CN211812684U - Pay-off rack for electric power construction - Google Patents

Pay-off rack for electric power construction Download PDF

Info

Publication number
CN211812684U
CN211812684U CN202020347829.XU CN202020347829U CN211812684U CN 211812684 U CN211812684 U CN 211812684U CN 202020347829 U CN202020347829 U CN 202020347829U CN 211812684 U CN211812684 U CN 211812684U
Authority
CN
China
Prior art keywords
cable
traction
pay
bottom plate
traction wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020347829.XU
Other languages
Chinese (zh)
Inventor
李科
王杰
徐永生
邓勇泉
李庭银
张伟
张薇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Yintong Construction Development Co ltd
Original Assignee
Chongqing Yintong Construction Development Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Yintong Construction Development Co ltd filed Critical Chongqing Yintong Construction Development Co ltd
Priority to CN202020347829.XU priority Critical patent/CN211812684U/en
Application granted granted Critical
Publication of CN211812684U publication Critical patent/CN211812684U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model relates to an electric power is pay off rack for construction, which comprises a base plate, be provided with two sets of supporting seats on the bottom plate, two supporting seats set up in bottom plate bilateral symmetry, be provided with the unwrapping wire roller that is used for bearing cable drum on the supporting seat, be provided with cable traction assembly on the bottom plate, cable traction assembly is including setting up the mounting panel on the bottom plate, be provided with two sets of traction wheels on the mounting panel, one of them traction wheel sets up directly over another traction wheel, two traction wheel lateral walls all inwards cave in and form the cable draw-in groove, set up the adjusting part that can adjust the clearance between two traction wheels on the mounting panel, be provided with drive traction wheel pivoted driving motor on the mounting panel, be provided with between driving motor and the traction wheel and drive two traction wheels to opposite. The utility model discloses a cable pulls the subassembly and replaces the manpower to carry out the unwrapping wire operation, has and uses manpower sparingly, effectively reduces the effect of unwrapping wire in-process manpower burden.

Description

Pay-off rack for electric power construction
Technical Field
The utility model belongs to the technical field of electric power construction equipment technique and specifically relates to a pay off rack is used in electric power construction.
Background
At present, with the development of economy in China and the rapid rise of the building industry, cables need to be laid during construction in various building fields, cables and cable reels need to be used due to the fact that the cables and the cable reels are heavy in weight in the laying process of the cables, general types include active and passive types, vertical types, horizontal types, shaft types and shaftless types, and various types bring certain convenience to the actual electric power construction process.
Chinese utility model patent that publication number is CN206814102U discloses a portable pay off rack is used in electric power construction, and it includes: bottom plate, support, unwrapping wire roller, grip block, support, go up straightener roller and straightener roller down, the equal fixedly connected with support in both sides of bottom plate top, the top of support is equipped with places the recess, the both ends of unwrapping wire roller are taken on the recess of placing of corresponding support, the both ends of unwrapping wire roller are equipped with circular stopper, evenly distributed has a plurality of screw hole on the unwrapping wire roller, the quantity of grip block is 2 and the spacer sleeve is established on the unwrapping wire roller, the grip block all through locking screw and the corresponding screw hole fixed connection of unwrapping wire roller, the below fixedly connected with support of bottom plate, install straightener roller on the support, install straightener roller down on the below support of going up straightener roller, go up the straightener roller and leave the clearance that supplies the cable to pass between the straightener roller down, the bottom below of bottom plate up end is equipped with the rubber layer. During the use, support all pass through the fix with screw, and the grip block passes through different screw hole fixed connection on locking screw and the unwrapping wire roller, and the clearance between last straightener roller and the straightener roller down is passed after the cable is drawn out, and under the effect of traction force, go up straightener roller and straightener roller down and carry out preliminary straightening to the cable.
The above prior art solutions have the following drawbacks: when the cable is paid off, the cable needs to be pulled manually or the cable drum needs to be rotated to pay off, and for cables with thick diameters, the labor intensity is high in the paying off process, and the manual burden is heavy.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide a pay off rack for electric power construction, it pulls the subassembly through the cable and replaces the manpower to carry out the unwrapping wire operation, uses manpower sparingly, effectively reduces the manpower burden of unwrapping wire in-process.
The above object of the present invention can be achieved by the following technical solutions:
the utility model provides an electric power construction is with pay off rack, includes the bottom plate, be provided with two sets of supporting seats on the bottom plate, two the supporting seat in bottom plate bilateral symmetry sets up, be provided with the unwrapping wire roller that is used for bearing the cable drum on the supporting seat, be provided with cable traction assembly on the bottom plate, cable traction assembly including set up in mounting panel on the bottom plate, be provided with two sets of traction wheels on the mounting panel, one of them the traction wheel sets up in another directly over the traction wheel, two the traction wheel lateral wall all inwards caves in and forms the cable clamping groove, it can be to two to set up on the mounting panel the adjusting part that the clearance was adjusted between the traction wheel, be provided with the drive on the mounting panel traction wheel pivoted driving motor, be provided with between driving motor and the traction wheel and drive assembly two the traction wheel is to.
By adopting the technical scheme, the cable drum wound with the cable is arranged on the pay-off roller, the cable is inserted between the two traction wheels, the adjusting component is adjusted, the adjusting component drives the traction wheels to move, so that the cable is clamped between cable clamping grooves of the two traction wheels, the driving motor is adjusted and started, the driving motor drives the transmission component to move, the transmission component drives the two traction wheels to rotate, the two traction wheels jointly drive the cable to move in the direction far away from the pay-off roller, and the pay-off operation of the cable wound on the cable drum is realized; the cable traction assembly of design replaces the manpower to carry out the unwrapping wire operation, uses manpower sparingly, effectively reduces the manpower burden of unwrapping wire in-process to straighten the cable in the unwrapping wire, reduce cable bending degree, the cable laying of being convenient for.
The present invention may be further configured in a preferred embodiment as: the adjusting part comprises a sliding groove which is formed in the mounting plate along the vertical direction, a sliding block is arranged in the sliding groove and penetrates through the side wall of the sliding groove, a threaded rod is connected with the sliding block in a threaded mode, the threaded rod is rotatably connected with the sliding block and can drive the sliding block to slide along the sliding groove, and the traction wheel is rotatably connected to the sliding block.
