CN113624426A - Can negative pressure detection device - Google Patents
Can negative pressure detection device Download PDFInfo
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- CN113624426A CN113624426A CN202110887140.5A CN202110887140A CN113624426A CN 113624426 A CN113624426 A CN 113624426A CN 202110887140 A CN202110887140 A CN 202110887140A CN 113624426 A CN113624426 A CN 113624426A
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- 229910052751 metal Inorganic materials 0.000 claims description 15
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 229920006351 engineering plastic Polymers 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/36—Investigating fluid-tightness of structures by using fluid or vacuum by detecting change in dimensions of the structure being tested
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Abstract
The invention discloses a negative pressure detection device for cans, which comprises a clamping piece and an observation cover with an opening at one end, wherein a fixing ring is arranged on the inner wall of the observation cover close to the opening, an elastic ring sheet is fixed on the side surface of the fixing ring facing the opening of the observation cover, an air inlet and an air outlet which are communicated with the inside and the outside of the observation cover are formed in the observation cover, the air inlet of the observation cover is connected with one port of a valve, the air outlet of the observation cover is connected with the air inlet of a first one-way valve, the air outlet of the first one-way valve is connected with the air inlet of a negative pressure pump, the clamping piece comprises two arc-shaped plates which are arranged in opposite directions, the arc-shaped plates comprise a first end and a second end, the first ends of the two arc-shaped plates are rotatably connected, and the second ends of the two arc-shaped plates both extend to form a fixing rod; this can negative pressure detection device detects the negative pressure in the can through the inside and outside atmospheric pressure difference of change can lid, does not harm the can, reduces can detection cost, and the outer atmospheric pressure of can lid is close or is greater than atmospheric pressure in the lid, the can lid of being convenient for is opened.
Description
Technical Field
The invention relates to the technical field of food detection equipment, in particular to a negative pressure detection device for a can.
Background
The cover of the glass bottle can is mostly made of metal sheets, the cover is sunken inwards under the action of negative pressure in the bottle, when the negative pressure in the bottle of the can is destroyed and air is sucked from the outside, bacteria sucked in the air are propagated on food in the can to cause the food in the bottle to be rotten, and after the air pressure in the bottle is restored to atmospheric pressure, the cover is still sunken inwards to a certain extent due to the shaping action of the negative pressure;
in the prior art, a can vacuum gauge is usually adopted for measuring the vacuum degree of a can, and is a disc negative pressure gauge with a needle point at the lower end, the base part of the gauge is connected with a hollow tube, the outside of the part of the hollow tube connected with a body is provided with a metal protector, the lower section of the hollow tube is wrapped by a thick rubber seat, the top end of the hollow tube is provided with a sharp needle head, the rubber seat plane of the base part of the gauge is tightly attached to the surface of a can cover during measurement, downward pressurization is exerted forcibly, and the needle point in the rubber seat is punctured into the cover, so that the vacuum degree can be read;
the detection method is destructive detection, and after the negative pressure in the can is destroyed, the food in the can is easy to decay when contacting with air, and the shelf life is shortened; if the cans that have punctured the lid during the sales process affect the sales, the can inspection cost increases.
Disclosure of Invention
The invention aims to overcome the existing defects and provides a can negative pressure detection device, which detects the negative pressure in a can by changing the air pressure difference between the inside and the outside of a can cover, does not damage the can, reduces the can detection cost, facilitates the opening of the can cover because the air pressure outside the can cover is close to or greater than the air pressure in the can cover, and can effectively solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a can negative pressure detection device, covers including one end open-ended observation, it is equipped with solid fixed ring to observe the cover inner wall and be close to open-ended position, gu fixed ring moves towards it is fixed with the elastic ring piece to observe cover open-ended side, it covers and sets up its inside and outside air inlet and gas outlet of intercommunication to observe, the air inlet of observing the cover is connected with a port of valve, the gas outlet of observing the cover is connected with the air inlet of first check valve, the gas outlet of first check valve and the air inlet of negative pressure pump are connected.
Still include the holder, the holder includes the arc of two settings in opposite directions, the arc includes first end and second end, and the first end of two arcs rotates to be connected, and the second end of two arcs all extends there is the dead lever.
The observation cover covers the cover, and the elastic ring piece is in sealing fit with the side edge of the cover.
Wherein the two arc plates rotate towards the cover, and the arc inner sides of the arc plates are contacted with the outer periphery side of the cover.
As a preferable technical scheme of the invention, the linear laser generator is fixed on the inner wall of the observation cover.
Wherein, the in-line laser that the line laser generator shines passes through the lid outside near the position in center.
The invention further comprises a control switch and a battery which are positioned outside the observation cover, wherein the output end of the battery is electrically connected with the input end of the control switch, and the output end of the control switch is respectively electrically connected with the input end of the negative pressure pump and the input end of the linear laser generator.
As a preferred technical scheme of the invention, a plurality of positioning pieces are fixed on the inner side of the arc plate, and the positioning pieces are anti-skid rubber blocks or sharp convex blocks.
As a preferred technical scheme of the invention, the three-way valve further comprises a negative pressure gauge and a three-way pipe, wherein three ports of the three-way pipe are respectively connected with the air inlet of the observation cover, one port of the valve and the port of the negative pressure gauge.
As a preferable technical scheme of the invention, the side surface of one arc-shaped plate is fixedly or rotatably connected with the opening of the observation cover.
As a preferred technical scheme of the invention, the air exhaust device further comprises an air exhaust assembly, wherein the air exhaust assembly comprises a second one-way valve positioned above the cover and a nut positioned below the cover, an air inlet of the second one-way valve is connected with one end of an air receiving pipe, and the outer side of the air receiving pipe is provided with an external thread matched with the nut;
wherein, the cover is provided with an installation perforation, and the lower end of the air receiving pipe passes through the installation perforation and is connected with the nut.
As a preferable technical solution of the present invention, the air receiving pipe is sleeved with an elastic piece, and the elastic piece is located above the cover.
As a preferred technical scheme of the invention, a metal block is arranged at the air outlet of the second one-way valve, and an air guide hole communicated with the air outlet of the second one-way valve is formed in the metal block.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the negative pressure detection device for the can, on one hand, the outer side of the can cover is placed in a negative pressure environment process, the inward-concave and outward-convex states of the cover are observed, whether the negative pressure is maintained in the can or not is judged, the judgment is simple and convenient, the can is not damaged, and the detection cost is reduced; on the other hand, the air pressure outside the can cover is close to or lower than the air pressure inside the can cover, so that the influence of negative pressure adsorption on the opening of the can is reduced, and the opening of the can is facilitated; on the other hand, the secondary utilization of the can bottle and the cover is realized by installing the one-way valve communicated outwards on the cover, and the resource utilization rate is improved.
2. According to the negative pressure detection device for the can, disclosed by the invention, the in-line laser irradiated by the in-line laser generator passes through the position, close to the center, of the outer side of the cover, the eyes of a user are close to the plane where the cover is located and are located above the plane, the sight line is vertical to the laser line, and the in-line laser shows a section line in the middle of the upper side of the cover, so that the outward protruding or inward sinking state of the cover is conveniently determined
3. According to the negative pressure detection device for the can, disclosed by the invention, the arc-shaped plate is arranged below the opening of the observation cover, and the arc-shaped plate and the cover are positioned at the same height, so that the arc-shaped plate can conveniently clamp the cover of the can.
4. According to the negative pressure detection device for the can, when the bottle of the can is used for secondary use and food storage, one end, far away from the second one-way valve, of the air receiving pipe penetrates through the mounting through hole and is connected and screwed with the nut, the second one-way valve and the nut clamp the cover, the negative pressure pump works to reduce the air pressure in the observation cover, and the air in the can enters the observation cover through the second one-way valve under the action of the internal and external air pressure difference, so that the air pressure in the can is reduced, and the storage time of the food filled in the can is prolonged.
5. According to the negative pressure detection device for the can, disclosed by the invention, the state of the negative pressure in the can is judged by observing the change time required by changing the inward deformation of the can cover into the outward protrusion or observing the air pressure when the can cover is changed from the inward deformation into the outward protrusion, so that the device is simple and convenient, and the detection efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the partial cross-sectional structure of FIG. 1;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is a schematic structural view of a can vacuum test status according to the present invention;
FIG. 5 is a schematic view of the opening process of the can of the present invention;
FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;
FIG. 7 is a schematic structural diagram of another embodiment of the present invention;
FIG. 8 is an enlarged view of the structure at B in FIG. 7;
fig. 9 is a schematic view of a second check valve and metal block structure according to the present invention.
In the figure: the device comprises a valve 1, a negative pressure meter 2, a control switch 3, a battery 4, a negative pressure pump 5, a first one-way valve 6, an observation cover 7, an arc-shaped plate 8, a positioning piece 9, a fixing rod 10, a linear laser generator 11, a fixing ring 12, an elastic ring piece 13, a second one-way valve 14, an elastic piece 15, a nut 16 and a metal block 17.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described below with reference to the accompanying drawings and examples.
The first embodiment is as follows: referring to fig. 1-6, the present embodiment discloses a can negative pressure detection device, which includes an observation cover 7 with an opening at one end, a fixing ring 12 is disposed on the inner wall of the observation cover 7 near the opening, an elastic ring sheet 13 is fixed on the side of the fixing ring 12 facing the opening of the observation cover 7, an air inlet and an air outlet communicated with the inside and the outside of the observation cover 7 are disposed on the observation cover 7, the air inlet of the observation cover 7 is connected with a port of the valve 1, the air outlet of the observation cover 7 is connected with the air inlet of the first check valve 6, and the air outlet of the first check valve 6 is connected with the air inlet of the negative pressure pump 5.
This embodiment still includes the holder, and the holder includes two arc 8 that set up in opposite directions, and arc 8 includes the first end and the second end of plate body, and the first end of two arc 8 is rotated and is connected, and the second end of two arc 8 all extends there is dead lever 10.
The embodiment also comprises a can and a cover which is hermetically arranged at the opening of the can, wherein the observation cover 7 covers the cover, and the elastic ring piece 13 is hermetically attached to the side edge of the cover;
wherein, the two arc plates 8 rotate towards the cover, and the arc inner sides of the arc plates 8 contact with the outer periphery side of the cover.
Further, the arc inboard of arc 8 is fixed with a plurality of setting element 9, setting element 9 is anti-skidding rubber piece or spine lug, two arc 8 are detained when the periphery side of lid, dead lever 10 contactless is in the same place, the user grips two dead levers 10 and gives two dead lever 10 pressure in opposite directions, then rotate around the lid, dead lever 10 has increased moment, setting element 9 increases the inboard and the lid periphery side friction between arc 8, avoid arc 8 and lid periphery side to take place the relative slip.
Preferably, the negative pressure pump 5 is connected to an external power outlet through a cable with a socket to supply power to the negative pressure pump 5.
The observation cover 7 is made of transparent glass or transparent engineering plastic; or the observation cover 7 is replaced by a metal cover, the metal cover is provided with an installation through hole communicated with the inside and the outside of the metal cover, and the installation through hole is hermetically provided with a transparent observation window.
Rotational connections include, but are not limited to, pin rotational connections, hinge base rotational connections.
The elastic ring piece 13 is a soft rubber ring piece or a soft silica gel ring piece.
The first one-way valve 6 makes the air in the observation cover 7 only flow out in one way from the negative pressure pump 5, so as to maintain the negative pressure in the observation cover 7.
The working process and principle of the embodiment are as follows:
when detecting the negative pressure state of the can, the valve 1 is closed, the observation cover 7 covers the cover, the elastic ring piece 13 is in sealing fit with the side edge of the upper side of the cover, the negative pressure pump 5 is connected with an external power socket through a cable with a socket, and the negative pressure pump 5 works to reduce the air pressure of the inner wall of the observation cover 7.
A detection method comprises the following steps: when the negative pressure in the can is destroyed, the cover is changed from the inward concave state to the outward convex state because the air pressure outside the cover of the can is lower than the air pressure in the cover within a period of time when the negative pressure pump 5 just starts to work, which indicates that the air enters the can and the negative pressure in the can is destroyed;
when the negative pressure in the can is not destroyed, after the negative pressure pump 5 works for a period of time, the air pressure outside the cover is gradually reduced to be close to the air pressure in the cover, then the air pressure outside the cover is gradually lower than the air pressure in the cover, and the cover of the can is changed from an inward concave state to an outward convex state;
whether the negative pressure in the can is broken or not is determined according to the change time required for the cover of the can to change from the inward shape to the outward shape.
The other detection method comprises the following steps: the cover of a plurality of cans is opened, then the covers are covered and sealed, the device is arranged on the covers of the cans, the change time required by the cover to be converted from the inward convex state to the outward convex state after the negative pressure pump 5 works is recorded, and the measured time is the reference time; when the negative pressure detection device for the can detects other cans, the change time required by the cover to change from the inward concave state to the outward convex state is shorter than the reference time, which indicates that the negative pressure in the can is damaged, and the change time required by the cover to change from the inward concave state to the outward convex state is longer than the reference time, which indicates that the negative pressure in the can is not damaged; the reference time may be provided by the can manufacturer, the can vendor, or the user.
When the lid of can evagination, it indicates that the atmospheric pressure in the lid is less than the atmospheric pressure outside the lid, and the negative pressure that the lid received diminishes, rotates arc 8 and makes two 8 centre gripping of arc at the periphery side of lid, and user's hand is held and is held two dead levers 10, and two dead levers 10 contactless, makes two arcs 8 press from both sides tight lid, and the bottle of fixed can then rotates arc 8 through dead lever 10, and arc 8 drives the lid and rotates for the bottle, makes the lid of can open conveniently.
After the detection is finished, the valve 1 is changed from a closed state to an open state, and the valve 1 enables external air to enter the observation cover 7 and recovers the air pressure in the observation cover 7, so that the observation cover 7 and the cover are separated conveniently.
Furthermore, water is applied to the elastic ring piece 13 or the lid of the can to enhance the sealing property when the elastic ring piece 13 contacts with the side edge of the upper side of the lid.
Example two: as shown in fig. 2 and 3, the present embodiment discloses a can negative pressure detection device, which has a structure substantially the same as that of the first embodiment, except that a linear laser generator 11 is fixed on the inner wall of the observation cover 7;
wherein, the in-line laser irradiated by the in-line laser generator 11 passes through the outer side of the cover near the center.
The device also comprises a control switch 3 and a battery 4 which are positioned outside the observation cover 7, wherein the output end of the battery 4 is electrically connected with the input end of the control switch 3, and the output end of the control switch 3 is respectively electrically connected with the input end of the negative pressure pump 5 and the input end of the linear laser generator 11.
Preferably, the control switch 3 is provided with control buttons for respectively controlling the negative pressure pump 5 and the linear laser generator 11; the battery 4 is a rechargeable lithium battery or a dry battery.
The control switch 3, the battery 4, the negative pressure pump 5, the linear laser generator 11 and the like used in the present invention are all common electronic components in the prior art, and the working mode and the circuit structure thereof are all known technologies, and are not described herein again.
The working process and principle of the embodiment are as follows:
the linear laser generator 11 is controlled to work through the control switch 3, linear laser irradiated by the linear laser generator 11 passes through the position, close to the center, of the outer side of the cover, then the control switch 3 controls the negative pressure pump 5 to work, and the negative pressure pump 5 enables the air pressure in the observation cover 7 to be reduced; when a user observes, the eyes of the user are close to the plane where the cover is located and located above the plane, the sight line is perpendicular to the laser line, the line, located at the center of the cover, of the laser line protrudes downwards to prove that the cover is in the sunken state, the line, located at the center of the cover, of the laser line protrudes outwards to prove that the cover is in the convex state, and the laser line is convenient for determining the convex or sunken state of the cover.
The eyes of a user are close to the plane where the cover is located and located above the plane, the sight line is perpendicular to the laser line, and the linear laser shows a section line in the middle of the upper side of the cover, so that the outward protruding or inward sinking state of the cover is determined conveniently.
The battery 4 is adopted to supply power for the negative pressure pump 5, and the can negative pressure detection device is wide in application range and is not influenced by the position of a power socket.
Example three: as shown in fig. 1 and 2, the present embodiment discloses a can negative pressure detection device, which, on the basis of the first embodiment or the second embodiment, further includes a negative pressure meter 2 and a three-way pipe, wherein three ports of the three-way pipe are respectively connected with an air inlet of an observation cover 7, one port of a valve 1, and a port of the negative pressure meter 2.
The valve 1 comprises two ports, the two ports are in a communication state when the valve 1 is in an opening state, and the two ports are in a closed state when the valve 1 is in a closing state.
The working process and principle of the embodiment are as follows:
the air pressure in cans of the same specification is similar, and the air pressure in one of the cans is measured.
The can negative pressure detection device is arranged on the cover of a can, the negative pressure pump 5 works to reduce the air pressure in the observation cover 7, the air pressure in the observation cover 7 is monitored through the negative pressure meter 2, when the air pressure in the observation cover 7 is close to the air pressure when the can is normal, the cover of the can is observed not to protrude outwards, and the fact that air does not enter the can is proved;
when the can lid is observed protruding outward, the can is proved to enter air, and the can is proved to have the risk of deterioration.
In the prior art, the air pressure in the can is 57-98 KPa mostly.
Example four: as shown in fig. 5 and 6, the present embodiment discloses a negative pressure detecting device for cans, which has a structure substantially the same as that of the first embodiment, except that the side of one of the arc-shaped plates 8 is fixedly or rotatably connected to the opening of the observation cover 7, and the rotatable connection includes, but is not limited to, a pin shaft rotatable connection and a hinge seat rotatable connection; arc 8 is installed in observing 7 open-ended belows of cover, and arc 8 and lid are located same height, and the arc 8 of being convenient for carries out the centre gripping to the lid of can.
Example five: as shown in fig. 7, 8 and 9, the present embodiment discloses a can negative pressure detection apparatus, which has a structure substantially the same as that of the first embodiment, except that the present embodiment further includes an air extracting assembly, the air extracting assembly includes a second one-way valve 14 located above the cover and a nut 16 located below the cover, an air inlet of the second one-way valve 14 is connected with one end of an air receiving pipe, and an external thread adapted to the nut 16 is arranged on an outer side of the air receiving pipe.
Wherein, the cover is provided with an installation perforation, and the lower end of the air receiving pipe passes through the installation perforation and is connected with the nut 16.
When the food in the can is eaten and the can is reused for storing the food for a long time, the can and the cap are cleaned and sterilized, and then the heated food is added into the can.
The cover is provided with an installation through hole for the air receiving pipe to pass through, one end of the air receiving pipe, far away from the second one-way valve 14, penetrates through the installation through hole and is connected with the nut 16, the nut 16 is screwed to enable the second one-way valve 14 and the nut 16 to clamp the cover tightly, then the observation cover 7 covers the cover, the negative pressure pump 5 works to reduce the air pressure in the observation cover 7, air in the can enters the observation cover 7 through the second one-way valve 14 under the action of the difference of the internal and external air pressures, the air pressure in the can is reduced, and the preservation time of food filled in the can is prolonged.
The canned negative pressure detection device can be used for opening when the canned can needs to be opened.
Furthermore, the air receiving pipe is sleeved with an elastic sheet 15, the elastic sheet 15 is located above the cover, and the elastic sheet 15 enhances the sealing performance between the second one-way valve 14 and the cover to maintain the negative pressure state in the can.
Further, a metal block 17 is mounted at the air outlet of the second one-way valve 14, and an air guide hole communicated with the air outlet of the second one-way valve 14 is formed in the metal block 17; the high-temperature air flowing out of the second one-way valve 14 contacts the inner wall of the air guide hole of the metal block 17 to realize cooling, the high-temperature air is prevented from entering the negative pressure pump 5 to influence the performance of the rubber sealing part inside the negative pressure pump 5, the metal block 17 can condense the moisture in the high-temperature air, and the moisture in the high-temperature air is prevented from condensing in the negative pressure pump 5 to influence the performance of the negative pressure pump 5.
The parts which are not disclosed in the invention are all the prior art, and the specific structure, the materials and the working principle are not detailed; the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, simplifications, which do not depart from the principle of the present invention, should be equivalent substitutions for those of ordinary skill in the art, which should be covered by the scope of the claims and the specification of the present invention.
Claims (10)
1. The utility model provides a can negative pressure detection device which characterized in that: the device comprises an observation cover (7) with an opening at one end, wherein a fixing ring (12) is arranged at a position, close to the opening, of the inner wall of the observation cover (7), the observation cover (7) is provided with an air inlet and an air outlet which are communicated with the inside and the outside of the observation cover, the air inlet of the observation cover (7) is connected with one port of a valve (1), the air outlet of the observation cover (7) is connected with the air inlet of a first one-way valve (6), and the air outlet of the first one-way valve (6) is connected with the air inlet of a negative pressure pump (5);
still include the holder, the holder includes two arc (8) that set up in opposite directions, arc (8) include first end (801) and second end (802), and first end (801) of two arc (8) rotate the connection.
2. A can negative pressure detecting apparatus according to claim 1, wherein: the observation cover (7) covers the cover, the elastic ring piece (13) is in sealing fit with the side edge of the cover, and the second ends (802) of the two arc-shaped plates (8) extend to form fixing rods (10);
wherein the two arc plates (8) rotate towards the cover, and the arc inner sides of the arc plates (8) are contacted with the outer periphery side of the cover.
3. A can negative pressure detecting apparatus according to claim 1, wherein: the fixing ring (12) faces to the side face of the opening of the observation cover (7) and is fixed with an elastic ring piece (13).
4. A can negative pressure detecting apparatus according to any one of claims 1 to 3, wherein: a linear laser generator (11) is fixed on the inner wall of the observation cover (7);
wherein, the in-line laser irradiated by the in-line laser generator (11) passes through the position close to the center of the outer side of the cover.
5. A can negative pressure detecting apparatus according to claim 4, wherein: still including being located observation cover (7) outer control switch (3) and battery (4), the output of battery (4) and the input electricity of control switch (3) are connected, the output of control switch (3) is connected with the input of negative pressure pump (5) and the input electricity of word laser generator (11) respectively.
6. A can negative pressure detecting apparatus according to claim 1, wherein: a plurality of positioning pieces (9) are fixed on the inner sides of the arcs of the arc-shaped plates (8), and the positioning pieces (9) are anti-skidding rubber blocks or sharp-pricked convex blocks.
7. A can negative pressure detecting apparatus according to claim 1, wherein: the three ports of the three-way pipe are respectively connected with the air inlet of the observation cover (7), one port of the valve (1) and the port of the negative pressure meter (2).
8. A can negative pressure detecting apparatus according to any one of claims 1 to 7, wherein: the air exhaust assembly comprises a second one-way valve (14) positioned above the cover and a nut (16) positioned below the cover, an air inlet of the second one-way valve (14) is connected with one end of an air receiving pipe, and an external thread matched with the nut (16) is arranged on the outer side of the air receiving pipe;
wherein, the cover is provided with an installation perforation, and the lower end of the air receiving pipe passes through the installation perforation and is connected with a nut (16).
9. A can negative pressure detecting apparatus according to claim 8, wherein: the air receiving pipe is sleeved with an elastic sheet (15), and the elastic sheet (15) is located above the cover.
10. A can negative pressure detecting apparatus according to claim 8, wherein: and a metal block (17) is arranged at the air outlet of the second one-way valve (14), and an air guide hole communicated with the air outlet of the second one-way valve (14) is formed in the metal block (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110887140.5A CN113624426A (en) | 2021-08-03 | 2021-08-03 | Can negative pressure detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110887140.5A CN113624426A (en) | 2021-08-03 | 2021-08-03 | Can negative pressure detection device |
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| CN113624426A true CN113624426A (en) | 2021-11-09 |
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| CN202110887140.5A Pending CN113624426A (en) | 2021-08-03 | 2021-08-03 | Can negative pressure detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147438A (en) * | 2023-10-31 | 2023-12-01 | 常州裕能石英科技有限公司 | Quartz crucible port detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2103804U (en) * | 1991-02-08 | 1992-05-06 | 谭启惠 | Harmless detector for can vacuum degree |
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| CN202936179U (en) * | 2012-11-19 | 2013-05-15 | 吴雪琪 | Can bottle opener |
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| CN211553231U (en) * | 2019-12-25 | 2020-09-22 | 吉林省农嫂食品有限公司 | A quality control device for can goods production |
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| CN201980956U (en) * | 2011-01-11 | 2011-09-21 | 娄营利 | Fruit can opener |
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| CN104944335A (en) * | 2014-03-25 | 2015-09-30 | 吴春兰 | Can opener |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117147438A (en) * | 2023-10-31 | 2023-12-01 | 常州裕能石英科技有限公司 | Quartz crucible port detection device |
| CN117147438B (en) * | 2023-10-31 | 2023-12-29 | 常州裕能石英科技有限公司 | Quartz crucible port detection device |
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