A deep-sea low-temperature environment simulation device and simulation method

Abstract

The application provides a deep-sea low-temperature environment simulation device and a simulation method, and the simulation device comprises: a first pressure cylinder, which is provided with a cooling pipeline on the outer periphery; or a hollow first pressure cylinder side wall, and a cooling pipeline is arranged in the first pressure cylinder side wall; a heat preservation water tank; an ice maker, which is communicated with the heat preservation water tank through a second water return pipe and then communicated with the other end of the ice maker; the simulation device of the application utilizes the ice maker to cool the heat preservation water tank and deliver the heat preservation water tank into the cooling pipeline to precool the first pressure cylinder, then utilizes the ice maker to generate a certain amount of ice water mixture again, and delivers the ice water mixture into the first pressure cylinder, through the latent heat of fusion of ice and the compression heat generated in the pressure increasing process of the partial sensible heat of ice point water, the water temperature after pressure increasing is controlled in the target temperature range, the temperature uniformity after pressure increasing in the first pressure cylinder is good, the material steel of the first pressure cylinder is not damaged at low temperature, and wall icing under high pressure is not caused.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a deep-sea low-temperature environment simulation device and simulation method. Background Technology

[0002] The deep-sea abyss is characterized by ultra-high pressure (approximately 110 MPa at its deepest point) and low temperature (2℃-4℃). For deep-sea simulation devices, the pressure can be simulated on land using pressurization devices and pressure tanks. However, simulating the temperature under deep-sea pressure is more difficult. The fundamental reason is that after pressurization to 10-200 MPa in the simulation device, the water inside the pressure tank hardly flows, and heat exchange relies mainly on the thermal conductivity of the water. However, water has a low thermal conductivity and high thermal resistance per unit thickness. Pressurization in the simulation device increases the internal energy of the water, causing a temperature rise. To maintain the temperature at 2-4℃ after pressurization, the heat must be removed as quickly as possible. According to the laws of heat transfer, to reduce cooling time and improve the efficiency of the simulation experiment, this can be achieved by increasing the heat exchange temperature difference and reducing the heat exchange path.

[0003] For miniature deep-sea high-pressure simulation devices, current technologies typically involve installing a cooling jacket on the outer wall of the cylinder and injecting a cooling medium into it. Due to the small size and short heat conduction path, the cooling medium effectively removes heat from the internal environment through heat conduction through the cylinder wall. However, large-volume deep-sea high-pressure simulation devices represent the future development trend in this field. Due to their large size, the thermal conductivity of water is much lower than that of steel, and the thermal resistance of the pressurized, static water becomes the primary thermal resistance. To achieve deep-sea high-pressure cryogenic simulation, current methods, such as using a water jacket or coil in the middle or outer layer of the pressurization cylinder wall to circulate a cooling medium (typically requiring a cryogenic working fluid of -20°C to -40°C), are difficult to implement. Furthermore, the cooling medium temperature cannot be too low, requiring consideration of the cryogenic performance of the pressure-resistant steel in the cylinder wall and the hazards of icing on the high-pressure water surface. Therefore, traditional technologies are no longer sufficient for rapid and effective cryogenic control within the deep-sea high-pressure simulation device. Summary of the Invention

[0004] In view of this, the present invention proposes a deep-sea low-temperature environment simulation device and simulation method, which solves or at least partially solves the technical defects existing in the prior art.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a deep-sea low-temperature environment simulation device, comprising:

[0006] The first pressure-resistant cylinder has a cooling pipe on its outer periphery; or, the side wall of the first pressure-resistant cylinder is hollow and a cooling pipe is provided inside the side wall of the first pressure-resistant cylinder.

[0007] The insulated water tank has one end connected to one end of the cooling pipe via a first water inlet pipe, and the other end connected to the other end of the cooling pipe via a first water return pipe.

[0008] An ice maker, one end of which is connected to the insulated water tank via a second return water pipe and then connected to the other end of the ice maker;

[0009] The first pressure-resistant cylinder has one end connected to the insulated water tank via a third return water pipe, and the other end connected to the ice maker or the insulated water tank via a second water injection pipe. Valves are provided on the first water injection pipe, the first return water pipe, the second return water pipe, the third return water pipe, and the second water injection pipe.

