CN109852767A - Thermal treatment cooling equipment - Google Patents
Thermal treatment cooling equipment Download PDFInfo
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- CN109852767A CN109852767A CN201910028508.5A CN201910028508A CN109852767A CN 109852767 A CN109852767 A CN 109852767A CN 201910028508 A CN201910028508 A CN 201910028508A CN 109852767 A CN109852767 A CN 109852767A
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Abstract
The invention belongs to technical field of metal heat treatment, more particularly to a kind of thermal treatment cooling equipment, including air cooling mechanism and for transporting the roller-way mechanism to air-cooled steel, air cooling mechanism includes cooling blower, upcast ventilation pipe and lower air conduit, upcast ventilation pipe and lower air conduit are all connected to the air outlet of cooling blower, and upcast ventilation pipe and lower air conduit both correspond to roller-way mechanism and be arranged and be located above and below roller-way mechanism to carry out strong convection cooling to the steel being set in roller-way mechanism.Since the tow sides of steel to be cooled can be cooled the jet-action of wind, the global consistency of steel to be cooled temperature change during cooling is also ensured in this way.And then also ensure the consistency of tissue and performance of the steel to be cooled after completing cooling down.Thermal treatment cooling equipment of the invention in this way will pass through the cross-ventilation heat transfer of high speed, has been obviously improved the heat transfer coefficient of steel to be cooled, has been obviously improved the cooling efficiency of steel to be cooled, shorten cooling required time.
Description
Technical field
The invention belongs to technical field of metal heat treatment more particularly to a kind of thermal treatment cooling equipments.
Background technique
During metal heat treatmet, some steel grades need the air after heating period to be cooled to room temperature.In Re Chu
It manages on production line, the air that steel are carried out usually on cold bed is cooling, and on cold bed, steel can pass through free convection and heat radiation
Cooling is realized in heat dissipation.
However, when the temperature of steel is down to 400 DEG C of low-temperature spaces below, by free convection and heat-radiation heat-dissipating come pair
When steel are cooled down, the rate of temperature fall of steel can become extremely slowly, and then the cooling efficiency that will lead to steel becomes more
Lowly.
Summary of the invention
The purpose of the present invention is to provide a kind of thermal treatment cooling equipments, it is intended to solve steel in the prior art and be in
When 400 DEG C of low-temperature spaces, the technical issues of steel are cooled down by free convection and heat-radiation heat-dissipating, inefficiency.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of thermal treatment cooling equipment, including air cooling mechanism
With for transporting the roller-way mechanism to air-cooled steel, the air cooling mechanism includes cooling blower, upcast ventilation pipe and lower air conduit, it is described on
Air hose and the lower air conduit are all connected to the air outlet of the cooling blower, and the upcast ventilation pipe and the lower air conduit both correspond to institute
Roller-way mechanism is stated to be arranged and be located above and below the roller-way mechanism to the steel being set in the roller-way mechanism
It is cooling that material carries out strong convection.
Further, the cooling equipment further includes monitoring mould group and control mould group, and the monitoring mould group corresponds to the roller
The outlet setting of road mechanism to monitor the temperature to air-cooled steel, the monitoring mould group and the roller-way mechanism with the control
The connection of mould group, the control mould group are returned according to preset steel dimension information, cooling parameter information and the monitoring mould group
The temperature information to air-cooled steel control the change of transmission rate of the roller-way mechanism and/or the periodicity of transmission direction changes
Become.
Further, if the monitoring mould group includes dry temperature sensor, each temperature sensor corresponds to the roller
The outlet of road mechanism is arranged, and each temperature sensor is electrically connected with the control mould group.
Further, the upcast ventilation pipe has the top positioned at the roller-way mechanism and along the transmission side of the roller-way mechanism
The air outlet in the two rows of laying is respectively connected with jet pipe, each upper equal face institute of jet pipe between two rows of upper air outlets
State the setting of roller-way mechanism.
Further, the lower air conduit has the lower section positioned at the roller-way mechanism and along the transmission side of the roller-way mechanism
Air outlet under to the two rows of laying is connected with several lower jet pipes, each lower equal face of jet pipe between two rows of lower air outlets
The roller-way mechanism setting.
Further, it is mounted on pressure-detecting device and control valve on each upcast ventilation pipe and each lower air conduit, respectively
The control valve and each pressure-detecting device are electrically connected with the control mould group.
Further, the roller-way mechanism includes driving motor, frequency converter and several rollers for transporting to air-cooled steel
Road, the driving motor are electrically connected with the frequency converter, and the frequency converter is electrically connected with the control mould group, each roller-way edge
The roller-way mechanism transports direction arrangement and is sequentially connected with the driving motor, and each upper jet pipe is respectively positioned on each described
The top of roller-way, each lower jet pipe are respectively positioned on the lower section of each roller-way.
Further, gap is each formed between each roller-way, each gap is corresponding at least one lower jet pipe.
Further, each upper jet pipe is mounted on several top nozzles, and each top nozzle is towards each roller-way
Setting, each lower jet pipe are mounted on several lower nozzles, and each lower nozzle extends into corresponding each gap.
Further, the cooling blower includes the main air hose of main body with the air outlet for being installed on the main body, institute
It states upcast ventilation pipe and the lower air conduit is all connected to the main air hose.
Beneficial effects of the present invention: thermal treatment cooling equipment of the invention, when work, cooling wind is exported from cooling blower,
And the two sides up and down of roller-way mechanism are ejected to via upcast ventilation pipe and lower air conduit, it is arranged such in the steel to be cooled in roller-way mechanism
Just fast cooling can be realized by the cooling wind action of lasting high speed convection, since the tow sides of steel to be cooled are equal
It can be cooled the jet-action of wind, also ensure the entirety of steel to be cooled temperature change during cooling in this way
Consistency.And then also ensure the consistency of tissue and performance of the steel to be cooled after completing cooling down.It is of the invention in this way
Thermal treatment cooling equipment will pass through high speed cross-ventilation heat transfer, be obviously improved the heat transfer coefficient of steel to be cooled, significantly
The cooling efficiency of steel to be cooled is improved, cooling required time is shortened.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the structural schematic diagram of cooling equipment provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the roller-way of cooling equipment provided in an embodiment of the present invention, upper jet pipe and lower jet pipe.
Wherein, each appended drawing reference in figure:
10-air cooling mechanism 11-cooling blower, 12-upcast ventilation pipes
13-20-roller-way of lower air conduit mechanism, 21-roller-ways
22-111-main bodies of gap 112-main air hose
121-go up the upper 123-top nozzle of jet pipe of air outlet 122-
131-lower air outlets 132-lower jet pipe 133-lower nozzle.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment that Fig. 1~2 is described is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
As shown in Fig. 1~2, thermal treatment cooling equipment provided in an embodiment of the present invention includes air cooling mechanism 10 and is used for
Transport the roller-way mechanism 20 to air-cooled steel.Wherein, air cooling mechanism 10 includes cooling blower 11, upcast ventilation pipe 12 and lower air conduit
13。
Further, cooling blower 11 can be centrifugal blower, and the air inlet of centrifugal blower can be according to weather and arrangement
Condition setting is equipped with filter device in outside workshop or in workshop thereon, to prevent foreign matter to be sucked into blower.And upcast ventilation pipe
12 and lower air conduit 13 be then all connected at the air outlet of cooling blower 11, and upcast ventilation pipe 12 and lower air conduit 13 both correspond to roller machine
Structure 20 is arranged and is located above and below roller-way mechanism 20.Specifically, the outlet air punishment of upcast ventilation pipe 12 and lower air conduit 13
It is not covered in the upper and lower part of roller-way mechanism 20, is also able to guarantee that the steel entered in roller-way mechanism 20 can be realized in this way
The all standing of cooling wind.To which upcast ventilation pipe 12 and lower air conduit 13 can be strong right to the steel progress being set in roller-way mechanism 20
Stream cooling.
Thermal treatment cooling equipment provided in an embodiment of the present invention is described further below, it is provided in an embodiment of the present invention
Thermal treatment cooling equipment, when work, cooling wind is exported from cooling blower 11, and is ejected to roller via upcast ventilation pipe 12 and lower air conduit 13
The two sides up and down of road mechanism 20, such setting just can be by lasting high speed convection in the steel to be cooled in roller-way mechanism 20
It cools down wind action and realizes fast cooling, since the injection that the tow sides of steel to be cooled can be cooled wind is made
With also ensuring the global consistency of steel to be cooled temperature change during cooling in this way.And then also ensure to
The consistency of tissue and performance of the cooling steel after completing cooling down.Thermal treatment cooling equipment of the invention in this way will pass through
The cross-ventilation of high speed conducts heat, and has been obviously improved the heat transfer coefficient of steel to be cooled, has been obviously improved the cooling of steel to be cooled
Efficiency shortens cooling required time.
In one embodiment of the invention, cooling equipment further includes that monitoring mould group (not shown) and control mould group (are schemed not
Show).Wherein, mould group concretely PLC programmable controller is controlled.The outlet that monitoring mould group corresponds to roller-way mechanism 20 is arranged to supervise
Temperature to air-cooled steel is surveyed, mould group and roller-way mechanism 20 is monitored and is connect with control mould group, wherein the mode of connection includes
Electrical connection such as connects at the communication connections mode with optical fiber.Control mould group according to preset steel dimension information, cooling parameter information with
And change and/or the transmission side of the transmission rate of the temperature information control roller-way mechanism 20 to air-cooled steel of monitoring mould group passback
To periodically-varied.Specifically, temperature when can monitor that steel enter roller-way mechanism 20 due to monitoring mould group, is controlled in this way
Molding group can determine the cooling required time of steel according to the tapping temperature of steel, and then control the transmission of roller-way mechanism 20
Rate.
Further, the parameter values such as plate thickness, the plate length of steel to be cooled can be also pre-entered in control mould group, and then are controlled
Molding group can more accurately determine out roller-way mechanism 20 according to parameter values such as the plate thickness of cooling steel, plate length and tapping temperatures
Transmission rate.Meanwhile the entire length size of roller-way mechanism 20 is more than or equal to the length dimension of steel to be cooled.It in this way can be with
Guarantee that steel to be cooled possess enough cooling times, so that cooling steel can be complete after transporting on completing roller-way mechanism 20
Reach target cooling temperature.
Further, the periodically-varied for the transmission direction that mould group controls roller-way mechanism 20 is controlled by enabling, that
When needing the steel blocked up to thickness to cool down, by carrying out the transmission direction of roller-way mechanism 20 periodically
Change, the steel plate for just enabling to thickness excessive in this way is by strong convection cooling wind caused by upcast ventilation pipe 12 and lower air conduit 13
The effect of abundant cooling down, just ensure that cooling equipment can realize effective cooling drop to unconventional inclined thick steel plate in this way
Temperature.
In one embodiment of the invention, if monitoring mould group includes dry temperature sensor (not shown), each temperature sensing
Device corresponds to the outlet setting of roller-way mechanism 20, and each temperature sensor is electrically connected with control mould group.Specifically, each temperature
Sensor can also be evenly distributed in the opposite sides of the outlet of roller-way mechanism 20, just enable to each temperature sensor to be detected in this way
The tapping temperature of the steel to be cooled arrived is more accurate.
In one embodiment of the invention, as shown in Fig. 1~2, upcast ventilation pipe 12 has positioned at the top of roller-way mechanism 20
And the air outlet 121 in the two rows that the transmission direction of roller-way mechanism 20 is laid, it is respectively connected between air outlet 121 in two rows
Jet pipe 122, each upper 122 equal face roller-way mechanism 20 of jet pipe setting.Meanwhile lower air conduit 13 has positioned at the lower section of roller-way mechanism 20
And the air outlet 131 under the two rows that the transmission direction of roller-way mechanism 20 is laid, two rows are descended between air outlets 131 and are respectively connected with lower spray
Pipe 132, each lower 132 equal face roller-way mechanism 20 of jet pipe setting.Specifically, pass through air outlet 121 in the two rows for pipe 12 of being in the wind
Between multiple upper jet pipes 122 are set, the presence of upper jet pipe 122 each so just can equably spray cooling wind in steel
Upper surface, and the presence of each lower jet pipe 132 equally ensure that cooling wind can be sprayed with ground in the lower surface of steel, this
The upper and lower surface of sample steel just can be cooled down uniformly, and this esnures the cooling consistency of steel entirety.
In one embodiment of the invention, each upcast ventilation pipe 12 and each lower air conduit 13 be mounted on control valve (not shown) and
Pressure-detecting device (not shown), each control valve and each pressure-detecting device are electrically connected with control mould group.Specifically, by
Control valve is set on each upcast ventilation pipe 12 and each lower air conduit 13, and each control valve is electrically connected with control mould group, is controlled in this way
Mould group can control the on-off of each control valve and flow through the gas flow of each control valve.And then improve the automation of cooling equipment
Level, while also achieving the adjustable of cooling wind pressure.And by being respectively mounted pressure on each upcast ventilation pipe 12 and each lower air conduit 13
Detection device just ensure that control mould group can be realized the pressure water of monitoring and regulation each upcast ventilation pipe 12 and each lower air conduit 13 in this way
It is flat, and then ensure that steel in cooling procedure, the cooling uniformity of upper and lower surface.
In one embodiment of the invention, as shown in Fig. 1~2, roller-way mechanism 20 includes driving motor (not shown), becomes
Frequency device (not shown) and several roller-ways 21 for transporting to air-cooled steel, driving motor is electrically connected with frequency converter, frequency converter with
Control mould group electrical connection, each roller-way 21 along roller-way mechanism 20 transport direction arrangement and with driving motor transmission connection, it is each on
Jet pipe 122 is respectively positioned on the top of each roller-way 21, and each lower jet pipe 132 is respectively positioned on the lower section of each roller-way 21.Specifically, roller-way mechanism 20
In the process of running, control mould group exports electric signal to frequency converter, and frequency converter then drives according to the electric signal of control mould group output
The drive shaft turns of driving motor and the rotation direction for controlling drive shaft, and then realize to each roller-way being sequentially connected with drive shaft
The control of 21 velocity of rotation control and rotation direction.
In one embodiment of the invention, as shown in Fig. 2, being each formed with gap 22 between each roller-way 21, each gap 22
It is corresponding at least one lower jet pipe 132.Specifically, by making lower jet pipe 132 correspond to the gap 22 between each roller-way 21
Setting, just avoids each roller-way 21 in this way and causes to hinder to the gas injection path of lower jet pipe 132, then lower jet pipe 132 is sprayed
The gas of injection just can spray unblockedly to the lower surface of steel.
In one embodiment of the invention, as shown in Fig. 1~2, each upper jet pipe 122 is mounted on several top nozzles 123,
Each top nozzle 123 is arranged towards each roller-way 21, and each lower jet pipe 132 is mounted on several lower nozzles 133, and each lower nozzle 133 is
It extends into corresponding each gap 22.Specifically, since each upper jet pipe 122 and each lower jet pipe 132 are separately installed with several upper sprays
Mouth 123 and several lower nozzles 133 just further improve gas injection in the uniformity on steel in this way, and then ensure that
The consistency that steel cool.
Further, each top nozzle 123 is laid on corresponding upper jet pipe 122 in two rows, and the equal court of two rows of top nozzles 123
It is tilted to away from mutual side, has certain angle between corresponding two top nozzle 123.Top nozzle 123 each in this way can cover
It is placed on most of region of roller-way mechanism 20, so that the cooling uniformity of steel is more preferably.And the laying side of each lower nozzle 133
Formula is similarly.
In one embodiment of the invention, as shown in Figure 1, cooling blower 11 includes main body 111 and is installed on host
The main air hose 112 of the air outlet of body 111, upcast ventilation pipe 12 and lower air conduit 13 are all connected to main air hose 112.Specifically, cooling blower
When 11 work, the high-speed flow that main body 111 is sucked can flow through main 112 cocurrent of air hose to upcast ventilation pipe 12 and lower air conduit 13
It is interior, and then realize air-supply of the cooling blower 11 to upcast ventilation pipe 12 and lower air conduit 13.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of thermal treatment cooling equipment, it is characterised in that: including air cooling mechanism and for transporting the roller machine to air-cooled steel
Structure, the air cooling mechanism include cooling blower, upcast ventilation pipe and lower air conduit, and the upcast ventilation pipe and the lower air conduit are all connected to described
The air outlet of cooling blower, the upcast ventilation pipe and the lower air conduit both correspond to the roller-way mechanism and are arranged and are located at described
It is cooling to carry out strong convection to the steel being set in the roller-way mechanism above and below roller-way mechanism.
2. thermal treatment cooling equipment according to claim 1, it is characterised in that: the cooling equipment further includes monitoring mould group
With control mould group, the outlet that the monitoring mould group corresponds to the roller-way mechanism is arranged to monitor the temperature to air-cooled steel, described
Monitoring mould group and the roller-way mechanism are connect with the control mould group, and the control mould group is believed according to preset steel size
The temperature information to air-cooled steel of breath, cooling parameter information and the monitoring mould group passback controls the biography of the roller-way mechanism
The change of defeated rate and/or the periodically-varied of transmission direction.
3. thermal treatment cooling equipment according to claim 2, it is characterised in that: the monitoring mould group includes that several temperature pass
Sensor, each temperature sensor correspond to the roller-way mechanism outlet setting, and each temperature sensor with it is described
Mould group is controlled to be electrically connected.
4. thermal treatment cooling equipment according to claim 2, it is characterised in that: the upcast ventilation pipe, which has, is located at the roller-way
The top of mechanism and the air outlet in the two rows that the transmission direction of the roller-way mechanism is laid, between two rows of upper air outlets
It is connected with jet pipe, the setting of roller-way mechanism described in each upper equal face of jet pipe.
5. thermal treatment cooling equipment according to claim 4, it is characterised in that: the lower air conduit, which has, is located at the roller-way
The lower section of mechanism and the air outlet under the two rows that the transmission direction of the roller-way mechanism is laid connect between two rows of lower air outlets
It is connected to several lower jet pipes, the setting of roller-way mechanism described in each lower equal face of jet pipe.
6. thermal treatment cooling equipment according to claim 5, it is characterised in that: each upcast ventilation pipe and each lower air conduit
On be mounted on pressure-detecting device and control valve, each control valve and each pressure-detecting device with the control mould
Group electrical connection.
7. thermal treatment cooling equipment according to claim 5, it is characterised in that: the roller-way mechanism include driving motor,
Frequency converter and several roller-ways for transporting to air-cooled steel, the driving motor are electrically connected with the frequency converter, the frequency conversion
Device is electrically connected with the control mould group, each roller-way along the roller-way mechanism transport direction arrangement and with the driving it is electric
Machine transmission connection, each upper jet pipe are respectively positioned on the top of each roller-way, and each lower jet pipe is respectively positioned on each roller-way
Lower section.
8. thermal treatment cooling equipment according to claim 7, it is characterised in that: between being each formed between each roller-way
Gap, each gap are corresponding at least one lower jet pipe.
9. thermal treatment cooling equipment according to claim 8, it is characterised in that: each upper jet pipe is mounted on several
Nozzle, each top nozzle are arranged towards each roller-way, and each lower jet pipe is mounted on several lower nozzles, it is each it is described under
Nozzle extends into corresponding each gap.
10. described in any item thermal treatment cooling equipments according to claim 1~9, it is characterised in that: the cooling blower includes
The main air hose of main body and the air outlet for being installed on the main body, the upcast ventilation pipe and the lower air conduit are all connected to the master
Air hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910028508.5A CN109852767A (en) | 2019-01-11 | 2019-01-11 | Thermal treatment cooling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910028508.5A CN109852767A (en) | 2019-01-11 | 2019-01-11 | Thermal treatment cooling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109852767A true CN109852767A (en) | 2019-06-07 |
Family
ID=66894508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910028508.5A Pending CN109852767A (en) | 2019-01-11 | 2019-01-11 | Thermal treatment cooling equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109852767A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957339A (en) * | 2021-10-09 | 2022-01-21 | 深圳市我要模材科技有限公司 | High-strength steel block processing technology |
| CN113957320A (en) * | 2021-10-11 | 2022-01-21 | 深圳市我要模材科技有限公司 | Processing method of corrosion-resistant steel |
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| CN107299209A (en) * | 2017-05-26 | 2017-10-27 | 太原重工股份有限公司 | It is heat-treated cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570300Y (en) * | 2002-09-11 | 2003-09-03 | 陆峥 | Speed regulation and controlled blowing cooling device |
| CN101525683A (en) * | 2008-03-07 | 2009-09-09 | 中冶赛迪工程技术股份有限公司 | Heat-treated steel plate cooling device and cooling control method thereof |
| CN201704377U (en) * | 2010-05-28 | 2011-01-12 | 中冶南方(武汉)威仕工业炉有限公司 | Gas circulatory injection cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113957339A (en) * | 2021-10-09 | 2022-01-21 | 深圳市我要模材科技有限公司 | High-strength steel block processing technology |
| CN113957320A (en) * | 2021-10-11 | 2022-01-21 | 深圳市我要模材科技有限公司 | Processing method of corrosion-resistant steel |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210528 Address after: 417000 Shuangling building, no.1005, Gangui Road, Huangnitang, Louxing District, Loudi City, Hunan Province Applicant after: LYSTEEL Co.,Ltd. Applicant after: Hunan Hualing LIANGANG special new material Co., Ltd Address before: 417000 Shuangling building, no.1005, Gangui Road, Huangnitang, Louxing District, Loudi City, Hunan Province Applicant before: LYSTEEL Co.,Ltd. Applicant before: HUNAN HUALING LIANGANG STEEL SHEET Co.,Ltd. |
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Application publication date: 20190607 |
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| RJ01 | Rejection of invention patent application after publication |