CN212704923U - Submerged arc welding stand double-station welding device - Google Patents
Submerged arc welding stand double-station welding device Download PDFInfo
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- CN212704923U CN212704923U CN202020607317.2U CN202020607317U CN212704923U CN 212704923 U CN212704923 U CN 212704923U CN 202020607317 U CN202020607317 U CN 202020607317U CN 212704923 U CN212704923 U CN 212704923U
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- 238000003466 welding Methods 0.000 title claims abstract description 72
- 230000007246 mechanism Effects 0.000 claims description 34
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a submerged arc welding unit platform duplex position welding set, including braced system, mobile welding system and station system and electric cabinet, braced system includes two bottom slide rails that are parallel to each other, installs two sets of fixed bolsters at both ends about two bottom slide rails and sets up spout and two lower spouts on two of two bottom slide rail lateral surfaces. Due to the adoption of the technical scheme, the beneficial effects of the utility model are that: the utility model discloses an electric cabinet makes the two closely cooperate to the control of removing welding system and station system, accomplishes the weldment work to the work piece, and degree of automation is high, and not only production efficiency is high, still is favorable to reducing workman intensity of labour, reduction in production cost.
Description
Technical Field
The utility model relates to an electric power iron tower production and processing technology field, a submerged arc welding stand-alone station duplex position welding set specifically says so.
Background
In the production and processing process of the electric power iron tower, a cylindrical workpiece needs to be welded, the existing welding mode is manual welding or single-station welding, the automation degree is low, the production efficiency is low, the labor cost is high, and the labor intensity of workers is high.
Disclosure of Invention
The utility model aims at providing a single board duplex position welding set of submerged arc welding.
In order to achieve the above purpose, the technical scheme of the utility model is that: a submerged arc welding single-station double-station welding device comprises a supporting system, a movable welding system, a station system and an electric cabinet, wherein the supporting system comprises two bottom sliding rails which are parallel to each other, two groups of fixed supports which are arranged at the left end and the right end of the two bottom sliding rails, and two upper sliding grooves and two lower sliding grooves which are arranged on the outer side surfaces of the two bottom sliding rails;
the movable welding system comprises transverse moving cylinders, transverse moving bases, middle support columns, middle seats, vertical plates, sliding plates and a movable welding mechanism, wherein two groups of four groups of transverse moving cylinders are oppositely arranged at the head parts of the outer sides of two bottom sliding rails, a group of two groups of transverse moving bases are jointly fixed at the middle position between every two groups of transverse moving cylinders with opposite head parts through transverse moving cylinder shafts, a group of two groups of middle seats are respectively welded right above the two groups of transverse moving bases through a middle support column, a transverse moving slide block is arranged at the central position of the inner side wall of each transverse moving base, a middle slide block is arranged at the central position of the inner side wall of each middle seat, two groups of vertical plates are respectively welded at the tops of the two groups of middle seats, a sliding plate is transversely welded at the tops of the two vertical plates, and an, a movable welding mechanism is arranged in the assembling groove;
the station system comprises a first station and a second station which are separated by a certain distance, and is arranged in the middle of the supporting system, the two structures are the same, and the two supporting systems respectively comprise a bottom slideway, a bottom plate, a workbench, a workpiece supporting mechanism and a workpiece rotating mechanism, the number of the bottom slideways is two, and are parallel to each other, four groups of pulleys are welded at the inner sides of four corners of the bottom surface of the bottom plate respectively, four supporting columns are respectively arranged at the inner sides of four corners of the top surface of the bottom plate, the four groups of pulleys are just clamped and arranged on the bottom slideway and can do front-back linear motion, a workbench is arranged on the top of the four supporting columns, a group of two groups of workpiece supporting mechanisms are respectively arranged on the inner sides of the left end and the right end of the top of the workbench, a workpiece is supported between the two groups of workpiece supporting mechanisms, and a workpiece rotating mechanism which upwards passes through the workbench is arranged in the center of the top surface of the bottom plate;
the electric cabinet is arranged on the fixed support close to the left.
