A segmented refueling vent mechanism for a tank tip valve

Abstract

The utility model relates to the technical field of automobile valve, especially a sectional type oiling and exhaust mechanism of tank upset valve, including valve body, the lower end of valve body is equipped with the oil inlet, is equipped with the first valve cavity in valve body, is equipped with the exhaust hole in the first valve cavity, is equipped with the second valve cavity in valve body, and is equipped with the first connecting hole between the first valve cavity and the second valve cavity, the first valve core subassembly that can open and close first connecting hole is slidably arranged in the second valve cavity, the installation cavity is located in the first valve core subassembly one side and is equipped with the extension setting to the first valve cavity inside one end, is equipped with the second connecting hole between the installation cavity and the first valve cavity, is equipped with the second valve core subassembly that can open and close second connecting hole in the installation cavity, the utility model has the advantages of providing the sectional type oiling and exhaust mechanism of tank upset valve that can realize the change of oil tank oiling speed, increases the full use of oil tank space, and avoids the risk of fuel overflow.

Description

Technical Field

[0001] This utility model relates to the field of automotive valve technology, specifically to a segmented refueling and venting mechanism for a fuel tank tilting valve. Background Technology

[0002] For fuel to flow from a car's fuel tank, the air pressure inside and outside the tank needs to be balanced. Therefore, an internal and external gas exchange pipe needs to be installed on the top cover of the fuel tank. The fuel tank tipping valve is located inside the internal and external gas exchange pipe on the inside side of the top cover of the fuel pump assembly. It is used to prevent fuel from overflowing from the gas exchange pipe due to bumps or tipping of the car.

[0003] However, the current tipping valve causes the fuel nozzle to shut off prematurely when the fuel tank reaches a certain height, resulting in unutilized fuel tank space and wasted space. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a segmented refueling and venting mechanism for a fuel tank tilting valve that can change the refueling speed of the fuel tank, thereby increasing the full utilization of the fuel tank space and avoiding the risk of fuel spillage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segmented refueling and venting mechanism for a tank tilting valve, comprising a valve body, an oil inlet at the lower end of the valve body, a first valve chamber within the valve body, and an venting hole within the first valve chamber, characterized in that: a second valve chamber is provided within the valve body, and a first connecting hole is provided between the first valve chamber and the second valve chamber; a first valve core assembly capable of opening and closing the first connecting hole is slidably provided within the second valve chamber; an installation cavity is provided on one side of the first valve core assembly within the second valve chamber, and one end of the installation cavity extends into the first valve chamber; a second connecting hole is provided between the installation cavity and the first valve chamber; and a second valve core assembly capable of opening and closing the second connecting hole is provided within the installation cavity.

[0006] The above technical solution employs a first valve core assembly and a second valve core assembly with a height difference between them. The height of the second valve core assembly is greater than that of the first valve core assembly, and preferably, the diameter of the first connecting hole is greater than that of the second connecting hole. When the fuel tank is at a low fuel level, the fuel nozzle dispenses fuel at a high flow rate. When the fuel level reaches a certain height, the first valve core assembly floats up, causing the first connecting hole to close. At this point, the refueling speed slows down until the fuel tank is completely full. Then, the second valve core assembly floats up, closing the second connecting hole, and the fuel nozzle closes, completing the refueling process. This maximizes the utilization of the fuel tank's space while avoiding the risk of fuel spillage.

[0007] A further feature of this invention is that a height difference exists between the first valve core assembly and the second valve core assembly, with the second valve core assembly being higher than the first valve core assembly; the first valve core assembly includes a first float, and a first sealing diaphragm is provided at the upper end of the first float, the first sealing diaphragm being able to open and close the first connection hole.

[0008] Using the above technical solution: when adding oil at a low oil level, the oil level reaches a certain height, causing the first float to move upward due to buoyancy, which prompts the first sealing diaphragm to close the first connection hole.

[0009] A further feature of this invention is that: a lower valve cover is detachably provided at the lower end of the valve body, a first mounting boss is provided on the lower valve cover, a first spring mounting cavity is provided at the lower end of the first float, a first compression spring is provided between the first float and the lower valve cover, one end of the first compression spring is connected to the first mounting boss, and the other end is connected to the first spring mounting cavity, and the elastic force of the first compression spring is less than the weight of the first float.

[0010] The above technical solution is adopted: by setting the first compression spring, and the elastic force of the first compression spring is less than the weight of the first float, when the first float moves upward due to buoyancy, the elastic force of the first compression spring can work together with the buoyancy to make the first float move upward, and when the buoyancy disappears, the first float can compress the first compression spring when it moves downward due to its own weight.

[0011] A further feature of this invention is that the second valve core assembly includes a second float, the upper end of which is provided with a second sealing diaphragm, which can open and close the second connection hole, the lower end of which is provided with a second spring mounting cavity, and a second compression spring is provided between the second float and the lower valve cover. One end of the second compression spring is connected to the second mounting boss, and the other end is connected to the second spring mounting cavity. The elastic force of the second compression spring is less than the weight of the second float.

[0012] Using the above technical solution: When the first sealing diaphragm closes the first connecting hole, it is time to refuel at a high oil level. The oil gun refueling speed slows down until the oil tank is completely full. The second float moves upward under the combined action of buoyancy and the elastic force of the second compression spring, causing the second sealing diaphragm to close the second connecting hole. At this time, the oil gun is closed and the refueling is completed. When the buoyancy disappears, the second float can compress the second compression spring when it moves downward due to its own weight.

[0013] A further feature of this invention is that: the outer walls of the first float and the second float are evenly spaced along their circumference, and the inner walls of the second valve cavity and the mounting cavity are provided with guide blocks that can cooperate with the guide grooves.

[0014] The above technical solution is adopted: by setting the guide groove and the guide block, when the first float and the second float move upward due to buoyancy or downward due to gravity, the guide block can move back and forth along the guide groove to play a guiding role and prevent the first float and the second float from deviating in direction.

[0015] A further feature of this invention is that a sealing ring is provided between the lower valve cover and the valve body, and a sealing groove is provided on the lower valve cover for the installation of the sealing ring.

[0016] The above technical solution improves the sealing performance between the lower valve cover and the valve body by setting a sealing ring, and the sealing groove facilitates the assembly of the sealing ring.

[0017] A further feature of this invention is that two latching blocks are provided on both sides of the lower outer wall of the valve body, the lower valve cover is provided with latching grooves for the latching blocks to engage, a positioning block is provided on the outer wall of the valve body between the latching blocks, and a positioning groove corresponding to the positioning block is provided on the lower valve cover.

[0018] Using the above technical solution: During use, simply align the positioning slot with the positioning block and install it, so that the buckle block can be squeezed and deformed to snap into the buckle slot, thus achieving a buckle connection, which is convenient for workers to assemble.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is an exploded view of the present invention.

[0023] Figure 4 This is a schematic diagram of the lower valve seat structure of this utility model.

[0024] Figure 5 This is a structural diagram of the internal structure of the second valve chamber of this utility model.

[0025] Labeling: Valve body 1, first valve chamber 11, second valve chamber 12, first valve core assembly 121, first float 121a, first spring mounting chamber 1211a, first sealing diaphragm 121b, first compression spring 121c, first connecting hole 13, mounting chamber 14, second valve core assembly 141, second float 141a, second spring mounting chamber 1411a, second sealing diaphragm 141b, second compression spring 141c, second connecting hole 15, guide groove 16, guide block 17, snap-fit ​​block 18, positioning block 19, lower valve cover 2, first mounting boss 21, second mounting boss 22, sealing groove 23, sealing ring 231, snap-fit ​​groove 24, positioning groove 25. Detailed Implementation

[0026] In the accompanying drawings of this specific embodiment and the disclosed embodiments, only the structures involved in the disclosed embodiments are involved. Other structures can be referred to with ordinary design. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of this utility model, they are protected by patent law.

[0027] like Figure 1-5 The illustrated fuel tank tipping valve segmented refueling and venting mechanism includes a valve body 1 with an oil inlet at the lower end. A first valve chamber 11 is located within the valve body 1, and an vent hole is located within the first valve chamber 11. A second valve chamber 12 is located within the valve body 1, and a first connecting hole 13 is provided between the first valve chamber 11 and the second valve chamber 12. A first valve core assembly 121 capable of opening and closing the first connecting hole 13 is slidably disposed within the second valve chamber 12. A mounting cavity 14 is located on one side of the first valve core assembly 121 within the second valve chamber 12, and one end of the mounting cavity 14 extends into the first valve chamber 11. A second connecting hole 15 is provided between the mounting cavity 14 and the first valve chamber 11, and a second valve core assembly 141 capable of opening and closing the second connecting hole 15 is disposed within the mounting cavity 14.

[0028] like Figure 2 A height difference is formed between the first valve core assembly 121 and the second valve core assembly 141 shown, with the second valve core assembly 141 being higher than the first valve core assembly 121; the first valve core assembly 121 includes a first float 121a, and a first sealing diaphragm 121b is provided at the upper end of the first float 121a, which can open and close the first connection hole 13.

[0029] like Figure 2-3The valve body 1 shown is detachably provided with a lower valve cover 2 at its lower end. The lower valve cover 2 is provided with a first mounting boss 21. The lower end of the first float 121a is provided with a first spring mounting cavity 1211a. A first compression spring 121c is provided between the first float 121a and the lower valve cover 2. One end of the first compression spring 121c is connected to the first mounting boss 21, and the other end is connected to the first spring mounting cavity 1211a. The elastic force of the first compression spring 121c is less than the weight of the first float 121a.

