CN108760197B

CN108760197B - Milk powder tank leak detection machine

Info

Publication number: CN108760197B
Application number: CN201810797672.8A
Authority: CN
Inventors: 陈振东
Original assignee: Ningbo Aiteshi Intelligent Equipment Co ltd
Current assignee: Ningbo Aiteshi Intelligent Equipment Co ltd
Priority date: 2018-07-19
Filing date: 2018-07-19
Publication date: 2020-04-14
Anticipated expiration: 2038-07-19
Also published as: CN108760197A

Abstract

The invention discloses a milk powder tank leak detection machine, and belongs to the technical field of precision leak detection equipment. Its technical scheme main points are milk powder jar leak hunting machine, including rotating frame, elevating system, leak hunting device and aerating device, leak hunting device is including running through testing platform's the pole of aerifing, be fixed in the testing platform bottom and supply the sealed butt in border sealing member and the joint of milk powder jar body in the pole of aerifing and stretch into the internal filling member of milk powder jar, the pole of aerifing has the inflatable passageway of confession aerating device, the filling member has the leak hunting passageway of intercommunication inflatable passageway and milk powder jar inner chamber, the upper end of the pole of aerifing is parallelly connected has a pressure transmitter, milk powder jar leak hunting machine is higher to the leak hunting precision of milk powder jar.

Description

Milk powder tank leak detection machine

Technical Field

The invention relates to a milk powder tank leak detection machine.

Background

In order to ensure the quality of the milk powder in the milk powder tank, a leak test of the milk powder tank storing the milk powder is required. At present, when a tank with an upper opening is detected, the upper opening of the tank is sealed and covered by a sealing cover plate, an air charging device is used for charging air into the tank, so that the air pressure in an inner cavity of the tank is increased, and the change of the air pressure in a closed container is measured by a pressure transmitter. Because what the leak hunting of milk powder jar generally adopted is the mode of low pressure leak hunting, if adopt the mode of above-mentioned sealed apron to carry out the leakproofness to the jar body and detect, the pressure variation value of milk powder jar inner chamber is lower, and when the damage on the milk powder jar is less, pressure transmitter can't detect and reveal, and whole milk powder jar leak hunting device's leak hunting precision is lower.

Disclosure of Invention

The invention aims to provide a milk powder tank leak detection machine which is high in leak detection precision of a milk powder tank.

The technical purpose of the invention is realized by the following technical scheme:

a milk powder tank leak detection machine comprises a rotary frame, a driving mechanism for driving the rotary frame to rotate, an annular lifting slide rail arranged outside the rotary frame, a plurality of lifting mechanisms which are arranged on the frame in a sliding manner and can slide along the annular lifting slide rail, a leak detection device which is in one-to-one correspondence with the lifting mechanisms and an inflation device for supplying air to the leak detection device, wherein the rotary frame comprises a detection platform for installing the leak detection device, the lifting mechanisms are provided with lifting platforms for placing milk powder tanks and in one-to-one correspondence with the leak detection device, the leak detection device comprises an inflation rod which penetrates through the detection platform, a sealing element which is fixed at the bottom of the detection platform and seals and butts at the upper edge of a milk powder tank body and a filling element which is connected with the inflation rod and extends into the milk powder tank body, the inflation rod is provided with an inflation channel for inflating the inflation device, and the filling element is provided with, and the upper end of the inflating rod is connected with a pressure transmitter in parallel.

Through adopting above-mentioned technical scheme, when using above-mentioned milk powder jar leak hunting device, at first place the milk powder jar on lift platform, because rotating frame drives elevating system and leak hunting device simultaneously, make lift platform do the elevating system for leak hunting device, when the last border butt of milk powder jar is on the sealing member, in the filling member entering milk powder jar of leak hunting device, aerating device aerifys in to the milk powder jar this moment, and detect the pressure variation in the milk powder jar through pressure transmitter, realize the detection whether leaks gas to the milk powder jar.

Compared with the traditional leakage detection device, the leakage detection device has the advantages that the volume for accommodating air in the inner cavity of the tank body is reduced by arranging the filling piece inserted into the inner cavity of the tank body, and when air in the tank body leaks, the air pressure variation of the inner cavity of the milk powder tank caused by the air leakage with the same volume is increased, so that the leakage detection precision of the whole leakage detection device is improved.

As a further improvement of the invention, the filling piece is provided with an installation blind hole for clamping and inserting the inflation tube, the outer side wall of the filling piece is circumferentially provided with at least two clamping channels communicated with the installation blind hole and a clamping piece arranged in the clamping channels, the inflation rod is provided with a second clamping ring groove for abutting the clamping piece, and the clamping piece is provided with an elastic telescopic clamping joint capable of being clamped in the second clamping ring groove.

Through adopting above-mentioned technical scheme, the setting of above-mentioned structure can make things convenient for the installation of packing, only need with the packing follow supreme insert on the pole of inflating from down can, through the mutual joint of elastic expansion joint and second joint annular, can realize the installation of packing.

As a further improvement of the present invention, when the filling member is fastened and fixed to the inflation rod, the bottom of the mounting blind hole has a filling cavity communicated with the inflation channel, the bottom of the mounting blind hole is further provided with an air guide hole, and the leak detection channel includes at least two first leak detection channels arranged circumferentially and communicated with the filling cavity and arranged radially, and at least two second leak detection channels arranged circumferentially and communicated with the lower end of the air guide hole and arranged radially.

Through adopting above-mentioned technical scheme, fill the setting of chamber, first leak hunting passageway and second leak hunting passageway and can make the leak hunting device more even to aerifing of milk powder jar. The air that aerating device lets in the gas filling pole firstly leads to filling the intracavity, later respectively through first leak hunting passageway and second leak hunting passageway entering milk powder jar in the inner chamber.

As a further improvement of the invention, the lifting platform comprises a platform base fixed on the top of the support rod, a platform top plate arranged on the platform base and a support spring arranged between the platform top plate and the platform base, wherein at least three first bolts which penetrate through the platform base and are in threaded fit with the platform top plate are circumferentially arranged at the bottom of the platform base.

Through adopting above-mentioned technical scheme, above-mentioned lift platform's structure for the platform roof can float for the platform base, helps promoting lift platform to the support stationarity of milk powder jar, when making milk powder jar and leak hunting device's sealing member butt, guarantees to give the holding surface of milk powder jar for the horizontality.

As a further improvement of the invention, the middle part of the platform top plate is provided with a first through hole.

Through adopting above-mentioned technical scheme, when the bottom of milk powder jar pastes with the platform roof, first through-hole is relative with the bottom of milk powder jar, when disappointing appears in the bottom of milk powder jar, and first through-hole can supply this part gas outgoing.

As a further improvement of the invention, the lifting mechanism further comprises a lifting base and a supporting rod for supporting the lifting platform, the lifting base is provided with an installation through hole for the supporting rod to be vertically inserted, the lifting base is also provided with an elastic clamping assembly abutted against the first clamping ring groove, and the elastic clamping assembly comprises a first ball partially clamped in the first clamping ring groove and a first spring for pressing the first ball into the first clamping ring groove.

Through adopting above-mentioned technical scheme, when at whole milk powder jar leak hunting machine at the operation in-process, when placing milk powder jar on lift platform and other components when taking place to interfere, whole elevating system can be in overload state, the decurrent pressure that the bracing piece received can increase to drive elasticity joint subassembly, make first ball break away from in the first joint annular groove of bracing piece, the bracing piece can be followed the installation through-hole promptly and dropped, reduced the impaired probability of bracing piece after taking place overload state.

As a further improvement of the invention, the top of the platform top plate is circumferentially provided with at least three magnet grooves and adsorption magnets respectively arranged in the magnet grooves, and the top of the platform top plate is also provided with a metal cover plate which is provided with a second through hole opposite to the first through hole.

Through adopting above-mentioned technical scheme, because milk powder jar generally has metallic iron to make, set up on the platform roof and adsorb the magnetite, help improving the cooperation intensity of lift platform and milk powder jar, reduce the probability that the milk powder jar dropped from lift platform.

As a further improvement of the invention, the inflation device comprises a filter, a first one-way valve, a second one-way valve and an air pumping and releasing component, wherein an air inlet of the filter is communicated with the atmosphere, and an air outlet of the filter is communicated with the detection end; the first check valve and the second check valve are sequentially connected in series between the filter and the detection rod, and only allow air to be conducted from the filter to the detection rod; and the air pumping and releasing assembly is arranged between the first one-way valve and the second one-way valve and conveys the atmosphere to the detection end after passing through the filter.

By adopting the technical scheme, the principle of the low-pressure leak detection device is as follows: firstly, the inflation rod is communicated with a closed container to realize the communication of a low-pressure leak detection device; then, the air in the atmosphere passes through the filter and the first one-way valve in sequence by the air pumping and releasing assembly, and then is subjected to transition storage; then, the air pumping and exhausting assembly leads the air to the closed container through the second one-way valve and the detection end, so that the air pressure in the closed container is increased, and the purpose of leak detection is realized.

Compared with the traditional leak detection device adopting an air pump or an air storage tank, the low-pressure leak detection device disclosed by the invention only transfers air in the atmosphere, and the air in the atmosphere enters the closed container to be detected only through the first one-way valve, the air pumping and discharging component, the second one-way valve and the air charging rod after passing through the filter, so that the air entering the closed container is clean, and the pollution of leak detection gas to the inner cavity of the closed container is prevented.

Meanwhile, compared with the mode that a filter is arranged between the gas storage tank/the gas pump and the detection end, the gas output by the gas storage tank and the gas pump contains a large amount of impurities and water vapor, and although the filter can filter the impurities and the water vapor, the filter pressure of the filter is high, and the replacement frequency of a filter element in the filter is too high; the filter in the invention is directly communicated with the atmosphere, and the low-pressure leak detection device is generally arranged in a dust-free workshop, so that the filtering pressure of the filter is smaller, the replacement frequency of a filter element in the filter is smaller, and the daily maintenance cost of the whole aerating device is reduced.

As a further improvement of the present invention, the exhaust assembly includes a detection cylinder and an air source, a detection piston of the detection cylinder divides an inner cavity of the detection cylinder into an exhaust cavity and a driving cavity, the exhaust cavity is connected between a first one-way valve and a second one-way valve, a connecting piece is arranged on the outer side of the detection cylinder on a detection piston rod, a return spring is arranged between a shell of the detection cylinder and the connecting piece on the detection piston, the air source is communicated with the driving cavity and supplies air to the driving cavity, and an electromagnetic valve is further arranged between the air source and the driving cavity and can switch the driving cavity and communicate the atmosphere/the driving cavity and the air source.

By adopting the technical scheme, the air pumping and discharging assembly can perform air pumping and charging circular operation, when charging, the electromagnetic valve enables the driving cavity to be communicated with the air source, at the moment, the air in the pumping and discharging cavity is pressed out from the pumping and discharging cavity by the air charged into the driving cavity by the air source, and the part of air enters the charging rod through the second one-way valve, so that the charging operation of the charging rod is realized; when bleeding, the solenoid valve makes drive chamber and atmosphere intercommunication, and under reset spring's effect, the drive chamber is compressed, and the volume in pumping and releasing chamber increases, passes through the air in the atmosphere behind filter and the first check valve, enters into the pumping and releasing intracavity (because the setting of second check valve, only allows the air in the atmosphere to get into), realizes bleeding the action.

The sealing performance of the detection piston between the driving cavity and the pumping and discharging cavity of the detection cylinder is ideal, so that the operation stability of the whole pumping and discharging assembly is ideal, and the leak detection accuracy is high; and because the cleanliness factor that detects the cylinder can reach the food level, can guarantee the cleanliness factor at the gas of taking out the intracavity storage.

As a further improvement of the invention, the inflation device further comprises an inflation quantity adjusting mechanism, the inflation quantity adjusting mechanism comprises an adjusting cylinder and a limit top plate, the adjusting cylinder is installed at the bottom of the detection platform, a piston rod of the adjusting cylinder penetrates through the detection platform and is fixedly connected with the bottom of the limit top plate, and the lower end of the limit top plate is abutted with the upper end of the detection piston rod to limit the stroke of the detection piston rod.

By adopting the technical scheme, the working principle of the aeration quantity adjusting mechanism is as follows: the adjusting cylinder can adjust the size of the gap between the top plate and the detection base, namely, the size of the stroke of the detection piston in the detection cylinder can be adjusted, namely, the size of the air filling amount in the closed container to be detected of the whole low-pressure leakage detection device is adjusted. The setting of above-mentioned structure can make low pressure leak hunting device can adjust the gas filling volume of adaptation according to the size of the airtight container of waiting to examine of difference, promotes whole application scope to press leak hunting device.

In conclusion, the invention has the following beneficial effects:

1. a milk powder leak detection machine comprises a leak detection device, wherein the leak detection device comprises a detection platform, a pressure transmitter, an inflation rod, a sealing piece and a filling piece, the inflation rod and the filling piece are used for inflating an inner cavity of a tank body, the pressure change of the inner cavity of the tank body is observed through the pressure transmitter, the filling piece stretches into the inner cavity of the tank body, the volume for accommodating air in the inner cavity of the tank body is reduced, when air in the tank body leaks, the air pressure change of the inner cavity of the tank body caused by the air leakage with the same volume is increased, and therefore the leak detection precision of the whole leak detection device is improved;

2. the lifting mechanism comprises a lifting base, a supporting rod and a lifting platform, the supporting rod is provided with a first clamping ring groove, an elastic clamping component matched with the first clamping ring groove is arranged in the lifting base to position the supporting rod and the lifting base, and when the lifting mechanism is in an overload state, the supporting rod and the lifting base are separated through the elastic clamping component, so that the damage probability of the supporting rod is reduced;

3. still wrap leak hunting device, leak hunting device is through arranging the filter in proper order, first check valve, second check valve, the detection end and locate the pump-bleed subassembly between first check valve and the second check valve, realized advancing to filter the air in the atmosphere and then transporting to detection end department and carrying out the purpose of leak hunting, and the setting up of above-mentioned structure makes the input gas cleanliness factor in waiting to examine the airtight container higher, has weakened the pollution that causes airtight container in the testing process.

Drawings

FIG. 1 is a schematic structural diagram of a milk powder tank leak detector of the present invention;

FIG. 2 is a schematic view of the bottom of the rotating gantry of the present invention;

FIG. 3 is a schematic view of the side wall of the rotating gantry of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a top view of the rotating gantry of the present invention;

FIG. 6 is a schematic cross-sectional view of a lead screw nut assembly according to the present invention;

FIG. 7 is a schematic structural view of the lifting mechanism of the present invention;

FIG. 8 is a schematic cross-sectional view of the lifting mechanism of the present invention;

FIG. 9 is a schematic structural view of the lifting platform of the present invention in an exploded state;

FIG. 10 is a bottom view of the top plate of the platform of the present invention;

FIG. 11 is a schematic view of a leak detection apparatus in accordance with the invention;

FIG. 12 is a schematic cross-sectional view of leak detection apparatus in accordance with the invention;

FIG. 13 is a schematic cross-sectional view of a seal of the present invention;

FIG. 14 is a cross-sectional view of a second clip member of the present invention;

FIG. 15 is a schematic view showing the construction of the inflator according to the present invention;

FIG. 16 is an enlarged view at B in FIG. 15;

FIG. 17 is a schematic sectional view of an inflator according to the present invention.

In the figure: 100. a base; 110. a central column; 200. rotating the frame; 210. rotating the platform; 211. a lifting chute; 220. a detection platform; 221. an inflation through hole; 230. a first gear; 241. adjusting the motor; 242. adjusting the lead screw; 243. a lead screw nut assembly; 243a, a fixed seat; 243a1, rotating groove; 243b, lead screw nut; 243b1, adjusting gear; 243c, swivel bearing; 243d, lock nut; 244. a tension gear; 246. a second reduction gearbox; 246a, output gear; 247. a chain; 310. a drive motor; 320. a first reduction gearbox; 330. a second gear; 400. an annular lifting slide rail; 500. a lifting mechanism; 510. a lifting base; 511. mounting a through hole; 512. a first clamping channel; 512a, a first hole; 512b, a second hole; 520. a roller; 530. a support bar; 531. a first snap ring groove; 532. mounting a stud; 540. a lifting platform; 541. a platform base; 541a, installing a counter bore; 541b, mounting a nut; 541c, a first bolt; 541d, a first mounting groove; 542. a platform top plate; 542a and a second mounting groove; 542b, a magnet groove; 542c, a magnet; 542d, a first via hole; 543. a support spring; 544. a metal cover plate; 544a, a second via; 550. a sliding trolley; 561. a first ball bearing; 562. a first clip member; 562a, an abutment post; 562b, a limiting plate; 563. a first spring; 564. an end cap; 564a, an adjusting part; 600. a leak detection device; 610. an inflation rod; 611. an inflation channel; 612. installing a socket; 613. a first three-way joint; 614. a seal ring; 615. a first nut; 616. a second nut; 617. a second clamping ring groove; 620. a seal member; 621. a rubber pad; 622. a metal plate; 623. placing holes; 630. a filling member; 631. installing blind holes; 632. filling the cavity; 633. a second clamping channel; 634. a second clip member; 634a, clamping the shell; 634b, a second spring; 634c, a second ball; 635. an air vent; 636. a first leak detection channel; 637. a second leak detection channel; 640. a pressure transmitter; 700. an inflator; 710. a filter; 720. a first check valve; 730. a second one-way valve; 740. a gas pumping and discharging assembly; 741. detecting a cylinder; 741a, a detection piston; 741a1, detecting a piston head; 741a2, detecting the piston rod; 741b, a drainage cavity; 741c, a drive lumen; 742. a connecting member; 743. a return spring; 744. an extension rod; 745. a buffer block; 746. a limiting top plate; 747. an adjusting cylinder; 750. a second three-way joint; 760. an electromagnetic valve; 810. a feeding and conveying frame; 820. a conveying screw; 830. a feed conveyor pan; 910. a discharge conveying frame; 920. and a discharge conveying disc.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 3, a milk powder tank leak detector includes a base 100 fixed on the ground, a rotating frame 200 rotatably mounted on the base 100, a driving mechanism for driving the rotating frame 200 to rotate, an annular lifting slide rail 400 mounted on the outer side of the rotating frame 200, a plurality of lifting mechanisms 500 slidably mounted on the frame and capable of sliding along the annular lifting slide rail 400, leak detection devices 600 corresponding to the lifting mechanisms 500 one by one, and an inflator 700 for supplying air to the leak detection devices 600. The base 100 is provided with a center post 110 penetrating through the entire rotating machine frame 200, and the rotating machine frame 200 can rotate circumferentially around the center post 110.

Referring to fig. 2, the driving mechanism includes a driving motor 310, a first reduction gearbox 320 coupled to an output shaft of the driving motor 310, and a second gear 330 disposed on the output shaft of the reduction gearbox.

The rotating gantry 200 includes a rotating platform 210, a sensing platform 220, and a first gear 230 fixed to the bottom of the rotating platform 210. Wherein the first gear 230 and the second gear 330 are engaged with each other to realize the driving of the rotating frame 200 by the driving mechanism. The detection platform 220 is a circular plate-shaped platform, and the rotating platform 210 is cylindrical.

Referring to fig. 3 and 5, a height adjusting mechanism is further disposed between the detecting platform 220 and the rotating platform 210 to adjust the height of the detecting platform 220. The height adjusting mechanism comprises an adjusting motor 241, an adjusting screw 242 fixed on the top of the rotating platform 210 and vertically arranged to penetrate through the detecting platform 220, and a screw nut assembly 243 rotatably installed on the detecting platform 220 and matched with the adjusting screw 242.

Referring to fig. 5 and 6, the inspection platform 220 is provided with a through hole for the adjusting screw 242 to pass through, the screw nut assembly 243 includes a fixing seat 243a, a screw nut 243b and two rotating bearings 243c, wherein the bottom of the fixing seat 243a has a rotating groove 243a1, the screw nut 243b penetrates through the fixing seat 243a to the rotating groove 243a1 from top to bottom, and the outer side of the screw nut 243b is sleeved with two rotating bearings 243c located in the rotating groove 243a1 and a locking nut 243d for pressing the rotating bearings 243c to the bottom of the rotating groove 243a 1. Wherein, an adjusting gear 243b1 is fixed on the upper end of the lead screw nut 243 b.

