust portion 445 is fixedly connected with a connecting flange 446. A plurality of connecting members 48 are provided and are arranged around the receiving tube 442. The connecting member 48 includes a connecting rod 481 and a connecting spring 482. The connecting rod 481 is parallel to the receiving tube 442, and one end of the connecting rod 481 is fixedly connected to the first blocking ring 451. The other ends of the plurality of connecting rods 481 are fixedly connected with a connecting ring 414. The outer ring of the connecting ring 414 is fixedly connected to the inner wall of the recovery chamber 413, so as to fix the connecting rod 481 to the receiving barrel 41. The connecting ring 414 is located on the side of the connecting flange 446 away from the filter chamber 412, so as to limit the expansion and contraction of the receiving tube 442.

[0045] Reference Figure 2 and Figure 3 The connecting spring 482 is sleeved on the connecting rod 481, and the two ends of the connecting spring 482 are respectively fixedly connected to the first blocking ring 451 and the connecting flange 446, so that the two ends of the connecting spring 482 are respectively fixedly connected to the inner wall of the collecting barrel 41 and the collecting pipe 442, and are used to drive the collecting pipe 442 to shrink toward the filter chamber 412, so that when the blocking valve 43 is opened, the telescopic part 444 and the collecting pipe 442 can be extended, so that the gas can enter the telescopic part 444 and the exhaust part 445 in time, and collect the concrete dust. At the same time, the connecting spring 482 can also be used to make the collecting pipe 442 slide toward the filter chamber 412, so that the telescopic part 444 can remain in a contracted state when the blocking valve 43 is not opened.

[0046] In addition, in order to facilitate opening of the discharge valve 443 to collect the concrete dust, a limiting member 47 is further provided in the collecting barrel 41 to limit the sliding of the collecting pipe 442 .

[0047] Reference Figure 2 and Figure 3 The limiting member 47 includes a limiting pin 472 that is slidably arranged relative to the connecting flange 446, a magnetic suction cup 471 that is fixedly connected to the material receiving barrel 41 through a connecting ring 414, and a contraction spring 473. The connecting flange 446 is fixedly connected to a connecting seat 475. The limiting pin 472 is T-shaped and its small end is arranged away from the center of the connecting flange 446. The small end of the limiting pin 472 is penetrated and slidably connected to the connecting seat 475. The limiting pin 472 is made of magnetic metal, such as steel, and the sliding direction of the limiting pin 472 passes through the center of the connecting flange 446 and is parallel to the connecting flange 446. The contraction spring 473 is sleeved on the limiting pin 472, and the two ends of the contraction spring 473 are respectively fixedly connected to the limiting pin 472 and the connecting seat 475, so as to drive the limiting pin 472 to slide toward the center of the connecting flange 446.

