CN102923483B - Powder conveying or recycling device capable of preventing blocking - Google Patents
Powder conveying or recycling device capable of preventing blocking Download PDFInfo
- Publication number
- CN102923483B CN102923483B CN201210447300.5A CN201210447300A CN102923483B CN 102923483 B CN102923483 B CN 102923483B CN 201210447300 A CN201210447300 A CN 201210447300A CN 102923483 B CN102923483 B CN 102923483B
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- powder
- tube cell
- opening
- fluidized
- external part
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- 239000000843 powder Substances 0.000 title claims abstract description 98
- 238000004064 recycling Methods 0.000 title abstract 3
- 230000000903 blocking effect Effects 0.000 title abstract 2
- 238000005243 fluidization Methods 0.000 claims abstract description 21
- 230000001172 regenerating effect Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000032258 transport Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The invention discloses a powder conveying or recycling device capable of preventing blocking. The device comprises a powder hopper, a fluidization disk, a powder guide tube and a powder recycling container or a powder conveying tube and is characterized by also comprising a blanking sleeve and a tabular switching valve, one end of the tabular switching valve is pivoted inside the blanking sleeve, the other end of the switching valve is a moving end and can close or open an opening of an extending end of the powder guide tube, a first accommodating cavity is arranged on the tabular switching valve in a concave mode, a fluidization plate is arranged in the first accommodating cavity, a fluidization gas channel which is communicated with the first accommodating cavity is also arranged in the tabular switching valve, when the tabular switching valve closes the opening of the extending end of the powder guide tube, the tabular switching valve abuts against the opening of the extending end of the tabular switching valve, and the fluidization plate corresponds to the opening of the extending end of the powder guide tube, so that the fluidization gas which is output from the fluidization gas channel passes through the fluidization plate and enters the inner portion of the powder guide tube smoothly. According to the device, when the powder is conveyed and recycled, the powder is not easy to stack or block in the tube, and the tube is easy and convenient to clean.
Description
Technical field:
The present invention relates to a kind of powder and carry or regenerative apparatus, especially one can foul-proofly be installed in powder conveying or removal process.
Background technology:
Existing powder is carried or the general shrinking valve structure adopting as shown in Figure 1 and Figure 2 of regenerative apparatus.Shrinking valve 03 is to shrink and realize closing and opening of powder channel by its special elastic hose inner covering 031 distortion.In the time that powder channel need to be closed, there is a controlled pressurized air to enter the enclosed cavity 033 of shrinking valve 03 at the admission port 032 of shrinking valve 03, can be out of shape to the powder channel 034 of shrinking valve 03 at compressed-air actuated pressure-acting lower liner cover 031, under continual pressure-acting, make inner covering 031 be out of shape until close powder channel 034.In the time that powder need to reclaim or enter container 05, the interior pressurized air of shrinking valve 03 is discharged by admission port 032, inner covering 031 resilience is shunk, powder channel 034 is opened, powder in powder bucket enters into the inner chamber 021 of leading tube cell 02 by powder bucket under the rheomorphism of fluidized disk 01, and powder channel 034 by shrinking valve 03 arrives the inner chamber 041 of flange 04 again, finally arrive container 05 and be collected.This structure has following shortcoming: 1, powder channel 034 is in off position time, the powder being gathered in 021,034 region can not get fluidisation, be deposited in for a long time this and easily in pipeline, deposit and block, in the time that shrinking valve 03 is opened, powder just can not enter into container 05 and be recovered.2, be to shrink by the elastic recoil of shrinking valve inner covering 031 itself when the opening of the powder channel 034 of shrinking valve 03, the service life to inner covering 031, elasticity, leak tightness etc. require all higher like this.3, inner covering 031 all can have influence on closing of powder channel 034 and open effect in the quality problems of use procedure, the phenomenon such as aging.4, the cost of shrinking valve is high.
Summary of the invention:
The object of the present invention is to provide one to carry or regenerative apparatus by foul-proof powder, powder is not easy to pile up and stop up in pipeline in the time carrying or reclaim, and pipeline cleaning is simple and convenient.
