Plastic bottle air leakage detection device

Abstract

The utility model discloses an air leakage detection device for a plastic bottle. The air leakage detection device comprises an upper platform and a lower platform, an ejection mechanism is arranged on the lower platform, a fixed sleeve is fixedly arranged at the working end of the ejection mechanism, the inner diameter of the fixed sleeve is matched with the outer diameter of a plastic bottle, a pressure sensor is fixedly arranged on the inner wall of the fixed sleeve, and a controller electrically connected with the pressure sensor is further arranged on the lower platform; a sealing rubber head is fixedly arranged on the face, facing the fixing sleeve, of the upper platform and made of pad printing silica gel, an air passing hole is formed in the sealing rubber head, the diameter of the bottom of the sealing rubber head is larger than that of a bottle opening of a plastic bottle, and the size of the air passing hole is smaller than that of the bottle opening of the plastic bottle. The upper platform is further provided with an inflator pump, the air outlet end of the inflator pump is connected with an air pipe, and the end, away from the inflator pump, of the air pipe extends into the air passing hole. The plastic bottle can be fixed, sealing can be achieved, and threads of a bottle opening cannot be damaged; the air leakage detector is suitable for the plastic bottle processing industry and is used for detecting whether the plastic bottle leaks air.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of plastic bottle processing and manufacturing, and particularly relates to a plastic bottle air leakage detection device. BACKGROUND

[0002] Food packaging is diverse, and the most common packaging is a plastic bottle. Plastic bottles are mostly used for storing liquids when used for packaging. If a plastic bottle leaks, the internal liquid will leak. Therefore, the air leakage detection link after plastic bottle production is crucial.

[0003] Patent No. CN214843865U discloses a plastic bottle air leakage detection device for food packaging. The bottle opening is screwed into the threaded hole, and then the lead screw is rotated to drive the driving plate to slide downward. The driving plate will pull the piston to slide inside the cylinder, and then the air inside the bottle will be sucked into the cylinder. At this time, the pressure sensor will detect the pulling force of the piston. After waiting for a period of time, if the value detected by the pressure sensor does not change, then the corresponding plastic bottle has good sealing performance.

[0004] However, the above-mentioned patent needs to rotate and screw the plastic bottle opening into the threaded hole, which is complicated to operate. After the air leakage detection is completed, the plastic bottle needs to be rotated and screwed down again. Multiple screwing will damage the threads of the bottle opening, making it difficult to seal the plastic bottle during later use. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a plastic bottle air leakage detection device to solve the problem of damage to the threads of the bottle opening caused by screwing the plastic bottle in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model employs the following technical solutions:

[0007] A plastic bottle air leakage detection device, comprising an upper platform and a lower platform, a support column fixedly arranged between the upper platform and the lower platform; an ejection mechanism is arranged on the lower platform, and a fixed sleeve is fixedly arranged at the working end of the ejection mechanism; the inner diameter of the fixed sleeve is matched with the outer diameter of the plastic bottle; a pressure sensor is fixedly arranged on the inner wall of the fixed sleeve; a controller electrically connected with the pressure sensor is further arranged on the lower platform; a sealing rubber head is fixedly arranged on the side of the upper platform facing the fixed sleeve; the sealing rubber head is made of pad printing silicone; an air passage is arranged on the sealing rubber head corresponding to the position of the fixed sleeve; the diameter of the bottom of the sealing rubber head is larger than the diameter of the bottle opening of the plastic bottle; the size of the air passage is smaller than the diameter of the bottle opening of the plastic bottle; a gas pump is further arranged on the upper platform; a gas pipe is connected to the gas outlet end of the gas pump; one end of the gas pipe away from the gas pump extends into the air passage; and the gas pipe penetrates through the air passage.

[0008] As a limitation of the utility model: the ejection mechanism comprises a hydraulic cylinder and a hydraulic station, the hydraulic cylinder and the hydraulic station are connected through a hydraulic oil pipe, and the hydraulic rod of the hydraulic cylinder is fixedly connected with the fixing sleeve.

[0009] As a further limitation of the utility model: the hydraulic cylinder is provided in plurality, the plurality of hydraulic cylinders are arranged on the lower platform in interval, the number of the sealing rubber heads is equal to that of the hydraulic cylinders, the air outlet end of the air pump is connected with the air passing hole on each sealing rubber head through the air pipe, and the hydraulic station is connected with the plurality of hydraulic cylinders through the hydraulic oil pipe.

