CN220617349U - Coal mine conveying device - Google Patents
Coal mine conveying device Download PDFInfo
- Publication number
- CN220617349U CN220617349U CN202321562777.8U CN202321562777U CN220617349U CN 220617349 U CN220617349 U CN 220617349U CN 202321562777 U CN202321562777 U CN 202321562777U CN 220617349 U CN220617349 U CN 220617349U
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- plate
- feeding hopper
- belt
- fixedly connected
- scraper
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- 239000003245 coal Substances 0.000 title claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 54
- 239000002817 coal dust Substances 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000007790 scraping Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
Colliery conveyer relates to colliery apparatus technical field, including belt conveyor, belt conveyor material loading end top is equipped with swing motion's feeding hopper, and the feeding hopper tip is equipped with the discharge gate, and feeding hopper tip is equipped with the baffle of control discharge gate opening area, and during feeding hopper swing, drive the baffle through fixed establishment and rotate to control discharge gate opening area. The utility model solves the problems that when the coal with larger volume slides down to the conveyor belt along the bottom plate with large gradient during feeding of the hopper of the coal mine conveyor device in the prior art, the impact force is large, the conveyor belt is easy to be damaged, the scraper is easy to be inserted into the conveyor belt to cut the conveyor belt when the discharging end of the belt conveyor mechanism vibrates, the scraper scatters the coal dust cleaned on the surface of the conveyor belt on the ground, the coal dust is carried by the past vehicles and equipment to fly everywhere, and the cleaning and the working environment damage are difficult to be caused.
Description
Technical Field
The utility model relates to the technical field of coal mine tools, in particular to a coal mine conveying device.
Background
The coal mine is a luxuriant plant growing in a certain geological period, is gradually piled up to form a thick layer in a proper geological environment, is buried in water bottom or sediment, is formed by natural coalification in a long geological period, and mainly comprises a belt conveying mechanism used in the processes of coal mining, production, transportation and processing.
The utility model discloses a patent of publication number CN216425713U among the prior art, including the module support, the module support connects gradually, the both ends symmetry of module support is provided with driving shaft and driven shaft, the one end of driving shaft is provided with hydraulic motor, the centre of driving shaft and driven shaft encircles and is provided with the modularization conveying track, the distance is provided with the area flitch on the conveying track, the both sides symmetry of modularization conveying track is provided with the fender material support, the fender material is provided with the striker plate on the fender material support, the both sides of area flitch are provided with the recess, the striker plate is installed in the recess, area flitch and striker plate sliding connection, the upper end of driven shaft is provided with the feeding hopper, the lower extreme of driving shaft is provided with hydraulic jack-up device.
The prior devices, including the above patents, gradually expose the disadvantages of the technology with use, mainly in the following aspects:
first, the loading hopper in the coal mine conveyer adopts the bottom plate that the slope is big, prevents that coal from blockking up at the discharge gate of loading hopper, and impact force is big when the big bottom plate landing of volume along the slope to the conveyer belt, produces the damage to the conveyer belt easily.
Secondly, the scraper on the surface of the cleaning conveyor belt is fixedly arranged at the bottom of the discharging end of the belt conveying mechanism, vibration is easily generated at the discharging end of the belt conveying mechanism, and when the discharging end of the belt conveying mechanism vibrates, the scraper is easily inserted into the conveyor belt to cut the conveyor belt.
Thirdly, the coal dust cleaned by the scraper on the surface of the conveyor belt in the existing coal mine conveying device mainly falls on the ground, and the coal dust is easily carried by the passing vehicles and equipment to fall everywhere, so that the coal dust is not easy to clean and destroy the working environment.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model solves the problems that when the coal mine conveying device in the prior art loads coal with larger volume along the bottom plate with large gradient, impact force is large when the coal slides down to the conveying belt, damage is easily generated to the conveying belt, a scraper is easily inserted into the conveying belt to cut the conveying belt when the discharging end of the belt conveying mechanism vibrates, the scraper scatters coal dust cleaned on the surface of the conveying belt on the ground, and the coal dust is carried by the conventional vehicles and equipment to fly everywhere, so that the coal dust is not easy to clean and damage the working environment.
In order to solve the problems, the utility model provides the following technical scheme:
colliery conveyer, including belt conveyor, belt conveyor material loading end top is equipped with the feeding hopper of swing motion, the feeding hopper tip is equipped with the discharge gate, the feeding hopper tip is equipped with the baffle of control discharge gate opening area, during feeding hopper swing, drive the baffle through fixed establishment and rotate to control discharge gate opening area.
