Oil-gas isolating valve
By introducing a combination of snap structure and spring into the oil and gas isolation valve, the problem of inability to refuel during power outage is solved, and a long-term opening state during loading is achieved, and the product will automatically return to normal use after power on. Sealing.
Patent Information
- Application Number
- CN202420236048.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-31
AI Technical Summary
The existing oil and gas isolation valve cannot remain open when the power is off, resulting in the problem of not being able to refuel during loading.
An oil and gas isolation valve including a solenoid valve screw, a spring, a first piston, a second piston and a sealing plate is designed. The first piston is kept in an open state when it is not powered on through a snap structure, and the spring force is used to make it with electromagnetic force. The valve screw is stuck in contact, and the force is greater than the spring force, ensuring long-term opening.
It realizes keeping the valve open in a power-off state, ensuring oil and gas circulation during loading, and automatically returning to normal closed state after the product is powered on, ensuring the sealing of subsequent use.
Smart Images
Figure CN222334594U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an isolation valve, in particular to an oil and gas isolation valve. Background Art
[0002] One end of the oil and gas isolation valve is connected to the vehicle's fuel tank and the other end is connected to the carbon canister. The direction of oil and gas flow is from the fuel tank to the carbon canister. The FTIV (high-pressure fuel tank and fuel tank isolation valve) is used in the fuel tank of a hybrid vehicle. There is a normal pressure of 30kPa at the fuel tank end. When the FTIV is in the natural state (non-powered), the spring presses the piston against the vent of the valve body to ensure the product's sealing.
[0003] When the FTIV is working, the car energizes the solenoid valve, causing the piston of the solenoid valve to move upward, opening the channel and realizing the exhaust function of the fuel tank.
[0004] However, because the spring continuously applies downward pressure to the piston in the FTIV product, the oil-gas isolation valve is normally closed when the solenoid valve is de-energized. However, during vehicle assembly, the production line needs to fill the vehicle's fuel tank with a certain amount of gasoline. During this time, the oil-gas isolation valve must be kept open. During vehicle assembly, the vehicle lacks the power to open the valve. Therefore, the valve must be kept open during assembly. After the vehicle is powered on (for the first time), the valve returns to its default operating mode, normally closed. Summary of the Invention
[0005] The utility model aims to overcome the defects of the prior art and provides an oil and gas isolation valve to solve the problem that oil cannot be added when the valve is closed in a power-off state.
[0006] In order to solve the above technical problems, the utility model is achieved as follows:
[0007] An oil-gas isolation valve comprises a solenoid valve screw, a spring, a first piston, a second piston and a sealing plate; the solenoid valve screw is axially fixed to the first piston, a spring is installed between the first piston and the second piston, and a sealing plate is provided at the bottom of the second piston; when power is not supplied, the spring applies downward pressure to the first piston, and the first piston is pressed downward to form a sealing structure with the sealing plate; the valve is characterized in that it also includes a connecting portion, through which the solenoid valve screw and the first piston are connected so that the first piston is in an open state when power is not supplied.
[0008] The oil-gas isolation valve is characterized in that: the connecting part is a snap-fit structure, which includes protrusions on both sides of the inner wall of the first piston and grooves corresponding to the protrusions on both sides of the solenoid valve screw; the first piston is pressed down by the elastic force of the spring until its groove and the protrusion are snap-fitted and stop, and the snap-fitting force is greater than the elastic force of the spring. At this time, the first piston is in an open state.
[0009] The oil-gas isolation valve is characterized in that the protrusions are arranged at the bottom ends of the inner walls on both sides of the first piston.
[0010] The beneficial effect of the present invention is: it can be seen from the above technical solution that the present application provides an oil and gas isolation valve, which can maintain an open state for a long time. After the product is powered on, the pulling force generated by the solenoid valve causes the snap structure to disengage. Due to the existence of the spring force, it can be ensured that the snap structure will no longer contact the solenoid valve screw, thereby ensuring subsequent normal use. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
[0012] Figure 1 This is a structural diagram of the buckle structure of this application when it is disengaged. DETAILED DESCRIPTION
[0013] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection requested by this application.
[0014] like Figure 1 Figure 2 shows an oil-gas isolation valve, which includes a solenoid valve screw 1, a spring 2, a first piston 3, a second piston 4 and a sealing plate 5; the solenoid valve screw is axially fixed to the first piston, a spring is installed between the first piston and the second piston, and a sealing plate is provided at the bottom of the second piston; when power is not supplied, the spring applies downward pressure to the first piston, and the first piston presses down to form a sealing structure with the sealing plate; the valve also includes a connecting portion, through which the solenoid valve screw and the first piston are connected, so that the first piston is in an open state when power is not supplied.
[0015] The connecting part is a snap-fit structure, which includes protrusions 6 on both sides of the inner wall of the first piston and grooves 7 on both sides of the solenoid valve screw corresponding to the protrusions; the first piston is pressed down by the elastic force of the spring until its groove and the protrusion are snap-fitted and stop, and the snap-fitting force is greater than the elastic force of the spring. At this time, the first piston is in an open state.
[0016] The protrusions are arranged at the bottom ends of the inner walls on both sides of the first piston.
[0017] During the product assembly process, the solenoid valve screw is clamped to the inner wall of the first piston by controlling the stroke of the solenoid valve screw. The clamping force needs to be greater than the elastic force of the spring and less than the pulling force after the solenoid valve is energized.
[0018] In this state, the newly manufactured product can remain in the open state for a long time. After the product is powered on, the pulling force generated by the solenoid valve causes the buckle to disengage. Due to the existence of spring force, it can be ensured that the buckle structure will no longer contact the solenoid valve screw, ensuring subsequent normal use.
[0019] The above are only embodiments provided for this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.
Claims
1. An oil-gas isolation valve, comprising a solenoid valve screw, a spring, a first piston, a second piston and a sealing sheet; the solenoid valve screw is axially fixed to the first piston, a spring is installed between the first piston and the second piston, and a sealing sheet is provided at the bottom of the second piston; when no power is supplied, the spring applies downward pressure to the first piston, and the first piston is pressed downward to form a sealing structure with the sealing sheet; the characteristics are: It also includes a connecting part, through which the solenoid valve screw rod and the first piston are connected to realize that when no power is supplied, the first piston is in an open state.
2. The oil-gas isolation valve according to claim 1, characterized in that: The connecting part is a snap-fit structure, which includes protrusions on both sides of the inner wall of the first piston and grooves on both sides of the solenoid valve screw corresponding to the protrusions; the first piston is pressed down by the elastic force of the spring until its groove and the protrusion are snap-fitted and stop, and the snap-fitting force is greater than the elastic force of the spring. At this time, the first piston is in an open state.
3. The oil-gas isolation valve according to claim 2, characterized in that: The protrusions are arranged at the bottom ends of the inner walls on both sides of the first piston.