The present invention is achieved by the following technical solution:
One can be carried or regenerative apparatus by foul-proof powder, comprises
One powder bucket, this powder bucket has a cavity in order to splendid attire powder, and powder bucket bottom offers a fluidisation conductance entrance and an assembly opening;
One fluidized disk, this fluidized disk is located in powder bucket and near powder bucket bottom, between fluidized disk and powder bucket bottom, is provided with a fluidisation air chamber, and described fluidized gas introducing port is communicated with this fluidisation air chamber, offers the through hole corresponding with described assembly opening on fluidized disk;
One leads tube cell, and this one end of leading tube cell makes this end opening be communicated with powder bucket cavity through the assembly opening of powder bucket and the through hole of fluidized disk successively, and the other end stretches out in powder bucket through hole; And
One Powder Recovery container or powder transfer line;
It is characterized in that: also comprise
One blanking cover, the tube structure that this blanking cover is upper end closed, lower ending opening, its closed end offers a connecting bore, described in this connecting bore is sheathed on, leads outside the external part of tube cell, and the open end of blanking cover is connected with described Powder Recovery container or powder transfer line; And
One tabular switch valve, it is inner that one end of this tabular switch valve is hubbed at blanking cover, its other end is movable end the opening that can seal or open the external part of leading tube cell, on tabular switch valve, be concaved with the first cavity volume, in this first cavity volume, be provided with a fluidized plate, tabular switch valve inside also offers the fluidized gas passage being communicated with described the first cavity volume, in the time leading the opening of external part of tube cell described in tabular switch valve sealing, tabular switch valve offsets with the opening of the external part of leading tube cell, and its fluidized plate is corresponding with the opening of external part of leading tube cell, make the fluidized gas that self-fluidized type gas passage transports can enter smoothly and lead tube cell inside after fluidized plate.
One as such scheme is improved, it also comprises a control mechanism, before described blanking cover, between rear wall, offer respectively axis hole, one adapter shaft is located between two axis holes, and stretch out respectively in described axis hole at the two ends of adapter shaft, described tabular switch valve is sheathed on outside adapter shaft and is fixedly connected with adapter shaft, a wherein external part of adapter shaft is provided with the passage that axially extends internally and pass from adapter shaft sidewall from this external part, this passage and described fluidized gas channel connection, another external part of adapter shaft is connected with described control mechanism, control mechanism can act on adapter shaft and make adapter shaft and drive tabular switch valve to overturn to seal or open the opening of the external part of leading tube cell.
Control mechanism described above is a cylinder, and this cylinder is installed on the outer wall of powder bucket bottom or blanking cover, one end activity pivot joint of the piston push rod of cylinder and a crank, and the other end of crank is fixedly connected with another external part of described adapter shaft.
The inside of tabular switch valve described above also offers the second cavity volume being connected with fluidized gas passage and first cavity volume of tabular switch valve inside in the below of the first cavity volume, and the second cavity volume is little compared with the first cavity volume.
External part of leading tube cell described above is in being arranged with seal ring near on the lateral wall of opening part.
One end of leading tube cell described above is provided with the flange extending radially outwardly in the sidewall of its opening part, the other end of leading tube cell is in being concaved with circular groove near on the lateral wall of opening part, leads on the lateral wall of tube cell and is provided with outside thread in the top of described circular groove; In the connecting bore of described blanking cover, be provided with and the negative thread of leading tube cell outside thread and matching; The upper surface of described fluidized disk is concaved with in the periphery of its through hole and the recess of leading tube cell flange and matching; Described seal ring is sheathed on the circular groove of leading tube cell.
The outside face of seal ring described above offers the V-type groove circumferentially extending along it.
Fluidized plate described above is corresponding with the open centre of leading tube cell external part.
Blanking cover described above is for cross section is cylindrical or cylindrical-conical tube structure.
