Spraying device for testing heat transfer performance of finned tube

Abstract

The utility model relates to a spraying device for testing the heat transfer performance of a finned tube. The spraying device comprises a testing pipeline, a spraying assembly and a circulating assembly, the finned tube is placed in the testing pipeline, the spraying assembly is installed on the side, away from the ground, of the testing pipeline, the circulating assembly comprises a water conveying pipe, a water tank and a circulating water pump, the water tank is connected with the testing pipeline through the water conveying pipe, and the circulating water pump is connected with the water tank and the spraying assembly through the water conveying pipe. Compared with the prior art, the finned tube testing device has the advantages that the finned tube is arranged in the testing pipeline, and water is sprayed into the testing pipeline through the spraying assembly, so that the finned tube of the wet air cooler and the finned tube of the dry-wet combined air cooler are subjected to simulated spraying, and then heat transfer performance testing is carried out; a sealing door is arranged on the test pipeline, so that a to-be-tested finned tube can be conveniently opened and put in; the spraying nozzles are made of polyvinyl chloride materials and are not prone to scaling; and a water collector is mounted on the test pipeline, so that test water can be conveniently recycled to the circulating assembly.

Description

Technical Field

[0001] This utility model relates to the performance testing of air coolers, and in particular to a spray device for testing the heat transfer performance of finned tubes. Background Technology

[0002] An air cooler is a device that uses ambient air as the cooling medium, flowing across the outside of finned tubes to cool or condense the high-temperature process fluid inside the tubes. The finned tubes of an air cooler consist of fins wrapped around the surface of the tubes to increase their external surface area, thereby improving heat dissipation. Testing the air-side heat transfer performance of the finned tubes is a crucial step in evaluating the performance of an air cooler. By testing the heat transfer performance of the finned tubes on the air side, key parameters such as the heat transfer coefficient and heat exchange capacity under specific operating conditions can be obtained, thus allowing for an assessment of the overall performance of the air cooler.

[0003] Currently, commonly used testing devices for the air-side heat transfer performance of finned tubes in air coolers consist of a wind speed sensor, an inlet temperature probe, and an outlet temperature probe. Patent announcement number CN206725483U discloses a single-tube heat transfer performance testing device for finned tubes. This testing device is divided into a steam system and an air system. The steam system consists of a thyristor regulator, an electric heating steam generator, a steam-water separator, a steam superheater, a steam inlet measuring section, a heat exchange testing section, a condensate metering tank, and a solenoid valve connected sequentially. The air system consists of an air cooler, an air heater, an air inlet temperature measuring section, a heat exchange testing section, an air outlet temperature measuring section, a wind speed measuring section, and an induced draft fan connected sequentially. This existing technology can only test the heat transfer performance of finned tubes in dry air coolers and cannot test the heat transfer performance of finned tubes in wet air coolers or dry-wet combined air coolers.

[0004] In summary, the technical problem that needs to be solved is how to design a device that can test the heat transfer performance of finned tubes in wet air coolers and dry-wet combined air coolers. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a spray device for testing the heat transfer performance of finned tubes.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a spray device for testing the heat transfer performance of finned tubes is provided, comprising a test pipe, a spray assembly, and a circulation assembly; the finned tube to be tested is placed inside the test pipe, the spray assembly is installed on the side of the test pipe away from the ground, and the circulation assembly comprises a water supply pipe, a water tank, and a circulating water pump, wherein the water tank and the test pipe are connected through the water supply pipe, and the circulating water pump is connected through the water supply pipe, the water tank, and the spray assembly.

[0008] As a preferred technical solution, a hygrometer is installed inside the test pipeline.

[0009] As a preferred technical solution, a sealing door is provided on the test pipeline.

[0010] As a preferred technical solution, the spray assembly includes a spray pipeline, a spray regulating valve group, and spray nozzles. The spray pipeline is connected to a circulation assembly, and the spray regulating valve group and spray nozzles are installed on the spray pipeline, with the spray nozzles facing the test pipeline.

[0011] As a preferred technical solution, the spray nozzle is a spray nozzle made of polyvinyl chloride material.

[0012] As a preferred technical solution, the circulation assembly further includes a flow regulating valve, a pressure transmitter, and a temperature transmitter installed on the water supply pipe between the circulating water pump and the spray assembly; the water tank is connected to the test pipeline.

[0013] As a preferred technical solution, the circulation component further includes a water collector and a return water pipe. The water collector is installed on the side of the test pipe near the ground and is connected to the test pipe. The water collector is connected to the water tank through the return water pipe.

[0014] As a preferred technical solution, a thermometer is installed on the return water pipe.

[0015] As a preferred technical solution, the water tank is connected to a water self-cooling component.

[0016] As a preferred technical solution, the water tank is connected to a water supply pipe, and the water supply pipe is connected to a water source.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) This utility model installs finned tubes inside a test pipe and sprays water into the test pipe through a spray assembly to simulate spraying the finned tubes of wet air coolers and dry-wet combined air coolers for heat transfer performance testing. The test water is circulated through a circulation assembly.

[0019] 2) The test pipeline of this utility model has a sealed door, which is easy to open and put the finned tube to be tested into; the spray nozzle is made of polyvinyl chloride material, which is not easy to scale; a water collector is installed on the test pipeline to facilitate the recycling of test water to the circulation component.

[0020] 3) The water tank of this utility model is connected to a water self-cooling component to cool the water in the water tank so that the water meets the spraying requirements, and the water tank is connected to a water supply pipe to replenish the test water. Attached Figure Description

[0021] Figure 1This is a schematic diagram of a spray device for testing the heat transfer performance of finned tubes according to the present invention.

[0022] Figure 2 This is a schematic diagram of the finned tube spray system of this utility model;

[0023] The numbers in the diagram are as follows:

[0024] 1. Test pipeline; 11. Hygrometer; 12. Sealing door; 21. Spray pipeline; 22. Spray regulating valve assembly; 23. Spray nozzle; 31. Water supply pipe; 32. Water tank; 33. Circulating water pump; 34. Flow regulating valve; 35. Pressure transmitter; 36. Temperature transmitter; 37. Water collector; 38. Return water pipe; 381. Thermometer; 4. Finned tube; 5. Water self-cooling assembly; 6. Water supply pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0026] like Figure 1 As shown, this utility model provides a spray device for testing the heat transfer performance of a finned tube 4, including a test pipe 1, a spray assembly, and a circulation assembly. The finned tube 4 is placed inside the test pipe 1.

[0027] The upper end of the test pipe 1 is connected to a spray assembly, and the lower end is connected to a water collector 37 of the circulation assembly. A sealing door 12 is opened on the surface of the test pipe 1. After opening the sealing door 12, the finned tube 4 to be tested can be placed into the test pipe 1, and then the sealing door 12 can be closed. One or more hygrometers 11 are installed inside the test pipe 1 to detect the humidity inside the test pipe 1.

[0028] The spray assembly includes a spray pipeline 21, a spray regulating valve assembly 22, and spray nozzles 23. The spray pipeline 21 is connected to the water supply pipe 31 of the circulation assembly. The spray regulating valve assembly 22 and spray nozzles 23 are installed on the spray pipeline 21. The spray nozzles 23 face the test pipeline 1 and spray water into the finned tubes 4 inside the test pipeline 1. The spray nozzles 23 are made of polyvinyl chloride (PVC) material, which is not prone to scaling. A hygrometer 11 is installed inside the test pipeline 1 to detect the humidity inside the test pipeline 1. One or more hygrometers 11 can be installed. Figure 1 The two hygrometers 11 shown are installed on both sides of the test pipe 1. The spray line 21, the spray regulating valve group 22, and the spray nozzles 23 are connected by flanges, which facilitates disassembly and replacement according to the different specifications of the test object.

[0029] The circulation assembly includes a water supply pipe 31, a water tank 32, a circulating water pump 33, a flow regulating valve 34, a pressure transmitter 35, a temperature transmitter 36, a water collector 37, and a return water pipe 38. The water collector 37 is installed on the side of the test pipe 1 closest to the ground and is connected to the test pipe 1. The water tank 32 and the water collector 37 are connected through the return water pipe 38. One end of the circulating water pump 33 is connected to the water tank 32 through the water supply pipe 31, and the other end is connected to the spray assembly through the water supply pipe 31. The flow regulating valve 34, the pressure transmitter 35, and the temperature transmitter 36 are installed on the water supply pipe 31 between the circulating water pump 33 and the spray assembly. The flow regulating valve 34 has an adjustment range of 3 m³ / h to 300 m³ / h to meet the test spray requirements. A thermometer 381 is installed on the return water pipe 38 to detect the temperature of the water flowing through the finned tube 4.

[0030] Water tank 32 is connected to water self-cooling component 5, which lowers the water temperature in the tank to the spraying requirements when the temperature inside the tank is too high. Water tank 32 is connected to water supply pipe 6, which is connected to a water source to replenish the water in water tank 32 and maintain the water level in water tank 32 within a certain range.

[0031] The working process of this utility model is as follows:

[0032] Open the sealing door 12 of test pipe 1, and place the finned tube 4 to be tested completely into test pipe 1 for testing. Close the sealing door 12. Circulating water pump 33 draws water, and after the flow rate is adjusted by flow regulating valve 34, the water is delivered to the spray line 21 of the top spray assembly via pressure transmitter 35 and temperature transmitter 36. The spray assembly adjusts the spray flow rate and spray pressure through spray regulating valve group 22 and distributes water to spray nozzles 23, which then spray onto the surface of the finned tube 4, forming a water film, such as... Figure 2 As shown, the water film exchanges heat with the surface of the finned tube 4 on one hand, and evaporates under the action of air on the other hand, carrying away a large amount of heat, thus enabling the heat transfer performance test of the finned tube 4. After the evaporated water vapor condenses, it returns to the surface of the finned tube 4 or returns to the water tank 32 through the water collector 37.

[0033] The measurement data from the hygrometer 11, thermometer 381, pressure transmitter 35, and temperature transmitter 36 are uploaded to the computer. The spray regulating valve group 22 and flow regulating valve 34 in the test pipeline can automatically adjust the required flow rate for the test. The pressure transmitter 35 and temperature transmitter 36 can synchronize the test data to the industrial control system in real time for calculation, thereby completing the spray simulation test on the test pipe fitting.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A spray device for testing the heat transfer performance of finned tubes, characterized in that, It includes a test pipe (1), a spray assembly and a circulation assembly; the finned tube (4) to be tested is placed inside the test pipe (1), the spray assembly is installed on the side of the test pipe (1) away from the ground, and the circulation assembly includes a water supply pipe (31), a water tank (32) and a circulating water pump (33). The water tank (32) and the test pipe (1) are connected through the water supply pipe (31), and the circulating water pump (33) is connected through the water supply pipe (31), the water tank (32) and the spray assembly. The circulation assembly also includes a flow regulating valve (34), a pressure transmitter (35), and a temperature transmitter (36) installed on the water supply pipe (31) between the circulating water pump (33) and the spray assembly; the water tank (32) is connected to the test pipeline (1).

2. The spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, The test pipe (1) is equipped with a hygrometer (11).

3. The spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, A sealing door (12) is opened on the test pipe (1).

4. The spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, The spray assembly includes a spray line (21), a spray regulating valve group (22), and a spray nozzle (23). The spray line (21) is connected to a circulation assembly. The spray regulating valve group (22) and the spray nozzle (23) are installed on the spray line (21). The spray nozzle (23) faces the test pipe (1).

5. A spray device for testing the heat transfer performance of finned tubes according to claim 4, characterized in that, The spray nozzle (23) is a spray nozzle (23) made of polyvinyl chloride.

6. A spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, The circulation assembly also includes a water collector (37) and a return pipe (38). The water collector (37) is installed on the side of the test pipe (1) near the ground and is connected to the test pipe (1). The water collector (37) is connected to the water tank (32) through the return pipe (38).

7. A spray device for testing the heat transfer performance of finned tubes according to claim 6, characterized in that, A thermometer (381) is installed on the return water pipe (38).

8. A spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, The water tank (32) is connected to the water self-cooling assembly (5).

9. A spray device for testing the heat transfer performance of finned tubes according to claim 1, characterized in that, The water tank (32) is connected to the water supply pipe (6), and the water supply pipe (6) is connected to the water source.

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