Differential pressure sealing detection device and medicine bottle packaging equipment

Abstract

The utility model discloses a differential pressure sealing detection device and medicine bottle packaging equipment. The differential pressure sealing detection device comprises a supporting platform; the first sealing cover is used for covering a detection product and is in sealing fit with the supporting platform to form a detection cavity; the differential pressure detection device comprises a first pre-pumping assembly, a second pre-pumping assembly, a comparison module with a comparison cavity, a vacuum mechanism used for vacuum pumping and a differential pressure detection unit used for detecting the pressure difference between a detection cavity and the comparison cavity. The gas path control mechanism is used for respectively controlling the on-off of a gas path between the first pre-pumping assembly and the detection cavity, the on-off of a gas path between the first pre-pumping assembly and the vacuum mechanism, the on-off of a gas path between the second pre-pumping assembly and the comparison cavity and the on-off of a gas path between the second pre-pumping assembly and the vacuum mechanism; the first pre-pumping assembly and the second pre-pumping assembly are jointly communicated to the vacuum mechanism through the gas path control mechanism, and the gas path control mechanism is further used for controlling on-off of a gas path between the first pre-pumping assembly and the second pre-pumping assembly; the device further comprises a lifting mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical packaging, in particular to a differential pressure sealing detection device and medicine bottle packaging equipment. Background Art

[0002] Sealing testing is an essential quality inspection step in the production process of food and pharmaceutical packaging. Currently, leak detection methods often rely on high-voltage discharge, which requires the packaging to be non-conductive and possesses very high insulation properties. This makes it unsuitable for packaging containing metal materials such as aluminum foil. Furthermore, high-voltage discharge leak detectors can discharge during testing, potentially igniting the drug. This makes them unsuitable for use with pharmaceuticals containing flammable or explosive ingredients.

[0003] Among the theoretical leak detection methods currently recommended by the FDA and the National Medical Products Administration, only vacuum decay testing is suitable for products with conductive packaging and for testing the leaks of flammable and explosive pharmaceuticals. Vacuum decay testing involves evacuating a sealed container and determining leaks based on the pressure differential. Online testing to achieve rapid sealing of the container is a key step in vacuum testing.

[0004] refer to Figure 2 , is a curve diagram for vacuum decay detection using a single detection frame, the curve changes are not obvious, and the detection accuracy is low; in the differential pressure seal detection device of the prior art, reference Figure 1 The method mainly involves placing a sample bottle in a vacuum-evacuated sealed cover and then comparing it with the bottle to be tested, which is also placed in the sealed cover. If there is a pressure difference between the two, the test is judged as unqualified. However, the vacuum decay method takes a long time to detect. By vacuuming the two and observing the pressure difference curve, a preliminary judgment on whether there is a serious leak can be made. Since the test process involves repeated vacuuming and pressure relief, and it is impossible to ensure that the negative pressure in the two sealed covers is completely consistent, the existing detection device has difficulty in detecting leaks from tiny holes. Utility Model Content

[0005] The utility model provides a differential pressure sealing detection device and medicine bottle packaging equipment, which solve the technical problem that the existing sealing detection is difficult to detect tiny holes.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A differential pressure sealing detection device is used to detect the sealing performance of a test object, comprising:

[0008] A supporting platform for placing the test object;

[0009] A first sealing cover is arranged on the support platform and is used to cover the test object and seal with the support platform to form a test cavity;

[0010] A differential pressure detection device includes a first pre-evacuation assembly, a second pre-evacuation assembly, a comparison module having a comparison chamber, a vacuum mechanism for evacuating, and a differential pressure detection unit for detecting a pressure difference between the detection chamber and the comparison chamber; the volume of the comparison chamber is the difference between the inner volume of the first sealing cover and the volume of the test object; the first pre-evacuation assembly has a first pre-evacuation chamber connected to the detection chamber and the vacuum mechanism, respectively; the second pre-evacuation assembly has a second pre-evacuation chamber connected to the comparison chamber and the vacuum mechanism, respectively;

[0011] An air path control mechanism is used to respectively control the opening and closing of the air path between the first pre-evacuation component and the detection chamber, the opening and closing of the air path between the first pre-evacuation component and the vacuum mechanism, the opening and closing of the air path between the second pre-evacuation component and the comparison chamber, and the opening and closing of the air path between the second pre-evacuation component and the vacuum mechanism. The first pre-evacuation component and the second pre-evacuation component are both connected to the vacuum mechanism via the air path control mechanism. The air path control mechanism is also used to control the opening and closing of the air path between the first pre-evacuation component and the second pre-evacuation component.

[0012] The lifting mechanism is used to be connected to the first sealing cover and to control the distance between the first sealing cover and the supporting platform.

[0013] As a further improvement of the above technical solution, a first support seat for cooperating with the first sealing cover and a second support seat for installing the comparison module are provided on the support platform, and the first support seat and the second support seat are respectively provided with upper and lower through-going channels, the first pre-pumping component is connected to the channel of the first support seat, and the second pre-pumping component is connected to the channel of the second support seat; the differential pressure detection device includes a detection pipeline, the two ends of the detection pipeline are respectively connected to the first pre-pumping component and the second pre-pumping component, and the differential pressure detection unit is arranged in the detection pipeline.

[0014] As a further improvement of the above technical solution, the support platform is a rotating platform, the differential pressure sealing detection device includes a rotating component for rotating with the support platform, the lifting mechanism includes a first lifting rod vertically slidably connected to the rotating component and a lifting component fixedly arranged on the first lifting rod, the first lifting rod is connected to the first sealing cover, and a lifting cam is fixedly arranged on one side outside the rotating component, which is used to make the lifting component cooperate with the lifting cam when the rotating component drives the lifting mechanism to rotate circumferentially to a preset position, and then drive the first sealing cover to rise via the first lifting rod.

[0015] As a further improvement of the above technical solution, the air path control mechanism includes a first switch unit arranged between the air inlet of the first pre-evacuation component and the detection chamber, a second switch unit between the air inlet of the second pre-evacuation component and the comparison chamber, a third switch unit between the air suction port of the first pre-evacuation component and the vacuum mechanism, and a fourth switch unit arranged between the air suction port of the second pre-evacuation component and the vacuum mechanism; the outlet ends of the third switch unit and the fourth switch unit are connected to the vacuum mechanism via a fifth switch unit, or a connecting pipe is arranged between the first pre-evacuation component and the second pre-evacuation chamber to connect the first pre-evacuation chamber and the second pre-evacuation chamber, and the fifth switch unit is arranged in the connecting pipe.

[0016] As a further improvement of the above technical solution, the first pre-evacuation component and the second pre-evacuation component are respectively connected to a pressure detection unit.

[0017] As a further improvement of the above technical solution, the air path control mechanism includes a pressure relief unit respectively arranged on the first pre-extraction component and the second pre-extraction component, or the lifting mechanism includes a second lifting rod vertically slidably connected to the slidingly connected to the rotating component, the second lifting rod is connected to the comparison module, and the second lifting rod is provided with a linkage rod for cooperating with the lifting component to drive the second lifting rod to rise through the lifting component and the linkage rod.

[0018] As a further improvement of the above technical solution, the comparison module includes a second sealing cover, the inner cavity of the second sealing cover is a comparison cavity, or the second sealing cover has the same structure as the first sealing cover. The comparison module also includes a comparison structure arranged on a second support seat, the volume of the comparison structure matches the volume of the standard test product, and the comparison cavity is formed between the outer wall of the comparison structure and the second sealing cover.

[0019] As a further improvement of the above technical solution, multiple first support seats are evenly arranged along the circumference of the support platform, multiple comparison modules are evenly arranged along the circumference of the support platform, and the number and circumferential position of the first support seats match those of the comparison modules.

[0020] As a further improvement of the above technical solution, a limiting structure is provided at the position of the first support seat corresponding to the channel, the shape of the wall of the limiting structure facing the center of the first support seat matches the outer wall shape of the test object, and the channel passes through the limiting structure up and down.

[0021] On the other hand, a medicine bottle packaging device is also provided, which is equipped with any of the differential pressure sealing detection devices described above.

[0022] The utility model has the following beneficial effects:

[0023] After the first sealing cover is lifted up a certain distance by the lifting mechanism, the test object is transferred to the corresponding position on the support platform by auxiliary equipment such as a manipulator, a rotating fixture or a dial wheel. Before the test, the first sealing cover under the lifting mechanism cooperates with the support platform to achieve sealing to form a test cavity. The air path control mechanism disconnects the air path between the first pre-extraction component and the test cavity and the air path between the second pre-extraction component and the comparison cavity, opens the air path between the first pre-extraction component and the second pre-extraction component and the vacuum mechanism, and opens the air path between the first pre-extraction component and the second pre-extraction component. At this time, the vacuum mechanism pre-extracts the differential pressure detection device, so that the air pressure of the first pre-extraction component and the second pre-extraction component is negative pressure, and the first pre-extraction component and the second pre-extraction component are closed. The air path between the first pre-pumping component and the second pre-pumping component is connected to the air path of the vacuum mechanism, and the first pre-pumping component and the second pre-pumping component remain connected for a certain period of time to allow the air pressures therebetween to reach equilibrium, and then the air path connection between the first pre-pumping component and the second pre-pumping component is closed. At this time, the air pressures of the first pre-pumping component and the second pre-pumping component are equal, and the air path control mechanism closes the air path between the first pre-pumping component and the second pre-pumping component, opens the air path between the first pre-pumping component and the detection chamber, and opens the air path between the second pre-pumping component and the comparison chamber. Under the action of the negative pressure in the first pre-pumping component and the second pre-pumping component, the detection chamber and the comparison chamber are vacuumed respectively, and the pressure difference between the two chambers is detected by the differential pressure detection unit. The leakage of the product to be inspected can be judged according to the size of the pressure difference to screen out unqualified products. The differential pressure detection device simulates the differential pressure detection of the test sample and the standard sample by setting a detection chamber and a comparison chamber, and sets a pre-evacuation component to perform pre-vacuuming. When the two pre-evacuation components have the same negative pressure, the connection with the vacuum mechanism is disconnected and the pre-evacuation components are connected to the corresponding chambers respectively to realize negative pressure extraction, ensuring that the negative pressure acting on the detection chamber and the comparison chamber is the same. In addition, the two pre-evacuation components are controlled by the air path control mechanism to be connected before disconnecting the connection with the vacuum mechanism and vacuuming the detection chamber and the comparison chamber, so that the air pressure between the two pre-evacuation components is balanced, and thus the two theoretically have completely equal negative pressures. It can avoid the certain error in the vacuum pressure at both ends caused by various factors when the vacuum mechanism is evacuated, and at the same time avoid the influence of residual air pressure in the pipeline. Based on the structure of the device and the principle of differential pressure detection, the two do not need to consider the actual pressure value. The pressure difference generated when the negative pressure of the two is equal is completely caused by leakage, which greatly improves the detection efficiency and greatly improves the detection accuracy. Compared with the conventional technical solution of simultaneously evacuating two chambers and then performing differential pressure detection in the prior art, the detection accuracy is improved by more than 100 times, achieving improved accuracy and freedom from the influence of negative pressure size.

[0024] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a bottle sealing detection device in the prior art;

[0027] Figure 2 This is a curve diagram of the change of a single test frame detection in the prior art;

[0028] Figure 3 It is a structural diagram of a preferred embodiment of the utility model;

[0029] Figure 4 This is a partial structural diagram of the first sealing cover in a preferred embodiment of the present utility model;

[0030] Figure 5 This is a qualified product detection curve diagram of the preferred embodiment of the utility model;

[0031] Figure 6 This is a defective product detection curve diagram of a preferred embodiment of the utility model;

[0032] Figure 7 It is a top view of a preferred embodiment of the utility model.

[0033] Legend:

[0034] 1. Test product 2. First sealing cover 201. Test chamber 202. Sealing ring 203. Groove 3. First pre-extraction assembly 301. Pre-extraction frame 302. Connecting tube 303. Quick-release clamp 4. Second pre-extraction assembly 5. Comparison module 501. Second sealing cover 502. Comparison chamber 6. Vacuum mechanism 7. Lifting mechanism 701. First lifting rod 702. Lifting assembly 703. Second lifting rod 704. Linking rod 8. Lifting cam 901. First switch unit 902. Second switch unit 903. Third switch unit 904. Fourth switch unit 905. Fifth switch unit 906. Differential pressure detection unit 907. Pressure detection unit 908. Pressure relief unit 10. Support platform 101. First support seat 102. Second support seat 103. Limiting structure 104. Channel 11. Input track 12. Input dial wheel 13. Output dial wheel 14. Output track 15. Unqualified product track. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0036] Figure 3 It is a structural diagram of a preferred embodiment of the utility model; Figure 4 This is a partial structural diagram of the first sealing cover in a preferred embodiment of the present utility model; Figure 5 This is a qualified product detection curve diagram of the preferred embodiment of the utility model; Figure 6 This is a defective product detection curve diagram of a preferred embodiment of the utility model; Figure 7 It is a top view of a preferred embodiment of the utility model.

