An oil vapor recovery system for improving loading and unloading safety of an oil tank truck

Abstract

The application provides an oil vapor recovery system for improving loading and unloading safety of an oil tank truck, which comprises an oil vapor recovery valve, a side plate vent valve, an oil vapor recovery joint, an oil unloading valve and an emergency cut-off valve; the oil vapor recovery valve, the side plate vent valve, the oil vapor recovery joint, the oil unloading valve and the emergency cut-off valve are connected to the same control gas pipe. The application has the beneficial effect that the oil vapor recovery system for improving loading and unloading safety of an oil tank truck avoids the situation that the emergency cut-off valve and the oil unloading valve are opened for oil unloading operation when the oil vapor recovery joint is not connected due to human operation errors, and effectively prevents the oil tank from being "sucked flat".

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automobile parts, in particular to an oil vapor recovery system for improving the loading and unloading safety of an oil tank truck. BACKGROUND

[0002] Oil vapor recovery is an energy-saving and environment-friendly high-tech technology. By using oil vapor recovery technology, oil vapor emitted during the storage and transportation of oil products can be recovered, which can prevent air pollution caused by oil vapor evaporation, improve the utilization rate of energy, and thus reduce economic losses and create considerable economic benefits. As the main road transportation tool for oil transportation, the oil tank truck can effectively reduce the volatile harmful substances and eliminate the major safety hazards around the oil products after the oil vapor recovery device is installed. The pollution to the environment and the waste of energy are reduced.

[0003] When the oil tank truck is loading and unloading oil, the oil vapor recovery joint and the oil unloading valve are opened at the same time, and then the seabed valve is opened to normally load and unload oil. However, if the oil vapor recovery joint is forgotten to open or the oil unloading valve and the seabed valve are opened without opening the oil vapor recovery joint due to other reasons, at this time, although the oil in the tank body is unloaded to the oil depot buried in the ground through its own gravity, the gas in the oil depot cannot enter the tank body of the oil tank truck through the oil vapor recovery joint. At this time, the pressure in the tank body is reduced, and if no effective measures are taken, the tank body will be crushed by the external atmospheric pressure due to the continuous reduction of the internal pressure. In another case, if the oil unloading valve is not connected well and the seabed valve is opened, it will also cause the oil in the tank body to flow out through the oil unloading valve, causing a safety accident. SUMMARY

[0004] Therefore, the present application aims to provide an oil vapor recovery system for improving the loading and unloading safety of an oil tank truck.

[0005] To achieve the above-mentioned purposes, the technical scheme of the present application is as follows:

[0006] An oil vapor recovery system for improving the loading and unloading safety of an oil tank truck, comprising an oil vapor recovery valve, a side plate breather valve, an oil vapor recovery joint, an oil unloading valve, and an emergency shut-off valve.

[0007] The oil vapor recovery valve, the side plate breather valve, the oil vapor recovery joint, the oil unloading valve, and the emergency shut-off valve are connected to the same control gas pipe.

[0008] Further, the oil vapor recovery valve and the emergency shut-off valve are pneumatic control valves,

[0009] The control gas source flows into the oil gas recovery valve from the gas inlet, flows out from the gas outlet, flows into the edge plate vent valve from the control gas source interface, flows into the oil gas recovery joint from the gas inlet, flows out from the gas outlet, flows into the oil unloading valve from the gas inlet, flows out from the gas outlet, and finally flows into the emergency shut-off valve from the control gas source interface.

[0010] Further, the oil gas recovery valve is arranged at the top of the tank of the oil tank truck, and the emergency shut-off valve is arranged at the bottom of the tank of the oil tank truck.

[0011] Further, the edge plate vent valve is arranged on the connecting pipeline between the oil gas recovery valve and the oil gas recovery joint.

[0012] Further, the edge plate vent valve is a normally open valve, and the valve is closed by the valve flap opened by the gas pressure.

[0013] Further, the oil gas recovery valve and the emergency shut-off valve are normally closed pneumatic opening valves, and the valves are opened by the valve flap opened by the gas pressure.

[0014] Further, the oil gas recovery valve and the edge plate vent valve are self-locked.

[0015] Further, the oil gas recovery joint and the oil unloading valve are provided with travel switches.

[0016] Compared with the prior art, the oil gas recovery system for improving the loading and unloading safety of the oil tank truck has the following beneficial effects:

[0017] (1) The oil gas recovery system for improving the loading and unloading safety of the oil tank truck avoids the situation that the emergency shut-off valve and the oil unloading valve are opened for oil unloading operation when the oil gas recovery joint is not connected due to human operation errors, and effectively prevents the oil tank from being "sucked flat".

[0018] (2) The oil gas recovery system for improving the loading and unloading safety of the oil tank truck avoids the situation that the oil unloading valve and the emergency shut-off valve are opened when the oil unloading pipeline is not connected due to human operation errors, and effectively prevents oil spilling accidents. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application, and do not constitute improper limitations on the present application. In the drawings:

[0020] Figure 1 A schematic view of the oil gas recovery system for improving the loading and unloading safety of the oil tank truck is shown.

[0021] Explanation of reference signs:

[0022] 1 - oil vapor recovery valve; 2 - side plate vent valve; 3 - oil vapor recovery joint; 4 - oil unloading valve; 5 - emergency cut-off valve; 6 - gas source; 7 - control gas pipe; 8 - gas source interface; 9 - travel switch. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0025] When the oil tank truck loads and unloads oil, the oil is injected from the tank truck tank into the underground oil storage tank, and the pressure in the tank truck tank decreases, so it needs to be filled with an equal volume of gas. The underground oil storage tank will also discharge an equal volume of oil gas due to the injection of a certain volume of oil, so the oil gas discharged from the underground oil storage tank can be recovered through the pipeline and returned to the oil tank truck, realizing the closed cycle recovery of oil gas during unloading.

[0026] The oil vapor recovery valve 1 and the emergency cut-off valve 5 are both normally closed pneumatic opening valves, and the valve flap is controlled by gas pressure to open the valve. The side plate vent valve 2 is a normally open valve, and the valve flap is controlled by gas pressure to close the valve. When loading and unloading oil, the oil vapor recovery valve 1 and the emergency cut-off valve 5 are opened, and the side plate vent valve 2 is closed, and the oil gas circulates between the tank truck tank and the underground tank.

[0027] As shown in Figure 1 The present application proposes a self-locking method for an oil vapor recovery assembly, which connects the oil vapor recovery valve 1, the side plate vent valve 2, the oil vapor recovery joint 3, the oil unloading valve 4 and the emergency cut-off valve 5 in series through a gas pipe. The oil vapor recovery valve 1 and the side plate vent valve 2 are self-locked. The oil vapor recovery valve 1 is a normally closed valve, and the side plate vent valve 2 is a normally open valve.

[0028] After venting, the oil vapor recovery valve 1 is opened and the side plate vent valve 2 is closed. At this time, the gas pipe from the side plate vent valve 2 is connected to the oil vapor recovery joint 3 and the oil unloading valve 4 in sequence, and finally connected to the emergency cut-off valve 5 through the oil unloading valve 4. The oil vapor recovery joint 3 and the oil unloading valve 4 are provided with travel switches 9. When the oil vapor recovery joint 3 and the oil unloading valve 4 are connected to the pipeline, the travel switches 9 are opened by the connecting pipeline, and the oil vapor recovery joint 3 and the oil unloading valve 4 are opened at the same time, and the entire gas path is connected, the gas pressure is connected to the emergency cut-off valve 5, and the emergency cut-off valve 5 is opened. The entire oil vapor recovery system starts to work.

[0029] This self-locking method of the oil vapor recovery assembly ensures that the emergency cut-off valve 5 can only be opened when the oil vapor recovery joint 3 and the oil unloading valve 4 are both connected.

[0030] It should be noted that the oil gas recovery valve 1, the side plate vent valve 2, the oil gas recovery joint 3, the oil unloading valve 4 and the emergency shut-off valve 5 mentioned in the scheme all adopt the prior art, the opening and closing of the existing components is independent, and there is no coupling association between them. The scheme realizes unified control of the above components through the same gas pipe, and can be realized without improving the structure of the existing components, and only needs to use a gas pipe in series.

[0031] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application.

[0032] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An oil vapor recovery system that improves the safety of loading and unloading an oil tank truck, characterized by: The oil gas recovery valve (1), the side plate vent valve (2), the oil gas recovery joint (3), the oil unloading valve (4) and the emergency cut-off valve (5) are connected to the same control gas pipe (7). The oil gas recovery valve (1) and the emergency cut-off valve (5) are pneumatic control valves, and the control gas source (6) flows in from the gas inlet of the oil gas recovery valve (1), the gas outlet of the oil gas recovery valve (1), the control gas source (6) interface of the side plate vent valve (2), the gas inlet of the oil gas recovery joint (3), the gas outlet of the oil gas recovery joint (3), the gas inlet of the oil unloading valve (4), the gas outlet of the oil unloading valve (4) and finally the control gas source (6) interface of the emergency cut-off valve (5) in sequence. The side plate vent valve (2) is a normally open valve, and the valve is closed by the pressure of the valve flap. The oil gas recovery valve (1) and the emergency cut-off valve (5) are normally closed pneumatic opening valves, and the valves are opened by the pressure of the valve flap. The oil gas recovery valve (1) and the side plate vent valve (2) are self-locking. The oil gas recovery valve and the emergency cut-off valve are normally closed pneumatic opening valves, and the valves are opened by the pressure of the valve flap, and the side plate vent valve is a normally open valve, and the valve is closed by the pressure of the valve flap. When loading and unloading oil, the oil gas recovery valve and the emergency cut-off valve are opened, and the side plate vent valve is closed, and the oil gas circulates between the tank body of the oil tank truck and the underground tank. After venting, the oil gas recovery valve is opened, and the side plate vent valve is closed, and at this time, the gas pipe from the side plate vent valve is connected to the oil gas recovery joint and the oil unloading valve in sequence, and finally connected to the emergency cut-off valve through the oil unloading valve, and the oil gas recovery joint and the oil unloading valve are provided with travel switches, and when the oil gas recovery joint and the oil unloading valve are connected to the pipeline, the travel switches are opened by the pipeline, and the oil gas recovery joint and the oil unloading valve are opened at the same time, and the whole gas circuit is connected, and the pressure is connected to the emergency cut-off valve, and the emergency cut-off valve is opened.

2. The oil vapor recovery system of claim 1, wherein: The oil gas recovery valve (1) is arranged at the top of the tank body of the oil tank truck, the emergency cut-off valve (5) is arranged at the bottom of the tank body of the oil tank truck, and the oil unloading valve (4) and the oil gas recovery joint (3) are connected to the pipeline of the underground oil storage tank.

3. The oil vapor recovery system of claim 2, wherein: The side plate vent valve (2) is arranged on the connecting pipeline between the oil gas recovery valve (1) and the oil gas recovery joint (3).

4. The oil vapor recovery system of claim 1, wherein: The oil gas recovery joint (3) and the oil unloading valve (4) are provided with travel switches (9).

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