CN215977200U - Sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment - Google Patents
Sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment Download PDFInfo
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- CN215977200U CN215977200U CN202121382283.2U CN202121382283U CN215977200U CN 215977200 U CN215977200 U CN 215977200U CN 202121382283 U CN202121382283 U CN 202121382283U CN 215977200 U CN215977200 U CN 215977200U
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Abstract
The utility model provides a sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment, which comprises a containing pipe, a bottom plate, an end part dismounting frame structure, a lifting screw rod, a connecting column, a conical crushing head, auger blades, a rock sampling frame structure, an extending pedal frame structure, a supporting rod, an installation threaded hole, a conical threaded column, a limiting ring, a rotary threaded column and a threaded sleeve, wherein the bottom plate is welded at the lower part of the outer side of the containing pipe; the end part dismounting frame structure is arranged at the upper part of the accommodating pipe; the lifting screw rod is arranged in the middle of the inner side of the end part dismounting frame structure. The baffle and the spring piece are arranged, so that a rock sample can only enter the inner side of the rock storage cavity in a one-way mode, the sample enters the inner side of the rock storage cavity when the connecting column moves downwards in cooperation with the auger blade, and the sample is prevented from leaking out of the inner side of the rock storage cavity when the connecting column moves upwards.
Description
Technical Field
The utility model belongs to the technical field of foundation investigation, and particularly relates to a sampling device for geotechnical engineering foundation investigation, which can be used for carrying out torque adjustment.
Background
The foundation refers to a soil body or a rock body for supporting a foundation under a building, the foundation can be divided into a natural foundation and an artificial foundation, the stability of the foundation mainly depends on the cause type, the structural characteristics, the hydrogeological regulation, the physical and mechanical properties of the rock body, the distribution condition and the like of the foundation, a sampling device needs to be used for soil sampling of the naturally formed foundation before the building construction, but the existing sampling device has certain defects.
But current geotechnical engineering is sampling device for ground reconnaissance still has the sample and scatters the outside easily when collecting, the bottom plate is lower with ground laminating degree and take out the sample the time more hard problem.
Therefore, it is necessary to provide a sampling device for geotechnical engineering ground investigation, which can perform torque adjustment.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a sampling device for geotechnical engineering foundation investigation, which can be used for torque adjustment, and aims to solve the problems that samples of the existing sampling device for geotechnical engineering foundation investigation are easy to scatter to the outside during collection, the fitting degree of a bottom plate and the ground is low, and the samples are difficult to take out. A sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment comprises a containing pipe, a bottom plate, an end part dismounting frame structure, a lifting screw rod, a connecting column, a conical crushing head, auger blades, a rock sampling frame structure, an extending pedal frame structure, a supporting rod, an installation threaded hole, a conical threaded column, a limiting ring, a rotary threaded column and a threaded sleeve, wherein the bottom plate is welded at the lower part of the outer side of the containing pipe; the end part dismounting frame structure is arranged at the upper part of the accommodating pipe; the lifting screw rod is arranged in the middle of the inner side of the end part dismounting frame structure; the connecting column is welded at the lower part of the lifting screw rod; the conical crushing head is welded at the lower part of the connecting column; the auger blades are respectively welded at the upper part and the lower part of the connecting column and the outer side of the conical crushing head; the rock sampling frame structures are respectively arranged at the front end and the rear end of the connecting column; the extending pedal frame structures are respectively arranged at the left side and the right side of the bottom plate; the supporting rods are respectively welded at the included angle of the accommodating pipe and the bottom plate; the mounting threaded holes are formed in the periphery of the inner side of the bottom plate; the conical threaded column is in threaded connection with the lower part of the inner side of the mounting threaded hole; the limiting ring is welded on the upper part of the outer side of the conical threaded column; the rotary threaded columns are respectively in threaded connection with the left side and the right side of the lifting screw rod; the threaded sleeve is in threaded connection with one side of the rotary threaded column, which is far away from the lifting screw rod; the rock sampling frame structure comprises a sampling tube, a rock storage cavity, a conical head, a conical feeding hole, a baffle plate and a spring piece, wherein the rock storage cavity is arranged on the inner side of the sampling tube; the conical head is welded on the left side of the sampling tube; the conical feed inlet is formed in the inner side of the conical head, and the inner side of the conical feed inlet is communicated with the rock storage cavity; the baffle plates are respectively arranged at the upper part and the lower part of the left side in the rock storage cavity and are in shaft connection with the inner side of the sampling tube; one side of the spring piece is in screw connection with the left side of the interior of the sampling tube, and the other side of the spring piece is in screw connection with the right side of the baffle.