Cross section of leading tube cell described above is cylindrical or conical.
The present invention compared with prior art has the following advantages:
1) tabular switch valve is provided with fluidized plate and is provided with fluidized gas passage, in the time of the opening of the external part of tabular switch valve confined bed tube cell, its fluidized plate is corresponding with the opening of external part of leading tube cell, make the fluidized gas that self-fluidized type gas passage transports can enter smoothly and lead tube cell inside after fluidized plate, thereby can carry out fluidisation to the powder of leading in tube cell, in the time that tabular switch valve is opened the opening of the external part of leading tube cell, the powder of fluidisation can drop to Powder Recovery container or powder transfer line unblockedly.Simple in structure, lead tube cell and be difficult for stopping up.In addition, fluidized gas, except realizing the fluidisation of powder, in the time of cleaning, also can and be led tube cell self and play a self-cleaning function adapter shaft, tabular switch valve, cost-saving time, reach the function of one-object-many-purposes, make cleaning more easily, conveniently, thoroughly.
2) at an external part end axis of adapter shaft to the passage being connected with the fluidized gas passage in tabular switch valve that extends internally, not only simple and compact for structure, and can make full use of space, reduce the volume of device, design concept is ingenious.
3) described in, lead tube cell external part in being arranged with seal ring near on the lateral wall of opening part, when described tabular switch valve is during at confined bed tube cell opening, tabular switch valve and lead between tube cell external part and form hermetically-sealed construction, make tabular switch valve and lead sealing between tube cell more reliable, and seal ring can be changed more easily.
Brief description of the drawings:
Fig. 1 is that existing powder is carried or the shrinking valve of the regenerative apparatus structural representation in off position time.
Fig. 2 is that existing powder is carried or the shrinking valve of the regenerative apparatus structural representation in the time of open mode.
Fig. 3 is the structural representation of the tabular switch valve of the present invention at closed state.
Fig. 4 is the I portion enlarged drawing of Fig. 3.
Fig. 5 is the structural representation of the tabular switch valve of the present invention in open mode.
Fig. 6 is the present invention's tabular switch valve and the assembling schematic diagram of adapter shaft.
Fig. 7 is A-A cut-away view of Fig. 6.
Fig. 8 is B-B cut-away view of Fig. 6.
Fig. 9 is the present invention's the assembling schematic diagram of leading tube cell and blanking cover.
Detailed description of the invention:
As shown in the figure, one can be foul-proof powder carry or regenerative apparatus, comprise powder bucket 1, fluidized disk 11, lead tube cell 2, blanking cover 3, tabular switch valve 4, control mechanism 5 and Powder Recovery container 6 or powder transfer line.
Described powder bucket 1 has a cavity in order to splendid attire powder 10, and powder bucket 1 bottom offers a fluidisation conductance entrance 12 and an assembly opening.
Described fluidized disk 11 is located in powder bucket 1 and near powder bucket bottom, between fluidized disk 11 and powder bucket bottom, is provided with a fluidisation air chamber 13, and described fluidized gas introducing port 12 is communicated with this fluidisation air chamber 13, offers the through hole corresponding with described assembly opening on fluidized disk 11.
Described one end of leading tube cell 2 makes this end opening be communicated with powder bucket cavity through the assembly opening of powder bucket 1 and the through hole of fluidized disk 11 successively, and the other end stretches out in powder bucket through hole.
Described blanking cover 3 is the tube structure of upper end closed, lower ending opening, and its closed end offers a connecting bore 31, described in this connecting bore 31 is sheathed on, leads outside the external part of tube cell 2, and the open end of blanking cover 3 is connected with described Powder Recovery container 6 or powder transfer line.Between the forward and backward sidewall of blanking cover 3, offer respectively axis hole 32, one adapter shaft 7 is located between two axis holes 32, and stretch out respectively in described axis hole 32 at the two ends of adapter shaft 7, a wherein external part of adapter shaft is provided with the passage 71 that axially extends internally and pass from adapter shaft sidewall from this external part, and 73 of another external parts of adapter shaft are connected with described control mechanism 5.
