Novel marine fuel tank double-layer vacuum tube test device

Abstract

The utility model discloses a novel marine fuel tank double-layer vacuum tube test device, which comprises a fuel tank body and a vacuum tube positioned in the fuel tank body, the vacuum tube is subjected to an air tightness test through a test mechanism, the test mechanism comprises a pressure-resistant test tool and a collector, and the pressure-resistant test tool is connected with the collector through a connecting mechanism. The connecting mechanism comprises a connecting flange, the connecting flange comprises a lower flange and an upper flange, the upper flange is fixedly connected with the top end of the collector, and the upper flange is provided with a double-wall pipe helium leak detection connector. According to the novel marine fuel tank double-layer vacuum tube test device, mutual switching among different test items can be easily achieved through the connecting flanges, and when the device is installed through the connecting flanges, the upper flange and the lower flange can be rapidly fixed through cooperation of the fixing assemblies; and the fixing tightness degree of the fixing assembly can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of marine fuel tank testing technology, specifically a novel marine fuel tank double-layer vacuum tube testing device. Background Technology

[0002] To improve the insulation performance of marine fuel tanks, the liquid phase piping on the tank body is usually designed with a double-layer vacuum structure. One end of the double-layer vacuum pipe is connected to the inner cylinder, and the other end is connected to the root valve on the outside of the outer shell head. The piping between these two sections is located within the vacuum jacket of the tank body, which requires the double-layer vacuum pipe to have a certain degree of tightness.

[0003] The patent publication number CN210442045U discloses a high-efficiency airtightness testing device, which includes a housing, a central controller connected to the right side of the housing by screws, a glass cylinder installed at the center of the top of the housing, a sealing cap inserted into the top of the glass cylinder, a pressure relief valve screwed to the top of the sealing cap, a vacuum pump connected to the front side of the inner cavity of the housing by screws along the left and right direction, and a vacuum tube screwed to the top of the left side of the vacuum pump.

[0004] As shown in the above technology, when using existing vacuum tube testing equipment, the arrangement of the fuel tank nozzles must correspond to the PID, so the positions of the pipelines are not adjacent to each other. When testing double-layer vacuum pipelines, they are often tested one by one, which is cumbersome and time-consuming. Temporary plugs need to be welded before the test, and the temporary plugs need to be cut off after the test, which is costly. Moreover, the plugs are often not reusable after one use, which also causes a lot of waste of resources. Different connection tooling flanges need to be switched when conducting different tests, which is time-consuming and labor-intensive. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a novel testing device for double-layer vacuum tubes in marine fuel tanks, which solves the problem of inconvenient operation of existing testing devices for double-layer vacuum tubes in marine fuel tanks.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel double-layer vacuum tube testing device for marine fuel tanks, comprising a fuel tank body and a vacuum tube located inside the fuel tank body. The vacuum tube undergoes an airtightness test via a testing mechanism. The testing mechanism includes a pressure testing fixture and a collector, which are connected by a connecting mechanism. The connecting mechanism includes:

[0007] A connecting flange, comprising a lower flange and an upper flange, wherein the upper flange is fixedly connected to the top of the collector and a double-walled tube helium leak detection connector is provided on the upper flange, and the lower flange is fixedly connected to the bottom of the pressure test fixture.

[0008] The fixing components are arranged in multiple sets along the circumference of the lower flange and the upper flange. The fixing components are used to fix the lower flange and the upper flange. The fixing components include a middle pipe, an adjusting bolt and a T-shaped rod. Pulling the T-shaped rod so that the T-shaped rod presses against the lower flange can complete the fixing. Rotating the adjusting bolt can adjust the tightness of the fixing.

[0009] Preferably, the fixing component further includes a plurality of mounting holes formed in the lower flange and the upper flange, two first limiting grooves formed on the inner wall of the mounting holes, a circular groove formed on the top of the lower flange, and two second limiting grooves formed on the inner wall of the circular groove, and the positions of the two second limiting grooves are staggered from the two first limiting grooves.

[0010] Preferably, the intermediate tube is inserted into the mounting hole, the adjusting bolt is threaded to one end of the intermediate tube, and the T-shaped rod is movably connected to the other end of the intermediate tube. A rotating ring is rotatably connected to the bottom of the end of the adjusting bolt, and a limit spring is fixedly connected between the rotating ring and the T-shaped rod.

[0011] Preferably, two limiting blocks are fixedly connected to the surface of the T-shaped rod, so that the T-shaped rod cannot rotate after the limiting blocks enter the second limiting groove, and a handle is fixedly connected to the bottom of the limiting blocks.

[0012] Preferably, the testing mechanism further includes a testing mechanism pipe end and system piping;

[0013] The test mechanism tube end has one end welded to the vacuum tube and the other end connected to the system pipeline through a connecting joint. A plug plate is welded to the connection end between the vacuum tube and the test mechanism tube end. A connecting joint is connected to the test mechanism tube end.

[0014] The system piping is connected at one end to the vacuum tube and at the other end to the collector.

[0015] Preferably, the manifold is connected to the system piping, and the top of the manifold is connected to pressure resistance, airtightness or helium leak detection test fixtures via a connecting flange.

[0016] Beneficial effects

[0017] This invention provides a novel testing device for double-walled vacuum tubes used in marine fuel tanks. Compared with existing technologies, it offers the following advantages:

[0018] 1. This novel marine fuel tank double-walled vacuum tube testing device is connected to one end of the intermediate tube by adjusting bolts and movably connected to the other end of the intermediate tube by T-shaped rods. The bottom of the adjusting bolt end is rotatably connected to a rotating ring. Different test items can be easily switched through the connecting flange. When installing through the connecting flange, the upper and lower flanges can be quickly fixed by the cooperation of the fixing components, and the tightness of the fixing components can be adjusted.

[0019] 2. This new type of marine fuel tank double-layer vacuum tube testing device has one end welded to the vacuum tube and the other end connected to the system pipeline via a connecting joint. A plug is welded to the connection end between the vacuum tube and the testing device, and a connecting joint is connected to the testing device. All vacuum tubes on the tank are connected into a system, and pressure resistance, airtightness, and helium leak detection tests can be completed in one operation, greatly improving work efficiency. Before the test, the device is welded to the vacuum tube and connected to the connecting pipe of the testing device. After the test, the device is cut off. In this way, the testing device can be repeatedly used, greatly reducing material consumption and waste. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the connection status of the experimental device of this utility model;

[0021] Figure 2 This is a schematic diagram of the appearance of the present utility model;

[0022] Figure 3 This is a structural schematic diagram of the present invention, specifically a cross-sectional view of the connecting flange.

[0023] Figure 4 This is a top view of the pressure testing fixture of this utility model;

[0024] Figure 5 This is a schematic diagram of the tube end of the testing mechanism of this utility model;

[0025] Figure 6 This is a schematic diagram of the connecting flange of this utility model;

[0026] Figure 7 This is a bottom view of the side orientation of the connecting flange of this utility model;

[0027] Figure 8 This is an exploded view of the fixing component of this utility model.

[0028] In the diagram: 1. Fuel tank body; 2. Vacuum tube; 3. Pressure test fixture; 4. Collector; 5. Connecting flange; 51. Lower flange; 52. Upper flange; 6. Fixing assembly; 61. Mounting hole; 62. First limiting groove; 63. Circular groove; 64. Second limiting groove; 65. Intermediate tube; 66. Adjusting bolt; 67. T-shaped rod; 68. Limiting block; 69. Handle; 610. Rotating ring; 611. Limiting spring; 7. Test mechanism tube end; 8. Connecting joint; 9. Blocking plate; 10. System piping. Detailed Implementation

[0029] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-8 The new marine fuel tank double-walled vacuum tube testing device offers two technical solutions:

[0031] The first embodiment includes a fuel tank body 1 and a vacuum tube 2 located inside the fuel tank body 1. The vacuum tube 2 undergoes an airtightness test through a testing mechanism. The testing mechanism includes a pressure testing fixture 3 and a collector 4. The pressure testing fixture 3 and the collector 4 are connected by a connecting mechanism, which includes:

[0032] The connecting flange 5 includes a lower flange 51 and an upper flange 52. The upper flange 52 is fixedly connected to the top of the collector 4, and a double-walled tube helium leak detection joint is provided on the upper flange 51. The lower flange 51 is fixedly connected to the bottom of the pressure test fixture 3.

[0033] The fixing assembly 6 has multiple sets arranged circumferentially along the lower flange 51 and the upper flange 52. The fixing assembly 6 is used to fix the lower flange 51 and the upper flange 52. The fixing assembly 6 includes an intermediate tube 65, adjusting bolts 66 and T-shaped rods 67. Pulling the T-shaped rods 67 so that they press against the lower flange 51 completes the fixing. Rotating the adjusting bolts 66 can adjust the tightness of the fixing. The fixing assembly 6 also includes multiple mounting holes 61 opened in the lower flange 51 and the upper flange 52. Two first limiting grooves 62 are opened on the inner wall of the mounting holes 61. A circular groove 63 is opened on the top of the lower flange 51, and two limiting grooves are opened on the inner wall of the circular groove 63. The second limiting groove 64 is offset from the two first limiting grooves 62. The intermediate tube 65 is inserted into the mounting hole 61. The adjusting bolt 66 is threaded to one end of the intermediate tube 65, and the T-shaped rod 67 is movably connected to the other end of the intermediate tube 65. The bottom of the end of the adjusting bolt 66 is rotatably connected to a rotating ring 610. A limiting spring 611 is fixedly connected between the rotating ring 610 and the T-shaped rod 67. Two limiting blocks 68 are fixedly connected to the surface of the T-shaped rod 67. After the limiting blocks 68 enter the second limiting groove 64, the T-shaped rod 67 cannot rotate. A handle 69 is fixedly connected to the bottom of the limiting block 68.

[0034] The connection flange 5 allows for easy switching between different test items. When installing via the connection flange 5, the upper and lower flanges can be quickly fixed by the fixing component 6, and the tightness of the fixing component 6 can be adjusted.

[0035] The second implementation differs from the first implementation in that the test mechanism further includes a test mechanism tube end 7 and a system pipeline 10. One end of the test mechanism tube end 7 is welded to the vacuum tube 2, and the other end is connected to the system pipeline 10 through a connecting joint. A plug plate 9 is welded to the connection end between the vacuum tube 2 and the test mechanism tube end 7, and a connecting joint 8 is connected to the test mechanism tube end 7. One end of the system pipeline 10 is connected to the vacuum tube 2, and the other end is connected to the collector 4. The collector 4 is connected to the system pipeline 10, and the top of the collector 4 is connected to the pressure resistance, airtightness, or helium leak detection test fixtures through a connecting flange 5.

[0036] By connecting all the vacuum tubes 2 on the tank into a system, the pressure resistance, airtightness, and helium leak detection tests can be completed in one operation, which greatly improves work efficiency. Before the test, this device is welded to the vacuum tube 2 and the test device is connected to the pipe. After the test, the device is cut off. In this way, the test device can be repeatedly used, greatly reducing material consumption and waste.

