CN220541652U - Abrasive cloth drying device and abrasive cloth production system - Google Patents
Abrasive cloth drying device and abrasive cloth production system Download PDFInfo
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- CN220541652U CN220541652U CN202322137638.7U CN202322137638U CN220541652U CN 220541652 U CN220541652 U CN 220541652U CN 202322137638 U CN202322137638 U CN 202322137638U CN 220541652 U CN220541652 U CN 220541652U
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- rod
- airing
- abrasive cloth
- drying chamber
- drying
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- 238000001035 drying Methods 0.000 title claims abstract description 104
- 239000004744 fabric Substances 0.000 title claims abstract description 83
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 117
- 239000004576 sand Substances 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000005570 vertical transmission Effects 0.000 claims description 5
- 238000010981 drying operation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model relates to a abrasive cloth drying device, which comprises a drying chamber, wherein an upper airing rod conveying mechanism, a lower rod returning mechanism, a rod supplying mechanism, a rod discharging mechanism and a plurality of airing rods are arranged in the drying chamber; the rod supplying mechanism is arranged on the abrasive cloth feeding side of the drying chamber and connected with the inlet end of the upper rod airing and conveying mechanism and the outlet end of the lower rod returning mechanism, the lower rod mechanism is arranged on the abrasive cloth discharging side of the drying chamber and connected with the outlet end of the upper rod airing and conveying mechanism and the inlet end of the lower rod returning mechanism, so that a rod airing circulation channel is formed in the drying chamber, and all the rods are sequentially circulated on the rod airing circulation channel. In addition, the utility model also relates to a sand cloth production system adopting the sand cloth drying device. According to the utility model, the abrasive cloth is driven to move forwards through the circulation of the airing rods, and each airing rod can be hung with the abrasive cloth with a certain length, so that the length of the abrasive cloth in the drying chamber can be greatly increased, and the drying efficiency is improved; the airing rod can circulate circularly, so that the continuity of the drying operation is ensured.
Description
Technical Field
The utility model belongs to the technical field of abrasive cloth production, and relates to an abrasive cloth drying device and an abrasive cloth production system adopting the same.
Background
The abrasive cloth is mainly used for polishing rust, paint or burrs on the surface of a metal workpiece, polishing the surface and the like. The abrasive cloth is formed by uniformly adhering abrasive materials to a solid base cloth through a bonding agent, and generally, the base cloth is glued and then subjected to sand planting operation, and then needs to be dried. At present, the tensioning roller is mainly used for enabling the tensioned abrasive cloth to pass through a drying room at a constant speed, high-temperature air is sprayed on one side or two sides of the abrasive cloth, the purpose of drying the abrasive cloth is achieved, and the problems of low drying efficiency, high energy consumption and the like exist in the mode. Chinese patent CN214892405U discloses a drying hanger for producing abrasive cloth, which arranges a plurality of cloth hanging rods on a sliding rail, each cloth hanging rod slides on the sliding rail, and abrasive cloth is wound on each cloth hanging rod and hangs down from between adjacent cloth hanging rods, although this mode can increase the length of abrasive cloth passing through a drying room once, the scheme has many drawbacks, such as that continuous abrasive cloth is difficult to wind on each cloth hanging rod in turn, the cloth hanging rods cannot run continuously, and only abrasive cloth drying can be performed in batches and in batches.
Disclosure of Invention
The utility model relates to a sand cloth drying device and a sand cloth production system adopting the sand cloth drying device, which at least can solve part of defects in the prior art.
The utility model relates to a abrasive cloth drying device, which comprises a drying chamber, wherein an upper airing rod conveying mechanism, a lower rod returning mechanism, a rod supplying mechanism, a rod discharging mechanism and a plurality of airing rods are arranged in the drying chamber; the rod supplying mechanism is arranged on the abrasive cloth feeding side of the drying chamber and is connected with the inlet end of the upper rod airing and conveying mechanism and the outlet end of the lower rod returning mechanism, the lower rod mechanism is arranged on the abrasive cloth discharging side of the drying chamber and is connected with the outlet end of the upper rod airing and conveying mechanism and the inlet end of the lower rod returning mechanism, so that a rod airing circulation channel is formed in the drying chamber, and all the rods are sequentially circulated on the rod airing circulation channel.
As one of the embodiments, the rod supplying mechanism comprises a rod taking unit for receiving the airing rods from the lower rod returning mechanism and a rod delivering unit for transferring the airing rods from the rod taking unit to the upper rod conveying mechanism.
As one of the implementation manners, the airing rod connecting unit comprises a first sprocket mechanism, the first sprocket mechanism comprises a first transmission chain and a plurality of first transmission sprockets, a plurality of first rod taking hooks are arranged on the first transmission chain, and one of the first transmission sprockets is an output sprocket arranged at the inlet of the upper airing rod conveying mechanism.
As one of the implementation modes, the output sprocket comprises a wheel seat and a wheel body rotatably mounted on the wheel seat through a wheel shaft, a containing groove is formed in the top end of the wheel seat, a supporting rod is arranged in the containing groove, the axis of the supporting rod is parallel to the axis of the wheel body, and the top end of the supporting rod protrudes out of the containing groove and is higher than the top end of the wheel body.
As one of implementation modes, the wheel seat is provided with two accommodating grooves, the two accommodating grooves are respectively provided with a supporting rod, and the two accommodating grooves are symmetrically arranged relative to a vertical reference plane passing through the axis of the wheel body.
As one of the implementation modes, the rod taking unit comprises a second sprocket mechanism with a vertical transmission direction, the second sprocket mechanism comprises a second transmission chain and a plurality of second transmission sprockets which are sequentially distributed along the vertical direction, and a plurality of second rod taking hooks are arranged on the second transmission chain; the first sprocket mechanism includes a vertical transfer section disposed adjacent to the second sprocket mechanism, and a transfer speed of the first sprocket mechanism is greater than a transfer speed of the second sprocket mechanism.
As one of implementation modes, the bottom of the drying chamber is provided with an air inlet duct, the top of the drying chamber is provided with an air return duct, the drying chamber is connected with an air draft mechanism, and the air return duct is connected with the air draft mechanism through the air return duct.
The utility model also relates to a sand cloth production system which comprises an uncoiler, a sizing machine, a sand planting machine and a drying device, wherein the drying device adopts the sand cloth drying device.
The utility model has at least the following beneficial effects:
according to the utility model, the abrasive cloth is driven to move forwards through the circulation of the airing rods, and each airing rod can be hung with the abrasive cloth with a certain length, so that the length of the abrasive cloth in the drying chamber can be greatly increased, and the drying efficiency is improved; the airing rod can circulate circularly, so that the continuity of the drying operation is ensured.
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 diagram of a abrasive cloth drying device according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the cooperation of the output sprocket and the upper airing rod conveying mechanism according to the embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a abrasive cloth production system according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely, and it is apparent that the described embodiments 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.
Example 1
As shown in fig. 1, an embodiment of the present utility model provides a abrasive cloth drying apparatus 100, which includes a drying chamber 101, wherein an upper drying rod conveying mechanism 102, a lower rod returning mechanism 103, a rod supplying mechanism 104, a rod lowering mechanism 105 and a plurality of drying rods 110 are arranged in the drying chamber 101; the rod supplying mechanism 104 is arranged on the abrasive cloth feeding side of the drying chamber 101 and connects the inlet end of the upper rod conveying mechanism 102 with the outlet end of the lower rod returning mechanism 103, the lower rod mechanism 105 is arranged on the abrasive cloth discharging side of the drying chamber 101 and connects the outlet end of the upper rod conveying mechanism 102 with the inlet end of the lower rod returning mechanism 103, so that a rod circulating channel is formed in the drying chamber 101, and each rod 110 is sequentially circulated on the rod circulating channel.
The drying chamber 101 is generally rectangular and has a length direction identical to the running direction of the abrasive cloth. Preferably, the drying chamber 101 comprises an inlet section, a drying section and an outlet section, the above-mentioned rod feeding mechanism 104 being arranged in the inlet section, the lower rod mechanism 105 being arranged in the outlet section, and the upper rod conveying mechanism 102 being arranged in the drying section.
In one embodiment, as shown in fig. 1, an air inlet duct 106 is provided at the bottom of the drying chamber 101 for supplying hot air into the drying chamber 101; in the case where the drying chamber 101 includes an inlet section, a drying section, and an outlet section, it is preferable that the air inlet duct 106 is disposed in the drying section, and the drying section performs a main drying operation, and the inlet section and the outlet section also have hot air therein, thereby performing an auxiliary drying function. Preferably, the air inlet duct 106 is arranged along the whole length of the length direction of the drying section (can be slightly smaller than the length of the drying section), the air inlet duct 106 adopts a structure with gradually narrowed middle wide two sides along the length direction of the drying section, and the abrasive cloth sequentially passes through pre-drying in the inlet section and slow drying-strong drying-slow drying in the drying section, so that a better abrasive cloth drying effect can be obtained, and the conditions of abrasive cloth stress concentration and the like are avoided.