The top of the rotating platform 210 is uniformly provided with six adjusting screw rods 242 circumferentially around the central column 110, and the detection platform 220 is provided with six screw rod nut assemblies 243 matched with the adjusting screw rods 242. The detecting platform 220 is circumferentially and rotatably provided with a tension gear 244 at the inner side of the adjacent adjusting gear 243b1, the adjusting motor 241 is arranged at the top center of the detecting platform 220, the output end of the adjusting motor 241 is connected with a second reduction gearbox 246, and the output shaft of the second reduction gearbox 246 is provided with an output gear 246 a. Wherein, a chain 247 is arranged on the output gear 246a, the tension gear 244 and the adjusting gear 243b 1. The arrangement of the above structure enables the adjusting gear 243b1 to rotate in the same direction after the motor is started, so as to realize the regulation and control of the lifting of the whole detection platform 220.

Referring to fig. 3, 4 and 7, the lifting mechanism 500 includes a lifting base 510, a roller 520 disposed at one side of the lifting base 510, a support bar 530, and a lifting platform 540 mounted on the top of the support bar 530. Wherein, one side of the lifting base 510 is provided with a sliding trolley 550, and the side wall of the rotating platform 210 is vertically provided with a lifting chute 211 for the sliding trolley 550 to slide.

Referring to fig. 8 and 9, the lifting base 510 is L-shaped, and has a mounting through hole 511 penetrating through upper and lower end surfaces thereof for the support rod 530 to pass through, and the support rod 530 and the mounting through hole 511 are in clearance fit. One side of the lifting base 510 is provided with a first clamping channel 512 which is communicated with the installation through hole 511 and is horizontally arranged, the first clamping channel 512 sequentially comprises a first hole 512a and a second hole 512b along the direction close to the installation through hole 511, and the aperture of the first hole 512a is smaller than that of the second hole 512 b.

The lifting base 510 is provided with a resilient clamping assembly within the first clamping channel 512. The elastic clamping assembly sequentially comprises a first ball 561, a first clamping piece 562, a first spring 563 and an end cover 564 along a direction close to the installation through hole 511. The first ball 561 is disposed in the first hole 512a and abuts against the support rod 530; the first clamping piece 562 comprises an abutting column 562a positioned in the first hole 512a and a limiting plate 562b positioned in the second hole 512b, the abutting column 562a is matched with the first hole 512a, and the limiting plate 562b is attached to the inner wall of the second hole 512 b; the end cap 564 has an adjustment portion 564a threadedly coupled to an inner wall of the second bore 512 b; one end of the first spring 563 abuts on the stopper plate 562b, and the other end of the first spring 563 abuts on the adjusting portion 564 a.

The outer side wall of the portion of the support bar 530 extending into the mounting through hole 511 is provided with a first snap ring groove 531.

Referring to fig. 9, the top of the support rod 530 has a mounting stud 532, and the mounting stud 532 has an outer diameter smaller than the outer diameter of the support rod 530.

The elevating platform 540 includes a platform base 541 and a platform top plate 542 floatingly mounted on the platform base 541. The top of the platform base 541 is provided with a mounting counter bore 541a into which the mounting stud 532 is inserted, and the platform base 541 is provided with a mounting nut 541b matched with the mounting stud 532. When the mounting stud 532 of the support rod 530 is inserted into the mounting counterbore 541a, the end surface of the support rod 530 provided with the mounting stud 532 abuts against the bottom of the platform base 541, so that the support rod 530 supports the platform base 541.

At least three first bolts 541c which penetrate through the platform base 541 and are in threaded fit with the platform top plate 542 are circumferentially installed at the bottom of the platform base 541. The platform base 541 has a first counter bore for mounting the first bolt 541c, and the first bolt 541c is slidably connected to an inner wall of the first counter bore, that is, the platform top plate 542 can move up and down relative to the platform base 541. In this embodiment, the lifting platform 540 has four first bolts 541c, and the four first bolts 541c are uniformly arranged on the platform base 541 in the circumferential direction.

Referring to fig. 9 and 10, the lifting platform 540 further includes at least three supporting springs 543 between the platform base 541 and the platform top plate 542. The top circumference of platform base 541 evenly is provided with at least three first mounting grooves 541d that supply supporting spring 543 bottom installation location, and the bottom of platform roof 542 still is seted up and is supplied supporting spring 543 top installation location and with the second mounting groove 542a of first mounting groove 541d one-to-one. In the present embodiment, the lifting platform 540 is provided with four supporting springs 543, and the four supporting springs 543 are uniformly arranged on the lifting platform 540 in the circumferential direction.

The top plate 542 includes at least three magnet grooves 542b and attracting magnets 542c attached to the magnet grooves 542b in the circumferential direction. In this embodiment, two sets of magnet grooves 542b are disposed on the platform top plate 542, the inner ring has six magnet grooves 542b, the outer ring has eight magnet grooves 542b, three absorption magnets 542c are disposed at intervals in the six magnet grooves 542b of the inner ring, and four absorption magnets 542c are disposed at intervals in the four magnet grooves 542b of the outer ring.

The center of the platform top plate 542 is provided with a first through hole 542 d. Also mounted on top of the deck plate 542 is a metal cover plate 544, the metal cover plate 544 having a second through hole 544a directly opposite the first through hole 542 d.

Referring to fig. 11 and 12, the leak detection apparatus 600 includes an air-filled stem 610, a seal 620, a filler 630, and a pressure transducer 640 extending through the testing platform 220. The inspection platform 220 has an inflation through hole 221 through which the inflation rod 610 passes. The air charging rod 610 has an air charging channel 611 penetrating the upper and lower end surfaces of the air charging rod 610 and disposed coaxially with the air charging rod 610, and a mounting socket 612 is disposed at the top of the air charging rod 610.

In the filling and leak detecting apparatus 600, a first three-way joint 613 is installed at a mounting socket 612 of the air charging pole 610, a detection joint of the pressure transmitter 640 is inserted into one joint of the first three-way joint 613, and the remaining one joint of the first three-way joint 613 is an air inlet joint through which the air charging apparatus 700 (see fig. 1) charges air into the air charging pole 610. With the above arrangement, the inflator 700 is used to inflate the inlet fitting of the first three-way joint 613, so that not only can the inflation channel 611 of the inflation rod 610 be inflated, but also the pressure in the inflation channel 611 can be measured by the pressure transmitter 640.

The inflation rod 610 is provided with a fixing portion which is inserted into the inflation through hole 221 and is in sealing fit with the inflation through hole 221, two sealing grooves are formed in the circumferential direction of the outer side wall of the fixing portion, a sealing ring 614 is arranged in each of the two sealing grooves, the inner ring of the sealing ring 614 abuts against the sealing groove, the outer ring of the sealing ring 614 abuts against the inner wall of the inflation through hole 221, and therefore sealing connection between the inflation rod 610 and the inflation through hole 221 is achieved.

The upper end of the air-filled rod 610 is provided with a first nut 615 which is pressed against the top surface of the detection platform 220. The first nut 615 abuts against the top surface of the detection platform 220 to limit the air inflation rod 610, and the air inflation rod 610 is prevented from falling off from the detection platform 220.

Referring to fig. 12 and 13, the sealing member 620 includes a rubber pad 621 and a metal plate 622 disposed inside the rubber pad 621. The inflation rod 610 penetrates both the rubber pad 621 and the metal plate 622, and the inflation rod 610 is further mounted with a second nut 616 abutting against the sealing member 620. The rubber pad 621 has a placing hole 623 for placing the second nut 616, and the second nut 616 abuts against the bottom of the metal plate 622. In this embodiment, the rubber pad 621 is made of food grade rubber, and the metal plate 622 is made of stainless steel. The first nut 615 and the second nut 616 are arranged on the inflating rod 610, so that the sealing element 620 and the inflating rod 610 are installed on the detection platform 220, and through the arrangement of the structure, the sealing element 620 abuts against the bottom of the detection platform 220, and the contact sealing between the sealing element 620 and the detection platform 220 is realized.

Referring to fig. 12 and 14, the outer sidewall of the inflating rod 610 is further provided with a second snap ring groove 617 for snap fitting of the filling member 630.

The filling member 630 is cylindrical, and an annular chamfer is formed at the bottom edge of the filling member 630. The top of the filling member 630 is provided with a blind mounting hole 631 into which the inflation rod 610 is inserted, and when the inflation rod 610 is inserted into the blind mounting hole 631 of the filling member 630 and clamped, the bottom of the blind mounting hole 631 forms a filling cavity 632 communicated with the inflation channel 611.

At least two clamping channels 633 communicated with the mounting blind holes 631 and a second clamping piece 634 installed in the second clamping channel 512 in a threaded manner are circumferentially arranged on the outer side wall of the filling piece 630. The second engaging member 634 has an elastic expansion joint capable of being engaged into the second engaging ring groove 617. In this embodiment, the resilient expansion joint is a spring-ball pair. The clamping member 634 includes a clamping housing 634a, a second spring 634b and a second ball 634c, the clamping housing 634a has a clamping cavity for the second spring 634b and the second ball 634c to be mounted and a clamping opening opposite to the second clamping ring groove 617, the second ball 634c partially extends out of the clamping opening under the action of the second spring 634b and abuts against the second clamping ring groove 617, wherein the diameter of the clamping opening is smaller than the outer diameter of the ball 634 c. In this embodiment, the filling member 630 is provided with four second clamping channels 633 and four second clamping members 634 respectively disposed in the second clamping channels 633.

The filling member 630 further has an air guide hole 635 at the bottom of the installation blind hole 631. The installation blind hole 631 and the air guide hole 635 are coaxially arranged with the filling member 630. In this embodiment, the air hole 635 is a blind hole. The filler 630 is also provided with a leak detection passage communicating the inflation passage 611 with the tank inner cavity. The leak detection channels include at least two first leak detection channels 636 which are circumferentially arranged and communicated with the filling cavity 632 and are radially arranged, and at least two second leak detection channels 637 which are circumferentially arranged and communicated with the lower end of the air guide hole 635 and are radially arranged. In this embodiment, the packing 630 has four first leak-detection passages 636 and four second leak-detection passages 637.

Referring to fig. 15 and 16, leak detection apparatus 600 includes a filter 710 mounted to testing platform 220, a first one-way valve 720, a second one-way valve 730, and a vent assembly 740. The filter 710, the first check valve 720, the second check valve 730 and the inflation rod 610 are communicated at one time, the first check valve 720 and the second check valve 730 only allow the air to be communicated from the filter 710 to the detection end, and the air exhaust assembly 740 is arranged between the first check valve 720 and the second check valve 730.

A second three-way joint 750 is further disposed between the first one-way valve 720 and the second one-way valve 730, and the remaining one joint of the second three-way joint 750 is connected to the air pumping and releasing assembly 740.

The air pumping and discharging assembly 740 comprises a detection cylinder 741, an air pumping assembly and an air discharging assembly. The bottom of the detection cylinder 741 is mounted at the top of the detection base. The detection piston 741a in the detection cylinder 741 divides an inner cavity of the detection cylinder 741 into a drawing cavity 741b and a driving cavity 741c, the detection piston 741a includes a detection piston head 741a1 and a detection piston rod 741a2, and the detection piston rod 741a2 is disposed on an end surface of the detection piston head 741a1 facing the driving cavity 741c and extends out of the detection cylinder 741. Wherein, the pumping cavity 741b in the detection cylinder 741 is communicated with the remaining one of the second three-way joint 750.

Referring to fig. 15 and 17, the air bleed assembly includes an air supply (not shown) and a solenoid valve 760. Wherein, the air supply is communicated with the driving cavity 741c and can supply air to the driving cavity 741 c. The electromagnetic valve 760 is a two-position three-way electromagnetic valve 760, and can switch whether the driving chamber 741c is communicated with the air source, and when the driving chamber 741c is not communicated with the air source, the driving chamber 741c is communicated with the atmosphere. In this embodiment, the gas source is a gas cylinder.

The air-extracting component can drive the detection piston 741a to slide towards the driving cavity 741c, and includes a connecting member 742 installed on the detection piston rod 741a2 and located outside the detection cylinder 741, and a return spring 743 sleeved on the detection piston rod 741a2, wherein the upper end of the connecting member 742 has a limit ring, and the return spring 743 abuts against the housing of the detection cylinder 741 and the limit ring of the connecting member 742 at the same time.

An extension rod 744 and a buffer block 745 mounted on the top of the extension rod 744 are further provided on the top of the detection piston rod 741a2 of the detection cylinder 741.

The low pressure leak detection device 600 is further provided with an aeration amount adjusting device, which comprises the detection base, a limit top plate 746 and an adjusting cylinder 747. The lower end of the top plate 746 abuts against a cushion 745 of the detection cylinder 741 to limit the stroke of the detection piston 741 a. The adjusting cylinder 747 is installed at the bottom of the detection base, and the adjusting piston rod of the adjusting cylinder 747 directly penetrates through the detection base and is fixedly connected with the top plate 746. By adjusting the extension and retraction of the air cylinder 747, the height of the limit top plate 746 can be adjusted, that is, the stroke of the detection piston 741a in the whole detection cylinder 741 is adjusted.

Referring to attached figures 1 and 2, a feeding device is arranged on one side of the milk powder tank leakage detecting machine. The feeding device includes a feeding conveyor frame 810, a conveying screw 820, and a feeding conveyor tray 830. Wherein the milk powder cans are placed on the feeding conveyor 810 and moved toward the conveying screw 820; the conveying screw 820 can arrange the parallel milk powder cans at intervals and convey the milk powder cans to the feeding conveying tray 830, wherein the feeding device is provided with a screw motor for driving the conveying screw 820 to rotate; the feeding tray 830 is drivingly connected to the driving motor 310, and can transport the milk powder container to the lifting platform 540 (see fig. 7).

The other side of the milk powder tank leak detector is also provided with a discharging device. The discharging device comprises a discharging conveying frame 910 and a discharging conveying disc 920, the discharging conveying disc 920 can convey the milk powder cans on the lifting platform 540 to the discharging conveying frame 910, and discharging operation of the milk powder cans is achieved. In this embodiment, the infeed conveyor 810 and the outfeed conveyor 910 are the same conveyor.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a milk powder jar leak hunting machine, includes rotating frame (200), drive rotating frame (200) pivoted actuating mechanism, installs in annular lift slide rail (400) in rotating frame (200) outside, slides and install in the frame and can follow a plurality of elevating system (500) that annular lift slide rail (400) slided, with elevating system (500) one-to-one leak hunting device (600) and for aerating device (700) air feed of leak hunting device (600), rotating frame (200) are including supplying detection platform (220) of leak hunting device (600) installation, elevating system (500) have supply milk powder jar to place and with elevating platform (540) of leak hunting device (600) one-to-one, a serial communication port, leak hunting device (600) are including inflating pole (610) that run through detection platform (220), be fixed in detection platform (220) bottom and supply sealing member (620) and joint of sealed butt in the sealed butt in pole (610) of filling and stretching into milk powder jar in sealing rod (610) and the leak hunting milk powder jar The filling piece (630), the inflating rod (610) is provided with an inflating channel (611) for inflating the inflating device (700), the filling piece (630) is provided with a leakage detection channel for communicating the inflating channel (611) with the inner cavity of the milk powder tank, the upper end of the inflating rod (610) is connected with a pressure transmitter (640) in parallel, the inflating device (700) comprises a filter (710), a first one-way valve (720), a second one-way valve (730) and an air exhausting and releasing assembly (740), the air inlet of the filter (710) is communicated with the atmosphere, and the air outlet of the filter (710) is communicated with a detection end; the first check valve (720) and the second check valve (730) are sequentially connected in series between the filter (710) and the detection rod, and only allow the air to be conducted from the filter (710) to the detection rod; the air pumping and releasing assembly (740) is arranged between the first one-way valve (720) and the second one-way valve (730), and atmosphere passes through the filter (710) and is transported to the detection end.

