CN203490027U - Housing packaging pressure sensor for civilian gas meter - Google Patents

Housing packaging pressure sensor for civilian gas meter Download PDF

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Publication number
CN203490027U
CN203490027U CN201320652535.8U CN201320652535U CN203490027U CN 203490027 U CN203490027 U CN 203490027U CN 201320652535 U CN201320652535 U CN 201320652535U CN 203490027 U CN203490027 U CN 203490027U
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CN
China
Prior art keywords
housing
pressure sensor
shell
plate
base plate
Prior art date
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Active
Application number
CN201320652535.8U
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Chinese (zh)
Inventor
渠峻松
向德华
刘利方
邓虎
王本伍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hunan Weiming Energy Technology Co Ltd
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Hunan Weiming Energy Technology Co Ltd
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Publication date
Application filed by Hunan Weiming Energy Technology Co Ltd filed Critical Hunan Weiming Energy Technology Co Ltd
Priority to CN201320652535.8U priority Critical patent/CN203490027U/en
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Publication of CN203490027U publication Critical patent/CN203490027U/en
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Abstract

The utility model discloses a housing packaging pressure sensor for a civilian gas meter. The housing comprises an upper housing and a bottom plate in sealing connection with the lower end of the upper housing. The bottom plate is provided with a vacuum-pumping tube used for pumping out gas in an inner cavity of the upper housing. The bottom plate is further connected with a leading-out pin used for leading out a signal of the pressure sensor. The inner end of the leading-out pin is extended outside the inner surface of the bottom plate, and the tail end of the leading-out pin is provided with an installation plate used for fixing a chip of the pressure sensor. The chip of the pressure sensor is fixed inside the upper housing. A signal collected by the pressure sensor is output through the leading-out pin connected with the installation plate of the fixed chip. Silicon oil in the inner cavity of the upper housing is used for isolating the chip of the pressure sensor and the outer corrosion environment. The vacuum-pumping tube is used for pumping out the gas in the inner cavity, and then the silicon oil is poured into the inner cavity to ensure no bubble in the pouring process. The housing is corrosion resistant and ensures usage effects of the pressure sensor. Compared with the prior art, the housing is advantaged by saving manpower and material resource costs.

