CN209837710U - Banded full-section slip casting pipe assembly - Google Patents
Banded full-section slip casting pipe assembly Download PDFInfo
- Publication number
- CN209837710U CN209837710U CN201920450841.0U CN201920450841U CN209837710U CN 209837710 U CN209837710 U CN 209837710U CN 201920450841 U CN201920450841 U CN 201920450841U CN 209837710 U CN209837710 U CN 209837710U
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- Prior art keywords
- grouting
- square steel
- grouting pipe
- square
- strip
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- 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.)
- Expired - Fee Related
Links
- 238000007569 slipcasting Methods 0.000 title description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 93
- 239000010959 steel Substances 0.000 claims abstract description 93
- 239000004745 nonwoven fabric Substances 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009435 building construction Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000011440 grout Substances 0.000 description 6
- 210000004722 stifle Anatomy 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model discloses a banded full-section grouting pipe assembly and a construction method, which relate to the technical field of building construction, and have the technical scheme that the grouting pipe assembly comprises a square steel group, wherein the square steel group comprises a plurality of internal hollow square steels horizontally arranged in parallel, a plurality of through holes are formed in the side wall and the upper wall of each square steel, each square steel is fixedly connected, the through holes between the side walls of two adjacent square steels are communicated, and the lower wall of each square steel is a complete steel plate; the utility model has the advantages that: the construction process has the characteristics of good grouting and plugging effects and simplicity in operation. The strip-shaped full-section grouting pipe with the rectangular section increases the contact probability of the grouting pipe and a concrete crack, and greatly improves the grouting and leaking stoppage effect. The probability of contact with the crack at the construction joint is increased, the grouting is sufficient, and the effect is good; the embedded steel bar is embedded in advance, is not influenced by narrow space between two layers of steel bars, and has strong operability; the construction process is simple and easy to control; the material is common and cheap.
Description
Technical Field
The utility model relates to a construction technical field, in particular to banded full section slip casting pipe subassembly.
Background
Although the existing circular tube-shaped full-section grouting pipe is applied, the existing circular tube-shaped full-section grouting pipe also has certain defects. First, the traditional full-face grouting pipe is generally fixed between two layers of reinforcing steel bars on two sides of a wallboard by nails after old concrete pouring is finished, but in reality, tools such as a hammer or a nail gun are difficult to use between the two layers of reinforcing steel bars, and the operability is poor. Secondly, the outer diameter of the full-section grouting pipe applied to the current construction is mainly about 2cm, and the seepage cracks appearing on the construction joints can easily bypass the grouting pipe, so that the expected grouting and seepage-stopping effect can not be achieved. Thirdly, the inner diameter of the full-section grouting pipe applied in the current construction is mainly about 0.8cm, and the material blockage is easily caused by improper manual operation or addition of a quick setting material in the grout.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model provides a banded full-section slip casting pipe subassembly.
The technical scheme includes that the strip-shaped full-section grouting pipe assembly comprises a square steel group, wherein the square steel group comprises a plurality of hollow square steels which are horizontally arranged in parallel, a plurality of through holes are formed in the side wall and the upper wall of each square steel, each square steel is fixedly connected, the through holes in the side walls of two adjacent square steels are communicated, and the lower wall of each square steel is a complete steel plate;
wing plates are symmetrically arranged on two outer sides of the long shaft of the square steel group;
and grouting holes are formed in the upper parts of two ends of the long shaft of the square steel group and are fixedly connected with grouting pipes, the grouting pipes are hollow pipes, pipe cavities of the grouting pipes and the inner cavity of the square steel group form communicated channels, and the axes of the grouting pipes are perpendicular to the upper surface of the square steel group.
The square steel is DN15 galvanized steel pipe; the length of the square steel is 6100 mm; the axial line distance between the two grouting holes on each square steel group is 6000 mm; the grouting pipe is a seamless steel pipe of ∅ 30 × 2.5;
note that:
1. the steel materials need to be fully welded, square steel welding combination can be omitted in mass production, and the requirements on stability and grouting are met. The grouting pipe assembly can be designed to be a single body with the length of every 6.1m, the two ends of the grouting pipe assembly are sealed, the two ends of each single body are respectively provided with a grouting inlet and are internally provided with internal threads, and the length of the grouting pipe assembly can be designed according to the thickness of a plate.
3. The nylon net, the non-woven fabric filter cloth and the steel are stuck and sealed by structural adhesive meeting the strength requirement.
4. And a ball valve is arranged at the grouting opening, and a grouting joint which is provided with a grouting pipe of the grouting machine is arranged at the ball valve.
Preferably, the long axes of each square steel of the square steel group are parallel to each other, and two end faces of each long axis of the square steel group are flush;
both ends of the long shaft of the square steel group are closed ends, and steel plates for closing are fixedly connected with the two ends of the long shaft of the square steel group.
Preferably, the wing plate comprises a horizontal part and a bent part, the horizontal part is a horizontal plate fixedly connected with the outer side surface of the square steel group, and the bent part faces to one side far away from the square steel group and inclines downwards;
the internal angle of the horizontal part and the bent part is 135 degrees.
The thickness of the wing plate is 3mm thick water stop steel plate.
Preferably, the top of slip casting pipe sets up the internal thread, slip casting pipe top threaded connection stifle, stifle periphery sets up and corresponds the external screw thread on slip casting pipe top, the hexagonal shrinkage pool in the top of stifle sets up.
Preferably, the outside of the square steel group is coated with a non-woven fabric filter cloth layer and a nylon wire mesh in sequence from inside to outside.
Preferably, ball valves are arranged at the ends, far away from the square steel group, of the grouting pipes, one end of one ball valve is communicated with the grouting pipe, and the other end of the ball valve is communicated with a discharge hole of the grouting machine through a grouting connector.
A construction method of a strip-shaped full-section grouting pipe component,
s1, embedding a strip-shaped full-section grouting pipe assembly;
s2, pouring concrete for one time: installing the die, pouring concrete, and pouring the concrete to a designed height; during the concrete pouring process, a material distribution port cannot directly impact the grouting pipe, so that the structure of the grouting pipe is damaged and the position of the grouting pipe deviates; after primary pouring, exposing about half of the height of the grouting pipe on the poured concrete surface;
s3, demolding: after the concrete poured in the S2 is solidified, the mould is dismantled, and care should be taken when the mould is dismantled to prevent the grouting pipe from being damaged; chiseling is carried out after the mould is removed, the chiseling is careful, a special chiseling tool is preferably adopted, the grouting pipe cannot be damaged, and the chiseling is not carried out within the range of 1cm away from the root of the steel bar;
s4, pouring concrete for the second time at the position of the half of the exposed grouting pipe; during the process of pouring and mixing the concrete, the material distribution port cannot directly impact the grouting pipe, so that the structure of the grouting pipe is damaged and the position of the grouting pipe deviates; after secondary pouring, the upper end surface of the grouting pipe is flush with the upper end surface of the concrete;
s5, checking water leakage at construction joints: after the concrete poured in the S4 is solidified, removing garbage and dirt near the construction joint, carefully observing and recording the water leakage condition;
s6, stirring the slurry: the water-cement ratio is strictly controlled to ensure the quality of the slurry;
s7, grouting: selecting a corresponding grouting pipe for grouting according to the water leakage condition observed in the S5;
and S8, closing the ball valve after grouting is finished, removing the ball valve after the grouting material is solidified, and trowelling the grouting pipe by using quick-drying cement.
Preferably, the step S1 is to pre-embed the strip-shaped full-face grouting pipe assemblies, and the specific method is to pre-embed a plurality of strip-shaped full-face grouting pipe assemblies at the construction joint position according to the drawing design and the site construction requirements, the plurality of strip-shaped full-face grouting pipe assemblies are arranged in an adjacent linear array along the long axis direction, and the strip-shaped full-face grouting pipe assemblies are welded and fixed on the reinforcing steel bars of the building structure; the method comprises the following steps of (1) comprehensively checking before pouring concrete to ensure that a strip-shaped full-section grouting pipe assembly is not damaged and a blank cap at a grouting pipe is normally installed, and preventing the concrete from flowing into the pipe during pouring to cause the grouting pipe to block the pipe; and the damaged part in the construction process can repair the strip-shaped full-section grouting pipe assembly in time.
