Dust removal device for concrete raw material mixing

Abstract

The utility model provides a dust removal device for mixing concrete raw materials, which belongs to the technical field of concrete processing equipment and comprises a stirring tank, a feeding pipe and a stirring motor are arranged at the top of the stirring tank, a stirring shaft is arranged in the stirring tank and is connected with a stirring motor shaft, a filtering mechanism is mounted at the top of the stirring tank, and an ash discharge port is arranged at the bottom of the filtering mechanism. An exhaust opening is formed in the top of the filtering mechanism, an air suction pipe is arranged on the exhaust opening, the other end of the air suction pipe is connected with a vacuum pump, a feeding opening is formed in the side wall of the filtering mechanism, and the feeding opening is connected with a feeding hopper through a pipe type spiral conveyor; the vacuum pump and the filtering mechanism are adopted, dust can be removed through dust suction and filtering, dust overflowing is prevented, raw materials are filtered through the filtering mechanism after passing through the feeding hopper and the pipe type spiral conveyor, large-particle heavy-mass dry aggregate can be conveyed, small-particle light-mass cementing materials or additives can be conveyed, and the conveying efficiency is improved. Dust can enter the stirring tank when the filtering mechanism is cleaned, so that the dust removal procedure does not influence the proportion of the dry-mixed concrete raw materials.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete processing equipment, and particularly relates to a dry-mix concrete mixing dust removal device. Background Art

[0002] Dry-mix concrete is a mixture of cement, dry aggregate, powder, admixture, etc. prepared according to a predetermined ratio in another area away from the construction site. After being transported to the construction site, the construction personnel only need to add water and stir it in proportion to use, which improves the construction efficiency. Secondly, because it does not contain water, dry-mix concrete can be stored for a long time and transported over a long distance under dry conditions, reducing the problems of leakage pollution, water evaporation or condensation that may occur during the storage and transportation of wet-mix concrete. At the same time, the proportion of raw materials is produced according to national standards or specific engineering requirements, which is more scientific and effectively improves the application quality and application level of mortar in construction projects. Therefore, it has been widely used in construction project construction at present. However, since the production process of dry-mix concrete needs to keep the mixture in a dry state, a large amount of dust will be generated during the mixing process and the bulk or packaging process, resulting in a poor working environment.

[0003] Chinese Patent No.: ZL201620510586.0 discloses a premixed concrete admixture homogenizing device, which includes a homogenizing bin. The bin cover of the homogenizing bin is provided with a feed inlet and an exhaust port, and a dust collector is provided at the exhaust port; an annular inflation pipeline is fixedly arranged on the inner side of the wall at the lower part of the homogenizing bin. A plurality of inflation holes are opened on the inner wall of the inflation pipeline, and an intake pipeline for charging compressed gas is connected to the inflation pipeline; an automatically controlled push-pull type sealing device is provided at the discharge port of the homogenizing bin. This technical solution makes the powder in the homogenizing bin fluidized by charging compressed gas to achieve the purpose of mixing and homogenizing the powder in the homogenizing bin. By adopting the automatically controlled push-pull type sealing device, the sealing at the discharge port is good and there will be no air leakage during the mixing and homogenizing process; it is convenient to open and close, and the discharging speed is fast, preventing the humid gas in the concrete mixer from entering the homogenizing bin during the discharging process. However, in this technical solution, there is no feeding device. When in use, a variety of raw materials need to be manually poured into the homogenizing bin, resulting in serious dust dispersion during manual feeding. Secondly, during the process of fluidizing the powder in the homogenizing bin by charging compressed gas, some raw materials will adhere to the dust collector at the exhaust port and are not used for mixing. When adding admixtures with a very small content, it will cause changes in the proportion of raw materials and affect the scientific proportion of concrete. Summary of the Invention

[0004] The technical problems to be solved by the present utility model are how to prevent the dust removal process during concrete mixing from affecting the raw material ratio, and how to reduce the problem that dust is easily dispersed during the feeding process. The purpose of the present utility model is to provide a dust removal device for mixing concrete raw materials, which combines vacuum adsorption feeding with a tubular screw conveyor for feeding, can suck air and remove dust while feeding, and can send the dust in the filtering mechanism to the mixing tank to be mixed with other raw materials when cleaning the dust after feeding is completed.

