CN110939436A - Pressure sensing device - Google Patents
Pressure sensing device Download PDFInfo
- Publication number
- CN110939436A CN110939436A CN201911420290.4A CN201911420290A CN110939436A CN 110939436 A CN110939436 A CN 110939436A CN 201911420290 A CN201911420290 A CN 201911420290A CN 110939436 A CN110939436 A CN 110939436A
- Authority
- CN
- China
- Prior art keywords
- hole
- diaphragm
- pressure
- base
- sensing device
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 17
- 210000004907 gland Anatomy 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 239000003518 caustics Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a pressure sensing device, wherein a base is fixed in a wall body, the center of the base is provided with an axial through hole, the periphery of the base is fixedly provided with a diaphragm, the base is provided with a flow guide hole and a channel which are communicated with each other corresponding to the diaphragm, an induction cavity is arranged between the diaphragm and the flow guide hole, media are filled in the induction cavity, the flow guide hole and the channel to form a pressure transmission device, the outer side of the channel is provided with a sensor, and the sensor is fixed on the base; the diaphragm transmits pressure information to the sensor through the pressure transmission device. The pressure transmission device is used for realizing that the sensor collects and monitors the pressure information of the hole bottom through indirect action, the realization difficulty is low, the feasibility is high, the hole bottom pressure can be monitored in real time according to the information monitored by the sensor, and the stability of the hole forming quality is ensured; and the diaphragm is arranged close to the bottom of the drill hole, so that the pressure condition of the bottom of the drill hole can be accurately reflected, and an accurate pressure value is provided for a drilling operator.
Description
Technical Field
The invention relates to the field of drilling construction equipment, in particular to a pressure sensing device for detecting bottom pressure of a hole.
Background
The rotary jet grouting construction is that a drilling machine is used for drilling, a grouting pipe with a nozzle is inserted to a preset position of a soil layer, prepared slurry is used for enabling a liquid flow to obtain huge energy through a high-pressure generating device, and the slurry is jetted out from the nozzle at the edge of the grouting pipe at a high speed to form a liquid flow with highly concentrated energy, so that a soil body is directly damaged. In the rotary spraying grouting construction, the accurate monitoring of the pore bottom pressure is an important factor influencing the pore-forming quality, and the conventional rotary spraying grouting construction at present determines the pore bottom pressure data mostly according to the experience of operators, so that the subjectivity is strong, the pressure value is inaccurate, and the pore-forming quality is unstable. In the construction process of rotary spraying grouting, high-pressure slurry needs to be sprayed into a drill hole, so that the drill hole contains the high-pressure slurry and corrosive substances, if a common pressure sensor is directly installed in the drill hole, the pressure sensor can be directly damaged by the huge energy of the high-pressure slurry, a cable connected with the pressure sensor cannot be well protected in the high-pressure slurry, and the cable can be corroded and damaged by the corrosive substances in the high-pressure slurry, so that the pressure sensor fails to detect the pressure in the hole; therefore, the common pressure sensor is directly arranged at the bottom of the drilled hole, the pressure of the bottom of the drilled hole is monitored, and the realization difficulty is high and the feasibility is low.
Disclosure of Invention
The applicant provides a pressure sensing device with a reasonable structure aiming at the defects of large difficulty, low feasibility and the like of directly monitoring the pressure at the bottom of a hole due to the fact that a common pressure sensor is arranged at the bottom of the hole in the conventional rotary spraying construction, and the pressure sensing device collects pressure information at the bottom of the hole through a pressure transmission device, so that the realization difficulty is low, and the feasibility is high.
The technical scheme adopted by the invention is as follows:
a pressure sensing device is characterized in that a base is fixed in a wall body, an axial through hole is formed in the center of the base, a diaphragm is fixedly arranged on the periphery of the base, a flow guide hole and a channel which are communicated with each other are formed in the base corresponding to the diaphragm, an induction cavity is formed between the diaphragm and the flow guide hole, media are filled in the induction cavity, the flow guide hole and the channel to form a pressure transmission device, a sensor is arranged on the outer side of the channel, and the sensor is fixed on the base; the diaphragm transmits pressure information to the sensor through the pressure transmission device.
The pressure transmission device is arranged on the base, so that the deformation of the diaphragm along with the pressure change is transmitted to the sensor, the pressure information of the hole bottom is acquired and monitored by the sensor through indirect action, the realization difficulty is low, the feasibility is high, the hole bottom pressure can be monitored in real time according to the information monitored by the sensor, and the stability of the hole forming quality is ensured; and the diaphragm is arranged close to the bottom of the drill hole, so that the pressure condition of the bottom of the drill hole can be accurately reflected, and an accurate pressure value is provided for a drilling operator.
As a further improvement of the above technical solution:
the diaphragm is disposed near the bottom of the bore.
The channel is a blind hole, and the diversion hole is arranged at the bottom of the hole close to the channel.
The flow guide hole is arranged at the hole bottom close to the channel, when the diaphragm deforms along with the pressure change at the hole bottom, most of the medium flows towards the direction of the sensor to transmit the pressure change after flowing into the channel from the flow guide hole, so that the pressure change is prevented from being dispersed due to the fact that the medium flows in different directions, and the accuracy of pressure transmission is ensured.
The diaphragm comprises a deformation part in the middle and a pressing part on the periphery, and the deformation part is in a spherical crown shape formed by outward protrusion.
The diaphragm comprises a deformation part and a pressing part, wherein the middle part of the deformation part changes along with pressure, the periphery of the deformation part is used for pressing, the deformation part protrudes outwards along the radial direction to form a spherical crown shape, the cross section of the deformation part is in a circular arc shape, the induction area and the induction area of the spherical crown shape are larger, and the pressure induction on the hole bottom is more sensitive and quicker.
The diversion hole is opposite to the center of the deformation part.
The flow guide hole is over against the center of the deformation part, when the deformation part deforms along with the pressure change at the bottom of the hole, the strain at the center of the deformation part is the maximum value, and the flow guide hole is over against the center of the deformation part, so that higher sensitivity can be obtained.
The base is provided with a concave part corresponding to the diaphragm, and the induction cavity is positioned between the inner surface of the diaphragm and the inner surface of the concave part.
The concave part is in a spherical crown shape, the diversion hole is positioned at the lowest position of the center of the concave part, and the central axis of the diversion hole is superposed with the central axis of the spherical crown-shaped concave part.
The concave part is also in a spherical crown shape, the flow guide hole is positioned at the lowest position of the center of the concave part, and when the deformation part deforms, the medium can quickly flow along the inner wall surface of the spherical crown shape of the concave part, so that the pressure change value is transmitted to the sensor, and the pressure transmission is quicker.
The diaphragm is pressed and fixed on the base through the gland; the inner surface of the central hole of the gland is an arc-shaped facing corresponding to the deformation part of the diaphragm.
The facing of the gland is contacted with the deformation part of the diaphragm by the arc-shaped surface, when the deformation part deforms, the outer surface of the deformation part moves along the arc-shaped facing, the attaching area is large, and the influence on the deformation of the deformation part and the accuracy of pressure transmission due to the large stress concentration is avoided.
The pressing part of the diaphragm is an annular sheet, an annular groove is correspondingly formed in the pressing cover, and the pressing part is embedded and pressed in the groove.
The diaphragm is made of rubber.
The invention has the following beneficial effects:
the pressure transmission device is arranged on the base, so that the deformation of the diaphragm along with the pressure change is transmitted to the sensor, the pressure information of the hole bottom is acquired and monitored by the sensor through indirect action, the realization difficulty is low, the feasibility is high, the hole bottom pressure can be monitored in real time according to the information monitored by the sensor, and the stability of the hole forming quality is ensured; and the diaphragm is arranged close to the bottom of the drill hole, so that the pressure condition of the bottom of the drill hole can be accurately reflected, and an accurate pressure value is provided for a drilling operator.
The flow guide hole is arranged at the hole bottom close to the channel, when the diaphragm deforms along with the pressure change at the hole bottom, most of the medium flows towards the direction of the sensor to transmit the pressure change after flowing into the channel from the flow guide hole, so that the pressure change is prevented from being dispersed due to the fact that the medium flows in different directions, and the accuracy of pressure transmission is ensured.
The diaphragm comprises a deformation part and a pressing part, wherein the middle part of the deformation part changes along with pressure, the periphery of the deformation part is used for pressing, the deformation part protrudes outwards along the radial direction to form a spherical crown shape, the cross section of the deformation part is in a circular arc shape, the induction area and the induction area of the spherical crown shape are larger, and the pressure induction on the hole bottom is more sensitive and quicker. The flow guide hole is over against the center of the deformation part, when the deformation part deforms along with the pressure change of the bottom of the hole, the strain at the center of the deformation part is the maximum value, and the flow guide hole is over against the center of the deformation part, so that higher sensitivity can be obtained.
The concave part is also in a spherical crown shape, the flow guide hole is positioned at the lowest position of the center of the concave part, and when the deformation part deforms, the medium can quickly flow along the inner wall surface of the spherical crown shape of the concave part, so that the pressure change value is transmitted to the sensor, and the pressure transmission is quicker.
The facing of the gland is contacted with the deformation part of the diaphragm by the arc-shaped surface, when the deformation part deforms, the outer surface of the deformation part moves along the arc-shaped facing, the attaching area is large, and the influence on the deformation of the deformation part and the accuracy of pressure transmission due to the large stress concentration is avoided.
Drawings
Fig. 1 is a cross-sectional view of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: 1. a wall body; 2. a base; 3. a through hole; 4. a sensor; 5. a channel; 6. a medium; 7. a membrane; 8. a gland; 9. a plane; 10. an induction cavity; 11. a recessed portion; 12. a flow guide hole; 13. a groove; 14. veneering; 15. a deformation section; 16. a pressing part.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a base 2 of the present invention is embedded and fixed in a wall 1, the inner end of the base is correspondingly located at the bottom of a drilled hole (not shown in the figure), the center of the base 2 is provided with an axial through hole 3, and a drill rod and a drill bit of a drilling machine can extend into the through hole 3 for construction; a channel 5 is formed in the inner wall of the base 2, which is positioned on one side of the through hole 3, the channel 5 is a blind hole, and the bottom of the channel 5 is close to the inner end part of the base 2, namely the channel 5 is arranged close to the bottom of the drilled hole; a sensor 4 is arranged at the outer end of the channel 5, and the sensor 4 is fixed on the outer end face of the base 2; a flow guide hole 12 is radially arranged on the base 2 close to the hole bottom of the channel 5, the outer end part of the flow guide hole 12 on the base 2 is radially inwards recessed to form a spherical-crown-shaped recessed part 11, the flow guide hole 12 is positioned at the lowest part of the center of the recessed part 11, and the central axis of the flow guide hole is superposed with the central axis of the spherical-crown-shaped recessed part 11; a diaphragm 7 is arranged on the outer side of the concave part 11, the diaphragm 7 is arranged at the bottom of a hole close to the drilled hole and is tightly pressed and fixed on a plane 9 arranged on the periphery of the base 2 through a gland 8, an induction cavity 10 is formed between the inner surface of the diaphragm 7 and the inner surface of the concave part 11, and the induction cavity 10 is communicated with the channel 5 through a diversion hole 12; the sensing cavity 10, the flow guide hole 12 and the channel 5 are filled with media 6 to form a pressure transmission device, the pressure transmission device transmits deformation of the diaphragm 7 under the pressure action to the sensor 4 through the media 6, and the sensor 4 converts the deformation into corresponding pressure values according to received information. According to the invention, the pressure transmission device is arranged on the base 2, and the deformation of the diaphragm 7 along with the pressure change is transmitted to the sensor 4, so that the sensor 4 can acquire and monitor the pressure information of the hole bottom through indirect action, the realization difficulty is low, the feasibility is high, the hole bottom pressure can be monitored in real time according to the information monitored by the sensor 4, and the stability of the hole forming quality is ensured; moreover, the diaphragm 7 is arranged close to the bottom of the drill hole, so that the pressure condition of the bottom of the drill hole can be accurately reflected, and a pressure basis is provided for a drilling operator; the flow guide hole 12 is arranged at the inner end part close to the channel 5, when the diaphragm 7 deforms along with the pressure change at the bottom of the hole, after the medium 6 flows into the channel 5 from the flow guide hole 12, most of the medium 6 flows towards the direction of the sensor 4 to transmit the pressure change, the pressure change is prevented from being dispersed due to the fact that the medium 6 flows in the opposite direction, and the accuracy of the pressure transmission is guaranteed.
As shown in fig. 2, the diaphragm 7 is made of rubber, and can deform under the action of pressure, and includes a deformation portion 15 whose middle portion changes with the pressure and a pressing portion 16 whose periphery is used for pressing, the deformation portion 15 is formed into a spherical crown shape by bulging outward along the radial direction, and its cross section is circular arc, the sensing area and sensing area of the spherical crown shape are larger, and the pressure sensing to the hole bottom is more sensitive and faster; the deformation part 15 and the concave part 11 of the base 2 correspond to form a sensing cavity 10, the flow guide hole 12 is over against the center of the deformation part 15, when the deformation part 15 deforms along with the pressure change at the bottom of the hole, the strain at the center of the deformation part 15 is the maximum value, and the flow guide hole 12 is over against the center of the deformation part 15, so that higher sensitivity can be obtained; the concave part 11 is also in a spherical crown shape, the diversion hole 12 is positioned at the lowest position of the center of the concave part 11, when the deformation part 15 deforms, the medium 6 can flow rapidly along the spherical crown-shaped inner wall surface of the concave part 11, the pressure change value is transmitted to the sensor 4, and the pressure transmission is quicker.
As shown in fig. 2, the pressing portion 16 of the diaphragm 7 is an annular piece located at the outer periphery, an annular groove 13 is formed in the central hole of the gland 8 in a manner of being recessed radially outwards corresponding to the pressing portion 16, and the pressing portion 16 of the diaphragm 7 is embedded and pressed in the groove 13 of the gland 8. The deformation portion 15 that the central hole internal surface of gland 8 corresponds diaphragm 7 sets up to curved wainscot 14, and wainscot 14 and deformation portion 15 are the arcwall face contact, and when deformation portion 15 took place to warp, its surface moved along curved wainscot 14, and the laminating area is big, avoids taking place great stress concentration, and influences the deflection of deformation portion 15, and then influences pressure transmission's accuracy.
When the pressure sensor is actually used, the base 2 is embedded and fixed in the wall body 1, the drill rod extends into the base 2 from the through hole 3 to carry out construction on a drill hole, and the pressure sensor 4 monitors the pressure condition in the drill hole through the pressure transmission device and the diaphragm 7. The invention indirectly obtains the pressure value in the hole through the pressure transmission device, monitors the pressure in the hole and ensures the quality of the formed hole.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, as the invention may be modified in any manner without departing from the spirit thereof.
Claims (10)
1. A pressure sensing device, characterized by: the base (2) is fixed in a wall body (1), an axial through hole (3) is formed in the center of the base (2), a diaphragm (7) is fixedly arranged on the periphery of the base (2), a flow guide hole (12) and a channel (5) which are communicated with each other are formed in the base (2) corresponding to the diaphragm (7), an induction cavity (10) is formed between the diaphragm (7) and the flow guide hole (12), media (6) are filled in the induction cavity (10), the flow guide hole (12) and the channel (5) to form a pressure transmission device, a sensor (4) is arranged on the outer side of the channel (5), and the sensor (4) is fixed on the base (2); the diaphragm (7) transmits pressure information to the sensor (4) through a pressure transmission device.
2. The pressure sensing device of claim 1, wherein: the membrane (7) is arranged near the bottom of the hole of the drill hole.
3. The pressure sensing device of claim 1, wherein: the channel (5) is a blind hole, and the diversion hole (12) is arranged at the hole bottom close to the channel (5).
4. The pressure sensing device of claim 1, wherein: the diaphragm (7) comprises a middle deformation part (15) and a peripheral pressing part (16), and the deformation part (15) is in a spherical crown shape formed by outward protrusion.
5. A pressure sensing device according to claim 1 or 4, wherein: the diversion hole (12) is over against the center of the deformation part (15).
6. The pressure sensing device of claim 1, wherein: the base (2) is provided with a concave part (11) corresponding to the diaphragm (7), and the induction cavity (10) is positioned between the inner surface of the diaphragm (7) and the inner surface of the concave part (11).
7. The pressure sensing device of claim 6, wherein: the concave part (11) is in a spherical crown shape, the diversion hole (12) is positioned at the lowest part of the center of the concave part (11), and the central axis of the diversion hole is superposed with the central axis of the spherical crown-shaped concave part (11).
8. The pressure sensing device of claim 1, wherein: the diaphragm (7) is pressed and fixed on the base (2) through a gland (8); the inner surface of the central hole of the gland (8) is an arc-shaped attaching surface (14) corresponding to the deformation part (15) of the diaphragm (7).
9. The pressure sensing device of claim 1, wherein: the pressing part (16) of the diaphragm (7) is an annular sheet, an annular groove (13) is correspondingly formed in the pressing cover (8), and the pressing part (16) is embedded and pressed in the groove (13).
10. The pressure sensing device of claim 1, wherein: the diaphragm (7) is made of rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420290.4A CN110939436A (en) | 2019-12-31 | 2019-12-31 | Pressure sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420290.4A CN110939436A (en) | 2019-12-31 | 2019-12-31 | Pressure sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110939436A true CN110939436A (en) | 2020-03-31 |
Family
ID=69913778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911420290.4A Pending CN110939436A (en) | 2019-12-31 | 2019-12-31 | Pressure sensing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110939436A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535527A (en) * | 2010-12-14 | 2012-07-04 | 上海市基础工程有限公司 | Testing device and method of breast wall slurry pressure during pore-forming construction of cast-in-situ bored pile |
| CN206189476U (en) * | 2016-08-30 | 2017-05-24 | 交通运输部公路科学研究所 | Be suitable for bored concrete pile concrete placement in -process internal pressure measuring sensor |
| US20170219396A1 (en) * | 2016-02-03 | 2017-08-03 | Surpass Industry Co., Ltd. | Pressure detection device |
| CN107771274A (en) * | 2015-06-26 | 2018-03-06 | 恩德莱斯和豪瑟尔两合公司 | Pressure transmission module and the pressure sensor with pressure transmission module |
| CN109681192A (en) * | 2019-02-02 | 2019-04-26 | 江苏省无锡探矿机械总厂有限公司 | A kind of stratum slip casting feedback pressure sensing device |
| CN211258591U (en) * | 2019-12-31 | 2020-08-14 | 无锡市安曼工程机械有限公司 | Pressure sensing device |
-
2019
- 2019-12-31 CN CN201911420290.4A patent/CN110939436A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535527A (en) * | 2010-12-14 | 2012-07-04 | 上海市基础工程有限公司 | Testing device and method of breast wall slurry pressure during pore-forming construction of cast-in-situ bored pile |
| CN107771274A (en) * | 2015-06-26 | 2018-03-06 | 恩德莱斯和豪瑟尔两合公司 | Pressure transmission module and the pressure sensor with pressure transmission module |
| US20170219396A1 (en) * | 2016-02-03 | 2017-08-03 | Surpass Industry Co., Ltd. | Pressure detection device |
| CN206189476U (en) * | 2016-08-30 | 2017-05-24 | 交通运输部公路科学研究所 | Be suitable for bored concrete pile concrete placement in -process internal pressure measuring sensor |
| CN109681192A (en) * | 2019-02-02 | 2019-04-26 | 江苏省无锡探矿机械总厂有限公司 | A kind of stratum slip casting feedback pressure sensing device |
| CN211258591U (en) * | 2019-12-31 | 2020-08-14 | 无锡市安曼工程机械有限公司 | Pressure sensing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2484703A1 (en) | Apparatus for downhole measurements, and methods of using same | |
| CN101451940A (en) | Multifunctional base injection type cavitation corrosion test device | |
| CN211258591U (en) | Pressure sensing device | |
| CN210398050U (en) | Piston pressure measuring joint | |
| CN110939436A (en) | Pressure sensing device | |
| US20200208507A1 (en) | Fluid pressure measuring device for measurement-while-drilling tool | |
| WO2020215346A1 (en) | Rock triaxial direct shear test apparatus and method | |
| CN101907608B (en) | Adaptive overflow type seal shoe for ultrasonic probe | |
| CN108071377B (en) | Bridge-type mechanism small-flow long-acting water distributor | |
| CN202522357U (en) | Sensor for detecting positive braking pressure of disc brake | |
| CN106089181B (en) | A kind of shaft bottom rotating power machine condition detector | |
| CN217872755U (en) | Sleeve type downhole parameter measuring instrument | |
| CN210888922U (en) | Pressure maintaining cabin structure with glass window | |
| CN109403949A (en) | A kind of supersonic Doppler measuring production profile of oil well device | |
| CN115126476A (en) | Near-bit engineering parameter measuring tool and using method | |
| CN213331022U (en) | Blowout preventer and drilling tool | |
| CN211849372U (en) | Novel static sounding probe | |
| CN110607790B (en) | Deep sea static sounding probe | |
| CN207881774U (en) | A kind of quadrophonic ultrasonic flowmeter | |
| CN220504996U (en) | Monitoring device for a well bore | |
| CN111255408A (en) | Water injection pressure measurement blocking device | |
| CN212563205U (en) | Microphone for liquid level monitor | |
| CN220625399U (en) | Probe device of ultrasonic flowmeter | |
| CN220230784U (en) | Pressure monitoring equipment | |
| CN216865273U (en) | Monitoring platform suitable for bridge approach pile foundation integrality detects |
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 |