CN216705011U - Screening equipment for screening small-particle propellant - Google Patents
Screening equipment for screening small-particle propellant Download PDFInfo
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- CN216705011U CN216705011U CN202123172583.0U CN202123172583U CN216705011U CN 216705011 U CN216705011 U CN 216705011U CN 202123172583 U CN202123172583 U CN 202123172583U CN 216705011 U CN216705011 U CN 216705011U
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Abstract
The utility model discloses screening equipment for screening small-particle propellants, which solves the technical problem that in the prior art, operators are required to perform feeding and receiving operations on site, and a screen is easy to block due to the fact that long materials and powder are mixed in screened finished materials. The quantitative feeding device comprises a frame, a quantitative feeding hopper, a quantitative feeding belt conveyor, a screen drum assembly and a material receiving mechanism, wherein the quantitative feeding belt conveyor is connected out of the quantitative feeding hopper and arranged on the frame, the screen drum assembly is connected out of the quantitative feeding belt conveyor and arranged on the frame, and the material receiving mechanism is arranged below the screen drum assembly and used for receiving and screening small particle propellants of different specifications. The quantitative charging hopper has the advantages of simple structure, scientific and reasonable design and convenience in use, materials are manually fed into the quantitative charging hopper, an operator can leave the field, the liquid crystal touch screen on the PLC control cabinet is monitored through videos, man-machine isolation is realized, and direct contact between people and the materials is avoided.
Description
Technical Field
The utility model belongs to the technical field of screening equipment, and particularly relates to screening equipment for screening small-particle propellants.
Background
With the development of solid propellants, the tactical indexes of solid propellant products are continuously improved, the energy requirements on the solid propellants are higher and higher, the higher the energy of the propellants, the greater the safety risk of the propellants, and the higher the requirements on the conditions for producing and processing the solid propellants. The screening is an essential process for producing and processing the small-particle propellant, and aims to remove fine slag and large particles remained in the medicine cutting process and screen out the small-particle propellant with the diameter of phi 1mm and the length of 0.8 mm-1.2 mm so as to meet the process requirements of the next process. At present, the screening process is to screen small-particle propellants by using a screening machine, an operator is required to perform feeding and receiving operations on site, screened finished material is mixed with long material and powder, the screen is easy to block, the small-particle propellants have high energy, the long-time accumulation is easy to cause combustion, and the screen can be replaced in time in multiple operation steps.
Therefore, designing a screening device for screening small particle propellants to solve at least some of the above technical problems is a technical problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: a screening device for screening small-particle propellant is provided to solve at least some of the technical problems.
In order to realize the purpose, the technical scheme adopted by the utility model is as follows:
the utility model discloses screening equipment for screening small particle propellants, which comprises a rack, a quantitative charging hopper, a quantitative feeding belt conveyor, a screen drum assembly and a material receiving mechanism, wherein the quantitative feeding belt conveyor is connected out of the quantitative charging hopper and is arranged on the rack, the screen drum assembly is connected out of the quantitative feeding belt conveyor and is arranged on the rack, and the material receiving mechanism is arranged below the screen drum assembly and is used for receiving and screening small particle propellants of different specifications.
In some embodiments of the utility model, the screen drum assembly includes a housing mounted to the frame, a roller screen mounted within the housing, and a gear motor mounted to the frame and coupled to the roller screen for driving rotation of the roller screen.
In some embodiments of the utility model, the drum screen is cylindrical, a transmission shaft is coaxially arranged on the drum screen, and a driving shaft of the speed reducing motor is connected with the transmission shaft.
In some embodiments of the present invention, the drive shaft of the reduction motor is connected to the drive shaft by a coupling, and the coupling is an elastic pin coupling.
In some embodiments of the utility model, the shell comprises a lower tank body and a sealing cover which is covered and connected to the top of the lower tank body by adopting a buckle structure, the sealing cover and the lower tank body are mutually sealed when being covered and connected on the lower tank body, the sealing cover is made of transparent materials, at least two supporting wheels are arranged on the roller screen, and the roller screen is in rolling contact with the inner wall of the lower tank body through the supporting wheels.
In some embodiments of the utility model, the lower tank body is provided with a powder outlet, a finished product outlet and a long granule outlet.
In some embodiments of the present invention, the receiving mechanism includes a powder receiving barrel disposed right below the powder outlet, a finished material receiving barrel disposed right below the finished material outlet, and a long granule receiving barrel disposed right below the long granule outlet.
In some embodiments of the utility model, there are at least two powder outlets, and a powder receiving barrel is disposed under each powder outlet.
In some embodiments of the utility model, the screen drum assembly further comprises a feed hopper which is arranged on the frame and is positioned right below the discharge port of the quantitative feeding belt conveyor, and the discharge port of the feed hopper extends into the shell and is butted with the roller screen.
In some embodiments of the utility model, the device further comprises a PLC control cabinet respectively connected with the quantitative feeding hopper, the quantitative feeding belt conveyor and the speed reduction motor, wherein the quantitative feeding hopper, the quantitative feeding belt conveyor, the shell and the rack are all provided with anti-static grounding wires, and the resistance of the anti-static grounding wires is less than or equal to 4 omega.
Compared with the prior art, the utility model has the following beneficial effects:
the quantitative charging hopper has the advantages of simple structure, scientific and reasonable design and convenience in use, materials are manually fed into the quantitative charging hopper, an operator can leave the field, the liquid crystal touch screen on the PLC control cabinet is monitored through videos, man-machine isolation is realized, and direct contact between people and the materials is avoided.
When the device works, the feeding conveying speed, the spiral conveying speed and the waste conveying speed are set through the PLC control cabinet, and after the device is started to operate, the device operates at the fastest speed and is automatically and stably controlled at a set target value; the automatic medicine screening machine has high operation automation degree, and a system can automatically screen medicine after a user starts an operation button through the PLC control cabinet, so that medicine granules with required sizes can be obtained without excessive operation or monitoring of the user.
The application range of the utility model depends on the mesh size of the filter screen, and the application requirements of the utility model can be met by replacing the screen according to the change of the material size. Therefore, in the design, the upper cover of the box body is made of a stainless steel frame and a transparent acrylic material, so that observation in the working process (the trend of materials in the box body, the blockage of the screen, the cleaning of the box body and the like) is facilitated, and the upper cover adopts a quick-opening buckle structure, so that the screen can be conveniently replaced.
The whole anti-static electricity device has anti-static measures, the grounding resistance is less than or equal to 4 omega, static electricity is guaranteed not to be accumulated, the power source of the anti-static electricity device adopts an anti-explosion motor, the leakage protection design is added, and the safety of the power source is guaranteed. The power shaft adopts an elastic pin coupling, and all bearings adopt a full-sealing structure.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Figure 2 is a schematic view of a screen cylinder assembly of the present invention.
Fig. 3 is a view from direction a of fig. 2.
FIG. 4 is a schematic view of the outlet for powder, the outlet for finished product or the outlet for long pellets of the present invention.
FIG. 5 is a schematic representation of a roll screen of the present invention.
FIG. 6 is a view from direction B of FIG. 5 in accordance with the present invention.
Fig. 7 is a connection block diagram of each electrical device of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-a quantitative feeding hopper, 2-a quantitative feeding belt conveyor, 3-a screen drum component, 4-a frame, 5-a shell, 6-a roller screen, 7-a speed reducing motor, 8-a transmission shaft, 9-a coupler, 10-a lower groove body, 11-a sealing cover, 12-a powder outlet, 13-a finished product outlet, 14-a long granule outlet, 15-a powder receiving barrel, 16-a finished product receiving barrel, 17-a long granule receiving barrel, 18-a feeding hopper, 19-a supporting wheel, 20-a PLC control cabinet, 61-an inner screen, 62-an outer screen and 63-a spiral belt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-7, the screening device for screening small particle propellants provided by the utility model comprises a frame 4, a quantitative hopper 1, a quantitative feeding belt conveyor 2 which is connected out from the quantitative hopper 1 and is installed on the frame 4, a screen cylinder assembly 3 which is connected out from the quantitative feeding belt conveyor 2 and is installed on the frame 4, and a material receiving mechanism which is arranged below the screen cylinder assembly 3 and is used for receiving and screening small particle propellants of different specifications.
