Background technology
China goes through setback in milk powder market and goes to today, and domestic powder and import powder in the fight of grabbing market " quality " and " safety " are the focuses that everybody pays close attention to always.While the quality standard of milk powder " composition " content is highly focused on, the concept of milk powder " commodity shelf-life " also enters the visual field of people gradually.Drawn to ring maximum be the impermeability of packing material the shelf-life.The rigid index that whether qualified evaluation packing material impermeability is is packing container " leakage rate ", produced packing container under industrial process conditions, because the reason of structure and material accomplishes that complete nothing " leakage " is impossible, importantly make a security leak amount corresponding with the necessary shelf-life.
Obtain the measuring method two kinds nothing more than of container amount of leakage size: one is malleation mensuration, namely add a suitable force value to container and keep a period of time, measuring the variable quantity of dwell pressure during this period; Another kind is negative pressure mensuration, is namely drawn into certain vacuum tightness to container and keeps a period of time, then the change of measurement of vacuum during this.Because the use condition of work of milk pot is with no pressure, the power that in tank, milk powder and tank outer air occur to exchange is mainly derived from the change of environment temperature.When temperature raises, the first expansion drum outer air of tank body is drawn onto in tank, and after temperature reduces, the pressure that in tank, the pressure in space becomes than being formed during packaging is little, and the air outside tank also can be inhaled into.Along with extraneous air is inhaled in tank, the moisture in air, microorganism, pollutant, dust etc. touch milk powder.So Jie of shelf-life draws surely according to this.
The efficiency of tank production line processed is all higher, and leak test plant is as a part for tank production line processed, and Fast Measurement pressure and pressure change are one of very important using function.Because the tank volume of milk pot is large, the time finding time to need is long, is the major obstacle improving detection speed.
The structural style of the milk pot cover used in the market has two kinds: one be seaming aluminium foil as inner cap, additional plastic outer cover.Another is circle lid seaming aluminium foil, and enclosing cover is buckled in circle and covers.The tank body of these two kinds lid shapes all will detect that aluminium foil is by the quality of sealing when hunting leak.When negative pressure in tank produces, outside atmospheric pressure broken for aluminium foil drum, can must have set of device to help and protect aluminium foil do not roused broken or pull.
The technology solution of above two aspects is special features that milk pot leak tester is different from other food cans leak testers.
Utility model content
The purpose of this utility model is for milk pot leak test plant detection speed in prior art slow, and efficiency is low, can not the problem of on-line checkingi, provides a kind of milk pot leak detection system that can hunt leak online fast.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:
A kind of milk pot is online leak detection system fast, and comprise frame, drive unit, tank sending device, cupping device, vacuum monitor device, controller, device for eliminating, described tank sending device is located in frame;
Described tank sending device includes tank arrangement and goes out tank arrangement;
Described cupping device comprises rotating disc type erecting frame, air distributing device, several measuring heads, vacuum pump, and described rotating disc type erecting frame is electrically connected with drive unit;
Described measuring head is uniformly distributed in rotating disc type erecting frame circumferentially, and measuring head comprises mount pad, described mount pad lower surface is provided with obturator, described obturator is covered with tested milk pot and mount pad lower surface is close at the upper end open place of milk pot, described milk pot lower end by liner foil sealing and be provided with outside liner aluminium foil outer fastening lid, described vacuum pump is communicated with mount pad by air distributing device;
Described cupping device is connected with elevating mechanism, and described elevating mechanism orders about cupping device and is entering the decline of tank arrangement place, is going out the rising of tank arrangement place;
Described vacuum monitor device, air distributing device, device for eliminating are all electrically connected with controller.
Further, be connected with air bag bottom described obturator, described air bag is communicated with the air outside cupping device by pipeline, cyst wall extruding liner aluminium foil bottom it during described airbag aeration.
