Height detection device and method for spring shim of sub-layer insulation box of LNG (Liquefied Natural Gas) ship

Abstract

The invention discloses a device for detecting the height of a spring washer of a sub-layer insulation box of an LNG (Liquefied Natural Gas) ship, which comprises a supporting module and a measuring module, and is characterized in that the measuring module is arranged at the upper part of the supporting module and comprises a first measuring plate and a second measuring plate, and the second measuring plate is arranged at the lower end of the first measuring plate; the first measuring plate and the second measuring plate are distributed in a step shape, one side of the upper portion of the supporting module is connected with the first measuring plate and the second measuring plate, and the second measuring plate is arranged on the lower portion of the first measuring plate. According to the invention, through the arrangement of the supporting module and the measuring module, multi-point measurement is carried out on the spring washer of the secondary insulation box, and the measuring efficiency and precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a device and method for detecting the height of spring gaskets in the secondary insulation box of an LNG ship. Background Technology

[0002] The cargo hold containment system of an LNG carrier consists of a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer. The secondary insulation layers contain insulation boxes distributed across various inner bulkhead areas. These boxes are secured to bases welded to the inner bulkhead using fasteners. The securing force is controlled by the deformation of spring washers in the connectors.

[0003] There are two requirements for the fastening pressure between the secondary insulation box and the inner bulkhead: firstly, the fastening pressure needs to reach 300 kg; secondly, considering the presence or absence of ballast water on the reverse side of the inner bulkhead, a certain amount of deformation space is allowed. This limits the required fastening force for the spring washers on the inner bulkhead, and the corresponding range of spring washer heights is also determined. To facilitate inspection and ensure accuracy, considering that the upper surfaces of the mounting plate and nut are flat, the height of the spring washers is uniformly added to the uniform height of the exposed nut for inspection.

[0004] The current method for checking whether the tightening force of the secondary insulation box meets the requirements after installation is to directly measure the spring washers of the secondary insulation box with a measuring ruler. This method has poor measurement accuracy and low efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for detecting the height of spring gaskets in the secondary insulation box of LNG ships. By setting up a support module and a measurement module, this invention can measure the spring gaskets in the secondary insulation box at multiple points, thereby improving the measurement efficiency and accuracy.

[0006] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows: A device for detecting the height of spring gaskets in the secondary insulation box of an LNG ship is disclosed. The device includes a support module and a measuring module. The measuring module is located on the upper part of the support module. The measuring module includes a first measuring plate and a second measuring plate. The second measuring plate is located at the lower end of the first measuring plate. The first measuring plate and the second measuring plate are arranged in a stepped manner. The upper side of the support module is connected to the first measuring plate and the second measuring plate respectively. The second measuring plate is located at the lower part of the first measuring plate.

[0007] Furthermore, the support module and the measurement module are integrally formed, and the first measurement plate and the support module are L-shaped as a whole.

[0008] Furthermore, the upper end of the second measuring plate is connected to the lower end of the first measuring plate, the right side of the second measuring plate is connected to the support module, and the left side of the second measuring plate forms a slot with the lower end of the first measuring plate.

[0009] A method for detecting the height of spring washers in secondary insulation boxes of LNG carriers, the method specifically includes the following steps: S1. After the spring washers of the secondary insulation box are installed, the height of the spring washers of the secondary insulation box is measured. S2, place the bottom of the support module on the pressure plate, and move the support module to bring the measuring module closer to the spring pad of the secondary insulation box; complete the measurement of the height of the spring pad of the secondary insulation box.

[0010] Furthermore, the installation process of the secondary insulation box spring washer is as follows: first, install the secondary insulation box spring washer on the connecting rod of the pressure plate, and then tighten the nut on the connecting rod to secure the secondary insulation box spring washer, thus completing the installation of the secondary insulation box spring washer.

[0011] Furthermore, when detecting the height of the secondary insulation box spring washer, the supporting module is rotated around the connecting rod as the axis to perform multi-point measurements on the secondary insulation box spring washer. When the measuring module approaches the nut above the secondary insulation box spring washer, the height between the upper end face of the nut and the pressure plate is greater than the height between the second measuring plate and the pressure plate but less than the height between the first measuring plate and the pressure plate, and the height of the secondary insulation box spring washer meets the requirements.

[0012] Based on the above technical solution, the invention patent's device and method for detecting the height of spring washers in secondary insulation boxes of LNG ships has achieved the following technical advantages through practical application: 1. The present invention provides a method for detecting the height of spring gaskets in the secondary insulation box of an LNG ship. By setting up a support module and a measurement module, the method performs multi-point measurements on the spring gaskets in the secondary insulation box, thereby improving measurement efficiency and accuracy. Attached Figure Description

[0013] Figure 1 This is a structural diagram of a detection device used in a spring gasket height detection device for a secondary insulation box of an LNG ship, according to the present invention.

[0014] Figure 2 This is a sliding state diagram of the detection device in the method for detecting the height of spring gaskets in the secondary insulation box of an LNG ship according to the present invention.

[0015] Figure 3 This is a diagram showing the usage status of the detection device in the method for detecting the height of spring gaskets in the secondary insulation box of an LNG ship according to the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided with reference to the accompanying drawings. The invention is described using specific examples shown. However, it should be understood that these descriptions are merely exemplary. This description is intended not to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the invention.

[0017] Example 1, such as Figure 1 As shown, a device for detecting the height of spring gaskets in the secondary insulation box of an LNG ship is disclosed. The device includes a support module 1 and a measuring module. The measuring module is mounted on the upper part of the support module 1. The measuring module includes a first measuring plate 2 and a second measuring plate 3. The second measuring plate 3 is mounted on the lower end of the first measuring plate 2. The first measuring plate 2 and the second measuring plate 3 are arranged in a stepped manner. The upper side of the support module 1 is connected to the first measuring plate 2 and the second measuring plate 3 respectively. The second measuring plate 3 is mounted on the lower part of the first measuring plate 2.

[0018] The support module 1 ensures that the detection device always maintains a vertical connection with the pressure plate 7 during use, avoiding the problem of inaccurate conventional measurement. The height range determined by the measurement module does not require specific height measurements. At the same time, multi-point measurement ensures measurement accuracy and improves the pertinence of subsequent height adjustments.

[0019] The support module 1 and the measuring module are integrally formed. The first measuring plate 2 and the support module 1 are L-shaped. The distance between the lower end face of the first measuring plate 2 and the bottom of the support module 1 is [missing information]. The upper end of the second measuring plate 3 is connected to the lower end of the first measuring plate 2. The right side of the second measuring plate 3 is connected to the support module 1. The left side of the second measuring plate 3 forms a groove with the lower end of the first measuring plate 2. The distance between the lower end face of the second measuring plate 3 and the bottom of the support module 1 is... Example 2, as Figure 2 and Figure 3 As shown, a method for detecting the height of spring washers in the secondary insulation box of an LNG ship includes the following steps: S1. After the spring pad 6 of the secondary insulation box is installed, the height of the spring pad 6 of the secondary insulation box is measured. S2, place the bottom of the support module 1 on the pressure plate 7, and move the support module 1 to bring the measuring module closer to the spring pad 6 of the secondary insulation box; complete the measurement of the height of the spring pad 6 of the secondary insulation box.

[0020] The installation process of the secondary insulation box spring washer 6 is as follows: first, install the secondary insulation box spring washer 6 on the connecting rod 4 of the pressure plate 7, and then tighten the nut 5 on the connecting rod 4 to secure the secondary insulation box spring washer 6, thus completing the installation of the secondary insulation box spring washer 6.

[0021] When detecting the height of the secondary insulation box spring washer 6, the support module 1 is rotated with the connecting rod 4 as the axis to perform multi-point measurements on the secondary insulation box spring washer 6. When the measuring module approaches the nut 5 above the secondary insulation box spring washer 6, the height between the upper end face of the nut 5 and the pressure plate 7 is greater than the height between the second measuring plate 3 and the pressure plate 7 and less than the height between the first measuring plate 2 and the pressure plate 7. The height of the secondary insulation box spring washer 6 meets the requirements.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, the scope of the invention is not limited to this. Those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solution claimed in the present invention.

Claims

1. A device for detecting the height of spring washers in secondary insulation boxes of LNG carriers, characterized in that, The device includes a support module and a measurement module. The measurement module is located on the upper part of the support module. The measurement module includes a first measurement plate and a second measurement plate. The second measurement plate is located at the lower end of the first measurement plate. The first and second measurement plates are arranged in a stepped manner. The upper side of the support module is connected to the first and second measurement plates respectively. The second measurement plate is located at the lower part of the first measurement plate.

2. The device for detecting the height of spring washers in the secondary insulation box of an LNG ship according to claim 1, characterized in that, The support module and the measurement module are integrally formed, and the first measurement plate and the support module are L-shaped as a whole.

3. The device for detecting the height of spring washers in the secondary insulation box of an LNG ship according to claim 2, characterized in that, The upper end of the second measuring plate is connected to the lower end of the first measuring plate, the right side of the second measuring plate is connected to the support module, and the left side of the second measuring plate forms a slot with the lower end of the first measuring plate.

4. A method for detecting the height of spring washers in secondary insulation boxes of LNG carriers, characterized in that, The method specifically includes the following steps: S1. After the spring washers of the secondary insulation box are installed, the height of the spring washers of the secondary insulation box is measured. S2, place the bottom of the support module on the pressure plate, and move the support module to bring the measuring module closer to the spring pad of the secondary insulation box; complete the measurement of the height of the spring pad of the secondary insulation box.

5. A method for detecting the height of spring washers in a secondary insulation box of an LNG ship according to claim 4, characterized in that, The installation process of the secondary insulation box spring washer is as follows: first, install the secondary insulation box spring washer on the connecting rod of the pressure plate, and then tighten the nut on the connecting rod to secure the secondary insulation box spring washer, thus completing the installation of the secondary insulation box spring washer.

6. A method for detecting the height of spring washers in a secondary insulation box of an LNG ship according to claim 4, characterized in that, When detecting the height of the spring washer of the secondary insulation box, the supporting module is rotated with the connecting rod as the axis to perform multi-point measurements on the spring washer of the secondary insulation box. When the measuring module is close to the nut above the spring washer of the secondary insulation box, the height between the upper end face of the nut and the pressure plate is greater than the height between the second measuring plate and the pressure plate and less than the height between the first measuring plate and the pressure plate. The height of the spring washer of the secondary insulation box meets the requirements.

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