Novel leak detection head device

Abstract

The utility model discloses a novel leak hunting head device, which comprises a crimping part used for being connected with a lifting cylinder in a leak hunting system, and the bottom of the crimping part is also provided with a groove; the blocking part is internally provided with a first gas flow channel communicated with the outside, and the side face of the blocking part is further provided with a gas inlet and a gas outlet which are communicated with the first gas flow channel; one end of the supporting rod is fixedly connected to the plugging part, and the other end of the supporting rod extends in the direction away from the plugging part and is inserted into the groove; the plurality of connecting rods are used for connecting the crimping part and the plugging part and can relatively deflect after being connected; and the flexible gasket is arranged on the plugging part, a second gas flow channel is formed in the flexible gasket, and the second gas flow channel communicates with the first gas flow channel.

Description

Technical Field

[0001] This utility model relates to the field of leak detection system technology, and in particular to the field of airtightness detection technology, specifically to a novel leak detection head device. Background Technology

[0002] Plastic bottles are made from plastic materials through blow molding. After molding, the bottles need to be tested for air tightness using a leak detection system to check for leaks. Specifically, the leak detection system pressurizes the bottle to detect leaks. The process begins by sealing the bottle opening with a leak detection head, and then the system pressurizes the bottle by injecting air through the leak detection head.

[0003] However, the existing leak detection head devices have the following structure: Figure 1 As shown, this leak detection head has a spherical steel ball in the center, and a silicone gasket is fixed to the bottom of the leak detection head with glue. During the process of the leak detection head sealing the bottle opening, driven by the lifting cylinder of the leak detection system, it cannot be completely guaranteed that it will not deviate. Therefore, while the spherical steel ball in the leak detection head can be used for top alignment during the sealing process to ensure the sealing effect, it also brings other problems: in actual operation, the spherical steel ball is prone to eccentricity and easy to fall off. If the spherical steel ball in the center of the leak test head falls out, the upper pressing part will inevitably tilt during the sealing process. This will affect the sealing effect of the leak test head on the bottle mouth, resulting in deviations in the airtightness test of the plastic bottle. In addition, the existing leak test head uses a silicone gasket (generally 3.0mm thick) fixed at the bottom with glue. This is used to buffer the leak test head during the sealing process and improve the sealing effect. However, the glue fixing method has the problems of being unstable and having the risk of air leakage. Moreover, it is not convenient to replace the silicone gasket after it is fixed with glue if it is damaged. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in existing leak detection devices by designing a novel leak detection device that solves the aforementioned problems.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] This utility model designs a novel leak detection head device, which includes the following structure:

[0007] A crimping part is used to connect with the lifting cylinder in the leak detection system, and a groove is provided at the bottom of the crimping part;

[0008] The sealing part has a first gas flow channel inside that communicates with the outside, and the side of the sealing part is also provided with an air inlet and an air outlet that communicate with the first gas flow channel.

[0009] A support rod, one end of which is fixedly connected to the sealing part, and the other end extends away from the sealing part and is inserted into the groove;

[0010] A plurality of connecting rods are used to connect the crimping part to the sealing part, and the crimping part can be deflected relative to the sealing part after connection;

[0011] And a flexible gasket, which is disposed on the sealing part, wherein the flexible gasket is provided with a second gas flow channel and the second gas flow channel is connected to the first gas flow channel.

[0012] Furthermore, a novel leak detection head device: the groove is configured as a spherical groove. Specifically, the groove can be configured as a hemispherical structure.

[0013] Furthermore, a novel leak detection head device is provided in which the sealing part and the support rod are integrated.

[0014] Furthermore, a novel leak detection head device is provided: the sealing part has a first surface and a second surface opposite to each other, one end of the support rod is integrally formed with the first surface, and the other end is set as a spherical structure.

[0015] Furthermore, a novel leak detection head device: the first gas flow channel is connected to the second surface.

[0016] Furthermore, a novel leak detection head device is provided: a slot is also provided on the second surface of the sealing part, and the flexible gasket is snapped into the slot.

[0017] Furthermore, a novel leak detection head device: the flexible gasket is a silicone gasket.

[0018] Furthermore, a novel leak detection head device is provided, wherein the sealing part is configured as a cylindrical structure.

[0019] The beneficial effects of this utility model are:

[0020] (1) The present invention provides a spherical groove on the crimping part and sets the end of the support rod as a spherical structure, so that the support rod and the groove can meet the deflection requirements after assembly. That is, it can ensure that the crimping part above the leak tester can achieve the positional alignment function during the sealing of the bottle mouth of the plastic bottle, thereby improving the sealing effect of the leak tester on the bottle mouth. At the same time, the present invention also sets the support rod and the sealing part as an integrated structure, which can avoid the support rod falling from the crimping part and the sealing part (similar to the spherical steel ball falling in the existing leak tester), which would cause the upper crimping part to tilt. If the upper crimping part tilts significantly during the sealing of the bottle mouth by the leak tester, it will affect the sealing effect of the leak tester on the bottle mouth, thus causing a deviation in the airtightness test of the plastic bottle. Therefore, through the optimized design of the leak detection head device structure, this utility model can not only achieve self-positioning during the bottle opening sealing process, but also avoid the problem of the spherical steel ball falling off in existing leak detection head devices. This reduces the problem of deviation in the airtightness test results of plastic bottles caused by the poor sealing effect of the leak detection head device on the bottle opening, and helps to improve the accuracy of leak detection.

[0021] (2) The leak detection head device of this utility model completes the connection between the flexible gasket and the sealing part by setting a slot on the sealing part and snapping the flexible gasket into the slot. No glue is needed for bonding, which makes it convenient to replace the flexible gasket after it is damaged. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional structural diagram of an existing leak detection device;

[0024] Figure 2 This is a schematic diagram of the structure of the novel leak detection head device provided in Embodiment 1 of this utility model;

[0025] Figure 3 A cross-sectional structural diagram of the novel leak detection head device provided in Embodiment 1 of this utility model;

[0026] Figure 4 This is a cross-sectional structural diagram of the sealing part in Embodiment 1 of this utility model.

[0027] The markings in the diagram are: 1-Crimping part, 2-Sealing part, 3-Support rod, 4-Connecting rod, 5-Flexible gasket, 6-Spherical steel ball, 11-Groove, 21-First gas flow channel, 22-Inlet, 23-Outlet, 24-First surface, 25-Second surface, 26-Slot, 51-Second gas flow channel. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0030] Example 1

[0031] like Figures 2-4 As shown, this embodiment 1 provides a novel leak detection head device, which includes the following structure:

[0032] The crimping part 1 is used to connect with the lifting cylinder in the leak detection system. The bottom of the crimping part 1 is also provided with a spherical groove 11.

[0033] The sealing part 2 is configured as a cylindrical structure. The sealing part 2 has a first surface 24 and a second surface 25 opposite to each other. The interior of the sealing part 2 is provided with a first gas flow channel 21 communicating with the second surface 25. The side of the sealing part 2 is also provided with an air inlet 22 and an air outlet 23 communicating with the first gas flow channel 21. The second surface 25 is also provided with a slot 26.

[0034] The support rod 3 has one end fixedly connected to the sealing part 2 (specifically, it is integrally formed with the first surface 24 of the sealing part 2), and the other end of the support rod 3 is set as a spherical structure and extends in a direction away from the first surface 24 and is inserted into the groove 11 of the spherical structure.

[0035] Several connecting rods 4 are used to connect the crimping part 1 to the sealing part 2. After connection, the crimping part 1 can be deflected relative to the sealing part 2 so that the crimping part 1 can automatically align itself during the process of sealing the bottle mouth by the leak detection device.

[0036] And a flexible gasket 5, which is made of silicone, is snapped into a slot 26 on the second surface 25. The flexible gasket 5 is also provided with a second gas channel 51 that communicates with the first gas channel 21.

[0037] Comparative Example 1

[0038] like Figure 1 As shown, Comparative Example 1 provides a conventional leak detection device, which includes:

[0039] The crimping part 1 is used to connect with the lifting cylinder in the leak detection system. The bottom of the crimping part 1 is also provided with a spherical groove 11.

[0040] The sealing part 2 is configured as a cylindrical structure. The interior of the sealing part 2 is provided with a first gas flow channel 21 communicating with its bottom. The side of the sealing part 2 is also provided with an air inlet 22 and an air outlet 23 communicating with the first gas flow channel 21.

[0041] A spherical steel ball 6 is disposed between the pressing part 1 and the sealing part 2 and is partially located in the groove 11;

[0042] Several connecting rods 4 are used to connect the crimping part 1 to the sealing part 2. After connection, the crimping part 1 can be deflected relative to the sealing part 2 so that the crimping part 1 can automatically align itself during the process of sealing the bottle mouth by the leak detection device.

[0043] And a flexible gasket 5, which is a silicone gasket, is bonded to the bottom of the sealing part 2 with adhesive. The flexible gasket 5 is also provided with a second gas channel 51 that communicates with the first gas channel 21.

[0044] Leak testing process: First, the plastic bottle is transported to the leak testing station. The lifting cylinder in the leak testing system drives the leak testing head device to seal the bottle opening. Then, the air supply device in the leak testing system sequentially pressurizes the inside of the plastic bottle through the air inlet 22, the first gas flow channel 21, and the second gas flow channel 51. After the pressurization is completed, the pressurization stops. After a period of time, the air pressure is detected by the air outlet 23. The air tightness of the plastic bottle is then determined by comparing the inflation pressure with the air pressure detected by the air outlet 23.

