Compact carbon tank electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to a compact carbon tank electromagnetic valve which comprises an upper shell, a lower shell installed at the bottom of the upper shell, a movable iron core assembly arranged in the middle of the interior of the upper shell, a spring arranged on the inner side of the movable iron core assembly, and a self-lubricating sleeve arranged on the outer side of the movable iron core assembly. The top end of the self-lubricating sleeve is provided with an upper guide plate, the outer side of the self-lubricating sleeve is provided with a coil assembly, the inner side of the spring is provided with a positioning column, the outer side of the bottom of the positioning column is provided with a static iron core, and the outer side of the bottom end of the static iron core is provided with a lower guide plate. According to the compact carbon tank electromagnetic valve, the internal structure of the electromagnetic valve is optimized, wear-resistant materials are adopted, and smooth treatment is carried out, so that airflow noise generated when the electromagnetic valve works is effectively reduced, and the driving comfort is improved. The electromagnetic valve is more compact in design and does not need extra noise reduction components, so that the cost of parts is reduced, and the economical efficiency of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a compact carbon canister solenoid valve. Background Art

[0002] With the development of the automobile industry and increasingly stringent environmental regulations, especially with the implementation of the National VI emission standards, the requirements for automobile fuel evaporation control systems are becoming increasingly higher. As a key component to reduce automobile fuel evaporation emissions and protect the environment, the performance and efficiency of the fuel evaporation system are directly related to the environmental performance and fuel economy of the vehicle. Among them, the carbon canister solenoid valve is an important part of the fuel evaporation system, and its working stability and efficiency have an important impact on the overall system performance.

[0003] However, under the National VI emission standard, the airflow of the fuel evaporation system has increased significantly, which puts higher requirements on the performance of the carbon canister solenoid valve. After the traditional carbon canister solenoid valve is opened, due to the large airflow, it often produces a lot of noise, which not only affects the driving comfort, but may also have an adverse effect on other parts of the vehicle. In order to reduce noise, the market usually adopts the method of adding a separate buffer cavity, but this method not only increases the cost of parts, but is also limited by the installation space, making the overall design complicated and not compact enough.

[0004] In addition, during the continuous opening and closing of the valve port, the high-speed flow of the airflow and the rapid movement of the valve can easily cause gas flow impulses, drive the pipeline to vibrate, and then transmit noise to the cockpit, affecting the driving experience. In order to solve this problem, the existing technology often uses an independent suspension cavity to reduce noise, but this method also has problems such as high cost and limited installation layout. Utility Model Content

[0005] The purpose of the utility model is to provide a compact carbon canister solenoid valve to solve the problem that the traditional carbon canister solenoid valve proposed in the above background technology often generates large noise after being opened due to the large air flow rate, which not only affects the driving comfort but also may have an adverse effect on other components of the vehicle.

[0006] To achieve the above-mentioned purpose, the utility model provides a compact carbon canister solenoid valve, including an upper shell, a lower shell is installed at the bottom of the upper shell, a moving iron core assembly is arranged in the middle of the interior of the upper shell, a spring is arranged on the inner side of the moving iron core assembly, a self-lubricating sleeve is arranged on the outer side of the moving iron core assembly, an upper guide plate is arranged on the top of the self-lubricating sleeve, a coil assembly is arranged on the outer side of the self-lubricating sleeve, a positioning column is arranged on the inner side of the spring, a static iron core is arranged on the outer side of the bottom of the positioning column, and a lower guide plate is installed on the outer side of the bottom end of the static iron core.

[0007] Preferably, a lower shell cover is installed at the bottom of the lower shell.

[0008] Preferably, a frame is installed on the inner side of the coil assembly.

[0009] Preferably, a magnetic conductive shell is installed on the outer side of the moving iron core assembly.

[0010] Preferably, the upper shell and the lower shell are fixed by a threaded connection or a snap connection, so as to ensure that the structure of the solenoid valve is stable and easy to disassemble and maintain.

[0011] Preferably, a sealing gasket is provided between the lower guide plate and the lower shell to prevent gas leakage during operation of the solenoid valve and ensure the sealing performance of the solenoid valve.

[0012] Preferably, the outside of the coil assembly is wrapped with an insulating layer to prevent the solenoid valve from generating safety hazards such as short circuit or electric shock when working.

[0013] Preferably, the upper guide plate and the lower guide plate are made of wear-resistant material to improve the service life and stability of the solenoid valve. The surfaces of the upper guide plate and the lower guide plate are smoothed to reduce the friction of the moving iron core assembly when moving and improve the response speed of the solenoid valve.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In this compact carbon canister solenoid valve, by optimizing the internal structure of the solenoid valve, such as the design of the moving iron core assembly, self-lubricating sleeve, upper guide plate and lower guide plate, as well as using wear-resistant materials and smooth treatment, the airflow noise of the solenoid valve during operation is effectively reduced, thereby improving driving comfort.

