CN115453954A - Curing grouting pump and control method thereof - Google Patents
Curing grouting pump and control method thereof Download PDFInfo
- Publication number
- CN115453954A CN115453954A CN202211258833.9A CN202211258833A CN115453954A CN 115453954 A CN115453954 A CN 115453954A CN 202211258833 A CN202211258833 A CN 202211258833A CN 115453954 A CN115453954 A CN 115453954A
- Authority
- CN
- China
- Prior art keywords
- pressure
- grouting pump
- pressure chamber
- value
- pneumatic
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims description 14
- 238000002955 isolation Methods 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000007569 slipcasting Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000010365 information processing Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000009435 building construction Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses building construction equipment, and aims to provide a curing grouting pump, which comprises a shell, an air compressor and a pneumatic grouting pump, wherein the air compressor provides working power for the pneumatic grouting pump, the curing grouting pump also comprises an electric control air inlet valve, a pressure sensor, a central control assembly and an air duct, a low-pressure chamber and a high-pressure chamber are arranged in the pneumatic grouting pump, the electric control air inlet valve is used for adjusting the air pressure in the low-pressure chamber, the pressure sensor is used for monitoring the air pressure entering the low-pressure chamber, the central control assembly is used for collecting the pressure value of the low-pressure chamber, calculating the opening control value of the electric control air inlet valve and controlling the opening size of the electric control air inlet valve, the central control assembly comprises an optical coupling isolation circuit, a single chip microcomputer and an A/D converter, the optical coupling isolation circuit is used for electrically isolating the central control system from the electric control air inlet valve and the pressure sensor, and the single chip microcomputer is used for receiving parameter input, outputting data required to be displayed by the central control system and calculating the opening control value of the electric control air inlet valve.
Description
Technical Field
The invention relates to the field of building construction equipment, in particular to a curing grouting pump and a control method thereof.
Background
The grouting pump is used for stirring 3 curing materials and water in a stirrer according to a certain proportion to form curing slurry, the curing slurry is pumped into a pipeline through a hydraulic conveying cylinder and is conveyed to a working surface through the pipeline, grouting construction is a commonly used reinforcing means in dam foundation construction at home and abroad, and grouting pressure is one of key parameters influencing grouting quality.
Because the factors such as nonlinearity, uncertainty of stratum change and the like exist in the grouting process, a high-pressure grouting mode can occur in the grouting process, and at present, the following problems mainly exist in the grouting construction process: 1. due to the reasons of unstable discharge flow, small lift and the like of the grouting pump, the field grouting pressure is unstable, and the quality of grouting operation is influenced; 2. the control method of the grouting pressure mainly adopts a control method consisting of an electric grouting pump and a pressure regulating valve, the grouting pressure is small, and the ultrahigh pressure grouting mode under special conditions cannot be achieved, so that the grouting construction requirement of a dam cannot be met, and a curing grouting pump capable of automatically regulating the pressure is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a curing grouting pump and a control method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a solidification grouting pump, which comprises a housin, set up in the air compressor of casing and set up the pneumatic grouting pump in the casing, air compressor provides operating power for pneumatic grouting pump, solidification grouting pump still includes the pressure control module, the pressure control module includes automatically controlled admission valve, pressure sensor, well accuse subassembly and air duct, be provided with low pressure cavity and high-pressure cavity in the pneumatic grouting pump, automatically controlled admission valve sets up on the air duct, and be used for adjusting the air pressure of low pressure cavity, pressure sensor sets up on the air duct, and be used for monitoring the air pressure that gets into the low pressure cavity, well accuse subassembly and automatically controlled admission valve, pressure sensor electric connection, and be used for collecting the pressure value of low pressure cavity, and calculate the aperture control value of automatically controlled admission valve and control the aperture size of automatically controlled admission valve.
