CN106742839A - A kind of chemical industry rapping equipment with drive device - Google Patents

A kind of chemical industry rapping equipment with drive device Download PDF

Info

Publication number
CN106742839A
CN106742839A CN201611071320.1A CN201611071320A CN106742839A CN 106742839 A CN106742839 A CN 106742839A CN 201611071320 A CN201611071320 A CN 201611071320A CN 106742839 A CN106742839 A CN 106742839A
Authority
CN
China
Prior art keywords
rapping
motor
beater
module
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611071320.1A
Other languages
Chinese (zh)
Inventor
刘希民
吴兴滨
杨冬
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.)
Luoyang Yixing Petrochemical Electrical Appliance & Instrumentation Co Ltd
Original Assignee
Luoyang Yixing Petrochemical Electrical Appliance & Instrumentation Co Ltd
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 Luoyang Yixing Petrochemical Electrical Appliance & Instrumentation Co Ltd filed Critical Luoyang Yixing Petrochemical Electrical Appliance & Instrumentation Co Ltd
Priority to CN201611071320.1A priority Critical patent/CN106742839A/en
Publication of CN106742839A publication Critical patent/CN106742839A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00Large containers
    • B65D88/54Large containers characterised by means facilitating filling or emptying
    • B65D88/64Large containers characterised by means facilitating filling or emptying preventing bridge formation
    • B65D88/66Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices

Abstract

The invention discloses a kind of chemical industry rapping equipment with drive device, including transmission device, beater, rapping body and spring, the transmission device is by motor, electromagnetic clutch, reel, fixed pulley and running block into, one end of the electromagnetic clutch is connected to the output shaft of motor, the other end of the electromagnetic clutch is connected to reel, the one ends wound of a number rope is on reel, the other end of a number rope is fixed on fixed pulley after bypassing fixed pulley and movable pulley successively, the central shaft both sides of the movable pulley are provided with two symmetrical No. two ropes, the lower end of No. two ropes is connected to the two ends of bearing pin, the beater is arranged right below rapping body, the top both sides of the rapping body are slidably connected on wall respectively, and the downside outer ring of rapping body is socketed with spring.Driving force needed for of the invention is smaller, and the face of beating is arc contact surface, can increase contact area, the service life of extension fixture.

Description

A kind of chemical industry rapping equipment with drive device
Technical field
The present invention relates to a kind of chemical plant installations, specifically a kind of chemical industry rapping equipment with drive device.
Background technology
There are the phenomenons such as chemical substance adhesion, caking in course of conveying, easily in bulk material in rotary barrel, Especially dry material and half dry material, so as to influence the use of subsequent process.Accordingly, it would be desirable to take measures to avoid material as far as possible Adhesion, caking.Because the inside configuration of rotary barrel can not install rake teeth rake arms, therefore rapping need to be carried out outside rotary barrel and struck Hit, the dynamics of percussion is too small not to reach ramping effect, it is excessive and easily make rotary barrel casing deformation or damage.
A kind of rapping apparatus disclosed in Chinese patent (CN 204021612U) although solves above mentioned problem, but motor The driving torsion of needs is larger, and easily motor is caused to damage, and beater is provided when actually used without extra torsion, can not 360 ° of rotations, additionally, rapping body is smaller with beater and by the contact surface of rapping object, device serious wear, performance reduction.
The content of the invention
It is an object of the invention to provide a kind of chemical industry rapping equipment with drive device, with solving above-mentioned background technology The problem of proposition.
To achieve the above object, the present invention provides following technical scheme:
A kind of chemical industry rapping equipment with drive device, including transmission device, beater, rapping body, spring and by rapping object, The transmission device is made up of motor, electromagnetic clutch, reel, fixed pulley, rope, movable pulley and No. two ropes, described One end of electromagnetic clutch is connected to the output shaft of motor, and the other end of the electromagnetic clutch is connected to reel, described No. one On reel, the other end of a rope to bypass be fixed on after fixed pulley and movable pulley successively determines cunning to the one ends wound of rope On wheel, the fixed pulley is fixed on wall, and the movable pulley is located at the underface of fixed pulley, the central shaft two of the movable pulley Side is provided with two symmetrical No. two ropes, and the lower end of No. two ropes is connected to the two ends of bearing pin, and the bearing pin is located at rapping The center of hammer, and bearing pin is fixed with beater by stud, the beater is the cylinder of horizontally set Structure, the beater is arranged right below rapping body, and the upper end of the rapping body is provided with a groove, under the rapping body Hold and be provided with No. two grooves, the underface that rapping body is located at by rapping object, the top both sides of the rapping body are slided respectively It is connected on wall, and the downside outer ring of rapping body is socketed with spring, the spring is compression spring, and the upper end of the spring leads to Cross rapping body and carry out screens and fix, the lower end of the spring carries out screens and fixes by wall;The motor uses drive device Drive, drive device includes serial communication modular, single-chip minimum system, motor drive module, serial ports download module, charactron Display module, motor drive current detection module and Independent keys control module, the single-chip minimum system is used as whole system The control core of system, the pulse for producing control stepper motor to rotate is distributed by the software programming of single-chip microcomputer instead of loop pulse The pulse signal of device output control stepper motor, the umber of pulse that the angular dimension that stepper motor is rotated is exported to single-chip microcomputer is directly proportional The speed that stepper motor is rotated is directly proportional to the pulse frequency of output, and the direction that stepper motor is rotated is suitable with the pulse of output Sequence is relevant, while SCM system is also responsible for the current value that treatment is detected from motor drive current detection module, it is same with this When, the motor-driven electric current that single-chip microcomputer will detect motor speed, the rotation direction of motor and current detection module By numeral method out;The motor drive module amplifies the signal power that single-chip microcomputer issues stepper motor, so as to drive Dynamic motor work;The serial ports download module carries out the communication between computer and single-chip microcomputer, by what is write in computer Download program is in the middle of singlechip chip;The numeral method module shows motor speed, motor steering and by motor The system such as electric current real time information;The electric current that the motor drive current detection module detection passes through motor drive ic, so The signal that will be detected by amplifier afterwards is amplified, finally by the signal after amplification by after modulus conversion chip ADC0804 treatment Give single-chip microcomputer;The Independent keys are used as an exterior interrupt, and one-chip machine port connection, by it there is provided motor The functions such as rotating forward, reversion, acceleration, deceleration and display current of electric, the method call interruption being combined using interruption and inquiry Service routine, complete to stepper motor it is optimal, timely control.
As further scheme of the invention:The fixed pulley is identical with the dimensional structure of movable pulley.
As further scheme of the invention:A number groove is arc, and arc radius for groove are more than shaking Beat the section radius of hammer.
As further scheme of the invention:No. two grooves are arc, and No. two arc radius of groove are more than quilt The section radius of rapping object.
Compared with prior art, the beneficial effects of the invention are as follows:Coordinated with movable pulley by fixed pulley is carried out to beater Lifting, it is possible to reduce the torsion of motor half drives, and reduces load, while when movable pulley is moved up and down, due to its stress Position or so alternately, contributes to beater to rotate, and can cause that the acting surface of beater is uniform, additionally, by rapping body Upper and lower side is respectively equipped with arc groove, can increase the contact area between each part, reduces the abrasion of device, extends it and uses Life-span.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the left view schematic diagram of beater part in the present invention.
Fig. 3 is the theory diagram of drive device in the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Fig. 1~2 are referred to, in the embodiment of the present invention, a kind of chemical industry rapping equipment with drive device, including motor 1, electricity Magnet clutch 2, reel 3,4, rope 5 of fixed pulley, 6, No. two ropes 7 of movable pulley, stud 8, beater 9, bearing pin 10, Rapping body 11, spring 12 and by rapping object 13, the transmission device by motor 1, electromagnetic clutch 2, reel 3, fixed pulley 4, Number rope 5, movable pulley 6 and No. two ropes 7 are constituted, and one end of the electromagnetic clutch 2 is connected to the output shaft of motor 1, institute The other end for stating electromagnetic clutch 2 is connected to reel 3, and the electromagnetic clutch 2 is used to for the power of motor 1 to be delivered to reel 3 Or disconnect power transmission between motor 1 and reel 3, the one ends wound of a rope 5 on reel 3, described No. one The other end of rope 5 is fixed on fixed pulley 4 after bypassing fixed pulley 4 and movable pulley 6 successively, and the fixed pulley 4 is fixed on wall On, the movable pulley 6 is located at the underface of fixed pulley 4, and fixed pulley 4 is identical with the dimensional structure of movable pulley 6, can avoid one Number rope 5 is twisted together in extensional motion, and the central shaft both sides of the movable pulley 6 are provided with two symmetrical No. two ropes 7, described two The lower end of number rope 7 is connected to the two ends of bearing pin 10, and the bearing pin 10 is located at the center of beater 9, and bearing pin 10 with shake Play hammer 9 to be fixed by stud 8, the beater 9 is the cylindrical structure of horizontally set, and the beater 9 is just Lower section is provided with rapping body 11, and the upper end of the rapping body 11 is provided with a groove 111, and a groove 111 is arc, and one Number arc radius of groove 111 are easy to beater 9 that one can be preferably acted on when beating more than the section radius of beater 9 On number groove 111, the lower end of the rapping body 11 is provided with No. two grooves 112, and No. two grooves 112 are arc, and No. two recessed The arc radius of groove 112 be more than by the section radius of rapping object 13, be easy to rapping body 11 can preferably act on by On rapping object 13 so that stress is more uniform, the underface that rapping body 11 is located at by rapping object 13, the rapping body 11 Top both sides be slidably connected on wall respectively, and the downside outer ring of rapping body 11 is socketed with spring 12, and the spring 12 is Compression spring, the upper end of the spring 12 carries out screens and fixes by rapping body 11, and the lower end of the spring 12 is entered by wall Row screens is fixed.
Operation principle of the invention is:When needing rapping mounted in by material in rapping object 13, by controller(Not Show)Controlled motor 1 starts so that electromagnetic clutch 2 is engaged with the output shaft of motor 1, and the power of motor 1 is delivered to reel 3, with So that reel 3 is rotated, so that a rope 5 is wrapped on reel 3, because the other end of a rope 5 is fixed on fixed pulley 4 On, so that drive movable pulley 6 to move up by a rope 5, and then beater 9 is taken up, then controller controls electromagnetism Clutch 2 so that electromagnetic clutch 2 is separated with motor 1, the power of motor 1 is not delivered on reel 3, so that beater 9 is at it Hurtled down in the presence of gravity, rapping body 11 is impacted by beater 9, rear spring 12 shrinks, 11 pairs of quilts of rapping body Rapping object 13 carries out rapping, is flicked rapidly due to the rebound effect of spring 12 after rapping, completes a rapping process, this Outward, when a rope 5 drives movable pulley 6 to rise, the left side stress of movable pulley 6 is larger, when movable pulley 6 declines, movable pulley 6 Right side stress it is larger, contribute to beater 9 to rotate, with cause beater 9 it is more uniform with the contact point of rapping body 11, extension the longevity Life.
The motor is driven using drive device, and drive device includes serial communication modular, single-chip minimum system, motor Drive module, serial ports download module, numeral method module, motor drive current detection module and Independent keys control module, The single-chip minimum system produces the pulse of control stepper motor rotation, by monolithic as the control core of whole system The software programming of machine replaces the pulse signal of cycle pulse distributor output control stepper motor, and the angle that stepper motor is rotated is big The be directly proportional speed of stepper motor rotation of the small umber of pulse exported to single-chip microcomputer is directly proportional with the pulse frequency for exporting, and stepping is electric The direction that machine is rotated is relevant with the pulse sequence of output, while SCM system is also responsible for treatment from motor drive current inspection The current value that module is detected is surveyed, at the same time, single-chip microcomputer will be motor speed, the rotation direction and current detecting of motor The motor-driven electric current that module is detected passes through numeral method out;Single-chip microcomputer is issued stepping by the motor drive module The signal power of motor is amplified, so that motor works;The serial ports download module is carried out between computer and single-chip microcomputer Communication, in the middle of the download program that will be write in computer to singlechip chip;The numeral method module shows motor The real time information of the system such as rotating speed, motor steering and the electric current that passes through motor;The motor drive current detection module detection By the electric current of motor drive ic, then amplified by the signal that amplifier will be detected, finally pass through the signal after amplification Single-chip microcomputer is given after modulus conversion chip ADC0804 treatment;The Independent keys are used as an exterior interrupt, and monolithic generator terminal Mouthful connection, by it there is provided the rotating forward of motor, reversion, accelerations, slowing down and the display function such as current of electric, using interruption with The method call interrupt service routine that is combined of inquiry, complete to stepper motor it is optimal, timely control.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.Any reference in claim should not be considered as the claim involved by limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (4)

1. a kind of chemical industry rapping equipment with drive device, including transmission device, beater, rapping body, spring and by rapping pair As, it is characterised in that:The transmission device is by motor, electromagnetic clutch, reel, fixed pulley, rope, movable pulley and No. two Rope is constituted, and one end of the electromagnetic clutch is connected to the output shaft of motor, and the other end of the electromagnetic clutch is connected to Reel, on reel, the other end of a rope bypasses fixed pulley and dynamic cunning to the one ends wound of a rope successively It is fixed on fixed pulley after wheel, the fixed pulley is fixed on wall, the movable pulley is located at the underface of fixed pulley, described dynamic The central shaft both sides of pulley are provided with two symmetrical No. two ropes, and the lower end of No. two ropes is connected to the two ends of bearing pin, institute State bearing pin to be fixed by stud with beater positioned at the center of beater, and bearing pin, the beater is horizontal stroke To the cylindrical structure for setting, the beater is arranged right below rapping body, and the upper end of the rapping body is provided with a groove, The lower end of the rapping body is provided with No. two grooves, the underface that rapping body is located at by rapping object, the rapping body it is upper Portion both sides are slidably connected on wall respectively, and the downside outer ring of rapping body is socketed with spring, and the spring is compression spring, institute State the upper end of spring screens is carried out by rapping body and fix, the lower end of the spring carries out screens and fixes by wall;The electricity Machine is driven using drive device, and drive device includes serial communication modular, single-chip minimum system, motor drive module, serial ports Download module, numeral method module, motor drive current detection module and Independent keys control module, the single-chip microcomputer are minimum System produces the pulse of control stepper motor rotation, by the software programming generation of single-chip microcomputer as the control core of whole system For the pulse signal of cycle pulse distributor output control stepper motor, the angular dimension that stepper motor is rotated is exported with single-chip microcomputer Umber of pulse be directly proportional stepper motor rotation speed with output pulse frequency be directly proportional, and stepper motor rotation direction Pulse sequence with output is relevant, while SCM system is also responsible for what treatment was detected from motor drive current detection module Current value, at the same time, the electricity that single-chip microcomputer will detect motor speed, the rotation direction of motor and current detection module The electric current that machine drives passes through numeral method out;The motor drive module is issued the signal power of stepper motor by single-chip microcomputer Amplify, so that motor works;The serial ports download module carries out the communication between computer and single-chip microcomputer, will be in computer In the download program that writes in the middle of singlechip chip;Numeral method module display motor speed, motor steering with And the real time information of the system such as the electric current for passing through motor;The motor drive current detection module detection passes through motor drive ic Electric current, the signal that then will be detected by amplifier amplified, and the signal after amplification finally is passed through into modulus conversion chip Single-chip microcomputer is given after ADC0804 treatment;The Independent keys pass through as an exterior interrupt, and one-chip machine port connection It is provided with the functions such as rotating forward, reversion, acceleration, deceleration and the display current of electric of motor, is combined using interruption and inquiry Method call interrupt service routine, complete to stepper motor it is optimal, timely control.
2. the chemical industry rapping equipment with drive device according to claim 1, it is characterised in that:The fixed pulley and dynamic cunning The dimensional structure of wheel is identical.
3. the chemical industry rapping equipment with drive device according to claim 1, it is characterised in that:A number groove is arc Shape, and an arc radius for groove are more than the section radius of beater.
4. the chemical industry rapping equipment with drive device according to claim 1, it is characterised in that:No. two grooves are arc Shape, and No. two arc radius of groove are more than by the section radius of rapping object.
CN201611071320.1A 2016-11-29 2016-11-29 A kind of chemical industry rapping equipment with drive device Pending CN106742839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611071320.1A CN106742839A (en) 2016-11-29 2016-11-29 A kind of chemical industry rapping equipment with drive device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611071320.1A CN106742839A (en) 2016-11-29 2016-11-29 A kind of chemical industry rapping equipment with drive device

Publications (1)

Publication Number Publication Date
CN106742839A true CN106742839A (en) 2017-05-31

Family

ID=58905398

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611071320.1A Pending CN106742839A (en) 2016-11-29 2016-11-29 A kind of chemical industry rapping equipment with drive device

Country Status (1)

Country Link
CN (1) CN106742839A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108816711A (en) * 2018-08-17 2018-11-16 林德添 A kind of chemical industry rapping equipment with driving device
CN111118243A (en) * 2020-01-20 2020-05-08 济南华北升降平台制造有限公司 Pulling and vibrating driving equipment of blast furnace maintenance and disassembly robot and working method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202160141U (en) * 2011-08-12 2012-03-07 西华大学 Remote stepper motor control system based on GSM module
CN102457222A (en) * 2010-10-21 2012-05-16 刘小珍 Singlechip and VC++-based step motor control device
CN202272375U (en) * 2011-10-20 2012-06-13 攀钢集团西昌钢钒有限公司 Mechanical vibration device
CN202889274U (en) * 2012-06-29 2013-04-17 上海理工大学 Controller for stepping motor
CN204021612U (en) * 2014-08-18 2014-12-17 扬州金圆化工设备有限公司 A kind of rapping apparatus
CN204624357U (en) * 2015-05-12 2015-09-09 宁波大学 A kind of Chemical Manufacture rapping apparatus
CN204652271U (en) * 2015-03-31 2015-09-16 卢贶 A kind of two-phase stepping motor control system
CN105119541A (en) * 2015-09-28 2015-12-02 中国矿业大学 DSP (digital signal processor)-based stepper motor control system
CN204928646U (en) * 2015-07-09 2015-12-30 谢秋鸿 Multi -functional step motor controlling means
CN106100474A (en) * 2016-07-29 2016-11-09 无锡研奥电子科技有限公司 A kind of step motor control system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102457222A (en) * 2010-10-21 2012-05-16 刘小珍 Singlechip and VC++-based step motor control device
CN202160141U (en) * 2011-08-12 2012-03-07 西华大学 Remote stepper motor control system based on GSM module
CN202272375U (en) * 2011-10-20 2012-06-13 攀钢集团西昌钢钒有限公司 Mechanical vibration device
CN202889274U (en) * 2012-06-29 2013-04-17 上海理工大学 Controller for stepping motor
CN204021612U (en) * 2014-08-18 2014-12-17 扬州金圆化工设备有限公司 A kind of rapping apparatus
CN204652271U (en) * 2015-03-31 2015-09-16 卢贶 A kind of two-phase stepping motor control system
CN204624357U (en) * 2015-05-12 2015-09-09 宁波大学 A kind of Chemical Manufacture rapping apparatus
CN204928646U (en) * 2015-07-09 2015-12-30 谢秋鸿 Multi -functional step motor controlling means
CN105119541A (en) * 2015-09-28 2015-12-02 中国矿业大学 DSP (digital signal processor)-based stepper motor control system
CN106100474A (en) * 2016-07-29 2016-11-09 无锡研奥电子科技有限公司 A kind of step motor control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108816711A (en) * 2018-08-17 2018-11-16 林德添 A kind of chemical industry rapping equipment with driving device
CN111118243A (en) * 2020-01-20 2020-05-08 济南华北升降平台制造有限公司 Pulling and vibrating driving equipment of blast furnace maintenance and disassembly robot and working method thereof

Similar Documents

Publication Publication Date Title
CN106742839A (en) A kind of chemical industry rapping equipment with drive device
CN107148326A (en) Hit working rig
CN103201529A (en) Magnetic bearing control device, and exhaust pump provided with the device
CN201261010Y (en) Dual-spindle circular vibration exciter
CN207192254U (en) Current divider
CN201137683Y (en) Crusher energy conservation equipment
CN104174971B (en) The double parallelogram endless-rotating groove cutting head of type is driven at the end
CN206567009U (en) A kind of adaptive load grinding machine with permanent magnet direct-drive system
CN107795128A (en) A kind of slidingtype concrete vibrating device
CN203878641U (en) High-frequency crusher
CN106338362A (en) Energy-saving dynamic wheel balancer
CN207064565U (en) A kind of belt pulley torsional balancer structure
CN206943126U (en) The support meanss to be played a protective role to overhanging piston rod
CN206795832U (en) A kind of intelligent machine manufactures grabbing device
CN105486044B (en) Fiber production drying machine
CN202484192U (en) Double-shaft self-balancing movement mechanism for jaw crusher
CN103394393B (en) A kind of rotor block of Reversible crusher
CN103301901A (en) Double-shaft flywheel-free movement mechanism for jaw crusher
CN206737892U (en) A kind of adjustable more well linkage oil-pumps
CN207287602U (en) A kind of medical medicinal material lapping device with decrease of noise functions
CN209250776U (en) A kind of monitoring arrangement of agricultural machinery
CN205934920U (en) Construct dedicated pile driver
CN106081574A (en) A kind of turning device
CN207629218U (en) A kind of spindle drive attachment device
CN206339234U (en) A kind of portable automatic laser marks device for dotting

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
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20170531

WD01 Invention patent application deemed withdrawn after publication