CN220835966U - Feeding device of jet mill - Google Patents
Feeding device of jet mill Download PDFInfo
- Publication number
- CN220835966U CN220835966U CN202320465350.XU CN202320465350U CN220835966U CN 220835966 U CN220835966 U CN 220835966U CN 202320465350 U CN202320465350 U CN 202320465350U CN 220835966 U CN220835966 U CN 220835966U
- Authority
- CN
- China
- Prior art keywords
- butterfly valve
- pneumatic butterfly
- variable frequency
- star
- feeder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000007599 discharging Methods 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
The utility model discloses a feeding device of an air mill, which comprises a star-type variable frequency feeder, a spiral variable frequency feeder and a feeding pipe; the outlet end of the spiral variable frequency feeder is communicated with the feed inlet of the air flow mill and is used for continuously conveying materials into the air flow mill; the top end of the feed pipe is communicated with the outlet end of the star-shaped variable frequency feeder, and the bottom end of the feed pipe is communicated with the inlet end of the spiral variable frequency feeder; wherein, the feeding pipe is sequentially provided with an upper pneumatic butterfly valve, a lower pneumatic butterfly valve and a discharging level gauge from top to bottom; when the height of the material in the feeding pipe reaches the position of the discharging level indicator, the upper pneumatic butterfly valve is opened, the star-type frequency conversion feeder operates for a preset time at a preset frequency, and then the upper pneumatic butterfly valve and the star-type frequency conversion feeder are closed, and the lower pneumatic butterfly valve is opened for discharging. Compared with the prior art, the feeding device can ensure that the feeding of the air flow mill is uniform and the working stability of the air flow mill is enhanced by only matching the star-shaped variable frequency feeder with the feeding of the upper pneumatic butterfly valve and the lower pneumatic butterfly valve.
Description
Technical Field
The utility model relates to the technical field of mechanical industry, in particular to a feeding device of an air flow mill.
Background
In the manufacturing process of the lithium battery anode material, a ternary precursor material crushing procedure is needed, and specifically, the material is injected into a crushing cavity of an air flow mill at a high speed through a Laval nozzle, and the material is repeatedly collided, rubbed and sheared at the junction of a plurality of high-pressure air flows to be crushed. The crushing chamber of air current mill passes through inlet pipe and star type conversion feeder intercommunication, and the inlet pipe sets gradually pneumatic butterfly valve, lower pneumatic butterfly valve along the feed direction, and upper and lower pneumatic butterfly valve can keep apart the feed end of inlet pipe, and the air current flows backwards when preventing the feeding: when the pneumatic butterfly valve is in operation, the pneumatic butterfly valve is closed firstly, the upper pneumatic butterfly valve is opened, the star-shaped variable frequency feeder works, and materials fall on the lower pneumatic butterfly valve; then the upper pneumatic butterfly valve is closed, the lower pneumatic butterfly valve is opened, and the air flow mill is fed; in the whole process, the star-type frequency conversion feeder continuously works, and the motor frequency of the star-type frequency conversion feeder is adjusted according to the weighing of the jet mill, so that the feeding flow is adjusted.
However, in the feeding process, the upper pneumatic butterfly valve and the lower pneumatic butterfly valve are alternately and circularly opened and closed, so that the backflow interference of air flow can be solved, but the feeding to the air flow mill is pulsed feeding, and the feeding is uneven.
In addition, because of the pulsation of the feeding, the weight displayed by the air mill is difficult to stabilize and accurately, and the motor frequency of the star-type variable frequency feeder is difficult to accurately adjust, so that the feeding flow adjustment of the air mill is inaccurate.
Therefore, how to continuously feed the air mill to improve the uniformity of the feeding of the air mill is a problem to be solved by those skilled in the art.
Disclosure of utility model
In view of the above, the utility model provides a feeding device of an air mill, which continuously conveys materials into the air mill through a spiral variable frequency feeder, and compared with the feeding mode of only matching a star-shaped variable frequency feeder with an upper pneumatic butterfly valve and a lower pneumatic butterfly valve in the prior art, the feeding device of the air mill can ensure that the feeding of the air mill is uniform and the working stability of the air mill is enhanced.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
A feeder device for an air mill, comprising:
A star-type variable frequency feeder;
The outlet end of the spiral variable frequency feeder is communicated with the feeding inlet of the air flow mill and is used for continuously conveying materials into the air flow mill;
the top end of the feeding pipe is communicated with the outlet end of the star-shaped variable frequency feeder, and the bottom end of the feeding pipe is communicated with the inlet end of the spiral variable frequency feeder;
Wherein, the feeding pipe is sequentially provided with an upper pneumatic butterfly valve, a lower pneumatic butterfly valve and a discharging level gauge from top to bottom; when the material height in the feeding pipe reaches the position of the discharging level gauge, the upper pneumatic butterfly valve is opened, the star-type variable frequency feeder operates for a preset time at a preset frequency, and then the upper pneumatic butterfly valve and the star-type variable frequency feeder are closed, and the lower pneumatic butterfly valve is opened for discharging.
Preferably, in the feeding device of the air flow mill, the feeding pipe is further provided with an upper level gauge, and the upper level gauge is located between the lower pneumatic butterfly valve and the lower level gauge.
Preferably, in the feeding device of the air flow mill, the star-shaped variable frequency feeder, the spiral variable frequency feeder, the upper pneumatic butterfly valve and the lower pneumatic butterfly valve are respectively controlled by a controller; and the loading level gauge and the unloading level gauge are respectively connected with the controller in a signal manner.
Preferably, in the feeding device of the jet mill, the feeding level gauge is a damping type level gauge.
Preferably, in the feeding device of the jet mill, the inlet end and the outlet end of the spiral variable frequency feeder are connected through a communicating pipe, and the communicating pipe is provided with a balance valve.
Preferably, in the feeding device of the jet mill, an inlet of the star-shaped variable frequency feeder is communicated with the pre-crushing bin, and a manual butterfly valve is arranged between the star-shaped variable frequency feeder and the pre-crushing bin.
Preferably, in the feeding device of the air flow mill, the aperture of a part of the feeding pipe located between the upper pneumatic butterfly valve and the lower pneumatic butterfly valve is uniform, or the part is in a shape with a thin middle and thick two ends.
Preferably, in the feeding device of the jet mill, a portion of the feeding pipe located between the upper level gauge and the lower level gauge has a uniform aperture, or the portion has a shape with a thin middle and thick two ends.
The utility model provides a feeding device of an air mill, which comprises a star-type variable frequency feeder, a spiral variable frequency feeder and a feeding pipe; the outlet end of the spiral variable frequency feeder is communicated with the feed inlet of the air flow mill and is used for continuously conveying materials into the air flow mill; the top end of the feed pipe is communicated with the outlet end of the star-shaped variable frequency feeder, and the bottom end of the feed pipe is communicated with the inlet end of the spiral variable frequency feeder; wherein, the feeding pipe is sequentially provided with an upper pneumatic butterfly valve, a lower pneumatic butterfly valve and a discharging level gauge from top to bottom; when the height of the material in the feeding pipe reaches the position of the discharging level indicator, the upper pneumatic butterfly valve is opened, the star-type frequency conversion feeder operates for a preset time at a preset frequency, and then the upper pneumatic butterfly valve and the star-type frequency conversion feeder are closed, and the lower pneumatic butterfly valve is opened for discharging.
When the feeding pipe feeding device is applied, the feeding level gauge can detect the lower limit of the feeding level, the star-shaped variable frequency feeder is matched with the upper pneumatic butterfly valve and the lower pneumatic butterfly valve to convey materials into the feeding pipe when the feeding level reaches the lower limit, so that the inlet end of the spiral variable frequency feeder is always provided with materials, and the materials can be continuously conveyed into the air flow mill.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of a feeding device of an air mill according to an embodiment of the present utility model;
FIG. 2 is a control schematic diagram of a controller according to an embodiment of the present utility model;
Wherein, in fig. 1-2:
A pre-crushing bin 1; a manual butterfly valve 2; a star-type variable frequency feeder 3; an upper pneumatic butterfly valve 4; a lower pneumatic butterfly valve 5; a loading level gauge 6; a blanking level gauge 7; a balancing valve 8; a spiral variable frequency feeder 9; an air flow mill 10; a controller 11.
Detailed Description
The embodiment of the utility model discloses a feeding device of an air mill, which continuously conveys materials into the air mill through a spiral variable frequency feeder.
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, an embodiment of the present utility model provides a feeding device of an air mill, which includes a star-type variable frequency feeder 3, a spiral variable frequency feeder 9 and a feeding pipe; the outlet end of the spiral variable frequency feeder 9 is communicated with the feed inlet of the air mill 10 and is used for continuously conveying materials into the air mill 10; the top end of the feed pipe is communicated with the outlet end of the star-shaped variable frequency feeder 3, and the bottom end of the feed pipe is communicated with the inlet end of the spiral variable frequency feeder 9; wherein, the feeding pipe is sequentially provided with an upper pneumatic butterfly valve 4, a lower pneumatic butterfly valve 5 and a discharging level gauge 7 from top to bottom; when the material height in the feeding pipe reaches the position of the discharging level gauge 7, the upper pneumatic butterfly valve 4 is opened, the star-type frequency conversion feeder 3 operates for a preset time at a preset frequency, and then the upper pneumatic butterfly valve 4 and the star-type frequency conversion feeder 3 are closed, and the lower pneumatic butterfly valve 5 is opened for discharging.
During the application, the material level lower limit of the feeding pipe can be detected by the material level gauge 7, the star-shaped variable frequency feeder 3 is matched with the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 to convey materials into the feeding pipe when the material level reaches the lower limit, so that the inlet end of the spiral variable frequency feeder 9 is always provided with materials, and the materials can be continuously conveyed into the air flow mill 10.
In addition, the continuous feeding of the air flow mill 10 can enhance the weighing stability of the air flow mill 10, the weighing structure is closer to a true value, and the feeding flow of the air flow mill 10 can be conveniently adjusted according to feedback after crushing.
The preset frequency and the running preset time of the star-type variable frequency feeder 3 are related to the volume V1 between the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 in the feeding pipe: if the volume of the material conveyed by the star-type frequency conversion feeder 3 for one revolution is V2, the preset frequency is h, and the running preset time t is required to meet the requirement that V2 is equal to or less than h and is equal to or less than V1, so that the upper pneumatic butterfly valve 4 cannot be closed because the height of the material exceeds the upper pneumatic butterfly valve 4 after the star-type frequency conversion feeder 3 runs for the preset time at the preset frequency.
Preferably, in the feeding device of the air flow mill 10, the feeding pipe is further provided with an upper level indicator 6, the upper level indicator 6 is located between the lower pneumatic butterfly valve 5 and the lower level indicator 7, and is used for detecting whether the material reaches the upper limit position of the upper level indicator 6 when the feeding device is pre-fed, so as to prevent the lower pneumatic butterfly valve 5 from being closed due to the fact that the material is too high.
Specifically, in the feeding device of the jet mill 10, the star-type variable frequency feeder 3, the spiral variable frequency feeder 9, the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 are respectively controlled by the controller 11; the loading level gauge 6 and the unloading level gauge 7 are respectively connected with a controller 11 in a signal way. The controller 11 may be configured as a PLC (Programmable Logic Controller ).
The loading level gauge 6 may be configured as a damped level gauge, and the unloading level gauge 7 may be configured as a damped level gauge. The kind of the level gauge is not limited in this embodiment.
The inlet end and the outlet end of the spiral variable frequency feeder 9 are connected through a communicating pipe, and the communicating pipe is provided with a balance valve 8 to keep the air pressure balance at the inlet end and the outlet end of the spiral variable frequency feeder 9, so that the spiral variable frequency feeder 9 has no air flow interference effect when conveying materials. Specifically, the two ends of the communicating pipe provided with the balance valve 8 are respectively communicated with the inlet end and the outlet end of the spiral variable frequency feeder 9 to form a communicating vessel structure, and the pressure intensity at the inner part of the communicating vessel structure is equal, so that the air pressure of the inlet end and the outlet end of the spiral variable frequency feeder 9 is balanced.
The inlet of the star-shaped variable frequency feeder 3 is communicated with the pre-crushing bin 1, and a manual butterfly valve 2 is arranged between the star-shaped variable frequency feeder 3 and the pre-crushing bin 1. When the jet mill 10 works normally, the manual butterfly valve 2 below the pre-crushing bin 1 is opened. The manual butterfly valve 2 plays a role in mechanically isolating the pre-crushing bin 1 and the star-type variable frequency feeder 3; when the star-type variable frequency feeder 3 is damaged and needs to be repaired or replaced and the pre-crushing bin 1 is filled with materials, the manual butterfly valve 2 needs to be cut off; when the production is finished, the manual butterfly valve 2 is cut off, so that foreign matters are prevented from entering the star-type frequency conversion feeder 3 to cause the blockage of the star-type frequency conversion feeder 3, and the star-type frequency conversion feeder is difficult to start.
The aperture of the part of the feed pipe between the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 can be set to be uniform; or the part is in a shape with a thin middle part and thick two ends (i.e. drum-shaped), and an excitation block is arranged on the part to prevent bridging of materials.
