A special connector for alcohol-based liquid fuel tanks

Abstract

This utility model relates to the technical field of low-pressure or atmospheric-pressure vessel accessories, specifically a special connector for alcohol-based liquid fuel tanks, comprising: a hollow rod, one end of which is fixed with a limiting ring; a filter element, detachably connected to the limiting ring; a connecting sleeve, which is movably fitted onto the outer wall of the hollow rod; a locking nut, which covers the periphery of the limiting ring and is threadedly connected to the connecting sleeve; and a sealing ring, which is fixedly fitted onto the outer wall of the limiting ring and fits against the inner wall of the locking nut. This utility model adds a special connector between the alcohol-based liquid fuel tank and the stove's oil circuit. This connector, composed of a hollow rod, limiting ring, filter element, connecting sleeve, locking nut, and sealing ring, filters fuel as it enters the stove's oil circuit from the alcohol-based liquid fuel tank, preventing impurities and sediments from entering the oil circuit, thereby solving problems such as oil circuit blockage and reduced stove lifespan.

Description

Technical Field

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

[0002] In existing technologies, the connection between alcohol-based liquid fuel tanks and stove oil circuits is usually achieved through direct docking. Specifically, the outlet of the alcohol-based liquid fuel tank is generally equipped with an external threaded interface, while the inlet of the stove oil circuit is equipped with a connector with an internal thread. By tightening the internal thread of the stove oil circuit connector with the external thread of the fuel tank outlet, a sealed connection is formed between the two.

[0003] However, during storage, alcohol-based liquid fuels are prone to developing impurities and sediments (such as condensed heavy components and fine particulate matter) inside the tank due to the fuel's inherent characteristics or external environmental influences. Directly connected structures lack effective filtration devices. When the stove is operating, the fuel pump draws fuel from the tank through the oil circuit, and these impurities and sediments are drawn out along with the fuel, entering the stove's oil circuit system. Over time, these impurities and sediments gradually accumulate in the oil pipes, stove oil circuits, and nozzles, causing blockages and hindering fuel delivery, thus affecting the stove's normal combustion efficiency. Therefore, we have proposed a special connector for alcohol-based liquid fuel tanks to effectively solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a special connector for alcohol-based liquid fuel tanks, which solves the problem mentioned in the background art that in the prior art, alcohol-based liquid fuel tanks are directly connected to the oil circuit of the stove, and impurities and sediments can easily enter the oil circuit of the stove.

[0005] This utility model is achieved through the following technical solution: a special connector for alcohol-based liquid fuel tanks, comprising:

[0006] A hollow rod, one end of which is fixed with a limiting ring, the outer diameter of which is larger than the outer diameter of the hollow rod;

[0007] The filter element is detachably connected to the limiting ring and is cylindrical and extends into the hollow rod.

[0008] A connecting sleeve is movably fitted onto the outer wall of the hollow rod, and the inner diameter of the connecting sleeve is smaller than the outer diameter of the limiting ring.

[0009] A locking nut, wherein the locking nut cover is disposed around the limiting ring and is threadedly connected to the connecting sleeve;

[0010] A sealing ring is fixedly fitted onto the outer wall of the limiting ring and fits against the inner wall of the locking nut.

[0011] Optionally, a first connector is fixed to the end of the hollow rod away from the limiting ring, and the first connector is used to connect to the oil circuit of an external stove.

[0012] Optionally, a second connector is fixed to the end of the locking nut away from the connecting sleeve, the second connector being used to connect to an external alcohol-based fuel tank.

[0013] Optionally, an annular groove is provided on the outer wall of the hollow rod, and a retaining spring is embedded in the annular groove.

[0014] Optionally, the filter element includes a filter cylinder threadedly connected to a limiting ring, with a liquid outlet at the upper end of the filter cylinder and an annular gap between the filter cylinder and the hollow rod.

[0015] Optionally, the connecting sleeve has several positioning grooves evenly spaced along the circumference at one end near the limiting ring, and a positioning protrusion that matches each positioning groove is fixed at one end of the limiting ring near the connecting sleeve.

[0016] Compared with the prior art, this utility model provides a special connector for alcohol-based liquid fuel tanks, which has the following advantages:

[0017] This invention adds a special connector between the alcohol-based liquid fuel tank and the stove's oil circuit. The connector consists of a hollow rod, a limiting ring, a filter element, a connecting sleeve, a locking nut, and a sealing ring. It can filter the fuel as it enters the stove's oil circuit from the alcohol-based liquid fuel tank, preventing impurities and sediments from entering the oil circuit, thereby solving problems such as oil circuit blockage and affecting the lifespan of the stove. Attached Figure Description

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

[0019] Figure 2 This is an exploded view of the present invention;

[0020] Figure 3 This is a schematic diagram of the hollow rod of this utility model;

[0021] Figure 4 This is a schematic diagram of the filter element of this utility model;

[0022] Figure 5 This is a schematic diagram of the positioning groove of this utility model;

[0023] Figure 6 This is a schematic diagram of the positioning protrusion of this utility model.

[0024] In the diagram: 1. Hollow rod; 2. Limiting ring; 3. Filter element; 301. Filter cartridge; 302. Liquid outlet; 4. Connecting sleeve; 5. Locking nut; 6. Sealing ring; 7. First connector; 8. Second connector; 9. Annular groove; 10. Snap ring; 11. Positioning groove; 12. Positioning protrusion. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1 to 6 A special connector for alcohol-based liquid fuel tanks includes: a hollow rod 1, a filter element 3, a connecting sleeve 4, a locking nut 5, and a sealing ring 6.

[0027] Specifically, a limiting ring 2 is fixed to one end of the hollow rod 1. The outer diameter of the limiting ring 2 is larger than the outer diameter of the hollow rod 1 so that the limiting ring 2 and the hollow rod 1 cooperate to form a stepped structure. When the limiting ring 2 is sandwiched between the connecting sleeve 4 and the locking nut 5, it can axially limit the hollow rod 1 and prevent the hollow rod 1 from moving axially.

[0028] In this embodiment, a first connector 7 is fixed at the end of the hollow rod 1 away from the limiting ring 2. The first connector 7 is hollow inside and has an external thread on its outer wall. The first connector 7 is used to connect with the oil circuit of the external stove so that the hollow rod 1 is connected to the oil circuit of the external stove.

[0029] Furthermore, an annular groove 9 is formed on the outer wall of the hollow rod 1, and a retaining spring 10 is embedded in the annular groove 9. When the first connector 7 is connected to the external stove oil circuit by threaded connection, the retaining spring 10 will form a snap-fit ​​engagement with the corresponding groove on the inner wall of the external stove oil circuit. The elastic deformation of the retaining spring 10 generates a radial restraining force, effectively limiting the axial displacement between the hollow rod 1 and the external stove oil circuit. This design compensates for the risk of loosening caused by factors such as vibration and fluctuations in alcohol-based fuel pressure that may occur with a simple threaded connection, further improving the stability and reliability of the connection between the two, ensuring that the connector and the stove oil circuit always maintain a precise relative position during long-term use, and avoiding the impact of axial movement on sealing performance or filtration effect.

[0030] In addition, the filter element 3 is detachably connected to the limiting ring 2. The filter element 3 is cylindrical and extends into the hollow rod 1. Specifically, the filter element 3 includes a filter cylinder 301 threadedly connected to the limiting ring 2. The threaded connection not only provides a stable connection and can withstand the impact force when the alcohol-based fuel flows, but also allows for easy disassembly and assembly by rotation, making the operation simple and efficient. The upper end of the filter cylinder 301 has a liquid outlet 302, and an annular gap is left between the filter cylinder 301 and the hollow rod 1. This gap design provides a guiding channel for the flow of alcohol-based fuel. The alcohol-based liquid fuel enters the filter cylinder 301 through the liquid outlet 302, and after being filtered by the filter cylinder 301, it flows smoothly along the annular gap to the outer periphery of the filter cylinder 301, and then enters the stove oil circuit through the hollow rod 1 and the first connector 7.

[0031] It should be added that the connecting sleeve 4 is movably fitted onto the outer wall of the hollow rod 1, and the inner diameter of the connecting sleeve 4 is smaller than the outer diameter of the limiting ring 2. This size design ensures that when the connecting sleeve 4 moves on the hollow rod 1, it is blocked by the limiting ring 2, thus stably locking it below the limiting ring 2. This prevents the connecting sleeve 4 from moving upwards and detaching from the hollow rod 1, and also provides a stable support foundation for subsequent engagement with the locking nut 5. The locking nut 5 covers the periphery of the limiting ring 2 and is threadedly connected to the connecting sleeve 4. When the locking nut 5 and the connecting sleeve 4 are tightened, they clamp and fix the limiting ring 2 from both the top and bottom, firmly locking the limiting ring 2 in the preset position, thereby ensuring the stability of the entire connecting structure and preventing relative displacement of the components under the influence of alcohol-based fuel pressure or external vibration.

[0032] In this embodiment, a second connector 8 is fixed to the end of the locking nut 5 away from the connecting sleeve 4. The second connector 8 is hollow inside. An external thread is provided on the outer wall of the second connector 8. The second connector 8 is used to connect to an external alcohol-based fuel tank, and the threaded connection method facilitates installation and disassembly, meeting the assembly requirements in actual use.

[0033] To prevent leakage of alcohol-based fuel, the sealing ring 6 is fixedly fitted onto the outer wall of the limiting ring 2 and fits against the inner wall of the locking nut 5. This design effectively fills the gap between the locking nut 5 and the limiting ring 2, forming a reliable sealing barrier through the elastic deformation of the sealing ring 6. This seals the junction between the locking nut 5 and the limiting ring 2, preventing alcohol-based fuel from leaking from this point during circulation, further improving the sealing performance of the connector, and ensuring the safety of alcohol-based fuel use.

[0034] In another embodiment of this application, to further improve the stability of the connection between the connecting sleeve 4 and the hollow rod 1 and to prevent relative rotation between the two during assembly or use, a plurality of positioning grooves 11 are provided at equal intervals along the circumference at one end of the connecting sleeve 4 near the limiting ring 2, and a positioning protrusion 12 that matches each positioning groove 11 is fixed at one end of the limiting ring 2 near the connecting sleeve 4. When the connecting sleeve 4 is fitted along the outer wall of the hollow rod 1 and moved below the limiting ring 2, the positioning protrusion 12 will accurately align and insert into the corresponding positioning groove 11, forming a circumferential constraint through the mechanical interlocking of the concave and convex structures. This design effectively limits the relative rotation between the connecting sleeve 4 and the hollow rod 1: on the one hand, when tightening or loosening the locking nut 5, the connecting sleeve 4 will not rotate synchronously with the rotation of the locking nut 5, ensuring smoother and less strenuous threaded connection operation; on the other hand, during long-term use, even when subjected to the impact of alcohol-based fuel flow or external vibration, the connecting sleeve 4 and the hollow rod 1 can remain relatively stationary, avoiding component wear caused by rotation, further enhancing the stability and reliability of the entire connecting structure, and extending its service life.

[0035] In this embodiment, it should be noted that the hollow rod 1, the limiting ring 2, the filter element 3, the connecting sleeve 4, and the locking nut 5 are all made of stainless steel. Stainless steel has excellent corrosion resistance, high strength, and good sealing properties, which can effectively resist the erosion of alcohol-based fuels, avoid structural failure or leakage risks caused by material deterioration during long-term use, and ensure that each component has sufficient structural stability and durability during assembly and operation, thus extending the overall service life of the connectors.

