Hand pump device for putting down landing gear and cabin door of outfield operation aircraft

Abstract

The utility model relates to the technical field of aviation, in particular to a hand pump device for putting down an undercarriage and a cabin door of an outfield operation aircraft, which comprises an oil tank, an oil return filter, an oil return stop valve, an unloading stop valve, a pressure gauge, an oil inlet filter, an oil inlet one-way valve and a hand pump which are sequentially connected in series, the sampling valve is arranged between the oil return filter and the oil return stop valve, the oil return one-way valve is arranged between the oil return stop valve and the unloading stop valve, and the setting of an oil return hose, a pressure supply hose, the volume of an oil tank, the measuring range of a pressure gauge and the output pressure of a hand pump is further included. Dangerous conditions such as insufficient oil quantity and pressure or insufficient measuring range of a pressure gauge are avoided; the length of the pressure supply hose and the length of the oil return hose are set to ensure that an undercarriage and a cabin door of an outfield operation aircraft have enough activity space when put down, so that the risk that an operator is injured by the undercarriage when being close to the aircraft is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation, in particular to a hand pump device for lowering landing gear and cabin doors of an aircraft for field operations. Background Art

[0002] Due to special reasons, the aircraft needs to be transferred to the field to carry out special off-site operations. When the aircraft is transferred to the outside of the field factory, the aircraft landing gear and cabin door need to be lowered. However, there is a lack of electricity outside the field factory, and it is not possible to use a fuel truck to lower the landing gear and cabin door. It is necessary to develop relevant devices that do not require the use of electricity to lower the landing gear and cabin door and then transfer them to the factory on the ground.

[0003] In view of the limitations of the above-mentioned actual working conditions, it is necessary to develop a hand-cranked pump device for retracting and lowering the landing gear and hatch doors of aircraft for field operations, which can be used to replace the fuel truck with power supply to lower the landing gear and hatch doors at a remote location, thereby solving the problem of lack of power conditions outside the field factory and the inability to use fuel trucks to lower the landing gear and hatch doors. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a hand pump device for lowering the landing gear and cabin door of an aircraft for field operations.

[0005] A hand pump device for lowering landing gear and doors of an aircraft for field operations comprises a fuel tank, a return oil filter, a return oil stop valve, an unloading stop valve, a pressure gauge, an inlet oil filter, an inlet oil check valve, and a hand pump, which are connected in series in sequence. The device also comprises a sampling valve disposed between the return oil filter and the return oil stop valve, a return oil check valve disposed between the return oil stop valve and the unloading stop valve, and a return oil hose and a pressure supply hose.

[0006] The two ends of the hand pump are detachably connected to the oil tank and the oil inlet one-way valve through hydraulic stainless steel pipes;

[0007] The two ends of the oil inlet filter are detachably connected to the oil inlet one-way valve and the pressure gauge through hydraulic stainless steel pipes;

[0008] The two ends of the unloading stop valve are detachably connected to the pressure gauge and the oil return stop valve through hydraulic stainless steel pipes;

[0009] The inlet end of the pressure supply hose is arranged between the pressure gauge and the unloading stop valve, and is detachably connected to the stainless steel conduit between the unloading stop valve and the pressure gauge through a stainless steel three-way joint;

[0010] The outlet end of the oil return hose is arranged between the oil return stop valve and the unloading stop valve, and is detachably connected to the stainless steel conduit between the unloading stop valve and the oil return stop valve through a stainless steel three-way joint.

[0011] The beneficial effects of the utility model are as follows: the setting of the fuel tank capacity, the pressure gauge range, and the hand pump output pressure ensures that the landing gear and the cabin door of the aircraft for field operations are lowered reliably and safely, avoiding dangerous situations such as insufficient fuel volume, pressure, or insufficient pressure gauge range; the setting of the length of the pressure supply hose and the oil return hose ensures that there is enough room for movement when the landing gear and the cabin door of the aircraft for field operations are lowered, thereby avoiding the risk of operators being injured by the landing gear if they are too close to the aircraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the pipeline connection structure of the utility model;

[0014] Figure numerals: 1. Oil tank; 2. Return oil filter; 3. Return oil stop valve; 4. Unloading stop valve; 5. Pressure gauge; 6. Sampling valve; 7. Oil inlet filter; 8. Oil inlet one-way valve; 9. Hand pump; 10. Return oil one-way valve; 11. Pressure supply hose; 12. Return oil hose; 13. Oil level gauge. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below.

[0016] like Figure 1 As shown, a hand pump device for lowering landing gear and doors of an aircraft for field operations includes, in series, a fuel tank 1, a return oil filter 2, a return oil shutoff valve 3, an unloading shutoff valve 4, a pressure gauge 5, an inlet oil filter 7, an inlet oil check valve 8, and a hand pump 9. The device also includes a sampling valve 6 disposed between the return oil filter 2 and the return oil shutoff valve 3, a return oil check valve 10 disposed between the return oil shutoff valve 3 and the unloading shutoff valve 4, a return oil hose 12, and a pressure supply hose 11.

[0017] The two ends of the hand pump 9 are detachably connected to the oil tank 1 and the oil inlet one-way valve 8 through hydraulic stainless steel pipes;

[0018] The two ends of the oil inlet filter 7 are detachably connected to the oil inlet one-way valve 8 and the pressure gauge 5 through hydraulic stainless steel pipes;

[0019] The two ends of the unloading stop valve 4 are detachably connected to the pressure gauge 5 and the oil return stop valve 3 through hydraulic stainless steel pipes;

[0020] The inlet end of the pressure supply hose 11 is arranged between the pressure gauge 5 and the unloading stop valve 4, and is detachably connected to the stainless steel conduit between the unloading stop valve 4 and the pressure gauge 5 through a stainless steel tee joint;

[0021] The outlet end of the oil return hose 12 is arranged between the oil return stop valve 3 and the unloading stop valve 4, and is detachably connected to the stainless steel conduit between the unloading stop valve 4 and the oil return stop valve 3 through a stainless steel three-way joint.

[0022] The oil return hose 12 is specifically divided into two sections, and the two sections of the oil return hose 12 are connected through the oil return one-way valve 10.

[0023] The two ends of the sampling valve 6 are detachably connected to the return oil stop valve 3 and the return oil filter 2 through hydraulic stainless steel conduits.

[0024] The other end of the return oil filter 2 is detachably connected to the oil tank 1 through a hydraulic stainless steel conduit.

[0025] The oil return stop valve 3 and the unloading stop valve 4 both adopt screw-type handles, which are convenient for operators to use and improve work efficiency.

[0026] The volume of the fuel tank 1 is set to 25-30L, the range of the pressure gauge 5 is set to 40-50MPa, and the output pressure of the hand pump 9 is set to 35-40MPa. The settings of the volume of the fuel tank 1, the range of the pressure gauge, and the output pressure of the hand pump ensure that the landing gear and the door of the aircraft are lowered reliably and safely during field operations, avoiding dangerous situations such as insufficient oil, pressure, or insufficient pressure gauge range.

[0027] The lengths of the pressure supply hose 11 and the oil return hose 12 are 10-15 m respectively. The setting of the lengths of the pressure supply hose 11 and the oil return hose 12 ensures that there is sufficient space for the landing gear and cabin door of the aircraft during field operations, thereby avoiding the risk of operators being injured by the landing gear when they are too close to the aircraft.

[0028] The oil tank 1 is provided with an oil level gauge 13 for observing the oil level in the oil tank 1 so as to replenish the hydraulic oil in the oil tank 1 in time.

[0029] like Figure 1 As shown, during use, it is first necessary to connect the pressure supply hose 11 and the oil return hose 12 to the corresponding retraction and extension joints of the landing gear or cabin door on the aircraft, and supply pressure to the system by shaking the hand pump handle. The device is provided with a pressure gauge 5. By observing the pressure display, the supply pressure in the system can be grasped, thereby ensuring safe and reliable unlocking of the landing gear and cabin door. The device is also provided with a return oil shut-off valve 3 to ensure that the landing gear falls smoothly during the lowering process to avoid accidental falling.

[0030] The sampling valve 6 can be used to collect hydraulic oil samples in the device, test the contamination level of the hydraulic oil, and avoid contamination of the aircraft hydraulic system.

[0031] The oil inlet one-way valve 8 is used to prevent the hydraulic oil pressure backlash from damaging the hydraulic pump; the oil inlet one-way valve 8 is used to prevent the hydraulic oil pressure shock from damaging the aircraft hydraulic actuation system when the unloading stop valve 4 is opened.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A hand pump device for lowering landing gear and doors of aircraft for field operations, characterized by: The invention comprises an oil tank (1), a return oil filter (2), a return oil stop valve (3), an unloading stop valve (4), a pressure gauge (5), an inlet oil filter (7), an inlet oil check valve (8), and a hand pump (9) which are connected in series in sequence. The invention also comprises a sampling valve (6) arranged between the return oil filter (2) and the return oil stop valve (3), a return oil check valve (10) arranged between the return oil stop valve (3) and the unloading stop valve (4), an oil return hose (12), and a pressure supply hose (11): The two ends of the hand pump (9) are detachably connected to the oil tank (1) and the oil inlet one-way valve (8) through hydraulic stainless steel pipes; The two ends of the oil inlet filter (7) are detachably connected to the oil inlet one-way valve (8) and the pressure gauge (5) through hydraulic stainless steel pipes; The two ends of the unloading stop valve (4) are detachably connected to the pressure gauge (5) and the oil return stop valve (3) through hydraulic stainless steel pipes; The inlet end of the pressure supply hose (11) is arranged between the pressure gauge (5) and the unloading stop valve (4), and is detachably connected to the stainless steel conduit between the unloading stop valve (4) and the pressure gauge (5) through a stainless steel three-way joint; The outlet end of the oil return hose (12) is arranged between the oil return stop valve (3) and the unloading stop valve (4), and is detachably connected to the stainless steel conduit between the unloading stop valve (4) and the oil return stop valve (3) through a stainless steel three-way joint.

2. A hand pump device for lowering landing gear and doors of an aircraft for field operations according to claim 1, characterized in that: The oil return hose (12) is specifically divided into two sections, and the two sections of the oil return hose (12) are connected via the oil return one-way valve (10).

3. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The two ends of the sampling valve (6) are detachably connected to the oil return stop valve (3) and the oil return filter (2) through hydraulic stainless steel conduits.

4. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The other end of the return oil filter (2) is detachably connected to the oil tank (1) via a hydraulic stainless steel conduit.

5. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The oil return stop valve (3) and the unloading stop valve (4) both adopt screw handles.

6. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The volume of the oil tank (1) is set to 25-30L, the range of the pressure gauge (5) is set to 40-50MPa, and the output pressure of the hand pump (9) is set to 35-40MPa.

7. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The lengths of the pressure supply hose (11) and the oil return hose (12) are respectively 10-15 m.

8. The hand pump device for lowering landing gear and door of an aircraft for field operations according to claim 1, characterized in that: The oil tank (1) is provided with an oil level gauge (13).

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