Lpg and fuel dual mode switchover joint

Abstract

The utility model relates to the technical field of switching joint, concretely is LPG and fuel dual mode switching joint, including integrated valve body, be provided with engine export, LPG import and fuel import on the integrated valve body, be provided with valve seat in the integrated valve body, the valve core subassembly that rotates and is installed in the valve seat and extends to the engine export, the valve core subassembly includes the valve core that rotates and is installed in the valve seat, be provided with the flow channel in the valve core, the utility model solves the tedious problem that traditional switching needs to operate multiple valves, realizes one -key type quick switching, improves the leakproofness through double -sealed design, and reduces fuel residual mixture, improves the combustion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of switching connector technology, specifically an LPG and fuel dual-mode switching connector. Background Technology

[0002] An LPG / fuel dual-mode switch is a device used to switch between LPG (liquefied petroleum gas) and fuel oil, commonly found in dual-fuel vehicles or dual-fuel engines. Existing dual-fuel vehicles require complex valves to switch fuel lines, which presents the following problems: cumbersome switching operations requiring manual operation of multiple valves; poor sealing, leading to fuel leakage; and residual fuel mixing in the pipeline after switching, affecting combustion efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a dual-mode switching connector for LPG and fuel to solve the problems mentioned in the background art.

[0004] The technical solution of this utility model is: an LPG and fuel dual-mode switching connector, including an integrated valve body. The integrated valve body is provided with an engine outlet, an LPG inlet, and a fuel inlet. A valve seat is provided inside the integrated valve body. A valve core assembly extending into the engine outlet is rotatably installed in the valve seat. The valve core assembly includes a valve core rotatably installed in the valve seat. A flow guiding channel is provided inside the valve core. A sealing ring is provided on the contact surface between the valve core and the inner wall of the engine outlet. A spiral flow guiding groove is opened on the inner wall of the flow guiding channel at the engine outlet end. An end shaft is fixed to the end of the valve core away from the engine outlet. One end of the end shaft passes through the valve seat and is connected to a rotary drive component via a transmission connection.

[0005] The aforementioned components achieve the following effects: by integrating the engine outlet, LPG inlet, and fuel inlet into a single valve body, and cooperating with the valve core assembly (including the valve core, flow guide channel, and end shaft) rotatably mounted within the valve seat, when the rotary drive component rotates the end shaft, the flow guide channel within the valve core can precisely align with the LPG inlet and engine outlet (LPG mode) or the fuel inlet and engine outlet (fuel mode), achieving dual-fuel path switching controlled by a single component. Simultaneously, the sealing ring between the valve core and the inner wall of the engine outlet enhances contact sealing, and the spiral flow guide groove on the end side of the flow guide channel guides residual fuel for rapid discharge. These combined technical features solve the cumbersome problem of traditional switching requiring the operation of multiple valves, achieving one-button rapid switching. The dual-seal design improves sealing performance, reduces fuel residue mixing, and increases combustion efficiency.

[0006] Preferably, the engine outlet is connected to a one-way valve.

[0007] The effect achieved by the above components is as follows: the one-way valve connected to the engine outlet cooperates with the flow guide channel of the valve core assembly. When the valve core switches to close a certain fuel passage, the one-way valve can block the return of residual fuel in the engine outlet to that passage, which completely solves the problem of residual fuel mixing in the pipeline after switching in the traditional system, further improves the purity of fuel supply, and ensures combustion stability.

[0008] Preferably, both ends of the valve seat are provided with guide slopes for guiding the flow.

[0009] The aforementioned components achieve the following effect: the guide ramps at both ends of the valve seat cooperate with the inlet end of the guide channel of the valve core. When fuel flows in from the LPG inlet or fuel oil inlet, the guide ramps can guide the fuel smoothly into the guide channel along the ramps, reducing fuel flow resistance and turbulence. This structural combination reduces energy loss during fuel delivery and improves fuel supply efficiency, especially under high flow conditions.

