CN211081753U - Self-locking deep hole drilling clamp - Google Patents
Self-locking deep hole drilling clamp Download PDFInfo
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- CN211081753U CN211081753U CN201922134266.6U CN201922134266U CN211081753U CN 211081753 U CN211081753 U CN 211081753U CN 201922134266 U CN201922134266 U CN 201922134266U CN 211081753 U CN211081753 U CN 211081753U
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Abstract
A self-locking deep hole drilling clamp comprises a frame body, a left slip seat, a left slip, a right slip and a right slip seat; the frame body consists of an upper frame plate, a lower frame plate, a left vertical blocking plate, a right vertical blocking plate, a front side plate and a rear side plate, the left vertical blocking plate, the right vertical blocking plate, the front side plate and the rear side plate are connected end to form an outer frame, the upper frame plate and the lower frame plate are respectively arranged at the top and the bottom of the outer frame, and bolts are arranged at four corners of the lower frame plate; the left slip seat, the right slip seat, the left slip and the right slip are all positioned in an inner cavity of the outer frame, and a cavity for a drill rod or a sleeve to pass (clamp) is enclosed between the left slip and the right slip; the front side plate is provided with a treading lifting mechanism for lifting the left slip seat and the right slip seat upwards at the same time, and when the left slip seat drives the left slip and the right slip seat drives the right slip to move upwards at the same time, the cavity is automatically enlarged, otherwise, the cavity is reduced. The utility model has strong self-locking and automatic compensation wearability, more fastening clamping, avoiding the occurrence of drilling accidents; the diameter range of the clamped pipe is large; the service life is long; the method is suitable for drilling construction of straight holes and inclined holes, and has strong universality.
Description
Technical Field
The utility model relates to a probing must possess the machines in the probing construction, more specifically says, is a self-locking type deep hole drilling holder who is used for centre gripping drilling rod or sheathed tube.
Background
At present, there are two main types of grippers on the market:
the clamp holder for the wooden horse mainly comprises an eccentric seat, a shaft, a slip, a connecting rod, a crank and the like, wherein when a drill rod is clamped, the two eccentric seats with oval vertical heads respectively rotate downwards along the supporting points of the two eccentric seats, so that the slip is pushed forwards to clamp the drill rod; the slip and the elliptical vertical head are further driven to move downwards under the action of the self weight of the drill rod, so that the drill rod is heavier and is clamped tighter, when the drill rod is loosened, the pedal of the eccentric seat is stepped on by a foot while the drill rod column is lifted, the eccentric seat upwards rotates around the fulcrum of the eccentric seat, and the slip and the drill rod are loosened.
The other type is a hydraulic clamper, which mainly adopts a structure of spring clamping and hydraulic releasing. The holder consists of slips, a left slip seat, a right slip seat, a return spring, a piston, a pull rod, a disc spring and the like. The disc spring is loaded with a certain pre-pressure, one end of the disc spring pushes the left slip seat through the pull rod, the other end of the disc spring is propped against the hydraulic cylinder body, and the hydraulic cylinder body pulls the right slip seat through the connecting rod bolt to enable the two slip seats to move relatively towards the center to clamp the drill rod; when the hydraulic cylinder is filled with pressure oil, the piston and the cylinder body move relatively and compress the disc spring through the pull rod to loosen the slip seat, and meanwhile, the slip is forced to loosen the drill rod by the return spring between the slip seats.
The disadvantages of the above-mentioned hobbyhorse holder are: only straight holes can be drilled, and the universality is insufficient; the hydraulic clamp holder is influenced by hydraulic pressure, and the phenomena of insufficient clamping force, drill running and the like can occur along with the increase of the weight of the drill rod deepened by drilling.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a self-locking type deep hole creeps into holder, its overall stability is good, and the commonality is strong, has self-locking function, security when can fully improve the construction.
