CN203319268U - Pneumatic taking-out device for powder warehouse - Google Patents
Pneumatic taking-out device for powder warehouse Download PDFInfo
- Publication number
- CN203319268U CN203319268U CN2013203361464U CN201320336146U CN203319268U CN 203319268 U CN203319268 U CN 203319268U CN 2013203361464 U CN2013203361464 U CN 2013203361464U CN 201320336146 U CN201320336146 U CN 201320336146U CN 203319268 U CN203319268 U CN 203319268U
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- pneumatic
- material pipeline
- out device
- take out
- filler bin
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Abstract
The utility model relates to a pneumatic taking-out device for a powder warehouse. The pneumatic taking-out device comprises a material conveying pipe and is characterized in that a blanking port is formed in the material conveying pipe, and pneumatic fluidizing bars are also arranged in the material conveying pipe. The pneumatic fluidizing bars are positioned at the bottom of a pipe cavity of the material conveying pipe, and the discharge end of the material conveying pipe is provided with a material flow control device. The other end of the material conveying pipe is an air supply end, and the air supply end of the material conveying pipe is connected with an air supply pipeline. The corresponding pneumatic fluidizing bars are also connected with the air supply pipeline at the air supply end of the material conveying pipe. The pneumatic taking-out device has the advantages of simple structure, low energy consumption, less occupied space, good economy and safety and the like, is ideal powder conveying mechanical equipment, and can be widely applied to conveying powder materials such as coal ash, cement and the like out of the warehouse, and maintenance is basically not needed.
Description
Technical field
The utility model relates to the technical field of filler bin discharging with conveying machinery, relates in particular to a kind of pneumatic take out device of filler bin.
Background technology
At present, the filler bin of being made by cement concrete or steel plate, because it has the characteristics such as storage content is large, steadiness is good, has been widely used in the storage of the granular materials such as building materials and chemical.During existing material powder warehouse discharging, the discharging opening that granular material arranges from bottom of the reservior is sent, then is transported to outside storehouse by conveying machinery, realizes materiel warehouse-out.Powder materials conveying machinery commonly used mainly comprises two classes, and a kind of is the conveying that the dependence mechanical movement realizes powder, typical in band conveyor, conveyor screw or FU machine for zipper etc.; Another kind is to carry and realize transporting of powder by strength, typically as air flume commonly used in cement mill etc.Traditional powder materials conveying machinery equipment ubiquity energy consumptions such as band conveyor, conveyor screw or FU machine for zipper are large, the shortcomings such as take up room many, material easily is scattered, and maintaining labor intensive material resources are many, particularly in the discharging process, once there was a mechanical failure, the powder on equipment can't be sent in time, and the powder at discharging opening place is still constantly gushed out, easily cause the accident of burying, on the other hand, once the by-pass valve control of discharging opening breaks down, the accident of conveying machinery also easily appears burying.For air flume, although it relies on aerodynamic force to realize the powder conveying, energy consumption is little, failure rate is low, the material sealing is carried without being scattered, and the maintenance work amount is little, but it needs the larger gradient could realize the smooth delivery of power of powder, the space taken is larger, has therefore greatly limited applying of this type of technology.
In sum, market in the urgent need to provide a kind of take up room little, less energy consumption, the better powder materials conveying machinery of economy and safety.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defect, provide a kind of take up room little, less energy consumption, the pneumatic take out device of the better filler bin of economy and safety.
The pneumatic take out device of the utility model filler bin is to realize like this, comprise Material pipeline, it is characterized in that on Material pipeline arranging at least one blanking port, also be provided with the pneumatic type fluidized bar in Material pipeline, the pneumatic type fluidized bar is positioned at the tube chamber bottom of Material pipeline, the discharge end of Material pipeline arranges material flow control device, the other end of Material pipeline is the air feed end, Material pipeline is connected with supply air line at the air feed end, and corresponding pneumatic type fluidized bar also is connected with supply air line at the air feed end of Material pipeline.
In order to prevent the powder compacting, the decompression storehouse can be set above blanking port, the decompression storehouse is fixedly installed on Material pipeline, and the sidewall in decompression storehouse is provided with the charging gap.In addition, blanking port periphery that can also Material pipeline arranges enclosing.
The kind of the material flow control device that the Material pipeline discharge end arranges is varied, comprises the concrete structures such as butterfly valve, ball valve, column valve and gate valve, as long as can realize opening and closing Material pipeline, can meet operating needs.Except playing the open and close effect, can also utilize the material flow control devices such as butterfly valve, ball valve to control the mass flow of Material pipeline output.
The pneumatic type fluidized bar arranged in Material pipeline comprises the barred body that steel pipe is made, and many breather holes are set on the tube wall of barred body, the outside breathable cloth that coats of barred body.Breathable cloth can tightly wrap up the outer surface of rod setting, it is basic identical that breathable cloth surrounds the outside dimension of the internal diameter size of chamber and barred body in this case, in addition, the internal diameter size of the chamber that breathable cloth surrounds can also be greater than the external diameter of barred body, and breathable cloth is set in the barred body outside loosely.In addition, the pneumatic type fluidized bar arranged in Material pipeline also can adopt following structure: comprise the barred body that steel pipe is made, many breather holes are set on the tube wall of barred body, and the outside breathable cloth that coats of barred body, the outside coating of breathable cloth arranges wire net.
Can also forward deflecting plate be set corresponding blanking port on Material pipeline, forward deflecting plate is downward-sloping gradually along the discharging direction of Material pipeline.
The pneumatic take out device of the utility model filler bin, the powder that the aerodynamic force that utilizes supply air line to provide will enter Material pipeline from blanking port transports to discharge end along Material pipeline, owing to having set up the pneumatic type fluidized bar in Material pipeline, powder transporting in process in Material pipeline, remain good fluidized state, its good fluidity, only need less aerodynamic force just can realize continuous conveying.With traditional powder materials conveying machinery equipment such as band conveyor, conveyor screw or FU machine for zipper, compare, the pneumatic take out device power consumption of the utility model filler bin is few, material transports in Material pipeline, not there will be the situation of being scattered, in addition, its blanking port place does not need to arrange flow control valve, simple in structure, relate to element few, fault rate is extremely low, substantially without maintenance, safe and reliable; With air flume, compare, the pneumatic take out device of the utility model filler bin utilizes supply air line to provide aerodynamic force for the powder through fluidisation in Material pipeline, powder transporting in Material pipeline is more prone to, only need the very little gradient just can successfully realize transporting of powder, even can realize the horizontal feed of powder, so the space that the pneumatic take out device of the utility model filler bin takies is less than above-mentioned any existing powder materials conveying machinery equipment.It is pointed out that owing on the Material pipeline of the pneumatic take out device of the utility model filler bin, a plurality of blanking ports can being set, when a plurality of blanking ports, simultaneously during pan feeding, can also realize the effect of homogenizing material.
In summary it can be seen, the pneumatic take out device of the utility model filler bin has that simple in structure, basic Maintenance free, energy consumption are low, the advantage such as occupy little space, economy and safety are all good, be a kind of desirable powder materials conveying machinery equipment, the outbound that can be widely used in the granular materials such as fly ash, cement is carried.
The accompanying drawing explanation
The structural representation that Fig. 1 is the pneumatic take out device of the utility model filler bin in embodiment mono-.
The application schematic diagram that Fig. 2 is the pneumatic take out device of the utility model filler bin shown in Fig. 1.
The structural representation that Fig. 3 is pneumatic type fluidized bar in the pneumatic take out device of the utility model filler bin shown in Fig. 1.
The structural representation that Fig. 4 is the pneumatic take out device of the utility model filler bin in embodiment bis-.
The structural representation that Fig. 5 is pneumatic type fluidized bar in the pneumatic take out device of the utility model filler bin shown in Fig. 4.
The application schematic diagram that Fig. 6 is the pneumatic take out device of the utility model filler bin shown in Fig. 4.
The structural representation that Fig. 7 is the pneumatic take out device of the utility model filler bin in embodiment tri-.
The structural representation that Fig. 8 is pneumatic type fluidized bar in the pneumatic take out device of the utility model filler bin shown in Fig. 7.
Accompanying drawing sign: 1, Ku Ding; 2, Ku Bi; 3, bottom of the reservior; 4, basis, storehouse; 5, discharging opening; 6, material flow-aiding device; 7, decompression storehouse; 8, supply air line; 9, discharging gallery; 10, the pneumatic take out device of filler bin; 11, material flow control device; 12, feeding gas blow pipe; 13, fluidisation gas blow pipe; 14, Material pipeline; 15, blanking port; 16, pneumatic type fluidized bar; 17, enclosing; 18, decompression warehouse; 19, charging gap; 20, soil; 21, steel pipe; 22, breather hole; 23, breathable cloth; 24, wire net; 25, deflecting plate forward.
The specific embodiment
Embodiment mono-
The pneumatic take out device of the utility model filler bin as shown in figures 1 and 3, comprise Material pipeline 14, a plurality of blanking ports 15 are set on Material pipeline 14, also be provided with pneumatic type fluidized bar 16 in Material pipeline 14, pneumatic type fluidized bar 16 is positioned at the tube chamber bottom of Material pipeline 14, the discharge end of Material pipeline 14 arranges material flow control device 11, at this, material flow control device 11 is specially a butterfly valve, the other end of Material pipeline 14 is the air feed end, Material pipeline 14 and pneumatic type fluidized bar 16 are connected with supply air line at the air feed end respectively, described supply air line specifically comprises the feeding gas blow pipe 12 communicated with Material pipeline, and the fluidisation gas blow pipe 13 communicated with pneumatic type fluidized bar 16, feeding gas blow pipe 12 is connected with external air source (not specifically illustrating in figure) respectively with fluidisation gas blow pipe 13.Pneumatic type fluidized bar 16 comprises the barred body that steel pipe 21 is made, and breather hole 22 is set on the tube wall of barred body, the outside breathable cloth 23 that coats of barred body, and breathable cloth 23 outsides also coat wire net 24 are set.
During application, as shown in Figure 2, filler bin comprises top, storehouse 1, storehouse wall 2, bottom of the reservior 3 and basis, storehouse 4, material flow-aiding device 6 is set on bottom of the reservior 3, at this material flow-aiding device 6, it is the pneumatic type fluidized bar, wall 2 outsides in storehouse are provided with supply air line 8 for pneumatic type fluidized bar 6 air feed, between bottom of the reservior 3 and basis, storehouse 4, discharging gallery 9 is set, the pneumatic take out device 10 of the utility model filler bin is arranged in discharging gallery 9, wherein, the Material pipeline 14 of the pneumatic take out device 10 of filler bin is by a downward-sloping angle outside Nei Xiang storehouse, storehouse, the blanking port 15 arranged on Material pipeline 14 docks with the discharging opening 5 arranged on bottom of the reservior 3, for preventing the powder compacting, on bottom of the reservior 3, the top of corresponding discharging opening 5 also is provided with decompression storehouse 7.The feeding working process is as follows: open the material flow control device 11 that Material pipeline 14 discharge ends arrange, feeding gas blow pipe 12 and fluidisation gas blow pipe 13 start air feed, open material flow-aiding device 6 corresponding to the corresponding discharging opening in bottom of the reservior, powder after fluidisation enters decompression storehouse 7, the blanking port 15 arranged on the discharging opening 5 arranged by bottom of the reservior again and Material pipeline 14 enters Material pipeline 14 inside, under the power-assisted of blowing at feeding gas blow pipe 12, the powder entered in Material pipeline 14 constantly moves to discharge end, powder is in mobile process, remain good fluidized state under the effect of the pneumatic type fluidized bar 16 arranged in Material pipeline 14, therefore can by Material pipeline, be transported to outside storehouse swimmingly.After feeding finishes, material flow-aiding device 6 quits work, then stops the work of feeding gas blow pipe 12 and fluidisation gas blow pipe 13, and the material flow control device 11 of finally closing Material pipeline 14 discharge ends settings gets final product.Due to after material flow-aiding device 6 quits work, powder at the bottom of storehouse loses fluidized state very soon, again be compacted, reach the static balance state, under the covering in decompression storehouse 7, powder no longer enters in Material pipeline 14 through discharging opening 5 and blanking port 15, now stops the work of feeding gas blow pipe 12 and fluidisation gas blow pipe 13, can not cause Material pipeline 14 to be stopped up by powder yet, during next feeding, again operate and get final product according to above-mentioned flow process again.
The discharge end of Material pipeline 14 arranges material flow control device 11 can be varied, except already mentioned butterfly valve, can also be the valve of other versions such as ball valve, column valve and gate valve, as long as can realize opening and closing Material pipeline, can meet operating needs.Except playing the open and close effect, can also utilize the material flow control devices such as butterfly valve, ball valve to control the powder flow of Material pipeline output.
In the pneumatic take out device of the utility model filler bin, the Pneumatic fluidized rod is set in Material pipeline, therefore enter the interior powder of Material pipeline all the time in good fluidized state, the recycling supply air line provides power for the powder through fluidisation in Material pipeline, powder transporting in Material pipeline is more prone to, only need the very little gradient just can successfully realize transporting of powder, therefore after the pneumatic take out device of filler bin application the utility model filler bin, the height of discharging gallery can be reduced to below 1/2nd of traditional filler bin discharging gallery height, it occupies little space, can significantly improve effective storing space of filler bin, there are reserves large, invest the advantages such as little.In addition, the pneumatic take out device of the utility model filler bin realizes that with pneumatic powder carries, the material flow control device of Material pipeline discharge end setting is positioned at outside storehouse, the discharging opening place of bottom of the reservior does not arrange material flow control device, its energy consumption is little, simple in structure, maintenance amount and operation easier all reduce greatly, and economy and safety are all significantly better than existing powder materials conveying machinery equipment.Material for finally can't directly taking out from the pneumatic take out device of the utility model filler bin, can also be connected to lobe pump on the discharge end of Material pipeline, utilizes lobe pump by the residual materials sucking-off.When the unexpected generation of Material pipeline is stopped up, can utilize the method for casting water, obstruction place is opened up, convenient to operation.Be noted that especially the pneumatic take out device of the utility model filler bin can also realize the horizontal feed of powder, only the Material pipeline horizontal arrangement need be got final product during application.It is pointed out that in addition the Material pipeline due to the pneumatic take out device of the utility model filler bin is provided with a plurality of blanking ports, when a plurality of blanking ports, simultaneously during pan feeding, can also realize the effect of homogenizing material.Certainly; according to combined factors such as mass transport length of tube, consider; blanking port on Material pipeline is minimum can only arrange one; also can realize the effect of good convey materials; at this, only with word, be described, no longer other accompanying drawing, this point is equally applicable to other technologies scheme of the present utility model; at this, be described in the lump, among the protection domain all required at the utility model.
To sum up, compared with prior art, the pneumatic take out device of the utility model filler bin has that simple in structure, basic Maintenance free, energy consumption are low, the advantage such as occupy little space, economy and safety are all good, be a kind of desirable powder materials conveying machinery equipment, the outbound that can be widely used in the granular materials such as fly ash, cement is carried.
Embodiment bis-
The pneumatic take out device of the utility model filler bin as shown in Figure 4 and Figure 5, with the difference of embodiment mono-, be, also comprise the decompression storehouse, the decompression storehouse is fixedly installed on Material pipeline 14, the decompression storehouse comprises decompression warehouse 18, the sidewall of decompression warehouse 18 is provided with charging gap 19, and the decompression storehouse is located at the blanking port top.In addition, blanking port 15 peripheries of Material pipeline 14 also are provided with enclosing 17.In addition, pneumatic type fluidized bar 16 comprises the barred body that steel pipe 21 is made, and breather hole 22 is set on the tube wall of barred body, the outside breathable cloth 23 that coats of barred body.
During application, as shown in Figure 6, filler bin comprises top, storehouse 1, storehouse wall 2, bottom of the reservior 3 and basis, storehouse 4, the ring-like basic blocks that make for ferro-concrete on basis 4, storehouse, and one is arranged to basis, storehouse 4 in bottom of the reservior 3.Material flow-aiding device 6 is set on bottom of the reservior 3, is the pneumatic type fluidized bar at this material flow-aiding device 6, and wall 2 outsides in storehouse are provided with supply air line 8 for pneumatic type fluidized bar 6 air feed.In addition, spaced groove on bottom of the reservior 3, the pneumatic take out device of the utility model filler bin is arranged in groove.During feeding, the powder of process material flow-aiding device 6 fluidisations enters in decompression warehouse 18, then enters Material pipeline 14 inside through blanking port 15.All the other processes are identical with the narration in embodiment mono-, at this, no longer repeat.It is to be noted, because the pneumatic take out device of this routine described the utility model filler bin can be realized level and transports powder, therefore directly it is horizontally set in the groove of bottom of the reservior, utilize the groove arranged on bottom of the reservior 3 to substitute the discharging gallery, similar to embodiment mono-, the Material pipeline of the pneumatic take out device of the utility model filler bin directly extends to outside storehouse along groove, the material flow control device of the discharge end setting of corresponding Material pipeline also is set directly at outside storehouse, only with word, be described accompanying drawing explanation no longer in addition at this.Be noted that in addition, because blanking port 15 peripheries of Material pipeline 14 also are provided with enclosing 17, therefore after the material flow-aiding device 6 in filler bin quits work, the quantity that powder enters Material pipeline 14 again can greatly reduce, after can effectively preventing that feeding gas blow pipe 12 and fluidisation gas blow pipe 13 from also quitting work, powder continues to pour into Material pipeline and causes the mass transport blockage.
With embodiment mono-, compare, the pneumatic take out device of this routine described the utility model filler bin has been realized straight feeding, take up room less, therefore use the filler bin of the pneumatic take out device of the utility model filler bin really to realize landing, its bottom of the reservior 3 is set directly at 20 surfaces, soil, has saved the space that the discharging gallery is set, and builds Kucheng originally lower, space availability ratio is higher, and the storing amount is larger.In addition, the decompression storehouse is arranged on the Material pipeline of the pneumatic take out device of the utility model filler bin, and the decompression storehouse coordinates with the contraposition of blanking port more easily to be controlled, and base structure is simpler.
Embodiment tri-
The pneumatic take out device of the utility model filler bin as shown in Figure 7 and Figure 8, with the difference of embodiment bis-, be, in order to adapt to the long needs apart from straight feeding, the quantity of the blanking port 15 arranged on can accretion material conveying tube 14, in addition, can also forward deflecting plate 25 be set corresponding blanking port 15 on Material pipeline 14, forward deflecting plate 25 is downward-sloping gradually along the discharging direction of Material pipeline 14.The internal diameter size of the chamber that in addition, in pneumatic type fluidized bar 16, breathable cloth 23 surrounds is greater than the outside dimension of steel pipe 21.
With embodiment bis-, compare, in the pneumatic take out device of this routine described filler bin, blanking port 15 places of Material pipeline 14 have set up forward deflecting plate 25, in the time of can weakening 16 work of Pneumatic fluidized rod on the impact of blanking, the conveying of powder in Material pipeline 14 is also more smooth and easy, on the other hand, owing to being provided with forward deflecting plate 25, the local lumen size of Material pipeline 14 is dwindled, the gas be blown into through feeding gas blow pipe 12 flows to flow velocity herein can be accelerated suddenly, the difference of pressure of its generation forms to the suction in the Material pipeline chamber, contribute to the powder of blanking port 15 tops to fall into smoothly Material pipeline 14.In addition, the internal diameter size of the chamber that in pneumatic type fluidized bar 16, breathable cloth 23 surrounds is greater than the outside dimension of steel pipe 21, after fluidisation gas blow pipe 13 starts air feed, gas passes through breather hole 22 by tubular breathable cloth 23 bulging of barred body outer setting, the internal diameter size of the chamber surrounded due to breathable cloth 23 is greater than the outside dimension of steel pipe 21, under the blowing of gas, tubular breathable cloth 23 also is the wavy continuous formation of the discharge end to Material pipeline 14 and springs up, this springing up simultaneously also forms transmitting power to the fluidisation state powder in Material pipeline 14, therefore the powder traffic capacity of the pneumatic take out device of this routine described the utility model filler bin is stronger, its horizontal powder that can be suitable for long distance transports.
In summary, the pneumatic take out device of the utility model filler bin has that simple in structure, basic Maintenance free, energy consumption are low, the advantage such as occupy little space, be conducive to realize matter homogenizing, economy and safety are all good, a kind of desirable powder materials conveying machinery equipment, the outbound that can be widely used in the granular materials such as fly ash, cement is carried, and market application foreground is very wide.In addition, the embodiment in the utility model is only better explanation the technical solution of the utility model, should not be considered as restriction of the present utility model, and wherein the technical characterictic in many embodiment also can cross-reference.Based on the utility model know-why; those skilled in the art can re-start combination or utilize similar technology simply to replace some element wherein the described technical scheme of above-described embodiment; as long as based on know-why of the present utility model, in the protection domain all required at the utility model.
Claims (8)
1. the pneumatic take out device of filler bin, comprise Material pipeline, it is characterized in that on Material pipeline arranging at least one blanking port, also be provided with the pneumatic type fluidized bar in Material pipeline, the pneumatic type fluidized bar is positioned at the tube chamber bottom of Material pipeline, the discharge end of Material pipeline arranges material flow control device, the other end of Material pipeline is the air feed end, Material pipeline is connected with supply air line at the air feed end, and corresponding pneumatic type fluidized bar also is connected with supply air line at the air feed end of Material pipeline.
2. the pneumatic take out device of filler bin according to claim 1, is characterized in that the blanking port top is provided with the decompression storehouse, and the decompression storehouse is fixedly installed on Material pipeline, and the sidewall in decompression storehouse is provided with the charging gap.
3. the pneumatic take out device of filler bin according to claim 1, is characterized in that the blanking port periphery of Material pipeline arranges enclosing.
4. the pneumatic take out device of filler bin according to claim 1, is characterized in that material flow control device comprises butterfly valve, ball valve, column valve and gate valve.
5. the pneumatic take out device of filler bin according to claim 1, is characterized in that the pneumatic type fluidized bar comprises the barred body that steel pipe is made, and on the tube wall of barred body, breather hole is set, the outside breathable cloth that coats of barred body.
6. the pneumatic take out device of filler bin according to claim 5, is characterized in that the internal diameter size of the chamber that breathable cloth surrounds is greater than the outside dimension of barred body.
7. the pneumatic take out device of filler bin according to claim 1, is characterized in that the pneumatic type fluidized bar comprises the barred body that steel pipe is made, and on the tube wall of barred body, breather hole is set, the outside breathable cloth that coats of barred body, and outside coating of breathable cloth arranges wire net.
8. the pneumatic take out device of filler bin according to claim 1, is characterized in that on Material pipeline, corresponding blanking port arranges forward deflecting plate, and forward deflecting plate is downward-sloping gradually along the discharging direction of Material pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203361464U CN203319268U (en) | 2013-06-13 | 2013-06-13 | Pneumatic taking-out device for powder warehouse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203361464U CN203319268U (en) | 2013-06-13 | 2013-06-13 | Pneumatic taking-out device for powder warehouse |
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| CN203319268U true CN203319268U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203361464U Expired - Lifetime CN203319268U (en) | 2013-06-13 | 2013-06-13 | Pneumatic taking-out device for powder warehouse |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645125A (en) * | 2016-03-21 | 2016-06-08 | 赵世青 | Combined linear material taking device for powder warehouse |
| CN109455536A (en) * | 2018-12-27 | 2019-03-12 | 奎屯西部建设有限责任公司 | A kind of flyash storage discharge system |
| CN112875332A (en) * | 2021-01-21 | 2021-06-01 | 中车石家庄车辆有限公司 | Pneumatic device for powdery bulk material |
-
2013
- 2013-06-13 CN CN2013203361464U patent/CN203319268U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105645125A (en) * | 2016-03-21 | 2016-06-08 | 赵世青 | Combined linear material taking device for powder warehouse |
| CN105645125B (en) * | 2016-03-21 | 2017-10-17 | 赵世青 | Combined powder storehouse wire type feeding device |
| CN109455536A (en) * | 2018-12-27 | 2019-03-12 | 奎屯西部建设有限责任公司 | A kind of flyash storage discharge system |
| CN109455536B (en) * | 2018-12-27 | 2022-08-26 | 奎屯西部建设有限责任公司 | Fly ash storage and discharge system |
| CN112875332A (en) * | 2021-01-21 | 2021-06-01 | 中车石家庄车辆有限公司 | Pneumatic device for powdery bulk material |
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