Description

For domestic gas table, encapsulate the housing of pressure transducer
Technical field
The utility model relates to a kind of domestic gas table, is specifically related to encapsulate in a kind of domestic gas table the housing of pressure transducer.
Background technology
To in intelligent gas meter, realize the function of temperature pressure compensation, just need to be at the inner setting pressure sensor of gas meter, flow meter.And in the combustion gas that gas meter, flow meter inside is passed through, may contain the elements such as sulphur, chlorine, be combined rear generation corrosivity with water, if adopt at a low price for the airborne pressure transducer of dry cleansing, thereby be likely in use corroded to damage, lost efficacy.For the general shell that adopts 316 stainless steel encapsulating structures of pressure transducer of industrial environment, ambient pressure is delivered on senser element sensitive element by 316 stainless steel diaphragms and inner filling silicone oil at present.Because isolation diaphragm need to be accomplished neither to affect, pressure transmits and withstand corrosion, therefore in the thickness of isolation diaphragm, material, profile, design needs very professional technology, therefore adopts the price of the corrosion resistant pressure transducer of waterproof of this isolation diaphragm design general all not with several times of the price of this shell even more than tens times.As in common smart mobile phone for the pressure transducer price general charged of measuring height below ten yuans, and the most cheap pressure transducer with the corrosion resistant shell of waterproof also tens to hundreds of unit.
Another scheme with the pressure transducer of the corrosion resistant shell of waterproof be adopt silica gel by pressure sensor package in stainless steel structure enclosure, ambient pressure is delivered on senser element sensitive element by silica gel.Because common silica gel does not have good anticorrosion effect, this technology is even higher than the designing requirement of isolation diaphragm for corrosion-resistant design and the pressure sensing designing requirement of silica gel, can take at present producer that this technology encapsulates corrosion-resistant sensor seldom, the sensor price of this scheme is also very expensive.
Utility model content
The purpose of this utility model is to provide the housing of a kind of low price, service-strong encapsulation pressure transducer.
The disclosed this housing that encapsulates pressure transducer for domestic gas table of the utility model, comprise upper shell and the base plate that is sealedly attached to upper shell lower end, on base plate, be useful on the vacuum-pumping tube of extracting air in upper shell inner chamber out, on base plate, be also connected with for drawing the leading foot of pressure sensor signal, the inside surface of base plate is stretched out in the inner of leading foot, and its end is welded with the installing plate for fixation pressure sensor chip.
Described upper shell is that the T shape of hollow is cylindric, and the upper end of its reduced diameter section is the blind end with Silicone oil injection hole, and the lower end of enlarged diameter section is openend.
Described base plate is the round plate identical with described upper shell lower port diameter, has the mounting hole of corresponding described vacuum-pumping tube and leading foot on it.
The utility model is fixed on pressure sensor chip in upper shell, and the leading foot that the installing plate by fixed chip connects is exported the signal of pressure transducer collection.Utilize silicone oil in upper shell inner chamber to reach the effect of isolation sensor chip and external corrosion environment.In the inner chamber of upper shell, inject before silicone oil, by vacuum-pumping tube, the air in inner chamber is extracted out, guarantee in silicone oil filling process without Bubble formation.Can anticorrosion, can guarantee again the result of use of pressure transducer.
Compare with prior art, have that production technology is simple, starting material are cheap, do not need to design special isolation diaphragm the advantage of the cost that uses manpower and material resources sparingly.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model.
Fig. 2 is that schematic diagram is looked on the right side of Fig. 1.
Fig. 3 is that schematic diagram is looked on a left side of Fig. 1.
Embodiment
As shown in Figure 1 to Figure 3, the disclosed this housing that encapsulates pressure transducer for domestic gas table of the utility model, comprise upper shell 1 and the base plate 2 that is sealedly attached to upper shell 1 lower end, on base plate 2, be useful on the vacuum-pumping tube 3 of extracting air in upper shell 1 inner chamber out, on base plate 2, be also connected with for drawing the leading foot 4 of pressure sensor signal, the inside surface of base plate 2 is stretched out in the inner of leading foot 4, and its end is welded with the installing plate 5 for fixation pressure sensor chip.The T shape that upper shell 1 is hollow is cylindric, and the upper end of its reduced diameter section is the blind end with Silicone oil injection hole 11, and the lower end of enlarged diameter section is openend.Base plate 2 is the round plate identical with upper shell 1 lower port diameter, has the mounting hole of corresponding vacuum-pumping tube 3 and leading foot 4 on it.
Between upper shell 1 and base plate 2, adopt laser seal welding, welding between vacuum-pumping tube 3 and leading foot 4 and base plate 2, pressure sensor chip is welded on installing plate 5, the inner of leading foot 4 and installing plate 5 welding.
Vacuum-pumping tube 3 injects silicone oil in Silicone oil injection hole 11 from its upper end after the inner chamber of upper shell 1 is vacuumized in the inner chamber of upper shell 1, guarantees not produce bubble in silicone oil.The diameter in Silicone oil injection hole 11 is suitable between 1mm-2mm, the injection rate IR of silicone oil is when guaranteeing housing horizontal positioned, silicone oil neither can flow out from Silicone oil injection hole 11, and the pressure loss being simultaneously delivered on housing pressure sensor chip by silicone oil is advisable with interior at 100Pa.After silicone oil perfusion, sealing vacuum-pumping tube 3.
Silicone oil injection hole 11 ends of attention upper shell 1 in installation process can not be down.

Claims (3)

1. a housing that encapsulates pressure transducer for domestic gas table, it is characterized in that: this housing comprises upper shell and is sealedly attached to the base plate of upper shell lower end, on base plate, be useful on the vacuum-pumping tube of extracting air in upper shell inner chamber out, on base plate, be also connected with for drawing the leading foot of pressure sensor signal, the inside surface of base plate is stretched out in the inner of leading foot, and its end is welded with the installing plate for fixation pressure sensor chip.
2. the housing that encapsulates pressure transducer for domestic gas table as claimed in claim 1, is characterized in that: the T shape that described upper shell is hollow is cylindric, and the upper end of its reduced diameter section is the blind end with Silicone oil injection hole, and the lower end of enlarged diameter section is openend.
3. the housing that encapsulates pressure transducer for domestic gas table as claimed in claim 2, is characterized in that: described base plate is the round plate identical with described upper shell lower port diameter, has the mounting hole of corresponding described vacuum-pumping tube and leading foot on it.
CN201320652535.8U 2013-10-23 2013-10-23 Housing packaging pressure sensor for civilian gas meter Active CN203490027U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320652535.8U CN203490027U (en) 2013-10-23 2013-10-23 Housing packaging pressure sensor for civilian gas meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320652535.8U CN203490027U (en) 2013-10-23 2013-10-23 Housing packaging pressure sensor for civilian gas meter

Publications (1)

Publication Number Publication Date
CN203490027U true CN203490027U (en) 2014-03-19

Family

ID=50260850

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320652535.8U Active CN203490027U (en) 2013-10-23 2013-10-23 Housing packaging pressure sensor for civilian gas meter

Country Status (1)

Country Link
CN (1) CN203490027U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655621A (en) * 2017-11-16 2018-02-02 佛山市川东磁电股份有限公司 A kind of pressure sensor waterproof case

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107655621A (en) * 2017-11-16 2018-02-02 佛山市川东磁电股份有限公司 A kind of pressure sensor waterproof case

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