The invention is further configured to: well accuse subassembly includes opto-isolator circuit, singlechip and AD converter, opto-isolator circuit is used for with center control system and automatically controlled admission valve, pressure sensor carries out the electricity and keeps apart, the singlechip is used for receiving parameter input, the data that the output center control system needs to show and calculate the aperture control value of automatically controlled admission valve, well accuse subassembly still includes input port, output port and display, the input port and the input device of singlechip are connected, the output port and the display of singlechip are connected, input device is used for setting for the slip casting operation pressure value that pneumatic grouting pump needs to export, the display is used for showing pressure value and operating condition in the pneumatic grouting pump.
The invention is further configured to: the central control system is connected with an alarm used for alarming when the pressure control is abnormal, and the electric control air inlet valve is an electric control pressure regulator.
The invention is further configured to: a control method suitable for a solidification grouting pump is characterized by comprising the following steps,
s1, presetting an information stage, inputting an operation pressure value required to be output by a pneumatic grouting pump to a central control system through input equipment, and simultaneously inputting a pressure ratio of a low-pressure chamber and a high-pressure chamber of the pneumatic grouting pump;
s2, in an information acquisition stage, a pressure sensor obtains an air pressure value in an air duct connected with a low-pressure chamber of the pneumatic grouting pump through monitoring, and a central control system acquires the air pressure value information;
s3, in an information transmission stage, the air pressure value in the step S2 is input to an A/D converter through an optical coupling isolation circuit, digital-to-analog conversion is carried out on the air pressure value through the A/D converter, and then the air pressure value is input to a single chip microcomputer;
s4, in the information processing stage, the singlechip calculates an opening control value of the electric control air inlet valve according to the operation pressure value and the pressure ratio in the step S1 and the air pressure value in the step S2;
and S5, in the working stage of the curing grouting pump, the central control system transmits the opening control value in the step S4 to the electric control air inlet valve through the optical coupling isolation circuit, and the pressure of the low-pressure chamber of the pneumatic grouting pump is adjusted by controlling the opening of the electric control air inlet valve, so that the grouting pressure output of the high-pressure chamber of the pneumatic grouting pump is realized.
By adopting the technical scheme, the invention has the following advantages: 1. because the air inlet pipeline of the pneumatic grouting pump is provided with the electric control air inlet valve and the pressure sensor, the pressure control module calculates the opening control value of the electric control air inlet valve and controls the opening of the electric control air inlet valve by acquiring the air pressure value in the low-pressure cavity of the pneumatic grouting pump and combining the required grouting operation pressure value and the pressure ratio of the low-pressure cavity to the high-pressure cavity, the accuracy and the stability of regulating and controlling the ultrahigh-pressure grouting pressure are enhanced, and the grouting operation quality is also improved; 2. because the pneumatic grouting pump uses compressed air as power, when the phenomenon of pipe blockage occurs in the working process, the air pressure can not press the slurry out of the pneumatic pump, so that the grouting pressure can not rise along with the increase of time, and the problem of high-pressure pipe burst of a grouting pipeline is avoided; 3. because the front-end equipment of the work system of the curing grouting pump adopts weak current control, and the weak current grouting system is electrically isolated from the high voltage at the front end of the pressure control module through the optical coupling isolation circuit, casualty accidents caused by electric shock can not occur when an operator performs grouting operation, and the safety of the operator in using the grouting system is improved.
Drawings
FIG. 1 is a structural frame diagram of an embodiment of a curing grouting pump of the present invention.
Detailed Description
An embodiment of a curing grouting pump and a control method thereof according to the present invention will be further described with reference to fig. 1.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an orientation of upper and lower. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
A curing grouting pump comprises a shell, an air compressor arranged in the shell and a pneumatic grouting pump arranged in the shell, wherein the air compressor provides working power for the pneumatic grouting pump, the curing grouting pump also comprises a pressure control module, the pressure control module comprises an electric control air inlet valve, a pressure sensor, a central control assembly and an air duct, a low-pressure chamber and a high-pressure chamber are arranged in the pneumatic grouting pump, the electric control air inlet valve is arranged on the air duct and used for adjusting the air pressure of the low-pressure chamber, the pressure sensor is arranged on the air duct and used for monitoring the air pressure entering the low-pressure chamber, the central control assembly is electrically connected with the electric control air inlet valve and the pressure sensor and used for collecting the pressure value of the low-pressure chamber, calculating the opening control value of the electric control air inlet valve and controlling the opening size of the electric control air inlet valve, the pneumatic grouting pump mainly comprises a low-pressure chamber for containing compressed air and a high-pressure chamber for containing grouting slurry, and is used for controlling the grouting pressure in the high-pressure chamber through the pneumatic pressure in the low-pressure chamber, an electrically-controlled air inlet valve and a pressure sensor are arranged on an air inlet pipeline connected with the low-pressure chamber of the pneumatic grouting pump, a pressure control module monitors and collects the pressure value of the compressed air in the low-pressure chamber of the pneumatic grouting pump in real time through the pressure sensor, and calculates the opening control value of the electrically-controlled air inlet valve and controls the opening of the electrically-controlled air inlet valve by combining the grouting operation pressure value required to be provided by the high-pressure chamber of the pneumatic grouting pump and the pressure ratio of the low-pressure chamber and the high-pressure chamber of the pneumatic grouting pump (wherein the grouting operation pressure value is the initial set output pressure value, and the pressure ratio is the constant value of the pneumatic grouting pump), can keep the slip casting operation output pressure stability of pneumatic grouting pump high pressure cavity, simultaneously, because the pneumatic pump uses compressed air as power, when the phenomenon of stifled pipe appears in the course of the work, atmospheric pressure just can't be with thick liquid extrusion pneumatic pump, make slip casting pressure can not rise along with the time increase, the emergence of slip casting pipeline high pressure booster problem has been avoided, and, set up pressure sensor on the admission line of pneumatic grouting pump, the atmospheric pressure size that the monitoring obtained is more accurate than the pressure size of direct monitoring pipeline thick liquid.
The middle control assembly comprises an optical coupling isolation circuit, a singlechip and an A/D converter, the optical coupling isolation circuit is used for electrically isolating the middle control system from the electric control air inlet valve and the pressure sensor, the singlechip is used for receiving parameter input and outputting data required to be displayed by the middle control system and calculating an opening control value of the electric control air inlet valve, the middle control assembly also comprises an input port, an output port and a display, the input port of the singlechip is connected with input equipment, the output port of the singlechip is connected with the display, the input equipment is used for setting a grouting operation pressure value required to be output by the pneumatic grouting pump and displaying a working state in the pneumatic grouting pump, the interference of high voltage of the pressure control module on the electric control air inlet valve and the pressure sensor using low voltage can be effectively prevented by adopting the optical coupling isolation circuit, the accuracy of monitoring pressure of the pressure sensor and controlling the opening of the electric control air inlet valve is favorably improved, the input port and the input port of the singlechip are respectively connected with input equipment and the display, the input equipment is used for setting the grouting operation pressure value required by the pneumatic grouting pump when the operation is carried out on the operation surface of different regions, the different geological conditions, the initial grouting operation pressure control module is used as the initial pressure control operation pressure control input of the grouting operation control module, the initial pressure control operation pressure control module and the initial pressure control operation parameter value of the initial operation control operation pressure control operation of the grouting operation control module, the pressure ratio of the low-pressure chamber to the high-pressure chamber is 1:50 the pneumatic grouting pump provides better construction operation effect.
The equipment of the grouting system is controlled by weak current, the weak current grouting system is electrically isolated from the high voltage at the front end of the pressure control module through the optical coupling isolation circuit, and although the air compressor adopts conventional voltage, the operator can perform grouting operation more frequently to contact with the equipment at the front end of the grouting system, so that casualties can not occur due to electric shock when the operator performs grouting operation, and the safety of the operator in using the grouting system is improved.
A control method for a curing grouting pump, comprising the steps of:
s1, presetting an information stage, inputting an operation pressure value required to be output by a pneumatic grouting pump to a central control system through input equipment, and simultaneously inputting a pressure ratio of a low-pressure chamber and a high-pressure chamber of the pneumatic grouting pump;
s2, in an information acquisition stage, a pressure sensor obtains an air pressure value in an air duct connected with a low-pressure chamber of the pneumatic grouting pump through monitoring, and a central control system acquires the air pressure value information;
s3, in the information transmission stage, the air pressure value in the step S2 is input to an A/D converter through an optical coupling isolation circuit, and then is subjected to digital-to-analog conversion by the A/D converter and then is input to a single chip microcomputer;
s4, in the information processing stage, the singlechip calculates an opening control value of the electric control air inlet valve according to the operation pressure value and the pressure ratio in the step S1 and the air pressure value in the step S2;
and S5, in the working stage of the curing grouting pump, the central control system transmits the opening control value in the step S4 to the electric control air inlet valve through the optical coupling isolation circuit, and adjusts the pressure of the low-pressure chamber of the pneumatic grouting pump by controlling the opening size of the electric control air inlet valve, so that the grouting pressure output of the high-pressure chamber of the pneumatic grouting pump is realized.
In the step S1, according to the actual construction site operation condition and the actual soil condition around the dam, the required operation pressure value is pre-calculated and set, the adaptive applicable grouting pressure for different regional conditions can be ensured, the applicability of the machine equipment is improved, the pressure ratio of the low-pressure chamber and the high-pressure chamber of the pneumatic grouting pump is set, and the stable operation pressure of the pneumatic grouting pump can be ensured through the ratio.
In the step S2, the pressure control module detects each pressure value of the real-time equipment, and simultaneously stores data information in the central control assembly to prepare for the subsequent calculation of the opening size of the electric control air inlet valve.
In the steps S3, S4 and S5, the detection data are calculated and converted, and the data value pressure control system comprises an optical coupling isolation circuit, a single chip microcomputer and an A/D converter; the optical coupling isolation circuit is used for electrically isolating the pressure control system from the electric control air inlet valve and the pressure sensor; the single chip microcomputer is used for receiving data required to be displayed by the parameter input and output pressure control system and calculating an opening control value of the electronic control air inlet valve, and the optical coupling isolation circuit can effectively prevent the high voltage of the pressure control system from interfering the electronic control air inlet valve and the pressure sensor which use low voltage, so that the pressure monitoring precision of the pressure sensor and the precision of controlling the opening of the electronic control air inlet valve are improved.
The above description is only a preferred embodiment of the present invention and should not be construed as limiting the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.
Claims (4)
1. The utility model provides a solidification grouting pump, includes the casing, sets up in the air compressor of casing and sets up the pneumatic grouting pump in the casing, air compressor provides operating power, its characterized in that for pneumatic grouting pump: solidification grouting pump still includes the pressure control module, the pressure control module includes automatically controlled admission valve, pressure sensor, well accuse subassembly and vent pipe, be provided with low pressure chamber and high-pressure chamber in the pneumatic grouting pump, automatically controlled admission valve sets up on vent pipe, and is used for adjusting the air pressure of low pressure chamber, pressure sensor sets up on vent pipe, and is used for monitoring the air pressure that gets into the low pressure chamber, well accuse subassembly and automatically controlled admission valve, pressure sensor electric connection, and be used for collecting the pressure value of low pressure chamber to calculate the aperture control value of automatically controlled admission valve and the aperture size of controlling automatically controlled admission valve.
2. The curing grouting pump of claim 1, wherein: well accuse subassembly includes opto-isolator circuit, singlechip and AD converter, opto-isolator circuit is used for carrying out the electrical isolation with center control system and automatically controlled admission valve, pressure sensor, the singlechip is used for receiving parameter input, the data that output center control system needs to show and calculates the aperture control value of automatically controlled admission valve, well accuse subassembly still includes input port, output port and display, the input port and the input device of singlechip are connected, and the output port and the display of singlechip are connected, input device is used for setting for the slip casting operation pressure value that pneumatic grouting pump needs the output, the display is used for showing pressure value and operating condition in the pneumatic grouting pump.
3. The curing grouting pump of claim 2, wherein: the central control system is connected with an alarm which is used for alarming when the pressure control is abnormal, and the electric control air inlet valve is an electric control pressure regulator.
4. A method of controlling a curing grouting pump suitable for use in a curing grouting pump according to claims 1-3, characterised by the steps of:
s1, in an information presetting stage, inputting an operation pressure value required to be output by a pneumatic grouting pump into a central control system through input equipment, and simultaneously inputting a pressure ratio of a low-pressure chamber to a high-pressure chamber of the pneumatic grouting pump;
s2, in an information acquisition stage, a pressure sensor obtains an air pressure value in an air duct connected with a low-pressure chamber of the pneumatic grouting pump through monitoring, and a central control system acquires the air pressure value information;
s3, in the information transmission stage, the air pressure value in the step S2 is input to an A/D converter through an optical coupling isolation circuit, and then is subjected to digital-to-analog conversion by the A/D converter and then is input to a single chip microcomputer;
s4, in the information processing stage, the singlechip calculates an opening control value of the electric control air inlet valve according to the operation pressure value and the pressure ratio in the step S1 and the air pressure value in the step S2;
and S5, in the working stage of the curing grouting pump, the central control system transmits the opening control value in the step S4 to the electric control air inlet valve through the optical coupling isolation circuit, and adjusts the pressure of the low-pressure chamber of the pneumatic grouting pump by controlling the opening size of the electric control air inlet valve, so that the grouting pressure output of the high-pressure chamber of the pneumatic grouting pump is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211258833.9A CN115453954A (en) | 2022-10-14 | 2022-10-14 | Curing grouting pump and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211258833.9A CN115453954A (en) | 2022-10-14 | 2022-10-14 | Curing grouting pump and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115453954A true CN115453954A (en) | 2022-12-09 |
Family
ID=84310092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211258833.9A Withdrawn CN115453954A (en) | 2022-10-14 | 2022-10-14 | Curing grouting pump and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115453954A (en) |
-
2022
- 2022-10-14 CN CN202211258833.9A patent/CN115453954A/en not_active Withdrawn
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102011012946A1 (en) | Adjustment of pressure in a vehicle tire | |
| CN2466390Y (en) | Industrial process flow intelligent pump | |
| CN115453954A (en) | Curing grouting pump and control method thereof | |
| CN111852834A (en) | Water pump management and control method for foundation pit dewatering system | |
| CN109237111B (en) | Pressure regulating hydraulic system of self-balancing pressure regulating valve and control method thereof | |
| CN206749123U (en) | Clamping die device | |
| CN113359887B (en) | Ultrahigh-pressure grouting pressure control device and control method | |
| CN210065982U (en) | Novel high-pressure cavity air inlet and outlet device | |
| CN112344607B (en) | Intelligent control method for obtaining optimal recovery speed of refrigerant recovery machine | |
| CN211257144U (en) | Energy-saving water supply equipment for excess protection inspection | |
| CN210686508U (en) | Prevent leaking hydraulic system and hydraulic means based on pressure is compared | |
| CN207541480U (en) | A kind of vacuum ply rolling composite metal plate slab vacuum prepares automatic detection and control device | |
| CN210326079U (en) | Intelligent control waveguide inflator | |
| CN108894966B (en) | Constant pressure control system and method for chemical grouting pump | |
| CN106200703A (en) | A kind of hydraulic pressure constant voltage control method controlled based on PLC | |
| CN212772378U (en) | Foundation pit support structure supporting axial force servo system | |
| CN206131327U (en) | Long -range controllable constant pressure water supplementing device | |
| CN206573950U (en) | Tiny structure automaton in a kind of potassium sulfate reative cell based on DCS | |
| CN106681384B (en) | Low-pressure intelligent regulation control device for vacuum container | |
| CN116906339B (en) | Controllable piezoelectric pump for pressure injection device and pressure control method | |
| CN205038482U (en) | Four -wheel location intelligent terminal based on radio communication | |
| CN118564527B (en) | Straightening machine servo valve diagnosis method and system | |
| CN212030905U (en) | Pressure regulating valve test system | |
| CN218747770U (en) | Water pumping structure for welding robot | |
| CN220513501U (en) | Novel filter press controller |
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 |
Application publication date: 20221209 |
|
| WW01 | Invention patent application withdrawn after publication |