Heat exchanger detection platform based on PLC inspection and detection

Abstract

The invention relates to heat exchanger detection, and provides a heat exchanger detection platform based on PLC inspection and detection, which comprises a steam system, a heating system, a cooling system, an external circulation system and a control system, and is characterized in that the control system comprises a plurality of sensors, a plurality of electric control valves and a control unit; the sensors and the electric control valves are arranged on a first steam pipeline, a second steam pipeline, a heater, a first inner circulating pump, a hot water tank, a cooler, a second inner circulating pump, a cold water tank, a cold water pool, an outer circulating pump and a cooling tower; the control unit is electrically connected with the first internal circulating pump, the second internal circulating pump, the external circulating pump, the plurality of sensors and the plurality of electric control valves, and the control unit is used for controlling each component according to data detected by the sensors so as to detect functional parameters of the test piece. The detection platform can realize heat exchanger performance tests under different media and different flow rates, summarizes heat transfer and flow resistance criterion equations of the heat exchanger, and provides important support for subsequent product design and model selection.

Description

Technical Field

[0001] The present invention relates to the field of heat exchanger detection, and in particular to a heat exchanger detection platform based on PLC inspection and detection. Background Art

[0002] Heat exchangers, also known as heat exchangers or heat exchange equipment, are widely used in heating, refrigeration, petrochemical, metallurgy, and pharmaceutical industries. As essential equipment for heat transfer between cold and hot media, the heat exchange efficiency, heat transfer capacity, and flow resistance performance of heat exchangers have become important indicators for detecting and evaluating the energy efficiency of heat exchangers.

[0003] The current heat exchanger testing platform based on PLC inspection and testing can only simply detect the parameters of the test piece, and cannot realize the performance test of the heat exchanger under different media and different flow rates. At the same time, it cannot summarize the heat transfer and flow resistance criterion equations of the heat exchanger, and it is difficult to support the design and selection of the heat exchanger. Summary of the Invention

[0004] The present invention provides a heat exchanger detection platform based on PLC inspection and detection, which is used to solve the problem that the heat exchanger detection platform based on PLC inspection and detection in the prior art can only simply detect the parameters of the test piece, cannot realize the heat exchanger performance test under different media and different flow rates, and cannot summarize the heat transfer and flow resistance criterion equations of the heat exchanger, making it difficult to support the design and selection of the heat exchanger.

[0005] The present invention provides a heat exchanger testing platform based on PLC inspection and detection, which is used to detect the functional parameters of a test piece having a first heat exchange channel and a second heat exchange channel, including: a steam system, a heating system, a cooling system, an external circulation system and a control system;

[0006] The steam system includes a first steam pipeline and a second steam pipeline; the heating system includes a heater, a first internal circulation pump and a hot water tank; the cooling system includes a cooler, a second internal circulation pump and a cold water tank; the external circulation system includes a cold water tank, an external circulation pump and a cooling tower;

[0007] The first steam pipeline is connected to the first heat exchange channel, the second steam pipeline is connected to the heater, the first heat exchange channel, the heater, the first internal circulation pump and the hot water tank are connected end to end in sequence, the second heat exchange channel, the cooler, the second internal circulation pump and the cold water tank are connected end to end in sequence, and the cold water tank, the external circulation pump, the cold water tank and the cooling tower are connected end to end in sequence;

[0008] The control system includes multiple sensors, multiple electric-controlled valves and a control unit, and each of the sensors and each of the electric-controlled valves are arranged in the first steam pipeline, the second steam pipeline, the heater, the first internal circulation pump, the hot water tank, the cooler, the second internal circulation pump, the cold water tank, the cold water pool, the external circulation pump and the cooling tower; the control unit is electrically connected to the first internal circulation pump, the second internal circulation pump, the external circulation pump, the multiple sensors and the multiple electric-controlled valves, and the control unit is used to control the first internal circulation pump, the second internal circulation pump, the external circulation pump and the multiple electric-controlled valves according to the data detected by the sensors to detect the functional parameters of the test piece.