As an optimized scheme, a scraper in friction connection with the lower surface of the conveyor belt is vertically arranged below the belt conveying mechanism in a sliding manner.
As an optimized scheme, a collecting box for collecting pulverized coal cleaned by a scraper is fixedly arranged below the belt conveying mechanism, and a guiding-out mechanism for processing pulverized coal briquettes inside the collecting box is arranged in the collecting box.
As an optimized scheme, the end part of the feeding hopper is provided with a crank-link mechanism for driving the feeding hopper to swing.
As an optimized scheme, a guide plate for guiding cleaned coal dust is fixedly connected to the end part of the scraper, a feed inlet is formed in the top of the collecting box, and the lower end part of the guide plate extends into the feed inlet.
As an optimized scheme, the end part of the collecting box is provided with a pressing plate in friction contact with the inner wall of the collecting box.
As an optimized scheme, the crank connecting rod mechanism comprises a first connecting rod hinged to the bottom of the feeding hopper and fixed in position, the end part of the feeding hopper is hinged to a swinging column, and the swinging end of the swinging column is hinged to a rotating plate.
As an optimized scheme, the fixing mechanism comprises a fixing rod with a fixed position, a swinging plate arranged in a swinging way is inserted into the fixing rod, and the swinging plate is in sliding connection with the baffle plate.
As an optimized scheme, the bottom of the swing plate is fixedly connected with a sliding plate, and the top of the baffle is provided with a sliding groove for restricting the sliding plate to slide.
As an optimized scheme, the two sides of the fixing rod are fixedly connected with first fixing plates, and the first fixing plates are fixedly connected with second supporting plates.
As an optimized scheme, the end part of the collecting box is provided with an outlet, the upper end part of the outlet is hinged with a valve plate for controlling the opening and closing of the outlet, the end part of the valve plate is fixedly connected with a second fixing plate, and the collecting box is inserted with a bolt for fixing the collecting box.
As an optimized scheme, a bracket is arranged at the end part of the collecting box, which is opposite to the valve plate, and a telescopic rod for pushing the pressing plate to horizontally slide is fixedly connected between the pressing plate and the bracket.
As an optimized scheme, the top of the collecting box is vertically and slidably inserted with a second connecting rod, and the bottom of the scraper is fixedly connected with the second connecting rod.
As an optimized scheme, the second connecting rod is sleeved with a compression spring, and two ends of the compression spring are respectively propped against the collecting box and the scraper.
As an optimized scheme, the belt conveying mechanism comprises a conveying belt, a rotating wheel for driving the conveying belt is arranged on the inner side of the conveying belt, transmission shafts for transmitting the rotating wheel are fixedly connected to the two ends of the rotating wheel, the transmission shafts are inserted into a third supporting plate, a second motor base is fixedly connected to the third supporting plate, and a second motor connected with the transmission shafts is fixedly connected to the second motor base.
As an optimized scheme, a first supporting plate is fixedly arranged below the feeding hopper, a first motor is fixedly connected to the upper end of the first supporting plate through a first motor base, a rotary column is fixedly connected to the output end of the first motor, and the rotary column is fixedly connected with the rotary plate.
As an optimized scheme, the bottom of the feeding hopper is fixedly connected with a lantern ring, and the first connecting rod is inserted into the lantern ring, and the two ends of the first connecting rod are fixedly connected with the second supporting plate.
