Fuel tank isolating valve with noise reduction function
By setting sealed rubber pads, buffer pads and shock absorbing pads in the fuel tank isolation valve, combined with the solenoid shell and the plastic-encapsulated shell structure, the noise problem during the isolation valve is solved, and effective noise reduction and stability of electromagnetic components are achieved. Sex improvement.
Patent Information
- Application Number
- CN202420079125.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-12
AI Technical Summary
During the working process, the existing fuel tank isolation valves generate a magnetic field due to the energization of the solenoid coil, which causes the iron core and the magnetic conduction core to attract each other, resulting in impact sound and noise, and affecting the stability of the fixed structure.
A fuel tank isolation valve with noise reduction function was designed. By installing a sealed rubber pad at the bottom of the upper valve head and a buffer pad at the top of the moving iron core, the electromagnetic component adopts a structure that combines the electromagnetic shell and the plastic case, and in A shock absorbing pad is provided between the mounting hole and the metal bushing to slow down vibration between the isolation valve and the bracket, thereby reducing noise.
It effectively reduces the noise of the isolation valve during the working process, improves the stability of the electromagnetic assembly, and slows down the vibration between the isolation valve and the bracket through the shock absorber pad, improving assembly efficiency and vehicle driving safety.
Smart Images
Figure CN222316084U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of isolation valves, and particularly relates to a fuel tank isolation valve with a noise reduction function. Background Art
[0002] In the prior art, the fuel tank isolation valve is one of the most commonly used parts of automobiles. It mainly serves to isolate the fuel tank and the fuel system. Its main function is to automatically cut off the air intake when a collision or other external force impact occurs to avoid fire and environmental pollution caused by fuel overflow. In addition, the fuel tank isolation valve can also protect important fuel system components such as the fuel pump and fuel filter.
[0003] The fuel tank isolation valve adopts the electromagnetic control principle. When a collision or external force impact occurs, the controller will immediately issue a command to close the valve between the fuel tank and the fuel system. In this way, the pressure in the fuel pump and the fuel pipeline can be preserved, avoiding fuel leakage and ensuring the safety of vehicle driving. Its shortcomings are: when the isolation valve is working, the electromagnetic coil generates a magnetic field after being energized, causing the iron core and the magnetic core to magnetize and attract each other, and the two iron parts attract each other and produce a collision sound; when the car is driving on a bumpy road, the collision and friction between the isolation valve and the fixed bracket will not only generate noise, but also affect the stability of the fixed structure. Utility Model Content
[0004] The utility model aims to provide a fuel tank isolation valve with a noise reduction function, which can effectively reduce the noise generated by the isolation valve during operation.
[0005] The purpose of the utility model is achieved as follows: a fuel tank isolation valve with a noise reduction function, comprising a valve housing with a cavity, the valve housing comprising a truncated cone that divides the cavity into an upper tube cavity and a lower tube cavity, a fuel tank pipeline joint connected to the upper tube cavity and a charcoal canister pipeline joint connected to the lower tube cavity, a vent hole is opened at the center of the truncated cone, an electromagnetic component is arranged corresponding to the top of the valve housing, the electromagnetic component comprises a hollow support frame, a coil is wound on the outside of the support frame, an electromagnetic shell is arranged on the outside of the coil, and the inner and outer sides of the electromagnetic shell are connected by A plastic shell is injection molded by plastic process, a moving iron core is arranged inside the support frame, a buffer pad is arranged on the top of the moving iron core, an upper valve head assembly that can move up and down in the upper tube cavity is arranged on the bottom of the moving iron core, the upper valve head assembly includes an upper valve head, a sealing rubber pad is arranged on the side of the upper valve head facing the truncated cone, a lower valve head assembly that can move up and down is arranged in the valve shell corresponding to the lower tube cavity, a plurality of mounting ears are arranged on the outside of the valve shell, mounting holes are opened on the mounting ears, and shock-absorbing pads and metal bushings are arranged on the mounting holes from the outside to the inside.
[0006] When the utility model is used, the isolation valve is installed on the bracket by fasteners through the metal bushing; when the coil is not energized, the sealing rubber pad abuts against the truncated cone to block the vent hole; after the coil is energized, the iron core drives the upper valve head to the upper limit, and at this time the buffer pad abuts against the magnetic core. Compared with the prior art, the beneficial effects of the utility model are: by arranging a sealing rubber pad at the bottom of the upper valve head, it can not only prevent the valve body from leaking, but also reduce the noise generated when the upper valve head abuts against the truncated cone; by arranging a buffer pad at the top of the moving iron core, the magnetic core first contacts the buffer pad, which plays a buffering role on the attraction of the moving iron core, reduces the impact force and impact speed of the moving iron core, and thus reduces the noise; the electromagnetic assembly adopts a structure combining an electromagnetic shell and a plastic-coated shell, which can effectively reduce the noise generated by the moving iron core when it moves; by arranging a shock-absorbing pad between the mounting hole and the metal bushing, the vibration between the isolation valve and the bracket can be slowed down, thereby reducing the noise.
[0007] As a further improvement of the present invention, the electromagnetic assembly further comprises a sleeve, the moving iron core can move up and down in the sleeve, and the sleeve is provided with a limiting portion protruding upward corresponding to the buffer pad.
[0008] As a further improvement of the utility model, the upper valve head assembly also includes an upper spring, the upper end of the upper spring is sleeved on the electromagnetic assembly, and the lower end of the upper spring is sleeved on the upper valve head.
[0009] As a further improvement of the utility model, the lower valve head assembly includes a lower valve head, a lower spring and a valve seat. The top of the lower valve head passes through the vent hole and abuts against the upper valve head. The upper end of the lower spring is sleeved on the lower valve head, and the lower end of the lower spring is arranged on the valve seat.
[0010] As a further improvement of the utility model, the angle between the plane where the fuel tank pipeline joint is located and the plane where the charcoal canister pipeline joint is located is 180°.
[0011] As a further improvement of the utility model, the cross section of the shock-absorbing pad is an I-shaped structure with annular grooves on the front and rear sides, and the cross section of the metal bushing is a T-shaped structure with a threaded through hole at the center.
[0012] As a further improvement of the utility model, a reinforcing rib is provided between the mounting ear and the valve body.
[0013] As a further improvement of the utility model, the valve housing, the mounting ears and the reinforcing ribs are made of PA66+GF30 material in one piece.
[0014] As a further improvement of the utility model, the electromagnetic component controls the upper valve head component to move closer to or away from the table to block or open the vent hole, and when blocking, the upper valve head component and the table form a first sealing surface; the lower valve head component moves closer to or away from the upper valve head component to block or open the vent hole, and when blocking, a second sealing surface is formed between the lower valve head component and the upper valve head component. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0016] Figure 2 It is a top view of the utility model.
[0017] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.
[0018] Figure 4 It is a cross-sectional view of the mounting ear of the utility model.
[0019] Among them, 1 valve housing, 101 round table, 102 fuel tank pipeline connector, 103 carbon canister pipeline connector, 104 vent, 105 mounting ear, 106 reinforcing rib, 2 electromagnetic assembly, 201 support frame, 202 coil, 203 electromagnetic housing, 204 plastic shell, 205 sleeve, 206 moving iron core, 207 buffer pad, 3 upper valve head assembly, 301 upper valve head, 302 upper spring, 303 sealing rubber pad, 4 lower valve head assembly, 401 lower valve head, 402 lower spring, 403 valve seat, 5 shock-absorbing pad, 501 annular groove, 6 metal bushing. DETAILED DESCRIPTION
[0020] like Figure 1-3As shown, a fuel tank isolation valve with a noise reduction function includes a valve housing 1 with a cavity therein, the valve housing 1 includes a truncated cone 101 that divides the cavity into an upper tube cavity and a lower tube cavity, a fuel tank pipeline connector 102 connected to the upper tube cavity, and a carbon canister pipeline connector 103 connected to the lower tube cavity. Preferably, the angle between the plane where the fuel tank pipeline connector 102 is located and the plane where the carbon canister pipeline connector 103 is located is 180°; a vent hole 104 is opened at the center of the truncated cone 101, and an electromagnetic component 2 is correspondingly arranged on the top of the valve housing 1. The electromagnetic component 2 controls the upper valve head component 3 to approach or move away from the truncated cone 101 to block or open the vent hole 104. When blocking, the upper valve head component 3 The valve head assembly 3 and the frustum 101 form a first sealing surface; a lower valve head assembly 4 that can move up and down is arranged in the lower tube cavity, and the lower valve head assembly 4 approaches or moves away from the upper valve head assembly 3 to block or open the vent 104. When blocking, a second sealing surface is formed between the lower valve head assembly 4 and the upper valve head assembly 3; two mounting ears 105 are arranged on the outer side of the valve housing 1, and mounting holes are opened on the mounting ears 105. Shock-absorbing pads 5 and metal bushings 6 are arranged on the mounting holes from the outside to the inside in sequence, and reinforcing ribs 106 are arranged between the mounting ears 105 and the valve body. The valve housing 1, the mounting ears 105 and the reinforcing ribs 106 are preferably made of PA66+GF30 material in one piece.
[0021] Specifically, the electromagnetic component 2 includes a hollow support frame 201, a coil 202 is wound around the outside of the support frame 201, an electromagnetic shell 203 is arranged on the outside of the coil 202, and a plastic shell 204 is injection molded on the inner and outer sides of the electromagnetic shell 203 through a plastic process. A sleeve 205 is arranged inside the support frame 201 for magnetic isolation, and a moving iron core 206 that can move up and down is arranged inside the sleeve 205. A buffer pad 207 is arranged on the top of the moving iron core 206, and the sleeve 205 is provided with an upwardly protruding limit portion corresponding to the buffer pad 207.
[0022] Specifically, the upper valve head assembly 3 can move up and down in the upper tube cavity. The upper valve head assembly 3 includes an upper valve head 301 and an upper spring 302. The top of the upper valve head 301 is connected to the moving iron core 206. A sealing rubber pad 303 is provided on the side of the upper valve head 301 facing the cone 101. The upper end of the upper spring 302 is sleeved on the electromagnetic assembly 2, and the lower end of the upper spring 302 is sleeved on the upper valve head 301.
[0023] Specifically, the lower valve head assembly 4 includes a lower valve head 401, a lower spring 402 and a valve seat 403. The top of the lower valve head 401 passes through the vent hole 104 and abuts against the upper valve head 301. The upper end of the lower spring 402 is sleeved on the lower valve head 401, and the lower end of the lower spring 402 is arranged on the valve seat 403.
[0024] like Figure 4 As shown, the cross section of the shock absorbing pad 5 is an I-shaped structure. To further improve the buffering performance, annular grooves 501 are provided on the front and rear sides of the shock absorbing pad 5. The cross section of the metal bushing 6 is a T-shaped structure with a threaded through hole provided at the center.
[0025] The advantages of the utility model are: the structure of the buffer pad 207 combined with the sleeve 205 can effectively reduce the noise generated by the moving iron core 206 hitting the magnetic core, and the buffer pad 207 can absorb the buffering force, so that the electromagnetic component 2 can work more stably; the fixing structure of the mounting ear 105 combined with the metal bushing 6 is simple and reliable, which can improve the assembly efficiency, and the shock-absorbing pad 5 can reduce the noise generated by friction or vibration between the isolation valve and the bracket; the valve housing 1 adopts plastic parts, which reduces the weight of components and reduces vehicle fuel consumption.
[0026] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.
Claims
1. A fuel tank isolation valve with noise reduction function, comprising a valve housing with a cavity therein, characterized in that: The valve housing comprises a truncated cone which divides the cavity into an upper tube cavity and a lower tube cavity, a fuel tank pipeline joint connected to the upper tube cavity and a carbon canister pipeline joint connected to the lower tube cavity, a vent hole is opened at the center of the truncated cone, an electromagnetic assembly is arranged corresponding to the top of the valve housing, the electromagnetic assembly comprises a hollow support frame, a coil is wound on the outside of the support frame, an electromagnetic shell is arranged on the outside of the coil, and a plastic shell is injection molded on both sides of the electromagnetic shell by a plastic process, a moving iron core is arranged inside the support frame, a buffer pad is arranged on the top of the moving iron core, an upper valve head assembly which can move up and down in the upper tube cavity is arranged at the bottom of the moving iron core, the upper valve head assembly comprises an upper valve head, a sealing rubber pad is arranged on the side of the upper valve head facing the truncated cone, a lower valve head assembly which can move up and down is arranged in the valve housing corresponding to the lower tube cavity, a plurality of mounting ears are arranged on the outside of the valve housing, mounting holes are opened on the mounting ears, and shock-absorbing pads and metal bushings are arranged on the mounting holes in sequence from outside to inside.
2. A fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: The electromagnetic assembly also includes a sleeve, and the moving iron core can move up and down in the sleeve. The sleeve is provided with a limiting portion protruding upward corresponding to the buffer pad.
3. A fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: The upper valve head assembly also includes an upper spring, the upper end of the upper spring is sleeved on the electromagnetic assembly, and the lower end of the upper spring is sleeved on the upper valve head.
4. A fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: The lower valve head assembly includes a lower valve head, a lower spring and a valve seat. The top of the lower valve head passes through the vent hole and abuts against the upper valve head. The upper end of the lower spring is sleeved on the lower valve head, and the lower end of the lower spring is arranged on the valve seat.
5. The fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: The angle between the plane where the fuel tank pipeline joint is located and the plane where the carbon canister pipeline joint is located is 180°.
6. A fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: The cross section of the shock-absorbing pad is an I-shaped structure with annular grooves on the front and rear sides, and the cross section of the metal bushing is a T-shaped structure with a threaded through hole at the center.
7. A fuel tank isolation valve with noise reduction function according to claim 1, characterized in that: A reinforcing rib is arranged between the mounting ear and the valve body.
8. A fuel tank isolation valve with noise reduction function according to claim 7, characterized in that: The valve housing, the mounting ears and the reinforcing ribs are integrally made of PA66+GF30 material.
9. A fuel tank isolation valve with noise reduction function according to any one of claims 1 to 8, characterized in that: The electromagnetic assembly controls the upper valve head assembly to move closer to or away from the table to block or open the vent hole. When blocking, the upper valve head assembly and the table form a first sealing surface. The lower valve head assembly moves closer to or away from the upper valve head assembly to block or open the vent hole. When blocking, a second sealing surface is formed between the lower valve head assembly and the upper valve head assembly.