Shielding film detection device

Abstract

The invention provides a shielding film detection device, relates to the technical field of shielding film detection, and is used for reducing the cost of detecting the sealing performance of a shielding film. The shielding film detection device comprises a cover body, an elastic sealing piece, an air suction assembly, a detection assembly and a control assembly, and the cover body is provided with a containing cavity. The containing cavity is provided with an open end and a closed end which are oppositely arranged, and the open end faces the shielding film. The cover body is used for covering the shielding film, and at least part of the to-be-detected welding area is located in the covering area of the cover body. The elastic sealing piece is arranged on the cover body and corresponds to the peripheral edge of the opening end. One end of the air suction assembly communicates with the containing cavity and is used for generating negative pressure between the cover body and the shielding film. The detection assembly communicates with the containing cavity and is used for detecting the pressure intensity in the containing cavity and generating a pressure intensity signal. The control assembly is electrically connected with the air suction assembly and used for controlling starting and stopping of the air suction assembly. The control assembly is further electrically connected with the detection assembly and used for receiving the pressure intensity signal.

Description

Technical Field

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

[0002] Membrane tanks are mainly used for storing and transporting liquefied natural gas. Membrane tanks generally have a shielding film and a heat insulation module.

[0003] In the prior art, in order to detect the sealing performance of the shielding film, the commonly used method is to inject a tracer gas such as helium into the heat insulation module, and then move a detection device equipped with a tracer gas analyzer along the welding area of the shielding film inside the membrane tank. If the detection device detects the presence of the tracer gas, it can be determined that there is a sealing defect in the shielding film.

[0004] However, in the prior art, the cost of 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] To achieve the above object, the present application provides a shielding film detection device for detecting the sealing performance of the welding area of the shielding film. The shielding film detection device includes a cover body, an elastic seal, a suction assembly, a detection assembly, and a control assembly. Among them, the cover body has a receiving cavity. The receiving cavity has an open end and a closed end that are oppositely arranged, and the open end faces 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 corresponds to the four peripheral edges of the open end. One end of the suction assembly is connected to the receiving cavity and is used to generate a negative pressure between the cover body and the shielding film. The detection assembly is connected to the receiving cavity and is used to detect the pressure inside the receiving cavity and generate a pressure signal. The control assembly is electrically connected to the suction assembly and is used to control the start and stop of the suction assembly. The control assembly is also electrically connected to the detection assembly and is used to receive the pressure signal.

[0007] When adopting the above technical solution, after covering the cover body on the shielding film and ensuring that at least part of the welding area to be detected is located within the covering space of the cover body, the suction assembly can be started by the control assembly to suck air, so as to generate a negative pressure between the cover body and the shielding film. At the same time, the elastic seal is compressed, and the cover body is adsorbed on the shielding film.

[0008] At the same time, the detection assembly can be started by the control assembly to detect the pressure inside the receiving cavity and generate a pressure signal. The control assembly receives the pressure signal. When the pressure value detected by the detection assembly is within the preset range, the control assembly can control the suction assembly to stop sucking air.

[0009] The detection component detects the pressure in the accommodation cavity 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 is still within the preset range, it indicates that the sealing performance of at least part of the welding area to be detected 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 there are sealing defects in at least part of the welding area to be detected.

[0010] When using the shielding film detection device provided by the present application to detect the welding area to be detected, compared with the prior art method of injecting a tracer gas into the adiabatic module and then moving a detection device equipped with a tracer gas analyzer along the welding area of the shielding film, it will not cause waste of the tracer gas. Moreover, the shielding film detection device provided by the present application has a simple structure, can be recycled repeatedly, and can reduce the detection cost of the shielding film sealing performance.

[0011] In a possible implementation, the material of the elastic seal is sponge or rubber.

[0012] When adopting the above technical solution, setting the material of the elastic seal as sponge or rubber enables the elastic seal to have excellent elasticity and resilience, and it can return to its original state after compression, ensuring the sealing performance between the cover body and the shielding film.

[0013] In a possible implementation, the shielding film detection device further includes a limiting component, and the limiting component is arranged on the shielding film. The end of the limiting component away from the shielding film is used for limiting contact with the closed end to apply a force to the cover body to move it closer to the shielding film.

[0014] When adopting the above technical solution, the setting of the limiting component enables the cover body to have a force moving it closer to the shielding film, which can improve the stability of the cover body adsorbed on the shielding film and, at the same time, ensure the sealing performance between the cover body and the shielding film.

[0015] In a possible implementation, the limiting component includes a positioning structure, a support rod, and a limiting member. The positioning structure is used for being arranged on the shielding film. The support rod has a first end and a second end arranged oppositely. The first end is arranged on the positioning structure, and the second end extends in a direction away from the shielding film. The limiting member is arranged at the second end, and the limiting member is used for limiting contact with the closed end to apply a force to the cover body to move it closer to the shielding film.

[0016] In a possible implementation, the positioning structure includes a suction cup, and the suction cup is used for adsorbing on the shielding film. The suction cup is communicated with a suction component, and the suction component is used for generating 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, and the suction cup is communicated with the air suction component. When the control component controls the air suction component to start, a 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. Generally, the suction cup has a certain flexibility and is not easily affected by the surface of the shielding film. The suction cup can be closely attached to 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 to the shielding film such as scratches and indentations caused by excessive local pressure.

[0020] Furthermore, the installation and disassembly process of the suction cup is usually relatively simple and fast. Just place the suction cup on the shielding film and start the air suction component to suck out the air between the suction cup and the shielding film to form a negative pressure to achieve installation. When disassembling, just introduce air into the suction cup or break the negative pressure environment to separate the suction cup from the shielding film.

[0021] In a possible implementation manner, the flower knots of the shielding film have two recessed parts arranged oppositely.

[0022] The positioning structure includes a support plate, a positioning block, a sliding block and a driving component. 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 protruding part that cooperates with the recessed part. 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 protruding part that cooperates with the recessed part. The positioning block and the sliding block are arranged oppositely on both sides of the flower knot, and the sliding block can slide relative to the support plate in the directions of approaching and departing 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 directions of approaching and departing from the positioning block.

[0023] When the above technical solution is adopted, the first protruding part can extend into the recessed part, and the first protruding part can be pressed tightly against the recessed part, so as to relatively fix the positioning block on the flower knot. Further, the relative position of the positioning block and the shielding film is fixed.

[0024] The second protruding part can extend into the recessed part, and the second protruding part can be pressed tightly against the recessed part, so as to relatively fix the sliding block on the flower knot. Further, the relative position of the sliding block and the shielding film is fixed.

[0025] In specific implementation, the first protruding portion can be inserted into one of the recessed portions, and the driving component drives the sliding block to slide towards the positioning block, reducing the distance between the sliding block and the positioning block until the second protruding portion is inserted into the other recessed portion that is oppositely arranged with respect to the one recessed portion, and the first protruding portion abuts tightly against the recessed portion that cooperates with the positioning block, and the second protruding portion abuts tightly against the recessed portion that cooperates with the sliding block. Thereby, the relative position between the positioning structure and the flower section can be fixed. Further, the relative position between the positioning structure and the shielding film can be fixed, thereby positioning the limiting component on the shielding film.

[0026] When it is necessary to remove the positioning structure 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 protruding portion disengages from the recessed portion. At this time, the positioning structure can be removed from the shielding film.

[0027] In a possible implementation manner, the driving component includes a support guiding block, a sliding shaft, and a driving member. The support guiding block is arranged on the side of the support plate away from the support rod. A guiding hole is provided on the support guiding block, and the axis of the guiding hole extends along the movement direction of the sliding block. The sliding block is arranged at one end of the sliding shaft, and the other end of the sliding shaft extends through the guiding hole. The driving member is arranged on the support guiding block, and the end of the sliding shaft away from the sliding block is arranged at the driving end of the driving member. The driving member is used to drive the sliding shaft to drive the sliding block to move towards and away from the positioning block.

[0028] When adopting the above technical solution, the sliding shaft passes through the guiding hole, and the support guiding block can provide a supporting force for the sliding shaft, which can improve the sliding stability of the sliding shaft. The setting of the guiding hole can ensure the accuracy of the movement direction of the sliding shaft, ensure that the sliding block slides along the preset direction towards or away from the positioning block, so as to ensure that the second protruding portion can cooperate with the recessed portion.

[0029] In a possible implementation manner, the driving member is a self-locking driving handle, and the self-locking driving handle is rotatably arranged on the support guiding block. The end of the sliding shaft away from the sliding block is arranged at the driving end of the self-locking driving handle. The self-locking driving handle is used to drive the sliding shaft to drive the sliding block to move towards and away from the positioning block, and when the sliding block cooperates with the recessed portion, the self-locking driving handle can be self-locked.

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

[0031] When adopting the above technical solution, it is convenient to adjust the relative position between the limiting member and the support rod, so as to ensure that the limiting member contacts the closed end of the cover body and can exert a force towards the shielding film on the cover body.

[0032] In a possible implementation, a groove matching the corrugation of the shielding film is provided at the open end.

[0033] When the above technical solution is adopted, the covering area of the cover body can be expanded, the area of the welding area detected at one time can be increased, and the detection efficiency can be improved. Description of the Drawings

[0034] Figure 1 It is a partial structural schematic diagram of the shielding film provided by the embodiment of the present application.

[0035] Figure 2 It is a schematic diagram of the positional relationship between the shielding film detection device and the shielding film provided by the embodiment of the present application.

[0036] Figure 3 It is a schematic diagram of the structure of the limiting component in an example provided by the embodiment of the present application.

[0037] Figure 4 It is a schematic diagram of the structure of the cover body and the elastic seal provided by the embodiment of the present application.

[0038] Description of the Reference Numerals:

[0039] 1 - Cover body, 2 - Elastic seal, 3 - Limiting component, 31 - Positioning structure, 311 - Support plate, 312 - Positioning block,

[0040] 3121 - First protruding part, 313 - Sliding block, 3131 - Second protruding part, 314 - Driving component, 3141 - Support guiding block,

[0041] 3142 - Sliding shaft, 3143 - Driving part, 32 - Support rod, 33 - Limiting piece;

[0042] 20 - Shielding film, 201 - Welding area, 202 - Corrugation, 203 - Knuckle, 2031 - Depressed part. Detailed Embodiments

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

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

[0045] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase "embodiment" appearing in various places in the specification is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0046] The directional terms appearing in the following description are the directions shown in the figures and do not limit the specific structure of this application. For example, in the description of this application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of this application.

[0047] In addition, the terms "first", "second", etc. in the specification, claims or the above-mentioned drawings of this application are used to distinguish different objects and are not used to describe a specific order, and may explicitly or implicitly include one or more of such features.

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

[0049] The thin-film tank is mainly used for storing and transporting liquefied natural gas. The thin-film tank has a multi-layer structure. From the inner cavity of the thin-film tank to the outside, the thin-film tank sequentially has a primary shielding layer and a secondary shielding layer. Among them, the primary shielding layer includes a primary shielding film and a primary thermal insulation module, and the secondary shielding layer includes a secondary shielding film and a secondary thermal insulation module.

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

[0051] In actual situations, after installing the secondary shielding film and the secondary heat insulation module, in order to detect the sealing performance of the secondary shielding film, the commonly used method is to inject a tracer gas such as helium into the secondary heat insulation module, and then move a detection device equipped with a tracer gas analyzer along the welding area of the secondary shielding film. If the detection device detects the presence of the tracer gas, it can be determined that there is a sealing defect in the secondary shielding film.

[0052] After installing the secondary shielding film, the main heat insulation module and the main shielding film are installed in sequence. Similarly, after installing the main heat insulation module and the main shielding film, in order to detect the sealing performance of the main shielding film, the commonly used method is to inject a tracer gas such as helium into the main heat insulation module, and then move a detection device equipped with a tracer gas analyzer along the welding area of the main shielding film. If the detection device detects the presence of the tracer gas, it can be determined that there is a sealing defect in the main shielding film.

[0053] It should be noted that the shielding film detection device provided in the embodiments of the present application is applicable to both the main shielding film and the secondary shielding film. For the sake of convenience of description, the main shielding film and the secondary shielding film are collectively referred to as the shielding film hereinafter.

[0054] In the prior art, in order to detect the sealing performance of the shielding film, a large amount of tracer gas is required, resulting in a high cost. Moreover, after detecting a local sealing defect in the shielding film and performing repairs or replacements, it is necessary to detect the sealed defect area again.

[0055] In order to detect the sealed defect area again, in the prior art, the generally adopted method is to inject the tracer gas into the heat insulation module, and then move a detection device equipped with a tracer gas analyzer along the welding area of the shielding film. In this way, it will further cause waste of the tracer gas and increase the detection cost of the sealing performance of the shielding film.

[0056] In addition, it should be pointed out that Figure 1 Schematically shows a partial structural diagram of the shielding film 20 provided in the embodiments of the present application.

[0057] As Figure 1 shown, the shielding film 20 is provided with corrugations 202 extending in different directions. At the positions where the corrugations 202 intersect, a knuckle 203 of the shielding film 20 is formed. In the embodiments provided in the present application, the knuckle 203 has two relatively arranged recessed portions 2031.

[0058] Specifically, when implemented, 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, the two adjacent shielding film units are connected together by welding, thus 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 housing 1, an elastic seal 2, a suction assembly, a detection assembly, and a control assembly. Among them, the housing 1 has a receiving cavity. Combining Figure 2 and Figure 4 As shown, the housing 1 is used to cover the shielding film 20, and at least part of the welding area 201 to be detected is located within the covering area of the housing 1.

[0061] The structure of the housing 1 is not specifically limited here. Exemplarily, the housing 1 can be in the structure of a cuboid, a triangular prism, etc., specifically subject to the actual situation.

[0062] The size of the housing 1 is not specifically limited here either. Similarly, the wall thickness of the housing 1 is not specifically limited here.

[0063] In specific implementation, the housing 1 can be made of plastic material. Exemplarily, the material of the housing 1 can be acrylic.

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

[0065] On the other hand, when the material of the housing 1 is set as acrylic, the housing 1 is a transparent housing 1, which is convenient for observation when the housing 1 is covered on the shielding film 20 to ensure that the welding area 201 to be detected is located within the covering area of the housing 1.

[0066] The receiving cavity has an open end and a closed end arranged oppositely, and the open end faces the shielding film 20 to facilitate covering the housing 1 on the shielding film 20.

[0067] In the embodiment provided by the present application, the housing 1 has a bottom wall and side walls arranged on the four peripheral edges of the bottom wall, and the side walls and the bottom wall enclose to form the receiving cavity of the housing 1.

[0068] In actual situations, the bottom wall can be integrally formed with the side walls. Of course, welding or bonding and other sealing connection methods can also be used to connect the bottom wall and the side walls together.

[0069] The elastic seal 2 is arranged on the housing 1. In specific implementation, the elastic seal 2 can be arranged on the housing 1 by bonding. Of course, the actual situation is not limited to this.

[0070] As Figure 4 shown, the elastic seal 2 corresponds to the four peripheral edges of the open end.

[0071] Specifically, the elastic seal 2 is disposed at the open end of the cover 1, and the elastic seal 2 is arranged along the four peripheral edges of the open end. When the cover 1 is placed over 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 will deform. The elastic seal 2 can be compressed, causing its thickness to decrease. After the elastic seal 2 is compressed, its degree of adhesion to the cover 1 and the shielding film 20 increases, enhancing the sealing performance of the elastic seal 2. This ensures that when the pressure in the accommodation cavity is within a certain range, the cover 1 can be adsorbed onto the shielding film 20, and external gas will not enter the accommodation 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 seal 2 is the dimension of the elastic seal 2 in the direction from the open end to the closed end.

[0074] The thickness of the elastic seal 2 is not limited here and shall be determined according to the actual situation.

[0075] One end of the air suction assembly is connected to the accommodation cavity and is used to generate a negative pressure between the cover 1 and the shielding film 20, so as to facilitate the adsorption of the cover 1 onto the shielding film 20.

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

[0077] Specifically, an air delivery pipe may be provided at the air suction end of the vacuum pump. At the same time, an air delivery hole corresponding to the air delivery pipe is opened on the cover 1. The air delivery pipe is inserted into the air delivery hole, thereby connecting the vacuum pump to the accommodation cavity.

[0078] During specific operation, after the cover 1 is placed over the shielding film 20, the air suction assembly can be started to suck air, so as to generate a negative pressure between the cover 1 and the shielding film 20, thereby adsorbing the cover 1 onto the shielding film 20.

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

[0080] The detection assembly may include a pressure gauge. The pressure gauge is connected to the accommodation cavity and is used to detect the pressure in the accommodation 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 assembly is electrically connected to the air suction assembly. The control assembly is used to control the start and stop of the air suction assembly. The control assembly is also electrically connected to the detection assembly and is used to receive the pressure signal.

[0082] Thus, after covering the shielding film 20 with the cover body 1 and ensuring that at least part of the welding area 201 to be detected is located within the covering space of the cover body 1, the air suction component can be activated by the control component to suck air, so as to generate a negative pressure between the cover body 1 and the shielding film 20. At the same time, the elastic seal 2 is compressed, and the cover body 1 is adsorbed on the shielding film 20.

[0083] Meanwhile, the detection component can be activated by the control component to detect the pressure inside the accommodation cavity and generate a pressure signal. The control component receives the pressure signal and compares it with the preset pressure range pre-stored in the control component. When the pressure value detected by the detection component is within the preset range, the air suction component can be controlled to stop sucking air.

[0084] The detection component detects the pressure inside the accommodation cavity 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 is still within the preset range, it indicates that the sealing performance of this part of the welding area 201 to be detected 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 there are sealing defects in at least this part of the welding area 201.

[0085] When using the shielding film detection device provided by the embodiment of the present application to detect the welding area 201 to be detected, compared with the prior art method of injecting a tracer gas into the adiabatic module and then moving a detection device equipped with a tracer gas analyzer along the welding area 201 of the shielding film 20, it will not cause waste of the tracer gas. Moreover, the shielding film detection device provided by the present application has a simple structure, can be recycled repeatedly, and can reduce the detection cost of the sealing performance of the shielding film 20.

[0086] In addition, in the embodiment provided by the present application, specifically in 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 covering the shielding film 20 with the cover body 1 and ensuring that at least part of the welding area 201 to be detected is located within the covering space of the cover body 1, when the air suction component is activated by the control component to suck air, if bubbles appear in the welding area, it indicates that there are sealing defects in this welding area. If no bubbles appear in the welding area, it indicates that the sealing performance of this welding area is good.

[0088] Exemplarily, the bubble water can be soapy water. Of course, it is not limited thereto in reality.

[0089] As an example, the material of the elastic seal 2 is 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 state after compression, ensuring the sealing performance between the cover 1 and the shielding film 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 - 30 mm. Exemplarily, 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., subject to the actual situation.

[0092] Meanwhile, when the material of the elastic seal 2 is sponge, after the cover 1 is placed over the shielding film 20 and at least part of the welding area 201 to be detected is ensured to be within the covering space of the cover 1, during the process of starting the suction component to suck air by the control component, the elastic seal 2 is compressed, the pores of the sponge become smaller, improving the sealing performance of the elastic seal 2, so as to ensure that when the pressure in the accommodation cavity is within a certain range, the cover 1 can be adsorbed on the shielding film 20 and external gas will not enter the accommodation cavity through the elastic seal 2, enhancing the sealing performance between the cover 1 and the shielding film 20.

[0093] In one possible implementation, as Figure 2 and Figure 3 shown, the shielding film detection device further includes a limiting component 3, and the limiting component 3 is arranged on the shielding film 20. One end of the limiting component 3 away from the shielding film 20 is used for limiting contact with the closed end to apply a force to the cover 1 to approach the shielding film 20.

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

[0095] The limiting component 3 can be detachably installed on the shielding film 20. When a force is needed to make the cover 1 approach the shielding film 20, the limiting component 3 can be set on the shielding film 20. At the end of the detection, the limiting component 3 can be removed from the shielding film 20, and then the cover 1 can be removed from the shielding film 20.

[0096] As a possible implementation, as Figure 2 and Figure 3 shown, the limiting component 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 arranged on the shielding film 20.

[0097] The support rod 32 has a first end and a second end which are oppositely arranged. The first end is arranged on the positioning structure 31 and can be fixedly installed on the positioning structure 31. The second end extends away from the shielding film 20, and the length extension direction of the support rod 32 can be perpendicular to the surface where the shielding film 20 is located. Of course, the length extension direction of the support rod 32 can also have an acute angle with the surface where the shielding film 20 is located, that is, the support rod 32 can be arranged obliquely with respect to the shielding film 20.

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

[0099] The limiting member 33 can be movably arranged on the support rod 32 to facilitate adjusting the relative position between the limiting member 33 and the support rod 32, so as to ensure that the limiting member 33 contacts the closed end of the cover body 1 and can apply a force to the cover body 1 to approach the shielding film 20.

[0100] The limiting member 33 can be threadedly connected to the support rod 32. Specifically, external threads can be arranged at the second end of the support rod 32, and threaded holes matching the external threads on the support rod 32 can be opened on the limiting member 33. When the limiting member 33 is rotated, the relative position between the limiting member 33 and the support rod 32 can be adjusted, and further, the relative position between the limiting member 33 and the closed end can be adjusted.

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

[0102] The structures and materials of the limiting member 33 and the support rod 32 are not specifically limited here either.

[0103] As an example, the positioning structure 31 includes a suction cup. The suction cup is used for adsorbing on the shielding film 20. The suction cup is communicated with an air suction component, and the air suction component is used for generating negative pressure between the suction cup and the shielding film 20.

[0104] In this way, the positioning structure 31 includes a suction cup, and the suction cup is communicated with an air suction component. When the control component controls the air suction component 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. Generally, the suction cup has a certain flexibility and is not easily affected by the surface of the shielding film 20. The suction cup can be closely attached to 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 damage to the shielding film 20 such as scratches and indentations caused by excessive local pressure.

[0107] Furthermore, the installation and disassembly process of the suction cup is usually relatively simple and quick. Simply place the suction cup on the shielding film 20 and start the air suction component to suck out the air between the suction cup and the shielding film 20 to form a negative pressure, then the installation can be achieved. When disassembling, just introduce air into the suction cup or break the negative pressure environment, and the suction cup can be separated 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 installed on the suction cup. At the same time, in addition to the case where the limiting member 33 is movably arranged on the support rod 32 described above, the limiting member 33 can also be fixedly installed on the support rod 32.

[0109] In this case, when the control component controls the air suction component to start and a negative pressure is generated between the suction cup and the shielding film 20, the suction cup will undergo elastic deformation to fit the shielding film 20. Further, it will drive the first end to move towards the direction close to the shielding film 20, reducing the distance between the shielding film 20 and the first end. Correspondingly, it will drive the limiting member 33 to move towards the direction close to the shielding film 20 so that the limiting member 33 is in limiting contact with the closed end.

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

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

[0112] The specific structure of the first protruding portion 3121 cooperates with the structure of the recessed portion 2031, and no specific limitation is made here.

[0113] The first protruding portion 3121 can extend into the recessed portion 2031, and the first protruding portion 3121 can be pressed tightly against the recessed portion 2031, thereby relatively fixing the positioning block 312 on the flower knot 203. Further, the relative position of the positioning block 312 and the shielding film 20 is fixed.

[0114] The sliding block 313 is slidably arranged on the side of the support plate 311 away from the support rod 32, and the sliding block 313 has a second protruding portion 3131 that cooperates with the recessed portion 2031.

[0115] The specific structure of the second protruding portion 3131 cooperates with the structure of the recessed portion 2031, and no specific limitation is made here.

[0116] The second protruding portion 3131 can extend into the recessed portion 2031, and the second protruding portion 3131 can be pressed against the recessed portion 2031, thereby relatively fixing the sliding block 313 on the spline 203. Further, 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 relatively arranged on both sides of the spline 203, and the sliding block 313 can slide relative to the support plate 311 in directions approaching and departing from the positioning block 312. The positioning block 312 and the sliding block 313 respectively correspond to two recessed portions 2031 of the spline 203.

[0118] The driving component 314 is arranged on the support plate 311, the sliding block 313 is arranged at the driving end of the driving component 314, and the driving component 314 is used for driving the sliding block 313 to slide in directions approaching and departing from the positioning block 312.

[0119] In specific implementation, first, the first protruding portion 3121 can be extended into one of the recessed portions 2031, and the driving component 314 drives the sliding block 313 to slide in a direction approaching the positioning block 312, reducing the distance between the sliding block 313 and the positioning block 312 until the second protruding portion 3131 extends into the other recessed portion 2031 that is oppositely arranged to this one recessed portion 2031, and making the first protruding portion 3121 press tightly against the recessed portion 2031 that cooperates with the positioning block, and the second protruding portion 3131 press tightly against the recessed portion 2031 that cooperates with the sliding block. Thereby, the relative position of the positioning structure 31 and the spline 203 can be fixed. Further, the relative position between the positioning structure 31 and the shielding film 20 is fixed, thereby positioning the limiting component 3 on the shielding film 20.

[0120] When it is necessary to remove the positioning structure 31 from the shielding film 20, the driving component 314 can be controlled to drive the sliding block 313 to slide in a direction departing from the positioning block 312, increasing the distance between the sliding block 313 and the positioning block 312 until the second protruding portion 3131 disengages from the recessed portion 2031. At the same time, the first protruding portion 3121 can be disengaged from the recessed portion 2031. At this time, the positioning structure 31 is removed from the shielding film 20.

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

[0122] The support guiding block 3141 can be fixedly installed on the support plate 311 by means of welding, threaded connection, riveting, etc. Of course, this is only an example here and is not a specific limitation.

[0123] The support guide block 3141 is provided with a guide hole, and the axis of the guide hole extends along the moving direction of the sliding block 313. The sliding block 313 is arranged 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. The support guide block 3141 can provide a supporting force for the sliding shaft 3142, which can improve the sliding stability of the sliding shaft 3142. The setting of the guide hole can ensure the accuracy of the moving direction of the sliding shaft 3142, and ensure that the sliding block 313 slides in one direction towards or away from the positioning block 312, so as to ensure that the second protruding part 3131 can cooperate with the recessed part 2031.

[0125] The driving member 3143 is arranged on the support guide block 3141. The end of the sliding shaft 3142 away from the sliding block 313 is arranged 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 can be a driving cylinder. The cylinder body of the driving cylinder can be fixedly installed on the support guide block 3141, and the sliding block 313 can be arranged 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 telescopic movement of the driving cylinder through the control component.

[0128] In an alternative mode, as Figure 3 shown, the driving member 3143 is a self-locking driving handle, and the self-locking driving handle is rotatably arranged on the support guide block 3141. The end of the sliding shaft 3142 away from the sliding block 313 is arranged at the driving end of the self-locking driving handle. The self-locking driving handle is used to drive the sliding shaft 3142 to drive the sliding block 313 to move towards and away from the positioning block 312, and when the sliding block 313 cooperates with the recessed part 2031, the self-locking driving handle can be self-locked.

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

[0130] As an example, the open end is provided with a groove that cooperates with 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 the present application, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

Claims

1. A shielding film detection device, characterized in that, For detecting the sealing performance of the welding area of the shielding film; the shielding film detection device includes: A cover body having a receiving cavity; the receiving cavity has an open end and a closed end arranged opposite to each other; the open end faces 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; An elastic seal, arranged on the cover body; the elastic seal corresponds to the four peripheral edges of the open end; An air suction assembly, one end of which is connected to the receiving cavity, and is used to generate a negative pressure between the cover body and the shielding film; A detection assembly, connected to the receiving cavity, and is used to detect the pressure in the receiving cavity and generate a pressure signal; A control assembly, electrically connected to the air suction assembly, and the control assembly is used to control the start and stop of the air suction assembly; the control assembly is also electrically connected to the detection assembly and is used to receive the pressure signal.

2. The shielding film detection device according to claim 1, wherein The material of the elastic seal is sponge or rubber.

3. The shielding film detection device according to claim 1, wherein The shielding film detection device further includes a limiting assembly, and the limiting assembly is arranged on the shielding film; the end of the limiting assembly away from the shielding film is used for limiting contact with the closed end to apply a force to the cover body to move closer to the shielding film.

4. The shielding film detection device according to claim 3, characterized in that, The limiting assembly includes: A positioning structure, used to be arranged on the shielding film; A support rod having a first end and a second end arranged opposite to each other; the first end is arranged on the positioning structure, and the second end extends in a direction away from the shielding film; A limiting member, arranged on the second end; the limiting member is used for limiting contact with the closed end to apply a force to the cover body to move closer to the shielding film.

5. The shielding film detection device according to claim 4, wherein, The positioning structure includes a suction cup, and the suction cup is used for adsorbing on the shielding film; the suction cup is communicated with the air suction assembly, and the air suction assembly is used to generate a negative pressure between the suction cup and the shielding film.

6. The shielding film detection device according to claim 4, characterized in that, The knurled section of the shielding film has two recessed parts arranged opposite to each other; the positioning structure includes: A support plate, and the first end is arranged on the support plate; A positioning block, arranged on the side of the support plate away from the support rod; the positioning block has a first protruding part that matches the recessed part; A sliding block, slidably arranged on the side of the support plate away from the support rod; the sliding block has a second protruding part that matches the recessed part; the positioning block and the sliding block are arranged opposite to each other on both sides of the knurled section, and the sliding block can slide relative to the support plate in directions close to and away from the positioning block; A driving component, arranged on the support plate; the sliding block is arranged on the driving end of the driving component, and the driving component is used to drive the sliding block to slide in directions close to and away from the positioning block.

7. The shielding film detection device according to claim 6, wherein The driving component includes: A support and guiding block, arranged on the side of the support plate away from the support rod; a guiding hole is arranged on the support and guiding block, and the axis of the guiding hole extends along the movement direction of the sliding block; A sliding shaft, one end of the sliding block is arranged on one end of the sliding shaft; the other end of the sliding shaft extends through the guiding hole; The driving member is arranged on the support and guiding block; one end of the sliding shaft away from the sliding block is arranged on 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 in the directions close to and away from the positioning block.

8. The shielding film detection device according to claim 7, wherein The driving member is a self-locking driving handle, and the self-locking driving handle is rotatably arranged on the support and guiding block; one end of the sliding shaft away from the sliding block is arranged on 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 in the directions close to and away from the positioning block, and when the sliding block is matched with the concave portion, the self-locking driving handle can be self-locked.

9. The shielding film detection device according to claim 4, wherein The limiting member is movably arranged on the support rod.

10. The shielding film detection device according to claim 1, wherein The open end is provided with a groove matched with the corrugation of the shielding film.

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