Oil tank connecting pipe assembly and multifunctional valve

Abstract

The utility model provides an oil tank connecting pipe assembly and a multifunctional valve, and relates to the technical field of automobile accessories, the oil tank connecting pipe assembly comprises an oil tank flange and a shell, the oil tank flange is an oil tank sealing piece and is used for being installed on an oil tank and sealing a corresponding opening of the oil tank, and the oil tank flange is provided with an internal face and an external face; the shell is fixed with the oil tank flange, the shell penetrates through the oil tank flange and extends to the built-in surface and the external surface, an airflow channel and a built-in joint communicated with the airflow channel are arranged on the shell, and the built-in joint is located on the built-in surface. According to the oil tank connecting pipe assembly and the multifunctional valve, the oil tank flange is arranged, the oil tank ventilation pipe is integrated on the same airflow channel, the built-in connector connected with the rollover valve is arranged in the oil tank, the rollover valve is directly connected with the ventilation pipe from the interior of the oil tank, and extra chassis space does not need to be occupied; and a rollover valve pipeline can be effectively protected in the oil tank and is not easily influenced by external environmental factors.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile accessories, especially to an oil tank connecting pipe assembly and a multifunctional valve. BACKGROUND

[0002] A roll-over valve is a device designed to enhance vehicle safety, preventing fuel leakage when the vehicle rolls over. It is usually installed between the fuel tank and the fuel system, allowing free fuel flow during normal driving, but automatically closing when the vehicle tilts or rolls to prevent fuel leakage and fire risk. The structure of the valve mainly includes a valve body, a floating ball or piston assembly, and a sealing element. For example, the roll-over valve with announcement number CN201538232U works by sensing the vehicle state through changes in gravity or buoyancy. When the vehicle reaches a certain tilt angle, the floating ball or piston assembly will quickly move to the closed position, cutting off the oil circuit, effectively preventing fuel overflow. The roll-over valve has high sensitivity and can respond quickly in the event of vehicle rollover or collision. It is an indispensable safety component in modern automobile fuel systems, providing an additional layer of safety for driving.

[0003] In a flat fuel tank, roll-over valves are usually installed at multiple key positions of the fuel tank (such as the front, rear, or left and right sides of the fuel tank), and each roll-over valve needs to be connected to an air pipe. This arrangement results in more external pipe layout for the fuel tank. For hybrid vehicles with limited chassis space, the form and number of connecting pipes directly affect the fuel tank capacity. Additionally, the connecting pipes arranged outside the fuel tank are easily affected by external environmental factors, such as mechanical impact caused by vibration during vehicle driving, road stone impact, rain and dust corrosion, which adversely affect the service life and stability of the roll-over valve. SUMMARY

[0004] Therefore, the utility model provides an oil tank connecting pipe assembly and a multifunctional valve. By setting an oil tank flange, the oil tank air pipe is integrated on the same airflow channel, and the built-in connector connecting the roll-over valve is located inside the oil tank. This allows the roll-over valve to be directly connected to the air pipe from the inside of the oil tank without occupying additional chassis space. Additionally, the roll-over valve pipe is effectively protected in the oil tank by the connecting pipe assembly, reducing the impact of external environmental factors.

[0005] The technical solution of the utility model is as follows:

[0006] On the one hand, the utility model provides an oil tank connecting pipe assembly and a multifunctional valve, including an oil tank flange and a shell, wherein,

[0007] The oil tank flange is a sealing element for the oil tank, used to install on the oil tank and seal the corresponding opening of the oil tank. The oil tank flange is provided with an internal surface and an external surface.

[0008] The shell is fixed to the oil tank flange, and the shell passes through the oil tank flange and extends to the inner surface and the outer surface. The shell is provided with an air flow channel and an inner joint communicating with the air flow channel, and the inner joint is located on the inner surface.

[0009] On the basis of the above technical solution, preferably, the shell further includes an external connector, which is arranged on the external surface and communicates with the air flow channel, and the external connector faces the valve port.

[0010] Further preferably, the external joint is one of a convex joint, a bamboo joint and a plunger joint.