[0037] like Figures 3 to 6 As shown, the differential pressure seal detection device of this embodiment is used to detect the sealing of the test object 1, which is a medical package such as a medicine bottle. The differential pressure seal detection device includes:

[0038] A supporting platform 10 is used to place the test object 1;

[0039] The first sealing cover 2 is arranged on the supporting platform 10 and is used to cover the test object 1 and seal with the supporting platform 10 to form a test cavity 201;

[0040] The differential pressure detection device includes a first pre-evacuation component 3, a second pre-evacuation component 4, a comparison module 5 having a comparison chamber 502, a vacuum mechanism 6 for evacuating, and a differential pressure detection unit 906 for detecting the pressure difference between the detection chamber 201 and the comparison chamber 502; the volume of the comparison chamber 502 is the difference between the inner volume of the first sealing cover 2 and the volume of the test object 1; the first pre-evacuation component 3 has a first pre-evacuation chamber connected to the detection chamber 201 and the vacuum mechanism 6, respectively, and the second pre-evacuation component 4 has a second pre-evacuation chamber connected to the comparison chamber 502 and the vacuum mechanism 6, respectively;

[0041] An air path control mechanism is used to respectively control the on-off of the air path between the first pre-evacuation component 3 and the detection chamber 201, the on-off of the air path between the first pre-evacuation component 3 and the vacuum mechanism 6, the on-off of the air path between the second pre-evacuation component 4 and the comparison chamber 502, and the on-off of the air path between the second pre-evacuation component 4 and the vacuum mechanism 6. The first pre-evacuation component 3 and the second pre-evacuation component 4 are both connected to the vacuum mechanism 6 via the air path control mechanism. The air path control mechanism is also used to control the on-off of the air path between the first pre-evacuation component 3 and the second pre-evacuation component 4;

[0042] The lifting mechanism 7 is used to be connected to the first sealing cover 2 and to control the distance between the first sealing cover 2 and the supporting platform 10 .

[0043] The vacuum mechanism 6 can be a vacuum device such as a vacuum pump. In this embodiment, the test object 1 is a bottle as an example.

[0044] The working principle of this differential pressure sealing detection device: the first sealing cover 2 is lifted up a certain distance by the lifting mechanism 7, and then the detection product 1 is transferred to the corresponding position on the support platform 10 by auxiliary equipment such as a manipulator, a rotating clamp or a dial wheel. Before the detection, the first sealing cover 2 under the lifting mechanism 7 cooperates with the support platform 10 to achieve sealing to form a detection chamber 201, and the air path control mechanism disconnects the air path between the first pre-evacuation component 3 and the detection chamber 201 and disconnects the air path between the second pre-evacuation component 4 and the comparison chamber 502, opens the air path between the first pre-evacuation component 3 and the second pre-evacuation component 4 and the vacuum mechanism 6, and opens the air path between the first pre-evacuation component 3 and the second pre-evacuation component 4. At this time, the vacuum mechanism 6 pre-evacuates the differential pressure detection device, so that the air pressure of the first pre-evacuation component 3 and the second pre-evacuation component 4 is negative pressure, and the first pre-evacuation component is closed. 3 and the second pre-evacuation component 4 are connected to the air path of the vacuum mechanism 6, and the first pre-evacuation component 3 and the second pre-evacuation component 4 remain connected for a certain period of time to allow the air pressures of the two to reach equilibrium, and then the air path connection between the first pre-evacuation component 3 and the second pre-evacuation component 4 is closed. At this time, the air pressures of the first pre-evacuation component 3 and the second pre-evacuation component 4 are equal, and the air path control mechanism closes the air path between the first pre-evacuation component 3 and the second pre-evacuation component 4, opens the air path between the first pre-evacuation component 3 and the detection chamber 201 and the air path between the second pre-evacuation component 4 and the comparison chamber 502, and under the action of the negative pressure in the first pre-evacuation component 3 and the second pre-evacuation component 4, the detection chamber 201 and the comparison chamber 502 are vacuumed respectively, and the pressure difference between the two chambers is detected by the differential pressure detection unit 906. According to the size of the pressure difference, the leakage of the product to be inspected can be judged to screen out unqualified products. The differential pressure detection device simulates the differential pressure detection of the test product 1 and the standard product by setting the test chamber 201 and the comparison chamber 502, and sets a pre-evacuation component to pre-vacuum. When the two pre-evacuation components have the same negative pressure, the connection with the vacuum mechanism 6 is disconnected and the pre-evacuation components are respectively connected to the corresponding chambers to realize the negative pressure extraction, so as to ensure that the negative pressure acting on the test chamber 201 and the comparison chamber 502 is the same. In addition, the two pre-evacuation components are controlled by the air path control mechanism to be connected before disconnecting the connection with the vacuum mechanism 6 and before vacuuming the test chamber 201 and the comparison chamber 502, so that the air pressure between the two pre-evacuation components is balanced, thereby making the two Theoretically, it has completely equal negative pressure, which can avoid certain errors in the vacuum pressure at both ends caused by various factors when the vacuum mechanism 6 is evacuated, and at the same time avoid the influence of residual air pressure in the pipeline. Based on the structure of this device and the principle of differential pressure detection, the two do not need to consider the actual pressure value. The pressure difference generated when the negative pressure of the two is equal is completely caused by leakage, which greatly improves the detection efficiency and detection accuracy. Compared with the conventional technical solution of vacuuming two chambers at the same time and then performing differential pressure detection in the existing technology, the detection accuracy is improved by more than 100 times, achieving improved accuracy and freedom from the influence of negative pressure size.