[0005] The technical solution adopted by the present utility model is: a dust removal device for mixing concrete raw materials, including a mixing tank, an inlet pipe and a mixing motor are arranged at the top of the mixing tank, a mixing shaft is arranged inside the mixing tank, and the mixing shaft is connected to the shaft of the mixing motor. A filtering mechanism is installed at the top of the mixing tank, a dust discharge port is arranged at the bottom of the filtering mechanism, and the dust discharge port is communicated with the inlet pipe at the top of the mixing tank. An air suction port is arranged at the top of the filtering mechanism, an air suction pipe is arranged on the air suction port, and the other end of the air suction pipe is connected to a vacuum pump. A feeding port is arranged on the side wall of the filtering mechanism, and the feeding port is connected to a feeding hopper through a tubular screw conveyor.

[0006] By using the dust removal device for mixing concrete raw materials provided by the present utility model, the following beneficial effects can be obtained:

[0007] (1) By using a vacuum pump and a filtering mechanism, dust can be removed by dust suction and filtration during the feeding, mixing and discharging processes, preventing dust from overflowing and affecting the working environment of the production area.

[0008] (2) The raw materials first enter the filtering mechanism through the feeding hopper and the tubular screw conveyor. The dust adsorbed by the filtering mechanism falls downward and enters the mixing tank from the dust discharge port. The dust blocked by the filtering mechanism can also fall into the mixing tank from the dust discharge port when cleaning the filtering mechanism, ensuring that the dust removal process will not affect the ratio of the dry-mixed concrete raw materials.

[0009] (3) By using a tubular screw conveyor, it can not only transport some large-particle and heavy dry aggregates to the mixing tank, but also transport powder materials such as small-particle and light-weight cementitious materials, admixtures, and preservatives in combination with the suction force of the vacuum pump, reducing dust leakage during the feeding stage with the most dust, greatly improving the working efficiency during feeding, and improving the working environment of the feeding area.

[0010] Preferably, the filtering mechanism includes a housing, a mounting plate is arranged in the middle of the inner side of the housing, a plurality of through holes are evenly distributed on the mounting plate, filter bags are installed in the through holes, support skeletons are installed in the filter bags, and the openings at the tops of the filter bags are detachably and fixedly connected to the mounting plate through the support skeletons.

[0011] The installation plate inside the housing facilitates the installation of the filter bag, and the support framework facilitates the fixation of the filter bag. At the same time, the support framework can prevent the surface area of the filter bag from decreasing due to deformation when the vacuum pump sucks air from the outside of the filter bag to the inside, thus affecting the filtration effect.

[0012] Preferably, a plurality of pleats are evenly distributed on the side wall of the filter bag. A reinforcing band is provided at the outer edge of the pleats in the middle of the filter bag, and the outermost sides of the plurality of pleats are sequentially connected by an annular reinforcing band.

[0013] The multiple pleats on the side wall of the filter bag can increase the filtration area and improve the filtration efficiency. At the same time, during reverse blowing and dust cleaning, the deformation of the pleats can be used to quickly remove the dust adhering to the surface of the filter belt; the reinforcing band prevents the filter belt from expanding excessively during pulse jet cleaning.

[0014] Preferably, the support framework includes a plurality of longitudinally arranged support rods arranged in a ring and fixing rings arranged at equal intervals along the vertical direction in the middle of the support framework. The fixing rings and the longitudinally arranged support rods are fixedly connected by a plurality of axially arranged support rods.