Preferably, the extended pedal frame structure comprises a pedal, a groove, a conical protection block, a connecting rod, a rotating frame and a positioning pin, wherein the groove is formed in the upper part of the inner side of the pedal; the conical protection block is welded at the lower part of the pedal; the connecting rod is welded on the right side of the pedal; the rotating frame is arranged on the right side of the connecting rod; the positioning pin is inserted in the inner side of the rotating frame.
Preferably, the end part dismounting frame structure comprises an end cover, an edge positioning ring, a fixing threaded hole, a handle, an ear plate, an L-shaped connecting plate and a mounting bolt, wherein the edge positioning ring is welded at the lower part of the end cover; the fixed threaded hole is formed in the middle of the inner side of the end cover; the handles are respectively welded on the left side and the right side of the end cover; the ear plate is welded on the upper part of the end cover; the front end of the lower part of the L-shaped connecting plate is axially connected to the inner side of the lug plate; the mounting bolt is in threaded connection with the upper part of the rear end of the L-shaped connecting plate.
Preferably, the left side lower part slope setting left of sampling tube, the sampling tube bolted connection both ends around the spliced pole respectively, the left side of baffle and the right side laminating of conical head.
Preferably, the rotating frame is provided with a plurality of rotating frames, two rotating frames are respectively welded on the left side and the right side of the outer portion of the bottom plate in a group, the rotating frame on the left side is welded with the connecting rod, and the connecting rod on the right side is connected with the bottom plate.
Preferably, the connecting rod on the left side and the rotating frame on the right side are arranged in a mutually crossed mode, and the positioning pins are respectively inserted into the connecting rods on the left side and the right side.
Preferably, the ear plates are arranged in a plurality of groups, two ear plates are respectively connected to the periphery of the upper part of the end cover in a group, and the ear plates are respectively arranged on the left side and the right side of the front end of the lower part of the L-shaped connecting plate.
Preferably, the lifting screw rod is in threaded connection with the inner side of the fixed threaded hole, the end cover is placed on the upper portion of the containing pipe, the edge positioning ring is inserted into the upper portion of the inner side of the containing pipe, and the periphery of the upper portion of the outer side of the containing pipe is provided with the spiral holes.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the arrangement of the baffle and the spring piece is beneficial to enabling a rock sample to enter the inner side of the rock storage cavity in a one-way mode, the sample enters the inner side of the rock storage cavity when the connecting column moves downwards in cooperation with the auger blade, and the sample is prevented from leaking out of the inner side of the rock storage cavity when the connecting column moves upwards.
2. According to the utility model, the arrangement of the conical head and the conical feeding hole is beneficial to matching with the rotation of the connecting column and the auger blade to crush the rock, so that the rock sample is prevented from being large in size and clamped on the inner side of the sampling tube to influence the normal sampling work of the sampling tube.
3. According to the utility model, the arrangement of the pedal, the groove and the conical protection block is beneficial to fixing the bottom plate through the weight of workers, and the conical protection block increases the friction force between the pedal and the ground, so that the bottom plate is stably attached to the ground, and the rotation between the bottom plate and the ground is prevented when the device is used.
4. In the utility model, the arrangement of the connecting rod, the rotating frame and the positioning pin is beneficial to rotating the pedals to the left side and the right side of the accommodating pipe when the device is idle, so that the extending pedal frame structure can be conveniently retracted by workers, and meanwhile, the extending pedal frame structure can be conveniently detached by the workers.
