CN202790712U - Check valve of plastic fuel tank - Google Patents
Check valve of plastic fuel tank Download PDFInfo
- Publication number
- CN202790712U CN202790712U CN201220425910.0U CN201220425910U CN202790712U CN 202790712 U CN202790712 U CN 202790712U CN 201220425910 U CN201220425910 U CN 201220425910U CN 202790712 U CN202790712 U CN 202790712U
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- CN
- China
- Prior art keywords
- fuel tank
- flange
- cover plate
- shape pipe
- shaped pipe
- 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 - Lifetime
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model relates to a check valve of a plastic fuel tank and belongs to the technical field of the plastic fuel tank. The check valve of the plastic fuel tank comprises an S-shaped pipe, a cover plate and a welding joint, wherein the cover plate is capable of sealing the outlet of the check valve; the welding joint is provided with a flange; the flange is welded on the outer wall of the fuel tank; the S-shaped pipe is located in the fuel tank; the axis of the upper pipe mouth and the axis of the lower pipe mouth of the S-shaped pipe are respectively horizontal; the cover plate is hinged on the upper wall of the lower pipe mouth of the S-shaped pipe; the upper pipe mouth of the S-shaped pipe is provided with a flanging; the flanging is embedded in a corresponding pit of the outer wall of the fuel tank; the flanging and the pit are in interference fit; the flange of the welding joint is pressed on the flanging of the upper pipe mouth of the S-shaped pipe; the lower pipe mouth of the S-shaped pipe and the cover plate are located below the closed liquid level of the fuel tank; and the upper pipe mouth of the S-shaped pipe is located above the closed liquid level of the fuel tank. When the fuel tank is refueled to jump the gun, gas in the fuel tank cannot be discharged from the check valve, and pressure in the fuel tank can be prevented from rapidly lowering, and therefore, the fuel tank is prevented from generating addition amount exceeding the standard.
Description
Technical field
The utility model relates to a kind of plastic fuel tank, particularly a kind of plastic fuel tank safety check.
Background technique
The connecting part of fuel tank oil filling pipe and fuel tank is provided with safety check, existing safety check comprises the welded joint that is provided with flange, described flange welding is on the outer wall of fuel tank, the outer mouth of pipe of welded joint welds mutually with the lower nozzle of oil filling pipe, the inner spout of welded joint is welded with the straight tube that stretches into the fuel tank inner chamber, and the inner spout upper wall of straight tube is hinged with cover plate.
When oil-fired system is refueled, fuel oil is pushed cover plate open by gravity and is entered in the fuel tank, oil level rises gradually, when liquid level rising and sealing fuel-filling exhaust joint, the liquid level of this moment is called closes liquid level, and oil level stops the exhaust of refueling unit tracheae after arriving and closing liquid level, tank internal pressure sharply rises and forms the jumping rifle, the major function of safety check is when refuel jumping rifle, and cover plate covers the outlet of safety check with deadweight or spring-force driven dual, prevents fuel oil because tank internal pressure and be sprayed onto the external world from oil filling pipe.
Because tank design limited space, safety check need to be arranged in closes on the liquid level, the problem that forms like this is, after oiling is jumped rifle automatically, cover plate is closed the gas of front fuel tank evaporating space and can be discharged from safety check, and tank pressure sharply descends, when manually again starting nozzle and add, can form very large additional amount, surpass the additional amount requirement of oil-fired system regulation.
The model utility content
The purpose of this utility model is, overcomes problems of the prior art, and a kind of plastic fuel tank safety check is provided, and after oiling is jumped rifle automatically, can avoid oil vapor to discharge from safety check.
For solving above technical problem, a kind of plastic fuel tank safety check provided by the utility model, comprise the cover plate that can seal the safety check outlet and the welded joint that is provided with flange, described flange welding is on the outer wall of fuel tank, also comprise S shape pipe, described S shape pipe is positioned at the axis of fuel tank and upper lower nozzle and distinguishes horizontal, described cover plate is hinged on the lower nozzle upper wall of described S shape pipe, the upper orifice of described S shape pipe is provided with flange, described flange is embedded in the corresponding pit of fuel tank outer wall, and the flange of described welded joint is pressed on the flange of described S shape pipe upper orifice; The lower nozzle of described S shape pipe and described cover plate are positioned at closing below the liquid level of fuel tank, and the upper orifice of described S shape pipe is positioned at closing more than the liquid level of fuel tank.
