CN213230023U - Storage unit and solid bulk continuous weighing and feeding device - Google Patents
Storage unit and solid bulk continuous weighing and feeding device Download PDFInfo
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- CN213230023U CN213230023U CN202022135340.9U CN202022135340U CN213230023U CN 213230023 U CN213230023 U CN 213230023U CN 202022135340 U CN202022135340 U CN 202022135340U CN 213230023 U CN213230023 U CN 213230023U
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Abstract
The utility model discloses a storage unit and solid bulk cargo feeder of weighing in succession, it belongs to chemical industry technical field, include: a material storage unit; the conveying unit is communicated with the discharge port and is provided with a discharge port, and the conveying unit conveys the materials entering from the discharge port to the discharge port and discharges the materials; a power unit; the transmission unit transmits the power of the power unit to the material storage unit and the conveying unit respectively and converts the power into the rotating force of the first stirring shaft and the conveying force of the conveying unit; a weighing unit; the utility model discloses a drive unit among the feeder of weighing in succession of solid bulk cargo can save a drive unit with power unit's power simultaneous transmission to first (mixing) shaft and auger, can reduce effectively the utility model discloses a whole weight weakens the utility model discloses vibration when the operation has improved the precision of weighing greatly.
Description
Technical Field
The utility model relates to a chemical industry technical field, concretely relates to storage unit and solid bulk cargo feeder of weighing in succession.
Background
When the tubular reactor is used for chemical production, materials need to be added continuously, and the requirement on the precision of the dosage is high, so that a weighing and feeding device is commonly used. However, the existing weighing and feeding device has the following disadvantages:
firstly, during feeding, the materials in the hopper can generate an arch formation phenomenon, the material downflow can be slowed down, the materials can not downflow seriously, the feeding continuity is influenced, and even the quality of the produced chemical products can be influenced; in order to solve the problem, a stirring mechanism comprising a motor is usually added at the top of the hopper or a stirring device is added at the bottom of the hopper and a vibration device is added on the cylinder, but the weight of the feeder is increased, a larger range of weightless scales needs to be selected, and the vibration of the whole equipment is aggravated due to the operation of the stirring mechanism or the vibration device, so that the weighing precision is influenced.
Secondly, as the material is in a small solid or powder shape, powder is generated when the weighing and feeding device is fed, and the powder is easy to leak, so that equipment pollution is caused; if with feed inlet and discharge gate sealing connection, because the influence of connector, influence the precision of weighing again. The specific reason is as follows: the weighing and feeding device is used for detecting residual materials in the hopper in real time, the feeding device can only be connected with the weighing sensor theoretically, and if the mouth and the discharge hole of the feeder are connected with the tubular reactor in a sealing mode through common canvas or steel tubes, the weighing precision is affected.
Third, the prior art is to connect smooth mounting panel and insulating pad with weighing sensor, and this kind of mode is unreliable, and when feeder had the vibration and rocked, weighing sensor can produce the skew, made the zero point of the weighing sensor who has adjusted produce the drift, influenced and weighed the precision.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a storage unit, first (mixing) shaft can rotate through dog drive second (mixing) shaft on the first stirring tooth when rotating the stirring, only need a driving source, and the effectual stirring scope that has enlarged has avoided "knot to encircle" phenomenon.
The utility model also provides a feeder that weighs in succession of solid bulk cargo can drive first (mixing) shaft and auger through a power pack and rotate simultaneously, and the effectual vibration of having avoided the power pack has guaranteed the precision of weighing to the influence of weighing.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
in one aspect, the utility model provides a storage unit, include:
a hopper having a discharge port;
the first stirring shaft is arranged in the hopper in a matching way, and first stirring teeth are arranged on the first stirring shaft;
the second stirring shaft is arranged in the hopper in a matching way, and second stirring teeth are arranged on the second stirring shaft;
the first stirring shaft can provide power for the rotation of the second stirring shaft.
As a preferable technical scheme, the first stirring tooth further comprises a stopper, the stopper is fixedly mounted on the first stirring tooth, and the stopper is in contact with the second stirring tooth in the rotating process, so as to provide power for the rotation of the second stirring shaft; an overlapping area is arranged between an area swept by the rotation of the second stirring teeth and an area swept by the rotation of the first stirring teeth, and at least one second stirring tooth is always arranged in the overlapping area.