The technical solution of the utility model is to provide a self-locking deep hole drilling clamper with the following structure, which comprises a frame body, a left slip seat, a left slip, a right slip and a right slip seat; the frame body consists of an upper frame plate, a lower frame plate, a left vertical blocking plate, a right vertical blocking plate, a front side plate and a rear side plate, the left vertical blocking plate, the front side plate, the right vertical blocking plate and the rear side plate are connected end to form an outer frame, the upper frame plate and the lower frame plate are respectively arranged at the top and the bottom of the outer frame, the upper frame plate and the lower frame plate are respectively provided with a long through hole, so that the upper frame plate and the lower frame plate form a rectangular frame structure, and four corners of the lower frame plate are respectively provided with a bolt; the left slip seat, the left slip, the right slip and the right slip seat are all located in an inner cavity of the outer frame, the left slip seat and the left slip are located on the left side of the inner cavity, the right slip and the right slip seat are located on the right side of the inner cavity, the left end of the left slip seat is connected with the left blocking vertical plate in a vertical sliding mode, the right end of the left slip seat is connected with the left end of the left slip, a cavity for a drill rod or a sleeve to pass through is formed between the right end of the left slip and the left end of the right slip, the right end of the right slip is connected with the left end of the right slip seat, and the right end of the right slip seat is connected with the right blocking vertical plate in a vertical sliding; when the left slip seat drives the left slip and the right slip seat drives the right slip to move upwards simultaneously, the cavity between the left slip and the right slip is automatically enlarged, otherwise, the cavity is automatically reduced; and the front side plate is provided with a treading lifting mechanism for simultaneously lifting the left slip seat and the right slip seat upwards.
From lock type deep hole creep into holder, wherein, sliding connection about right-hand member and the stifled riser of right side slip seat indicates, the right side of right side slip seat is equipped with the inclined plane from left side down tilt right, the stifled riser in the right side is from left side down tilt right to laminate mutually with the inclined plane on right slip seat right side, both sides all are equipped with right guide way around the slip seat in the right side, the right part of preceding curb plate and posterior lateral plate all is equipped with the right gib block that is used for inserting right guide way.
From lock type deep hole creep into holder, wherein, right grinding plate is equipped with on the left surface of the stifled riser in the right side, a plurality of right bearing gyro wheels are equipped with from the top down in proper order on the right side inclined plane of right side slip seat, right bearing gyro wheel all laminates on right grinding plate.
From lock type deep hole creep into holder, wherein, left end and the stifled riser of a left side slip bowl from top to bottom sliding connection mean, the left side of left side slip bowl is equipped with the inclined plane of slope left from the lower right side, stifled riser in a left side is from the lower right side slope left to laminate mutually with the left inclined plane of left slip bowl, both sides all are equipped with left guide way around the left side slip bowl, the left part of preceding curb plate and posterior lateral plate all is equipped with the left gib block that is used for inserting left guide way.
From lock type deep hole creep into holder, wherein, left grinding plate is equipped with on the right flank of stifled riser in a left side, a plurality of left bearing gyro wheels are equipped with from the top down in proper order on the left side inclined plane of left side slip seat, left bearing gyro wheel all laminates on left grinding plate.
From lock deep hole creep into holder, wherein, trample hoist mechanism and include extension board, pedal axle, pedal pole, pedal hook board and layer board, the layer board is all equipped with to the bottom of stifled riser in a left side and the stifled riser in the right side, the layer board supports on the bottom surface of left slip seat and right slip seat, the laminating of pedal hook board is in the bottom of left slip seat and right slip seat, and adorns on pedal pole, pedal pole dress is on pedal axle, the tip dress of pedal axle is on the extension board, extension board fixed mounting is on the curb plate in the front.
From lock deep hole creep into holder, wherein, the alloy piece has all been inlayed to the arc intracavity of left slips right-hand member and the arc intracavity of right slips left end.
Self-locking type deep hole creep into holder, wherein, the bail is all equipped with at the top of left side slip seat and right slip seat.
From lock deep hole creep into holder, wherein, the left side inclined plane of left side slip bowl and the right side inclined plane of right slip bowl all be 80 with the contained angle between the horizontal plane.