[0045] It should be noted that the first pre-extraction assembly 3 includes the connecting tubes 302 and the pre-extraction frame 301, and the second pre-extraction assembly 4 has the same structure as the first pre-extraction assembly 3, ensuring that the internal volume and pipeline volume of the two are exactly the same, ensuring that the detection accuracy is not affected by the volume difference during detection;

[0046] In this embodiment, a first support seat 101 for cooperating with the first sealing cover 2 and a second support seat 102 for installing the comparison module 5 are provided on the support platform 10, and the first support seat 101 and the second support seat 102 are respectively provided with a channel 104 running through from top to bottom, the first pre-pumping component 3 is connected to the channel 104 of the first support seat 101, and the second pre-pumping component 4 is connected to the channel 104 of the second support seat 102; the differential pressure detection device includes a detection pipeline, and the two ends of the detection pipeline are respectively connected to the first pre-pumping component 3 and the second pre-pumping component 4, the differential pressure detection unit 906 is arranged in the detection pipeline, and the differential pressure detection unit 906 is a differential pressure sensor or a differential pressure transmitter, etc.; after the first pre-pumping component 3 and the second pre-pumping component 4 are respectively connected to the detection chamber 201 and the comparison chamber 502, if there is a pressure difference between the two, refer to Figure 5 and Figure 6 The numerical curve fed back by the differential pressure detection unit 906 has an impact value, and gradually increases until it becomes constant after falling back. Whether there is a leak can be easily judged based on the curve. However, the detection method in the prior art causes the leakage source to start leaking during the vacuuming process of the two chambers and there is a vacuuming pressure error itself. The change of the feedback numerical curve is not obvious. After the curve changes and becomes constant, it is difficult to achieve high-precision judgment and it is impossible to detect extremely small leakage sources.

[0047] In some embodiments, the comparison module 5 includes a second sealing cover 501, and the inner cavity of the second sealing cover 501 is a comparison cavity 502, that is, the second sealing cover 501 is selected according to the volume matching of the test product 1, so that its inner cavity matches the volume of the test cavity 201, or the second sealing cover 501 has the same structure as the first sealing cover 2. The comparison module 5 also includes a comparison structure arranged on the second support seat 102, and the volume of the comparison structure matches the volume of the standard test product 1. A comparison cavity 502 is formed between the outer wall of the comparison structure and the second sealing cover 501. The use of the comparison structure can reduce the types of parts, and the comparison structure can be a standard test product 1.

[0048] In one embodiment, the support platform 10 is a rotating platform, and the differential pressure sealing detection device includes a rotating assembly for rotating with the support platform 10, and the lifting mechanism 7 includes a first lifting rod 701 vertically slidably connected to the rotating assembly and a lifting assembly 702 fixedly provided on the first lifting rod 701, the first lifting rod 701 is connected to the first sealing cover 2, and a lifting cam 8 is fixedly provided on one side outside the rotating assembly, which is used to make the lifting assembly 702 cooperate with the lifting cam 8 when the rotating assembly drives the lifting mechanism 7 to rotate circumferentially to a preset position, thereby driving the first sealing cover 2 to rise through the first lifting rod 701; when the support platform 10 rotates to the preset circumferential position, the lifting assembly 702 cooperates with the lifting cam 8 to act on the first lifting rod 701 to drive the first sealing cover 2 to rise, so that the test product 1 can be placed in or unloaded, and after the support platform 10 rotates away from the circumferential position, the first sealing cover 2 descends under the action of gravity until it cooperates with the first support seat 101;

[0049] Among them, the first sealing cover 2 and the second sealing cover 501 are respectively embedded with sealing rings 202 at one end facing the support platform 10, and are sealed when the ends of the two are in contact with the support platform 10; wherein, the first sealing cover 2 and the second sealing cover 501 are respectively opened with grooves for embedding the sealing ring 202 at one end facing the support platform 10, and the inner wall of the groove is processed with a groove 203, which can make the inner wall of the groove fit more closely with the sealing ring 202, thereby improving the sealing effect, and at the same time has an axial positioning function to prevent the sealing ring 202 from falling off during the reciprocating movement of the first sealing cover 2, resulting in sealing failure.

[0050] In one embodiment, the air path control mechanism includes a first switch unit 901 arranged between the air inlet of the first pre-evacuation component 3 and the detection chamber 201, a second switch unit 902 between the air inlet of the second pre-evacuation component 4 and the comparison chamber 502, a third switch unit 903 between the air suction port of the first pre-evacuation component 3 and the vacuum mechanism 6, and a fourth switch unit 904 arranged between the air suction port of the second pre-evacuation component 4 and the vacuum mechanism 6; the outlet ends of the third switch unit 903 and the fourth switch unit 904 are connected to the vacuum mechanism 6 via the fifth switch unit 905, or a connecting pipeline is set between the first pre-evacuation component 3 and the second pre-evacuation component 4 to connect the first pre-evacuation chamber and the second pre-evacuation chamber, and the fifth switch unit 905 is set in the connecting pipeline; the first switch unit 901 and the second switch unit 902 disconnect the air path between the first pre-evacuation component 3 and the detection chamber 201 and the air path between the second pre-evacuation component 4 and the comparison chamber 502, and the third switch unit 903 opens the first pre-evacuation component 3 and the vacuum mechanism 6 The air path of the vacuum mechanism 6 is opened, the fourth switch unit 904 opens the air path between the second pre-evacuation component 4 and the vacuum mechanism 6, the fifth switch unit 905 opens the air path between the first pre-evacuation component 3 and the second pre-evacuation component 4, and the vacuum mechanism 6 pre-evacuates the differential pressure detection device to make the air pressure of the first pre-evacuation component 3 and the second pre-evacuation component 4 negative pressure, close the third switch unit 903 and the fourth switch unit 904, the first pre-evacuation component 3 and the second pre-evacuation component 4 remain connected for a certain time to allow the air pressures of the two to reach equilibrium, and then close the fifth switch unit 905. At this time, the air pressures of the first pre-evacuation component 3 and the second pre-evacuation component 4 are equal, open the first switch unit and the second switch unit 902, and then open the air path between the first pre-evacuation component 3 and the detection chamber 201 and the air path between the second pre-evacuation component 4 and the comparison chamber 502. Under the action of the negative pressure in the first pre-evacuation component 3 and the second pre-evacuation component 4, the detection chamber 201 and the comparison chamber 502 are vacuumed respectively, and the pressure difference between the two chambers is detected by the differential pressure detection unit 906.

[0051] It should be understood that each switching unit may be a solenoid valve.

[0052] In one embodiment, the first pre-extraction component 3 and the second pre-extraction component 4 are respectively connected to a pressure detection unit 907, which can determine whether the pressures of the two are balanced and equal during the connection between the two; specifically, it can be a pressure gauge, which is connected to the first pre-extraction component 3 or the second pre-extraction component 4 through a quick-release clamp 303 to achieve quick assembly; similarly, the remaining connection positions of the pre-extraction components can be connected using a quick-release clamp 303.

[0053] In one embodiment, the air path control mechanism includes a pressure relief unit 908, such as a pressure relief valve, which is respectively provided in the first pre-extraction component 3 and the second pre-extraction component 4. After the test is completed, the pressure is relieved to restore the chamber to atmospheric pressure to avoid the residual pressure affecting subsequent detection. In some embodiments, the lifting mechanism 7 can also include a second lifting rod 703 that is vertically slidably connected to a second lifting rod 703 that is slidably connected to a rotating component. The second lifting rod 703 is connected to the comparison module 5. The second lifting rod 703 is provided with a linkage rod 704 for cooperating with the lifting component 702 to drive the second lifting rod 703 through the lifting component 702 and the linkage rod 704. 3 rises. When the lifting assembly 702 cooperates with the lifting cam 8 in the rising process, it cooperates with the linkage rod 704 to drive the second sealing cover 501 to rise to achieve simultaneous pressure relief for both, which is more efficient than using a pressure relief valve. Among them, the cooperation height of the lifting assembly 702 and the linkage rod 704 is close to the end of the stroke of the lifting assembly 702, that is, the lifting assembly 702 cooperates with the linkage rod 704 only when the first sealing cover 2 is lifted to nearly the highest point, so that the second sealing cover 501 rises slightly to achieve pressure relief, avoids excessive stroke, and has a more stable and reliable structure. It should be understood that the above technical solutions can be applied selectively or simultaneously.

[0054] In some embodiments, a limiting structure 103 is provided on the first support seat 101 and the second support seat 102 at positions corresponding to the channel 104 respectively. The shape of the wall surface of the limiting structure 103 facing the center of the first support seat 101 matches the outer wall shape of the test product 1. The channel 104 passes through the limiting structure 103 up and down. The limiting structure 103 is used as a bottle stop block to position the test product 1. At the same time, the channel 104 is formed through the limiting structure 103 to avoid blocking the channel 104 after the test product 1 is placed and affecting vacuum extraction, thereby ensuring detection accuracy.

[0055] The limiting mechanism is arranged on a side away from the periphery of the support platform 10 , and the test object 1 is moved in from the periphery of the support platform 10 , thereby improving the positioning support effect.

[0056] In some embodiments, multiple first support seats 101 are evenly arranged along the circumference of the support platform 10, and multiple comparison modules 5 are evenly arranged along the circumference of the support platform 10. The number and circumferential position of the first support seats 101 match those of the comparison modules 5, that is, when any first support seat 101 on the support platform 10 rotates to a circumferential position matching the lifting cam 8, the first sealing cover 2 rises, and the inspection product 1 can be unloaded or put in.

[0057] On the other hand, this embodiment also provides a medicine bottle packaging device, referring to Figure 7, the above-mentioned differential pressure sealing detection device is applied; it can be understood that the support platform 10 is connected with the input track 11 and the output track 14 respectively, and the lifting cams 8 are respectively provided at the positions corresponding to the input track 11 and the output track 14. The detection products 1 are arranged in an orderly and tight manner on the input track 11, and the input dial wheel 12 drives the detection product 1 to rotate and enter the first support seat 101 of the support platform 10. The support platform 10 continues to rotate to place the next detection product 1. The differential pressure sealing test is carried out simultaneously during the rotation process. After the test is completed, when it reaches the position of the output track 14, the lifting cam 8 causes the first sealing cover 2 to rise, and the detection product 1 is unloaded and transported.

[0058] It should be noted that the medicine bottle packaging equipment is also provided with a sorting mechanism for separating unqualified products. The sorting mechanism can be integrated in parallel with the output track 14, that is, the output dial wheel 13 transfers the inspected product 1 to the output track 14 or the unqualified product track 15 according to the qualified status.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A differential pressure seal detection device, used to detect the sealability of a test object (1), characterized in that: include: A supporting platform (10) for placing the test object (1); A first sealing cover (2) is arranged on the supporting platform (10) and is used to cover the test object (1) and seal with the supporting platform (10) to form a test cavity (201); A differential pressure detection device, comprising a first pre-evacuation component (3), a second pre-evacuation component (4), a comparison module (5) having a comparison chamber (502), a vacuum mechanism (6) for evacuating, and a differential pressure detection unit (906) for detecting the pressure difference between the detection chamber (201) and the comparison chamber (502); the volume of the comparison chamber (502) is the difference between the volume of the inner chamber of the first sealing cover (2) and the volume of the test object (1); the first pre-evacuation component (3) has a first pre-evacuation chamber connected to the detection chamber (201) and the vacuum mechanism (6) respectively, and the second pre-evacuation component (4) has a second pre-evacuation chamber connected to the comparison chamber (502) and the vacuum mechanism (6) respectively; An air path control mechanism, used to respectively control the on-off of the air path between the first pre-pumping component (3) and the detection chamber (201), the on-off of the air path between the first pre-pumping component (3) and the vacuum mechanism (6), the on-off of the air path between the second pre-pumping component (4) and the comparison chamber (502), and the on-off of the air path between the second pre-pumping component (4) and the vacuum mechanism (6); the first pre-pumping component (3) and the second pre-pumping component (4) are connected to the vacuum mechanism (6) via the air path control mechanism; the air path control mechanism is also used to control the on-off of the air path between the first pre-pumping component (3) and the second pre-pumping component (4); A lifting mechanism (7) is used to be connected to the first sealing cover (2) and to control the distance between the first sealing cover (2) and the supporting platform (10).

2. The differential pressure seal detection device according to claim 1, characterized in that: The support platform (10) is provided with a first support seat (101) for cooperating with the first sealing cover (2) and a second support seat (102) for installing the comparison module (5); the first support seat (101) and the second support seat (102) are respectively provided with a channel (104) which passes through from top to bottom; the first pre-pumping component (3) is connected to the channel (104) of the first support seat (101), and the second pre-pumping component (4) is connected to the channel (104) of the second support seat (102); the differential pressure detection device comprises a detection pipeline, the two ends of the detection pipeline are respectively connected to the first pre-pumping component (3) and the second pre-pumping component (4); the differential pressure detection unit (906) is arranged in the detection pipeline.

3. The differential pressure seal detection device according to claim 2, characterized in that: The support platform (10) is a rotating platform, the differential pressure seal detection device includes a rotating component for rotating with the support platform (10), the lifting mechanism (7) includes a first lifting rod (701) vertically slidably connected to the rotating component and a lifting component (702) fixedly arranged on the first lifting rod (701), the first lifting rod (701) is connected to the first sealing cover (2), and a lifting cam (8) is fixedly arranged on one side outside the rotating component, which is used to make the lifting component (702) cooperate with the lifting cam (8) when the rotating component drives the lifting mechanism (7) to rotate circumferentially to a preset position, thereby driving the first sealing cover (2) to rise via the first lifting rod (701).

4. The differential pressure seal detection device according to claim 2, characterized in that: The gas path control mechanism comprises a first switch unit (901) arranged between the air inlet of the first pre-evacuation component (3) and the detection chamber (201), a second switch unit (902) between the air inlet of the second pre-evacuation component (4) and the comparison chamber (502), a third switch unit (903) between the air suction port of the first pre-evacuation component (3) and the vacuum mechanism (6), and a fourth switch unit (904) arranged between the air suction port of the second pre-evacuation component (4) and the vacuum mechanism (6); the outlet ends of the third switch unit (903) and the fourth switch unit (904) are connected to the vacuum mechanism (6) via a fifth switch unit (905); or a connecting pipeline is arranged between the first pre-evacuation component (3) and the second pre-evacuation component (4) to connect the first pre-evacuation chamber and the second pre-evacuation chamber, and the fifth switch unit (905) is arranged in the connecting pipeline.

5. The differential pressure seal detection device according to claim 2, characterized in that: The first pre-extraction component (3) and the second pre-extraction component (4) are respectively connected to a pressure detection unit (907).

6. The differential pressure seal detection device according to claim 3, characterized in that: The air path control mechanism includes a pressure relief unit (908) respectively arranged on the first pre-extraction component (3) and the second pre-extraction component (4), or the lifting mechanism (7) includes a second lifting rod (703) vertically slidably connected to the rotating component, the second lifting rod (703) is connected to the comparison module (5), and the second lifting rod (703) is provided with a linkage rod (704) for cooperating with the lifting component (702) to drive the second lifting rod (703) to rise via the lifting component (702) and the linkage rod (704).

7. The differential pressure seal detection device according to any one of claims 2 to 6, characterized in that: The comparison module (5) comprises a second sealing cover (501), the inner cavity of the second sealing cover (501) being a comparison cavity (502), or the second sealing cover (501) having the same structure as the first sealing cover (2), and the comparison module (5) further comprises a comparison structure arranged on the second support seat (102), the volume of the comparison structure matches the volume of the standard test product (1), and the comparison cavity (502) is formed between the outer wall of the comparison structure and the second sealing cover (501).

8. The differential pressure seal detection device according to any one of claims 2 to 6, characterized in that: A plurality of the first support seats (101) are evenly arranged along the circumference of the support platform (10), and a plurality of the comparison modules (5) are evenly arranged along the circumference of the support platform (10), and the number and circumferential position of the first support seats (101) and the comparison modules (5) match.

9. The differential pressure seal detection device according to any one of claims 2 to 6, characterized in that: A limiting structure (103) is arranged on the first support seat (101) at a position corresponding to the channel (104); a wall shape of one side of the limiting structure (103) facing the center of the first support seat (101) matches an outer wall shape of the test object (1); and the channel (104) passes through the limiting structure (103) from top to bottom.

10. A medicine bottle packaging device, characterized in that: The differential pressure seal detection device according to any one of claims 1 to 9 is used.

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