A helicopter pressure gauge tester

Abstract

The utility model relates to a kind of helicopter pressure gauge tester, including shell, air pressure pump, trim pump and partial pressure chamber, shell inside is separately provided with air pressure pump, trim pump and partial pressure chamber, the input end of air pressure pump is connected with shell outside, the output end of air pressure pump is connected with the input end of trim pump, stop valve is set on the communication pipeline between air pressure pump and trim pump, the first output end of trim pump is connected with the input end of partial pressure chamber, the first output end of partial pressure chamber is provided with first connecting port, to-be-measured pressure sensor is electrically connected with to-be-measured pressure gauge by cable, shell is provided with single item ac 220V power socket, the second output end of partial pressure chamber is provided with second connecting port, the utility model can effectively solve the problem that pressure detection instrument is used multiple times, and improve calibration accuracy.

Description

Technical Field

[0001] This utility model relates to the field of pressure instrument calibration technology, specifically a helicopter pressure gauge tester. Background Technology

[0002] During helicopter maintenance, various pressure measuring instruments are frequently used to test and calibrate multiple pressure sensors on the helicopter. After repeated use, the pressure measuring instruments will gradually experience pressure reference deviation, resulting in errors in the test results. It is necessary to calibrate the pressure measuring instruments regularly. Therefore, a helicopter pressure gauge tester is provided. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a helicopter pressure gauge tester to address the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A helicopter pressure gauge tester includes a housing, a pneumatic pump, a fine-tuning pump, and a pressure dividing chamber. The pneumatic pump, fine-tuning pump, and pressure dividing chamber are respectively disposed inside the housing. The input end of the pneumatic pump is connected to the outside of the housing, and the output end of the pneumatic pump is connected to the input end of the fine-tuning pump. A shut-off valve is installed on the connecting pipe between the pneumatic pump and the fine-tuning pump. The first output end of the fine-tuning pump is connected to the input end of the pressure dividing chamber. The first output end of the pressure dividing chamber is provided with a first connection port for detachably connecting a pressure sensor to be tested. The force sensor is electrically connected to the pressure gauge under test via a cable. The housing is equipped with a single-phase 220V AC power socket, which is electrically connected to the single-phase 220V AC power supply and the pressure sensor and pressure gauge under test via cables. Either the pressure sensor or the pressure gauge under test is a standard component. The second output end of the pressure dividing chamber is equipped with a second connection port for detachably connecting a standard pressure gauge. The control panel of the housing is equipped with an electronic display for displaying the air pressure of the fine-tuning pump.

[0006] Furthermore, a 220V power interface is provided on the housing, and a voltage regulator module and an A / D converter are provided inside the housing. The power supply is electrically connected to the A / D converter through the voltage regulator module, and the A / D converter is electrically connected to the electronic display.

[0007] Furthermore, a pressure relief valve is provided at the second output end of the fine-tuning pump, and a pressure sensor for detecting the air pressure of the fine-tuning pump is provided on the fine-tuning pump. The pressure sensor is electrically connected to the A / D converter.

[0008] Furthermore, the control panel of the housing is equipped with a pneumatic pump booster button, a fine-tuning pump control knob, a pressure relief valve control switch, and a shut-off valve control switch.

[0009] Furthermore, a drain outlet is provided at the bottom of the pressure chamber, and a plug is provided on the drain outlet.

[0010] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0011] This invention, by incorporating an air pump, a fine-tuning pump, and a pressure dividing chamber, can precisely control and adjust the pressure, effectively solving the problem of pressure reference deviation after multiple uses of pressure measuring instruments and improving calibration accuracy.

[0012] Using the detachable first and second connection ports, the pressure sensor to be tested, the pressure gauge to be tested, and the standard pressure gauge can be flexibly connected. The pressure sensor to be tested or the pressure gauge to be tested can be calibrated separately, which facilitates the calibration and comparison testing of different components.

[0013] Equipped with a voltage regulator module, A / D converter, pressure relief valve, and various control switches, it ensures stable operation of the equipment while providing a convenient user experience.

[0014] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal connection relationship of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection relationship of the test structure of this utility model;

[0017] Figure 3 This is a top view of the shell.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Housing; 2. First connection port; 3. Second connection port; 4. Electronic display; 5. Air pressure pump boost button; 6. Fine-tuning pump control knob; 7. Pressure relief valve control switch; 8. Shut-off valve control switch. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0022] like Figure 1-3 As shown, a helicopter pressure gauge tester includes a housing 1, a pneumatic pump, a fine-tuning pump, and a pressure chamber. The pneumatic pump, fine-tuning pump, and pressure chamber are respectively arranged inside the housing 1. The input end of the pneumatic pump is connected to the outside of the housing 1, and the output end of the pneumatic pump is connected to the input end of the fine-tuning pump. A shut-off valve is installed on the connecting pipe between the pneumatic pump and the fine-tuning pump. The first output end of the fine-tuning pump is connected to the input end of the pressure chamber. The first output end of the pressure chamber is provided with a first connection port 2, which is used for detachably connecting the pressure sensor to be tested. The pressure sensor to be tested is electrically connected to the pressure gauge to be tested via a cable. The housing 1 is provided with a single-phase AC 36V power socket. The single-phase AC 36V power socket is electrically connected to the single-phase AC 36V power supply and the pressure sensor and the pressure gauge to be tested via cables. Either the pressure sensor or the pressure gauge to be tested is a standard component. The second output end of the pressure dividing chamber is provided with a second connection port 3. The second connection port 3 is used for detachable connection of a standard pressure gauge. The control panel of the housing 1 is provided with an electronic display 4 for displaying the air pressure of the fine-tuning pump.

[0023] In one embodiment, a 220V power interface is provided on the housing 1, and a voltage regulator module and an A / D converter are provided inside the housing 1. The power supply is electrically connected to the A / D converter through the voltage regulator module, and the A / D converter is electrically connected to the electronic display 4.

[0024] In one embodiment, a pressure relief valve is provided at the second output end of the fine-tuning pump, and a pressure sensor for detecting the air pressure of the fine-tuning pump is provided on the fine-tuning pump. The pressure sensor is electrically connected to the A / D converter.

[0025] In one embodiment, the control panel of the housing 1 is provided with a pneumatic pump booster button 5, a fine-tuning pump control knob 6, a pressure relief valve control switch 7, and a shut-off valve control switch 8.

[0026] In one embodiment, a drain outlet is provided at the bottom of the pressure chamber, and a plug is provided on the drain outlet.

[0027] The working process of this utility model:

[0028] 1. The pressure gauge testing procedure takes the helicopter hydraulic pressure gauge testing as an example; the testing procedures for other instruments are the same:

[0029] Connect the 220V power cord reliably;

[0030] Connect the standard pressure sensor to the first connection port 2 via an adapter;

[0031] Connect the pressure gauge to be tested to the second connection port 3;

[0032] Connect the pressure gauge and sensor detection cable to a single-phase 36V AC power supply and a power socket, and then connect the pressure sensor and pressure gauge to be tested.

[0033] Loosen the shut-off valve slightly by half a turn; the pressure relief valve is closed, and the drain hole plug is tightly closed.

[0034] Turn on the LCD display power switch and select the appropriate pressure unit (kgf / cm). 2 Or MPa.

[0035] Turn on the instrument's 220V power switch. The air pressure pump booster button 5 will light up, indicating it is in standby mode.

[0036] Turn on the instrument's 36V power switch. The pointer of the pressure gauge to be measured should point from the mechanical zero position to the electrical zero position.

[0037] Press the air pressure pump booster button 5; the system pressure should continue to rise until it reaches 10 kgf / cm³. 2 At 1 MPa, release the button and rotate the fine-tuning pump control knob 6 to ensure accurate pressure value; read the values ​​of the pressure gauge under test and the standard pressure gauge at this time, and calculate the indication error.

[0038] Increase the system pressure using the same method, and read the pressure at 20, 30, 40, 50, and 60 kgf / cm³ sequentially. 2 The readings of the pressure gauge to be measured and the standard pressure gauge are used to calculate the indication error.

[0039] Slowly open the pressure relief valve control switch 7 to release the system pressure and bring the pressure gauge reading to zero.

[0040] Turn off the power switch and, following the reverse steps, disconnect the instrument from the cables and connectors; open the drain plug and remove any accumulated water. 2. Hydraulic pressure sensor testing steps:

[0041] Connect the 220V power cord reliably;

[0042] Connect the pressure sensor to be tested to the first connection port 2 via an adapter;

[0043] Connect the standard pressure gauge to the second connection port 3; the pressure sensor slightly loosens the shut-off valve by half a turn, the pressure relief valve is closed, and the drain hole plug is tightly closed.

[0044] Turn on the LCD display power switch and select the appropriate pressure unit (kgf / cm). 2 Or MPa.

[0045] Turn on the instrument's 220V power switch. The air pressure pump booster button 5 will light up, indicating it is in standby mode.

[0046] Connect a multimeter to the output end of the hydraulic pressure sensor test cable and measure its continuity.

[0047] Press the air pump boost button 5; the system pressure should continue to rise. When the multimeter receives the on switch signal, release the air pump boost button 5. You can rotate the fine-tuning pump control knob 6 to ensure the pressure value is accurate and read the pressure value on the LCD display at this time.

[0048] Refer to error table 2 to determine the status of the pressure sensor.

[0049] Table 2 Pressure Sensor Parameter Table (Unit: kgf / cm²) 2

[0050] MCT-25A 25±1.63 Connect MCT-30A 30±1.63 Connect

[0051] Slowly open the pressure relief valve control switch 7 to release the gas in the system and reduce the pressure, so that the pressure gauge reading returns to zero.

[0052] Turn off the power switch and, following the reverse steps, disconnect the instrument from the cables and connectors; open the drain plug and clean the internal water that has accumulated when the high-pressure air condenses.

[0053] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A helicopter pressure gauge tester, characterized in that, The device includes a housing (1), a pneumatic pump, a fine-tuning pump, and a pressure dividing chamber. The pneumatic pump, fine-tuning pump, and pressure dividing chamber are respectively arranged inside the housing (1). The input end of the pneumatic pump is connected to the outside of the housing (1), and the output end of the pneumatic pump is connected to the input end of the fine-tuning pump. A shut-off valve is provided on the connecting pipe between the pneumatic pump and the fine-tuning pump. The first output end of the fine-tuning pump is connected to the input end of the pressure dividing chamber. The first output end of the pressure dividing chamber is provided with a first connection port (2), which is used for detachably connecting a pressure sensor to be measured. The housing (1) is electrically connected to the pressure gauge under test via a cable. A single-phase AC 36V power socket is provided on the housing (1). The single-phase AC 36V power socket is electrically connected to the single-phase AC 36V power supply and the pressure sensor and pressure gauge under test via a cable. Either the pressure sensor or the pressure gauge under test is a standard part. The second output end of the pressure dividing chamber is provided with a second connection port (3). The second connection port (3) is used for detachable connection of a standard pressure gauge. The control panel of the housing (1) is provided with an electronic display (4) for displaying the air pressure of the fine-tuning pump.

2. The helicopter pressure gauge tester according to claim 1, characterized in that, The housing (1) is provided with a 220V power interface. A voltage regulator module and an A / D converter are provided inside the housing (1). The power supply is electrically connected to the A / D converter through the voltage regulator module. The A / D converter is electrically connected to the electronic display (4).

3. The helicopter pressure gauge tester according to claim 1, characterized in that, The second output end of the fine-tuning pump is equipped with a pressure relief valve, and the fine-tuning pump is equipped with a pressure sensor for detecting the air pressure of the fine-tuning pump. The pressure sensor is electrically connected to the A / D converter.

4. The helicopter pressure gauge tester according to claim 1, characterized in that, The control panel of the housing (1) is equipped with a pneumatic pump boost button (5), a fine-tuning pump control knob (6), a pressure relief valve control switch (7), and a shut-off valve control switch (8).

5. A helicopter pressure gauge tester according to claim 1, characterized in that, The bottom of the pressure chamber is provided with a drain outlet, and a plug is provided on the drain outlet.

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