[0010] Preferably, the deep-sea low-temperature environment simulation device further includes a pressurization mechanism, which comprises:

[0011] The pressurized water injection pipe has one end connected to the first pressure-resistant cylinder and the other end connected to the insulated water tank.

[0012] A booster pump is located on the booster water injection pipe.

[0013] Preferably, the deep-sea low-temperature environment simulation device further includes a second pressure-resistant cylinder, which is sleeved on the outer periphery of the first pressure-resistant cylinder, and the cooling pipe is located between the first pressure-resistant cylinder and the second pressure-resistant cylinder and sleeved on the outer periphery of the first pressure-resistant cylinder.

[0014] Preferably, in the deep-sea low-temperature environment simulation device, if the second pressure-resistant cylinder is sleeved on the outer periphery of the first pressure-resistant cylinder, the outer periphery of the second pressure-resistant cylinder is also provided with a heat insulation layer;

[0015] If a cooling pipe is provided inside the side wall of the first pressure-resistant cylinder, an insulation layer is also provided on the outer periphery of the first pressure-resistant cylinder.

[0016] Preferably, in the deep-sea low-temperature environment simulation device, the second pressure-resistant cylinder includes a second cylinder body with openings at both ends, the first pressure-resistant cylinder includes a first cylinder body with openings at both ends and flanges located at both ends of the first cylinder body, the second cylinder body is sleeved on the outer periphery of the first cylinder body, and the flanges are respectively covered at the openings at both ends of the first cylinder body and the second cylinder body.

[0017] Preferably, in the deep-sea low-temperature environment simulation device, water pumps are provided on the first return water pipe, the first injection water pipe, the third return water pipe, and the second injection water pipe.

[0018] Preferably, in the deep-sea low-temperature environment simulation device, the pressurized water injection pipe is equipped with a pressurized water injection valve.

[0019] Preferably, in the deep-sea low-temperature environment simulation device, a water tank is formed on the inner wall of the second pressure-resistant cylinder or the outer wall of the first pressure-resistant cylinder, and the water tank forms the cooling pipe.

[0020] Preferably, in the deep-sea low-temperature environment simulation device, the cooling pipes are spirally curved.

[0021] Secondly, the present invention also provides a method for simulating deep-sea low-temperature environments, comprising the following steps:

[0022] Provide the aforementioned deep-sea low-temperature environment simulation device;

[0023] Start the ice maker, open the valve on the second return water pipe, the ice maker takes water from the insulated water tank and cools the water, then returns it to the insulated water tank through the second return water pipe;

[0024] Open the valves on the first water injection pipe and the first water return pipe. The water in the insulated water tank enters the cooling pipe through the first water injection pipe and then returns to the insulated water tank through the first water return pipe. The water in the cooling pipe pre-cools the first pressure-resistant cylinder.

[0025] Place the sample to be tested inside the first pressure-resistant cylinder;

[0026] Open the valve on the second water injection pipe, and the ice maker draws low-temperature water from the insulated water tank. The water is cooled into an ice-water mixture with a certain ice content in the ice maker. The ice-water mixture enters the first pressure-resistant cylinder through the second water injection pipe and reaches the predetermined liquid level.

[0027] Then open the valve on the third return water pipe to return the low-temperature water in the lower layer of the first pressure-resistant cylinder to the heat preservation water tank. After multiple cycles, the water temperature in the first pressure-resistant cylinder is reduced to a predetermined temperature or the ice-water mixture in the first pressure-resistant cylinder reaches a predetermined ice content.

[0028] If the deep-sea low-temperature environment simulation device further includes a pressurized water injection pipe and a pressurized pump, the deep-sea low-temperature environment simulation method further includes the following steps: starting the pressurized pump, the pressurized pump pumps water from the insulated water tank into the first pressure-resistant cylinder, so that the pressure inside the first pressure-resistant cylinder reaches a predetermined pressure.

