CN215860542U - Air pressure needle valve and application structure thereof - Google Patents
Air pressure needle valve and application structure thereof Download PDFInfo
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- CN215860542U CN215860542U CN202121307517.7U CN202121307517U CN215860542U CN 215860542 U CN215860542 U CN 215860542U CN 202121307517 U CN202121307517 U CN 202121307517U CN 215860542 U CN215860542 U CN 215860542U
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Abstract
The utility model relates to an air pressure needle valve and an application structure thereof, and the air pressure needle valve comprises an air chamber shell, a valve needle, a diaphragm, a reset piece and an air chamber cover, wherein the air chamber shell and the air chamber cover are fixed to form an air chamber, a feeding channel is arranged on the air chamber shell, the front end of the valve needle penetrates through the air chamber shell, the feeding channel can be blocked or opened by the forward and backward movement of the valve needle, the rear end of the valve needle is connected with the diaphragm arranged in the air chamber, the diaphragm separates the air chamber into a first chamber and a second chamber which are not communicated with each other, the forward and backward swinging of the diaphragm can drive the valve needle to move forward and backward, the reset piece is arranged in the air chamber and is used for forcing the valve needle to be in a normally closed or normally opened state, and the air chamber is also provided with an air pressure access port for introducing air pressure to enable the diaphragm to swing. The air chamber shell of the air pressure needle valve is provided with a feeding channel which can be separated from a carburetor and independently applied to an external oil supply pipeline of the carburetor, and the external oil supply pipeline of the carburetor is directly blocked, so that oil leakage is avoided.
Description
Technical Field
The utility model relates to the technical field of carburetors, in particular to a pneumatic needle valve and an application structure thereof.
Background
The carburetor is a mechanical device which mixes gasoline and air in a certain proportion under the action of vacuum generated by the operation of an engine. Most of carburetors on the market at present are provided with electromagnetic valves, the electromagnetic valves are arranged on oil cups of the carburetors, and after an engine is flamed out, valve needles of the electromagnetic valves can completely close main metering orifices immediately to play a role in blocking the main metering orifices from supplying oil. Because the electromagnetic valve can work only by the power supply of the storage battery, the electromagnetic valve is particularly inconvenient to use under the condition of no storage battery or under the condition of long distance between the storage battery and the carburetor. Moreover, the cost of the solenoid valve is relatively high. Based on the above problems, there is a need to develop a normally closed needle valve structure that can bring more excellent effects than a solenoid valve without the need for the solenoid valve.
Therefore, the inventor applies for a novel patent of a normally closed negative pressure needle valve for a carburetor and a carburetor thereof in 2021, 6 and 5. In the technology, a normally closed negative pressure needle valve is an optimized scheme provided according to a conventional solenoid valve carburetor, and the normally closed negative pressure needle valve mainly blocks a main metering orifice of the carburetor. However, when the main orifice is blocked, the inside of the oil cup of the carburetor is still communicated with the oil tank, and the oil flowing into the oil cup is easy to overflow or leak out through the balance hole on the carburetor body. The inventor further optimizes the design and application of the normally closed negative pressure needle valve.
SUMMERY OF THE UTILITY MODEL
Based on the defects of the prior art, the utility model provides the air pressure needle valve and the application structure thereof, the air chamber shell of the air pressure needle valve is provided with the feeding channel which can be separated from the carburetor and is independently applied to the external oil supply pipeline of the carburetor, and the external oil supply pipeline of the carburetor is directly blocked, so that oil leakage is avoided.
In order to achieve the purpose, the technical scheme of the utility model is as follows: the utility model provides an atmospheric pressure needle valve, includes air chamber casing, needle, diaphragm, resets and the air chamber lid, the air chamber casing is fixed and forms the air chamber with the air chamber lid, its characterized in that: the air chamber shell is provided with a feeding channel, the feeding channel comprises a channel inlet and a channel outlet, the front end of the valve needle penetrates through the air chamber shell, the feeding channel can be plugged or opened by the back and forth movement of the valve needle, the rear end of the valve needle is connected with a diaphragm arranged in the air chamber, the diaphragm separates the air chamber into a first chamber and a second chamber which are not communicated with each other, the valve needle can be driven to move back and forth by the back and forth swing of the diaphragm, the reset piece is arranged in the air chamber and used for forcing the valve needle to be in a normally closed or normally open state for plugging or opening the feeding channel, and the air chamber is further provided with an air pressure access port for introducing air pressure to enable the diaphragm to swing.
Preferably, the air pressure is negative pressure or positive pressure, and the negative pressure or the positive pressure can be adopted according to actual needs and different types and installation positions of the resetting piece. Different air pressure needle valve forms can be configured according to the positive and negative pressure of the air pressure, the selection of the reset piece and different installation positions.
Preferably, the air chamber cover is provided with a negative pressure inlet for introducing negative pressure into the air chamber to swing the diaphragm.
Preferably, the piece that resets is the pressure spring, and the pressure spring is installed in the second cavity, the front end and the diaphragm of pressure spring are inconsistent or fixed mutually, the rear end and the second cavity inner wall of pressure spring are inconsistent or fixed mutually.
Preferably, the piece that resets is the extension spring to the extension spring is installed in first cavity, the front end of extension spring is fixed mutually with the inner wall of first cavity, the rear end of extension spring is fixed mutually with needle or diaphragm.
The application structure of the air pressure needle valve comprises the air pressure needle valve, a feeding channel of the air pressure needle valve is installed in an external oil supply pipeline of a carburetor, and an air pressure access port is communicated with a negative pressure chamber of the carburetor or an engine through an air pipe.
Preferably, the supply passage is mounted on an external supply line of the carburetor near one end of the carburetor, or the supply passage is mounted on an external supply line of the carburetor near one end of the fuel tank.
Preferably, the atmospheric pressure needle valve is normal close formula negative pressure needle valve, the piece that resets is the pressure spring, and the pressure spring is installed in the second cavity, the front end of pressure spring is inconsistent or fixed mutually with the diaphragm, the rear end of pressure spring is inconsistent or fixed mutually with the second cavity inner wall, the atmospheric pressure is inserted the mouth and is set up on the air chamber lid to introduce the negative pressure in the second cavity.
The utility model has the beneficial effects that: the air chamber shell is provided with the feeding channel, so that the air pressure needle valve is changed into an independent part which can be separated from the carburetor and independently applied to the oil supply pipeline between the carburetor and the oil tank, and the oil leakage is avoided by directly blocking the oil supply pipeline between the carburetor and the oil tank (namely the external oil supply pipeline of the carburetor).
Drawings
FIG. 1 is a schematic structural view of a pneumatic needle valve in an embodiment.
Description of reference numerals: 1-air chamber shell 1.1-first chamber 1.2-second chamber 2-valve needle 3-diaphragm 4-reset piece 5-air chamber cover 5.1-negative pressure inlet 6-feeding channel 6.1-channel inlet 6.2-channel outlet.
Detailed Description
In order to make the technical content and the constructional characteristics of the utility model more easily understood by a person skilled in the art, the present application is further described with reference to the accompanying drawings and technical features.
Referring to fig. 1, the pneumatic needle valve of the present invention includes an air chamber housing 1, a needle 2, a diaphragm 3, a reset member 4, and an air chamber cover 5, wherein the air chamber housing 1 and the air chamber cover 5 are fixed to form an air chamber.
The air chamber shell 1 is provided with a feeding channel 6, and the feeding channel 6 and the air chamber shell 1 can be integrally formed or can be formed in a split mode and then assembled together. In the present embodiment, the case that the supply channel 6 and the air chamber shell 1 can be integrally formed is described, and the supply channel 6 comprises a channel inlet 6.1 and a channel outlet 6.2.
The front end of the valve needle 2 penetrates through the air chamber shell 1, the feed channel 6 can be blocked by the back-and-forth movement of the valve needle 2, and the rear end of the valve needle 2 is connected with the membrane 3 arranged in the air chamber.
The diaphragm 3 separates the air chamber into a first chamber 1.1 and a second chamber 1.2 which are not communicated with each other, and the valve needle 2 can be driven to move back and forth by the forward and backward swing of the diaphragm 3.
Reset 4 and set up in the air chamber for force needle 2 to be in shutoff feed passage's normally closed state, reset 4 is the pressure spring, and the pressure spring is installed in second cavity 1.2, the front end of pressure spring is inconsistent or fixed mutually with diaphragm 3, the rear end of pressure spring is inconsistent or fixed mutually with second cavity 1.2 inner wall.
The air chamber cover 5 of the air chamber is also provided with a negative pressure access port 5.1 for introducing negative pressure to enable the diaphragm to swing, and the negative pressure access port 5.1 is communicated with a negative pressure chamber of a carburetor or an engine through an external air pipe.
When the air pressure needle valve is used, the air pressure needle valve, namely the normally closed negative pressure needle valve, is arranged on an oil supply pipeline between a carburetor and an oil tank, namely a feeding channel of the normally closed negative pressure needle valve is arranged on an external oil supply pipeline of the carburetor, can be arranged on the external oil supply pipeline close to one end of the carburetor, can also be arranged on the external oil supply pipeline of the carburetor close to one end of the oil tank, and a negative pressure access port of the normally closed negative pressure needle valve is communicated with the carburetor or a negative pressure cavity of an engine through an air pipe.
When starting, the utility model uses the negative pressure of the engine or the negative pressure at the air throttle of the carburetor body to drive the diaphragm in the air chamber of the normally closed negative pressure needle valve to swing, thereby driving the needle to move backwards and opening the feeding channel. When the engine stops, the negative pressure generated by the engine disappears, the diaphragm in the air chamber of the normally closed negative pressure needle valve automatically resets under the action of the resetting piece, and the normally closed state is recovered, so that the oil supply pipeline between the carburetor and the oil tank is blocked, and the oil leakage is avoided.
Compared with the prior invention of the inventor, the utility model has the advantages that the air pressure needle valve is changed into an independent piece by arranging the feeding channel on the air chamber shell, so that the air pressure needle valve can be separated from the carburetor and independently applied to the oil supply pipeline between the carburetor and the oil tank, and the oil supply pipeline between the carburetor and the oil tank (namely the external oil supply pipeline of the carburetor) is directly blocked, so that the oil leakage is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides an atmospheric pressure needle valve, includes air chamber casing, needle, diaphragm, resets and the air chamber lid, the air chamber casing is fixed and forms the air chamber with the air chamber lid, its characterized in that: the air chamber is characterized in that a feeding channel is arranged on the air chamber shell, the front end of the valve needle penetrates through the air chamber shell, the feeding channel can be blocked or opened by the aid of the forward and backward movement of the valve needle, the rear end of the valve needle is connected with a diaphragm arranged in the air chamber, the diaphragm separates the air chamber into a first chamber and a second chamber which are not communicated with each other, the valve needle can be driven to move forward and backward by the forward and backward swinging of the diaphragm, a resetting piece is arranged in the air chamber and used for forcing the valve needle to be in a normally closed or normally open state, and an air pressure access port is further formed in the air chamber and used for introducing air pressure to enable the diaphragm to swing.
2. The air pressure needle valve of claim 1, wherein: the air pressure is negative pressure or positive pressure.
3. A pneumatic needle valve according to claim 1 or 2, wherein: the air chamber cover is provided with a negative pressure access port for introducing negative pressure into the air chamber to enable the diaphragm to swing.
4. The air pressure needle valve of claim 1, wherein: the piece that resets is the pressure spring, and the pressure spring is installed in the second cavity, the front end of pressure spring is inconsistent or fixed mutually with the diaphragm, the rear end of pressure spring is inconsistent or fixed mutually with the indoor wall of second cavity.
5. The air pressure needle valve of claim 1, wherein: the piece that resets is the extension spring, and the extension spring is installed in first cavity, the front end of extension spring is fixed mutually with the inner wall of first cavity, the rear end of extension spring is fixed mutually with needle or diaphragm.
6. An application structure of a pneumatic needle valve, comprising the pneumatic needle valve as claimed in claim 1, wherein: the feed channel of the air pressure needle valve is arranged in an external oil supply pipeline of the carburetor, and the air pressure access port is communicated with the negative pressure chamber of the carburetor or the engine through an air pipe.
7. The structure of claim 6, wherein: the feeding channel is arranged on an external oil supply pipeline close to one end of the carburetor, or the feeding channel is arranged on an external oil supply pipeline close to one end of the oil tank.
8. The structure of claim 6, wherein: the atmospheric pressure needle valve is normal close formula negative pressure needle valve, the piece that resets is the pressure spring, and the pressure spring is installed in the second chamber, the front end of pressure spring is inconsistent or fixed mutually with the diaphragm, the rear end of pressure spring is inconsistent or fixed mutually with the second chamber inner wall, the atmospheric pressure is inserted the mouth and is set up on the air chamber lid to introduce the negative pressure in the second chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121307517.7U CN215860542U (en) | 2021-06-11 | 2021-06-11 | Air pressure needle valve and application structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121307517.7U CN215860542U (en) | 2021-06-11 | 2021-06-11 | Air pressure needle valve and application structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215860542U true CN215860542U (en) | 2022-02-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121307517.7U Active CN215860542U (en) | 2021-06-11 | 2021-06-11 | Air pressure needle valve and application structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215860542U (en) |
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2021
- 2021-06-11 CN CN202121307517.7U patent/CN215860542U/en active Active
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