Shielding film detection device

Abstract

The present application provides a shielding film detection device, which relates to the technical field of shielding film detection and is used to reduce the cost of detecting the sealing property of the shielding film. The shielding film detection device includes a cover body, an elastic seal, an air suction component, a detection component and a control component, wherein the cover body has a accommodating cavity. The accommodating cavity has an open end and a closed end that are relatively arranged, and the open end is arranged toward the shielding film. The cover body is used to cover the shielding film, and at least part of the welding area to be detected is located within the covering area of ​​the cover body. The elastic seal is arranged on the cover body, and the elastic seal corresponds to the edges around the open end. One end of the air suction component is connected to the accommodating cavity, and is used to generate a negative pressure between the cover body and the shielding film. The detection component is connected to the accommodating cavity, and is used to detect the pressure in the accommodating cavity and generate a pressure signal. The control component is electrically connected to the air suction component, and the control component is used to control the start and stop of the air suction component. The control component is also electrically connected to the detection component, and is used to receive the pressure signal.

Description

Technical Field

[0001] The present application relates to the technical field of shielding film detection, and in particular to a shielding film detection device. Background Art

[0002] Membrane tanks are mainly used for the storage and transportation of liquefied natural gas. They generally have a barrier membrane and an insulation module.

[0003] Conventional methods for testing the sealing properties of shielding membranes typically involve injecting a tracer gas, such as helium, into the insulation module. A testing device equipped with a tracer gas analyzer is then moved within the membrane tank along the welded area of ​​the shielding membrane. If the testing device detects the presence of tracer gas, it is determined that the shielding membrane has a sealing defect.

[0004] However, in the prior art, the cost for detecting the sealing performance of the shielding film is relatively high. Summary of the Invention

[0005] The present application provides a shielding film detection device for reducing the cost of detecting the sealing performance of the shielding film.

[0006] In order to achieve the above-mentioned purpose, the present application provides a shielding film detection device for detecting the sealing of the welding area of ​​the shielding film. The shielding film detection device includes a cover body, an elastic seal, an air suction component, a detection component and a control component, wherein the cover body has a accommodating cavity. The accommodating cavity has an open end and a closed end that are relatively arranged, and the open end is arranged toward the shielding film. The cover body is used to cover the shielding film, and at least part of the welding area to be detected is located in the covering area of ​​the cover body. The elastic seal is arranged on the cover body, and the elastic seal corresponds to the edges of the open end. One end of the air suction component is connected to the accommodating cavity, and is used to generate a negative pressure between the cover body and the shielding film. The detection component is connected to the accommodating cavity, and is used to detect the pressure in the accommodating cavity and generate a pressure signal. The control component is electrically connected to the air suction component, and the control component is used to control the start and stop of the air suction component. The control component is also electrically connected to the detection component, and is used to receive the pressure signal.

[0007] When adopting the above technical solution, after the cover body is placed on the shielding membrane and ensuring that at least part of the welding area to be inspected is located in the covering space of the cover body, the suction component can be started by the control component to perform suction to generate negative pressure between the cover body and the shielding membrane. At the same time, the elastic seal is compressed and the cover body is adsorbed on the shielding membrane.

[0008] At the same time, the control component can start the detection component to detect the pressure in the accommodating cavity and generate a pressure signal. The control component receives the pressure signal and controls the suction component to stop suction when the pressure value detected by the detection component is within a preset range.

[0009] The detection component monitors the pressure within the containment chamber in real time and continuously transmits the pressure signal to the control component. After a certain period of time, if the pressure value detected by the detection component remains within a preset range, it indicates that at least a portion of the weld area to be inspected has good sealing properties and does not have any sealing defects. After a certain period of time, if the pressure value detected by the detection component is less than the minimum value of the preset range, it indicates that at least a portion of the weld area to be inspected has a sealing defect.

[0010] When using the shielding film detection device provided in the present application to detect the welding area to be detected, compared with the existing technology of injecting tracer gas into the insulation module and then moving the detection equipment equipped with a tracer gas analyzer along the welding area of ​​the shielding film, there will be no waste of tracer gas. Moreover, the shielding film detection device provided in the present application has a simple structure and can be recycled and reused, which can reduce the detection cost of the sealing performance of the shielding film.

[0011] In a possible implementation, the elastic sealing member is made of sponge or rubber.

[0012] When adopting the above technical solution, the material of the elastic seal is set to sponge or rubber, so that the elastic seal has excellent elasticity and resilience, and can return to its original shape after compression, thereby ensuring the sealing performance between the cover body and the shielding membrane.

