Weld joint tightness inspection device

Abstract

The utility model relates to the technical field of weld joint tightness inspection, and particularly discloses a weld joint tightness inspection device which comprises a first inspection groove, a second inspection groove and a third inspection groove. The second inspection groove is arranged on the periphery of the first inspection groove, the third inspection groove is arranged on the periphery of the second inspection groove, the first inspection groove is provided with a first air exhaust hole, and the second inspection groove is provided with a second air exhaust hole; the third inspection groove is provided with a third air exhaust hole; and the lower part of the side wall of the first inspection groove, the lower part of the side wall of the second inspection groove and the lower part of the side wall of the third inspection groove are respectively provided with a sealing assembly. The air leakage detection device can improve the accuracy of judging whether air leakage of equipment comes from the air leakage of the equipment or not, improves the reliability and the accuracy of detection data, has the advantages of good weldability, plasticity and durability and the like due to the adoption of metal materials such as aluminum plates, and remarkably improves the collision resistance and prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of weld tightness inspection technology, and specifically to a weld tightness inspection device. Background Technology

[0002] During navigation, ships are exposed to various environmental factors such as waves, wind, and corrosion, which can lead to damage or malfunctions in the hull structure, equipment, and systems. Welds, as critical structural connections, directly affect the ship's safety and normal operation. Therefore, regular ship maintenance inspections and weld tightness checks are necessary. On the one hand, this allows for the timely detection and repair of problems in the hull's welded areas, ensuring the integrity and sealing of the ship's structure and guaranteeing navigational safety. On the other hand, it extends the service life of equipment and systems, reducing repair and replacement costs caused by weld problems. Furthermore, timely detection and resolution of weld tightness issues can prevent downtime and delays due to equipment failure, improving the ship's operational efficiency.

[0003] Currently, a non-sealed compartment weld tightness inspection device made of plexiglass is generally used. This device consists of a cover with a ring of sealant at the bottom. In use, the device is attached to the weld seam to be inspected, and then a vacuum is drawn into the cavity inside the cover. The cover is then pressed against the hull wall by atmospheric pressure. Pressure changes are monitored using a pressure gauge on the cover to determine the weld tightness. However, long-term practical application of this method has revealed the following technical problems: because shipyards are built near the sea, the sealant in the cover is prone to corrosion and weathering from sea winds, resulting in micro-cracks that are difficult to detect during weld tightness inspection. Furthermore, it is difficult to effectively determine whether the pressure change inside the cover originates from the weld or a problem with the cover's own tightness, leading to inaccurate test results. Utility Model Content

[0004] This invention provides a weld tightness inspection device to solve the technical problems existing in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A weld tightness inspection device includes a first inspection groove, a second inspection groove, and a third inspection groove; the second inspection groove is disposed on the outer periphery of the first inspection groove, and the first inspection groove and the second inspection groove form a U-shape or annular shape; the third inspection groove is disposed on the outer periphery of the second inspection groove, and the second inspection groove and the third inspection groove form a U-shape or annular shape; the first inspection groove is provided with a first vent hole, the second inspection groove is provided with a second vent hole, and the third inspection groove is provided with a third vent hole; sealing assemblies are respectively provided on the lower part of the sidewall of the first inspection groove, the lower part of the sidewall of the second inspection groove, and the lower part of the sidewall of the third inspection groove.

[0007] Optionally, the first inspection tank is equipped with a first air pressure detection device, the second inspection tank is equipped with a second air pressure detection device, and the third inspection tank is equipped with a third air pressure detection device.

[0008] Optionally, a plurality of first reinforcing ribs are provided between the first inspection groove and the second inspection groove; and a plurality of second reinforcing ribs are provided between the second inspection groove and the third inspection groove.

[0009] Optionally, the sealing assembly includes an inner sealing ring and an outer sealing ring, with a pre-made groove between the inner sealing ring and the outer sealing ring; an airbag is disposed in the pre-made groove; the cross-section of the airbag is convex.

[0010] Optionally, the airbag cushion includes a support frame, the support frame includes an outer side wall and an inner side wall, the outer side wall and the inner side wall are connected by an elastic element; an elastic membrane is provided at the lower part of the outer side wall and the inner side wall; the inner cavity of the airbag cushion is filled with gas.

[0011] Optionally, the inner and outer sides of the elastic membrane extend below the inner and outer sealing rings. Optionally, a top layer membrane is provided on the upper part of the outer sidewall and the inner sidewall.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model, by setting up a first inspection groove, a second inspection groove and a third inspection groove, can improve the accuracy of judging whether the air leakage originates from the equipment itself by comparing the changes of the three air pressure values, and improve the reliability and accuracy of the test data.

[0014] 2. Aluminum plates and other metal materials are preferred as the frame of this device, and the top is sealed with transparent materials such as plexiglass. The metal materials used in this scheme have advantages such as good weldability, plasticity, and durability, which improves the impact resistance and service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a top view of the weld tightness inspection device of this utility model;

[0017] Figure 2 This is a bottom view of the weld tightness inspection device of this utility model;

[0018] Figure 3 This is a cross-sectional view of the weld tightness inspection device of this utility model;

[0019] Figure 4 This is a cross-sectional view of the airbag cushion of this utility model;

[0020] Figure 5 This is a cross-sectional view of the airbag cushion of this utility model after it has been assembled onto the side wall 7;

[0021] Figure 6 yes Figure 5 A schematic diagram of the structure in contact with the object being detected;

[0022] Figure 7 yes Figure 6 A schematic diagram of the structure of the weld tightness inspection device after negative pressure is applied. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] A weld tightness inspection device, such as Figures 1-7 As shown, the system includes a first inspection groove 13, a second inspection groove 18, and a third inspection groove 19. The second inspection groove 18 is disposed on the outer periphery of the first inspection groove 13, and the first inspection groove 13 and the second inspection groove 18 form a U-shape or annular shape. The third inspection groove 19 is disposed on the outer periphery of the second inspection groove 18, and the second inspection groove 18 and the third inspection groove 19 form a U-shape or annular shape. The first inspection groove 13 is provided with a first air extraction hole 8, and a first valve is provided on a first connecting pipe connected to the first air extraction hole 8. The second inspection groove 18 is provided with a second air extraction hole 9, and a second valve is provided on a second connecting pipe connected to the second air extraction hole 9. The third inspection groove 19 is provided with a third air extraction hole 10, and a third valve is provided on a third connecting pipe connected to the third air extraction hole 10. Sealing assemblies are respectively provided on the lower part of the side wall of the first inspection groove 13, the lower part of the side wall of the second inspection groove 18, and the lower part of the side wall of the third inspection groove 19.

[0027] Optionally, the first inspection slot 13 is equipped with a first air pressure detection device, which can be a barometer 5 or a barometer; the second inspection slot is equipped with a second air pressure detection device, which can be a barometer 4 or a barometer; and the third inspection slot is equipped with a third air pressure detection device, which can be a barometer 3 or a barometer. Using a barometer is preferable, especially one with a time display / coordinate correspondence for real-time air pressure readings, which facilitates result analysis by technicians during actual monitoring operations. In contrast, using a traditional barometer requires technicians to manually check the time and simultaneously record three air pressure values ​​during the inspection process.

[0028] Optionally, a plurality of first reinforcing ribs 12 are provided between the first inspection groove 13 and the second inspection groove 18; a plurality of second reinforcing ribs 11 are provided between the second inspection groove 18 and the third inspection groove 19.

[0029] Optional, such as Figures 2-4As shown, the sealing assembly includes a first sealing assembly 15 disposed at the lower part of the side wall 7 of the first inspection groove 13, a second sealing assembly 17 disposed at the lower part of the side wall 6 of the second inspection groove 18, and a third sealing assembly 21 disposed at the lower part of the side wall 1 of the third inspection groove 19. In this embodiment, the first, second, and third sealing assemblies have the same structure, including an inner sealing ring 22 and an outer sealing ring 20. The inner sealing ring 22 and the outer sealing ring 20 can be selected from common sealing materials such as rubber and silicone. A pre-made groove 14 is provided between the inner sealing ring 22 and the outer sealing ring 20. An airbag is provided in the pre-made groove 14. The cross-section of the airbag is convex. During manufacturing, the side walls 1, 6, and 7 can preferably be made of aluminum plate metal as the skeleton of the device, and then the top is sealed with a transparent material such as plexiglass. With this scheme, the metal material has advantages such as good weldability, plasticity, and durability, which improves the impact resistance and service life.

[0030] Optional, such as Figure 4 As shown, the airbag cushion includes a support frame, which includes an outer side wall 23 and an inner side wall 26. The outer side wall 23 and the inner side wall 26 are preferably made of rigid material. The outer side wall 23 and the inner side wall 26 are connected by elastic elements 24, such as multiple elastic elements 24 arranged alternately. An elastic membrane 16 is provided at the lower part of the outer side wall and the inner side wall. The elastic membrane 16 refers to a stretchable membrane with good extensibility, such as preferably a latex membrane. The inner cavity of the airbag cushion is filled with gas. In this embodiment, a top layer membrane 25 made of a stretchable membrane is used to seal the top of the outer side wall 23 and the inner side wall 26. Its function is that when the elastic membrane 16 is compressed, the air pressure in the inner cavity of the airbag cushion increases, thereby causing the top layer membrane 25 to bulge and reduce pressure, further improving the adhesion between the elastic membrane 16 and the contact surface of the object being detected 27.

[0031] Optionally, the inner and outer sides of the elastic membrane 16 extend below the inner sealing ring and the outer sealing ring.

[0032] The function of the elastic membrane 16 in this embodiment is as follows: Figure 6 As shown, conventional sealing materials such as rubber lose flexibility after long-term use. For the surface of the object 27 being tested (microscopically, the surface of a ship's hull is a non-smooth, uneven surface), the elastic membrane 16, which is inflated within the cavity, achieves the following: Figure 6 The filling effect shown can also be observed during the negative pressure extraction process, as shown in the image. Figure 7 As shown, sealing bulges 28 are gradually formed at the inner and outer ends, which further improves the airtightness caused by the long-term use of conventional sealing rings. In this embodiment, the airbag pad is detachable, and the elasticity of the elastic element 24 is beneficial for disassembly and assembly operations as well as for fixing the airbag pad.

[0033] This device is used to inspect the tightness of welds, and the steps are as follows:

[0034] (1) Cover the weld tightness inspection device on the object to be inspected, and the first inspection groove corresponds to the weld to be inspected;

[0035] (2) Connect the vacuum pipe to the first connecting pipe, open the first valve, and evacuate the first test tank;

[0036] (3) Simultaneously apply negative pressure to the second and third inspection tanks; during the negative pressure application process, such as Figures 6-7 As shown, the inner and outer sides of the elastic membrane 16 bulge and seal the bulge 28 due to the gradual decrease of external air pressure, further improving the tightness of the contact surface between the lower part of the sidewall 7 and the detection object 27.

[0037] (4) After stopping the pumping, close the first valve, the second valve and the third valve to obtain the negative pressure values ​​of the second test tank and the third test tank being equal, which is A, and the negative pressure value of the first test tank being B, and A > B;

[0038] (5) Observe the changes in air pressure values ​​in the first, second and third test tanks over time;

[0039] (6) Analyze and judge the weld tightness based on the changes in the three sets of air pressure values.

[0040] Optionally, in step (3), the second air extraction hole of the second inspection tank is connected to the third air extraction hole of the third inspection tank, and then the air extraction pipe (equipped with a main air valve) is connected together to draw negative pressure. After reaching the set value, the main air valve is closed, and then the second valve and the third valve are closed to close the second air extraction hole and the third air extraction hole, so that the second inspection tank and the third inspection tank are independent of each other.

[0041] Optionally, the analysis and judgment in step (6) includes:

[0042] (1) If the air pressure value in the first inspection tank does not change in the end, it is judged that the weld is in good condition;

[0043] (2) If the air pressure value in the first inspection tank increases and the air pressure value in the second inspection tank does not fluctuate, it is judged that the weld tightness is insufficient.

[0044] (3) If the air pressure in the first test chamber increases and the air pressure in the second test chamber decreases, it is determined that the test device itself has a tightness problem, and the test is invalid.

[0045] (4) Other situations, such as: if the air pressure value in the first inspection tank increases, and the air pressure value in the second inspection tank does not fluctuate, while the air pressure value in the third inspection tank increases, it is judged to be situation (2), that is, insufficient weld tightness.

[0046] Using the above testing scheme, the functions of setting the first inspection slot 13, the second inspection slot 18, and the third inspection slot 19 are as follows:

[0047] Combination Figure 2 Analysis: Accurate judgment can be obtained by observing the changes in the air pressure values ​​of the first inspection slot 13, the second inspection slot 18, and the third inspection slot 19. If the air pressure in the first inspection slot 13 increases, the air pressure in the second inspection slot 18 decreases, while the air pressure in the third inspection slot 19 remains unchanged, then the leak in this test may originate from the first sealing assembly 15, and the technician should be instructed to remeasure. The third inspection slot 19 acts as a barrier against external air pressure. If the air pressure in the third inspection slot 19 increases, it is necessary to consider the air pressure changes in the second inspection slot 18 over time to determine whether the leak is from the third sealing assembly 21, the first sealing assembly 15, or the second sealing assembly 17. If the increase in the air pressure in the third inspection slot 19 is caused by a leak in the first sealing assembly 15 or the second sealing assembly 17, then this experiment is valid, and the weld tightness is determined to be insufficient. Other situations cannot be described in this embodiment.

[0048] In some embodiments, the weld tightness inspection device can be used to inspect the weld tightness. The air pressure value of the first inspection groove 13 can be a, the air pressure value of the second inspection groove 18 can be b, and the air pressure value of the third inspection groove 19 can be c. The air pressure can be selected as atmospheric pressure > c > b > a, and the air pressure value can be gradually reduced from the outer layer to the inside. This reduces the possibility of air leakage in the device itself, reduces repetitive operations, improves work efficiency, and if there is any leakage, the reliability of the test data can be directly judged by the c value and b value.

Claims

1. A weld tightness inspection device, characterized in that: It includes a first inspection slot, a second inspection slot, and a third inspection slot; The second inspection groove is disposed on the outer periphery of the first inspection groove, and the first inspection groove and the second inspection groove form a U-shape or annular shape; the third inspection groove is disposed on the outer periphery of the second inspection groove, and the second inspection groove and the third inspection groove form a U-shape or annular shape; the first inspection groove is provided with a first air extraction hole, the second inspection groove is provided with a second air extraction hole, and the third inspection groove is provided with a third air extraction hole; sealing assemblies are respectively provided on the lower part of the side wall of the first inspection groove, the lower part of the side wall of the second inspection groove, and the lower part of the side wall of the third inspection groove.

2. The weld tightness inspection device according to claim 1, characterized in that: The first inspection tank is equipped with a first air pressure detection device, the second inspection tank is equipped with a second air pressure detection device, and the third inspection tank is equipped with a third air pressure detection device.

3. The weld tightness inspection device according to claim 1, characterized in that: A plurality of first reinforcing ribs are provided between the first inspection groove and the second inspection groove; a plurality of second reinforcing ribs are provided between the second inspection groove and the third inspection groove.

4. The weld tightness inspection device according to claim 1, characterized in that: The sealing assembly includes an inner sealing ring and an outer sealing ring, with a pre-made groove between the inner sealing ring and the outer sealing ring; an airbag is disposed in the pre-made groove; the cross-section of the airbag is convex.

5. The weld tightness inspection device according to claim 4, characterized in that: The airbag cushion includes a support frame, which includes an outer side wall and an inner side wall, and the outer side wall and the inner side wall are connected by an elastic element; an elastic membrane is provided at the lower part of the outer side wall and the inner side wall; the inner cavity of the airbag cushion is filled with gas.

6. The weld tightness inspection device according to claim 5, characterized in that: The elastic membrane extends to the inner and outer sides below the inner and outer sealing rings.

7. The weld tightness inspection device according to claim 5, characterized in that: A top layer membrane is provided on the upper part of the outer side wall and the inner side wall.

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