CN216537838U - Hollow fiber membrane stretching equipment - Google Patents
Hollow fiber membrane stretching equipment Download PDFInfo
- Publication number
- CN216537838U CN216537838U CN202122897187.8U CN202122897187U CN216537838U CN 216537838 U CN216537838 U CN 216537838U CN 202122897187 U CN202122897187 U CN 202122897187U CN 216537838 U CN216537838 U CN 216537838U
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- Prior art keywords
- fiber membrane
- stretching
- section
- guide rail
- hollow fiber
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- 239000012528 membrane Substances 0.000 title claims abstract description 125
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 109
- 239000004744 fabric Substances 0.000 claims abstract description 89
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000003825 pressing Methods 0.000 claims description 21
- 238000004513 sizing Methods 0.000 claims description 17
- 238000005520 cutting process Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims 2
- 239000007788 liquid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 4
- 238000009941 weaving Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Treatment Of Fiber Materials (AREA)
Abstract
The utility model relates to the field of hollow fiber membrane manufacturing, in particular to a hollow fiber membrane drawing device, which comprises a drawing mechanism, an unreeling mechanism arranged on the right side of the drawing mechanism, and a reeling mechanism arranged on the left side of the drawing mechanism; a heating oven is coated outside the stretching mechanism; the stretching mechanism comprises a guide rail and a clamping mechanism arranged on the guide rail, and the clamping mechanism moves along the guide rail; the guide rail includes two tracks that the symmetry set up, and the guide rail is including tensile section, and the interval of two tracks in the tensile section is crescent from the right side to the left. According to the utility model, the original fiber of the fiber membrane is woven into the fiber membrane cloth, and then the whole fiber membrane cloth is stretched, so that the stretching is uniform and stable, the pore-forming is uniform, the problem that the membrane fiber is easy to damage when being woven after stretching is solved, the membrane forming quality is well ensured, the cost is reduced, and the efficiency is improved.
Description
Technical Field
The utility model relates to the field of hollow fiber membrane manufacturing, in particular to hollow fiber membrane stretching equipment.
Background
The hollow fiber membrane is a separation membrane of permselective hollow fibers with micropores on the fiber wall, and the size of the micropores is from nanometer to micron. In the production and manufacturing process of hollow fiber membranes in the current market, a box type stretching machine is mainly adopted for stretching step by step and section by section, and the following technical problems exist: the single membrane yarn can not be continuously stretched, the later processing is difficult, the material waste is large, the efficiency is low, the energy consumption is large, the stretching thickness of the membrane yarn is not uniform, and the like, and the membrane yarn is easily damaged in the weaving and finishing process after stretching.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide hollow fiber membrane stretching equipment, which is used for stretching fiber membrane raw filaments after weaving fiber membrane cloth on the stretching equipment, realizing uniform stretching of the fiber membrane through sectional stretching and zone heating, and avoiding the problem that the fiber membrane raw filaments are easily damaged after stretching and weaving finishing.
In order to achieve the purpose, the utility model provides hollow fiber membrane stretching equipment which comprises a stretching mechanism, an unreeling mechanism arranged on the right side of the stretching mechanism and a reeling mechanism arranged on the left side of the stretching mechanism; a heating oven is coated outside the stretching mechanism; the stretching mechanism comprises a guide rail and a clamping mechanism arranged on the guide rail, and the clamping mechanism moves along the guide rail; the guide rail includes two tracks of symmetry setting, and the guide rail includes tensile section, and the interval of two tracks in the tensile section is crescent from the right side to the left.
Furthermore, the clamping mechanism is provided with a plurality of fixed needle plates which are installed on the two rails in pairs.
Furthermore, a process edge sizing mechanism is arranged at the right end of the stretching mechanism, and a process edge cutting mechanism is arranged at the left end of the stretching mechanism.
Furthermore, a fiber film cloth pressing mechanism and a fiber film cloth stripping mechanism are further arranged on the stretching mechanism, the fiber film cloth pressing mechanism is arranged on the left side of the technological edge sizing mechanism, and the fiber film cloth stripping mechanism is arranged on the right side of the technological edge cutting mechanism.