Compared with the prior art, the utility model has the beneficial effects that:
the top of the feeding end of the belt conveying mechanism is provided with a feeding hopper, the feeding hopper realizes reciprocating swinging motion under the cooperation of a crank connecting rod mechanism, the end part of the feeding hopper is provided with a discharge hole and a baffle plate matched with the discharge hole, a fixed rod is fixedly arranged above the baffle plate, a swinging plate which is in sliding connection with the baffle plate is inserted into the fixed rod, the baffle plate realizes reciprocating rotation motion under the cooperation of the fixed rod, the swinging plate and the feeding hopper, when the belt conveying mechanism is fed, the crank connecting rod mechanism drives the feeding hopper to swing, the discharge hole of the feeding hopper is close to the belt conveying mechanism, and simultaneously drives the baffle plate to rotate, the opening area of the discharge hole gradually becomes larger, and the large-size coal in the feeding hopper is slowly discharged to the belt conveying mechanism through the discharge hole, so that the function of preventing the belt conveying mechanism from being damaged due to the fact that the large-size coal directly slides down to the belt conveying mechanism is realized;
the scraper which is in friction contact with the lower surface of the belt is arranged below the belt conveying mechanism, vertical sliding of the scraper is realized under the cooperation of the compression spring and the second connecting rod, and when the blanking end of the belt conveying mechanism vibrates, the scraper can synchronously and vertically slide with the lower surface of the belt, so that the function of preventing the scraper from being inserted into the conveyor belt to cut due to vibration of the blanking end of the belt conveying mechanism is realized;
the scraper tip is equipped with the baffle to scraping the pulverized coal direction, and the baffle bottom is equipped with the collecting box to pulverized coal collection, and the collecting box tip is equipped with the clamp plate to collecting incasement pulverized coal extrusion, and the pulverized coal that the scraper scraped falls to the collecting box through the baffle, starts the telescopic link, and the telescopic link drives the clamp plate and extrudes the pulverized coal in the collecting box into cubic, has realized automatic clearance pulverized coal, protects operational environment's function.
Drawings
In order to more clearly illustrate the embodiments of the present utility model 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. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the feeding hopper of the present utility model;
FIG. 3 is a schematic view of the structure of the collecting box of the present utility model.
In the figure: 1-a belt transport mechanism; 2-feeding a hopper; 3-baffle plates; 4-a discharge hole; 5-scraping knife; 6, collecting box; 7-a guide plate; 8-an outlet; 9-swinging columns; 10-rotating plate; 11-spin columns; 12-fixing rod; 13-swinging plates; 14-a skateboard; 15-a first fixing plate; 16-a second support plate; 17-a first connecting rod; 18-compressing the spring; 19-a second connecting rod; 20-a bracket; 21-a telescopic rod; 22-conveyor belt; 23-rotating wheels; 24-transmission shafts; 25-a second motor; 26-a second motor mount; 27-a third support plate; 28-a first motor; 29-a first motor mount; 30-a first support plate; 31-a feed inlet; 32-pressing plates; 33-a second fixing plate; 34-bolts; 35-sliding grooves; 36-collar; 37-valve plate.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
As shown in fig. 1 to 3, the coal mine conveying device comprises a belt conveying mechanism 1, a feeding hopper 2 in swinging motion is arranged at the top of a feeding end of the belt conveying mechanism 1, a discharge hole 4 is arranged at the end part of the feeding hopper 2, a baffle 3 for controlling the opening area of the discharge hole 4 is arranged at the end part of the feeding hopper 2, and the baffle 3 is driven to rotate through a fixing mechanism when the feeding hopper 2 swings, and the opening area of the discharge hole 4 is controlled.
A scraper 5 which is in friction connection with the lower surface of the conveyor belt 22 is vertically arranged below the belt conveying mechanism 1 in a sliding manner.
The collecting box 6 for collecting the pulverized coal cleaned by the scraper 5 is fixedly arranged below the belt conveying mechanism 1, and a guiding mechanism for processing the pulverized coal briquettes inside the collecting box 6 is arranged in the collecting box 6.
The end part of the feeding hopper 2 is provided with a crank-link mechanism for driving the feeding hopper to swing.
The end part of the scraper 5 is fixedly connected with a guide plate 7 for guiding cleaned pulverized coal, a feed inlet 31 is arranged at the top of the collecting box 6, and the lower end part of the guide plate 7 extends into the feed inlet 31.
The end of the collection box 6 is provided with a pressure plate 32 in frictional contact with its inner wall.
The crank connecting rod mechanism comprises a first connecting rod 17 hinged at the bottom of the upper hopper 2 and fixed in position, the end part of the upper hopper 2 is hinged with a swinging column 9, and the swinging end of the swinging column 9 is hinged with a rotating plate 10.
The fixing mechanism comprises a fixed rod 12 with a fixed position, a swinging plate 13 arranged in a swinging way is inserted into the fixed rod 12, and the swinging plate 13 is in sliding connection with the baffle plate 3.
The bottom of the swinging plate 13 is fixedly connected with a sliding plate 14, and the top of the baffle plate 3 is provided with a sliding groove 35 for restricting the sliding plate 14 to slide.
The two sides of the fixed rod 12 are fixedly connected with a first fixed plate 15, and the first fixed plate 15 is fixedly connected with a second support plate 16.