5. In the utility model, the arrangement of the lug plate, the L-shaped connecting plate and the mounting bolt is beneficial to facilitating the quick disassembly of the end cover by workers, so that the sampling tube is taken out from the inner side of the containing tube, the time for taking out the sampling tube is shortened, and the device is convenient to maintain or repair.
6. According to the utility model, the arrangement of the end cover, the edge positioning ring and the handle is beneficial to detaching the end cover and the edge positioning ring, so that a worker can conveniently maintain the storage pipe and the rock sampling frame structure respectively, the maintenance time of the device is shortened, and the maintenance cost is further reduced.
7. According to the utility model, the arrangement of the mounting threaded hole, the conical threaded column and the limiting ring is beneficial to increasing the friction force between the bottom plate and the ground, further rotation between the bottom plate and the ground is prevented, and meanwhile, the conical threaded column is convenient for workers to detach and replace.
8. According to the utility model, the arrangement of the rotary threaded column and the threaded sleeve is beneficial to adjusting the distance between the threaded sleeve and the lifting screw rod through the spiral rotation formed by the rotary threaded column and the threaded sleeve, so that the force application point of the device is adjusted, and the torque of the lifting screw rod during rotation is increased.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the rock sampling frame structure of the present invention.
Fig. 3 is a schematic structural view of the extended footrest structure of the present invention.
Fig. 4 is a structural schematic view of the end demounting frame structure of the present invention.
In the figure:
1. receiving a tube; 2. a base plate; 3. an end disassembly frame structure; 31. an end cap; 32. an edge positioning ring; 33. fixing the threaded hole; 34. a handle; 35. an ear plate; 36. an L-shaped connecting plate; 37. installing a bolt; 4. lifting the screw rod; 5. connecting columns; 6. a conical crushing head; 7. a screw blade; 8. a rock sampling frame structure; 81. a sampling tube; 82. a rock storage chamber; 83. a conical head; 84. a conical feed inlet; 85. a baffle plate; 86. a spring plate; 9. an extended foot rest structure; 91. a pedal; 92. a groove; 93. a tapered guard block; 94. a connecting rod; 95. a rotating frame; 96. positioning pins; 10. a support bar; 11. installing a threaded hole; 12. a tapered threaded post; 13. a limiting ring; 14. rotating the threaded column; 15. a threaded bushing.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
example (b):
as shown in the attached drawings 1 and 2, the sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment comprises a storage pipe 1, a bottom plate 2, an end part dismounting frame structure 3, a lifting screw rod 4, a connecting column 5, a conical crushing head 6, an auger blade 7, a rock sampling frame structure 8, an extension pedal frame structure 9, a supporting rod 10, an installation threaded hole 11, a conical threaded column 12, a limiting ring 13, a rotary threaded column 14 and a threaded sleeve 15, wherein the bottom plate 2 is welded at the lower part of the outer side of the storage pipe 1; the end part dismounting frame structure 3 is arranged at the upper part of the containing pipe 1; the lifting screw rod 4 is arranged in the middle of the inner side of the end part dismounting frame structure 3; the connecting column 5 is welded at the lower part of the lifting screw rod 4; the conical crushing head 6 is welded at the lower part of the connecting column 5; the auger blades 7 are respectively welded at the upper part and the lower part of the connecting column 5 and the outer side of the conical crushing head 6; the rock sampling frame structures 8 are respectively arranged at the front end and the rear end of the connecting column 5; the extending pedal frame structures 9 are respectively arranged at the left side and the right side of the bottom plate 2; the supporting rods 10 are respectively welded at the included angle parts of the accommodating pipe 1 and the bottom plate 2; the mounting threaded holes 11 are formed in the periphery of the inner side of the bottom plate 2; the conical threaded column 12 is in threaded connection with the lower part of the inner side of the mounting threaded hole 11; the limiting ring 13 is welded at the upper part of the outer side of the tapered threaded column 12; the rotary threaded columns 14 are respectively in threaded connection with the left side and the right side of the lifting screw rod 4; the threaded sleeve 15 is in threaded connection with one side of the rotary threaded column 14 away from the lifting screw rod 4; the rock sampling frame structure 8 comprises a sampling tube 81, a rock storage cavity 82, a conical head 83, a conical feed port 84, a baffle 85 and a spring piece 86, wherein the rock storage cavity 82 is arranged on the inner side of the sampling tube 81; the conical head 83 is welded at the left side of the sampling tube 81; the conical feed port 84 is arranged on the inner side of the conical head 83, and the inner side of the conical head is communicated with the rock storage cavity 82; the baffle plates 85 are respectively arranged at the upper part and the lower part of the left side in the rock storage cavity 82 and are in shaft connection with the inner side of the sampling tube 81; one side of the spring piece 86 is connected with the left screw in the sampling tube 81, and the other side is connected with the right screw of the baffle 85; the spliced pole 5 drives the auger blade 7 rotatory, and auger blade 7 makes spliced pole 5 get into the rock in, it is inboard that the rubble gets into toper feed inlet 84, promotes baffle 85 simultaneously and rotates to the inboard of rock storage chamber 82, makes the rock sample get into the inboard of rock storage chamber 82, and during reverse rotation, rock storage chamber 82 and the right side laminating of cone 83 make the left side of rock storage chamber 82 closed, prevent that the rock sample from falling to the outside.