After the structure more than adopting, compare with prior art, the utility model discloses self-locking type deep hole creeps into holder has following advantage: the utility model improves the structure of the prior deep hole drilling holder, and when in use, the lifting mechanism is treaded by feet, thereby driving the left slip seat, the left slip, the right slip and the right slip seat to move upwards together, and rapidly opening the cavity between the left slip and the right slip so as to lead a drill rod or a sleeve to pass smoothly; when the drill rod or the casing pipe reaches a preset position, the treading lifting mechanism is loosened, the left slip seat, the left slip, the right slip and the right slip seat slide down quickly by means of self gravity, the drill rod or the casing pipe is clamped by the left slip and the right slip, and the operation process of loosening and clamping is completed once. The frame body consisting of the upper frame plate, the lower frame plate, the left vertical blocking plate, the right vertical blocking plate, the front side plate and the rear side plate has stronger overall stability, safe and reliable work in a production test and greatly guaranteed construction safety; the sleeve or the drill rod is clamped by the left slip seat, the left slip, the right slip seat and the right slip under the action of the self-weight, and the self-weight of the sleeve or the drill rod is added, so that a clamped piece does not rotate and slip off during working, the clamping is firmer, the clamping success rate reaches 100%, and the clamping self-locking performance is strong; through twisting the bolt of framework bottom edge department down, make the utility model discloses an inclination is unanimous with the angle of creeping into the inclined hole, reaches the purpose that can creep into the inclined hole, strengthens the commonality.
Drawings
FIG. 1 is a front view semi-section structure diagram of the self-locking deep hole drilling clamp of the utility model;
fig. 2 is a top view structural diagram of the self-locking deep hole drilling clamp of the present invention.
Detailed Description
The self-locking deep hole drilling clamp of the invention is further described in detail with reference to the accompanying drawings and the specific implementation mode:
as shown in fig. 1 and 2, in the present embodiment, the self-locking deep hole drilling gripper of the present invention includes a frame body, a left slip seat 26, a left slip 25, a right slip 13, and a right slip seat 14. The frame body is composed of an upper frame plate 11, a lower frame plate 18, a left vertical blocking plate, a right vertical blocking plate 16, a front side plate 23 and a rear side plate. The wall thicknesses of the left vertical blocking plate, the front side plate 23, the right vertical blocking plate 16 and the rear side plate are all 25mm, and the left vertical blocking plate, the front side plate, the right vertical blocking plate and the rear side plate are connected end to end in a welding mode to form an outer frame. The upper frame plate 11 and the lower frame plate 18 are respectively welded and installed at the top and the bottom of the outer frame, and a long through hole 111 is formed on each of the upper frame plate 11 and the lower frame plate 18, so that the upper frame plate 11 and the lower frame plate 18 form a rectangular frame structure. When the upper frame plate 11, the lower frame plate 18, the left vertical blocking plate, the right vertical blocking plate 16, the front side plate 23 and the rear side plate are welded into a whole, the frame is firm, firm and stable.
Four edges of lower frame plate 18 all are equipped with a bolt, through the height of adjusting these four bolts, can make the utility model discloses an inclination keeps unanimous with the angle of creeping into the inclined hole, and then reaches the purpose of creeping into the inclined hole, reinforcing commonality.
The left slip bowl 26, the left slip 25, the right slip 13 and the right slip bowl 14 are all located in the inner cavity of the outer frame, the left slip bowl 26 and the left slip 25 are located on the left side of the inner cavity, and the right slip bowl 13 and the right slip bowl 14 are located on the right side of the inner cavity. Sliding connection about left slips seat 26's left end and the stifled riser of left side, left slips seat 26's right-hand member passes through the screw to be connected with left slips 25 left end, encloses the cavity 53 that supplies drilling rod or sleeve pipe to pass through between left slips 25's right-hand member and the left end of right slips 13, and right slips 13 right-hand member passes through the screw to be connected with the left end of right slips seat 14, and right-hand member and the stifled riser 16 of right slips seat 14 are sliding connection about. The left slip 25 and the right slip 13 are both integral steel castings, and are connected with the left slip seat 26 and the right slip seat 14 respectively, so that the strength is stronger.
The front side plate 23 is provided with a treading lifting mechanism for simultaneously lifting the left slip bowl 26 and the right slip bowl 14 upwards. When the left slip bowl 26 carries the left slip 25 and the right slip bowl 14 carries the right slip 13 and moves upwards at the same time, the cavity 53 between the left slip 25 and the right slip 13 automatically increases and vice versa automatically decreases.
