Hydraulic testing device for aluminum portholes

Abstract

We provide a hydrostatic testing device for aluminum portholes. [Solution] Specifically, the present invention relates to a hydrostatic testing apparatus for checking the leakage phenomenon in aluminum portholes, comprising a jig for fixing the aluminum porthole, and a water tank containing water, configured so that the aluminum porthole fixed by the jig and lowered is immersed in the water. In other words, the apparatus tests for defects in the aluminum porthole by checking the phenomenon of water leaking (leakage) from the aluminum porthole immersed in the water tank, and for more accurate testing, the present invention relates to a hydrostatic testing apparatus for aluminum portholes configured so that the fixed aluminum porthole can move in a total of four directions: forward, backward, left, and right.

Description

Technical Field

[0001] The present invention relates to a hydraulic test device for an aluminum porthole.

[0002] Specifically, it is a hydraulic test device for confirming the leak phenomenon in an aluminum porthole, which includes a jig for fixing the aluminum porthole and a water tank configured such that the aluminum porthole fixed by the jig is immersed as it descends and water is contained therein, and relates to a hydraulic test device for an aluminum porthole.

[0003] That is, it is for confirming the phenomenon (leak) of water leakage from the aluminum porthole immersed in the water tank and testing for defects in the aluminum porthole. For a more accurate test, it relates to a hydraulic test device for an aluminum porthole configured such that the fixed aluminum porthole can move in a total of four directions: forward / backward / left / right.

Background Art

[0004] The shipbuilding industry is a major industry that accounts for about 3% of employment in South Korea's export manufacturing industry, and is a strategic industry that creates synergy through close cooperation with upstream and downstream related industries.

[0005] 90% of the orders in the shipping industry are supplied (based on 2022), 50% of the thick plates in the (downstream) steel industry are consumed, about 90% of world trade, and more than 99% of domestic trade in South Korea are handled by the shipping industry.

[0006] South Korean shipbuilding companies have led the world shipbuilding industry while winning orders for 60% of high - value - added ships and 45.6% of eco - friendly ships (from January to October 2023) after overcoming past slumps.

[0007] South Korea's order backlog is at the highest level since 2011 (39.88 million CGT, October 2023), and has been recovering while occupying more than 30% of the world's order volume since 2017. The global order volume also remains in good condition and is expected to increase by an average of 1.6% per year until 2032.

[0008] In the South Korean domestic market for high-value-added, low-carbon vessels, the gap with China is narrowing, and competitors such as the EU and Japan are securing technology, among other factors, and the country is facing a crisis.

[0009] On the other hand, with the IMO (International Maritime Organization) raising its greenhouse gas reduction target by 100% by 2050, carbon reduction competitiveness, driven by a paradigm shift in the shipbuilding industry, is emerging as a crucial comparative advantage. Furthermore, while South Korea possesses manufacturing and IT capabilities in the digital transformation of smart ships and manufacturing, it faces persistent challenges such as a shortage of skilled personnel and the competitiveness of small and medium-sized shipbuilding companies and the machinery and materials industry.

[0010] On the other hand, marine equipment materials are categorized into blocks, engines, refrigeration materials, electrical / communication equipment, piping, eco-friendly equipment, etc., and the lead time from the shipbuilding company's order to the shipbuilding equipment materials company's sales is approximately 12 to 18 months. An increase in orders is expected due to the upcycling trend in the shipbuilding industry.

[0011] The boom in the shipbuilding industry, leading to increased orders for shipbuilding companies in South Korea, China, and Japan, is acting as a factor in stimulating the external expansion of the shipbuilding machinery and materials industry, a supporting industry. Shipbuilding machinery and materials involve the use of 400 to 700 different types of machinery and materials to build a single ship, accounting for over 50% of the ship's price.

[0012] Due to the diverse types of equipment and materials applied to different ship types and shapes, planned production and product standardization are difficult, resulting in high manufacturing costs per item and hindering improvements in production efficiency.

[0013] Because shipbuilding and machinery materials operate in the variable environment of the sea, strict and conservative quality control standards are applied to durability, corrosion resistance, and safety. It is a demanding industry where shipowners specify a particular market when ordering a vessel. However, the global shipbuilding industry is experiencing environmental changes due to the diversification of marine space utilization and the ICT revolution, along with increased demand for ships, stricter international environmental regulations and ship safety measures, the three major decarbonization core fuels (LNG, ammonia, hydrogen, etc.), and the increase in shipping volume. Therefore, it is necessary to strengthen production capacity to match the booming order market.

[0014] In recent years, the shipbuilding industry has seen continued declines in profitability due to competition with China, the world's leading shipbuilding nation, as it requires simple technical skills to reduce costs and improve productivity through the integration of existing production technologies with the competitiveness of the shipbuilding value chain and the changing environment of the global shipbuilding industry.

[0015] Currently, South Korea's shipbuilding industry is centered on low value-added manufacturing and assembly, and high value-added core machinery and materials are procured through imports and licenses, resulting in a low value-added industrial structure. Therefore, it is necessary to secure technology that is competitive in the marine window sector by analyzing production data and manufacturing processes at the manufacturing site of aluminum portholes for ships, and by developing an automated system for porthole hydraulic pressure testing in the currently simple, labor-intensive process.

[0016] In order to revitalize the shipbuilding industry and secure production capacity and price competitiveness that match order competitiveness, changes in the production methods and working environment for aluminum portholes in the shipbuilding industry are necessary. Furthermore, technological development is required to enhance profitability for sustainable growth and create a stable growth environment for companies.

[0017] On the other hand, ship windows are broadly classified into rectangular windows and portholes, and the materials used are steel and aluminum, which are the main materials used in shipbuilding, but they are generally manufactured using aluminum.

[0018] The number of windows and doors installed on ships varies depending on the size and type of vessel, but for large merchant ships, approximately 40 to 80 are typically installed in the deckhouse. When installed on a ship, the windows and doors must meet the maximum allowable and design pressure requirements for their type, and must also pass strength and watertightness tests.

[0019] The number of designs and the passage of watertightness tests and mechanical strength tests (test pressure and load by design type) within the designs, as stipulated in Chapter 8 of Part 4, "Hull Design," of the Classification and Steel Ship Rules, are mandatory.

[0020] Ship windows and doors, which are used on small and medium-sized vessels and yachts both in Korea and overseas, are received as cast iron materials and require approximately eight stages of processing. In reality, all major processes, including processing, assembly, and hydrostatic testing, are carried out 100% by hand.

[0021] The main processes for manufacturing aluminum portholes for ships are carried out in the following order: 1) receiving the casting material → 2) turning → 3) milling → 4) radial drilling → 5) drilling → 6) polishing → 7) coating → 8) assembly → 9) hydrostatic testing.

[0022] For shipportholes, hydrostatic testing is mandatory for manufacturing, assembly, and processing, as well as for delivery and installation on the ship. Standardization of the testing process is implemented by manually applying the appropriate amount of water and pressure for each porthole type.

[0023] The hydrostatic pressure test of aluminum portholes is performed entirely by hand, following these steps: placing the product on a jig → filling the inside with water → tightening the porthole clamps → applying internal pressure → visually inspecting for leaks (horizontal, vertical, and other leaks) → releasing the clamps → removing the product.

[0024] Since hydrostatic testing is a mandatory requirement for the delivery of portholes, the importance of testing is increasing. The porthole market, which contributes to various industries, is expected to see continued demand and is a high-value-added industry.

[0025] In the current situation, it is necessary to develop related automation technologies for the activation of the shipbuilding and marine industries, the increase in the order volume of top shipbuilding companies, and the strengthening of production capacity due to demands such as large projects of domestic companies in South Korea. Also, at a time when it is necessary to change the production and manufacturing methods of aluminum side windows in the shipbuilding industry to ensure production capacity and price competitiveness that match the order volume and order competitiveness of the shipbuilding industry, such as stable quality assurance, cost reduction, and resolution of the labor shortage of aluminum side windows.

[0026] Therefore, Korean Registered Patent Publication No. 10-2660323 describes an assembly automatic assembly device of a lower adsorption method for enhancing the watertightness and improving the productivity of ship aluminum side windows.

[0027] Conventionally, in the process of manufacturing aluminum side windows, the assembly process is to assemble by applying pressure, and usually, it is carried out manually. Therefore, there is a problem that the assembly is carried out without maintaining a certain pressure. The above technology devised to overcome this can provide a certain pressure using the lower adsorption method and can improve the quality of side windows. It relates to an assembly automatic assembly device of a lower adsorption method for enhancing the watertightness and improving the productivity of ship aluminum side windows.

Prior Art Documents

Patent Documents

[0028]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0029] The object of the present invention is to provide a hydraulic pressure testing device for aluminum portholes for checking the current state of leakage, comprising: a jig for fixing the aluminum porthole; and a water tank containing water, configured so that the aluminum porthole, which is fixed by the jig and descends, is immersed in the water.

[0030] Another object of the present invention is to provide an aluminum porthole hydrostatic testing device configured to allow a fixed aluminum porthole to move in a total of four directions (forward, backward, left, and right) for more accurate testing when testing for defects in an aluminum porthole by observing the phenomenon of water leakage from the aluminum porthole immersed in a water tank. [Means for solving the problem]

[0031] The aluminum porthole hydrostatic testing apparatus according to the present invention was devised to achieve the above-mentioned objectives. [Effects of the Invention]

[0032] The aluminum porthole hydrostatic testing apparatus according to the present invention minimizes the error range in the operation of the cylinder, mounting jig, and product mounting jig, and enables the securing of product adhesion and airtightness by using LM bushings. When performing hydrostatic testing with this jig apparatus for aluminum portholes, it is possible to provide an effect compared to manual testing. [Brief explanation of the drawing]

[0033] [Figure 1] This figure shows a hydraulic pressure testing apparatus for aluminum portholes according to the present invention. [Figure 2] This is a side view of the hydraulic pressure testing apparatus for the aluminum porthole shown in Figure 1. [Figure 3] This figure shows a means for moving an aluminum porthole in a hydraulic pressure testing apparatus for aluminum portholes according to the present invention. [Figure 4] This figure shows an example of a hydraulic pressure testing apparatus for an aluminum porthole, with the means shown in Figure 3 connected. [Modes for carrying out the invention]

[0034] Referring to the attached drawings, the present invention relates to a hydrostatic testing apparatus for aluminum portholes.

[0035] Specifically, the present invention relates to a hydrostatic testing apparatus for confirming leak phenomena in aluminum portholes, comprising a jig for fixing the aluminum porthole, and a water tank containing water, configured such that the aluminum porthole, which is fixed and lowered by the jig, is immersed in the water.

[0036] In other words, this invention relates to a hydraulic pressure testing device for aluminum portholes that tests for defects in aluminum portholes by observing the phenomenon of water leakage from aluminum portholes immersed in a water tank, and for more accurate testing, is configured so that the fixed aluminum portholes can move in a total of four directions: forward, backward, left, and right.

[0037] The hydraulic pressure testing apparatus for aluminum portholes according to the present invention will be described below with reference to the attached drawings.

[0038] Figure 1 shows a hydraulic pressure testing apparatus for an aluminum porthole according to the present invention, and Figure 2 is a side view of the hydraulic pressure testing apparatus for the aluminum porthole shown in Figure 1.

[0039] Furthermore, Figure 3 shows a means for moving the aluminum porthole in the aluminum porthole hydrostatic testing apparatus according to the present invention, and Figure 4 shows an example of an aluminum porthole hydrostatic testing apparatus to which the means in Figure 3 is connected.

[0040] Referring to the attached drawings, the present invention includes a base 10 and a tank 20 configured on one side of the base 10.

[0041] At this time, the tank 20 contains materials for a hydrostatic pressure test of the porthole, but since this is not the main purpose of the present invention, a detailed explanation will be omitted.

[0042] Furthermore, a shaft 11 extends upward from the upper surface of the base 10. The upper plate 30 is then connected to the shaft 11.

[0043] The upper surface of the upper plate 30 is provided with an upper plate bracket 31 having a predetermined shape, and an intermediate plate straight-line guide section 32 that is fastened to the upper plate bracket 31 with bolts or the like, and extends downward through the upper plate 30 for a predetermined length.

[0044] Furthermore, a height adjustment cylinder 40 is connected to the upper surface of the upper plate 30. The height adjustment cylinder 40 is an air cylinder, and the cylinder rod is configured to pass through the underside of the upper plate 30.

[0045] An intermediate plate 50 is formed below the upper plate 30, and the shaft 11 is connected to the intermediate plate 50 by intermediate plate ball bushings 51 at each edge region. The rod of the height adjustment cylinder 40 is also connected to the intermediate plate 50, and the end of the intermediate plate straight-line guide section 32 is also connected to it.

[0046] Therefore, the intermediate plate 50 may move upward or downward under the control of the height adjustment cylinder 40, and in this case, the control is assisted by the intermediate plate ball bush 51 connected to the shaft 11.

[0047] Furthermore, the intermediate plate straight-line guide section 32, which is fixed by the upper plate bracket 31 connected to the upper plate 30, is configured as an antenna bar type or an additional cylinder, and while assisting in the control of the intermediate plate 50 in the up / down direction, it enables the control of the intermediate plate 50 in the up / down direction to be performed in the straight-line direction.

[0048] A first separation rod 52, which extends downward, is fastened to the lower side of the intermediate plate 50 with bolts or the like, and the lower plate 60 is connected to the other end of the first separation rod 52.

[0049] A clamp cylinder 60a is connected to the lower plate 60, and the rod of the clamp cylinder 60a extends downward through the lower plate 60.

[0050] In this case, both the clamp cylinder 60a and the height adjustment cylinder 40 are air cylinders, and a standard FRL module that performs functions such as adjusting the pressure before the main air pressure is inserted into the cylinder may be connected to them.

[0051] Furthermore, a second separation rod 61 extends below the lower plate 60, and the second separation rod 61 extends to and connects with the lower jig 90.

[0052] Furthermore, a lower plate bracket 62 is attached to the upper surface of the lower plate 60, and the upper jig straight-line guide section 63 is attached to the lower plate bracket 62 by tightening bolts or the like.

[0053] The lower end of the upper jig straight-line guidance section 63 is connected to the upper jig 70, and its configuration is such that of an antenna, allowing for length variation.

[0054] Furthermore, as described above, the upper jig 70 is connected to the upper jig straight-line guide unit 63, and the rod of the clamp cylinder 60a is connected to it, so that the upper jig 70 is controlled in the upward / downward direction by the control of the clamp cylinder 60a.

[0055] A clamp plate portion 80 is attached to the lower surface of the upper jig 70 by tightening with multiple bolts, and a plurality of clamps 81 are attached to the clamp plate portion 80 downwards by tightening with bolts.

[0056] The clamp 81 is configured to reach and abut against the upper surface of the lower jig 90.

[0057] With this configuration, when a porthole is placed on the upper surface of the lower jig 90, the upper jig 70 descends, and the clamp 81 abuts against the upper surface of the lower jig 90, fixing the porthole in place so that it does not detach from the lower jig 90.

[0058] The intermediate plate 50 is lowered by the height adjustment cylinder 40, allowing the lower jig 90 and the upper jig 70 to be inserted into the tank 20 so that the test can proceed.

[0059] In this case, a moving mechanism as shown in Figure 3 may be installed on the upper surface of the lower jig 90 in order to place the porthole on the upper surface of the lower jig 90.

[0060] This movement mechanism first includes an up / down control unit 91 which includes a screw 912 coupled between two side walls 911 and a forward / rearward guide body 913 coupled to one side of the screw 912.

[0061] In this case, the connection of the screw 912 may include a bearing to ensure smooth rotation.

[0062] Furthermore, the forward / rear guide body 913 has spiral threads that engage with the spiral threads of the propeller 912 formed on the inner wall surface of the hole through which the propeller 912 passes, and the forward / rear guide body 913 moves upward / downward with respect to the porthole as the propeller 912 rotates.

[0063] At this time, an "L" shaped bracket 92 is formed on the upper side of the guide body 913 of the front / rear control unit 91. The bracket 92 is connected to each of the two front / rear direction guide bodies 913 formed by the two front / rear control units 91, and this connection may be a bolt connection.

[0064] Furthermore, it includes a connecting plate 921 that connects the two brackets 92, with a second screw 922 connected to the other side between the two brackets 92, and a left / right directional guide body 923 connected to the second screw 922.

[0065] At this time, the second screw 922 penetrates the left / right direction guide body 923 and connects them so that the threads interlock, so that the left / right direction guide body 923 moves in the left / right direction by the rotation of the second screw 922.

[0066] At this time, another power source (e.g., a motor) for rotating the screw 912 and the second screw 922 may be further coupled.

[0067] In the case of a motor, it may further include a gear configuration for connecting the motor shaft to the screws 912 and 922.

[0068] In this case, the left / right direction guide body 923 may be made larger in size than the front / rear direction guide body 913.

[0069] This is for attaching a plate portion (not shown) for fixing a porthole to the upper side of the left / right direction guide body 923, and the plate portion is configured to include all means that a normal engineer could foresee for mounting the porthole.

[0070] Therefore, the porthole mounted and fixed to the plate can be moved forward / backward along with the bracket 92 by the upper / lower control unit 91, and the bracket 92 can be moved left / right.

[0071] This allows the porthole, submerged in a water tank, to be moved forward, backward, left, and right underwater, making it possible to more effectively check for water leaks.