[0009] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the heater is provided with a third heat exchange channel and a fourth heat exchange channel;

[0010] Both ends of the third heat exchange channel are connected to the first steam pipeline and the hot water tank respectively, and both ends of the fourth heat exchange channel are connected to the first heat exchange channel and the first internal circulation pump respectively.

[0011] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, there are multiple heaters, and the third heat exchange channels of multiple heaters are connected in parallel between the first steam pipeline and the hot water tank, and the fourth heat exchange channels of multiple heaters are connected in parallel between the first heat exchange channel and the first internal circulation pump.

[0012] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, a fifth heat exchange channel and a sixth heat exchange channel are provided in the cooler;

[0013] Both ends of the fifth heat exchange channel are connected to the second heat exchange channel and the second internal circulation pump respectively, and both ends of the sixth heat exchange channel are connected to the cooling tower and the external circulation pump respectively.

[0014] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the cooler is provided with multiple, the fifth heat exchange channels of multiple coolers are connected in parallel between the second heat exchange channel and the second internal circulation pump, and the sixth heat exchange channels of multiple coolers are connected in parallel between the cooling tower and the external circulation pump.

[0015] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the heating system includes: multiple heating pipelines, each heating pipeline has a different pipe diameter, each heating pipeline is provided with the first internal circulation pump, and both ends of the heating pipeline are connected to the hot water tank and the heater.

[0016] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the cooling system includes: multiple cooling pipelines, each cooling pipeline has a different pipe diameter, each cooling pipeline is provided with the second internal circulation pump, and both ends of the cooling pipeline are connected to the cold water tank and the cooler.

[0017] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the sensor is one of a pressure transmitter, a temperature transmitter or an electromagnetic flowmeter.

[0018] According to the present invention, a heat exchanger detection platform based on PLC inspection and detection is provided, and the heat exchanger detection platform based on PLC inspection and detection also includes: a testing system, the testing system is used to set the test piece, and the testing system includes a steady-state thermal conductivity testing device, a liquid thermal conductivity measuring device, a forced convection heat release system measuring device, a steam condensation heat transfer, a heat supply system measuring device, a forward and reverse heat flow temperature difference experimental device, a heat exchanger comprehensive testing device, a comprehensive heat transfer performance testing device, a saturated steam PT relationship testing instrument, a steady-state flat plate method for determining the thermal conductivity of insulating materials test bench, a water boiling heat release test bench in a large container, a thermal conductivity characteristics test bench for an extended body, a medium-temperature normal emissivity measuring instrument, and a forced convection single-tube external heat release coefficient testing device.

[0019] According to a heat exchanger detection platform based on PLC inspection and detection provided by the present invention, the control unit is a PLC controller.

[0020] The PLC-based heat exchanger testing platform provided by the present invention comprises a steam system, a heating system, a cooling system, an external circulation system, and a control system. The control unit is electrically connected to a first internal circulation pump, a second internal circulation pump, an external circulation pump, multiple sensors, and multiple electrically controlled valves. The control unit is configured to control the first internal circulation pump, the second internal circulation pump, the external circulation pump, and the multiple electrically controlled valves based on data detected by the sensors to test the functional parameters of the test piece. This platform can perform heat exchanger performance tests under different media and flow rates, summarize heat transfer and flow resistance criterion equations for heat exchangers, and provide important support for subsequent product design and selection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1Schematic diagram of a heat exchanger detection platform based on PLC inspection and detection provided by the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the cooling system and external circulation system;

[0024] Figure 3 yes Figure 1 Schematic diagram of the steam system and heating system.

[0025] Reference numerals:

[0026] 1. Specimen; 11. First heat exchange channel; 12. Second heat exchange channel;

[0027] 2. Steam system; 21. First steam pipeline; 22. Second steam pipeline;

[0028] 3. Heating system; 31. Heater; 32. First internal circulation pump; 33. Hot water tank;

[0029] 34. Heating pipeline;

[0030] 4. Cooling system; 41. Cooler; 42. Second internal circulation pump; 43. Cold water tank;

[0031] 44. Cooling pipeline;

[0032] 5. External circulation system; 51. Cold water tank; 52. External circulation pump; 53. Cooling tower. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The following combination Figure 1-Figure 3 The present invention describes a heat exchanger detection platform based on PLC inspection and detection.

