CN201903436U - Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank - Google Patents

Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank Download PDF

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Publication number
CN201903436U
CN201903436U CN2010206489625U CN201020648962U CN201903436U CN 201903436 U CN201903436 U CN 201903436U CN 2010206489625 U CN2010206489625 U CN 2010206489625U CN 201020648962 U CN201020648962 U CN 201020648962U CN 201903436 U CN201903436 U CN 201903436U
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CN
China
Prior art keywords
fuel tank
pressure
steel cylinder
plastic fuel
constant
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
Application number
CN2010206489625U
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Chinese (zh)
Inventor
孙岩
姜林
刘亮
管云祥
胡江流
Original Assignee
Yapp Automotive Parts Co Ltd
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Publication date
Application filed by Yapp Automotive Parts Co Ltd filed Critical Yapp Automotive Parts Co Ltd
Priority to CN2010206489625U priority Critical patent/CN201903436U/en
Application granted granted Critical
Publication of CN201903436U publication Critical patent/CN201903436U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a pressure-constant device used for nitrogen gas tightness test for plastic fuel tank, and belongs to the technical field of tightness testing equipment for the fuel tank. The pressure-constant device comprises a nitrogen gas steel cylinder, a steel cylinder air valve is arranged on the nitrogen gas steel cylinder, an outlet of the steel cylinder air valve is connected with a steel cylinder outlet pipe, a pressure reducing valve is mounted on the steel cylinder outlet pipe, and an outlet of the pressure reducing valve is communicated with an inlet pipe of the plastic fuel tank. The pressure-constant device is characterized in that a proportional pressure reducing valve is connected between the inlet pipe of the plastic fuel tank and the pressure reducing valve in series, and a pressure sensor is mounted on the inlet pipe of the plastic fuel tank. During measuring, the proportional pressure reducing valve can be automatically closed when pressure inside the plastic fuel tank measured by the pressure sensor reaches a set value of the proportional pressure reducing valve, and the pressure inside the plastic fuel tank can be kept at the set value after the steel cylinder air valve is closed manually. The pressure sensor can measure decrease of the pressure when the plastic fuel tank is in leakage, and accordingly, tightness of the plastic fuel tank can be judged.

Description

The constant-voltage equipment that is used for nitrogen check plastic fuel tank sealing
Technical field
The utility model relates to a kind of constant-voltage equipment that is used for nitrogen check plastic fuel tank sealing, belongs to fuel tank Leakage Test experimental facilities technical field.
Background technology
Before dispatching from the factory, plastic fuel tank needs to measure through Leakage Test, existing automobile plastic fuel tank sealing experimental facilities comprises the nitrogen steel cylinder, the nitrogen steel cylinder is provided with Steel cylinder gas valve, the outlet of Steel cylinder gas valve is connected with the steel cylinder outlet, on the steel cylinder outlet reduction valve is installed, the outlet of reduction valve is connected with the plastic fuel tank induction pipe.When measuring, plastic fuel tank inside will keep the pressure of 0.3kPa, and traditional way is that at U-shaped pipe of the outside connection of plastic fuel tank, an end of U-shaped pipe communicates with plastic fuel tank inside, injects a certain amount of water in the U-shaped pipe.Open Steel cylinder gas valve and reduction valve and feed nitrogen in plastic fuel tank, the difference in height of the U-shaped of visual inspection simultaneously pipe water column, the aperture by the control Steel cylinder gas valve make plastic fuel tank inner sustain pressure stable.In measuring process, because macroscopic error, and the aperture of Steel cylinder gas valve must not get and control accurately, is difficult to make the pressure in the plastic fuel tank to keep stable.
The utility model content
The purpose of this utility model is, overcomes problems of the prior art, and a kind of constant-voltage equipment that is used for nitrogen check plastic fuel tank sealing is provided, and can keep the nitrogen pressure in the plastic fuel tank constant in the checking measurements process.
For solving above technical matters, a kind of constant-voltage equipment that is used for nitrogen check plastic fuel tank sealing provided by the utility model, comprise the nitrogen steel cylinder, described nitrogen steel cylinder is provided with Steel cylinder gas valve, the outlet of described Steel cylinder gas valve is connected with the steel cylinder outlet, on the described steel cylinder outlet reduction valve is installed, the outlet of described reduction valve is communicated with the plastic fuel tank induction pipe, be serially connected with proportional pressure-reducing valve between described plastic fuel tank induction pipe and the described reduction valve, on the described plastic fuel tank induction pipe pressure transducer be installed.
With respect to prior art, the utility model has been obtained following beneficial effect: during measurement, open the Steel cylinder gas valve of nitrogen steel cylinder, nitrogen is discharged from the nitrogen steel cylinder, the adjusting reduction valve reduces the pressure in the tracheae, the force value that proportional pressure-reducing valve stops to inflate is set, proportional pressure-reducing valve is compared the mensuration force value of pressure transducer in real time, when pressure transducer measures tank internal pressure when reaching setting value, proportional pressure-reducing valve can be closed automatically, manually close Steel cylinder gas valve again, the pressure of plastic fuel tank can remain on setting value.Leak if fuel tank exists, pressure transducer can be measured reducing of pressure, judges the sealing property of plastic fuel tank with this.
Description of drawings
Fig. 1 is used for the synoptic diagram of the constant-voltage equipment of nitrogen check plastic fuel tank sealing for the utility model.
Among the figure: 1 nitrogen steel cylinder, 2 Steel cylinder gas valves, 3 steel cylinder outlets, 4 reduction valve, 5 proportional pressure-reducing valves, 6 pressure transducers, 7 fuel tank induction pipes, 8 plastic fuel tanks.
Embodiment
As shown in Figure 1, the utility model is used for the constant-voltage equipment of nitrogen check plastic fuel tank sealing, comprise nitrogen steel cylinder 1, nitrogen steel cylinder 1 is provided with Steel cylinder gas valve 2, the outlet of Steel cylinder gas valve 2 is connected with steel cylinder outlet 3, successively be installed in series on the steel cylinder outlet 3 reduction valve 4, proportional pressure-reducing valve 5, the outlet of proportional pressure-reducing valve 5 is connected with plastic fuel tank induction pipe 7, and pressure transducer 6 is installed on the plastic fuel tank induction pipe 7.
During measurement, open the Steel cylinder gas valve 2 of nitrogen steel cylinder 1, nitrogen is discharged from nitrogen steel cylinder 1, adjusting reduction valve 4 reduces the pressure in the tracheae, and the force value that proportional pressure-reducing valve 5 stops to inflate is set, and proportional pressure-reducing valve 5 is the mensuration force value of comparison pressure transducers 6 in real time, when pressure transducer 6 measures tank internal pressure when reaching setting value, proportional pressure-reducing valve 5 can be closed automatically, manually closes Steel cylinder gas valve 2 again, and the nitrogen pressure in the plastic fuel tank 8 can remain on setting value.Leak if fuel tank exists, pressure transducer 6 can be measured reducing of pressure, judges the sealing property of plastic fuel tank 8 with this.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims (1)

1. one kind is used for the constant-voltage equipment that nitrogen is checked the plastic fuel tank sealing, comprise the nitrogen steel cylinder, described nitrogen steel cylinder is provided with Steel cylinder gas valve, the outlet of described Steel cylinder gas valve is connected with the steel cylinder outlet, on the described steel cylinder outlet reduction valve is installed, the outlet of described reduction valve is communicated with the plastic fuel tank induction pipe, it is characterized in that, be serially connected with proportional pressure-reducing valve between described plastic fuel tank induction pipe and the described reduction valve, on the described plastic fuel tank induction pipe pressure transducer be installed.
CN2010206489625U 2010-12-09 2010-12-09 Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank Expired - Lifetime CN201903436U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010206489625U CN201903436U (en) 2010-12-09 2010-12-09 Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010206489625U CN201903436U (en) 2010-12-09 2010-12-09 Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank

Publications (1)

Publication Number Publication Date
CN201903436U true CN201903436U (en) 2011-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010206489625U Expired - Lifetime CN201903436U (en) 2010-12-09 2010-12-09 Pressure-constant device used for nitrogen gas tightness test for plastic fuel tank

Country Status (1)

Country Link
CN (1) CN201903436U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136415A (en) * 2015-09-02 2015-12-09 华晨汽车集团控股有限公司 Structure and method for detecting air impermeability of battery bag case
CN111397811A (en) * 2020-05-27 2020-07-10 杭州忒白电子科技有限公司 Transformer oil tank sealing detection device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105136415A (en) * 2015-09-02 2015-12-09 华晨汽车集团控股有限公司 Structure and method for detecting air impermeability of battery bag case
CN111397811A (en) * 2020-05-27 2020-07-10 杭州忒白电子科技有限公司 Transformer oil tank sealing detection device
CN111397811B (en) * 2020-05-27 2021-01-26 新疆众鑫矿业有限责任公司 Transformer oil tank sealing detection device

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 225009 Yangzhou Jiangnan Road, No. 508, Jiangsu, China

Patentee after: Yapp Automotive Parts Co.,Ltd.

Address before: 225009 Yangzhou Jiangnan Road, No. 508, Jiangsu, China

Patentee before: YAPP Automotive Parts Co., Ltd.

C56 Change in the name or address of the patentee
CX01 Expiry of patent term

Granted publication date: 20110720

CX01 Expiry of patent term