[0013] In a possible implementation, the shielding film detection device further includes a limiting assembly disposed on the shielding film, wherein an end of the limiting assembly away from the shielding film is configured to be in limiting contact with the closed end to apply a force to the cover body toward the shielding film.

[0014] When the above technical solution is adopted, the setting of the limiting component enables the cover to have a force to move closer to the shielding membrane, which can improve the stability of the cover adsorbed on the shielding membrane and ensure the sealing between the cover and the shielding membrane.

[0015] In one possible implementation, the retaining assembly includes a positioning structure, a support rod, and a retaining member. The positioning structure is configured to be positioned on the shielding membrane. The support rod has a first end and a second end disposed opposite each other. The first end is positioned on the positioning structure, and the second end extends away from the shielding membrane. The retaining member is disposed at the second end and is configured to engage the closed end to apply a force to the cover body toward the shielding membrane.

[0016] In a possible implementation, the positioning structure includes a suction cup, which is used to be attached to the shielding film and communicated with an air suction component, which is used to generate negative pressure between the suction cup and the shielding film.

[0017] When the above technical solution is adopted, the positioning structure includes a suction cup, which is connected to the suction component. When the control component controls the suction component to start, negative pressure can be generated between the suction cup and the shielding film, so that the suction cup can be adsorbed on the shielding film.

[0018] The positioning structure includes a suction cup, which generally has a certain degree of flexibility and is not easily affected by the surface of the shielding film. The suction cup can fit closely with the shielding film through deformation to achieve a good positioning effect.

[0019] At the same time, the adsorption force between the suction cup and the shielding film is relatively uniform, which can avoid damage such as scratches and indentations to the shielding film due to excessive local pressure.

[0020] Furthermore, the suction cup installation and removal process is typically quick and easy. Simply place the suction cup on the shielding film and activate the suction assembly to draw out the air between the cup and the film, creating a negative pressure. To remove, simply introduce air into the cup or break the negative pressure to separate it from the film.

[0021] In a possible implementation, the node of the shielding film has two oppositely arranged recessed portions.

[0022] The positioning structure includes a support plate, a positioning block, a sliding block and a driving component, and the first end of the support rod is arranged on the support plate. The positioning block is arranged on the side of the support plate away from the support rod, and the positioning block has a first protrusion that cooperates with the recessed portion. The sliding block is slidably arranged on the side of the support plate away from the support rod, and the sliding block has a second protrusion that cooperates with the recessed portion. The positioning block and the sliding block are arranged on both sides of the flower node relative to each other, and the sliding block can slide relative to the support plate in the direction of approaching and away from the positioning block. The driving component is arranged on the support plate, and the sliding block is arranged at the driving end of the driving component. The driving component is used to drive the sliding block to slide in the direction of approaching and away from the positioning block.

[0023] When the above technical solution is adopted, the first protrusion can extend into the recess and the first protrusion can press against the recess, thereby fixing the positioning block relatively to the flower node. Furthermore, the relative position of the positioning block and the shielding film is fixed.

[0024] The second protrusion can extend into the recessed portion, and the second protrusion can press against the recessed portion, thereby fixing the sliding block relatively to the flower node. Furthermore, the relative position of the sliding block and the shielding film is fixed.

[0025] In a specific implementation, the first protrusion can be inserted into one of the recesses, and the driving component drives the sliding block to slide toward the positioning block, reducing the distance between the sliding block and the positioning block until the second protrusion is inserted into another recess opposite to the first recess, and the first protrusion is pressed against the recess that matches the positioning block, and the second protrusion is pressed against the recess that matches the sliding block. This can fix the relative position of the positioning structure and the flower node, and further fix the relative position between the positioning structure and the shielding film, thereby positioning the limit assembly on the shielding film.

[0026] When the positioning structure needs to be removed from the shielding film, the driving component can be controlled to drive the sliding block to slide away from the positioning block, increasing the distance between the sliding block and the positioning block until the second protrusion is out of the recessed portion. At this time, the positioning structure can be removed from the shielding film.

[0027] In one possible implementation, the drive component includes a support guide block, a sliding shaft, and a drive member. The support guide block is disposed on a side of the support plate away from the support rod. The support guide block is provided with a guide hole, the axis of which extends along the direction of movement of the sliding block. The sliding block is disposed at one end of the sliding shaft, and the other end of the sliding shaft extends through the guide hole. The drive member is disposed on the support guide block, and the end of the sliding shaft away from the sliding block is disposed at the driving end of the drive member. The drive member is configured to drive the sliding shaft to cause the sliding block to move toward and away from the positioning block.

[0028] When using this technical solution, the sliding shaft passes through the guide hole, and the support guide block provides support for the sliding shaft, thereby improving the sliding stability of the sliding shaft. The provision of the guide hole ensures the accuracy of the sliding shaft's movement direction, ensuring that the sliding block slides in a predetermined direction toward or away from the positioning block, thereby ensuring that the second protrusion can cooperate with the recessed portion.

[0029] In one possible implementation, the driving member is a self-locking driving handle rotatably mounted on the support guide block. An end of the sliding shaft, distal from the sliding block, is mounted on the driving end of the self-locking driving handle. The self-locking driving handle is configured to drive the sliding shaft to move the sliding block toward and away from the positioning block. When the sliding block engages with the recessed portion, the self-locking driving handle self-locks.

[0030] In a possible implementation, the limiting member is movably disposed on the support rod.

[0031] When the above technical solution is adopted, the relative position of the limiting member and the support rod can be adjusted to ensure that the limiting member contacts the closed end of the cover body and can apply a force to the cover body to move closer to the shielding film.

[0032] In a possible implementation, the open end is provided with a groove that matches the corrugation of the shielding film.

[0033] When the above technical solution is adopted, the covering area of ​​the cover body can be expanded, the area of ​​the welding area to be inspected at one time can be increased, and the inspection efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the partial structure of the shielding film provided in an embodiment of the present application.

[0035] Figure 2 Schematic diagram of the positional relationship between the shielding film detection device and the shielding film provided in an embodiment of the present application.

[0036] Figure 3 A schematic structural diagram of a position limiting component in an example provided in an embodiment of the present application.

[0037] Figure 4 A schematic structural diagram of the cover body and elastic seal provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1- cover, 2- elastic seal, 3- limit assembly, 31- positioning structure, 311- support plate, 312- positioning block,

[0040] 3121-first protrusion, 313-sliding block, 3131-second protrusion, 314-driving component, 3141-support guide block,

[0041] 3142-sliding shaft, 3143-driving member, 32-support rod, 33-limiting member;

[0042] 20-shielding film, 201-welding area, 202-corrugation, 203-node, 2031-recessed portion. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0045] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it necessarily refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] The directional words appearing in the following description are all directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., which indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0047] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more such features.

[0048] In the description of this application, unless otherwise specified, “plurality” means two or more (including two), and similarly, “multiple groups” means two or more (including two).

[0049] Membrane tanks are primarily used for the storage and transportation of liquefied natural gas (LNG). They have a multi-layered structure, with a primary shielding layer and a secondary shielding layer, arranged from the inner cavity to the exterior. The primary shielding layer comprises a primary shielding membrane and a primary insulation module, while the secondary shielding layer comprises a secondary shielding membrane and a secondary insulation module.

[0050] In actual operation, the installation order of the film tank is generally from the outside to the inside, that is, it is installed in the order of secondary insulation module, secondary shielding film, main insulation module, and main shielding film.

[0051] In practice, after installing the secondary shielding membrane and the secondary insulation module, a common method for testing the secondary shielding membrane's seal is to inject a tracer gas, such as helium, into the secondary insulation module. A testing device equipped with a tracer gas analyzer is then moved along the weld area of ​​the secondary shielding membrane. If the testing device detects the presence of tracer gas, it can be concluded that the secondary shielding membrane has a seal defect.

[0052] After the secondary shielding membrane is installed, the primary insulation module and the primary shielding membrane are installed in sequence. Similarly, after the primary insulation module and the primary shielding membrane are installed, a common method for testing the seal of the primary shielding membrane is to inject a tracer gas, such as helium, into the primary insulation module. A testing device equipped with a tracer gas analyzer is then moved along the weld area of ​​the primary shielding membrane. If the testing device detects the presence of tracer gas, it can be concluded that the primary shielding membrane has a seal defect.

[0053] It should be noted that the shielding film detection device provided in the embodiment of the present application is applicable to the primary shielding film and the secondary shielding film. For the convenience of description, the primary shielding film and the secondary shielding film are now collectively referred to as shielding films.

[0054] In the prior art, testing the sealing performance of shielding films requires the use of large amounts of tracer gas, which is costly. Furthermore, if a local sealing defect is detected in the shielding film, the defective area must be tested again after repair or replacement.

[0055] To re-inspect the seal defect area, the conventional method is to inject tracer gas into the insulation module and then move the inspection equipment equipped with a tracer gas analyzer along the weld area of ​​the shielding membrane. This further wastes tracer gas and increases the cost of shielding membrane seal inspection.

[0056] In addition, it should be pointed out that Figure 1 A schematic diagram of the partial structure of the shielding film 20 provided in an embodiment of the present application is shown.

[0057] like Figure 1 As shown, the shielding film 20 is provided with corrugations 202 extending in different directions, and where the corrugations 202 intersect, a flower node 203 of the shielding film 20 is formed. In the embodiment provided in the present application, the flower node 203 has two oppositely arranged recessed portions 2031.

[0058] In a specific implementation, the shielding film 20 is formed by overlapping a plurality of shielding film units. The adjacent edges of two shielding film units are overlapped together. Generally, two adjacent shielding film units are connected together by welding, thereby forming a welding area 201.

[0059] Please refer to Figure 2As shown, an embodiment of the present application provides a shielding film detection device for detecting the sealing performance of the welding area 201 of the shielding film 20.

[0060] Specifically, the shielding film detection device includes a cover body 1, an elastic seal 2, an air intake component, a detection component and a control component, wherein the cover body 1 has a receiving cavity, combined with Figure 2 and Figure 4 As shown, the cover body 1 is used to cover the shielding film 20 , and at least part of the welding area 201 to be detected is located in the covering area of ​​the cover body 1 .

[0061] The structure of the cover body 1 is not specifically limited here. For example, the cover body 1 can be a rectangular parallelepiped structure, a triangular prism structure, etc., whichever is greater, depending on the actual situation.

[0062] The size of the cover body 1 is not specifically limited here either, and similarly, the wall thickness of the cover body 1 is not specifically limited here either.

[0063] In a specific implementation, the cover body 1 can be made of a plastic material. For example, the cover body 1 can be made of acrylic.

[0064] In this way, on the one hand, the cover body 1 made of acrylic material has a low density and a light weight, which is not only convenient for carrying and installation, but also, when the cover body 1 is adsorbed on the shielding film 20, the influence of the gravity of the cover body 1 itself is small, reducing the possibility of the cover body 1 detaching from the shielding film 20.

[0065] On the other hand, the material of the cover 1 is set to acrylic, and the cover 1 is a transparent cover 1. When the cover 1 is placed on the shielding film 20, it is easy to observe to ensure that the welding area 201 to be detected is located within the covering area of ​​the cover 1.

[0066] The accommodating cavity has an open end and a closed end that are arranged opposite to each other, and the open end is arranged toward the shielding film 20 so as to facilitate the cover body 1 to be covered on the shielding film 20 .

[0067] In the embodiment provided in the present application, the cover body 1 has a bottom wall and side walls arranged around the edges of the bottom wall, and the side walls and the bottom wall surround a receiving cavity to form the cover body 1.

[0068] In actual situation, bottom wall can be formed in one piece with side wall.Of course, sealing connection mode such as welding or bonding can also be adopted to connect bottom wall and side wall together.

[0069] The elastic sealing member 2 is provided on the cover body 1. In a specific implementation, the elastic sealing member 2 can be provided on the cover body 1 by bonding. Of course, the embodiment is not limited thereto.

[0070] like Figure 4 As shown, the elastic sealing member 2 corresponds to the edges around the opening end.

[0071] Specifically, the elastic seal 2 is disposed at the open end of the cover 1 and is arranged along the four edges of the open end. When the cover 1 is placed on the shielding film 20 , the elastic seal 2 is located between the cover 1 and the shielding film 20 .

[0072] During the process of placing the cover 1 over the shielding film 20, the elastic seal 2 deforms and is compressed, thereby reducing its thickness. This compression improves the fit between the elastic seal 2, the cover 1, and the shielding film 20, enhancing the sealing performance of the elastic seal 2. This ensures that when the pressure within the containment cavity is within a certain range, the cover 1 remains attached to the shielding film 20, and external air is prevented from entering the containment cavity through the elastic seal 2, thereby improving the sealing performance between the cover 1 and the shielding film 20.

[0073] It should be noted that the thickness of the elastic sealing member 2 is the dimension of the elastic sealing member 2 in the direction from the open end to the closed end.

[0074] The thickness of the elastic sealing member 2 is not limited here and shall be subject to actual conditions.

[0075] One end of the suction component is connected to the accommodating cavity, and is used to generate negative pressure between the cover body 1 and the shielding film 20 so as to adsorb the cover body 1 on the shielding film 20.

[0076] The suction component may include a vacuum pump, and one end of the vacuum pump may be connected to the accommodating cavity.

[0077] Specifically, an air pipe can be provided at the air suction end of the vacuum pump, and an air hole corresponding to the air pipe can be provided on the cover body 1. The air pipe is inserted into the air hole, thereby connecting the vacuum pump to the accommodating cavity.

[0078] During specific operation, after the cover body 1 is placed on the shielding film 20 , the suction component can be started to suction air to generate negative pressure between the cover body 1 and the shielding film 20 , thereby adsorbing the cover body 1 on the shielding film 20 .

[0079] The detection component is connected to the accommodating cavity and is used to detect the pressure in the accommodating cavity and generate a pressure signal.

[0080] The detection assembly may include a pressure gauge, which is in communication with the accommodating cavity and is used to detect the pressure in the accommodating cavity and generate a pressure signal. The pressure gauge is also electrically connected to the control assembly and is used to transmit the pressure signal to the control assembly.

[0081] The control component is electrically connected to the air suction component and is used to control the start and stop of the air suction component. The control component is also electrically connected to the detection component and is used to receive the pressure signal.

[0082] In this way, after the cover body 1 is placed on the shielding membrane 20 and ensuring that at least part of the welding area 201 to be detected is located in the covering space of the cover body 1, the suction component can be started by the control component to perform suction to generate negative pressure between the cover body 1 and the shielding membrane 20. At the same time, the elastic seal 2 is compressed and the cover body 1 is adsorbed on the shielding membrane 20.

[0083] At the same time, the control assembly can activate the detection assembly to detect the pressure within the containment chamber and generate a pressure signal. The control assembly receives the pressure signal and compares it with a preset pressure range pre-stored in the control assembly. When the pressure value detected by the detection assembly is within the preset range, the suction assembly can be controlled to stop suctioning.

[0084] The detection component monitors the pressure within the containment chamber in real time and continuously transmits the pressure signal to the control component. After a certain period of time, if the pressure value detected by the detection component remains within the preset range, it indicates that the sealing performance of the weld area 201 to be inspected is good and there are no sealing defects. After a certain period of time, if the pressure value detected by the detection component is less than the minimum value of the preset range, it indicates that at least part of the weld area 201 to be inspected has a sealing defect.

[0085] When the shielding film detection device provided in the embodiment of the present application is used to detect the welding area 201 to be detected, compared with the prior art method of injecting tracer gas into the insulation module and then moving the detection equipment equipped with a tracer gas analyzer along the welding area 201 of the shielding film 20, there will be no waste of tracer gas. Moreover, the shielding film detection device provided in the present application has a simple structure and can be recycled and reused, which can reduce the detection cost of the sealing of the shielding film 20.

[0086] In addition, in the embodiment provided in the present application, during specific implementation, the detection component may further include bubble water, and the bubble water is applied to the welding area 201 to be detected.

[0087] In this case, after the cover body 1 is placed on the shielding film 20 and at least a portion of the weld area 201 to be inspected is located within the cover space of the cover body 1, the control assembly activates the air suction assembly to suction air. If bubbling occurs in the weld area, it indicates that the weld area has a sealing defect. If no bubbling occurs in the weld area, it indicates that the weld area has good sealing performance.

[0088] Illustratively, the bubble water may be soapy water, but of course, it is not limited thereto.

[0089] As an example, the elastic sealing member 2 is made of sponge or rubber.

[0090] The material of the elastic seal 2 is set to sponge or rubber, so that the elastic seal 2 has excellent elasticity and resilience, and can return to its original shape after compression, thereby ensuring the sealing performance between the cover body 1 and the shielding membrane 20.

[0091] In addition, it should be noted that when the material of the elastic seal 2 is sponge, the thickness of the elastic seal 2 can be 20 mm to 30 mm. For example, the thickness of the elastic seal 2 can be 20 mm, 21 mm, 24 mm, 25 mm, 26 mm, 27.5 mm, 28 mm, 30 mm, etc., depending on the actual situation.

[0092] At the same time, when the material of the elastic seal 2 is sponge, after the cover body 1 is placed on the shielding membrane 20 and ensuring that at least part of the welding area 201 to be detected is located in the covering space of the cover body 1, the elastic seal 2 is compressed during the process of starting the suction component through the control component to perform suction, and the pores of the sponge become smaller, thereby improving the sealing performance of the elastic seal 2, so as to ensure that when the pressure in the accommodating cavity is within a certain range, the cover body 1 can be adsorbed on the shielding membrane 20, and external gas will not enter the accommodating cavity through the elastic seal 2, thereby improving the sealing performance between the cover body 1 and the shielding membrane 20.

[0093] In one possible implementation, Figure 2 and Figure 3 As shown, the shielding film detection device further includes a limiting component 3, which is provided on the shielding film 20. One end of the limiting component 3 away from the shielding film 20 is used to contact the closed end to apply a force to the cover body 1 to move closer to the shielding film 20.

[0094] In this way, the setting of the limiting component 3 enables the cover body 1 to have a force to move closer to the shielding film 20, which can improve the stability of the cover body 1 adsorbed on the shielding film 20 and ensure the sealing between the cover body 1 and the shielding film 20.

[0095] The limiting assembly 3 can be detachably mounted on the shielding film 20. When a force is required to apply to the cover body 1 toward the shielding film 20, the limiting assembly 3 can be set on the shielding film 20. When the test is completed, the limiting assembly 3 can be removed from the shielding film 20, and then the cover body 1 can be removed from the shielding film 20.

[0096] As a feasible way, Figure 2 and Figure 3 As shown, the limiting assembly 3 provided in the embodiment of the present application includes a positioning structure 31 , a support rod 32 and a limiting member 33 , and the positioning structure 31 is used to be set on the shielding film 20 .

[0097] The support rod 32 has a first end and a second end that are oppositely disposed. The first end is disposed on the positioning structure 31 and can be fixedly mounted on the positioning structure 31. The second end extends away from the shielding film 20. The length of the support rod 32 can extend perpendicular to the surface of the shielding film 20. Of course, the length of the support rod 32 can also form an acute angle with the surface of the shielding film 20, that is, the support rod 32 can be arranged at an angle relative to the shielding film 20.

[0098] The limiting member 33 is provided at the second end, and the limiting member 33 is used for limiting contact with the closed end to apply a force to the cover body 1 to move closer to the shielding film 20 .

[0099] The limiter 33 can be movably arranged on the support rod 32 to facilitate adjustment of the relative position of the limiter 33 and the support rod 32, thereby ensuring that the limiter 33 contacts the closed end of the cover body 1 and can apply a force to the cover body 1 to move closer to the shielding membrane 20.

[0100] The stopper 33 can be threadedly connected to the support rod 32. Specifically, an external thread can be provided at the second end of the support rod 32, and a threaded hole can be provided on the stopper 33 to cooperate with the external thread on the support rod 32. When the stopper 33 is rotated, the relative position between the stopper 33 and the support rod 32 can be adjusted, and further, the relative position between the stopper 33 and the closed end can be adjusted.

[0101] The limiting member 33 may be a limiting rod, a limiting plate, a limiting frame, etc., which is not specifically limited here and is subject to actual conditions.

[0102] The structure and material of the limiting member 33 and the supporting rod 32 are not specifically limited here either.

[0103] As an example, the positioning structure 31 includes a suction cup, which is used to be adsorbed on the shielding film 20. The suction cup is connected to an air suction component, which is used to generate negative pressure between the suction cup and the shielding film 20.

[0104] Thus, the positioning structure 31 includes a suction cup, which is connected to the suction assembly. When the control assembly controls the suction assembly to start, negative pressure can be generated between the suction cup and the shielding film 20, so that the suction cup can be adsorbed on the shielding film 20.

[0105] Moreover, the positioning structure 31 includes a suction cup, which generally has a certain flexibility and is not easily affected by the surface of the shielding film 20. The suction cup can be tightly fitted with the shielding film 20 through deformation to achieve a good positioning effect.

[0106] At the same time, the adsorption force between the suction cup and the shielding film 20 is relatively uniform, which can avoid scratches, indentations and other damages to the shielding film 20 caused by excessive local pressure.

[0107] Furthermore, the suction cup installation and removal process is typically quick and easy. Simply place the suction cup on the shielding film 20 and activate the suction assembly to draw out the air between the suction cup and the shielding film 20, creating a negative pressure. To remove, simply introduce air into the suction cup or break the negative pressure to separate the suction cup from the shielding film 20.

[0108] When the positioning structure 31 includes a suction cup, the first end of the support rod 32 can be fixedly mounted on the suction cup. At the same time, in addition to the above-described situation where the limiting member 33 is movably arranged on the support rod 32, the limiting member 33 can also be fixedly mounted on the support rod 32.

[0109] In this case, when the control assembly activates the suction assembly and negative pressure is generated between the suction cup and shielding film 20, the suction cup undergoes elastic deformation to conform to the shielding film 20. This further causes the first end to move closer to the shielding film 20, reducing the distance between the shielding film 20 and the first end. This, in turn, causes the stopper 33 to move closer to the shielding film 20, bringing it into contact with the closed end.

[0110] It should be noted that the flower section 203 of the shielding film 20 has two oppositely arranged recessed portions 2031, such as Figure 1 shown.

[0111] As another example, see Figure 3 As shown, the positioning structure 31 includes a support plate 311, a positioning block 312, a sliding block 313, and a driving component 314. The first end of the support rod 32 is disposed on the support plate 311. The positioning block 312 is disposed on a side of the support plate 311 away from the support rod 32. The positioning block 312 has a first protrusion 3121 that cooperates with the recessed portion 2031.

[0112] The specific structure of the first protrusion 3121 matches the structure of the recessed portion 2031 and is not specifically limited here.

[0113] The first protrusion 3121 can extend into the recess 2031 and can press against the recess 2031, thereby fixing the positioning block 312 relatively to the flower node 203. Furthermore, the relative position of the positioning block 312 and the shielding film 20 is fixed.

[0114] The sliding block 313 is slidably disposed on a side of the support plate 311 away from the support rod 32 . The sliding block 313 has a second protrusion 3131 that matches the recess 2031 .

[0115] The specific structure of the second protrusion 3131 matches the structure of the recessed portion 2031 and is not specifically limited here.

[0116] The second protrusion 3131 can extend into the recess 2031 and can be pressed against the recess 2031, thereby fixing the sliding block 313 relatively to the flower node 203. Furthermore, the relative position of the sliding block 313 and the shielding film 20 is fixed.

[0117] The positioning block 312 and the sliding block 313 are arranged on both sides of the flower section 203. The sliding block 313 can slide relative to the support plate 311 toward and away from the positioning block 312. The positioning block 312 and the sliding block 313 correspond to the two recessed portions 2031 of the flower section 203 respectively.

[0118] The driving component 314 is disposed on the supporting plate 311 , and the sliding block 313 is disposed at a driving end of the driving component 314 . The driving component 314 is used to drive the sliding block 313 to slide in a direction close to or away from the positioning block 312 .

[0119] In a specific implementation, first, the first protrusion 3121 can be inserted into one of the recesses 2031, and the driving component 314 drives the sliding block 313 to slide toward the positioning block 312, reducing the distance between the sliding block 313 and the positioning block 312, until the second protrusion 3131 is inserted into the other recess 2031 arranged opposite the first recess 2031, and the first protrusion 3121 is pressed tightly against the recess 2031 that matches the positioning block, and the second protrusion 3131 is pressed tightly against the recess 2031 that matches the sliding block. In this way, the relative position of the positioning structure 31 and the flower node 203 can be fixed, and further, the relative position between the positioning structure 31 and the shielding film 20 can be fixed, so that the limiting assembly 3 is positioned on the shielding film 20.

[0120] When the positioning structure 31 needs to be removed from the shielding membrane 20, the driving component 314 can be controlled to drive the sliding block 313 to slide away from the positioning block 312, increasing the distance between the sliding block 313 and the positioning block 312 until the second protrusion 3131 is out of the recessed portion 2031. At the same time, the first protrusion 3121 can be disengaged from the recessed portion 2031. At this time, the positioning structure 31 is removed from the shielding membrane 20.

[0121] In some embodiments, as Figure 3 As shown, the driving component 314 includes a support guide block 3141 , a sliding shaft 3142 and a driving member 3143 . The support guide block 3141 is disposed on a side of the support plate 311 away from the support rod 32 .

[0122] The support guide block 3141 can be fixedly mounted on the support plate 311 by welding, screw connection or riveting. Of course, this is just an example and is not intended to be a specific limitation.

[0123] The support guide block 3141 is provided with a guide hole, the axis of which extends along the movement direction of the sliding block 313. The sliding block 313 is provided at one end of the sliding shaft 3142, and the other end of the sliding shaft 3142 extends through the guide hole.

[0124] The sliding shaft 3142 passes through the guide hole, and the support guide block 3141 provides support for the sliding shaft 3142, thereby improving the sliding stability of the sliding shaft 3142. The provision of the guide hole ensures the accuracy of the movement direction of the sliding shaft 3142, allowing the sliding block 313 to slide in a direction toward or away from the positioning block 312, thereby ensuring that the second protrusion 3131 can cooperate with the recessed portion 2031.

[0125] The driving member 3143 is set on the supporting guide block 3141, and the end of the sliding shaft 3142 away from the sliding block 313 is set at the driving end of the driving member 3143. The driving member 3143 is used to drive the sliding shaft 3142 to drive the sliding block 313 to move towards and away from the positioning block 312.

[0126] Exemplarily, the driving member 3143 may be a driving cylinder, the cylinder body of the driving cylinder may be fixedly mounted on the supporting guide block 3141 , and the sliding block 313 may be disposed at the telescopic end of the driving cylinder.

[0127] In addition, it should be noted that when the driving member 3143 is a driving cylinder, the driving member 3143 can be electrically connected to the control component to control the extension and retraction of the driving cylinder through the control component.

[0128] In an alternative approach, Figure 3 As shown, the driving member 3143 is a self-locking driving handle, which is rotatably mounted on the support guide block 3141. The end of the sliding shaft 3142 away from the sliding block 313 is mounted on the driving end of the self-locking driving handle. The self-locking driving handle is used to drive the sliding shaft 3142 to move the sliding block 313 toward and away from the positioning block 312. When the sliding block 313 is engaged with the recessed portion 2031, the self-locking driving handle can self-lock.

[0129] It should be noted that the specific structure and self-locking method of the self-locking drive handle are based on the structure in the prior art that can drive the sliding shaft to slide and can self-lock, and will not be described in detail here.

[0130] As an example, the open end is provided with a groove that matches the corrugation 202 of the shielding film 20.

[0131] In this way, the covering area of ​​the cover body 1 can be expanded, the area of ​​the welding area 201 detected at one time can be increased, and the detection efficiency can be improved.

[0132] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure can refer to a physical connection. For example, the physical connection can be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts, or other barrier; the physical connection can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A shielding film detection device, characterized in that: Used to detect the sealing of the welding area of ​​the shielding film; the shielding film detection device includes: The cover has a housing cavity; the housing cavity has an open end and a closed end opposite to each other; the open end is arranged toward the shielding film; the cover is used to cover the shielding film, and at least part of the welding area to be inspected is located within the housing area of ​​the cover; An elastic sealing member is provided on the cover body; the elastic sealing member corresponds to the edges around the opening end; an air suction component, one end of which is in communication with the accommodating cavity and is used to generate negative pressure between the cover body and the shielding film; a detection component, connected to the accommodating cavity, for detecting the pressure in the accommodating cavity and generating a pressure signal; A control component is electrically connected to the air suction component, and is used to control the start and stop of the air suction component; the control component is also electrically connected to the detection component, and is used to receive the pressure signal; The shielding film detection device further includes a limiting component, which is arranged on the shielding film; an end of the limiting component away from the shielding film is used to contact the closed end in a limiting manner to apply a force to the cover body to move closer to the shielding film; The limiting component includes: A positioning structure, configured to be arranged on the shielding film; The support rod has a first end and a second end that are oppositely disposed; the first end is disposed on the positioning structure, and the second end extends in a direction away from the shielding film; a limiting member disposed at the second end; the limiting member is used to limit contact with the closed end to apply a force to the cover body toward the shielding film; The shielding film's flower section has two oppositely arranged recessed portions; the positioning structure includes: a support plate, wherein the first end is disposed on the support plate; A positioning block is provided on a side of the support plate away from the support rod; the positioning block has a first protrusion that matches the recessed portion; A sliding block is slidably arranged on a side of the support plate away from the support rod; the sliding block has a second protrusion that cooperates with the recessed portion; the positioning block and the sliding block are arranged on both sides of the flower node opposite to each other, and the sliding block can slide relative to the support plate in a direction close to and away from the positioning block; The driving component is arranged on the supporting plate; the sliding block is arranged at the driving end of the driving component, and the driving component is used to drive the sliding block to slide in a direction close to and away from the positioning block.

2. The shielding film detection device according to claim 1, characterized in that: The elastic sealing member is made of sponge or rubber.

3. The shielding film detection device according to claim 1, wherein: The positioning structure includes a suction cup, which is used to be adsorbed on the shielding film; the suction cup is connected to the suction component, and the suction component is used to generate negative pressure between the suction cup and the shielding film.

4. The shielding film detection device according to claim 1, characterized in that: The driving component includes: A support guide block is provided on a side of the support plate away from the support rod; a guide hole is provided on the support guide block, and an axis of the guide hole extends along the movement direction of the sliding block; A sliding shaft, one end of the sliding block is disposed on one end of the sliding shaft; the other end of the sliding shaft extends through the guide hole; A driving member is provided on the supporting guide block; an end of the sliding shaft away from the sliding block is provided at the driving end of the driving member, and the driving member is used to drive the sliding shaft to drive the sliding block to move toward and away from the positioning block.

5. The shielding film detection device according to claim 4, characterized in that: The driving member is a self-locking driving handle, which is rotatably arranged on the supporting guide block; the end of the sliding shaft away from the sliding block is arranged at the driving end of the self-locking driving handle, and the self-locking driving handle is used to drive the sliding shaft to drive the sliding block to move toward and away from the positioning block, and when the sliding block cooperates with the recessed portion, the self-locking driving handle can self-lock.

6. The shielding film detection device according to claim 1, characterized in that: The limiting member is movably arranged on the supporting rod.

7. The shielding film detection device according to claim 1, characterized in that: The open end is provided with a groove that matches the corrugation of the shielding film.

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