In the above embodiment, as shown in fig. 3, specifically, the extended foot rest structure 9 includes a pedal 91, a groove 92, a tapered guard block 93, a connecting rod 94, a rotating frame 95 and a positioning pin 96, wherein the groove 92 is opened at the upper inner side of the pedal 91; the conical protection block 93 is welded at the lower part of the pedal 91; the connecting rod 94 is welded at the right side of the pedal 91; the rotating frame 95 is arranged at the right side of the connecting rod 94; the positioning pin 96 is inserted into the inner side of the rotating frame 95; the staff places both feet in the inboard upper portion of footboard 91, and footboard 91 atress moves down, makes the firm laminating of footboard 91 subaerial through toper protection piece 93 to increase the frictional force between bottom plate 2 and the ground.
In the above embodiment, as shown in fig. 4, specifically, the end-demounting frame structure 3 includes an end cover 31, an edge positioning ring 32, a fixing threaded hole 33, a handle 34, an ear plate 35, an L-shaped connecting plate 36 and a mounting bolt 37, wherein the edge positioning ring 32 is welded to the lower portion of the end cover 31; the fixing threaded hole 33 is formed in the middle of the inner side of the end cover 31; the handles 34 are respectively welded at the left side and the right side of the end cover 31; the ear plate 35 is welded on the upper part of the end cover 31; the front end of the lower part of the L-shaped connecting plate 36 is axially connected with the inner side of the lug plate 35; the mounting bolt 37 is in threaded connection with the upper part of the rear end of the L-shaped connecting plate 36; the L-shaped coupling plate 36 is rotated downward to screw the mounting bolt 37 to the outer upper portion of the receiving pipe 1, and then the elevation screw bar 4 is rotated and the elevation screw bar 4 is moved upward or downward inside the fixing screw hole 33.
In the above embodiment, specifically, the left side of the sampling tube 81 is obliquely arranged towards the lower left part, the sampling tube 81 is respectively bolted to the front end and the rear end of the connecting column 5, and the left side of the baffle 85 is attached to the right side of the conical head 83.
In the above embodiment, specifically, the plurality of rotating frames 95 are provided, two of the rotating frames are respectively welded to the left and right sides of the outer portion of the bottom plate 2, the rotating frame 95 on the left side is welded to the connecting rod 94, and the connecting rod 94 on the right side is connected to the bottom plate 2.
In the above embodiment, specifically, the left connecting rod 94 and the right rotating frame 95 are disposed to intersect with each other, and the positioning pins 96 are respectively inserted into the left and right connecting rods 94.
In the above embodiment, specifically, a plurality of the ear plates 35 are provided, two of the ear plates are respectively connected to the upper periphery of the end cover 31 in a group, and the ear plates 35 are respectively provided at the left and right sides of the front end of the lower portion of the L-shaped connecting plate 36.
In the above embodiment, specifically, the lifting screw rod 4 is screwed inside the fixing threaded hole 33, the end cover 31 is placed on the upper portion of the storage tube 1, the edge positioning ring 32 is inserted into the upper portion of the inner side of the storage tube 1, and the periphery of the upper portion of the outer side of the storage tube 1 is provided with the screw holes.
Principle of operation
In the utility model, when in use, the bottom plate 2 is placed on the ground, the lower part of the conical threaded column 12 is contacted with the ground, the pedal 91 is rotated outwards to make the conical protection block 93 contacted with the ground, then a worker places two feet on the upper part of the inner side of the pedal 91, the pedal 91 is forced to move downwards, the pedal 91 is firmly attached to the ground through the conical protection block 93, so that the friction force between the bottom plate 2 and the ground is increased, then the threaded sleeve 15 is rotated to adjust the position of the threaded sleeve 15 on the outer side of the rotary threaded column 14, so as to adjust the moment, then the lifting screw rod 4 is rotated through the rotary threaded column 14 and the threaded sleeve 15, the lifting screw rod 4 moves downwards on the inner side of the fixed threaded hole 33 to push the connecting column 5 and the conical crushing head 6 to rotate downwards, at the moment, the auger blade 7 makes the connecting column 5 and the conical crushing head 6 enter the ground, the sampling tube 81 rotates leftwards along with the connecting column 5, crushed stones enter the inner side of the conical feeding hole 84, meanwhile, the baffle 85 is pushed to rotate towards the inner side of the rock storage cavity 82, a rock sample enters the inner side of the rock storage cavity 82, after sampling is completed, the lifting screw rod 4 rotates reversely, the lifting screw rod 4 moves upwards, the rock storage cavity 82 is attached to the right side of the conical head 83, the left side of the rock storage cavity 82 is closed, the rock sample is prevented from falling to the outer side, then the mounting bolt 37 is unscrewed, the L-shaped connecting plate 36 rotates upwards, the end cover 31 is taken down through the handle 34, and then the sample inside the rock storage cavity 82 is taken out.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention.
Claims (8)
1. The sampling device is characterized by comprising a containing pipe (1), a bottom plate (2), an end dismounting frame structure (3), a lifting screw rod (4), a connecting column (5), a conical crushing head (6), auger blades (7), a rock sampling frame structure (8), an extending pedal frame structure (9), a supporting rod (10), an installation threaded hole (11), a conical threaded column (12), a limiting ring (13), a rotary threaded column (14) and a threaded sleeve (15), wherein the bottom plate (2) is welded on the lower part of the outer side of the containing pipe (1); the end part dismounting frame structure (3) is arranged at the upper part of the accommodating pipe (1); the lifting screw rod (4) is arranged in the middle of the inner side of the end part dismounting frame structure (3); the connecting column (5) is welded at the lower part of the lifting screw rod (4); the conical crushing head (6) is welded at the lower part of the connecting column (5); the auger blades (7) are respectively welded at the upper part and the lower part of the connecting column (5) and the outer side of the conical crushing head (6); the rock sampling frame structures (8) are respectively arranged at the front end and the rear end of the connecting column (5); the extending pedal frame structures (9) are respectively arranged at the left side and the right side of the bottom plate (2); the supporting rods (10) are respectively welded at the included angle of the accommodating pipe (1) and the bottom plate (2); the mounting threaded holes (11) are formed in the periphery of the inner side of the bottom plate (2); the conical threaded column (12) is in threaded connection with the lower part of the inner side of the mounting threaded hole (11); the limiting ring (13) is welded at the upper part of the outer side of the conical threaded column (12); the rotary threaded columns (14) are respectively in threaded connection with the left side and the right side of the lifting screw rod (4); the threaded sleeve (15) is in threaded connection with one side of the rotary threaded column (14) far away from the lifting screw rod (4); the rock sampling frame structure (8) comprises a sampling tube (81), a rock storage cavity (82), a conical head (83), a conical feed port (84), a baffle plate (85) and a spring piece (86), wherein the rock storage cavity (82) is arranged on the inner side of the sampling tube (81); the conical head (83) is welded at the left side of the sampling tube (81); the conical feed inlet (84) is arranged on the inner side of the conical head (83), and the inner side of the conical feed inlet is communicated with the rock storage cavity (82); the baffle plates (85) are respectively arranged at the upper part and the lower part of the left side in the rock storage cavity (82) and are in shaft connection with the inner side of the sampling pipe (81); one side of the spring piece (86) is in screw connection with the left side of the interior of the sampling tube (81), and the other side of the spring piece is in screw connection with the right side of the baffle plate (85).
2. The moment-adjustable sampling device for geotechnical ground investigation of claim 1, wherein said extended foot rest structure (9) comprises a pedal (91), a groove (92), a tapered guard block (93), a connecting rod (94), a rotating frame (95) and a positioning pin (96), said groove (92) is opened at the inner upper part of the pedal (91); the conical protection block (93) is welded at the lower part of the pedal (91); the connecting rod (94) is welded on the right side of the pedal (91); the rotating frame (95) is arranged on the right side of the connecting rod (94); the positioning pin (96) is inserted into the inner side of the rotating frame (95).
3. The moment-adjustable sampling device for geotechnical ground investigation of claim 1, wherein said end-dismantling frame structure (3) comprises an end cap (31), an edge positioning ring (32), a fixing threaded hole (33), a handle (34), an ear plate (35), an L-shaped connecting plate (36) and a mounting bolt (37), said edge positioning ring (32) is welded to the lower portion of the end cap (31); the fixing threaded hole (33) is formed in the middle of the inner side of the end cover (31); the handles (34) are respectively welded on the left side and the right side of the end cover (31); the ear plate (35) is welded on the upper part of the end cover (31); the front end of the lower part of the L-shaped connecting plate (36) is axially connected with the inner side of the lug plate (35); the mounting bolt (37) is in threaded connection with the upper part of the rear end of the L-shaped connecting plate (36).
4. The sampling device for geotechnical ground investigation that can carry out moment adjustment according to claim 1, characterized in that, the left side of sampling tube (81) is inclined to the lower left, sampling tube (81) bolted connection is at the front and back both ends of spliced pole (5) respectively, the left side of baffle (85) and the right side of conical head (83) laminate.
5. The sampling device for geotechnical ground investigation that can carry out moment adjustment according to claim 2, characterized in that, said swivel mount (95) is provided with a plurality of, two respectively for a set are welded on the outside left and right sides of the bottom plate (2), said swivel mount (95) on the left side is welded with the connecting rod (94), the connecting rod (94) on the right side is connected with the bottom plate (2).
6. The moment-adjustable sampling device for geotechnical ground investigation of claim 2, wherein said left connecting rod (94) and right rotating frame (95) are disposed to cross each other, and said positioning pins (96) are inserted into the left and right connecting rods (94), respectively.
7. The moment-adjustable sampling device for geotechnical ground investigation of claim 3, wherein said ear plates (35) are provided in plurality, two of which are connected in a group at the upper peripheral position of said end cap (31), said ear plates (35) being respectively provided at the left and right sides of the lower front end of said L-shaped connecting plate (36).
8. The sampling device for geotechnical ground investigation that can carry out moment adjustment according to claim 3, characterized in that, the lifting screw rod (4) is screwed inside the fixed threaded hole (33), the end cap (31) is placed on the upper portion of the storage tube (1), the edge positioning ring (32) is inserted on the upper portion of the inner side of the storage tube (1), and the periphery of the upper portion of the outer side of the storage tube (1) is provided with screw holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382283.2U CN215977200U (en) | 2021-06-21 | 2021-06-21 | Sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121382283.2U CN215977200U (en) | 2021-06-21 | 2021-06-21 | Sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215977200U true CN215977200U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121382283.2U Active CN215977200U (en) | 2021-06-21 | 2021-06-21 | Sampling device for geotechnical engineering foundation investigation capable of carrying out torque adjustment |
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| Country | Link |
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| CN (1) | CN215977200U (en) |
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2021
- 2021-06-21 CN CN202121382283.2U patent/CN215977200U/en active Active
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