Preferably, when grouting is performed in S7, the blank cap is screwed out, each grouting pipe is connected to a ball valve, and one end of each ball valve is connected to a grouting pipe;
during grouting, one ball valve on the same strip-shaped full-face grouting pipe assembly is provided with a grouting joint and is communicated with a discharge hole of a grouting machine, and the other ball valve is opened;
the grouting pressure during grouting is controlled within the range of 0.2MPa to 0.4 MPa; and after grouting is started, observing the grouting condition from the ball valve without a grouting machine head until the grout is discharged and is similar to the mixed grout, closing the ball valve, pausing for 1 minute when the pressure is larger, grouting again, closing the ball valve if the pressure is still larger, and stopping grouting.
The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the construction process has the characteristics of good grouting and plugging effects and simplicity in operation.
The strip-shaped full-section grouting pipe with the rectangular section increases the contact probability of the grouting pipe and a concrete crack, and greatly improves the grouting and leaking stoppage effect. The probability of contact with the crack at the construction joint is increased, the grouting is sufficient, and the effect is good; the embedded steel bar is embedded in advance, is not influenced by narrow space between two layers of steel bars, and has strong operability; the construction process is simple and easy to control; the material is common and cheap.
The banded full-section grouting pipe can be welded and embedded after the reinforcing steel bars on one of the two surfaces of the wallboard are bound, and does not need to be operated and installed in a limited space by a tool between two layers of reinforcing mesh sheets after the first concrete pouring in the traditional construction.
This banded full-face slip casting pipe can set up two injected holes at per 6 meters, and one of them injected hole can be regarded as the thick liquid and observe the hole concurrently, closes thick liquid observation hole ball valve behind the discharge pipe normal water and carries out the slip casting shutoff, if stifled pipe appears in the middle of the injected pipe, can observe hole slip casting leaking stoppage again, ensures the effect of slip casting leaking stoppage.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a partially enlarged view a of fig. 1.
Fig. 3 is a schematic view of a cap structure according to an embodiment of the present invention.
Wherein the reference numerals are: 1. a square steel group; 2. a wing plate; 3. a grouting pipe; 4. and (7) closing the cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the embodiments and features of the embodiments of the present invention can be combined with each other without conflict.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise specified, "a plurality" means two or more.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
Referring to fig. 1 to 3, the utility model provides a strip-shaped full-section grouting pipe assembly, which comprises a square steel group 1, wherein the square steel group 1 comprises a plurality of horizontally arranged square steels with hollow interiors, a plurality of through holes are arranged on the side wall and the upper wall of each square steel, each square steel is fixedly connected, the through holes between the side walls of two adjacent square steels are communicated, and the lower wall of each square steel is a complete steel plate;
wing plates 2 are symmetrically arranged on two outer sides of a long shaft of the square steel group 1;
the grouting holes are formed in the upper portions of the two ends of the long shaft of the square steel group 1 and are fixedly connected with the grouting pipes 3, the grouting pipes 3 are hollow pipes, the pipe cavities of the grouting pipes and the inner cavity of the square steel group form communicated channels, and the axis of each grouting pipe 3 is perpendicular to the upper surface of the square steel group 1.
The square steel is DN15 galvanized steel pipe; the length of the square steel is 6100 mm; the axial line distance between two grouting holes on each square steel group is 6000 mm; the grouting pipe 3 is a seamless steel pipe of ∅ 30 × 2.5;
note that:
1. units in mm are not specified.
2. The steel materials need to be fully welded, square steel welding combination can be omitted in mass production, and the requirements on stability and grouting are met. The grouting pipe assembly can be designed to be a single body with the length of every 6.1m, the two ends of the grouting pipe assembly are sealed, the two ends of each single body are respectively provided with a grouting inlet and are internally provided with internal threads, and the length of the grouting pipe assembly can be designed according to the thickness of a plate.
3. The nylon net, the non-woven fabric filter cloth and the steel are stuck and sealed by structural adhesive meeting the strength requirement.
4. And a ball valve is arranged at the grouting opening, and a grouting joint which is provided with a grouting pipe of the grouting machine is arranged at the ball valve.
The long shafts of the square steels of the square steel group 1 are parallel to each other, and two end surfaces of the long shafts of the square steels of the square steel group 1 are flush;
both ends of the long shaft of the square steel group 1 are closed ends, and steel plates for closing are fixedly connected with the two ends of the long shaft.
The wing plate 2 comprises a horizontal part and a bent part, the horizontal part is a horizontal plate fixedly connected with the outer side surface of the square steel group 1, and the bent part faces to one side far away from the square steel group 1 and inclines downwards;
the internal angle of the horizontal portion and the bent portion is 135 °.
The plate thickness of the wing plate 2 is 3 mm.
The top of slip casting pipe 3 sets up the internal thread, and 3 top threaded connection stifle 4 of slip casting pipe, stifle 4 periphery set up the external screw thread on corresponding slip casting pipe 3 top, and the hexagonal shrinkage pool in the top of stifle 4 sets up.
The outside of the square steel group 1 is coated with a non-woven fabric filter cloth layer and a nylon wire mesh in sequence from inside to outside.
And one end of the square steel group 1 far away from the grouting pipe 3 is provided with a ball valve, one end of one ball valve is communicated with the grouting pipe 3, and the other end of the ball valve is communicated with a discharge hole of the grouting machine through a grouting interface.
Example 2
On the basis of the embodiment 1, the construction method of the strip-shaped full-section grouting pipe component,
s1, embedding a strip-shaped full-section grouting pipe assembly;
s2, pouring concrete for one time: installing the die, pouring concrete, and pouring the concrete to a designed height; during the concrete pouring process, a material distribution port cannot directly impact the grouting pipe, so that the structure of the grouting pipe is damaged and the position of the grouting pipe deviates; after primary pouring, exposing about half of the height of the grouting pipe on the poured concrete surface;
s3, demolding: after the concrete poured in the S2 is solidified, the mould is dismantled, and care should be taken when the mould is dismantled to prevent the grouting pipe from being damaged; chiseling after removing the mold, wherein the chiseling is careful and cannot damage the grouting pipe;
s4, pouring concrete for the second time at the position of the half of the exposed grouting pipe; during the process of pouring and mixing the concrete, the material distribution port cannot directly impact the grouting pipe, so that the structure of the grouting pipe is damaged and the position of the grouting pipe deviates; after secondary pouring, the upper end surface of the grouting pipe is flush with the upper end surface of the concrete;
s5, checking water leakage at construction joints: after the concrete poured in the S4 is solidified, removing garbage and dirt near the construction joint, carefully observing and recording the water leakage condition;
s6, stirring the slurry: the water-cement ratio is strictly controlled to ensure the quality of the slurry;
s7, grouting: selecting a corresponding grouting pipe 3 for grouting according to the water leakage condition observed in S5;
and S8, closing the ball valve after grouting is finished, removing the ball valve after the grouting material is solidified, and trowelling the grouting pipe 3 by using quick-setting cement.
S1 pre-embedding a strip-shaped full-face grouting pipe assembly, wherein the method comprises the steps of pre-embedding a plurality of strip-shaped full-face grouting pipe assemblies at construction joint positions according to drawing design and site construction requirements, arranging the plurality of strip-shaped full-face grouting pipe assemblies in an adjacent linear array along the long axis direction, and welding and fixing the strip-shaped full-face grouting pipe assemblies on reinforcing steel bars of a building structure; the method comprises the following steps of (1) comprehensively checking before pouring concrete to ensure that a strip-shaped full-section grouting pipe assembly is not damaged and a blank cap 4 at a grouting pipe 3 is normally installed, and preventing the concrete from flowing into the pipe during pouring to cause the grouting pipe 3 to block the pipe; and the damaged part in the construction process can repair the strip-shaped full-section grouting pipe assembly in time.
