CN217462189U - Two lining automatic spray maintenance platform trucks - Google Patents
Two lining automatic spray maintenance platform trucks Download PDFInfo
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- CN217462189U CN217462189U CN202221435535.8U CN202221435535U CN217462189U CN 217462189 U CN217462189 U CN 217462189U CN 202221435535 U CN202221435535 U CN 202221435535U CN 217462189 U CN217462189 U CN 217462189U
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- trolley body
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model provides a two lining automatic spray maintenance platform trucks relates to two lining construction technical field. The trolley comprises a trolley body, wherein the trolley body is formed by connecting a plurality of supports, a toothed chain slideway is arranged at the top of the trolley body along the length direction of the trolley body, travel switches are arranged at two ends of the toothed chain slideway, a walking motor is arranged between the two travel switches on the toothed chain slideway, teeth matched with the toothed chain slideway are arranged at the bottom of the walking motor, the top of the walking motor is fixedly connected with a spray pipe through a support rod, the spray pipe is in an arc shape matched with the profiles of the two liners, and a plurality of mist spray heads are uniformly arranged at intervals on the outer side of the spray pipe; an electric cabinet is arranged on the trolley body, and the travel switch and the traveling motor are respectively electrically connected with the electric cabinet. This application can the automatic control shower move back and forth, carries out the persistence to two linings in the tunnel and comes and goes the maintenance of spraying, sprays the maintenance to the concrete of two linings in the tunnel through a plurality of vaporific shower heads, and work efficiency is high, and can not cause concrete surface damage.
Description
Technical Field
The utility model relates to a two line construction technical field particularly, relate to a two line automatic spray maintenance platform trucks.
Background
With the continuous development of high-speed rail technology in China, the requirement on the infrastructure is higher and higher, and particularly, new requirements are put forward for tunnel construction. Because of the wind tunnel effect when the high-speed train passes through the tunnel, the two-lining concrete in the tunnel can be subjected to huge pressure, the quality of the two-lining concrete becomes more important in order to ensure the running safety of the train, and the maintenance of the concrete is just one of the key factors of the quality of the concrete, particularly the temperature in the tunnel of a long tunnel is high, air is dry, water in the concrete is easy to lose, the shrinkage deformation is large, shrinkage cracks are generated, and the strength and the durability of the concrete are greatly influenced. Generally, it is required to perform curing for 7 days or more after casting concrete for 12 hours. In other structures, a covering and curing mode is generally adopted, but the tunnel covering is difficult, so a direct curing mode is adopted in curing, if the secondary tunnel lining is not cured in time, the hydration heat reaction of concrete cannot be carried out, the strength of the concrete cannot meet the design strength requirement in time, cracks are easily generated on the surface, and the durability and the use function of the concrete are directly influenced. In addition, when the temperature of the water for maintenance is too low, the temperature difference between the inside and the outside of the concrete is easily too large, irregular visible cracks or invisible cracks are easily generated, and the influence on the appearance and the strength of the concrete is large.
At present, generally adopt the high-pressure squirt to carry out the maintenance on two linings in tunnel, but the effect is extremely poor, causes serious damage to the concrete surface, and maintenance rivers through high-pressure squirt spun can flow to the inverted arch face along vault and side wall, and the water source is extravagant more serious to produce the influence to site operation environment.
In view of the deficiencies of the prior art, it would be desirable to provide a two-lined automatic spray maintenance cart that addresses the problems set forth above in the background of the invention.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a two lining automatic spray maintenance platform trucks, it can be to the weak point among the prior art, proposes the solution, can last the maintenance to two lining concrete in tunnel, and the automatic water economy resource that comes and goes sprays.
An embodiment of the utility model provides a two lining automatic spray maintenance platform trucks:
the trolley comprises a trolley body, wherein the trolley body is formed by connecting a plurality of supports, a toothed chain slideway is arranged at the top of the trolley body along the length direction of the trolley body, travel switches are arranged at two ends of the toothed chain slideway, a traveling motor is arranged between the two travel switches on the toothed chain slideway, teeth matched with the toothed chain slideway are arranged at the bottom of the traveling motor, the top of the traveling motor is fixedly connected with a spray pipe through a support rod, the spray pipe is arc-shaped and matched with the profiles of two liners, and a plurality of vaporific spray heads are uniformly arranged at intervals on the outer side of the spray pipe; the trolley body is provided with an electric cabinet, and the travel switch and the traveling motor are respectively electrically connected with the electric cabinet.
In some embodiments of the present invention, a timing switch is disposed in the electric cabinet, and the timing switch is connected to the walking motor.
The utility model discloses an in some embodiments, be equipped with the liquid reserve tank on the platform truck body, be equipped with maintenance liquid in the liquid reserve tank, the liquid reserve tank through first conveyer pipe with the shower intercommunication, be equipped with the water pump on the first conveyer pipe, the water pump with the electric cabinet is connected.
The utility model discloses an in some embodiments, the frame construction that the platform truck body formed for many leg joint, the platform truck body includes main mast frame, cantilever beam and bracing.
In some embodiments of the present invention, the main gantry, the cantilever beam and the diagonal brace are all formed by welding h-shaped steel.
The utility model discloses an in some embodiments, cantilever beam extends to both sides, install the maintenance platform that the baffle formed two symmetries on the cantilever beam.
In some embodiments of the present invention, the shower pipe is made of a steel pipe with high rigidity.
In some embodiments of the present invention, the spraying pipe is provided with a temperature sensor and a humidity sensor, and the temperature sensor and the humidity sensor are respectively connected to the electric cabinet.
In some embodiments of the present invention, a dust concentration sensor is further disposed on the spray pipe, and the dust concentration sensor is connected to the electric cabinet; the trolley body is also provided with a dust removal device, and the dust removal device is connected with the liquid storage tank through a second conveying pipe.
In some embodiments of the present invention, the bottom of the trolley body is provided with rollers.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least:
the utility model discloses a trolley body, the trolley body is formed by many spinal branchs framves connection, the top of trolley body is equipped with the tooth chain slide along its length direction, the both ends of tooth chain slide are equipped with travel switch, lie in two on the tooth chain slide be equipped with the walking motor between the travel switch, the bottom of walking motor have with the tooth of tooth chain slide looks adaptation, the top of walking motor is through bracing piece fixed connection shower, the shower is the arc with two lining profile assorted, the outside interval of shower evenly is equipped with a plurality of vaporific shower heads; the trolley body is provided with an electric cabinet, and the travel switch and the traveling motor are electrically connected with the electric cabinet respectively. The trolley body is provided with the toothed chain slideway, the toothed chain slide is provided with the traveling motor, the spray pipe is arranged on the traveling motor, the traveling motor is controlled by the electric cabinet to move on the toothed chain slideway, so that the spray pipe is driven to move back and forth, the concrete is sprayed and maintained through the mist spray head, the travel switch is triggered to automatically move in the reverse direction when the spray pipe moves to the end part of the toothed chain slideway, and the reciprocating movement of the maintenance spray pipe is realized through the travel switch; the utility model discloses a two lining automatic spray maintenance platform trucks can the automatic control shower move back and forth, carry out the persistence to two linings in the tunnel and come and go the maintenance of spraying, spray the maintenance to the concrete of two linings in the tunnel through a plurality of vaporific shower heads, work efficiency is high, and can not cause concrete surface damage, the removal between walking motor and the tooth chain slide is more nimble, be difficult for producing phenomenons such as card dun, vaporific shower head makes the maintenance liquid spray more evenly, can not cause the wasting of resources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a front view of a two-lined automatic spray maintenance cart according to an embodiment of the present invention;
FIG. 2 is a partial side view of a two-lined automatic spray maintenance cart according to an embodiment of the present invention;
FIG. 3 is an overall side view of a two-lined automatic spray maintenance cart according to an embodiment of the present invention;
fig. 4 is a front view of a two-lined automatic spray maintenance cart according to another embodiment of the present invention.
Reference numerals: 1. a trolley body; 100. a main gantry; 110. a cantilever beam; 120. bracing; 2. a toothed chain slideway; 3. a travel switch; 4. a traveling motor; 5. a shower pipe; 6. a mist spray header; 7. an electric cabinet; 8. a liquid storage tank; 9. a temperature sensor; 10. a humidity sensor; 11. a dust concentration sensor; 12. a dust removal device; 13. a first delivery pipe; 14. a second delivery pipe; 15. a support bar; 16. and a roller.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Examples
Referring to fig. 1-4, fig. 1 is a front view of a two-lined automatic spray maintenance trolley according to an embodiment of the present invention;
FIG. 2 is a partial side view of a two-lined automatic spray maintenance cart according to an embodiment of the present invention;
FIG. 3 is an overall side view of a two-lined automatic spray maintenance cart according to an embodiment of the present invention;
FIG. 4 is a front view of a two-lined automatic spray maintenance cart according to another embodiment of the present invention;
the method specifically comprises the following steps: the trolley comprises a trolley body 1, wherein the trolley body 1 is formed by connecting a plurality of supports, a toothed chain slideway 2 is arranged at the top of the trolley body 1 along the length direction of the trolley body, travel switches 3 are arranged at two ends of the toothed chain slideway 2, a walking motor 4 is arranged between the two travel switches 3 on the toothed chain slideway 2, teeth matched with the toothed chain slideway 2 are arranged at the bottom of the walking motor 4, the top of the walking motor 4 is fixedly connected with a spray pipe 5 through a support rod 15, the spray pipe 5 is arc-shaped and matched with the profiles of two liners, and a plurality of mist spray heads 6 are uniformly arranged at intervals outside the spray pipe 5; an electric cabinet 7 is arranged on the trolley body 1, and the travel switch 3 and the traveling motor 4 are respectively electrically connected with the electric cabinet 7.
The utility model discloses a platform truck body 1, platform truck body 1 is formed by many leg joints, the top of platform truck body 1 is equipped with tooth chain slide 2 along its length direction, the both ends of tooth chain slide 2 are equipped with travel switch 3, it is equipped with walking motor 4 to lie in between two travel switch 3 on the tooth chain slide 2, the bottom of walking motor 4 has the tooth with tooth chain slide 2 looks adaptation, the top of walking motor 4 is through bracing piece 15 fixed connection shower 5, shower 5 is the arc with two lining profile phase-matchs, the outside interval of shower 5 evenly is equipped with a plurality of vaporific shower heads 6; an electric cabinet 7 is arranged on the trolley body 1, and the travel switch 3 and the traveling motor 4 are respectively electrically connected with the electric cabinet 7. The trolley body 1 is provided with the toothed chain slideway 2, the toothed chain slides to be provided with the walking motor 4, the spraying pipe 5 is arranged on the walking motor 4, the electric cabinet 7 controls the walking motor 4 to move on the toothed chain slideway 2, so that the spraying pipe 5 is driven to move back and forth, the concrete is sprayed and maintained through the mist spraying head 6, the travel switch 3 is triggered to automatically move in the reverse direction when the spraying pipe moves to the end part of the toothed chain slideway 2, and the reciprocating movement of the maintenance spraying pipe 5 is realized through the travel switch 3; the utility model discloses a two lining automatic spray maintenance platform trucks can automatic control shower 5 the front and back come and go the removal, two lining in the tunnel carry out the continuation and come and go the maintenance of spraying, spray the maintenance through the concrete of two lining in a plurality of vaporific shower heads 6 in the tunnel, high work efficiency, and can not cause concrete surface damage, the removal between walking motor 4 and the toothed chain slide 2 is more nimble, be difficult for producing phenomenons such as the card is dun, vaporific shower head 6 makes the maintenance liquid spray more evenly, can not cause the wasting of resources.
A two-lined automatic spray maintenance truck according to the exemplary embodiment will be further described below.
In an embodiment of this embodiment, the trolley body 1 has a frame structure formed by connecting a plurality of supports, and specifically includes a main gantry 100, a cantilever beam 110 and an inclined strut 120, the cantilever beam 110 includes a plurality of beams, the plurality of cantilever beams 110 are vertically and parallelly inserted and arranged on the main gantry 100, the cantilever beam 110 extends to two sides, and a partition is mounted on the cantilever beam 110 to form two symmetrical maintenance platforms, so as to ensure the balance of the trolley body 1, the maintenance platforms on two sides are symmetrically distributed, and escalators are welded between two adjacent maintenance platforms. When the maintenance platform is used, round steel can be welded on the surface of the maintenance platform, friction between the surface of the working platform and soles of constructors is increased through the round steel, and the constructors are prevented from slipping.
As an example, the height of the trolley body 1 is not less than 4.5 m, the width is reasonably designed according to the size of the tunnel, so that the trolley can normally pass through the second lining of the tunnel, the length of the trolley body 1 is preferably 9 m, the trolley with the length of 9 m is stable in structure, the manufacturing cost is low, the trolley can be simultaneously suitable for short-distance tunnels and long-distance tunnels, and when the trolley is applied to short-distance tunnels, a plurality of trolleys can be arranged, or the spraying maintenance can be performed in sections.
In an embodiment of one embodiment of the present invention, a toothed chain slideway 2 is provided at the top of the trolley body 1 along the length direction thereof, travel switches 3 are provided at both ends of the toothed chain slideway 2, a traveling motor 4 is provided between the two travel switches 3 on the toothed chain slideway 2, teeth adapted to the toothed chain slideway 2 are provided at the bottom of the traveling motor 4, the traveling motor 4 moves back and forth on the toothed chain slideway 2, a spray pipe 5 is fixedly connected to the top of the traveling motor 4 through a support rod 15, the spray pipe 5 is in an arc shape matching with the profile of the two liners, a plurality of mist spray headers 6 are uniformly provided at intervals outside the spray pipe 5, and the mist spray headers 6 can spray the curing liquid in a mist shape to uniformly spray the curing liquid on the concrete of the two liners for curing the concrete; the trolley body 1 is provided with an electric cabinet 7, and the travel switch 3 and the traveling motor 4 are electrically connected with the electric cabinet 7 respectively.
As an example, the length of the toothed chain slideway 2 is 9 meters, which is the same as the length of the trolley body 1, the walking motor 4 moves at a constant speed through the toothed chain slideway 2 under the control of the electric cabinet 7, the walking motor 4 triggers the travel switch 3 to automatically move in the reverse direction when moving to the end of the slideway, and the maintenance shower pipe 5 moves back and forth through the travel switch 3.
In an implementation manner of this embodiment, a timing switch is disposed in the electric cabinet 7, the timing switch is connected to the traveling motor 4, and the start-stop time can be adjusted according to actual needs through the timing switch, so as to realize automatic spraying maintenance work.
In one embodiment of this embodiment, a liquid storage tank 8 is provided on the carriage body 1, a maintenance liquid is provided in the liquid storage tank 8, the liquid storage tank 8 is communicated with the shower pipe 5 through a first delivery pipe 13, and a water pump is provided on the first delivery pipe 13 and connected to the electric cabinet 7.
In a concrete realization, through the opening and close of electric cabinet 7 control water pump, open the water pump, maintenance liquid sends to curved shower 5 in through first conveyer pipe 13, through the outside blowout of vaporific shower head 6, closes the water pump and then stops carrying maintenance liquid.
As an example, a heating element is arranged in the liquid storage tank 8, the heating element is connected with the electric control box 7, the electric control box 7 controls the heating temperature of the heating element, and the heating temperature of the curing liquid is adjusted, so that the temperature of the concrete is improved.
In one embodiment of this embodiment, the shower pipe 5 is provided with a temperature sensor 9 and a humidity sensor 10, and the temperature sensor 9 and the humidity sensor 10 are respectively connected to the electric cabinet 7.
It should be noted that the temperature sensor 9 is used for detecting the temperature of the concrete in the tunnel secondary lining, feeding back the detected temperature signal to the electric cabinet 7, and adjusting the heating temperature of the heating element in the liquid storage tank 8 through the electric cabinet 7, so as to adjust the temperature of the spraying curing liquid, achieve the purpose of adjusting the temperature of the concrete, reduce the temperature difference between the inside and the outside of the concrete, and avoid the cracking of the concrete. The humidity sensor 10 is used for detecting the concrete humidity of the tunnel secondary lining, feeding back a detected humidity signal to the electric cabinet 7, controlling the opening and closing size of the water pump by the electric cabinet 7, adjusting the amount of the delivered maintenance liquid and improving the humidity.
In an embodiment of this embodiment, the spraying pipe 5 is further provided with a dust concentration sensor 11, and the dust concentration sensor 11 is connected to the electric cabinet 7; still be equipped with dust collector 12 on the above-mentioned platform truck body 1, dust collector 12 is connected with liquid reserve tank 8 through second conveyer pipe 14, is equipped with the delivery pump on the second conveyer pipe 14, and the delivery pump is connected with electric cabinet 7.