The screen drum component 3 comprises a shell 5 arranged on the frame 4, a roller screen 6 arranged in the shell 5, and a speed reducing motor 7 arranged on the frame 4 and connected with the roller screen 6 for driving the roller screen 6 to rotate.
The shell 5 comprises a lower tank body 10 and a sealing cover 11 which is covered and connected to the top of the lower tank body 10 by adopting a buckle structure, the sealing cover 11 and the lower tank body 10 are mutually sealed when the sealing cover 11 is covered and connected to the lower tank body, the sealing cover 11 is made of transparent materials, at least two supporting wheels 19 are arranged on a roller screen 6, and the roller screen 6 is in rolling contact with the inner wall of the lower tank body 10 through the supporting wheels 19. The roller screen 6 is cylindrical, a transmission shaft 8 is coaxially arranged on the roller screen 6, and a driving shaft of a speed reducing motor 7 is connected with the transmission shaft 8. The driving shaft of the speed reducing motor 7 is connected with the transmission shaft 8 through a coupling 9, and the coupling 9 is an elastic pin coupling. The lower tank body 10 is provided with a powder outlet 12, a finished product outlet 13 and a long granule outlet 14.
The receiving mechanism comprises a powder receiving barrel 15 arranged right below a powder outlet 12, a finished product receiving barrel 16 arranged right below a finished product outlet 13, and a long granule receiving barrel 17 arranged right below a long granule outlet 14. At least two powder outlets 12 are provided, and a powder receiving barrel 15 is arranged under each powder outlet 12. The lower semicircle is a working area, and the upper semicircle is a non-working area.
The roller screen 6 comprises an inner screen 61 and an outer screen 62, wherein the inner screen 61 is a coarse screen, the inner screen 61 is a dense arrangement with 1.2mm of pore diameter and the diameter of the roller
The length is 1000mm, and a helical band 63 with 30mm height and 200mm lead is arranged in the helical band. The outer screen 62 is a fine screen, the outer screen 62 has a dense arrangement aperture of 0.8mm, the roller screen 6 is a cone with a small head diameter
Big end diameter
The length is 900mm as shown in fig. 5. Manually pouring the materials into a quantitative charging hopper and conveying the materials to
The inner screen 61 is guided by the spiral belt 63 to do spiral motion towards the outlet, long materials are screened out along with the inner screen 61 to the tail end, powder and finished products enter the screen and then are screened to the outer screen 62, the powder is continuously screened to the outer barrel and then enter the powder receiving barrel, and finished products enter the finished product receiving barrel along with the outer screen and then reach the tail end.
Example 2
As shown in fig. 1-7, the screening device for screening small particle propellants provided by the utility model comprises a frame 4, a quantitative hopper 1, a quantitative feeding belt conveyor 2 which is connected out from the quantitative hopper 1 and is installed on the frame 4, a screen cylinder assembly 3 which is connected out from the quantitative feeding belt conveyor 2 and is installed on the frame 4, and a material receiving mechanism which is arranged below the screen cylinder assembly 3 and is used for receiving and screening small particle propellants of different specifications.
Wherein, a sieve section of thick bamboo subassembly 3 is including installing shell 5 in frame 4, installing the roller screen cloth 6 in shell 5, installing in frame 4 and being connected with roller screen cloth 6 and being used for driving roller screen cloth 6 pivoted gear motor 7 to and install in frame 4 and be located the feeder hopper 18 of ration feeding belt machine 2 discharge gate under, the discharge gate of feeder hopper 18 stretches into in the shell 5 and dock with roller screen cloth 6. A gap is left between the feed hopper 18 and the roller screen 6 to ensure that the roller screen 6 can rotate freely.
The shell 5 comprises a lower tank body 10 and a sealing cover 11 which is covered and connected to the top of the lower tank body 10 by adopting a buckle structure, the sealing cover 11 and the lower tank body 10 are mutually sealed when the sealing cover 11 is covered and connected on the lower tank body, the sealing cover 11 is made of transparent materials, at least two supporting wheels 19 are arranged on a roller screen 6, and the roller screen 6 is in rolling contact with the inner wall of the lower tank body 10 through the supporting wheels 19. The roller screen 6 is cylindrical, a transmission shaft 8 is coaxially arranged on the roller screen 6, and a driving shaft of a speed reducing motor 7 is connected with the transmission shaft 8. The driving shaft of the speed reducing motor 7 is connected with the transmission shaft 8 through a coupling 9, and the coupling 9 is an elastic pin coupling. The lower tank body 10 is provided with a powder outlet 12, a finished product outlet 13 and a long granule outlet 14. The lower semicircle is a working area, and the upper semicircle is a non-working area.
The receiving mechanism comprises a powder receiving barrel 15 arranged right below a powder outlet 12, a finished product receiving barrel 16 arranged right below a finished product outlet 13, and a long granule receiving barrel 17 arranged right below a long granule outlet 14. At least two powder outlets 12 are provided, and a powder receiving barrel 15 is arranged under each powder outlet 12.
The roller screen 6 comprises an inner screen 61 and an outer screen 62, wherein the inner screen 61 is a coarse screen, the inner screen 61 is a dense arrangement with 1.2mm of pore diameter and the diameter of the roller
The length is 1000mm, and a helical band 63 with 30mm height and 200mm lead is arranged in the helical band. The outer screen 62 is a fine screen, the outer screen 62 has a dense arrangement of 0.8mm in diameter, the roller screen 6 is a cone with a small end diameter
Big end diameter
The length is 900mm as shown in fig. 5. Manually pouring the materials into a quantitative charging hopper and conveying the materials to
The inner screen 61 moves spirally towards the outlet under the guidance of the spiral belt 63, long materials are screened out along with the inner screen 61 to the tail end, powder and finished products enter the screen and then are screened to the outer screen 62, the powder is continuously screened to the outer barrel and then enter the powder receiving barrel, and the finished products enter the finished product receiving barrel along with the outer screen and then reach the tail end.
Example 3
As shown in fig. 1-7, the screening device for screening small particle propellants provided by the utility model comprises a frame 4, a quantitative hopper 1, a quantitative feeding belt conveyor 2 which is connected out from the quantitative hopper 1 and is installed on the frame 4, a screen cylinder assembly 3 which is connected out from the quantitative feeding belt conveyor 2 and is installed on the frame 4, and a material receiving mechanism which is arranged below the screen cylinder assembly 3 and is used for receiving and screening small particle propellants of different specifications.
The screen drum component 3 comprises a shell 5 arranged on the frame 4, a roller screen 6 arranged in the shell 5, and a speed reducing motor 7 which is arranged on the frame 4 and connected with the roller screen 6 for driving the roller screen 6 to rotate.
The utility model also comprises a PLC control cabinet 20 which is respectively connected with the quantitative charging hopper 1, the quantitative charging belt conveyor 2 and the speed reducing motor 7, wherein antistatic grounding wires are arranged on the quantitative charging hopper 1, the quantitative charging belt conveyor 2, the shell 5 and the frame 4, and the resistance of the antistatic grounding wires is less than or equal to 4 omega.
The shell 5 comprises a lower tank body 10 and a sealing cover 11 which is covered and connected to the top of the lower tank body 10 by adopting a buckle structure, the sealing cover 11 and the lower tank body 10 are mutually sealed when the sealing cover 11 is covered and connected on the lower tank body, the sealing cover 11 is made of transparent materials, at least two supporting wheels 19 are arranged on a roller screen 6, and the roller screen 6 is in rolling contact with the inner wall of the lower tank body 10 through the supporting wheels 19. The roller screen 6 is cylindrical, a transmission shaft 8 is coaxially arranged on the roller screen 6, and a driving shaft of a speed reducing motor 7 is connected with the transmission shaft 8. The driving shaft of the speed reducing motor 7 is connected with the transmission shaft 8 through a coupling 9, and the coupling 9 is an elastic pin coupling. The lower tank body 10 is provided with a powder outlet 12, a finished product outlet 13 and a long granule outlet 14.