S7, when grouting, screwing out the blank cap 4, connecting each grouting pipe 3 with a ball valve, and connecting one end of each ball valve with the grouting pipe 3;
during grouting, one ball valve on the same strip-shaped full-face grouting pipe assembly is provided with a grouting joint and is communicated with a discharge hole of a grouting machine, and the other ball valve is opened;
the grouting pressure during grouting is controlled within the range of 0.2MPa to 0.4 MPa; and after grouting is started, observing the grouting condition from the ball valve without a grouting machine head until the grout is discharged and is similar to the mixed grout, closing the ball valve, pausing for 1 minute when the pressure is larger, grouting again, closing the ball valve if the pressure is still larger, and stopping grouting.
In actual conditions, due to the fact that the sectional area of the grouting pipe is relatively large, the anti-blocking pipe performance is relatively strong, other grouting slurry can be tried to be used according to the leakage condition, and the optimal grouting effect is guaranteed, such as single-fluid slurry (cement slurry), double-fluid slurry (mixed liquid of cement slurry and water glass), Seebgas permeable crystallization, epoxy resin and the like.
The non-woven fabric filter layer of the strip-shaped full-section grouting pipe can be improved to be made of the same material as an elastic one-way hole foaming strip adopted in grouting construction, the non-woven fabric filter layer can be opened towards a hole under the condition of pressure and can be used for grouting, after grouting pressure disappears, the single hole is closed, and grout cannot flow. The pipeline can be washed after grouting to provide a precondition for later re-grouting.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The strip-shaped full-section grouting pipe assembly is characterized by comprising a square steel group (1), wherein the square steel group (1) comprises a plurality of hollow square steels which are horizontally arranged in parallel, a plurality of through holes are formed in the side wall and the upper wall of each square steel, each square steel is fixedly connected, the through holes between the side walls of two adjacent square steels are communicated, and the lower wall of each square steel is a complete steel plate;
the square steel group is characterized in that grouting holes are formed in the upper portions of two ends of a long shaft of the square steel group (1), the grouting holes are fixedly connected with grouting pipes (3), the grouting pipes (3) are hollow pipes, pipe cavities of the grouting pipes and the inner cavity of the square steel group form communicated channels, and the axis of each grouting pipe (3) is perpendicular to the upper surface of the square steel group (1).
2. The strip full face slip pipe assembly as claimed in claim 1, wherein the long axes of each of said square steels of said square steel sets (1) are parallel to each other, and two end faces of each of said long axes of said square steels of said square steel sets (1) are flush;
both ends of the long shaft of the square steel group (1) are closed ends, and steel plates for closing are fixedly connected with the two ends.
3. The strip-shaped full-face grouting pipe assembly according to claim 2, characterized in that the top end of the grouting pipe (3) is provided with an internal thread, the top end of the grouting pipe (3) is connected with a blank cap (4) in a threaded manner, the periphery of the blank cap (4) is provided with an external thread corresponding to the top end of the grouting pipe (3), and the top of the blank cap (4) is provided with an internal hexagonal concave hole.
4. The strip-shaped full-face grouting pipe assembly as claimed in claim 1, wherein the square steel set (1) is coated with a non-woven fabric filter cloth layer and a nylon wire mesh in sequence from inside to outside.
5. The strip-shaped full-face grouting pipe assembly according to claim 1, characterized in that a ball valve is arranged at one end of the grouting pipe (3) far away from the square steel group (1), one end of the ball valve is communicated with the grouting pipe (3), and the other end of the ball valve is communicated with a discharge hole of a grouting machine through a grouting connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450841.0U CN209837710U (en) | 2019-04-04 | 2019-04-04 | Banded full-section slip casting pipe assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920450841.0U CN209837710U (en) | 2019-04-04 | 2019-04-04 | Banded full-section slip casting pipe assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209837710U true CN209837710U (en) | 2019-12-24 |
Family
ID=68909865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920450841.0U Expired - Fee Related CN209837710U (en) | 2019-04-04 | 2019-04-04 | Banded full-section slip casting pipe assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209837710U (en) |
-
2019
- 2019-04-04 CN CN201920450841.0U patent/CN209837710U/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: 20191224 |