Fuel switch assembly

Abstract

The utility model provides a kind of fuel switch assembly, belong to the field of automobile accessories.It solves the problem of sealing failure of existing fuel switch assembly.The fuel switch assembly, including control casing and fuel pipe body, fuel pipe body import and export are all connected with adapter, fuel pipe body is equipped with valve seat inside, the bottom of valve seat is equipped with through hole, valve seat side wall is equipped with side hole, control casing is equipped with control device inside, control casing is equipped with connecting seat inside, connecting seat and control device are cooperated and form oil cavity, control device includes guide sleeve, switch valve stem and drive cylinder, switch valve stem end is equipped with conical head, switch valve stem outside is equipped with limit ring, oil cavity is equipped with diaphragm inside, adapter includes fuel interface, connecting pipe and oil pressure sensor, connecting pipe is located inside adapter, annular cavity is formed between connecting pipe outside and adapter inner wall, annular cavity is connected with fuel interface, connecting pipe side wall is equipped with multiple through holes.The utility model has the advantages of simple structure and real-time monitoring.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts and relates to a fuel switch, and more particularly to a fuel switch assembly. Background Technology

[0002] A fuel switch is a mechanical device used to control the gasoline lines of a motorcycle. It controls the opening and closing of the fuel line and the switching of the fuel tank by rotating a handle.

[0003] Current fuel switch assemblies generally suffer from four major technical bottlenecks: short lifespan of valve stem dynamic seals, easy wear and aging of O-rings / packings, low oil pressure monitoring accuracy, external sensors are subject to eddy current interference and have slow response, poor drive reliability, and high leakage risk due to split structure. These bottlenecks lead to frequent seal failures, slow control response, and high maintenance costs in traditional products under high pressure, high temperature, or high frequency conditions, which seriously restricts the safety and intelligent development of fuel systems. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a fuel switch assembly to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: a fuel switch assembly, including a control housing and a fuel pipe body, wherein the control housing and the fuel pipe body are integral structures and interconnected, characterized in that adapters are externally connected at the inlet and outlet of the fuel pipe body, a valve seat is provided inside the fuel pipe body, a through hole is opened at the bottom of the valve seat, a side hole communicating with the fuel pipe body is provided on the side wall of the valve seat, and a control device for controlling fuel flow is provided inside the control housing; The control housing is provided with a connecting seat inside, and the connecting seat cooperates with the control device to form an oil chamber, which is connected to the fuel pipe body; The control device includes a guide sleeve fixedly connected to the connecting seat, a switch valve stem disposed inside the guide sleeve and capable of axial displacement, and a drive cylinder for driving the switch valve stem to move axially, wherein the transmission end of the drive cylinder is fixedly connected to the switch valve stem. The valve stem end is provided with a tapered head, which cooperates with the through hole to realize fuel flow and blockage. The lower end of the valve stem is provided with a limiting ring. The oil cavity is equipped with a diaphragm, and the limiting ring and the connecting seat are respectively embedded at both ends of the diaphragm; The adapter includes a fuel inlet, a connecting pipe, and a fuel pressure sensor. The connecting pipe is located inside the adapter, and an annular cavity is formed between the outer side of the connecting pipe and the inner wall of the adapter. The annular cavity is connected to the fuel inlet, and multiple through holes are evenly opened circumferentially on the side wall of the connecting pipe. In this system, the valve body is axially displaced by a drive cylinder, and the tapered head at its end cooperates with the through hole of the valve seat to form a blockage or flow, thereby realizing the automatic switching of fuel flow.

[0006] In one of the aforementioned fuel switch assemblies, the diaphragm is made of an elastic sealing material.

[0007] In the aforementioned fuel switch assembly, the number of through holes on the side wall of the connecting pipe is 4-8, and they are evenly distributed circumferentially on the outside of the connecting pipe.

[0008] In the aforementioned fuel switch assembly, the fuel pressure sensor is a piezoelectric sensor used to detect fuel pressure values ​​in real time, and the drive cylinder is a pneumatic cylinder.

[0009] Compared with existing technologies, this fuel switch assembly achieves precise fuel opening and closing through pneumatic drive and conical seal. Combined with an isolated oil chamber and integrated oil pressure sensor, it has significant advantages in sealing performance, monitoring accuracy and maintainability, and is suitable for high-requirement fuel control systems. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the fuel switch assembly.

[0011] Figure 2 This is a half-section structural diagram of the fuel switch assembly.

[0012] In the diagram, 1. Control housing; 2. Fuel pipe body; 3. Adapter; 4. Valve seat; 5. Through hole; 6. Side hole; 7. Connecting seat; 8. Oil chamber; 9. Guide sleeve; 10. Switch valve stem; 11. Drive cylinder; 12. Conical head; 13. Limiting ring; 14. Fuel interface; 15. Connecting pipe; 16. Oil pressure sensor; 17. Ring cavity; 18. Through hole; 19. Diaphragm. Detailed Implementation

[0013] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0014] like Figure 1 , Figure 2As shown, this fuel switch assembly includes a control housing 1 and a fuel pipe 2. The control housing 1 and the fuel pipe 2 are an integral structure and interconnected. An adapter 3 is externally connected to both the inlet and outlet of the fuel pipe 2. A valve seat 4 is provided inside the fuel pipe 2, with a through hole 5 at the bottom. A side hole 6 communicating with the fuel pipe 2 is provided on the side wall of the valve seat 4. A control device for controlling fuel flow is provided inside the control housing 1. A connecting seat 7 is provided inside the control housing 1, and the connecting seat 7 cooperates with the control device to form an oil chamber 8, which is connected to the fuel pipe 2. The control device includes a guide sleeve 9 fixedly connected to the connecting seat 7, a switch valve stem 10 located inside the guide sleeve 9 and capable of axial displacement, and a drive cylinder 11 for driving the switch valve stem 10 axially. The transmission end of the drive cylinder 11 is fixedly connected to the switch valve stem 10. The valve stem 10 has a tapered head 12 at its end, which cooperates with the through hole 5 to realize fuel flow and blockage. The lower end of the valve stem 10 has a limiting ring 13 on its outer side, and the oil chamber 8 has a diaphragm 19 inside. The two ends of the diaphragm 19 are respectively embedded in the limiting ring 13 and the connecting seat 7. The adapter 3 includes a fuel interface 14, a connecting pipe 15 and an oil pressure sensor 16. The connecting pipe 15 is located inside the adapter 3, and an annular cavity 17 is formed between the outer side of the connecting pipe 15 and the inner wall of the adapter 3. The annular cavity 17 is connected to the fuel interface 14. Multiple through holes 18 are evenly opened on the side wall of the connecting pipe 15. The valve body is axially displaced by the driving cylinder 11, and the tapered head 12 at its end cooperates with the through hole 5 of the valve seat 4 to form blockage or flow, thereby realizing the automatic switching of fuel flow.

[0015] The diaphragm 19 is made of an elastic sealing material. The connecting pipe 15 has 4-8 through holes 18 on its sidewall, evenly distributed circumferentially on the outside of the connecting pipe 15. The oil pressure sensor 16 is a piezoelectric sensor used to detect fuel pressure values ​​in real time, and the drive cylinder 11 is a pneumatic cylinder.

[0016] Working principle The drive cylinder 11 pushes the switch valve stem 10 to move axially. The conical head 12 at the end of the valve stem forms a conical sealing fit with the through hole 5 at the bottom of the valve seat 4. When the conical head 12 is inserted into the through hole 5, it blocks the flow of fuel. When the conical head 12 is disengaged from the through hole 5, the fuel flows through the side hole 6 of the valve seat 4, the through hole 5, and the fuel pipe 2. The limit ring 13 restricts the valve stem stroke to ensure sealing reliability.

[0017] Fuel enters the annular cavity 17 (the space between the inner wall of the adapter 3 and the connecting pipe 15) from the fuel inlet 14. Fuel then enters the interior of the connecting pipe 15 through the circumferential through-hole 18 on the side wall, achieving pressure equalization. The oil pressure sensor 16 (piezoelectric type) monitors the pressure in the annular cavity 17 in real time and provides feedback on the fuel system status. A diaphragm 19 (elastic material) is embedded between the limiting ring 13 and the connecting seat 7, dividing the oil chamber 8 into upper and lower chambers. The upper chamber is connected to the drive cylinder 11 and withstands air pressure, while the lower chamber is connected to the fuel pipe 2 and contacts the fuel. The diaphragm 19 prevents fuel from seeping into the pneumatic system, achieving gas-liquid isolation and sealing.

[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A fuel switch assembly, comprising a control housing (1) and a fuel line (2), wherein the control housing (1) and the fuel line (2) are integrally formed and interconnected, characterized in that, An adapter (3) is connected to the inlet and outlet of the fuel pipe (2). A valve seat (4) is provided inside the fuel pipe (2). A through hole (5) is opened at the bottom of the valve seat (4). A side hole (6) connected to the fuel pipe (2) is provided on the side wall of the valve seat (4). A control device for controlling the flow of fuel is provided inside the control housing (1). The control housing (1) is provided with a connecting seat (7) inside. The connecting seat (7) cooperates with the control device to form an oil chamber (8). The oil chamber (8) is connected to the fuel pipe body (2). The control device includes a guide sleeve (9) fixedly connected to the connecting seat (7), a switch valve rod (10) disposed inside the guide sleeve (9) and capable of axial displacement, and a drive cylinder (11) for driving the switch valve rod (10) to move axially. The transmission end of the drive cylinder (11) is fixedly connected to the switch valve rod (10). The end of the switch valve stem (10) is provided with a tapered head (12), which cooperates with the through hole (5) to realize fuel flow and blockage. The lower end of the switch valve stem (10) is provided with a limiting ring (13). The oil cavity (8) is provided with a diaphragm (19), and the limiting ring (13) and the connecting seat (7) are respectively embedded at both ends of the diaphragm (19). The adapter (3) includes a fuel inlet (14), a connecting pipe (15), and an oil pressure sensor (16). The connecting pipe (15) is located inside the adapter (3). An annular cavity (17) is formed between the outside of the connecting pipe (15) and the inner wall of the adapter (3). The annular cavity (17) is connected to the fuel inlet (14). Multiple through holes (18) are evenly opened on the side wall of the connecting pipe (15). In this process, the valve body is axially displaced by the drive cylinder (11), and the conical head (12) at its end cooperates with the through hole (5) of the valve seat (4) to form a blockage or flow, thereby realizing the automatic switching of fuel flow.

2. The fuel switch assembly according to claim 1, characterized in that, The diaphragm (19) is made of an elastic sealing material.

3. The fuel switch assembly according to claim 1, characterized in that, The number of through holes (18) on the side wall of the connecting pipe (15) is 4-8, and they are evenly distributed around the outside of the connecting pipe (15).

4. A fuel switch assembly according to claim 1, characterized in that, The oil pressure sensor (16) is a piezoelectric sensor used to detect fuel pressure values ​​in real time, and the drive cylinder (11) is a pneumatic cylinder.

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