The dust concentration sensor 11 is configured to detect the concentration of dust in the tunnel, and when the concentration of dust in the tunnel is high, the dust collector 12 sprays water into the tunnel, the water mist sprayed by the dust collector 12 collides with dust particles in the air, intercepts and condenses the dust particles, and the dust particles fall with water droplets to realize dust fall in the tunnel.
Specifically, the dust removing device 12 includes a main pipe and a plurality of branch pipes, and an atomizing nozzle is arranged at an end of each branch pipe and faces the vault of the secondary tunnel lining.
In one embodiment of this embodiment, the main door frame 100, the cantilever beam 110, and the diagonal brace 120 are welded by using i-beams, and are machined by using 18 i-beams, so as to increase the strength and durability of the trolley body 1.
In one embodiment of this embodiment, the shower pipe 5 is made of a steel pipe having high rigidity. Because the spray pipe 5 is only supported by the top of the trolley body 1, the rigidity of the spray pipe 5 can be increased by adopting a strong-rigidity steel pipe, and the deformation is avoided.
In one embodiment of this embodiment, the bottom of the trolley body 1 is provided with rollers 16, and the trolley body 1 is moved conveniently by the rollers 16.
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. The two-lining automatic spraying maintenance trolley is characterized by comprising a trolley body, wherein the trolley body is formed by connecting a plurality of supports, a toothed chain slide way is arranged at the top of the trolley body along the length direction of the trolley body, travel switches are arranged at two ends of the toothed chain slide way, a walking motor is arranged between the two travel switches on the toothed chain slide way, teeth matched with the toothed chain slide way are arranged at the bottom of the walking motor, the top of the walking motor is fixedly connected with a spray pipe through a support rod, the spray pipe is arc-shaped and matched with the profile of a two-lining wheel, and a plurality of mist spray heads are uniformly arranged at intervals outside the spray pipe; the trolley body is provided with an electric cabinet, and the travel switch and the traveling motor are respectively electrically connected with the electric cabinet.
2. The two-liner automatic spray maintenance trolley according to claim 1, wherein a timing switch is arranged in the electric cabinet, and the timing switch is connected with the walking motor.
3. The automatic spraying maintenance trolley with two liners according to claim 1, wherein a liquid storage tank is arranged on the trolley body, maintenance liquid is arranged in the liquid storage tank, the liquid storage tank is communicated with the spraying pipe through a first conveying pipe, a water pump is arranged on the first conveying pipe, and the water pump is connected with the electric control box.
4. The two-liner automatic spray maintenance trolley according to claim 1, wherein the trolley body is a frame structure formed by connecting a plurality of supports, and the trolley body comprises a main door frame, a cantilever beam and a diagonal brace.
5. The two-lining automatic spray maintenance trolley according to claim 4, wherein the main gantry, the cantilever beam and the diagonal brace are welded by using I-steel.
6. The two-liner automatic spray maintenance trolley according to claim 5, wherein the cantilever beam extends to two sides, and a partition plate is mounted on the cantilever beam to form two symmetrical maintenance platforms.
7. The two-lined automatic spray maintenance trolley according to claim 1, wherein the spray pipes are made of strong rigid steel pipes.
8. The two-liner automatic spray maintenance trolley according to claim 1, wherein a temperature sensor and a humidity sensor are arranged on the spray pipe, and the temperature sensor and the humidity sensor are respectively connected with the electric cabinet.
9. The two-liner automatic spraying maintenance trolley according to claim 3, wherein a dust concentration sensor is further arranged on the spraying pipe, and the dust concentration sensor is connected with the electric cabinet; the trolley body is also provided with a dust removal device, and the dust removal device is connected with the liquid storage tank through a second conveying pipe.
10. The two-lined automatic spray maintenance trolley according to claim 1, wherein rollers are provided at the bottom of the trolley body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221435535.8U CN217462189U (en) | 2022-06-08 | 2022-06-08 | Two lining automatic spray maintenance platform trucks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221435535.8U CN217462189U (en) | 2022-06-08 | 2022-06-08 | Two lining automatic spray maintenance platform trucks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217462189U true CN217462189U (en) | 2022-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221435535.8U Active CN217462189U (en) | 2022-06-08 | 2022-06-08 | Two lining automatic spray maintenance platform trucks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217462189U (en) |
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2022
- 2022-06-08 CN CN202221435535.8U patent/CN217462189U/en active Active
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