Large-size pressure-resistant shell airtightness inspection device and inspection method

Abstract

The invention provides a large-size pressure-resistant shell airtightness testing device and testing method. The testing device comprises a water tank and a pressing frame mechanism. The pressing frame mechanism comprises a pressing frame positioned above the water tank; the pressing frame is arranged below the pressing frame cross beam; the pressing frame cross beam is connected with the pressing frame supporting and rotating mechanism, and the pressing frame supporting and rotating mechanism is used for supporting the pressing frame cross beam and can enable the pressing frame cross beam to rotate in the horizontal direction; and the pressing frame pressing mechanism is arranged between the pressing frame cross beam and the pressing frame and can enable the pressing frame to move up and down relative to the pressing frame cross beam. According to the inspection device, overall airtightness inspection can be visually conducted on the large-size composite material pressure-resistant shell through a visual inspection method, segmented inspection is not needed, the device is simple in structure, convenient to use and low in cost, and the inspection efficiency is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of airtightness inspection of pressure-resistant shells, and particularly relates to a large-size pressure-resistant shell airtight inspection device and an inspection method. Background Art

[0002] A deep submersible is a deep diving device used for underwater observation and underwater operations, and is an indispensable equipment for deep sea exploration and development. A deep sea pressure-resistant cabin is an important part of a deep submersible. In the deep sea environment, the water pressure is high, and the performance and quality requirements of the deep sea pressure-resistant cabin shell are stringent. The manufacturing materials of deep sea pressure-resistant cabins are mainly divided into two types: metal materials and composite materials. Metal material pressure-resistant cabins are mainly used in shallow seas or short-term explorations. With the development of ocean exploration from shallow seas to deep seas, deep sea metal alloy pressure-resistant cabins gradually cannot meet the requirements. Therefore, deep sea composite material pressure-resistant cabins have attracted more and more attention. At present, the research and development and production of large-size composite material pressure-resistant shells under the deep sea have become a trend. Subsequently, the performance testing of such products has also become an important part of their research and development and production. Therefore, the development of various inspection devices supporting the performance testing of such products has also become the focus of the industry. Deep sea pressure-resistant shells need to withstand huge water pressures. Airtightness inspection can detect whether there are tiny cracks or defects in the shell. These cracks or defects are not easily detectable in a normal environment, but may cause the shell to rupture in the deep sea high-pressure environment, thus endangering the safety of equipment or personnel. Therefore, airtightness inspection is a very important process in the production process, and the development of airtightness inspection devices is particularly important.

[0003] With the development trend of large-size composite material pressure-resistant shells and the demand for the diversity of shell diameters, the demand for their airtight inspection devices is also getting higher and higher. It is necessary to not only meet the large size but also have the diversity of use. At present, for the inspection of large-size composite material pressure-resistant shells by traditional simple airtight inspection devices, sectional airtight inspection is usually adopted, which is inconvenient to use and has low inspection efficiency, and can no longer meet the requirements of shell airtight inspection. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a large-size pressure-resistant shell airtight inspection device and an inspection method. The inspection device can visually perform overall airtight inspection on a large-size composite material pressure-resistant shell by visual inspection, without sectional inspection. The device has a simple structure, is convenient to use, has a low cost, and greatly improves the inspection efficiency.

[0005] To solve the above problems, one aspect of the present invention provides a large-size pressure-resistant shell airtight inspection device, including:

[0006] A water tank and a pressure frame mechanism;

[0007] The pressure frame mechanism includes:

[0008] The pressing frame is located above the water tank;

[0009] The pressing frame crossbeam, the pressing frame is arranged below the pressing frame crossbeam;

[0010] The pressing frame support rotation mechanism, the pressing frame crossbeam is connected with the pressing frame support rotation mechanism, and the pressing frame support rotation mechanism is used to support the pressing frame crossbeam and enable the pressing frame crossbeam to rotate in the horizontal direction;

[0011] The pressing frame downward pressing mechanism is arranged between the pressing frame crossbeam and the pressing frame, and can make the pressing frame move up and down relative to the pressing frame crossbeam.

[0012] Preferably, the pressing frame mechanism further includes:

[0013] A plurality of guide rods are arranged at the bottom of the pressing frame crossbeam and are used to guide the up and down movement of the pressing frame relative to the pressing frame crossbeam.

[0014] Preferably, the pressing frame mechanism further includes:

[0015] A plurality of rollers are arranged at the bottom of the pressing frame.

[0016] Preferably, the pressing frame mechanism further includes:

[0017] The locking mechanism is arranged on the pressing frame crossbeam and is used to lock the relative position of the pressing frame crossbeam and the water tank.

[0018] Preferably, it further includes:

[0019] The water tank support frame, and the water tank is arranged in the water tank support frame.

[0020] Preferably, it further includes:

[0021] The drain outlet is arranged at the bottom of the water tank.

[0022] Preferably, multiple groups of the pressing frame mechanisms are provided, and multiple groups of the pressing frame mechanisms are arranged in sequence along the length direction of the water tank.

[0023] Preferably, the roller is made of nylon material.

[0024] Another aspect of the present invention provides a method for airtight inspection of a large-sized pressure-resistant shell, which is completed by using the above-mentioned airtight inspection device for a large-sized pressure-resistant shell, and includes the following steps:

[0025] S1. Inject the liquid for airtight inspection into the water tank, and rotate the pressing frame to one side through the pressing frame support rotation mechanism;

[0026] S2. Place the product to be inspected into the water tank;

[0027] S3. The press frame is rotated by the press frame support rotating mechanism to the top of the product to be inspected, and the press frame is pressed down by the press frame pressing mechanism until the product is completely immersed in the airtight liquid for inspection, and the pressing is stopped and kept still;

[0028] S4. Check whether there are bubbles on the water surface of the product to determine the air tightness of the product.

[0029] Preferably, in step S3, before the press frame is pressed down by the press frame pressing mechanism until the product is completely immersed in the liquid for testing airtightness, the press frame is first pressed down by the press frame pressing mechanism until it contacts the product for pre-tightening, the product to be tested and the press frame are inspected, and the positional relationship between the press frame and the product to be tested is adjusted to ensure that the roller is in contact with the product.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The large-size pressure-resistant shell airtightness inspection device of the present invention can visually inspect the large-size composite pressure-resistant shell as a whole through visual inspection, without segmented inspection. The device has a simple structure, is easy to use, and is low in cost, greatly improving the inspection efficiency, and providing a practical reference for future airtightness inspections of composite pressure-resistant shells of larger sizes. The press frame of the device can also be replaced accordingly according to the different product sizes to adapt to the use of more products, save costs, and improve utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional schematic diagram of a large-size pressure-resistant shell airtightness inspection device according to an embodiment of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the airtightness inspection device for a large-size pressure-resistant shell according to an embodiment of the present invention.

[0034] Among them: 1-water tank; 2-pressing frame; 3-pressing frame beam; 4-pressing frame supporting rotating mechanism; 5-pressing frame pressing mechanism; 6-guide rod; 7-roller; 8-locking mechanism; 9-water tank supporting frame; 10-drain outlet; 11-product to be inspected. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solution 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.

[0036] Example 1

[0037] As Figure 1 , Figure 2 shown, a large - size pressure - resistant shell airtight inspection device described in this embodiment includes:

[0038] a water tank 1 and a pressing frame mechanism;

[0039] The pressing frame mechanism includes:

[0040] a pressing frame 2, located above the water tank 1;

[0041] a pressing frame cross - beam 3, and the pressing frame 2 is arranged below the pressing frame cross - beam 3;

[0042] a pressing frame support and rotation mechanism 4, the pressing frame cross - beam 3 is connected to the pressing frame support and rotation mechanism 4, and the pressing frame support and rotation mechanism 4 is used to support the pressing frame cross - beam 3 and enable the pressing frame cross - beam 3 to rotate in the horizontal direction;

[0043] a pressing frame downward - pressing mechanism 5, arranged between the pressing frame cross - beam 3 and the pressing frame 2, and can make the pressing frame 2 move up and down relative to the pressing frame cross - beam 3.

[0044] When using the large - size pressure - resistant shell airtight inspection device of this embodiment to inspect a product, first inject an appropriate amount of water required for inspection into the water tank, and then rotate the pressing frame to one side through the pressing frame support and rotation mechanism so as to hoist the product to be inspected into the water tank; then place the product 11 to be inspected into the water tank through a crane or hoist, and it floats on the water surface; then rotate the pressing frame to above the product to be detected through the pressing frame support and rotation mechanism, turn on the pressing frame downward - pressing mechanism, and make the pressing frame start to press down until it contacts the product and pre - compresses; then the product to be detected and the pressing frame can be inspected, and the position relationship between the pressing frame and the product to be detected can be adjusted in time to ensure that the pressing frame is in place in contact with the product; after the inspection is completed, turn on the pressing frame downward - pressing mechanism, press down the pressing frame at a uniform speed until the product is completely immersed in water, stop pressing and keep it still; after standing for a period of time, when the water surface in the water tank is stable, carefully observe the water surface situation at each part of the product, and determine whether the airtightness of the product is good by whether there are bubbles emerging; according to this method, repeat the above steps to check the airtightness effect of each position of the product one by one, and mark the problems in time for subsequent maintenance to ensure the quality of the product.

[0045] Compared with the traditional inspection device that needs to conduct segmented airtight inspection on a large - size pressure - resistant shell, the large - size pressure - resistant shell airtight inspection device of this embodiment can visually conduct overall airtight inspection on a large - size composite material pressure - resistant shell through visual inspection, without segmented inspection. The device has a simple structure, is easy to use, has a low cost, greatly improves the inspection efficiency, and provides a practical reference for future airtight inspection of larger - size composite material pressure - resistant shells. The pressing frame of this device can also be replaced accordingly according to the different sizes of products to adapt to the use of more products, save costs and improve utilization rate.

[0046] Preferably, the press frame mechanism further includes:

[0047] A plurality of guide rods 6 are provided at the bottom of the press frame cross beam 3 and are used to guide the up and down movement of the press frame 2 relative to the press frame cross beam 3. Further, the guide rods 6 are vertically arranged and can guide the press frame to move vertically up and down relative to the press frame cross beam. Specifically, guide holes can be provided at corresponding positions on the press frame, and the guide rods are inserted into the guide holes. By providing the guide rods, the press frame can be guided to press down vertically more stably.

[0048] Preferably, the press frame mechanism further includes:

[0049] A plurality of rollers 7 are provided at the bottom of the press frame 2.

[0050] Preferably, the press frame mechanism further includes:

[0051] A locking mechanism 8 is provided on the press frame cross beam 3 and is used to lock the relative position of the press frame cross beam 3 and the water tank 1. By providing the locking mechanism, the position of the press frame can be locked after it rotates in place, preventing the press frame from rotating relative to the water tank and affecting the airtightness inspection.

[0052] Further, the locking mechanism is a screw and a nut, and the position of the press frame and the water tank is fixed by the screw and the nut for locking. The locking mechanism adopts a simple mechanical structure and is realized manually, which can be applied to products of various sizes and is convenient for adjustment and replacement.

[0053] Preferably, it further includes:

[0054] A water tank support frame 9, and the water tank 1 is arranged in the water tank support frame 9. The water tank support frame is used to provide support for the water tank to ensure the stability of the device.

[0055] Preferably, it further includes:

[0056] A drain port 10 is provided at the bottom of the water tank 1. The setting of the drain port can more conveniently discharge the water in the water tank after the inspection is completed.

[0057] Preferably, there are multiple groups of press frame mechanisms, and the multiple groups of press frame mechanisms are arranged in sequence along the length direction of the water tank 1. For a pressure-resistant shell with a longer length, multiple groups of press frame mechanisms can be set to press down different positions of the pressure-resistant shell, which is convenient for overall airtightness inspection of a large-size pressure-resistant shell without the need for segmented inspection.

[0058] Preferably, the roller 7 is made of nylon.

[0059] Preferably, the press frame pressing mechanism is a hydraulic cylinder and a hydraulic cylinder control mechanism, and the up and down movement of the press frame can be controlled more stably through the hydraulic cylinder.

[0060] Preferably, the press frame support and rotation mechanism 4 is specifically a ball bearing.

[0061] Specifically, the water tank is a stainless steel water tank.

[0062] Example 2

[0063] A large-size pressure-resistant shell airtightness inspection method of this embodiment is implemented using the large-size pressure-resistant shell airtightness inspection device of embodiment 1, and specifically includes the following steps:

[0064] 1. First, inject the appropriate amount of water required for inspection into the water tank, and rotate the press frame to one side through the press frame support rotation mechanism so that the product to be inspected can be hoisted into the water tank;

[0065] 2. Place the product to be inspected into the water tank via an overhead crane or a crane and float it on the water surface;

[0066] 3. Use the frame support rotating mechanism to rotate the frame to the top of the product to be inspected, and use the frame pressing mechanism to press the frame down until it contacts the product for pre-tightening. Check the product to be inspected and the frame, adjust the position relationship between the frame and the product to be inspected, and ensure that the roller contacts the product.

[0067] 4. Press the press frame down through the press frame pressing mechanism until the product is completely immersed in the liquid for testing air tightness, stop pressing down, and keep it still;

[0068] 5. After standing for a period of time, when the water level in the water tank is stable, carefully observe the water surface conditions at various locations on the product to determine whether the product's air tightness is good by looking at whether there are bubbles coming out;

[0069] 6. Follow this method and repeat the above steps to check the airtightness of each position of the product one by one, and mark the places with problems in time for subsequent maintenance to ensure the quality of the product.

[0070] 7. After the inspection is completed, the data and actual situation of the inspection process shall be recorded and summarized;

[0071] 8. Drain the water used for inspection in the stainless steel water tank and clean up the site.

[0072] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A large-size pressure-resistant shell airtightness inspection device, characterized in that: include: Water tank and press frame mechanism; The pressing frame mechanism comprises: A press frame, located above the water tank; A press frame crossbeam, wherein the press frame is arranged below the press frame crossbeam; A press frame support rotating mechanism, the press frame cross beam is connected to the press frame support rotating mechanism, the press frame support rotating mechanism is used to support the press frame cross beam and enable the press frame cross beam to rotate in the horizontal direction; The pressing frame pressing mechanism is arranged between the pressing frame cross beam and the pressing frame, and can make the pressing frame move up and down relative to the pressing frame cross beam.

2. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: The pressing frame mechanism also includes: A plurality of guide rods are arranged at the bottom of the press frame cross beam and are used to guide the press frame to move up and down relative to the press frame cross beam.

3. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: The pressing frame mechanism also includes: A plurality of rollers are arranged at the bottom of the pressing frame.

4. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: The pressing frame mechanism also includes: The locking mechanism is arranged on the pressure frame cross beam and is used for locking the relative position between the pressure frame cross beam and the water tank.

5. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: Also includes: A water tank supporting frame, wherein the water tank is arranged in the water tank supporting frame.

6. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: Also includes: The drain outlet is arranged at the bottom of the water tank.

7. The large-size pressure-resistant shell airtightness inspection device according to claim 1 is characterized in that: The pressing frame mechanism comprises multiple groups, and the multiple groups of pressing frame mechanisms are arranged in sequence along the length direction of the water tank.

8. The large-size pressure-resistant shell airtightness inspection device according to claim 3 is characterized in that: The roller is made of nylon.

9. A method for testing the airtightness of a large-size pressure-resistant shell, characterized in that: The method is completed using the large-size pressure-resistant shell airtightness inspection device as claimed in any one of claims 1 to 8, comprising the following steps: S1. Inject liquid into the water tank to test airtightness, and rotate the pressure frame to one side through the pressure frame support rotating mechanism; S2. Place the product to be inspected into the water tank; S3. The press frame is rotated by the press frame support rotating mechanism to the top of the product to be inspected, and the press frame is pressed down by the press frame pressing mechanism until the product is completely immersed in the airtight liquid for inspection, and the pressing is stopped and kept still; S4. Check whether there are bubbles on the water surface of the product to determine the air tightness of the product.

10. The large-size pressure-resistant shell airtightness inspection method according to claim 9, characterized in that: In step S3, before the press frame is pressed down by the press frame pressing mechanism until the product is completely immersed in the liquid for testing airtightness, the press frame is first pressed down by the press frame pressing mechanism until it contacts the product for pre-tightening, the product to be tested and the press frame are inspected, and the positional relationship between the press frame and the product to be tested is adjusted to ensure that the roller is in contact with the product.

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