One end of described tabular switch valve 4 is sheathed on outside adapter shaft 7 and is fixedly connected with adapter shaft 7, its other end is movable end, and described control mechanism 5 can act on adapter shaft 7 and make adapter shaft 7 and drive tabular switch valve 4 to overturn to seal or open the opening of the external part of leading tube cell 2.On tabular switch valve 4, be concaved with the first cavity volume 41, in this first cavity volume 41, be provided with a fluidized plate 411, tabular switch valve 4 inside also offer the fluidized gas passage 43 being communicated with described the first cavity volume 41, passage 71 in described adapter shaft 7 is communicated with described fluidized gas passage 43, in the time leading the opening of external part of tube cell 2 described in tabular switch valve 4 sealings, tabular switch valve 4 offsets with the opening of the external part of leading tube cell 2, and its fluidized plate 411 is corresponding with the opening of external part of leading tube cell 2, in the present invention, preferred described fluidized plate 411 is corresponding with the open centre of leading tube cell 2 external parts, make to carry and next fluidized gas process fluidized gas passage 43 from the passage 71 of adapter shaft 7, and after fluidized plate 411, can enter smoothly and lead tube cell 2 inside.
Further, described control mechanism 5 can be any actuating unit, the preferred cylinder 51 of control mechanism 5 in the present embodiment, this cylinder can be installed on the outer wall of powder bucket bottom or blanking cover, in the present embodiment, preferably cylinder 51 is installed on powder bucket 1 bottom, one end activity pivot joint of the piston push rod 52 of cylinder and a crank 8, and the other end of crank 8 is fixedly connected with another external part 73 of described adapter shaft 7.As shown in Figure 8, the cross section of another external part 73 of described adapter shaft 7 is square, and the other end of described crank 8 is fixedly connected with this square external part 73 just.
In the present invention, one end of described tabular switch valve 4 is sheathed on outside adapter shaft 7 and is fixedly connected with adapter shaft 7, it is fixedly connected with mode as shown in Figure 6, can on adapter shaft 7, offer a tapped bore 72, and tapped bore 44 is offered in the position of corresponding tapped bore 72 on tabular switch valve, by being connected of a screw and tapped bore 44 and tapped bore 72, tabular switch valve 4 is fixedly connected with adapter shaft 7.
Further, as shown in Figure 7, second cavity volume 42 being connected with fluidized gas passage 43 and first cavity volume 41 of tabular switch valve inside also can be offered in the below of the first cavity volume 41 in the inside of described tabular switch valve 4, and the second cavity volume 42 is little compared with the first cavity volume 41, can make like this fluidized gas transporting out from fluidized gas passage 43 first after the second cavity volume 42 diffusions, flow to again the fluidized plate 411 in the first cavity volume 41, make whole fluidized plate 411 all have fluidized gas to pass through, strengthen fluidisation area.
The present invention also can be at described external part sheathed seal ring 9 on the close lateral wall of opening part of leading tube cell 2., to strengthen tabular switch valve 4 and to lead the leak tightness between tube cell 2 during at confined bed tube cell 2 opening at tabular switch valve 4.
Particularly, as shown in Figure 9, described one end of leading tube cell 2 is provided with the flange 21 extending radially outwardly in the sidewall of its opening part, the other end of leading tube cell is in being concaved with circular groove 22 near on the lateral wall of opening part, leads on the lateral wall of tube cell and is provided with outside thread 23 in the top of described circular groove 22; In the connecting bore 31 of described blanking cover 3, be provided with and the negative thread 311 of leading tube cell outside thread 23 and matching; The upper surface of described fluidized disk 11 is concaved with in the periphery of its through hole and the recess of leading tube cell flange 21 and matching; Described seal ring 9 is sheathed on the circular groove 22 of leading tube cell.