Preferably, the fixed bolster includes supporting seat, support post and top crossbeam, the supporting seat is four groups altogether, and every two sets of supporting seat tops that are located same bottom slide rail left and right ends respectively weld have four support posts altogether, and two support post tops that lie in on same bottom slide rail in the above-mentioned four support posts respectively weld have two top crossbeams altogether, respectively are equipped with the spout of two fretworks altogether in the horizontal central line position of every top crossbeam.
Preferably, the movable welding mechanism comprises a movable motor support, a movable motor, a driving sprocket, a bearing seat support, a bearing seat, a driven sprocket, a chain, a welding machine support and a submerged arc welding machine, the movable motor support is arranged at the top of the sliding plate close to the right, the movable motor with the downward head is arranged on the movable motor support, the driving sprocket is arranged at the head of the movable motor through a movable motor shaft, the bearing seat support is arranged at the top of the sliding plate close to the left, the bearing seat is arranged on the bearing seat support, a transmission shaft is arranged at the bottom of the bearing seat, the driven sprocket is arranged at the bottom of the transmission shaft, the driving sprocket and the driven sprocket are positioned on the same horizontal line, the chain is arranged between the driving sprocket and the driven sprocket in a meshing manner, the welding machine support is arranged at.
Preferably, the workpiece supporting mechanism comprises supporting lug plates, auxiliary roller mounting plates and auxiliary rollers, a group of four groups of supporting lug plates in total are respectively mounted on the inner sides of four corners of the top of the workbench, a group of four groups of auxiliary roller mounting plates in total are respectively mounted on each group of supporting lug plates through pin shafts, a group of eight groups of auxiliary rollers in total are respectively mounted on each group of auxiliary roller mounting plates, and the workpiece can be supported by gaps among the eight groups of auxiliary rollers.
Preferably, the workpiece rotating mechanism comprises an ejection cylinder, a bearing plate, a rotating motor and a rotating head, a guide groove is formed in the center of the workbench, the ejection cylinder with a head inserted into the guide groove is mounted in the center of the top of the bottom plate, the bearing plate is welded to the head of the ejection cylinder through an ejection cylinder shaft, the rotating motor with an upward head is mounted on the top of the bearing plate, and the rotating head is mounted on the head of the rotating motor through a rotating motor shaft;
the top of the rotating head is of an elastic cambered surface structure, so that the workpiece can rotate in the moment of contacting with the workpiece, the rotating head can leave the workpiece after the workpiece rotates, and when the rotating head is attached to the workpiece again, the workpiece is driven to rotate again until the workpiece is welded.
Preferably, the left end and the right end of the sliding plate penetrate through the sliding grooves in the top cross beam, and the top cross beam plays a role in supporting the sliding plate to move.
Preferably, the structure of the welding machine support is matched with that of the chain, and the welding machine support and the chain are both split structures.
Due to the adoption of the technical scheme, the beneficial effects of the utility model are that: the utility model discloses an electric cabinet makes the two closely cooperate to the control of removing welding system and station system, accomplishes the weldment work to the work piece, and degree of automation is high, and not only production efficiency is high, still is favorable to reducing workman intensity of labour, reduction in production cost.
Drawings
The present invention will now be further described with reference to the accompanying drawings.
Fig. 1 is a front view of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a top view of the mobile welding system of the present invention.
In the figure: 1. a support system, 11, a slide rail, 12, a fixed bracket, 121, a support base, 122, a support column, 123, a top beam, 124, a slide way, 13, an upper slide way, 14, a lower slide way, 2, a mobile welding system, 21, a traverse cylinder, 22, a traverse base, 23, a middle support column, 24, a middle base, 25, a vertical plate, 26, a slide plate, 27, a mobile welding mechanism, 271, a mobile motor bracket, 272, a mobile motor, 273, a drive sprocket, 274, a bearing bracket, 275, a bearing seat, 276, a driven sprocket, 277, a chain, 278, a welder support, 279, a submerged arc welding machine, 2710, a mobile motor shaft, 2711, a transmission shaft, 28, a traverse cylinder shaft, 29, a traverse slider, 210, a middle slider, 211, an assembly groove, 3, a station system, 31, a first station, 32, a second station, 33, a bottom slide way, 34, a bottom plate, 35, a workbench, 36. the workpiece supporting mechanism comprises 361 a supporting lug plate, 362 a supporting roller mounting plate, 363 a supporting roller, 364 a pin shaft, 37 a workpiece rotating mechanism, 371 a push-out cylinder, 372 a bearing plate, 373 a rotating motor, 374 a rotating head, 375 a guide groove, 376 a push-out cylinder shaft, 377 a rotating motor shaft, 38 a pulley, 39 a support column, 4 an electric cabinet, 5 and a workpiece.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either 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.
As shown in fig. 1-3, the utility model relates to a submerged arc welding single station double-station welding device, which comprises a support system 1, a mobile welding system 2, a station system 3 and an electric cabinet 4, wherein the support system 1 comprises two parallel bottom slide rails 11, two groups of fixed brackets 12 arranged at the left and right ends of the two bottom slide rails 11, and two upper chutes 13 and two lower chutes 14 arranged at the outer side surfaces of the two bottom slide rails 11;
the moving welding system 2 comprises transverse moving cylinders 21, transverse moving bases 22, middle support columns 23, middle seats 24, vertical plates 25, sliding plates 26 and a moving welding mechanism 27, wherein two groups of four groups of transverse moving cylinders 21 are oppositely arranged at the outer sides of two bottom sliding rails 11, a group of two groups of the transverse moving cylinders 21 with the same head are jointly fixed at the middle position between each two groups of the transverse moving cylinders 21 with the same head through a transverse moving cylinder shaft 28, a group of two groups of the transverse moving bases 22 with the same head are jointly fixed at the right upper part of the two groups of the transverse moving bases 22 through a middle support column 23, a group of the middle seats 24 with the same head are respectively welded at the right upper part of the two groups of the transverse moving bases 22, a transverse moving slide block 29 is arranged at the central position of the inner side wall of the middle seat 14, a middle slide block 210 is arranged at the central position of the inner side, an assembly groove 211 is arranged in the middle of the sliding plate 26, and a movable welding mechanism 27 is arranged in the assembly groove 211;
the station system 3 comprises a first station 31 and a second station 32, the first station 31 and the second station 32 are spaced at a certain distance and are arranged in the middle of the support system 1, the first station 31 and the second station 32 have the same structure and respectively comprise a bottom slideway 33, a bottom plate 34, a workbench 35, workpiece support mechanisms 36 and a workpiece rotating mechanism 37, the bottom slideway 33 is provided with two groups and is parallel to each other, four groups of pulleys 38 are welded at the inner sides of four corners of the bottom surface of the bottom plate 34 respectively, four groups of support columns 39 are arranged at the inner sides of four corners of the top surface of the bottom plate 34 respectively, the four groups of pulleys 38 are just clamped and arranged on the bottom slideway 33 and can do front-back linear motion, the workbench 35 is arranged at the tops of the four support columns 39, two groups of workpiece support mechanisms 36 are arranged at the inner sides of the left and right ends of the top of the workbench 35, a workpiece rotating mechanism 37 which upwards passes through the workbench 35 is arranged at the center of the top surface of the bottom plate 34;
the electric cabinet 4 is arranged on the fixed bracket 12 close to the left.
