Oil-gas separator, oil tank and oil-gas separation system
By installing an extension pipe inside the oil-gas separator housing, the fluid flow path and velocity are affected, achieving efficient oil-gas separation. This solves the problem of liquid entering the carbon canister in existing technologies and reduces the cost of the oil tank system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YAPP AUTOMOTIVE PARTS
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-17
AI Technical Summary
The existing oil-gas separator has insufficient oil-gas separation efficiency, which causes liquid to enter the carbon canister. Therefore, it is necessary to add a liquid capture device to protect the carbon canister, which increases the cost of the oil tank system.
An extension tube is installed inside the shell of the oil-gas separator. The uneven flow resistance affects the fluid flow path and velocity, causing the liquid to condense and separate on the wall of the extension tube, thereby improving the separation efficiency and reducing the possibility of liquid entering the carbon canister.
It improves oil-gas separation efficiency, reduces the need for liquid capture devices, and lowers the cost of the oil tank system.
Smart Images
Figure CN224130882U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of oil-gas separation, and more specifically, to an oil-gas separator, an oil tank, and an oil-gas separation system. Background Technology
[0002] During the use of the fuel tank, an oil-gas separator (LVS) is required to separate the oil-gas mixture discharged from the fuel tank and release the separated gas into the carbon canister to prevent the liquid in the oil-gas mixture from damaging the carbon canister.
[0003] Existing oil-gas separators suffer from insufficient oil-gas separation efficiency, allowing a small amount of liquid to still enter the carbon canister during vehicle operation. To prevent liquid from entering the carbon canister, a liquid trapping device needs to be added before the carbon canister, which increases the cost of the fuel tank system.
[0004] Therefore, how to provide an oil-gas separator with high oil-gas separation efficiency has become a technical problem that urgently needs to be solved in this field. Utility Model Content
[0005] One objective of this invention is to provide a new technology solution for an oil-gas separator that has high oil-gas separation efficiency, reduces the use of liquid trapping devices, and lowers the cost of the oil tank system.
[0006] According to a first aspect of the present invention, an oil-gas separator is provided.
[0007] The oil-gas separator includes a housing and at least one extension pipe. The housing contains a first separation chamber and a second separation chamber separated from each other. The housing also has a first vent pipe connection port, a second vent pipe connection port, and a filling pipe connection port.
[0008] The first vent pipe connection port is connected to one end of the first separation chamber, the second vent pipe connection port is connected to one end of the second separation chamber, and the filling pipe connection port is connected to the other ends of the first separation chamber and the second separation chamber.
[0009] The extension tube extends from the first vent tube connection port and / or from the second vent tube connection port toward the filling tube connection port.
[0010] Optionally, there is a preset distance between the extension tube and the inner wall of the housing.
[0011] Optionally, the inner surface cross-sectional area of the extension tube is 40-100 mm². 2 The length of the extension tube is 35-55mm.
[0012] Optionally, the extension tube has a circular or elliptical cross-section.
[0013] Optionally, the oil-gas separator includes a first extension pipe and a second extension pipe, the first extension pipe extending from the first vent pipe connection port toward the filling pipe connection port, and the second extension pipe extending from the second vent pipe connection port toward the filling pipe connection port.
[0014] Optionally, the size of the second extension tube is smaller than the size of the first extension tube.
[0015] Optionally, the oil-gas separator further includes a cover plate configured to close or open an opening at the other end of the second separation chamber.
[0016] According to a second aspect of the present invention, an oil tank is provided.
[0017] The fuel tank includes a fuel tank body, a filling pipe, and an oil-gas separator of this utility model. The filling pipe is connected to the oil inlet of the fuel tank body, and an oil-gas separation port is provided on the side of the filling pipe away from the oil inlet. The filling pipe connection port is connected to the oil-gas separation port.
[0018] According to a third aspect of this utility model, an oil-gas separation system is provided.
[0019] The oil-gas separation system includes a carbon canister and an oil tank of this invention. The first vent pipe connection port is connected to the vent interface of the oil tank body via a pipe, and the second vent pipe connection port is connected to the carbon canister via a pipe.