2. The milk powder tank leak detection machine according to claim 1, characterized in that the filling member (630) is provided with a blind installation hole (631) for inserting the inflation tube in a clamping manner, at least two clamping channels communicated with the blind installation hole (631) and a clamping member installed in the clamping channels are circumferentially arranged on the outer side wall of the filling member (630), the inflation rod (610) is provided with a second clamping ring groove (617) for abutting against the clamping member, and the clamping member is provided with an elastic telescopic clamping joint capable of being clamped into the second clamping ring groove (617).

3. Leak detector for milk powder cans according to claim 2, wherein when the filling member (630) is fixed to the inflating rod (610) in a clamping manner, the bottom of the blind mounting hole (631) has a filling cavity (632) communicated with the inflating channel (611), the bottom of the blind mounting hole (631) is further opened with an air guide hole (635), and the leak detection channel comprises at least two first leak detection channels (636) which are circumferentially arranged and communicated with the filling cavity (632) and are radially arranged and at least two second leak detection channels (637) which are circumferentially arranged and communicated with the lower end of the air guide hole (635) and are radially arranged.

4. The milk powder tank leak detector according to claim 1, wherein the lifting platform (540) comprises a platform base (541) fixed on the top of the supporting rod (530), a platform top plate (542) installed on the platform base (541), and a supporting spring (543) arranged between the platform top plate (542) and the platform base (541), and at least three first bolts (541c) penetrating through the platform base (541) and in threaded fit with the platform top plate (542) are circumferentially installed at the bottom of the platform base (541).

5. Milk powder tank leak detector according to claim 4, characterized in that the middle of the platform top plate (542) is provided with a first through hole (542 d).

6. The milk powder tank leak detection machine according to claim 5, characterized in that the lifting mechanism (500) further comprises a lifting base (510) and a supporting rod (530) supporting the lifting platform (540), the lifting base (510) is provided with a mounting through hole (511) for the supporting rod (530) to be vertically inserted, the lifting base (510) is further provided with an elastic clamping assembly abutted against the first clamping ring groove (531), and the elastic clamping assembly comprises a first ball (561) partially clamped in the first clamping ring groove (531) and a first spring (563) pressing the first ball (561) into the first clamping ring groove (531).

7. The milk powder tank leak detector according to claim 6, wherein the platform top plate (542) comprises a top portion provided with at least three magnet grooves (542b) and absorption magnets (542c) respectively installed in the magnet grooves (542b) in the circumferential direction, a metal cover plate (544) is further installed on the top portion of the platform top plate (542), and the metal cover plate (544) is provided with a second through hole (544a) opposite to the first through hole (542 d).

8. The milk powder tank leakage detecting machine according to claim 1, wherein the air pumping and releasing assembly (740) comprises a detection cylinder (741) and an air source, a detection piston (741a) of the detection cylinder (741) divides an inner cavity of the detection cylinder (741) into a pumping cavity (741b) and a driving cavity (741c), the pumping cavity (741b) is connected between a first one-way valve (720) and a second one-way valve (730), a rod of the detection piston (741a) is provided with a connecting piece (742) at the outer side of the detection cylinder (741), an upper end of the connecting piece (742) is provided with a limit ring, the detection piston (741a) is provided with a return spring (743) between a housing of the detection cylinder (741) and the limit ring, the air source is communicated with the driving cavity (741c) and supplies air to the driving cavity (741c), and a solenoid valve (760) is further arranged between the air source and the driving cavity (741c), the solenoid valve (760) can switch the communication between the drive chamber (741c) and the atmosphere or between the drive chamber (741c) and the air source.

9. The milk powder tank leak detection machine according to claim 8, wherein the inflator (700) further comprises an inflation quantity adjusting mechanism, the inflation quantity adjusting mechanism comprises an adjusting cylinder (747) and a limit top plate (746), the adjusting cylinder (747) is mounted at the bottom of the detection platform (220), a piston rod of the adjusting cylinder (747) penetrates through the detection platform (220) and is fixedly connected with the bottom of the limit top plate (746), and the lower end of the limit top plate (746) abuts against the upper end of the detection piston rod (741a2) to limit the stroke of the detection piston rod (741a 2).