CN213745659U - Indoor formaldehyde short-term test analytical equipment - Google Patents
Indoor formaldehyde short-term test analytical equipment Download PDFInfo
- Publication number
- CN213745659U CN213745659U CN202022387728.8U CN202022387728U CN213745659U CN 213745659 U CN213745659 U CN 213745659U CN 202022387728 U CN202022387728 U CN 202022387728U CN 213745659 U CN213745659 U CN 213745659U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- plate
- cylinder
- bottom plate
- sliding
- 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.)
- Expired - Fee Related
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000012031 short term test Methods 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 27
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 244000309464 bull Species 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 201000004624 Dermatitis Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses an indoor formaldehyde rapid detection and analysis device, which comprises a bottom plate, wherein the front and back positions of the left and right sides of the top of the bottom plate are fixedly connected with a cylinder body, the outer surface of the cylinder body is provided with a sliding cylinder, the top of the cylinder body penetrates through the sliding cylinder and extends the inner cavity of the sliding cylinder to be fixedly connected with a fixed block, a rotating rod is arranged to drive a first bevel gear to rotate, the first bevel gear drives a screw rod to rotate through a second bevel gear, the screw rod drives a reinforcing column and the sliding cylinder to move upwards through a threaded sleeve, so that the sliding cylinder and the cylinder body generate relative displacement, the sliding cylinder drives a top plate to move upwards and simultaneously drives a detection device body to move, the height of the detection device body is adjusted, the structure is provided, the advantage of conveniently adjusting the height of the detection device is achieved, and the problem that the existing detection device does not adjust the height is solved, thereby having made things convenient for the staff to carry out formaldehyde detection to indoor.
Description
Technical Field
The utility model relates to an indoor detection technology field specifically is an indoor formaldehyde short-term test analytical equipment.
Background
The formaldehyde detection refers to that quantitative detection is carried out on formaldehyde contained in air, water, food, clothes, plates, leather and the like through a specific method or instrument, the formaldehyde is shaped by glyoxal resin, the formaldehyde contains formaldehyde components, the formaldehyde has strong stimulation to human skin and can cause skin eczema and systemic allergy, the formaldehyde is determined to be a carcinogen by world health organization, a large number of plates are usually used in indoor home decoration, the plates can be bonded by an adhesive in the production process, the content of the formaldehyde in the plates exceeds the standard, the formaldehyde can be volatilized in half a year or even longer after the completion of the home decoration project, and the formaldehyde measuring personnel are required to carry a formaldehyde detection device to measure the indoor formaldehyde within a certain time, general detection device has the inconvenient defect of adjusting detection device height to inconvenient staff detects indoor formaldehyde, for this reason we provide an indoor formaldehyde short-term test analytical equipment, solves above the problem that proposes.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an indoor formaldehyde short-term test analytical equipment has possessed the convenient advantage of highly adjusting detection device, has solved current detection device and has not possessed the problem of highly adjusting.
In order to achieve the above object, the utility model provides a following technical scheme: a cylinder is fixedly connected to the front and back of the left side and the right side of the top of a bottom plate, a sliding cylinder is arranged on the outer surface of the cylinder, the top of the cylinder penetrates through the sliding cylinder and extends to the inner cavity of the sliding cylinder to be fixedly connected with a fixed block, a top plate is fixedly connected to the top of the sliding cylinder, pillars are fixedly connected to the front and back of the left side and the right side of the top of the bottom plate and located on the inner side of the cylinder, a connecting plate is fixedly connected to the tops of the pillars, a reinforcing plate is fixedly connected to the bottom of the bottom plate, a vertical plate is fixedly connected to the right side of the bottom plate, a rotating rod is rotatably connected to the right side of the vertical plate through a bearing, the left side of the rotating rod penetrates through the vertical plate and extends to the left side of the vertical plate, a first helical gear is sleeved on the surface of the rotating rod, the surface of the first bevel gear is meshed with a second bevel gear, a screw rod is sleeved on the inner surface of the second bevel gear, the top of the screw rod penetrates through the bottom plate through a bearing and extends to the top of the bottom plate, the joint of the top of the screw rod and the bottom of the connecting plate is rotatably connected through the bearing, a threaded sleeve is in threaded connection with the surface of the screw rod, reinforcing columns are welded on the left side and the right side of the threaded sleeve, and one side, far away from the threaded sleeve, of each reinforcing column is fixedly connected with the joint of the sliding barrel.
Preferably, the left side and the right side of fixed block all fixedly connected with slider, the spout has all been seted up to the left and right sides of slide cartridge inner chamber, the surface of slider and the internal surface sliding connection of spout.
Preferably, the top of the top plate is provided with a clamping groove, and the inner surface of the clamping groove is provided with a detection device body.
Preferably, the reinforcing columns and the pillars are staggered with each other, and the distance between the outer surfaces of the reinforcing columns and the outer surfaces of the pillars is five centimeters.
Preferably, the right side fixedly connected with diaphragm of riser, the through-hole has been seted up at the top of diaphragm, the internal surface slip of through-hole is provided with the round pin pole, the top fixedly connected with stopper of round pin pole, the bottom of stopper and the outside fixedly connected with spring that is located the round pin pole, the bottom of spring and the top fixed connection of diaphragm, the bottom of round pin pole runs through the through-hole and extends to the bottom of through-hole.
Preferably, the right side fixedly connected with spacing dish of bull stick, the pinhole has all been seted up on the surface of spacing dish, the bottom of pin pole closely laminates with the internal surface in pinhole.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a set up the bull stick and drive first helical gear and rotate, first helical gear drives the screw rod through the second helical gear and rotates, the screw rod passes through the screw sleeve and drives the enhancement post and slide cartridge rebound, make slide cartridge and cylinder produce relative displacement, slide cartridge drives roof rebound, also drive the detection device body simultaneously and remove, highly adjust the detection device body, through setting up above structure, the advantage of conveniently adjusting the detection device height has been possessed, the problem of current detection device does not possess highly adjusting has been solved, thereby made things convenient for the staff to carry out formaldehyde to the room and detected.
2. The utility model is provided with the slide block and the slide groove, thereby facilitating the slide of the slide cylinder on the outer surface of the cylinder body and limiting the slide cylinder;
the clamping groove is arranged, so that the detection device body is convenient to place;
the reinforcing columns and the supporting columns are arranged in a mutually staggered mode, so that the reinforcing columns are prevented from rubbing the supporting columns in the rising process, and the device is prevented from being damaged;
the transverse plate, the through hole, the pin rod, the limiting block and the spring are matched for use, so that the pin rod is reset;
through setting up spacing dish and pinhole, made things convenient for spacing to spacing dish, avoided the phenomenon of rotation to appear in the bull stick.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1;
FIG. 3 is a top cross-sectional view of the screw and threaded sleeve arrangement of the present invention;
fig. 4 is a perspective view of the structure of the bottom plate and the connecting plate of the present invention.
In the figure: 1. a base plate; 2. a cylinder; 3. a slide cylinder; 4. a fixed block; 5. a top plate; 6. a pillar; 7. a connecting plate; 8. a reinforcing plate; 9. a vertical plate; 10. a rotating rod; 11. a first helical gear; 12. a second helical gear; 13. a screw; 14. a threaded sleeve; 15. a reinforcement column; 16. a slider; 17. a chute; 18. a card slot; 19. a detection device body; 20. a transverse plate; 21. a through hole; 22. a pin rod; 23. a limiting block; 24. a spring; 25. a limiting disc; 26. a pin hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1-4, a rapid indoor formaldehyde detection and analysis device comprises a bottom plate 1, columns 2 are fixedly connected to the front and back positions of the left and right sides of the top of the bottom plate 1, sliding cylinders 3 are arranged on the outer surfaces of the columns 2, fixing blocks 4 are fixedly connected to the tops of the columns 2, which penetrate through the sliding cylinders 3 and extend into the inner cavities of the sliding cylinders 3, top plates 5 are fixedly connected to the tops of the sliding cylinders 3, pillars 6 are fixedly connected to the front and back positions of the left and right sides of the top of the bottom plate 1 and are located on the inner sides of the columns 2, connecting plates 7 are fixedly connected to the tops of the pillars 6, reinforcing plates 8 are fixedly connected to the bottoms of the bottom plate 1, vertical plates 9 are fixedly connected to the right side of the bottom plate 1, rotating rods 10 are rotatably connected to the right sides of the vertical plates 9 through bearings, the left sides of the rotating rods 10 penetrate through the vertical plates 9 and extend to the left sides of the vertical plates 9, the left sides of the rotating rods 10 penetrate through the reinforcing plates 8 and extend to the left sides of the reinforcing plates 8 through bearings, the surface of the rotating rod 10 is sleeved with a first helical gear 11, the surface of the first helical gear 11 is meshed with a second helical gear 12, the inner surface of the second helical gear 12 is sleeved with a screw 13, the top of the screw 13 penetrates through the bottom plate 1 through a bearing and extends to the top of the bottom plate 1, the joint of the top of the screw 13 and the bottom of the connecting plate 7 is rotatably connected through a bearing, the surface of the screw 13 is in threaded connection with a threaded sleeve 14, reinforcing columns 15 are welded on the left side and the right side of the threaded sleeve 14, one side, far away from the threaded sleeve 14, of each reinforcing column 15 is fixedly connected with the joint of the sliding cylinder 3, the rotating rod 10 is arranged to drive the first helical gear 11 to rotate, the first helical gear 11 drives the screw 13 to rotate through the second helical gear 12, the screw 13 drives the reinforcing columns 15 and the sliding cylinder 3 to move upwards through the threaded sleeve 14, so that the sliding cylinder 3 and the cylinder 2 generate relative displacement, and the sliding cylinder 3 drives the top plate 5 to move upwards, also drive detection device body 19 simultaneously and remove, adjust the height of detection device body 19, through setting up above structure, possessed the convenient advantage of adjusting detection device height, solved current detection device and did not possess the problem of adjusting the height to make things convenient for the staff to carry out formaldehyde to indoor and detect.
Referring to fig. 1, the left and right sides of the fixed block 4 are both fixedly connected with the sliding blocks 16, the left and right sides of the inner cavity of the sliding barrel 3 are both provided with the sliding grooves 17, the outer surface of the sliding blocks 16 is slidably connected with the inner surface of the sliding grooves 17, the sliding barrel 3 can conveniently slide up and down on the outer surface of the cylinder 2 by arranging the sliding blocks 16 and the sliding grooves 17, and the sliding barrel 3 is limited.
Referring to fig. 1, a slot 18 is formed in the top of the top plate 5, a detection device body 19 is disposed on the inner surface of the slot 18, and the detection device body 19 is conveniently placed by disposing the slot 18.
Referring to fig. 3 and 4, the reinforcing columns 15 and the pillars 6 are staggered with each other, the distance between the outer surfaces of the reinforcing columns 15 and the outer surfaces of the pillars 6 is five centimeters, and the reinforcing columns 15 and the pillars 6 are staggered with each other, so that the device is prevented from being damaged due to friction between the reinforcing columns 15 and the pillars 6 in the lifting process.
Please refer to fig. 2, a transverse plate 20 is fixedly connected to the right side of the vertical plate 9, a through hole 21 is formed in the top of the transverse plate 20, a pin 22 is slidably disposed on the inner surface of the through hole 21, a limiting block 23 is fixedly connected to the top of the pin 22, a spring 24 is fixedly connected to the bottom of the limiting block 23 and located outside the pin 22, the bottom of the spring 24 is fixedly connected to the top of the transverse plate 20, the bottom of the pin 22 penetrates through the through hole 21 and extends to the bottom of the through hole 21, and the pin 22 is reset by the cooperation of the transverse plate 20, the through hole 21, the pin 22, the limiting block 23 and the spring 24.
Referring to fig. 2, a limiting disc 25 is fixedly connected to the right side of the rotating rod 10, pin holes 26 are formed in the surface of the limiting disc 25, the bottom of the pin 22 is tightly attached to the inner surface of the pin holes 26, and the limiting disc 25 and the pin holes 26 are arranged to facilitate limiting of the limiting disc 25 and avoid rotation of the rotating rod 10.
When the device is used, the detection device body 19 is firstly placed on the inner surface of the clamping groove 18, then the device is moved to the indoor, when a high position needs to be detected, the limiting block 23 drives the pin rod 22 and the spring 24 to be lifted upwards, then the limiting disc 25 rotates, the limiting disc 25 drives the rotating rod 10 to drive the first helical gear 11 to rotate, the first helical gear 11 drives the second helical gear 12 to rotate, the second helical gear 12 drives the screw 13 to rotate, the screw 13 drives the threaded sleeve 14 to rotate, the threaded sleeve 14 drives the sliding cylinder 3 to move upwards through the reinforcing column 15, so that the sliding cylinder 3 and the cylinder 2 generate relative displacement, the fixed block 4 drives the sliding block 16 to slide on the inner surface of the sliding groove 17, meanwhile, the sliding block 16 also limits the sliding cylinder 3, the design of the supporting column 6 and the connecting plate 7 improves the stability when the screw 13 rotates, and at the moment, the fixed block 4 drives the pin rod 22 to be ejected downwards on the inner surface of the through hole 21 through the spring 24, make pin rod 22 run through-hole 21 and peg graft with the internal surface of pinhole 26, carry on spacingly to spacing dish 25, through setting up above structure, possessed the convenient advantage of highly adjusting detection device, solved current detection device and did not possess the problem of highly adjusting to make things convenient for the staff to carry out formaldehyde to indoor and detect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an indoor formaldehyde short-term test analytical equipment, includes bottom plate (1), its characterized in that: the cylinder (2) is fixedly connected to the front and back positions of the left side and the right side of the top of the bottom plate (1), the sliding cylinder (3) is arranged on the outer surface of the cylinder (2), the top of the cylinder (2) penetrates through the sliding cylinder (3) and extends to the inner cavity of the sliding cylinder (3) to be fixedly connected with the fixing block (4), the top of the sliding cylinder (3) is fixedly connected with the top plate (5), the pillars (6) are fixedly connected to the front and back positions of the left side and the right side of the top of the bottom plate (1) and positioned on the inner sides of the cylinder (2), the connecting plate (7) is fixedly connected to the tops of the pillars (6), the reinforcing plate (8) is fixedly connected to the bottom of the bottom plate (1), the vertical plate (9) is fixedly connected to the right side of the bottom plate (1), the right side of the vertical plate (9) is rotatably connected with the rotating rod (10) through a bearing, the left side of the rotating rod (10) penetrates through the vertical plate (9) and extends to the left side of the vertical plate (9), the left side of the rotating rod (10) penetrates through the reinforcing plate (8) through a bearing and extends to the left side of the reinforcing plate (8), a first helical gear (11) is sleeved on the surface of the rotating rod (10), a second helical gear (12) is meshed on the surface of the first helical gear (11), a screw (13) is sleeved on the inner surface of the second helical gear (12), the top of the screw (13) penetrates through the bottom plate (1) through the bearing and extends to the top of the bottom plate (1), the top of the screw (13) is rotatably connected with the connecting part of the bottom of the connecting plate (7) through the bearing, a threaded sleeve (14) is connected to the surface of the screw (13) in a threaded mode, reinforcing columns (15) are welded to the left side and the right side of the threaded sleeve (14), and one side, far away from the threaded sleeve (14), of each reinforcing column (15) is fixedly connected with the connecting part of the sliding barrel (3).
2. The indoor formaldehyde rapid detection and analysis device according to claim 1, characterized in that: the equal fixedly connected with slider (16) in the left and right sides of fixed block (4), spout (17) have all been seted up to the left and right sides of slide cartridge (3) inner chamber, the surface of slider (16) and the internal surface sliding connection of spout (17).
3. The indoor formaldehyde rapid detection and analysis device according to claim 1, characterized in that: a clamping groove (18) is formed in the top of the top plate (5), and a detection device body (19) is arranged on the inner surface of the clamping groove (18).
4. The indoor formaldehyde rapid detection and analysis device according to claim 1, characterized in that: the reinforcing columns (15) and the support columns (6) are mutually staggered, and the distance between the outer surfaces of the reinforcing columns (15) and the outer surfaces of the support columns (6) is five centimeters.
5. The indoor formaldehyde rapid detection and analysis device according to claim 1, characterized in that: the right side fixedly connected with diaphragm (20) of riser (9), through-hole (21) have been seted up at the top of diaphragm (20), the internal surface slip of through-hole (21) is provided with round pin pole (22), the top fixedly connected with stopper (23) of round pin pole (22), the outside fixedly connected with spring (24) that the bottom of stopper (23) just is located round pin pole (22), the bottom of spring (24) and the top fixed connection of diaphragm (20), the bottom of round pin pole (22) runs through-hole (21) and extends to the bottom of through-hole (21).
6. The indoor formaldehyde rapid detection and analysis device according to claim 5, characterized in that: the right side fixedly connected with spacing dish (25) of bull stick (10), pinhole (26) have all been seted up on the surface of spacing dish (25), the bottom of pin pole (22) closely laminates with the internal surface of pinhole (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022387728.8U CN213745659U (en) | 2020-10-23 | 2020-10-23 | Indoor formaldehyde short-term test analytical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022387728.8U CN213745659U (en) | 2020-10-23 | 2020-10-23 | Indoor formaldehyde short-term test analytical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213745659U true CN213745659U (en) | 2021-07-20 |
Family
ID=76852533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022387728.8U Expired - Fee Related CN213745659U (en) | 2020-10-23 | 2020-10-23 | Indoor formaldehyde short-term test analytical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213745659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324475A (en) * | 2021-12-24 | 2022-04-12 | 常州市安平安全技术服务有限公司 | Factory safety assessment system |
-
2020
- 2020-10-23 CN CN202022387728.8U patent/CN213745659U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324475A (en) * | 2021-12-24 | 2022-04-12 | 常州市安平安全技术服务有限公司 | Factory safety assessment system |
| CN114324475B (en) * | 2021-12-24 | 2023-12-01 | 常州市安平安全技术服务有限公司 | Factory safety assessment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213745659U (en) | Indoor formaldehyde short-term test analytical equipment | |
| CN213192598U (en) | Solid phase extraction pressure device | |
| CN212807913U (en) | Drop hammer impact testing machine for building material detection | |
| CN210400435U (en) | Device based on door plant spraying surface degree of consistency detects | |
| CN206321537U (en) | Mortar coagulation time tester | |
| CN212914419U (en) | Portable lift dance barre | |
| CN108375512A (en) | A kind of tempered glass apparatus for impact testing | |
| CN107560588B (en) | Turbine welding cavity surface flatness detects frock | |
| CN209932172U (en) | Show shelf is used in art design exhibition | |
| CN113532244A (en) | Automobile clutch pressure plate detection equipment | |
| CN219122281U (en) | A support is put to thing that awaits measuring for SAR test | |
| CN206113899U (en) | Novel soil distance measurement car | |
| CN214665783U (en) | Organic tea processing is with dehydration drying device | |
| CN217572387U (en) | Furniture surface polishing device | |
| CN216050378U (en) | Pressure metering device for mechanics experiments | |
| CN216926464U (en) | Concrete slump testing arrangement for construction | |
| CN220845286U (en) | Material lifting equipment for building civil engineering | |
| CN219434819U (en) | Temperature and salt depth instrument convenient to recover | |
| CN221124600U (en) | Amino acid preparation is with check out test set | |
| CN220062877U (en) | Aperture detection device of automobile injection molding | |
| CN214792931U (en) | Angle detector for supervision | |
| CN219563468U (en) | Wood strip cutting processing equipment for toy production | |
| CN219266059U (en) | Leather color fastness tester | |
| CN220794088U (en) | Portable floor thickness detector | |
| CN219589653U (en) | Bottle embryo wall thickness detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210720 |