[0020] Optionally, the oil-gas separation system further includes an oil tank isolation valve, which is disposed between the carbon canister and the second vent pipe connection port, and the carbon canister, the oil tank isolation valve and the second vent pipe connection port are connected by a pipeline.
[0021] The oil-gas separator provided by this utility model generates uneven flow resistance in the shell by setting an extension tube inside the shell. By affecting the fluid flow path and flow rate, the liquid in the oil-gas mixture can be condensed and separated on the wall of the extension tube, which greatly improves the separation efficiency of the oil-gas separator. This reduces the need for liquid capture devices and effectively lowers the cost of the oil tank system.
[0022] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description
[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.
[0024] Figure 1This is a schematic diagram of the structure of an embodiment of the oil-gas separator of this utility model.
[0025] The diagram is labeled as follows: housing-1, first separation chamber-11, second separation chamber-12, first vent pipe connection port-13, second vent pipe connection port-14, filling pipe connection port-15, first extension pipe-2, second extension pipe-3. Detailed Implementation
[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.
[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0029] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0030] like Figure 1 As shown, the oil-gas separator provided by this utility model includes a housing 1 and at least one extension pipe. The housing 1 has a first separation chamber 11 and a second separation chamber 12 separated from each other, and the housing 1 is provided with a first vent pipe connection port 13, a second vent pipe connection port 14, and a filling pipe connection port 15. The first separation chamber 11 can be connected to the fuel tank through the first vent pipe connection port 13 to receive the oil-gas mixture from the fuel tank. The second separation chamber 12 can be connected to the carbon canister through the second vent pipe connection port 14 to discharge the gas separated from the oil-gas mixture into the carbon canister. In specific implementations, the first vent pipe connection port 13 and / or the second vent pipe connection port 14 can be configured as tubular interfaces extending outward from the housing 1. The filling pipe connection port 15 can be connected to the fuel tank filling pipe to discharge the liquid separated from the oil-gas mixture into the fuel tank filling pipe.
[0031] The aforementioned extension pipe refers to a tubular structure installed within the housing 1, extending from either the first vent pipe connection port 13 or the second vent pipe connection port 14 towards the filling pipe connection port 15. After the oil-gas mixture enters the extension pipe, the liquid in the mixture can condense and separate on the extension pipe wall. The extension pipe can influence the flow path and velocity of the fluid within the oil-gas separator.
[0032] The first vent pipe connection port 13 is connected to one end of the first separation chamber 11. The second vent pipe connection port 14 is connected to one end of the second separation chamber 12. The filling pipe connection port 15 is connected to the other end of the first separation chamber 11 and the second separation chamber 12. Fluid can flow between the first vent pipe connection port 13, the filling pipe connection port 15, and the second vent pipe connection port 14.
[0033] The extension tube extends from the first vent tube connection port 13 and / or from the second vent tube connection port 14 toward the filling tube connection port 15.
[0034] Depending on the specific needs, oil-gas separators can have different numbers of extension tubes.
[0035] For example, the oil-gas separator may consist only of an extension pipe extending from the first vent pipe connection 13 toward the filling pipe connection 15. In this case, the oil-gas mixture enters the extension pipe from the first vent pipe connection 13, and liquid-gas separation is completed within the extension pipe. The liquid can drip along the extension pipe from the filling pipe connection 15 into the fuel tank filling pipe, and the gas can leave the oil-gas separator along the flow direction of extension pipe → filling pipe connection 15 → second separation chamber 12 → second vent pipe connection 14.
[0036] For example, the oil-gas separator may consist only of an extension pipe extending from the second vent pipe connection 14 toward the filling pipe connection 15. In this case, the oil-gas mixture enters the first separation chamber 11 from the first vent pipe connection 13, where liquid-gas separation is completed. The liquid can drip from the filling pipe connection 15 into the fuel tank filling pipe along the first separation chamber 11, while the gas can leave the oil-gas separator along the flow direction of first separation chamber 11 → filling pipe connection 15 → extension pipe → second vent pipe connection 14.
