Automatic unloading device for aviation kerosene tanker

Abstract

The present invention discloses an automatic oil unloading device for aviation kerosene tank truck, comprising a pulley block, a chain rope, a buoy, a valve head, an upper cover, an intermediate body, a floating ball, a ball holder and a lower body, wherein the pulley block is installed on the lower body, the chain rope passes through one end of the pulley block and is connected to the floating ball outside the lower body, and the other end is connected to the bottom of the floating ball, the valve head is placed between the upper cover and the intermediate body, the upper cover is connected to the intermediate body, the intermediate body is connected to the lower body by a thread, the floating ball is installed in the lower body, and the ball holder is arranged at the lower part of the floating ball to limit the floating ball from separating from the lower body. The automatic oil unloading device for aviation kerosene tank truck of the present invention can automatically control the liquid level in the tank truck, prevent air from entering the oil extraction pipe, and after the oil extraction pipe is pulled out from the tank truck, the kerosene remaining in the tank will be much less than before, saving manpower, reducing the labor intensity of workers and accelerating the oil unloading speed.

Description

Technical Field

[0001] The invention relates to an automatic oil unloading device for an aviation kerosene tanker. Background Art

[0002] At present, aircraft fuel in most countries in the world is transported by train. When unloading oil, the top cover of the tank truck is opened, the oil extraction pipe is inserted into the bottom of all tank trucks, and then the oil extraction pump is started, and the valve of each oil extraction pipe is opened, and the aviation kerosene flows from the tank truck to the oil storage tank; the problem is that when the oil is pumped close to the bottom of the oil tank, the valve of the oil extraction pipe must be closed in time. A train has n oil tanks and n oil extraction pipes. If one valve is not closed in time, air will be sucked into the pipeline from the oil pipe. Once air enters the oil pump, the oil pump will immediately stop pumping oil and run idle. If the time is a little longer, the oil pump will overheat and be damaged. For this reason, every time the oil is unloaded, not only more people are needed to pay attention to the oil level in the tank truck, but also, because of the fear that air will enter the oil extraction pipe, there will be more oil left in the tank, and the oil must be taken out manually. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic oil unloading device for aviation kerosene tank trucks which can save manpower, reduce the labor intensity of workers and speed up the oil unloading speed.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: an automatic oil unloading device for an aviation kerosene tank truck, comprising a pulley block, a chain rope, a buoy, a valve head, an upper cover, an intermediate body, a float, a ball holder and a lower body, wherein the pulley block is installed on the lower body, the chain rope passes through one end of the pulley block and is connected to the buoy outside the lower body, and the other end is connected to the bottom of the float, the valve head is placed between the upper cover and the intermediate body, the upper cover is connected to the intermediate body, the intermediate body is connected to the lower body by threads, the float is installed in the lower body, and the ball holder is arranged at the lower part of the float to limit the float from detaching from the lower body.

[0005] An angle bracket is installed on the upper part of the valve head in the upper cover, and a spring is connected between the angle bracket and the valve head.

[0006] A sealing ring is installed between the valve head and the intermediate body.

[0007] The upper cover and the intermediate body are sealed by an O-type sealing ring.

[0008] The intermediate body and the lower body are sealed by a gasket.

[0009] The invention discloses an automatic oil unloading device for aviation kerosene tank truck, which can automatically control the liquid level in the tank truck and prevent air from entering the oil extraction pipe. After the oil extraction pipe is pulled out from the tank truck, the kerosene remaining in the tank will be much less than before, thus saving manpower, reducing the labor intensity of workers and accelerating the oil unloading speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a structural schematic diagram of an automatic oil unloading device for an aviation kerosene tanker.

[0011] Figure 2 The present invention is a schematic structural diagram of a second embodiment of an automatic oil unloading device for an aviation kerosene tanker.

[0012] In the figure: 1. pulley block; 2. chain rope; 3. float; 4. sealing ring; 5. valve head; 6. bolt; 7. spring; 8. upper cover; 9. gasket; 10. fastening ring; 11. O-ring; 12. intermediate body; 13. gasket; 14. float; 15. ball holder; 16. lower body; 17. angle bracket. DETAILED DESCRIPTION

[0013] Embodiment 1: Figure 1 As shown, the automatic unloading device of the aviation kerosene tanker includes a pulley block 1, a chain rope 2, a buoy 3, a valve head 5, an upper cover 8, an intermediate body 12, a floating ball 14, a ball holder 15 and a lower body 16. The pulley block 1 is installed on the lower body 16, the chain rope 2 passes through the pulley block 1 and is connected to the buoy 3 outside the lower body 16 at one end, and is connected to the bottom of the floating ball 14 at the other end. The valve head 5 is placed between the upper cover 8 and the intermediate body 12, the upper cover 8 and the intermediate body 12 are connected by bolts 6, the intermediate body 12 and the lower body 16 are connected by threads, the floating ball 14 is installed in the lower body 16, the ball holder 15 is arranged at the lower part of the floating ball 14 to limit the floating ball from separating from the lower body, a sealing ring 4 is installed between the valve head 5 and the intermediate body 12 to form a first pair of sealing pairs, the upper cover 8 and the intermediate body 12 are sealed by an O-ring 11, the intermediate body 12 and the lower body 16 are sealed by a gasket 13, and a gasket is provided on the inner side of the joint at the top of the upper cover 8 for connecting to the external pipeline 9, a fastening ring 10 is provided on the outside. When working, the upper part of the device is directly connected to the lower end of the oil pumping pipe of the oil unloading station, sealed by the gasket 9, and fixed by the fastening ring 10. When the whole set of device is inserted into the kerosene tank with the oil pumping pipe, due to the buoyancy, the buoy 3 floats upward. At the same time, the chain rope 2 pulls the float 14 to sink, and the oil passage in the lower body 16 is opened. After the oil pump works, the valve head 5 in the device is sucked up by the negative pressure, and the oil path in the device is unblocked; when the kerosene in the tank is pumped to the bottom, the buoy 3 sinks, the chain rope 2 is relaxed, and the float 14 floats until the inner channel is blocked, and the oil pumping pipe stops pumping oil. The valve head 5 sinks due to the action of gravity, and also blocks the channel for the return flow of the oil pumping pipe; when all the oil pumping pipes stop pumping oil, the oil pump output pressure is zero, the pump can be stopped, and all the oil pumping pipes can be extracted from the tank. At this time, the oil pumping pipe, due to the double seal of the device, the kerosene in the pipe will not leak due to stopping the pump.

[0014] Embodiment 2: Figure 2As shown, the automatic unloading device of aviation kerosene tanker includes a pulley block 1, a chain rope 2, a buoy 3, a valve head 5, a spring 7, an upper cover 8, an intermediate body 12, a floating ball 14, a ball holder 15, a lower body 16 and an angle bracket 17. The pulley block 1 is installed on the lower body 16, the chain rope 2 passes through the pulley block 1 and is connected to the buoy 3 outside the lower body 16 at one end, and is connected to the bottom of the floating ball 14 at the other end. The valve head 5 is placed between the upper cover 8 and the intermediate body 12, the upper cover 8 and the intermediate body 12 are connected by bolts 6, and the intermediate body 12 and the lower body 16 are connected by screws. The float 14 is installed in the lower body 16, and the ball holder 15 is arranged at the lower part of the float 14 to limit the float from the lower body. A sealing ring 4 is installed between the valve head 5 and the intermediate body 12 to form a first pair of sealing pairs. The upper cover 8 and the intermediate body 12 are sealed by an O-ring 11, and the intermediate body 12 and the lower body 16 are sealed by a gasket 13. The angle bracket 17 is installed on the upper part of the valve head 5 in the upper cover 8, mainly limiting the valve head 5. The upper end of the spring 7 is on the angle bracket 17, and the lower end is connected to the valve head 5. The upper cover 8 The joint at the top for connecting the external pipeline is provided with a gasket 9 on the inside and a fastening ring 10 on the outside. When working, the upper part of the device is directly connected to the lower end of the oil extraction pipe of the oil unloading station, sealed by the gasket 9 and fixed by the fastening ring 10. When the whole device is inserted into the kerosene tank with the oil extraction pipe, the buoy 3 floats upward due to the buoyancy. At the same time, the chain rope 2 pulls the float 14 to sink, and the oil port in the lower body 16 is opened. After the oil pump works, the valve head 5 in the device is sucked up by the negative pressure, and the oil path in the device is unblocked; when the tank After the kerosene inside is pumped to the bottom, the float 3 sinks while the chain rope 2 is relaxed, and the float ball 14 floats up until the inner channel is blocked, and the oil pumping pipe stops pumping oil. The spring 7 can accelerate the sinking of the valve head 5. The valve head 5 sinks faster due to the combined action of the spring and gravity, and also accelerates the blocking of the reflux channel of the oil pumping pipe; when all the oil pumping pipes stop pumping oil and the oil pump output pressure is zero, the pump can be stopped and all the oil pumping pipes can be drawn out of the tank. At this time, the oil pumping pipe has a double seal device, and the kerosene in the pipe will not leak due to stopping the pump.

Claims

1. An automatic oil unloading device for aviation kerosene tanker, characterized in that: It includes a pulley block, a chain rope, a buoy, a valve head, an upper cover, an intermediate body, a floating ball, a ball holder and a lower body, wherein the pulley block is installed on the lower body, the chain rope passes through one end of the pulley block and is connected to the floating ball outside the lower body, and the other end is connected to the bottom of the floating ball, the valve head is placed between the upper cover and the intermediate body, the upper cover is connected to the intermediate body, the intermediate body is connected to the lower body through threads, the floating ball is installed in the lower body, and the ball holder is arranged at the lower part of the floating ball to limit the floating ball from separating from the lower body; When the whole device is inserted into the kerosene tank along with the oil extraction pipe, the float floats upward due to the buoyancy. At the same time, the chain rope pulls the float ball down, and the oil port in the lower body is opened. After the oil pump works, the valve head in the device is sucked up by the negative pressure, and the oil path in the device is unblocked. When the kerosene in the tank is pumped to the bottom, the float sinks, the chain rope is loosened, and the float ball floats up until the inner channel is blocked. The oil extraction pipe stops pumping oil, and the valve head sinks due to the action of gravity, which also blocks the channel for the return flow of the oil extraction pipe. An angle bracket is installed on the upper part of the valve head in the upper cover, and a spring is connected between the angle bracket and the valve head; A sealing ring is installed between the valve head and the intermediate body; The upper cover and the intermediate body are sealed by an O-type sealing ring.

2. The automatic oil unloading device for aviation kerosene tanker according to claim 1 is characterized in that: The intermediate body and the lower body are sealed by a gasket.

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