System and method for testing bearing and temperature resistance characteristics of heat insulation cushion block of ship liquid cargo tank

Abstract

The invention discloses a system and a method for testing bearing and temperature resistance characteristics of a ship liquid cargo tank heat insulation cushion block, the testing system comprises a workbench, a heating device, a loading device, a temperature measuring device and a distance measuring device, the workbench is used for bearing the heat insulation cushion block; the heating device is connected with the lower surface of the heat-insulating cushion block for heating the heat-insulating cushion block; the loading device is connected with the upper surface of the heat insulation cushion block to apply pressure to the heat insulation cushion block; the measuring ends of the temperature measuring devices are located on the upper surface and the lower surface of the heat insulation cushion block. The distance measuring device faces the upper surface of the heat insulation cushion block and is used for measuring deformation. Compared with the prior art, the ship liquid cargo tank heat insulation cushion block bearing and temperature resistance characteristic testing system supports multiple testing modes such as static bearing, dynamic impact, long-term constant temperature and temperature gradient, force-displacement-temperature data are synchronously collected, and the testing scheme design is diversified; static and dynamic working conditions of the ship can be covered, and the effect of the ship liquid cargo tank on the heat insulation cushion block under actual working conditions can be well simulated.

Description

Technical Field

[0001] This invention relates to the field of performance testing technology for ship system components, specifically to a system and method for testing the load-bearing and temperature resistance characteristics of thermal insulation pads in ship liquid cargo tanks. Background Technology

[0002] Thermal insulation pads are required in high-temperature liquid cargo tanks on ships to provide thermal insulation and structural support for the hull. Their load-bearing capacity directly affects the stability of the cargo tanks, and their temperature resistance determines the maintenance life and service life of the hull connected to the high-temperature liquid cargo tanks. With the increasing demand for high-temperature liquid cargo transportation and the growing need for safety in maritime transport, while simultaneously reducing ship maintenance costs, the design of thermal insulation pads under independent liquid cargo tanks on ships is an important research direction.

[0003] Currently, when designing and manufacturing thermal insulation pad samples for performance testing, most testing devices can only test load-bearing capacity or temperature resistance individually, and cannot simulate the coupled working conditions of "high temperature environment + dynamic load" in actual ship operation. The test data deviates from the actual application. At the same time, they can only obtain pressure and temperature data, lacking a displacement monitoring module, and cannot fully reflect the deformation characteristics of the sample under load and temperature. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a test system and method for the load-bearing and temperature resistance characteristics of thermal insulation pads in ship liquid cargo tanks, thereby solving the technical problem that the existing technology cannot fully simulate the coupled working conditions of "high temperature environment + dynamic load" of thermal insulation pads.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a testing system for the load-bearing and temperature resistance characteristics of thermal insulation pads in ship cargo tanks, comprising: a workbench, a heating device, a loading device, a temperature measuring device, and a distance measuring device. The workbench is used to support the heat insulation pad; the heating device is connected to the lower surface of the heat insulation pad to heat the heat insulation pad; the loading device is connected to the upper surface of the heat insulation pad to apply pressure to the heat insulation pad; the measuring end of the temperature measuring device is located on the upper and lower surfaces of the heat insulation pad; the distance measuring device is arranged facing the upper surface of the heat insulation pad to measure its deformation.

[0006] In some embodiments, the workbench has a through hole, the heating device is disposed on the lower surface of the workbench and its heating end extends into the through hole, and a heat insulation pad is placed in the through hole, with its lower surface abutting against the heating end.

[0007] In some embodiments, a positioning box is further included, which is embedded in the through hole and abuts against the heating end of the heating device, and a heat insulation pad is embedded in the fixing box, which is used to fix the heat insulation pad.

[0008] In some embodiments, the heating device includes a heat source, a heat-conducting outer shell, and a heat-insulating outer shell. The heat-conducting outer shell encloses the heat source and has a heating end extending into the through-hole. The heat-insulating outer shell encloses the rest of the heat-conducting outer shell except for the heating end.

[0009] In some embodiments, the loading device has a pressure rod that is vertically arranged and whose lower end abuts against the upper surface of the heat insulation pad.

[0010] In some embodiments, a heat insulation felt is also included, which is disposed on the upper surface of the heat insulation pad, and the pressure rod abuts against the heat insulation pad via the heat insulation felt.

[0011] In some embodiments, the pressure rod is further provided with a pressure sensor to detect the pressure magnitude.

[0012] In some embodiments, a plurality of the ranging devices are disposed on the loading device and arranged around the pressure rod to measure the deformation of the heat insulation pad in different directions.

[0013] In some embodiments, a controller is also included, which is connected to the heating device, the loading device, the temperature measuring device, and the distance measuring device, respectively.

[0014] Secondly, the present invention also provides a method for testing the load-bearing and temperature resistance characteristics of a ship's liquid cargo tank insulation pad, which employs a ship's liquid cargo tank insulation pad load-bearing and temperature resistance characteristic testing system, comprising the following steps: S1, placing the insulation pad and installing a temperature measuring device on the insulation pad; S2, activating the heating device to heat the lower surface of the insulation pad to a preset temperature; S3, activating the loading device to apply pressure to the insulation pad; S4, collecting and analyzing the temperature data of the upper and lower surfaces of the insulation pad.

[0015] Compared with existing technologies, the ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system provided by this invention supports multiple testing modes such as static load-bearing, dynamic impact, long-term constant temperature, and temperature gradient, and simultaneously collects "force-displacement-temperature" data. The test scheme design is diverse; it can cover the static and dynamic working conditions of ships, and better simulate the effect of ship cargo tanks on insulation pads under actual working conditions, providing more realistic data support for the performance prediction of products in actual service environments. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of the ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system provided in this embodiment of the invention; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a flowchart of the test method for the load-bearing and temperature resistance characteristics of the thermal insulation pad block in the liquid cargo tank of a ship, provided in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] To address the current technical problem of not being able to fully simulate the coupled working conditions of "high temperature environment + dynamic load" of thermal insulation pads, this invention provides a testing system for the load-bearing and temperature resistance characteristics of thermal insulation pads in ship cargo tanks. This system can cover both static and dynamic working conditions of ships and better simulate the effect of ship cargo tanks on thermal insulation pads under actual working conditions.

[0019] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system provided in this embodiment of the invention; Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0020] The test system for the load-bearing and temperature resistance characteristics of the thermal insulation pads in ship cargo tanks includes a workbench 1, a heating device 2, a loading device 3, a temperature measuring device 4, and a distance measuring device 5.

[0021] The workbench 1 is used to support the heat insulation pad 9 to be tested. The heating device 2 is connected to the lower surface of the heat insulation pad 9 to heat it. The loading device 2 is connected to the upper surface of the heat insulation pad 9 to apply pressure to it, simulating a load. The measuring ends of the temperature measuring device 4 are located on the upper and lower surfaces of the heat insulation pad 9, respectively measuring the temperature of the upper and lower surfaces to test the heat insulation performance of the heat insulation pad 9. The distance measuring device 5 is arranged facing the upper surface of the heat insulation pad 9 to measure its deformation.

[0022] In some embodiments, the workbench 1 has a through hole, and a heating device 2 is disposed on the lower surface of the workbench 1 with its heating end extending into the through hole. A heat insulation pad 9 is placed in the through hole, with its lower surface abutting against the heating end, and the heating device 2 contacts and heats the heat insulation pad 9. Preferably, the bottom of the workbench 2 is provided with leveling feet to ensure that the upper surface of the workbench 2 is level.

[0023] In some embodiments, the testing system further includes a positioning box 6, which is embedded in the through hole and abuts against the heating end of the heating device 2. The bottom of the positioning box 6 is made of a metal material with good thermal conductivity, such as a steel plate. A heat insulation pad 9 is embedded in the fixing box 6, which is used to fix the heat insulation pad 9. Various fixing boxes 6 are manufactured; the external dimensions of the different fixing boxes 6 are the same, matching the through hole, while the internal dimensions differ to accommodate heat insulation pads 9 of different sizes.

[0024] In some embodiments, the heating device 2 includes a heat source, a heat-conducting outer shell, and a heat-insulating outer shell. The heat source can be a temperature-controlled heating wire to enable the heating device 2 to maintain a constant temperature. The heat-conducting outer shell encloses the heat source and has a heating end extending into a through-hole. The heat-conducting outer shell can also be made of a metal with good thermal conductivity, such as stainless steel. The heat-insulating outer shell encloses the rest of the heat-conducting outer shell except for the heating end to reduce heat loss and thermal contamination. The heat-insulating outer shell can be made of thermal insulation materials such as rock wool or refractory bricks.

[0025] In this embodiment, the heating device 2 needs to have the ability to regulate temperature within the range of room temperature to 300°C.

[0026] In some embodiments, the loading device 3 is disposed on the worktable 2 and located directly above the through hole. The loading device 3 has a pressure rod 31, which is vertically arranged and its lower end abuts against the upper surface of the heat insulation pad 9, for applying a certain pressure to the heat insulation pad 9, the pressure range being 0 to 50 kN. Static loading and dynamic cyclic loading are also supported.

[0027] Based on the above embodiments, a pressure sensor 7 is also provided on the pressure rod 31 to detect the pressure magnitude.

[0028] In some embodiments, the testing system further includes a heat-insulating felt 8 disposed on the upper surface of the heat-insulating pad 9, and the pressure rod 31 abuts against the heat-insulating pad 9 via the heat-insulating felt 8. The heat-insulating felt 8 is used to protect the loading device 3 or the pressure sensor 7 from being burned.

[0029] In some embodiments, at least three temperature measuring devices 4 are provided on both the upper and lower surfaces of the heat insulation pad 9, which are used to measure the temperature of different areas of the surface to obtain more accurate temperature data.