[0037] For example, the oil-gas separator may simultaneously include an extension pipe (which may be referred to as the first extension pipe 2) extending from the first vent pipe connection port 13 toward the filling pipe connection port 15 and an extension pipe (which may be referred to as the second extension pipe 3) extending from the second vent pipe connection port 14 toward the filling pipe connection port 15. In this case, the oil-gas mixture enters the first extension pipe 2 from the first vent pipe connection port 13, and liquid-gas separation is completed in the first extension pipe 2. The liquid can drip along the first extension pipe 2 from the filling pipe connection port 15 into the oil tank filling pipe, and the gas can leave the oil-gas separator along the flow direction of first extension pipe 2 → filling pipe connection port 15 → second extension pipe 3 → second vent pipe connection port 14.
[0038] The oil-gas separator provided by this utility model generates uneven flow resistance in the housing 1 by setting an extension tube inside the housing 1. By affecting the fluid flow path and flow rate, the liquid in the oil-gas mixture can be condensed and separated on the wall of the extension tube, which greatly improves the separation efficiency of the oil-gas separator. This reduces the need for liquid capture devices and effectively lowers the cost of the oil tank system.
[0039] The oil-gas separator of this invention is advantageous for separating oil-gas mixtures in a short time, thereby effectively avoiding the problem of liquid contamination of the carbon canister caused by a sudden large amount of exhaust.
[0040] In one embodiment of the oil-gas separator of this utility model, a preset distance is provided between the extension pipe and the inner wall of the housing 1. By setting a preset distance between the extension pipe and the inner wall of the housing 1, a labyrinthine oil-gas separation space can be formed within the housing 1. The space formed by the inner wall of the extension pipe and the space formed between the outer wall of the extension pipe and the inner wall of the housing 1 can all be used for oil-gas separation. This arrangement is beneficial for forming an asymmetric oil-gas separation space within the housing 1, generating more uneven flow resistance, thereby increasing the influence on the fluid flow path and velocity, and greatly improving the separation efficiency of the oil-gas separator.
[0041] In one embodiment of the oil-gas separator of this utility model, the inner surface cross-sectional area of the extension tube is 40-100 mm². 2 The extension tube should be 35-55mm long. These parameter settings help maximize the separation efficiency of the oil-gas separator.
[0042] In one embodiment of the oil-gas separator of this utility model, in order to improve the oil-gas separation efficiency, the extension tube has a circular or elliptical cross-section.
[0043] In one embodiment of the oil-gas separator of this utility model, the oil-gas separator includes a first extension pipe 2 and a second extension pipe 3. The first extension pipe 2 extends from the first vent pipe connection port 13 toward the filling pipe connection port 15, and the second extension pipe 3 extends from the second vent pipe connection port 14 toward the filling pipe connection port 15. The arrangement of the two extension pipes can form more oil-gas separation space within the housing 1, thereby more effectively improving the separation efficiency of the oil-gas separator.
[0044] Furthermore, the second extension tube 3 is smaller than the first extension tube 2, so that the oil-gas mixture stays in the housing 1 for a longer time, thereby more fully separating the oil-gas mixture. The size of the second extension tube 3 being smaller than the size of the first extension tube 2 can be, for example, at least one of the following dimensional parameter relationships: the inner surface cross-sectional area of the second extension tube 3 is smaller than the inner surface cross-sectional area of the first extension tube 2, and the length of the second extension tube 3 is smaller than the length of the first extension tube 2.
[0045] In one embodiment of the oil-gas separator of this utility model, the oil-gas separator further includes a cover plate, which can be used to close or open the opening at the other end of the second separation chamber 12. The cover plate can close or open the second separation chamber 12 under different operating conditions, thereby controlling the operation of the oil-gas separator.
[0046] Specifically, during vehicle operation, the cover can open the other end of the second separation chamber 12, allowing the oil-gas mixture to enter the housing 1 through the first vent pipe connection 13. After passing through the first separation chamber 11 and the second separation chamber 12, the gas in the oil-gas mixture can exit the housing 1 through the second vent pipe connection 14. During vehicle refueling, the cover can be driven (by a fuel nozzle or electrically) to close the opening at the other end of the second separation chamber 12. The oil-gas mixture enters the housing 1 through the first vent pipe connection 13, and after passing through the first separation chamber 11, the gas in the oil-gas mixture can enter the fuel tank filling pipe through the filling pipe opening and exit the vehicle through the fuel tank filling pipe.
[0047] This utility model also provides an oil tank, which includes an oil tank body, a filling pipe, and the oil-gas separator of this application. The filling pipe is connected to the oil inlet of the oil tank body, and an oil-gas separation port is provided on the side of the filling pipe away from the oil inlet. The filling pipe connection port 15 is connected to the oil-gas separation port. The connection between the filling pipe connection port and the oil-gas separation port can be achieved by means of threaded connection, snap-fit connection, etc.
[0048] In practice, the oil-gas separation port can be set on one side of the filling port adjacent to the filling pipe, so that when the oil-gas separator with a cover is used, the cover can be controlled by the filling gun to close the opening at the other end of the second separation chamber 12.
[0049] This utility model also provides an oil-gas separation system, which includes a carbon canister and the oil tank of this application. The first vent pipe connection port 13 is connected to the vent interface of the oil tank body through a pipe, and the second vent pipe connection port 14 is connected to the carbon canister through a pipe.
[0050] The oil-gas separation system of this utility model can separate the oil-gas mixture that enters the oil-gas separator from the vent of the oil tank body, so that the gas in the oil-gas mixture enters the carbon canister through the second vent pipe connection port 14, and the liquid in the oil-gas mixture flows back to the oil tank body through the filling pipe.
[0051] In one embodiment of the oil-gas separation system of this utility model, the oil-gas separation system further includes a fuel tank isolation valve (FTIV). The fuel tank isolation valve is located between the carbon canister and the second vent pipe connection port 14, and the carbon canister, the fuel tank isolation valve, and the second vent pipe connection port 14 are connected by a pipeline. The fuel tank isolation valve helps to better protect the carbon canister.
[0052] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.
Claims
1. An oil and gas separator characterized by, It includes a housing and at least one extension tube. The housing contains a first separation chamber and a second separation chamber separated from each other. The housing also has a first vent pipe connection port, a second vent pipe connection port, and a filling pipe connection port. The first vent pipe connection port is connected to one end of the first separation chamber, the second vent pipe connection port is connected to one end of the second separation chamber, and the filling pipe connection port is connected to the other ends of the first separation chamber and the second separation chamber. The extension tube extends from the first vent tube connection port and / or from the second vent tube connection port toward the filling tube connection port.
2. The oil and gas separator of claim 1, wherein, There is a predetermined distance between the extension tube and the inner wall of the housing.
3. The oil and gas separator of claim 1, wherein, The inner surface cross-sectional area of the extension tube is 40-100 mm 2 The length of the extension tube is 35-55 mm.
4. The oil and gas separator of claim 1, wherein, The extension tube has a circular or elliptical cross-section.
5. The oil and gas separator of claim 1, wherein, The oil-gas separator includes a first extension pipe and a second extension pipe. The first extension pipe extends from the first vent pipe connection port toward the filling pipe connection port, and the second extension pipe extends from the second vent pipe connection port toward the filling pipe connection port.
6. The oil and gas separator of claim 5, wherein, The size of the second extension tube is smaller than the size of the first extension tube.
7. The oil and gas separator of claim 1, wherein, The oil-gas separator also includes a cover plate, which is configured to close or open an opening at the other end of the second separation chamber.
8. An oil tank characterized by comprising: The device includes a fuel tank body, a filling pipe, and an oil-gas separator according to any one of claims 1 to 7, wherein the filling pipe is connected to the oil inlet of the fuel tank body, an oil-gas separation port is provided on the side of the filling pipe away from the oil inlet, and the filling pipe connection port is connected to the oil-gas separation port.
9. A gas-oil separation system characterized by, The system includes a carbon canister and the fuel tank as described in claim 8, wherein the first vent pipe connection port is connected to the vent interface of the fuel tank body via a pipe, and the second vent pipe connection port is connected to the carbon canister via a pipe.
10. The oil and gas separation system of claim 9, wherein, The oil-gas separation system also includes an oil tank isolation valve, which is located between the carbon canister and the second vent pipe connection port, and the carbon canister, the oil tank isolation valve and the second vent pipe connection port are connected by a pipeline.