CN115681725A - Equipment supporting device for geological engineering investigation - Google Patents

Equipment supporting device for geological engineering investigation Download PDF

Info

Publication number
CN115681725A
CN115681725A CN202211630276.9A CN202211630276A CN115681725A CN 115681725 A CN115681725 A CN 115681725A CN 202211630276 A CN202211630276 A CN 202211630276A CN 115681725 A CN115681725 A CN 115681725A
Authority
CN
China
Prior art keywords
bevel gear
groove
rod
sliding block
supporting 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
Application number
CN202211630276.9A
Other languages
Chinese (zh)
Inventor
韩伟
魏海东
毕雯雯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Institute of Geological Surveying and Mapping
Original Assignee
Shandong Institute of Geological Surveying and Mapping
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Institute of Geological Surveying and Mapping filed Critical Shandong Institute of Geological Surveying and Mapping
Priority to CN202211630276.9A priority Critical patent/CN115681725A/en
Publication of CN115681725A publication Critical patent/CN115681725A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The invention discloses an equipment supporting device for geological engineering exploration, which belongs to the technical field of supporting devices and comprises a connecting bearing, wherein a plurality of fixing rods are fixedly arranged on the outer ring outer wall of the connecting bearing respectively, a groove is formed in the bottom end of each fixing rod, a lead screw is arranged in the groove in a matched mode, a screw is arranged on the lead screw in a threaded matched mode, a vertical rod is fixedly arranged at the bottom end of the screw, a long groove is formed in the bottom end of the vertical rod, a supporting rod is arranged in the long groove in a matched mode, and the supporting rod is connected with the inner wall of the top end of the long groove through a spring.