By adopting the technical scheme, force is applied to the threaded rod, so that the threaded rod rotates, the threaded rod rotates to drive the sliding block to slide along the sliding groove, and the sliding block drives the traction wheels to move, so that the size of a gap between the two traction wheels is adjusted; the adjusting part of design is adjusted the clearance size between two traction wheels, can be with the cable chucking of different diameter specifications between two traction wheels, and the traction wheel of being convenient for pulls the cable, simple structure, and the practicality is strong.
The present invention may be further configured in a preferred embodiment as: the transmission assembly is connected including setting up worm wheel on the traction wheel and rotation worm on the mounting panel, be provided with two sets of helical tooth on the worm, two helical tooth spiral opposite direction, two the helical tooth respectively with two the worm wheel meshing, the worm pass through the shaft coupling with driving motor's output shaft.
By adopting the technical scheme, the driving motor is adjusted and started, the output shaft of the driving motor drives the worm to rotate, the worm drives the two groups of spiral teeth to rotate, the two groups of spiral teeth respectively drive the worm wheels meshed with the spiral teeth to rotate, and the two groups of worm wheels drive the two groups of traction wheels to rotate in opposite directions so as to jointly traction the cable; the transmission assembly of design for two sets of traction wheel combined action pulls the cable, effectively strengthens traction effect, convenient to use.
The present invention may be further configured in a preferred embodiment as: the length of the spiral teeth meshed with the worm wheel connected to the sliding block is not less than the length of the sliding groove.
Through adopting above-mentioned technical scheme, the helical tooth of design for the worm wheel of connecting on the slider slides the in-process with the helical tooth meshing all the time at the slider, avoids adjusting part to adjust and produces the interference to the transmission of drive assembly, guarantees transmission effect.
The present invention may be further configured in a preferred embodiment as: the bottom plate is provided with a lead ring, and the lead ring can adjust the angle of the cable inserted into the cable traction assembly.
Through adopting above-mentioned technical scheme, the angle that the cable got into before the cable pulls the subassembly is adjusted to the lead wire ring of design, avoids the cable to get into the too big cable slot that breaks away from the traction wheel of angle, guarantees the traction effect of traction wheel.
The present invention may be further configured in a preferred embodiment as: the last cover of unwrapping wire roller is equipped with two sets of can carry out spacing collars to the cable drum, the spacing collar be close to cable drum one side set up a plurality of can with the cable drum on the angle steel complex recess of pegging graft, evenly set up a plurality of screw holes along unwrapping wire roller axis direction on the unwrapping wire roller, run through the spacing collar lateral wall be provided with can with screw hole screw-thread fit's locking bolt.
By adopting the technical scheme, after the pay-off roller is inserted into the mounting hole in the middle of the cable drum, the limiting ring is moved to be sleeved on the pay-off roller, the limiting ring is adjusted to enable the groove to be in inserting fit with angle steel on the cable drum, the locking bolt is adjusted to enable the locking bolt to be screwed into the threaded hole to fix the limiting ring, and then the limiting of the cable drum is realized; the spacing ring of design for cable drum and unwrapping wire roller realize indirect fixed, avoid the cable drum to slide on the unwrapping wire roller, simultaneously, during making the unwrapping wire operation, the cable drum can rotate with the unwrapping wire roller is synchronous, avoids the frictional force between cable drum and the unwrapping wire roller to rotate the cable drum and causes the influence.
The present invention may be further configured in a preferred embodiment as: the bearing is arranged at two ends of the pay-off roller, the pay-off roller is inserted into the bearing inner ring, and a bearing seat for clamping the bearing is arranged at the top of the supporting seat.
Through adopting above-mentioned technical scheme, the bearing of design, the unwrapping wire roller of being convenient for rotates, reduces the cable and draws the resistance that the subassembly need overcome when drawing the cable, and the cable of being convenient for draws the subassembly and draws the cable.
The present invention may be further configured in a preferred embodiment as: and a limiting key is arranged on the inner wall of the bearing inner ring, and a key groove matched with the limiting key in an inserting manner is formed in the end part of the pay-off roller.
Through adopting above-mentioned technical scheme, the bearing dismouting of being convenient for is realized to the spacing key and the keyway of design, and then promotes the installation effectiveness of cable drum, and the practicality is strong.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the designed cable traction assembly replaces manpower to perform paying-off operation, so that the manpower is saved, the manpower burden in the paying-off process is effectively reduced, the cable is straightened while paying-off, the bending degree of the cable is reduced, and the cable is convenient to lay;
2. the designed adjusting assembly is used for adjusting the size of the gap between the two traction wheels, and cables with different diameters can be clamped between the two traction wheels, so that the traction wheels can conveniently pull the cables, and the cable pulling device is simple in structure and high in practicability;
3. the transmission assembly of design for two sets of traction wheel combined action pulls the cable, effectively strengthens traction effect, convenient to use.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a partially enlarged schematic view of a portion a in fig. 1, and is intended to show a specific structure of the cable pulling assembly.
FIG. 3 is an enlarged partial schematic view of portion B of FIG. 1; aims to show the connection relationship between the pay-off roller and the bearing.
In the figure, 1, a bottom plate; 2. a supporting seat; 21. a bearing seat; 3. a pay-off roller; 31. a threaded hole; 32. a limiting ring; 321. a groove; 33. locking the bolt; 34. a bearing; 341. a limiting key; 35. a keyway; 4. a cable pulling assembly; 41. mounting a plate; 42. a traction wheel; 5. an adjustment assembly; 51. a chute; 52. a slider; 53. a threaded rod; 6. a drive motor; 7. a transmission assembly; 71. a worm gear; 72. a worm; 721. helical teeth; 722. a coupling; 8. and a wire loop.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a pay off rack for electric power construction, including bottom plate 1, install supporting seat 2 and cable traction assembly 4 on the bottom plate 1. The supporting seat 2 is provided with two sets of, and in the setting of 1 bilateral symmetry of bottom plate, installs the unwrapping wire roller 3 that is used for bearing the cable drum on the supporting seat 2. And a lead ring 8 is further installed on the bottom plate 1, and the lead ring 8 can adjust the angle of the cable inserted into the cable traction assembly 4.
Referring to fig. 2, the cable traction assembly 4 includes a mounting plate 41 fixed on the bottom plate 1 by bolts, two sets of traction wheels 42 are installed on the mounting plate 41, one of the traction wheels 42 is disposed directly above the other traction wheel 42, the side walls of the two traction wheels 42 are both recessed inwards to form a cable slot, an adjusting assembly 5 capable of adjusting the gap between the two traction wheels 42 is disposed on the mounting plate 41, a driving motor 6 for driving the traction wheels 42 to rotate is fixed on the mounting plate 41 by bolts, and a transmission assembly 7 for driving the two traction wheels 42 to rotate in opposite directions is disposed between the driving motor 6 and the traction wheels 42.
Referring to fig. 2, the adjusting assembly 5 includes a sliding groove 51 formed in the mounting plate 41 along the vertical direction, a sliding block 52 is installed in the sliding groove 51, a threaded rod 53 is connected to a side wall of the sliding groove 51 through a thread, the threaded rod 53 is rotatably connected to the sliding block 52 and can drive the sliding block 52 to slide along the sliding groove 51, and the traction wheel 42 located above is rotatably connected to the sliding block 52. The transmission assembly 7 comprises a worm wheel 71 fixedly connected to the traction wheel 42 and a worm 72 rotatably connected to the mounting plate 41, wherein the worm 72 is connected with an output shaft of the driving motor 6 through a coupling 722. Two sets of spiral teeth 721 are integrally arranged on the worm 72, the spiral directions of the two spiral teeth 721 are opposite, the two spiral teeth 721 are respectively meshed with the two worm wheels 71, and the length of the spiral teeth 721 meshed with the upper worm wheel 71 is not less than the length of the sliding chute 51.
Referring to fig. 3, the cover is equipped with two sets of spacing rings 32 that can carry out spacing to the cable drum on the unwrapping wire roller 3, and spacing ring 32 is close to cable drum one side and has seted up a plurality of can with cable drum on the angle steel complex recess 321 that pegs graft, evenly has seted up a plurality of screw holes 31 along unwrapping wire roller 3 axis direction on the unwrapping wire roller 3, runs through spacing ring 32 lateral wall and installs can with screw hole 31 screw-thread fit's locking bolt 33. The two ends of the pay-off roller 3 are provided with bearings 34, the inner wall of the inner ring of the bearing 34 is welded with a limiting key 341, the end part of the pay-off roller 3 is provided with a key groove 35 which can be matched with the limiting key 341 in an inserting manner, and the pay-off roller 3 is inserted into the inner ring of the bearing 34. The top of the supporting seat 2 is provided with a bearing seat 21 for clamping the bearing 34.
The implementation principle of the embodiment is as follows: and lifting the pay-off roller 3, taking down the bearing 34 and the limiting ring 32 on one side of the pay-off roller 3, and inserting the pay-off roller 3 into the mounting hole in the middle of the cable reel. Afterwards, remove spacing ring 32 for spacing ring 32 cup joints on unwrapping wire roller 3, adjusts the spacing ring 32 of both sides, makes recess 321 and the angle steel grafting cooperation on the cable drum, adjusts locking bolt 33, makes locking bolt 33 screw in screw hole 31 in, fixes spacing ring 32, and then realizes the spacing to the cable drum. The bearing 34 detached before installation moves the pay-off roll 3 so that the bearings 34 on both sides of the pay-off roll 3 are engaged in the bearing housing 21, and the cable is inserted between the two traction wheels 42 through the lead ring 8. To threaded rod 53 application of force for threaded rod 53 rotates, and threaded rod 53 rotates and drives slider 52 and slide along spout 51, and slider 52 drives the traction wheel 42 removal of top, adjusts the clearance size between two traction wheels 42, makes the cable joint between the cable draw-in groove of two traction wheels 42. Adjusting the driving motor 6, the driving motor 6 is started, the output shaft of the driving motor 6 drives the worm 72 to rotate, the worm 72 drives the two groups of spiral teeth 721 to rotate, the two groups of spiral teeth 721 respectively drive the worm wheels 71 meshed with the spiral teeth to rotate, the two groups of worm wheels 71 drive the two groups of traction wheels 42 to rotate in opposite directions, and the two traction wheels 42 jointly act on the traction cable to move towards the direction far away from the pay-off roller 3 so as to pay off the cable wound on the cable reel.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a pay off rack for electric power construction, includes bottom plate (1), be provided with two sets of supporting seats (2) on bottom plate (1), two supporting seat (2) in bottom plate (1) bilateral symmetry sets up, be provided with on supporting seat (2) and be used for bearing cable drum's unwrapping wire roller (3), its characterized in that: be provided with cable traction assembly (4) on bottom plate (1), cable traction assembly (4) including set up in mounting panel (41) on bottom plate (1), be provided with two sets of traction wheels (42) on mounting panel (41), one of them traction wheel (42) set up in another directly over traction wheel (42), two traction wheel (42) lateral wall all inwards caves in and forms the cable draw-in groove, it can be to two to set up on mounting panel (41) adjustment assembly (5) that the clearance was adjusted between traction wheel (42), be provided with the drive on mounting panel (41) traction wheel (42) pivoted driving motor (6), be provided with between driving motor (6) and traction wheel (42) and drive assembly (7) that traction wheel (42) rotated to opposite direction.
2. The pay-off rack for power construction according to claim 1, characterized in that: adjusting part (5) include in spout (51) that the vertical direction was seted up are followed on mounting panel (41), be provided with slider (52) in spout (51), run through spout (51) lateral wall threaded connection has threaded rod (53), threaded rod (53) are rotated with slider (52) and are connected, and can drive slider (52) slide along spout (51), one traction wheel (42) rotate to be connected on slider (52).
3. The pay-off rack for power construction according to claim 2, characterized in that: drive assembly (7) are including setting up worm wheel (71) on traction wheel (42) are connected with rotating worm (72) on mounting panel (41), be provided with two sets of helical tooth (721) on worm (72), two helical tooth (721) spiral direction is opposite, two helical tooth (721) respectively with two worm wheel (71) meshing, worm (72) through shaft coupling (722) with driving motor (6)'s output shaft.
4. The pay-off rack for power construction according to claim 3, characterized in that: the length of the spiral teeth (721) engaged with the worm wheel (71) connected to the sliding block (52) is not less than the length of the sliding groove (51).
5. The pay-off rack for power construction according to claim 1, characterized in that: the cable traction assembly is characterized in that a lead ring (8) is arranged on the bottom plate (1), and the angle of the cable inserted into the cable traction assembly (4) can be adjusted by the lead ring (8).
6. The pay-off rack for power construction according to claim 1, characterized in that: it can carry out spacing ring (32) to the cable drum to overlap on unwrapping wire roller (3), spacing ring (32) are close to cable drum one side and have been seted up a plurality of can with cable drum angle steel grafting complex recess (321), evenly seted up a plurality of screw holes (31) along unwrapping wire roller (3) axis direction on unwrapping wire roller (3), run through spacing ring (32) lateral wall be provided with can with screw hole (31) screw-thread fit's locking bolt (33).
7. The pay-off rack for power construction according to claim 6, characterized in that: bearings (34) are arranged at two ends of the pay-off roller (3), the pay-off roller (3) is inserted into the inner ring of the bearing (34), and a bearing seat (21) for clamping the bearing (34) is arranged at the top of the supporting seat (2).
8. The pay-off rack for power construction according to claim 7, characterized in that: and a limiting key (341) is arranged on the inner wall of the inner ring of the bearing (34), and a key groove (35) which is in plug-in fit with the limiting key (341) is formed in the end part of the pay-off roller (3).
CN202020347829.XU 2020-03-18 2020-03-18 Pay-off rack for electric power construction Active CN211812684U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020347829.XU CN211812684U (en) 2020-03-18 2020-03-18 Pay-off rack for electric power construction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020347829.XU CN211812684U (en) 2020-03-18 2020-03-18 Pay-off rack for electric power construction

Publications (1)

Publication Number Publication Date
CN211812684U true CN211812684U (en) 2020-10-30

Family

ID=73011543

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020347829.XU Active CN211812684U (en) 2020-03-18 2020-03-18 Pay-off rack for electric power construction

Country Status (1)

Country Link
CN (1) CN211812684U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112332315A (en) * 2020-11-25 2021-02-05 北京恒扉嘉泰建设工程有限公司 Cable paying-off device and construction process thereof
CN113161923A (en) * 2021-04-25 2021-07-23 湖南华鑫美好公路环境建设有限公司 Novel adjustable bridge cable laying system and laying method
CN113443504A (en) * 2021-06-18 2021-09-28 河南拓宇电力有限公司 Cable construction device of cable well and construction method thereof
CN113772480A (en) * 2021-09-18 2021-12-10 国网河南省电力公司镇平县供电公司 Cable pay-off device
CN113860061A (en) * 2021-11-03 2021-12-31 欧耐特线缆集团有限公司 Paying-off device and method for green and environment-friendly cable production

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112332315A (en) * 2020-11-25 2021-02-05 北京恒扉嘉泰建设工程有限公司 Cable paying-off device and construction process thereof
CN113161923A (en) * 2021-04-25 2021-07-23 湖南华鑫美好公路环境建设有限公司 Novel adjustable bridge cable laying system and laying method
CN113443504A (en) * 2021-06-18 2021-09-28 河南拓宇电力有限公司 Cable construction device of cable well and construction method thereof
CN113772480A (en) * 2021-09-18 2021-12-10 国网河南省电力公司镇平县供电公司 Cable pay-off device
CN113860061A (en) * 2021-11-03 2021-12-31 欧耐特线缆集团有限公司 Paying-off device and method for green and environment-friendly cable production

Similar Documents

Publication Publication Date Title
CN211812684U (en) Pay-off rack for electric power construction
CN110061451B (en) Cable pay-off is used in electric power construction
CN110745649B (en) Cable paying-off equipment
CN110707603B (en) Cable laying device for communication engineering
CN112103842B (en) Cable laying device for cable trench
CN210608313U (en) Cable laying auxiliary device
CN111675045A (en) Automatic cable coiling machine
CN209591662U (en) Stranding machine
EP3883076A1 (en) Reel device for charging cable
CN210528090U (en) Supporting shaft bracket for cable drum
CN111416303A (en) Power engineering cable laying method and stranding and grinding machine for laying
CN212127063U (en) Power cable winding device
CN113338063A (en) Production and manufacturing process of unbonded steel strand
CN217920825U (en) Electric wire and cable pay-off rack
CN214087113U (en) Fixing device of cable irradiation wire winding chuck
CN215755700U (en) Unwrapping wire support with direction function
CN218024649U (en) Movable automatic coiling device for cabling assembly part
JP4248668B2 (en) Method for laying wire rod and spiral wire feeding device used therefor
CN214692728U (en) Cable drum support frame
CN216997022U (en) Wire coiling and paying-off device capable of preventing wire disorder
CN210795283U (en) Pay-off is used in cable laying
CN214673974U (en) Threading construction device for building electrical engineering
CN217522480U (en) Quick laying device of electric wire
CN214379751U (en) Cable construction draw gear
CN209871931U (en) Cable reel rotating device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant