A novel alcohol-based liquid fuel combination valve

Abstract

A novel alcohol-based liquid fuel combination valve includes a main valve body, an on / off valve, a breather valve, and a pressure relief valve mounted on the main valve body. The main valve body has a breather channel communicating with the internal cavity of the fuel cylinder. The breather valve includes a resilient self-closing valve element, a sealing ring, a threaded sleeve, and a bushing. The resilient self-closing valve element, located within the breather channel, has an air inlet port and a self-closing port. The self-closing port is normally closed but opens to supply air when negative pressure is generated within the fuel cylinder. The threaded sleeve has an external thread that mates with the internal thread of the breather channel, and is installed at the air inlet end via a threaded connection. A bushing is located at the front end of the threaded sleeve, passing through the sealing ring and inserting into the air inlet port of the resilient self-closing valve element to achieve a sealed fit. A filter screen is connected to the outer end face of the threaded sleeve to filter the intake air and provide flame-retardant protection. This structure is compact, easy to install, and features low-negative-pressure opening, effective sealing, and safe air intake functions, making it suitable for atmospheric pressure closed-loop supply systems for alcohol-based fuels.

Description

Technical Field

[0001] This invention relates to the field of fuel valve technology, specifically to a novel alcohol-based liquid fuel combination valve. Background Technology

[0002] An atmospheric pressure liquid fuel combination valve is an on / off valve installed at the opening of a sealed liquid fuel bottle, used to control fuel output and sealed storage.

[0003] During use, the internal pressure of the cylinder will fluctuate as the liquid fuel inside is consumed or the ambient temperature changes. To maintain a constant pressure balance inside the cylinder, this combination valve needs to be equipped with a breather valve to replenish or release gas in a timely manner, ensuring that the system maintains a relatively stable pressure in a closed state while preventing liquid fuel leakage.

[0004] Existing breather valves often suffer from various malfunctions, affecting their performance and posing safety hazards. The main problems include: 1) Excessive negative pressure during valve opening, leading to difficulties in liquid extraction. 2) Discontinuous intake, with intermittent flow in the intake channel causing system fluctuations. 3) Inaccurate valve resetting, potentially causing fuel leakage. 4) Lack of an effective flame-retardant structure at the intake port, failing to meet relevant safety standards. These problems severely impact the normal performance of the combination valve and may jeopardize the safety of system operation.

[0005] Therefore, in order to solve the above problems, a new type of alcohol-based liquid fuel combination valve is needed. Summary of the Invention

[0006] This utility model addresses the shortcomings of existing technologies by proposing a novel alcohol-based liquid fuel combination valve, the specific technical solution of which is as follows:

[0007] A novel alcohol-based liquid fuel combination valve includes a main valve body, an on / off valve, a breather valve, and a pressure relief valve disposed on the main valve body, characterized in that:

[0008] The main valve body is provided with a breathing channel that communicates with the inner cavity of the bottle.

[0009] The breather valve includes a resilient self-closing valve element, a sealing ring, a threaded sleeve, and a bushing;

[0010] The elastic self-closing valve is located in the breathing channel, and the elastic self-closing valve includes an air inlet port and a self-closing port.

[0011] The self-closing port is normally closed, but opens when negative pressure is generated inside the bottle to replenish air.

[0012] The air inlet end of the breathing channel is provided with an internal thread, and the outer periphery of the screw sleeve is provided with an external thread that mates with the internal thread. The screw sleeve is installed at the air inlet end of the breathing channel by a threaded connection.

[0013] The sealing ring is sleeved on the outer periphery of the air inlet end of the elastic self-closing valve. The front end of the threaded sleeve is provided with a bushing. The bushing passes through the inner hole of the sealing ring and is inserted into the air inlet port of the elastic self-closing valve, so that the front end of the threaded sleeve and the elastic self-closing valve form a reliable sealing fit.

[0014] To better realize this utility model, it can be further made as follows:

[0015] The opening negative pressure of the elastic self-closing valve is not higher than 1 kPa.

[0016] Furthermore: the elastic self-closing valve is a duckbill rubber.

[0017] Furthermore, the outer end face of the screw sleeve is detachably connected to a filter screen for filtering the intake air.

[0018] Furthermore, the outer end face of the threaded sleeve is provided with a thread blank groove.

[0019] Furthermore, the filter screen is made of stainless steel.

[0020] Furthermore, the self-closing port of the duckbill rubber can block liquid backflow when it is not open, thereby preventing liquid fuel leakage.

[0021] Furthermore, the duckbill rubber is made of silicone rubber.

[0022] The beneficial effects of this utility model are as follows:

[0023] First, this invention uses an elastic self-closing valve as the core component of the breathing valve, preferably made of duckbill rubber material, which has good flexibility and self-resetting ability. This allows the breathing valve to automatically open when a negative pressure of no more than 1 kPa is generated inside the bottle, which is far lower than the opening negative pressure value required by traditional structures, only about 1 / 4 of the opening negative pressure of the original rigid valve structure. This design significantly reduces the suction resistance when extracting fuel from the bottle, which is beneficial to the continuous and stable output of liquid fuel.

[0024] Secondly, this utility model achieves a convenient and reliable detachable connection through the threaded engagement of the screw sleeve with the air inlet end of the breathing channel, which facilitates assembly and maintenance.

[0025] Meanwhile, a sealing ring is positioned on the outer periphery of the air inlet end of the elastic self-closing valve. This ring, in conjunction with a bushing at the front end of the threaded sleeve, passes through the inner hole of the sealing ring and inserts into the air inlet port of the elastic self-closing valve, creating a stable and reliable seal between the valve and the sleeve. This structure effectively prevents air leakage and liquid spillage, ensuring that the liquid does not overflow even when the bottle is tilted or shaken.

[0026] Third, this utility model adds a detachable filter screen to the outer end face of the screw sleeve, preferably using stainless steel filter material. On the one hand, the filter screen can effectively block dust, particles and other impurities that enter the breathing channel, ensuring the purity of the fuel in the bottle and extending the life of the combustion system; on the other hand, stainless steel has good flame retardant properties, which can prevent the backflow of fire source into the bottle to a certain extent, further improving the fire safety of the overall system and meeting the safety regulations for the use of alcohol-based liquid fuels. Attached Figure Description

[0027] Figure 1 This is the overall structure of the present utility model;

[0028] Figure 2 This is a front view of the present utility model;

[0029] Figure 3 for Figure 2 AA section view;

[0030] Figure 4 Here is a structural diagram of the threaded sleeve;

[0031] Figure 5 This is a diagram of the valve body structure.

[0032] The attached diagram shows the following components: valve body 1, on / off valve 2, breather valve 3, pressure relief valve 4, breather channel 5, flexible self-closing valve 6, air inlet port 7, self-closing port 8, bushing 9, sealing ring 10, threaded sleeve 11, threaded blank groove 12, external thread 13, internal thread 14, and filter screen 15. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] like Figures 1 to 5 As shown:

[0036] A novel breather valve 3 structure on an alcohol-based liquid fuel combination valve includes a main valve body 1, an on / off valve 2 disposed on the main valve body 1, a breather valve 3, and a pressure relief valve 4.

[0037] The main valve body 1 has a breathing channel 5 inside that communicates with the inner cavity of the fuel cylinder, which is used for gas exchange when the pressure inside the cylinder changes.

[0038] The breathing valve 3 is installed in the breathing channel 5 on the main valve body 1. The breathing valve 3 includes an elastic self-closing valve element 6, a sealing ring 10, a screw sleeve 11, and a bushing 9.

[0039] The elastic self-closing valve 6 is integrally disposed inside the breathing channel 5. The elastic self-closing component includes an air inlet port 7 and a self-closing port 8. The self-closing port 8 is normally closed and only opens automatically when negative pressure occurs inside the cylinder to allow external air to enter the cylinder, thereby preventing abnormal fuel supply caused by excessively low internal pressure.

[0040] The elastic self-closing valve 6 uses duckbill adhesive, which is a mature component commonly used for unidirectional gas flow. Its typical structure includes an integrally molded thin-walled adhesive body and a duckbill-shaped opening for the self-closing port 8. Its sealing performance comes from the material's resilience and the structural compression state, and it has the characteristics of good elasticity, reliable self-closing, and sensitive response.

[0041] The air inlet end of the breathing channel 5 is provided with an internal thread 14. The outer circumference of the threaded sleeve 11 is machined with an external thread 13 to match it. The threaded sleeve 11 is connected and fixed to the internal thread 14 of the air inlet end of the breathing channel 5 by rotating and screwing it in.

[0042] The sealing ring 10 is sleeved on the outer periphery of the air inlet end of the elastic self-closing valve 6. A bushing 9 is provided at the front end of the threaded sleeve 11. By screwing the threaded sleeve 11 into the air inlet end of the breathing channel 5, the bushing 9 passes through the inner hole of the sealing ring 10 and is inserted into the air inlet port 7 of the elastic self-closing valve 6. After the bushing 9 is inserted, it securely limits the air inlet end of the elastic self-closing valve 6 and forms a reliable sealing fit between the front end of the threaded sleeve 11 and the elastic self-closing valve 6, ensuring that the air channel is sealed and does not leak when in operation.

[0043] To further improve air filtration capacity, a detachable filter screen 15 is provided on the outer end face of the screw sleeve 11. During installation, it is connected to the screw sleeve 11 by adhesive bonding, which facilitates future replacement and cleaning.

[0044] The filter screen 15 is preferably made of stainless steel, which has good corrosion resistance and mechanical strength, and can effectively filter particulate impurities in the air, preventing impurities from entering the bottle and contaminating the fuel. The outer end face of the threaded sleeve 11 is provided with a threaded blank groove 12. The threaded blank groove 12 structure facilitates tightening or loosening of the threaded sleeve 11, making subsequent disassembly, inspection and maintenance convenient.

[0045] Preferably, the opening negative pressure of the elastic self-closing valve 6 is not higher than 1 kPa, so as to ensure timely gas replenishment when the cylinder is slightly negatively pressured due to fuel consumption, and maintain stable system operation.

[0046] The working process of this utility model is as follows: during use, when the fuel in the bottle is gradually consumed and a negative pressure is formed inside, the self-closing port 8 of the duckbill rubber will automatically open under the action of negative pressure, allowing external air to enter the elastic self-closing valve 6 along the path of filter screen 15, screw sleeve 11, and bushing 9, and then enter the bottle through the air inlet port 7 and the open self-closing end of the elastic self-closing valve 6 and the breathing channel 5.

[0047] After the gas replenishment is completed, the rubber nozzle quickly resets and seals under external pressure to prevent backflow of liquid fuel. If the cylinder experiences a drastic temperature rise or abnormal pressure, overpressure can be released through the pressure relief valve 4 on the main valve body 1 to ensure system safety.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel alcohol-based liquid fuel combination valve, comprising a main valve body, an on / off valve, a breather valve, and a pressure relief valve disposed on the main valve body, characterized in that: The main valve body is provided with a breathing channel that communicates with the inner cavity of the bottle. The breather valve includes a resilient self-closing valve element, a sealing ring, a threaded sleeve, and a bushing; The elastic self-closing valve is located in the breathing channel, and the elastic self-closing valve includes an air inlet port and a self-closing port. The self-closing port is normally closed, but opens when negative pressure is generated inside the bottle to replenish air. The air inlet end of the breathing channel is provided with an internal thread, and the outer periphery of the screw sleeve is provided with an external thread that mates with the internal thread. The screw sleeve is installed at the air inlet end of the breathing channel by a threaded connection. The sealing ring is sleeved on the outer periphery of the air inlet end of the elastic self-closing valve. The front end of the threaded sleeve is provided with a bushing. The bushing passes through the inner hole of the sealing ring and is inserted into the air inlet port of the elastic self-closing valve, so that the front end of the threaded sleeve and the elastic self-closing valve form a reliable sealing fit.

2. The novel alcohol-based liquid fuel combination valve according to claim 1, characterized in that: The opening negative pressure of the elastic self-closing valve is not higher than 1 kPa.

3. A new alcohol-based liquid fuel combination valve according to claim 2, characterized in that: The elastic self-closing valve is a duckbill rubber.

4. The novel alcohol-based liquid fuel combination valve according to claim 3, characterized in that: The outer end face of the threaded sleeve is detachably connected to a filter screen for filtering the intake air.

5. The novel alcohol-based liquid fuel combination valve according to claim 4, characterized in that: The outer end face of the threaded sleeve is provided with a thread blank groove.

6. The novel alcohol-based liquid fuel combination valve according to claim 5, characterized in that: The filter screen is made of stainless steel.

7. The novel alcohol-based liquid fuel combination valve according to claim 6, characterized in that: The self-closing port of the duckbill rubber can block liquid backflow when it is not open, thereby preventing liquid fuel leakage.

8. A new alcohol-based liquid fuel group valve according to claim 7, characterized in that: The duckbill rubber is made of silicone rubber.

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