Oil tank refueling one-way valve

Abstract

The utility model relates to the technical field of one-way valves, in particular to an oil tank refueling one-way valve which comprises a refueling one-way valve body, an oil tank and a refueling pipe, the refueling one-way valve body is installed in the oil tank, the refueling one-way valve body is communicated with the refueling pipe and the oil tank, and a positioning cylinder is arranged on the refueling one-way valve body. A first locking piece is installed at one end of the positioning barrel in a clamped mode, a second locking piece is installed at the other end of the positioning barrel in a sleeved mode, and an O-shaped rubber ring matched with the first locking piece in a sealed mode is clamped in the positioning barrel. According to the fuel tank refueling one-way valve, the first locking piece used for fixing the refueling pipe is completely clamped into the positioning barrel, the connection fastening performance of the refueling pipe and the one-way valve is improved, then the sealing performance is guaranteed, the positioning barrel and the turning cover are sealed and locked through the second locking piece, and the sealing piece used for the turning cover is fastened between the positioning barrel and the second locking piece; the sealing performance of the one-way valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, and specifically relates to a one-way valve for fuel tank refueling. Background Technique

[0002] The one-way valve for fuel tank refueling, abbreviated as ICV valve, mainly functions to ensure that fuel can only flow from the outside into the fuel tank, prevent fuel from leaking to the refueling pipe, and play a role in pressure reduction to ensure that the fuel gun does not jump prematurely due to the back pressure of the valve body itself during the refueling process. The one-way valve for fuel tank refueling has the functions of preventing fuel leakage, preventing air from entering, maintaining the stability of the fuel tank pressure, and enhancing safety. When the fuel gun is inserted into the fuel filling port, a sealed space is formed between it and the fuel filling port. The operation of the fuel gun causes the valve to open, allowing fuel to flow into the fuel tank.

[0003] The existing valve with a stepped sealing gasket disclosed in CN217177536U points out that the sealing effect of the rubber ring of the valve is not ideal, and it is easy to have partial oil leakage during the oil injection process, posing certain potential safety hazards. Therefore, a stepped rubber part is used for sealing treatment. However, the connection part between the valve body and the refueling pipe is locked by clamping. The traditional connection method uses a trapezoidal convex structure for clamping. The vibration caused by vehicle driving will loosen the connection between the refueling pipe and the one-way fueling valve, and then cause oil leakage, resulting in safety problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a one-way valve for fuel tank refueling to solve the problem in the above background technique that the connection part between the body of the one-way valve for fuel tank refueling and the refueling pipe is locked by clamping, and the vibration caused by vehicle driving will loosen the connection between the refueling pipe and the one-way fueling valve, and then cause oil leakage, resulting in safety problems.

[0005] To achieve the above object, the utility model provides the following technical solutions: A fuel tank refueling one-way valve, comprising a refueling one-way valve main body, a fuel tank and a refueling pipe. The refueling one-way valve main body is installed in the fuel tank, and the refueling one-way valve main body connects the refueling pipe and the fuel tank. A positioning cylinder is provided on the refueling one-way valve main body. One end of the positioning cylinder is clamped and installed with a first locking member, and the other end of the positioning cylinder is sleeved and installed with a second locking member. The side surface of the positioning cylinder corresponding to the first locking member is evenly spaced with clamping holes, so that there is no notch at the end of the positioning cylinder. An O-ring rubber seal that is hermetically matched with the first locking member is clamped in the positioning cylinder, and a rubber seal that is hermetically matched with the second locking member is sleeved at the end of the positioning cylinder. A flip cover is clamped at the end of the second locking member, and a first hinge seat and a second hinge seat with corresponding positions are provided on the second locking member and the flip cover respectively. The rubber seal is also hermetically matched with the flip cover. A hinge pin passes through between the first hinge seat and the second hinge seat, a spring is sleeved on the hinge pin, and an extension rod is provided at the end of the spring. A limit seat is provided outside the flip cover, and the extension rod is clamped in the limit seat.