[0036] Working principle:

[0037] During installation, the connecting sleeve 4 is first movably fitted onto the outer wall of the hollow rod 1. Since the inner diameter of the connecting sleeve 4 is smaller than the outer diameter of the limiting ring 2, the connecting sleeve 4 will naturally be locked below the limiting ring 2. At this time, the positioning groove 11 at the end of the connecting sleeve 4 near the limiting ring 2 is precisely aligned with the positioning protrusion 12 on the limiting ring 2. The positioning protrusion 12 is inserted into the positioning groove 11, forming a circumferential constraint to prevent relative rotation between the connecting sleeve 4 and the hollow rod 1.

[0038] Next, the filter element 3 is installed in the limiting ring 2 through a threaded connection to ensure that the filter element 3 is stably inserted into the hollow rod 1, and that there is an annular gap between the filter cylinder 301 and the hollow rod 1.

[0039] Next, the locking nut 5 is placed over the outer edge of the limiting ring 2, so that the locking nut 5 and the connecting sleeve 4 are tightened through the thread connection. The two work together to clamp and fix the limiting ring 2. At the same time, the sealing ring 6 is tightly fitted to the inner wall of the locking nut 5, so as to achieve a seal at the junction of the locking nut 5 and the limiting ring 2.

[0040] After the connector is assembled, it is connected to the external stove oil circuit through the external thread on the outer wall of the first connector 7, so that the hollow rod 1 is connected to the external stove oil circuit; it is connected to the external alcohol-based fuel tank through the external thread on the outer wall of the second connector 8, so as to ensure that the entire connector is installed in place.

[0041] During use, the fuel in the alcohol-based fuel tank enters the filter cartridge 301 through the second connector 8 and the outlet 302, is filtered by the filter cartridge 301, enters the hollow rod 1, and finally enters the stove oil circuit through the first connector 7.

[0042] When the filter element 3 needs cleaning or replacement, loosen the locking nut 5 to separate it from the connecting sleeve 4, and then remove the filter element 3 from the limiting ring 2. After cleaning or replacement, reassemble according to the above installation steps to continue use.

[0043] 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.

[0044] 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. An alcohol-based liquid fuel tank-specific connector characterized by comprising: include: A hollow rod (1) is provided, with a limiting ring (2) fixed at one end of the hollow rod (1), the outer diameter of which is larger than the outer diameter of the hollow rod (1). The filter element (3) is detachably connected to the limiting ring (2). The filter element (3) is cylindrical and extends into the hollow rod (1). Connecting sleeve (4), the connecting sleeve (4) is movably sleeved on the outer wall of the hollow rod (1), and the inner diameter of the connecting sleeve (4) is smaller than the outer diameter of the limiting ring (2); Locking nut (5), the locking nut (5) is placed around the limiting ring (2) and threadedly connected to the connecting sleeve (4); A sealing ring (6) is fixedly sleeved on the outer wall of the limiting ring (2) and fits against the inner wall of the locking nut (5).

2. An alcohol-based liquid fuel tank specific connector according to claim 1, characterized in that: The hollow rod (1) is fixed with a first connector (7) at the end away from the limiting ring (2), and the first connector (7) is used to connect to the oil circuit of the external stove.

3. An alcohol-based liquid fuel tank specific connector according to claim 1, characterized in that: The locking nut (5) is fixed with a second connector (8) at the end away from the connecting sleeve (4). The second connector (8) is used to connect to an external alcohol-based liquid fuel tank.

4. The alcohol-based liquid fuel tank specific connector according to claim 1, characterized in that: An annular groove (9) is provided on the outer wall of the hollow rod (1), and a retaining spring (10) is embedded in the annular groove (9).

5. The alcohol-based liquid fuel tank specific connector according to claim 1, characterized in that: The filter element (3) includes a filter cylinder (301) threadedly connected to the limiting ring (2), and the upper end of the filter cylinder (301) is provided with a liquid outlet (302). An annular gap is left between the filter cylinder (301) and the hollow rod (1).

6. A special connector for alcohol-based liquid fuel tanks according to claim 1, characterized in that: The connecting sleeve (4) has several positioning grooves (11) evenly spaced along the circumference at one end near the limiting ring (2), and a positioning protrusion (12) that matches each positioning groove (11) is fixed at one end of the limiting ring (2) near the connecting sleeve (4).

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