[0015] The longitudinally arranged support rods on the support framework can keep the filter belt in shape when adsorbing dust, preventing the filter belt from deforming and resulting in a reduction in the filtration area. The fixing rings and the axially arranged support rods facilitate fixing the positions and shapes of the plurality of longitudinally arranged support rods, and at the same time do not affect the deformation of the filter bag.

[0016] Preferably, a funnel-shaped first ash hopper is provided below the installation plate, a funnel-shaped second ash hopper is provided below the first ash hopper, and the feed inlet is arranged on the side wall between the first ash hopper and the second ash hopper.

[0017] The first ash hopper facilitates receiving the dust falling from the surface of the filter bag during pulse jet cleaning, enabling it to fall back into the mixing tank from the ash discharge port along the first ash hopper. The second ash hopper facilitates temporarily storing the raw materials transported in through the tubular screw conveyor on the second ash hopper. During mixing, the raw materials are discharged from the ash discharge port and then into the mixing tank. The first ash hopper is used to prevent the raw materials falling downward from the second ash hopper from being adsorbed upward, reducing the working pressure of the filter belt.

[0018] Preferably, an air bag is provided on the outer side wall of the housing. A plurality of jet pipes are provided on the air bag. After passing through the housing, the jet pipes extend into the housing, and jet nozzles are provided at the bottoms of the jet pipes facing the center of the opening at the top of the filter bag.

[0019] The air bag, the jet pipes, and the jet nozzles on the jet pipes facilitate using pulse jet to perform reverse blowing and dust cleaning on all filter bags. Through reverse blowing and the expansion of the filter belt, the dust adhering to the surface of the filter belt is blown off and shaken off, facilitating the restoration of the filtration performance of the filter bag.

[0020] Preferably, the ash discharge port is arranged at the bottom of the second ash hopper, and a pneumatic valve is provided on the ash discharge port.

[0021] The pneumatic valve facilitates the control of the connection or closure of the ash discharge port. When powdered raw materials are put into the vacuum hopper, closing the pneumatic valve facilitates the generation of a vacuum in the filtering mechanism so as to adsorb the raw materials in the hopper into the filtering mechanism. After the powdered raw materials are loaded, opening the pneumatic valve discharges the packaged raw materials into the mixing tank; when the mixing tank is stirring, closing the pneumatic valve can prevent dust from spilling out, and when discharging, opening the pneumatic valve facilitates the discharge of the raw materials.

[0022] Preferably, the bottom of the hopper is connected to the bottom of the tubular screw conveyor, and the top of the tubular screw conveyor is connected to the feed port at the top of the filtering mechanism.

[0023] By directly connecting the bottom of the hopper to the bottom of the tubular screw conveyor, all the raw materials poured into the hopper can fall downward into the tubular screw conveyor and then be automatically conveyed by the tubular screw conveyor into the filtering mechanism, which is convenient for feeding.

[0024] Preferably, a bracket is provided at the bottom of the hopper, and a pressure sensor is provided between the top of the bracket and the hopper.

[0025] The hopper is supported and fixed by the bracket, and the weight of the raw materials put into the hopper each time can be detected by the pressure sensor.

[0026] Preferably, a discharge pipe is provided at the bottom of the mixing tank.

[0027] The raw materials after stirring and mixing are led out through the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0030] Figure 2 is a sectional view of the present invention;

[0031] Figure 3 is a three-dimensional structural schematic diagram after the filtering mechanism of the present invention;

[0032] Figure 4 is a top view of the filtering mechanism of the present invention;

[0033] Figure 5 is the present invention Figure 4Schematic three-dimensional structure diagram of the sectional view at A-A;

[0034] Figure 6 It is an exploded view of the filter bag and the support skeleton in the present utility model;

[0035] Figure 7 It is the front view of the filter bag in the present utility model;

[0036] Figure 8 It is the present utility model Figure 7 Sectional view at B-B;

[0037] Figure 9 It is the three-dimensional structure view of the sectional state of the filter bag and the support skeleton in the present utility model.

