Impermeable detection structure for building waterproof membrane material processing

Abstract

The utility model discloses a building waterproof membrane material processing penetration resistance detection structure which comprises a detection table, traction grooves are formed in the inner sides of the front side and the rear side of the top of the detection table, waterproof membrane bodies are arranged in the traction grooves, and a controller is arranged on the left side of the detection table. A humidity monitoring sensor is arranged on the bottom side of the interior of the detection table, and by arranging the detection table, a traction groove, a waterproof membrane body, a controller, the humidity monitoring sensor, a drying structure, a limiting structure and a water seepage mechanism, when anti-seepage detection is conducted on the building waterproof membrane material, the coiled waterproof membrane body is placed on a conveying device; the waterproof membrane body is pulled to be placed in the traction groove of the detection table and penetrates through the traction groove, then the waterproof membrane body is wound around the winding device through the drying structure, the limiting structures on the two sides in the detection table can effectively limit the waterproof membrane body, it is ensured that the waterproof membrane body is kept at the stable position in the detection process, and it is prevented that the detection result is affected by deviation.

Description

Technical Field

[0001] The utility model relates to the technical field of anti - penetration performance tests of waterproof membranes, and particularly to an anti - penetration detection structure for the processing of building waterproof membrane materials. Background Art

[0002] The waterproof membrane material is an anti - seepage membrane, and its standard name for the anti - seepage membrane is polyethylene geomembrane, which is mainly made of polyethylene resin, a thermoplastic resin material that is milky white, semi - transparent to opaque. Polyethylene is a high - molecular polymer, which is a non - toxic, odorless, and tasteless white particle, with a melting point of about 110℃ - 130℃ and a relative density of 0.918 - 0.965; the anti - seepage membrane has good heat resistance and cold resistance, and test devices are usually used in the anti - penetration performance test of the waterproof membrane material.

[0003] Currently, the Chinese utility model with the publication number: CN21776597U discloses an anti - penetration performance test device for waterproof membranes. This utility model discloses an anti - penetration performance test device for waterproof membranes, including the main body of the waterproof membrane test device. A water inlet pipe is connected to the bottom of the main body of the waterproof membrane test device, and the bottom end of the water inlet pipe extends to the top of the main body of the waterproof membrane test device and is connected to a circulating pump. The output end of the circulating pump is connected to a cover plate through a connecting pipe. By using the cooperation of the main body of the waterproof membrane test device, the water inlet pipe, the circulating pump, the cover plate, the water tank, the partition board, the through - hole, the limiting frame, the purification layer, the activated carbon adsorption layer, the fine filter layer, the coarse filter layer, the sedimentation plate, and the drain pipe, the problem that the water - saving effect of the existing waterproof membrane test device is poor, and the water source used in the anti - penetration performance test of the waterproof membrane cannot be effectively treated and reused, resulting in the water source after the anti - penetration performance test of the waterproof membrane being discharged after being used once, causing waste, is solved.

[0004] When the existing detection device conducts anti - penetration detection on building waterproof membrane materials, its operation procedures are numerous, and it is not easy to operate. Moreover, when detecting the rolled waterproof membrane materials, it is impossible to detect the anti - penetration performance of the rolled waterproof membrane materials with high standards, in a short time, and accurately, thus affecting the detection efficiency. Therefore, an anti - penetration detection structure for the processing of building waterproof membrane materials is proposed to solve the above - mentioned problems. Content of the Utility Model

[0005] The main purpose of the utility model is to provide an anti - penetration detection structure for the processing of building waterproof membrane materials, aiming to solve the problems that when the detection device conducts anti - penetration detection on building waterproof membrane materials, its operation procedures are numerous, it is not easy to operate, and when detecting the rolled waterproof membrane materials, it is impossible to detect the anti - penetration performance of the rolled waterproof membrane materials with high standards, in a short time, and accurately, thus affecting the detection efficiency.

[0006] To achieve the above object, an anti - penetration detection structure for the processing of building waterproof membrane materials proposed by the utility model includes a detection table. Traction grooves are provided inside the front side and the rear side of the top of the detection table. A waterproof membrane body is arranged inside the traction grooves. A controller is arranged on the left side of the detection table. A humidity monitoring sensor is arranged on the bottom side inside the detection table, and the humidity monitoring sensor is located at the bottom of the waterproof membrane body. A drying structure is arranged inside the detection table, and limiting structures are arranged on both sides inside the detection table. The limiting structures are located outside the waterproof membrane body. A water seepage mechanism is arranged on the top of the detection table, and the water seepage mechanism is located on the top of the waterproof membrane body. The water seepage mechanism, the limiting structure, the drying structure, and the humidity monitoring sensor are all electrically connected to the controller;

[0007] The water seepage mechanism includes an electric push rod, a water tank, a water valve, and a permeable sponge. The electric push rods are respectively embedded in the front side and the rear side of the right side of the top of the detection table. The electric push rods are electrically connected to the controller. The water tank is bolted to the telescopic end of the electric push rod. The water valve is communicated with the bottom of the water tank. The water valve is electrically connected to the controller. The permeable sponge is fixedly connected to the bottom of the water valve, and the permeable sponge is located on the top of the waterproof membrane body.

[0008] Preferably, the drying structure includes an electric heating tube embedded inside the detection table. A temperature controller is bolted to the left side of the detection table. The temperature controller is electrically connected to the electric heating tube and the controller respectively.

[0009] Preferably, the limiting structure includes electric telescopic rods embedded in both sides inside. The electric telescopic rods are electrically connected to the controller. A limiting plate is bolted to the telescopic end of the electric telescopic rods. The limiting plate is located outside the waterproof membrane body, and the limiting plate is located inside the traction groove.

[0010] Preferably, fixing plates are bolted to the front side and the rear side of the bottom of the water tank. The fixing plates are located on the top of the traction groove, outside the permeable sponge. A water squeezing structure is arranged inside the fixing plates.

[0011] Preferably, the water squeezing structure includes a motor bolted to the front side of the front fixing plate. The output end of the motor penetrates through the front side of the front fixing plate. A lead screw is bolted to the output end of the motor. The rear side of the lead screw penetrates through the front side of the permeable sponge. Pressure plates are threadedly connected to both the front side and the rear side of the surface of the lead screw. A secondary rod is fixedly connected to the rear side of the front fixing plate, and the rear side of the secondary rod penetrates through the front side of the permeable sponge.

[0012] Preferably, a sewage valve is communicated with the front side of the bottom of the detection table. The sewage valve is electrically connected to the controller.

[0013] Preferably, a support rod is bolted to the bottom of the water tank. The bottom of the support rod is fixedly connected to the bottom of the permeable sponge.

[0014] Preferably, a sliding piece is bonded to the inner side of the limiting plate, and the sliding piece is located outside the waterproof membrane body.

[0015] In the technical solution of the present utility model, by setting a detection table, a traction groove, a waterproof membrane body, a controller, a humidity monitoring sensor, a drying structure, a limiting structure and a water seepage mechanism, when performing anti-permeation detection on a building waterproof membrane material, the rolled waterproof membrane body is placed on a conveying device, and then the waterproof membrane body is traction-placed in the traction groove of the detection table and passed through, and then passed through the drying structure and wound around a winding device. The limiting structures on both sides inside the detection table can effectively limit the waterproof membrane body, ensuring its stable position during the detection process and preventing deviation from affecting the detection result. Then, the electric push rod in the water seepage mechanism can adjust the height of the water tank and the permeable sponge as needed, so that the permeable sponge contacts the top of the waterproof membrane body. After the controller controls the water valve to open, the water in the water tank uniformly penetrates into the permeable sponge through the water valve. The permeable sponge is in close contact with the waterproof membrane body, simulating the water penetration situation in actual use. If the anti-permeation performance of the waterproof membrane body is not good, the water will penetrate through the waterproof membrane body to the bottom. At this time, the humidity monitoring sensor located at the bottom of the waterproof membrane body will detect the humidity change and transmit the signal to the controller. After receiving the signal, the controller can intuitively judge whether the anti-permeation performance of the waterproof membrane body meets the standard. After the detection is completed, the drying structure is started by the controller to dry the inside of the detection table, preparing for the next detection. This detection structure is easy to operate, can quickly and accurately perform anti-permeation detection on the rolled waterproof membrane material, reduces the operation process through the coordinated work of each component, improves the detection efficiency, and provides a reliable guarantee for the quality control of building waterproof membrane materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 It is a schematic structural diagram of the detection table of an embodiment of the present utility model;

[0019] Figure 3 It is a schematic structural diagram of the water seepage mechanism of an embodiment of the present utility model;

[0020] Figure 4Schematic diagram of the limit structure according to an embodiment of the present utility model;

[0021] Figure 5 Schematic diagram of the drying structure according to an embodiment of the present utility model;

[0022] Figure 6 Schematic diagram of the water squeezing structure according to an embodiment of the present utility model.

[0023] Explanation of the reference numerals in the attached drawings: 1, detection table; 2, traction groove; 3, waterproof film body; 4, controller; 5, humidity monitoring sensor; 6, drying structure; 601, electric heating tube; 602, temperature controller; 7, limit structure; 701, electric telescopic rod; 702, limit plate; 8, water seepage mechanism; 801, electric push rod; 802, water tank; 803, water valve; 804, permeable sponge; 9, fixing plate; 10, water squeezing structure; 1001, motor; 1002, lead screw; 1003, pressing plate; 1004, auxiliary rod; 11, sewage valve; 12, support rod; 13, sliding piece.

[0024] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the attached drawings. Detailed implementation manners

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, the descriptions such as "first" and "second" in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] Moreover, the technical solutions between the various embodiments of the present utility model can be combined with each other, but it must be based on the premise that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The present utility model provides an anti-permeation detection structure for building waterproof membrane material processing, aiming to solve the problems that when the detection device performs anti-permeation detection on the building waterproof membrane material, the operation process is relatively complicated, not easy to operate, and when the waterproof membrane material is detected in a roll, it is impossible to detect the anti-permeability of the rolled waterproof membrane material with high standards, in a short time and accurately, thus affecting the detection efficiency.

[0030] As Figure 1-6 shown, an anti-permeation detection structure for building waterproof membrane material processing provided by an embodiment of the present utility model includes a detection table 1. Traction grooves 2 are formed in the inner sides of the front and rear of the top of the detection table 1. A waterproof membrane body 3 is arranged inside the traction grooves 2. A controller 4 is arranged on the left side of the detection table 1. A humidity monitoring sensor 5 is arranged at the bottom side inside the detection table 1. The humidity monitoring sensor 5 is located at the bottom of the waterproof membrane body 3. A drying structure 6 is arranged inside the detection table 1. Limiting structures 7 are arranged on both sides inside the detection table 1. The limiting structures 7 are located outside the waterproof membrane body 3. A water seepage mechanism 8 is arranged on the top of the detection table 1. The water seepage mechanism 8 is located on the top of the waterproof membrane body 3. The water seepage mechanism 8, the limiting structures 7, the drying structure 6 and the humidity monitoring sensor 5 are all electrically connected to the controller 4;

[0031] The water seepage mechanism 8 includes an electric push rod 801, a water tank 802, a water valve 803 and a permeable sponge 804. The electric push rods 801 are respectively embedded in the front and rear of the right side of the top of the detection table 1. The electric push rod 801 is electrically connected to the controller 4. The water tank 802 is bolted to the telescopic end of the electric push rod 801. The water valve 803 is communicated with the bottom of the water tank 802. The water valve 803 is electrically connected to the controller 4. The permeable sponge 804 is fixedly connected to the bottom of the water valve 803. The permeable sponge 804 is located on the top of the waterproof membrane body 3.

[0032] In the technical solution of the present utility model, by providing a detection table 1, a traction groove 2, a waterproof membrane body 3, a controller 4, a humidity monitoring sensor 5, a drying structure 6, a limiting structure 7 and a water seepage mechanism 8, when performing an anti-seepage detection on a building waterproof membrane material, the rolled waterproof membrane body 3 is placed on a conveying device, and then the waterproof membrane body 3 is tractioned and placed in the traction groove 2 of the detection table 1 and passed through it, and then passed through a drying structure and wound around a winding device. The limiting structures 7 on both sides inside the detection table 1 can effectively limit the waterproof membrane body 3, ensuring its stable position during the detection process and preventing deviation from affecting the detection result. Then, the electric push rod 801 in the water seepage mechanism 8 can adjust the height of the water tank 802 and the permeable sponge 804 as needed, so that the permeable sponge 804 contacts the top of the waterproof membrane body 3. After the controller 4 controls the water valve 803 to open, the water in the water tank 802 uniformly penetrates into the permeable sponge 804 through the water valve 803. The permeable sponge 804 is in close contact with the waterproof membrane body 3, simulating the water seepage situation in actual use. If the anti-seepage performance of the waterproof membrane body 3 is poor, water will penetrate through the waterproof membrane body 3 to the bottom. At this time, the humidity monitoring sensor 5 located at the bottom of the waterproof membrane body 3 will detect the humidity change and transmit the signal to the controller 4. After receiving the signal, the controller 4 can intuitively judge whether the anti-seepage performance of the waterproof membrane body 3 meets the standard. After the detection is completed, the drying structure 6 is started by the controller 4 to dry the inside of the detection table 1, preparing for the next detection. This detection structure is easy to operate, can quickly and accurately perform anti-seepage detection on the rolled waterproof membrane material, reduces the operation process through the coordinated work of each component, improves the detection efficiency, and provides a reliable guarantee for the quality control of the building waterproof membrane material.

[0033] Among them, please refer to Figure 2 , the drying structure 6 includes an electric heating tube 601 embedded in the inner side of the detection table 1. A temperature controller 602 is bolted to the left side of the detection table 1. The temperature controller 602 is electrically connected to the electric heating tube 601 and the controller 4 respectively. In this embodiment, by providing the electric heating tube 601 and the temperature controller 602, when it is necessary to dry the inside of the detection table 1 after the detection is completed, the electric heating tube 601 is started under the action of the controller 4 to generate heat and dry the inside of the detection table 1. The temperature controller 602 can accurately control the heating temperature of the electric heating tube 601, preventing the humidity monitoring sensor 5 inside the detection table 1 from being damaged due to too high temperature, preparing for the next detection, and improving the detection efficiency.

[0034] Furthermore, please continue to refer to Figure 4, the limiting structure 7 includes electric telescopic rods 701 embedded in both sides of the interior. The electric telescopic rods 701 are electrically connected to the controller 4. A limiting plate 702 is bolted to the telescopic end of the electric telescopic rod 701. The limiting plate 702 is located outside the waterproof film body 3 and inside the traction groove 2. In this embodiment, by providing the electric telescopic rods 701 and the limiting plate 702, during the detection process, the controller 4 controls the telescopic movement of the electric telescopic rods 701, causing the limiting plate 702 to move towards the waterproof film body 3 to limit it. The limiting plate 702 is located inside the traction groove 2 and outside the waterproof film body 3, which can ensure that the waterproof film body 3 maintains a stable position during the detection process, preventing it from shifting, thereby ensuring the accuracy of the detection result. Waterproof film bodies 3 of different widths can achieve precise limiting by adjusting the telescopic length of the electric telescopic rods 701, improving the versatility of the detection structure.

[0035] Please continue to refer to Figure 6 , fixing plates 9 are bolted to the front side and the rear side of the bottom of the water tank 802. The fixing plates 9 are located at the top of the traction groove 2 and outside the permeable sponge 804. A water squeezing structure 10 is arranged inside the fixing plates 9. In this embodiment, by providing the fixing plates 9, the fixing plates 9 are bolted to the front side and the rear side of the bottom of the water tank 802, located at the top of the traction groove 2 and outside the permeable sponge 804, providing an installation basis for the water squeezing structure 10, and at the same time playing a certain role in fixing and supporting the permeable sponge 804, preventing the permeable sponge 804 from being excessively deformed or displaced during the detection process.

[0036] Please refer to Figure 6 , the water squeezing structure 10 includes a motor 1001 bolted to the front side of the front fixing plate 9. The output end of the motor 1001 penetrates through the front side of the front fixing plate 9. A lead screw 1002 is bolted to the output end of the motor 1001. The rear side of the lead screw 1002 penetrates through the front side of the permeable sponge 804. Pressure plates 1003 are threadedly connected to both the front side and the rear side of the surface of the lead screw 1002. A secondary rod 1004 is fixedly connected to the rear side of the front fixing plate 9. The rear side of the secondary rod 1004 penetrates through the front side of the permeable sponge 804. In this embodiment, by providing the motor 1001, the lead screw 1002, the pressure plates 1003, and the secondary rod 1004, during the detection process, when it is necessary to control the water content of the permeable sponge 804, the motor 1001 is started under the action of the controller 4, driving the lead screw 1002 to rotate. The pressure plates 1003 threadedly connected to both the front side and the rear side of the surface of the lead screw 1002 move along the lead screw 1002 under the rotation of the lead screw 1002. Due to the limiting effect of the secondary rod 1004, the pressure plates 1003 can stably squeeze the permeable sponge 804. By adjusting the rotation direction of the motor 1001, the moving direction of the pressure plates 1003 can be controlled to realize the water squeezing operation on the permeable sponge 804, thereby precisely controlling the water content of the permeable sponge 804 and ensuring the stable and reliable effect of the penetration detection on the waterproof film body 3.

[0037] In addition, please refer to Figure 2 , a sewage discharge valve 11 is connected to the front side of the bottom of the detection table 1, and the sewage discharge valve 11 is electrically connected to the controller 4. In this embodiment, by providing the sewage discharge valve 11, when there is accumulated water inside the detection table 1 during or after the detection process, the controller 4 can open the sewage discharge valve 11 to drain the accumulated water in time. This can not only keep the inside of the detection table 1 dry and clean, but also prevent the accumulated water from damaging the detection equipment, ensuring the normal operation and service life of the detection structure.

[0038] In addition, please refer to Figure 3 , a support rod 12 is bolted to the bottom of the water tank 802, and the bottom of the support rod 12 is fixedly connected to the bottom of the permeable sponge 804. In this embodiment, by providing the support rod 12, which connects the bottom of the water tank 802 and the bottom of the permeable sponge 804, it can provide additional support force for the permeable sponge 804, ensuring that the permeable sponge 804 always maintains good contact with the waterproof membrane body 3 during the detection process, ensuring that water can evenly penetrate onto the waterproof membrane body 3, and improving the accuracy and reliability of the detection.

[0039] In addition, please refer to Figure 4 , a sliding piece 13 is adhered to the inner side of the limiting plate 702, and the sliding piece 13 is located outside the waterproof membrane body 3. In this embodiment, by providing the sliding piece 13, which is adhered to the inner side of the limiting plate 702, when the waterproof membrane body 3 contacts the limiting plate 702 during the detection process, the sliding piece 13 can reduce the frictional resistance, prevent the waterproof membrane body 3 from being scratched or worn. At the same time, the smooth surface of the sliding piece 13 also helps the smooth movement of the waterproof membrane body 3, further improving the accuracy and stability of the detection.

[0040] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. An anti - penetration detection structure for the processing of building waterproof membrane materials, characterized in that, The anti - penetration detection structure for the processing of a building waterproof membrane material includes a detection table (1). Traction grooves (2) are formed in the inner sides of the front and rear of the top of the detection table (1). A waterproof membrane body (3) is arranged inside the traction grooves (2). A controller (4) is arranged on the left side of the detection table (1). A humidity monitoring sensor (5) is arranged on the bottom side inside the detection table (1). The humidity monitoring sensor (5) is located at the bottom of the waterproof membrane body (3). A drying structure (6) is arranged inside the detection table (1). Limiting structures (7) are arranged on both sides inside the detection table (1). The limiting structures (7) are located outside the waterproof membrane body (3). A water seepage mechanism (8) is arranged on the top of the detection table (1). The water seepage mechanism (8) is located on the top of the waterproof membrane body (3). The water seepage mechanism (8), the limiting structure (7), the drying structure (6) and the humidity monitoring sensor (5) are all electrically connected to the controller (4). The water seepage mechanism (8) includes an electric push rod (801), a water tank (802), a water valve (803) and a permeable sponge (804). The electric push rods (801) are respectively embedded in the front and rear of the right side of the top of the detection table (1). The electric push rods (801) are electrically connected to the controller (4). The water tank (802) is bolted to the telescopic end of the electric push rod (801). The water valve (803) is communicated with the bottom of the water tank (802). The water valve (803) is electrically connected to the controller (4). The permeable sponge (804) is fixedly connected to the bottom of the water valve (803). The permeable sponge (804) is located on the top of the waterproof membrane body (3).

2. The anti - penetration detection structure for the processing of a building waterproof membrane material according to claim 1, characterized in that, The drying structure (6) includes an electric heating tube (601) embedded inside the detection table (1). A temperature controller (602) is bolted to the left side of the detection table (1). The temperature controller (602) is electrically connected to the electric heating tube (601) and the controller (4) respectively.

3. The anti - penetration detection structure for the processing of a building waterproof membrane material according to claim 1, characterized in that, The limiting structure (7) includes electric telescopic rods (701) embedded in both sides inside. The electric telescopic rods (701) are electrically connected to the controller (4). A limiting plate (702) is bolted to the telescopic end of the electric telescopic rod (701). The limiting plate (702) is located outside the waterproof membrane body (3). The limiting plate (702) is located inside the traction groove (2).

4. A processing anti - penetration detection structure for building waterproof membrane materials according to claim 1, characterized in that, Fixing plates (9) are bolted to the front and rear of the bottom of the water tank (802). The fixing plates (9) are located on the top of the traction groove (2). The fixing plates (9) are located outside the permeable sponge (804). A water squeezing structure (10) is arranged inside the fixing plates (9).

5. The anti - penetration detection structure for the processing of a building waterproof membrane according to claim 4, characterized in that, The water squeezing structure (10) includes a motor (1001) bolted to the front side of the front side fixing plate (9). The output end of the motor (1001) penetrates through the front side of the front side fixing plate (9). A lead screw (1002) is bolted to the output end of the motor (1001). The rear side of the lead screw (1002) penetrates through the front side of the permeable sponge (804). Pressure plates (1003) are threadedly connected to both the front side and the rear side of the surface of the lead screw (1002). A secondary rod (1004) is fixedly connected to the rear side of the front side fixing plate (9). The rear side of the secondary rod (1004) penetrates through the front side of the permeable sponge (804).

6. The anti - penetration detection structure for the processing of a building waterproof membrane material according to claim 1, characterized in that, A sewage discharge valve (11) is communicated with the front side of the bottom of the detection table (1). The sewage discharge valve (11) is electrically connected to the controller (4).

7. The anti-permeability detection structure for the processing of a building waterproof membrane according to claim 1, characterized in that, A support rod (12) is bolted to the bottom of the water tank (802). The bottom of the support rod (12) is fixedly connected to the bottom of the permeable sponge (804).

8. The anti - penetration detection structure for the processing of a building waterproof membrane material according to claim 3, characterized in that, A sliding piece (13) is adhesively bonded to the inner side of the limiting plate (702). The sliding piece (13) is located on the outer side of the waterproof film body (3).

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