A heat exchanger pressure drop test auxiliary device

Abstract

The utility model relates to a kind of heat exchanger pressure drop test auxiliary equipment, to solve the problems such as poor flow adaptability of existing test device, low degree of automation, limited adaptation type and insufficient environmental control, equipment includes: test gas source (1), including large flow test circuit and small flow test circuit, for generating compressed gas;Fixed heat exchanger adapter tool frame (2) is communicated with the test gas source (1), and the fixed heat exchanger adapter tool frame (2) includes multiple test branches, and each test branch includes different aircraft heat exchanger test tool.Compared with prior art, the utility model can be flexibly adapted to different flow requirements, realize automatic control, compatible with multiple heat exchangers, improve test efficiency and controllability.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to an auxiliary device for testing the pressure drop of a heat exchanger. Background Technology

[0002] Chinese Patent Publication No. CN206348161U discloses a heat exchanger pressure drop testing device, belonging to the technical field of aircraft heat exchanger pressure loss testing. One end of a first ball valve is connected to a first gas tank. The first gas tank is connected to a second ball valve and a vortex flow meter. The other end of the vortex flow meter is connected to a first needle valve, a first temperature transmitter, and a proportional regulating ball valve. The other end of the first needle valve is connected to a pressure transmitter and a pressure testing connector. The other end of the proportional regulating ball valve is connected to the second gas tank. The other end of the first ball valve is connected to a filter pressure reducing valve. The other end of the filter pressure reducing valve is connected to the second needle valve. The other end of the second needle valve is connected to a pressure gauge and a pressure testing connector. The second gas tank is connected to a pressure switch, a first pneumatic butterfly valve, a fourth pneumatic butterfly valve, a third pneumatic butterfly valve, a second pneumatic butterfly valve, and a second temperature transmitter.

[0003] However, existing testing devices have many shortcomings in practical applications:

[0004] (1) Inadequate control function: It lacks an emergency stop mechanism, which cannot quickly terminate the test in case of an emergency, posing a safety hazard; and it does not have an automatic test function, which can only rely on manual operation, which not only increases labor costs, but also makes it easy to affect the test accuracy due to human operation errors. At the same time, it cannot dynamically display key test data such as pressure, temperature, and flow rate, making it inconvenient to monitor the test process in real time.

[0005] (2) Poor testing environment: There is no dedicated space for placing the test piece, making it inconvenient to install and fix the test piece; there is a lack of lighting equipment during testing, which affects the ease of operation.

[0006] (3) Single gas supply method: It can only provide a single gas supply, which cannot meet the requirements of different types of heat exchangers or different test needs for multiple gas sources, and has poor adaptability.

[0007] (4) Insufficient test accuracy: The measurement accuracy of parameters such as pressure, flow rate and temperature in the existing device is low, which cannot meet the needs of high-precision test scenarios. Especially for tests in the low pressure range (such as 0 to 3 kPa), the error is large and it is difficult to accurately reflect the actual pressure loss of the heat exchanger.

[0008] (5) Limited adaptability: There is a lack of dedicated adapters for different models of heat exchangers. When testing various types of heat exchangers, it is necessary to frequently change the connecting parts, which is cumbersome and the test results are easily affected by improper connection.

[0009] Therefore, there is an urgent need for a heat exchanger pressure drop testing system with complete functions, high testing accuracy, strong adaptability and convenient operation to solve the above-mentioned problems in the existing technology. Utility Model Content

[0010] The purpose of this utility model is to overcome the defects of the existing technology and provide an auxiliary device for testing the pressure drop of heat exchangers, so as to solve or partially solve the problems of poor flow adaptability of existing devices, difficulty in meeting the flow requirements of different heat exchangers, and limited compatibility with different types of heat exchangers.

[0011] The objective of this utility model can be achieved through the following technical solutions:

[0012] This utility model provides an auxiliary device for testing the pressure drop of a heat exchanger, comprising:

[0013] The test gas source includes a high-flow test circuit and a low-flow test circuit, used to generate compressed gas;

[0014] A fixed heat exchanger adapter fixture is connected to the test gas source. The fixed heat exchanger adapter fixture includes multiple test branches, each of which includes different aircraft heat exchanger test fixtures.

[0015] As a preferred technical solution, the test gas source includes:

[0016] Manual shut-off valve, connected to the external air supply pipe;

[0017] The first flow meter is connected to the manual shut-off valve;

[0018] The first pneumatic ball valve is connected to the first flow meter;

[0019] The second flow meter is connected in parallel across the two ends of the first pneumatic ball valve;

[0020] The first proportional control valve is connected to the first pneumatic ball valve and the second flow meter, respectively;

[0021] The second proportional control valve is connected in parallel across the two ends of the first proportional control valve;

[0022] The second pneumatic ball valve is connected to the first proportional regulating valve, the second proportional regulating valve, and the fixed heat exchanger adapter fixture, respectively.

[0023] The third pneumatic ball valve is connected to the first proportional regulating valve, the second proportional regulating valve, and the fixed heat exchanger adapter fixture, respectively.

[0024] As a preferred technical solution, in the high-flow-rate test circuit, gas enters the fixed heat exchanger transfer fixture through a manual shut-off valve, a first flow meter, a first pneumatic ball valve, a second flow meter, a first proportional regulating valve, and a second pneumatic ball valve. In the low-flow-rate test circuit, the first pneumatic ball valve is closed, and gas enters the fixed heat exchanger transfer fixture through a manual shut-off valve, a first flow meter, a second flow meter, a second proportional regulating valve, and a third pneumatic ball valve.

[0025] As a preferred technical solution, the test gas source further includes:

[0026] Temperature sensors are connected to the output terminals of the first proportional control valve and the second proportional control valve, respectively.

[0027] As a preferred technical solution, the test gas source further includes:

[0028] The pneumatic two-unit includes an air filter and a pressure reducing valve, and is connected to an external air supply line;

[0029] The first electromagnetic reversing valve is connected to the first pneumatic ball valve and the pneumatic two-piece assembly, respectively.

[0030] The second electromagnetic reversing valve is connected to the second pneumatic ball valve and the pneumatic two-piece assembly, respectively.

[0031] The third electromagnetic reversing valve is connected to the third pneumatic ball valve and the pneumatic two-piece assembly, respectively.

[0032] As a preferred technical solution, the following are also included:

[0033] The control panel is electrically connected to the first electromagnetic directional valve, the second electromagnetic directional valve, and the third electromagnetic directional valve.

[0034] As a preferred technical solution, the fixed heat exchanger adapter fixture includes:

[0035] The pneumatic main control valve is connected to the test air source;

[0036] The adapter fixture body includes multiple test branches connected to the pneumatic main control valve. Each test branch includes a test fixture switch valve and an aircraft heat exchanger test fixture.

[0037] As a preferred technical solution, the fixed heat exchanger adapter fixture further includes:

[0038] A pressure transmitter is located at the end of the aircraft heat exchanger test fixture.

[0039] As a preferred technical solution, the test gas source and the fixed heat exchanger adapter fixture are arranged in a closed test space, and a transparent observation window is provided on the side wall of the test space.

[0040] As a preferred technical solution, the following are also included:

[0041] The heat exchanger adapter is connected to the test gas source.

[0042] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0043] (1) Good flow adaptability, suitable for flow testing of various heat exchangers: In view of the technical problem that the existing test devices have poor flow adaptability and are difficult to meet the flow testing requirements of different heat exchangers, the test gas source of this utility model is set with a large flow test loop and a small flow test loop. The large flow loop achieves large flow control through the first pneumatic ball valve and the first proportional regulating valve, while the small flow loop achieves small flow control by closing the first pneumatic ball valve and using the second proportional regulating valve. The test loop can be flexibly switched according to the flow requirements of different heat exchangers, covering the flow range from low to high, improving the adaptability of the equipment to different models of heat exchangers, eliminating the need for frequent replacement of test pipelines, and improving test efficiency.

[0044] (2) Ensure the accuracy of operation: In view of the technical problems of low automation of existing test devices and easy error due to reliance on manual operation, this utility model sets up a pneumatic two-piece unit (including filter and pressure reducing valve), and the first to third electromagnetic reversing valves control the pneumatic ball valve switch. The control panel is electrically connected to the electromagnetic reversing valve to realize centralized control, realize the automated control of the test process, reduce the error of manual operation, and at the same time, the pneumatic two-piece unit ensures the stability of the air source, improves the test accuracy and operation convenience.

[0045] (3) Improve equipment versatility and testing efficiency: In view of the technical problems of limited compatibility of existing test devices with heat exchanger types and the need for frequent replacement of connecting parts, the heat exchanger pressure drop test bench of this utility model is set with multiple test branches. Each branch includes a corresponding test tooling switch valve and aircraft heat exchanger test tooling. It is also equipped with heat exchanger adapter tooling, which can be adapted to various models of aircraft heat exchangers, simplifying the test preparation process and improving the versatility and testing efficiency of the equipment. Attached Figure Description

[0046] Figure 1 This is a front view of the auxiliary equipment for testing the pressure drop of the heat exchanger in the embodiment.

[0047] Figure 2 This is a top view of the heat exchanger pressure drop testing auxiliary equipment in the embodiment;

[0048] Figure 3 This is a front view of the test gas source in the embodiment;

[0049] Figure 4 This is a rear view of the test gas source in the embodiment;

[0050] Figure 5 This is a top view of the test gas source in the embodiment;

[0051] Figure 6 This is a schematic diagram of the test gas source in the embodiment;

[0052] Figure 7 This is a front view of the fixed heat exchanger adapter fixture in the embodiment.

[0053] Among them, 1. Experimental gas source, 101. Manual shut-off valve, 102. First flow meter, 103. First pneumatic ball valve, 104. Second flow meter, 105. First proportional regulating valve, 106. Second proportional regulating valve, 107. Temperature sensor, 108. Pneumatic double unit, 109. Second pneumatic ball valve, 110. Third pneumatic ball valve, 111. First solenoid directional valve, 112. Second solenoid directional valve, 113. Third solenoid directional valve, 114. Measurement and control box, 2. Solid 201. Pneumatic main control valve for stationary heat exchanger; 202. 719235 cold end test fixture switch valve; 203. 182820 cold end test fixture switch valve; 204. 194270 / 194272 cold end test fixture switch valve; 205. 719235 cold end test fixture; 206. 182820 cold end test fixture; 207. 194270 / 194272 cold end test fixture; 3. Control panel; 4. Heat exchanger adapter fixture. Detailed Implementation

[0054] 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.

[0055] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] Regarding the aforementioned problems with the prior art, see [link to relevant documentation]. Figure 1 and Figure 2 This embodiment provides an auxiliary device for testing the pressure drop of a heat exchanger. Its main body includes an experimental gas source 1, a fixed heat exchanger adapter frame 2 connected to the experimental gas source 1, and a heat exchanger adapter 4 (i.e., other heat exchanger adapters). Preferably, it also includes a control panel 3.

[0058] See Figure 3 , Figure 4 , Figure 5 and Figure 6 This is a schematic diagram of experimental air source 1. The external dimensions of experimental air source 1 are 3500L×1000W×2100H (mm). It integrates all the components for compressed air supply and control, as well as the measurement and control box. The compressed air (pressure not exceeding 1.4MPa) from the external air supply pipe is divided into two paths: one is the control loop, and the other is the test loop.

[0059] The compressed air inlet of the test circuit is a normally closed manual shut-off valve 101, which serves as the air intake valve. After the manual shut-off valve is a first flow meter 102 with a DN80 diameter and a measurement range of 0-10t / h. The outlet of the flow meter is connected to a normally open first pneumatic ball valve 103 with a DN80 diameter. A second flow meter 104 with a DN40 diameter and a measurement range of 0-2t / h is connected in parallel between the inlet and outlet of the ball valve. After that, there are a first proportional regulating valve 105 and a second proportional regulating valve 106 with DN80 and DN40 diameters, followed by two DN100 output ports. Each output port is equipped with a normally closed second pneumatic ball valve 109 and a third pneumatic ball valve 110.

[0060] The control circuit includes a gas double unit 108 (specifically including a filter and a pressure reducing valve), a first solenoid directional valve 111, a second solenoid directional valve 112, and a third solenoid directional valve 113. The control circuit controls the opening and closing of the first pneumatic ball valve 103, the second pneumatic ball valve 106, and the third pneumatic ball valve 110.

[0061] By changing the opening and closing of the first pneumatic ball valve 103, testing can be performed in both high-flow-rate and low-flow-rate scenarios. Specifically, in a high-flow-rate scenario, the first pneumatic ball valve 103 is open, and compressed air is supplied to the heat exchanger under test through the manual shut-off valve 101, the first flow meter 102, the first pneumatic ball valve 103, the second flow meter 104 (a small amount of gas flows through), the first proportional regulating valve 105, and the second pneumatic ball valve 109. In a low-flow-rate scenario, the first pneumatic ball valve 103 is closed, and compressed air is supplied to the heat exchanger under test through the manual shut-off valve 101, the first flow meter 102, the second flow meter 104, the second proportional regulating valve 106, and the third pneumatic ball valve 109.

[0062] Preferably, a temperature transmitter 107 (range 100°C) is installed before the inlet of the second pneumatic ball valve 109 and the third pneumatic ball valve 110 to measure the temperature of the compressed air.

[0063] Preferably, it also includes a measurement and control box 114, which houses the power supply, measurement and control lines.

[0064] See Figure 7This is a schematic diagram of a fixed heat exchanger adapter fixture, which includes a pneumatic main control valve 201 for controlling the inflow of compressed gas, and three test branches. The first test branch includes 719235 cold end test fixture switch valves 202 and 205 connected in sequence. The second test branch includes 182820 cold end test fixture switch valves 203 and 206 connected in sequence. The third test branch includes 194270 / 194272 cold end test fixture switch valves 204 and 207 connected in sequence.

[0065] Preferably, it is also equipped with a movable pressure test box containing four pressure transmitters with absolute pressure transmitters having ranges of (0-7) kPa, (0-60) kPa, (0-300) kPa and (0-200) kPa, respectively. Different ranges can be selected according to the heat exchanger model to measure the inlet pressure of the heat exchanger, meeting the test accuracy requirements of different pressure tests. The absolute pressure transmitter detects the ambient atmospheric pressure in the test room.

[0066] The control console 3 may include an integrated industrial computer, a keyboard and a mouse, and is connected to devices such as the first solenoid directional valve 111, the second solenoid directional valve 112, the third solenoid directional valve 113, the temperature transmitter 107, the pressure transmitter, the first proportional regulating valve 105 and the second proportional regulating valve 106.

[0067] The heat exchanger adapter 4 can be used to connect to all heat exchanger hot end test fixtures specified in the project. A pressure test connector is reserved at an appropriate position on the fixture. During testing, the pressure is measured by connecting the pressure transmitter on the mobile pressure test box through a pressure test hose.

[0068] During testing, the heat exchanger is connected to one of the two output terminals of the test bench, namely the second pneumatic ball valve 109 and the third pneumatic ball valve 110, via a connecting fixture. Taking the connection to the second pneumatic ball valve 109 as an example, the test can be performed by opening the manual shut-off valve 101. During testing, the second pneumatic ball valve 109 is opened.

