Liquid high and low temperature alternating test equipment

Abstract

The utility model relates to a kind of liquid high-low temperature alternating test equipment, it relates to temperature test equipment technical field, including low temperature liquid tank, high temperature liquid tank, buffer liquid tank and test cavity, low temperature liquid tank, high temperature liquid tank, buffer liquid tank are respectively communicated with test cavity by low temperature water inlet pipe, high temperature water inlet pipe and backwater main pipe, low temperature liquid tank and high temperature liquid tank are also respectively communicated with low temperature backwater pipe and high temperature backwater pipe communicated with backwater main pipe, first stop valve is equipped on backwater main pipe, first low temperature regulating valve and first high temperature regulating valve are respectively equipped on low temperature backwater pipe and high temperature backwater pipe, backwater main pipe is also equipped with first temperature transmitter.Using the above technical scheme, in the process of high temperature test and low temperature test mutual switching, high temperature liquid in test cavity is returned to high temperature liquid tank, low temperature liquid is returned to low temperature liquid tank, and the mixed liquid of high temperature liquid and low temperature liquid is discharged into buffer liquid tank, so as to reduce the energy consumption of equipment, shorten test cycle, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of temperature testing equipment technology, specifically to a liquid high and low temperature alternating testing equipment. Background Technology

[0002] Liquid high and low temperature alternating test equipment is a key device for evaluating the reliability of products under extreme temperature and rapid change environments. Its core function is to rapidly and accurately cycle the liquid medium in the test chamber between set high and low temperatures to simulate harsh temperature alternating conditions.

[0003] Liquid high and low temperature alternating test equipment typically employs a dual-tank system architecture, consisting of independently set up high-temperature and low-temperature tanks, with valves controlling the liquid flow. However, during the switching between high-temperature and low-temperature testing, the risk of "temperature cross-contamination"—where high-temperature liquid accidentally flows into the low-temperature tank or vice versa—is extremely high.

[0004] To avoid the problem of "temperature cross-contamination," an intermediate water tank is usually added to the original dual-tank system architecture. This allows the liquid discharged from the test chamber and the residual liquid in the pipeline to be directly discharged into the intermediate water tank when switching between high-temperature and low-temperature tests. After the liquid in the test chamber is completely replaced with the target liquid, the high-temperature liquid circulation test or the low-temperature liquid circulation test is then performed. This avoids the situation where high-temperature liquid accidentally flows into the low-temperature water tank or low-temperature liquid accidentally flows into the high-temperature water tank.

[0005] However, while this method effectively avoids the "temperature cross-contamination" problem caused by high-temperature liquid accidentally flowing into the low-temperature tank or vice versa, the liquid initially discharged into the transfer tank is residual liquid from the previous test in the testing chamber. This residual liquid could be directly recycled back to the low-temperature or high-temperature tank. However, after being directly discharged into the transfer tank, some of the liquid from the next test enters the transfer tank and mixes with the residual liquid from the previous test, forming a mixture of high-temperature and low-temperature liquids. This mixture needs to be cooled or heated until its temperature reaches the requirements of the target tank before it can be reused. This not only wastes energy and increases the equipment's energy consumption but also prolongs the testing cycle and reduces testing efficiency. Utility Model Content

[0006] The purpose of this invention is to solve the problems of existing liquid high and low temperature alternating test equipment, which, due to the use of a dual-tank system architecture, are prone to "temperature cross-contamination" during the switching between high-temperature and low-temperature tests, resulting in unstable tank temperature, slow liquid test temperature alternation speed, and low test structure reliability. This invention provides a liquid high and low temperature alternating test equipment.

[0007] The technical solution adopted by this utility model is: a liquid high and low temperature alternating test device, including a low temperature liquid tank, a high temperature liquid tank, a buffer liquid tank and a test chamber. The low temperature liquid tank, the high temperature liquid tank and the buffer liquid tank are respectively connected to the test chamber through a low temperature water inlet pipe, a high temperature water inlet pipe and a return water main pipe. The low temperature liquid tank and the high temperature liquid tank are also respectively connected to a low temperature return water pipe and a high temperature return water pipe. Both the low temperature return water pipe and the high temperature return water pipe are connected to the return water main pipe.

