Tooling for tensile test of LNG (liquefied natural gas) polyurethane foam sample

Abstract

The utility model discloses a tool for a tensile test of an LNG (Liquefied Natural Gas) polyurethane foam sample, which comprises an upper positioning module and a lower positioning module, and the upper positioning module and the lower positioning module are respectively provided with an upper end groove and a lower end groove which are matched with the two ends of the LNG polyurethane foam sample; the upper end groove and the lower end groove are each of a front-back opening structure, an upper connecting column used for being connected with the connecting end of a stretcher is arranged on the upper positioning module, and the lower positioning module is arranged on the base. An upper limiting plate and a lower limiting plate which are used for limiting the LNG polyurethane foam sample are respectively arranged on the back surfaces of the upper positioning module and the lower positioning module. According to the utility model, not only can the tensile test efficiency be improved and the tensile test effect be ensured, but also the damage of the tensile test to the LNG polyurethane foam sample can be avoided.

Description

Technical Field

[0001] The utility model belongs to the field of liquefied natural gas, relates to a tensile testing technology for LNG polyurethane foam samples, and specifically relates to a tool for tensile testing of LNG polyurethane foam samples. Background Art

[0002] Liquefied natural gas (LNG) storage tanks are specialized warehouses used to store and transport LNG, typically installed on LNG carriers. Due to the characteristics of LNG, the tanks used to store LNG on LNG carriers must meet extremely high standards of sealing, flame retardancy, and insulation. LNG polyurethane foam modules form the inner walls of storage tanks, and tensile performance is an important characteristic of LNG polyurethane foam modules. Otherwise, the module will not meet the requirements for use in LNG storage tanks, so tensile testing is required for the LNG polyurethane foam modules.

[0003] The shape of the LNG polyurethane foam module is similar to a dumbbell. The existing tensile testing method is to clamp the LNG polyurethane foam module from the middle with a fixture and then use a tensile machine to pull the LNG polyurethane foam module to perform the test. This method has many disadvantages, as follows:

[0004] 1. The fixture has limited control effect on the LNG polyurethane foam module. During the tensile test, the LNG polyurethane foam module is prone to displacement, thus affecting the effect of the tensile test.

[0005] 2. When the clamp is clamping the LNG polyurethane foam module, it is easy to cause damage to the LNG polyurethane foam module.

[0006] 3. For each LNG polyurethane foam module, a connector needs to be installed to connect to the stretching machine. After the test is completed, the connector needs to be removed, which is not only time-consuming and labor-intensive, resulting in low test efficiency, but also the operation process of installing and removing the connector is likely to damage the LNG polyurethane foam module. Summary of the Invention

[0007] Purpose of the invention: In order to overcome the deficiencies in the prior art, a tooling for tensile testing of LNG polyurethane foam samples is provided, which can not only improve the efficiency of tensile testing and ensure the effect of tensile testing, but also avoid damage to the LNG polyurethane foam samples caused by tensile testing.

[0008] Technical solution: To achieve the above-mentioned purpose, the utility model provides a tool for tensile testing of LNG polyurethane foam samples, including an upper positioning module and a lower positioning module, the upper positioning module and the lower positioning module are respectively provided with an upper end groove and a lower end groove that match the two ends of the LNG polyurethane foam sample, and the upper end groove and the lower end groove are both front and rear opening structures, the upper positioning module is provided with an upper connecting column for connecting the connecting end of the stretching machine, the lower positioning module is arranged on the base, and the backs of the upper positioning module and the lower positioning module are respectively provided with an upper limit plate and a lower limit plate for limiting the LNG polyurethane foam sample.

[0009] Furthermore, the notches of the upper end groove and the lower end groove match the neck of the LNG polyurethane foam sample.

[0010] Furthermore, the upper connecting column and the connecting end of the stretching machine are connected by threads.

[0011] Furthermore, an upper docking interface is provided on the top surface of the upper positioning module, and the connecting column is fitted on the upper docking interface.

[0012] Furthermore, a lower connecting column is provided on the base, and a lower docking interface matching the lower connecting column is provided on the bottom surface of the lower positioning module, and the lower docking interface is fitted on the lower connecting column.

[0013] Furthermore, the upper limit plate and the lower limit plate are welded and fixed on the back sides of the upper positioning module and the lower positioning module respectively.

[0014] Beneficial effects: Compared with the prior art, the present invention realizes the tensile test of LNG polyurethane foam samples by replacing the fixture with a specially designed tool and adding a connector, which has the following advantages:

[0015] 1. The upper positioning module and the lower positioning module can effectively fix and limit the LNG polyurethane foam sample, ensuring that there will be no displacement during the tensile test and ensuring the tensile test effect.

