CN211694090U - Support frame for water conservancy and hydropower construction - Google Patents
Support frame for water conservancy and hydropower construction Download PDFInfo
- Publication number
- CN211694090U CN211694090U CN202020111789.9U CN202020111789U CN211694090U CN 211694090 U CN211694090 U CN 211694090U CN 202020111789 U CN202020111789 U CN 202020111789U CN 211694090 U CN211694090 U CN 211694090U
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- sliding
- bevel gear
- cushion
- groove
- base
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 7
- 230000008093 supporting effect Effects 0.000 description 7
- 238000005728 strengthening Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Abstract
The utility model relates to a support frame for water conservancy and hydropower construction, which comprises a base, four corners below the base are fixedly connected with pillars, horizontal sliding grooves are arranged on two sides of the base, sliding plates are slidably connected in the two sliding grooves, the end parts of the sliding plates, which are far away from the sliding grooves, extend out of the sliding grooves, the end parts of the sliding plates, which extend out of the sliding grooves, are fixedly connected with vertical baffles, and the two baffles are arranged oppositely; be equipped with the drive assembly that two sliding plates of drive kept away from each other or are close to each other in the sliding tray, be equipped with the apron on the baffle, the apron includes horizontally connecting plate and sliding connection in the curb plate at connecting plate both ends, and a plurality of thread grooves have been seted up to the baffle upper surface, offer the spliced eye the same with thread groove aperture on the curb plate, wear to be equipped with the grafting post in the spliced eye, be equipped with the external screw thread with thread groove threaded connection on the grafting post. The utility model has the advantages that can support the construction equipment of different specifications and fixed, the reinforcing suitability.
Description
Technical Field
The utility model belongs to the technical field of the water conservancy water and electricity technique and specifically relates to a support frame is used in water conservancy water and electricity construction.
Background
The hydraulic and hydroelectric engineering is a fundamental industry of national economy and social development, and is usually large in construction scale and long in construction period, and is greatly influenced by conditions such as natural resources, terrain, geology, hydrology, weather and the like, so that the construction scheme is different from that of conventional infrastructure. In water conservancy and hydropower engineering, the comprehensive utilization of natural environment and underground water is involved. Before hydraulic and hydroelectric engineering construction, need detect the topography on the spot, need use a lot of equipment at the in-process of construction moreover, because the construction site often the topography is comparatively complicated, because need the rack to keep the stability of construction equipment.
The current chinese patent with an authorization publication number of CN209705629U discloses a support frame for water conservancy and hydropower construction, which comprises a U-shaped support frame, wherein a level gauge is embedded in the front bottom of the U-shaped support frame, a plurality of lifting devices are arranged at equal intervals at the bottom end of the U-shaped support frame, and heat dissipation ports are arranged on two side walls of the U-shaped support frame. The cushion is all pasted to the inboard of U-shaped carriage both sides wall, and foretell support frame for water conservancy and hydropower construction plays the supporting effect to construction equipment, and overall structure is simple simultaneously, and the convenience is dismantled and is installed it.
The above prior art solutions have the following drawbacks: above-mentioned support frame for water conservancy water and electricity construction can't support and fix the construction equipment of different specifications, leads to the suitability to compare the limitation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a, its advantage can support the construction equipment of different specifications and fixed, reinforcing suitability.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a supporting frame for water conservancy and hydropower construction comprises a base, wherein supporting columns are fixedly connected to four corners below the base, horizontal sliding grooves are formed in two sides of the base, sliding plates are connected in the two sliding grooves in a sliding mode, the end parts, far away from the sliding grooves, of the sliding plates extend out of the sliding grooves, vertical baffle plates are fixedly connected to the end parts, extending out of the sliding grooves, of the sliding plates, and the two baffle plates are arranged oppositely; the improved sliding plate structure is characterized in that two driving assemblies for driving the sliding plates to be away from or close to each other are arranged in the sliding grooves, a cover plate is arranged on the baffle and comprises a horizontal connecting plate and side plates connected to two ends of the connecting plate in a sliding mode, the two side faces, opposite to the side plates, of the side plates are provided with transverse grooves, the connecting plate is connected in the transverse grooves in a sliding mode, a plurality of thread grooves are formed in the upper surface of the baffle, inserting holes with the same diameter as the thread grooves are formed in the side plates, inserting columns penetrate through the inserting holes, and external threads connected with the thread grooves in a threaded mode are.
Through adopting above-mentioned technical scheme, the sliding tray supplies the sliding plate to slide wherein, and two baffles are used for fixing construction equipment, make the total length increase of base and sliding plate through outwards moving the sliding plate, can realize fixing the longer equipment of width. The apron is used for spacing the top of equipment, makes equipment can't deviate from the top, and the apron includes curb plate and connecting plate, and two blocks of curb plates can slide on the connecting plate, and when two sliding plates removed the total length that makes sliding plate and base and changed, the length that the curb plate that slides made the total length of two blocks of curb plates and connecting plate and two sliding plates and base was mutually supported, realized the fixed to the apron through the threaded connection of grafting post and thread groove. The fixing of the construction equipment with different specifications can be realized, and the applicability is increased.
The present invention may be further configured in a preferred embodiment as: the driving assembly comprises a bidirectional screw rod, a communicating hole is formed between the two sliding grooves, the bidirectional screw rod penetrates through the communicating hole, the bidirectional screw rod is connected with the sliding grooves and the communicating hole in a rotating mode, the end portion of the bidirectional screw rod is in threaded connection with the inside of the sliding plate, a first bevel gear is fixedly connected onto the screw rod and is connected into the communicating hole in a rotating mode, a second bevel gear is meshed onto the first bevel gear and is perpendicular to the first bevel gear, a rotating hole communicated with the communicating hole is formed in the side face, adjacent to the sliding grooves, of the base, and the rotating shaft of the second bevel gear is connected with the rotating hole in a rotating mode.
Through adopting above-mentioned technical scheme, the screw thread on the two-way lead screw is length central symmetry, and the screw thread revolves to opposite, when having realized rotating two-way lead screw, threaded connection's sliding plate can keep away from each other or be close to each other simultaneously on the two-way lead screw, has made things convenient for the regulation to total length on base and the sliding plate. The second bevel gear is used for driving the first bevel gear to rotate, when the second bevel gear rotates, the first bevel gear meshed with the second bevel gear is driven to rotate, and the first bevel gear rotates to drive the bidirectional screw rod fixedly connected with the first bevel gear to rotate, so that the sliding plates on the bidirectional screw rod are simultaneously far away from or simultaneously close to each other.
The present invention may be further configured in a preferred embodiment as: the baffle is close to one side of base has seted up the cushion groove, sliding connection has the cushion in the cushion groove, the cushion inslot is equipped with reset spring, reset spring's both ends connect respectively in the tank bottom in cushion groove with on the cushion, work as when reset spring is in natural state, the one end of cushion stretches out the cushion groove, just the cushion with the upper surface of base is located same water flat line.
Through adopting above-mentioned technical scheme, the cushion groove supplies the cushion to slide wherein, and the cushion plays the supporting effect to construction equipment, because the sliding plate is followed the sliding tray in roll-off back, the upper surface of sliding plate is less than the upper surface of base, is unfavorable for the fixed to construction equipment, fills the height of sliding plate through the cushion, makes construction equipment better fixed. Reset spring plays the effect that resets to the cushion, and when reset spring was in natural state, the tip of cushion stretched out, can play the effect of support to the better equipment of length, and when the sliding plate removed to the sliding tray, the side of cushion and the side butt of base made reset spring compressed to make the cushion retract into the cushion groove, made the cushion can not lead to the fact the influence to the fixed of equipment.
The present invention may be further configured in a preferred embodiment as: the rotating shaft of the second bevel gear extends out of the rotating hole, and a handle is arranged on the rotating shaft of the second bevel gear.
By adopting the technical scheme, the handle is convenient for the operation of workers, and the rotating handle drives the second bevel gear to rotate so as to drive the first bevel gear to rotate, thereby realizing the driving of the bidirectional screw rod to rotate.
The present invention may be further configured in a preferred embodiment as: the wall of the insertion hole is provided with a cylindrical groove, the side surface of the insertion column is fixedly connected with a limiting ring, and the limiting ring is rotatably connected in the cylindrical groove.
Through adopting above-mentioned technical scheme, the spacing ring plays spacing effect to the spliced pole, makes the spliced pole can not deviate from in the spliced eye, and under the spacing of stopper, the stopper can play the supporting role to the apron, when the external screw thread of the bottom of spliced pole is to the internal rotation of thread groove, drives the apron and moves down, has realized adjusting highly according to the height of equipment.
The present invention may be further configured in a preferred embodiment as: the sliding plate is embedded with a ball which is abutted against the groove wall of the sliding groove.
Through adopting above-mentioned technical scheme, the ball that inlays on the sliding plate makes the sliding friction of sliding plate and sliding tray convert rolling friction into, reduces the frictional force between sliding plate and the sliding tray, makes the sliding plate can be better slide in the sliding tray.
The present invention may be further configured in a preferred embodiment as: the upper surface of the base is provided with an inclined surface for draining water.
Through adopting above-mentioned technical scheme, inclined plane makes the base possess better drainage performance on the base, makes construction equipment can not be in long-time soaking in water, increases construction equipment's life.
The present invention may be further configured in a preferred embodiment as: and reinforcing ribs are fixedly connected between the adjacent pillars.
Through adopting above-mentioned technical scheme, the strengthening rib is used for additional strengthening intensity and stability, and when the sliding plate shifts out from the sliding tray, plays better fixed effect, makes the pillar under the base more stable difficult removal.
To sum up, the utility model discloses a following at least one useful technological effect:
the sliding plate can be moved out of the sliding groove, so that the total length of the base and the sliding plate is increased, and meanwhile, the length of the cover plate can be extended, so that the adjustment is convenient, the construction equipment with different specifications can be conveniently fixed, and the application range is enlarged;
the cushion blocks connected in the cushion block grooves in a sliding mode can play a role in supporting the four corners of the construction equipment, and the phenomenon that the construction equipment is not firm due to the fact that the height difference of the base and the sliding plate is generated is avoided.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic cross-sectional view of the middle bottom plate, the sliding plate, the first bevel gear and the second bevel gear according to the present invention;
FIG. 3 is a schematic cross-sectional view of the middle insert column, the baffle plate and the side plate of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of the middle baffle plate and the sliding plate of the present invention.
Reference numerals: 1. a base; 2. a pillar; 201. a first column; 202. a second column; 3. a sliding groove; 4. a sliding plate; 5. a baffle plate; 6. a cover plate; 7. a side plate; 8. a connecting plate; 9. a thread groove; 10. inserting holes; 11. inserting the column; 12. an external thread; 13. a bidirectional screw rod; 14. a communicating hole; 15. a first bevel gear; 16. a second bevel gear; 17. rotating the hole; 18. a pad groove; 19. cushion blocks; 20. a return spring; 21. a handle; 22. a cylindrical groove; 23. a limiting ring; 24. a ball bearing; 25. an inclined surface; 26. reinforcing ribs; 27. hooping; 28. a transverse groove; 29. fixing the nail plate; 30. a fixing hole; 31. a clamping hole; 32. a fixing pin; 32. and a limiting block.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, for the utility model discloses a support frame is used in water conservancy water and electricity construction, including base 1, base 1 below four corners fixedly connected with pillar 2, pillar 2 includes first post 201 and second post 202, and first post 201 cup joints in first post 201 to make first post 201 can slide from top to bottom in second post 202, seted up fixed orifices 30 on the first post 201, the card hole 31 unanimous with the aperture of fixed orifices 30 is seted up to the second post 202 side. The first column 201 can slide in the second column 202, and the function of adjusting the height is realized. When the first column 201 slides to align the fixing hole 30 and the locking hole 31, the first column 201 and the second column 202 are fixed by the fixing pin 32. The bottom fixedly connected with staple board 29 of second post 202, during the use in the nail under staple board 29 inserts construction ground, makes whole support frame fixed more firm, makes the power of grabbing of support frame stronger.
Fixedly connected with strengthening rib 26 between adjacent pillar 2, strengthening rib 26 fixed connection is in the side of second post 202, and holistic structural strength is strengthened to strengthening rib 26, makes four pillars 2 be difficult for rocking.
The upper surface of the base 1 is provided with the inclined plane 25 for draining, and the inclined plane 25 on the base 1 enables the base 1 to have better drainage performance, so that the construction equipment cannot be immersed in water for a long time, and the service life of the construction equipment is prolonged.
The sliding plate 4 is embedded with balls 24, the balls 24 are abutted against the wall of the sliding groove 3, the balls 24 on the sliding plate 4 convert the sliding friction between the sliding plate 4 and the sliding groove 3 into rolling friction, and reduce the friction force between the sliding plate 4 and the wall of the sliding groove 3, so that the sliding plate 4 can better slide in the sliding groove 3.
The sliding groove 3 is internally provided with a driving component for driving the two sliding plates 4 to move away from or approach to each other, and the sliding plates 4 in the sliding groove 3 can move away from or approach to each other by the driving of the driving component.
The drive assembly comprises a bidirectional screw rod 13, threads on the bidirectional screw rod 13 are symmetrical in the center, the rotating directions are opposite, a communicating hole 14 is formed between two sliding grooves 3, the bidirectional screw rod 13 penetrates through the communicating hole 14, the bidirectional screw rod 13 is rotationally connected with the sliding grooves 3 and the communicating hole 14, the end portion of the bidirectional screw rod 13 is in threaded connection with a sliding plate 4, a first bevel gear 15 is fixedly connected onto the screw rod, the first bevel gear 15 is rotationally connected into the communicating hole 14, a second bevel gear 16 is meshed on the first bevel gear 15, the second bevel gear 16 is vertically arranged with the first bevel gear 15, a rotating hole 17 communicated with the communicating hole 14 is formed in the side surface, adjacent to the sliding grooves 3, of the base 1, and the rotating shaft of the second bevel gear 16 is rotationally. When the rotating shaft of the second bevel gear 16 is rotated, the second bevel gear 16 is driven to rotate, so as to drive the first bevel gear 15 engaged with the second bevel gear to rotate, and the first bevel gear 15 drives the bidirectional screw rod 13 fixedly connected to the first bevel gear to rotate, so that the sliding plates 4 in threaded connection with the end portions of the bidirectional screw rod 13 are far away from or close to each other.
The utility model discloses a drive assembly still can realize through the cylinder, and the cylinder is installed in base 1, and the piston rod of cylinder and sliding plate 4's tip fixed connection realize through the flexible being close to each other or keeping away from of the piston rod of cylinder sliding plate 4.
The rotating shaft of the second bevel gear 16 extends out of the rotating hole 17, and a handle 21 is fixedly connected to the rotating shaft of the second bevel gear 16, and the handle 21 is convenient for an operator to operate.
Referring to fig. 3, a cover plate 6 is placed on the baffle plate 5, the cover plate 6 comprises a horizontal connecting plate 8 and side plates 7 slidably connected to two ends of the connecting plate 8, transverse grooves 28 are formed in opposite side surfaces of the two side plates 7, the connecting plate 8 is slidably connected in the transverse grooves 28, the side plates 7 can slide on the connecting plate 8, so that the total length of the sliding plate 4 and the connecting plate 8 is increased, and when the total length of the base 1 and the sliding plate 4 is increased, the length of the side plates 7 and the connecting plate 8 is matched with the length of the sliding plate 4 and the base 1 through the sliding side plates 7.
A plurality of thread grooves 9 have been seted up to baffle 5 upper surface, seted up on the curb plate 7 with the same spliced eye 10 in thread groove 9 aperture, wear to be equipped with grafting post 11 in the spliced eye 10, be equipped with on the grafting post 11 with thread groove 9 threaded connection's external screw thread 12. The end of the plug-in stud 11 is screwed into the threaded groove 9, so that the fastening of the stop 5 to the side plate 7 is achieved.
Referring to fig. 4, a cushion block 19 groove 18 is formed in one side, close to the base 1, of the baffle 5, a cushion block 19 is slidably connected in the cushion block 19 groove 18, a return spring 20 is arranged in the cushion block 19 groove 18, two ends of the return spring 20 are respectively connected to the groove bottom of the cushion block 19 groove 18 and the cushion block 19, when the return spring 20 is in a natural state, one end of the cushion block 19 extends out of the cushion block 19 groove 18, the cushion block 19 and the upper surface of the base 1 are located on the same horizontal line, the cushion block 19 groove 18 is used for the cushion block 19 to slide therein, and the cushion block 19 has a supporting effect.
After the sliding plate 4 slides out of the sliding groove 3, the upper surface of the sliding plate 4 is lower than the upper surface of the base 1, so that the construction equipment is not fixed favorably, and the height of the sliding plate 4 is filled through the cushion block 19, so that the construction equipment is fixed better. Reset spring 20 plays the effect that resets to cushion 19, and when reset spring 20 was in the natural state, the tip of cushion 19 stretched out, can play the effect of support to the better equipment of length, when sliding plate 4 removed to sliding tray 3, the side of cushion 19 and the side butt of base 1 made reset spring 20 compressed to make cushion 19 retract into 19 grooves 18 of cushion, make cushion 19 can not lead to the fact the influence to the fixed of equipment.
The implementation principle of the embodiment is as follows: when the construction equipment with different specifications needs to be fixed, the handle 21 is rotated to drive the second bevel gear 16 to rotate, the second bevel gear 16 rotates to drive the first bevel gear 15 meshed with the second bevel gear to rotate, so that the sliding plates 4 in threaded connection on the bidirectional screw rod 13 are far away from or close to each other, the side plates 7 slide on the connecting plates 8 by sliding the side plates 7, the total length of the side plates 7 and the connecting plates 8 is matched with the total length of the sliding plates 4 and the base 1, the inserting columns 11 are rotated to enable the inserting columns 11 to be screwed into the threaded grooves 9, and the baffle 5 and the cover plate 6 are fixed.