Further, described drive unit comprises regulator cubicle and motor, described rotating disc type erecting frame drives with motor and is connected, described air distributing device comprises rotary gas distribution plate, reduction valve, gas joint, described rotary gas distribution plate is electrically connected with regulator cubicle, and described vacuum pump is communicated with mount pad by reduction valve, rotary gas distribution plate, gas joint successively.
Further, described vacuum monitor device is vacuum degree measuring instrument, and described controller is PLC, and described vacuum degree measuring instrument is electrically connected with PLC.
Further, a rolling wheel guide rails is installed with below described rotating disc type erecting frame, described rolling wheel guide rails upper surface is provided with concave, convex guide frame, described recessed guide frame is with to enter tank arrangement corresponding, described convex guide frame is with to go out tank arrangement corresponding, and described elevating mechanism comprises coupling shaft and roller, and described coupling shaft one end is fixedly connected with cupping device, the other end is connected with roller, and described roller rolls along rolling wheel guide rails circumference.
Further, described in enter tank arrangement and include tank belt conveyor, enter tank Variable pitch screw, enter tank driver plate, described in enter tank belt conveyor end and enter tank driver plate and be connected, described in enter tank Variable pitch screw and enter tank belt conveyor and be equipped with; Described go out tank arrangement comprise tank body and export belt, tank body pull-out screw rod, go out tank driver plate, described in go out tank driver plate and export belt one end with tank body and be connected, described tank body pulls out screw rod and tank body and exports belt and be equipped with.
As preferably, coaxial rotating disc is provided with below described rolling wheel guide rails, described rotating disc is provided with several retinue jigs, described retinue jig carries out clamping to cupping device, described rotating disc is provided with adjuster bar rotating disc type erecting frame being carried out to highly adjustment, and described adjuster bar is connected with rotating disc type erecting frame.
As preferably, described mount pad lower surface is provided with annular sealing gaskets, and described annular sealing gaskets size coordinates with tested milk pot openend.
As preferably, described obturator is food grade plastic material, and described obturator inside is provided with air strainer, and described gas joint is communicated with air strainer.
Further, described device for eliminating with go out tank driver plate and be equipped with.
The utility model is for the beneficial effect of prior art: the utility model establishes measuring head, measuring head is provided with mount pad, mount pad is communicated with a gas joint, gas joint connects a gas distribution plate, and measuring head is connected with an elevating mechanism, when elevating mechanism orders about measuring head decline, mount pad is near the tested milk pot entered on tank arrangement, simultaneously, gas joint vacuumizes tank body and makes to produce negative pressure in tank body, under the atmospheric effect in the external world, tested Milk powder tin body is inhaled on mount pad lower surface, now, vacuum monitor device is measured tank body, record first force value and send controller to, measuring head runs one period preset with tested milk pot, vacuum monitor device is measured tested milk pot again, record second force value and send controller to, through calculating, controller judges whether the difference of two force value exceedes the standard value preset, thus judge that whether tested milk pot is qualified.If the difference of two pressure exceedes established standards, then judge that tested milk pot is defective, controller controls device for eliminating, is rejected by defective milk pot; If the difference of two pressure does not exceed established standards, then judge that tested milk pot is qualified.The utility model adopts controller to be electrically connected with gas distribution plate, and gas distribution plate is connected with gas joint, and controller can control gas joint and inflate tested Milk powder tin body, simultaneously, elevating mechanism orders about measuring head and rises, thus discharges tested Milk powder tin body, makes it enter out tank arrangement.The utility model adopts negative pressure mensuration, is consistent because ambient temperature changes negative pressure condition in the tank caused with milk pot, reduces measuring error.
The utility model is comparatively large for Milk powder tin body volume, and the problem that vacuum pumping rate is slow, sets up an obturator in mount pad lower surface, at mount pad while tested milk pot, obturator is filled in Milk powder tin body, accelerates the discharge of gas in tank body, thus accelerates the speed vacuumized.