The aperture of the part of the feed pipe between the upper level gauge 6 and the lower level gauge 7 can be set to be uniform; or the part of the feeding pipe between the upper level gauge and the lower level gauge is in a shape of thin middle and thick two ends (i.e. drum shape), and an excitation block is arranged on the part so as to prevent the bridging of materials.
The following specifically describes the operation flow of the feeding device of the jet mill provided in this embodiment:
1. Pre-feed
The spiral variable frequency feeder 9 and the air mill 10 wait (i.e. the two are not opened), the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 are opened, the star variable frequency feeder 3 rotates for feeding until the feeding reaches the position of the upper level gauge 6, the star variable frequency feeder 3 stops rotating, and the lower pneumatic butterfly valve 5 is closed.
2. Working feed
The air mill 10 works, and the spiral variable frequency feeder 9 is started and conveys materials to the air mill 10; the material in the feeding pipe gradually decreases, when the material level drops to the position of the discharging level indicator 7, the upper pneumatic butterfly valve 4 is opened, the star-type frequency conversion feeder 3 rotates for feeding, the preset time t and the preset frequency h of the operation of the star-type frequency conversion feeder 3 are related to the volume V1 between the upper pneumatic butterfly valve and the lower pneumatic butterfly valve (namely, the volume V2 is smaller than or equal to the volume V1);
When the materials between the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 meet the set requirements (namely, when the star-type variable frequency feeder 3 runs for a preset time at a preset frequency), the upper pneumatic butterfly valve 4 is closed, the star-type variable frequency feeder 3 stops, then the lower pneumatic butterfly valve 5 is opened, the materials are supplemented into the space between the upper material level gauge 6 and the lower material level gauge 7, and one-time blanking is completed;
when the level drops again to the level meter 7, the above is repeated.
3. Stopping feeding
When the controller 11 receives a feeding stopping command input by a user, the star-shaped variable frequency feeder 3 is not opened any more, the upper pneumatic butterfly valve 4 is closed, the lower pneumatic butterfly valve 5 is opened, the spiral variable frequency feeder 9 continuously rotates until the air mill 10 displays weight return to zero, and the whole process is finished.
In the operation flow of the feeding device, the actions of the star-shaped variable frequency feeder 3, the upper pneumatic butterfly valve 4, the lower pneumatic butterfly valve 5, the spiral variable frequency feeder 9 and the jet mill 10 are controlled by the controller 11; the detection results of the loading level gauge 6 and the unloading level gauge 7 are transmitted to the controller 11.
The volume of the part of the feeding pipe between the upper pneumatic butterfly valve 4 and the lower pneumatic butterfly valve 5 is V1, the volume of the part of the feeding pipe between the upper level gauge 6 and the lower level gauge 7 is V3, and V1 is not more than V3, so that the lower pneumatic butterfly valve 5 is prevented from being opened, and the lower pneumatic butterfly valve 5 is prevented from being closed due to the fact that the material level is too high after blanking.
The controller 11 can set the preset frequency and preset time of the operation of the star-type frequency conversion feeder 3 and the opening condition (namely, when the upper pneumatic butterfly valve 4 is opened, the star-type frequency conversion feeder 3 is immediately opened); the controller 11 also sets the upper pneumatic butterfly valve 4 to be associated with the lower pneumatic butterfly valve 5, i.e. the upper pneumatic butterfly valve 4 is closed when the lower pneumatic butterfly valve 5 is open and the upper pneumatic butterfly valve 4 is open when the lower pneumatic butterfly valve 5 is closed.
The screw frequency conversion feeder 9 screw frequency conversion feeds, and a controller 11 inputs a command to adjust the feeding flow.
The feeding device provided by the embodiment adopts a double-level gauge design, so that the inlet end of the spiral variable frequency feeder 9 always keeps certain material precompression, the bulk density of feeding of the spiral variable frequency feeder 9 is kept stable, the relation between the feeding volume and the quality of the spiral variable frequency feeder 9 is kept stable, and further the feeding of the feeding device is continuous and stable.
