Tool suitable for tightness test of marine fuel gas ventilation double-wall pipe

Abstract

The utility model relates to the field of ships, and particularly discloses a tool suitable for a marine gas ventilation double-wall pipe tightness test, which comprises a GVU container wall, a test tool is arranged above the GVU container wall, and the test tool comprises a double-wall pipe outer pipe and a double-wall pipe inner pipe. A closing plate is installed at the upper end of the double-wall pipe outer pipe and located on the outer side of the double-wall pipe inner pipe, bolt pairs are installed in the closing plate in an array mode, and an installation clamp is arranged on the test tool. The whole work formed by the outer pipe of the double-wall pipe, the closing plate and the inner pipe of the double-wall pipe can control the exhaust condition during test and use, during tightness test, the outer pipe of the ventilation double-wall pipe can be independently pressurized by using the tool to protect the interior of the GVU from being damaged, and during daily operation, the outer pipe of the ventilation double-wall pipe and the internal space of the GVU can be communicated by using the tool, so that the sealing performance of the GVU is improved. And normal ventilation in the GVU is ensured.

Description

Technical Field

[0001] The utility model relates to the field of ships, and specifically to a tooling for the tightness test of a marine gas ventilation double-wall pipe. Background Art

[0002] LNG (liquefied natural gas) is a green and pollution-free clean energy in the ship industry. To meet the emission requirements, the industry is gradually developing from traditional diesel single-fuel to LNG and diesel dual-fuel. For the connection of the marine gas ventilation double-wall pipe, from the LNG tank outlet fuel preparation room to the inlet of the gas valve unit (GVU) in front of the main engine, and from the outlet of the gas valve unit in front of the main engine to the main engine. The inner pipe of the marine gas ventilation double-wall pipe is continuous from the outlet fuel preparation room to the main engine, and the design pressures are the same. Therefore, there is no safety risk in the tightness test of the inner pipe; the outer pipe of the marine gas ventilation double-wall pipe is discontinuous from the outlet fuel preparation room to the main engine. In the internal section of the gas valve unit in front of the main engine, the gas ventilation double-wall pipe only has an inner pipe, and the outer pipe is directly connected to the internal space of the gas valve unit in front of the main engine. However, the design pressure of the gas valve unit in front of the main engine is much lower than that of the gas ventilation double-wall pipe. Therefore, there is a risk of damage in the tightness test of the outer pipe. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a tooling for the tightness test of a marine gas ventilation double-wall pipe, which solves the problems mentioned in the above background.

[0004] The utility model provides the following technical solution: a tooling for the tightness test of a marine gas ventilation double-wall pipe, including the GVU container wall. Above the GVU container wall, there is a test tooling, and the test tooling includes: an outer double-wall pipe and an inner double-wall pipe. At the upper end of the outer double-wall pipe, a blanking plate is installed outside the inner double-wall pipe. Inside the blanking plate, a bolt pair is installed in an array. An installation fixture is arranged on the test tooling.

[0005] As a further scheme of the utility model: the installation fixture includes: a positioning rod and a positioning pressure rod. At the lower end of the positioning rod, a bottom support plate is installed. On the outer side of the upper end of the positioning rod, adjustment threads are provided. Above the positioning pressure rod, an installation nut is installed outside the adjustment threads.

[0006] As a further scheme of the utility model: the outer double-wall pipe and the inner double-wall pipe are fixedly connected to the blanking plate by welding.

[0007] As a further scheme of the utility model: the bottom support plate is fixedly connected to the positioning rod, and at one end of the positioning pressure rod, a movable collar is installed on the outer side of the positioning rod.

[0008] As a further solution of the utility model: the positioning pressure rod is an L-shaped member, and the installation nut is rotationally connected in meshing with the adjustment thread.

[0009] As a further solution of the utility model: the outer tube of the double-wall tube is fixedly connected to the wall of the GVU container.

[0010] As a further solution of the utility model: the outer diameter dimension length of the inner tube of the double-wall tube is smaller than the inner diameter dimension length of the outer tube of the double-wall tube.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The entire operation composed of the outer tube of the double-wall tube, the blanking plate and the inner tube of the double-wall tube can control the exhaust situation during the test and use. During the airtightness test, the outer tube of the ventilation double-wall tube can be pressurized separately by using this tooling to protect the inside of the GVU from damage. During the daily operation, the inside of the GVU can be normally ventilated by using this tooling to connect the outer tube of the ventilation double-wall tube and the internal space of the GVU.

[0013] 2. Control the installation nut to squeeze the positioning pressure rod downward, and control the lower end position of the positioning pressure rod to press the upper position of the blanking plate. Therefore, the lower ends of the outer tube of the double-wall tube and the inner tube of the double-wall tube can be integrally supported on the same plane, ensuring the size of the welding forming device. Description of the drawings

[0014] Figure 1 It is a schematic structural diagram of a tooling applicable to the airtightness test of a marine gas ventilation double-wall tube;

[0015] Figure 2 It is a schematic structural diagram of the installation fixture in a tooling applicable to the airtightness test of a marine gas ventilation double-wall tube;

[0016] Figure 3 It is a side view of the whole device in a tooling applicable to the airtightness test of a marine gas ventilation double-wall tube;

[0017] Figure 4 It is a top view of the whole device in a tooling applicable to the airtightness test of a marine gas ventilation double-wall tube;

[0018] Figure 5 It is a cross-section of the whole device in a tooling applicable to the airtightness test of a marine gas ventilation double-wall tube.

[0019] In the figure: 1. GVU container wall; 2. Outer tube of the double-wall tube; 3. Blanking plate; 4. Bolt pair; 5. Inner tube of the double-wall tube; 6. Installation fixture; 601. Positioning rod; 602. Bottom support plate; 603. Adjustment thread; 604. Positioning pressure rod; 605. Installation nut. Detailed implementation mode

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figures 1-5 shown, this embodiment provides a tooling applicable to the airtightness test of a marine gas ventilation double-wall pipe, including the GVU container wall 1. It is characterized in that a test tooling is arranged above the GVU container wall 1. The test tooling includes: an outer double-wall pipe 2 and an inner double-wall pipe 5. The outer double-wall pipe 2 is fixedly connected to the GVU container wall 1. The outer diameter dimension length of the inner double-wall pipe 5 is smaller than the inner diameter dimension length of the outer double-wall pipe 2. A blanking plate 3 is installed outside the upper end of the outer double-wall pipe 2 and located on the outside of the inner double-wall pipe 5. The outer double-wall pipe 2 and the inner double-wall pipe 5 are fixedly connected to the blanking plate 3 by welding. Bolt pairs 4 are arrayed and installed inside the blanking plate 3. An installation fixture 6 is arranged on the test tooling.

[0022] As Figures 2-3 shown, in this embodiment, the installation fixture 6 includes: a positioning rod 601 and a positioning pressure rod 604. A movable collar is installed at one end of the positioning pressure rod 604 and located outside the positioning rod 601. The positioning pressure rod 604 is an L-shaped member. A bottom support plate 602 is installed at the lower end of the positioning rod 601. The bottom support plate 602 is fixedly connected to the positioning rod 601. Adjusting threads 603 are provided on the outer side of the upper end of the positioning rod 601. An installation nut 605 is installed above the positioning pressure rod 604 and located outside the adjusting threads 603. The installation nut 605 is meshed and rotationally connected with the adjusting threads 603.

[0023] The working principle of the present utility model is as follows: During installation, the outer tube 2 of the double-wall tube is integrally inserted into the interior of the GVU container wall 1, and the intersection position of the GVU container wall 1 and the outer tube 2 of the double-wall tube is fillet welded. After the blanking plate 3 is integrally placed at the upper end position of the outer tube 2 of the double-wall tube, the inner tube 5 of the double-wall tube is integrally inserted from the inside of the outer tube 2 of the double-wall tube, and then 6 is inserted from the inside of the outer tube 2 of the double-wall tube. The lower end position of the installation fixture 6 is integrally aligned with the lower end position of the outer tube 2 of the double-wall tube. The positioning pressure rod 604 is integrally sleeved above the positioning rod 601 through a collar, and the installation nut 605 is integrally sleeved above the positioning rod 601. After that, by applying torque to the installation nut 605 to engage with the adjustment thread 603, the installation nut 605 is controlled to squeeze the positioning pressure rod 604 downward, and the lower end position of the positioning pressure rod 604 is pressed against the upper position of the blanking plate 3. Therefore, the lower ends of the outer tube 2 of the double-wall tube and the inner tube 5 of the double-wall tube can be integrally supported on the same plane. Then, the outer tube 2 of the double-wall tube, the blanking plate 3, and the inner tube 5 of the double-wall tube are fillet welded to complete the installation. After that, the installation fixture 6 is removed. When testing the container, the bolt pair 4 is installed inside the blanking plate 3, and the flow path between the A exhaust area and the D exhaust area is cut off. At this time, when the D exhaust area is inflated and pressurized, the A exhaust area can maintain its original state and avoid being damaged by pressure. During daily operation, by removing the bolt pair 4 on the blanking plate 3, the A exhaust area and the D exhaust area are connected. At this time, when the D exhaust area is ventilated, the A exhaust area can be ventilated synchronously to ensure the ventilation effect.

[0024] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0025] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling applicable to the airtightness test of a marine gas ventilation double-wall pipe, including a GVU container wall (1), characterized in that, Above the GVU container wall (1), a test tooling is provided. The test tooling includes: an outer tube (2) of a double-wall tube and an inner tube (5) of the double-wall tube. At the upper end of the outer tube (2) of the double-wall tube, a blanking plate (3) is installed outside the inner tube (5) of the double-wall tube. Inside the blanking plate (3), bolt pairs (4) are installed in an array. An installation fixture (6) is provided on the test tooling.

2. The tooling for the airtightness test of a marine gas ventilation double-wall pipe according to claim 1, characterized in that, The installation fixture (6) includes: a positioning rod (601) and a positioning pressure rod (604). At the lower end of the positioning rod (601), a bottom support plate (602) is installed. On the outer side of the upper end of the positioning rod (601), an adjustment thread (603) is provided. Above the positioning pressure rod (604), an installation nut (605) is installed outside the adjustment thread (603).

3. The tooling for the airtightness test of a marine gas ventilation double-wall pipe according to claim 1, characterized in that, The outer tube (2) of the double-wall tube and the inner tube (5) of the double-wall tube are fixedly connected to the blanking plate (3) by welding.

4. The tooling for the tightness test of a marine gas ventilation double-wall pipe according to claim 2, characterized in that, The bottom support plate (602) is fixedly connected to the positioning rod (601). At one end of the positioning pressure rod (604), a movable collar is installed outside the positioning rod (601).

5. The tooling for the airtightness test of a marine gas ventilation double-wall pipe according to claim 2, characterized in that, The positioning pressure rod (604) is an L-shaped member. The installation nut (605) is rotationally connected in mesh with the adjustment thread (603).

6. The tooling for the airtightness test of a marine gas ventilation double-wall pipe according to claim 1, characterized in that The outer tube (2) of the double-wall tube is fixedly connected to the GVU container wall (1).

7. A tooling applicable to the tightness test of a marine gas ventilation double-wall pipe according to claim 1, characterized in that, The outer diameter dimension length of the inner tube (5) of the double-wall tube is smaller than the inner diameter dimension length of the outer tube (2) of the double-wall tube.

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