CN112776165A - Tubular pile tensioning system and method - Google Patents
Tubular pile tensioning system and method Download PDFInfo
- Publication number
- CN112776165A CN112776165A CN202110002198.7A CN202110002198A CN112776165A CN 112776165 A CN112776165 A CN 112776165A CN 202110002198 A CN202110002198 A CN 202110002198A CN 112776165 A CN112776165 A CN 112776165A
- Authority
- CN
- China
- Prior art keywords
- oil return
- oil
- umbrella
- spring
- circular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a tubular pile tensioning system and a method, the structure of which comprises a top cover, a control panel, a machine body, a throttling system, an oil return pipe and a switch, wherein the top end surface of the machine body is provided with the control panel, one side of the control panel of the machine body is movably provided with the top cover, one side of the machine body is provided with the oil return pipe, the throttling system is arranged in the oil return pipe, the switch is arranged obliquely above the throttling system, the throttling system is provided with an umbrella cap, a retraction mechanism and a mounting disc, the retraction mechanism is arranged in the middle of the mounting disc and fixedly connected with the mounting disc, the invention increases the throttling system, changes the oil circuit distribution of parallel branches and further changes the flow of an outflow executive component to realize speed regulation, namely, the umbrella cap and the retraction mechanism of the throttling system are mutually matched, when the pipe is not used, a spring blocks an oil return port under the normal condition, when, i.e., to moderate the rate of oil pressure drop.
Description
The application is a divisional application of prestressed pipe pile automatic tensioning equipment, wherein the application date is 2019, 10 and 28, and the application number is CN 201911033745.7.
Technical Field
The invention relates to the field of building equipment, in particular to a tubular pile tensioning system and a tubular pile tensioning method.
Background
Concrete is the most basic material of modern buildings, concrete pipe piles made of concrete are important components for building support, reinforcing steel bars are embedded in the concrete pipe piles to enhance the load bearing capacity of the concrete pipe piles, prestress needs to be applied to an internal reinforcement cage before the concrete pipe piles bear external load, the bending resistance and rigidity of the pipe piles are improved, the time for occurrence of cracks is delayed, the durability of the concrete pipe piles is increased, and the prestress application method is that steel strands are pulled generally through an oil pump, the steel strands are used for fixing and fixing two ends of an anchorage device, clamping pieces are installed, a steel sleeve is used for tapping, an anchor ring is sleeved in order, after the pressure application is finished, when unloading is carried out, the oil pressure of the oil pump is reduced too fast, unstable impact force is generated, and slipping is easy to occur.
Disclosure of Invention
Aiming at the defects of the prior art, the invention is realized by the following technical scheme: the tubular pile tensioning system comprises a top cover, a control panel, a machine body, a throttling system, an oil return pipe and a switch, wherein the control panel is arranged on the top end face of the machine body, the top cover is movably mounted on one side of the control panel of the machine body, the oil return pipe is arranged on one side of the machine body, the throttling system is mounted in the oil return pipe, and the switch is arranged above the throttling system in an inclined mode.
As a further optimization of the technical scheme, the throttling system is provided with an umbrella cap, a retraction mechanism and a mounting disc, the retraction mechanism is arranged in the middle of the mounting disc, the retraction mechanism is fixedly connected with the mounting disc, the umbrella cap is arranged at the top of the retraction mechanism, the umbrella cap is movably matched with the retraction mechanism, and the mounting disc is movably contacted with the inner wall of the oil return pipe.
As a further optimization of this technical scheme, the umbrella hat is equipped with circular umbrella face, stamen post, links up the ball, be equipped with the stamen post in the middle of circular umbrella face bottom surface is positive, stamen post and circular umbrella face vertical fixation, the stamen post is kept away from circular umbrella face bottom and is equipped with and links up the ball, it is fixed with the stamen post to link up the ball, it cooperatees with retraction mechanism to link up the ball.
As the further optimization of the technical scheme, the retraction mechanism is composed of a barrel, a spring, a base and a damping ring, the damping ring is arranged at the bottom end inside the barrel, the damping ring is movably matched with the barrel, the base is installed on the damping ring, the spring is installed on the top end face of the base, the spring is in movable contact with a linking ball, and an installation disc is installed on the outer surface of the bottom of the barrel.