[0037] In this embodiment, a PLC-based heat exchanger testing platform is used to test the functional parameters of a test piece 1 having a first heat exchange channel 11 and a second heat exchange channel 12. The PLC-based heat exchanger testing platform includes a steam system 2, a heating system 3, a cooling system 4, an external circulation system 5, and a control system.

[0038] Among them, the steam system 2 includes a first steam pipeline 21 and a second steam pipeline 22; the heating system 3 includes a heater 31, a first internal circulation pump 32 and a hot water tank 33; the cooling system 4 includes a cooler 41, a second internal circulation pump 42 and a cold water tank 43; the external circulation system 5 includes a cold water tank 51, an external circulation pump 52 and a cooling tower 53; the first steam pipeline 21 is connected to the first heat exchange channel 11, the second steam pipeline 22 is connected to the heater 31, the first heat exchange channel 11, the heater 31, the first internal circulation pump 32 and the hot water tank 33 are connected end to end in sequence, the second heat exchange channel 12, the cooler 41, the second internal circulation pump 42 and the cold water tank 43 are connected end to end in sequence, the cold water tank 51, the external circulation pump 52, the cold water tank 4 3 and the cooling tower 53 are connected end to end in sequence; the control system includes multiple sensors, multiple electric-controlled valves and a control unit, each sensor and each electric-controlled valve is arranged in the first steam pipeline 21, the second steam pipeline 22, the heater 31, the first internal circulation pump 32, the hot water tank 33, the cooler 41, the second internal circulation pump 42, the cold water tank 43, the cold water tank 51, the external circulation pump 52 and the cooling tower 53; the control unit is electrically connected to the first internal circulation pump 32, the second internal circulation pump 42, the external circulation pump 52, the multiple sensors and the multiple electric-controlled valves, and the control unit is used to control the first internal circulation pump 32, the second internal circulation pump 42, the external circulation pump 52 and the multiple electric-controlled valves according to the data detected by the sensors to detect the functional parameters of the test piece 1.

[0039] Specifically, the multiple sensors are one of a liquid level meter, a pressure transmitter, a temperature transmitter or an electromagnetic flow meter.

[0040] For example, in this embodiment, electromagnetic flowmeters are installed on the first internal circulation pump 32, the second internal circulation pump 42, and the external circulation pump 52, while electromagnetic flowmeters and temperature transmitters are installed on the first steam pipeline 21 and the second steam pipeline 22. Electromagnetic flowmeters and temperature transmitters are also installed at the inlet and outlet locations of the heater 31, the cooler 41, and the cooling tower 53. Liquid level gauges are installed in the hot water tank 33, the cold water tank 43, and the cold water tank 51. Furthermore, electromagnetic flowmeters and temperature transmitters are also installed at the corresponding inlet and outlet locations of the first heat exchange channel 11 and the second heat exchange channel 12 of the test piece 1. Furthermore, electrically controlled valves can be installed between the first steam pipeline 21, the second steam pipeline 22, the heater 31, the first internal circulation pump 32, the hot water tank 33, the cooler 41, the second internal circulation pump 42, the cold water tank 43, the cold water tank 51, the external circulation pump 52, and the cooling tower 53 to select whether to open or close the corresponding pipeline.

[0041] When it is necessary to directly use steam for heat exchange in the test piece 1, the control unit opens the electrically controlled valve on the first steam pipeline 21 and closes the electrically controlled valve on the second steam pipeline 22. The first steam pipeline 21 is connected to the first heat exchange channel 11, and steam can directly enter the first heat exchange channel 11 of the test piece 1. At the same time, the control unit controls the second internal circulation pump 42 to start, and the second internal circulation pump 42 drives the cold water in the cold water tank 43 to enter the second heat exchange channel 12 through the cooler 41. In order to reduce the temperature of the cold water entering the second heat exchange channel 12, the external circulation pump 52 can also be turned on. The external circulation pump 52 drives the cold water in the cold water tank 51 to enter the cooler 41, and after the heat exchange is completed, it is cooled by the cooling tower 53. By introducing steam into the first heat exchange channel 11 and cold water into the second heat exchange channel 12, and then using sensors at corresponding positions, the functional parameters of the test piece 1 can be detected.

[0042] When hot water is needed for heat exchange in test piece 1, the control unit opens the electrically controlled valve on the second steam line 22 and closes the electrically controlled valve on the first steam line 21. The second steam line 22 is connected to the heater 31. The control unit activates the first internal circulation pump 32, which drives hot water from the hot water tank 33 into the heater 31 for heat exchange with steam. The heated hot water then enters the first heat exchange channel 11 of test piece 1. Simultaneously, the control unit activates the second internal circulation pump 42, which drives cold water from the cold water tank 43 through the cooler 41 into the second heat exchange channel 12. To lower the temperature of the cold water entering the second heat exchange channel 12, the control unit activates the external circulation pump 52, which drives cold water from the cold water tank 51 into the cooler 41. After heat exchange, the water is cooled by the cooling tower 53. By introducing steam into the first heat exchange channel 11 and cold water into the second heat exchange channel 12, and using sensors located in corresponding positions, the functional parameters of test piece 1 can be tested.

[0043] It should be noted that, since the control system includes multiple sensors, multiple electric control valves and a control unit, each sensor and each electric control valve is arranged in the first steam pipeline 21, the second steam pipeline 22, the heater 31, the first internal circulation pump 32, the hot water tank 33, the cooler 41, the second internal circulation pump 42, the cold water tank 43, the cold water pool 51, the external circulation pump 52 and the cooling tower 53; the control unit is electrically connected to the first internal circulation pump 32, the second internal circulation pump 42, the external circulation pump 52, the multiple sensors and the multiple electric control valves. During the actual test process, according to the data detected by the sensors, it is possible to adjust not only the opening and closing of the electric control valves but also the opening degree of the electric control valves according to the test needs, which can effectively achieve precise control of the test.

[0044] The PLC-based heat exchanger testing platform provided by the present invention utilizes a steam system, a heating system, a cooling system, an external circulation system, and a control system. The control unit is electrically connected to a first internal circulation pump, a second internal circulation pump, an external circulation pump, multiple sensors, and multiple electrically controlled valves. The control unit is configured to control the first internal circulation pump, the second internal circulation pump, the external circulation pump, and the multiple electrically controlled valves based on data detected by the sensors to test the functional parameters of the test piece. This platform can perform heat exchanger performance tests under different media and flow rates, summarize heat exchanger heat transfer and flow resistance criterion equations, and provide important support for subsequent product design and selection.

[0045] In one embodiment, Figures 1 to 3 As shown, heater 31 is provided with a third heat exchange channel and a fourth heat exchange channel. The ends of the third heat exchange channel are connected to the first steam pipeline and the hot water tank 33, respectively. The ends of the fourth heat exchange channel are connected to the first heat exchange channel 11 and the first internal circulation pump 32, respectively. In other words, the third heat exchange channel is used to pass steam, while the fourth heat exchange channel is used to pass hot water from the hot water tank 33.

[0046] During operation, steam enters the third heat exchange channel. The control unit activates the first internal circulation pump 32, which drives hot water from the hot water tank 33 into the fourth heat exchange channel of the heater 31 to exchange heat with the steam. The heated hot water then enters the first heat exchange channel 11 of the specimen 1. The steam, after condensation, enters the hot water tank 33.

[0047] In this embodiment, multiple heaters 31 are provided, and the third heat exchange channels of multiple heaters 31 are connected in parallel between the first steam pipeline 21 and the hot water tank 33, and the fourth heat exchange channels of multiple heaters 31 are connected in parallel between the first heat exchange channel 11 and the first internal circulation pump 32.

[0048] When a single heater 31 cannot meet the heat demand or the heat supply needs to be adjusted, the controller can control the opening of the electric control valve at the corresponding position to increase the number of heaters 31 incorporated, so that multiple heaters 31 can be used for heat exchange at the same time.

[0049] In another embodiment, Figures 1 to 3 As shown, the cooler 41 is provided with a fifth heat exchange channel and a sixth heat exchange channel; the two ends of the fifth heat exchange channel are respectively connected to the second heat exchange channel 12 and the second internal circulation pump 42, and the two ends of the sixth heat exchange channel are respectively connected to the cooling tower 53 and the external circulation pump 52.

[0050] During operation, the external circulation pump 52 drives the cold water in the cold water pool 51 into the sixth heat exchange channel of the cooler 41. The second internal circulation pump 42 drives the cold water in the cold water tank 43 into the fifth heat exchange channel of the cooler 41. At this time, the cold water in the cold water pool 51 can cool the water in the cold water tank 43. After cooling, the water in the cold water tank 43 enters the second heat exchange channel 12. After heat exchange, the cold water in the cold water pool 51 enters the cooling tower 53 for heat dissipation before returning to the cold water pool 51.

[0051] In this embodiment, multiple coolers 41 are provided, and the fifth heat exchange channels of multiple coolers 41 are connected in parallel between the second heat exchange channel 12 and the second internal circulation pump 42, and the sixth heat exchange channels of multiple coolers 41 are connected in parallel between the cooling tower 53 and the external circulation pump 52.

[0052] When a single cooler 41 cannot meet the cooling demand, or when the cooling supply needs to be adjusted, the controller can be used to control the opening of the electric control valve at the corresponding position to increase the number of coolers 41 incorporated, so that multiple coolers 41 can be used for cooling at the same time.

[0053] Correspondingly, there are multiple cooling towers 53 and corresponding external circulation pumps 52, and each cooling tower 53 and external circulation pump 52 corresponds to a cooler 41, so that a group of cooling towers 53 and external circulation pumps 52 can be used to cool a cooler 41, so that multiple coolers 41 of the entire equipment can supply cold air at the same time.

[0054] like Figures 1 to 3 As shown, the heating system 3 includes: multiple heating pipelines 34, each heating pipeline 34 has a different diameter, each heating pipeline 34 is provided with a first internal circulation pump 32, and both ends of the heating pipeline 34 are connected to the hot water tank 33 and the heater 31.

[0055] In this embodiment, there are two heating pipes 34, and the two heating pipes 34 are arranged according to the upper limit of 100m. 3 / h、200m 3 / h is controlled in two gears. The user can choose to open the electric control valves on the two heating pipes 34 to control the amount of hot water flowing from the hot water tank 33 to the heater 31.

[0056] like Figures 1 to 3 As shown, the cooling system 4 includes: multiple cooling pipes 44, each cooling pipe 44 has a different pipe diameter, each cooling pipe 44 is provided with a second internal circulation pump 42, and both ends of the cooling pipe 44 are connected to the cold water tank 43 and the cooler 41.

[0057] In this embodiment, there are two cooling pipes 44, and the two cooling pipes 44 are provided with an upper limit of 200m. 3 / h、400m 3 / h is controlled in two gears. The user can choose to open the electric control valves on the two cooling pipes 44 to control the amount of water flowing from the cold water tank 43 to the cooler 41.

[0058] The steam system 2 uses primary-side saturated steam. The first steam pipeline 21 and the second steam pipeline 22 on the steam system 2 are provided with electrically controlled valves with adjustable openings, which are controlled in three gears with upper limits of 4t / h, 8t / h, and 12t / h.

[0059] The pipeline in the external circulation system 4 is also provided with an electrically controlled valve with adjustable opening, and the power of the external circulation pump 52 can also be adjusted, with two gears of control according to the upper limit of 200m3 / h and 400m3 / h.