[0011] On the basis of the above technical solution, preferably, the built-in joint is one of a convex joint, a bamboo joint and a plunger joint.

[0012] On the basis of the above technical solution, preferably, a through opening is opened on the shell on the same side as the built-in surface, and the through opening is used to connect the air flow channel and the oil tank.

[0013] Further preferably, it also includes a refueling limiting mechanism, which is arranged on the shell and located outside the through port. The through port is connected to the fuel tank through the refueling limiting mechanism, and the refueling limiting mechanism is used to prevent the fuel tank from overflowing due to over-refueling.

[0014] More preferably, the refueling restriction mechanism includes a housing assembly and a floating member, wherein:

[0015] The housing assembly is fixed on the shell and is located outside the through opening. The housing assembly is provided with an oil inlet and an oil filter hole.

[0016] The floating member is movably arranged in the housing component and is located outside the oil filter hole. The floating member can float toward the through port through the fuel entering the oil filter hole until the through port is blocked.

[0017] More preferably, the housing assembly comprises a cylindrical shell and a cover, wherein:

[0018] The cylindrical shell is fixedly connected to the housing and is located outside the through opening. The side of the cylindrical shell away from the housing is open, and the oil inlet is opened on the cylindrical shell.

[0019] The sealing cover is buckled on the opening side of the cylindrical shell, and the oil filter hole is opened on the sealing cover.

[0020] On the other hand, the utility model provides a multifunctional valve, including a valve body and the above-mentioned oil tank pipe assembly, wherein the valve body is fixed integrally to the shell and is located on the external surface, and the valve port of the valve body is connected to the air flow channel.

[0021] The fuel tank pipe assembly and multifunctional valve of the present invention have the following beneficial effects compared with the prior art:

[0022] (1) By providing a fuel tank flange, the fuel tank vent pipe is integrated into the same air flow channel, and the built-in connector for connecting the rollover valve is provided inside the fuel tank, so that the rollover valve can be directly connected to the vent pipe from inside the fuel tank without occupying additional chassis space. In addition, through the pipe assembly, the rollover valve pipeline can be effectively protected in the fuel tank and is not easily affected by external environmental factors;

[0023] (2) The built-in connector can be directly connected to the rollover valve and pipeline inside the fuel tank. The pipeline connection is performed through the inside of the fuel tank, thereby optimizing the pipeline structure and avoiding the space occupation caused by the pipeline connection from the outside of the fuel tank. It also reduces the difficulty of optimizing the fuel tank space. That is, there is no need to consider the connection pipeline problem of the rollover valve during the design optimization process. At the same time, it also improves the integration of the flat fuel tank. After the built-in connector is connected to the rollover valve and pipeline inside the fuel tank, the vehicle can be protected from rollover to prevent fuel leakage to the outside and reduce the risk of fire. Or when the vehicle is tilted, rolled over or violently vibrated, the valve will close quickly to avoid fuel leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a three-dimensional diagram of the fuel tank pipe assembly of the present invention;

[0026] Figure 2 It is a side view of the fuel tank connecting pipe assembly of the present utility model;

[0027] Figure 3 for Figure 2 Cross-sectional view at AA in the middle;

[0028] Figure 4 This is a schematic diagram of the internal structure of the multifunctional valve refueling restriction mechanism of the present invention;

[0029] Figure 5 This is an example diagram of a multifunctional valve of the present utility model using a bamboo joint joint;

[0030] Figure 6 This is an example diagram of a multifunctional valve of the present utility model using a convex joint. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-4 As shown, the fuel tank connecting pipe assembly of the present invention includes a fuel tank flange 1 and a shell 3.

[0033] The fuel tank flange 1 is a fuel tank sealing part, which is used to be installed on the fuel tank and seal the corresponding opening of the fuel tank. The fuel tank flange 1 is provided with an inner surface 101 and an outer surface 102. A limit ring is provided on one side of the fuel tank flange 1 for aligning with the fuel tank opening and inserting the fuel tank. The other side is a flat surface for integrating external components of the fuel tank. The material of the fuel tank flange 1 can be selected from plastic. When the fuel tank flange 1 is fixed to the fuel tank, a sealing ring can be provided to seal the edge part. After the fuel tank flange 1 is set on the fuel tank, the side facing the inside of the fuel tank is the inner surface 101, and the side located outside the fuel tank is the outer surface 102. The settings of the inner surface 101 and the outer surface 102 can be used to respectively integrate internal and external components or interfaces of the fuel tank.