[0037] In use, connect the test mechanism tube end 7 to the vacuum tube 2, so that the vacuum tube 2, the manifold 4, the test mechanism tube end 7 and the system pipeline 10 form a system. Select the corresponding test fixture to be installed on the manifold 4 according to the test to be performed. For example, when installing the pressure test fixture 3, align the lower flange 51 with the upper flange 52, and align and insert the handle 69 with the mounting hole 61 and the first limiting groove 62. After insertion, pull the handle 69 so that the handle 69 passes over the lower flange 51 and rotate the T-shaped rod 67 so that the limiting block 68 is aligned with the second limiting groove 64. Release the handle 69 so that the limiting block 68 enters the second limiting groove 64. Repeat this operation to complete the installation. If the tightness of the installation is too low, rotate the adjusting bolt 66 to reduce the distance between the adjusting bolt 66 and the intermediate tube 65, thereby increasing the tightness.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of double vacuum pipe test device for marine fuel tank, comprising a fuel tank body (1) and a vacuum pipe (2) located inside the fuel tank body (1), characterized in that: The vacuum pipe (2) is subjected to air tightness test by a test mechanism, the test mechanism comprises a pressure test tool (3) and a collector (4), the pressure test tool (3) and the collector (4) are connected by a connecting mechanism, and the connecting mechanism comprises: A connecting flange (5) comprises a lower flange (51) and an upper flange (52), the upper flange (52) is fixedly connected with the top end of the collector (4), a double-wall pipe helium leak detection joint is arranged on the lower flange (51), and the lower flange (51) is fixedly connected with the bottom end of the pressure test tool (3); A plurality of groups of fixing assemblies (6) are arranged along the circumferences of the lower flange (51) and the upper flange (52), the fixing assemblies (6) are used for fixing the lower flange (51) and the upper flange (52), and each fixing assembly (6) comprises an intermediate pipe (65), an adjusting bolt (66) and a T-shaped rod (67); the T-shaped rod (67) is pulled to press the T-shaped rod (67) on the lower flange (51), so that the fixing is completed; and the adjusting bolt (66) is rotated to adjust the tightness of the fixing.

2. A novel marine fuel tank double vacuum pipe testing device according to claim 1, characterized in that: The fixing assembly (6) further comprises a plurality of mounting holes (61) formed in the lower flange (51) and the upper flange (52), two first limiting grooves (62) are formed in the inner walls of the mounting holes (61), a circular groove (63) is formed in the top of the lower flange (51), two second limiting grooves (64) are formed in the inner walls of the circular groove (63), and the two second limiting grooves (64) are arranged in a staggered manner with the two first limiting grooves (62).

3. A novel marine fuel tank double vacuum pipe testing device according to claim 2, characterized in that: The intermediate pipe (65) is inserted into the mounting hole (61), the adjusting bolt (66) is threadedly connected with one end of the intermediate pipe (65), and the T-shaped rod (67) is movably connected with the other end of the intermediate pipe (65); a rotating ring (610) is rotatably connected to the bottom of the end of the adjusting bolt (66), and a limiting spring (611) is fixedly connected between the rotating ring (610) and the T-shaped rod (67).

4. A novel marine fuel tank double vacuum pipe testing device according to claim 3, characterized in that: Two limiting blocks (68) are fixedly connected to the surface of the T-shaped rod (67), so that the T-shaped rod (67) cannot rotate after the limiting blocks (68) enter the second limiting grooves (64), and a handle (69) is fixedly connected to the bottom of each limiting block (68).

5. A novel marine fuel tank double vacuum pipe testing device according to claim 1, characterized in that: The test mechanism further comprises a test mechanism pipe end (7) and a system pipeline (10); The test mechanism pipe end (7) is welded at one end to the vacuum pipe (2) and connected at the other end to the system pipeline (10) through a communication joint, and a plug plate (9) is welded to the connecting end of the vacuum pipe (2) and the test mechanism pipe end (7); a connecting joint (8) is in communication with the test mechanism pipe end (7); The system pipeline (10) is connected at one end to the vacuum pipe (2) and at the other end to the collector (4).

6. A novel marine fuel tank double vacuum pipe testing device according to claim 5, characterized in that: The collector (4) and the system pipeline (10) are in communication, and the top end of the collector (4) is connected to the pressure test tool, the air tightness test tool or the helium leak detection test tool through the connecting flange (5).

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