CN215794975U - Environment-friendly dust removal feeding device applied to powdery material - Google Patents
Environment-friendly dust removal feeding device applied to powdery material Download PDFInfo
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- CN215794975U CN215794975U CN202121746453.0U CN202121746453U CN215794975U CN 215794975 U CN215794975 U CN 215794975U CN 202121746453 U CN202121746453 U CN 202121746453U CN 215794975 U CN215794975 U CN 215794975U
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Abstract
The utility model provides an environment-friendly dust removal feeding device applied to powdery materials, which comprises: the device comprises a feeding bin, a fixed plate, a hinged cover plate, a dust collection mechanism, a plurality of groups of bearing grids, a plurality of rod-shaped shearing cutter groups and a driving motor; the fixed plate is covered on one side of a material port on the upper part of the feeding bin, and the uncovered side of the material port forms a feeding port; one side of the feeding port close to the fixed plate is provided with a hinged shaft, and one side edge of the hinged cover plate is arranged on the hinged shaft; the dust absorption mechanism penetrates through the fixed plate and extends into the feeding bin; the multiple groups of bearing grids are parallel to the hinge shaft, are horizontally arranged in the feeding bin at intervals and form an accommodating space between the feeding bin and the feeding port; the plurality of rod-shaped shearing cutter groups are parallel to the hinge shaft, and each rod-shaped shearing cutter group can rotate in the circumferential direction and is respectively arranged between any two adjacent groups of bearing grids, and one end of each rod-shaped shearing cutter group penetrates out of the side wall of the feeding bin and is in driving connection with the driving motor. Therefore, the dust can be effectively prevented from scattering everywhere in the feeding process of the bagged powdery materials.
Description
Technical Field
The utility model relates to the technical field of compound fertilizer production, in particular to an environment-friendly dedusting feeding device applied to powdery materials.
Background
In the production process of the compound fertilizer, bagged powdery materials need to be continuously added into a feeding bin, a large amount of dust can be generated in the process of adding the powdery materials, and the dust can be sucked into a respiratory tract by an operator to seriously affect the body health of the operator when the dust is scattered into the air. Therefore, an induced draft dust collector is usually provided in the feed bin to suck away the scattered dust as much as possible. However, in the process of opening and pouring the bagged powdery materials into the feeding bin, the feeding bin is always in an open state, so that the flying dust still inevitably causes health influence on nearby operators; but also causes dust pollution to the operation site. Therefore, how to provide a feeding device capable of effectively preventing dust from scattering around in the feeding process of bagged powdery materials becomes one of the technical problems to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the technical scheme is how to provide a powdery material feeding device which can effectively prevent dust from flying around in the feeding process of bagged powdery materials so as to ensure the health of operators and avoid environmental pollution.
In order to solve the technical problem, the technical scheme provides an environmental protection dust removal feeding device applied to powdery materials, which comprises: the device comprises a feeding bin, a fixed plate, a hinged cover plate, a dust collection mechanism, a plurality of groups of bearing grids, a plurality of rod-shaped shearing cutter groups and a driving motor; wherein, the upper part of the feeding bin is provided with a material port; the fixed plate is covered and combined on one side of the material port to shield the covered part of the material port, and the part of the material port which is not covered by the fixed plate forms a material feeding port communicated with the outside; one side of the feeding port close to the fixed plate is provided with a hinged shaft, one side edge of a hinged cover plate is arranged on the hinged shaft, and the hinged cover plate is arranged on the feeding port by taking the hinged shaft as a movable shaft and can be opened or closed; the dust absorption mechanism penetrates through the fixed plate and extends into the feeding bin so as to absorb dust generated in the feeding bin during feeding operation; the multiple groups of bearing grids are parallel to the hinge shaft and are horizontally arranged in the feeding bin at intervals, and an accommodating space for placing a powdery material bag is formed between the multiple groups of bearing grids and the feeding port; the plurality of rod-shaped shearing knife groups are parallel to the hinge shaft, each rod-shaped shearing knife group can rotate in the circumferential direction and is respectively arranged between any two adjacent groups of bearing grids, and one end of each rod-shaped shearing knife group penetrates out of the side wall of the feeding bin and is in driving connection with the driving motor. According to the above, can place ton bagged powder material in the accommodation space of bearing grid top, later closed articulated apron is in order to seal the dog-house, open driving motor and open the material bag with the rotatory circumference of actuating lever form scissors group, make powder material fall into and throw the feed bin in, the dust that produces of material in-process will be thrown by dust absorption mechanism simultaneously and is absorbed, thereby effectually avoid powder material throwing the material in-process and throw the material and open the dust when articulated apron after finishing everywhere and fly away, with this can prevent that operating personnel from inhaling the dust in throwing the material operation process, and ensure that the surrounding environment avoids dust pollution.
As another implementation of the technical proposal, the dust suction mechanism consists of a dust suction pipe, a dust suction part and an exhaust fan; the dust collection pipe penetrates through the fixed plate, one end of the dust collection pipe, which is positioned outside the feeding bin, is connected with the dust collection device, which is positioned outside the environment-friendly dust collection feeding device, and one end of the dust collection pipe, which is positioned inside the feeding bin, is connected with the dust collection part; the air exhauster is arranged on the dust absorption pipe positioned outside the feeding bin, and an air suction opening of the air exhauster is communicated with the inside of the dust absorption pipe. Therefore, the operation of the exhaust fan can generate negative pressure in the dust suction pipe, so that the dust suction part can suck and remove dust generated in the feeding bin in the feeding process and send the dust into the dust removal device through the dust suction pipe for recovery processing, thereby not only preventing the dust from floating, but also collecting and recycling the dust, and improving the economic benefit.
In another embodiment of the present invention, the dust suction unit is formed by combining a plurality of horizontal pipes connected to the dust suction pipe in parallel. Therefore, a larger dust suction area can be ensured, and the dust suction efficiency is improved.
As another implementation of the technical scheme, the bearing grating is composed of at least two longitudinal rods and a plurality of transverse rods; wherein, the longitudinal rods are parallel to the articulated shaft, at least two longitudinal rods of the bearing grating are horizontally arranged in the feeding bin at intervals, and two ends of the longitudinal rods are respectively connected and fixed with two side walls of the feeding bin; the plurality of cross rods are parallel to each other and are spaced and are fixedly connected between any two adjacent longitudinal rods, and the cross rods are perpendicular to the longitudinal rods. Therefore, the bearing grating can be ensured to have stronger structural strength so as to bear heavier ton bagged powdery materials.
As another implementation of this technical scheme, this environmental protection is removed dust and is thrown material device still includes: a plurality of side rods; wherein, this side lever is L form, and this several side lever separates each other and just is mutually perpendicular with the vertical pole, the one end of this several side lever with close on the vertical pole fixed connection of fixed plate, the other end of this several side lever and the downside fixed connection of fixed plate. Therefore, the material bag can be prevented from falling into the feeding bin from the gap between the fixing plate and the bearing grid.
As another implementation of the technical scheme, the rod-shaped shearing knife group consists of a rotating rod, a plurality of fixed rings and a plurality of annular shearing blades; the rotating rod is parallel to the hinge shaft, one end of the rotating rod is movably combined on the side wall of the feeding bin through a bearing seat, and the other end of the rotating rod penetrates through the side wall of the feeding bin and is in driving connection with the driving motor; the plurality of fixing rings are sleeved and fixed on the rotating rod at intervals; the annular shearing blades are sleeved and fixed on the fixing rings. In view of the above, through driving motor drive bull stick circumferential direction rotation to drive this several annular shear blade circumferential direction, thereby cut open the material bag that contacts with annular shear blade and make the powdery material fall into to throwing in the feed bin.
As another implementation of this technical scheme, this environmental protection is removed dust and is thrown material device still includes: a hinged cover plate fastening mechanism; the hinge cover plate fastening mechanism consists of a fastening plate, an inserted link and an insertion hole; the fastening plate is hinged to the side edge of the hinged cover plate, which is far away from the hinged shaft; the inserted bar is transversely fixed on the outer side surface of the side wall area of the feeding bin, which is used for being attached to the fastening plate; the jack is arranged at the position of the fastening plate corresponding to the inserted link; the insertion rod is sleeved through the insertion hole, so that the fastening plate is fixedly attached to the outer side face of the side wall of the feeding bin, and the hinged cover plate is fixedly covered on the feeding port stably. Therefore, the situation that the hinged cover plate is accidentally opened or gaps are generated to scatter dust in all places due to vibration generated by the power part can be effectively prevented in the feeding process.
As another implementation of this solution, the upper part of the support grid has several needles standing upwards. Therefore, the material bag can be stably fixed on the bearing grating to prevent the material bag from deviating.
As another implementation of this solution, the area of the fixing plate is smaller than the area of the hinged cover plate. Thus, the effective area of the feeding port can be ensured.
As another implementation of the technical scheme, ㄩ -shaped sealing strips and strip-shaped sealing strips are respectively arranged at the positions of the lower side surface of the hinged cover plate corresponding to the side wall of the feeding bin and the positions between the hinged cover plate and the fixing plate. Therefore, the sealing performance of the environment-friendly dedusting feeding device can be enhanced, and the leakage and the dispersion of dust in the feeding process are prevented.
Drawings
FIG. 1 is a schematic partial perspective view of an environment-friendly dust-removing feeding device for powdery materials according to the present invention;
FIG. 2 is a partial side sectional view of the environmental dust removal charging device applied to powdery materials in accordance with the present invention;
fig. 3 is a partial side view of the dust suction mechanism of the present invention.
Symbolic illustration in the drawings:
1, feeding a bin; 11 a feeding port; 12, a hinged shaft; 13 an accommodating space; 2, fixing a plate; 3, hinging a cover plate; 4, a dust suction mechanism; 41 a dust suction pipe; 42 a dust suction part; 421 horizontal tube; 43 an exhaust fan; 5 supporting the grating; 51 a longitudinal bar; 52 a cross bar; 53 side rods; 54 a needle; 6 rod-shaped scissors set; 61 rotating rod; 62 fixing the ring; 63 an annular shear blade; 7 driving the motor; 8, a cover plate fastening mechanism is hinged; 81 fastening a plate; 82 inserting a rod; and 83 inserting holes.
Detailed Description
The following detailed description and technical contents of the present invention are described with reference to the drawings, which are provided for reference and illustration purposes only and are not intended to limit the present invention.
Fig. 1 and 2 show an embodiment of an environment-friendly dust removing and feeding device (hereinafter referred to as an environment-friendly dust removing and feeding device) applied to powder materials according to the present invention. This material device is thrown in environmental protection dust removal includes: the device comprises a feeding bin 1, a fixing plate 2, a hinged cover plate 3, a dust collection mechanism 4, a plurality of groups of supporting grids 5, a plurality of rod-shaped shearing cutter groups 6 and a driving motor 7. The present invention is described with reference to a rectangular charging bin 1, but the charging bin 1 may have other shapes. Wherein, the upper part of the feeding bin 1 is provided with a material port (not marked in the figure), the fixed plate 2 is covered and combined on one side of the material port so as to shield the covered part of the material port, and the part of the material port which is not covered by the fixed plate 2 forms a feeding port 11 communicated with the outside. One side of the feeding port 11 close to the fixing plate 2 is provided with a hinged shaft 12, one side of the hinged cover plate 3 is arranged on the hinged shaft 12, and the hinged cover plate 3 is arranged on the feeding port 11 by taking the hinged shaft 12 as a movable shaft and a cover which can be opened or closed. As shown in fig. 1, the area of the fixed plate 2 is smaller than that of the hinged cover plate 3, so as to ensure a larger feeding area of the feeding port 11, and ㄩ -shaped sealing strips (not shown) and strip-shaped sealing strips (not shown) can be respectively arranged at the position of the lower side surface of the hinged cover plate 3 corresponding to the side wall of the feeding bin and at the position between the hinged cover plate 3 and the fixed plate 2, so as to enhance the sealing performance of the environment-friendly dust-removing feeding device and prevent dust from leaking and scattering in the feeding process; in addition, the ㄩ -shaped sealing strip can also be arranged at the upper end edge of the side wall of the feeding bin. The dust suction mechanism 4 penetrates through the fixed plate 2 and extends into the feeding bin 1 so as to suck dust generated in the feeding bin 1 during feeding operation. The multiple groups of bearing grids 5 are arranged in the feeding bin 1 in parallel with the hinge shaft 12, horizontally and at intervals, and an accommodating space 13 for placing a powdery material bag is formed between the multiple groups of bearing grids 5 and the feeding port 11. The rod-shaped shearing knife groups 6 are parallel to the hinge shaft 12, each rod-shaped shearing knife group 6 can be circumferentially and rotatably arranged between any two adjacent bearing grids 5, and one end of each rod-shaped shearing knife group 6 penetrates through the side wall of the feeding bin 1 and is in driving connection with the driving motor 7.
More specifically, as shown in fig. 2 and 3, the dust suction mechanism 4 is composed of a dust suction pipe 41, a dust suction unit 42, and a suction fan 43. Wherein, the dust pipe 41 is inserted into the fixing plate 2, and one end of the dust pipe 41 outside the feeding bin 1 is connected with a dust removing device (not shown) outside the environment-friendly dust removing and feeding device, and the dust removing device can be a bag type dust remover, so as to be beneficial to collecting and recycling dust. The dust suction pipe 41 is connected to a dust suction unit 42 at one end in the hopper 1. The exhaust fan 43 is installed on the dust suction pipe 41 located outside the charging bin 1, and an exhaust opening of the exhaust fan 43 is communicated with the inside of the dust suction pipe 41. Accordingly, the operation of the exhaust fan 43 can generate negative pressure in the dust suction pipe 41, so that the dust suction part 42 can suck the dust generated in the feeding bin 1 during the feeding process and send the dust into the dust removing device through the dust suction pipe 41 for recycling, thereby preventing the dust from scattering and collecting the dust for reuse, and improving the economic benefit. The dust suction part 42 can be formed by combining a plurality of horizontal pipes 421 communicated with the dust suction pipe 41 in parallel, thereby ensuring a larger dust suction area and ensuring dust suction efficiency.
In the present embodiment, the support grid 5 is composed of at least two vertical rods 51 and a plurality of horizontal rods 52, as shown in fig. 1 and 2, the present embodiment is described with two support grids 5, each support grid 5 having two vertical rods 51 and five horizontal rods 52, but the present invention is not limited to the number of the support grids 5 and the vertical rods 51 and the horizontal rods 52 constituting the support grids 5. The longitudinal rods 51 are parallel to the hinge shaft 12, the longitudinal rods 51 are horizontally arranged in the feeding bin 1 at intervals, two ends of the longitudinal rods 51 are respectively connected and fixed with two side walls of the feeding bin 1, and the fixing mode can be welding or fixing through a nut screwing and fastening mode. The plurality of cross bars 52 are parallel and spaced from each other and are perpendicular to the longitudinal bars 51 and fixedly connected between any two adjacent longitudinal bars 51. With this structure, the supporting grid 5 can be ensured to have stronger structural strength to support heavier ton of bagged powdery material. In addition, in order to prevent to throw the material in-process, the material bag falls into by fixed plate 2 and the clearance department between the bearing grid 5 and throws the feed bin in, this environmental protection is removed dust and is thrown material device and still can include: a number of side bars 53, five side bars 53 being shown in fig. 1, but the utility model is not limited in this regard to the number of side bars 53. The side rods 53 are L-shaped, the side rods 53 are spaced from each other and perpendicular to the longitudinal rod 51, one end of each side rod 53 is fixedly connected to the longitudinal rod 51 adjacent to the fixing plate 2, and the other end of each side rod 53 is fixedly connected to the lower side of the fixing plate 2. In the present invention, the vertical bar 51, the horizontal bar 52, and the side bars 53 may be connected by welding.
In the present embodiment, as shown in fig. 1, the rod-shaped cutter set 6 may be composed of a rotating rod 61, a plurality of fixed rings 62 and a plurality of annular cutting blades 63, and the present embodiment is described with a group of rod-shaped cutter set 6, seven fixed rings 62 and annular cutting blades 63, but the number of the components is not limited in the present invention. The rotating rod 61 is parallel to the hinge shaft 12, one end of the rotating rod 61 is movably combined with the side wall of the feeding bin 1 through a bearing seat (not shown), and the other end of the rotating rod 61 penetrates through the side wall of the feeding bin 1 (a through hole can be formed in the side wall and a bearing is arranged in the through hole, and the rotating rod penetrates through the side wall through the bearing) and is in driving connection with the driving motor 7. The plurality of fixing rings 62 are fixed on the rotating rod 61 in a spaced manner. The annular shearing blades 63 are fixed on the fixing rings 62. Accordingly, the driving motor 7 drives the rotating rod 61 to rotate circumferentially to drive the annular shearing blades 63 to rotate circumferentially, so that the material bag in contact with the annular shearing blades 63 is cut open, and the powdery material falls into the feeding bin 1.
In this embodiment, as shown in fig. 2, the environmental protection dust removal feeding device may further include: hinged cover fastening mechanism 8. The hinged cover fastening mechanism 8 may be comprised of a fastening plate 81, an insert rod 82, and an insert hole 83. Wherein the fastening plate 81 is hinged to the side of the hinged cover plate 3 remote from the hinge axis 12. The plunger 82 is fastened transversely to the outer side of the charging magazine 1 for abutting against the side wall region of the fastening plate 81. The insertion hole 83 opens at a position of the fastening plate 81 corresponding to the insertion rod 82. The insertion rod 82 is sleeved through the insertion hole 83, so that the fastening plate 81 is fixedly attached to the outer side surface of the side wall of the feeding bin 1, and the hinged cover plate 3 is fixedly covered on the feeding port 11. Therefore, the situation that the hinged cover plate 3 is accidentally opened or gaps are generated to scatter dust around due to vibration generated by the power part can be effectively prevented in the feeding process.
In the present embodiment, as shown in fig. 1 and 2, the upper portion of the support grid 5 has a plurality of upward-facing vertical needles 54, and the needles 54 are shown to be disposed on the cross bars 52, but the needles 54 can also be disposed on the longitudinal bars 51, which is not limited in this respect. The spike 54 is positioned to stably secure the bag to the support grid 5 and prevent the bag from becoming misaligned.
In summary, the environment-friendly dust removal feeding device of the utility model can place the powdery material bag in the containing space above the bearing grid, then close the hinged cover plate to seal the feeding port, open the driving motor and the exhaust fan to drive the rod-shaped shearing cutter set to rotate circumferentially to cut the material bag, so that the powdery material falls into the feeding bin, and simultaneously suck and remove the dust generated in the feeding process by the dust suction mechanism, thereby effectively avoiding the dust from scattering around when the hinged cover plate is opened in the feeding process and after the feeding is finished, preventing operators from sucking the dust in the feeding operation process, and ensuring the surrounding environment from being polluted by the dust.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and other equivalent changes made by applying the patent concepts of the present invention should fall within the scope of the present invention.
Claims (10)
1. The utility model provides a be applied to environmental protection dust removal of powdery material and throw material device, includes: a feeding bin; the upper part of the feeding bin is provided with a material port; the method is characterized in that: further comprising: the device comprises a fixed plate, a hinged cover plate, a dust collection mechanism, a plurality of groups of bearing grids, a plurality of rod-shaped scissor groups and a driving motor; the fixed plate is covered and combined on one side of the material port to shield the covered part of the material port, and the part of the material port which is not covered by the fixed plate forms a material feeding port communicated with the outside; a hinged shaft is arranged on one side, close to the fixed plate, of the feeding port, one side edge of the hinged cover plate is arranged on the hinged shaft, and the hinged cover plate is arranged on the feeding port by taking the hinged shaft as a movable shaft and can be opened or closed; the dust collection mechanism penetrates through the fixing plate and extends into the feeding bin so as to absorb dust generated in the feeding bin during feeding operation; the plurality of groups of bearing grids are parallel to the articulated shaft and are horizontally arranged in the feeding bin at intervals, and an accommodating space for placing a powdery material bag is formed between the plurality of groups of bearing grids and the feeding port; the plurality of rod-shaped shearing knife sets are parallel to the hinge shaft, each rod-shaped shearing knife set can rotate in the circumferential direction and is respectively arranged between any two adjacent bearing grids, and one end of each rod-shaped shearing knife set penetrates through the side wall of the feeding bin and is in driving connection with the driving motor.
2. The environment-friendly dust removal feeding device applied to powdery materials as claimed in claim 1, wherein the dust suction mechanism is composed of a dust suction pipe, a dust suction part and an exhaust fan; the dust collection pipe penetrates through the fixed plate, one end of the dust collection pipe, which is positioned outside the feeding bin, is connected with a dust removal device, which is positioned outside the environment-friendly dust removal feeding device, and one end of the dust collection pipe, which is positioned in the feeding bin, is connected with the dust collection part; the air exhauster is arranged on the dust absorption pipe positioned outside the feeding bin, and an air suction opening of the air exhauster is communicated with the inside of the dust absorption pipe.
3. The environment-friendly dedusting feeding device applied to powdery materials as in claim 2, wherein the dust suction part is formed by combining a plurality of horizontal pipes communicated with the dust suction pipe side by side.
4. The environment-friendly dedusting feeding device applied to powdery materials as in claim 1, wherein the bearing grid is composed of at least two longitudinal rods and a plurality of transverse rods; the longitudinal rods are parallel to the hinged shaft, at least two longitudinal rods of the bearing grating are horizontally arranged in the feeding bin at intervals, and two ends of each longitudinal rod are respectively connected and fixed with two side walls of the feeding bin; the plurality of cross rods are parallel to each other and are spaced and are perpendicular to the longitudinal rods and fixedly connected between any two adjacent longitudinal rods.
5. The environmental protection dust removal feeding device applied to powdery materials as claimed in claim 4, further comprising: a plurality of side rods; the side lever is L form, the several side lever separate each other and with the vertical pole is mutually perpendicular, the one end of several side lever with close on the vertical pole fixed connection of fixed plate, the other end of several side lever with the downside fixed connection of fixed plate.
6. The environment-friendly dust removal feeding device applied to powdery materials as claimed in claim 1, wherein the rod-shaped shearing cutter set is composed of a rotating rod, a plurality of fixed rings and a plurality of annular shearing blades; the rotating rod is parallel to the hinged shaft, one end of the rotating rod is movably combined on the side wall of the feeding bin through a bearing seat, and the other end of the rotating rod penetrates through the side wall of the feeding bin and is in driving connection with the driving motor; the plurality of fixing rings are sleeved and fixed on the rotating rod at intervals; the annular shearing blades are sleeved and fixed on the annular fixing rings.
7. The environmental protection dust removal feeding device applied to powdery materials as claimed in claim 1, further comprising: a hinged cover plate fastening mechanism; the hinge cover plate fastening mechanism consists of a fastening plate, an inserted link and an insertion hole; the fastening plate is hinged to the side edge of the hinged cover plate, which is far away from the hinged shaft; the inserted bar is transversely fixed on the outer side surface of the feeding bin, which is used for being attached to the side wall area of the fastening plate; the insertion hole is formed in the position, corresponding to the insertion rod, of the fastening plate; the insertion rod is sleeved through the insertion hole, so that the fastening plate is fixedly attached to the outer side surface of the side wall of the feeding bin, and the hinged cover plate is fixedly covered with the feeding port.
8. The environmental protection dust removal feeding device applied to powdery materials as claimed in claim 1, wherein the upper part of the supporting grid is provided with a plurality of upward vertical pricker needles.
9. The environment-friendly dust-removing feeding device applied to powdery materials as claimed in claim 1, wherein the area of the fixing plate is smaller than that of the hinged cover plate.
10. The environment-friendly dust-removing feeding device applied to powdery materials as claimed in claim 1, wherein ㄩ -shaped sealing strips and long-strip-shaped sealing strips are respectively arranged on the lower side surface of the hinged cover plate corresponding to the side wall of the feeding bin and between the hinged cover plate and the fixed plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121746453.0U CN215794975U (en) | 2021-07-29 | 2021-07-29 | Environment-friendly dust removal feeding device applied to powdery material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121746453.0U CN215794975U (en) | 2021-07-29 | 2021-07-29 | Environment-friendly dust removal feeding device applied to powdery material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215794975U true CN215794975U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121746453.0U Active CN215794975U (en) | 2021-07-29 | 2021-07-29 | Environment-friendly dust removal feeding device applied to powdery material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215794975U (en) |
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2021
- 2021-07-29 CN CN202121746453.0U patent/CN215794975U/en active Active
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