The feeding device provided by the embodiment adopts the design of the double pneumatic butterfly valve, and the interference of air flow pressure on the upper part of the feeding pipe is solved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A feeder for an air mill, comprising:
A star-type variable frequency feeder;
The outlet end of the spiral variable frequency feeder is communicated with the feeding inlet of the air flow mill and is used for continuously conveying materials into the air flow mill;
the top end of the feeding pipe is communicated with the outlet end of the star-shaped variable frequency feeder, and the bottom end of the feeding pipe is communicated with the inlet end of the spiral variable frequency feeder;
Wherein, the feeding pipe is sequentially provided with an upper pneumatic butterfly valve, a lower pneumatic butterfly valve and a discharging level gauge from top to bottom; when the material height in the feeding pipe reaches the position of the discharging level gauge, the upper pneumatic butterfly valve is opened, the star-type variable frequency feeder operates for a preset time at a preset frequency, and then the upper pneumatic butterfly valve and the star-type variable frequency feeder are closed, and the lower pneumatic butterfly valve is opened for discharging.
2. The feeding device of an air flow mill according to claim 1, wherein the feeding pipe is further provided with an upper level gauge, which is located between the lower pneumatic butterfly valve and the lower level gauge.
3. The feeding device of an air mill according to claim 2, wherein the star-type variable frequency feeder, the spiral variable frequency feeder, the upper pneumatic butterfly valve and the lower pneumatic butterfly valve are respectively controlled by a controller; and the loading level gauge and the unloading level gauge are respectively connected with the controller in a signal manner.
4. The feeding device of an air mill according to claim 2, wherein the loading level gauge is a damped level gauge.
5. The feeding device of an air mill according to claim 1, wherein the inlet end and the outlet end of the spiral variable frequency feeder are connected by a communicating pipe, the communicating pipe being provided with a balancing valve.
6. The feeding device of an air mill according to claim 1, wherein an inlet of the star-type variable frequency feeder is communicated with a pre-crushing bin, and a manual butterfly valve is arranged between the star-type variable frequency feeder and the pre-crushing bin.
7. A feeding device for an air flow mill according to claim 1, wherein the aperture of the portion of the feeding pipe located between the upper pneumatic butterfly valve and the lower pneumatic butterfly valve is uniform, or the portion is in a shape of thin middle and thick ends.
8. The feeding device of an air flow mill according to claim 2, wherein the aperture of the portion of the feeding pipe located between the upper level gauge and the lower level gauge is uniform, or the portion is in a shape of thin middle and thick ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320465350.XU CN220835966U (en) | 2023-03-13 | 2023-03-13 | Feeding device of jet mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320465350.XU CN220835966U (en) | 2023-03-13 | 2023-03-13 | Feeding device of jet mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220835966U true CN220835966U (en) | 2024-04-26 |
Family
ID=90776694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320465350.XU Active CN220835966U (en) | 2023-03-13 | 2023-03-13 | Feeding device of jet mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220835966U (en) |
-
2023
- 2023-03-13 CN CN202320465350.XU patent/CN220835966U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2022528029A (en) | Calibration method for liquid flowmeter | |
| CN110182608B (en) | Metering device and metering method | |
| CN220835966U (en) | Feeding device of jet mill | |
| CN209802466U (en) | Metering device | |
| JP2012188282A (en) | Powder volumetric feeding method | |
| CN203227462U (en) | Dosing mixing unit | |
| CN103747948B (en) | Granulating system | |
| CN213153686U (en) | Grouting machine | |
| CN201800926U (en) | Automatic metering and continuous production equipment for mixed grain rice composite flour | |
| CN207088239U (en) | A kind of automatic charging device | |
| CN218139775U (en) | CPP production is with material loading extruder convenient to control extrusion capacity | |
| CN216627472U (en) | Feeding system with mix and join in marriage little storehouse cabinet | |
| CN207995887U (en) | A kind of online drawing-in device of wheat germ | |
| CN211616216U (en) | A mix dosing unit for plastic film preparation | |
| CN210884332U (en) | High-precision aggregate feeding device | |
| CN109331726B (en) | Automatic production device and production method for polyurethane coating | |
| CN207786782U (en) | The adjustable sand making machine of yield | |
| CN208601699U (en) | A kind of extruder | |
| US20190246674A1 (en) | Blending System for Amino Acid Nitrogen Value Adjustment for Soy Sauce | |
| CN108267203A (en) | Light material metering equipment and control method and device thereof | |
| CN221542862U (en) | A discharge apparatus for controlling powder material is stable | |
| CN212937767U (en) | Rice and flour front-section blending device | |
| CN213443170U (en) | Metering feeding device for automatic packaging machine | |
| CN210674869U (en) | Automatic reducing sugar adding and premixing system used in soft white sugar production process | |
| CN216335375U (en) | Hierarchical feeding device of electronic glass kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |