CN113310644B - Canned food gas tightness detection device - Google Patents
Canned food gas tightness detection device Download PDFInfo
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- CN113310644B CN113310644B CN202110865443.7A CN202110865443A CN113310644B CN 113310644 B CN113310644 B CN 113310644B CN 202110865443 A CN202110865443 A CN 202110865443A CN 113310644 B CN113310644 B CN 113310644B
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- cover cap
- positioning seat
- tank body
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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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to the technical field of air tightness detection. The canned food airtightness detection device comprises a positioning seat, wherein a positioning groove for accommodating a tank body is formed in the positioning seat, a sealing cover cap is arranged above the positioning groove and is movably connected with the positioning seat along the vertical direction, the sealing cover cap comprises an annular side wall and a circular top wall, a sealing device is arranged on the inner wall of the annular side wall, the sealing cover cap is assembled to form an airtight test cavity together with the top wall and part of the side wall of the tank body in the positioning groove when the sealing cover cap moves downwards relative to the positioning seat, the sealing cover cap can be separated from the tank body when the sealing cover cap moves upwards relative to the positioning seat, and an inflation pipeline and an air pressure detection unit are arranged on the sealing cover cap. The sealing cover cap only seals the sealing area at the upper end of the tank body, and the sealing area of the tank body is detected in a targeted manner, so that the inflation volume is reduced, the inflation time is shortened, and the air tightness detection efficiency of canned food is improved.
Description
Technical Field
The invention belongs to the technical field of air tightness detection. In particular to a canned food airtightness detection device.
Background
Canned food is a packing mode that can effectively prolong the food shelf life, need carry out the gas tightness in the canned food packaging process to jar body and the canned food after the packing and detect, wherein the gas tightness of jar body detects and goes on before the packing, mainly detects whether there are defects such as gap, gas pocket that processing defect leads to in the production and processing process of jar body, and canned food after the packing mainly detects sealing the region, avoids sealing the gas leakage phenomenon that thoroughly leads to. In the prior art, the air tightness detection of canned food is almost the same as the air tightness detection of a tank body, the whole tank body is placed in a closed space, then the closed space is pressurized, the air pressure change condition is observed after the pressure is maintained for a period of time, if the air pressure is obviously reduced, high-pressure gas overflows into the tank body, the air tightness of the tank body is poor, otherwise, if the reduction range of the air pressure is within an acceptable range, the sealing of the tank body is good (because the detection device cannot realize absolute sealing, a small amount of pressure loss is normal). The defect of the detection mode is that the space for accommodating the whole tank body is relatively large, so that the inflation time is long, and the production and detection efficiency is influenced.
Disclosure of Invention
The invention aims to provide a canned food airtightness detection device, which can realize local detection at a sealing position, reduce the inflation time and improve the detection efficiency.
The technical scheme adopted by the invention is as follows:
the utility model provides a canned food gas tightness detection device, includes the positioning seat, is equipped with the constant head tank that is used for the holding jar body on the positioning seat, and the constant head tank top is equipped with sealed shroud, and sealed shroud follows vertical direction and positioning seat swing joint, and sealed shroud includes annular lateral wall and circular roof, is equipped with sealing device on the inner wall of annular lateral wall, and sealed shroud is assembled as it can enclose into an inclosed test chamber jointly with the roof and the partial lateral wall of the jar body in the constant head tank for the positioning seat is down, and can with the jar body breaks away from when sealed shroud moves upward for the positioning seat, be equipped with gas charging line and atmospheric pressure detecting element on the sealed shroud.
Sealing device includes along vertical direction and the lateral wall swing joint's of sealed shroud annular piston, and annular piston slides and sets up in the piston chamber that sets up in sealed shroud lateral wall, and the rigid coupling has a clamping ring on the annular piston, and the inboard of sealed shroud lateral wall is equipped with the step portion relative with the clamping ring, is equipped with the elastic sealing circle between step portion and the clamping ring, can extrude when the clamping ring is drawn close to step portion elastic sealing circle makes elastic sealing circle expand in order to support tightly to the lateral wall of the jar body, the piston chamber cavity and the gas tube way intercommunication of annular piston wherein one side, can drive the clamping ring when this side piston chamber is aerifyd and draw close to step portion, is equipped with the elasticity reset unit that is used for driving the clamping ring to keep away from the direction motion of step portion in the piston chamber cavity and the atmosphere intercommunication and this side cavity of opposite side.
The air charging pipeline comprises a main air inlet pipe, a first air inlet branch pipe and a second air inlet branch pipe, the main air inlet pipe is communicated with an air charging connector arranged outside the sealing cover cap, one ends of the first air inlet branch pipe and the second air inlet branch pipe are communicated with the main air inlet pipe, the other end of the first air inlet branch pipe is communicated with the testing cavity, and the other end of the second air inlet branch pipe is communicated with the piston cavity; all be equipped with the check valve on first air inlet branch pipe and the second air inlet branch pipe, still be equipped with the pilot valve on the first air inlet branch pipe, the pilot valve is assembled for the normality under for the closure state and can make the pilot valve switch on after the clamping ring draws close one section stroke to step portion.
The pilot valve includes columniform case, and the case slides along vertical direction and sets up in sealed shroud, and the case is located the route of first branch pipe of admitting air, the case pass through the valve rod with annular piston rigid coupling is equipped with the annular on the case, and the annular staggers each other with first branch pipe of admitting air under the normality, and first branch pipe of admitting air is in the off-state this moment, and draws close annular and first branch pipe intercommunication of admitting air after one section stroke to step portion as the clamping ring, and first branch pipe of admitting air is in the on-state this moment.
Still be equipped with the relief valve on the sealed bonnet, the relief valve includes the valve pocket with the atmosphere intercommunication to and slide along vertical direction and set up the valve column in the valve pocket, set up first blast pipe and second blast pipe in the sealed bonnet, first blast pipe intercommunication valve pocket and test chamber, second blast pipe intercommunication valve pocket and piston cavity, be equipped with two variable-diameter portions that the diameter is less than the valve column diameter on the valve column, be equipped with elastic element between valve column and the sealed bonnet, the valve column is under the normality under elastic element's effect with first blast pipe and second blast pipe and atmosphere disconnection, can make first blast pipe and second blast pipe communicate with the atmosphere through two variable-diameter portions respectively when the valve column receives external force to act on down.
The positioning seat is disc-shaped, the positioning grooves are U-shaped grooves formed in the edge of the positioning seat, the positioning grooves are arranged at intervals along the circumferential direction of the positioning seat, and the positioning seat is arranged on the rack in an intermittent rotating mode; the sealing cover cap is connected with the positioning seat in a sliding mode through the guide rod, the guide wheel is arranged at the lower end of the guide rod, the annular cam groove fixedly connected with the rack is arranged below the positioning seat, the cam groove is provided with a vertically-fluctuating path structure, and the guide wheel and the cam groove form rolling fit and are used for driving the sealing cover cap to move up and down in the rotation process of the positioning seat.
A feeding station, a pressurizing station, a pressure releasing station, a first discharging station and a second discharging station are sequentially arranged on the edge of the positioning seat along the circumferential direction; the feeding station is provided with a feeding mechanism for feeding the tank body into the positioning groove; the pressurizing station is provided with a high-pressure air gun movably arranged along the vertical direction, and an air outlet of the high-pressure air gun is opposite to an air inflation connector of the main air inlet pipe along the vertical direction; the pressure relief station is provided with a vertical compression bar driven by an air cylinder or an electric cylinder, and the vertical compression bar is arranged opposite to a valve post of the pressure relief valve; the first discharging station is provided with an intercepting device, the intercepting device is electrically connected with the controller, the air pressure detecting unit sends detected air pressure to the controller, the controller controls the intercepting device to take the tank body out of the first discharging station when the controller identifies that the tank body is air-leaked, the intercepting device does not respond when the air pressure detecting unit detects that the tank body is air-leaked, the tank body continuously rotates to the second discharging station at the moment, and the second discharging station is provided with a discharging mechanism used for guiding the tank body out of the positioning groove.
The intercepting device comprises a movable baffle which is pivoted with the rack along a vertical axis, a cylinder used for driving the movable baffle to swing is arranged on the rack, a first discharging station is provided with a first discharging conveying belt, when the air pressure detection unit detects air leakage of the tank body, the cylinder drives the movable baffle to swing to a tank body rotating path, and the tank body is guided to the first discharging conveying belt gradually by the movable baffle in the positioning seat rotating process.
The discharging mechanism comprises a fixed baffle fixedly connected with the rack, the fixed baffle is positioned on a rotation path of the tank body, a second discharging conveying belt is arranged at a second discharging station, and the tank body is gradually guided onto the second discharging conveying belt by the fixed baffle in the rotation process of the positioning seat.
The air pressure detection unit is a wireless air pressure sensor.
The invention has the technical effects that:
the sealing cover cap only seals the sealing area at the upper end of the tank body, and the sealing area of the tank body is detected in a targeted manner, so that the inflation volume is reduced, the inflation time is reduced, and the air tightness detection efficiency of canned food is improved;
the self-sealing mechanism provided by the invention can realize the sealing between the sealing cover and the tank body by using high-pressure gas used in testing, the deformation quantity of the elastic sealing ring is determined by the outer diameter of the tank body, and the self-sealing mechanism can adapt to a certain size error of the tank body, is a floating sealing technology, and compared with the traditional mechanical sealing, the sealing device provided by the invention is not easy to leak gas caused by abrasion;
the pilot valve provided by the invention can disconnect the gas path of the test cavity in the unclosed state of the elastic sealing ring, and the gas source supplies gas to the piston cavity in a centralized manner, and after the elastic sealing ring is closed, the pilot valve can be driven to be automatically opened, and then the gas is supplied to the test cavity, so that the inflation efficiency can be further improved, and unnecessary gas source consumption can be avoided;
according to the invention, the positioning seat is set to be of a rotary structure, so that the assembly line operation of air tightness detection is realized, and the detection efficiency is further improved.
Drawings
Fig. 1 is a perspective view of an airtightness detection apparatus provided in an embodiment of the present invention;
fig. 2 is a plan view of a airtightness detection apparatus according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged partial view of I of FIG. 3;
fig. 5 is a schematic view of an assembly structure of the sealing cover and the positioning seat according to the embodiment of the present invention;
FIG. 6 is a perspective view of a sealing cover provided by an embodiment of the present invention;
fig. 7 is a perspective view of another perspective of a sealing cap provided by an embodiment of the present invention.
The invention discloses a method for fixing a plurality of parts, which is characterized in that a part of brackets or connecting pieces for fixing each part are hidden in the attached drawings of the invention, the brackets or connecting pieces are not the key points of the invention, the key structural features of the invention can be clearly shown after the brackets or connecting pieces are hidden, the brackets or connecting pieces can be reasonably arranged by technicians through general experience according to the connection relationship of each part expressed in the invention, and the implementation of the invention is not influenced.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed.
As shown in fig. 1, 2 and 3, the canned food airtightness detection device comprises a positioning seat 20, a positioning groove 21 for accommodating a can body 1 is arranged on the positioning seat 20, a sealing cover 30 is arranged above the positioning groove 21, the sealing cover 30 is movably connected with the positioning seat 20 along the vertical direction, the sealing cover 30 comprises an annular side wall and a circular top wall, a sealing device is arranged on the inner wall of the annular side wall, the sealing cover 30 is assembled to form a closed test cavity together with the top wall and part of the side wall of the can body 1 in the positioning groove 21 when moving downwards relative to the positioning seat 20, and can be separated from the can body 1 when moving upwards relative to the positioning seat 20, and an inflation pipeline and an air pressure detection unit 39 are arranged on the sealing cover 30. The sealing cover 30 only seals the sealing area at the upper end of the tank body 1, and the sealing area of the tank body 1 is detected in a targeted manner, so that the inflation volume is reduced, the inflation time is shortened, and the air tightness detection efficiency of canned food is improved.
Preferably, as shown in fig. 4 and 6, the sealing device comprises an annular piston 31 movably connected with the side wall of the sealing cover cap 30 along the vertical direction, the annular piston 31 is slidably arranged in a piston cavity arranged in the side wall of the sealing cover cap 30, a press ring 32 is fixedly connected on the annular piston 31, a step part 34 opposite to the press ring 32 is arranged on the inner side of the side wall of the sealing cover cap 30, an elastic sealing ring 33 is arranged between the step part 34 and the press ring 32, when the press ring 32 is close to the step part 34, the elastic sealing ring 33 can be extruded and the elastic sealing ring 33 is expanded towards the inner side of the side wall of the sealing cover cap 30 to tightly support the side wall of the tank body 1, the piston cavity chamber at one side of the annular piston 31 is communicated with the inflation pipeline, when the side piston cavity chamber is inflated, the pressing ring 32 can be driven to approach the step part 34, the piston cavity chamber on the other side is communicated with the atmosphere, and an elastic resetting unit 37 used for driving the pressing ring 32 to move in the direction away from the step part 34 is arranged in the side cavity chamber. The self-sealing mechanism provided by the invention can realize the sealing between the sealing cover cap 30 and the tank body 1 by using high-pressure gas used in a test, the deformation quantity of the elastic sealing ring 33 is determined by the outer diameter of the tank body 1, and the self-sealing mechanism can adapt to a certain size error of the tank body 1, is a floating sealing technology, and compared with the traditional mechanical sealing, the sealing device provided by the invention is not easy to generate the air leakage problem caused by abrasion.
Further, as shown in fig. 4, the inflation pipeline includes a main air inlet pipe 35, a first air inlet branch pipe 351 and a second air inlet branch pipe 352, the main air inlet pipe 35 is communicated with an inflation interface 353 arranged outside the sealing cover 30, one end of the first air inlet branch pipe 351 and one end of the second air inlet branch pipe 352 are communicated with the main air inlet pipe 35, the other end of the first air inlet branch pipe 351 is communicated with the test chamber, and the other end of the second air inlet branch pipe 352 is communicated with the piston chamber; the first air inlet branch pipe 351 and the second air inlet branch pipe 352 are both provided with one-way valves, the first air inlet branch pipe 351 is also provided with a pilot valve, the pilot valve is assembled to be in a closed state under a normal state, and the pilot valve can be conducted after the pressure ring 32 is closed to the step part 34 by a certain stroke. Specifically, the pilot valve includes a cylindrical valve core 36, the valve core 36 is slidably disposed in the sealing cover 30 along a vertical direction, the valve core 36 is located on a path of the first air inlet branch pipe 351, the valve core 36 is fixedly connected to the annular piston 31 through a valve rod, a ring groove 361 is disposed on the valve core 36, the ring groove 361 and the first air inlet branch pipe 351 are staggered in a normal state, the first air inlet branch pipe 351 is in a disconnected state at the moment, the ring groove 361 is communicated with the first air inlet branch pipe 351 after the pressure ring 32 draws close to the step portion 34 for a certain stroke, and the first air inlet branch pipe 351 is in a communicated state at the moment. The pilot valve provided by the invention can disconnect the gas path of the test cavity under the state that the elastic sealing ring 33 is not closed, the gas source supplies gas to the piston cavity in a centralized manner, the pilot valve can be driven to be automatically opened after the elastic sealing ring 33 is closed, and then the gas is supplied to the test cavity, so that the inflation efficiency can be further improved, and unnecessary gas source consumption can be avoided.
Further, as shown in fig. 4 and 7, the sealing cover 30 is further provided with a pressure release valve, the pressure release valve includes a valve cavity communicated with the atmosphere and a valve post 38 slidably disposed in the valve cavity along a vertical direction, the sealing cover 30 is internally provided with a first exhaust pipe 303 and a second exhaust pipe 304, the first exhaust pipe 303 is communicated with the valve cavity and the test cavity, the second exhaust pipe 304 is communicated with the valve cavity and the piston cavity, the valve post 38 is provided with two diameter-changing portions having a diameter smaller than that of the valve post 38, an elastic element 381 is disposed between the valve post 38 and the sealing cover 30, the valve post 38 disconnects the first exhaust pipe 303 and the second exhaust pipe 304 from the atmosphere under the action of the elastic element 381 in a normal state, and when the valve post 38 moves downward under the action of an external force, the first exhaust pipe 303 and the second exhaust pipe 304 can be communicated with the atmosphere through the two diameter-changing portions respectively. In order to ensure that the test cavity has good sealing performance, the air inlet end is provided with the one-way valve, so that the other end of the sealing cover 30 is correspondingly provided with the independent pressure relief device, the pressure relief device is realized by one valve post 38, the structure is simple, the operation is convenient, and when pressure relief is needed, only the valve post 38 needs to be pressed by external force.
Preferably, as shown in fig. 5, the positioning seat 20 is disc-shaped, the positioning grooves 21 are U-shaped grooves formed in the edge of the positioning seat 20, a plurality of positioning grooves 21 are circumferentially arranged along the positioning seat 20 at intervals, the positioning seat 20 is rotatably arranged on the rack 10, a servo motor for driving the positioning seat 20 to rotate is arranged on the rack 10, and the servo motor drives the positioning seat 20 to intermittently rotate; the sealing cover cap 30 is connected with the positioning seat 20 through a guide rod 301 in a sliding manner, a guide wheel 302 is arranged at the lower end of the guide rod 301, an annular cam groove 11 fixedly connected with the rack 10 is arranged below the positioning seat 20, the cam groove 11 has an up-and-down fluctuating path structure, and the guide wheel 302 and the cam groove 11 form a rolling fit for driving the sealing cover cap 30 to move up and down in the rotation process of the positioning seat 20. According to the invention, the positioning seat 20 is set to be of a rotary structure, so that the assembly line operation of air tightness detection is realized, and the detection efficiency is further improved.
Further 1 and 2, a feeding station, a pressurizing station, a pressure releasing station, a first discharging station and a second discharging station are sequentially arranged on the edge of the positioning seat 20 along the circumferential direction; the feeding station is provided with a feeding mechanism 40 for feeding the tank body 1 into the positioning groove 21; the pressurizing station is provided with a high-pressure air gun 50 movably arranged along the vertical direction, and an air outlet of the high-pressure air gun 50 is opposite to the air inflation interface 353 of the main air inlet pipe 35 along the vertical direction; the pressure relief station is provided with a vertical compression bar 60 driven by an air cylinder or an electric cylinder, and the vertical compression bar 60 is arranged opposite to the valve column 38 of the pressure relief valve; the first discharging station is provided with an intercepting device 70, the intercepting device 70 is electrically connected with the controller, the air pressure detecting unit 39 sends the detected air pressure to the controller, the controller controls the intercepting device 70 to take the tank body 1 out of the first discharging station when the controller identifies that the tank body 1 leaks air, the intercepting device 70 does not respond when the air pressure detecting unit 39 detects that the tank body 1 does not leak air, at the moment, the tank body 1 continuously rotates to the second discharging station, and the second discharging station is provided with a discharging mechanism 80 for guiding the tank body 1 out of the positioning groove 21. Specifically, as shown in the figure, the intercepting device 70 includes a movable baffle 71, the movable baffle 71 is pivotally connected to the frame 10 along a vertical axis, an air cylinder 72 for driving the movable baffle 71 to swing is arranged on the frame 10, a first discharging conveyor belt 73 is arranged at a first discharging station, when the air pressure detecting unit 39 detects air leakage of the tank 1, the air cylinder 72 drives the movable baffle 71 to swing to a rotating path of the tank 1, and the tank 1 is gradually guided onto the first discharging conveyor belt 73 by the movable baffle 71 in the rotation process of the positioning seat 20. The discharging mechanism 80 comprises a fixed baffle 81 fixedly connected with the frame 10, the fixed baffle 81 is positioned on the rotation path of the tank body 1, a second discharging conveying belt 82 is arranged at the second discharging station, and the tank body 1 is gradually guided onto the second discharging conveying belt 82 by the fixed baffle 81 in the rotation process of the positioning seat 20. The air pressure detecting unit 39 is a wireless air pressure sensor.
The working process and principle of the invention are explained in detail below in connection with the inspection of a can body 1: firstly, the tank body 1 is pushed into the positioning groove 21 through the feeding mechanism 40, and the feeding mechanism 40 can select a common material pushing cylinder 72; then the positioning seat 20 rotates a step distance to enable the tank body 1 to reach a pressurization station, in the process, the sealing cover 30 descends, the tank body 1 is inflated in the pressurization station, after the inflation is finished, the high-pressure air gun 50 is pulled away from the inflation interface 353, the positioning seat 20 rotates again, the tank body 1 rotates a plurality of step distances along with the positioning seat 20 to perform pressure maintaining for a period of time, after the pressure maintaining is finished, the tank body 1 reaches a pressure relief station, the valve column 38 is pressed down by the vertical pressure rod 60 in the pressure relief station to enable the piston cylinder and the test cavity to be simultaneously decompressed, after the pressure relief is finished, the positioning seat 20 rotates again, when the tank body 1 rotates to the first discharging station, if the previous detection result is air leakage, the movable baffle 71 swings to the moving path of the tank body 1 to block the first discharging conveyer belt 73, and if the previous detection result is air leakage, the movable baffle 71 avoids the conveying path of the tank body 1 to enable the tank body 1 to flow to the second discharging station, the process needs to be realized by a controller, and can be controlled by the existing program, after the tank body 1 reaches the second discharging station, the tank body 1 is intercepted to the second discharging conveyer belt 82 by the fixed baffle 81, and the detection of the tank body 1 is finished.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (9)
1. The utility model provides a canned food gas tightness detection device which characterized in that: the device comprises a positioning seat (20), wherein a positioning groove (21) used for containing a tank body (1) is formed in the positioning seat (20), a sealing cover cap (30) is arranged above the positioning groove (21), the sealing cover cap (30) is movably connected with the positioning seat (20) along the vertical direction, the sealing cover cap (30) comprises an annular side wall and a circular top wall, a sealing device is arranged on the inner wall of the annular side wall, the sealing cover cap (30) is assembled to form a closed testing cavity together with the top wall and part of the side wall of the tank body (1) in the positioning groove (21) when moving downwards relative to the positioning seat (20), the sealing cover cap (30) can be separated from the tank body (1) when moving upwards relative to the positioning seat (20), and an inflation pipeline and an air pressure detection unit (39) are arranged on the sealing cover cap (30);
the sealing device comprises an annular piston (31) movably connected with the side wall of the sealing cover cap (30) along the vertical direction, the annular piston (31) is arranged in a piston cavity arranged in the side wall of the sealing cover cap (30) in a sliding manner, a pressing ring (32) is fixedly connected to the annular piston (31), a step part (34) opposite to the pressing ring (32) is arranged on the inner side of the side wall of the sealing cover cap (30), an elastic sealing ring (33) is arranged between the step part (34) and the pressing ring (32), the elastic sealing ring (33) can be extruded when the pressing ring (32) is closed to the step part (34) and can be expanded towards the inner side of the side wall of the sealing cover cap (30) to tightly support the side wall of the tank body (1), a piston cavity chamber on one side of the annular piston (31) is communicated with an inflation pipeline, and the pressing ring (32) can be driven to close to the step part (34) when the piston cavity chamber on the side is inflated, the piston cavity chamber on the other side is communicated with the atmosphere, and an elastic reset unit (37) used for driving the pressing ring (32) to move towards the direction far away from the step part (34) is arranged in the piston cavity chamber on the other side.
2. The canned food airtightness detection apparatus according to claim 1, wherein: the air charging pipeline comprises a main air inlet pipe (35), a first air inlet branch pipe (351) and a second air inlet branch pipe (352), the main air inlet pipe (35) is communicated with an air charging connector (353) arranged outside the sealing cover cap (30), one ends of the first air inlet branch pipe (351) and the second air inlet branch pipe (352) are communicated with the main air inlet pipe (35), the other end of the first air inlet branch pipe (351) is communicated with the test cavity, and the other end of the second air inlet branch pipe (352) is communicated with the piston cavity; all be equipped with the check valve on first branch air inlet pipe (351) and the second branch air inlet pipe (352), still be equipped with the pilot valve on first branch air inlet pipe (351), the pilot valve is assembled for the closure state under the normality and can make the pilot valve switch on after clamping ring (32) draw close one section stroke to step portion (34).
3. The canned food airtightness detection apparatus according to claim 2, wherein: the pilot valve comprises a cylindrical valve core (36), the valve core (36) is arranged in the sealing cover cap (30) in a sliding mode along the vertical direction, the valve core (36) is located on a path of the first air inlet branch pipe (351), the valve core (36) is fixedly connected with the annular piston (31) through a valve rod, a ring groove (361) is formed in the valve core (36), the ring groove (361) and the first air inlet branch pipe (351) are mutually staggered in a normal state, the first air inlet branch pipe (351) is in a disconnection state at the moment, the ring groove (361) is communicated with the first air inlet branch pipe (351) after the pressure ring (32) draws close to the step part (34) for one stroke, and the first air inlet branch pipe (351) is in a communication state at the moment.
4. The canned food airtightness detection apparatus according to claim 2, wherein: the sealing cover cap (30) is also provided with a pressure relief valve which comprises a valve cavity communicated with the atmosphere, and a valve column (38) arranged in the valve cavity in a sliding manner along the vertical direction, a first exhaust pipe (303) and a second exhaust pipe (304) are arranged in the sealing cover cap (30), the first exhaust pipe (303) is communicated with the valve cavity and the test cavity, the second exhaust pipe (304) is communicated with the valve cavity and the piston cavity, two diameter-variable parts with the diameter smaller than that of the valve column (38) are arranged on the valve column (38), an elastic element (381) is arranged between the valve column (38) and the sealing cover cap (30), the valve column (38) disconnects the first exhaust pipe (303) and the second exhaust pipe (304) from the atmosphere under the action of the elastic element (381) in a normal state, when the valve column (38) moves downward under the action of external force, the first exhaust pipe (303) and the second exhaust pipe (304) can be communicated with the atmosphere through the two variable-diameter parts respectively.
5. The canned food airtightness detection apparatus according to claim 4, wherein: the positioning seat (20) is disc-shaped, the positioning grooves (21) are U-shaped grooves formed in the edge of the positioning seat (20), the positioning grooves (21) are arranged in a plurality at intervals along the circumferential direction of the positioning seat (20), and the positioning seat (20) is arranged on the rack (10) in an intermittent rotating mode; the sealing cover cap (30) is in sliding connection with the positioning seat (20) through a guide rod (301), a guide wheel (302) is arranged at the lower end of the guide rod (301), an annular cam groove (11) fixedly connected with the rack (10) is arranged below the positioning seat (20), the cam groove (11) has an up-and-down fluctuating path structure, and the guide wheel (302) and the cam groove (11) form rolling fit to drive the sealing cover cap (30) to move up and down in the rotating process of the positioning seat (20).
6. The canned food airtightness detection apparatus according to claim 5, wherein: a feeding station, a pressurizing station, a pressure releasing station, a first discharging station and a second discharging station are sequentially arranged on the edge of the positioning seat (20) along the circumferential direction; the feeding station is provided with a feeding mechanism (40) used for feeding the tank body (1) into the positioning groove (21); the pressurization station is provided with a high-pressure air gun (50) movably arranged along the vertical direction, and an air outlet of the high-pressure air gun (50) is opposite to an air inflation interface (353) of the main air inlet pipe (35) along the vertical direction; the pressure relief station is provided with a vertical compression bar (60) driven by an air cylinder (72) or an electric cylinder, and the vertical compression bar (60) is opposite to a valve post (38) of the pressure relief valve; the first discharging station is provided with an intercepting device (70), the intercepting device (70) is electrically connected with the controller, the air pressure detecting unit (39) sends detected air pressure to the controller, the controller controls the intercepting device (70) to take out the tank body (1) from the first discharging station when the controller recognizes that the tank body (1) leaks air, the intercepting device (70) does not respond when the air pressure detecting unit (39) detects that the tank body (1) does not leak air, at the moment, the tank body (1) continuously rotates to a second discharging station, and the second discharging station is provided with a discharging mechanism (80) for guiding the tank body (1) out of the positioning groove (21).
7. The canned food airtightness detection apparatus according to claim 6, wherein: intercepting device (70) include adjustable fender (71), adjustable fender (71) are along vertical axis and frame (10) pin joint, be equipped with on frame (10) and be used for driving adjustable fender (71) wobbling cylinder (72), first ejection of compact station is equipped with first ejection of compact conveyer belt (73), when atmospheric pressure detecting element (39) detected jar body (1) gas leakage, cylinder (72) drive adjustable fender (71) swing to jar body (1) on the gyration route, positioning seat (20) rotate in-process jar body (1) by adjustable fender (71) guide gradually to first ejection of compact conveyer belt (73).
8. The canned food airtightness detection apparatus according to claim 6, wherein: the discharging mechanism (80) comprises a fixed baffle (81) fixedly connected with the rack (10), the fixed baffle (81) is positioned on a rotating path of the tank body (1), a second discharging station is provided with a second discharging conveyer belt (82), and the tank body (1) is gradually guided onto the second discharging conveyer belt (82) by the fixed baffle (81) in the rotating process of the positioning seat (20).
9. The canned food airtightness detection apparatus according to claim 1, wherein: the air pressure detection unit (39) is a wireless air pressure sensor.
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| CN113731839A (en) * | 2021-09-03 | 2021-12-03 | 杨晓 | Food quality rapid detection device |
| CN114397065B (en) * | 2022-01-05 | 2024-03-22 | 侯文峰 | Full-automatic intelligent tank body detection system |
| CN116049756B (en) * | 2023-04-03 | 2023-06-09 | 天津市天立独流老醋股份有限公司 | Intelligent monitoring management system and method for food processing equipment |
| CN116577029B (en) * | 2023-07-14 | 2023-09-15 | 无锡恒大电子科技有限公司 | Gas leakage detection device for gas cylinder |
| CN117147080B (en) * | 2023-10-31 | 2023-12-22 | 徐州德胜石油机械有限公司 | Oil storage tank tightness detection equipment |
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