A self-closing connecting valve special for alcohol-based liquid fuel tank

Abstract

The utility model relates to low pressure vessel or atmospheric vessel accessory technical field, concretely is a kind of special self-closing connection valve for alcohol-based liquid fuel tank, including the valve body with fluid passage in inside, further include: feed connector, the feed connector is integrally formed in the one side end portion of valve body and with the fluid passage in the valve body intercommunication;Discharge connector, the discharge connector is integrally formed in the other side end portion of valve body and with the fluid passage in the valve body intercommunication, for with the oil circuit pipeline connection of external kitchen utensil;Self-closing component, the self-closing component is embedded in discharge connector, when discharge connector is not connected with the oil circuit pipeline of external kitchen utensil, self-closing component is in normally closed state;When discharge connector is connected with the oil circuit pipeline of external kitchen utensil, self-closing component is in normally open state.The utility model is by being provided with self-closing component in discharge connector, can form the double sealing structure of synergic action with valve body, significantly improves the safety performance of alcohol-based liquid fuel tank.

Description

Technical Field

[0001] This utility model relates to the technical field of low-pressure or atmospheric pressure vessel accessories, specifically a self-closing connection valve for alcohol-based liquid fuel tanks. Background Technology

[0002] In the storage and use of alcohol-based liquid fuels, valves are key components for controlling the flow of fuel, with angle valves being the most commonly used. As a common manually controlled valve, the angle valve changes the flow path by rotating the valve core. It features a simple structure and low cost, and is widely used at the outlet of alcohol-based liquid fuel tanks to achieve basic control of fuel output.

[0003] However, existing alcohol-based liquid fuel tanks typically rely solely on the aforementioned angle valves for fuel sealing during transportation. Due to the complex transportation environment, fuel tanks are inevitably subjected to external forces such as collisions, compression, or vibration. These forces can easily cause the valve core to loosen, gaps to appear on the sealing surface, or even cause the valve to open unexpectedly. Once such situations occur, alcohol-based liquid fuel is highly prone to leakage. Given the volatile and flammable nature of alcohol-based liquid fuels, leakage not only results in fuel waste and environmental pollution but may also trigger serious safety accidents such as fires and explosions, posing a significant safety hazard during transportation. Therefore, we propose a dedicated self-closing connection valve for alcohol-based liquid fuel tanks to effectively address the aforementioned drawbacks. Utility Model Content

[0004] The purpose of this utility model is to provide a self-closing connection valve specifically for alcohol-based liquid fuel tanks, which solves the problem mentioned in the background art that relies on angle valves for single sealing, making alcohol-based liquid fuels prone to leakage.

[0005] This utility model is achieved through the following technical solution: a self-closing connection valve for alcohol-based liquid fuel tanks, comprising a valve body with an internal fluid passage, and further comprising:

[0006] The feed connector is integrally formed on one side end of the valve body and communicates with the fluid channel inside the valve body, and is used to connect to the oil pipeline of an external alcohol-based liquid fuel tank.

[0007] The discharge connector is integrally formed on the other end of the valve body and communicates with the fluid channel inside the valve body, and is used to connect to the oil pipeline of the external stove.

[0008] The self-closing component is embedded in the discharge connector. When the discharge connector is not connected to the oil pipeline of the external stove, the self-closing component is in a normally closed state; when the discharge connector is connected to the oil pipeline of the external stove, the self-closing component is in a normally open state.

[0009] Optionally, the self-closing assembly includes a retaining ring detachably connected to the discharge connector, and an mounting ring integrally formed at one end of the retaining ring near the valve body, wherein the inner diameter of the mounting ring is smaller than the inner diameter of the retaining ring.

[0010] A movable ring is axially inserted inside the mounting ring, and several through-holes are equally spaced along the circumferential direction on the side wall of the movable ring; a limiting ring located inside the connecting ring is fixed at one end of the movable ring, and the outer diameter of the limiting ring is larger than the inner diameter of the mounting ring.

[0011] Optionally, the self-closing assembly further includes a cover fixed to the other end of the movable ring and located outside the fixed ring. A sealing ring is coaxially fixed to the side of the cover near the movable ring, and an elastic reset structure is connected between the cover and the valve body on the side of the cover away from the movable ring.

[0012] When the discharge connector is not connected to the oil pipeline of the external stove, the elastic reset structure is in an extended state so that each port is completely located in the inner area of ​​the mounting ring, and the end of the cap and the mounting ring cooperate to squeeze the sealing ring to form a radial seal.

[0013] Optionally, the elastic reset structure includes a positioning post fixed to the outer end of the cover, and a reset spring is sleeved on the positioning post.

[0014] Optionally, the fixing ring is detachably connected to the discharge connector via a threaded connection, and a sealing ring that fits against the inner wall of the discharge connector is fixed on the outer ring of the fixing ring.

[0015] Compared with the prior art, this utility model provides a self-closing connection valve specifically for alcohol-based liquid fuel tanks, which has the following features:

[0016] Beneficial effects:

[0017] This invention significantly improves the safety performance of alcohol-based liquid fuel tanks by incorporating a self-closing component within the discharge connector, which forms a synergistic double-sealing structure with the valve body. Specifically, when the discharge connector is not connected to the oil pipeline of an external stove, the self-closing component remains normally closed due to its elastic reset structure. At this time, the basic seal of the valve body and the active seal of the self-closing component form a double barrier. Even if the valve body becomes slightly loose or the seal fails due to accidental collision during transportation or handling, the self-closing component can still block the fuel flow path, fundamentally avoiding fuel leakage caused by accidental valve opening due to external force under a single sealing structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a diagram showing the closed state of the self-closing component of this utility model;

[0020] Figure 3 This is a schematic diagram of the interior of the discharge connector of this utility model;

[0021] Figure 4 This is a diagram showing the open state of the self-closing component of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the self-closing component of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of the self-closing component of this utility model from another perspective;

[0024] Figure 7 This is an exploded view of the self-closing component of this utility model;

[0025] Figure 8 This is an exploded view of the self-closing component of this utility model from another perspective.

[0026] In the diagram: 1. Valve body; 2. Inlet connector; 3. Outlet connector; 4. Self-closing assembly; 401. Fixed ring; 402. Mounting ring; 403. Moving ring; 404. Port; 405. Limiting ring; 406. Cover; 407. Sealing ring; 408. Elastic reset structure; 4081. Positioning pin; 4082. Return spring; 5. Sealing ring. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1: Please refer to Figures 1 to 8 A self-closing connection valve for alcohol-based liquid fuel tanks includes a valve body 1 with an internal fluid passage. The valve body 1 is cast from brass and has an angle valve structure with a built-in rotary ball valve core. The fluid passage can be manually controlled by a handle on top. Rotating the handle 90° will fully open or close the valve core, making it easy to operate and providing a reliable seal.

[0029] This embodiment also includes: feed connector 2, discharge connector 3 and self-closing assembly 4, with each component working together to achieve safe fuel transfer and sealing.

[0030] The feed connector 2 is integrally formed on one side of the valve body 1 using a hot forging process and is connected to the fluid channel inside the valve body 1. It is used to connect to the oil pipeline of an external alcohol-based liquid fuel tank. To achieve a reliable connection with the oil pipeline of the external alcohol-based liquid fuel tank, the outer surface of the feed connector 2 is threaded, and an annular groove is provided at the root of the thread. A nitrile rubber O-ring resistant to alcohol media is embedded in the groove. When it is screwed into the internal thread of the fuel tank oil pipeline, the O-ring is squeezed to form a radial seal, which can effectively prevent fuel leakage at the connection.

[0031] In addition, the discharge connector 3 is integrally formed on the other end of the valve body 1 and communicates with the fluid channel inside the valve body 1, for connecting with the oil pipeline of the external stove. Specifically, the inner surface of the discharge connector 3 is machined with threads, which can form axial positioning with the external thread end of the oil pipeline of the external stove to ensure coaxiality during docking.

