Low-temperature cold test heat exchange comprehensive test system

Abstract

The utility model relates to the technical field of heat exchanger testing, and particularly discloses a low-temperature cold test heat exchange comprehensive testing system which comprises a water supply system connected with a heat exchanger and forming a circulating pipeline, a medium conveying system connected with a heat exchange pipeline inlet of the heat exchanger, and a gas output tube pass connected with a heat exchange pipeline outlet of the heat exchange pipeline. The medium conveying system comprises a liquid supply pipeline, a liquid conveying pipeline connected with an outlet of the liquid supply pipeline and an inlet of the heat exchange pipeline, a conversion pipeline connected with the outlet of the liquid supply pipeline and the inlet of the heat exchange pipeline, and a liquid stop valve arranged on the liquid conveying pipeline. According to the utility model, the performance of the heat exchanger can be effectively tested in a gas-phase medium or a liquid-phase medium, and the test precision of the heat exchanger is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger testing, and more specifically, to a low-temperature cold test heat exchange comprehensive testing system. Background Art

[0002] To meet the needs of heat conversion and energy conservation and emission reduction in process flows, heat exchangers are widely used in fields such as shipbuilding, aerospace, and chemical engineering. However, with the development of industrial level, the types, structures, and materials of heat exchangers are constantly innovating, and the requirements for their heat transfer and resistance performance are also constantly increasing. The large flow rate and wide temperature range of operating conditions pose severe challenges to the testing performance of the corresponding thermal testing platforms. Simple test fixtures can no longer meet the working conditions and accuracy requirements of today's heat exchanger inspection work.

[0003] The shortcomings of simple test fixtures in various working conditions:

[0004] 1: The test range is difficult to adjust and it is difficult to meet the testing requirements of various flow rates.

[0005] 2: The test temperature of high-temperature medium cannot be stabilized, and the water temperature continues to decrease with the test time. It is impossible to obtain accurate test data without long-term testing.

[0006] 3: The test medium has limitations and can only perform performance tests on a single low-temperature medium. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a low-temperature cold test heat exchange comprehensive test system, which can effectively realize the performance test of the heat exchanger under gas phase medium or liquid phase medium;

[0008] The solution adopted by the utility model to solve the technical problem is:

[0009] A low-temperature cold test heat exchange comprehensive test system is used to test the heat exchanger, including a water supply system connected to the heat exchanger to form a circulation pipeline, a medium delivery system connected to the heat exchange pipeline inlet of the heat exchanger, and a gas output pipeline connected to the heat exchange pipeline outlet of the heat exchange pipeline;

[0010] The medium delivery system includes a liquid supply pipeline, a liquid delivery pipeline connected to the liquid supply pipeline outlet and the heat exchange pipeline inlet respectively, a conversion pipeline connected to the liquid supply pipeline outlet and the heat exchange pipeline inlet respectively, and a liquid stop valve arranged on the liquid delivery pipeline.

[0011] In some possible implementations, the water supply system includes a water tank, an output pipeline connected to the water tank and the shell-side outlet of the heat exchanger, an input pipeline connected to the water tank and the shell-side inlet of the heat exchanger, and a heater arranged on the input pipeline.

[0012] In some possible implementations, a water pump, a regulating valve 1, and a flow meter 1 are further provided on the input pipeline; the water pump is arranged on a side of the input pipeline close to the water tank, and the regulating valve 1 is arranged on a side of the water pump away from the water tank; the flow meter 1 is arranged on a side of the regulating valve 1 away from the water pump, and the heater is arranged on a side of the flow meter 1 away from the regulating valve 1.

[0013] In some possible implementations, a second flow meter is provided on the output pipeline.

[0014] In some possible implementations, a second temperature transmitter is provided at the shell-side outlet, and a first temperature transmitter is provided at the shell-side inlet.

[0015] In some possible implementations, a gas temperature transmitter, a gas pressure transmitter, a gas flow meter, and a regulating valve are sequentially provided on the gas output pipe along the gas flow direction.

[0016] In some possible implementations, a muffler is further provided on the gas output pipe, and the muffler is provided on a side of the regulating valve 3 away from the gas flow meter.

[0017] In some possible implementations, a liquid pressure transmitter and a liquid temperature transmitter are further provided on the liquid delivery pipeline; the liquid pressure transmitter and the liquid temperature transmitter are provided between the liquid stop valve and the inlet of the heat exchange pipeline.

[0018] In some possible implementations, a bypass shut-off valve, a vaporizer, and a one-way valve are sequentially provided on the conversion pipeline along the medium flow direction.