[0045] However, during the process of sealing the bottle neck with the leak-detecting head driven by the lifting cylinder, it cannot be completely guaranteed that the leak-detecting head will not deviate during the sealing process. Therefore, Comparative Example 1 uses a spherical steel ball 6 in the leak-detecting head device to align the upper pressing part 1 during the sealing process, thus ensuring the sealing effect. However, in actual use, the spherical steel ball 6 is prone to deviating from the groove 11 and falling between the pressing part 1 and the sealing part 2. Once the spherical steel ball 6 falls, the upper pressing part 1 will inevitably tilt during the sealing process, which will affect the sealing effect of the flexible gasket 5 on the bottle neck. If an airtightness problem is detected in the plastic bottle, the leak-detecting head will be affected. Leakage detection systems often struggle to distinguish between airtightness issues inherent in the plastic bottle itself and those caused by poor sealing of the bottle opening by the leak detector. The former indicates a quality defect in the plastic bottle, rendering it unqualified, while the latter, caused by a poor seal on the leak detector, results in a failed test. This doesn't necessarily mean the bottle itself has an airtightness problem, leading to inaccuracies in airtightness testing. It can cause even qualified bottles to be mistakenly rejected, resulting in the problem of acceptable products being rejected. The root cause lies in the fact that in the leak detector device of Comparative Example 1, the flexible gasket 5 becomes ineffective in sealing the bottle opening after the spherical steel ball 6 falls off, causing an airtightness issue at the bottle opening. Furthermore, the existing leak detector uses glue to fix the flexible gasket 5 at the bottom, which presents problems such as the gasket 5 being unstable, posing a risk of leakage, and making replacement inconvenient if the gasket 5 is damaged. In Embodiment 1, the support rod 3 and the sealing part 2 are integrated into one structure, which can avoid the problem of the support rod 3 falling between the crimping part 1 and the sealing part 2 (similar to the falling of the spherical steel ball in the existing leak detection head device). Therefore, the upper crimping part 1 will not tilt during the sealing process of the bottle mouth, and the sealing effect of the flexible gasket 5 on the bottle mouth will not be affected, and the airtightness test results of the plastic bottle will not be deviated.

[0046] This invention, through optimized design of the leak detection head device structure, not only enables self-alignment during the bottle sealing process, but also avoids the problem of spherical steel balls falling off in existing leak detection head devices (Comparative Example 1). This reduces the deviation in the airtightness test results of plastic bottles caused by poor sealing effect of the leak detection head device, which helps improve the accuracy of leak detection and avoids the accidental rejection of airtight products.

[0047] The above-described preferred embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of this utility model. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A novel leak detection head device, characterized in that, The leak detection head device includes the following structure: A crimping part (1) is used to connect with a lifting cylinder in a leak detection system. The bottom of the crimping part (1) is also provided with a groove (11). The sealing part (2) has a first gas flow channel (21) that communicates with the outside inside. The side of the sealing part (2) is also provided with an air inlet (22) and an air outlet (23) that communicate with the first gas flow channel (21). A support rod (3) has one end fixedly connected to the sealing part (2) and the other end extends away from the sealing part (2) and is inserted into the groove (11); A plurality of connecting rods (4) are used to connect the crimping part (1) to the sealing part (2), and can be deflected relative to each other after connection; And a flexible gasket (5) is disposed on the sealing part (2), the flexible gasket (5) is provided with a second gas flow channel (51), and the second gas flow channel (51) is connected to the first gas flow channel (21).

2. The novel leak detection head device according to claim 1, characterized in that, The groove (11) is configured as a spherical groove.

3. The novel leak detection head device according to claim 1, characterized in that, The sealing part (2) and the support rod (3) are integrated.

4. A novel leak detection head device according to claim 1 or 3, characterized in that, The sealing part (2) has a first surface (24) and a second surface (25) opposite to each other. One end of the support rod (3) is integrally formed with the first surface (24), and the other end is set as a spherical structure.

5. A novel leak detection head device according to claim 4, characterized in that, The first gas flow channel (21) is connected to the second surface (25).

6. A novel leak detection head device according to claim 4, characterized in that, The second surface (25) of the sealing part (2) is also provided with a slot (26), and the flexible gasket (5) is engaged in the slot (26).

7. A novel leak detection head device according to claim 1 or 6, characterized in that, The flexible gasket (5) is a silicone gasket.

8. A novel leak detection head device according to claim 1, characterized in that, The sealing part (2) is configured as a cylindrical structure.

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