As the further optimization of this technical scheme, be equipped with the pointed cone between spring and the linking ball linking position, it is equipped with a notch to link up the positive centre of ball bottom surface, pointed cone and notch cooperate, the positive centre of pointed cone bottom surface and spring fixed connection, accurate linking butt joint can not have the error, links up stably, and circular umbrella face pushes down smoothly.
As a further optimization of the technical scheme, the round umbrella cover is of a structure with a thin front end and a large back end, and is positioned in the middle of the oil return pipe.
As the further optimization of the technical scheme, the circular umbrella cover is positioned in the middle of the oil return pipe, the top of the circular umbrella cover faces the oil return port, the shunting effect is achieved, and under the shunting condition, the oil outlet speed is reduced due to the shunting influence of the nut component and the resistance of the nut.
As a further optimization of the technical scheme, the edge of the round umbrella cover with larger area is smooth, and the line is smooth.
As a further optimization of the technical scheme, the mounting disc is of an annular hollow structure.
Advantageous effects
Compared with the prior art, the tubular pile tensioning system and method provided by the invention have the following advantages:
1. the invention adds a throttling system, changes the oil path distribution of a parallel branch, and further changes the flow out of an actuating element to realize speed regulation, namely, an umbrella cap and a retraction mechanism of the throttling system are mutually matched, when the throttling system is not used, a spring blocks an oil return port under the normal condition, and when the throttling system is used, the oil return speed of an oil pump can be reduced when the elastic potential energy of the spring is compressed, namely, the speed of reducing the oil pressure is relieved.
2. The circular umbrella cover is positioned in the center of the oil way, the top of the circular umbrella cover faces the oil return port, the shunting effect is achieved, under the shunting condition, the oil outlet speed is reduced due to the shunting effect of the umbrella cap and the resistance of the circular umbrella cover, and the oil pressure reduction speed is relieved for the second time.
3. The circular umbrella surface is of a structure with a thin front end and a large rear end, is positioned in the middle of an oil pipe, reduces the oil quantity return area of the whole oil circuit, reduces the oil quantity of return oil, namely slows down the oil return speed of an oil pump, and is the third method for relieving the oil pressure drop.
4. The edge of the round umbrella cover with larger area is smooth, the linear arc structure with smooth lines is adopted, impurities exist in used oil, the lines are smooth, the adhesion of the impurities is reduced, the integral gravity of the round umbrella cover is reduced, and the round umbrella cover can smoothly return to the closed oil return port under the spring conveniently.
5. The mounting disc is of an annular hollow structure, the stability of integral mounting is improved, the deviation of four positions is avoided, the central line and the oil return opening are always on the same line, and the oil return opening is accurately sealed.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic perspective view of a tubular pile tensioning system and method according to the present invention.
FIG. 2 is a schematic plan view of a throttling system of the present invention.
FIG. 3 is a schematic cross-sectional view of a throttle system of the present invention in use.
FIG. 4 is a schematic cross-sectional view of the throttle system of the present invention when not in use.
FIG. 5 is an enlarged view of the structure A in FIG. 3 according to the present invention.
Fig. 6 is a schematic perspective view of the umbrella cover of the present invention.
In the figure: the umbrella comprises a top cover 1, a control panel 2, a machine body 3, a throttling system 4, an oil return pipe 5, a switch 6, an umbrella cap 71, a retraction mechanism 72, a mounting disc 73, a round umbrella cover 711, a core column 712, a connecting ball 713, a cylinder body 721, a pointed cone 722, a spring 723, a base 724 and a damping ring 725.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.
Examples
Referring to fig. 1-6, the present invention provides a pipe pile tensioning system and method, the structure of which includes a top cover 1, a control panel 2, a machine body 3, a throttling system 4, an oil return pipe 5, and a switch 6, the top end surface of the machine body 3 is provided with the control panel 2, one side of the control panel 2 of the machine body 3 is movably installed with the top cover 1, one side of the machine body 3 is provided with the oil return pipe 5, the throttling system 4 is installed in the oil return pipe 5, and the switch 6 is installed above the throttling system 4 in an oblique direction.
The umbrella cap 71 is provided with a round umbrella cover 711, a core column 712 and a connecting ball 713, the core column 712 is arranged in the middle of the bottom surface of the round umbrella cover 711, the core column 712 and the round umbrella cover 711 are vertically fixed, the connecting ball 713 is arranged at the bottom end, far away from the round umbrella cover 711, of the core column 712, the connecting ball 713 and the core column 712 are fixed, and the connecting ball 713 is matched with the retraction mechanism 72.
The retraction mechanism 72 is composed of a cylinder 721, a spring 723, a base 724 and a damping ring 725, the damping ring 725 is arranged at the bottom end inside the cylinder 721, the damping ring 725 is movably matched with the cylinder 721, the base 724 is arranged on the damping ring 725, the spring 723 is arranged on the top end face of the base 724, the spring 723 is movably contacted with the engaging ball 713, and a mounting disc 73 is arranged on the outer surface of the bottom of the cylinder 721.
A pointed cone 722 is arranged between the connecting positions of the spring 723 and the connecting ball 713, a notch is arranged in the middle of the bottom surface of the connecting ball 713, the pointed cone 722 is matched with the notch, the middle of the bottom surface of the pointed cone 722 is fixedly connected with the spring 723, accurate connection and butt joint are achieved, no error exists, connection is stable, and the circular umbrella surface 711 is smoothly pressed down.
The circular umbrella surface 711 is of a structure with a thin front end and a large back end, and is located in the middle of the oil return pipe 5, so that the oil mass outlet area of the whole oil way is reduced, the oil mass of the oil return is reduced, and the oil return speed of the oil pump is reduced.
The circular umbrella surface 711 is positioned in the middle of the oil return pipe 5, the top of the circular umbrella surface faces the oil return opening, a shunting effect is achieved, and under the shunting condition, the oil outlet speed is reduced due to the shunting influence of the nut component and the resistance of the nut.
The edge of the round umbrella surface 711 with a large area is smooth, the linear arc structure with smooth lines is adopted, impurities exist in used oil, the smooth lines reduce the adhesion of the impurities, the overall gravity of the nut is reduced, and the screw cap can smoothly return to the closed oil outlet under the spring.
The mounting disc 73 is of an annular hollow structure, the stability of integral mounting is improved, oil can be discharged smoothly, the deviation at four positions cannot occur, the central line and the oil outlet are always on the same line, and the oil outlet is accurately sealed.
When the hydraulic oil recovery device is used, the throttling system 4 is installed at an oil return opening of the oil return pipe 5, when the oil return pipe recovers hydraulic oil on a jack, the oil return opening is blocked under the normal condition of the spring 723 when the hydraulic oil recovery device is not used, when the hydraulic oil recovery device is used, the umbrella cap 71 is pressed under the pressure of flowing of the hydraulic oil in a backflow mode, and the elastic potential energy of the spring 723 is further compressed, so that the oil return speed of an oil pump can be reduced, namely the speed of oil pressure reduction is relieved; secondly, the circular umbrella surface 711 is positioned at the center of the oil circuit, the top of the circular umbrella surface 711 faces the oil return port, a shunting effect is achieved, and under the shunting condition, the oil outlet speed is further reduced under the shunting influence of the umbrella cap 71 and the resistance of the circular umbrella surface 711; thirdly, the larger end edge of the circular umbrella surface 711 has a smooth linear arc structure, the lines are smooth, impurities exist in used oil, the lines are smooth, the adhesion of the impurities is reduced, the overall gravity of the circular umbrella surface 711 is reduced, the circular umbrella surface 711 can conveniently and smoothly return to a closed oil return port under a spring, and fourthly, the mounting disc 73 is of an annular hollow structure, so that the overall mounting stability is improved, the deviation at all places cannot occur, the central line and the oil return port are always on the same line, and the oil return port is accurately closed; finally, the umbrella cap 71 and the retraction mechanism 72 are matched with each other through the pointed cone 722 and the engagement ball 713, one-to-one accurate clamping is realized, the engagement is stable, the circular umbrella surface 711 is smoothly pressed down without bias, and the smooth implementation of the functions is ensured.