[0016] Compared with the traditional method of adding a separate buffer cavity for noise reduction, the solenoid valve of the utility model is more compact in design and does not require additional noise reduction components, thereby reducing the cost of components and improving the economy of the overall system. Since the solenoid valve of the utility model has a compact structure and does not take up too much space, it is more flexible in installation layout and adapts to the needs of different vehicle models and space restrictions. The service life and stability of the solenoid valve are improved: by using wear-resistant materials and smooth processing, and optimizing the internal structure of the solenoid valve, the friction of the moving iron core assembly when moving is effectively reduced, and the response speed and service life of the solenoid valve are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the coil assembly in the utility model;

[0020] The meaning of each number in the figure is:

[0021] 1. Upper shell; 2. Moving iron core assembly; 21. Spring; 22. Self-lubricating sleeve; 23. Upper guide plate; 24. Magnetic conductive shell; 25. Static iron core; 26. Positioning column; 27. Lower guide plate; 3. Coil assembly; 31. Frame; 4. Lower shell. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a compact carbon canister solenoid valve, such as Figure 1-Figure 3 As shown, it includes an upper housing 1, a lower housing 4 is installed at the bottom of the upper housing 1, a moving iron core assembly 2 is arranged in the middle of the upper housing 1, a spring 21 is arranged on the inner side of the moving iron core assembly 2, a self-lubricating sleeve 22 is arranged on the outer side of the moving iron core assembly 2, an upper guide plate 23 is arranged on the top of the self-lubricating sleeve 22, a coil assembly 3 is arranged on the outer side of the self-lubricating sleeve 22, a positioning column 26 is arranged on the inner side of the spring 21, a static iron core 25 is arranged on the outer side of the bottom of the positioning column 26, and a lower guide plate 27 is installed on the outer side of the bottom end of the static iron core 25. The solenoid valve is composed of the upper housing 1, the lower housing 4, and the internal moving iron core assembly 2, the spring 21, the self-lubricating sleeve 22, the coil assembly 3 and other components. The overall design is compact, which effectively reduces the volume of the solenoid valve and is convenient for installation and use under different space restrictions. The self-lubricating sleeve 22 on the outer side of the moving iron core assembly 2 reduces the friction of the moving iron core when it moves, making the operation of the solenoid valve more stable, and improving the response speed and service life. By optimizing the internal structure and component layout, such as the design of the moving iron core assembly 2, the upper guide plate 23 and the lower guide plate 27, and using wear-resistant materials and smooth treatment, the airflow noise of the solenoid valve during operation is effectively reduced, and the comfort of use is improved. The coil assembly 3 surrounds the outer side of the moving iron core assembly 2 and works together with the static iron core 25 to form an efficient electromagnetic drive system, ensuring the rapid and accurate switching of the solenoid valve. A sealing gasket is provided between the lower guide plate 27 and the lower shell 4, which effectively prevents gas leakage during operation of the solenoid valve, ensuring the sealing performance of the solenoid valve and the normal operation of the system.

[0024] In this embodiment, a lower shell cover is installed at the bottom of the lower shell 4 to facilitate the disassembly and installation of the bottom of the lower shell 4.

[0025] Specifically, a frame 31 is installed on the inner side of the coil assembly 3 to ensure the support and positioning of the coil assembly 3 .

[0026] Furthermore, a magnetic shell 24 is installed on the outer side of the moving iron core assembly 2, which can effectively guide and concentrate the magnetic field generated by the coil assembly 3, so that it can act on the moving iron core assembly 2 more efficiently. This enhances the electromagnetic driving force of the solenoid valve and improves the sensitivity and accuracy of the switch action.

[0027] Furthermore, the upper shell 1 and the lower shell 4 are fixed by a threaded connection or a snap connection, so as to ensure that the structure of the solenoid valve is stable and easy to disassemble and maintain.

[0028] Furthermore, a sealing gasket is provided between the lower guide plate 27 and the lower shell 4 to prevent gas leakage during operation of the solenoid valve and ensure the sealing performance of the solenoid valve.

[0029] Furthermore, the outside of the coil assembly 3 is wrapped with an insulating layer to prevent the electromagnetic valve from generating safety hazards such as short circuit or electric shock when working.

[0030] Furthermore, the upper guide plate 23 and the lower guide plate 27 are made of wear-resistant materials to improve the service life and stability of the solenoid valve. The surfaces of the upper guide plate 23 and the lower guide plate 27 are smoothed to reduce the friction of the moving iron core assembly 2 when moving and improve the response speed of the solenoid valve.

[0031] When the compact carbon canister solenoid valve of the utility model is used, first, when the solenoid valve needs to be opened, the coil assembly 3 is powered on to generate a magnetic field. This magnetic field acts on the moving iron core assembly 2, causing it to overcome the elastic force of the spring 21 and move upward. A magnetic conductive housing 24 is installed on the outside of the moving iron core assembly 2, which can effectively guide and concentrate the magnetic field generated by the coil assembly 3, so that the magnetic field acts on the moving iron core assembly 2 more efficiently, thereby enhancing the electromagnetic driving force of the solenoid valve and improving the sensitivity and accuracy of the switch action.

[0032] During the upward movement of the moving iron core assembly 2, the self-lubricating sleeve 22 reduces the friction of the moving iron core during movement, making the operation of the solenoid valve more stable. At the same time, the upper guide plate 23 and the lower guide plate 27 are both made of wear-resistant materials and are smoothed, further reducing the friction of the moving iron core assembly 2 during movement, thereby improving the response speed and service life of the solenoid valve.

[0033] When the moving iron core assembly 2 moves to a certain position, the gap between it and the static iron core 25 is reduced, and the magnetic field effect is stronger, so that the electromagnetic valve is fully opened. At this time, the air flow can pass through the electromagnetic valve to achieve the normal operation of the fuel evaporation system.

[0034] When the solenoid valve needs to be closed, the coil assembly 3 is powered off and the magnetic field disappears. The moving iron core assembly 2 moves downward under the elastic force of the spring 21 and returns to the initial position. A sealing gasket is provided between the lower guide plate 27 and the lower housing 4, which effectively prevents gas leakage during operation of the solenoid valve and ensures the sealing performance of the solenoid valve and the normal operation of the system.

[0035] During the entire working process, the coil assembly 3 is wrapped with an insulating layer to prevent the electromagnetic valve from generating short circuits or electric shocks and other safety hazards during operation. At the same time, the upper shell 1 and the lower shell 4 are fixed by threaded connection or snap connection to ensure that the structure of the electromagnetic valve is stable and easy to disassemble and maintain.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A compact carbon canister solenoid valve, comprising an upper housing (1), characterized in that: A lower shell (4) is installed at the bottom of the upper shell (1), a moving iron core assembly (2) is arranged in the middle of the upper shell (1), a spring (21) is arranged on the inner side of the moving iron core assembly (2), a self-lubricating sleeve (22) is arranged on the outer side of the moving iron core assembly (2), an upper guide plate (23) is arranged on the top of the self-lubricating sleeve (22), a coil assembly (3) is arranged on the outer side of the self-lubricating sleeve (22), a positioning column (26) is arranged on the inner side of the spring (21), a static iron core (25) is arranged on the outer side of the bottom of the positioning column (26), and a lower guide plate (27) is installed on the outer side of the bottom end of the static iron core (25).

2. The compact canister solenoid valve according to claim 1, characterized in that: A lower shell cover plate is installed at the bottom of the lower shell (4).

3. The compact canister solenoid valve according to claim 1, characterized in that: A frame (31) is installed on the inner side of the coil assembly (3).

4. The compact canister solenoid valve according to claim 1, characterized in that: A magnetic conductive housing (24) is installed on the outer side of the moving iron core assembly (2).

5. The compact canister solenoid valve according to claim 1, characterized in that: The upper shell (1) and the lower shell (4) are fixed via a threaded connection or a snap-fit ​​connection, thereby ensuring that the structure of the solenoid valve is stable and easy to disassemble and maintain.

6. The compact canister solenoid valve according to claim 1, characterized in that: A sealing gasket is provided between the lower guide plate (27) and the lower housing (4) to prevent gas leakage during operation of the solenoid valve and ensure the sealing performance of the solenoid valve.

7. The compact canister solenoid valve according to claim 1, characterized in that: The coil assembly (3) is wrapped with an insulating layer on the outside to prevent the electromagnetic valve from generating safety hazards such as short circuit or electric shock when working.

8. The compact canister solenoid valve according to claim 1, characterized in that: The upper guide plate (23) and the lower guide plate (27) are both made of wear-resistant material to improve the service life and stability of the solenoid valve. The surfaces of the upper guide plate (23) and the lower guide plate (27) are both smoothed to reduce the friction of the moving iron core assembly (2) when it moves, thereby improving the response speed of the solenoid valve.

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