[0010] As a further limitation of the utility model: the ejection mechanism further comprises a synchronization valve, the hydraulic station and the plurality of hydraulic cylinders are communicated through the synchronization valve, and the hydraulic oil pipe is arranged between the synchronization valve and the hydraulic cylinder.

[0011] As another limitation of the utility model: a reinforcing rod is fixedly arranged between any two adjacent fixing sleeves.

[0012] As a further limitation of the utility model: the upper platform is further provided with an air inlet disc, the air pipe comprises a first air pipe and a second air pipe, the first air pipe is arranged between the air pump and the air inlet disc, and the second air pipe is arranged between the air inlet disc and the sealing rubber head.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The utility model discloses a plastic bottle sealing device, which comprises an upper platform and a lower platform, the lower platform is provided with an ejection mechanism, the working end of the ejection mechanism is fixedly provided with a fixing sleeve, one side of the upper platform towards the fixing sleeve is fixedly provided with a sealing rubber head, the sealing rubber head is made of pad printing silica gel, the sealing rubber head is provided with an air passing hole at the position corresponding to the fixing sleeve, the diameter of the bottom of the sealing rubber head is greater than that of the bottle mouth of the plastic bottle, and the size of the air passing hole is smaller than that of the bottle mouth of the plastic bottle.

[0015] In conclusion, the utility model can fix the plastic bottle and realize sealing, and the bottle mouth thread is not damaged. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model (the controller is not shown).

[0018] Figure 2 This is a schematic diagram of the structure of the fixing sleeve in an embodiment of the present utility model;

[0019] Figure 3 This is a structural schematic diagram of an embodiment of the present invention from another perspective (the controller, synchronizing valve, and hydraulic oil pipe are not shown).

[0020] In the diagram: 1-Lower platform, 2-Upper platform, 3-Hydraulic station, 4-Synchronization valve, 5-Hydraulic oil pipe, 6-Hydraulic cylinder, 61-Hydraulic rod, 7-Fixing sleeve, 8-Pressure sensor, 9-Reinforcing rod, 10-Air pump, 11-Air inlet plate, 12-First air pipe, 13-Second air pipe, 14-Sealing head, 141-Air passage hole, 15-Support column. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and do not constitute a limitation thereof.

[0022] like Figures 1-3 As shown, this embodiment includes an upper platform 2, a lower platform 1, an ejection mechanism, a fixing sleeve 7, and an air pump 10; the fixing sleeve 7 is used to fix the plastic bottle, the ejection mechanism lifts the plastic bottle so that the bottle mouth is pressed against the sealing head 14, the sealing head 14 deforms to seal the bottle mouth, and the air pump 10 inflates the plastic bottle with air. By observing the reading of the pressure sensor 8, it can be determined whether the plastic bottle is leaking air.

[0023] I. Ejection mechanism;

[0024] The ejection mechanism is fixed to the lower platform 1. In this embodiment, the ejection mechanism includes hydraulic cylinders 6 and a hydraulic station 3, where the hydraulic station 3 is a conventional hydraulic station. To achieve batch testing, multiple hydraulic cylinders 6 are provided, and these multiple hydraulic cylinders 6 are fixed to the lower platform 1 at intervals, such as... Figure 1 , 3 As shown, in this embodiment, the number of hydraulic cylinders 6 is set to four, and the hydraulic station 3 and the four hydraulic cylinders 6 are all connected by hydraulic oil pipes 5. Of course, the number of hydraulic cylinders 6 can be increased or decreased according to actual applications to achieve the purpose of inspecting multiple plastic bottles at one time.

[0025] To ensure the synchronous extension and retraction of the hydraulic rods 61 in the four hydraulic cylinders 6, thereby improving the stability of the device during use, such as...Figure 1 As shown, the ejection mechanism further comprises a synchronization valve 4, the hydraulic station 3 is communicated with the four hydraulic cylinders 6 through the synchronization valve 4, and the four hydraulic cylinders 6 are connected with the synchronization valve 4 through hydraulic oil pipes 5. Specifically, the synchronization valve 4 adopts an existing one-to-four synchronization valve 4, and the total number is two. The oil outlet and the oil inlet of the hydraulic station 3 are respectively communicated with one synchronization valve 4. One of the synchronization valves 4 is respectively communicated with the oil inlets of the four hydraulic cylinders 6 through the hydraulic oil pipes 5, and the other synchronization valve 4 is respectively communicated with the oil outlets of the four hydraulic cylinders 6 through the hydraulic oil pipes 5. Since the structure, connection relationship and working principle of the synchronization valve 4, the hydraulic station 3 and the hydraulic cylinder 6 are prior art, this embodiment will not be described in detail.

[0026] II. The fixed sleeve 7;

[0027] As shown in Figure 1 , 2 , the fixed sleeve 7 is fixedly arranged at the working end of the ejection mechanism. In this embodiment, the working end of the ejection mechanism is the extension end of the hydraulic rod 61, that is, the hydraulic rod 61 is fixedly connected with the fixed sleeve 7. In this embodiment, the number of the fixed sleeve 7 is also four. The inner diameter of the fixed sleeve 7 is matched with the outer diameter of the plastic bottle. The inner wall of the fixed sleeve 7 is fixedly provided with a pressure sensor 8. Here, the matching means that the inner diameter of the fixed sleeve 7 is slightly larger than the outer diameter of the plastic bottle. When the plastic bottle is put in, the outer wall of the plastic bottle just contacts the pressure sensor 8. The lower platform 1 is also provided with a controller electrically connected with the pressure sensor 8. The connection relationship between the pressure sensor 8 and the controller is prior art, and this embodiment will not be described in detail. Figure 1 , 3 The controller is not shown in this embodiment.

[0028] Further, a reinforcing rod 9 is fixedly arranged between any two adjacent fixed sleeves 7. As shown in Figure 1 , 3 , the number of the reinforcing rod 9 is four in this embodiment. The reinforcing rod 9 can connect the four fixed sleeves 7 together. When the hydraulic cylinder 6 is lifted upward, the reinforcing rod 9 can constrain the fixed sleeve 7 to prevent the fixed sleeve 7 from shaking left and right while being lifted upward.

[0029] III. The upper platform 2;

[0030] As shown in Figure 1 , 3 , a support column 15 is fixedly arranged between the upper platform 2 and the lower platform 1 to support the upper platform 2. The side of the upper platform 2 facing the fixed sleeve 7 is fixedly provided with a sealing rubber head 14. The number of the sealing rubber head 14 is equal to the number of the hydraulic cylinder 6, which is four in this embodiment. The sealing rubber head 14 is made of pad printing silicone rubber and is very soft. The diameter of the bottom of the sealing rubber head 14 is larger than the diameter of the bottle mouth of the plastic bottle. When the plastic bottle is lifted upward, the bottle mouth can be sunk into the sealing rubber head 14. At this time, the sealing rubber head 14 is deformed and can completely cover the bottle mouth to achieve sealing.

[0031] As shown in Figure 1 , 3 , the sealing head 14 is provided with a gas passing hole 141 corresponding to the position of the fixing sleeve 7, which penetrates the upper and lower surfaces of the sealing head 14. The upper platform 2 is also provided with an air pump 10, the air outlet end of which is connected with an air pipe, the end of which away from the air pump 10 extends into the gas passing hole 141. In operation, the air pump 10 fills air into the gas passing hole 141 through the air pipe. In order to ensure uniform air filling into the four sealing heads 14, the upper platform 2 is fixed with an air inlet disc 11, and the air pipe includes a first air pipe 12 and a second air pipe 13. The first air pipe 12 is arranged between the air pump 10 and the air inlet disc 11, and the second air pipe 13 includes four pipes, each of which is arranged between the air inlet disc 11 and the sealing head 14. The second air pipe 13 penetrates the upper platform 2 and is fixedly connected with the upper platform 2. The second air pipe 13 extends into the gas passing hole 141 after penetrating the upper platform 2, and the second air pipe 13 penetrates the gas passing hole 141, that is, the bottom end of the second air pipe 13 is flush with the bottom end of the sealing head 14 or the bottom end of the second air pipe 13 extends out of the bottom end of the sealing head 14, Figure 3 The second air pipe 13 is not shown in the middle. Of course, if only one sealing head 14 and one fixing sleeve 7 are arranged, the air inlet disc 11 is not needed, and the air outlet end of the air pump 10 is directly connected with the gas passing hole 141 on the sealing head 14 through the air pipe.