[0006] Preferably, the side surface of the positioning cylinder corresponding to the second locking member is evenly spaced with integrally formed clamping seats, and the side surface of the positioning cylinder corresponding to the second locking member is also provided with an integrally formed positioning protrusion.

[0007] Preferably, the clamping seat is of a square cone structure, and the positioning protrusion is located between two of the clamping seats.

[0008] Preferably, the first locking member is evenly spaced with integrally formed locking seats, the locking seats are elastically matched with the first locking member, and the locking seats are respectively clamped in the clamping holes.

[0009] Preferably, the side surface of the second locking member is evenly spaced with locking holes corresponding to the positions of the clamping seats, and the clamping seats are clamped and matched with the locking holes.

[0010] Preferably, the side surface of the second locking member is also evenly spaced with positioning holes, the positioning holes are located between the locking holes, and the positioning holes are clamped and matched with the positioning protrusions.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: The first locking member for fixing the fuel filling pipe of the fuel tank fuel filling one-way valve is completely clamped into the positioning cylinder body, which improves the fastening property of the connection between the fuel filling pipe and the one-way valve, and further ensures the sealing property. The positioning cylinder body and the flip cover are subjected to sealing and locking treatment through the second locking member, and the sealing member for the flip cover is fastened between the positioning cylinder body and the second locking member, which improves the sealing property of the one-way valve. The first locking member and the second locking member of the fuel tank fuel filling one-way valve are respectively locked on the inner and outer sides of both ends of the positioning cylinder body. Since the first locking member is completely clamped in the positioning cylinder body, there is no notch at the opening part of the positioning cylinder body, which ensures the structural strength and reduces the risk of oil leakage caused by the looseness of the connection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a cross-sectional view of a fuel tank fuel filling one-way valve of the utility model;

[0013] Figure 2 FIG. is a schematic diagram of the connection between the main body of a fuel tank fuel filling one-way valve of the utility model and the fuel tank;

[0014] Figure 3 FIG. is a schematic diagram of the connection structure between the flip cover and the second locking member of a fuel tank fuel filling one-way valve of the utility model through the second locking member and the hinge pin;

[0015] Figure 4 FIG. is an axonometric drawing of a fuel tank fuel filling one-way valve of the utility model;

[0016] Figure 5 FIG. is a side view of a fuel tank fuel filling one-way valve of the utility model;

[0017] Figure 6 FIG. is an exploded view of a fuel tank fuel filling one-way valve of the utility model.

