Plastic packaging liquid leak detection machine

Abstract

The invention discloses a plastic package liquid leak hunting machine, and relates to the technical field of leak hunting, and the machine comprises a conveying device which is used for directionally conveying plastic bottles; the leak detection assembly is used for detecting the air tightness of the plastic bottles and comprises a sealing piece arranged at the top of the conveying device, an inflation piece arranged at the top of the sealing piece and a test piece arranged on the side face of the sealing piece; and the positioning assembly is used for positioning the plastic bottles and facilitating subsequent leak detection and comprises a moving part arranged on the top surface of the conveying device, a clamping part arranged on the top of the moving part and a switch part arranged on the inner side of the moving part. According to the plastic package liquid leak hunting machine, an existing water immersion method is improved and further extended, when a leak hunting test is carried out on plastic bottles, the plastic bottles do not need to be subjected to water immersion treatment, so that the drying cost is avoided when leak hunting is carried out on a large number of plastic bottles, assembly line operation can be achieved, the implementation mode is simple, and the efficiency is high. And therefore, the production efficiency during full inspection of the plastic bottles is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of leakage detection, in particular to a plastic packaging liquid leakage detector. Background Art

[0002] Beverages or mineral water have become a must-have drink in supermarkets of all sizes, and plastic bottles as a medium for beverages have become the core competitiveness of the beverage production industry. In order to prevent the leakage of beverage liquids, plastic bottles need to be leak tested after blow molding. According to the requirements of the national standard GB / T15171-94, the air tightness test of plastic bottles usually uses the immersion method. This method requires the naked eye to observe the generation of bubbles in the water after the vacuum operation to determine whether the plastic bottle has a leak.

[0003] In actual production, some companies with higher requirements have full inspection requirements for the sealing of plastic bottles, and the immersion method can only make simple qualitative judgments on random samples, and the plastic bottles need additional drying treatment after immersion, which undoubtedly increases costs. Therefore, a quick leak detection method is needed to detect leaks in plastic bottles. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a plastic packaging liquid leak detector is provided. When in use, a plastic bottle is placed in a sealed environment and air is blown into the plastic bottle, and the concentration of bubbles generated by the overflowing gas is used to detect whether the plastic bottle is damaged.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A plastic packaging liquid leak detector, comprising: a conveying device for directional conveying of plastic bottles; A leak detection assembly, used to check the air tightness of plastic bottles, comprising a sealing member disposed on the top of the conveyor, an inflating member disposed on the top of the sealing member, and a testing member disposed on the side of the sealing member; The positioning assembly is used to position the plastic bottle to facilitate subsequent leak detection, and includes a moving part arranged on the top surface of the conveying device, a clamping part arranged on the top of the moving part, and a switch part arranged on the inner side of the moving part.

[0007] As a preferred embodiment of the plastic packaging liquid leak detector described in the present invention, the sealing member includes a support frame, an electric push rod and a sealing cover, the support frame is fixedly arranged on the top of the conveying device, the electric push rod is provided with a pair of push rods symmetrically arranged on the inner top of the support frame, and the sealing cover is respectively fixedly arranged on the output ends of different electric push rods through ear plates on both sides.

[0008] As a preferred embodiment of the plastic packaging liquid leak detector described in the present invention, the inflatable component includes an air pump, a hose, an expansion cover, an extension tube and a sealing gasket. The air pump is fixedly arranged on the top of the support frame, the hose is connected to the air outlet of the air pump, and the expansion cover is fixedly arranged at the center of the top inner side of the sealing cover.

[0009] As a preferred embodiment of the plastic packaging liquid leak detector described in the present invention, the extension tube is located at the center of the outward expansion cover and is connected to the inner top of the sealing cover, the sealing gasket is supported by rubber and adhered to the side of the extension tube, and the end of the hose away from the air pump passes through the top of the support frame and is connected to the extension tube.

[0010] As a preferred embodiment of the plastic packaging liquid leak detector described in the present invention, the test piece includes a fixed tube 1, a fixed tube 2, a conical mouth, a gravity ball and a bubble detector, the fixed tube 1 is connected to the side of the sealing cover, the fixed tube 2 is sleeved and fixedly arranged on the end of the fixed tube 1, the conical mouth is opened at the end of the fixed tube away from the sealing cover, the gravity ball abuts against the conical surface of the conical mouth, and the bubble detector is clamped on the side of the concave bend of the fixed tube, wherein the interior of the concave bend of the fixed tube 2 is filled with distilled water, and the end of the fixed tube 1 away from the sealing cover is immersed in the distilled water.

[0011] As a preferred embodiment of the plastic packaging liquid leakage detector described in the present invention, the movable part includes a circular base, a sliding disk, a side plate and an LED lamp, the circular base is fixedly arranged on the top of the conveying device, an inner groove is opened on the inner side of the circular base, the sliding disk is located on the inner side of the circular base, the side plate is fixedly arranged on the side of the sliding disk and partially extends to the inner side of the inner groove, the sliding disk is slidably arranged on the inner side of the circular base through the side plate, and the LED lamp is fixedly arranged on the top surface of the sliding disk.

[0012] As a preferred embodiment of the plastic packaging liquid leak detector described in the present invention, the clamping member includes an arc plate, a rotating rod, a torsion spring, an arc clamping block, a guide plate and an annular pad. The arc plates are provided with multiple pieces and are fixedly arranged at the top center of the sliding disk. The rotating rod is provided with multiple pieces and is rotatably arranged between different arc plates. The torsion spring is fixedly arranged at the rotating connection between the rotating rod and the arc plate. The arc clamping block is fixedly arranged at one end of the rotating rod away from the arc plate. The guide plate is fixedly arranged on one side of the rotating rod away from the center of the sliding disk. The annular pad is located on the outside of the arc plate and is fixedly arranged on the top of the sliding disk.

[0013] As a preferred solution of the plastic packaging liquid leakage detector described in the present invention, the switch component includes a spring plate, a spring, a fixed block, an arc groove, a fixed frame, a rotating frame, a central groove, a damping block, a sliding plate, a sliding hole and a follower frame. The spring plate is slidably arranged on the inner side of the arc plate, and the two sides of the spring are respectively fixedly arranged on the bottom of the spring plate and the top of the sliding plate, and the end of the rotating rod close to the sliding plate abuts against the side of the spring plate.

[0014] As a preferred solution of the plastic packaging liquid leakage detector described in the present invention, the fixed blocks are provided in multiple pieces and are fixedly arranged around the bottom of the sliding disk, the arc groove is opened on the side of the fixed block away from the center of the sliding disk, the fixed frame is fixedly arranged at the bottom of the spring pressure plate and corresponds to the number of fixed blocks one by one, the rotating frame is rotatably arranged on the side of the fixed frame, and the end of the rotating frame away from the fixed frame is slidably arranged on the top of the fixed block.

[0015] As a preferred solution of the plastic packaging liquid leakage detector described in the present invention, the central groove is opened in the middle part of the side of the fixed block, the damping block is fixedly arranged on the inner side of the central groove, the sliding plate is located on the inner side of the central groove and is slidably arranged on the side of the damping block, the sliding hole is opened on the side of the sliding plate, and one end of the follower frame is rotatably arranged on the side of the fixed frame, and the other end is slidably arranged on the inner side of the sliding hole.

[0016] The beneficial effects of the present invention are as follows: the plastic packaging liquid leak detector improves and further extends the existing immersion method. When conducting a leak test on plastic bottles, there is no need to immerse the plastic bottles in water, thereby avoiding the cost of drying when leak testing a large number of plastic bottles. The device can realize assembly line operation with a simple implementation method, thereby ensuring production efficiency when conducting a full inspection of plastic bottles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the plastic packaging liquid leakage detector of the present invention.

[0019] Figure 2 This is a component position distribution diagram of the plastic packaging liquid leakage detector of the present invention.

[0020] Figure 3 It is a schematic diagram of the structure of the leak detection component of the present invention.

[0021] Figure 4 It is a schematic diagram of the internal structure of the sealing cover of the present invention.

[0022] Figure 5 It is a half-section view of the sealing cover of the present invention.

[0023] Figure 6 It is a schematic diagram of the internal structure of the fixed tube 1 and the fixed tube 2 of the present invention.

[0024] Figure 7 It is a schematic diagram of the structure of the fixing component of the present invention.

[0025] Figure 8 It is a half-section view of the sliding disk of the present invention.

[0026] Fig. 9 It is a schematic diagram of the switch structure of the present invention.

[0027] Fig.10 It is a schematic diagram of the sliding block structure of the present invention.

[0028] Reference numerals: 100, conveying device; 200, leak detection assembly; 201, sealing member; 201a, support frame; 201b, electric push rod; 201c, sealing cover; 202, inflatable member; 202a, inflating pump; 202b, hose; 202c, expansion cover; 202d, extension tube; 202e, sealing pad; 203, test piece; 203a, fixed tube 1; 203b, fixed tube 2; 203c, conical mouth; 203d, gravity ball; 203e, bubble detector; 300, positioning assembly; 301, moving member; 301a, circular base; 301b, sliding plate; 301c, side plate; 301d, LED lamp; 302, clamping member; 302a, arc plate; 302b, rotating rod; 302c, torsion spring; 302d, arc clamping block; 302e, guide plate; 302f, annular pad; 303, switch member; 303a, spring plate; 303b, spring; 303c, fixed block; 303d, arc groove; 303e, fixed frame; 303f, rotating frame; 303g, center groove; 303h, damping block; 303i, sliding plate; 303j, sliding hole; 303k, follower frame. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1 Reference Figure 1-2 , which is the first embodiment of the present invention, provides a plastic packaging liquid leak detector, comprising: The conveying device 100 is used for conveying plastic bottles in a directional manner; The leak detection assembly 200 is used to check the air tightness of the plastic bottle, and includes a sealing member 201 disposed on the top of the conveying device 100, an inflatable member 202 disposed on the top of the sealing member 201, and a testing member 203 disposed on the side of the sealing member 201; The positioning assembly 300 is used to position the plastic bottle to facilitate subsequent leak detection, and includes a moving member 301 disposed on the top surface of the conveying device 100 , a clamping member 302 disposed on the top of the moving member 301 , and a switch member 303 disposed on the inner side of the moving member 301 .

[0034] In use: When doing a leak test, the plastic bottle is fixed on the surface of the conveying device 100 through the positioning component 300, and the conveying device 100 automatically moves forward with the plastic bottle to the side leakage component, and finally completes the automatic detection of the air tightness of the plastic bottle.

[0035] Example 2 Reference Figure 3 to Figure 6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the sealing member 201 includes a support frame 201a, an electric push rod 201b and a sealing cover 201c. The support frame 201a is fixedly arranged on the top of the conveying device 100, and the electric push rod 201b is provided with a pair of electric push rods 201b that are symmetrically arranged on the inner top of the support frame 201a. The sealing cover 201c is respectively fixedly arranged on the output ends of different electric push rods 201b through ear plates on both sides.

[0036] The inflatable component 202 includes an air pump 202a, a hose 202b, an outward expansion cover 202c, an extension tube 202d and a sealing gasket 202e. The air pump 202a is fixedly arranged on the top of the support frame 201a, the hose 202b is connected to the air outlet of the air pump 202a, and the outward expansion cover 202c is fixedly arranged at the center of the inner top of the sealing cover 201c.

[0037] The extension tube 202d is located at the center of the expansion cover 202c and is connected to the inner top of the sealing cover 201c. The sealing gasket 202e is supported by rubber and adhered to the side of the extension tube 202d. The end of the hose 202b away from the air pump 202a passes through the top of the support frame 201a and is connected to the extension tube 202d.

[0038] The test piece 203 includes a fixed tube 1 203a, a fixed tube 203b, a tapered mouth 203c, a gravity ball 203d and a bubble detector 203e. The fixed tube 1 203a is connected to the side of the sealing cover 201c, the fixed tube 203b is sleeved and fixedly arranged on the end of the fixed tube 1 203a, the tapered mouth 203c is opened at the end of the fixed tube away from the sealing cover 201c, the gravity ball 203d abuts against the tapered surface of the tapered mouth 203c, and the bubble detector 203e is clamped on the side of the concave bend of the fixed tube, wherein the interior of the concave bend of the fixed tube 203b is filled with distilled water, and the end of the fixed tube 1 203a away from the sealing cover 201c is immersed in the distilled water.

[0039] Among them, the bubble detector 203e is an ultrasonic bubble sensor, and its working principle is based on the propagation characteristics of ultrasonic waves in liquids. The ultrasonic bubble sensor uses an active piezoelectric element as a transmitter to generate high-frequency sound waves. This sound wave first passes through the sensor wall and then propagates into the pipe in contact with the sensor wall. The sound wave then passes through the pipe filled with liquid and reaches the sensor wall opposite the pipe, and is received by a passive piezoelectric element on the other side. When there are bubbles in the liquid, the ultrasonic wave will be reflected and scattered on the surface of the bubble, thereby affecting the ultrasonic signal received by the sensor. The sensor will process the signal and calculate the reflection and scattering of the bubble to obtain the bubble concentration in the liquid.

[0040] The remaining structures are the same as those of Example 1.

[0041] Example 3 Reference Figure 7 to Figure 10 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the moving member 301 includes a circular base 301a, a sliding plate 301b, a side plate 301c and an LED lamp 301d. The circular base 301a is fixedly arranged on the top of the conveying device 100, an inner groove is opened on the inner side of the circular base 301a, the sliding plate 301b is located on the inner side of the circular base 301a, the side plate 301c is fixedly arranged on the side of the sliding plate 301b and partially extends to the inner side of the inner groove, the sliding plate 301b is slidably arranged on the inner side of the circular base 301a through the side plate 301c, and the LED lamp 301d is fixedly arranged on the top surface of the sliding plate 301b.

[0042] The sliding gap between the sliding plate 301b and the circular base 301a is very small, and the sliding resistance is relatively large, so the sliding plate 301b will not move easily without external force, thereby ensuring the accuracy of the position of the plastic bottle.

[0043] The clamping member 302 includes an arc plate 302a, a rotating rod 302b, a torsion spring 302c, an arc clamp block 302d, a guide plate 302e and an annular pad 302f. The arc plate 302a is provided with multiple pieces and is fixedly set at the top center of the sliding disk 301b. The rotating rod 302b is provided with multiple pieces and is rotatably set between different arc plates 302a. The torsion spring 302c is fixedly set at the rotating connection between the rotating rod 302b and the arc plate 302a. The arc clamp block 302d is fixedly set at one end of the rotating rod 302b away from the arc plate 302a. The guide plate 302e is fixedly set on one side of the rotating rod 302b away from the center of the sliding disk 301b. The annular pad 302f is located on the outside of the arc plate 302a and is fixedly set on the top of the sliding disk 301b.

[0044] The switch member 303 includes a spring plate 303a, a spring 303b, a fixed block 303c, an arc groove 303d, a fixed frame 303e, a rotating frame 303f, a central groove 303g, a damping block 303h, a sliding plate 303i, a sliding hole 303j and a follower frame 303k. The spring plate 303a is slidably set on the inner side of the arc plate 302a, and the two sides of the spring 303b are respectively fixed on the bottom of the spring plate 303a and the top of the sliding disk 301b, and the end of the rotating rod 302b close to the sliding disk 301b abuts against the side of the spring plate 303a.

[0045] There are multiple fixed blocks 303c and they are fixedly arranged around the bottom of the sliding disk 301b. The arc groove 303d is opened on the side of the fixed block 303c away from the center of the sliding disk 301b. The fixed frame 303e is fixedly arranged at the bottom of the spring plate 303a and corresponds to the number of the fixed blocks 303c one by one. The rotating frame 303f is rotatably arranged on the side of the fixed frame 303e, and the end of the rotating frame 303f away from the fixed frame 303e is slidably arranged on the top of the fixed block 303c.

[0046] The center groove 303g is opened in the middle part of the side of the fixed block 303c, the damping block 303h is fixedly set on the inner side of the center groove 303g, the sliding plate 303i is located on the inner side of the center groove 303g and is slidably set on the side of the damping block 303h, the sliding hole 303j is opened on the side of the sliding plate 303i, and one end of the follower frame 303k is rotatably set on the side of the fixed frame 303e, and the other end is slidably set on the inner side of the sliding hole 303j.

[0047] In use: When testing a plastic bottle, the blown plastic bottle can be placed in the space surrounded by the arc plate 302a manually or by using a mechanical arm, and the plastic is pressed, and the spring plate 303a is squeezed by the plastic bottle and slides downward. In this process, the rotating frame 303f slides along the top of the fixed block 303c and falls from the top of the fixed block 303c to the side of the fixed block 303c, and the follower frame 303k also slides on the inner side of the sliding hole 303j toward one side of the fixed block 303c. When the spring plate 303a slides down a certain distance, the side of the spring plate 303a collides with the side of the rotating rod 302b, so that the arc clamping block 302d of the rotating rod 302b rotates toward the plastic bottle and finally abuts against the side of the plastic bottle.

[0048] When the arc-shaped clamping block 302d abuts against the side of the plastic bottle and the external force applied to the plastic bottle is removed, the spring plate 303a should be reset under the action of the spring 303b. However, when the rotating frame 303f slides on the side of the fixed block 303c, it will be stuck in the inside of the arc-shaped groove 303d, thereby preventing the spring plate 303a from sliding up, and the side of the rotating rod 302b cannot rotate due to the squeezing of the spring plate 303a, thereby fixing the plastic bottle. At this time, the plastic bottle is in the middle position of the sliding plate 301b.

[0049] The above process is mainly to fix and position the plastic bottle. This is because it is necessary to ensure that the position of the plastic bottle remains unchanged during the leak test, so that the device can be accurately enough to cover the sealing cover 201c on the outside of the plastic bottle.

[0050] After the leak detection is completed, the tested plastic bottle needs to be removed, and the plastic bottle is pressed down again using a mechanical arm or manually. During the sliding of the spring plate 303a, the rotating frame 303f slides out of the arc groove 303d, and the follower frame 303k abuts against the inner side of the sliding hole 303j and moves the sliding block part of the distance between the damping block 303h, and finally blocks the entire central groove 303g and slightly exceeds the side of the fixed block 303c, and then the external force applied to the plastic bottle is removed, and the spring plate 303a is moved. 3a is reset under the action of spring 303b, and the rotating frame 303f is driven by the spring plate 303a to slide upward, but cannot slide into the arc groove 303d due to the obstruction of the sliding block (the sliding block is difficult to move due to the friction of the damping block 303h), and cannot block the reset of the spring plate 303a. The follower frame 303k slides to a certain height on the spring plate 303a and then abuts against the other end of the sliding hole 303j, and pulls the sliding block to its original position after the spring plate 303a is completely reset.

[0051] The above is the process of fixing and removing the plastic bottle, and the specific leak detection process is: when the plastic bottle is transported to the bottom of the sealing cover 201c by the conveying device 100, the conveyor belt stops, and the electric push rod 201b drives the entire sealing cover 201c to move downward and gradually cover the plastic bottle. In the process of the sealing cover 201c moving downward, the inner side of the sealing cover 201c contacts the guide plate 302e. If the conveying device 100 itself is offset during the movement, causing the sealing cover 201c and the plastic bottle to be slightly misaligned, the inner side of the sealing cover 201c squeezes the guide plate 302e, thereby causing the entire sliding plate 301b to slide on the inner side of the circular base 301a, thereby correcting the position of the plastic bottle.

[0052] After the sealing cover 201c slides to the inside of the annular pad 302f, the bottom of the sealing cover 201c is sealed, the outward expansion cover 202c covers the bottle mouth of the plastic bottle, the sealing pad 202e seals the bottle mouth of the plastic bottle, and the extension tube 202d extends to the inside of the plastic bottle. Then the air pump 202a is turned on, and the air pump 202a injects air into the inside of the plastic bottle through the hose 202b and the extension tube 202d. If the bottle body of the plastic bottle is not airtight enough, the air flow inside it will overflow through the damaged part and escape to the outside along the fixed tube 1 203a. When this part of the air flow flows into the distilled water inside the fixed tube 2 203b through the fixed tube 1 203a, dense bubbles will be generated in the distilled water. At this time, the bubble detector 203e will detect the bubbles, and the LED light 301d next to the plastic bottle where the bubbles are detected will light up, thereby marking the plastic bottle with insufficient airtightness. During the inspection, multiple leak detection components 200 can be used to inspect multiple plastic bottles simultaneously to obtain faster inspection efficiency.

[0053] It is worth noting that under the action of the gravity ball 203d, the pressure of the air flow must be higher than a certain value to allow ventilation of the fixed tube 1 203a and the fixed tube 2 203b. If the plastic bottle is intact, the air flow of the air pump 202a will cause the plastic bottle to expand to a certain extent, which will also cause a small amount of air flow to be squeezed from the sealing cover 201c to the inside of the fixed tube 1 203a and the fixed tube 2 203b. However, since the pressure of this part of the air flow is relatively small, it cannot break through the obstruction of the gravity ball 203d, and therefore cannot make the distilled water produce bubbles of sufficient concentration, and will not cause the bubble detector 203e to react.

[0054] The remaining structure is the same as that of Example 2.

[0055] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0056] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0057] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A plastic packaging liquid leak detector, characterized in that: include, A conveying device (100) for conveying plastic bottles in a directional manner; A leak detection assembly (200) is used to test the air tightness of a plastic bottle, comprising a sealing member (201) disposed on the top of a conveying device (100), an inflating member (202) disposed on the top of the sealing member (201), and a testing member (203) disposed on the side of the sealing member (201); The positioning assembly (300) is used to position the plastic bottle to facilitate subsequent leak detection, and comprises a moving member (301) disposed on the top surface of the conveying device (100), a clamping member (302) disposed on the top of the moving member (301), and a switch member (303) disposed on the inner side of the moving member (301).

2. The plastic packaging liquid leak detector according to claim 1, characterized in that: The sealing member (201) comprises a support frame (201a), an electric push rod (201b) and a sealing cover (201c); the support frame (201a) is fixedly arranged on the top of the conveying device (100); the electric push rod (201b) is provided with a pair of push rods symmetrically arranged on the inner top of the support frame (201a); and the sealing cover (201c) is fixedly arranged on the output ends of different electric push rods (201b) through ear plates on both sides.

3. The plastic packaging liquid leak detector according to claim 2, characterized in that: The inflatable member (202) comprises an air pump (202a), a hose (202b), an external expansion cover (202c), an extension tube (202d) and a sealing pad (202e); the air pump (202a) is fixedly arranged on the top of the support frame (201a); the hose (202b) is connected to the air outlet of the air pump (202a); and the external expansion cover (202c) is fixedly arranged at the center of the top of the inner side of the sealing cover (201c).

4. The plastic packaging liquid leak detector according to claim 3, characterized in that: The extension tube (202d) is located at the center of the expansion cover (202c) and is connected to the inner top of the sealing cover (201c); the sealing pad (202e) is supported by rubber and adhered to the side of the extension tube (202d); and the end of the hose (202b) away from the air pump (202a) passes through the top of the support frame (201a) and is connected to the extension tube (202d).

5. The plastic packaging liquid leak detector according to claim 4, characterized in that: The test piece (203) comprises a fixed tube 1 (203a), a fixed tube 2 (203b), a conical mouth (203c), a gravity ball (203d) and a bubble detector (203e); the fixed tube 1 (203a) is connected to the side of the sealing cover (201c); the fixed tube 2 (203b) is sleeved and fixedly arranged on the end of the fixed tube 1 (203a); the conical mouth (203c) is opened at one end of the fixed tube away from the sealing cover (201c); the gravity ball (203d) abuts against the conical surface of the conical mouth (203c); and the bubble detector (203e) is clamped on the side of the concave bend of the fixed tube; wherein the interior of the concave bend of the fixed tube 2 (203b) is filled with distilled water, and the end of the fixed tube 1 (203a) away from the sealing cover (201c) is immersed in the distilled water.

6. The plastic packaging liquid leak detector according to claim 5, characterized in that: The moving member (301) comprises a circular base (301a), a sliding plate (301b), a side plate (301c) and an LED lamp (301d); the circular base (301a) is fixedly arranged on the top of the conveying device (100); an inner groove is provided on the inner side of the circular base (301a); the sliding plate (301b) is located on the inner side of the circular base (301a); the side plate (301c) is fixedly arranged on the side of the sliding plate (301b) and partially extends to the inner side of the inner groove; the sliding plate (301b) is slidably arranged on the inner side of the circular base (301a) through the side plate (301c); and the LED lamp (301d) is fixedly arranged on the top surface of the sliding plate (301b).

7. The plastic packaging liquid leak detector according to claim 6, characterized in that: The clamping member (302) comprises an arc-shaped plate (302a), a rotating rod (302b), a torsion spring (302c), an arc-shaped clamping block (302d), a guide plate (302e) and an annular pad (302f); the arc-shaped plates (302a) are provided with a plurality of pieces and are fixedly arranged at the top center of the sliding plate (301b); the rotating rod (302b) is provided with a plurality of pieces and is rotatably arranged between different arc-shaped plates (302a); the torsion spring (302c) is fixedly arranged at the top center of the sliding plate (301b); The arc-shaped clamping block (302d) is fixedly arranged at the rotation connection between the rotating rod (302b) and the arc-shaped plate (302a), and the guide plate (302e) is fixedly arranged at one side of the rotating rod (302b) away from the center of the sliding plate (301b). The annular pad (302f) is located outside the arc-shaped plate (302a) and is fixedly arranged on the top of the sliding plate (301b).

8. The plastic packaging liquid leak detector according to claim 7, characterized in that: The switch member (303) comprises a spring plate (303a), a spring (303b), a fixed block (303c), an arc groove (303d), a fixed frame (303e), a rotating frame (303f), a central groove (303g), a damping block (303h), a sliding plate (303i), a sliding hole (303j) and a follower frame (303k); the spring plate (303a) is slidably arranged on the inner side of the arc plate (302a); two sides of the spring (303b) are respectively fixedly arranged on the bottom of the spring plate (303a) and the top of the sliding plate (301b); and one end of the rotating rod (302b) close to the sliding plate (301b) abuts against the side of the spring plate (303a).

9. The plastic packaging liquid leak detector according to claim 8, characterized in that: The fixed blocks (303c) are provided in multiple pieces and are fixedly arranged around the bottom of the sliding disk (301b); the arc groove (303d) is opened on a side of the fixed block (303c) away from the center of the sliding disk (301b); the fixed frame (303e) is fixedly arranged at the bottom of the spring plate (303a) and corresponds to the number of the fixed blocks (303c) one by one; the rotating frame (303f) is rotatably arranged on the side of the fixed frame (303e); and one end of the rotating frame (303f) away from the fixed frame (303e) is slidably arranged on the top of the fixed block (303c).

10. The plastic packaging liquid leak detector according to claim 9, characterized in that: The central groove (303g) is provided in the middle part of the side of the fixed block (303c); the damping block (303h) is fixedly arranged on the inner side of the central groove (303g); the sliding plate (303i) is located on the inner side of the central groove (303g) and is slidably arranged on the side of the damping block (303h); the sliding hole (303j) is provided on the side of the sliding plate (303i); one end of the follower frame (303k) is rotatably arranged on the side of the fixed frame (303e) and the other end is slidably arranged on the inner side of the sliding hole (303j).

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