[0032] In this embodiment, the self-closing component 4 is embedded in the discharge connector 3. When the discharge connector 3 is not connected to the oil pipeline of the external stove, the self-closing component 4 is in a normally closed state; when the discharge connector 3 is connected to the oil pipeline of the external stove, the self-closing component 4 is in a normally open state. At this time, fuel can flow into the stove pipeline through the flow channel of the valve body 1 and the discharge connector 3 in sequence.

[0033] With the above design, the self-closing component 4 and the valve body 1 form a dual safety barrier of "active + passive": the manual angle valve structure of the valve body 1 can achieve normal closing control, while the "non-connected sealing" characteristic of the self-closing component 4 provides additional protection in non-use scenarios such as transportation and idleness. When an accidental collision causes the manual seal of the valve body 1 to fail, the self-closing component 4 can still remain closed, completely solving the leakage risk caused by external force opening during transportation in traditional single valve structures.

[0034] The following is a description of self-closing component 4:

[0035] The self-closing assembly 4 includes a retaining ring 401 detachably connected to the discharge connector 3. An mounting ring 402 is integrally formed at one end of the retaining ring 401 near the valve body 1. The inner diameter of the mounting ring 402 is smaller than the inner diameter of the retaining ring 401, providing a reliable reference for the subsequent sealing structure.

[0036] A movable ring 403 is axially inserted within the mounting ring 402, and several through-holes 404 are evenly spaced along the circumference of the side wall of the movable ring 403. When the movable ring 403 moves axially so that the through-holes 404 are completely outside the mounting ring 402, fuel can sequentially enter the central flow channel of the movable ring 403 through the feed connector 2, the fluid channel of the valve body 1, and the through-holes 404, and finally be delivered to the external stove oil circuit. When the through-holes 404 are completely retracted into the inner area of ​​the mounting ring 402, the inner wall of the mounting ring 402 completely covers the through-holes 404, achieving mechanical blockage of the oil circuit.

[0037] A limiting ring 405 is fixed at one end of the movable ring 403, located inside the connecting ring. The outer diameter of the limiting ring 405 is larger than the inner diameter of the mounting ring 402, thus achieving axial limiting. At the same time, after the oil pipe interface of the external stove is installed into the discharge connector 3, it can push the limiting ring 405, thereby realizing the axial movement of the movable ring 403.

[0038] The self-closing assembly 4 also includes a cover 406 fixed to the other end of the movable ring 403 and located outside the fixed ring 401. The outer diameter of the cover 406 is larger than the inner diameter of the mounting ring 402. A sealing ring 407 is coaxially fixed to the side of the cover 406 closest to the movable ring 403. The sealing ring is made of fluororubber resistant to alcohol media. A resilient reset structure 408 is connected between the side of the cover 406 furthest from the movable ring 403 and the valve body 1.

[0039] When the discharge connector 3 is not connected to the oil pipeline of the external stove, the elastic reset structure 408 is in an extended state, pushing the cover 406 to move away from the valve body 1, so that each port 404 is completely located in the inner area of ​​the mounting ring 402, and the end of the cover 406 and the end of the mounting ring 402 cooperate to compress the sealing ring 407 to form a radial seal. When the discharge connector 3 is connected to the oil pipeline of the stove, the end of the external pipeline pushes the limiting ring 405 to move towards the valve body 1, causing the movable ring 403 to move synchronously, so that the port 404 is completely moved out of the inner area of ​​the mounting ring 402. At this time, fuel can form a smooth oil passage through the port 404 and the central flow channel of the movable ring 403.

[0040] Employing a composite sealing method combining "mechanical shielding + elastic sealing," the physical blockage of the port 404 and the material sealing of the sealing ring 407 form a double layer of protection, reducing the leakage rate by more than 95% compared to a single sealing structure. Furthermore, the opening and closing response time of this structure is only 0.3 seconds, 40% faster than traditional valve core-type self-closing structures, allowing for rapid disconnection of the oil circuit and minimizing residual fuel leakage.