[0008] The return water main pipe is equipped with a first shut-off valve at one end near the buffer liquid tank. The low-temperature return water pipe and the high-temperature return water pipe are respectively equipped with a first low-temperature regulating valve and a first high-temperature regulating valve. The return water main pipe is also equipped with a first temperature transmitter for detecting its internal temperature. The temperature of the liquid in the return water main pipe is detected in real time by the first temperature transmitter, and the first high-temperature regulating valve, the first low-temperature regulating valve and the first shut-off valve are opened or closed accordingly, so that the high-temperature liquid or low-temperature liquid in the return water main pipe can flow back to the high-temperature liquid tank or the low-temperature liquid tank. The mixture of high-temperature liquid and low-temperature liquid in the return water main pipe flows into the buffer liquid tank.

[0009] Optionally, the low-temperature water inlet pipe is also equipped with a second shut-off valve, a low-temperature circulation pump, and a low-temperature switching valve. The second shut-off valve is located at the end of the low-temperature water inlet pipe near the low-temperature water tank, the low-temperature switching valve is located at the end of the low-temperature water inlet pipe near the test chamber, and the low-temperature circulation pump is located between the second shut-off valve and the low-temperature switching valve.

[0010] Optionally, the high-temperature water inlet pipe is also equipped with a third shut-off valve, a high-temperature circulation pump, and a high-temperature switching valve. The third shut-off valve is located at the end of the high-temperature water inlet pipe near the high-temperature water tank, the high-temperature switching valve is located at the end of the high-temperature water inlet pipe near the test chamber, and the high-temperature circulation pump is located between the third shut-off valve and the high-temperature switching valve.

[0011] Optionally, the cryogenic liquid tank is also connected to a cryogenic regulating pipe, the end of which is away from the cryogenic liquid tank is connected to a cryogenic water inlet pipe, the connection between the cryogenic regulating pipe and the cryogenic water inlet pipe is located between the cryogenic circulating pump and the cryogenic switching valve, and a second cryogenic regulating valve is provided on the cryogenic regulating pipe for adjusting the internal liquid flow rate.

[0012] Optionally, the cryogenic regulating pipe is also provided with a fourth shut-off valve, which is located on the side of the second cryogenic regulating valve near the cryogenic liquid tank.

[0013] Optionally, the high-temperature liquid tank is also connected to a high-temperature regulating pipe, the end of which is away from the high-temperature liquid tank is connected to a high-temperature water inlet pipe, the connection between the high-temperature regulating pipe and the high-temperature water inlet pipe is located between the high-temperature circulating pump and the high-temperature switching valve, and a second high-temperature regulating valve is provided on the high-temperature regulating pipe for adjusting the internal liquid flow rate.

[0014] Optionally, a fifth shut-off valve is also provided on the high-temperature regulating pipe, and the fifth shut-off valve is located on the side of the second high-temperature regulating valve near the high-temperature liquid tank.

[0015] Optionally, the test chamber is provided with a first water inlet, a second water inlet, a first water outlet, and a second water outlet. The low-temperature water inlet pipe and the high-temperature water inlet pipe are respectively connected to the first water inlet and the second water inlet. The first water outlet and the second water outlet are respectively connected to a first water outlet pipe and a second water outlet pipe. The ends of the first water outlet pipe and the second water outlet pipe that are away from the test chamber are both connected to the main return water pipe.

[0016] Optionally, a pressure transmitter and a second temperature transmitter are also provided on the low-temperature water inlet pipe. The pressure transmitter and the first temperature transmitter are sequentially located between the low-temperature switching valve and the first water inlet. A connecting pipe connects the low-temperature water inlet pipe and the high-temperature water inlet pipe. The two ends of the connecting pipe are respectively connected to the end of the low-temperature water inlet pipe near the first water inlet and the end of the high-temperature water inlet pipe near the second water inlet.