With respect to prior art, the utility model has been obtained following beneficial effect: close below the liquid level owing to the lower nozzle that is provided with S shape pipe and S shape pipe is positioned at, when refueling the jumping rifle, the gas of fuel tank internal can not discharged from safety check, can stop the pressure in the fuel tank sharply to descend, thereby stop fuel tank to produce the additional amount that surpasses standard.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, accompanying drawing only provides reference and explanation usefulness, and is non-in order to limit the utility model.
Fig. 1 is the structural representation of the utility model plastic fuel tank safety check.
Among the figure: 1. fuel tank; 2. close liquid level; 3.S shape pipe; 3a. flange; 4. cover plate; 5. welded joint; 5a. flange.
Embodiment
As shown in Figure 1, plastic fuel tank safety check of the present utility model comprises S shape pipe 3, can seal the cover plate 4 of safety check outlet and be provided with the welded joint 5 of flange, S shape pipe 3 is positioned at the axis of fuel tank and upper lower nozzle and distinguishes horizontal, cover plate 4 is hinged on the lower nozzle upper wall of S shape pipe 3, the upper orifice of S shape pipe 3 is provided with flange 3a, flange 3a is embedded in the corresponding pit of fuel tank outer wall and interference fit between the two, on the flange 3a that is pressed in S shape pipe upper orifice interior week of the flange 5a of welded joint, the periphery of flange 5a is welded on the outer wall of fuel tank 1; What the lower nozzle of S shape pipe 3 and cover plate 4 were positioned at fuel tank 1 closes liquid level below 2, and what the upper orifice of S shape pipe 3 was positioned at fuel tank closes liquid level more than 2.
During oiling, fuel oil is pushed cover plate 4 open by gravity and is entered in the fuel tank, oil level rises gradually, when liquid level rises and the sealing fuel-filling exhaust joint, close liquid level below 2 because the lower nozzle of S shape pipe is positioned at, when refueling the jumping rifle, the gas of fuel tank internal can not discharged from safety check, can stop the pressure in the fuel tank sharply to descend, thereby stop fuel tank to produce the additional amount that surpasses standard.
The above only is the better possible embodiments of the utility model, and is non-so limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (1)
1. plastic fuel tank safety check, comprise the cover plate that can seal the safety check outlet and the welded joint that is provided with flange, described flange welding is on the outer wall of fuel tank, it is characterized in that: also comprise S shape pipe, described S shape pipe is positioned at the axis of fuel tank and upper lower nozzle and distinguishes horizontal, described cover plate is hinged on the lower nozzle upper wall of described S shape pipe, the upper orifice of described S shape pipe is provided with flange, described flange is embedded in the corresponding pit of fuel tank outer wall, and the flange of described welded joint is pressed on the flange of described S shape pipe upper orifice; The lower nozzle of described S shape pipe and described cover plate are positioned at closing below the liquid level of fuel tank, and the upper orifice of described S shape pipe is positioned at closing more than the liquid level of fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425910.0U CN202790712U (en) | 2012-08-27 | 2012-08-27 | Check valve of plastic fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425910.0U CN202790712U (en) | 2012-08-27 | 2012-08-27 | Check valve of plastic fuel tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790712U true CN202790712U (en) | 2013-03-13 |
Family
ID=47817976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220425910.0U Expired - Lifetime CN202790712U (en) | 2012-08-27 | 2012-08-27 | Check valve of plastic fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790712U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106573534A (en) * | 2014-08-26 | 2017-04-19 | 株式会社利富高 | Fuel tank check valve |
| CN109611597A (en) * | 2019-01-08 | 2019-04-12 | 浙江银轮机械股份有限公司 | A kind of electronic valve |
-
2012
- 2012-08-27 CN CN201220425910.0U patent/CN202790712U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106573534A (en) * | 2014-08-26 | 2017-04-19 | 株式会社利富高 | Fuel tank check valve |
| CN106573534B (en) * | 2014-08-26 | 2019-02-12 | 株式会社利富高 | Fuel tank check-valves |
| US10253894B2 (en) | 2014-08-26 | 2019-04-09 | Nifco Inc. | Fuel tank check valve |
| CN109611597A (en) * | 2019-01-08 | 2019-04-12 | 浙江银轮机械股份有限公司 | A kind of electronic valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: YAPP AUTOMOTIVE PARTS (KAIFENG) Co.,Ltd. Assignor: Yapp Automotive Parts Co.,Ltd. Contract record no.: 2015410000034 Denomination of utility model: Check valve of plastic fuel tank Granted publication date: 20130313 License type: Exclusive License Record date: 20150430 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |