Thread limiting arbitrary-angle window alignment method with protection level reaching IP68 level

Abstract

The invention provides a thread limiting any-angle window alignment method with the protection grade reaching IP68 grade, and the method comprises the following steps: the upper part of a cover is matched with a cover cavity, the cover is driven to act through the cover cavity, the cover cavity is of a hollow annular structure, and a cover cavity main shaft is arranged in the cover cavity; a bull gear is mounted at the outer diameter of the cover cavity main shaft above the cover cavity, the bull gear is matched with the matching gear, and the position of the cover is fixed through meshing of the bull gear and the matching gear; a bearing is arranged on the matching gear and connected with a chain wheel through a chain, the chain wheel drives the chain to rotate the bearing, the chain wheel is installed on a motor positioning block, a motor is installed below the chain wheel, and the motor drives the chain wheel to act. A driven wheel is installed below the bearing, and the driven wheel is matched with the large gear to drive the large gear to act.

Description

Technical Field

[0001] The invention belongs to the field of position limiting alignment, and in particular relates to a thread position limiting arbitrary angle window alignment method with a protection level of IP68. Background Art

[0002] The prior art has many shortcomings in the alignment of the screw-limited windows at any angle under such a high protection level. First, since the IP68 level of protection requires the equipment to have extremely high airtightness, this usually means that all openings and interfaces of the equipment must be strictly sealed. Although this sealing treatment effectively prevents the intrusion of water and dust, it also increases the difficulty of alignment. Especially when the window position needs to be adjusted at any angle, the sealing structure often limits the range of movement of the window, making the alignment process complicated and time-consuming.

[0003] Existing alignment methods often rely on mechanical adjustment mechanisms that are prone to wear and loosening after long-term use, affecting the accuracy and stability of alignment. Especially in underwater or humid environments, corrosion and oxidation of metal parts will further aggravate this problem.

[0004] IP68 protection also brings challenges to heat dissipation. Since the inside of the device is strictly sealed, it is difficult to effectively dissipate heat, which is particularly obvious under high-intensity working conditions. Long-term high-temperature operation will not only reduce the performance of the device, but may also shorten its service life. For equipment that requires high-precision alignment, this performance degradation and shortened life are unacceptable.

[0005] The general connection method between the tank body and the shell is screw connection. The structure with screw connection is generally convenient for processing and manufacturing, but it takes time to screw in the assembly process. The human resource cost in today's society is high. The structure with screws is not conducive to cost control, and screws and nuts are easy to fall off. Therefore, this design adopts threaded connection. Although the threaded connection method is difficult to process, the product processed by injection mold is more efficient, and the mold production is a one-time investment. The life of a well-made injection mold can generally reach more than hundreds of thousands of times, which is suitable for products with large orders. Comprehensive considerations, this design greatly improves the efficiency of tank processing (the output per hour is about 50 pieces), saves labor costs during assembly, and improves product profitability.

[0006] Existing technologies face many challenges in aligning screw-limited windows at any angle under IP68 protection, including difficulty in alignment, unstable accuracy, and heat dissipation. Therefore, it is particularly important to develop an efficient, accurate, and stable alignment method that can maintain a high protection level. Summary of the invention

[0007] The present invention proposes a method for aligning a window at any angle with a thread limiter having a protection level of IP68, which solves the technical problem of achieving accurate alignment of a window at any angle with a thread limiter while maintaining a high protection level of IP68. Through the combination of a motor drive and a gear and chain transmission system, the lid and the tank window are accurately aligned, and the high sealing performance of the equipment is maintained.

[0008] The technical solution of the present invention is implemented as follows: a method for aligning a threaded position-limited window at any angle with a protection level of IP68, the method comprising the following steps:

[0009] The lid is matched with the lid cavity above, and the lid is driven to move by the lid cavity. The lid cavity is a hollow annular structure, and a lid cavity main shaft is arranged in the lid cavity. A large gear is installed at the outer diameter of the lid cavity main shaft above the lid cavity, and the large gear is matched with the matching gear. The position of the lid is fixed by meshing the large gear with the matching gear.

[0010] A bearing is arranged on the matching gear, and the bearing is connected to a sprocket through a chain, and the sprocket drives the chain to rotate the bearing, and the sprocket is installed on a motor positioning block, and a motor is installed below the sprocket, and the sprocket is driven by the motor to move; a driven wheel is installed below the bearing, and the driven wheel matches with a large gear to drive the large gear to move;

[0011] A positioning pin is installed at the outer diameter of the lid cavity main shaft above the large gear, and a spring is installed on the side of the positioning pin away from the lid cavity main shaft, and the position of the lid is reset by the positioning pin and the spring;

[0012] Screw the cover and the tank body together normally, rotating clockwise until the end point. The screwing is completed. The protection level of the tank body reaches IP68 after the screwing is completed, and the transparent window on the cover is aligned with the window of the display screen inside the tank body.

[0013] In the design of the transmission mechanism, this solution adopts a combined transmission method of motor, sprocket, chain and gear, which has higher transmission efficiency and accuracy than the traditional mechanical adjustment mechanism. As a power source, the motor can provide stable and controllable torque output, ensuring the stability and accuracy of the cover during rotation. The combination of sprocket and chain not only transmits the power of the motor, but also achieves buffering and stabilization of the transmission process through the tension adjustment function of the chain, avoiding the decrease in alignment accuracy caused by transmission errors.

[0014] In the design of the positioning mechanism, this solution innovatively introduces a combination structure of a positioning pin and a spring. When the lid is rotated to the specified position, the positioning pin can accurately match the positioning hole on the can body, thereby fixing the position of the lid. The spring plays a reset role. When the lid position needs to be adjusted, the elastic force of the spring can push the positioning pin out of the positioning hole, allowing the lid to rotate smoothly. This design not only improves the accuracy of alignment, but also allows the lid to maintain stable alignment performance after multiple uses.

[0015] In addition, the sealing performance is also optimized. By adopting high-precision processing technology and sealing materials, the sealing between the lid and the tank is ensured. During the rotation of the lid, the sealing structure can always maintain a tight fit to prevent the intrusion of water and dust. This design not only meets the IP68 level protection requirements, but also improves the reliability and durability of the equipment.

[0016] Compared with the prior art, the main difference of this technical solution lies in the optimization of the transmission mechanism, positioning mechanism and sealing performance. These improvements and innovations enable this solution to achieve precise alignment of the window at any angle of the thread limit while maintaining a high protection level, thus improving the stability and accuracy of the equipment.

[0017] As a preferred embodiment, a cover film is installed in the middle of the upper part of the cover, a rubber ring is arranged around the lower part of the cover, a display screen is arranged in the middle of the lower part of the cover, the display screen is parallel to the can body, and a thread is arranged on the upper side end surface of the can body, which is matched with the cover through the thread.

[0018] As a preferred embodiment, a silicone ring is arranged in an annular shape above the inner wall of the lid. When the lid and the can body are screwed together, the silicone ring is compressed, causing the silicone ring to deform and fill the gap between the lid and the can body. A silicone ring with a Shore hardness of about 21 degrees is selected. The lid and the can body are matched in size. When the can body and the lid are screwed together, the compression amount of the silicone ring is between 0.3-0.5mm.

[0019] As a preferred embodiment, when the screwing is not in place, the transparent window on the lid is not aligned with the window of the display screen, the silicone ring between the lid and the threaded ring of the tank body is in a non-compressed state, the window is in a non-aligned state, and the tank shell is not completely sealed.

[0020] As a preferred embodiment, the starting zero position of the scale on the cover is the starting point of the thread; the starting zero position of the scale on the tank body is the horizontal position of the bottom edge of the tank body, and when the cover is aligned with the scale of the tank body, the transparent window is aligned with the display screen window; there is one and only one layer of display screen inside the tank body, and when the display screen window is aligned with the transparent window, it only corresponds to the position of one layer of display screen; the tank body is made of transparent material, and when the cover is aligned with the scale of the tank body, the transparent window is aligned with the display screen window.

[0021] As a preferred embodiment, the lid is screwed along the thread of the can body to an end point which is arranged on the side wall of the can body and the lid, and the end point adopts a threaded or non-threaded baffle.

[0022] After adopting the above technical solution, the beneficial effects of the present invention are as follows: the present invention adopts internal and external threads to connect the tank body, avoiding the trouble of locking screws, and matching with silicone rings of suitable materials and softness and hardness, so that the shell protection level reaches IP68, avoiding water ingress into the tank body, greatly saving the later maintenance cost, and is widely applicable to various working conditions, especially groundwater wells, underground wells, and other occasions that require water-related data monitoring. The present invention realizes product shell processing through injection molds (other processing methods cannot guarantee the consistency of the starting point of the thread at a low cost, such as CNC processing of precision threads, but the processing cost of CNC is particularly high and not suitable for mass production). The mold-made products greatly shorten the delivery cycle (the output is about 50 pieces per hour), and save labor costs and capital costs. The mold life reaches hundreds of thousands of times. When the order quantity is huge, the unit price cost of each set of tank bodies will be relatively low, which improves the product profit margin and can ensure the consistency of batch products.

[0023] In terms of the transmission mechanism, the efficiency and accuracy of the transmission are improved by adopting a combined transmission method of motor, sprocket, chain and gear. This design not only makes the cover more stable and accurate during rotation, but also avoids the problem of reduced alignment accuracy caused by transmission error. The alignment accuracy and stability are improved by introducing a combined structure of locating pins and springs. The locating pins can accurately match the locating holes when the cover rotates to the specified position, thereby fixing the position of the cover. The reset function of the spring ensures that the cover can maintain stable alignment performance after repeated use. This design not only improves the reliability of the equipment, but also reduces maintenance costs. This solution ensures a tight fit between the cover and the tank body by adopting high-precision processing technology and sealing materials. This design not only meets the IP68 level protection requirements, but also improves the waterproof and dustproof performance of the equipment. In equipment working in harsh environments, this high sealing can ensure stable operation and extend the service life of the equipment.

[0024] In addition, this technical solution has the advantages of easy operation and maintenance. Through the combination of motor drive and gear and chain transmission system, the precise control of the cover position is achieved. At the same time, due to the use of standardized parts and modular design, the maintenance and replacement of the equipment is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of the explosion of the lid and tank parts of the present invention

[0027] Figure 2 It is a cross-sectional schematic diagram of the lid and the can body of the present invention after being assembled;

[0028] Figure 3 It is a schematic diagram of the screwing direction of the thread in the present invention;

[0029] Figure 4 Schematic diagram of the thread starting point of the lid and the can body of the present invention;

[0030] Figure 5 This is a schematic diagram of the thread engagement completion of the present invention;

[0031] Figure 6 It is a schematic diagram of window alignment in the present invention;

[0032] Figure 7 It is a schematic diagram of the cover cavity in the present invention;

[0033] Figure 8 It is a schematic diagram of the thread demoulding mechanism and the limiting and resetting mechanism in the present invention;

[0034] Fig. 9 It is a schematic diagram of the positioning pin in the present invention.

[0035] In the figure, 1-lid; 2-lid cavity; 3-spring positioning plate; 4-spring; 5-positioning pin; 6-large gear; 7-lid cavity main shaft; 8-bearing; 9-chain; 10-sprocket; 11-motor positioning block; 12-motor; 13-driven wheel, 14-cavity platform, 15-rubber ring, 16-display screen, 17-tank body. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] like Figures 1 to 9 As shown in the figure, the IP68-level threaded limit arbitrary angle window alignment method is a highly precise and reliable mechanical transmission and positioning technology, which is designed to ensure that the sealing performance of electronic equipment or containers reaches the highest standards in extreme environments (such as complete immersion in water), while ensuring that the transparent window on the lid can be accurately aligned with the display window inside the container for easy observation or operation. This method achieves both high-strength sealing performance and precise alignment of the window during the rotation of the lid through a series of precise mechanical structure designs. Its working principle and specific workflow are described as follows.

[0039] The core of this method is to use gear transmission, chain transmission and spring return mechanism to achieve accurate positioning and locking of the cover during rotation. Specifically:

[0040] Matching of the lid and the lid cavity: The lid 1 is designed with a shape that matches the lid cavity 2, so that the lid can move stably along the trajectory of the lid cavity during rotation. The lid cavity 2 is a hollow annular structure, and a lid cavity main shaft 7 is arranged inside as the rotation center to ensure the stability of the lid rotation.

[0041] Gear transmission system: A large gear 6 is installed at the outer diameter of the main shaft 7 of the lid cavity, and the large gear and the matching gear 13 are meshed to achieve transmission. A bearing 8 is installed on the matching gear 13, and the bearing is connected to the sprocket 10 through a chain 9. The sprocket 10 is installed on the motor positioning block 11 and driven by the motor 12. This design allows the motor to drive the large gear 6 to rotate through the chain transmission system, thereby driving the lid 1 to rotate.

[0042] Spring reset mechanism: A positioning pin 5 is installed at the outer diameter of the main shaft 7 of the lid cavity above the large gear 6, and the end of the positioning pin away from the main shaft is connected to the spring 4. The elastic force of the spring keeps the positioning pin in place when there is no external force. When there is an external force (such as after the lid is rotated into place), the positioning pin can move and compress the spring. When the external force disappears, the spring returns to its original state, driving the positioning pin to reset, thereby locking and resetting the lid position.

[0043] The synergy between the driven wheel and the matching gear: A driven wheel 14 is installed under the matching gear 13 (the "driven wheel 13" in the original text may be a typo. Since the matching gear 13 has been mentioned, it is assumed to be the driven wheel 14 here). There is a matching relationship between the driven wheel and the large gear 6, but it is not a direct driving relationship. Instead, it indirectly affects the rotation of the large gear through the chain drive. This design increases the flexibility of the system, allowing the efficiency or accuracy of the gear transmission to be fine-tuned by adjusting the position or parameters of the driven wheel when necessary.

[0044] Window alignment and sealing performance: During the screwing process of the cover 1 and the tank body 17, as the cover rotates, the transparent window gradually approaches and finally aligns with the display window inside the tank body. At the same time, due to the threaded limit design between the cover and the tank body, when the cover rotates to the end, the threaded structure locks the cover tightly on the tank body, forming a high-strength seal to ensure that the protection level reaches IP68.

[0045] The specific usage scenarios are as follows:

[0046] Preparation stage: First, ensure that all parts (including lid, lid cavity, gears, chains, motors, etc.) are installed correctly without looseness or damage. Check whether the spring reset mechanism works properly and whether the positioning pin can move and reset smoothly. Install the display screen inside the tank 17 and ensure that the display screen window is in the alignment state.

[0047] Start the motor: The control system starts the motor 12, which drives the sprocket 10 to rotate through the chain transmission system, and then drives the matching gear 13 and the bearing 8 to rotate. Since the bearing 8 is connected to the large gear 6 through a chain, the large gear also starts to rotate, driving the cover 1 to rotate along the trajectory of the cover cavity 2.

[0048] Rotation and alignment: As the lid 1 rotates, the transparent window gradually approaches the display window inside the tank. During the rotation process, the alignment of the window can be monitored by the control system, and the rotation angle of the lid can be fine-tuned by adjusting the speed or direction of the motor when necessary to ensure accurate alignment of the window.

[0049] Locking and sealing: When the lid 1 rotates to the end point, the threaded limit structure locks the lid tightly on the can body to form a high-strength seal. At this time, the positioning pin 5 in the spring return mechanism is inserted into the preset positioning hole under the action of the spring 4 to lock the lid position and prevent loosening or dislocation caused by external factors (such as water pressure, vibration, etc.).

[0050] Check and confirm: Finally, confirm by visual inspection or using a testing instrument whether the window is fully aligned and whether the sealing performance reaches the IP68 level. After confirmation, the equipment can be put into use for normal observation or operation.

[0051] A cover film 18 is installed in the middle of the upper part of the cover 1, a rubber ring 15 is arranged around the lower part of the cover 1, a display screen 16 is arranged in the middle of the lower part of the cover 1, and the display screen 16 is parallel to the tank body 17. The upper side end surface of the tank body 17 is provided with threads, which match with the cover 1 through the threads.

[0052] In underwater scientific research equipment, it is often necessary to observe the situation inside the container, such as sensor readings, experimental sample status, etc. In this embodiment, the cover film 18 installed in the middle of the upper part of the cover 1 can protect the cover surface from scratches or contamination, and provide identification information, such as equipment model, manufacturer, etc. The rubber ring 15 surrounding the bottom of the cover 1 and the silicone ring arranged in a ring above the inner wall (the embodiment described later) together ensure the high sealing between the cover and the tank body, meeting the IP68 level waterproof and dustproof requirements. The display screen 16 is arranged in the middle of the lower part of the cover, parallel to the tank body 17, so that when the cover is screwed into place, the transparent window can be directly aligned with the display screen, which is convenient for underwater observation. In traditional technology, the sealing between the cover and the tank body often relies on a single rubber ring or O-ring, and the alignment of the display screen and the window relies on manual operation, and the accuracy is difficult to guarantee. This embodiment significantly improves the sealing performance through the double-layer sealing (rubber ring + silicone ring) design; at the same time, by directly integrating the display screen on the cover and designing a precise alignment mechanism, the automatic alignment of the window is realized, which greatly improves the work efficiency and accuracy.

[0053] A silicone ring is arranged in an annular shape above the inner wall of the lid 1. When the lid 1 and the tank body 17 are screwed together, the silicone ring is compressed, causing the silicone ring to deform and fill the gap between the lid 1 and the tank body 17. A silicone ring with a Shore hardness of about 21 degrees is selected. The lid 1 and the tank body 17 are matched in size. When the tank body 17 and the lid are screwed together, the compression amount of the silicone ring is between 0.3-0.5mm.

[0054] In an underwater environment with high pressure and high humidity, the sealing performance of the container is extremely high. Silicone rings are selected as sealing materials due to their excellent elasticity and corrosion resistance. By accurately controlling the compression of the silicone ring, a stable sealing effect can be ensured under different pressures and water depths. This embodiment achieves precise control of the sealing performance and improves the reliability and durability of the equipment by selecting a silicone ring with a specific hardness and strictly controlling the compression between 0.3-0.5mm.

[0055] When the screwing is not in place, the transparent window on the cover 1 is not aligned with the window of the display screen 16, the silicone ring between the cover 1 and the threaded ring of the tank body 17 is in a non-compressed state, the window is in a non-aligned state, and the shell of the tank body 17 is not completely sealed.

[0056] In underwater operations, once the equipment fails, it will be extremely difficult to repair and replace it. Therefore, it is crucial to discover and deal with potential problems in a timely manner. This embodiment enables operators to quickly identify whether the equipment is in normal working condition by designing a status indication when the screwing is not in place. This embodiment enables operators to quickly identify the problem through intuitive status indications (such as misaligned windows, non-compressed silicone rings, etc.), thereby improving the timeliness and accuracy of fault handling.

[0057] The starting zero position of the scale on the cover 1 is the starting point of the thread; the starting zero position of the scale on the tank body 17 is the horizontal position of the bottom edge of the tank body 17. When the cover 1 is aligned with the scale of the tank body 17, the transparent window is aligned with the display screen window; there is only one layer of display screen inside the tank body 17, and when the display screen window is aligned with the transparent window, it only corresponds to the position of one layer of display screen; the tank body 17 is made of transparent material, and when the cover 1 is aligned with the scale of the tank body 17, the transparent window is aligned with the display screen window.

[0058] This embodiment achieves the accuracy of alignment and the intuitiveness of observation by designing a scale alignment mechanism and a transparent tank. At the same time, the design of the transparent tank also enables the operator to directly observe the situation inside the tank without opening the lid, further improving the efficiency and safety of the experiment. In scientific research or teaching experiments, it is often necessary to accurately control the experimental conditions and observe the experimental process in real time. This embodiment enables the operator to easily achieve alignment and observation by designing a scale alignment mechanism and a transparent tank.

[0059] The end point where the lid 1 is screwed along the thread of the tank body 17 to the end point is set on the side wall of the tank body 17 and the lid 1, and the end point adopts a threaded or non-threaded baffle. In situations where it is necessary to strictly control the screwing depth and prevent over-rotation, the end point setting and baffle design are particularly important. By designing the end point baffle, this embodiment ensures that the lid can stop automatically when it is screwed to a predetermined position, avoiding damage or sealing failure caused by over-rotation. By designing the end point baffle and the threaded or non-threaded structure, this embodiment achieves precise control of the screwing depth and automatic stop function, thereby improving the reliability and durability of the equipment. At the same time, the design of the end point baffle also enables the operator to intuitively identify whether the screwing is in place, further improving the operating efficiency and accuracy.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for aligning a threaded window at any angle with a protection level of IP68, characterized in that: The method comprises the following steps: The upper part of the cover (1) matches with the cover cavity (2), and the cover (1) is driven to move by the cover cavity (2); the cover cavity (2) is a hollow annular structure, and a cover cavity main shaft (7) is arranged in the cover cavity (2); a large gear (6) is installed at the outer diameter of the cover cavity main shaft (7) above the cover cavity (2), and the large gear (6) matches with the matching gear (13), and the position of the cover (1) is fixed by the meshing of the large gear (6) and the matching gear (13); A bearing (8) is arranged on the matching gear (13), and the bearing (8) is connected to a sprocket (10) through a chain (9), and the sprocket (10) drives the chain (9) to rotate the bearing (8), and the sprocket (10) is installed on a motor positioning block (11), and a motor (12) is installed below the sprocket (10), and the sprocket (12) is driven by the motor (12) to move; a driven wheel (13) is installed below the bearing (8), and the driven wheel (13) is matched with a large gear (6) to drive the large gear (6) to move; A positioning pin (5) is installed at the outer diameter of the cover cavity main shaft (7) above the large gear (6), and a spring (4) is installed on the side of the positioning pin (5) away from the cover cavity main shaft (7), and the position of the cover (1) is reset by the positioning pin (5) and the spring (6); The cover (1) and the tank body (17) are screwed together normally in a clockwise direction until the screwing reaches the end point. The screwing is completed, and the protection level of the tank body (17) reaches IP68 after the screwing is completed, and the transparent window on the cover (1) and the window of the display screen inside the tank body (17) are in an aligned position.

2. A method for aligning a threaded window at any angle with a protection level of IP68 as claimed in claim 1, characterized in that: A cover film (18) is installed in the middle of the upper part of the cover (1), a rubber ring (15) is annularly surrounded at the lower part of the cover (1), a display screen (16) is arranged at the middle of the lower part of the cover (1), the display screen (16) is parallel to the tank body (17), and a thread is arranged on the upper side end surface of the tank body (17), which matches with the cover (1) through the thread.

3. A method for aligning a threaded window at any angle with a protection level of IP68 as claimed in claim 2, characterized in that: A silicone ring is arranged in an annular shape above the inner wall of the lid (1). When the lid (1) and the tank body (17) are screwed together, the silicone ring is compressed, causing the silicone ring to deform and fill the gap between the lid (1) and the tank body (17). A silicone ring with a Shore hardness of about 21 degrees is selected. The lid (1) and the tank body (17) are matched in size. When the tank body (17) and the lid are screwed together, the compression amount of the silicone ring is between 0.3-0.5 mm.

4. A method for aligning a screw-limited window at any angle with a protection level of IP68 as claimed in claim 1, characterized in that: When the screwing is not in place, the transparent window on the cover (1) is not aligned with the window of the display screen (16), the silicone ring between the cover (1) and the threaded ring of the tank body (17) is in a non-compressed state, the window is in a non-aligned state, and the shell of the tank body (17) is not completely sealed.

5. A method for aligning a screw-limited window at any angle with a protection level of IP68 as claimed in claim 1, characterized in that: The starting zero position of the scale on the cover (1) is the starting point of the thread; the starting zero position of the scale on the tank body (17) is the horizontal position of the bottom edge of the tank body (17); when the scales of the cover (1) and the tank body (17) are aligned, the transparent window is aligned with the display screen window; the display screen inside the tank body (17) has one and only one layer, and when the display screen window is aligned with the transparent window, it only corresponds to the position of one layer of the display screen; the tank body (17) is made of transparent material, and when the scales of the cover (1) and the tank body (17) are aligned, the transparent window is aligned with the display screen window.

6. A method for aligning a screw-limited window at any angle with a protection level of IP68 as claimed in claim 1, characterized in that: The lid (1) is screwed along the thread of the tank body (17) to an end point which is arranged on the side walls of the tank body (17) and the lid (1), and the end point adopts a threaded or non-threaded baffle.

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