Pneumatic operating mechanism for pilot valve of refueling bolt of airport apron aviation oil pipe network

Abstract

The utility model belongs to the technical field of connection, opening and closing of airport apron aviation oil pipe networks, and particularly relates to a pneumatic operating mechanism for a pilot valve of a refueling bolt of an airport apron aviation oil pipe network, which comprises a pneumatic operating mechanism valve body. An air cylinder, a piston, an emergency mechanical release valve, an emergency mechanical release valve lock pin, an air pipe connector, an emergency pull rope connecting ring, an exhaust hole, a first return spring and a second return spring are installed in the pneumatic operating mechanism valve body. The pneumatic operating mechanism for the airport apron aviation oil pipe network refueling bolt pilot valve provides double closing. When a refueler releases the DEADMAN, air pressure is released, the pilot valve is closed and kept in a closed state, meanwhile, like an original manual mechanical operating mechanism, an emergency mechanical release valve lock pin is provided with an emergency pull rope connecting ring and connected with an emergency pull rope, the emergency pull rope connecting ring can be used as a standby, remote closing is achieved when the pneumatic pilot valve operating mechanism breaks down, and meanwhile, the emergency mechanical release valve lock pin is connected with the emergency pull rope. The workload of a refueling worker is reduced, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to a pneumatic operating mechanism for a pilot valve of a refueling plug in an apron fuel pipeline network, belonging to the field of apron fuel pipeline network connection and opening / closing. Background Technology

[0002] Currently, the pilot valve controlling the opening and closing of the refueling hydrant is a manual switch (manual mechanical operating mechanism). After the refueling operator connects the wellhead, they need to press the pilot valve manual switch to open the refueling hydrant. To close the refueling hydrant, the pilot valve manual switch is closed by pulling the emergency rope.

[0003] This approach carries the following risks:

[0004] 1. If the pilot valve is manually switched on after the well joint is connected, and other equipment is not yet connected and the refueling volume is not yet confirmed, the refueling pipeline will be pressurized and waiting. This may cause oil leakage due to failure of other valves or pipelines. If not detected in time, it may cause an oil leak incident on the apron.

[0005] 2. To avoid the above risks, if you return to the refueling nozzle position and press the pilot valve manual switch after confirming the equipment connection and refueling amount, it will increase the labor intensity.

[0006] 3. When it is necessary to shut off the refueling hydrant in an emergency, the refueling operator needs to release the DEADMAN switch, locate the pull rope, and pull it remotely to close the pilot valve manual switch. However, the pull rope may sometimes be blocked or obstructed by other equipment, especially when the refueling hydrant is on the other side of the vehicle's control room or when the refueling operator is on a platform. In such cases, pulling the rope may be difficult or untimely, and the hydrant may not be able to be shut off in time during an emergency. Utility Model Content

[0007] The main objective of this invention is to provide a pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron fuel pipeline, which can solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention proposes a pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron aviation fuel pipeline, comprising a pneumatic operating mechanism valve body, wherein a cylinder, a piston, an emergency mechanical release valve, an emergency mechanical release valve locking pin, an air pipe connector, an emergency pull rope connecting ring, an exhaust port, a return spring one, and a return spring two are installed in the pneumatic operating mechanism valve body.

[0009] Preferably, the cylinder is equipped with a piston and a return spring, and the pneumatic piston is connected to the pilot valve core.

[0010] Preferably, the valve body of the pneumatic operating mechanism is equipped with an air pipe connector, through which air pressure can be connected to the cylinder.

[0011] Preferably, the emergency mechanical release valve has two working positions. Position 1 is the working position: when the emergency mechanical release valve is pulled outward, the exhaust port is closed and not connected to the cylinder, but the air pipe is connected to the cylinder. Position 2 is the emergency position: when moved to the left, the air pipe connector is closed, the air pipe is not connected to the cylinder, the exhaust port is connected to the cylinder, and the air pressure inside the cylinder is discharged.

[0012] Preferably, the emergency mechanical release valve is equipped with an emergency mechanical release valve locking pin, which automatically locks the emergency mechanical release valve when it is pulled outward.

[0013] Preferably, the emergency mechanical release valve locking pin is equipped with an emergency pull rope connecting ring. When the emergency mechanical release valve is automatically locked by the emergency mechanical release valve locking pin, pulling the emergency pull rope connecting ring can unlock it. Under the action of the return spring, the emergency mechanical release valve moves to the left and automatically resets.

