CN213045144U - High-efficient pelletization device is used in powdered feed production - Google Patents

High-efficient pelletization device is used in powdered feed production Download PDF

Info

Publication number
CN213045144U
CN213045144U CN202021707199.9U CN202021707199U CN213045144U CN 213045144 U CN213045144 U CN 213045144U CN 202021707199 U CN202021707199 U CN 202021707199U CN 213045144 U CN213045144 U CN 213045144U
Authority
CN
China
Prior art keywords
face
fixed
belt pulley
welding
motor
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.)
Active
Application number
CN202021707199.9U
Other languages
Chinese (zh)
Inventor
赵立宇
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.)
Tianjin Tianjin Saip Technology Co ltd
Original Assignee
Tianjin Tianjin Saip Technology 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 Tianjin Tianjin Saip Technology Co ltd filed Critical Tianjin Tianjin Saip Technology Co ltd
Priority to CN202021707199.9U priority Critical patent/CN213045144U/en
Application granted granted Critical
Publication of CN213045144U publication Critical patent/CN213045144U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Glanulating (AREA)

Abstract

The utility model discloses a powdery feed production is with high-efficient pelletization device, its structure includes base, supplementary sieve material device, first motor, motor support, shaft coupling, pelletization main part, first feeder hopper and ejection of compact spout, the utility model discloses a powdery feed production is with high-efficient pelletization device, through set up supplementary sieve material device in the terminal surface bottom before the base, the motor drives drive mechanism and rotates, and drive mechanism drives intermittent mechanism and rotates, and intermittent mechanism drives sieve material device and rotates, and sieve material device can sieve out partial wastrel, then collects wastrel in unison through the stock chest, and the work load of wastrel is selected by the staff that significantly reduces like this, has improved fodder pelletization efficiency simultaneously.