[0030] like Figure 2-3 The second valve core assembly 141 shown includes a second float 141a, a second sealing diaphragm 141b at the upper end of the second float 141a, the second sealing diaphragm 141b being able to open and close the second connection hole 15, a second spring mounting cavity 1411a at the lower end of the second float 141a, and a second compression spring 141c between the second float 141a and the lower valve cover 2, one end of the second compression spring 141c being connected to the second mounting boss 22, and the other end being connected to the second spring mounting cavity 1411a, the elastic force of the second compression spring 141c being less than the weight of the second float 141a.

[0031] like Figure 3 , 5 The outer walls of the first float 121a and the second float 141a shown are provided with guide grooves 16 evenly spaced along their circumference. The inner walls of the second valve cavity 12 and the mounting cavity 14 are provided with guide blocks 17 that can cooperate with the guide grooves 16.

[0032] like Figure 3-4 A sealing ring 231 is provided between the lower valve cover 2 and the valve body 1, and the lower valve cover 2 is provided with a sealing groove 23 for the installation of the sealing ring 231; Figure 3-4 The valve body 1 shown has two latching blocks 18 on each side of the lower outer wall. The lower valve cover 2 has a latching groove 24 for the latching blocks 18 to latch. The valve body 1 has a positioning block 19 between the latching blocks 18 on the outer wall. The lower valve cover 2 has a positioning groove 25 corresponding to the positioning block 19.

[0033] In use, this invention utilizes a first valve core assembly 121 and a second valve core assembly 141 with a height difference between them. The height of the second valve core assembly 141 is greater than that of the first valve core assembly 121, and preferably the diameter of the first connecting hole 13 is greater than the diameter of the second connecting hole 15. When the fuel tank is at a low fuel level, the fuel nozzle dispenses fuel at a high flow rate. When the fuel level reaches a certain height, the first float 121a rises, allowing the first sealing diaphragm 121b to close the first connecting hole 13. At this point, the refueling speed slows down until the fuel tank is completely full. Then, the second float 141a rises, allowing the second sealing diaphragm 141b to close the second connecting hole 15. Simultaneously, the fuel nozzle shuts off, and refueling is complete. This segmented refueling maximizes the space utilization of the fuel tank and avoids the risk of fuel spillage.

Claims

1. A segmented refueling and venting mechanism for a fuel tank tilting valve, comprising a valve body, an oil inlet at the lower end of the valve body, a first valve chamber within the valve body, and an venting hole within the first valve chamber, characterized in that: The valve body is provided with a second valve chamber, and a first connecting hole is provided between the first valve chamber and the second valve chamber. A first valve core assembly capable of opening and closing the first connecting hole is slidably provided in the second valve chamber. The second valve chamber is provided with a mounting cavity on one side of the first valve core assembly, and one end of the mounting cavity extends into the first valve chamber. A second connecting hole is provided between the mounting cavity and the first valve chamber. The second valve core assembly capable of opening and closing the second connecting hole is provided in the mounting cavity.

2. The segmented refueling and venting mechanism for a tank tilting valve according to claim 1, characterized in that: There is a height difference between the first valve core assembly and the second valve core assembly, with the second valve core assembly being higher than the first valve core assembly; the first valve core assembly includes a first float, and a first sealing diaphragm is provided at the upper end of the first float, which can open and close the first connection hole.

3. The segmented refueling and venting mechanism for a tank tilting valve according to claim 2, characterized in that: The lower end of the valve body is detachably provided with a lower valve cover, the lower valve cover is provided with a first mounting boss, the lower end of the first float is provided with a first spring mounting cavity, a first compression spring is provided between the first float and the lower valve cover, one end of the first compression spring is connected to the first mounting boss, and the other end is connected to the first spring mounting cavity, and the elastic force of the first compression spring is less than the weight of the first float.

4. The segmented refueling and venting mechanism for a tank tilting valve according to claim 3, characterized in that: The second valve core assembly includes a second float, with a second sealing diaphragm at the upper end of the second float, which can open and close the second connection hole. A second spring mounting cavity is provided at the lower end of the second float. A second compression spring is provided between the second float and the lower valve cover. One end of the second compression spring is connected to the second mounting boss, and the other end is connected to the second spring mounting cavity. The elastic force of the second compression spring is less than the weight of the second float.

5. A segmented refueling and venting mechanism for a tank tilting valve according to claim 4, characterized in that: The outer walls of the first float and the second float are evenly spaced along their circumference, and the inner walls of the second valve cavity and the mounting cavity are provided with guide blocks that can cooperate with the guide grooves.

6. The segmented refueling and venting mechanism for a tank tilting valve according to claim 5, characterized in that: A sealing ring is provided between the lower valve cover and the valve body, and a sealing groove is provided on the lower valve cover for the installation of the sealing ring.

7. A segmented refueling and venting mechanism for a tank tilting valve according to claim 6, characterized in that: Two latching blocks are provided on both sides of the lower outer wall of the valve body. The lower valve cover is provided with latching grooves for the latching blocks to engage. A positioning block is provided on the outer wall of the valve body between the latching blocks. The lower valve cover is provided with a positioning groove corresponding to the positioning block.

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