Description

Equipment supporting device for geological engineering investigation
Technical Field
The invention belongs to the technical field of supporting devices, and particularly relates to an equipment supporting device for geological engineering exploration.
Background
The geological exploration is based on geological observation research, according to task requirements, and with shorter time and less workload, a principle of obtaining more and better geological results is adopted, necessary technical means or methods are selected, such as mapping, geophysical exploration, geochemical prospecting, drilling, pit exploration, sampling test, geological remote sensing and the like, a large amount of equipment and instruments are required in the exploration, and the equipment and the instruments need to be assisted by using a supporting device; however, the geology is not all flat ground, for example, two supporting points are on the flat ground, but the other supporting point is not on the flat ground, at this time, the supporting device needs to be moved, or the equipment is moved to other places, or objects are padded under the supporting equipment, long-time adjustment is needed in the placing process, and time is wasted, so that the supporting device for the equipment for geological engineering exploration is designed.
Disclosure of Invention
In order to solve the above-mentioned deficiencies in the prior art, the present invention provides an apparatus supporting device for geological engineering investigation.
The application provides an equipment strutting arrangement for geological engineering investigation, including connecting the bearing, the outer loop outer wall of connecting the bearing is the several dead levers of fixed mounting respectively, the recess is seted up to the dead lever bottom, the recess fit is equipped with the lead screw, screw-thread fit is equipped with the screw on the lead screw, the vertical pole of bottom fixed mounting of screw, rectangular groove is seted up to the bottom of vertical pole, rectangular inslot cooperation is equipped with branch, the bottom movable mounting universal wheel of branch, pass through spring coupling between branch and the rectangular groove top inner wall, one side of branch, the jack is all seted up to one side of vertical pole, the jack fit is equipped with the inserted bar, the cooperation of connecting the bearing top is equipped with the carousel, the cooperation is equipped with support height adjustment mechanism on the connecting the bearing, the carousel is connected with support height adjustment mechanism, and can drive support height adjustment mechanism and rotate, support height adjustment mechanism top cooperation installation places the board, it is equipped with fixed establishment to place the cooperation on the board.
Specifically, the supporting height adjusting mechanism comprises a threaded sleeve, the threaded sleeve is installed on the inner wall of an inner ring of the connecting bearing, the top end of the threaded sleeve is connected with the bottom end of the rotary table, a through hole is formed in the circle center of the rotary table, a threaded rod is arranged in the threaded sleeve in a matched mode and penetrates through the through hole, the top end of the threaded rod is movably connected with the bottom end of the placing plate, and the placing plate is connected with the rotary table through a spring telescopic rod.
Specifically, a support block is fixedly installed on the top surface of the turntable, a rotating shaft is installed on a top end bearing of the support block, a first bevel gear is fixedly installed at one end of the rotating shaft, a second bevel gear is installed on the top end bearing of the turntable and concentrically placed with the through hole, a threaded rod penetrates through the second bevel gear, a limiting groove is formed in one side of the threaded rod, a limiting block is fixedly installed on the inner wall of the second bevel gear, the limiting block is inserted into the limiting groove, and the second bevel gear is meshed with and matched with the first bevel gear.
Specifically, the bottom of carousel set up the ring channel, the top fixed mounting of dead lever links the piece, links the top fixed mounting sliding block of piece, the sliding block inserts to the ring channel in.
Specifically, the sections of the annular groove and the sliding block are both dovetail-shaped.
Specifically, the fixing mechanism comprises a placing groove formed in the top surface of the placing plate, a sliding block is matched in the placing groove, the sliding block is connected with the placing groove through a spring, a first blocking plate is fixedly installed at the top end of the sliding block, and a second blocking plate is fixedly installed on one side of the top end of the placing plate.
Compared with the prior art, the invention has the following beneficial effects:
the equipment is placed on the placing plate, the equipment is fixed on the placing plate through the fixing mechanism, when the height of the equipment is required to be adjusted, the supporting height adjusting mechanism drives the placing plate, the equipment is adjusted in height, the measurement requirements of exploration at different heights are met, the equipment can be directly changed in direction by rotating the rotary table, a supporting device in the prior art is not required to be moved and carried at the same time, the effect of direction change is achieved, the operation is simple and convenient, the ground at a measuring point is flat in three places, when one place is obstructed, the screw rod is rotated, the nut drives the vertical rod, the support rod moves below the fixed rod, the vertical rod and the support rod avoid the obstacles, when the obstacles exist in height and cannot be avoided, the inserted rod is moved out of the insertion hole in the support rod, the vertical rod is separated from the support rod, the support rod can move up and down in the vertical rod under the action of the spring, the universal wheel moves to the top of the obstacle, the support rod moves towards the vertical rod, the use length of the support rod is shortened, the support rod can be stably kept through the cooperation with the rotary table, the stable adjustment of the universal wheel, the equipment can be more convenient to move, the whole measurement operation, the equipment can be more convenient to move, the operation, the measurement time, and the measurement can be more convenient to carry out, the measurement in the operation, the measurement in the use, the whole measurement time, the measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention; FIG. 2 is a view in the direction A of FIG. 1; fig. 3 is a view from direction B of fig. 1.
Reference numerals
1. Connecting a bearing; 2. fixing the rod; 3. a groove; 4. a screw rod; 5. a vertical rod; 6. a strut; 7. a universal wheel; 8. a jack; 9. inserting a rod; 10. a turntable; 11. placing the plate; 12. a threaded sleeve; 13. a threaded rod; 14. a spring telescopic rod; 15. supporting a block; 16. a rotating shaft; 17. a first bevel gear; 18. a second bevel gear; 19. defining a slot; 20. an annular groove; 21. connecting blocks; 22. a placement groove; 23. a first barrier plate; 24. a second barrier plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A supporting device for geological engineering exploration equipment is shown in figures 1-3 and comprises a connecting bearing 1, wherein a plurality of fixing rods 2 are fixedly arranged on the outer ring outer wall of the connecting bearing 1 respectively, the fixing rods 2 are uniformly distributed in the circle center of the connecting bearing 1, at least three fixing rods 2 are provided, the application is explained by four fixing rods 2, a groove 3 is formed in the bottom end of each fixing rod 2, a lead screw 4 is arranged in the groove 3 in a matched mode, one end of the lead screw 4 penetrates through one end of each fixing rod 2, a screw is arranged on each lead screw 4 in a threaded matched mode, a vertical rod 5 is fixedly arranged at the bottom end of each screw, the width of each vertical rod 5 is larger than that of the groove 3, a long groove is formed in the bottom end of each vertical rod 5, a supporting rod 6 is arranged in the long groove in a matched mode, a universal wheel 7 is movably arranged at the bottom end of each supporting rod 6, the supporting rods 6 are connected with the inner wall of the top end of the long groove through springs, one side of each supporting rod 6 and one side of each vertical rod 5 are provided with a jack 8, the inserting rods 9 are arranged in the inserting holes 8 in a matched mode, the inserting rods 9 penetrate through the inserting holes 8 in the two vertical rods 5 and are inserted into the inserting holes 8 in the supporting rods 6, the vertical rods 5 and the supporting rods 6 are fixedly supported at the moment, after the inserting rods 9 are moved out of the inserting holes in the supporting rods 6, the supporting rods 6 can move up and down in the vertical rods 5 under the action of springs, namely when one of the positions is higher than the other three positions, the supporting rods 6 perform height adjustment in the vertical rods 5 at the moment to stably support equipment above, a rotary table 10 is arranged above the connecting bearing 1 in a matched mode, a supporting height adjusting mechanism is arranged on the connecting bearing 1 in a matched mode, the rotary table 10 is connected with the supporting height adjusting mechanism and can drive the supporting height adjusting mechanism to rotate, a placing plate 11 is arranged at the top end of the supporting height adjusting mechanism in a matched mode, and a fixing mechanism is arranged on the placing plate 11 in a matched mode, after the equipment is placed on the placing plate 11, the fixing mechanism locks and fixes the equipment, and the equipment is prevented from moving. The equipment is placed on the placing plate 11, the equipment is fixed on the placing plate 11 through the fixing mechanism, when the height of the equipment is required to be adjusted, the supporting height adjusting mechanism drives the placing plate 11 and the equipment to adjust the height so as to meet the measurement requirements of different heights for exploration, and by rotating the turntable 10, can directly change the direction of the equipment without moving and carrying the supporting device and the equipment in the prior art simultaneously, so as to achieve the effect of azimuth change, the operation is simple and convenient, and three parts of the ground at the measuring point are flat, when one part has an obstacle, the screw rod 4 is rotated, the screw drives the vertical rod 5 and the support rod 6 to move under the fixed rod 2, so that the vertical rod 5 and the support rod 6 avoid the obstacle, when the obstacle has a height and can not avoid, the inserting rod 9 is moved out of the inserting hole 8 on the supporting rod 6, at the moment, the vertical rod 5 is separated from the supporting rod 6, under the action of the spring, the supporting rod 6 can move up and down in the vertical rod 5, the universal wheel 7 moves to the top of the obstacle, the supporting rod 6 moves towards the top of the vertical rod 5, the using length of the vertical rod 5 and the supporting rod 6 is shortened at the moment, but through the matching with the rest vertical rods 5 and the supporting rods 6, the turntable 10 can be kept stable, the equipment can be kept stable, and the turntable can be used for realizing the purpose of stabilizing the turntable 10 in geological exploration, aiming at different conditions, different operation modes are selected, so that the equipment is kept stable, the time is saved, more time can be used for measurement, the data is more accurate during measurement, the orientation adjustment is more convenient, the whole supporting device is not required to be moved, when the equipment above the device is moved, the device can be more conveniently pushed to move through the universal wheels 7, the operation is simple, and the device is more convenient to use.
Specifically, this embodiment the support height guiding mechanism include swivel nut 12, swivel nut 12 installs on the inner ring inner wall of connection bearing 1, and the top and the carousel 10 bottom of swivel nut 12 are connected, and the through-hole is seted up to the centre of a circle of carousel 10, and the swivel nut 12 fit in is equipped with threaded rod 13, and threaded rod 13 passes the through-hole, threaded rod 13 the top with place 11 bottom swing joint of board, place and be connected through spring telescopic link 14 between board 11 and the carousel 10. The centre of a circle of swivel nut 12 is placed with the centre of a circle of carousel 10 is concentric, carousel 10 rotates and drives swivel nut 12 and rotates, the part that drives the top rotates in step, the position of adjustment top equipment, rotate threaded rod 13, and fixed carousel 10, threaded rod 13 rebound or downstream this moment, the height of board 11 is placed in the adjustment, satisfy the equipment height adjustment needs, effect through spring telescopic link 14, can avoid placing board 11 and rotate at will, and also can increase the stability of placing board 11 through spring telescopic link 14.
Furthermore, in the embodiment, a support block 15 is fixedly mounted on the top surface of the turntable 10, a rotating shaft 16 is mounted at the top end of the support block 15 through a bearing, a first bevel gear 17 is fixedly mounted at one end of the rotating shaft 16, a second bevel gear 18 is mounted at the top end of the turntable 10 through a bearing, the second bevel gear 18 is concentrically arranged with the through hole, the threaded rod 13 passes through the second bevel gear 18, a limiting groove 19 is formed in one side of the threaded rod 13, a limiting block is fixedly mounted on the inner wall of the second bevel gear 18, the limiting block is inserted into the limiting groove 19, and the second bevel gear 18 is engaged with the first bevel gear 17. The inner wall of the inner ring of the bearing is connected with the periphery of the rotating shaft 16, the outer wall of the outer ring of the bearing is connected with the top end of the supporting block 15, the rotating shaft 16 is rotated to drive the first bevel gear 17 to rotate, the first bevel gear 17 is meshed and matched with the second bevel gear 18 to drive the second bevel gear 18 to rotate, the threaded rod 13 can be driven to rotate through the matching of the limiting groove 19 and the limiting block, the situation that a hand directly rotates the threaded rod 13 and is injured due to threads is avoided, when the distance between the placing plate 11 and the rotating disc 10 is short, the distance between the placing plate 11 and the rotating disc 10 can be far through rotating the rotating shaft 16, and the bearing is more convenient compared with the hand.
Still further, the bottom of the rotary disk 10 described in this embodiment is provided with an annular groove 20, the top end of the fixing rod 2 is fixedly provided with a connecting block 21, the top end of the connecting block 21 is fixedly provided with a sliding block, and the sliding block is inserted into the annular groove 20. Through the support of even piece 21, sliding block, can support carousel 10, also avoid carousel 10 to rock in the rotation emergence simultaneously, make carousel 10 in use more stable.
Furthermore, the section of the annular groove 20 and the section of the sliding block are both dovetail-shaped. The dovetail sliding block is matched with the annular groove 20, so that the sliding block can be prevented from moving out of the annular groove 20, and the structure is firmer.
Furthermore, the fixing mechanism comprises a placing groove 22 formed in the top surface of the placing plate 11, a sliding block is matched in the placing groove 22, the sliding block is connected with the placing groove 22 through a spring, a first blocking plate 23 is fixedly installed at the top end of the sliding block, and a second blocking plate 24 is fixedly installed on one side of the top end of the placing plate 11. The placing groove 22 is located in the middle of the placing plate 11, the equipment is placed between the first blocking plate 23 and the second blocking plate 24, the force of the first blocking plate 23 moving towards the second blocking plate 24 is always given to the second blocking plate 24 through the spring, the equipment is limited between the first blocking plate 23 and the second blocking plate 24, the operation is simple, the fixing effect is obvious, and the taking and placing are convenient.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (6)

1. The utility model provides an equipment strutting arrangement for geological engineering investigation which characterized in that: including coupling bearing (1), the outer loop outer wall of coupling bearing (1) is several dead levers (2) of fixed mounting respectively, recess (3) are seted up to dead lever (2) bottom, recess (3) fit in is equipped with lead screw (4), screw-thread fit is equipped with the screw on lead screw (4), vertical pole (5) of bottom fixed mounting of screw, rectangular groove is seted up to the bottom of vertical pole (5), rectangular inslot cooperation is equipped with branch (6), the bottom movable mounting universal wheel (7) of branch (6), pass through spring coupling between branch (6) and the rectangular groove top inner wall, one side of branch (6), jack (8) are all seted up to one side of vertical pole (5), jack (8) fit in is equipped with inserted bar (9), coupling bearing (1) top cooperation is equipped with carousel (10), the cooperation is equipped with support height adjustment mechanism on coupling bearing (1), carousel (10) are connected with support height adjustment mechanism, and can drive support height adjustment mechanism and rotate, support height adjustment mechanism top cooperation installation place board (11), it is equipped with fixed establishment to place on board (11).
2. The apparatus supporting device for geological engineering exploration, according to claim 1, wherein: the supporting height adjusting mechanism comprises a threaded sleeve (12), the threaded sleeve (12) is installed on the inner ring inner wall of the connecting bearing (1), the top end of the threaded sleeve (12) is connected with the bottom end of the rotary table (10), a through hole is formed in the circle center of the rotary table (10), a threaded rod (13) is arranged in the threaded sleeve (12) in a matched mode, the threaded rod (13) penetrates through the through hole, the top end of the threaded rod (13) is movably connected with the bottom end of the placing plate (11), and the placing plate (11) is connected with the rotary table (10) through a spring telescopic rod (14).
3. The apparatus supporting device for geological engineering investigation of claim 1 or 2, wherein: a supporting block (15) is fixedly mounted on the top surface of the rotary disc (10), a rotating shaft (16) is mounted at the top end of the supporting block (15) in a bearing mode, a first bevel gear (17) is fixedly mounted at one end of the rotating shaft (16), a second bevel gear (18) is mounted at the top end of the rotary disc (10) in a bearing mode, the second bevel gear (18) and the through hole are concentrically arranged, the threaded rod (13) penetrates through the second bevel gear (18), a limiting groove (19) is formed in one side of the threaded rod (13), a limiting block is fixedly mounted on the inner wall of the second bevel gear (18) and inserted into the limiting groove (19), and the second bevel gear (18) is meshed with the first bevel gear (17).
4. The apparatus supporting device for geological engineering exploration, according to claim 1, wherein: the bottom of carousel (10) set up ring channel (20), the top fixed mounting of dead lever (2) links piece (21), links the top fixed mounting sliding block of piece (21), the sliding block inserts to in ring channel (20).
5. The apparatus supporting device for geological engineering exploration, according to claim 4, wherein: the sections of the annular groove (20) and the sliding block are both dovetail-shaped.
6. The apparatus supporting device for geological engineering exploration, according to claim 1, wherein: the fixing mechanism comprises a placing groove (22) formed in the top surface of the placing plate (11), a sliding block is matched in the placing groove (22), the sliding block is connected with the placing groove (22) through a spring, a first blocking plate (23) is fixedly installed at the top end of the sliding block, and a second blocking plate (24) is fixedly installed on one side of the top end of the placing plate (11).
CN202211630276.9A 2022-12-19 2022-12-19 Equipment supporting device for geological engineering investigation Pending CN115681725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211630276.9A CN115681725A (en) 2022-12-19 2022-12-19 Equipment supporting device for geological engineering investigation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211630276.9A CN115681725A (en) 2022-12-19 2022-12-19 Equipment supporting device for geological engineering investigation

Publications (1)

Publication Number Publication Date
CN115681725A true CN115681725A (en) 2023-02-03

Family

ID=85056240

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211630276.9A Pending CN115681725A (en) 2022-12-19 2022-12-19 Equipment supporting device for geological engineering investigation

Country Status (1)

Country Link
CN (1) CN115681725A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277304A1 (en) * 1986-12-09 1988-08-10 Siemens Aktiengesellschaft Mounting apparatus for a measuring cryostat
JPH07270163A (en) * 1994-03-30 1995-10-20 Moriyama Giken:Kk Lift mechanism of surveying tripod
CN209654952U (en) * 2019-03-25 2019-11-19 云南智根测绘有限公司 A kind of engineering mapping supporting and mounting bracket
CN112594517A (en) * 2020-12-09 2021-04-02 谭玉松 Surveying and mapping instrument support frame applicable to different terrains for engineering surveying and mapping
CN213089195U (en) * 2020-06-08 2021-04-30 杭州富业标识工程有限公司 Good-stability signboard for garbage classification
CN215259025U (en) * 2021-06-15 2021-12-21 广西大汉岩土工程有限责任公司 Support for surveying and mapping

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277304A1 (en) * 1986-12-09 1988-08-10 Siemens Aktiengesellschaft Mounting apparatus for a measuring cryostat
JPH07270163A (en) * 1994-03-30 1995-10-20 Moriyama Giken:Kk Lift mechanism of surveying tripod
CN209654952U (en) * 2019-03-25 2019-11-19 云南智根测绘有限公司 A kind of engineering mapping supporting and mounting bracket
CN213089195U (en) * 2020-06-08 2021-04-30 杭州富业标识工程有限公司 Good-stability signboard for garbage classification
CN112594517A (en) * 2020-12-09 2021-04-02 谭玉松 Surveying and mapping instrument support frame applicable to different terrains for engineering surveying and mapping
CN215259025U (en) * 2021-06-15 2021-12-21 广西大汉岩土工程有限责任公司 Support for surveying and mapping

Similar Documents

Publication Publication Date Title
CN110439461B (en) Drilling rig for rock and soil investigation
CN108151784B (en) Supporting device of engineering measurement equipment
CN106624040B (en) A kind of one piece drilling equipment for solar energy mirror holder
CN115184068A (en) Oil development surveys device
CN215632747U (en) Novel geological planning is reconnaissance probing for design device
CN115681725A (en) Equipment supporting device for geological engineering investigation
CN212672857U (en) Total station
CN212080711U (en) Measuring device for farmland measurement planning
CN211532122U (en) Trees support fixing device for afforestation
CN108458687B (en) Foundation settlement measuring device
CN214467268U (en) Land space planning terrain measuring device
CN114459443A (en) Surveying instrument positioning device
CN208635797U (en) A kind of mapping total station of high stability
CN218324777U (en) Drilling straightening mechanism for engineering geological drilling
CN216280327U (en) High geotechnical engineering geology reconnaissance of stability is with survey and drawing auxiliary assembly
CN207905786U (en) A kind of novel measuring tune integrated instrument
CN219347572U (en) Measuring equipment for reconnaissance
CN219284288U (en) Measuring equipment for electric power design
CN217736839U (en) Installation adjusting device for foundation pit inner wall monitoring equipment
CN220522480U (en) Colliery geology measuring device convenient to adjust
CN220086361U (en) Support stable adjustable GNSS antenna support mounting structure
CN113188824B (en) Geotechnical engineering linear surveying method
CN211374735U (en) Iron detector with depth detection function
CN217875032U (en) Support frame convenient to accomodate
CN217327203U (en) Geological survey drilling equipment

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20230203