[0030] In some embodiments, multiple ranging devices 5 are disposed on the loading device 3 and arranged around the pressure rod 31 to measure the deformation of the heat insulation pad 9 in different directions. At least two ranging devices 5 are provided to measure the deformation of both sides of the heat insulation pad 9 respectively. Obviously, the more ranging devices 5 are provided, the more accurate the measurement results will be. The ranging devices 5 can be laser displacement sensors, which measure the distance between the surface of the heat insulation pad 9 and the ranging device 5 by laser to obtain the deformation of the heat insulation pad 9.

[0031] In some embodiments, the testing system further includes a controller 10, which is connected to the heating device 2, the loading device 3, the temperature measuring device 4, and the distance measuring device 5, respectively, and is used to control their respective operating states. The controller 10 can also be connected to a computer 11, which uses built-in software to analyze and process the obtained data to derive test conclusions.

[0032] Please see Figure 3 , Figure 3 This is a flowchart of the test method for the load-bearing and temperature resistance characteristics of the thermal insulation pad block in the liquid cargo tank of a ship, provided in an embodiment of the present invention.

[0033] The method for testing the load-bearing and temperature resistance characteristics of the ship's liquid cargo tank insulation pad uses the aforementioned ship liquid cargo tank insulation pad 9 load-bearing and temperature resistance characteristic testing system, and includes the following steps: S1. Place the heat insulation pad 9 and install the temperature measuring device 4, heat insulation felt 8, loading device 3, etc. on the heat insulation pad 9.

[0034] S2. Start the heating device 2 to heat the lower surface of the heat insulation pad 9 to the preset temperature. The temperature measuring device 4 collects the temperature data and transmits it to the controller 10.

[0035] S3. The loading device 3 is activated to apply pressure to the heat insulation pad 9. The pressure sensor 7 collects the pressure data and transmits it to the computer 11.

[0036] S4. Collect and analyze the temperature data of the upper and lower surfaces of the thermal insulation pad 9. Specifically, when the thermal insulation pad 9 is subjected to the design-required pressure and heating temperature, the controller 10 and the computer 11 collect the temperature and pressure data of the thermo-coupling condition in real time, and perform data analysis through the computer 11.

[0037] The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system provided by this invention supports multiple test modes such as static load-bearing, dynamic impact, long-term constant temperature, and temperature gradient, and simultaneously collects "force-displacement-temperature" data. The test scheme design is diverse; it can cover the static and dynamic working conditions of ships, and better simulate the effect of ship cargo tanks on insulation pads under actual working conditions, providing more realistic data support for the performance prediction of products in actual service environments.

[0038] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A testing system for the load-bearing and temperature resistance characteristics of thermal insulation pads in ship cargo tanks, characterized in that, include: The workbench is used to support the heat insulation pads; A heating device, which is connected to the lower surface of the heat insulation pad to heat the heat insulation pad; A loading device, which is connected to the upper surface of the insulation pad to apply pressure to the insulation pad; The temperature measuring device has its measuring ends located on the upper and lower surfaces of the heat insulation pad; A ranging device, which is arranged facing the upper surface of the heat insulation pad, is used to measure its deformation.

2. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 1, characterized in that, The workbench has a through hole, the heating device is disposed on the lower surface of the workbench and its heating end extends into the through hole, and the heat insulation pad is placed in the through hole, with its lower surface abutting against the heating end.

3. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 2, characterized in that, It also includes a positioning box, which is embedded in the through hole and abuts against the heating end of the heating device, and a heat insulation pad is embedded in the fixing box, which is used to fix the heat insulation pad.

4. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 2, characterized in that, The heating device includes a heat source, a heat-conducting outer shell, and a heat-insulating outer shell. The heat-conducting outer shell encloses the heat source and has a heating end that extends into the through hole. The heat-insulating outer shell encloses the other parts of the heat-conducting outer shell except for the heating end.

5. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 1, characterized in that, The loading device has a pressure rod, which is vertically arranged and its lower end abuts against the upper surface of the heat insulation pad.

6. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 5, characterized in that, It also includes a heat insulation felt, which is disposed on the upper surface of the heat insulation pad, and the pressure rod abuts against the heat insulation pad via the heat insulation felt.

7. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 5, characterized in that, The pressure rod is also equipped with a pressure sensor to detect the pressure magnitude.

8. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 5, characterized in that, Multiple ranging devices are mounted on the loading device and arranged around the pressure rod to measure the deformation of the heat insulation pad in different directions.

9. The ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system according to claim 1, characterized in that, It also includes a controller, which is connected to the heating device, the loading device, the temperature measuring device, and the distance measuring device, respectively.

10. A method for testing the load-bearing and temperature resistance characteristics of a thermal insulation pad in a ship's liquid cargo tank, characterized in that... The system employs the ship cargo tank insulation pad load-bearing and temperature resistance characteristic testing system as described in any one of claims 1-9, and includes the following steps: S1. Place the heat insulation pad and install the temperature measuring device on the heat insulation pad; S2. Start the heating device to heat the lower surface of the heat insulation pad to the preset temperature; S3. Start the loading device to apply pressure to the heat insulation pad; S4. Collect and analyze the temperature data of the upper and lower surfaces of the heat insulation pad.

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