[0038] Reference numerals: 1 - vacuum pump, 11 - suction air pipe, 2 - filtering mechanism, 21 - housing, 211 - suction air inlet, 212 - mounting plate, 213 - filter bag, 2131 - fold, 2132 - reinforcement band, 214 - support skeleton, 2141 - longitudinal support rod, 2142 - axial support rod, 2143 - fixing ring, 22 - feed inlet, 23 - first ash hopper, 24 - second ash hopper, 25 - ash discharge port, 251 - pneumatic valve, 26 - air bag, 261 - injection pipe, 2611 - jet orifice, 3 - mixing tank, 31 - feed pipe, 32 - mixing shaft, 33 - mixing motor, 34 - discharge pipe, 4 - tubular screw conveyor, 5 - feeding hopper, 51 - support, 52 - pressure sensor. Detailed implementation manners

[0039] Next, the technical solutions of the present utility model will be described clearly and completely in conjunction with the attached Figures 1-9 Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0041] Embodiment 1

[0042] The following is further described in conjunction with specific embodiments. Refer to Figures 1-9As shown in the figure, this embodiment is a dust removal device for mixing concrete raw materials, including a mixing tank 3. A feed pipe 31 and a mixing motor 33 are provided at the top of the mixing tank 3. A mixing shaft 32 is arranged inside the mixing tank 3, and the mixing shaft 32 is connected to the mixing motor 33 by a shaft. A filtering mechanism 2 is installed at the top of the mixing tank 3. A dust discharge port 25 is provided at the bottom of the filtering mechanism 2, and the dust discharge port 25 is communicated with the feed pipe 31 at the top of the mixing tank 3. An air suction port 211 is provided at the top of the filtering mechanism 2, and an air suction pipe 11 is arranged on the air suction port 211. The other end of the air suction pipe 11 is connected to a vacuum pump 1. A feed port 22 is provided on the side wall of the filtering mechanism 2, and the feed port 22 is connected to a feeding hopper 5 through a tubular screw conveyor 4. The vacuum pump 1 and the filtering mechanism 2 can remove dust through dust suction and filtration, preventing dust from overflowing and affecting the working environment of the production area. The raw materials first enter the filtering mechanism 2 through the feeding hopper 5 and the tubular screw conveyor 4. The raw materials after adsorbing dust by the filtering mechanism 2 can fall into the mixing tank 3 from the dust discharge port 25. The dust blocked by the filtering mechanism 2 can also fall into the mixing tank 3 through the dust discharge port 25 when the filtering mechanism 2 is cleaned, ensuring that the dust removal process will not affect the proportion of the dry-mixed concrete raw materials. The tubular screw conveyor 4 can not only convey some large-particle and heavy dry aggregates into the mixing tank 3, but also convey powdery materials such as small-particle and light-weight cementitious materials, admixtures, and preservatives in combination with the suction force of the vacuum pump 1, reducing dust leakage during the feeding stage with the most dust, greatly improving the working efficiency during feeding, and improving the working environment of the feeding area.

[0043] Refer to Figure 5 As shown in the figure, in this embodiment, the filtering mechanism 2 includes a housing 21. A mounting plate 212 is arranged in the middle inside the housing 21. A plurality of through holes are evenly distributed on the mounting plate 212, and filter bags 213 are installed in the through holes. Support skeletons 214 are installed in the filter bags 213. The openings at the tops of the filter bags 213 are detachably and fixedly connected to the mounting plate 212 through the support skeletons 214. The mounting plate 212 inside the housing 21 facilitates the installation of the filter bags 213, and the support skeletons 214 facilitate the fixation of the filter bags 213. At the same time, the support skeletons 214 can prevent the surface area of the filter bags 213 from decreasing due to deformation when the vacuum pump 1 sucks air from the outside of the filter bags 213 to the inside of the filter bags 213, thus affecting the filtering effect.

[0044] Refer to Figures 6-9As shown, in this embodiment, a plurality of pleats 2131 are evenly distributed on the side wall of the filter bag 213. An outer reinforcing band 2132 is provided at the outer edge of the pleats 2131 in the middle of the filter bag 213. The outermost sides of the plurality of pleats 2131 are sequentially connected by an annular reinforcing band 2132. The plurality of pleats 2131 on the side wall of the filter bag 213 can increase the filtration area and improve the filtration efficiency. At the same time, during reverse blowing and dust cleaning, the deformation of the pleats 2131 can be used to quickly remove the dust attached to the surface of the filter bag 213; the reinforcing band 2132 can prevent the filter bag 213 from over-expanding during pulse jet dust cleaning.

[0045] Referring to Figure 6 As shown, in this embodiment, the support skeleton 214 includes a plurality of longitudinally arranged support rods 2141 arranged in a ring and fixing rings 2143 arranged at equal intervals in the vertical direction in the middle of the support skeleton 214. The fixing rings 2143 and the longitudinally arranged support rods 2141 are fixedly connected by a plurality of axially arranged support rods 2142. The longitudinally arranged support rods 2141 on the support skeleton 214 can keep the filter bag 213 in shape when adsorbing dust, preventing the filter bag 213 from deforming and reducing the filtration area. The fixing rings 2143 and the axially arranged support rods 2142 facilitate fixing the positions and shapes of the plurality of longitudinally arranged support rods 2141, and at the same time do not affect the deformation of the filter bag 213.

[0046] Referring to Figure 5 As shown, in this embodiment, a funnel-shaped first ash hopper 23 is provided below the mounting plate 212, and a funnel-shaped second ash hopper 24 is provided below the first ash hopper 23. The feed port 22 is provided on the side wall between the first ash hopper 23 and the second ash hopper 24. The first ash hopper 23 is convenient for receiving the dust falling from the surface of the filter bag 213 during pulse jet dust cleaning, so that it can fall back into the mixing tank 3 from the ash discharge port 25 along the first ash hopper 23. The second ash hopper 24 is convenient for temporarily storing the raw materials conveyed by the tubular screw conveyor 4 on the second ash hopper 24, and then discharging the raw materials into the mixing tank 3 from the ash discharge port 25 during mixing. The first ash blowing hopper is used to block the raw materials falling downward from the second ash blowing hopper from being adsorbed upward, reducing the working pressure of the filter bag 213.

[0047] Referring to Figures 3-5 As shown, in this embodiment, an air bag 26 is provided on the outer side wall of the housing 21. A plurality of jet pipes 261 are provided on the air bag 26. The jet pipes 261 pass through the housing 21 and extend into the housing 21. Jet nozzles 2611 are provided at the bottoms of the jet pipes 261 facing the center of the top opening of the filter bag 213. The air bag 26, the jet pipes 261 and the jet nozzles 2611 on the jet pipes 261 are convenient for using pulse jet to reverse blow and clean all the filter bags 213. Through reverse blowing and the expansion of the filter bag 213, the dust attached to the surface of the filter bag 213 is blown off and shaken off, facilitating the restoration of the filtration performance of the filter bag 213.

[0048] Reference Figure 5 As shown, in this embodiment, the ash discharge port 25 is arranged at the bottom of the second ash hopper 24. An air-operated valve 251 is provided on the ash discharge port 25. It is convenient to control the connection or closure of the ash discharge port 25 through the air-operated valve 251. When putting powdery raw materials into the vacuum feeding hopper 5, closing the air-operated valve 251 is convenient to generate a vacuum in the filtering mechanism 2 so as to adsorb the raw materials in the feeding hopper 5 into the filtering mechanism 2. After the powdery raw materials are fed, opening the air-operated valve 251 discharges the packaged raw materials into the stirring tank 3; when the stirring tank 3 is stirring, closing the air-operated valve 251 can prevent dust from overflowing, and when discharging, opening the air-operated valve 251 is convenient for the raw materials to be discharged.