[0069] In summary, the key parameters of the auxiliary equipment for heat exchanger pressure drop testing in this embodiment are shown in Table 1:

[0070] Table 1 Key parameters of auxiliary equipment for heat exchanger pressure drop testing

[0071]

[0072] In this embodiment, all components used are commercially available products, and the main component list is shown in Table 2.

[0073] Table 2 Main Components List

[0074]

[0075] 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. An auxiliary device for testing the pressure drop of a heat exchanger, characterized in that, include: Test gas source (1), including a high-flow test circuit and a low-flow test circuit, is used to generate compressed gas; The fixed heat exchanger adapter fixture (2) is connected to the test gas source (1). The fixed heat exchanger adapter fixture (2) includes multiple test branches, each of which includes different aircraft heat exchanger test fixtures.

2. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 1, characterized in that, The test gas source (1) includes: Manual shut-off valve (101) is connected to an external air supply pipe; The first flow meter (102) is connected to the manual shut-off valve (101); The first pneumatic ball valve (103) is connected to the first flow meter (102); The second flow meter (104) is connected in parallel across the two ends of the first pneumatic ball valve (103); The first proportional control valve (105) is connected to the first pneumatic ball valve (103) and the second flow meter (104), respectively; The second proportional control valve (106) is connected in parallel to both ends of the first proportional control valve (105); The second pneumatic ball valve (109) is connected to the first proportional regulating valve (105), the second proportional regulating valve (106) and the fixed heat exchanger adapter fixture (2), respectively. The third pneumatic ball valve (110) is connected to the first proportional regulating valve (105), the second proportional regulating valve (106) and the fixed heat exchanger adapter fixture (2), respectively.

3. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 2, characterized in that, In the high-flow-rate test circuit, gas enters the fixed heat exchanger adapter fixture (2) through the manual shut-off valve (101), the first flow meter (102), the first pneumatic ball valve (103), the second flow meter (104), the first proportional regulating valve (105), and the second pneumatic ball valve (109). In the low-flow-rate test circuit, the first pneumatic ball valve (103) is closed, and gas enters the fixed heat exchanger adapter fixture (2) through the manual shut-off valve (101), the first flow meter (102), the second flow meter (104), the second proportional regulating valve (106), and the third pneumatic ball valve (110).

4. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 2, characterized in that, The test gas source (1) also includes: The temperature sensor (107) is connected to the output terminals of the first proportional control valve (105) and the second proportional control valve (106), respectively.

5. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 2, characterized in that, The test gas source (1) also includes: A pneumatic two-piece unit (108) includes an air filter and a pressure reducing valve, and is connected to an external air supply line; The first electromagnetic reversing valve (111) is connected to the first pneumatic ball valve (103) and the pneumatic double-joint (108) respectively; The second electromagnetic reversing valve (112) is connected to the second pneumatic ball valve (109) and the pneumatic double-joint (108) respectively; The third electromagnetic reversing valve (113) is connected to the third pneumatic ball valve (110) and the pneumatic double unit (108), respectively.

6. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 5, characterized in that, Also includes: The control panel (3) is electrically connected to the first electromagnetic reversing valve (111), the second electromagnetic reversing valve (112), and the third electromagnetic reversing valve (113).

7. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 1, characterized in that, The fixed heat exchanger adapter fixture (2) includes: A pneumatic main control valve (201) is connected to the test air source (1); The adapter fixture body includes multiple test branches connected to the pneumatic main control valve (201). Each test branch includes a test fixture switch valve and an aircraft heat exchanger test fixture.

8. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 7, characterized in that, The fixed heat exchanger adapter fixture also includes: A pressure transmitter is located at the end of the aircraft heat exchanger test fixture.

9. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 1, characterized in that, The test gas source (1) and the fixed heat exchanger adapter fixture (2) are set in the sealed test space, and the side wall of the test space is provided with a transparent observation window.

10. The auxiliary device for testing the pressure drop of a heat exchanger according to claim 1, characterized in that, Also includes: The heat exchanger adapter (4) is connected to the test gas source (1).

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