While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (2)
1. The utility model provides an automatic tensioning equipment of prestressed pipe pile which characterized in that: the structure of the air conditioner comprises a top cover (1), a control panel (2), a machine body (3), a throttling system (4), an oil return pipe (5) and a switch (6), wherein the control panel (2) is arranged on the top end face of the machine body (3), the top cover (1) is movably mounted on one side of the control panel (2) of the machine body (3), the oil return pipe (5) is arranged on one side of the machine body (3), the throttling system (4) is mounted in the oil return pipe (5), and the switch (6) is arranged above the throttling system (4) in an inclined mode; the throttling system (4) is provided with an umbrella cap (71), a retraction mechanism (72) and a mounting disc (73), the retraction mechanism (72) is arranged in the middle of the mounting disc (73), the top of the retraction mechanism (72) is provided with the umbrella cap (71), and the mounting disc (73) is movably contacted with the inner wall of the oil return pipe (5); the umbrella cap (71) is provided with a round umbrella cover (711), a core column (712) and a connecting ball (713), the core column (712) is arranged in the middle of the bottom surface of the round umbrella cover (711), the connecting ball (713) is arranged at the bottom end, far away from the round umbrella cover (711), of the core column (712), and the connecting ball (713) is matched with the retraction mechanism (72); the retraction mechanism (72) is composed of a cylinder body (721), a spring (723), a base (724) and a damping ring (725), the damping ring (725) is arranged at the bottom end inside the cylinder body (721), the base (724) is installed on the damping ring (725), the spring (723) is installed on the top end face of the base (724), the spring (723) is in movable contact with the engaging ball (713), and an installation disc (73) is installed on the outer surface of the bottom of the cylinder body (721); a pointed cone (722) is arranged between the connecting positions of the spring (723) and the connecting ball (713), a notch is arranged in the middle of the bottom surface of the connecting ball (713), and the pointed cone (722) is matched with the notch; the round umbrella surface (711) is of a structure with a thin front end and a large back end, and is positioned in the middle of the oil return pipe (5); the edge of the round umbrella surface (711) with larger area is smooth, and the line is smooth; the mounting disc (73) is of an annular hollow structure;
the throttling system (4) is arranged at an oil return opening of the oil return pipe (5), the spring (723) is in a normal condition when oil does not flow out, the oil return opening is blocked by the spring (723) at the moment, hydraulic oil flows back when the throttling system is used, the umbrella cap (71) is pressed under the pressure of flowing liquid, the elastic potential energy of the spring (723) is further compressed, the circular umbrella cover (711) is positioned in the center of an oil circuit, the top of the circular umbrella cover faces the oil return opening, a shunting effect is achieved, under the condition of oil flow shunting of the oil return pipe (5), the circular umbrella cover (711) is influenced by shunting of the umbrella cap (71) and the resistance of the circular umbrella cover (711), the end edge with a larger area is smooth and smooth, the adhesion of impurities is reduced, the overall gravity of the circular umbrella cover (711) is reduced, the circular umbrella cover (711) can conveniently and smoothly return the oil return opening under the spring, the mounting disc (73) is of an annular hollow structure, and the umbrella cap (71) and the retraction mechanism (72) are, the stability is improved, the circular umbrella cover (711) is smoothly pressed, and the smooth implementation of the functions is ensured without bias.
2. A tubular pile tensioning system and method according to any one of claims 1, characterized in that:
when the hydraulic jack is used, the throttling system 4 is arranged at an oil return opening of the oil return pipe 5, and when the oil return pipe recovers the hydraulic oil on the jack and is not used, the oil return opening is blocked under the normal condition of the spring 723;
when the hydraulic oil pressure-reducing umbrella is used, when hydraulic oil flows back, the umbrella cap 71 is pressed under the flowing pressure of the liquid, and the elastic potential energy of the spring 723 is further compressed, the oil return speed of an oil pump can be reduced, namely the speed of reducing the oil pressure is relieved; secondly, the circular umbrella surface 711 is positioned at the center of the oil circuit, the top of the circular umbrella surface 711 faces the oil return port, a shunting effect is achieved, and under the shunting condition, the oil outlet speed is further reduced under the shunting influence of the umbrella cap 71 and the resistance of the circular umbrella surface 711; thirdly, the larger end edge of the circular umbrella surface 711 has a smooth linear arc structure, the lines are smooth, impurities exist in used oil, the lines are smooth, the adhesion of the impurities is reduced, the overall gravity of the circular umbrella surface 711 is reduced, the circular umbrella surface 711 can conveniently and smoothly return to a closed oil return port under a spring, and fourthly, the mounting disc 73 is of an annular hollow structure, so that the overall mounting stability is improved, the deviation at all places cannot occur, the central line and the oil return port are always on the same line, and the oil return port is accurately closed;