[0032] It should be noted that the size of the gas passing hole 141 is smaller than the diameter of the bottle mouth of the plastic bottle. When the plastic bottle moves upward to the position where the bottle mouth contacts the sealing head 14, the bottle mouth can completely cover the gas passing hole 141 to ensure that the air can completely enter the plastic bottle during air filling.

[0033] When the embodiment is used, one plastic bottle is placed in each of the four fixing sleeves 7 with the bottle mouth upward. The hydraulic cylinder 6 is operated to synchronously push out the four hydraulic rods 61 until the bottle mouth of the plastic bottle abuts against the sealing head 14. Since the sealing head 14 is very soft and deforms, the hydraulic rod 61 is continuously pushed upward until the bottle mouth of the plastic bottle abuts against the sealing head 14 and the sealing head 14 abuts against the upper platform 2. At this time, the sealing head 14 completely wraps the bottle mouth to form a sealed state, and the structure does not damage the threads of the bottle mouth. The gas passing hole 141 is located in the bottle mouth. Then the air pump 10 is started, and the air enters the plastic bottle through the first air pipe 12, the air inlet disc 11, the second air pipe 13 and the gas passing hole 141. After air filling, the plastic bottle expands, and the outer wall of the plastic bottle presses the pressure sensor 8, which displays the number. After a period of observation, if the number does not change, it means that the plastic bottle has good sealing performance, and if the number decreases, it means that the plastic bottle leaks.

[0034] It should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the above embodiments of the present application are described in detail, for those skilled in the art, it still can be modified to the technical solutions recorded in the above examples, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A plastic bottle leak detection apparatus, characterized by, The device comprises an upper platform and a lower platform, and a supporting column is fixed between the upper platform and the lower platform; an ejection mechanism is arranged on the lower platform, and a fixed sleeve is fixed at the working end of the ejection mechanism; the inner diameter of the fixed sleeve is matched with the outer diameter of the plastic bottle; a pressure sensor is fixed on the inner wall of the fixed sleeve; a controller electrically connected with the pressure sensor is further arranged on the lower platform; a sealing rubber head is fixed on the side of the upper platform facing the fixed sleeve; the sealing rubber head is made of a pad printing silicone rubber; a gas passing hole is arranged on the sealing rubber head corresponding to the position of the fixed sleeve; the diameter of the bottom of the sealing rubber head is larger than the diameter of the bottle mouth of the plastic bottle; the size of the gas passing hole is smaller than the diameter of the bottle mouth of the plastic bottle; an air pump is further arranged on the upper platform; an air pipe is connected to the air outlet end of the air pump; the end of the air pipe away from the air pump is inserted into the gas passing hole; and the air pipe penetrates through the gas passing hole.

2. The plastic bottle leak detection apparatus of claim 1, wherein, The ejection mechanism comprises a hydraulic cylinder and a hydraulic station; the hydraulic cylinder and the hydraulic station are connected through a hydraulic oil pipe; and the hydraulic rod of the hydraulic cylinder is fixedly connected with the fixed sleeve.

3. The plastic bottle leak detection apparatus of claim 2, wherein, A plurality of hydraulic cylinders are arranged on the lower platform in a spaced manner; the number of the sealing rubber heads is equal to the number of the hydraulic cylinders; the air outlet end of the air pump is connected with the gas passing hole on each sealing rubber head through the air pipe; and the hydraulic station is connected with the plurality of hydraulic cylinders through the hydraulic oil pipe.

4. The plastic bottle leak detection apparatus of claim 3, wherein, The ejection mechanism further comprises a synchronization valve; the hydraulic station and the plurality of hydraulic cylinders are communicated through the synchronization valve; and the hydraulic oil pipe is arranged between the synchronization valve and the hydraulic cylinder.

5. The plastic bottle leak detection apparatus of any one of claims 1-4, wherein, A reinforcing rod is fixed between any two adjacent fixed sleeves.

6. The plastic bottle leak detection apparatus of claim 5, wherein, An air inlet disc is further arranged on the upper platform; the air pipe comprises a first air pipe and a second air pipe; the first air pipe is arranged between the air pump and the air inlet disc; and the second air pipe is arranged between the air inlet disc and the sealing rubber head.

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