In addition, the outside face of described seal ring 9 also can offer the V-type groove circumferentially extending along it.Described blanking cover 3 can be the cylindrical or cylindrical-conical tube structure in cross section, and described in lead the cross section of tube cell 2 also can be cylindrical or conical.In the present embodiment, blanking cover 3 is the cylindrical tube structures in cross section, and the cross section of leading tube cell 2 is also cylindrical.
The foregoing is only preferred embodiment of the present invention, be not used for limiting scope of the invention process, all equal variation and modifications of doing according to the scope of the claims of the present invention, all fall into the scope that patent of the present invention contains.
Claims (10)
1. can carry or a regenerative apparatus by foul-proof powder, comprise
One powder bucket, this powder bucket has a cavity in order to splendid attire powder, and powder bucket bottom offers a fluidisation conductance entrance and an assembly opening;
One fluidized disk, this fluidized disk is located in powder bucket and near powder bucket bottom, between fluidized disk and powder bucket bottom, is provided with a fluidisation air chamber, and described fluidized gas introducing port is communicated with this fluidisation air chamber, offers the through hole corresponding with described assembly opening on fluidized disk;
One leads tube cell, and this one end of leading tube cell makes this end opening be communicated with powder bucket cavity through the assembly opening of powder bucket and the through hole of fluidized disk successively, and the other end stretches out in powder bucket through hole; And
One Powder Recovery container or powder transfer line;
It is characterized in that: also comprise
One blanking cover, the tube structure that this blanking cover is upper end closed, lower ending opening, its closed end offers a connecting bore, described in this connecting bore is sheathed on, leads outside the external part of tube cell, and the open end of blanking cover is connected with described Powder Recovery container or powder transfer line; And
One tabular switch valve, it is inner that one end of this tabular switch valve is hubbed at blanking cover, its other end is movable end the opening that can seal or open the external part of leading tube cell, on tabular switch valve, be concaved with the first cavity volume, in this first cavity volume, be provided with a fluidized plate, tabular switch valve inside also offers the fluidized gas passage being communicated with described the first cavity volume, in the time leading the opening of external part of tube cell described in tabular switch valve sealing, tabular switch valve offsets with the opening of the external part of leading tube cell, and its fluidized plate is corresponding with the opening of external part of leading tube cell, make the fluidized gas that self-fluidized type gas passage transports can enter smoothly and lead tube cell inside after fluidized plate.
2. one according to claim 1 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: also comprise a control mechanism, before described blanking cover, between rear wall, offer respectively axis hole, one adapter shaft is located between two axis holes, and stretch out respectively in described axis hole at the two ends of adapter shaft, described tabular switch valve is sheathed on outside adapter shaft and is fixedly connected with adapter shaft, a wherein external part of adapter shaft is provided with the passage that axially extends internally and pass from adapter shaft sidewall from this external part, this passage and described fluidized gas channel connection, another external part of adapter shaft is connected with described control mechanism, control mechanism can act on adapter shaft and make adapter shaft and drive tabular switch valve to overturn to seal or open the opening of the external part of leading tube cell.
3. one according to claim 2 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: described control mechanism is a cylinder, this cylinder is installed on the outer wall of powder bucket bottom or blanking cover, one end activity pivot joint of the piston push rod of cylinder and a crank, the other end of crank is fixedly connected with another external part of described adapter shaft.
4. can carry or regenerative apparatus by foul-proof powder according to the one described in claims 1 to 3 any one, it is characterized in that: the inside of described tabular switch valve also offers the second cavity volume being connected with fluidized gas passage and first cavity volume of tabular switch valve inside in the below of the first cavity volume, and the second cavity volume is little compared with the first cavity volume.
One according to claim 4 can be foul-proof powder carry or regenerative apparatus, it is characterized in that: described in lead tube cell external part in being arranged with seal ring near on the lateral wall of opening part.