The receiving mechanism comprises a powder receiving barrel 15 arranged right below a powder outlet 12, a finished product receiving barrel 16 arranged right below a finished product outlet 13, and a long granule receiving barrel 17 arranged right below a long granule outlet 14. At least two powder outlets 12 are provided, and a powder receiving barrel 15 is arranged under each powder outlet 12.
The roller screen 6 comprises an inner screen 61 and an outer screen 62, wherein the inner screen 61 is a coarse screen, the inner screen 61 is a dense arrangement with 1.2mm of pore diameter and the diameter of the roller
The length is 1000mm, and a helical band 63 with 30mm height and 200mm lead is arranged in the helical band. The outer screen 62 is a fine screen, the outer screen 62 has a dense arrangement of 0.8mm in diameter, the roller screen 6 is a cone with a small end diameter
Big end diameter
The length is 900mm as shown in fig. 5. Manually pouring the materials into a quantitative charging hopper and conveying the materials to
The inner screen 61 is guided by the spiral belt 63 to do spiral motion towards the outlet, long materials are screened out along with the inner screen 61 to the tail end, powder and finished products enter the screen and then are screened to the outer screen 62, the powder is continuously screened to the outer barrel and then enter the powder receiving barrel, and finished products enter the finished product receiving barrel along with the outer screen and then reach the tail end.
When the quantitative feeding device is used, an operator puts materials into the quantitative feeding hopper, leaves the site, sets the feeding conveying speed, the spiral conveying speed and the waste conveying speed through the PLC control cabinet, starts the feeding conveying speed, the spiral conveying speed and the waste conveying speed, enables the device to reach target parameters at the highest speed, and automatically and stably controls the device at the set target values; the material is output by the ration loading hopper at the uniform velocity, gets into in the sieve section of thick bamboo subassembly of screen (ing) machine. The material advances spirally under the action of the transmission shaft. The materials are respectively put into a collecting barrel below after being screened (an open barrel and cloth bag mode is adopted, and the materials are replaced and used in each batch). The long material is screened out from the tail end, the powder and the finished product material are fed into the interlayer, the fine powder material is screened out from the outer cylinder body, the finished product material is discharged from the tail end of the interlayer, and the long material, the finished product material and the powder material flow into respective aluminum collecting grooves through respective channels.
The shell 5 comprises a lower groove body 10 and a sealing cover 11 which is covered and connected to the top of the lower groove body 10 by adopting a buckle structure, the sealing cover 11 and the lower groove body 10 are sealed when covered and connected, and the sealing cover 11 is made of transparent materials. The cover 11 and the lower tank 10 are connected by a buckle structure, and the buckle connection structure is a conventional connection mode and can realize quick opening and closing of the cover 11 and the lower tank 10, so that the buckle structure between the cover 11 and the lower tank 10 is not repeated. The roller screen 6 used in the present invention is an existing device and can be purchased and used in the market.
The quantitative charging hopper 1, the quantitative charging belt conveyor 2, the speed reducing motor 7, the PLC control cabinet 20 and the anti-static grounding wire used in the utility model are all existing known devices and can be purchased and used in the market, and the structures, circuits and control principles of the quantitative charging hopper 1, the quantitative charging belt conveyor 2, the speed reducing motor 7, the PLC control cabinet 20 and the anti-static grounding wire are all existing known technologies, so the structures, circuits and control principles and the like of the quantitative charging hopper 1, the quantitative charging belt conveyor 2, the speed reducing motor 7, the PLC control cabinet 20 and the anti-static grounding wire are not repeated herein.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and certainly not to limit the patent scope of the present invention; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems to be solved by the present invention, which are not substantially changed or supplemented by the spirit and the concept of the main body of the present invention, are still consistent with the present invention and shall be included in the scope of the present invention; in addition, the technical scheme of the utility model is directly or indirectly applied to other related technical fields, and the technical scheme is included in the patent protection scope of the utility model.
Claims (10)
1. The utility model provides a screening equipment is used in screening of tiny particle propellant which characterized in that: the quantitative feeding device comprises a frame (4), a quantitative feeding hopper (1), a quantitative feeding belt conveyor (2) which is connected out from the quantitative feeding hopper (1) and is arranged on the frame (4), a screen drum component (3) which is connected out from the quantitative feeding belt conveyor (2) and is arranged on the frame (4), and a material receiving mechanism which is arranged below the screen drum component (3) and is used for receiving and screening small particle propellants of different specifications.
2. The screening apparatus for screening small particle propellant as claimed in claim 1, wherein: the screen drum component (3) comprises a shell (5) arranged on the rack (4), a roller screen (6) arranged in the shell (5), and a speed reducing motor (7) which is arranged on the rack (4) and connected with the roller screen (6) and used for driving the roller screen (6) to rotate.
3. The screening apparatus for screening small particle propellant as claimed in claim 2, wherein: the roller screen (6) is cylindrical, a transmission shaft (8) is coaxially arranged on the roller screen (6), and a driving shaft of a speed reducing motor (7) is connected with the transmission shaft (8).
4. The screening apparatus for screening small particle propellant as claimed in claim 3, wherein: the driving shaft of the speed reducing motor (7) is connected with the transmission shaft (8) through a coupling (9), and the coupling (9) is an elastic pin coupling.
5. The screening apparatus for screening small particle propellant as claimed in claim 2, wherein: the shell (5) comprises a lower tank body (10) and a sealing cover (11) which is covered and connected with the top of the lower tank body (10) by adopting a buckle structure, the sealing cover (11) and the lower tank body (10) are mutually sealed when covered and connected, the sealing cover (11) is made of transparent materials, at least two supporting wheels (19) are arranged on the roller screen (6), and the roller screen (6) is in rolling contact with the inner wall of the lower tank body (10) through the supporting wheels (19).
6. The screening apparatus for screening small particle propellant as claimed in claim 5, wherein: the lower groove body (10) is provided with a powder outlet (12), a finished product outlet (13) and a long granule outlet (14).
7. The screening apparatus for screening small particle propellant as claimed in claim 6, wherein: the receiving mechanism comprises a powder receiving barrel (15) arranged right below the powder outlet (12), a finished product receiving barrel (16) arranged right below the finished product outlet (13), and a long granular material receiving barrel (17) arranged right below the long granular material outlet (14).
8. The screening apparatus for screening small particle propellant as claimed in claim 7, wherein: at least two powder outlets (12) are arranged, and a powder receiving barrel (15) is arranged under each powder outlet (12).
9. The screening apparatus for screening small particle propellant as claimed in claim 2, wherein: the screen drum component (3) further comprises a feed hopper (18) which is arranged on the frame (4) and is positioned right below the discharge port of the quantitative feeding belt conveyor (2), and the discharge port of the feed hopper (18) extends into the shell (5) and is butted with the roller screen (6).
10. The screening apparatus for screening small particle propellant as claimed in claim 2, wherein: the quantitative charging device is characterized by further comprising a PLC control cabinet (20) which is connected with the quantitative charging hopper (1), the quantitative charging belt conveyor (2) and the speed reducing motor (7) respectively, wherein anti-static grounding wires are arranged on the quantitative charging hopper (1), the quantitative charging belt conveyor (2), the shell (5) and the rack (4), and the resistance of the anti-static grounding wires is less than or equal to 4 omega.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123172583.0U CN216705011U (en) | 2021-12-16 | 2021-12-16 | Screening equipment for screening small-particle propellant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123172583.0U CN216705011U (en) | 2021-12-16 | 2021-12-16 | Screening equipment for screening small-particle propellant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216705011U true CN216705011U (en) | 2022-06-10 |
Family
ID=81885181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123172583.0U Active CN216705011U (en) | 2021-12-16 | 2021-12-16 | Screening equipment for screening small-particle propellant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216705011U (en) |
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2021
- 2021-12-16 CN CN202123172583.0U patent/CN216705011U/en active Active
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