A dynamic testing device for performance of cold insulation material

Abstract

The utility model discloses a cold -insulation material performance dynamic testing arrangement belongs to cold -insulation material performance test field. The utility model discloses a device includes cold source power end, cold -insulation material test end and cold source recovery end. The cold -insulation material test end is from inside to outside in proper order for simulation channel, cold -insulation layer, moistureproof layer and protection layer, and the inside wall and the outside wall of cold -insulation layer are provided with temperature recorder, are used for monitoring the inside wall and the outside wall temperature of cold -insulation layer. The cold source flows to the cold source recovery end by the cold -insulation material test end from the cold source power end. Cold source power end and cold source recovery end all are connected with center control equipment, and the whole test process is controlled through center control equipment. The center control equipment remote control start -stop and data acquisition when testing, and the inside and outside temperature change of cold -insulation layer is detected in real time, and the test site does not need to arrange the test personnel to keep watch, and the test result accuracy and test process safety are improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of performance testing of cold insulation materials, and specifically relates to a dynamic testing device for the performance of cold insulation materials. Background Technology

[0002] In industries such as air separation, petrochemicals, and cryogenics, insulation materials are an indispensable and crucial component for various equipment. For equipment that needs to operate under ultra-low or ultra-high temperature conditions, suitable insulation materials can significantly reduce the energy consumption required to maintain the corresponding operating temperature.

[0003] High-performance insulation materials can achieve the desired insulation effect with a smaller amount, allowing for more precise and compact equipment and reducing manufacturing costs. However, high-performance insulation materials are also expensive, leading to higher final costs for the equipment. Conversely, cheaper insulation materials require a larger amount to achieve the desired insulation effect, increasing the overall size of the equipment and manufacturing costs.

[0004] In simple terms, the final cost of the equipment equals the cost of the insulation material plus the manufacturing cost. However, these two costs are not calculated separately, and the choice of insulation material also affects the manufacturing cost. Therefore, it is crucial to test the insulation performance of various suitable insulation materials before the equipment is manufactured, in order to select the most cost-effective insulation material. Utility Model Content

[0005] The purpose of this invention is to safely and effectively test the cold insulation performance of cold insulation materials and to provide a dynamic testing device for the performance of cold insulation materials.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] This utility model provides a dynamic testing device for the performance of cold insulation materials, including a cold source power end, a cold insulation material testing end, and a cold source recovery end. The inlet end of the cold insulation material testing end is connected to the outlet end of the cold source power end, and the outlet end of the cold insulation material testing end is connected to the inlet end of the cold source recovery end; the cold source power end and the cold source recovery end are connected.

[0008] The cold insulation material test terminal includes a cold insulation layer, a moisture-proof layer, a protective layer, a simulation channel, and a temperature recorder.

[0009] The inlet of the simulation channel is connected to the power end of the cold source, and the outlet is connected to the cold source recovery end. The cold insulation layer is wrapped around the perimeter of the simulation channel and is fixed to the simulation channel by the cold insulation layer binding straps. The temperature recorder is located on the inner and outer walls of the cold insulation layer. A moisture-proof layer is covered on the cold insulation layer, and a protective layer is wrapped around the perimeter of the moisture-proof layer. The protective layer is fixed to the outer perimeter of the moisture-proof layer by the protective layer binding straps.

[0010] Preferably, the cold insulation layer strapping is made of low-temperature resistant raw rubber tape.

[0011] Preferably, the moisture-proof layer is made of polyvinyl chloride (PVC) roll material.

[0012] Preferably, the protective layer is made of low-temperature resistant aluminum foil.

[0013] Preferably, the protective layer binding tape is made of low-temperature resistant raw rubber tape.

[0014] Preferably, the cold source power end uses a liquid nitrogen pump, and the cold source recovery end is equipped with a recovery storage tank; a central control device is provided between the cold source power end and the cold source recovery end; both the liquid nitrogen pump and the recovery storage tank are connected to the central control device, and a feedback control connection is established between the liquid nitrogen pump, the recovery storage tank and the central control device.

[0015] Preferably, the outlet end of the liquid nitrogen pump is equipped with a flow meter, a pressure gauge, and a thermometer, which are connected to the central control equipment.

[0016] Preferably, a compressor is provided between the cold source power end and the cold source recovery end, and the control port of the compressor is connected to the central control equipment.

[0017] Preferably, the temperature recorders are arranged in pairs, and the line connecting the positions of each pair of temperature recorders is perpendicular to the central axis of the simulation channel.

[0018] Preferably, the temperature recorder is arranged in multiple groups along the length of the analog channel.