[0041] In this embodiment, the elastic reset structure 408 includes a positioning post 4081 fixed to the outer end of the cover 406, and a reset spring 4082 is sleeved on the positioning post 4081 to ensure that a stable thrust can be provided in the natural state so that the cover 406 fits tightly against the mounting ring 402.

[0042] In addition, the retaining ring 401 is detachably connected to the discharge connector 3 by a threaded connection. A sealing ring 5 is fixed on the outer ring of the retaining ring 401 and fits against the inner wall of the discharge connector 3. The sealing ring 5 is made of EPDM rubber, which is resistant to alcohol media, to block the path of fuel penetration along the thread gap.

[0043] Working principle:

[0044] During transportation (not connected to the stove): Valve body 1 is in the closed state, the return spring 4082 of the self-closing component 4 extends naturally, pushing the cover 406 to squeeze the sealing ring 407 and the mounting ring 402 to fit tightly. The opening 404 on the moving ring 403 is completely blocked by the mounting ring 402, forming a double seal, blocking the fuel flow path, and realizing self-closing.

[0045] When connected to the stove: the external stove oil pipeline pushes the limit ring 405, thereby driving the movable ring 403 to move towards the valve body 1, so that the port 404 is completely removed from the shielding range of the mounting ring 402, and the fuel flows through the port 404 and the movable ring 403 to ensure smooth fuel supply.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-closing connection valve for alcohol-based liquid fuel tanks, comprising a valve body (1) with an internal fluid passage, characterized in that, Also includes: Feed connector (2), the feed connector (2) is integrally formed on one side end of the valve body (1) and communicates with the fluid channel inside the valve body (1), and is used to connect with the oil pipeline of the external alcohol-based liquid fuel tank; Discharge connector (3), the discharge connector (3) is integrally formed on the other end of the valve body (1) and communicates with the fluid channel inside the valve body (1), and is used to connect with the oil pipeline of the external stove; The self-closing component (4) is embedded in the discharge connector (3). When the discharge connector (3) is not connected to the oil pipeline of the external stove, the self-closing component (4) is in a normally closed state; when the discharge connector (3) is connected to the oil pipeline of the external stove, the self-closing component (4) is in a normally open state. The self-closing component (4) includes a fixing ring (401) detachably connected to the discharge connector (3), and an mounting ring (402) integrally formed at one end of the fixing ring (401) near the valve body (1). The inner diameter of the mounting ring (402) is smaller than the inner diameter of the fixing ring (401). A movable ring (403) is axially inserted inside the mounting ring (402), and a number of through holes (404) are equally spaced along the circumferential direction on the side wall of the movable ring (403); a limiting ring (405) located inside the connecting ring is fixed at one end of the movable ring (403), and the outer diameter of the limiting ring (405) is larger than the inner diameter of the mounting ring (402); The self-closing assembly (4) also includes a cover (406) fixed to the other end of the movable ring (403) and located outside the fixed ring (401). A sealing ring (407) is coaxially fixed on the side of the cover (406) close to the movable ring (403). An elastic reset structure (408) is connected between the cover (406) and the valve body (1) on the side of the cover (406) away from the movable ring (403). When the discharge connector (3) is not connected to the oil pipeline of the external stove, the elastic reset structure (408) is in an extended state so that each port (404) is completely located in the inner area of ​​the mounting ring (402), and the cap (406) and the end of the mounting ring (402) cooperate to squeeze the sealing ring (407) to form a radial seal.

2. The self-closing connection valve for alcohol-based liquid fuel tanks according to claim 1, characterized in that: The elastic reset structure (408) includes a positioning post (4081) fixed to the outer end of the cover (406), and a reset spring (4082) is sleeved on the positioning post (4081).

3. The self-closing connection valve for alcohol-based liquid fuel tanks according to claim 1, characterized in that: The fixing ring (401) is detachably connected to the discharge connector (3) by a threaded connection. A sealing ring (5) that fits against the inner wall of the discharge connector (3) is fixed on the outer ring of the fixing ring (401).

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