[0029] The deep-sea low-temperature environment simulation device and method of the present invention have the following advantages over the prior art:

[0030] (1) The deep-sea low-temperature environment simulation device of the present invention includes components such as a first pressure-resistant cylinder, a cooling pipe, an ice maker, and an insulated water tank. The ice maker is used to cool the insulated water tank and transport it to the cooling pipe to pre-cool the first pressure-resistant cylinder. Then, the ice maker is used again to generate a certain amount of ice-water mixture and transport the ice-water mixture to the first pressure-resistant cylinder. The latent heat of melting of ice and part of the sensible heat of ice point water absorb the heat of compression generated during the pressurization process, so that the water temperature after pressurization is controlled within the target temperature range. The temperature uniformity in the first pressure-resistant cylinder after pressurization is good, and it will not cause low-temperature damage to the steel material of the first pressure-resistant cylinder, and it will not cause ice formation on the wall surface under high pressure. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the deep-sea low-temperature environment simulation device in one embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the deep-sea low-temperature environment simulation device in one embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the deep-sea low-temperature environment simulation device in one embodiment of the present invention. Detailed Implementation

[0035] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present application.

[0036] like Figures 1-3 As shown in the figure, this application provides a deep-sea low-temperature environment simulation device, including:

[0037] The first pressure-resistant cylinder 1 has a cooling pipe 2 on its outer periphery; or, the side wall of the first pressure-resistant cylinder 1 is hollow, and the side wall of the first pressure-resistant cylinder has a cooling pipe 2 inside.

[0038] The insulated water tank 3 has one end connected to one end of the cooling pipe 2 via the first water inlet pipe 4, and the other end connected to the other end of the cooling pipe 2 via the first water return pipe 5.

[0039] Ice maker 6, one end of ice maker 6 is connected to insulated water tank 3 through second return water pipe 7 and then connected to the other end of ice maker 6;

[0040] The first pressure-resistant cylinder 1 is connected to the insulated water tank 3 at one end through the third return water pipe 9, and the other end of the first pressure-resistant cylinder 1 is connected to the ice maker 6 or the insulated water tank 3 through the second water injection pipe 21. Valves are provided on the first water injection pipe 4, the first return water pipe 5, the second return water pipe 7, the third return water pipe 9, and the second water injection pipe 21.

[0041] It should be noted that in the deep-sea low-temperature environment simulation device provided in this application embodiment, the first pressure-resistant cylinder 1 is made of pressure-resistant material, such as pressure-resistant stainless steel; a cooling pipe 2 is provided on the outer periphery of the first pressure-resistant cylinder 1 or inside the side wall of the first pressure-resistant cylinder 1, and the water in the cooling pipe 2 can pre-cool the first pressure-resistant cylinder 1; the other end of the first pressure-resistant cylinder 1 is connected to an ice maker 6 or an insulated water tank 3 through a second water injection pipe 21, that is, the second water injection pipe 21 is connected to the insulated water tank 3 through the ice maker 6, or the second water injection pipe 21 is directly connected to the insulated water tank 3; thus, the insulated water tank 3 contains... Low-temperature water is injected into the first pressure-resistant cylinder 1 through the ice maker 6 and the second water injection pipe 21, or the low-temperature water in the insulated water tank 3 is directly injected into the first pressure-resistant cylinder 1 through the second water injection pipe 21; valves are provided on the first water injection pipe 4, the first return water pipe 5, the second return water pipe 7, the third return water pipe 9, and the second water injection pipe 21. Specifically, the first water injection pipe 4 is equipped with a first valve 41, the first return water pipe 5 is equipped with a second valve 51, the second return water pipe 7 is equipped with a third valve 71, the third return water pipe 9 is equipped with a fourth valve 91, and the second water injection pipe 21 is equipped with a fifth valve 22.

[0042] The operating method of the deep-sea low-temperature environment simulation device of this application is as follows: Water is added to the insulated water tank 3, the ice maker 6 is started, and the valve on the second return water pipe 7 is opened. The ice maker 6 draws water from the insulated water tank 3, the water is cooled after being cooled by the ice maker 6, and then returns to the insulated water tank 3 through the second return water pipe 7. This cycle is repeated multiple times until the water in the insulated water tank 3 is cooled to near the freezing point. Subsequently, the ice maker 6 continues to work, and at the same time, the valves on the first water inlet pipe 4 and the first return water pipe 5 are opened, and the low-temperature water in the insulated water tank 3 passes through...

[0043] The first water inlet pipe 4 enters the cooling pipe 2, then returns to the insulated water tank 3 via the first return pipe 5. During this process, the low-temperature water in the cooling pipe 2 pre-cools the first pressure-resistant cylinder 1. After exchanging heat with the first pressure-resistant cylinder 1, the water in the cooling pipe 2 rises in temperature and enters the insulated water tank 3, transferring heat to the low-temperature water inside. Since the ice maker 6 continues to operate, some of the heated water in the insulated water tank 3 enters the ice maker 6 for further cooling. This cycle is repeated multiple times, transferring the heat capacity of the first pressure-resistant cylinder 1 to the ice maker 6. Finally, the temperature of the first pressure-resistant cylinder 1 drops to near the freezing point of water. The first pressure-resistant cylinder 1 is pre-cooled and cooled down. Then, the sample to be tested is placed in the first pressure-resistant cylinder 1, the valve on the second water injection pipe 21 is opened, and the ice maker 6 continues to work. The ice maker 6 draws low-temperature water from the insulated water tank 3 and cools it into an ice-water mixture with a certain ice content in the ice maker 6. The ice-water mixture enters the first pressure-resistant cylinder 1 through the second water injection pipe 21 and reaches the predetermined liquid level. Then, the valve on the third return water pipe 9 is opened to return the lower layer of the ice-water mixture in the first pressure-resistant cylinder 1 to the insulated water tank through the third return water pipe 9. After multiple cycles, a certain amount of ice can be accumulated in the first pressure-resistant cylinder 1. The deep-sea low-temperature environment simulation device of this application includes components such as cooling pipe 2, ice maker, and insulated water tank. The ice maker cools the insulated water tank and transports it to the cooling pipe 2 to pre-cool the first pressure-resistant cylinder. Then, the ice maker generates a certain amount of ice-water mixture and transports it to the first pressure-resistant cylinder. The latent heat of melting of ice and part of the sensible heat of the ice-point water absorb the heat of compression generated during the pressurization process, so that the water temperature after pressurization is controlled within the target temperature range. It can achieve temperature control of 2~4℃. Moreover, the temperature uniformity in the first pressure-resistant cylinder after pressurization is good, and it will not cause low-temperature damage to the steel material of the first pressure-resistant cylinder. It will not cause ice formation on the wall surface under high pressure, and the simulation experiment can be carried out immediately after pressurization, with a short waiting time.

[0044] In the above embodiments, the ice maker 6 is the source of cooling for the entire device. The ice maker 6 can be a fluidized bed ice maker, a vacuum ice maker, a subcooled ice maker, a scraping ice maker, or a direct contact ice maker. A single ice maker can meet the system's cooling requirements; alternatively, multiple ice makers can be used, serving as backups for each other while meeting the system's cooling requirements, thus improving system reliability.

[0045] In some embodiments, the insulated water tank 3 is used to store low-temperature water. The internal volume of the insulated water tank 3 is greater than the sum of the internal volume of the first pressure-resistant cylinder 1 and the volume of all pipelines, ensuring that the first pressure-resistant cylinder 1 can be filled with water, the cooling pipe 2 can circulate normally, and the booster pump supplies sufficient water.

[0046] In some embodiments, a pressurization mechanism is also included, comprising:

[0047] The pressurized water injection pipe 8 has one end connected to the first pressure-resistant cylinder 1 and the other end connected to the insulated water tank 3;

[0048] Booster pump 81 is located on booster water injection pipe 8.

[0049] In the above embodiment, the pressurized water injection pipe 8 is connected to the insulated water tank 3. After a certain amount of ice accumulates in the first pressure-resistant cylinder 1, the low-temperature water in the insulated water tank 3 is pumped into the first pressure-resistant cylinder 1 by the booster pump 81 to pressurize the first pressure-resistant cylinder 1 to a specified pressure (e.g., 100MPa~200MPa). The ice in the ice-water mixture in the first pressure-resistant cylinder 1 gradually melts to offset the heat of compression. After pressurization, the water temperature in the first pressure-resistant cylinder 1 can be controlled at 2~4℃, or other predetermined temperatures. Subsequently, a pressure holding experiment is carried out according to the sample requirements. During the entire experiment, the low-temperature water in the cooling pipe 2 continuously cools the first pressure-resistant cylinder 1, and the ice maker 6 controls its start-up, shutdown, and working time according to the water temperature in the insulated water tank 3. In addition to the above-mentioned implementation method using the booster pump 81, the pressurization mechanism can also use gas pressurization, such as by introducing high-pressure gas into the first pressure-resistant cylinder 1 to achieve a high-pressure environment.

[0050] In some embodiments, a second pressure-resistant cylinder 10 is further included, which is sleeved on the outer periphery of the first pressure-resistant cylinder 1, and the cooling pipe 2 is located between the first pressure-resistant cylinder 1 and the second pressure-resistant cylinder 10 and is sleeved on the outer periphery of the first pressure-resistant cylinder 1.

[0051] In the above embodiment, if the second pressure-resistant cylinder 10 is sleeved on the outer periphery of the first pressure-resistant cylinder 1, the outer periphery of the second pressure-resistant cylinder 10 is also provided with a heat insulation layer 11;

[0052] If a cooling pipe 2 is provided inside the side wall of the first pressure-resistant cylinder 1, an insulation layer 11 is also provided on the outer periphery of the first pressure-resistant cylinder 1.

[0053] Specifically, when the cooling pipe 2 is located between the second pressure-resistant cylinder 10 and the first pressure-resistant cylinder 1, an insulation layer 11 is provided around the outer periphery of the second pressure-resistant cylinder 10; when the side wall of the first pressure-resistant cylinder 1 is hollow and the cooling pipe 2 is located inside the side wall of the first pressure-resistant cylinder 1, an insulation layer 11 is provided around the outer periphery of the first pressure-resistant cylinder 1; when the cooling pipe 2 is located around the outer periphery of the first pressure-resistant cylinder 1, an insulation layer 11 is provided around the outer periphery of the first pressure-resistant cylinder 1. By providing the insulation layer 11, heat conduction from the surrounding environment to the first pressure-resistant cylinder 1 can be reduced, thereby reducing the heat load of the ice maker and saving energy. The insulation layer 11 can be made of insulation cotton, or it can be made of foam or other materials with equivalent heat insulation effect.

[0054] In some embodiments, the second pressure-resistant cylinder 10 includes a second cylinder body with openings at both ends, and the first pressure-resistant cylinder 1 includes a first cylinder body 12 with openings at both ends and flanges 13 located at both ends of the first cylinder body 12. The second cylinder body is sleeved on the outer periphery of the first cylinder body 12, and the flanges 13 cover the openings at both ends of the first cylinder body 12 and the second cylinder body, respectively.

[0055] In the above embodiment, the insulation layer 11 is disposed on the outer peripheral surface of the second cylinder and the outer surface of the flange 13; the flange cover located at the lower end of the first cylinder 12 is disposed at the lower end of the first cylinder 12 and the second cylinder and is fixed to the first cylinder 12 and the second cylinder, specifically, it can be fixed by welding, while the flange cover located at the upper end of the first cylinder 12 is disposed at the upper end of the first cylinder 12 and the second cylinder and is directly and detachably fixed to the first cylinder 12 and the second cylinder, for example, the flange is fixed to the upper end of the first cylinder 12 and the second cylinder by bolts, or the flange is threaded to the upper end of the first cylinder 12. In practice, the pressure-bearing sealing capability is achieved by sealing the contact surface between the flange and the upper end of the first cylinder 12 and the second cylinder through a sealing structure. Specifically, a sealing ring can be provided at the contact surface between the flange and the upper end of the first cylinder 12 and the second cylinder; a sealed chamber is formed by the flange located at the first cylinder 12 and the flange located at the upper and lower ends of the first cylinder 12. Obviously, the flange located at the upper end of the first cylinder 12 is directly and detachably fixed to the first cylinder 12 and the second cylinder. In this way, when conducting pressure tests, the flange at the upper end of the first cylinder 12 can be removed, and then the sample or device to be tested can be placed into the first cylinder 12 and the flange can be fixed.

[0056] In some embodiments, a cold water tank is provided on the flange 13. During the pressure test, cold water can be introduced into the cold water tank on the flange 13 to remove heat from the external heat-conducting environment and prevent the temperature of the test water entering the first pressure-resistant cylinder 1 from rising.

[0057] In some embodiments, water pumps are provided on the first return water pipe 5, the first injection water pipe 4, the third return water pipe 9, and the second injection water pipe 21. Specifically, a first water pump (not shown) is provided on the first return water pipe 5, a second water pump 42 is provided on the first injection water pipe 4, a third water pump 92 is provided on the third return water pipe 9, and a fourth water pump 23 is provided on the second injection water pipe 21.

[0058] In some embodiments, a pressure-boosting water injection valve 82 is provided on the pressure-boosting water injection pipe 8.

[0059] In some embodiments, a water tank is provided on the inner wall of the second pressure-resistant cylinder 10 or the outer wall of the first pressure-resistant cylinder 1, and the water tank forms a cooling pipe 2.

[0060] It is understood that in the above embodiments, if the cooling pipe 2 is located on the outer periphery of the first pressure-resistant cylinder 1, or if the cooling pipe 2 is directly located on the side wall of the first pressure-resistant cylinder 1, compared with the cooling pipe 2 being located between the first pressure-resistant cylinder 1 and the second pressure-resistant cylinder 10, the reduction of one pressure-resistant cylinder will inevitably make the processing of the entire device simpler.

[0061] In some embodiments, the cooling pipe 2 is spirally curved.

[0062] In the above embodiment, since the cooling pipe 2 is spirally bent, the heat exchange area between the cooling pipe 2 and the first pressure-resistant cylinder 1 is greatly increased, which greatly improves the heat exchange effect.

[0063] In some embodiments, the first water inlet pipe 4, the first water return pipe 5, the second water return pipe 7, the third water return pipe 9, the second water inlet pipe 21, and the valves and water pumps on these pipes are all wrapped with thermal insulation material to reduce heat leakage.

[0064] For details, please refer to the following again. Figure 1 , Figure 1 In the first pressure-resistant cylinder 1, there is a first cylinder body 12 and flanges 13 located at the upper and lower openings of the first cylinder body 12. The cooling pipe 2 is located on the outer periphery of the first cylinder body 12, while the heat insulation layer 11 is located on the outer periphery of the cooling pipe 2 and the outer side of the flange 13. The third return water pipe 9, the second water injection pipe 21 and the pressurized water injection pipe 8 all pass through the heat insulation layer 11 and the flange 13 and are connected to the chamber of the first cylinder body 12. Furthermore, the second water injection pipe 21 is connected to the ice maker 6 and then to the heat-insulated water tank.

[0065] Please refer to this again. Figure 2 , Figure 2 In the middle, the cooling pipe 2 is located between the first cylinder 12 and the second cylinder, the flange 13 is located on the upper and lower openings of the first cylinder 12 and the second cylinder, the insulation layer 11 is located on the outer periphery of the second cylinder and the outer side of the flange 13, and the second water injection pipe 21 is directly connected to the insulated water tank 3; and with Figure 1 Compared with the technical solutions in China, Figure 2 In the proposed technical solution, the ice maker 6 no longer directly injects the ice-water mixture into the first pressure-resistant cylinder 1. Instead, it injects the ice-water mixture into the insulated water tank 3, where the required amount of ice accumulates. Since the ice concentration in the ice-water mixture at the outlet of the ice maker 6 is low, some ice-water separation occurs in the insulated water tank, increasing the concentration of the upper layer of ice slurry. Therefore, a fourth water pump 23 is installed on the second water injection pipe 21 to transport the ice-water mixture from the insulated water tank 3 to the first pressure-resistant cylinder 1. Specifically, the second water injection pipe 21 is connected to the upper end of the insulated water tank 3, allowing the higher concentration ice-water mixture from the upper layer of the insulated water tank 3 to be transported to the first pressure-resistant cylinder 1.

[0066] Please refer to this again. Figure 3 , Figure 3The technical solution in the middle integrates Figures 1-2 The technical solutions of both countries. Specifically, Figure 3 In the middle, the cooling pipe 2 is located on the outer periphery of the first cylinder 12, while the insulation layer 11 is located on the outer periphery of the cooling pipe 2 and the outer side of the flange 13. The second water injection pipe 21 is directly connected to the insulation water tank 3.

[0067] Based on the same inventive concept, this application also provides a method for simulating deep-sea low-temperature environments, comprising the following steps:

[0068] S1. Provide the aforementioned deep-sea low-temperature environment simulation device;

[0069] S2. Start the ice maker, open the valve on the second return water pipe, the ice maker takes water from the insulated water tank and cools the water, then returns it to the insulated water tank through the second return water pipe;

[0070] S3. Open the valves on the first water injection pipe and the first water return pipe. The water in the heat preservation water tank enters the cooling pipe through the first water injection pipe and then returns to the heat preservation water tank through the first water return pipe. The water in the cooling pipe pre-cools the first pressure-resistant cylinder.

[0071] S4. Place the sample to be tested inside the first pressure-resistant cylinder;

[0072] S5. Open the valve on the second water injection pipe. The ice maker draws low-temperature water from the insulated water tank and cools it into an ice-water mixture with a certain ice content inside the ice maker. The ice-water mixture enters the first pressure-resistant cylinder through the second water injection pipe and reaches the predetermined liquid level.

[0073] S6. Then open the valve on the third return water pipe to return the low-temperature water in the lower layer of the first pressure-resistant cylinder to the heat preservation water tank. After multiple cycles, the water temperature in the first pressure-resistant cylinder is reduced to the predetermined temperature or the ice-water mixture in the first pressure-resistant cylinder reaches the predetermined ice content.

[0074] If the deep-sea cryogenic environment simulation device also includes a pressurized water injection pipe and a pressurized pump, the deep-sea cryogenic environment simulation method also includes the following steps:

[0075] S7. Start the booster pump. The booster pump will pump the water in the insulated water tank into the first pressure-resistant cylinder, so that the pressure in the first pressure-resistant cylinder reaches the predetermined pressure.

[0076] Specifically, in the above-mentioned deep-sea low-temperature environment simulation method, the step of placing the sample to be tested in the first pressure-resistant cylinder in S4 can also be performed before the pre-cooling step of the first pressure-resistant cylinder. That is, before pre-cooling the first pressure-resistant cylinder, the sample to be tested is placed directly in the first pressure-resistant cylinder, and then the first pressure-resistant cylinder is pre-cooled.

[0077] The above-mentioned deep-sea low-temperature environment simulation method, if the second water injection pipe of the deep-sea low-temperature environment simulation device is connected to the ice maker and then to the insulated water tank (i.e., using...) Figure 1 If the connection method is as follows, then step S5 is as follows: Open the valve on the second water inlet pipe and simultaneously close the valve on the second return water pipe. The ice maker draws low-temperature water from the insulated water tank, which is cooled into an ice-water mixture with a certain ice content inside the ice maker. The ice-water mixture is then fed into the first pressure-resistant cylinder through the second water inlet pipe and reaches the predetermined liquid level. If the second water inlet pipe of the deep-sea low-temperature environment simulation device is directly connected to the insulated water tank (i.e., using...), then step S5 is as follows: Figures 2-3 (If the connection method is as follows), then step S5 is as follows: open the valve on the second water inlet pipe and at the same time open the valve on the second water return pipe. The ice maker draws low-temperature water from the insulated water tank and cools it into an ice-water mixture with a certain ice content. The mixture is then returned to the insulated water tank and pumped into the first pressure-resistant cylinder by the water pump on the second water inlet pipe until the predetermined liquid level is reached.

[0078] The above description is only a partial embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A deep-sea low-temperature environment simulation device, characterized in that, include: The first pressure-resistant cylinder has a cooling pipe on its outer periphery; or, the side wall of the first pressure-resistant cylinder is hollow and a cooling pipe is provided inside the side wall of the first pressure-resistant cylinder. The insulated water tank has one end connected to one end of the cooling pipe via a first water inlet pipe, and the other end connected to the other end of the cooling pipe via a first water return pipe. An ice maker, one end of which is connected to the insulated water tank via a second return water pipe and then connected to the other end of the ice maker; A pressurization mechanism, comprising: The pressurized water injection pipe has one end connected to the first pressure-resistant cylinder and the other end connected to the insulated water tank. A booster pump, located on the booster water injection pipe; The first pressure-resistant cylinder has one end connected to the insulated water tank via a third return water pipe, and the other end connected to the ice maker or the insulated water tank via a second water injection pipe. Valves are provided on the first water injection pipe, the first return water pipe, the second return water pipe, the third return water pipe, and the second water injection pipe. Water pumps are provided on the first return water pipe, the first water injection pipe, the third return water pipe, and the second water injection pipe.

2. The deep-sea low-temperature environment simulation device as described in claim 1, characterized in that, It also includes a second pressure-resistant cylinder, which is sleeved on the outer periphery of the first pressure-resistant cylinder, and the cooling pipe is located between the first pressure-resistant cylinder and the second pressure-resistant cylinder and is sleeved on the outer periphery of the first pressure-resistant cylinder.

3. The deep-sea low-temperature environment simulation device as described in claim 2, characterized in that, If the second pressure-resistant cylinder is sleeved on the outer periphery of the first pressure-resistant cylinder, the outer periphery of the second pressure-resistant cylinder is also provided with a heat insulation layer; If a cooling pipe is provided inside the side wall of the first pressure-resistant cylinder, an insulation layer is also provided on the outer periphery of the first pressure-resistant cylinder.

4. The deep-sea low-temperature environment simulation device as described in claim 2, characterized in that, The second pressure-resistant cylinder includes a second cylinder body with openings at both ends. The first pressure-resistant cylinder includes a first cylinder body with openings at both ends and flanges located at both ends of the first cylinder body. The second cylinder body is sleeved on the outer periphery of the first cylinder body, and the flanges are respectively covered at the openings at both ends of the first cylinder body and the second cylinder body.

5. The deep-sea low-temperature environment simulation device as described in claim 1, characterized in that, The booster water injection pipe is equipped with a booster water injection valve.

6. The deep-sea low-temperature environment simulation device as described in claim 2, characterized in that, A water trough is provided on the inner wall of the second pressure-resistant cylinder or the outer wall of the first pressure-resistant cylinder, and the water trough forms the cooling pipe.

7. The deep-sea low-temperature environment simulation device as described in claim 1, characterized in that, The cooling pipes are spirally curved.

8. A method for simulating deep-sea low-temperature environments, characterized in that, Includes the following steps: Provide a deep-sea cryogenic environment simulation device as described in any one of claims 1 to 7; Start the ice maker, open the valve on the second return water pipe, the ice maker takes water from the insulated water tank and cools the water, then returns it to the insulated water tank through the second return water pipe; Open the valves on the first water injection pipe and the first water return pipe. The water in the insulated water tank enters the cooling pipe through the first water injection pipe and then returns to the insulated water tank through the first water return pipe. The water in the cooling pipe pre-cools the first pressure-resistant cylinder. Place the sample to be tested inside the first pressure-resistant cylinder; Open the valve on the second water injection pipe, and the ice maker draws low-temperature water from the insulated water tank. The water is cooled into an ice-water mixture with a certain ice content in the ice maker. The ice-water mixture enters the first pressure-resistant cylinder through the second water injection pipe and reaches the predetermined liquid level. Then open the valve on the third return water pipe to return the low-temperature water in the lower layer of the first pressure-resistant cylinder to the heat preservation water tank. After multiple cycles, the water temperature in the first pressure-resistant cylinder is reduced to a predetermined temperature or the ice-water mixture in the first pressure-resistant cylinder reaches a predetermined ice content. If the deep-sea low-temperature environment simulation device further includes a pressurized water injection pipe and a pressurized pump, the deep-sea low-temperature environment simulation method further includes the following steps: starting the pressurized pump, the pressurized pump pumps water from the insulated water tank into the first pressure-resistant cylinder, so that the pressure inside the first pressure-resistant cylinder reaches a predetermined pressure.

Images