[0072] On the other hand, although not shown in the figures, on one side of the left / right direction guide body 923 that connects the plate portion, a "∩" shaped projection is formed on the upper surface of the left / right direction guide body 923 to have a predetermined length, and a hole can be formed inside the projection that penetrates in the longitudinal direction. Furthermore, a connecting bracket is formed on the lower surface of the plate portion to finish both ends of the projection, and a hinge pin is connected between the connecting brackets, with the hinge pin passing through the hole in the projection. At this time, by connecting one or more torsion springs to one side of the hinge pin, the plate portion can rotate by a predetermined angle around the hinge pin as an axis, but the rotation is intermittent due to the torsion springs, and after rotating due to the water in the tank, the plate portion can return to its original horizontal position due to the torsion springs.

[0073] Therefore, when testing for porthole leaks in a tank underwater, the test can be performed more efficiently.

[0074] The above description, made with reference to the drawings, only describes the main aspects of the present invention, and it is clear that various other designs are possible within its technical scope, and that the present invention is not limited to the configuration shown in the drawings.

Claims

[Claim 1] Base (10) and; A tank (20) provided on one side of the base (10) and A shaft (11) extends upward from the upper surface of the base (10); The upper plate (30) connected by the shaft (11); A height adjustment cylinder (40) connected to the upper surface of the upper plate (30); The rod of the height adjustment cylinder (40) is connected to an intermediate plate (50) which is controlled in the upward / downward direction; Below the aforementioned middle plate (50) is a lower plate (60) that is separated and connected by a first separation rod (52); The upper jig (70) is connected to the upper surface of the lower plate (60) and is controlled in the upward / downward direction by the rod of the clamp cylinder (60a) which is connected to the upper surface of the lower plate (60); A lower jig (90) is attached below the lower plate (60) by a second separation rod (61), separating it from the lower jig (90); Includes, On the upper surface of the lower jig (90), A control means capable of controlling the forward / backward / left / right direction of the plate portion on which the porthole is mounted and fixed is coupled to the porthole, and the leak phenomenon is tested by controlling the forward / backward / left / right direction while the porthole is immersed in the tank (20). On the upper surface of the upper plate (30), An upper plate bracket (31) having a predetermined shape; The upper plate bracket (31) is fastened and connected with bolts, and the intermediate plate straight-line guide section (32) extends downward through the upper plate (30) for a predetermined length; The aforementioned intermediate plate (50) is The intermediate plate ball bush (51) connected to the shaft (11) assists in controlling the upward / downward direction. A lower plate bracket (62) is attached to the upper surface of the lower plate (60). The lower plate bracket (62) is connected to the upper jig straight-line guide section (63) by bolt fastening, and the upper jig (70) is connected to it, assisting in the control of the upper jig (70) in the up / down direction to be linear. A clamp plate portion (80) fastened with multiple bolts is attached to the lower surface of the upper jig (70), and a multiple clamp (81) is attached to the lower part of the clamp plate portion (80) by bolt fastening. As the upper jig (70) is controlled to descend, the clamp (81) abuts against the upper surface of the lower jig (90). The control means is A front / rear control unit (91) includes a screw (912) coupled between two side walls (911) and a front / rear guide body (913) coupled to one side of the screw (912); The forward / rear guide body (913) has spiral threads that engage with the spiral threads of the propeller (912) formed on the inner wall surface of the hole through which the propeller (912) passes, so that the forward / rear guide body (913) moves forward / rear with respect to the porthole as the propeller (912) rotates. An "L" shaped bracket (92) is formed on the upper side of the guide body (913) of the front / rear control unit (91), and the bracket (92) is connected to each of the two front / rear direction guide bodies (913) formed by the two front / rear control units (91). It includes a connecting plate (921) that connects two brackets (92), a second screw (922) is connected to the other side between the two brackets (92), and a left / right direction guide body (923) is connected to the second screw (922), The left / right direction guide body (923) is connected to the second screw (922) by passing through it and the threads interlocking, so that the left / right direction guide body (923) moves in the left / right direction by the rotation of the second screw (922). A hydrostatic testing apparatus for aluminum portholes, characterized in that a plate portion for fixing the porthole is included on the upper side of the left / right direction guide body (923), so that the porthole mounted and fixed on the plate portion can be moved in the forward / rear direction together with the bracket (92) by the forward / rear control unit (91), and can be moved in the left / right direction by the bracket (92).

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