Furthermore, one section of the guide rail close to the unwinding mechanism is a feeding section, one section of the guide rail close to the winding mechanism is a discharging section, the two rails are arranged in parallel with the feeding section, the distance between the feeding section and the discharging section is smaller than that between the discharging section, one section of the distance between the feeding section and the discharging section is a stretching section, the process edge sizing mechanism and the fiber membrane cloth pressing mechanism are fixedly installed on the feeding section, and the process edge cutting mechanism and the fiber membrane cloth stripping mechanism are fixedly installed on the discharging section.
Further, the stretching section comprises at least one stretching section, and the distance between the two tracks in each stretching section is gradually increased from right to left.
Further, the heating oven comprises at least one partition, and each partition is provided with a temperature control device.
Furthermore, unwinding mechanism and winding mechanism all are provided with tension detection device.
Furthermore, the stretching mechanism further comprises a chain, the chain moves on the guide rail, and the clamping mechanism is fixed on the chain.
Compared with the prior art, the utility model has the beneficial effects that:
1) the utility model adopts the variable-interval track to stretch the fiber membrane cloth, and the interval is adjustable in sections, so that the stretching of the fiber membrane cloth is completed in stages, and a more stable stretching effect is realized.
2) The heating oven is coated outside the stretching mechanism, so that more efficient heating is realized, the temperature of the heating oven is controlled in a subarea manner, different temperatures can be adjusted according to different stretching stages of the fiber membrane cloth, and a better stretching effect is realized.
3) According to the utility model, the original fiber of the fiber membrane is woven into the fiber membrane cloth, and then the whole fiber membrane cloth is stretched, so that the stretching is uniform and stable, the pore-forming is uniform, the problem that the membrane fiber is easy to damage when being woven after stretching is solved, the membrane forming quality is well ensured, the cost is reduced, and the efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a hollow fiber membrane drawing apparatus of the present invention;
FIG. 2 is a plan view of a hollow fiber membrane drawing apparatus of the present invention;
FIG. 3 is a schematic view showing the moving direction of the fiber membrane cloth according to the present invention;
FIG. 4 is a schematic view of the overall structure of the fixing needle plate of the present invention;
FIG. 5 is a schematic view of the overall structure of the unwinding mechanism of the present invention;
FIG. 6 is a schematic view of the overall structure of the edge sizing mechanism and the fiber membrane cloth pressing mechanism of the utility model.
In the figure: 1-stretching mechanism, 2-unreeling mechanism, 3-reeling mechanism, 4-heating oven, 5-process edge sizing mechanism, 6-process edge cutting mechanism, 7-fiber membrane cloth pressing mechanism, 8-fiber membrane cloth stripping mechanism, 11-guide rail, 12-clamping mechanism, 13-chain, 21-tension detection device, 22-air expansion shaft, 51-sizing wheel, 52-dryer, 71-positioning guide wheel, 72-pressing brush wheel, 111-rail, 112-feeding section, 113-stretching section, 114-discharging section and 121-fixing needle plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The utility model is discussed in detail below with reference to figures 1 to 6 and specific embodiments:
the embodiment of the utility model provides hollow fiber membrane stretching equipment, which comprises a stretching mechanism 1, an unreeling mechanism 2 arranged on the right side of the stretching mechanism 1 and a reeling mechanism 3 arranged on the left side of the stretching mechanism 1, wherein the unreeling mechanism 2 is arranged on the right side of the stretching mechanism 1; unwinding mechanism 2 emits the fibre membrane cloth of having worked out to the speed of control unreeling, fibre membrane cloth is stretched through stretching mechanism 1, obtains stretch forming's fibre membrane, and the fibre membrane cloth rolling of accomplishing of will stretching through winding mechanism 3 at last, and winding mechanism 3 controls the speed of rolling. The outside cladding of drawing mechanism 1 has heating oven 4, and heating oven 4 is used for carrying out the heat treatment design to the fibre membrane when fibre membrane cloth is stretched, and heating oven 4's clad structure is favorable to realizing more efficient heating. The stretching mechanism 1 comprises a guide rail 11 and a clamping mechanism 12 arranged on the guide rail 11, and the clamping mechanism 12 moves along the guide rail 11; the clamping mechanism 12 is used for clamping and fixing the fiber membrane cloth, and the fiber membrane cloth is stretched and formed in the process of moving along the guide rail 11. The guide rail 11 comprises two symmetrically arranged rails 111, the guide rail 11 comprises a stretching section 113, and the distance between the two rails 111 in the stretching section 113 is gradually increased from right to left; the fiber membrane cloth is widened along with the increase of the space between the tracks 111, and the stretching effect is realized.
Further, the clamping mechanism 12 is provided with a plurality of fixing needle plates 121, and the fixing needle plates 121 are installed on the two rails 111 in pairs; the fixed needle plate 121 pierces through the fiber membrane cloth, fixes the fiber membrane cloth on the clamping mechanism 12, and the fixed needle plate 121 that sets up in pairs fixes the both sides of fiber membrane cloth, and when the interval of track 111 increased, the fixed needle plate 121 interval that sets up in pairs also increased thereupon to widen the fiber membrane cloth.
Further, a process edge sizing mechanism 5 is arranged at the right end of the stretching mechanism 1, and a process edge cutting mechanism 6 is arranged at the left end of the stretching mechanism 1; the technical edge sizing mechanism 5 is used for coating the technical edges on the two sides of the fiber membrane cloth into a whole, so that the strength of the fiber membrane cloth is improved, the problems of thread falling, scattering and the like of the fiber membrane cloth are avoided, particularly, when the fiber membrane cloth is pierced by the fixing needle plate 121, the problem of thread falling caused by the fact that fiber membrane protofilaments are punctured is avoided, and meanwhile, the problems that the needle plate is separated from the fiber membrane cloth or the fiber membrane cloth is scattered and the like can be avoided during stretching; the technical edge cutting mechanism 6 is used for cutting and removing the coated technical edge to obtain a completely stretched fiber film.
Specifically, the technical edge sizing mechanism 5 comprises two sizing wheels 51 arranged at two sides of the guide rail 11 and a dryer 52 arranged at the left side of the sizing wheels 51; the coating wheel 51 is used for coating the technical edges of the two sides of the fiber membrane cloth into a whole, and the dryer 52 is used for drying and fixing the coated technical edges.
Further, the stretching mechanism 1 is also provided with a fiber membrane cloth pressing mechanism 7 and a fiber membrane cloth stripping mechanism 8, the fiber membrane cloth pressing mechanism 7 is arranged on the left side of the technical edge sizing mechanism 5, and the fiber membrane cloth stripping mechanism 8 is arranged on the right side of the technical edge cutting mechanism 6; the fiber membrane cloth pressing mechanism 7 is used for pressing and fixing the fiber membrane cloth on the clamping mechanism 12, and the fiber membrane cloth stripping mechanism 8 is used for stripping the fiber membrane cloth from the clamping mechanism 12.
Specifically, the fiber membrane cloth pressing mechanism 7 comprises a positioning guide wheel 71 arranged above the guide rail 11 and a pressing brush wheel 72 arranged on the left side of the positioning guide wheel 71; the positioning guide wheel 71 is used for pressing the fiber membrane cloth downwards to the vicinity of the clamping mechanism 12, and the pressing brush wheel 72 is used for pressing the fiber membrane cloth in and penetrating through the fixing needle plate 121 for fixing.
Further, a section of the guide rail 11 close to the unwinding mechanism 2 is a feeding section 112, a section of the guide rail 11 close to the unwinding mechanism 2 is a blanking section 114, the two rails 111 are arranged in parallel to the feeding section 112 and the blanking section 114, the distance between the two rails 111 and the feeding section 112 is smaller than that between the two rails 114, a section with a variable distance between the feeding section 112 and the blanking section 114 is a stretching section 113, the technical edge sizing mechanism 5 and the fiber membrane cloth pressing mechanism 7 are fixedly mounted on the feeding section 112, and the technical edge cutting mechanism 6 and the fiber membrane cloth peeling mechanism 8 are fixedly mounted on the blanking section 114; the feeding section 112 is used for carrying out process edge sizing and compressing and fixing the fiber membrane cloth, and the discharging section 114 is used for carrying out process edge cutting and stripping the fiber membrane cloth; the two rails 111 are arranged in parallel in the feeding section 112 and the discharging section 114, so that the fiber membrane cloth can stably move before and after being pressed and fixed with the clamping mechanism 12 and after being peeled off, and the fiber membrane cloth cannot deviate from the direction of the guide rail 11.