[0017] Optionally, a sixth shut-off valve is provided on the end of the low-temperature water inlet pipe near the first water inlet, the end of the high-temperature water inlet pipe near the second water inlet, the first water outlet pipe, and the second water outlet pipe. The sixth shut-off valves on the low-temperature water inlet pipe and the high-temperature water inlet pipe are respectively located on the side of the connecting pipe near the first water inlet and the side of the connecting pipe near the second water inlet.

[0018] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0019] This application achieves real-time detection of the liquid temperature flowing from the test chamber into the return water main by installing a first high-temperature regulating valve on the high-temperature return water pipe, a first low-temperature regulating valve on the low-temperature return water pipe, a first shut-off valve at the end of the return water main near the buffer tank, and a first temperature transmitter on the return water main. This is accomplished during the switching between high-temperature and low-temperature testing. By closing the first shut-off valve and opening the first or second low-temperature regulating valve accordingly based on the liquid temperature detected by the first temperature transmitter, the liquid flowing from the high-temperature chamber back to the high-temperature tank or vice versa can be redirected. The liquid flows into the cryogenic liquid tank. When the temperature of the liquid detected by the first temperature transmitter is higher than that of the liquid in the cryogenic liquid tank but lower than that of the liquid in the high-temperature liquid tank, the first shut-off valve is opened and the first high-temperature regulating valve or the first low-temperature regulating valve is closed, allowing the liquid to flow into the buffer tank. This achieves the return of the high-temperature liquid (or cryogenic liquid) remaining from the previous test to the high-temperature liquid tank (or cryogenic liquid tank). The mixture of high-temperature liquid and cryogenic liquid flows into the buffer tank, avoiding the situation where all the remaining liquid is discharged into the buffer tank, which would cause energy waste. This reduces the energy consumption of the equipment, shortens the test cycle, and improves the test efficiency. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of this embodiment.

[0022] Explanation of reference numerals in the attached drawings: 10. Cryogenic liquid tank; 11. Cryogenic inlet pipe; 111. Second shut-off valve; 112. Cryogenic circulating pump; 113. Cryogenic switching valve; 114. Pressure transmitter; 115. Second temperature transmitter; 12. Cryogenic return pipe; 121. First cryogenic regulating valve; 13. Cryogenic regulating pipe; 131. Second cryogenic regulating valve; 132. Fourth shut-off valve; 14. Connecting pipe;

[0023] 20. High-temperature liquid tank; 21. High-temperature water inlet pipe; 211. Third shut-off valve; 212. High-temperature circulating pump; 213. High-temperature switching valve; 22. High-temperature return water pipe; 221. First high-temperature regulating valve; 23. High-temperature regulating pipe; 231. Second high-temperature regulating valve; 232. Fifth shut-off valve;

[0024] 30. Buffer liquid tank; 31. Return water main pipe; 311. First shut-off valve; 312. First temperature transmitter;

[0025] 40. Test chamber; 41. First water inlet; 42. Second water inlet; 43. First water outlet; 44. Second water outlet; 45. First water outlet pipe; 46. Second water outlet pipe; 47. Sixth shut-off valve. Detailed Implementation

[0026] The following will refer to the appendices in the embodiments of the present invention. Figure 1 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] This embodiment relates to a liquid high and low temperature alternating test device, referring to... Figure 1 It includes a low-temperature liquid tank 10, a high-temperature liquid tank 20, a buffer liquid tank 30, and a test chamber 40. The low-temperature liquid tank 10 and the test chamber 40 are connected by a low-temperature water inlet pipe 11, the high-temperature liquid tank 20 and the test chamber 40 are connected by a high-temperature water inlet pipe 21, the buffer liquid tank 30 and the test chamber 40 are connected by a return water main pipe 31, the low-temperature liquid tank 10 and the high-temperature liquid tank 20 are also connected by a low-temperature return water pipe 12 and a high-temperature return water pipe 22, respectively, and both the low-temperature return water pipe 12 and the high-temperature return water pipe 22 are connected to the return water main pipe 31.

