CN202708222U - Check valve of fuel tank - Google Patents
Check valve of fuel tank Download PDFInfo
- Publication number
- CN202708222U CN202708222U CN 201220421441 CN201220421441U CN202708222U CN 202708222 U CN202708222 U CN 202708222U CN 201220421441 CN201220421441 CN 201220421441 CN 201220421441 U CN201220421441 U CN 201220421441U CN 202708222 U CN202708222 U CN 202708222U
- Authority
- CN
- China
- Prior art keywords
- valve
- fuel tank
- spool
- check valve
- suction port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a valve body, in particular to a check valve of a fuel tank. The check valve of the fuel tank comprises a hollow cylindrical valve body with a bottom cover; the inside of the valve body is provided with a hollow valve passage; the upper section of the valve passage is provided with a cylindrical air inlet; the lower end of the air inlet expands outwards to form a seal opening of a middle section; the lower end of the seal opening is connected with a cylindrical airflow channel; the airflow channel is the lower section of the valve passage; a spring sleeve in a vertical direction is also arranged; the lower end of the spring sleeve is arranged on the bottom cover, and the upper end of the spring sleeve is arranged in the airflow channel; a compression spring is arranged in the spring sleeve; the upper end of the compression spring is compressed by the lower end of a valve rod; the upper end of the valve rod is connected with a spherical valve core; the upper part of the valve core is arranged in the seal opening; and an air inlet hole is arranged on the bottom cover. When negative pressure in the fuel tank reaches a certain valve, the check valve is opened, the air enters the fuel tank to eliminate the negative pressure in the fuel tank; when the fuel tank is inclined or fuel in the fuel tank fluctuates, the fuel does not penetrate out through the check valve; and the structure is simple, and the safety is good.
Description
Technical field
The utility model relates to a kind of valve body, specifically, relate to a kind of fuel tank check valve, be installed on the fuel tank cap during use, when the negative pressure in the fuel tank reached certain value, safety check was opened, and air enters fuel tank and eliminates negative pressure in the fuel tank, when the fuel oil fluctuation in fuel tank inclination or the fuel tank, can not permeate away by safety check.
Background technique
Fuel tank refers to be used on automobile or the motorcycle chest of deposit gasoline, and in the process of continuous fuel feeding, fuel tank internal can produce certain negative pressure, therefore, need to have a suction port to come the inside and outside pressure of trim tank.Simultaneously, the existence of suction port should not make fuel tank when run-off the straight or fuel oil fluctuation, leaks out by suction port, therefore, needs a kind of fuel tank check valve of design.
The model utility content
The purpose of this utility model is to adapt to the reality needs, and a kind of fuel tank check valve is provided.
In order to realize the purpose of this utility model, the technical solution adopted in the utility model is:
A kind of fuel tank check valve, comprise the hollow cylindrical valve body with bottom, described valve inner is the valve road of hollow, described valve road epimere is cylindrical suction port, the lower end of described suction port expands outwardly the sealed mouth that forms the stage casing, described sealed mouth lower end connecting cylinder shape air-flow path, described air-flow path is the hypomere in valve road, also comprises the spring spool of vertical direction, and described spring spool lower end is positioned on the bottom, the upper end is positioned at air-flow path, be provided with Compress Spring in the described spring spool, the upper end of described Compress Spring is by the compression of the lower end of valve rod, and the upper end of valve rod connects spherical spool, spool top is positioned at sealed mouth, and described bottom is provided with inlet hole.
Also be provided with seal ring, a described seal ring part is arranged in the draw-in groove of suction port bottom, and the sidewall that a part is stretched out suction port props up spool.
Also be provided with the shell fragment that is positioned at the bottom below, described shell fragment one end is fixed in the bottom lower surface, and the other end covers inlet hole.
The beneficial effects of the utility model are:
When the negative pressure in the fuel tank reached certain value, safety check was opened, and air enters fuel tank and eliminates negative pressure in the fuel tank, when the fuel oil fluctuation in fuel tank inclination or the fuel tank, can not permeate away by safety check, and simple in structure, the Security of use is good.
Description of drawings
Fig. 1 is the utility model embodiment one sectional structure schematic representation;
Fig. 2 is the utility model embodiment two sectional structure schematic representation.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified:
Embodiment one: referring to Fig. 1.
A kind of fuel tank check valve, comprise the hollow cylindrical valve body 1 with bottom 3, described valve body 1 inside is the valve road 2 of hollow, described valve road epimere is cylindrical suction port 21, the lower end of described suction port 21 expands outwardly the sealed mouth 22 that forms the stage casing, described sealed mouth 22 lower end connecting cylinder shape air-flow paths 23, described air-flow path 23 is the hypomere in valve road 2, the spring spool 4 that also comprises vertical direction, described spring spool 4 lower ends are positioned on the bottom 3, the upper end is positioned at air-flow path 23, be provided with Compress Spring 5 in the described spring spool 4, the upper end of described Compress Spring 5 is by the compression of the lower end of valve rod 6, and the upper end of valve rod 6 connects spherical spool 7, spool 7 tops are positioned at sealed mouth 22, and described bottom 3 is provided with inlet hole 10.
The outer surface of valve body 1 is provided with screw thread, be used for being connected with screw on the fuel tank cap, after the connection, suction port 21 is communicated with atmosphere, bottom 3 is positioned at the inside of fuel tank, and when the fuel tank internal negative pressure produced certain value, atmosphere backed down spool 7, flow through successively behind suction port 21, sealed mouth 22, the air-flow path 23, be provided with the gas that inlet hole 10 replenishes in the fuel tank by bottom 3.After the fuel tank external and internal pressure was in a basic balance, spool 7 propped up sealed mouth 22 under the effect of Compress Spring 5, and fuel oil then can not flow through spool 7 and overflow.
As preferred embodiment a kind of, also be provided with seal ring 8, described seal ring 8 parts are arranged in the draw-in groove of suction port 21 bottoms, and the sidewall that a part is stretched out suction port 21 props up spool 7.Seal ring 8 contacts with spherical spool 7, can be good at realizing sealing.
Embodiment two: referring to Fig. 2.
Present embodiment and embodiment one are basic identical, and its something in common is not given unnecessary details, and difference only is, the fuel tank check valve of present embodiment, also be provided with the shell fragment 9 that is positioned at bottom 3 belows, described shell fragment 9 one ends are fixed in bottom 3 lower surfaces, and the other end covers inlet hole 10.
Air-flow can be washed shell fragment open from inlet hole 10 and enter fuel tank internal, and fuel oil then can not flow out inlet hole 10 by shell fragment 9 from fuel tank internal, and shell fragment 9 cooperates with spool 7, realizes dual fail-safe, can be good at preventing fuel leakage.
What embodiment of the present utility model announced is preferred embodiment; but be not limited to this; those of ordinary skill in the art; very easily according to above-described embodiment; understand spirit of the present utility model; and make different amplifications and variation, but only otherwise break away from spirit of the present utility model, all in protection domain of the present utility model.
Claims (3)
1. fuel tank check valve, comprise the hollow cylindrical valve body with bottom, described valve inner is the valve road of hollow, it is characterized in that: described valve road epimere is cylindrical suction port, the lower end of described suction port expands outwardly the sealed mouth that forms the stage casing, described sealed mouth lower end connecting cylinder shape air-flow path, described air-flow path is the hypomere in valve road, the spring spool that also comprises vertical direction, described spring spool lower end is positioned on the bottom, the upper end is positioned at air-flow path, be provided with Compress Spring in the described spring spool, the upper end of described Compress Spring is by the compression of the lower end of valve rod, and the upper end of valve rod connects spherical spool, spool top is positioned at sealed mouth, and described bottom is provided with inlet hole.
2. fuel tank check valve according to claim 1, it is characterized in that: also be provided with seal ring, a described seal ring part is arranged in the draw-in groove of suction port bottom, and the sidewall that a part is stretched out suction port props up spool.
3. fuel tank check valve according to claim 2 is characterized in that: also be provided with the shell fragment that is positioned at the bottom below, described shell fragment one end is fixed in the bottom lower surface, and the other end covers inlet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421441 CN202708222U (en) | 2012-08-24 | 2012-08-24 | Check valve of fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421441 CN202708222U (en) | 2012-08-24 | 2012-08-24 | Check valve of fuel tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202708222U true CN202708222U (en) | 2013-01-30 |
Family
ID=47588528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220421441 Expired - Fee Related CN202708222U (en) | 2012-08-24 | 2012-08-24 | Check valve of fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202708222U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762258A (en) * | 2019-10-31 | 2020-02-07 | 南通龙源电站阀门有限公司 | Ultrahigh-temperature high-pressure large-caliber check valve |
| CN113969886A (en) * | 2020-07-22 | 2022-01-25 | 陕西卓远能源科技有限公司 | Tubular oil well pump |
-
2012
- 2012-08-24 CN CN 201220421441 patent/CN202708222U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110762258A (en) * | 2019-10-31 | 2020-02-07 | 南通龙源电站阀门有限公司 | Ultrahigh-temperature high-pressure large-caliber check valve |
| CN113969886A (en) * | 2020-07-22 | 2022-01-25 | 陕西卓远能源科技有限公司 | Tubular oil well pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20130824 |