Further, the stretching section 113 comprises at least one stretching section, and the distance between the two tracks 111 in each stretching section gradually increases from right to left; the included angle of the two tracks 111 in each stretching section is independently arranged and can be independently adjusted; the different stretching speeds that make fibre membrane cloth of contained angle are different, and can adjust according to the particular case of fibre membrane cloth.
Further, the heating oven 4 comprises at least one partition, and each partition is provided with a temperature control device; the heating oven 4 increases or decreases the subareas according to different processes, each subarea independently controls the temperature, the temperature can be adjusted according to the specific stretching speed and the stretching stage, and the stretching efficiency is improved.
Specifically, the heating oven 4 can be heated by steam, oil bath or electric heating tubes, and the heating temperature control function can be realized.
Further, the unwinding mechanism 2 and the winding mechanism 3 are both provided with a tension detection device 21; the tension detection device 21 can detect the tension at any time, and adjust the speed of the unwinding mechanism 2 and the winding mechanism 3 according to the detection result so as to ensure that the fiber membrane cloth is not damaged; specifically, the unwinding mechanism 2 is driven by an air expansion shaft 22 controlled by a servo motor, and is used for controlling the unwinding speed.
Further, the stretching mechanism 1 further comprises a chain 13, the chain 13 moves on the guide rail 11, and the clamping mechanism 12 is fixed on the chain 13; the chain 13 drives the clamping mechanism 12 to drive the fiber membrane cloth to move and complete stretching and shaping; the chain 13 moves along with the shape of the irregular track 111, the upper side of the chain 13 is stressed, and meanwhile, the side surface of the chain 13 is also stressed by the force generated by the guide rail 11, so that the side surface of the chain 13 is provided with a lubrication-free PTFE high-temperature wear-resisting plate.
The stretching method based on the hollow fiber membrane stretching equipment comprises the following steps:
s1, weaving the fiber membrane raw silk into fiber membrane cloth, and stretching the whole fiber membrane cloth;
s2, feeding the fiber membrane cloth into a stretching device, feeding the fiber membrane cloth into the stretching mechanism 1 through the unwinding mechanism 2, wherein the unwinding speed of the fiber membrane cloth can be adjusted by the unwinding mechanism 2, and the fiber membrane cloth is prevented from being damaged;
s3, coating the technical edges of the fiber membrane cloth into a whole, and coating the technical edges of the fiber membrane cloth into a whole through the technical edge sizing mechanism 5, so that the strength of the fiber membrane cloth is improved, and the problems of thread falling, scattering and the like of the fiber membrane cloth are avoided;
s4, pressing the fiber membrane cloth on the clamping mechanism 12, and pressing and fixing the fiber membrane cloth on the clamping mechanism 12 through the fiber membrane cloth pressing mechanism 7;
s5, stretching the fiber membrane cloth, and performing heat treatment setting simultaneously, wherein the fiber membrane cloth moves leftwards on the guide rail 11 along with the clamping mechanism 12, is stretched in the width direction due to the increase of the distance between the two rails 111, and is subjected to heat treatment setting under the action of the heating oven 4; the space between the tracks 111 of the stretching section 113 is adjusted in a sectional mode, and different stretching speeds can be adjusted according to the specific condition of specific fiber membrane cloth; the heating oven 4 adopts zone heating, so that the temperature can be regulated in zones according to the specific stretching speed and stretching stage, and the stretching efficiency is improved; under the combined action of sectional stretching and zone heating, the fiber film protofilaments are stretched to form holes, and the obtained tissue structure is uniform and high in quality;
s5, peeling the fiber membrane cloth from the clamping mechanism 12, and peeling the fiber membrane cloth from the clamping mechanism 12 through the fiber membrane cloth peeling mechanism 8;
s6, cutting off the technical edge of the stretched fiber membrane cloth, and cutting off the coated technical edge through a technical edge cutting mechanism 6 to obtain a completely stretched fiber membrane;
s7, rolling the stretched fiber membrane cloth, rolling the fiber membrane cloth through the rolling mechanism 3, wherein the rolling speed of the fiber membrane cloth can be adjusted by the rolling mechanism 3, and the fiber membrane cloth is prevented from being damaged.