[0019] Compared with the prior art, this utility model has the following advantages:

[0020] This invention provides a dynamic testing device for the performance of cold-insulating materials. The cold source power end uses a liquid nitrogen pump. By controlling various operating parameters of the liquid nitrogen pump, it simulates real-world fluid parameters. By simulating the fluid flow in actual equipment, cold-insulating materials of different thicknesses and materials are wrapped around the testing end of the cold-insulating material. Real-time monitoring of temperature changes inside and outside the cold-insulating layer provides feedback on the cold-insulating performance of the material, accurately assessing the differences in cold-insulating performance between different materials and thicknesses. Furthermore, the device uses a closed-loop circulation system to achieve cold source recovery and reuse, reducing testing costs. The entire process is remotely controlled by a central control device, eliminating the need for on-site personnel to operate the device, thus avoiding exposure to hazardous environments and ensuring the safety of the testing process. Attached Figure Description

[0021] Figure 1 This is a connection diagram of the dynamic testing device for the performance of cold insulation materials provided in this embodiment;

[0022] Figure 2 This is an overall schematic diagram of the cold insulation material test end provided in this embodiment;

[0023] Figure 3 This is a cross-sectional view of the test end of the cold insulation material provided in this embodiment;

[0024] Figure 4 This is a schematic diagram of the temperature recorder location layout provided in this embodiment;

[0025] In the diagram: 1. Cold insulation layer; 2. Cold insulation strapping; 3. Moisture-proof layer; 4. Protective layer; 5. Protective layer strapping; 6. Simulation channel; 7. Temperature recorder. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection or arrangement, a detachable connection or arrangement, or an integral connection or arrangement. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Terms such as "comprising" as used herein do not exclude the presence or addition of one or more other elements or combinations thereof, and therefore should not be construed as limiting this utility model.

[0028] like Figure 1 As shown in the preferred embodiment of this utility model, this embodiment provides a dynamic testing device for the performance of cold insulation materials, including a cold source power end, a cold insulation material testing end, and a cold source recovery end. The device provided by this utility model simulates the flow of fluid in actual equipment and detects the temperature changes inside and outside the cold insulation layer in real time at the cold insulation material testing end to provide feedback on the cold insulation performance of the cold insulation material. In the device provided in this embodiment, the inlet end of the cold insulation material testing end is connected to the outlet end of the cold source power end, and the outlet end of the cold insulation material testing end is connected to the inlet end of the cold source recovery end. In this embodiment, the cold source power end uses a liquid nitrogen pump to deliver liquid nitrogen into the cold insulation material testing end, providing a cold source for the testing process. Both the liquid nitrogen pump and the recovery tank of the cold source recovery end are connected to a central control device, and a feedback control connection is established between the nitrogen pump, the recovery tank, and the central control device. The cold source power end and the cold source recovery end are connected through a compressor, and the control port of the compressor is connected to the central control device. During the test, the parameters of the liquid nitrogen tank are viewed in real time through the central control device to ensure sufficient liquid nitrogen. Simultaneously, several flow meters, pressure gauges, and thermometers are installed at the outlet of the cold source power end. These flow meters, pressure gauges, and thermometers are all connected to the central control equipment to transmit flow signals, pressure, and temperature parameters. They also monitor the liquid nitrogen level and pressure parameters within the liquid nitrogen storage tank and control the operating parameters of the liquid nitrogen pump, ensuring that the fluid state of the cold source entering the insulation material test end more closely resembles that in the actual equipment, thus making the test results more realistic. After use, the cold source flowing through the insulation material test end is recovered to a recovery storage tank via a cold source recovery end. The cold source recovery end is also equipped with a pressure gauge to monitor the pressure inside the recovery storage tank, preventing accidents caused by excessive internal pressure. When the liquid nitrogen level at the cold source power end is detected to be insufficient, the central control equipment controls the compressor to re-cool the used liquid nitrogen before sending it back to the cold source power end to replenish the liquid nitrogen.

[0029] In the device provided in this embodiment, such as Figure 2 and Figure 3As shown, the cold insulation material test end includes a cold insulation layer 1, a moisture-proof layer 3, a protective layer 4, a simulation channel 6, and a temperature recorder 7. The simulation channel 6 is a centrally located pipe. Its inlet is connected to the cold source power end, and its outlet is connected to the cold source recovery end. Liquid nitrogen is pumped into the simulation channel 6 through the cold source power end, and then flows into the recovery tank at the cold source recovery end. The outer perimeter of the simulation channel 6 is wrapped with the cold insulation layer 1 and secured to the outside of the simulation channel 6 with cold insulation strapping 2. The cold insulation layer 1 is the cold insulation material to be tested. The controlled variable method can be used to test the performance of different cold insulation materials at the same thickness or to test the relationship between the performance of the same cold insulation material and the change in wrapping thickness. In actual testing, the thickness of the cold insulation layer 1 can be increased or decreased as needed. To make the test results closer to actual conditions and to replicate the working environment of the cold insulation material as much as possible, the material used in the simulation channel 6 is the same as that used in the equipment where the cold insulation material is actually applied.

[0030] like Figure 4 As shown, in this embodiment, temperature recorders 7 are installed on both the inner wall of the cold insulation layer 1 closest to the simulation channel 6 and the outer wall furthest from the simulation channel 6. Multiple temperature recorders 7 can be installed according to the actual length of the cold insulation layer 1. Even if the thickness of the cold insulation layer 1 is different, the temperature recorders 7 are all installed on the inner wall of the cold insulation layer 1 closest to the simulation channel 6 and the outer wall furthest from the simulation channel 6. Two temperature recorders 7 are grouped together, and the line connecting the positions of each group is perpendicular to the central axis of the simulation channel 6. Since the cold insulation layer 1 wraps around the outside of the simulation channel 6, the temperature recorders 7 are installed along the length of the simulation channel 6. The temperature recorders 7 automatically collect the temperature at each measuring point and provide real-time feedback on the temperature difference inside and outside the cold insulation layer 1. To improve the accuracy of the temperature detection results, multiple groups of temperature recorders 7 are installed along the length of the simulation channel 6.

[0031] like Figure 2 and Figure 3As shown, in the device provided in this embodiment, the cold insulation layer 1 is covered with a moisture-proof layer 3. In this embodiment, the moisture-proof layer 3 is made of polyvinyl chloride roll material, and its main functions are waterproofing and moisture-proofing to protect the cold insulation layer 1, ensure good cold insulation effect, and prevent the temperature recorder 7 from getting damp, which would lead to inaccurate temperature measurements. A protective layer 4 is also wrapped around the periphery of the moisture-proof layer 3. In this embodiment, the protective layer 4 is made of low-temperature resistant aluminum foil, used to protect the structural integrity of the internal moisture-proof layer 3 and the cold insulation layer 1, preventing damage to the internal structure from the environment and external forces. The protective layer 4 also has a certain waterproof function, further preventing the internal materials from getting damp and affecting the test results. The protective layer 4 is fixed to the outer periphery of the moisture-proof layer 3 by using protective layer strapping 5, improving the stability of the protective layer 4. In this embodiment, since the cold source used is a liquid nitrogen or other fluid with extremely low temperature, both the cold insulation layer strapping 2 and the protective layer strapping 5 are made of low-temperature resistant raw rubber tape. Compared with ordinary strapping tape, it can still maintain its elasticity in extremely cold environments and will not deform or fall off due to thermal expansion and contraction. It can adapt to cyclic testing from low temperature to room temperature and can meet the special needs of the application scenario of this device.

[0032] In practical use, the device provided in this embodiment arranges the temperature recorder on the cold insulation layer 1 according to the actual test requirements before testing, and connects and installs all components of the device. After installation, the test personnel control the start and stop of components such as the cold source power end and the cold source recovery end from the central control equipment. The entire test operation is completed in the central control equipment, which can be set in a central control room outside the test site. No personnel are required to be on duty at the test site, which effectively prevents burns from low-temperature contact and suffocation hazards from gas leaks, and improves the safety of the overall test process.

[0033] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A dynamic testing device for the performance of cold-insulating materials, characterized in that, It includes a cold source power end, a cold insulation material testing end, and a cold source recovery end. The inlet end of the cold insulation material testing end is connected to the outlet end of the cold source power end, and the outlet end of the cold insulation material testing end is connected to the inlet end of the cold source recovery end; the cold source power end and the cold source recovery end are connected. The cold insulation material test end includes a cold insulation layer (1), a moisture-proof layer (3), a protective layer (4), a simulation channel (6), and a temperature recorder (7). The inlet end of the simulation channel (6) is connected to the cold source power end, and the outlet end is connected to the cold source recovery end. The cold insulation layer (1) is wrapped around the periphery of the simulation channel (6), and the cold insulation layer (1) is fixed to the simulation channel (6) by the cold insulation layer binding strap (2). The temperature recorder (7) is located on the inner and outer side walls of the cold insulation layer (1). The cold insulation layer (1) is covered with a moisture-proof layer (3), and the periphery of the moisture-proof layer (3) is wrapped with a protective layer (4). The protective layer (4) is fixed to the outer periphery of the moisture-proof layer (3) by the protective layer binding strap (5).

2. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The cold insulation layer binding strap (2) is made of low-temperature resistant raw rubber tape.

3. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The moisture-proof layer (3) is made of polyvinyl chloride roll material.

4. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The protective layer (4) is made of low-temperature resistant aluminum foil.

5. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The protective layer binding tape (5) is made of low-temperature resistant raw rubber tape.

6. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The cold source power end uses a liquid nitrogen pump, and the cold source recovery end is equipped with a recovery storage tank; a central control device is provided between the cold source power end and the cold source recovery end; the liquid nitrogen pump and the recovery storage tank are both connected to the central control device, and a feedback control connection is established between the liquid nitrogen pump, the recovery storage tank and the central control device.

7. The dynamic testing device for the performance of cold-insulating materials according to claim 6, characterized in that, The outlet end of the liquid nitrogen pump is equipped with a flow meter, a pressure gauge, and a thermometer, which are connected to the central control equipment.

8. The dynamic testing device for the performance of cold-insulating materials according to claim 6, characterized in that, A compressor is provided between the cold source power end and the cold source recovery end, and the control port of the compressor is connected to the central control equipment.

9. The dynamic testing device for the performance of cold-insulating materials according to claim 1, characterized in that, The temperature recorders (7) are arranged in pairs, and the line connecting the positions of each pair of temperature recorders (7) is perpendicular to the central axis of the analog channel (6).

10. The dynamic testing device for the performance of cold-insulating materials according to claim 9, characterized in that, The temperature recorder (7) is set in multiple groups along the length of the analog channel (6).

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