[0048] Reference Figure 2 and Figure 3, the magnetic suction cup 471 is fixedly connected to the connecting ring 414, and the magnetic suction cup 471 is an electromagnetic suction cup, and of course, it can also be a permanent magnetic suction cup. At the same time, the material receiving barrel 41 is provided with a limiting seat 474 for plugging and matching the limiting pin 472, and the limiting seat 474 is fixedly connected to the material receiving barrel 41 through the connecting ring 414. The limiting seat 474 is provided with a plug-in hole for matching the limiting pin 472, and the magnetic suction cup 471 is located on the side of the limiting seat 474 away from the connecting flange 446, so as to suck out the limiting pin 472 and plug it into the limiting seat 474, thereby limiting the sliding of the material receiving tube 442, and facilitating the collection of concrete dust. Among them, a photoelectric switch 476 is also provided on the top of the limiting seat 474 for sensing the passage of the receiving tube 442 and controlling the opening and closing of the magnetic suction cup 471, so as to detect whether the connecting flange 446 on the receiving tube 442 is in contact with the connecting ring 414. If the connecting flange 446 is in contact with the connecting ring 414, the photoelectric switch 476 senses and controls the opening of the magnetic suction cup 471, and sucks out the limiting pin 472 and inserts it into the limiting seat 474, so as to realize the sliding locking of the receiving tube 442. At the same time, after the concrete dust is collected, only the magnetic suction cup 471 on the tube wall is needed.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A concrete dust collector, characterized in that: It includes a drying tank for collecting wet concrete dust, an air supply assembly for providing high-temperature gas to the drying tank, and a collecting mechanism for collecting dried concrete dust, wherein the air supply assembly is arranged in the drying tank; The material receiving mechanism comprises a material receiving barrel, a material receiving filter bag and a blocking valve, one end of the material receiving filter bag is connected to the air outlet end of the drying tank and is fixedly connected to the material inlet of the material receiving barrel, the blocking valve is connected to the other end of the material receiving filter bag, and the material outlet end of the blocking valve is connected to the material receiving member; The material collecting filter bag is provided with a plurality of material collecting limiting rings with a diameter smaller than that of the material collecting filter bag and fixedly connected thereto. The plurality of material collecting limiting rings are distributed along the length direction of the material collecting filter bag and are fixedly connected to the inner wall of the material collecting barrel. The inner wall of the material receiving barrel is fixedly connected with a blocking piece that divides the inner cavity into a filter cavity and a recovery cavity. The material receiving filter bag is located in the filter cavity. The material receiving piece is arranged in the recovery cavity. The blocking piece is used to block the airflow of the filter cavity and the recovery cavity. The material receiving barrel is provided with a back-blowing piece for back-blowing gas into the filter cavity. The material receiving barrel is fixed with a drying valve connected to the filter cavity. The material receiving part includes a material receiving bag and a material receiving pipe. The material receiving bag is made of elastic material and one end of the material receiving bag is fixed and connected to the material receiving filter bag through a blocking piece. The other end of the material receiving bag is fixed and connected to the material receiving pipe. The material receiving pipe is slidably connected to the inner wall of the recovery chamber, and the material receiving pipe is provided with a discharge valve for discharging materials. The discharge end of the material receiving barrel is provided with a limiting member for limiting the material receiving tube to follow the contraction of the material receiving bag, the limiting member comprises a magnetic suction cup fixedly connected to the discharge port of the recovery chamber corresponding to the material receiving barrel, a limiting pin slidably arranged on the material receiving tube and a contraction spring for driving the limiting pin to contract, the two ends of the contraction spring are respectively connected to the limiting pin and the material receiving tube, the material receiving barrel is fixedly connected with a limiting seat for plugging and matching the limiting pin, the magnetic suction cup is arranged on the limiting seat and is used to absorb the limiting pin and plug it into the limiting seat; The material receiving bag comprises a telescopic part distributed along the telescopic direction and an exhaust part fixedly connected to one end of the telescopic part away from the filter cavity, the end of the telescopic part away from the exhaust part is fixed and connected to the material receiving filter bag, and the telescopic part is a corrugated pipe, the exhaust part is made of filter cloth and the end away from the telescopic part is fixed and connected to the material receiving pipe; The material receiving tube is provided with a connecting piece for sliding connection to the material receiving barrel, and the connecting piece includes a connecting rod and a connecting spring. A connecting flange is formed on the edge of the material receiving tube, and the connecting rod is passed through and slidably connected to the connecting flange. The connecting rod is parallel to the sliding direction of the material receiving tube, and the connecting rod is fixedly connected to the material receiving barrel. The two ends of the connecting spring are respectively fixedly connected to the material receiving tube and the material receiving barrel and are used to drive the material receiving tube to slide toward the filter chamber.

2. A concrete dust collector according to claim 1, characterized in that: A stirrer is arranged on the top of the drying tank, and the stirrer is used to mix concrete dust and high-temperature gas.

3. A concrete dust collector according to claim 1, characterized in that: The back-blowing component comprises an air compressor and a back-blowing pipe connected to an air outlet of the air compressor, and the back-blowing pipe is connected to a filter cavity.

4. A concrete dust collector according to claim 1, characterized in that: The drying tank is provided with a recovery part for extracting concrete dust gas, the recovery part includes a recovery tank and a recovery pump, the recovery tank is used to connect to the concrete dust discharge end of the mixing host, the recovery tank is connected to the drying tank through the recovery pump, and the recovery tank is provided with an electrostatic eliminator for removing static electricity.

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