CN105784251B - A kind of corrosion resistance differential pressure core and its manufacturing method - Google Patents
A kind of corrosion resistance differential pressure core and its manufacturing method Download PDFInfo
- Publication number
- CN105784251B CN105784251B CN201610267791.3A CN201610267791A CN105784251B CN 105784251 B CN105784251 B CN 105784251B CN 201610267791 A CN201610267791 A CN 201610267791A CN 105784251 B CN105784251 B CN 105784251B
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- Prior art keywords
- titanium alloy
- lead
- differential pressure
- bracket
- lead pin
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/06—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of piezo-resistive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
- G01L19/0627—Protection against aggressive medium in general
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a kind of corrosion resistance differential pressure cores, including lead pin, glass bushing, lantern ring and titanium alloy down-lead bracket, lead pin is sheathed in glass bushing, glass bushing is sheathed in lantern ring and mutually sintering forms lead pin component, mounting hole is offered on titanium alloy down-lead bracket, for lead pin components welding in mounting hole, the both ends of titanium alloy down-lead bracket are welded with Titanium Alloy End Cover Part.The invention also discloses a kind of manufacturing methods of differential pressure core as described above, including S01, beginning, lead pin are sheathed in glass bushing, then glass bushing is sintered in stainless steel lantern ring, form lead pin component；S02, lead pin component is welded in the mounting hole of titanium alloy down-lead bracket by golden soldering process；S03, encapsulation form differential pressure core.Differential pressure core of the invention has many advantages, such as that structure is simple, corrosion resistance is strong.Core manufacturing method of the invention has many advantages, such as stable structure that is easy to operate, being formed.
Description
Technical field
The invention mainly relates to pressure measurement technology field, a kind of corrosion resistance differential pressure core and its manufacturing method are refered in particular to.
Background technique
Existing silicon piezoresistance type differential pressure core, structure use stainless steel material substantially, and core generally uses sealing ring to seal.When
The core is applied to the field of pressure measurement of strong acid corrosive gas, liquid, i.e. measuring medium is the strong gas or liquid of corrosivity
Body, in long-term measurement, existing differential pressure core is had the disadvantage that
1) it is sealed due to core using sealing ring, and sealing ring restricted lifetime, is easy leakage under long-term corrosion environment；
2) material that differential pressure core uses is stainless steel, intolerant to long-term corrosion；And stainless steel material density is larger, weight
It is larger.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
The strong differential pressure core of kind simple and stable structure, corrosion resistance；And accordingly provide a kind of easy to operate, simple process corrosion resistance
Differential pressure core manufacturing method.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of corrosion resistance differential pressure core, including lead pin, glass bushing, lantern ring and titanium alloy down-lead bracket, institute
It states lead pin to be sheathed in the glass bushing, the glass bushing is sheathed in lantern ring and mutually sintering forms lead pin
Component offers mounting hole on the titanium alloy down-lead bracket, and in mounting hole, the titanium closes the lead pin components welding
The both ends of gold wire bracket are welded with Titanium Alloy End Cover Part.
As a further improvement of the above technical scheme:
The lantern ring is stainless steel lantern ring.
It is provided in the Titanium Alloy End Cover Part of wherein one end of the titanium alloy down-lead bracket for being welded with survey pressure pedestal
The ring-shaped step connect.
The invention also discloses a kind of manufacturing methods of corrosion resistance differential pressure core as described above, comprising the following steps:
S01, beginning, lead pin is sheathed in glass bushing, then glass bushing is sintered in stainless steel lantern ring, shape
At lead pin component；
S02, in the surface gold-plating of titanium alloy down-lead bracket, lead pin component is welded in titanium by golden soldering process and is closed
In the mounting hole of gold wire bracket；
S03, titanium alloy down-lead bracket is packaged to form differential pressure core.
As a further improvement of the above technical scheme:
Detailed process is as follows by step S03:
S31, in titanium alloy down-lead bracket enclosed inside chip varistor, and in titanium alloy down-lead bracket both ends sealing welding titanium
Alloy end cap；
S32, by the aperture on titanium alloy down-lead bracket to silicone oil is perfused inside titanium alloy down-lead bracket, after the completion of perfusion
Aperture is sealed to form differential pressure core.
In step s 32, by filling in pin in aperture, and use the welding of pressure drag Welding to seal.
Compared with the prior art, the advantages of the present invention are as follows:
Corrosion resistance differential pressure core of the invention will use full titanium material with the component of media contact on core, improve
The corrosion resistance of core and the weight for alleviating core.The manufacturing method of poor corrosion resistance pressure welded type of the invention, is being adopted
On the basis of titanium alloy member, the technique for having adjusted each component processing has ensured the stability of differential pressure core and resistance to
Corrosivity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of lead pin component in the present invention.