The right end of the right slip seat 14 is connected with the right blocking vertical plate 16 in a vertical sliding manner, and the structure is as follows: the right side of the right slip seat 14 is provided with an inclined plane which inclines from left to bottom and right to top, and the right blocking vertical plate 16 inclines from left to bottom and right to top and is attached to the inclined plane on the right side of the right slip seat 14; the front and back sides of the right slip bowl 14 are provided with right guide grooves 141, and the right parts of the front side plate 23 and the back side plate are provided with right guide strips for inserting into the right guide grooves 141.
The left end of the left slip seat 26 is connected with the left blocking vertical plate in a vertical sliding manner, and the structure is as follows: the left side of the left slip seat 26 is provided with an inclined plane which inclines upwards from the right bottom to the left, and the left blocking vertical plate inclines upwards from the right bottom to the left and is attached to the inclined plane on the left side of the left slip seat 26; both sides all are equipped with left guide way 261 around the left slip seat 26, and the left part of preceding curb plate 23 and posterior lateral plate all is equipped with the left gib block that is used for inserting in left guide way 261.
The left inclined surface of the left slip bowl 26 and the right inclined surface of the right slip bowl 14 both form an angle of 80 ° with the horizontal plane. The inclined angle has the function of automatic centering, so that the abrasion is compensated in time.
The right side of the left blocking vertical plate is provided with a left grinding plate, a plurality of left bearing rollers are sequentially arranged on the left inclined plane of the left slip seat 26 from top to bottom, and the left bearing rollers are attached to the left grinding plate. The left side surface of the right vertical blocking plate 16 is provided with a right grinding plate 17, a plurality of right bearing rollers 15 are sequentially arranged on the right inclined surface of the right slip seat 14 from top to bottom, and the right bearing rollers 15 are attached to the right grinding plate 17. The arrangement of the bearing roller and the grinding plate can effectively reduce friction force, realize smooth up-and-down sliding of the slip driven by the slip seat, and complete the functions of self-locking and automatic aligning. The design of the guide groove and the guide strip can lead the slip seat to drive the slip to freely move up and down and to work stably, thus realizing the self-locking performance of clamping and preventing deflection.
Alloy blocks 24 are inlaid in the arc-shaped cavity at the right end of the left slip 25 and the arc-shaped cavity at the left end of the right slip 13, so that the clamping piece is further prevented from rotating and slipping off, the clamping is firmer, and the clamping success rate is fully improved. In addition, the alloy blocks 24 are arranged, so that the strength and the hardness of the slip are improved, and the service life is prolonged.
The lifting rings 12 are arranged at the tops of the left slip seat 26 and the right slip seat 14, and assembly is convenient.
The treading lifting mechanism comprises a support plate 22, a treading shaft 20, a treading rod 21, a treading hook plate and a supporting plate 19. The bottom parts of the left vertical blocking plate and the right vertical blocking plate 16 are both provided with a supporting plate 19, and the supporting plate 19 is supported on the bottom surfaces of the left slip seat 26 and the right slip seat 14; the pedal hook plate is attached to the bottoms of the left slip seat 26 and the right slip seat 14 and is arranged on the pedal rod 21; the rear part of the pedal lever 21 is mounted on the pedal shaft 20, the end part of the pedal shaft 20 is mounted on the stay 22, and the stay 22 is fixedly mounted on the front side plate 23.
When the tool is used, the left slip seat 26, the left slip 25, the right slip 13 and the right slip seat 14 move upwards together by pressing the treading lifting mechanism with feet, and a cavity 53 between the left slip and the right slip is rapidly opened under the action of the inclined plane, the guide groove and the guide strip, so that a drill rod or a casing can be smoothly inserted; when the drill pipe or the casing pipe reaches a preset position, the treading lifting mechanism is loosened, the left slip seat 26, the left slip 25, the right slip 13 and the right slip seat 14 slide down quickly by means of self gravity, the drill pipe or the casing pipe is clamped by the left slip and the right slip, self-locking of clamping is achieved, and the operation process of loosening and clamping is completed once. Compared with a Trojan horse holder with an eccentric structure, the utility model avoids the occurrence of drilling accidents caused by insufficient holding force, and the success rate of holding reaches 100%; meanwhile, the hydraulic clamp holder is influenced by hydraulic pressure, and the phenomena of insufficient clamping force, drill running and the like can occur along with the increase of the weight of the drill rod deepened by drilling.
The utility model discloses in the construction of creeping into for promote, transfer drilling rod (post) or sleeve pipe, play the effect to its firm centre gripping of stability. In the drilling construction process, when a drill rod (sleeve) needs to be lowered or lifted, the screwing-off and the installation work of the drill rod (sleeve) are completed through the clamping or loosening of the utility model; the slips of different specifications can be replaced to clamp drill rods or sleeves of different specifications, and the universality is enhanced. The reasonable structural design of the utility model has simple integral structure, easy operation, time and labor saving and improved construction efficiency; the drill is suitable for drilling straight holes or inclined holes, and the universality is realized; the weight is suitable, the dislocation movement is not easy, the overall stability is good, and the safety guarantee of construction is improved.
The above-mentioned embodiments are only described for the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and the technical solution of the present invention is not limited by the above-mentioned embodiments, and various modifications and improvements made by those skilled in the art can be made without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a self-locking type deep hole drilling holder which characterized in that: comprises a frame body, a left slip seat (26), a left slip (25), a right slip (13) and a right slip seat (14);
the frame body consists of an upper frame plate (11), a lower frame plate (18), a left vertical blocking plate, a right vertical blocking plate (16), a front side plate (23) and a rear side plate, the left vertical blocking plate, the front side plate (23), the right vertical blocking plate (16) and the rear side plate are connected end to form an outer frame, the upper frame plate (11) and the lower frame plate (18) are respectively arranged at the top and the bottom of the outer frame, the upper frame plate (11) and the lower frame plate (18) are respectively provided with a long through hole (111), so that the upper frame plate (11) and the lower frame plate (18) form a rectangular frame structure, and four corners of the lower frame plate (18) are respectively provided with a bolt;
the left slip seat (26), the left slip (25), the right slip (13) and the right slip seat (14) are located in an inner cavity of the outer frame, the left slip seat (26) and the left slip (25) are located on the left side of the inner cavity, the right slip (13) and the right slip seat (14) are located on the right side of the inner cavity, the left end of the left slip seat (26) is connected with the left plugging plate in a vertical sliding mode, the right end of the left slip seat (26) is connected with the left end of the left slip (25), a cavity (53) for a drill rod or a sleeve to pass through is enclosed between the right end of the left slip seat (25) and the left end of the right slip seat (13), the right end of the right slip seat (13) is connected with the left end of the right slip seat (14), and the right end of the right slip seat (14) is connected with the right plugging plate (16) in a vertical sliding mode;
when the left slip seat (26) drives the left slip (25) and the right slip seat (14) drives the right slip (13) to move upwards simultaneously, a cavity (53) between the left slip (25) and the right slip (13) is automatically enlarged, and otherwise, the cavity is automatically reduced;
and the front side plate (23) is provided with a treading lifting mechanism for simultaneously lifting the left slip seat (26) and the right slip seat (14) upwards.
2. The self-locking deep hole drilling holder of claim 1, wherein: the right-hand member of right side slip seat (14) and the right side are stifled riser (16) and are gone up sliding connection and mean down, the right side of right side slip seat (14) is equipped with the inclined plane of slope from left side down to the upper right slope, right side is stifled riser (16) and is laminated mutually from left side down to the upper right slope to the inclined plane on right side slip seat (14), both sides all are equipped with right guide way (141) around right side slip seat (14), the right part of preceding curb plate (23) and posterior lateral plate all is equipped with the right gib block that is used for inserting in right guide way (141).
3. The self-locking deep hole drilling holder according to claim 2, wherein: the right side of the right blocking vertical plate (16) is provided with a right grinding plate (17), a plurality of right bearing rollers (15) are sequentially arranged on the right side inclined plane of the right slip seat (14) from top to bottom, and the right bearing rollers (15) are attached to the right grinding plate (17).