Description

High-efficient pelletization device is used in powdered feed production
Technical Field
The utility model relates to a pelletization technical field, concretely relates to high-efficient pelletization device is used in powdered feed production.
Background
With the continuous development of animal husbandry, the fodder of raising the livestock also becomes diversified, and the granulator carries out the powder granulation technique and the fodder granulation equipment of development, and powder material machine equipment need not to add any binder and can directly make the required even granule product of user, chooses for use the fodder of different particle sizes according to the livestock of difference, so, we need use the high-efficient pelletization device for the production of powdered feed.
And current high-efficient pelletization device for powdered feed production is in the use, because partial wastrel can appear in the pelletization device in the treatment process, and this partial wastrel can influence holistic fodder qualification rate, so need the staff to manually pick the wastrel, so not only greatly increased staff's work burden, still reduced fodder pelletization efficiency simultaneously.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In order to overcome the defects of the prior art, the efficient granulating device for producing the powdery feed is provided, and the problems that partial defective products possibly appear in the treatment process of the granulating device, the defective products can influence the overall feed qualification rate, and therefore workers need to manually pick the defective products, the workload of the workers is greatly increased, and meanwhile the feed granulating efficiency is reduced are solved.
(II) technical scheme
The utility model discloses a following technical scheme realizes: the utility model provides a high-efficiency granulating device for producing powdery feed, which comprises a base, wherein a first motor is arranged in the middle of the right side of the top surface of the base, the middle of the bottom of the front end surface of the base is welded with the back of an auxiliary screening device, the auxiliary screening device comprises a fixed seat, a second motor, a power cord, an intermittent screening device, a first connecting shaft, a screening device, a second feeding hopper, a vertical plate, a material storage tank, a second connecting shaft and a second connecting rod, the middle of the bottom of the front end surface of the base is fixed with the back of the fixed seat by welding, the front end of the right side of the top surface of the fixed seat is fixed with the bottom surface of the second motor by a bolt, the right side of the second motor is connected with the power cord, the left side of the second motor is fixedly connected with the middle of the front end of the right side surface of the intermittent screening device, the, first connecting axle left end and sieve material device right flank middle part welding, sieve material device top face left side middle part is provided with the second feeder hopper, second feeder hopper back bottom middle part and the preceding terminal surface welding of second connecting rod to second connecting rod back is fixed through the welding with the base, sieve material device left surface middle part is fixed through the welding with second connecting axle right-hand member, second connecting axle left surface welds with riser right flank middle part, fixing base top face left side is provided with the stock chest.
First motor left surface middle part is fixed through the bolt with motor support right flank middle part to motor support bottom end face and base top end face middle part welding, base top end face left side middle part is connected with shaft coupling bottom end face, shaft coupling top end face is fixed through the welding with pelletization main part bottom end face middle part, pelletization main part top end face middle part welds with first feeder hopper bottom end face, the terminal surface middle part is provided with ejection of compact spout before the pelletization main part.
The material screening device comprises a material screening roller, a baffle and a handle, the left end of the first connecting shaft is welded with the middle of the right side face of the material screening roller, the baffle is arranged in the middle of the left side face of the top end face of the material screening roller, and the middle of the front end of the top end face of the baffle is fixed with the bottom end of the handle through welding.
The intermittent screening device comprises a shell, a transmission mechanism and an intermittent mechanism, the front end of the right side of the top end face of the fixing seat is welded with the bottom end face of the shell, the transmission mechanism is arranged in the shell, and the back of the transmission mechanism is connected with the intermittent mechanism.
The transmission mechanism comprises a first belt pulley, a belt and a second belt pulley, an output shaft at the front end of the second motor is connected with the middle part of the front end face of the first belt pulley, the belt is arranged on the outer surface of the first belt pulley, and the first belt pulley is in transmission connection with the second belt pulley through the belt.
The intermittent mechanism comprises a rotary table, a first connecting rod, a fixed column, an irregular rotating wheel, a fixed shaft, clamping grooves and a third connecting shaft, the middle of the front end face of the second belt wheel is connected with the middle of the front end face of the rotary table, the middle of the front end face of the rotary table is hinged to the middle of the left side of the back of the first connecting rod, the middle of the right end face of the back of the first connecting rod is welded to the front end face of the fixed column, the irregular rotating wheel is arranged on the right side face of the rotary table, the middle of the back of the irregular rotating wheel is connected with the front end face of the fixed shaft, 3 groups of clamping grooves.
The diameter of the fixing column is 5mm shorter than the width of the clamping groove, and the contact surfaces of the fixing column and the clamping groove are completely overlapped.
The width of the first belt pulley is 2cm longer than that of the belt, and the diameter of the first belt pulley is 15cm longer than that of the second belt pulley.
The first connecting rod is made of No. 45 steel.
The fixed column is made of stainless steel.
(III) advantageous effects
Compared with the prior art, the utility model, following beneficial effect has:
in order to solve the problem that partial defective products possibly appear in the treatment process of the granulating device and influence the overall feed qualification rate, the defective products are manually selected by workers, so that the workload of the workers is greatly increased, and meanwhile, the feed granulating efficiency is reduced.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the auxiliary material sieving device of the present invention;
FIG. 3 is a schematic side view of the auxiliary material sieving device of the present invention;
FIG. 4 is a schematic cross-sectional view of the intermittent sieving device of the present invention;
fig. 5 is a schematic structural view of the intermittent mechanism of the present invention.
In the figure: a base-1, an auxiliary screening device-2, a fixed seat-21, a second motor-22, a power cord-23, an intermittent screening device-24, a shell-241, a transmission mechanism-242, a first belt pulley-2421, a belt-2422, a second belt pulley-2423, an intermittent mechanism-243, a rotary disc-2431, a first connecting rod-2432, a fixed column-2433, an irregular rotary wheel-2434, a fixed shaft-2435, a clamping groove-2436, a third connecting shaft-2437, a first connecting shaft-25, a screening device-26, a screening roller-261, a baffle-262, a handle-263, a second feed hopper-27, a vertical plate-28, a storage groove-29, a second connecting shaft-210, a first motor-3, a motor bracket-4, a material storage groove-29, a second connecting shaft-210, a first motor-3, a motor, A coupler-5, a granulation main body-6, a first feed hopper-7 and a discharge chute-8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the present invention provides a high-efficiency granulating apparatus for producing powdered feed: comprises a base 1, a first motor 3 is arranged in the middle of the right side of the top end face of the base 1, the middle of the bottom end of the front end face of the base 1 is welded with the back of an auxiliary screening device 2, the auxiliary screening device 2 comprises a fixed seat 21, a second motor 22, a power cord 23, an intermittent screening device 24, a first connecting shaft 25, a screening device 26, a second feeding hopper 27, a vertical plate 28, a material storage tank 29, a second connecting shaft 210 and a second connecting rod 211, the middle of the bottom end of the front end face of the base 1 is fixed with the back of the fixed seat 21 by welding, the front end of the right side of the top end face of the fixed seat 21 is fixed with the bottom end face of the second motor 22 by bolts, the right side of the second motor 22 is connected with the power cord 23, the left side of the second motor 22 is fixedly connected with the middle of the front end of the right side face of the intermittent screening device 24, the middle of the left side face of the intermittent screening device 24, the middle of the left side of the top end face of the material sieving device 26 is provided with a second feeding hopper 27, the middle of the bottom end of the back of the second feeding hopper 27 is welded with the front end face of a second connecting rod 211, the back of the second connecting rod 211 is fixed with the base 1 through welding, the middle of the left side face of the material sieving device 26 is fixed with the right end of a second connecting shaft 210 through welding, the left side face of the second connecting shaft 210 is welded with the middle of the right side face of a vertical plate 28, and the left side of the top end face of a fixing seat.
3 left surface middle parts of first motor are fixed through the bolt with 4 right sides middle parts of motor support to 4 bottom surfaces of motor support and the welding of 1 top surface middle part of base, 1 top surface left side middle part of base is connected with 5 bottom surfaces of shaft coupling, 5 top surfaces of shaft coupling are fixed through the welding with 6 bottom surfaces of pelletization main part middle parts, 6 top surfaces of pelletization main part middle parts weld with 7 bottom surfaces of first feeder hopper, 6 preceding terminal surface middle parts of pelletization main part are provided with ejection of compact spout 8.
The material sieving device 26 comprises a material sieving roller 261, a baffle 262 and a handle 263, the left end of the first connecting shaft 25 is welded with the middle part of the right side face of the material sieving roller 261, the middle part of the left side face of the top end face of the material sieving roller 261 is provided with the baffle 262, and the middle part of the front end face of the top end face of the baffle 262 is fixed with the bottom end of the handle 263 through welding.
The intermittent screening device 24 comprises a shell 241, a transmission mechanism 242 and an intermittent mechanism 243, the front end of the right side of the top end face of the fixed seat 21 is welded with the bottom end face of the shell 241, the transmission mechanism 242 is arranged in the shell 241, and the back of the transmission mechanism 242 is connected with the intermittent mechanism 243.
The transmission mechanism 242 includes a first belt pulley 2421, a belt 2422 and a second belt pulley 2423, the front end output shaft of the second motor 22 is connected with the middle of the front end surface of the first belt pulley 2421, the belt 2422 is arranged on the outer surface of the first belt pulley 2421, and the first belt pulley 2421 and the second belt pulley 2423 are in transmission connection through the belt 2422.
The intermittent mechanism 243 comprises a rotary table 2431, a first connecting rod 2432, a fixed column 2433, an irregular rotating wheel 2434, a fixed shaft 2435, a clamping groove 2436 and a third connecting shaft 2437, the back of the second belt pulley 2423 is connected with the middle of the front end face of the rotary table 2431, the middle of the front end face of the rotary table 2431 is hinged with the middle of the left side of the back of the first connecting rod 2432, the middle of the right end of the back of the first connecting rod 2432 is welded with the front end face of the fixed column 2433, the right side face of the rotary table 2431 is provided with the irregular rotating wheel 2434, the middle of the back of the irregular rotating wheel 2434 is connected with the front end face of the fixed shaft 2435, the front end face of the irregular rotating wheel 2434 is provided with 3 groups of clamping.
The diameter of the fixed column 2433 is 5mm shorter than the width of the clamping groove 2436, and the contact surfaces of the fixed column 2433 and the clamping groove 2436 are completely overlapped, so that the fixed column 2433 is prevented from being clamped in the clamping groove 2436, and the equipment is prevented from stopping running.
The width of the first pulley 2421 is 2cm longer than the width of the belt 2422, and the diameter of the first pulley 2421 is 15cm longer than the diameter of the second pulley 2423, so that the belt 2422 is prevented from slipping off during rotation.
The first connecting rod 2432 is made of No. 45 steel, the No. 45 steel is high in hardness and strength, and the service life of the device can be prolonged.
The fixed column 2433 is made of stainless steel, the surface of the stainless steel is smooth, and the irregular rotating wheel 2434 can be driven to rotate conveniently.
The motor 22 described in this patent: the motor is an electromagnetic device for realizing electric energy conversion or transmission according to the electromagnetic induction law, the motor is represented by a letter M in a circuit, the motor mainly has the function of generating driving torque and is used as a power source of electrical appliances or various machines, the generator is represented by a letter G in the circuit, and the generator mainly has the function of converting mechanical energy into electric energy. The motor is divided according to the types of working power supplies: the motor can be divided into a direct current motor and an alternating current motor, (1) the direct current motor can be divided according to the structure and the working principle: brushless dc motors and brushed dc motors, (2) wherein the ac motor is further divided: single phase motors and three phase motors.
The working principle is as follows: when a user wants to use the device, the efficient granulating device for producing the powdered feed can be placed on the ground, the user puts the powdered feed into the granulating main body 6 through the first feeding hopper 7, then the user switches on the first motor 3, the first motor 3 drives the gear mechanism in the base 1, the gear mechanism drives the granulating mechanism in the granulating main body 6 to compress the powdered feed into feed particles, when the granulating is completed, the user pulls the handle 263 upwards, the handle 263 drives the baffle 262 to move upwards, the feed particles enter the second feeding hopper 27 through the discharging chute 8, then the feed particles enter the material sieving roller 261, then the user pushes the handle 263 downwards again, the handle 263 drives the baffle 262 to move downwards, the baffle 262 seals the material sieving roller 261, at the moment, the user switches on the power supply wire 23, and the second motor 22 starts to work, an output shaft at the front end of the second motor 22 drives the first belt pulley 2421 to rotate, and then the first belt pulley 2421 drives the second belt pulley 2423 to rotate through the belt 2422, the second belt pulley 2423 drives the rotary table 2431 to rotate, then the rotary table 2431 drives the first connecting rod 2432 to rotate, and then the first connecting rod 2432 drives the fixed column 2433 to rotate, so that the fixed column 2433 drives the irregular rotating wheel 2434 to rotate, the irregular rotating wheel 2434 drives the third connecting shaft 2437 to rotate, then the third connecting shaft 2437 drives the first connecting shaft 25 to rotate, and the first connecting shaft 25 drives the material sieving roller 261 to rotate, so that the material sieving roller 261 successfully sieves defective products out, the defective products fall into the storage tank 29, when the defective products in the storage tank 29 are full, a user can pull the storage tank 29 outwards to collect the internal defective products and then put the storage tank 29 back to the original place, and then the use can be continued.
The basic principle and the main characteristics of the utility model and the advantages of the utility model have been shown and described above, and the utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the record of the description with the drawing, and the concrete connection mode of each part all adopts conventional means such as ripe bolt rivet among the prior art, welding, and machinery, part and equipment all adopt prior art, conventional model, and conventional connection mode in the prior art is adopted in addition to circuit connection, and the details are not repeated here.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. An efficient granulating device for producing powdery feed comprises a base (1), wherein a first motor (3) is arranged in the middle of the right side of the top end face of the base (1);
the method is characterized in that: the material screening device comprises a base (1), a first connecting shaft (25), a material screening device (26), a second feeding hopper (27), a vertical plate (28), a storage tank (29), a second connecting shaft (210) and a second connecting rod (211), and is characterized by further comprising an auxiliary material screening device (2), wherein the middle part of the bottom end of the front end surface of the base (1) is welded with the back of the auxiliary material screening device (2), the auxiliary material screening device (2) comprises a fixed seat (21), a second motor (22), a power wire (23), an intermittent material screening device (24), a first connecting shaft (25), a material screening device (26), a second feeding hopper (27), a vertical plate (28), a material storage tank (29), a second connecting shaft (210) and a second connecting rod (211), the middle part of the bottom end of the front end surface of the base (1) is fixed with the back of the fixed seat (21), the front end of the right side surface of the fixed seat, intermittent type sieving mechanism (24) left surface middle part is connected with first connecting axle (25) right flank, first connecting axle (25) left end and the welding of sieving mechanism (26) right flank middle part, sieving mechanism (26) top surface left side middle part is provided with second feeder hopper (27), terminal surface welding before second feeder hopper (27) back bottom middle part and second connecting rod (211) to second connecting rod (211) back is fixed through the welding with base (1), sieving mechanism (26) left surface middle part is fixed through the welding with second connecting axle (210) right-hand member, second connecting axle (210) left surface welds with riser (28) right flank middle part, fixing base (21) top surface left side is provided with storage silo (29).
2. The efficient granulating device for powdered feed production according to claim 1, wherein: first motor (3) left surface middle part is fixed through the bolt with motor support (4) right surface middle part to motor support (4) bottom face and base (1) top end face middle part welding, base (1) top end face left side middle part is connected with shaft coupling (5) bottom face, shaft coupling (5) top end face is fixed through the welding with pelletization main part (6) bottom face middle part, pelletization main part (6) top end face middle part welds with first feeder hopper (7) bottom face, terminal surface middle part is provided with ejection of compact spout (8) before pelletization main part (6).
3. The efficient granulating device for powdered feed production according to claim 1, wherein: sieve material device (26) are including sieve material roller (261), baffle (262) and handle (263), first connecting axle (25) left end and sieve material roller (261) right flank middle part welding, sieve material roller (261) top terminal surface left side middle part is provided with baffle (262), baffle (262) top terminal surface front end middle part is fixed through the welding with handle (263) bottom.
4. The efficient granulating device for powdered feed production according to claim 1, wherein: the intermittent screening device (24) comprises a shell (241), a transmission mechanism (242) and an intermittent mechanism (243), the front end of the right side of the top end face of the fixed seat (21) is welded with the bottom end face of the shell (241), the transmission mechanism (242) is arranged inside the shell (241), and the back of the transmission mechanism (242) is connected with the intermittent mechanism (243).
5. The efficient granulating device for powdered feed production according to claim 4, wherein: the transmission mechanism (242) comprises a first belt pulley (2421), a belt (2422) and a second belt pulley (2423), an output shaft at the front end of the second motor (22) is connected with the middle of the front end face of the first belt pulley (2421), the belt (2422) is arranged on the outer surface of the first belt pulley (2421), and the first belt pulley (2421) is in transmission connection with the second belt pulley (2423) through the belt (2422).
6. The efficient granulating device for powdered feed production according to claim 5, wherein: the intermittent mechanism (243) comprises a rotary disc (2431), a first connecting rod (2432), a fixed column (2433), an irregular rotating wheel (2434), a fixed shaft (2435), a clamping groove (2436) and a third connecting shaft (2437), the back of the second belt pulley (2423) is connected with the middle part of the front end surface of the turntable (2431), the middle part of the front end surface of the rotary disc (2431) is hinged with the middle part of the left side of the back of the first connecting rod (2432), the middle part of the right end of the back of the first connecting rod (2432) is welded with the front end surface of the fixed column (2433), an irregular rotating wheel (2434) is arranged on the right side surface of the rotating disc (2431), the middle of the back of the irregular rotating wheel (2434) is connected with the front end surface of the fixed shaft (2435), the front end face of the irregular rotating wheel (2434) is provided with 3 groups of clamping grooves (2436), and the middle part of the front end face of the irregular rotating wheel (2434) is fixed with the back of the third connecting shaft (2437) through welding.
7. The efficient granulating device for powdered feed production according to claim 6, wherein: the diameter of the fixing column (2433) is 5mm shorter than the width of the clamping groove (2436), and the contact surfaces of the fixing column and the clamping groove are completely overlapped.
8. The efficient granulating device for powdered feed production according to claim 5, wherein: the width of the first belt pulley (2421) is 2cm longer than that of the belt (2422), and the diameter of the first belt pulley (2421) is 15cm longer than that of the second belt pulley (2423).
CN202021707199.9U 2020-08-17 2020-08-17 High-efficient pelletization device is used in powdered feed production Active CN213045144U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021707199.9U CN213045144U (en) 2020-08-17 2020-08-17 High-efficient pelletization device is used in powdered feed production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021707199.9U CN213045144U (en) 2020-08-17 2020-08-17 High-efficient pelletization device is used in powdered feed production

Publications (1)

Publication Number Publication Date
CN213045144U true CN213045144U (en) 2021-04-27

Family

ID=75582967

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021707199.9U Active CN213045144U (en) 2020-08-17 2020-08-17 High-efficient pelletization device is used in powdered feed production

Country Status (1)

Country Link
CN (1) CN213045144U (en)

Similar Documents

Publication Publication Date Title
CN210230573U (en) Powder coating circulation device that sieves
CN213045144U (en) High-efficient pelletization device is used in powdered feed production
CN211099290U (en) Medicine processingequipment
CN211413870U (en) Collecting mechanism for high-efficiency numerical control plate shearing machine
CN213051394U (en) A equipment of sieving for production of concentrated feed for pig
CN209331163U (en) A kind of installation for fermenting system being stirred rear blowing for high moisture material
CN213153436U (en) Device for accurately adjusting feeding with different component ratios
CN211992411U (en) High-efficient automatic feeding surface finish machine is used in forging production
CN212040897U (en) A smash and grind machine for traditional chinese medicine processing
CN206953350U (en) A kind of feed arrangement that can effectively prevent mechanical damage
CN214082337U (en) Feeding device of chemical accessory secondary forming machine
CN210230181U (en) High-efficient rubbing crusher
CN210699917U (en) Medicine grinding and mixing device for oncology department
CN202639165U (en) Multi-specification horizontal wire blanking device of wire mesh welding machine
CN211612467U (en) Probiotics powder solid beverage mixes machine
CN215028124U (en) Dedicated high-speed stirring mechanism of mechanical engineering
CN213315467U (en) Airflow crushing mechanism of glossy ganoderma spore powder broken wall device
CN221016575U (en) Resource cyclic utilization letter sorting equipment
CN221230760U (en) Prefabricated vegetable's raw materials reducing mechanism
CN213226977U (en) Intelligent grouting equipment assembly
CN218578242U (en) Abalone is labeller for production line
CN218957531U (en) Inductance double-disc feeding mechanism
CN210332977U (en) Silver ore is feed mechanism for system in small, broken bits
CN213677450U (en) Ton bag receiving device of feed factory
CN212468403U (en) Flour mill

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant