CN211781055U - Ester fuel burner - Google Patents

Ester fuel burner Download PDF

Info

Publication number
CN211781055U
CN211781055U CN202020375271.6U CN202020375271U CN211781055U CN 211781055 U CN211781055 U CN 211781055U CN 202020375271 U CN202020375271 U CN 202020375271U CN 211781055 U CN211781055 U CN 211781055U
Authority
CN
China
Prior art keywords
combustion cavity
ester fuel
cavity
combustion
supporting base
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
Application number
CN202020375271.6U
Other languages
Chinese (zh)
Inventor
马荣侦
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CN202020375271.6U priority Critical patent/CN211781055U/en
Application granted granted Critical
Publication of CN211781055U publication Critical patent/CN211781055U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Spray-Type Burners (AREA)

Abstract

The utility model discloses an ester fuel burner, which comprises a supporting base, a burning cavity and a heat collecting ring which are arranged from bottom to top in sequence, a plurality of rows of inclined air holes are annularly and uniformly distributed on the side wall of the combustion cavity, the oil nozzles are horizontally fixed on the supporting base and are communicated with the interior of the combustion cavity, two heating plates which are overlapped up and down are fixedly connected at the bottom of the combustion cavity, a cavity heating pipe for vaporizing the ester fuel is embedded between the two heating plates, an oil nozzle is arranged with a gap on the side wall of the combustion cavity, an oil inlet of the oil nozzle is communicated with an oil tank through an electromagnetic pump and a diesel filter in sequence, the electromagnetic pump and the diesel filter are arranged in a constant-temperature metal shell, a shell heating pipe for preventing the ester fuel from solidifying is inserted in a constant temperature metal shell at the periphery of the diesel filter, an oil tank heating pipe for preventing the ester fuel from being solidified is inserted in the oil tank, and an ignition needle with a needle head extending into the combustion cavity is arranged on the supporting base. The utility model discloses be favorable to the improvement of ester fuel mobility.

Description

Ester fuel burner
Technical Field
The utility model relates to a combustor technical field especially relates to an ester fuel combustor.
Background
Biodiesel (Biodiesel) is an emerging industry that rises in the 21 st century and has certain market advantages, both from the standpoint of energy crisis mitigation and environmental protection. With the rapid development of the automobile industry in the world and the continuous improvement of the market competitiveness of the biodiesel, the application prospect of the biodiesel is more and more extensive. The research on biodiesel is also receiving more and more attention, which is an unblocked development trend, and countries need to cooperate to make greater progress.
The government of China sets some policies and measures for solving the problems of energy conservation, replacement and environmental protection, and some scholars and experts have been dedicated to research and advocate work on biodiesel. Although the research and development of the biodiesel in China are relatively late, the development speed is very high, and part of scientific research achievements reach the international advanced level. At present, all the researches obtain staged results, which undoubtedly help the further research and development of the biodiesel in China.
Because the main component of the biodiesel used as the cooking range fuel oil is the mixture of various fatty acid methyl esters, precipitates and colloids are possibly generated in different environments due to uncertainty of a condensation point in the storage and use processes, if a burner described in the authorized bulletin No. CN 202328227U is directly adopted, the problem of blockage of an oil nozzle is easily caused, the problems of abnormal use of equipment, low heat utilization rate and insufficient combustion are obvious, resource waste is caused in the use and maintenance processes, the large background of the sustainable development society built in China is not met, and a convenient, efficient and environment-friendly ester fuel burner is urgently needed in the market at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a better ester fuel combustor of combustion effect to prior art's weak point.
The utility model provides an ester fuel burner, which comprises a supporting base, a burning cavity and a heat collecting ring which are sequentially arranged from bottom to top, a plurality of rows of inclined air holes are uniformly distributed on the side wall of the burning cavity in an annular manner, an oil nozzle is horizontally fixed on the supporting base and is communicated with the inside of the burning cavity, two heating plates which are overlapped up and down are fixedly connected at the bottom of the burning cavity, a cavity heating pipe for vaporizing the ester fuel is embedded between the two heating plates, the oil nozzle is arranged with the side wall of the burning cavity in a clearance manner, an oil inlet of the oil nozzle is communicated with an oil tank through an electromagnetic pump and a diesel filter in sequence, the electromagnetic pump and the diesel filter are arranged in a constant temperature metal shell, a plurality of shell heating pipes for preventing the ester fuel from being solidified are inserted in the constant temperature metal shell at the periphery of the diesel filter, a plurality of, an ignition needle with a needle head extending into the combustion cavity is arranged on the supporting base.
The wall of the combustion cavity is in a step shape with a large top and a small bottom, the inclined air holes are arranged on the side wall of the small end section of the combustion cavity, adjacent rows of the inclined air holes are arranged in a staggered mode, the two heating plates are fixedly connected with the combustion cavity through threaded fasteners, and the bottom of each heating plate is provided with a heating plate heat-sensitive sensor used for monitoring the temperature of the combustion cavity during working.
The side wall of the large end section of the combustion cavity is uniformly provided with a plurality of umbrella-shaped inclined holes which play roles in oxygenating and gathering fire.
In order to promote sufficient combustion, a plurality of upper air holes which are obliquely arranged in an umbrella shape are uniformly distributed on the heat collecting ring, and the upper air holes are communicated with the inside of the supporting base through air holes arranged at the top of the combustion cavity.
The bottom of the heat collecting ring is provided with an annular groove which is convenient for the communication of the air inlet and the air vent in any direction.
And pins for limiting the horizontal movement among the support base, the combustion cavity and the heat collecting ring are arranged on the support base, the combustion cavity and the heat collecting ring.
The ignition device comprises a support base, a combustion cavity, an ignition needle support, a pin bolt, a positioning hole, a coaxial and horizontal arrangement positioning hole, an ignition needle support and a pin bolt, wherein the positioning hole is formed in the support base and corresponds to the combustion cavity, the ignition needle support is fixedly installed on the support base right below the positioning hole, and the ignition needle is inserted into the positioning hole and detachably connected to the ignition needle support through the pin.
A cross rod is arranged in the supporting base below the combustion cavity, a spring seat is arranged on the cross rod, a compression spring is arranged in the spring seat, and the heating plate is jacked up by the compression spring and is closely connected with the bottom of the combustion cavity.
In order to facilitate the taking out and the maintenance of the ignition needle, a high-voltage wire clamping groove is fixed at the bottom of the cross rod through a screw, the ignition needle is vertically inserted into the high-voltage wire clamping groove, and the needle head of the ignition needle sequentially penetrates through the cross rod, the spring seat and the heating disc and then extends into the combustion cavity.
The bottom of the heat collecting ring is provided with a spigot used for limiting the horizontal movement between the combustion cavity and the supporting base.
The utility model prevents the deposit and colloid generated in the storage and use process of the ester fuel from blocking the oil nozzle by arranging the electromagnetic pump and the diesel filter between the oil inlet of the oil nozzle and the oil tank; the electromagnetic pump and the diesel oil filter are arranged in the constant-temperature metal shell with the shell heating tube arranged inside, so that the temperature of the ester fuel is raised after heat exchange is completed before the ester fuel enters the combustion cavity, and the problem that the ester fuel is solidified in winter is avoided. The utility model discloses be favorable to ester fuel flow property and combustion performance's improvement, reduced unnecessary difficult emergence, guaranteed the normal use of user.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged partial sectional view of a portion of fig. 1.
Fig. 3 is a schematic structural diagram of the present invention.
The labels shown in the figures and the corresponding component names are:
1. a support base; 11. positioning holes; 12. a cross bar; 13. a spring seat; 14. a compression spring; 15. A barrel; 16. sealing the cover; 17. a main air inlet hole; 18. an inner cavity thermal sensor;
2. a combustion chamber; 21. oblique wind holes; 22. heating the plate; 23. a cavity heating pipe; 24. a heating pan thermal sensor; 25. an umbrella-shaped inclined hole; 26. a vent hole; 27. a taper hole; 28. a positioning cylinder;
3. a heat collecting ring; 31. an air inlet hole; 32. an annular groove; 33. a pin; 34. stopping the opening;
4. a nozzle tip; 41. a nipple seat; 42. an oil jet;
5. an electromagnetic pump;
6. a diesel filter;
7. a constant temperature metal housing; 71. a shell heating pipe; 72. a housing thermal sensor; 73. heat insulation cotton;
8. an oil tank; 81. an oil tank heating pipe; 82. an oil filling port; 83. an oil outlet; 84. a heat-insulating layer; 85. A fuel tank thermal sensor;
9. an ignition needle; 91. an ignition needle holder; 92. a pin; 93. a high-voltage line clamping groove;
Detailed Description
Example one
As can be seen from figures 1 and 2, the ester fuel burner of the utility model comprises a supporting base 1, a burning cavity 2, a heat collecting ring 3, a nozzle 4, an electromagnetic pump 5, a diesel filter 6, a constant temperature metal shell 7, an oil tank 8 and an ignition needle 9,
the supporting base 1 is cylindrical with a large upper part and a small lower part, a main air inlet hole 17 is formed in the middle of the upper end opening and the lower end bottom of the supporting base 1, and the main air inlet hole 17 is connected with a fan through an air conveying pipe;
the combustion chamber 2 is arranged on the supporting base 1 through the outer edge arranged at the top, the body wall of the combustion chamber 2 is in a step shape with a large upper part and a small lower part and is arranged in the supporting base 1, the supporting base 1 and the combustion chamber 2 are provided with positioning holes 11 which are coaxially arranged at corresponding positions, four rows of inclined air holes 21 are annularly and uniformly distributed on the side wall of the small end section of the combustion chamber 2, and the inclined air holes 21 of two adjacent rows are arranged on the circumferential surface of the combustion chamber 2 in a staggered way; the bottom of the combustion cavity 2 is fixedly connected with two heating plates 22 which are arranged in an up-down overlapping mode through screws, and the butt joint face of the two heating plates 22 is provided with a groove which is arranged in an up-down butt joint mode; a cavity heating pipe 23 is embedded in the groove between the two heating plates 22 and is used for vaporizing the ester fuel in the combustion cavity 2; a heating plate heat-sensitive sensor 24 for monitoring the temperature in the combustion cavity 2 is arranged at the bottom of the heating plate 22; a plurality of umbrella-shaped inclined holes 25 which play roles of oxygenation and fire gathering are uniformly arranged on the side wall of the large end section of the combustion cavity 2; a plurality of vent holes 26 communicated with the inside of the supporting base 1 are uniformly arranged at the top of the edge outside the combustion cavity;
the heat collecting ring 3 is sleeved at the top of the combustion cavity 2, a plurality of upper air holes 31 which are obliquely arranged in an umbrella shape are uniformly distributed on the heat collecting ring 3, the bottom of the heat collecting ring 3 is provided with an annular groove 32 which is communicated with the upper air holes 31 and the vent holes 26, and the upper air holes 31 can be communicated with the vent holes 26 no matter how many angles the heat collecting ring 3 rotates on the combustion cavity 2 by the communication effect of the annular groove 32;
the oil nozzle 4 comprises an oil nozzle seat 41 and an oil nozzle 42 arranged at the front end of the oil nozzle seat 41, and the oil nozzle seat 41 is horizontally fixed on the outer wall of the supporting base 1 by using threads; a taper hole 27 with a shape corresponding to that of the oil nozzle 42 is formed on the side wall of the combustion cavity 2, the oil nozzle 42 and the taper hole 27 are coaxially arranged and communicated with the interior of the combustion cavity 2 through the taper hole 27, and the oil nozzle 42 is arranged in the taper hole 27 and is arranged in a clearance with the taper hole 27;
the electromagnetic pump 5 and the diesel filter 6 are arranged in the constant-temperature metal shell 7, the oil outlet of the diesel filter 6 is communicated with the inlet of the electromagnetic pump 5 through an oil pipe, and the outlet of the electromagnetic pump 5 is communicated with the oil inlet of the oil nozzle base 41 through an oil pipe; a plurality of shell heating pipes 71 are inserted in the constant-temperature metal shell 7 on the periphery of the diesel filter 6 in a surrounding manner, the shell heating pipes 71 generate heat and transfer the heat to the electromagnetic pump 5 and the diesel filter 6 through the constant-temperature metal shell 7, so that the ester fuel is prevented from being solidified at low temperature; a shell thermosensitive sensor 72 for monitoring the internal temperature of the thermostatic metal shell 7;
a plurality of oil tank heating pipes 81 for preventing ester fuel from solidifying are inserted in the oil tank 8, an oil filling port 82 is arranged at the upper part of the oil tank 8, an oil outlet 83 is arranged at the lower part of the oil tank 8, an oil inlet of the diesel oil filter 6 is communicated with the oil outlet 83 through an oil pipe, a heat insulation layer 84 is wrapped at the periphery of the oil tank 8, and an oil tank heat-sensitive sensor 85 for monitoring the internal temperature of the oil tank 8 is arranged on the oil;
ignition needle 9 cartridge is in locating hole 11, and inside ignition needle 9 syringe needle stretched into combustion chamber 2, fixed mounting had ignition needle support 91 on the support base 1 under locating hole 11, and ignition needle 9 rear end passes through cotter 92 can dismantle the connection on ignition needle support 91.
The utility model discloses in, electromagnetic pump 5 adopts the VSC63-A5 electromagnetic pump of Olympa company production, and this electromagnetic pump is by power direct drive, and is small, need not external motor. Is commonly used for small-sized burners below 8 ten thousand kilocalories. The oil output pressure is 8KG, and the flow rate is 8 KG.
As can be seen from fig. 2, in the present invention, the ignition needle 9 is a one-piece bipolar ceramic ignition needle, and the terminals of the ignition needle are different in length.
As can be seen from fig. 1, in the present invention, the heat collecting ring 3 is connected with the supporting base 1 and the combustion chamber 2 through a plurality of pins 33 which are uniformly arranged, and the pins 33 limit the movement of the supporting base 1, the combustion chamber 2 and the heat collecting ring 3 in the horizontal direction; the movement of the combustion cavity 2 and the vertical direction of the supporting base 1 is controlled by the oil nozzle 4 and the ignition needle 9 fixed on the outer wall of the supporting base 1, so that the convenient installation and maintenance of the combustor are realized.
As can be seen from figure 1, the corresponding position of the support base 1 of the utility model is provided with a via hole which is convenient for the heating plate heat-sensitive sensor 24 signal transmission line and the cavity heating pipe 23 wire to be worn out.
Example two
As can be seen from fig. 3, the difference from the first embodiment is that the supporting base 1 in this embodiment is composed of a cylinder 15 and a sealing cover 16 fixed at the bottom of the cylinder 15 by screws, the cylinder 15 is in a cylindrical shape with a large top and a small bottom, and a main air inlet 17 is arranged in the middle of the sealing cover 16 and connected with a fan through an air delivery pipe;
the inner cavity of the combustion cavity 2 is in a straight cylinder shape, the diameter of the inner cavity of the combustion cavity 2 is smaller than that of the combustion cavity 2 in the first embodiment, the combustion cavity 2 is arranged on the supporting base 1 through the outer edge arranged at the top, and four rows of inclined air holes 21 are uniformly distributed on the side wall of the combustion cavity 2 in an annular mode; the vent holes 26 are uniformly arranged at the top of the outer edge of the combustion cavity 2 and are communicated with the inside of the supporting base 1; a positioning cylinder 28 is horizontally welded on the side wall of the combustion cavity 2;
the heat collecting ring 3 is sleeved at the top of the combustion cavity 2, the upper opening of the heat collecting ring 3 is of a bowl-shaped structure communicated with the vent hole 26, and the upper opening of the heat collecting ring 3 can be communicated with the vent hole 26 no matter how many angles the heat collecting ring 3 rotates on the combustion cavity 2;
the oil nozzle 4 adopts a self-flow oil nozzle and is horizontally fixed on the outer wall of the supporting base 1 by threads, the oil nozzle 4 and the positioning cylinder 28 are coaxially arranged, an oil nozzle of the oil nozzle 4 is arranged in the positioning cylinder 28 and communicated with the interior of the combustion cavity 2 through an inner cavity of the positioning cylinder 28, and the oil nozzle 4 is arranged with a gap on the side wall of the combustion cavity 2 through the positioning cylinder 28;
a cross bar 12 is arranged on a cylinder body 15 below the combustion cavity 2, a spring seat 13 is detachably arranged on the cross bar through a screw, a compression spring 14 is arranged in the spring seat 13, the two heating plates 22 are vertically butted into a whole through a threaded fastener and placed in the spring seat 13, the two heating plates 22 are jacked up by the compression spring 14 and are tightly connected with the bottom of the combustion cavity 2, and the heat conduction efficiency is ensured; a high-voltage wire clamping groove 93 is fixed at the bottom of the cross bar 14 through a screw, the ignition needle 9 is vertically inserted into the high-voltage wire clamping groove 93, and the needle head of the ignition needle 9 sequentially penetrates through the cross bar 12, the spring seat 13 and the heating plate 22 and then extends into the combustion cavity 2.
As can be seen from FIG. 3, the inner cavity thermal sensor 18 for measuring the temperature of the supporting base 1 during operation is installed on the outer side surface of the supporting base 1.
As can be seen from FIGS. 1 and 3, in either the first embodiment or the second embodiment, the outer edge of the bottom of the heat collecting ring 3 is provided with a spigot 34 extending downwards, the heat collecting ring 3 is sleeved on the outer edges of the combustion chamber 2 and the supporting base 1 through the spigot 34, and the horizontal movement between the combustion chamber 2 and the supporting base 1 is fixed, so that the burner is convenient to install and maintain.
As can be seen from fig. 1 and 3, in both the first embodiment and the second embodiment, in order to reduce heat loss and prevent scald caused by people touching, the constant temperature metal shell 7 of the present invention is covered with a thermal insulation cotton 73.

Claims (10)

1. The utility model provides an ester fuel combustor, includes by support base (1), combustion chamber (2) and heat collection circle (3) that supreme arranged gradually down, and annular equipartition has a plurality of rows of oblique wind hole (21) on the combustion chamber lateral wall, glib talker (4) level is fixed on supporting the base and is arranged its characterized in that with the inside intercommunication of combustion chamber: the fixed connection has heating plate (22) that two superposes were arranged from top to bottom in combustion chamber bottom, it is equipped with cavity heating pipe (23) that are used for letting ester fuel vaporization to inlay between two heating plates, glib talker and combustion chamber lateral wall clearance arrange, glib talker oil inlet loops through electromagnetic pump (5) and diesel filter (6) and oil tank (8) intercommunication, electromagnetic pump and diesel filter install in a constant temperature metal casing (7), the cartridge has a plurality of casing heating pipe (71) that are used for preventing that ester fuel solidifies in the constant temperature metal casing of diesel filter periphery, a plurality of oil tank heating pipes (81) that are used for preventing ester fuel solidification are equipped with in the oil tank interpolation, it stretches into inside ignition needle (9) of combustion chamber to install the syringe needle on the supporting pedestal.
2. An ester fuel burner as claimed in claim 1, wherein: the wall of the combustion cavity is in a step shape with a large top and a small bottom, the inclined air holes are arranged on the side wall of the small end section of the combustion cavity, adjacent rows of the inclined air holes are arranged in a staggered mode, the two heating plates are fixedly connected with the combustion cavity through threaded fasteners, and a heating plate heat-sensitive sensor (24) used for monitoring the temperature of the combustion cavity during working is arranged at the bottom of each heating plate.
3. An ester fuel burner as claimed in claim 2, wherein: a plurality of umbrella-shaped inclined holes (25) which play roles of oxygenation and fire gathering are uniformly arranged on the side wall of the large end section of the combustion cavity.
4. An ester fuel burner as claimed in claim 2, wherein: a plurality of upper air holes (31) which are obliquely arranged in an umbrella shape are uniformly distributed on the heat collecting ring, and the upper air holes are communicated with the inside of the supporting base through air holes (26) arranged at the top of the combustion cavity.
5. An ester fuel burner as claimed in claim 4, wherein: the bottom of the heat collecting ring is provided with an annular groove (32) which is convenient for the communication of the air inlet and the air vent in any direction.
6. An ester fuel burner as claimed in claim 2, wherein: and pins (33) used for limiting the horizontal movement among the support base, the combustion cavity and the heat collecting ring are arranged on the support base, the combustion cavity and the heat collecting ring.
7. An ester fuel burner as claimed in claim 2, wherein: the supporting base and the combustion cavity are provided with positioning holes (11) which are coaxially and horizontally arranged at corresponding positions, an ignition needle support (91) is fixedly arranged on the supporting base under the positioning holes, and an ignition needle is inserted into the positioning holes and detachably connected to the ignition needle support through a pin bolt (92).
8. An ester fuel burner as claimed in claim 1, wherein: a cross rod (12) is arranged in the supporting base below the combustion cavity, a spring seat (13) is arranged on the cross rod, a compression spring (14) is arranged in the spring seat, and the heating plate is jacked up by the compression spring and is tightly connected with the bottom of the combustion cavity.
9. An ester fuel burner as claimed in claim 8, wherein: a high-voltage wire clamping groove (93) is fixed at the bottom of the cross rod through a screw, the ignition needle is vertically inserted into the high-voltage wire clamping groove, and the needle head of the ignition needle sequentially penetrates through the cross rod, the spring seat and the heating plate and then extends into the combustion cavity.
10. An ester fuel burner as claimed in claim 2 or 8, wherein: the bottom of the heat collecting ring is provided with a spigot (34) used for limiting the horizontal movement between the combustion cavity and the supporting base.
CN202020375271.6U 2020-03-23 2020-03-23 Ester fuel burner Expired - Fee Related CN211781055U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020375271.6U CN211781055U (en) 2020-03-23 2020-03-23 Ester fuel burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020375271.6U CN211781055U (en) 2020-03-23 2020-03-23 Ester fuel burner

Publications (1)

Publication Number Publication Date
CN211781055U true CN211781055U (en) 2020-10-27

Family

ID=72931323

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020375271.6U Expired - Fee Related CN211781055U (en) 2020-03-23 2020-03-23 Ester fuel burner

Country Status (1)

Country Link
CN (1) CN211781055U (en)

Similar Documents

Publication Publication Date Title
CN211781055U (en) Ester fuel burner
CN2872149Y (en) Methanol cooker
CN201810411U (en) Cylinder cover of diesel engine
CN209881589U (en) Intelligent generating set
CN205939306U (en) Energy gathering ring and gas stove
CN215112612U (en) Oxygen combustion gun with rotary flame
CN201488040U (en) Energy-saving strong fire stove
CN221301975U (en) Methanol instillation cracking device
CN213331351U (en) Oil injection device of diesel engine
CN207247199U (en) A kind of gas-cooker of upper inlet wind type burner and dress upper inlet wind type burner
CN210662956U (en) Alcohol-based fuel combustion device
CN214841708U (en) Heating system based on boiler body waste heat recovery
CN215489785U (en) Low-temperature flue gas heating combustion device
CN210291878U (en) Changming lantern convenient to overhaul
CN205245168U (en) Take combustor in hole that leaks
CN2804630Y (en) Pentane fuel burner
CN220970749U (en) Improved sealing baking device for intermediate tank
CN215712572U (en) Glass kiln material channel heating device
CN204756921U (en) Alcohol base liquid fuel electronics gasification kitchen shower nozzle
CN211650247U (en) Oil-gas dual-purpose burner
CN216361414U (en) Energy-conserving heating stove convenient to remove
CN212777483U (en) Automatic ignition and gas supply synchronous efficient energy-saving device for commercial stove
CN215979635U (en) Methanol waste heat utilization efficient engine
CN2288346Y (en) Rotary flame burner
CN213901139U (en) Gas stove with flameout protection function

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201027