4. The self-locking deep hole drilling holder of claim 1, wherein: sliding connection means about the left end of left side slip seat (26) and the stifled riser in a left side, the left side of left side slip seat (26) is equipped with the inclined plane that slopes left from the lower right side, stifled riser in a left side is from the lower right side slope left side to with the left inclined plane of left slip seat (26) laminate mutually, both sides all are equipped with left guide way (261) around left side slip seat (26), the left part of preceding curb plate (23) and posterior lateral plate all is equipped with the left gib block that is used for inserting in left guide way (261).
5. The self-locking deep hole drilling holder of claim 4, wherein: the right side surface of the left blocking vertical plate is provided with a left grinding plate, a plurality of left bearing rollers are sequentially arranged on the left inclined surface of the left slip seat (26) from top to bottom, and the left bearing rollers are attached to the left grinding plate.
6. A self-locking deep hole drilling holder according to any one of claims 1 to 5, wherein: the trampling lifting mechanism comprises a support plate (22), a trampling shaft (20), a trampling rod (21), a trampling hook plate and a support plate (19), wherein the support plate (19) is arranged at the bottom of each of a left blocking vertical plate and a right blocking vertical plate (16), the support plate (19) is supported on the bottom surfaces of a left slip seat (26) and a right slip seat (14), the trampling hook plate is attached to the bottom of the left slip seat (26) and the bottom of the right slip seat (14) and is arranged on the trampling rod (21), the trampling rod (21) is arranged on the trampling shaft (20), the end part of the trampling shaft (20) is arranged on the support plate (22), and the support plate (22) is fixedly arranged on a front side plate (23).
7. The self-locking deep hole drilling holder of claim 6, wherein: alloy blocks (24) are embedded in the arc-shaped cavity at the right end of the left slip (25) and the arc-shaped cavity at the left end of the right slip (13).
8. The self-locking deep hole drilling holder of claim 7, wherein: the top parts of the left slip seat (26) and the right slip seat (14) are provided with lifting rings (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922134266.6U CN211081753U (en) | 2019-12-03 | 2019-12-03 | Self-locking deep hole drilling clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922134266.6U CN211081753U (en) | 2019-12-03 | 2019-12-03 | Self-locking deep hole drilling clamp |
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| Publication Number | Publication Date |
|---|---|
| CN211081753U true CN211081753U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922134266.6U Active CN211081753U (en) | 2019-12-03 | 2019-12-03 | Self-locking deep hole drilling clamp |
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| Country | Link |
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| CN (1) | CN211081753U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638704A (en) * | 2021-10-13 | 2021-11-12 | 北京恒利新源地热能科技有限公司 | Drill rod locking device of top drive type geothermal drilling machine |
-
2019
- 2019-12-03 CN CN201922134266.6U patent/CN211081753U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113638704A (en) * | 2021-10-13 | 2021-11-12 | 北京恒利新源地热能科技有限公司 | Drill rod locking device of top drive type geothermal drilling machine |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: 065200 Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee after: The seventh Geological Brigade of Hebei Bureau of Geology and mineral resources Address before: 065201 239 Jing Yu Street, Yanjiao Economic Development Zone, Langfang, Hebei Patentee before: NO.7 GEOLOGICAL TEAM, HEBEI BUREAU OF GEOLOGY AND MINERAL RESOURCES |
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| CP03 | "change of name, title or address" | ||
| CB03 | Change of inventor or designer information |
Inventor after: Ye Lansu Inventor after: Zhang Yanyan Inventor after: Zhang Songyue Inventor after: Yang Liangsen Inventor after: Cao Yanli Inventor after: Wang Chong Inventor after: Yang Haiyan Inventor after: Gao Xiaoli Inventor after: Wang Xiaojuan Inventor before: Ye Lansu Inventor before: Zhang Yanyan Inventor before: Zhang Songyue Inventor before: Yang Liangsen Inventor before: Cao Yanli Inventor before: Wang Chong Inventor before: Yang Haiyan Inventor before: Gao Xiaoli Inventor before: Wang Xiaojuan |
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| CB03 | Change of inventor or designer information |