[0018] In the figure: 1. Main body of the fuel filling one-way valve; 2. Positioning cylinder body; 201. Clamping seat; 202. Positioning protrusion; 203. Clamping hole; 3. First locking member; 301. Locking seat; 4. O-ring; 5. Second locking member; 501. Locking hole; 502. Positioning hole; 503. First hinge seat; 6. Rubber sealing member; 7. Hinge pin; 8. Spring; 801. Extension rod; 9. Flip cover; 901. Second hinge seat; 902. Limiting seat; 10. Fuel tank; 11. Fuel filling pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0020] Please refer to Figure 1-6, the present utility model provides a technical solution: a fuel tank filling one-way valve, which includes a filling one-way valve main body 1, a fuel tank 10 and a filling pipe 11. The filling one-way valve main body 1 is installed inside the fuel tank 10, and the filling one-way valve main body 1 connects the filling pipe 11 and the fuel tank 10. A positioning cylinder 2 is provided on the filling one-way valve main body 1, and a first locking member 3 is snap-fitted and installed at one end of the positioning cylinder 2. The side surface of the positioning cylinder 2 corresponding to the first locking member 3 is evenly spaced with clamping holes 203, so that there is no notch at the end of the positioning cylinder 2. The side surface of the positioning cylinder 2 corresponding to the second locking member 5 is evenly spaced with an integrally formed clamping seat 201, and the side surface of the positioning cylinder 2 corresponding to the second locking member 5 also has an integrally formed positioning protrusion 202. This structure allows the positioning cylinder 2 to be fixed to the first locking member 3 through the clamping holes 203. The positioning cylinder 2 is connected and positioned with the second locking member 5 through the clamping seat 201 and the positioning protrusion 202. By opening the clamping holes 203 on the positioning cylinder 2, there is no notch at the opening part of the positioning cylinder 2, ensuring the strength of the end structure of the positioning cylinder 2 and reducing the risk of connection loosening. The clamping seat 201 is a square cone structure, and the positioning protrusion 202 is located between two of the clamping seats 201. This structure only has one positioning protrusion 202 on the side surface of the positioning cylinder 2, which plays a role in limiting the locking of the positioning cylinder 2 and the second locking member 5. The clamping seat 201 has a tapered structure, which is easy for clamping and locking. And the other end of the positioning cylinder 2 is sleeved with a second locking member 5. An O-ring 4 that is hermetically matched with the first locking member 3 is clamped inside the positioning cylinder 2, and a rubber seal 6 that is hermetically matched with the second locking member 5 is sleeved at the end of the positioning cylinder 2. The rubber seal 6 is a traditional stepped seal, which plays a multiple sealing role. The first locking member 3 is evenly spaced with an integrally formed locking seat 301, and the locking seat 301 is elastically matched with the first locking member 3. And the locking seat 301 is respectively clamped into the clamping holes 203. This structure allows the first locking member 3 to be locked relative to the positioning cylinder 2 through the elastic setting of the locking seat 301, so that the locking seat 301 can be smoothly inserted into the clamping holes 203, realizing the locking of the first locking member 3 and the positioning cylinder 2, fixing the first locking member 3 to the filling pipe 11, and installing the filling pipe 11 onto the filling one-way valve main body 1, realizing the connection between the filling one-way valve main body 1 and the filling pipe 11, so that the filling pipe 11 is connected to the fuel tank 10 through the filling one-way valve main body 1. The end of the second locking member 5 is clamped with a flip cover 9, and the first hinge seat 503 and the second hinge seat 901 with corresponding positions are respectively provided on the second locking member 5 and the flip cover 9. And the rubber seal 6 is also hermetically matched with the flip cover 9. The side surface of the second locking member 5 is evenly spaced with locking holes 501 corresponding to the positions of the clamping seats 201, and the clamping seats 201 and the locking holes 501 are clamped and matched. This structure allows the second locking member 5 to be locked through the clamping of the locking holes 501 and the clamping seats 201, locking the flip cover 9 to the positioning cylinder 2 through the second locking member 5. When fuel is filled into the fuel tank 10, fuel is filled by opening the flip cover 9.After refueling, the flip cover 9 closes through the spring 8 to achieve one-way flow control. There is a hinge pin 7 passing through between the first hinge seat 503 and the second hinge seat 901. A spring 8 is sleeved on the hinge pin 7, and an extension rod 801 is provided at the end of the spring 8. A limit seat 902 is provided outside the flip cover 9, and the extension rod 801 is stuck in the limit seat 902. The second locking member 5 is also evenly spaced with positioning holes 502 on the side, and the positioning holes 502 are located between the locking holes 501. The positioning holes 502 are in snap-fit with the positioning protrusions 202. When fixing the second locking member 5 and the positioning cylinder 2, only by making one of the positioning holes 502 correspond to the position of the positioning protrusion 202 can the locking and fixing of the second locking member 5 and the positioning cylinder 2 be completed.