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 support frame for water conservancy water and electricity construction, includes base (1), base (1) below four corners fixedly connected with pillar (2), its characterized in that: horizontal sliding grooves (3) are formed in two sides of the base (1), sliding plates (4) are connected in the two sliding grooves (3) in a sliding mode, the end portions, far away from the sliding grooves (3), of the sliding plates (4) extend out of the sliding grooves (3), vertical baffle plates (5) are fixedly connected to the end portions, extending out of the sliding grooves (3), of the sliding plates (4), and the two baffle plates (5) are arranged oppositely; be equipped with two in sliding tray (3) the drive assembly that sliding plate (4) kept away from each other or was close to each other, be equipped with apron (6) on baffle (5), apron (6) include horizontally connecting plate (8) and sliding connection in curb plate (7) at connecting plate (8) both ends, two horizontal groove (28) have been seted up to the side that curb plate (7) are relative, connecting plate (8) sliding connection in horizontal groove (28), a plurality of thread groove (9) have been seted up to baffle (5) upper surface, seted up on curb plate (7) with spliced eye (10) that thread groove (9) aperture is the same, peg (11) wear to be equipped with in peg (10), be equipped with on peg (11) with thread groove (9) threaded connection's external screw thread (12).
2. The support frame for water conservancy and hydropower construction of claim 1, which is characterized in that: the driving assembly comprises a bidirectional screw rod (13), a communicating hole (14) is formed between the two sliding grooves (3), the bidirectional screw rod (13) penetrates through the communicating hole (14), the bidirectional screw rod (13) is rotationally connected with the sliding grooves (3) and the communicating hole (14), the end part of the bidirectional screw rod (13) is in threaded connection with the inside of the sliding plate (4), a first bevel gear (15) is fixedly connected onto the screw rod, the first bevel gear (15) is rotationally connected into the communicating hole (14), a second bevel gear (16) is meshed onto the first bevel gear (15), the second bevel gear (16) is perpendicular to the first bevel gear (15), and a rotating hole (17) communicated with the communicating hole (14) is formed in the side surface, adjacent to the sliding grooves (3), of the base (1), the rotating shaft of the second bevel gear (16) is rotationally connected with the rotating hole (17).
3. The support frame for water conservancy and hydropower construction of claim 2, characterized in that: baffle (5) are close to cushion (19) groove (18) have been seted up to one side of base (1), sliding connection has cushion (19) in cushion (19) groove (18), be equipped with reset spring (20) in cushion (19) groove (18), the both ends of reset spring (20) connect respectively in the tank bottom in cushion (19) groove (18) with on cushion (19), work as when reset spring (20) are in natural state, the one end of cushion (19) is stretched out cushion (19) groove (18), just cushion (19) with the upper surface of base (1) is located same water flat line.
4. The support frame for water conservancy and hydropower construction of claim 2, characterized in that: the rotating shaft of the second bevel gear (16) extends out of the rotating hole (17), and a handle (21) is arranged on the rotating shaft of the second bevel gear (16).
5. The support frame for water conservancy and hydropower construction of claim 1, which is characterized in that: cylindrical grooves (22) are formed in the wall of each inserting hole (10), limiting rings (23) are fixedly connected to the side faces of the inserting columns (11), and the limiting rings (23) are rotatably connected into the cylindrical grooves (22).
6. The support frame for water conservancy and hydropower construction of claim 1, which is characterized in that: the sliding plate (4) is embedded with balls (24), and the balls (24) are abutted to the wall of the sliding groove (3).
7. The support frame for water conservancy and hydropower construction of claim 1, which is characterized in that: the upper surface of the base (1) is provided with an inclined surface (25) for draining water.
8. The support frame for water conservancy and hydropower construction of claim 1, which is characterized in that: and reinforcing ribs (26) are fixedly connected between the adjacent pillars (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111789.9U CN211694090U (en) | 2020-01-18 | 2020-01-18 | Support frame for water conservancy and hydropower construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020111789.9U CN211694090U (en) | 2020-01-18 | 2020-01-18 | Support frame for water conservancy and hydropower construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211694090U true CN211694090U (en) | 2020-10-16 |
Family
ID=72774779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020111789.9U Expired - Fee Related CN211694090U (en) | 2020-01-18 | 2020-01-18 | Support frame for water conservancy and hydropower construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211694090U (en) |
-
2020
- 2020-01-18 CN CN202020111789.9U patent/CN211694090U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201016 |