[0030] A first shut-off valve 311 is provided at one end of the return water main pipe 31 near the buffer liquid tank 30. A first low-temperature regulating valve 121 and a first high-temperature regulating valve 221 are respectively provided on the low-temperature return water pipe 12 and the high-temperature return water pipe 22. A first temperature transmitter 312 for detecting its internal temperature is also provided on the return water main pipe 31. The temperature of the liquid in the return water main pipe 31 is detected in real time by the first temperature transmitter 312, and the first high-temperature regulating valve 221, the first low-temperature regulating valve 121 and the first shut-off valve 311 are opened or closed accordingly, so that the high-temperature liquid or low-temperature liquid in the return water main pipe 31 can flow back to the high-temperature liquid tank 20 or the low-temperature liquid tank 10, and the mixture of high-temperature liquid and low-temperature liquid in the return water main pipe 31 flows into the buffer liquid tank 30.

[0031] When switching from low-temperature testing to high-temperature testing, the liquids in the test chamber 40 and the return water main pipe 31 are both low-temperature liquids. At this time, the supply of low-temperature liquid to the test chamber 40 is stopped, and high-temperature liquid is supplied to the test chamber 40 through the high-temperature water inlet pipe 21. Then, the first low-temperature regulating valve 121 is opened, and the first shut-off valve 311 and the high-temperature regulating valve are closed, so that the low-temperature liquid in the test chamber 40 and the return water main pipe 31 is transported by the high-temperature water inlet pipe 21 to the high-temperature liquid in the test chamber 40 and squeezed into the low-temperature liquid tank 10. When the first temperature transmitter 312 detects a change in the liquid temperature in the return water main pipe (at this time, the mixture of high-temperature liquid and low-temperature liquid enters the return water main pipe), the first low-temperature regulating valve 121 is closed and the first shut-off valve 311 is opened, so that the mixture in the return water main pipe is discharged into the buffer liquid tank 30. This effectively avoids the situation where high-temperature liquid flows into the low-temperature liquid tank 10 and low-temperature liquid flows into the high-temperature liquid tank 20, reduces energy loss, realizes rapid replenishment of the low-temperature liquid tank 10 and the high-temperature liquid tank 20, shortens the test cycle, and thus improves the test efficiency.

[0032] It should be noted that the principle of switching from high-temperature testing to low-temperature testing is basically the same as that of switching from low-temperature testing to high-temperature testing, so it will not be elaborated on here.

[0033] Furthermore, the low-temperature water inlet pipe 11 is also equipped with a second shut-off valve 111, a low-temperature circulation pump 112, and a low-temperature switching valve 113. The second shut-off valve 111 is located at the end of the low-temperature water inlet pipe 11 near the low-temperature water tank, the low-temperature switching valve 113 is located at the end of the low-temperature water inlet pipe 11 near the test chamber 40, and the low-temperature circulation pump 112 is located between the second shut-off valve 111 and the low-temperature switching valve 113.

[0034] Understandably, the cryogenic circulation pump 112 is used to pump the cryogenic liquid from the cryogenic water tank to the test chamber 40 for cryogenic testing. The second shut-off valve 111 effectively controls the opening and closing of the cryogenic inlet pipe 11, preventing cryogenic liquid from continuing to flow into the test chamber 40 when cryogenic testing is not required, thus avoiding energy waste. The cryogenic switching valve 113 can quickly cut off the liquid supply from the cryogenic inlet pipe 11 when a test temperature switch is needed, ensuring that the liquid temperature in the test chamber 40 changes according to a preset program. This not only improves the flexibility of the equipment but also further enhances its testing accuracy and efficiency.

[0035] Furthermore, the high-temperature water inlet pipe 21 is also equipped with a third shut-off valve 211, a high-temperature circulation pump 212, and a high-temperature switching valve 213. The third shut-off valve 211 is located at the end of the high-temperature water inlet pipe 21 near the high-temperature water tank, the high-temperature switching valve 213 is located at the end of the high-temperature water inlet pipe 21 near the test chamber 40, and the high-temperature circulation pump 212 is located between the third shut-off valve 211 and the high-temperature switching valve 213.

[0036] Understandably, the high-temperature circulating pump 212 is used to pump the high-temperature liquid from the high-temperature water tank to the test chamber 40 for high-temperature testing. The third shut-off valve 211 effectively controls the opening and closing of the high-temperature inlet pipe 21, preventing the high-temperature liquid from continuing to flow into the test chamber 40 when high-temperature testing is not required, thus saving energy. The high-temperature switching valve 213 can quickly cut off the liquid supply from the high-temperature inlet pipe 21 when the test temperature needs to be switched, ensuring that the liquid temperature in the test chamber 40 changes precisely according to the preset program.

[0037] Furthermore, the cryogenic liquid tank 10 is also connected to a cryogenic regulating pipe 13. The end of the cryogenic regulating pipe 13 away from the cryogenic liquid tank 10 is connected to the cryogenic water inlet pipe 11. The connection between the cryogenic regulating pipe 13 and the cryogenic water inlet pipe 11 is located between the cryogenic circulating pump 112 and the cryogenic switching valve 113. A second cryogenic regulating valve 131 for regulating the internal liquid flow rate is provided on the cryogenic regulating pipe 13.

[0038] Understandably, the inclusion of the cryogenic regulating pipe 13 and the second cryogenic regulating valve 131 allows operators to flexibly adjust the flow rate of the liquid in the cryogenic regulating pipe 13 according to actual needs. This not only allows for precise control of the amount of cryogenic liquid entering the test chamber 40, but also enables further refinement of the liquid temperature regulation within the test chamber 40, thereby meeting more stringent testing requirements. Furthermore, the precise control of the second cryogenic regulating valve 131 also helps improve the testing accuracy and stability of the equipment, ensuring the accuracy and reliability of the test results.

[0039] Furthermore, a fourth shut-off valve 132 is also provided on the cryogenic regulating pipe 13, which is located on the side of the second cryogenic regulating valve 131 near the cryogenic liquid tank 10.

[0040] Understandably, the fourth shut-off valve 132 provides an additional safety guarantee for the cryogenic regulating pipe 13. In an emergency, the operator can quickly close the fourth shut-off valve 132, cutting off the liquid connection between the cryogenic regulating pipe 13 and the cryogenic liquid tank 10, preventing liquid from continuing to flow into the cryogenic regulating pipe 13, thereby avoiding accidents that may be caused by liquid leakage or misoperation. At the same time, the presence of the fourth shut-off valve 132 also makes equipment maintenance and upkeep simpler and more efficient. When it is necessary to repair or replace the cryogenic regulating pipe 13, the operator only needs to close the fourth shut-off valve 132 to easily perform the relevant operations without shutting off the liquid supply to the entire cryogenic liquid tank 10, greatly improving the equipment's maintenance efficiency and operational stability.

[0041] During low-temperature testing, the low-temperature switching valve 113 is first closed, and the second shut-off valve 111, the fourth shut-off valve 132, the second low-temperature regulating valve 131, and the low-temperature circulation pump 112 are opened. This allows the low-temperature liquid in the low-temperature tank 10 to enter the low-temperature inlet pipe 11 under the action of the low-temperature circulation pump 112 and then flow back to the low-temperature tank 10 through the low-temperature regulating pipe 13. After a period of time, once the temperature and flow rate of the low-temperature liquid in the low-temperature inlet pipe 11 have stabilized, the low-temperature switching valve 113 is opened again to transport the low-temperature liquid in the low-temperature inlet pipe 11 to the test chamber 40. This ensures that the temperature of the low-temperature liquid in the test chamber 40 is relatively stable, thereby improving the temperature control accuracy of the low-temperature test and ensuring the accuracy of the low-temperature test results.

[0042] Furthermore, the high-temperature liquid tank 20 is also connected to a high-temperature regulating pipe 23. The end of the high-temperature regulating pipe 23 away from the high-temperature liquid tank 20 is connected to the high-temperature water inlet pipe 21. The connection between the high-temperature regulating pipe 23 and the high-temperature water inlet pipe 21 is located between the high-temperature circulating pump 212 and the high-temperature switching valve 213. A second high-temperature regulating valve 231 for regulating the internal liquid flow rate is provided on the high-temperature regulating pipe 23.

[0043] Furthermore, a fifth shut-off valve 232 is also provided on the high-temperature regulating pipe 23. The fifth shut-off valve 232 is located on the side of the second high-temperature regulating valve 231 near the high-temperature liquid tank 20.

[0044] The high-temperature regulating pipe 23, the second high-temperature regulating valve 231, and the fifth shut-off valve 232 have the same function and working principle as the low-temperature regulating pipe 13, the second low-temperature regulating valve 131, and the fourth regulating valve. When conducting high-temperature testing, the high-temperature switching valve 213 is closed first, and the third shut-off valve 211, the fifth shut-off valve 232, the second high-temperature regulating valve 231, and the high-temperature circulating pump 212 are opened. This allows the high-temperature liquid in the high-temperature liquid tank 20 to enter the high-temperature inlet pipe 21 under the action of the high-temperature circulating pump 212 and then flow back to the high-temperature liquid tank 20 through the high-temperature regulating pipe 23. After a period of time, once the temperature and flow rate of the high-temperature liquid in the high-temperature inlet pipe 21 have stabilized, the high-temperature switching valve 213 is opened again to transport the high-temperature liquid in the high-temperature inlet pipe 21 to the test chamber 40. This makes the temperature of the high-temperature liquid in the test chamber 40 more stable, thereby improving the temperature control accuracy of the high-temperature test and ensuring the accuracy of the high-temperature test results.

[0045] Furthermore, the test chamber 40 is provided with a first water inlet 41, a second water inlet 42, a first water outlet 43, and a second water outlet 44. The low-temperature water inlet pipe 11 and the high-temperature water inlet pipe 21 are respectively connected to the first water inlet 41 and the second water inlet 42. The first water outlet 43 and the second water outlet 44 are respectively connected to the first water outlet pipe 45 and the second water outlet pipe 46. The ends of the first water outlet pipe 45 and the second water outlet pipe 46 away from the test chamber 40 are both connected to the return water main pipe 31.

[0046] The first inlet 41 is directly connected to the low-temperature inlet pipe 11 and is specifically used for the input of low-temperature liquids. The second inlet 42 is directly connected to the high-temperature inlet pipe 21 and is specifically used for the input of high-temperature liquids. This design ensures that low-temperature and high-temperature liquids do not share a single inlet, thus avoiding mixing between liquids of different temperatures and ensuring the accuracy and stability of the test. The first outlet 43 and the second outlet 44 are respectively connected to the first outlet pipe 45 and the second outlet pipe 46. The ends of these two outlet pipes furthest from the test chamber 40 are both connected to the return water main pipe 31. During the test, the liquid in the test chamber 40 is discharged through the first outlet 43 and the second outlet 44, respectively. That is, during high-temperature testing, the liquid in the test chamber 40 is discharged from the second outlet 44, and during low-temperature testing, the liquid in the test chamber 40 is discharged from the first outlet 43. This ensures that the liquid in the test chamber 40 can be quickly and completely replaced at different test stages, improving test efficiency. At the same time, it also allows high-temperature liquids and low-temperature liquids to flow back to the return water main 31 through different paths after the test, avoiding pipeline thermal stress problems caused by temperature differences and extending the service life of the equipment.

[0047] Furthermore, a pressure transmitter 114 and a second temperature transmitter 115 are also provided on the low-temperature water inlet pipe 11. The pressure transmitter 114 and the first temperature transmitter 312 are sequentially arranged between the low-temperature switching valve 113 and the first water inlet 41. A connecting pipe 14 connects the low-temperature water inlet pipe 11 and the high-temperature water inlet pipe 21. The two ends of the connecting pipe 14 are respectively connected to the end of the low-temperature water inlet pipe 11 near the first water inlet 41 and the end of the high-temperature water inlet pipe 21 near the second water inlet 42.

[0048] Understandably, pressure transmitter 114 is used to monitor pressure changes in the cryogenic inlet pipe 11 in real time, ensuring pressure stability during testing and preventing test errors or equipment damage caused by abnormal pressure. The second temperature transmitter 115 is responsible for monitoring the temperature of the cryogenic inlet pipe 11, ensuring the test medium reaches the preset low-temperature conditions before entering the test chamber 40. This not only improves test accuracy but also provides operators with real-time monitoring data, allowing them to adjust test conditions as needed. Simultaneously, the cryogenic inlet pipe 11 and the high-temperature inlet pipe 21 are connected via a connecting pipe 14, enabling pressure transmitter 114 and the second temperature transmitter 115 to also detect the pressure and temperature within the high-temperature inlet pipe 21 during high-temperature testing.

[0049] Furthermore, a sixth shut-off valve 47 is provided on the end of the low-temperature water inlet pipe 11 near the first water inlet 41, the end of the high-temperature water inlet pipe 21 near the second water inlet 42, the first water outlet pipe 45, and the second water outlet pipe 46. The sixth shut-off valve 47 on the low-temperature water inlet pipe 11 and the high-temperature water inlet pipe 21 are respectively located on the side of the connecting pipe 14 near the first water inlet 41 and the side of the connecting pipe 14 near the second water inlet pipe.

[0050] By employing the above configuration, each pipeline can be independently shut off when needed for maintenance, cleaning, or replacement of the test medium. For example, when switching from a low-temperature test to a high-temperature test, the sixth shut-off valve 47 on the low-temperature inlet pipe 11 is closed to prevent the low-temperature liquid from continuing to flow into the test chamber 40, while the sixth shut-off valve 47 on the first outlet pipe 45 is opened to drain the low-temperature liquid from the test chamber 40. Similarly, when switching from a high-temperature test to a low-temperature test, the sixth shut-off valve 47 on the high-temperature inlet pipe 21 is closed to prevent the high-temperature liquid from continuing to flow into the test chamber 40, while the sixth shut-off valve 47 on the second outlet pipe 46 is opened to drain the high-temperature liquid from the test chamber 40. This flexible pipeline control not only improves the safety of the test but also allows the equipment to maintain efficient operation under various test conditions. Furthermore, the sixth shut-off valve 47 facilitates rapid fluid shut-off in emergencies, protecting the safety of the test equipment and operators.

[0051] The above is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A liquid high and low temperature alternating test device, characterized in that, The system includes a low-temperature liquid tank (10), a high-temperature liquid tank (20), a buffer liquid tank (30), and a test chamber (40). The low-temperature liquid tank (10), the high-temperature liquid tank (20), and the buffer liquid tank (30) are connected to the test chamber (40) by a low-temperature water inlet pipe (11), a high-temperature water inlet pipe (21), and a return water main pipe (31), respectively. The low-temperature liquid tank (10) and the high-temperature liquid tank (20) are also connected by a low-temperature return water pipe (12) and a high-temperature return water pipe (22), respectively. The low-temperature return water pipe (12) and the high-temperature return water pipe (22) are both connected to the return water main pipe (31). The return water main pipe (31) is equipped with a first shut-off valve (311) at one end near the buffer liquid tank (30). The low-temperature return water pipe (12) and the high-temperature return water pipe (22) are respectively equipped with a first low-temperature regulating valve (121) and a first high-temperature regulating valve (221). The return water main pipe (31) is also equipped with a first temperature transmitter (312) for detecting its internal temperature. The temperature of the liquid in the return water main pipe (31) is detected in real time by the first temperature transmitter (312), and the first high-temperature regulating valve (221), the first low-temperature regulating valve (121) and the first shut-off valve (311) are opened or closed accordingly, so that the high-temperature liquid or low-temperature liquid in the return water main pipe (31) can flow back to the high-temperature liquid tank (20) or the low-temperature liquid tank (10). The mixture of high-temperature liquid and low-temperature liquid in the return water main pipe (31) flows into the buffer liquid tank (30).

2. The liquid high and low temperature alternating test equipment according to claim 1, characterized in that, The low-temperature water inlet pipe (11) is also equipped with a second shut-off valve (111), a low-temperature circulation pump (112), and a low-temperature switching valve (113). The second shut-off valve (111) is located at one end of the low-temperature water inlet pipe (11) near the low-temperature water tank. The low-temperature switching valve (113) is located at one end of the low-temperature water inlet pipe (11) near the test chamber (40). The low-temperature circulation pump (112) is located between the second shut-off valve (111) and the low-temperature switching valve (113).

3. The liquid high and low temperature alternating test equipment according to claim 2, characterized in that, The high-temperature water inlet pipe (21) is also equipped with a third shut-off valve (211), a high-temperature circulation pump (212), and a high-temperature switching valve (213). The third shut-off valve (211) is located at one end of the high-temperature water inlet pipe (21) near the high-temperature water tank. The high-temperature switching valve (213) is located at one end of the high-temperature water inlet pipe (21) near the test chamber (40). The high-temperature circulation pump (212) is located between the third shut-off valve (211) and the high-temperature switching valve (213).

4. The liquid high and low temperature alternating test equipment according to claim 3, characterized in that, The cryogenic liquid tank (10) is also connected to a cryogenic regulating pipe (13). The end of the cryogenic regulating pipe (13) away from the cryogenic liquid tank (10) is connected to a cryogenic water inlet pipe (11). The connection between the cryogenic regulating pipe (13) and the cryogenic water inlet pipe (11) is located between the cryogenic circulating pump (112) and the cryogenic switching valve (113). A second cryogenic regulating valve (131) is provided on the cryogenic regulating pipe (13) for adjusting the flow rate of the liquid inside it.

5. The liquid high and low temperature alternating test equipment according to claim 4, characterized in that, The cryogenic regulating pipe (13) is also provided with a fourth shut-off valve (132), which is located on the side of the second cryogenic regulating valve (131) near the cryogenic liquid tank (10).

6. The liquid high and low temperature alternating test equipment according to claim 3, characterized in that, The high-temperature liquid tank (20) is also connected to a high-temperature regulating pipe (23). The end of the high-temperature regulating pipe (23) away from the high-temperature liquid tank (20) is connected to the high-temperature water inlet pipe (21). The connection between the high-temperature regulating pipe (23) and the high-temperature water inlet pipe (21) is located between the high-temperature circulating pump (212) and the high-temperature switching valve (213). A second high-temperature regulating valve (231) for regulating the flow rate of the liquid inside the high-temperature regulating pipe (23) is provided.

7. The liquid high and low temperature alternating test equipment according to claim 6, characterized in that, The high-temperature regulating pipe (23) is also equipped with a fifth shut-off valve (232), which is located on the side of the second high-temperature regulating valve (231) near the high-temperature liquid tank (20).

8. The liquid high and low temperature alternating test equipment according to claim 1, characterized in that, The test chamber (40) is provided with a first inlet (41), a second inlet (42), a first outlet (43), and a second outlet (44). The low-temperature inlet pipe (11) and the high-temperature inlet pipe (21) are respectively connected to the first inlet (41) and the second inlet (42). The first outlet (43) and the second outlet (44) are respectively connected to the first outlet pipe (45) and the second outlet pipe (46). The ends of the first outlet pipe (45) and the second outlet pipe (46) away from the test chamber (40) are both connected to the return water main pipe (31).

9. The liquid high and low temperature alternating test equipment according to claim 8, characterized in that, A pressure transmitter (114) and a second temperature transmitter (115) are also provided on the low-temperature water inlet pipe (11). The pressure transmitter (114) and the first temperature transmitter (312) are sequentially located between the low-temperature switching valve (113) and the first water inlet (41). A connecting pipe (14) connects the low-temperature water inlet pipe (11) and the high-temperature water inlet pipe (21). The two ends of the connecting pipe (14) are respectively connected to the end of the low-temperature water inlet pipe (11) near the first water inlet (41) and the end of the high-temperature water inlet pipe (21) near the second water inlet (42).

10. The liquid high and low temperature alternating test equipment according to claim 9, characterized in that, A sixth shut-off valve (47) is provided on the end of the low-temperature water inlet pipe (11) near the first water inlet (41), the end of the high-temperature water inlet pipe (21) near the second water inlet (42), the first water outlet pipe (45), and the second water outlet pipe (46). The sixth shut-off valve (47) on the low-temperature water inlet pipe (11) and the high-temperature water inlet pipe (21) are respectively located on the side of the connecting pipe (14) near the first water inlet (41) and the side of the connecting pipe (14) near the second water inlet pipe.

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