[0019] In some possible implementations, the conversion pipeline is connected to the inlet of the heat exchange pipeline via a hose, and the conversion pipeline is divided into multiple groups and is respectively connected to the liquid supply pipeline.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The utility model can test the heat exchanger by using liquid or gas as the test medium according to the test requirements through the arrangement of the conversion pipeline, the liquid supply pipeline and the liquid delivery pipeline;

[0022] In the utility model, the temperature and flow of water can be effectively adjusted by the heater, the first temperature transmitter, the second temperature transmitter, the first flow meter, the second flow meter, and the first regulating valve, thereby making the test more accurate.

[0023] The utility model can effectively adjust the flow of the medium entering the heat exchanger through the arrangement of the liquid stop valve and the bypass stop valve, thereby realizing various test requirements with small flow conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the connection relationship of the utility model;

[0025] Among them: 1-liquid supply pipeline, 2-liquid delivery pipeline, 21-liquid stop valve, 22-liquid pressure transmitter, 23-liquid temperature transmitter, 3-conversion pipeline, 31-bypass stop valve, 32-vaporizer, 33-check valve, 4-water tank, 41-input pipeline, 411-water pump, 412-control valve 1, 413-flow meter 1, 414-heater, 415-temperature transmitter 1, 42-output pipeline, 421-flow meter 2, 422-temperature transmitter 2, 5-gas output pipeline, 51-gas temperature transmitter, 52-gas pressure transmitter, 53-gas flow meter, 54-control valve 3, 55-muffler, 10-heat exchanger, 101-shell side inlet, 102-shell side outlet, 103-heat exchange pipeline. DETAILED DESCRIPTION

[0026] In this application, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; they can refer to direct connections or indirect connections through an intermediary; they can refer to internal communication between two components or interactions between two components. The terms "first," "second," and similar terms mentioned in this application do not denote any order, quantity, or importance; they are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not indicate a quantitative limitation; rather, they indicate the presence of at least one. In the implementation of this application, "and / or" describes an association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. In the description of the embodiments of this application, unless otherwise specified, "plurality" means two or more. For example, "plurality" refers to two or more positioning posts. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0027] The utility model is described in detail below.

[0028] like Figure 1 As shown:

[0029] A low-temperature cold test heat exchange comprehensive test system is used to test the heat exchanger 10, including a water supply system connected to the heat exchanger 10 and forming a circulation pipeline, a medium delivery system connected to the inlet of the heat exchange pipeline 103 of the heat exchanger 10, and a gas output pipe 5 connected to the outlet of the heat exchange pipeline 103;

[0030] The medium conveying system includes a liquid supply pipeline 1, a liquid conveying pipeline 2 respectively connected to the outlet of the liquid supply pipeline 1 and the inlet of the heat exchange pipeline 103, a conversion pipeline 3 respectively connected to the outlet of the liquid supply pipeline 1 and the inlet of the heat exchange pipeline 103, and a liquid stop valve 21 arranged on the liquid conveying pipeline 2.

[0031] The test medium is liquid nitrogen or nitrogen gas. When liquid nitrogen is used for testing, the conversion pipeline 3 is closed, the liquid shut-off valve 21 is opened, the liquid supply pipeline 1 is connected to the liquid delivery pipeline 2, and the liquid nitrogen enters the heat exchange pipeline 103 through the liquid supply pipeline 1 and the liquid delivery pipeline 2 in sequence. Heat is exchanged in the heat exchanger 10 through the water supply system that forms a circulation pipeline with the heat exchanger 10. The nitrogen gas after heat exchange is output from the gas output pipeline 5.

[0032] When nitrogen is used for testing, the liquid shut-off valve 21 is closed, the conversion line 3 is opened, and the liquid nitrogen enters the conversion line 3 through the liquid supply line 1 and is converted into a gas phase. The liquid nitrogen then enters the heat exchange line 103, and is heat-exchanged in the heat exchanger 10 through the water supply system that forms a circulation line with the heat exchanger 10. The heat-exchanged nitrogen is then output from the gas output line 5.

[0033] When the water supply system is in use, the temperature and flow of water entering the heat exchanger 10 are adjusted according to the test requirements, and the flow and temperature of the water discharged after heat exchange are monitored, as well as high temperature resistance monitoring;

[0034] The gas output pipe 5 not only realizes the discharge of the gas after heat exchange, but also tests the temperature and flow of the discharged gas and controls the pressure on the pipe side.

[0035] In some possible embodiments, in order to effectively heat water through the water supply system and supply water of different temperatures into the heat exchanger 10 so that the water can be circulated, the water supply system includes a water tank 4, an output pipe 42 connected to the water tank 4 and the shell-side outlet 102 of the heat exchanger 10, an input pipe 41 connected to the water tank 4 and the shell-side inlet 101 of the heat exchanger 10, and a heater 414 arranged on the input pipe 41.

[0036] Specifically, the shell side inlet 101 is connected to the input pipeline 41 through a hose, the shell side outlet 102 is connected to the output pipeline 42 through a hose; and the outlet of the heat exchange pipeline 103 is connected to the gas output pipeline 5 through a hose.

[0037] The water in the water tank 4 is heated to the required temperature by the heater 414 on the input pipe 41, and then enters the heat exchanger 10 to exchange heat with the medium in the heat exchange pipe 103. The water after heat exchange is discharged from the output pipe 42 to the water tank 4 for recycling.

[0038] In some possible implementations, a water pump 411, a regulating valve 412, and a flow meter 413 are further provided on the input pipeline 41; the water pump 411 is provided on a side of the input pipeline 41 close to the water tank 4, and the regulating valve 412 is provided on a side of the water pump 411 away from the water tank 4; the flow meter 413 is provided on a side of the regulating valve 412 away from the water pump 411, and the heater 414 is provided on a side of the flow meter 413 away from the regulating valve 412; a temperature transmitter 415 is provided at the shell-side inlet 101;

[0039] When supplying water, the water pump 411 is started, the water flow is regulated by the regulating valve 412, and the water is heated by the heater 414 before entering the heat exchanger 10. The temperature transmitter 415 monitors the temperature of the heated water to determine whether the heating temperature meets the requirements. If not, the water temperature of the heater 414 is adjusted until it meets the requirements.

[0040] Flow meter 1 413 is a prior art and can be a water flow meter, which is used to test the water flow after adjustment by regulating valve 1 412 to determine whether the water flow meets the requirements. If it does not meet the requirements, the regulating valve 1 412 is adjusted until the requirements are met.

[0041] In some possible implementations, a second temperature transmitter 422 is provided at the shell-side outlet 102 , and a second flow meter 421 is provided on the output pipeline 42 ;

[0042] The water after heat exchange is discharged from the shell outlet 102 and is measured by the temperature transmitter 422. The flow meter 421 tests the flow of water in the output pipe 42 and then enters the water tank 4. The flow meter 421 is a prior art and can be an electromagnetic flow meter.

[0043] In some possible implementations, a gas temperature transmitter 51, a gas pressure transmitter 52, a gas flow meter 53, and a regulating valve 54 are sequentially arranged on the gas output pipeline 5 and along the gas flow direction; a muffler 55 is also arranged on the gas output pipeline 5, and the muffler 55 is arranged on the side of the regulating valve 54 away from the gas flow meter 53.

[0044] The gas formed after heat exchange will be discharged from the heat exchange pipeline 103. It will first pass through the gas temperature transmitter 51 to monitor the gas temperature, the gas pressure transmitter 52 to monitor the gas pressure, and the gas flow meter 53 to monitor the gas flow. The pressure on the pipe side will be controlled by the regulating valve 54. The gas will be discharged after being silenced by the muffler 55.

[0045] Furthermore, the gas flow meter 53 is a gas turbine flow meter.

[0046] In some possible implementations, a liquid pressure transmitter 22 and a liquid temperature transmitter 23 are further provided on the liquid delivery pipeline 2; the liquid pressure transmitter 22 and the liquid temperature transmitter 23 are provided between the liquid stop valve 21 and the inlet of the heat exchange pipeline 103;

[0047] Furthermore, the liquid pressure transmitter 22 is provided between the liquid temperature transmitter 23 and the liquid stop valve 21;

[0048] When liquid nitrogen is used for testing, the liquid stop valve 21 is opened and the flow of liquid nitrogen into the liquid delivery pipeline 2 is controlled. The liquid pressure transmitter 22 monitors the pressure of the liquid nitrogen in the liquid delivery pipeline 2, and the liquid temperature transmitter 23 monitors the temperature of the liquid nitrogen in the liquid delivery pipeline 2.

[0049] In some possible implementations, a bypass shut-off valve 31 , a vaporizer 32 , and a one-way valve 33 are sequentially provided on the conversion pipeline 3 along the flow direction of the medium.

[0050] When nitrogen is used for testing, the liquid shut-off valve 21 is closed, the bypass shut-off valve 31 is opened and the flow of liquid entering the conversion pipeline 3 is regulated; the liquid passes through the liquid supply pipeline 1, passes through the bypass shut-off valve 31, and is pressurized and gasified by the vaporizer 32 to convert the liquid nitrogen into nitrogen gas. The liquid is then transported to the heat exchange pipeline 103 through the one-way valve 33 for heat exchange, and then enters the gas output pipeline 5 after heat exchange;

[0051] The vaporizer 32 is an air-temperature vaporizer.

[0052] In some possible implementations, the conversion pipeline 3 is connected to the inlet of the heat exchange pipeline 103 via a hose. The conversion pipelines 3 are divided into multiple groups and are respectively connected to the liquid supply pipeline 1 , and each group of conversion pipelines 3 does not interfere with each other.

[0053] Furthermore, it also includes a control module connected to the water supply system, the medium delivery system, and the gas output pipe 5 respectively; the control module is connected to the water pump 411, the flow meter 1 413, the heater 414, the temperature transmitter 1 415, the flow meter 2 421, the temperature transmitter 2 422, the gas temperature transmitter 51, the gas pressure transmitter 52, the gas flow meter 53, the liquid temperature transmitter 23, and the liquid pressure transmitter 22 respectively, and a curve table is generated by the pressure, temperature, flow and other data collected by the control module to intuitively display the test data;

[0054] The regulating valve 1 412 , regulating valve 3 54 , liquid stop valve 21 , and bypass stop valve 31 may be manual valves or electrically controlled valves; if they are all electrically controlled valves, they are connected to the control module.

[0055] The present invention is not limited to the aforementioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A low temperature cold test heat exchange comprehensive test system for testing heat exchangers, characterized in that: It includes a water supply system connected to the heat exchanger and forming a circulation pipeline, a medium delivery system connected to the heat exchange pipeline inlet of the heat exchanger, and a gas output pipeline connected to the heat exchange pipeline outlet of the heat exchange pipeline; The medium delivery system includes a liquid supply pipeline, a liquid delivery pipeline connected to the liquid supply pipeline outlet and the heat exchange pipeline inlet respectively, a conversion pipeline connected to the liquid supply pipeline outlet and the heat exchange pipeline inlet respectively, and a liquid stop valve arranged on the liquid delivery pipeline.

2. A low-temperature cooling test and heat exchange comprehensive test system according to claim 1, characterized in that: The water supply system includes a water tank, an output pipeline connected to the water tank and the shell side outlet of the heat exchanger, an input pipeline connected to the water tank and the shell side inlet of the heat exchanger, and a heater arranged on the input pipeline.

3. A low-temperature cooling test and heat exchange comprehensive test system according to claim 2, characterized in that: A water pump, a regulating valve 1, and a flow meter 1 are also provided on the input pipeline; the water pump is arranged on the side of the input pipeline close to the water tank, and the regulating valve 1 is arranged on the side of the water pump away from the water tank; the flow meter 1 is arranged on the side of the regulating valve 1 away from the water pump, and the heater is arranged on the side of the flow meter 1 away from the regulating valve 1.

4. A low-temperature cooling test and heat exchange comprehensive test system according to claim 2, characterized in that: A flow meter 2 is provided on the output pipeline.

5. A low-temperature cooling test and heat exchange comprehensive test system according to claim 2, characterized in that: A second temperature transmitter is provided at the shell side outlet, and a first temperature transmitter is provided at the shell side inlet.

6. A low-temperature cooling test and heat exchange comprehensive test system according to claim 1, characterized in that: A gas temperature transmitter, a gas pressure transmitter, a gas flow meter and a regulating valve are sequentially arranged on the gas output pipe along the gas flow direction.

7. A low-temperature cooling test and heat exchange comprehensive test system according to claim 6, characterized in that: A muffler is also provided on the gas output pipe, and the muffler is provided on a side of the regulating valve 3 away from the gas flow meter.

8. A low temperature cooling test and heat exchange comprehensive test system according to claim 1, characterized in that: A liquid pressure transmitter and a liquid temperature transmitter are also provided on the liquid delivery pipeline; the liquid pressure transmitter and the liquid temperature transmitter are provided between the liquid stop valve and the inlet of the heat exchange pipeline.

9. A low-temperature cooling test and heat exchange comprehensive test system according to claim 1, characterized in that: A bypass stop valve, a vaporizer, and a one-way valve are sequentially arranged on the conversion pipeline along the medium flow direction.

10. A low temperature cooling test and heat exchange comprehensive test system according to claim 9, characterized in that: The conversion pipeline is connected to the inlet of the heat exchange pipeline through a hose, and the conversion pipeline is divided into multiple groups and is respectively connected to the liquid supply pipeline.

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