[0034] The shell 3 is fixed to the oil tank flange 1. The shell 3 passes through the oil tank flange 1 and extends to the inner surface 101 and the outer surface 102. The shell 3 is arranged on the outside of the valve body 2 and forms an air flow channel 301 connecting the valve port and the oil tank. The shell 3 is provided with a built-in joint 31 connecting the air flow channel 301, and the built-in joint 31 is located on the inner surface 101.

[0035] The built-in connector 31 can be directly connected to the rollover valve and pipeline inside the fuel tank, and the pipeline connection is performed through the inside of the fuel tank, thereby realizing pipeline structure optimization, avoiding space occupation caused by pipeline connection from the outside of the fuel tank, and reducing the difficulty of optimizing the fuel tank space, that is, there is no need to consider the connection pipeline problem of the rollover valve during the design optimization process. At the same time, it also improves the integration of the flattened fuel tank. After the built-in connector 31 is connected to the rollover valve and pipeline inside the fuel tank, the vehicle can be protected from rollover to prevent fuel leakage to the outside, reducing the risk of fire, or when the vehicle is tilted, rolled over or violently vibrated, the valve will quickly close to avoid fuel leakage.

[0036] In addition, the shell 3 is integrated on the fuel tank flange 1, which further realizes the integrated setting of the valve body 2 and other components. Specifically, the external components of the fuel tank can be arranged on the part of the shell 1 located on the external surface 102, and the internal components of the fuel tank can be arranged on the part of the shell 1 located on the internal surface 101. When assembling the fuel tank, it is only necessary to install the fuel tank flange 1, and the components on the fuel tank flange 1 can be uniformly installed on the fuel tank, thereby reducing the chassis assembly process and difficulty.

[0037] As a preferred embodiment, the housing 3 further includes an external connector 32 , which is provided on the external surface 102 and communicates with the air flow channel 301 , and is directly opposite to the valve port.

[0038] The external connector 32 is used to detect the leakage of the LCO fuel pipe during OBD diagnosis. When the OBD diagnosis command turns on the electromagnet, the circulation pipe can be connected for diagnosis.

[0039] In this embodiment, the external joint 32 is one of a convex joint, a bamboo joint and a plunger joint, and correspondingly, the internal joint 31 is one of a convex joint, a bamboo joint and a plunger joint.

[0040] The external connector 32 and the internal connector 31 are both used to connect pipes and are not limited to their specific shapes and sizes. Figure 1 、 5 As shown in FIG6 , a plunger-type joint, a bamboo-type joint and a convex-type joint are respectively used as the external joint 32 and the internal joint 31 .

[0041] In this embodiment, in order to connect the air flow channel 301 on the shell 3 to the interior of the fuel tank to form an air supply and discharge air flow channel, a through hole is opened on the shell 3 on the same side as the built-in surface 101. The through hole is used to connect the air flow channel 301 with the fuel tank. That is, when the internal pressure of the fuel tank is negative, air can be introduced into the fuel tank through the through hole, and when the internal pressure of the fuel tank is positive, air can be discharged to the outside through the through hole.

[0042] As a preferred embodiment, it also includes a refueling limiting mechanism 4, which is arranged on the shell 3 and located outside the through port. The through port is connected to the fuel tank through the refueling limiting mechanism 4, and the refueling limiting mechanism 4 is used to prevent the fuel tank from overflowing due to over-refueling.

[0043] In the fuel tank, a mechanical FLVV valve is usually required to be separately provided to prevent the fuel tank from overflowing due to over-filling. However, this arrangement will result in a large number of separately installed components on the fuel tank, which is inconvenient to repair and maintain. Therefore, a refueling restriction mechanism 4 is integrated and provided. The refueling restriction mechanism 4 is integrated on the shell 3 and connected to the air flow channel 301. The port is connected to the fuel tank through the provided refueling restriction mechanism 4, so there is no need to separately provide an FLVV valve in the fuel tank, which further reduces the fuel tank assembly procedure and is more conducive to the design of the fuel tank space layout.

[0044] Specifically, the refueling limiting mechanism 4 includes a shell component 41, a floating component 42 and an elastic component 43. The shell component 41 is fixed to the shell body 3 and is located on the outside of the through-port. The shell component 41 is provided with an oil inlet 4101 and an oil filter hole 4102. The floating component 42 is movably arranged in the shell component 41. The floating component 42 is cylindrical and open on one side. The open side cover of the floating component 42 is arranged on the outside of the oil filter hole 4102. The floating component 42 can move toward the through-port and block the through-port. The two ends of the elastic component 43 are respectively arranged on the shell component 41 and the floating component 42, and are used to pull the floating component 42 away from the through-port.

[0045] When gasoline enters the inner cavity of the floating member 42 through the oil inlet 4101, the air inside the floating member 42 cannot be discharged, and the air density is lower than the gasoline density. As the oil level rises, the floating member 42 will be pushed upward until the floating member 42 closes the opening. At this time, the interior of the fuel tank is closed and no more oil can be added to the fuel tank. The elastic member 43 is preferably a spring. The elastic member 43 is arranged inside the floating member 42, and a protrusion for fixing the end of the elastic member 43 is provided on the outer shell assembly 41. The elastic member 43 has an elastic force to support the floating member 42, which is equivalent to a pre-upward force, and the floating member 42 is easily and sensitively floated with the buoyancy. If the elastic member 43 is not used, floating only by oil is very slow, and the force is too small and not sensitive. In addition, another function of the elastic member 43 is that when the vehicle tilts, the floating member 42 slides quickly under the action of the elastic member 43 to block the opening, preventing oil from accidentally entering the main valve body.

[0046] As a preferred embodiment, the outer shell assembly 41 includes a cylindrical shell 411 and a cover 412. The cylindrical shell 411 is fixedly connected to the shell body 3 and is located on the outside of the through opening. The cylindrical shell 411 is open on the side away from the shell body 3. The oil inlet 4101 is opened on the cylindrical shell 411. The cover 412 is snapped on the open side of the cylindrical shell 411. The oil filter hole 4102 is opened on the cover 412. The set oil filter hole 4102 can allow the oil at the bottom of the floating part 42 to leave the outer shell assembly 41 through the oil filter hole 4102 when the floating part 42 moves downward.

[0047] In this embodiment, a pair of columns 413 are provided in the housing assembly 41 , and a slide is formed between two adjacent columns 413 . The outer side of the floating member 42 is provided with a convex strip extending into the slide to guide the movement of the floating member 42 .

[0048] In order to prevent the floating part 42 from being unable to accurately block the opening during the floating process, a column 413 and a convex strip structure on the outside of the floating part 42 are set to guide the moving direction of the floating part 42, avoid it from being offset during the movement, causing its own function to be affected, and improve the stability of the structural part.

[0049] In addition, in order to further improve the reliability of the floating member 42 when sealing the through-hole, the refueling limiting mechanism 4 also includes a sealing gasket 44. A protrusion is provided on the top of the floating member 42, and the sealing gasket 44 is sleeved on the protrusion. The diameter of the protrusion is smaller than the inner diameter of the through-hole, and the outer diameter of the sealing gasket 44 is larger than the inner diameter of the through-hole. When sealing the through-hole, the sealing gasket 44 generates elastic deformation, thereby further improving the sealing effect.

[0050] like Figure 1-6 As shown, the multifunctional valve of the present invention includes a valve body 2 and the above-mentioned fuel tank pipe assembly. The valve body 2 is fixed to the shell 3 in an integral manner and is located on the external surface 102 . The valve port of the valve body 2 is connected to the air flow channel 301 .

[0051] The valve body 2 is fixed on the external surface 102 of the fuel tank flange 1. A valve port is provided on the valve body 2, and a valve core 21 is provided for opening and closing in cooperation with the valve port. The valve body 2 is the fuel tank isolation valve, which also includes an electromagnetic assembly. The valve core 21 of the valve body 2 can be opened when the positive pressure inside the fuel tank needs to be exhausted or the negative pressure needs to be inhaled, so as to allow gas to flow in or out. The electromagnetic assembly is used to control the opening of the valve core 21 to realize active fuel tank pressure balance control action. In this embodiment, the valve body 2 is entirely integrated on the external surface 102, which can avoid the need for the valve body 2 to be installed on the vehicle frame with a separate bracket, and at the same time can eliminate the pipeline connection between the valve body 2 and the fuel tank, which is more conducive to the optimized design and utilization of the chassis space.

[0052] It should be noted that the refueling restriction mechanism 4 mainly plays a mechanical auxiliary refueling restriction function. During the normal refueling process, refueling is mainly completed by the valve body 2, and the refueling restriction mechanism will not interfere with the active control of the valve body 2. However, when the oil level sensor or other sensors fail, or the signal transmission is interrupted, it is difficult for the valve body 2 to actively control according to the electrical signal. At this time, the refueling restriction mechanism 4 is a further guarantee for the function of the valve body 2, realizing mechanical refueling closure to prevent overflow after the fuel is full.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fuel tank pipe assembly, characterized in that: It comprises an oil tank flange (1) and a housing (3), wherein: The fuel tank flange (1) is a fuel tank sealing member used for being mounted on the fuel tank and sealing the corresponding opening of the fuel tank. The fuel tank flange (1) is provided with an inner surface (101) and an outer surface (102); The shell (3) is fixed to the oil tank flange (1), and the shell (3) penetrates the oil tank flange (1) and extends to the inner surface (101) and the outer surface (102). The shell (3) is provided with an air flow channel (301) and an inner joint (31) communicating with the air flow channel (301), and the inner joint (31) is located on the inner surface (101).

2. The fuel tank pipe assembly according to claim 1, characterized in that: The housing (3) further comprises an external connector (32), which is arranged on the external surface (102) and communicates with the air flow channel (301), and the external connector (32) faces the valve port.

3. The fuel tank pipe assembly according to claim 2, characterized in that: The external joint (32) is one of a convex joint, a bamboo joint and a plunger joint.

4. The fuel tank pipe assembly according to claim 1, characterized in that: The built-in joint (31) is one of a convex joint, a bamboo joint and a plunger joint.

5. The fuel tank pipe assembly according to claim 1, characterized in that: The housing (3) is provided with a through opening on the same side as the inner surface (101), and the through opening is used to connect the air flow channel (301) with the oil tank.

6. The fuel tank pipe assembly according to claim 5, characterized in that: It also includes a refueling restriction mechanism (4), which is arranged on the housing (3) and located outside the through port. The through port is connected to the oil tank through the refueling restriction mechanism (4). The refueling restriction mechanism (4) is used to prevent the oil tank from overflowing due to over-refueling.

7. The fuel tank pipe assembly according to claim 6, characterized in that: The refueling restriction mechanism (4) comprises a housing component (41) and a floating member (42), wherein: The housing component (41) is fixed on the housing (3) and is located outside the through opening. The housing component (41) is provided with an oil inlet (4101) and an oil filter hole (4102); The floating member (42) is movably arranged in the housing assembly (41) and is located outside the oil filter hole (4102). The floating member (42) can float toward the opening through the fuel entering the oil filter hole (4102) until the opening is blocked.

8. The fuel tank pipe assembly according to claim 7, characterized in that: The housing assembly (41) includes a cylindrical shell (411) and a cover (412), wherein: The cylindrical shell (411) is fixedly connected to the housing (3) and is located outside the through opening. The side of the cylindrical shell (411) away from the housing (3) is open, and the oil inlet (4101) is provided on the cylindrical shell (411); The sealing cover (412) is buckled onto the open side of the cylindrical shell (411), and the oil filter hole (4102) is provided on the sealing cover (412).

9. A multifunctional valve, characterized in that: It comprises a valve body (2) and a fuel tank pipe assembly according to any one of claims 1 to 8, wherein the valve body (2) is fixed integrally with the shell (3) and is located on the external surface (102), and the valve port of the valve body (2) is connected to the air flow channel (301).

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