[0016] 2. The entire tensile test process is simple and effective, and no connector is required, which greatly saves test time and improves tensile test efficiency.

[0017] 3. During the entire tensile test process, no damage will be caused to the LNG polyurethane foam sample, ensuring the integrity of the LNG polyurethane foam sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model in a state to be tested;

[0019] Figure 2It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 3 It is a front schematic diagram of the utility model;

[0021] Figure 4 It is a schematic diagram of the reverse side of the utility model;

[0022] Figure 5 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0024] like Figures 1 to 5 As shown, the utility model provides a tool for tensile testing of LNG polyurethane foam samples, including an upper positioning module 1 and a lower positioning module 2. The upper positioning module 1 and the lower positioning module 2 are respectively provided with an upper end groove 11 and a lower end groove 21 that match the two ends of the LNG polyurethane foam sample 10. The upper end groove 11 and the lower end groove 21 are both front and rear open structures. The notches of the upper end groove 11 and the lower end groove 21 match the neck of the LNG polyurethane foam sample 10. An upper docking port 3 is provided on the top surface of the upper positioning module 1, and a connecting column 4 is fitted on the upper docking port 3. The connecting column 4 is threadedly connected to the connecting end of the tensile machine. A lower connecting column 6 is provided on the base 5. A lower docking port 7 that matches the lower connecting column 6 is provided on the bottom surface of the lower positioning module 2. The lower docking port 7 is fitted on the lower connecting column 6. The backs of the upper positioning module 1 and the lower positioning module 2 are respectively welded with an upper limit plate 8 and a lower limit plate 9 for limiting the LNG polyurethane foam sample 10.

[0025] In this embodiment, the above-mentioned tooling is used to assist in performing a tensile test on the LNG polyurethane foam sample 10. The specific operation process is as follows:

[0026] First, connect the connecting column 4 to the stretching machine, and then use the stretching machine to fine-tune the longitudinal relative distance between the upper positioning module 1 and the lower positioning module 2 according to the length specification of the LNG polyurethane foam sample 10. Then, fit the LNG polyurethane foam sample 10 into the upper end groove 11 and the lower end groove 21 until it touches the upper limit plate 8 and the lower limit plate 9. Finally, start the stretching machine for a stretching test. After the test is completed, take out the LNG polyurethane foam sample 10.

[0027] Through the above test operation process, it can be seen that it has the following advantages:

[0028] 1. The upper positioning module 1 and the lower positioning module 2 can effectively fix and limit the LNG polyurethane foam sample 10, ensuring that there will be no displacement during the tensile test, thereby ensuring the tensile test effect.

[0029] 2. The entire tensile test process is simple and effective, and no connector is required, which greatly saves test time and improves tensile test efficiency.

[0030] 3. During the entire tensile test process, no damage is caused to the LNG polyurethane foam sample 10, thereby ensuring the integrity of the LNG polyurethane foam sample 10.

Claims

1. A tool for tensile testing of LNG polyurethane foam samples, characterized in that: It includes an upper positioning module and a lower positioning module, and the upper positioning module and the lower positioning module are respectively provided with an upper end groove and a lower end groove that match the two ends of the LNG polyurethane foam sample, and the upper end groove and the lower end groove are both front and rear opening structures. The upper positioning module is provided with an upper connecting column for connecting the stretching machine connecting end, and the lower positioning module is arranged on the base. The backs of the upper positioning module and the lower positioning module are respectively provided with an upper limit plate and a lower limit plate for limiting the LNG polyurethane foam sample.

2. The tooling for tensile testing of LNG polyurethane foam samples according to claim 1, characterized in that: The notches of the upper end groove and the lower end groove match the neck of the LNG polyurethane foam sample.

3. The tooling for tensile testing of LNG polyurethane foam samples according to claim 1, characterized in that: The upper connecting column is connected to the connecting end of the stretching machine by using threads.

4. The tooling for tensile testing of LNG polyurethane foam samples according to claim 1, characterized in that: An upper docking interface is provided on the top surface of the upper positioning module, and the upper connecting column is matched with the upper docking interface.

5. The tool for tensile testing of LNG polyurethane foam samples according to claim 1, characterized in that: A lower connecting column is provided on the base, and a lower docking interface matching the lower connecting column is provided on the bottom surface of the lower positioning module, and the lower docking interface is fitted on the lower connecting column.

6. The tool for tensile testing of LNG polyurethane foam samples according to claim 1, characterized in that: The upper limit plate and the lower limit plate are respectively welded and fixed on the back sides of the upper positioning module and the lower positioning module.

Images