[0021] Working principle: When using this fuel tank refueling one-way valve, first, when refueling the fuel tank 10 through the fuel pipe 11, the fuel enters the fuel tank 10 through the refueling one-way valve body 1. The flip cover 9 rotates and opens through the hinge pin 7 under the fuel pressure to achieve refueling. After refueling, the spring 8 acts on the flip cover 9 through the extension rod 801 to make the flip cover 9 close. The limit seat 902 makes the extension rod 801 stable relative to the flip cover 9. The first hinge seat 503 and the second hinge seat 901 are used for the hinge fixation of the flip cover 9 and the second locking member 5. The rubber seal 6 plays a sealing role for both the positioning cylinder 2 and the second locking member 5 and the flip cover 9. The cooperation between the positioning protrusion 202 and the positioning hole 502 is used for the positioning of the positioning cylinder 2 and the second locking member 5. The cooperation between the clamping seat 201 and the locking hole 501 is used for the locking of the second locking member 5 and the positioning cylinder 2. The first locking member 3 is locked relative to the positioning cylinder 2 through the snap-fit of the locking seat 301 and the clamping hole 203. The O-ring 4 plays a sealing role for the first locking member 3 and the positioning cylinder 2, making the structure of the refueling one-way valve body 1 stable and with high sealing performance. Through the setting of the flip cover 9, one-way flow control is carried out to avoid fuel leakage, thus completing a series of work.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fuel tank refueling check valve, comprising a refueling check valve body (1), a fuel tank (10) and a refueling pipe (11), wherein the refueling check valve body (1) is installed in the fuel tank (10), and the refueling check valve body (1) is connected to the refueling pipe (11) and the fuel tank (10), characterized in that: The refueling one-way valve body (1) is provided with a positioning cylinder (2), and one end of the positioning cylinder (2) is clamped and installed with a first locking piece (3), and the other end of the positioning cylinder (2) is sleeved and installed with a second locking piece (5). The side surfaces of the positioning cylinder (2) and the first locking piece (3) at corresponding positions are evenly spaced apart to provide clamping holes (203) so that there is no gap at the end of the positioning cylinder (2). An O-type rubber ring (4) that seals with the first locking piece (3) is clamped in the positioning cylinder (2), and a rubber seal (6) that seals with the second locking piece (5) is sleeved on the end of the positioning cylinder (2). The end of the second locking member (5) is engaged with the flip cover (9), and the second locking member (5) and the flip cover (9) are respectively provided with a first hinge seat (503) and a second hinge seat (901) corresponding to the position, and the rubber seal (6) and the flip cover (9) are also sealed together, a hinge pin (7) passes through the first hinge seat (503) and the second hinge seat (901), and a spring (8) is sleeved on the hinge pin (7), and an extension rod (801) is provided at the end of the spring (8), and a limit seat (902) is provided on the outside of the flip cover (9), and the extension rod (801) is stuck in the limit seat (902).

2. The fuel tank refueling check valve according to claim 1, characterized in that: The side surfaces of the positioning cylinder (2) and the second locking member (5) at corresponding positions are evenly spaced with clamping seats (201) of an integral structure, and the side surfaces of the positioning cylinder (2) and the second locking member (5) at corresponding positions are also provided with positioning protrusions (202) of an integral structure.

3. The fuel tank refueling check valve according to claim 2, characterized in that: The clamping seat (201) is a square cone structure, and the positioning protrusion (202) is located between two of the clamping seats (201).

4. The fuel tank refueling check valve according to claim 2, characterized in that: The first locking member (3) is evenly spaced with locking seats (301) of an integral structure, and the locking seats (301) are elastically matched with the first locking member (3), and the locking seats (301) are respectively engaged in the engaging holes (203).

5. The fuel tank refueling check valve according to claim 2, characterized in that: Locking holes (501) corresponding to the positions of the clamping seat (201) are evenly spaced apart on the side surface of the second locking member (5), and the clamping seat (201) is engaged with the locking holes (501).

6. The fuel tank refueling check valve according to claim 2, characterized in that: Positioning holes (502) are evenly spaced apart on the side of the second locking member (5), and the positioning holes (502) are located between the locking holes (501), and the positioning holes (502) are engaged with the positioning protrusions (202).

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