[0014] Preferably, the pneumatic operating mechanism valve body is connected to the pilot valve body, and the mounting holes of the pneumatic operating mechanism valve body and the pilot valve body have the same data, which facilitates installation.

[0015] The beneficial effects of this utility model are: compared with the manual mechanical operating mechanism, the pneumatic pilot valve operating mechanism has certain advantages.

[0016] I. Safer:

[0017] 1. In the event of a fire or a vehicle collision with the manhole connector, the air pressure pipeline may rupture and the air pressure may be released. At this time, the piston of the pneumatic pilot valve operating mechanism will return to its original position, and the pilot valve will automatically close, thereby closing the refueling plug and promptly shutting off the refueling plug in the apron pipeline network to avoid a larger accident.

[0018] 2. The filler cap remains closed when the DEADMAN switch is not pressed.

[0019] 3. The pneumatic pilot valve operating mechanism provides dual closure. When the refueling operator releases the DEADMAN, the air pressure is released, the pilot valve closes and remains closed. At the same time, like the original manual mechanical operating mechanism, the emergency mechanical release valve locking pin is equipped with an emergency pull rope connecting ring. Connecting the emergency pull rope can serve as a backup, enabling remote closure in case of a failure of the pneumatic pilot valve operating mechanism.

[0020] II. More convenient:

[0021] 1. The refueling operator opens and closes the refueling plug via DEADMAN, which is especially suitable for refueling operators in remote locations such as the lifting platform of the aircraft fuel panel control device, making it easier to open and close; overcoming the shortcomings of the original pull rope closing mechanism.

[0022] 2. It reduces the workload of refueling staff by eliminating the need to press the manual mechanical operating mechanism after the equipment is connected and the refueling volume is confirmed.

[0023] Third, it improved the safety and standard compliance of the fuel filler.

[0024] 1. According to EI 1584 2.2.8.1, the cable closure should be effective at any pulling angle or direction. Manual mechanical operating mechanisms cannot meet the requirements, but this pneumatic pilot valve operating mechanism can meet the requirements of the above standard.

[0025] 2. In its notification of aviation fuel leaks, JIG also recommended the promotion of pilot valve control mechanisms with dual safety functions of pneumatic / manual (pull cord) closure. JIG also recommended adding a clause requiring the use of pilot valve control mechanisms with dual safety functions of pneumatic / manual (pull cord) closure in the next revision of the standard. Attached Figure Description

[0026] Figure 1 This is a front view schematic diagram of the overall structure of this utility model.

[0027] Figure 2 This is a side view of the overall structure of this utility model.

[0028] Figure 3 This is a top view of the overall structure of this utility model.

[0029] In the diagram: 1. Valve body; 2. Cylinder; 3. Piston; 4. Emergency release valve; 5. Emergency release valve locking pin; 6. Emergency pull rope connecting ring; 7. Air pipe connector; 8. Exhaust port; 9. Return spring one; 10. Return spring two. Detailed Implementation

[0030] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The pneumatic operating mechanism valve body 1 is equipped with a cylinder 2, a piston 3, an emergency mechanical release valve 4, an emergency mechanical release valve locking pin 5, an air pipe connector 7, an exhaust port 8, a return spring 1 9, and a return spring 2 10.

[0032] Emergency mechanical release valve 4 has two working positions. Position 1 is the working position: outward and upward. Figure 1When the emergency mechanical release valve 4 is pulled to the right, the exhaust port 8 is closed and not connected to the cylinder 2. The air pipe is connected to the cylinder. Position 2 is the emergency position: when moved to the left, the air pipe connector 7 is closed, the air pipe is not connected to the cylinder, the exhaust port 8 is connected to the cylinder 2, and the air pressure in the cylinder is discharged.

[0033] Emergency mechanical release valve 4 is equipped with an emergency mechanical release valve locking pin 5. When it is turned outwards... Figure 1 When the emergency mechanical release valve 4 is pulled to the right, the emergency mechanical release valve 4 is automatically locked by the emergency mechanical release valve locking pin 5.

[0034] The emergency mechanical release valve locking pin 5 is equipped with an emergency pull rope connecting ring 6. When the emergency mechanical release valve 4 is automatically locked by the emergency mechanical release valve locking pin 5, pulling the emergency pull rope connecting ring 6 can unlock it. The emergency mechanical release valve 4 moves to the left under the action of the return spring and automatically resets.

[0035] In use, the gas hose connector 7 and the PCV gas hose of the pipeline refueling truck are connected in parallel. The emergency pull rope of the pipeline truck is connected to the emergency pull rope connecting ring 6. The refueling operator can open and close the refueling valve by operating the DEADMAN switch. In an emergency, pulling the emergency pull rope can also close the refueling valve. After the emergency operation is over, the emergency mechanical release valve 4 needs to be pulled to return to the working position.

[0036] The mounting hole of the valve body (1) of this pneumatic operating mechanism is the same as the mounting hole of the pilot valve body, which makes it easy to replace the original manual switch with this pneumatic operating mechanism.

[0037] During use, when the refueling operator releases the DEADMAN, the air pressure is released, the pilot valve closes and remains closed. At the same time, like the original manual mechanical operating mechanism, the emergency mechanical release valve locking pin is equipped with an emergency pull rope connecting ring. Connecting the emergency pull rope can be used as a backup to achieve remote closure in case of failure of the pneumatic pilot valve operating mechanism.

[0038] Meanwhile, the refueling operator can open and close the refueling plug via DEADMAN, which is especially suitable for refueling operators in remote locations such as the lifting platform of the aircraft fuel panel control device, making it easier to open and close. It overcomes the shortcomings of the original pull rope closing mechanism, reduces the workload of the refueling operator, and eliminates the need to press the manual mechanical operating mechanism after the equipment connection and refueling amount are confirmed.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pneumatic operating mechanism for the pilot valve of the fuel filler plug in an apron aviation fuel pipeline, characterized in that: It includes a pneumatic operating mechanism valve body (1), which is equipped with a cylinder (2), a piston (3), an emergency mechanical release valve (4), an emergency mechanical release valve locking pin (5), an air pipe connector (7), an emergency pull rope connecting ring (6), an exhaust hole (8), a return spring one (9) and a return spring two (10).

2. The pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron aviation fuel pipeline according to claim 1, characterized in that: The cylinder (2) is equipped with a piston (3) and a return spring (9), and the piston (3) is connected to the pilot valve core.

3. The pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron aviation fuel pipeline according to claim 2, characterized in that: The pneumatic operating mechanism valve body (1) is equipped with an air pipe connector (7), and the air pressure can be connected to the cylinder (2) through the air pipe connector (7).

4. The pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron aviation fuel pipeline according to claim 3, characterized in that: The emergency mechanical release valve (4) has two working positions. Position 1 is the working position: when the emergency mechanical release valve (4) is pulled outward, the exhaust port (8) is closed and not connected to the cylinder (2), while the air pipe is connected to the cylinder. Position 2 is the emergency position: when moved to the left, the air pipe connector (7) is closed, the air pipe is not connected to the cylinder, the exhaust port (8) is connected to the cylinder (2), and the air pressure inside the cylinder is discharged.

5. The pneumatic operating mechanism for the pilot valve of the fuel filler plug in the apron aviation fuel pipeline according to claim 4, characterized in that: The emergency mechanical release valve (4) is equipped with an emergency mechanical release valve locking pin (5). When the emergency mechanical release valve (4) is pulled outward, the emergency mechanical release valve (4) is automatically locked by the emergency mechanical release valve locking pin (5).

6. The pneumatic operating mechanism for the pilot valve of the fuel filler plug in an apron aviation fuel pipeline according to claim 5, characterized in that: The emergency mechanical release valve locking pin (5) is equipped with an emergency pull rope connecting ring (6). When the emergency mechanical release valve (4) is automatically locked by the emergency mechanical release valve locking pin (5), pulling the emergency pull rope connecting ring (6) can unlock it. The emergency mechanical release valve (4) moves to the left under the action of the return spring (10) and automatically resets.

7. A pneumatic operating mechanism for a pilot valve of a fuel filler plug in an apron aviation fuel pipeline according to claim 6, characterized in that: The pneumatic operating mechanism valve body (1) is connected to the pilot valve body. The mounting holes of the pneumatic operating mechanism valve body (1) are the same as those of the pilot valve body, which facilitates installation.

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