Fig. 2 is the structural schematic diagram of lead pin component and titanium alloy down-lead bracket in the present invention.
Fig. 3 is the structural schematic diagram of differential pressure core of the invention.
Figure label indicates: 1, lead pin；2, glass bushing；3, lantern ring；4, titanium alloy down-lead bracket；5, titanium alloy end
Lid；51, ring-shaped step；6, aperture.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
As shown in Figure 1 to Figure 3, the corrosion resistance differential pressure core of the present embodiment, including lead pin 1, glass bushing 2, set
Ring 3 and titanium alloy down-lead bracket 4, lead pin 1 are sheathed in glass bushing 2, and glass bushing 2 is sheathed in lantern ring 3 and phase
Mutually sintering forms lead pin component, mounting hole is offered on titanium alloy down-lead bracket 4, lead pin components welding is in mounting hole
Interior, the both ends of titanium alloy down-lead bracket 4 are welded with Titanium Alloy End Cover Part 5.Corrosion resistance differential pressure core of the invention, will be on core
Full titanium material is used with the component of media contact, the corrosion resistance of core is improved and alleviates the weight of core.
In the present embodiment, lantern ring 3 is stainless steel lantern ring, can be effectively sintered between stainless steel lantern ring and glass bushing 2.
The annular table for being welded with survey pressure pedestal is provided in the Titanium Alloy End Cover Part 5 of wherein one end of titanium alloy down-lead bracket 4
Rank 51, relative to sealing element sealing means are used before, can guarantee core and measurement pedestal (titanium due to using annular solder
Alloy material) between will not reveal because long-time is corroded, i.e. guarantee is reliably connected and leakproofness is to prolong the service life.
As shown in Figure 1 to Figure 3, the invention also discloses a kind of manufacturers of corrosion resistance differential pressure core as described above
Method, comprising the following steps:
S01, as shown in Figure 1, lead pin 1 is sheathed in glass bushing 2, then glass bushing 2 is sintered in lantern ring 3
It is interior, form lead pin component；Lantern ring 3 uses stainless steel material herein, not only due to lantern ring 3 is not (used with media contact
It is consider corrosion resistance problems more), and the stable stainless steel lantern ring and glass bushing 2 of service performance can guarantee sintering process
Reliability improves the stability of lead pin modular construction；
S02, as shown in Fig. 2, titanium alloy down-lead bracket 4 surface gold-plating, lead pin component is passed through into golden soldering work
Skill is welded in the mounting hole of titanium alloy down-lead bracket 4；Since the lantern ring 3 in step S01 uses stainless steel material,
It is more mature using technology in order to guarantee the reliability of welding when stainless steel lantern ring and titanium alloy down-lead bracket 4 are welded
Golden soldering and welding technique, guarantee being reliably connected for lead pin component and titanium alloy down-lead bracket 4；
S03, as shown in figure 3, being packaged to form differential pressure core to titanium alloy down-lead bracket 4.
In the present embodiment, detailed process is as follows by step S03:
S31, chip varistor is encapsulated in 4 upper end of titanium alloy down-lead bracket, the cavity one inside titanium alloy down-lead bracket 4 is divided
It is two, and in 4 both ends sealing welding Titanium Alloy End Cover Part 5 of titanium alloy down-lead bracket, the end face of two of them Titanium Alloy End Cover Part 5
Titanium alloy corrugated plate including sealing welding；As shown in figure 3, wherein the Titanium Alloy End Cover Part 5 of upper end is to measure the positive pressure side of pressure,
The Titanium Alloy End Cover Part 5 of lower end is then the negative pressure end of measurement pressure；
S32, by the aperture 6 on titanium alloy down-lead bracket 4 to being separated inside titanium alloy down-lead bracket 4 by chip varistor
Two empty intra-bladder instillation silicone oil, after the completion of perfusion, fill in pin in aperture 6, and use pressure drag Welding to weld with by aperture 6
Sealing forms differential pressure core.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (5)
1. a kind of corrosion resistance differential pressure core, which is characterized in that including lead pin (1), glass bushing (2), lantern ring (3) and
Titanium alloy down-lead bracket (4), the lead pin (1) are sheathed in the glass bushing (2), and the glass bushing (2) is arranged
In lantern ring (3) and mutually sintering forms lead pin component, offers mounting hole on the titanium alloy down-lead bracket (4), institute
The surface gold-plating of titanium alloy down-lead bracket (4) is stated, the lead pin component is welded in mounting hole by golden soldering process, institute
The both ends for stating titanium alloy down-lead bracket (4) are welded with Titanium Alloy End Cover Part (5)；The lantern ring (3) is stainless steel lantern ring.
2. corrosion resistance differential pressure core according to claim 1, which is characterized in that the titanium alloy down-lead bracket (4)
The ring-shaped step (51) for being welded with survey pressure pedestal is wherein provided in the Titanium Alloy End Cover Part (5) of one end.
3. a kind of manufacturing method of corrosion resistance differential pressure core as claimed in claim 1 or 2, which is characterized in that including following
Step:
Lead pin (1) is sheathed in glass bushing (2), then glass bushing (2) is sintered in stainless steel lantern ring by S01, beginning
It is interior, form lead pin component；
Lead pin component is welded in titanium by golden soldering process and closed by S02, the surface gold-plating in titanium alloy down-lead bracket (4)
In the mounting hole of gold wire bracket (4)；
S03, titanium alloy down-lead bracket (4) is packaged to form differential pressure core.
4. the production method of corrosion resistance differential pressure core according to claim 3, which is characterized in that step S03's is specific
Process is as follows:
S31, in titanium alloy down-lead bracket (4) enclosed inside chip varistor, and in titanium alloy down-lead bracket (4) both ends sealing welding
Titanium Alloy End Cover Part (5)；
S32, silicone oil, perfusion are perfused to titanium alloy down-lead bracket (4) is internal by the aperture (6) on titanium alloy down-lead bracket (4)
Aperture (6) sealing is formed into differential pressure core after the completion.
5. the production method of corrosion resistance differential pressure core according to claim 4, which is characterized in that in step s 32, lead to
It crosses and fills in pin in aperture (6), and use the welding of pressure drag Welding to seal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610267791.3A CN105784251B (en) | 2016-04-27 | 2016-04-27 | A kind of corrosion resistance differential pressure core and its manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610267791.3A CN105784251B (en) | 2016-04-27 | 2016-04-27 | A kind of corrosion resistance differential pressure core and its manufacturing method |
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| CN105784251A CN105784251A (en) | 2016-07-20 |
| CN105784251B true CN105784251B (en) | 2019-06-11 |
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| CN201610267791.3A Active CN105784251B (en) | 2016-04-27 | 2016-04-27 | A kind of corrosion resistance differential pressure core and its manufacturing method |
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| CN108151953A (en) * | 2017-12-21 | 2018-06-12 | 中国电子科技集团公司第四十八研究所 | A kind of sealing adaptor housing, differential pressure core and sealing adaptor method for producing shell |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184514A (en) * | 1991-07-12 | 1993-02-09 | Rosemount Inc. | Corrosion resistant isolator |
| CN201600218U (en) * | 2009-12-18 | 2010-10-06 | 安徽科达自动化集团股份有限公司 | Post-type pressure difference transmitter |
| CN102569102A (en) * | 2011-12-10 | 2012-07-11 | 中国振华集团永光电子有限公司 | Hermetic package method and structure of transistor base and transistor pin |
| CN103175649A (en) * | 2011-12-22 | 2013-06-26 | 罗斯蒙德公司 | Pressure sensor module for sub-sea applications |
| CN203083751U (en) * | 2012-12-26 | 2013-07-24 | 南京沃天科技有限公司 | Titanium alloy core body |
| CN105181187A (en) * | 2015-09-09 | 2015-12-23 | 沈阳仪表科学研究院有限公司 | Silicon-based pressure sensor and manufacturing method thereof |
-
2016
- 2016-04-27 CN CN201610267791.3A patent/CN105784251B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184514A (en) * | 1991-07-12 | 1993-02-09 | Rosemount Inc. | Corrosion resistant isolator |
| CN201600218U (en) * | 2009-12-18 | 2010-10-06 | 安徽科达自动化集团股份有限公司 | Post-type pressure difference transmitter |
| CN102569102A (en) * | 2011-12-10 | 2012-07-11 | 中国振华集团永光电子有限公司 | Hermetic package method and structure of transistor base and transistor pin |
| CN103175649A (en) * | 2011-12-22 | 2013-06-26 | 罗斯蒙德公司 | Pressure sensor module for sub-sea applications |
| CN203083751U (en) * | 2012-12-26 | 2013-07-24 | 南京沃天科技有限公司 | Titanium alloy core body |
| CN105181187A (en) * | 2015-09-09 | 2015-12-23 | 沈阳仪表科学研究院有限公司 | Silicon-based pressure sensor and manufacturing method thereof |
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| CN105784251A (en) | 2016-07-20 |
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