[0049] Reference Figures 1-2 As shown, in this embodiment, the bottom of the feeding hopper 5 is communicated with the bottom of the tubular screw conveyor 4, and the top of the tubular screw conveyor 4 is communicated with the feeding port 22 at the top of the filtering mechanism 2. By directly connecting the bottom of the feeding hopper 5 with the bottom of the tubular screw conveyor 4, all the raw materials poured into the feeding hopper 5 can fall downward into the tubular screw conveyor 4 and then be automatically conveyed by the tubular screw conveyor 4 into the filtering mechanism 2, which is convenient for feeding.

[0050] Reference Figures 1-2 As shown, in this embodiment, a support 51 is provided at the bottom of the feeding hopper 5, and a pressure sensor 52 is provided between the top of the support 51 and the feeding hopper 5. The feeding hopper 5 is supported and fixed by the support 51, and the weight of the raw materials put into the feeding hopper 5 each time can be detected by the pressure sensor 52.

[0051] Reference Figures 1-2 As shown, in this embodiment, a discharge pipe 34 is provided at the bottom of the stirring tank 3, which is convenient for discharging the stirred and mixed raw materials after mixing is completed.

[0052] Embodiment 2

[0053] When using the present utility model, various raw materials are respectively poured into the feeding hopper 5 according to types. After detecting and recording the weights of the respective raw materials through the pressure sensor 52, the tubular screw conveyor 4 and the vacuum pump 1 are turned on, and the air-operated valve 251 is closed to seal the lower end of the filtering mechanism 2, which is convenient for the vacuum pump 1 to generate suction; the raw materials are conveyed upward by the tubular screw conveyor 4 above the second ash hopper 24 in the filtering mechanism 2, and the filtering mechanism 2 prevents dust from escaping. When conveying powdery raw materials with small particles and light mass, the tubular screw conveyor 4 can act as a conduit to suck the powdery raw materials into the filtering mechanism 2, reducing the problem that the dust leakage during the feeding of powdery raw materials such as cementitious materials and admixtures with the most serious dust dispersion affects the working environment;

[0054] Under the action of the vacuum pump 1, the dust enters the filtering mechanism 2. After that, most of the dust falls on the second ash hopper 24 under the action of gravity. Part of the dust is adsorbed on the surface of the filter bag 213 upward from the second ash hopper 24. The air passes through the filter bag 213 and is discharged through the vacuum pump 1. The support skeleton 214 can limit the deformation amount of the filter bag 213, ensuring that there are a large number of wrinkles 2131 on the outer surface of the filter bag 213 during adsorption dust removal, increasing the adsorption area on the surface of the filter bag 213 and the amount of dust that can be adsorbed;

[0055] When conveying raw materials such as large-particle and heavy-aggregate, the raw materials are conveyed to the filtering mechanism 2 through the tubular screw conveyor 4. The aggregate falls onto the second ash hopper 24 under the action of gravity. The light dust in the aggregate is blocked by the first ash hopper 23, reducing the amount of most dust adsorbed on the surface of the filter bag 213 by the vacuum pump 1;

[0056] After the feeding is completed and the dust is adsorbed by the filtering mechanism 2, the pneumatic valve 251 is opened to make the raw materials temporarily stored on the second ash hopper 24 fall into the mixing tank 3 to start mixing. When cleaning the dust attached to the surface of the filter bag 213, the vacuum pump 1 is closed, and then the gas stored in the air bag 26 is used to spray gas through the blowpipe 261 to the opening of the filter bag 213 in the filtering mechanism 2. The gas causes the filter bag 213 to bulge, and the attached dust on the surface of the filter bag 213 is separated and falls into the mixing tank 3 to be mixed and stirred together with the raw materials being stirred by using the reverse blowing of the gas and the deformation of the filter bag 213, ensuring that the ratio of the dry-mixed concrete raw materials will not change greatly. After mixing is completed, the mixed raw materials are discharged from the discharge pipe 34.