As a preferable technical scheme, the hopper comprises a spherical hopper and a conical hopper which is arranged above the spherical hopper and communicated with the spherical hopper, the discharge port is arranged at the bottom of the spherical hopper, the first stirring shaft is positioned at the spherical hopper, the second stirring shaft is positioned at the conical hopper, and the second stirring shaft is positioned above the first stirring shaft.
As a preferable technical solution, the first stirring teeth are in an arc shape adapted to the inner surface of the spherical hopper; the second stirring teeth are arranged in a plurality of shapes, a plurality of the second stirring teeth are distributed along the circumferential direction of the second stirring shaft, each second stirring tooth is arranged along the radial direction of the second stirring shaft, and at least one stirring cross rod is arranged on one end, far away from the second stirring teeth, of the second stirring shaft.
In a second aspect, the utility model provides a solid bulk cargo feeder of weighing in succession, include:
the storage unit described above;
the conveying unit is communicated with the material storage unit and comprises a discharge hole, and the conveying unit conveys the materials entering from the material storage unit to the discharge hole and discharges the materials;
a power unit, the power unit providing power;
the transmission unit is respectively connected with the power unit, the material storage unit and the conveying unit;
the weighing unit is used for detecting the weight change of the materials in the hopper in real time;
the storage unit, the conveying unit, the power unit and the transmission unit are all installed on the weighing unit.
As a preferred technical scheme, the conveying unit comprises an auger chamber and an auger arranged in the auger chamber, and the auger chamber is communicated with the material storage unit through the discharge port; and the discharge port is arranged at the tail end of the packing auger chamber along the conveying direction of the packing auger.
As a preferred technical scheme, the packing augers are arranged in parallel, and the adjacent packing augers are in transmission through gears.
As a preferable technical solution, the power unit includes a motor and a speed reducer connected with an output shaft of the motor; the transmission unit comprises a first synchronous belt wheel, a second synchronous belt wheel, a third synchronous belt wheel and a synchronous belt, wherein the first synchronous belt wheel is coaxially and fixedly connected with an output shaft of the speed reducer, the second synchronous belt wheel is coaxially and fixedly connected with the first stirring shaft, the third synchronous belt wheel is coaxially and fixedly connected with the packing auger, and the synchronous belt is connected with the first synchronous belt wheel, the second synchronous belt wheel and the third synchronous belt wheel.
As a preferred technical scheme, the weighing unit includes weighing sensor, weighing sensor's top is equipped with the backup pad, the backup pad supports the storage unit the conveying unit the power pack with the drive unit, weighing sensor with it has insulating pad to inlay between the backup pad.
As a preferred technical solution, a first positioning assembly is disposed between the supporting plate and the insulating pad, the first positioning assembly includes a first groove and a first protrusion, the first protrusion is embedded in the first groove, and the first groove and the first protrusion are disposed on the supporting plate and the insulating pad, respectively; the insulation pad with be equipped with second locating component between the weighing sensor, second locating component includes second recess and second arch, the protruding embedding of second in the second recess, the second recess with the second arch is located respectively the insulation pad with on the weighing sensor.
The utility model has the advantages of that:
1. the utility model discloses a feeder that weighs in succession of solid bulk cargo adopts a driving source to provide power for stirring and transport simultaneously, adopts the design of two agitating unit about setting up, has solved the material top and has become hunch phenomenon to the problem of the vibrations influence precision of weighing that has avoided prior art to arouse for solving and become hunch phenomenon.
2. The utility model discloses a drive unit among the feeder of weighing in succession of solid bulk cargo can save a drive unit with power unit's power simultaneous transmission to first (mixing) shaft and auger, can reduce effectively the utility model discloses a whole weight has weakened the utility model discloses vibration when the operation, great improvement the precision of weighing.
3. The utility model discloses a conveying unit among the feeder of weighing in succession of solid bulk cargo can adopt the structure that many auger shafts arranged alternately, can increase the area of discharge port, makes the transport capacity grow of material, simultaneously, also can make the interior material of hopper more difficult for the knot encircle, carries more smoothly, has improved the conveying efficiency and the precision of weighing of material.
4. The utility model discloses an utilize the recess and the arch of matching between weighing sensor, insulating pad, the backup pad among the feeder of weighing in succession of solid bulk cargo, can be more effectual fixed effect between the improvement three, under the prerequisite that satisfies the insulation requirement, avoided the vibration and rocked the phenomenon of the zero drift of the weighing sensor who arouses, the effectual precision of weighing of having guaranteed.
5. The utility model discloses a feed inlet and discharge gate among the feeder of weighing in succession of solid bulk cargo adopt ultra-thin silicone tube to connect, can play sealed effect on the one hand, prevent that the dust is excessive, and on the other hand is because the silicone tube is softer, can reach the purpose that does not influence the precision of weighing again when the feed of weighing
Drawings
Fig. 1 is a schematic view of an overall structure of an embodiment of a middle storage unit according to the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 with the hopper removed;
fig. 3 is a schematic view of the overall structure of an embodiment of the continuous weighing and feeding device for solid bulk materials of the present invention;
FIG. 4 is a cross-sectional view of FIG. 3;
FIG. 5 is a schematic view of the auger structure in an embodiment of the continuous weighing and feeding device for bulk materials;
FIG. 6 is a schematic structural diagram of a transmission unit in an embodiment of the continuous weighing and feeding device for solid bulk materials of the present invention;
fig. 7 is an enlarged view of the area a in fig. 4.
In the figure: 1-a material storage unit, 11-a hopper, 12-a first stirring shaft, 13-a first stirring tooth, 14-a stop block, 15-a second stirring shaft, 16-a second stirring tooth, 17-a discharge port, 18-a stirring cross rod, 2-a conveying unit, 21-an auger chamber, 22-an auger, 3-a power unit, 31-a motor, 32-a speed reducer, 4-a transmission unit, 41-a first synchronous pulley, 42-a second synchronous pulley, 43-a third synchronous pulley, 44-a synchronous belt, 5-a weighing unit, 51-a weighing sensor, 52-a support plate and 53-an insulating pad.
Detailed Description
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
In a first aspect, please refer to fig. 1 and fig. 2, for the present invention provides an embodiment of a storage unit 1, which includes:
a hopper 11, the hopper 11 is provided with a discharge port 17, the hopper 11 is used for containing materials, and the materials can be discharged from the discharge port 17;
the first stirring shaft 12, at least part of the first stirring shaft 12 is arranged in the hopper 11, the first stirring shaft 12 is provided with a first stirring tooth 13, and the first stirring tooth 13 is provided with a stop block 14;
the second stirring shaft 15 is arranged in the hopper 11, and second stirring teeth 16 are arranged on the second stirring shaft 15;
in the period that first stirring tooth 13 rotates a week around the axis of first (mixing) shaft 12, dog 14 at least bumps with second stirring tooth 16 once, makes second (mixing) shaft 15 rotate, when first (mixing) shaft 12 drives first stirring tooth 13 and rotates, dog 14 can make second stirring tooth 16 and second (mixing) shaft 15 rotate to second stirring tooth 16 application of force, only need the first (mixing) shaft 12 pivoted driving source of a drive, can make first (mixing) shaft 12 and second (mixing) shaft 15 rotate simultaneously, has enlarged the stirring scope, has alleviateed the utility model discloses a total weight has avoided the influence of the vibration of a plurality of driving sources to the precision of weighing.
It should be noted that, referring to fig. 1 and fig. 2, the stopper 14 may be disposed at one side of the first stirring tooth 13, and when the stopper 14 rotates along with the first stirring tooth 13, an overlapping region is formed between a rotation region of at least a part of the stopper 14 and a rotation region of the second stirring tooth 16, and the size of the overlapping region should satisfy that a part of the second stirring tooth 16 is always located in the overlapping region in the rotation process of the second stirring tooth 16, that is, the stopper 14 may drive the second stirring tooth 16 to rotate; in other embodiments, the first stirring shaft 12 and the second stirring shaft 15 may be in transmission connection through a gear, a transmission belt or a transmission chain, and the linkage of the first stirring shaft 12 and the second stirring shaft 15 may also be realized.
On the basis of the above embodiment, referring to fig. 1 and fig. 2, the hopper 11 includes a spherical hopper and a conical hopper disposed above the spherical hopper and communicated with the spherical hopper, the discharge port 17 is disposed at the bottom of the spherical hopper, the first stirring shaft 12 is disposed at the spherical hopper, the second stirring shaft 15 is disposed at the conical hopper, and can stir the materials at the lower part and the upper part in the hopper 11 respectively; the spherical hopper can effectively avoid the phenomenon of arching; second stirring tooth 16 sets up to a plurality ofly, and a plurality of second stirring teeth 16 distribute along second (mixing) shaft 15's circumference, and every second stirring tooth 16 all sets up along second (mixing) shaft 15's radial, and at least one second stirring tooth 16 is kept away from second (mixing) shaft 15 and is served and be equipped with stirring horizontal pole 18, and stirring horizontal pole 18's other end is connected and can be connected with second (mixing) shaft 15, and stirring horizontal pole 18 can further improve the stirring effect.
On the basis of the above embodiments, referring to fig. 1 and fig. 2, the surface of the first rabble tooth 13 close to the spherical hopper is designed to be an arc shape matching with the inner surface of the spherical hopper, and the first rabble tooth 13 is designed to be bent, so that the shape of the first rabble tooth is more fit with the inner surface of the spherical hopper during rotation, thereby not only preventing the lower material from being arched, but also promoting the raw material in the spherical hopper to flow downwards and reducing the material residue.
In a second aspect, please refer to fig. 3 and fig. 4, for the present invention, an embodiment of a continuous weighing and feeding device for solid bulk material, includes:
the aforementioned storage unit 1;
the conveying unit 2 is communicated with the discharge port 17, and materials in the material storage unit 1 enter the conveying unit 2 through the discharge port 17; the conveying unit 2 is provided with a discharge port, and the conveying unit 2 conveys the materials entering from the discharge port 17 to the discharge port and discharges the materials;
the power unit 3 is used for providing power, and specifically, the power unit 3 is used for providing a driving force for driving the first stirring shaft 12 to rotate and a conveying force for conveying materials by the conveying unit 2;
the transmission unit 4 is connected with the power unit 3, the first stirring shaft 12 and the conveying unit 2 respectively, and the transmission unit 4 converts the power of the power unit 3 into the rotating force of the first stirring shaft 12 and the conveying force of the conveying unit 2;
and the weighing unit 5 is used for detecting the weight change of the material in the hopper 11 in real time by the weighing unit 5.
On the basis of the above embodiment, please refer to fig. 3 and 4, the conveying unit 2 includes an auger chamber 21 and an auger 22 disposed in the auger chamber 21, the auger chamber 21 is communicated with the discharge port 17, the discharge port is disposed at the end of the conveying direction of the auger 22, the power unit 3 is connected with the auger 22 through the transmission unit 4 to drive the auger 22 to rotate, so as to realize the conveying of the material, specifically, the rotary connection between the auger chamber 21 and the auger 22 can improve the sealing effect by arranging a sealing ring; further, referring to fig. 5, the two screw conveyors 22 can be arranged in parallel, and the adjacent screw conveyors 22 rotate synchronously through gear transmission, and in other embodiments, three or more screw conveyors 22 can be arranged to increase the conveying capacity.
In this embodiment, referring to fig. 4, the power unit 3 includes a motor 31 and a speed reducer 32 connected to the motor 31, specifically, an output shaft of the motor 31 is connected to an input shaft of the speed reducer 32, the motor 31 may be an explosion-proof variable frequency motor, and the speed reducer 32 may be a worm gear speed reducer.
On the basis of the above embodiment, please refer to fig. 4 and 6, the transmission unit 4 includes a first synchronous pulley 41 coaxially and fixedly connected to the output shaft of the speed reducer 32, a second synchronous pulley 42 coaxially and fixedly connected to the first stirring shaft 12, a third synchronous pulley 43 coaxially and fixedly connected to the packing auger 22, and a synchronous belt 44 connecting the first synchronous pulley 41, the second synchronous pulley 42, and the third synchronous pulley 43, the output shaft of the speed reducer 32 drives the first synchronous pulley 41 to simultaneously drive the second synchronous pulley 42 and the third synchronous pulley 43 to rotate through the synchronous belt 44, i.e., simultaneously drive the first stirring shaft 12 and the packing auger 22 to rotate, specifically, the synchronous belt 44 may further include an adjusting wheel for adjusting the tightness of the synchronous belt 44, the synchronous belt 44 may be a double-sided synchronous belt, the transmission unit 4 may further include a first synchronous pulley 41, a second synchronous pulley 42, a synchronous pulley 44, A third timing pulley 43 and a timing belt 44; in other embodiments, the transmission between the output shaft of the speed reducer 32 and the first stirring shaft 12 and the auger 22 can also be realized by means of gear transmission or chain transmission.
It should be noted that, referring to fig. 6, by adjusting the diameter ratio among the first synchronous pulley 41, the second synchronous pulley 42, and the third synchronous pulley 43, the rotation speed ratio among the output shaft of the speed reducer 32, the first stirring shaft 12, and the packing auger 22 can be effectively adjusted, so that the first stirring shaft 12 and the packing auger 22 are simultaneously within a reasonable rotation speed range.
In the present embodiment, referring to fig. 5 and fig. 7, the weighing unit 5 includes a weighing sensor 51, a supporting plate 52 is disposed above the weighing sensor 51, the supporting plate 52 supports the storage unit 1, the conveying unit 2, the power unit 3 and the transmission unit 4, and the weighing sensor 51 can weigh all the supports of the supporting plate 52; an insulating pad 53 is embedded between the weighing sensor 51 and the supporting plate 52, and the insulating pad 53 plays an insulating role; specifically, the weighing sensor 51 may be a PW10A single-point weighing sensor of an HBM manufacturer, and is connected to the controller for performing related parameter display and setting; further, a first positioning assembly is arranged between the supporting plate 52 and the insulating pad 53, the first positioning assembly comprises a first groove and a first protrusion, the first protrusion is embedded into the first groove, the first groove and the first protrusion are respectively arranged on the supporting plate 52 and the insulating pad 53, the relative position of the supporting plate 52 and the insulating pad 53 can be effectively fixed through the first groove and the first protrusion, preferably, the first groove is arranged on the supporting plate 52, and the insulating pad 53 can be embedded into the first groove; be equipped with second locating component between insulating pad 53 and weighing sensor 51, second locating component includes second recess and second arch, and in the second recess was inlayed to the second arch, on insulating pad 53 and weighing sensor 51 were located respectively to second recess and second arch, more excellent, on insulating pad 53 was located to the second recess, in partial weighing sensor 51 embedding second recess.
It should be noted that the supporting plate 52, the insulating pad 53, and the load cell 51 may be connected by screws to further improve the fixing effect.
It should be explained, should set up the feed inlet on the hopper 11, in order to guarantee continuity, leakproofness and the stability of material transmission, feed inlet department should set up the charge-in pipeline, and discharge gate department should set up ejection of compact pipeline, and the other end and the tubular reactor intercommunication of ejection of compact pipeline, simultaneously, in order to guarantee the precision of weighing, avoid having the interact of power between discharge gate and the tubular reactor, the preferred ultra-thin silica gel section of thick bamboo that adopts of ejection of compact pipeline.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Storage unit, its characterized in that includes:
a hopper having a discharge port;
the first stirring shaft is arranged in the hopper in a matching way, and first stirring teeth are arranged on the first stirring shaft;
the second stirring shaft is arranged in the hopper in a matching way, and second stirring teeth are arranged on the second stirring shaft;
the first stirring shaft can provide power for the rotation of the second stirring shaft.
2. The stock storage unit of claim 1, wherein the first stirring tooth further comprises a stop block, the stop block is fixedly arranged on the first stirring tooth, and the stop block is contacted with the second stirring tooth during rotation so as to provide power for rotation of the second stirring shaft; an overlapping area is arranged between an area swept by the rotation of the second stirring teeth and an area swept by the rotation of the first stirring teeth, and at least one second stirring tooth is always arranged in the overlapping area.
3. The storage unit according to claim 1, wherein the hopper comprises a spherical hopper and a conical hopper arranged above and communicated with the spherical hopper, the discharge port is arranged at the bottom of the spherical hopper, the first stirring shaft is arranged at the spherical hopper, the second stirring shaft is arranged at the conical hopper, and the second stirring shaft is arranged above the first stirring shaft.
4. The storage unit according to claim 3, characterized in that said first rabble tooth is provided in an arc shape adapted to the inner surface of said spherical hopper; the second stirring teeth are arranged in a plurality of shapes, a plurality of the second stirring teeth are distributed along the circumferential direction of the second stirring shaft, each second stirring tooth is arranged along the radial direction of the second stirring shaft, and at least one stirring cross rod is arranged on one end, far away from the second stirring teeth, of the second stirring shaft.
5. Solid bulk cargo feeder of weighing in succession, its characterized in that includes:
the storage unit according to any one of claims 1-4;
the conveying unit is communicated with the material storage unit and comprises a discharge hole, and the conveying unit conveys the materials entering from the material storage unit to the discharge hole and discharges the materials;
a power unit, the power unit providing power;
the transmission unit is respectively connected with the power unit, the material storage unit and the conveying unit;
the weighing unit is used for detecting the weight change of the materials in the hopper in real time;
the storage unit, the conveying unit, the power unit and the transmission unit are all installed on the weighing unit.
6. The solid bulk continuous weighing and feeding device according to claim 5, wherein the conveying unit comprises an auger chamber and an auger arranged in the auger chamber, and the auger chamber is communicated with the storage unit through the discharge port; and the discharge port is arranged at the tail end of the packing auger chamber along the conveying direction of the packing auger.
7. The solid bulk continuous weighing and feeding device according to claim 6, wherein the packing augers are arranged in parallel, and adjacent packing augers are driven by gears.
8. The solid bulk continuous weighing and feeding device according to claim 7, wherein the power unit comprises a motor and a speed reducer connected with an output shaft of the motor; the transmission unit comprises a first synchronous belt wheel, a second synchronous belt wheel, a third synchronous belt wheel and a synchronous belt, wherein the first synchronous belt wheel is coaxially and fixedly connected with an output shaft of the speed reducer, the second synchronous belt wheel is coaxially and fixedly connected with the first stirring shaft, the third synchronous belt wheel is coaxially and fixedly connected with the packing auger, and the synchronous belt is connected with the first synchronous belt wheel, the second synchronous belt wheel and the third synchronous belt wheel.
9. The solid bulk continuous weighing and feeding device according to claim 5, wherein the weighing unit comprises a weighing sensor, a support plate is arranged above the weighing sensor, the support plate supports the storage unit, the conveying unit, the power unit and the transmission unit, and an insulating pad is embedded between the weighing sensor and the support plate.
10. The continuous weighing and feeding device for bulk solid materials according to claim 9, wherein a first positioning assembly is arranged between the supporting plate and the insulating pad, the first positioning assembly comprises a first groove and a first protrusion, the first protrusion is embedded in the first groove, and the first groove and the first protrusion are respectively arranged on the supporting plate and the insulating pad; the insulation pad with be equipped with second locating component between the weighing sensor, second locating component includes second recess and second arch, the protruding embedding of second in the second recess, the second recess with the second arch is located respectively the insulation pad with on the weighing sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022135340.9U CN213230023U (en) | 2020-09-25 | 2020-09-25 | Storage unit and solid bulk continuous weighing and feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022135340.9U CN213230023U (en) | 2020-09-25 | 2020-09-25 | Storage unit and solid bulk continuous weighing and feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213230023U true CN213230023U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022135340.9U Active CN213230023U (en) | 2020-09-25 | 2020-09-25 | Storage unit and solid bulk continuous weighing and feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213230023U (en) |
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2020
- 2020-09-25 CN CN202022135340.9U patent/CN213230023U/en active Active
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