In the utility model, the input and output of tested milk pot are respectively by entering tank belt conveyor and tank body output belt, enter tank belt conveyor and tank body to export belt and can be combined by the transport tape on milk pot production line, therefore, leak detection system involved by the utility model can be combined with milk pot production line, thus realizes online leak detection.
Easily broken problem is roused for aluminium foil in tested tank body, the utility model establishes an air bag in obturator lower surface, this air bag is communicated with external atmosphere pressure by pipeline, therefore when tank body vacuumizes, extraneous air pours in air bag by pipeline, the aluminium foil of the tested tank body sealed end of air sac pressing, and allow it be close to outer fastening lid.After setting up a vacuum tightness in tank, all structural joints of tested tank body all demonstrate under the test that formed at inside and outside differential pressure, and inside and outside liner aluminium foil, two surface pressures are balances, therefore can not be broken by drum.
Mount pad lower surface is provided with Gask-O-Seal, and sealing pad size coordinates with tank body openend, and therefore, when tested tank body is inhaled in mount pad lower surface due to negative pressure, tank body openend can be inhaled on sealing gasket, prevents gas leakage.
Establish an air strainer in obturator, when gas joint is inflated to tank body, can ensure that the air in tank body is clean, thus ensure the hygienic standard of milk pot.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail:
embodiment 1as Figure 1-Figure 5, a kind of milk pot is online leak detection system fast, comprise frame 1, drive unit 2, tank sending device 3, cupping device 4, vacuum monitor device 5, controller 6, device for eliminating 8, described tank sending device 3 is located in frame 1, described tank sending device 3 includes tank arrangement 31 and goes out tank arrangement 32, described cupping device 4 comprises rotating disc type erecting frame 41, air distributing device 42, several measuring heads 43, vacuum pump 44, described rotating disc type erecting frame 41 is electrically connected with drive unit 2, described measuring head 43 is uniformly distributed in rotating disc type erecting frame 41 circumferentially, and be connected with rotating disc type erecting frame 41 by installation end 436, measuring head 43 comprises mount pad 431, described mount pad 431 lower surface is provided with obturator 432, described obturator 432 is covered with tested milk pot 7 and mount pad 431 lower surface is close at the upper end open place of milk pot 7, described milk pot 7 lower end is sealed by liner aluminium foil 71 and is provided with outer fastening lid 72 outside liner aluminium foil 71, described vacuum pump 44 is communicated with mount pad 431 by air distributing device 42, described cupping device 4 is connected with elevating mechanism 45, described elevating mechanism 45 orders about cupping device 4 and is entering the decline of tank arrangement 31 place, going out the rising of tank arrangement 32 place, described vacuum monitor device 5, air distributing device 42, device for eliminating 8 is all electrically connected with controller 6.
embodiment 2as the preferred embodiment of embodiment 1, be connected with air bag 433 bottom described obturator 432, described air bag 433 is communicated with the air outside cupping device 4 by pipeline, cyst wall extruding liner aluminium foil 71 bottom it when described air bag 433 is inflated.
embodiment 3as the preferred embodiment of embodiment 2, a kind of milk pot is online leak detection system fast, comprise frame 1, regulator cubicle 21, motor 22, enter tank arrangement 31, go out tank arrangement 32, air distributing device 42, device for eliminating 8 and not shown vacuum degree measuring instrument 5 and PLC 6, described air distributing device 42 comprises rotary gas distribution plate 421, reduction valve 422, gas joint 423, described vacuum pump 44 is successively by reduction valve 422, rotary gas distribution plate 421, gas joint 423 is communicated with mount pad 431, described rotary gas distribution plate 421 is electrically connected with regulator cubicle 21, described rotary gas distribution plate 421, vacuum degree measuring instrument 5, device for eliminating 8 is all electrically connected with PLC 6, described frame 1 is provided with rotating disc 47 from the bottom up successively, rolling wheel guide rails 46, rotating disc type erecting frame 41, described rotating disc type erecting frame 41 is driven by motor 22, rolling wheel guide rails 46 is fixedly installed, described rotating disc 47 is provided with adjuster bar 472 and several retinue jigs 471, described adjuster bar 472 is connected with rotating disc type erecting frame 41 and the height of regulating rotary disc type erecting frame 41, described rotating disc type erecting frame 41 is circumferentially evenly distributed with several measuring heads 43, described measuring head 43 comprises installation end 436, be located at the mount pad 431 of installation end 436 bottom, described mount pad 431 lower surface is provided with obturator 432, the lower surface of obturator 432 is provided with an air bag 433, described obturator 432 is covered with tested milk pot 7 with air bag 433, described installation end 436 is connected with rotating disc type erecting frame 41 and its side is fixedly connected with a coupling shaft 451, the free end of described coupling shaft 451 connects roller 452, described roller 452 rolls along the circumference of rolling wheel guide rails 46, described rolling wheel guide rails 46 upper surface is provided with recessed, convex guide frame 461, 462, described recessed guide frame 461 is corresponding with entering tank arrangement 31, roller 452 is mated guiding measuring head 43 and declines, described convex guide frame 462 is corresponding with going out tank arrangement 32, roller 452 is mated guiding measuring head 43 and rises.When measuring head 43 declines, mount pad 431 is clamped also near the tested milk pot 7 entered on tank arrangement 31 by retinue jig 471, air bag 433 and obturator 432 all insert tank interior, simultaneously, PLC controls rotary gas distribution plate 421 thus controls gas joint 423 pairs of tank bodies to vacuumize, negative pressure is produced in tank body, under external atmosphere pressure effect, hold mount pad 431 lower surface, meanwhile, extraneous air is filled with by pipeline in the blister cavities of air bag 433, air bag 433 expands, cyst wall bottom it extrudes the liner aluminium foil 71 of tested milk pot 7 sealed end and makes it be close to outer fastening lid 72, now, vacuum degree measuring instrument 5 tests its pressure to tested milk pot 7, obtain the first force value, and be sent to PLC 6, disc type erecting frame 41 runs to assigned address with measuring head 43 and tested milk pot 7, vacuum degree measuring instrument 5 is measured tested milk pot 7 again, obtain the second force value and be sent to PLC 6, through calculating, PLC 6 judges whether the difference of two force value exceedes the standard value preset, thus judge that whether tested milk pot is qualified.When tested milk pot is judged as substandard product, PLC 6 controls device for eliminating 8, is rejected by substandard product.When tested milk pot 7 runs to out tank arrangement 32 corresponding position, roller 452 coordinates with convex guide frame 462 to be ordered about measuring head 43 and rises, simultaneously, gas joint 423 is inflated by mount pad 431 pairs of milk pots 7, negative pressure in tank body disappears, and milk pot 7 comes off from measuring head 43, enters out tank arrangement 32.
embodiment 4described enter tank arrangement 31 include tank belt conveyor 311, enter tank Variable pitch screw 312, enter tank driver plate 313, described in enter tank belt conveyor 311 end and enter tank driver plate 313 and be connected, described in enter tank Variable pitch screw 312 and enter tank belt conveyor 311 and be equipped with; Described go out tank arrangement 32 comprise tank body export belt 321, tank body pull-out screw rod 322, go out tank driver plate 323, described go out tank driver plate 323 export belt 321 one end with tank body and be connected, described tank body pull-out screw rod 322 exports belt 321 with tank body and is equipped with, described enter tank belt conveyor 311 and tank body export the Tank-supporting device 33 belt 321 is all equipped with for support milk pot 7, described device for eliminating 8 with go out tank driver plate 323 and be equipped with.
embodiment 5described mount pad 431 lower surface is provided with annular sealing gaskets 434, and described annular sealing gaskets 434 size coordinates with tested milk pot 7 openend.
embodiment 6described obturator 432 is food grade plastic material, and described obturator 432 inside is provided with air strainer 435, and described gas joint 423 is communicated with air strainer 435.