The end part of the collecting box 6 is provided with an outlet 8, the upper end part of the outlet 8 is hinged with a valve plate 37 for controlling the opening and closing of the outlet, the end part of the valve plate 37 is fixedly connected with a second fixing plate 33, and the collecting box 6 is inserted with a bolt 34 for fixing the collecting box.
The end of the collecting box 6 opposite to the valve plate 37 is provided with a bracket 20, and a telescopic rod 21 for pushing the pressing plate 32 to slide horizontally is fixedly connected between the pressing plate 32 and the bracket 20.
The top of the collecting box 6 is vertically and slidably inserted with a second connecting rod 19, and the bottom of the scraper 5 is fixedly connected with the second connecting rod 19.
The second connecting rod 19 is sleeved with a compression spring 18, and two ends of the compression spring 18 are respectively propped against the collecting box 6 and the scraper 5.
The belt conveying mechanism 1 comprises a conveying belt 22, a rotating wheel 23 for driving the conveying belt 22 is arranged on the inner side of the conveying belt 22, transmission shafts 24 for transmitting the rotating wheel are fixedly connected to two ends of the rotating wheel 23, the transmission shafts 24 are inserted into a third supporting plate 27, a second motor base 26 is fixedly connected to the third supporting plate 27, and a second motor 25 connected with the transmission shafts 24 is fixedly connected to the second motor base 26.
A first supporting plate 30 is fixedly arranged below the feeding hopper 2, a first motor 28 is fixedly connected to the upper end of the first supporting plate 30 through a first motor base 29, a rotary column 11 is fixedly connected to the output end of the first motor 28, and the rotary column 11 is fixedly connected with the rotary plate 10.
The bottom of the feeding hopper 2 is fixedly connected with a collar 36, and the first connecting rod 17 is inserted into the collar 36 and two ends of the first connecting rod are fixedly connected with the second supporting plate 16.
The working principle of the device is as follows:
the top of the feeding end of the belt conveying mechanism 1 is provided with a feeding hopper 2, the feeding hopper 2 realizes reciprocating swinging motion under the cooperation of a crank-link mechanism, the end part of the feeding hopper 2 is provided with a discharge hole 4 and a baffle plate 3 matched with the discharge hole, a fixed rod 12 is fixedly arranged above the baffle plate 3, the fixed rod 12 is inserted with a swinging plate 13 which is in sliding connection with the baffle plate 3, the baffle plate 3 realizes reciprocating rotation motion under the cooperation of the fixed rod 12, the swinging plate 13 and the feeding hopper 2, when the belt conveying mechanism 1 is fed, the crank-link mechanism drives the feeding hopper 2 to swing, the discharge hole 4 of the feeding hopper 2 drives the baffle plate 3 to rotate in the process of being close to the belt conveying mechanism 1, the opening area of the discharge hole 4 gradually becomes larger, and coal with larger volume in the feeding hopper 2 is slowly discharged to the belt conveying mechanism 1 through the discharge hole 4, so that the function of preventing the coal with larger volume from directly sliding to the belt conveying mechanism 1 from damaging a conveyor belt 22 is realized;
the scraper 5 in friction contact with the lower surface of the belt is arranged below the belt conveying mechanism 1, the scraper 5 vertically slides under the cooperation of the compression spring 18 and the second connecting rod 19, and when the blanking end of the belt conveying mechanism 1 vibrates, the scraper 5 can synchronously vertically slide with the lower surface of the belt, so that the function of preventing the scraper 5 from being inserted into the conveying belt 22 to cut the belt due to vibration of the blanking end of the belt conveying mechanism 1 is realized;
the scraper 5 tip is equipped with the baffle 7 to scraping the pulverized coal direction, and the baffle 7 bottom is equipped with the collection box 6 to the pulverized coal collection, and collection box 6 tip is equipped with the clamp plate 32 to the interior pulverized coal extrusion of collection box 6, and the pulverized coal that scraper 5 scraped slides to collection box 6 through baffle 7, starts telescopic link 21, and telescopic link 21 drives clamp plate 32 and extrudees the pulverized coal in the collection box 6 into the cubic, has realized automatic clearance pulverized coal, protects operational environment's function.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (10)
1. Coal mine conveyer, its characterized in that: comprises a belt conveying mechanism (1), a feeding hopper (2) which swings is arranged at the top of the feeding end of the belt conveying mechanism (1), a discharging hole (4) is arranged at the end part of the feeding hopper (2), a baffle (3) for controlling the opening area of the discharging hole (4) is arranged at the end part of the feeding hopper (2), the baffle (3) is driven to rotate by a fixing mechanism when the feeding hopper (2) swings, and the opening area of the discharging hole (4) is controlled,
a scraper (5) which is in friction connection with the lower surface of the conveyor belt (22) is vertically arranged below the belt conveying mechanism (1) in a sliding manner,
the coal dust collecting device is characterized in that a collecting box (6) for collecting coal dust cleaned by the scraper (5) is fixedly arranged below the belt conveying mechanism (1), and a guiding-out mechanism for processing the coal dust briquettes inside the collecting box (6) is arranged in the collecting box.
2. The coal mine transportation device of claim 1, wherein: the utility model discloses a feeding hopper, including feeding hopper (2), including material loading hopper (2), feeding hopper (2) tip is equipped with the crank link mechanism that drives its swing, crank link mechanism is including articulating in feeding hopper (2) bottom and fixed in position's head rod (17), feeding hopper (2) tip articulates there is swing post (9), swing post (9) swing end articulates there is rotor plate (10), feeding hopper (2) bottom rigid coupling has lantern ring (36), head rod (17) cartridge is in lantern ring (36) and both ends and second backup pad (16) fixed connection.
3. The coal mine transportation device of claim 2, wherein: the end part of the scraper (5) is fixedly connected with a guide plate (7) for guiding cleaned coal dust, a feed inlet (31) is formed in the top of the collecting box (6), and the lower end part of the guide plate (7) extends into the feed inlet (31).
4. A coal mine transportation apparatus as claimed in claim 3 wherein: the end part of the collecting box (6) is provided with a pressing plate (32) in friction contact with the inner wall of the collecting box.
5. The coal mine transportation device of claim 4, wherein: the fixing mechanism comprises a fixing rod (12) with a fixed position, a swinging plate (13) arranged in a swinging mode is inserted into the fixing rod (12), and the swinging plate (13) is in sliding connection with the baffle plate (3).
6. The coal mine transportation device of claim 5, wherein: the bottom of the swinging plate (13) is fixedly connected with a sliding plate (14), and the top of the baffle (3) is provided with a chute (35) for restricting the sliding plate (14) to slide.
7. The coal mine transportation device of claim 6, wherein: the two sides of the fixed rod (12) are fixedly connected with a first fixed plate (15), and the first fixed plate (15) is fixedly connected with a second support plate (16).
8. The coal mine transportation device of claim 7, wherein: the collecting box (6) tip is equipped with export (8), and export (8) upper end articulates there is valve plate (37) of its switching of control, the tip that collecting box (6) and valve plate (37) are relative is equipped with support (20), and rigid coupling has telescopic link (21) that promote clamp plate (32) horizontal slip between clamp plate (32) and support (20).
9. The coal mine transportation device of claim 8, wherein: the utility model discloses a scraper, including collection box (6), scraper (5), collecting box (6), second connecting rod (19) are inserted in vertical slip in top, scraper (5) bottom and second connecting rod (19) fixed connection, the cover is equipped with compression spring (18) on second connecting rod (19), compression spring (18) both ends offset with collection box (6) and scraper (5) respectively.
10. The coal mine transportation device of claim 9, wherein: the belt conveying mechanism (1) comprises a conveying belt (22), a rotating wheel (23) for driving the conveying belt is arranged on the inner side of the conveying belt (22), a transmission shaft (24) for driving the rotating wheel is fixedly connected to two ends of the rotating wheel (23), the transmission shaft (24) is inserted into a third supporting plate (27), the third supporting plate (27) is fixedly connected with a second motor base (26), the second motor base (26) is fixedly connected with a second motor (25) connected with the transmission shaft (24), a first supporting plate (30) is fixedly arranged below the feeding hopper (2), a first motor (28) is fixedly connected to the upper end of the first supporting plate (30) through a first motor base (29), a rotating column (11) is fixedly connected to the output end of the first motor (28), and the rotating column (11) is fixedly connected with the rotating plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321562777.8U CN220617349U (en) | 2023-06-19 | 2023-06-19 | Coal mine conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321562777.8U CN220617349U (en) | 2023-06-19 | 2023-06-19 | Coal mine conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220617349U true CN220617349U (en) | 2024-03-19 |
Family
ID=90219371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321562777.8U Active CN220617349U (en) | 2023-06-19 | 2023-06-19 | Coal mine conveying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220617349U (en) |
-
2023
- 2023-06-19 CN CN202321562777.8U patent/CN220617349U/en active Active
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