The fixed support 12 comprises supporting seats 121, supporting columns 122 and top cross beams 123, the supporting seats 121 are four groups in total, four supporting columns 122 in total are welded at the tops of the supporting seats 121 positioned at the left end and the right end of the same bottom sliding rail 11 in every two groups, two top cross beams 123 in total are welded at the tops of the two supporting columns 122 positioned on the same bottom sliding rail 11 in the four supporting columns 122, and a sliding groove 124 in total of two hollowed-out parts is arranged at the transverse central line position of each top cross beam 123.
The movable welding mechanism 27 comprises a movable motor bracket 271, a movable motor 272, a driving sprocket 273, a bearing seat bracket 274, a bearing seat 275, a driven sprocket 276, a chain 277, a welding machine support 278 and a submerged arc welding machine 279, wherein the movable motor bracket 271 is arranged at the position close to the right of the top of the sliding plate 26, the movable motor 272 with the head facing downwards is arranged on the movable motor bracket 271, the driving sprocket 273 is arranged at the head of the movable motor 272 through a movable motor shaft 2710, the bearing seat bracket 274 is arranged at the position close to the left of the top of the sliding plate 26, the bearing seat 275 is arranged on the bearing seat bracket 274, a transmission shaft 2711 is arranged at the bottom of the bearing seat 275, the driven sprocket 276 is arranged at the bottom of the transmission shaft 2711, the driving sprocket 273 and the driven sprocket 276 are positioned on the same horizontal line, the chain 277 is engaged between the driving sprocket, a submerged arc welder 279 is mounted to the bottom of the welder mount 278.
The workpiece supporting mechanism 36 includes supporting ear plates 361, auxiliary roller mounting plates 362 and auxiliary rollers 363, a set of four groups of supporting ear plates 361 is mounted on the inner sides of four corners of the top of the working table 35, a set of four groups of auxiliary roller mounting plates 362 is mounted on each group of supporting ear plates 361 through pins 364, a set of eight groups of auxiliary rollers 363 is mounted on each group of auxiliary roller mounting plates 362, and the workpiece 5 can be supported by the gaps between the eight groups of auxiliary rollers 363.
The workpiece rotating mechanism 37 comprises an ejection cylinder 371, a bearing plate 372, a rotating motor 373 and a rotating head 374, wherein a guide groove 375 is formed in the center of the workbench 35, the ejection cylinder 371 with a head inserted into the guide groove 375 is installed in the center of the top of the bottom plate 34, the bearing plate 372 is welded to the head of the ejection cylinder 371 through an ejection cylinder shaft 376, the rotating motor 373 with an upward head is installed on the top of the bearing plate 372, and the rotating head 374 is installed at the head of the rotating motor 373 through a rotating motor shaft 377;
the top of the rotating head 374 is of an elastic cambered surface structure, so that the workpiece 5 can rotate at the moment of contacting with the workpiece, the rotating head 374 leaves the workpiece 5 after the workpiece 5 rotates, and when the rotating head 374 is attached to the workpiece 5 again, the workpiece 5 is driven to rotate again until the welding of the workpiece 5 is completed.
The left end and the right end of the sliding plate 26 penetrate through the sliding grooves 124 on the top cross beam 123, and the top cross beam 123 plays a role in supporting the sliding plate 26 to move.
The structure of the welder support 278 is matched with the structure of the chain 277, and the welder support is of a split structure.
The working principle is as follows: the workpiece 5 is conveyed to the workpiece rotating mechanism 37 of the first station 31 through an external conveying mechanism, the electric cabinet 4 starts the ejection cylinder 371 to move the rotating motor 373 upwards to enable the rotating head 374 to be attached to the workpiece 5, the top of the rotating head 374 is of an elastic cambered surface structure, the workpiece 5 can be enabled to rotate along the auxiliary roller 363 at the moment of contact with the workpiece 5, the rotating head 374 can leave the workpiece 5 after the workpiece 5 rotates, the electric cabinet 4 starts the moving motor 272, the chain 277 is enabled to operate through the driving chain wheel 273 and the driven chain wheel 276, the position of the submerged arc welding machine 279 is changed continuously, welding of the workpiece 5 is completed, and in the welding process, the next workpiece 5 can be placed on the second station 32 to be machined.
The foregoing is a detailed description of the present invention in connection with specific preferred embodiments, and it is not to be construed that the specific embodiments of the present invention are limited to those descriptions. To those skilled in the art to which the invention pertains, without departing from the spirit of the invention, several simple deductions or substitutions can be made, all of which should be considered as belonging to the scope of patent protection defined by the claims filed with the invention.
Claims (7)
1. The utility model provides a submerged arc welding stand duplex position welding set which characterized in that: the welding device comprises a supporting system (1), a mobile welding system (2), a station system (3) and an electric cabinet (4), wherein the supporting system (1) comprises two bottom sliding rails (11) which are parallel to each other, two groups of fixed supports (12) which are arranged at the left end and the right end of the two bottom sliding rails (11), two upper sliding chutes (13) and two lower sliding chutes (14) which are arranged on the outer side surfaces of the two bottom sliding rails (11);
the movable welding system (2) comprises transverse moving cylinders (21), transverse moving bases (22), middle support columns (23), middle seats (24), vertical plates (25), sliding plates (26) and a movable welding mechanism (27), wherein two groups of four groups of transverse moving cylinders (21) are oppositely arranged at the heads outside two bottom sliding rails (11), a group of two groups of transverse moving bases (22) are jointly fixed at the middle position between every two groups of transverse moving cylinders (21) with opposite heads through a transverse moving cylinder shaft (28), a group of two groups of middle seats (24) are welded right above the two groups of transverse moving bases (22) through a middle support column (23), a transverse moving slide block (29) is arranged at the central position of the inner side wall of each transverse moving base (22), the transverse moving slide block (29) is arranged in a lower sliding groove (14), a middle slide block (210) is arranged at the central position of the inner side wall of each middle seat (24), the top of each of the two groups of middle seats (24) is welded with a total of two vertical plates (25), the top of each of the two vertical plates (25) is transversely welded with a sliding plate (26), the middle position of each sliding plate (26) is provided with an assembly groove (211), and a movable welding mechanism (27) is arranged in each assembly groove (211);
the station system (3) comprises a first station (31) and a second station (32), the first station (31) and the second station (32) are spaced at a certain distance and are arranged in the middle of the supporting system (1), the first station and the second station have the same structure and respectively comprise bottom slideways (33), a bottom plate (34), a workbench (35), workpiece supporting mechanisms (36) and workpiece rotating mechanisms (37), the number of the bottom slideways (33) is two and are parallel to each other, a group of four groups of pulleys (38) are welded on the inner sides of four corners of the bottom surface of the bottom plate (34), a group of four support columns (39) are respectively arranged on the inner sides of four corners of the top surface of the bottom plate (34), the four groups of pulleys (38) are just clamped and arranged on the bottom slideways (33) and can do front-back linear motion, the workbench (35) is arranged at the tops of the four support columns (39), a group of two groups of workpiece supporting mechanisms (36) are respectively arranged on, a workpiece (5) is supported between the two groups of workpiece supporting mechanisms (36), and a workpiece rotating mechanism (37) which upwards passes through the workbench (35) is arranged at the center of the top surface of the bottom plate (34);
the electric cabinet (4) is arranged on the fixed bracket (12) close to the left.
2. The single submerged arc welding station double-station welding device of claim 1, characterized in that: fixed bolster (12) are including supporting seat (121), support post (122) and top crossbeam (123), four groups are counted in supporting seat (121), and every two sets of supporting seat (121) top that is located both ends about same bottom slide rail (11) respectively welds four support post (122) altogether, and two support post (122) tops that lie in on same bottom slide rail (11) in above-mentioned four support post (122) respectively weld two top crossbeams (123) altogether, respectively are equipped with one spout (124) of two fretworks altogether in the horizontal central line position of every top crossbeam (123).
3. The single submerged arc welding station double-station welding device of claim 1, characterized in that: the movable welding mechanism (27) comprises a movable motor support (271), a movable motor (272), a driving chain wheel (273), a bearing seat support (274), a bearing seat (275), a driven chain wheel (276), a chain (277), a welding machine support (278) and a submerged arc welding machine (279), wherein the movable motor support (271) is arranged at the position close to the right of the top of the sliding plate (26), the movable motor (272) with the head facing downwards is arranged on the movable motor support (271), the driving chain wheel (273) is arranged at the head of the movable motor (272) through a movable motor shaft (2710), the bearing seat support (274) is arranged at the position close to the left of the top of the sliding plate (26), the bearing seat support (274) is arranged on the bearing seat support (274), a transmission shaft (2711) is arranged at the bottom of the bearing seat (275), the driven chain wheel (276) is, the driving chain wheel (273) and the driven chain wheel (276) are located on the same horizontal line, a chain (277) is meshed between the driving chain wheel (273) and the driven chain wheel (276), a welding machine support (278) is installed at the bottom of the chain (277), and a submerged arc welding machine (279) is installed at the bottom of the welding machine support (278).
4. The single submerged arc welding station double-station welding device of claim 1, characterized in that: work piece supporting mechanism (36) are including supporting otic placode (361), supplementary gyro wheel mounting panel (362) and supplementary gyro wheel (363), respectively install a set of supporting otic placode (361) of four groups in total at workstation (35) top four corners inboard, respectively install a set of supplementary gyro wheel mounting panel (362) of four groups in total through round pin axle (364) on every group supporting otic placode (361), respectively install two sets of supplementary gyro wheel (363) of eight groups in total on every group supplementary gyro wheel mounting panel (362), the space between above-mentioned eight groups of supplementary gyro wheel (363) just can support work piece (5).
5. The single submerged arc welding station double-station welding device of claim 1, characterized in that: the workpiece rotating mechanism (37) comprises an ejection cylinder (371), a bearing plate (372), a rotating motor (373) and a rotating head (374), a guide groove (375) is formed in the center of the workbench (35), the ejection cylinder (371) with a head inserted into the guide groove (375) is installed in the center of the top of the bottom plate (34), the bearing plate (372) is welded to the head of the ejection cylinder (371) through an ejection cylinder shaft (376), the rotating motor (373) with the head upward is installed on the top of the bearing plate (372), and the rotating head (374) is installed on the head of the rotating motor (373) through a rotating motor shaft (377);
the top of the rotating head (374) is of an elastic cambered surface structure, the workpiece (5) can be rotated at the moment of contact with the workpiece, the rotating head (374) can leave the workpiece after the workpiece (5) rotates, and when the rotating head (374) is attached to the workpiece (5) again, the workpiece (5) is driven to rotate again until the workpiece (5) is welded.
6. The single submerged arc welding station double-station welding device according to claim 1 or 2, characterized in that: the left end and the right end of the sliding plate (26) penetrate through the sliding grooves (124) in the top cross beam (123), and the top cross beam (123) plays a role in supporting the sliding plate (26) to move.
7. The single submerged arc welding station double-station welding device of claim 3, characterized in that: the structure of the welding machine support (278) is matched with that of the chain (277), and the welding machine support is of a split structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020607317.2U CN212704923U (en) | 2020-04-21 | 2020-04-21 | Submerged arc welding stand double-station welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020607317.2U CN212704923U (en) | 2020-04-21 | 2020-04-21 | Submerged arc welding stand double-station welding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212704923U true CN212704923U (en) | 2021-03-16 |
Family
ID=74943796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020607317.2U Expired - Fee Related CN212704923U (en) | 2020-04-21 | 2020-04-21 | Submerged arc welding stand double-station welding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212704923U (en) |
-
2020
- 2020-04-21 CN CN202020607317.2U patent/CN212704923U/en not_active Expired - Fee Related
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Granted publication date: 20210316 |