[0057] The directional terms mentioned in the present utility model, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] The standard parts used in this application document can all be purchased from the market, and can also be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art, which belongs to the common knowledge in the art. And this application document is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in this application document.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dust removal device for mixing concrete raw materials, comprising a mixing tank (3), a feeding pipe (31) and a mixing motor (33) being provided at the top of the mixing tank (3), a mixing shaft (32) being provided inside the mixing tank (3), the mixing shaft (32) being connected to the shaft of the mixing motor (33), characterized in that: A filter mechanism (2) is installed on the top of the stirring tank (3); an ash discharge port (25) is provided at the bottom of the filter mechanism (2); the ash discharge port (25) is communicated with a feed pipe (31) at the top of the stirring tank (3); an air suction port (211) is provided on the top of the filter mechanism (2); an air suction pipe (11) is provided on the air suction port (211); the other end of the air suction pipe (11) is connected to a vacuum pump (1); a feed port (22) is provided on the side wall of the filter mechanism (2); the feed port (22) is connected to an upper hopper (5) via a tubular screw conveyor (4).

2. The dust removal device for mixing concrete raw materials according to claim 1, characterized in that: The filtering mechanism (2) comprises a housing (21), a mounting plate (212) being provided in the middle of the inner side of the housing (21), a plurality of through holes being evenly distributed on the mounting plate (212), filter bags (213) being installed in the through holes, support frames (214) being installed in the filter bags (213), and an opening at the top of the filter bag (213) being detachably fixedly connected to the mounting plate (212) via the support frame (214).

3. The dust removal device for mixing concrete raw materials according to claim 2, characterized in that: A plurality of folds (2131) are evenly distributed on the side wall of the filter bag (213), a reinforcement belt (2132) is provided at the outer edge of the fold (2131) in the middle of the filter bag (213), and the outermost sides of the plurality of folds (2131) are connected in sequence via an annular reinforcement belt (2132).

4. The dust removal device for mixing concrete raw materials according to claim 3, characterized in that: The support frame (214) comprises a plurality of longitudinal support rods (2141) arranged in an annular manner and a fixing ring (2143) arranged at equal intervals in the vertical direction in the middle of the support frame (214); the fixing ring (2143) and the longitudinal support rods (2141) are fixedly connected via a plurality of axial support rods (2142).

5. The dust removal device for mixing concrete raw materials according to claim 4, characterized in that: A funnel-shaped first ash hopper (23) is provided below the mounting plate (212), a funnel-shaped second ash hopper (24) is provided below the first ash hopper (23), and a feed port (22) is provided on a side wall between the first ash hopper (23) and the second ash hopper (24).

6. The dust removal device for mixing concrete raw materials according to claim 5, characterized in that: An air bag (26) is provided on the outer wall of the shell (21), and a plurality of blowing pipes (261) are provided on the air bag (26). The blowing pipes (261) pass through the shell (21) and extend into the shell (21). Air jet ports (2611) are provided at the bottom of the blowing pipes at the center of the top opening of the filter bag (213).

7. The dust removal device for mixing concrete raw materials according to claim 1, characterized in that: The ash discharge port (25) is arranged at the bottom of the second ash hopper (24), and a pneumatic valve (251) is provided on the ash discharge port (25).

8. The dust removal device for mixing concrete raw materials according to claim 1, characterized in that: The bottom of the upper hopper (5) is in communication with the bottom of the tubular screw conveyor (4), and the top of the tubular screw conveyor (4) is in communication with the feed port (22) at the top of the dust removal mechanism.

9. The dust removal device for mixing concrete raw materials according to claim 8, characterized in that: A bracket (51) is provided at the bottom of the upper hopper (5), and a pressure sensor (52) is provided between the top of the bracket (51) and the upper hopper (5).

10. The dust removal device for mixing concrete raw materials according to claim 1, characterized in that: A discharge pipe (34) is provided at the bottom of the stirring tank (3).

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