According to the utility model, the original fiber of the fiber membrane is woven into the fiber membrane cloth, and then the whole fiber membrane cloth is stretched, so that the stretching is uniform and stable, the pore-forming is uniform, the problem that the membrane fiber is easy to damage when being woven after stretching is solved, the membrane forming quality is well ensured, the cost is reduced, and the efficiency is improved.
In the present invention, unless stated to the contrary, use of the directional terms "upper, lower, left, right, top, bottom" generally refer to the orientation as shown in the drawings, or to the orientation of the component itself as being vertical, perpendicular, or gravitational; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (9)
1. The utility model provides a tensile equipment of hollow fiber membrane, is in including drawing mechanism, setting unwinding mechanism, the setting on drawing mechanism right side are in the left winding mechanism of drawing mechanism, its characterized in that:
a heating oven is coated outside the stretching mechanism;
the stretching mechanism comprises a guide rail and a clamping mechanism arranged on the guide rail, and the clamping mechanism moves along the guide rail;
the guide rail comprises two symmetrically arranged rails, the guide rail comprises a stretching section, and the distance between the two rails in the stretching section is gradually increased from right to left.
2. The hollow fiber membrane drawing apparatus according to claim 1, characterized in that: the clamping mechanism is provided with a plurality of fixing needle plates which are installed on the two rails in pairs.
3. The hollow fiber membrane drawing apparatus according to claim 1, characterized in that: the right end of the stretching mechanism is provided with a technical edge sizing mechanism, and the left end of the stretching mechanism is provided with a technical edge cutting mechanism.
4. The hollow fiber membrane drawing apparatus according to claim 3, characterized in that: the drawing mechanism is further provided with a fiber film cloth pressing mechanism and a fiber film cloth stripping mechanism, the fiber film cloth pressing mechanism is arranged on the left side of the process edge sizing mechanism, and the fiber film cloth stripping mechanism is arranged on the right side of the process edge cutting mechanism.
5. The hollow fiber membrane drawing apparatus according to claim 4, characterized in that: the guide rail is close to one section of unwinding mechanism is the material loading section, the guide rail is close to one section of winding mechanism is the unloading section, two the track is in material loading section and unloading section parallel arrangement, two the track is in the interval of material loading section is less than the interval of unloading section, the material loading section with one section of interval change between the unloading section is the tensile section, technology edge thick liquid mechanism with fibre membrane cloth hold-down mechanism fixed mounting is in on the material loading section, technology limit cutting mechanism with fibre membrane cloth peeling means fixed mounting is in on the unloading section.
6. The hollow fiber membrane drawing apparatus according to claim 5, characterized in that: the stretching section comprises at least one stretching section, and the distance between two tracks in each stretching section is gradually increased from right to left.
7. The hollow fiber membrane drawing apparatus according to claim 1, characterized in that: the heating oven comprises at least one subarea, and each subarea is provided with a temperature control device.
8. The hollow fiber membrane drawing apparatus according to claim 1, characterized in that: unwinding mechanism with winding mechanism all is provided with tension detection device.
9. The hollow fiber membrane drawing apparatus according to claim 1, characterized in that: the stretching mechanism further comprises a chain, the chain moves on the guide rail, and the clamping mechanism is fixed on the chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122897187.8U CN216537838U (en) | 2021-11-24 | 2021-11-24 | Hollow fiber membrane stretching equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122897187.8U CN216537838U (en) | 2021-11-24 | 2021-11-24 | Hollow fiber membrane stretching equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216537838U true CN216537838U (en) | 2022-05-17 |
Family
ID=81576771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122897187.8U Expired - Fee Related CN216537838U (en) | 2021-11-24 | 2021-11-24 | Hollow fiber membrane stretching equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216537838U (en) |
-
2021
- 2021-11-24 CN CN202122897187.8U patent/CN216537838U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220517 |