6. one according to claim 5 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: described in lead tube cell one end be provided with the flange extending radially outwardly in the sidewall of its opening part, the other end of leading tube cell is in being concaved with circular groove near on the lateral wall of opening part, leads on the lateral wall of tube cell and is provided with outside thread in the top of described circular groove; In the connecting bore of described blanking cover, be provided with and the negative thread of leading tube cell outside thread and matching; The upper surface of described fluidized disk is concaved with in the periphery of its through hole and the recess of leading tube cell flange and matching; Described seal ring is sheathed on the circular groove of leading tube cell.
7. one according to claim 6 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: the outside face of described seal ring offers the V-type groove circumferentially extending along it.
8. one according to claim 7 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: described fluidized plate is corresponding with the open centre of leading tube cell external part.
9. one according to claim 8 can be carried or regenerative apparatus by foul-proof powder, it is characterized in that: described blanking cover is for cross section is cylindrical or cylindrical-conical tube structure.
One according to claim 9 can be foul-proof powder carry or regenerative apparatus, it is characterized in that: described in to lead the cross section of tube cell cylindrical or conical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447300.5A CN102923483B (en) | 2012-11-09 | 2012-11-09 | Powder conveying or recycling device capable of preventing blocking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447300.5A CN102923483B (en) | 2012-11-09 | 2012-11-09 | Powder conveying or recycling device capable of preventing blocking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102923483A CN102923483A (en) | 2013-02-13 |
| CN102923483B true CN102923483B (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210447300.5A Expired - Fee Related CN102923483B (en) | 2012-11-09 | 2012-11-09 | Powder conveying or recycling device capable of preventing blocking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102923483B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103420071A (en) * | 2013-07-31 | 2013-12-04 | 周其锋 | Ore rolling channel |
| CN113844896B (en) * | 2021-01-21 | 2023-05-30 | 内蒙古富川饲料科技股份有限公司 | Anti-blocking discharging device for feed production and processing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2684869A (en) * | 1951-05-21 | 1954-07-27 | Dorr Co | Handling pulverulent materials |
| US4071452A (en) * | 1975-05-28 | 1978-01-31 | Swiss Aluminium Ltd. | Device for discharging particulate materials |
| CN2528747Y (en) * | 2002-02-07 | 2003-01-01 | 青岛四洲电力设备有限公司 | Metal microporous fluidizing device for storehouse pump bottom |
| CN102173346A (en) * | 2011-03-04 | 2011-09-07 | 济南煜龙气力输送设备有限公司 | Environment-friendly boiling side lead type sender |
| CN202116047U (en) * | 2011-06-08 | 2012-01-18 | 宝钢工程技术集团有限公司 | Fluidized bed device |
| CN202967556U (en) * | 2012-11-09 | 2013-06-05 | 裕东（中山）机械工程有限公司 | Powder conveying or recovery device capable of preventing blocking |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090326828A1 (en) * | 2008-06-27 | 2009-12-31 | Amol Prakash | Optimizing Selection of SRM Transitions for Analysis of Biomolecules by Tandem Mass Spectrometry |
-
2012
- 2012-11-09 CN CN201210447300.5A patent/CN102923483B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2684869A (en) * | 1951-05-21 | 1954-07-27 | Dorr Co | Handling pulverulent materials |
| US4071452A (en) * | 1975-05-28 | 1978-01-31 | Swiss Aluminium Ltd. | Device for discharging particulate materials |
| CN2528747Y (en) * | 2002-02-07 | 2003-01-01 | 青岛四洲电力设备有限公司 | Metal microporous fluidizing device for storehouse pump bottom |
| CN102173346A (en) * | 2011-03-04 | 2011-09-07 | 济南煜龙气力输送设备有限公司 | Environment-friendly boiling side lead type sender |
| CN202116047U (en) * | 2011-06-08 | 2012-01-18 | 宝钢工程技术集团有限公司 | Fluidized bed device |
| CN202967556U (en) * | 2012-11-09 | 2013-06-05 | 裕东（中山）机械工程有限公司 | Powder conveying or recovery device capable of preventing blocking |
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|---|---|
| CN102923483A (en) | 2013-02-13 |
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