Further, as shown in fig. 1, the heat insulation layer 1061 is disposed at the bottom of the air inlet duct 106, so as to reduce unnecessary temperature loss.
Further, the drying chamber 101 is connected with an air exhausting mechanism, and the air exhausting mechanism is preferably arranged on the inlet section, so that hot air in the drying chamber 101 and abrasive cloth can flow reversely, and the heat exchange drying effect is improved.
In one embodiment, as shown in fig. 1, a return air duct 107 is disposed at the top of the drying chamber 101, and the return air duct 107 is connected with the air suction mechanism through a return air duct, so that the extracted hot air is at least partially returned into the drying chamber 101, thereby significantly saving energy consumption; in particular, by virtue of this return air, the circulation of hot air in the drying chamber 101 can be improved, so that the hot air can reach both sides of the abrasive cloth relatively uniformly.
In one embodiment, the air exhausting mechanism includes an air exhausting drum 108, the air exhausting drum 108 is connected with the drying chamber 101 and the air exhausting power equipment through an air exhausting pipe, wherein the air exhausting drum 108 is preferably rotatably installed on a related foundation and is provided with an air exhausting drum rotation driving unit for driving the air exhausting drum 108 to rotate around an axis of the air exhausting drum, for example, an installation seat is arranged on the outer wall of the drying chamber 101, the air exhausting drum 108 is rotatably installed on the installation seat through a bracket, and the air exhausting drum rotation driving unit can also be arranged on the installation seat and can adopt a driving mode such as a motor and a transmission structure; the suction duct 108 is preferably connected to suction ducts on both sides by means of rotary joints. The abrasive cloth enters the drying chamber 101 after passing through the exhaust drum 108, so that the exhaust drum 108 can perform the function of conveying the abrasive cloth while completing the exhaust operation, equipment such as an abrasive cloth conveying roller and the like can be saved, and particularly, the abrasive cloth can be preheated by hot air flowing through the exhaust drum 108, so that the drying efficiency and effect of the abrasive cloth are improved.
As shown in fig. 1, preferably, a transition roller 109 is further arranged in the inlet section, the transition roller 109 is positioned between the air suction drum 108 and the upper airing rod conveying mechanism 102, and the abrasive cloth is conveyed through the air suction drum 108, the transition roller 109 and the upper airing rod conveying mechanism 102 in sequence; the transition roller 109 is located at a position lower than the suction drum 108, so that a larger wrap angle of the abrasive cloth on the suction drum 108 can be ensured, and the preheating effect of the abrasive cloth is ensured.
The upper airing rod conveying mechanism 102 and the lower return rod mechanism 103 can adopt chain conveying mechanisms, wherein the conveying direction of the upper airing rod conveying mechanism 102 is the same as the running direction of the abrasive cloth, and the upper airing rod conveying mechanism is used for conveying the abrasive cloth from the inlet to the outlet of the drying chamber 101; the conveying direction of the lower rod returning mechanism 103 is opposite to the running direction of the abrasive cloth, and the lower rod returning mechanism is used for conveying the airing rod 110 from the lower rod mechanism 105 to the rod supplying mechanism 104.
In one embodiment, as shown in fig. 1, the pole feed mechanism 104 includes a pole take-off unit for receiving the poles 110 from the lower return pole mechanism 103 and a pole interface unit for transferring the poles 110 from the pole take-off unit to the upper pole transport mechanism 102.
Preferably, the airing rod delivering unit comprises a first sprocket mechanism 1041, the first sprocket mechanism 1041 comprises a first transmission chain and a plurality of first transmission sprockets, the first transmission chain is provided with a plurality of first rod taking hooks, and one of the first transmission sprockets is an output sprocket 10411 arranged at the inlet of the upper airing rod conveying mechanism 102.
In the embodiment shown in fig. 1, the first sprocket mechanism 1041 comprises 3 first drive sprockets, one of which is an output sprocket 10411, and two of which are disposed adjacent to the rod picking unit for completing the grabbing operation of the drying poles 110 from the rod picking unit; preferably, the two first drive sprockets disposed adjacent the rod retrieving unit are disposed one above the other to form a vertical transfer section 10412 disposed adjacent the rod retrieving unit.
For the distribution of the first rod taking hooks, a plurality of first hook groups are sequentially distributed along the length direction of the first transmission chain, and each first hook group comprises a plurality of first rod taking hooks sequentially arranged along the width direction of the chain.
As will be readily appreciated, the airing bar 110 has a certain length, and thus, two or more sets of the first sprocket mechanisms 1041 are arranged along the width direction of the drying chamber 101, and the lifting of the airing bar 110 is commonly accomplished by means of each of the first sprocket mechanisms 1041.
Preferably, as shown in fig. 1, the rod taking unit includes a second sprocket mechanism 1042 with a vertical transmission direction, the second sprocket mechanism 1042 includes a second transmission chain and a plurality of second transmission sprockets sequentially arranged along the vertical direction, and a plurality of second rod taking hooks are disposed on the second transmission chain. The second driving chain wheels are preferably arranged in two, and the two second driving chain wheels are arranged in a vertically opposite mode.
For the distribution of the second rod taking hooks, a plurality of second hook groups are sequentially distributed along the length direction of the second transmission chain, and each second hook group comprises a plurality of second rod taking hooks sequentially arranged along the width direction of the chain.
The bottom of the second sprocket mechanism 1042 is lower than the conveying plane of the lower rod returning mechanism 103, so that the second rod taking hook can hook the airing rod 110 on the lower rod returning mechanism 103 when the second transmission chain rotates.
Similarly, two or more sets of second sprocket mechanisms 1042 are arranged along the width direction of the drying chamber 101, and the lifting of the drying bars 110 is completed by means of each second sprocket mechanism 1042.
As described above, the first sprocket mechanism 1041 includes a vertical transmission section 10412 disposed adjacent to the second sprocket mechanism 1042, the bottom of the vertical transmission section 10412 being higher than the bottom of the second sprocket mechanism 1042; the transmission speed of the first sprocket mechanism 1041 is greater than that of the second sprocket mechanism 1042, so that the first rod-taking hook can hook the airing rod 110 on the second sprocket mechanism 1042.
The structure of the lower rod mechanism 105 may be referred to as the structure of the second sprocket mechanism 1042, which will not be described herein.
In one embodiment, as shown in fig. 2, the output sprocket 10411 includes a wheel seat and a wheel body rotatably mounted on the wheel seat through a wheel shaft, a receiving slot is formed at a top end of the wheel seat, a supporting rod 10413 is disposed in the receiving slot, an axis of the supporting rod 10413 is parallel to an axis of the wheel body, and a top end of the supporting rod 10413 protrudes out of the receiving slot and is higher than a top end of the wheel body. Based on this design, accomplish the linking between first sprocket mechanism 1041 and the upper portion pole conveying mechanism 102 through the die-pin 10413, can smoothly with the pole 110 that dries in the air on the first drive chain handing over to upper portion pole conveying mechanism 102 on, avoid the pole 110 card to block between first sprocket mechanism 1041 and upper portion pole conveying mechanism 102, simultaneously, through the lifting effect of die-pin 10413 to pole 110, also be convenient for the separation between pole 110 and the first pole hook of getting.
The top end of the supporting rod 10413 is preferably slightly higher than the conveying surface of the upper drying rod conveying mechanism 102, so that the drying rod 110 can slide from the supporting rod 10413 to the upper drying rod conveying mechanism 102 conveniently.
Preferably, as shown in fig. 2, the wheel seat is provided with two accommodating grooves, and the two accommodating grooves are respectively provided with a supporting rod 10413, and the two accommodating grooves are symmetrically arranged relative to a vertical reference plane passing through the axis of the wheel body, so that the movement of the airing rod 110 can be smoother.
Example two
Referring to fig. 3, an embodiment of the present utility model provides a system for producing abrasive cloth, which includes an uncoiler 1, a sizing machine 3, a sand planting machine 4 and a drying device 5, wherein the drying device 5 adopts the abrasive cloth drying device 100 provided in the first embodiment.
In one of the embodiments, supplied to the unwinder 1 is a raw cloth, and between the unwinder 1 and the gumming machine 3 there are provided a back priming device 21 and a front priming device 22.
A brand machine 23 is further arranged between the unwinder 1 and the gumming machine 3.
Further preferably, as shown in fig. 3, the above abrasive cloth production system further includes a laminating machine 6 and a laminating drying unit 7, where the laminating machine 6 is used for applying a layer of adhesive on the basis of the existing layered structure of the abrasive cloth; the adhesive coating and drying unit 7 may also adopt the abrasive cloth drying apparatus 100 provided in the first embodiment.
A winder 8 may be disposed at the outlet side of the laminating drying unit 7.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (8)
1. The utility model provides a abrasive cloth drying device, includes drying chamber, its characterized in that: an upper airing rod conveying mechanism, a lower rod returning mechanism, a rod supplying mechanism, a rod discharging mechanism and a plurality of airing rods are arranged in the drying chamber; the rod supplying mechanism is arranged on the abrasive cloth feeding side of the drying chamber and is connected with the inlet end of the upper rod airing and conveying mechanism and the outlet end of the lower rod returning mechanism, the lower rod mechanism is arranged on the abrasive cloth discharging side of the drying chamber and is connected with the outlet end of the upper rod airing and conveying mechanism and the inlet end of the lower rod returning mechanism, so that a rod airing circulation channel is formed in the drying chamber, and all the rods are sequentially circulated on the rod airing circulation channel.
2. The abrasive cloth drying apparatus of claim 1, wherein: the rod supplying mechanism comprises a rod taking unit for receiving the airing rods from the lower rod returning mechanism and a rod connecting unit for transferring the airing rods from the rod taking unit to the upper rod conveying mechanism.
3. The abrasive cloth drying apparatus of claim 2, wherein: the airing rod handing-over unit comprises a first sprocket mechanism, the first sprocket mechanism comprises a first transmission chain and a plurality of first transmission sprockets, a plurality of first rod taking hooks are arranged on the first transmission chain, and one of the first transmission sprockets is an output sprocket arranged at the inlet of the upper airing rod conveying mechanism.
4. A cloth drying apparatus as claimed in claim 3, wherein: the output sprocket comprises a wheel seat and a wheel body which is rotatably arranged on the wheel seat through a wheel shaft, a containing groove is formed in the top end of the wheel seat, a supporting rod is arranged in the containing groove, the axis of the supporting rod is parallel to the axis of the wheel body, and the top end of the supporting rod protrudes out of the containing groove and is higher than the top end of the wheel body.
5. The abrasive cloth drying apparatus of claim 4, wherein: the wheel seat is provided with two accommodating grooves, the two accommodating grooves are respectively provided with a supporting rod, and the two accommodating grooves are symmetrically arranged relative to a vertical reference plane passing through the axis of the wheel body.
6. A cloth drying apparatus as claimed in claim 3, wherein: the rod taking unit comprises a second sprocket mechanism with a vertical transmission direction, the second sprocket mechanism comprises a second transmission chain and a plurality of second transmission sprockets which are sequentially distributed along the vertical direction, and a plurality of second rod taking hooks are arranged on the second transmission chain; the first sprocket mechanism includes a vertical transfer section disposed adjacent to the second sprocket mechanism, and a transfer speed of the first sprocket mechanism is greater than a transfer speed of the second sprocket mechanism.
7. The abrasive cloth drying apparatus of claim 1, wherein: the bottom of drying chamber is equipped with the air inlet duct, the top of drying chamber is equipped with the return air duct, the drying chamber is connected with exhaust mechanism, the return air duct pass through the return air duct with exhaust mechanism connects.
8. The utility model provides an abrasive cloth production system, includes decoiler, rubberizing machine, plants sand machine and drying device, its characterized in that: the drying apparatus employs the abrasive cloth drying apparatus according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322137638.7U CN220541652U (en) | 2023-08-08 | 2023-08-08 | Abrasive cloth drying device and abrasive cloth production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322137638.7U CN220541652U (en) | 2023-08-08 | 2023-08-08 | Abrasive cloth drying device and abrasive cloth production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220541652U true CN220541652U (en) | 2024-02-27 |
Family
ID=89960745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322137638.7U Active CN220541652U (en) | 2023-08-08 | 2023-08-08 | Abrasive cloth drying device and abrasive cloth production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220541652U (en) |
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2023
- 2023-08-08 CN CN202322137638.7U patent/CN220541652U/en active Active
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