Reverse oil leakage test device for pressure refueling control valve

Abstract

The utility model belongs to the technical field of aeronautical manufacturing, and discloses a reverse oil leakage test device for a pressure refueling control valve, which comprises a sealing cylinder assembly, an air nozzle, an oil nozzle, a ball valve connecting nozzle, an oil leakage hole, an oil discharge pipe, a ball valve, a liquid level meter, a placement frame, an oil storage box and a metering container, firstly, the pressure refueling control valve is installed in the sealing cylinder through a fastener, then the cylinder cover is installed on the cylinder body, and the ball valve at the bottom of the sealing cylinder is closed; the air tap and the plug cap of the oil nozzle are unscrewed, oil for testing is injected through the oil nozzle, air in the sealing cylinder can be discharged through the air tap, and oil injection is stopped when the liquid level in the sealing cylinder reaches the specified height through observation of the liquid level meter; after oil injection is finished, the plug cap of the oil nozzle is reset, and whether oil leaks out of the oil leakage hole or not is observed in a standing mode; the pressure refueling control valve leakage detection device realizes detection of oil leakage and oil leakage quantity of the pressure refueling control valve under reverse pressure, and is simple in structure, high in reliability and easy to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of aviation manufacturing technology, process equipment and special test equipment, and relates to a reverse oil leakage test device for a pressure refueling control valve. Background Art

[0002] The pressure refueling control valve is a critical control node in an aircraft's fuel circuit. Its function is to control the flow of fuel through the various fuel lines during pressure refueling, preventing spills. Under certain operating conditions, a slight negative pressure can develop in the fuel circuit, pushing against the pressure refueling control valve float, affecting its seal and causing oil leakage in the annular pipeline. Previously, there were no testing requirements for this, and existing technology lacks methods and devices capable of detecting the presence and amount of oil leakage from the pressure refueling control valve under reverse pressure. Utility Model Content

[0003] 1. Technical problems solved

[0004] The utility model provides an oil leakage test device and method for a pressure refueling control valve under reverse pressure, which has a simple structure, high reliability and is easy to operate, and can realize the test of reverse oil leakage of the pressure refueling control valve and the detection of oil leakage amount.

[0005] 2. Technical solution

[0006] like Figure 1 A pressure refueling control valve reverse oil leakage test device is provided, comprising a sealing cylinder assembly 1, an air nozzle 2, an oil nozzle 3, a ball valve nozzle 4, an oil leakage hole 5, an oil drain pipe 6, a ball valve 7, a liquid level gauge 8, a placement rack 9, an oil storage box 10, and a metering container 11; wherein the sealing cylinder assembly comprises a cylinder body 1a, a cylinder head 1b, and a mounting plate 1c.

[0007] The sealed cylinder assembly 1 comprises a cylinder body 1a, a cylinder head 1b, and a mounting plate 1c. The cylinder head 1b is attached to one side of the cylinder body 1a and secured with fasteners and a sealing ring. The mounting plate 1c is attached to the other side of the cylinder body 1a with fasteners and a sealing ring. The cylinder head 1b is provided with an air nozzle 2 and an oil nozzle 3, each with corresponding sealing caps. The mounting plate 1c is provided with a ball valve nozzle 4 and an oil leak hole 5. A liquid level gauge 8 is provided on the sidewall of the cylinder body 1a.

[0008] Furthermore, a handle is provided on the cylinder cover 1b for easy movement and transportation.

[0009] Furthermore, an annular groove is provided on the mounting plate 1c, and an annular boss is provided on the side where the cylinder body 1a is connected to the mounting plate 1c. The annular groove and the annular boss match each other in appearance, and a sealing ring is provided between the annular groove and the annular boss to enhance the sealing effect.

[0010] Further, the liquid level gauge 8 is provided with a scale line, facilitating observation of whether the working liquid level is reached.

[0011] Further, the device further comprises a ball valve 7, which is arranged on the mounting plate 1c and is in communication with the ball valve connector, so as to realize oil draining.

[0012] Further, the device further comprises an oil draining pipe 6, which is arranged on the outlet of the ball valve 7, so as to realize oil draining.

[0013] Further, the device further comprises a placing rack 9, which is used for placing the test device and can ensure a test posture.

[0014] Further, the device further comprises an oil storage box 10, which is used for storing test oil.

[0015] Further, a metering container 11 is arranged below the oil leakage hole 5 and is used for metering the oil leakage amount per unit time.

[0016] Technical effects

[0017] The device has the advantages of simple structure, high reliability and convenient operation, can realize test and oil leakage amount detection of the pressure oiling control valve in the reverse direction, and improves the safety of the airplane. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model discloses a kind of test devices of pressure oiling control valve reverse oil leakage, and the structure is as shown in the figure:

[0019] Figure 1 Pressure oiling control valve reverse oil leakage test device structure schematic view;

[0020] Figure 2 It is the schematic view of sealed cylinder structure;

[0021] Figure 3 It is the schematic view of sealed cylinder structure assembly;

[0022] Wherein: 1. sealed cylinder assembly, 2. air nozzle, 3. oil nozzle, 4. ball valve connector, 5. oil leakage hole, 6. oil draining pipe, 7. ball valve, 8. liquid level gauge, 9. placing rack, 10. oil storage box, 11. metering container;1a. cylinder body, 1b. cylinder cover, 1c. mounting plate. DETAILED DESCRIPTION

[0023] The utility model discloses a kind of test devices of pressure oiling control valve reverse oil leakage, and the structure is as shown in the figure:

[0024] As shown in the figure, Figure 1As shown. Provide a pressure fuel control valve reverse oil leakage test device, including a sealed cylinder assembly 1, air nozzle 2, oil nozzle 3, ball valve connector 4, oil leakage hole 5, oil drain pipe 6, ball valve 7, liquid level meter 8, rack 9, oil storage box 10, measuring container 11; wherein the sealed cylinder assembly is composed of cylinder body 1a, cylinder cover 1b, mounting plate 1c.

[0025] The sealed cylinder 1 is placed on the rack 9, the pressure fuel control valve is installed in the sealed cylinder 1 with fasteners, the cylinder cover 1b is installed on the cylinder body 1a with fasteners, and the ball valve 7 at the bottom of the sealed cylinder is closed; the sealing plug cap of the air nozzle 2 and the oil nozzle 3 is twisted off, the test oil is injected through the oil nozzle 3, at this time the air in the sealed cylinder can be discharged through the air nozzle 2, and the liquid level in the sealed cylinder 1 is determined to stop oil injection when the liquid level reaches the specified height by observing the liquid level meter 8; After oil injection, the oil nozzle plug cap is reset, and whether the oil leakage hole 5 leaks oil is observed.

[0026] If there is oil leakage, it means that the pressure fuel control valve and the mounting plate 1c are not sealed, and the test conditions cannot be met. The contact surface between the oil control valve, the sealing ring and the mounting plate 1c needs to be cleaned and reinstalled until no oil leaks from the oil leakage hole.

[0027] If there is no oil leakage, compressed air can be injected into the sealed cylinder 1 through the air nozzle 2 to pressurize to the target test pressure, and then the pressure is maintained for three minutes, while observing whether there is oil leakage through the oil leakage hole 5, and the oil leakage amount is determined by the measuring container 11; Then twist off the oil nozzle sealing plug cap to release pressure, open the ball valve 7 at the bottom of the sealed cylinder 1 to discharge the test oil to the oil storage box 10, and take out the pressure fuel control valve to be tested.

[0028] After one round of test, the sealed cylinder assembly 1 and the connected air nozzle 2, oil nozzle 3, oil drain pipe 6, sealing ring are disassembled and cleaned, and then reset.

Claims

1. A pressure refueling control valve reverse oil leakage test device characterized by comprising: It includes sealing cylinder assembly (1), air nozzle (2), oil nozzle (3), ball valve connector (4), oil leakage hole (5), oil drain pipe (6), ball valve (7), liquid level meter (8), rack (9), oil storage box (10), metering container (11); wherein the sealing cylinder assembly is composed of cylinder body (1a), cylinder cover (1b), mounting plate (1c); It includes sealing cylinder assembly (1), the sealing cylinder assembly (1) is composed of cylinder body (1a), cylinder cover (1b), mounting plate (1c), the cylinder cover (1b) is arranged on one side of the cylinder body (1a), is connected and fixed through fastener, and adopts sealing ring sealing, the mounting plate (1c) is fixed on the other side of the cylinder body (1a) through fastener, and adopts sealing ring sealing;The cylinder cover (1b) is provided with air nozzle (2) and oil nozzle (3), and is provided with corresponding sealing cap;The mounting plate (1c) is provided with ball valve connector (4) and oil leakage hole (5), and the sidewall of the cylinder body (1a) is provided with liquid level meter (8).

2. The apparatus according to claim 1, wherein It also includes handle, which is arranged on the cylinder cover (1b), facilitating movement and transportation.

3. The apparatus according to claim 2, wherein The mounting plate (1c) is provided with annular groove, and the side of the cylinder body (1a) connected with the mounting plate (1c) is provided with annular boss, the annular groove and the annular boss are matched with each other in shape, and the sealing ring is arranged between the annular groove and the annular boss, so that the sealing effect can be enhanced.

4. The apparatus according to claim 3, wherein The liquid level meter (8) is provided with scale line, which is convenient for observing whether the working liquid level is reached.

5. The apparatus according to claim 4, wherein It also includes ball valve (7), which is arranged on the mounting plate (1c) and communicates with the ball valve connector, so as to realize oil drainage.

6. A pressure refueling control valve reverse leakage test device according to claim 5, wherein It also includes oil drain pipe (6), which is installed on the outlet of the ball valve (7), so as to realize drainage of oil.

7. The apparatus according to claim 6, wherein It also includes rack (9), which is used for placing test device, so as to ensure test posture.

8. The apparatus according to claim 7, wherein It also includes oil storage box (10), which is used for accommodating test oil.

9. The apparatus according to claim 8, wherein The oil leakage hole (5) is provided with metering container (11) below, which is used for metering oil leakage amount per unit time.

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