finally, the umbrella cap 71 and the retraction mechanism 72 are matched with each other through the pointed cone 722 and the engagement ball 713, one-to-one accurate clamping is realized, the engagement is stable, the circular umbrella surface 711 is smoothly pressed down without bias, and the smooth implementation of the functions is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002198.7A CN112776165A (en) | 2019-10-28 | 2019-10-28 | Tubular pile tensioning system and method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110002198.7A CN112776165A (en) | 2019-10-28 | 2019-10-28 | Tubular pile tensioning system and method |
| CN201911033745.7A CN110788987B (en) | 2019-10-28 | 2019-10-28 | Automatic tensioning equipment for prestressed pipe pile |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911033745.7A Division CN110788987B (en) | 2019-10-28 | 2019-10-28 | Automatic tensioning equipment for prestressed pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112776165A true CN112776165A (en) | 2021-05-11 |
Family
ID=69441600
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911033745.7A Active CN110788987B (en) | 2019-10-28 | 2019-10-28 | Automatic tensioning equipment for prestressed pipe pile |
| CN202110002198.7A Withdrawn CN112776165A (en) | 2019-10-28 | 2019-10-28 | Tubular pile tensioning system and method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911033745.7A Active CN110788987B (en) | 2019-10-28 | 2019-10-28 | Automatic tensioning equipment for prestressed pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN110788987B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2318573Y (en) * | 1998-02-10 | 1999-05-12 | 许继承 | Ignition electric supply installation for water heater |
| CN102562699B (en) * | 2011-12-16 | 2014-04-30 | 中联重科股份有限公司 | Balanced valve, hydraulic cylinder expansion control loop and crane |
| CN202579378U (en) * | 2011-12-30 | 2012-12-05 | 柳州泰姆预应力机械有限公司 | Intelligent tensioning system |
| CN103437560B (en) * | 2013-06-28 | 2015-10-21 | 合肥工业大学 | Double control-type prestress tensioning equipment and using method thereof |
| CN105113417A (en) * | 2015-09-14 | 2015-12-02 | 龙力群 | Bridge prestress tensioning system |
| CN207470527U (en) * | 2017-09-19 | 2018-06-08 | 绍兴泰格机电技术有限公司 | A kind of built-in type fork truck safety valve |
| CN108126372B (en) * | 2017-12-21 | 2019-07-02 | 梁志全 | A kind of bubble separation system for industrial hot oil pipeline |
-
2019
- 2019-10-28 CN CN201911033745.7A patent/CN110788987B/en active Active
- 2019-10-28 CN CN202110002198.7A patent/CN112776165A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN110788987A (en) | 2020-02-14 |
| CN110788987B (en) | 2021-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103088933B (en) | A kind of collaborative power consumption curvature-prevention support component with large shake defencive function | |
| CN101733351B (en) | 120MN free forging oil press | |
| CN206681189U (en) | A kind of energy-dissipating and shock-absorbing support | |
| CN106968500B (en) | SMA is from restoring to throne ductility steel and supporting | |
| CN209296119U (en) | A kind of bridge intelligence freight weight limit prompt equipment | |
| CN110788987B (en) | Automatic tensioning equipment for prestressed pipe pile | |
| CN114016791B (en) | Metal friction double-yield-point composite energy dissipation support | |
| CN110965651A (en) | Assembled steel pipe truss node connecting device | |
| CN206769442U (en) | A kind of spacing bracing means of timber buildings Tenon node | |
| CN209227769U (en) | A kind of connection structure of steel structure column and steel structure girder | |
| CN110173146A (en) | The viscid composite buffer of Self-resetting | |
| CN216788379U (en) | Electromagnetic flow measuring and regulating instrument | |
| CN105443466A (en) | Hydraulic control system for quick opening cylinder and upper roll balance cylinder of steel tube straightening machine | |
| CN209323346U (en) | A kind of Overheight Vehicles hit the protective device of bridge superstructure | |
| CN211776064U (en) | Adjustable support system of precast beam component | |
| CN210598348U (en) | Self-resetting viscous composite damper | |
| CN215763833U (en) | Stainless steel pipe connecting structure reinforced by steel wrapping | |
| CN107217903B (en) | One kind controlling the departing electric pole of lower casing based on rope | |
| CN207892275U (en) | A kind of adjustable for height strut | |
| CN208309375U (en) | The connection structure of assembled architecture | |
| CN214364038U (en) | Building high-rise wind diversion structure | |
| CN212657281U (en) | Welded ball valve | |
| CN216242626U (en) | Low temperature resistant valve | |
| CN219864194U (en) | Supporting and fixing device for assembled building inclined wall | |
| CN101841265B (en) | Photovoltaic power generation apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210511 |