A large pass oil passage valve

Abstract

This invention proposes a large-diameter oil passage valve, comprising an oil supply pipeline and a piston cylinder, with a flap valve hinged to the oil supply pipeline. A connecting rod is provided between the piston cylinder and the flap valve to enable linkage between the flap valve and the piston. The oil inlet end of the oil supply pipeline communicates with a cavity on one side of the piston in the piston cylinder, while an oil bypass is provided on the cavity on the other side of the piston. A control valve is connected to the oil bypass to change the pressure difference on both sides of the piston, thereby driving the rotation of the flap valve. This invention significantly reduces the internal space through the lever principle, effectively reducing weight and improving working efficiency. By employing a self-locking valve, a pilot-operated self-locking electromagnetic oil passage valve is constructed. The pilot part uses a small-volume self-locking valve to control the on / off state, avoiding the system power loss and electromagnetic coil overheating problems caused by the long-term energization of conventional electromagnets.

Description

Technical Field

[0001] This invention relates to the field of oil passage valves, and more particularly to a large-diameter oil passage valve. Background Technology

[0002] The fuel valve is installed on the fuel supply line of a certain aircraft product. Its functions are: to cut off the fuel column under acceleration conditions to prevent the fuel tank from experiencing excessive local fuel overload pressure; to maintain normal fuel supply when the product is in controlled motion; and to ensure normal fuel supply during refueling and venting when stationary on the ground. Ordinary fuel valves cannot meet the customer's requirements for quality, size, and reliability. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a large-diameter oil passage valve to solve the problem of large volume in existing oil passage valves.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A large-diameter oil passage valve includes an oil supply pipeline and a piston cylinder disposed on one side of the oil supply pipeline. A flap valve for controlling the opening and closing of the oil supply pipeline is hinged to the oil supply pipeline. A connecting rod is provided between the piston of the piston cylinder and the flap valve so that the rotation of the flap valve and the sliding of the piston in the piston cylinder are linked. The oil inlet end of the oil supply pipeline is connected to a cavity located on one side of the piston in the piston cylinder. An oil bypass is provided on the cavity located on the other side of the piston. A control valve for controlling the opening and closing of the oil bypass is connected to the oil bypass so that the pressure difference on both sides of the piston changes, thereby driving the rotation of the flap valve.

[0006] Preferably, the oil bypass is connected to the oil pipeline, and the control valve is located on the oil pipeline.

[0007] Preferably, the oil bypass is connected to the oil outlet of the oil pipeline, and the oil outlet of the oil pipeline is located above the oil inlet of the oil pipeline.

[0008] Preferably, the piston is provided with a channel to connect the cavities on both sides of the piston, and the flow rate of the channel is less than the flow rate of the oil pipeline.

[0009] Preferably, a return spring is provided between the piston and the piston cylinder body.

[0010] Preferably, one end of the connecting rod is connected to the flap valve, and the other end is rotated and slidably engaged with the piston.

[0011] Preferably, the piston rod of the piston is provided with a cylindrical pin, and the connecting rod is provided with an elongated hole for the rotation and sliding of the cylindrical pin.

[0012] Preferably, the control valve is a self-locking valve.

[0013] Preferably, the control valve is an electromagnetic self-locking valve.

[0014] Preferably, the flap valve is provided with a fluoroether-cured sealing rubber plate.

[0015] The beneficial effects of this invention are as follows: By utilizing the lever principle, this invention enables the flap valve and piston to move in coordination, greatly reducing the internal space, effectively reducing weight, and improving work efficiency; by employing a self-locking valve, a pilot self-locking electromagnetic oil valve is constructed, with the pilot part using a small-volume self-locking valve to control the on / off state, avoiding the system power loss and electromagnetic coil overheating problems caused by the long-term energization of conventional electromagnets; the flap valve and the upper housing are sealed with a vulcanized sealing rubber plate, which provides high reliability and meets the sealing requirements of aircraft under extreme operating conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the external structure of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 and Figure 2As shown in the embodiment of the present invention, a large-diameter oil passage valve includes an oil supply pipeline 1 and a piston cylinder 3 disposed on one side of the oil supply pipeline 1. A flap valve 2 for controlling the opening and closing of the oil supply pipeline 1 is hinged to the oil supply pipeline 1 via a hinge shaft 21. The flap valve 2 can abut against the oil outlet end and can only be flipped towards the oil inlet end, so that when oil is introduced, the flap valve 2 is naturally pressed against the oil outlet end of the oil supply pipeline 1 to prevent oil from entering the oil outlet end. The oil outlet end of the oil supply pipeline 1 is an upper shell and the oil inlet end is a lower shell, and the upper shell and the lower shell are detachably connected. A connecting rod 4 is provided between the piston 31 of the piston cylinder 3 and the flap valve 2 to enable the rotation of the flap valve 2 and the sliding of the piston 31 within the piston cylinder 3 to be linked. The connecting rod 4 and the flap valve 2 are located on both sides of the hinge shaft, forming a lever structure. The oil inlet of the oil pipeline 1 is connected to the cavity in the piston cylinder 3 located below the piston 31, i.e., near the piston rod. The cavity located above the piston 31, i.e., away from the piston rod, is provided with an oil bypass 8. A control valve 5 is connected to the oil bypass 8 to control the opening and closing of the oil bypass 8, thereby controlling the pressure difference on both sides of the piston 31 and driving the rotation of the flap valve 2. During operation, the oil bypass 8 is opened by the control valve 5, allowing the oil in the cavity in the piston cylinder 3 away from the oil inlet of the oil pipeline 1 to flow out. The piston 3 then slides away from the oil inlet of the oil pipeline 1, causing the flap valve 2 to flip towards the oil inlet, thus opening the passage of the oil pipeline 1 and enabling the oil pipeline 1 to supply oil. This application utilizes the lever principle to make the flap valve 2 and the piston move together, which greatly reduces the internal space, effectively reduces weight, and improves work efficiency.

[0021] Preferably, the oil bypass 8 is connected to the oil pipeline 1 so that the oil in the oil bypass 8 can be recovered into the oil pipeline 1 for use. The control valve 5 is set on the oil pipeline 1, i.e. on the upper housing, which further makes the device simple in structure and small in size.

[0022] Preferably, the oil bypass 8 is connected to the oil outlet of the oil pipeline 1, and the oil outlet of the oil pipeline 1 is located above the oil inlet of the oil pipeline 1, so that the oil from the oil bypass 8 enters the oil outlet of the oil pipeline 1 and falls on the flap valve 2 between the oil outlet and the oil inlet. After the flap valve 2 is opened, it supplies oil to the machine together with the oil that has entered.

[0023] Preferably, the piston 31 is provided with a channel 311 to connect the cavities on both sides of the piston 31, so that the oil from the oil inlet of the oil supply line 1 can flow into the upper cavity of the piston cylinder after entering the piston cylinder. The flow rate of the channel 311 is much smaller than the flow rate of the oil supply line 1, resulting in a small inflow and a large outflow of oil in the upper cavity of the piston cylinder, thus creating a pressure difference. This causes the piston to slide and rotate, opening the flap valve 2. Because the flow rate of the channel 311 can be much smaller than the flow rate of the oil supply line 1, the oil supply line 1 can adopt a large-diameter structure. Furthermore, the piston 31 and the piston cylinder body are sealed by an O-ring 6.

[0024] Preferably, a return spring 7 is provided between the piston 31 and the bottom of the upper end of the piston cylinder 3, so that oil can enter the upper cavity of the oil pipeline 1 through the channel 311 to drive the flap valve 2 to close automatically.

[0025] Preferably, one end of the connecting rod 4 is connected to the flap valve 2, and the other end is rotatably and slidably engaged with the piston 31. Specifically, the piston rod of the piston 31 is provided with a cylindrical pin 32, and the connecting rod 4 is provided with an elongated hole 41 for the rotation and sliding of the cylindrical pin 32, so as to prevent the piston 31 from jamming when it is linked with the flap valve 2.

[0026] Preferably, the control valve 5 is a self-locking valve. In this embodiment, the control valve 5 is an electromagnetic self-locking valve. In this embodiment, the sealing part of the self-locking valve adopts a sealing structure between polytetrafluoroethylene propylene and the valve seat boss end face; the external sealing part is sealed by an O-ring made of FM-2D material. The oil valve is a pilot-operated structure made possible by an electromagnetic self-locking valve. Designed based on the principles of electromagnetic induction and leverage, when the opening coil of the self-locking valve is energized, the electromagnetic attraction force causes the valve core to move to the right against the spring force, opening the sealing surface at the valve core and thus opening the oil bypass 8. After de-energization, the locking force generated by the magnet keeps the valve core in the open position, creating a pressure difference between the upper and lower ends of the piston 31. Sufficient force pushes the piston 31 upward, transmitting the force to the flap valve 2 through the cylindrical pin 31 and connecting rod 4, opening the oil supply line 1. When the closing coil is energized, the armature moves to the left under the action of electromagnetic force. After de-energization, the spring force overcomes the locking force of the magnet, fixing the valve core in the closed position. The sealing surface between the valve core assembly and the valve seat is sealed, cutting off the oil bypass 8 and thus disconnecting the oil supply line 1, stopping the oil supply.

[0027] Preferably, the flap valve 2 and the upper housing are provided with a fluoroether vulcanized sealing rubber plate to provide a sealing function.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A large-diameter oil passage valve, characterized in that, It includes an oil pipeline (1) and a piston cylinder (3) located on one side of the oil pipeline (1). A flap valve (2) for controlling the opening and closing of the oil pipeline (1) is hinged to the oil pipeline (1) via a hinge shaft (21). A connecting rod (4) is provided between the piston (31) of the piston cylinder (3) and the flap valve (2) so that the rotation of the flap valve (2) and the sliding of the piston (31) in the piston cylinder (3) are linked. The oil inlet end of the oil pipeline (1) is connected to the cavity located on one side of the piston (31) in the piston cylinder (3), and an oil passage is provided on the cavity located on the other side of the piston (31). The bypass (8) is connected to a control valve (5) that controls the opening and closing of the oil bypass (8) so that the pressure difference on both sides of the piston (31) changes, thereby driving the rotation of the flap valve (2); the oil bypass (8) is connected to the oil outlet of the oil pipeline (1), and the oil outlet of the oil pipeline (1) is located above the oil inlet of the oil pipeline (1), so that the oil from the oil bypass (8) enters the oil outlet of the oil pipeline (1) and falls on the flap valve (2) between the oil outlet and the oil inlet. After the flap valve (2) is opened, it supplies oil to the machine together with the oil that enters. The flap valve (2) can abut against the oil outlet end and can only be flipped towards the oil inlet end, so that when oil is inlet, the flap valve (2) is naturally pressed against the oil outlet end of the oil pipeline (1) to prevent it from entering the oil outlet end; The connecting rod (4) and the flap valve (2) are located on both sides of the hinge shaft (21), forming a lever structure. The oil pipeline (1) includes an inlet pipe and an outlet pipe. The diameter of the inlet pipe is greater than that of the outlet pipe. The inlet pipe is connected to a biased inlet port. The biased inlet port is located on the side away from the hinge shaft (21). The biased inlet port is provided with a shrinkage structure on the side closer to the hinge shaft (21).

2. The large-diameter oil passage valve according to claim 1, characterized in that, The control valve (5) is installed on the oil pipeline (1).

3. The large-diameter oil passage valve according to claim 1 or 2, characterized in that, The piston (31) is provided with a channel (311) to allow the cavities on both sides of the piston (31) to communicate, and the flow rate of the channel (311) is less than the flow rate of the oil pipeline (1).

4. The large-diameter oil passage valve according to claim 3, characterized in that, A return spring (7) is provided between the piston (31) and the piston cylinder (3).

5. The large-diameter oil passage valve according to claim 4, characterized in that, One end of the connecting rod (4) is connected to the flap valve (2), and the other end is rotated and slidably engaged with the piston (31).

6. The large-diameter oil passage valve according to claim 5, characterized in that, The piston rod of the piston (31) is provided with a cylindrical pin (32), and the connecting rod (4) is provided with an elongated hole (41) for the cylindrical pin (32) to rotate and slide.

7. The large-diameter oil passage valve according to claim 6, characterized in that, The control valve (5) is a self-locking valve.

8. The large-diameter oil passage valve according to claim 7, characterized in that, The control valve (5) is an electromagnetic self-locking valve.

9. The large-diameter oil passage valve according to claim 8, characterized in that, The flap valve (2) is equipped with a fluoroether vulcanized sealing rubber plate.

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