CN113441476A - Engineering construction is with multi-functional dust collector - Google Patents
Engineering construction is with multi-functional dust collector Download PDFInfo
- Publication number
- CN113441476A CN113441476A CN202110187174.3A CN202110187174A CN113441476A CN 113441476 A CN113441476 A CN 113441476A CN 202110187174 A CN202110187174 A CN 202110187174A CN 113441476 A CN113441476 A CN 113441476A
- Authority
- CN
- China
- Prior art keywords
- dust
- support frame
- dust collection
- head
- communicated
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 138
- 238000010276 construction Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000007921 spray Substances 0.000 claims abstract description 20
- 238000007667 floating Methods 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 1
- 239000008187 granular material Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/04—Cleaning by suction, with or without auxiliary action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
- B01D47/08—Spray cleaning with rotary nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a multifunctional dust removal device for engineering construction, which comprises a support frame, wherein a dust storage box is fixedly arranged on the left side of the top of an inner cavity of the support frame, the left side of the dust storage box is communicated with a dust collection pump, a dust inlet pipe of the dust collection pump extends to the upper part of the support frame and is communicated with a connecting pipe, a fastening plate is sleeved on the surface of the connecting pipe, the right end of the connecting pipe is communicated with a dust collection head, a support block is fixedly arranged on the top of the support frame, and a rotating shaft is rotatably arranged on the top of the support block in an embedded mode. The dust collection head and the spray head are set to be rotary, the rotary handle can be used for driving the dust collection head and the spray head to rotate, the dust collection efficiency of a construction site can be further improved, the spray head can spray water synchronously to humidify floating dust and prevent the dust from floating everywhere, the dust collection head can absorb and remove the dust at different angles and positions in an all-round way, and the dust collection head is simple to operate and high in dust collection efficiency.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to a multifunctional dust removal device for engineering construction.
Background
The dust removing device is commonly called as a dust remover and is a device for removing or reducing the content of fly ash in smoke, the types of the dust removing device can be divided into a biological nano-film dust suppression device, a cloud and mist dust suppression device, a cloth bag dust removing device, a cyclone dust removing device, a wet dust removing device, an electrostatic dust removing device and a desulfurization dust removing device, and the dust removing device is applied to the industries of chemical industry, petroleum industry, metallurgy industry, building industry, mine industry, machinery industry, light textile industry and the like, the dust removing device applied to engineering buildings generally humidifies dust and soil raised during construction, thereby leading the dust containing moisture to fall on the ground, avoiding the dust flying to pollute the environment, the existing engineering building dust removal device can play a dust removal effect, but the dust removal direction is fixed, so that large-scale rapid dust removal cannot be carried out, dust still floats in the air, and the environment of a construction site is seriously influenced.
Disclosure of Invention
The invention aims to provide a multifunctional dust removal device for engineering construction, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a multifunctional dust removal device for engineering construction comprises a support frame, wherein a dust storage box is fixedly mounted on the left side of the top of an inner cavity of the support frame, a dust suction pump is communicated with the left side of the dust storage box, a dust inlet pipe of the dust suction pump extends to the upper side of the support frame and is communicated with a connecting pipe, a fastening plate is sleeved on the surface of the connecting pipe, a dust suction head is communicated with the right end of the connecting pipe, a supporting block is fixedly mounted on the top of the support frame, a rotating shaft is rotatably mounted on the top of the supporting block in an embedded mode, the top of the rotating shaft is fixedly mounted with the bottom of the fastening plate through a connecting block, a water storage tank is placed on the right side of the inner cavity of the support frame, a water pump is communicated with the right side of the water storage tank, a water outlet pipe of the water pump extends to the top of the support frame and is communicated with a supporting pipe, a sleeve plate is fixedly mounted on the right side of the supporting pipe, and the sleeve plate is clamped on the surface of the dust suction head, the right side of the sleeve plate is fixedly provided with a spray head, and the supporting tube is communicated with the spray head.
Preferably, the right side fixed mounting at support frame top has the support column, the top of support column is rotated and is installed the cardan shaft, the top of cardan shaft rotates with the bottom of stay tube and installs.
Preferably, the left side of the support frame is fixedly provided with a push handle through a fastening bolt, and one end of the push handle far away from the support frame is sleeved with an anti-slip sleeve.
Preferably, the top of mounting plate has seted up the draw-in groove, the inside of draw-in groove has the rotation handle through the fixture block joint.
Preferably, the surface of dust inlet pipe one end of dust absorption pump is telescopic design, the bottom of support frame inner chamber is rotated and is installed the baffle, the left side of baffle is laminated with the right side of storage water tank mutually, the right side of baffle is rotated and is installed the regulation pole, and adjusts the lower extreme of pole and the inner wall joint of support frame.
Preferably, the use method of the multifunctional dust removal device for engineering construction comprises the following steps:
A. the supporting frame is pushed to a designated position by the pushing handle through the universal wheel, and then the dust collection pump is started through the external controller to drive the dust collection head to work;
B. an operator can hold the rotating handle to drive the connecting pipe and the rotating shaft to rotate by utilizing the fastening plate and remove dust by swinging the dust collection head left and right;
C. and the surface at the dust absorption head increases the shower nozzle, can start the water pump and carry the water of storage water tank inside to the shower nozzle blowout can carry out the atomizing humidification to the dust granule, and it is showy to reduce the dust, improves the dust collection efficiency of job site.
Compared with the prior art, the invention has the following beneficial effects:
1. the dust collection head and the spray head are set to be rotary, the rotary handle can be used for driving the dust collection head and the spray head to rotate, the dust collection efficiency of a construction site can be further improved, the spray head can spray water synchronously to humidify floating dust and prevent the dust from floating everywhere, the dust collection head can absorb and remove the dust at different angles and positions in an all-round way, and the dust collection head is simple to operate and high in dust collection efficiency.
2. According to the invention, the universal shaft is additionally arranged between the bottom of the supporting tube and the supporting column, so that the sleeve plate can conveniently move back and forth along with the dust collection head, the rotating track of the spray head cannot be obstructed, the rotating handle and the fastening plate are installed in a clamping manner, the fastening plate can be conveniently connected, and the quick replacement is easy after the fastening plate is damaged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of the fastener plate structure of the present invention;
FIG. 3 is a partial sectional view of the support tube of the present invention.
In the figure: 1. a support frame; 2. a dust storage box; 3. a dust suction pump; 4. a connecting pipe; 5. a fastening plate; 6. a dust collection head; 7. a support block; 8. a rotating shaft; 9. a water storage tank; 10. a water pump; 11. supporting a tube; 12. sheathing; 13. a spray head; 14. a support pillar; 15. a push handle; 16. a cardan shaft; 17. a card slot; 18. rotating the handle; 19. and a baffle plate.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In the description herein, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings to facilitate the description of the patent and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting of the patent. In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can, for example, be fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-3, a multifunctional dust removing device for engineering construction comprises a supporting frame 1, a supporting column 14 is fixedly installed on the right side of the top of the supporting frame 1, a universal shaft 16 is rotatably installed on the top of the supporting column 14, the top of the universal shaft 16 and the bottom of a supporting tube 11 are rotatably installed, a push handle 15 is fixedly installed on the left side of the supporting frame 1 through a fastening bolt, an anti-slip sleeve is sleeved on one end, away from the supporting frame 1, of the push handle 15, a dust storage box 2 is fixedly installed on the left side of the top of an inner cavity of the supporting frame 1, a dust suction pump 3 is communicated with the left side of the dust storage box 2, the surface of one end of a dust inlet tube of the dust suction pump 3 is in a telescopic design, a baffle plate 19 is rotatably installed on the bottom of the inner cavity of the supporting frame 1, the left side of the baffle plate 19 is attached to the right side of a water storage tank 9, an adjusting rod is rotatably installed on the right side of the baffle plate 19, the lower end of the adjusting rod is clamped with the inner wall of the supporting frame 1, a dust inlet tube of the dust suction pump 3 extends to the upper portion of the supporting frame 1 and is communicated with a connecting tube 4, the surface of the connecting pipe 4 is sleeved with the fastening plate 5, the top of the fastening plate 5 is provided with a clamping groove 17, the inside of the clamping groove 17 is clamped with a rotating handle 18 through a clamping block, the right end of the connecting pipe 4 is communicated with a dust collection head 6, the top of the support frame 1 is fixedly provided with a support block 7, the top of the support block 7 is embedded with a rotating shaft 8, the top of the rotating shaft 8 is fixedly arranged with the bottom of the fastening plate 5 through a connecting block, a water storage tank 9 is arranged on the right side of the inner cavity of the support frame 1, the right side of the water storage tank 9 is communicated with a water pump 10, a water outlet pipe of the water pump 10 penetrates through the top of the support frame 1 and is communicated with a support pipe 11, by adding a universal shaft 16 between the bottom of the support pipe 11 and the support pipe 14, the sleeve plate 12 can conveniently move back and forth along with the dust collection head 6, the rotating track of the spray head 13 cannot be blocked, and the rotating handle 18 and the fastening plate 5 are installed in a clamping manner, be convenient for connect the operation to mounting plate 5, and easily quick replacement after the damage appears, the right side fixed mounting of stay tube 11 has lagging 12, the lagging 12 joint is on the surface of dust absorption head 6, the right side fixed mounting of lagging 12 has shower nozzle 13, stay tube 11 and shower nozzle 13 intercommunication, through setting dust absorption head 6 and shower nozzle 13 into the rotary type, usable rotation handle 18 drives dust absorption head 6 and shower nozzle 13 and rotates and can further improvement to job site's dust collection efficiency, and shower nozzle 13 sprays water in step and can humidify floated dust, prevent that the dust from scattering everywhere, this dust absorption head 6 can carry out all-round absorption to the dust of different angles and position, and easy operation, the dust collection efficiency is high.
A use method of a multifunctional dust removal device for engineering construction comprises the following steps:
A. the supporting frame 1 is pushed to a designated position by the pushing handle 15 through the universal wheel, and then the dust collection pump 3 is started through the external controller to drive the dust collection head 6 to work;
B. an operator can hold the rotating handle 18 and can drive the connecting pipe 4 and the rotating shaft 8 to rotate by utilizing the fastening plate 5 and can perform dust removal on the left and right swinging of the dust collection head 6, and the supporting pipe 11 and the supporting column 14 on the side surface of the dust collection head 6 are connected by utilizing the universal shaft 16 and can synchronously rotate along with the dust collection head 6;
C. and the surface of the dust collection head 6 is additionally provided with the spray head 13, the water pump 10 can be started to convey water in the water storage tank 9 to the spray head 13 to spray out, so that dust particles can be atomized and humidified, dust floating is reduced, and the dust removal efficiency of a construction site is improved.
During the use, utilize the universal wheel to promote assigned position with support frame 1 through pushing away 15, then start dust absorption pump 3 through peripheral hardware controller and drive dust absorption head 6 work, operating personnel holds and rotates the usable mounting plate 5 of 18 available mounting plates of handle and drive connecting pipe 4 and pivot 8 and rotate and remove dust to dust absorption head 6 horizontal hunting, because the stay tube 11 and the support column 14 of dust absorption head 6 side utilize the universal shaft 16 to be connected, can follow dust absorption head 6 in step and rotate, and increase shower nozzle 13 on the surface of dust absorption head 6, can start water pump 10 and carry the inside water of storage water tank 9 to shower nozzle 13 blowout and can atomize the humidification to the dust granule, it floats to reduce the dust, improve the dust collection efficiency of job site.
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 a multi-functional dust collector is used in engineering construction, includes support frame (1), its characterized in that: the dust storage box (2) is fixedly mounted on the left side of the top of the inner cavity of the support frame (1), the dust storage box (2) is communicated with a dust suction pump (3) on the left side, a dust inlet pipe of the dust suction pump (3) extends to the support frame (1) and is communicated with a connecting pipe (4), a fastening plate (5) is sleeved on the surface of the connecting pipe (4), a dust suction head (6) is communicated with the right end of the connecting pipe (4), a supporting block (7) is fixedly mounted on the top of the support frame (1), a rotating shaft (8) is rotatably mounted on the top of the supporting block (7) in an embedded mode, the top of the rotating shaft (8) is fixedly mounted with the bottom of the fastening plate (5) through a connecting block, a water storage tank (9) is placed on the right side of the inner cavity of the support frame (1), a water pump (10) is communicated with the right side of the water storage tank (9), a water outlet pipe of the water pump (10) extends to the top of the support frame (1) and is communicated with a support pipe (11), the right side fixed mounting of stay tube (11) has lagging (12), lagging (12) joint is on the surface of dust absorption head (6), the right side fixed mounting of lagging (12) has shower nozzle (13), stay tube (11) and shower nozzle (13) intercommunication.
2. The multifunctional dust removing device for engineering construction according to claim 1, wherein: the right side fixed mounting at support frame (1) top has support column (14), the top of support column (14) is rotated and is installed cardan shaft (16), the top of cardan shaft (16) and the bottom of stay tube (11) are rotated the installation.
3. The multifunctional dust removing device for engineering construction according to claim 1, wherein: the left side of support frame (1) is through fastening bolt fixed mounting push away handle (15), push away the one end that support frame (1) was kept away from to handle (15) and cup jointed the antiskid cover.
4. The multifunctional dust removing device for engineering construction according to claim 1, wherein: a clamping groove (17) is formed in the top of the fastening plate (5), and a rotating handle (18) is clamped in the clamping groove (17) through a clamping block.
5. The multifunctional dust removing device for engineering construction according to claim 1, wherein: the surface of dust inlet pipe one end of dust absorption pump (3) is telescopic design, the bottom of support frame (1) inner chamber is rotated and is installed baffle (19), the left side of baffle (19) is laminated with the right side of storage water tank (9) mutually, the right side of baffle (19) is rotated and is installed the regulation pole, and adjusts the lower extreme of pole and the inner wall joint of support frame (1).
6. The application method of the multifunctional dust removal device for engineering construction is characterized in that: the using method comprises the following steps:
A. the supporting frame (1) is pushed to a designated position by the pushing handle (15) through the universal wheel, and then the dust collection pump (3) is started through the external controller to drive the dust collection head (6) to work;
B. an operator holds the rotating handle (18) and can drive the connecting pipe (4) and the rotating shaft (8) to rotate by using the fastening plate (5) and remove dust by swinging the dust collection head (6) left and right, and the dust collection head (6) can synchronously rotate along with the dust collection head (6) because the supporting pipe (11) on the side surface of the dust collection head (6) is connected with the supporting column (14) by using the universal shaft (16);
C. and the surface of the dust collection head (6) is additionally provided with the spray head (13), the water pump (10) can be started to convey water in the water storage tank (9) to the spray head (13) to spray out, so that dust particles can be atomized and humidified, dust floating is reduced, and the dust collection efficiency of a construction site is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110187174.3A CN113441476A (en) | 2021-02-18 | 2021-02-18 | Engineering construction is with multi-functional dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110187174.3A CN113441476A (en) | 2021-02-18 | 2021-02-18 | Engineering construction is with multi-functional dust collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113441476A true CN113441476A (en) | 2021-09-28 |
Family
ID=77808802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110187174.3A Pending CN113441476A (en) | 2021-02-18 | 2021-02-18 | Engineering construction is with multi-functional dust collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113441476A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239090A (en) * | 2005-03-02 | 2006-09-14 | Kao Corp | Suction nozzle for wet vacuum cleaner |
| CN108889725A (en) * | 2018-09-07 | 2018-11-27 | 曾金玉 | A kind of environmental project cleaning device |
| CN208213759U (en) * | 2018-03-15 | 2018-12-11 | 江苏微上新材料科技有限公司 | A kind of silicon rubber glass fibre sleeve production braider cleaning device |
| CN110586600A (en) * | 2019-09-30 | 2019-12-20 | 武汉道达机器人科技有限公司 | Dust absorption pipe assembly |
| CN111420504A (en) * | 2020-04-29 | 2020-07-17 | 福州市长乐区西斯图科技有限公司 | Dust removal and reduction device for processing workshop |
| CN212119349U (en) * | 2020-03-13 | 2020-12-11 | 云和县瑞灵玩具有限公司 | Dust device for construction |
-
2021
- 2021-02-18 CN CN202110187174.3A patent/CN113441476A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006239090A (en) * | 2005-03-02 | 2006-09-14 | Kao Corp | Suction nozzle for wet vacuum cleaner |
| CN208213759U (en) * | 2018-03-15 | 2018-12-11 | 江苏微上新材料科技有限公司 | A kind of silicon rubber glass fibre sleeve production braider cleaning device |
| CN108889725A (en) * | 2018-09-07 | 2018-11-27 | 曾金玉 | A kind of environmental project cleaning device |
| CN110586600A (en) * | 2019-09-30 | 2019-12-20 | 武汉道达机器人科技有限公司 | Dust absorption pipe assembly |
| CN212119349U (en) * | 2020-03-13 | 2020-12-11 | 云和县瑞灵玩具有限公司 | Dust device for construction |
| CN111420504A (en) * | 2020-04-29 | 2020-07-17 | 福州市长乐区西斯图科技有限公司 | Dust removal and reduction device for processing workshop |
Non-Patent Citations (1)
| Title |
|---|
| 宗光华，宗建华: "《现代家用机电器具知识》", 30 November 1990 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210544043U (en) | Dust fall equipment is used at construction scene | |
| CN208852598U (en) | A kind of construction dust-extraction unit | |
| CN207228029U (en) | A kind of efficient device for reducing dust of building engineering construction | |
| CN214552289U (en) | Dust device that municipal building engineering result of use is good | |
| CN211598738U (en) | Movable dust removal equipment for coal mining | |
| CN210151643U (en) | Civil engineering is with on-spot dust collector | |
| CN113441476A (en) | Engineering construction is with multi-functional dust collector | |
| CN210564628U (en) | Mine ventilation dust fall automated control device | |
| CN216457769U (en) | Building construction site dust device | |
| CN208493639U (en) | A kind of construction sunstroke prevention dedusting spray equipment | |
| CN219025231U (en) | Instrument dust shaker | |
| CN213314039U (en) | Multistage fountain dust suppression water saving fixtures that green building construction used | |
| CN220633572U (en) | Dust removing device | |
| CN218890342U (en) | Humidifier of dust remover | |
| CN209317957U (en) | A kind of deluge camion for site construction | |
| CN213175700U (en) | Tunnel construction is with tunnel top watering device | |
| CN213492706U (en) | Green's dust device for construction | |
| CN220558786U (en) | Dust suppressor for building construction | |
| CN215138176U (en) | Green energy-saving atomization spraying dust removing device for building construction | |
| CN212091467U (en) | Building construction site dust collector | |
| CN211200242U (en) | Dust keeper is used to construction fitment | |
| CN216259775U (en) | Dust device for constructional engineering construction | |
| CN115501720A (en) | Dust device for coal exploitation | |
| CN219502316U (en) | Dust collector in calcium carbonate workshop | |
| CN219441128U (en) | Dust collecting equipment for building engineering |
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 |
Application publication date: 20210928 |
|
| RJ01 | Rejection of invention patent application after publication |