[0010] Preferably, the rotary drive includes a housing disposed outside the integrated valve body, a servo motor is mounted on the housing, a drive gear is fixed to the output shaft of the servo motor, and a transmission gear fixed to the end shaft is meshed with one side of the drive gear.

[0011] The aforementioned components achieve the following effect: the servo motor of the rotary drive unit meshes with the transmission gear on the end shaft through a drive gear, forming a precise power transmission structure. This, in conjunction with the end shaft of the valve core assembly, enables controllable rotation of the valve core. Compared to traditional manual operation, this electric drive method improves the precision of the switching angle control, achieves automated and rapid switching, and can be linked with the vehicle ECU (via a position sensor) to lock the switching action when the engine is not turned off. This solves the safety hazards of traditional designs lacking anti-misoperation features and improves operational safety.

[0012] Preferably, the sealing ring includes a main sealing ring and an auxiliary sealing ring, wherein the main sealing ring is a fluororubber O-ring and the auxiliary sealing ring is a spring-loaded polytetrafluoroethylene sealing ring.

[0013] The effect achieved by the above components is as follows: the main sealing ring (fluororubber O-ring) and the auxiliary sealing ring (spring-loaded polytetrafluoroethylene sealing ring) cooperate with each other. The main sealing ring uses the resistance to LPG corrosion and elasticity of fluororubber to achieve basic sealing, and the auxiliary sealing ring compensates for the wear of the sealing surface through the spring preload, ensuring that the sealing performance is maintained after long-term use.

[0014] This invention provides an improved LPG and fuel dual-mode switching connector, which has the following improvements and advantages compared with the prior art:

[0015] Firstly, when the rotary drive component of this invention rotates the end shaft, the guide channel within the valve core can precisely align with the LPG inlet and engine outlet (LPG mode) or the fuel inlet and engine outlet (fuel mode), enabling a single component to control the switching of dual fuel pathways. Simultaneously, the sealing ring between the valve core and the inner wall of the engine outlet enhances contact sealing, and the spiral guide groove on the end side of the guide channel guides residual fuel for rapid discharge. These combined technical features solve the cumbersome problem of traditional switching requiring the operation of multiple valves, achieving one-button rapid switching. The dual-sealing design improves sealing performance, reduces fuel residue mixing, and increases combustion efficiency.

[0016] Secondly, this utility model uses a one-way valve connected to the engine outlet, which works in conjunction with the flow guide channel of the valve core assembly. When the valve core switches to close a certain fuel passage, the one-way valve can block the return of residual fuel in the engine outlet to that passage, thus completely solving the problem of residual fuel mixing in the pipeline after switching in traditional systems. This further improves the purity of fuel supply and ensures combustion stability. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional three-dimensional structural schematic diagram of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the rotary drive component in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Integrated valve body; 2. Engine outlet; 3. LPG inlet; 4. Fuel inlet; 5. Check valve; 6. Rotary drive component; 61. Servo motor; 62. Drive gear; 63. Transmission gear; 7. Valve core assembly; 71. Valve core; 72. Flow guide channel; 73. End shaft; 74. Sealing ring; 8. Spiral flow guide groove; 9. Valve seat; 10. Flow guide slope. Detailed Implementation

[0023] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] This utility model provides an improved LPG and fuel dual-mode switching connector. The technical solution of this utility model is as follows:

[0025] In embodiments of this utility model, such as Figure 1 - Figure 3 As shown, the LPG / fuel dual-mode switching connector includes an integrated valve body 1, which has an engine outlet 2, an LPG inlet 3, and a fuel inlet 4. The integrated valve body 1 integrates the engine outlet 2, LPG inlet 3, and fuel inlet 4 into one unit. A valve seat 9 is provided inside the integrated valve body 1, and a valve core assembly 7 extending into the engine outlet 2 is rotatably mounted inside the valve seat 9. Both ends of the valve seat 9 have guide ramps 10 for guiding flow. The guide ramps 10 at both ends of the valve seat 9 cooperate with the inlet end of the guide channel 72 of the valve core 71. When fuel flows in from the LPG inlet 3 or the fuel inlet 4, the guide ramps 10 can guide the fuel smoothly into the guide channel 72 along the ramps, reducing fuel flow resistance and turbulence. The valve core assembly 7 includes a valve core 71 rotatably mounted inside the valve seat 9. The valve core 71 is equipped with a flow guide channel 72. A sealing ring 74 is provided on the contact surface between the valve core 71 and the inner wall of the engine outlet 2. A spiral flow guide groove 8 is opened on the inner wall of the flow guide channel 72 at the end of the engine outlet 2. The sealing ring 74 between the valve core 71 and the inner wall of the engine outlet 2 enhances the contact sealing performance. The spiral flow guide groove 8 at the end of the flow guide channel 72 can guide the residual fuel to be discharged quickly. An end shaft 73 is fixed at the end of the valve core 71 away from the engine outlet 2. One end of the end shaft 73 passes through the valve seat 9 and the outer wall of the integrated valve body 1 and is connected to a rotary drive component 6. When the rotary drive component 6 drives the end shaft 73 to rotate, the flow guide channel 72 in the valve core 71 can accurately connect the LPG inlet 3 and the engine outlet 2 (LPG mode) or the fuel inlet 3 and the engine outlet 2 (fuel mode), realizing the switching of dual fuel passages controlled by a single component.

[0026] In an embodiment of this utility model, a one-way valve 5 is connected to the engine outlet 2. The one-way valve 5 connected to the engine outlet 2 cooperates with the flow guide channel 72 of the valve core assembly 7. When the valve core switches to close a certain fuel passage, the one-way valve 5 can block the residual fuel in the engine outlet 2 from flowing back to the passage, thus completely solving the problem of residual fuel mixing in the pipeline after switching in the traditional system.

[0027] In an embodiment of this invention, the rotary drive component 6 includes a housing disposed outside the integrated valve body 1. A servo motor 61 is mounted on the housing, and a drive gear 62 is fixed to the output shaft of the servo motor 61. A transmission gear 63 fixed on the end shaft 73 meshes with one side of the drive gear 62. The servo motor 61 of the rotary drive component 6 is driven by the drive gear 62 meshing with the transmission gear 63 on the end shaft 73, forming a precise power transmission structure. This structure cooperates with the end shaft 73 of the valve core assembly 7 to achieve controllable rotation of the valve core 71. Compared with traditional manual operation, this electric drive method improves the accuracy of switching angle control, realizes automated and rapid switching, and can be linked with the vehicle ECU (via a position sensor) to lock the switching action when the engine is not turned off.

[0028] In an embodiment of this utility model, the sealing ring 74 includes a main sealing ring and an auxiliary sealing ring. The main sealing ring is a fluororubber O-ring, and the auxiliary sealing ring is a spring-loaded polytetrafluoroethylene sealing ring. The main sealing ring (fluororubber O-ring) of the sealing ring 74 cooperates with the auxiliary sealing ring (spring-loaded polytetrafluoroethylene sealing ring). The main sealing ring utilizes the LPG corrosion resistance and elasticity of fluororubber to achieve basic sealing, and the auxiliary sealing ring compensates for the wear of the sealing surface through the spring preload.

[0029] The working principle of the LPG and fuel dual-mode switching connector provided by this utility model is as follows:

[0030] Initial state preparation: The integrated valve body 1 is in standby state, the flow channel 72 of the valve core assembly 7 is not connected to any fuel inlet, the one-way valve 5 is in the closed state, and the servo motor 61 of the rotary drive 6 is in the power-off lockout state.

[0031] LPG mode startup:

[0032] The vehicle ECU sends an LPG supply command, which powers the servo motor 61 of the rotary drive unit 6. Through the meshing of the drive gear 62 and the transmission gear 63, the end shaft 73 is driven to rotate.

[0033] The end shaft 73 drives the valve core 71 to rotate synchronously, so that the guide channel 72 inside the valve core 71 is precisely aligned with the LPG inlet 3 and the engine outlet 2;

[0034] The guide slopes 10 at both ends of the valve seat 9 guide LPG fuel from LPG inlet 3 through guide channel 72 to engine outlet 2. At this time, the one-way valve 5 opens under the action of fuel pressure.

[0035] The valve core 71 forms a seal with the sealing ring 74 (main sealing ring + auxiliary sealing ring) on ​​the inner wall of the engine outlet 2 to prevent LPG leakage;

[0036] The servo motor 61 triggers the self-locking mechanism, and the valve core 71 remains in the LPG passage open state, ensuring a stable supply of LPG fuel to the device.

[0037] Switch to fuel mode:

[0038] After the engine is turned off, the user triggers a switching command, and the servo motor 61 rotates 90° in the opposite direction, which drives the valve core 71 to reset through gear transmission.

[0039] The guide channel 72 is disconnected from the LPG inlet 3 and simultaneously connected to the fuel inlet 4 and the engine outlet 2. The spiral guide channel 8 guides the residual fuel in the LPG passage to be discharged through the engine outlet 2.

[0040] Fuel enters the guide channel 72 through the guide slope 10 of the valve seat 9, which pushes the one-way valve 5 to open and blocks the LPG residue backflow;

[0041] The sealing ring 74 reseals the fuel passage, and the servo motor 61 locks the valve core 71, completing the switch from LPG to fuel.

[0042] Anomaly protection process:

[0043] If the sealing ring 74 fails to seal and causes leakage, the system will detect the abnormal pressure and the servo motor 61 will immediately drive the valve core 71 to reset to the closed state.

[0044] One-way valve 5 automatically closes, cutting off the dual fuel supply and triggering an alarm signal to prevent the danger from escalating.

[0045] 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 LPG and fuel dual-mode switching connector, comprising an integrated valve body (1), wherein the integrated valve body (1) is provided with an engine outlet (2), an LPG inlet (3), and a fuel inlet (4), characterized in that: The integrated valve body (1) is provided with a valve seat (9), and a valve core assembly (7) extending into the engine outlet (2) is rotatably installed in the valve seat (9). The valve core assembly (7) includes a valve core (71) rotatably installed in the valve seat (9). A flow guide channel (72) is provided in the valve core (71). A sealing ring (74) is provided on the contact surface between the valve core (71) and the inner wall of the engine outlet (2). A spiral flow guide groove (8) is opened on the inner wall of the flow guide channel (72) at the end of the engine outlet (2). An end shaft (73) is fixed at the end of the valve core (71) away from the engine outlet (2). One end of the end shaft (73) passes through the valve seat (9) and is connected to a rotary drive (6) via a transmission connection to the outer wall of the integrated valve body (1).

2. The LPG and fuel dual-mode switching connector according to claim 1, characterized in that: The engine outlet (2) is connected to a one-way valve (5).

3. The LPG and fuel dual-mode switching connector according to claim 1, characterized in that: Both ends of the valve seat (9) are provided with guide slopes (10) for guiding the flow.

4. The LPG and fuel dual-mode switching connector according to claim 1, characterized in that: The rotary drive (6) includes a housing disposed outside the integrated valve body (1), a servo motor (61) is mounted on the housing, a drive gear (62) is fixed to the output shaft of the servo motor (61), and a transmission gear (63) fixed on the end shaft (73) meshes with one side of the drive gear (62).

5. The LPG and fuel dual-mode switching connector according to claim 1, characterized in that: The sealing ring (74) includes a main sealing ring and an auxiliary sealing ring. The main sealing ring is a fluororubber O-ring, and the auxiliary sealing ring is a spring-loaded polytetrafluoroethylene sealing ring.

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