[0060] Based on the above embodiments, in one embodiment, Figures 1 to 3 As shown, the PLC-based heat exchanger testing platform also includes: a test system for setting up test piece 1. The test system includes a steady-state thermal conductivity test device, a liquid thermal conductivity measurement device, a forced convection heat release system measurement device, a steam condensation heat transfer and heat supply system measurement device, a forward and reverse heat flow temperature difference experimental device, a comprehensive heat exchanger test device, a comprehensive heat transfer performance test device, a saturated steam PT relationship tester, a steady-state flat plate method for measuring the thermal conductivity of insulation materials test bench, a large container water boiling heat release test bench, an extended body thermal conductivity test bench, a medium-temperature normal emissivity measurement instrument, a forced convection single-tube external heat release coefficient test device, and other equipment. One or more of these devices can be selected for testing as needed.

[0061] Based on the above embodiments, in one embodiment, Figures 1 to 3 As shown, the control unit is a programmable logic controller (PLC).

[0062] Specifically, the control system is divided into field instruments, actuators, control cabinets and host computers.

[0063] Field instruments (sensors) primarily include pressure transmitters, temperature transmitters, and electromagnetic flowmeters. Actuators primarily include electric control valves, frequency converters, and water pumps. Control cabinets primarily include the hot-side circulation pump control cabinet, the cold-side circulation pump control cabinet, the external circulation pump control cabinet, the air-cooling tower fan control cabinet, the feed water pump control cabinet, and the PLC control cabinet. The host computer includes an industrial computer, ForceControl V7.2 configuration software, and an access database.

[0064] The first internal circulation pump 32, the second internal circulation pump 42, the external circulation pump 52 and other water pumps and air-cooling tower fans are equipped with local start-stop and remote start-stop functions. In the central control room, the operator can send start-stop commands to the PLC control cabinet through the host computer to start and stop the corresponding water pumps and fans.

[0065] The PLC controller adopts PID control strategy to intelligently adjust the opening of the steam side electric valve to achieve a hot side inlet temperature of 60±1℃, meeting the test temperature requirements. At the same time, the PID control strategy is used to intelligently adjust the frequency of the external circulation pump 52, and through flow control, ensure that the cold side inlet is 30±1℃.

[0066] The PLC controller adopts PID control strategy to intelligently adjust the opening of the electric valves in each pipeline to achieve variable flow control of each pipeline with fast speed response and high control accuracy.

[0067] The PLC control system is responsible for collecting analog signals such as pressure, temperature, and flow, and can also perform instrument accuracy correction to improve data collection precision and accuracy.

[0068] The control system automatically calculates important indicators such as the resistance drop of the heat exchanger on the hot and cold sides, the primary heat release, secondary heat absorption, thermal balance error, the Reynolds number of the fluid at different flow rates on the hot and cold sides, and the heat transfer coefficient by collecting signals such as pressure, temperature, and flow. The computing power can reach 500 times per second. At the same time, to ensure data stability, it can calculate the average value by time period and automatically filter avalanche points or sudden change data points.

[0069] In addition, the host computer can collect and save raw data and processed data on a scheduled or on-demand basis, and supports the export of files in PDF and EXCEL formats, which facilitates subsequent data processing to summarize the heat transfer and flow resistance standard equations of the heat exchanger, providing support for product optimization, design, and selection.

[0070] The above-described embodiments are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art may understand and implement the present embodiment without inventive effort.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A heat exchanger detection platform based on PLC inspection and detection, characterized in that: Used to detect functional parameters of a test piece having a first heat exchange channel and a second heat exchange channel, including: a steam system, a heating system, a cooling system, an external circulation system and a control system; The steam system includes a first steam pipeline and a second steam pipeline; the heating system includes a heater, a first internal circulation pump and a hot water tank; the cooling system includes a cooler, a second internal circulation pump and a cold water tank; the external circulation system includes a cold water tank, an external circulation pump and a cooling tower; The first steam pipeline is connected to the first heat exchange channel, the second steam pipeline is connected to the heater, the first heat exchange channel, the heater, the first internal circulation pump and the hot water tank are connected end to end in sequence, the second heat exchange channel, the cooler, the second internal circulation pump and the cold water tank are connected end to end in sequence, and the cold water tank, the external circulation pump, the cold water tank and the cooling tower are connected end to end in sequence; The control system includes multiple sensors, multiple electric-controlled valves and a control unit, and each of the sensors and each of the electric-controlled valves are arranged in the first steam pipeline, the second steam pipeline, the heater, the first internal circulation pump, the hot water tank, the cooler, the second internal circulation pump, the cold water tank, the cold water pool, the external circulation pump and the cooling tower; the control unit is electrically connected to the first internal circulation pump, the second internal circulation pump, the external circulation pump, the multiple sensors and the multiple electric-controlled valves, and the control unit is used to control the first internal circulation pump, the second internal circulation pump, the external circulation pump and the multiple electric-controlled valves according to the data detected by the sensors to detect the functional parameters of the test piece.

2. The heat exchanger detection platform based on PLC inspection and detection according to claim 1 is characterized in that: The heater is provided with a third heat exchange channel and a fourth heat exchange channel; Both ends of the third heat exchange channel are connected to the first steam pipeline and the hot water tank respectively, and both ends of the fourth heat exchange channel are connected to the first heat exchange channel and the first internal circulation pump respectively.

3. The heat exchanger detection platform based on PLC inspection and detection according to claim 2 is characterized in that: There are multiple heaters, and the third heat exchange channels of multiple heaters are connected in parallel between the first steam pipeline and the hot water tank, and the fourth heat exchange channels of multiple heaters are connected in parallel between the first heat exchange channel and the first internal circulation pump.

4. The heat exchanger detection platform based on PLC inspection and detection according to claim 1 is characterized in that: The cooler is provided with a fifth heat exchange channel and a sixth heat exchange channel; Both ends of the fifth heat exchange channel are connected to the second heat exchange channel and the second internal circulation pump respectively, and both ends of the sixth heat exchange channel are connected to the cooling tower and the external circulation pump respectively.

5. The heat exchanger detection platform based on PLC inspection and detection according to claim 4 is characterized in that: There are multiple coolers, and the fifth heat exchange channels of multiple coolers are connected in parallel between the second heat exchange channel and the second internal circulation pump, and the sixth heat exchange channels of multiple coolers are connected in parallel between the cooling tower and the external circulation pump.

6. The heat exchanger detection platform based on PLC inspection and detection according to claim 1 is characterized in that: The heating system includes: a plurality of heating pipelines, each of the heating pipelines has a different diameter, each of the heating pipelines is provided with the first internal circulation pump, and both ends of the heating pipelines are connected to the hot water tank and the heater.

7. The heat exchanger detection platform based on PLC inspection and detection according to claim 1 is characterized in that: The cooling system includes: a plurality of cooling pipelines, each of the cooling pipelines has a different diameter, each of the cooling pipelines is provided with the second internal circulation pump, and both ends of the cooling pipelines are connected to the cold water tank and the cooler.

8. The heat exchanger detection platform based on PLC inspection and detection according to claim 1 is characterized in that: The sensor is a pressure transmitter, a temperature transmitter or an electromagnetic flowmeter.

9. The heat exchanger detection platform based on PLC inspection and detection according to any one of claims 1 to 8, characterized in that: The heat exchanger detection platform based on PLC inspection and detection also includes: a test system, which is used to set the test piece, and the test system includes a steady-state thermal conductivity test device, a liquid thermal conductivity coefficient measuring device, a forced convection heat release system measuring device, a steam condensation heat transfer, a heat supply system measuring device, a forward and reverse heat transfer temperature difference experimental device, a heat exchanger comprehensive test device, a comprehensive heat transfer performance test device, a saturated steam PT relationship tester, a steady-state flat plate method for measuring the thermal conductivity coefficient of insulation materials test bench, a water boiling heat release test bench in a large container, a thermal conductivity characteristics test bench for an extended body, a medium-temperature normal emissivity measuring instrument, and a forced convection single-tube external heat release coefficient test device.

10. The heat exchanger detection platform based on PLC inspection and detection according to any one of claims 1 to 8, characterized in that: The control unit is a PLC controller.

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