CN101871829A - Pressure transmitter with rectangular stress groove - Google Patents
Pressure transmitter with rectangular stress groove Download PDFInfo
- Publication number
- CN101871829A CN101871829A CN 201010242583 CN201010242583A CN101871829A CN 101871829 A CN101871829 A CN 101871829A CN 201010242583 CN201010242583 CN 201010242583 CN 201010242583 A CN201010242583 A CN 201010242583A CN 101871829 A CN101871829 A CN 101871829A
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- CN
- China
- Prior art keywords
- flexible member
- metal outer
- stress groove
- rectangular
- outer 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 11
- 229920002449 FKM Polymers 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229920001973 fluoroelastomer Polymers 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention relates to a pressure transmitter with a rectangular stress groove, which comprises an elastic element, a measuring circuit and a process connector, the measuring circuit is arranged on a circuit board, the process connector consists of a metal outer tube, a Hirschmann connector and a four-core cable, one end of the metal outer tube is connected with the elastic element, the other end of the metal outer tube is connected with one end of the Hirschmann connector, the other end of the Hirschmann connector is connected with the four-core cable, the circuit board is arranged in the metal outer tube, the interior of the elastic element is connected with a damper, a layer of fluororubber seal ring is attached on the elastic element, the elastic element is a cylindrical elastic element, and the stress groove with at least three rectangular sections is arranged on the circumference of the elastic element. The invention has the advantages of simple structure, low fabrication cost, high measuring precision and high stability.
Description
Technical field
The present invention relates to a kind of pressure unit, especially relate to a kind of pressure unit with rectangular stress groove.
Background technology
Pressure unit is made up of flexible member, metering circuit and process web member three parts.Flexible member and detected element be by after being threaded, and the pretightning force that also needs to apply suitable size could be fastening with both, all can produce certain internal stress to flexible member when applying pretightning force at every turn, is called pretension stress; Simultaneously, again owing to be by being weldingly connected between flexible member and the process web member, welding stress and pretension stress will influence strain regions simultaneously, strain regions is owing to be subjected to stress influence, and do not overlap i.e. pressure unit generation zero point drift the zero point that records after the zero point that records and the unloading, cause pressure unit when test, the precision linear translation takes place, and with the linear deviation (being commonly referred to as accuracy error) that forms of algnment accuracy, precision reduces.Flexible member is when deforming, and corresponding distortion often can not be finished immediately, but finishes gradually in a period of time, and this phenomenon is called retarded elasticity.
The existence of pretension stress, welding stress, accuracy error and retarded elasticity will produce very adverse influence to the precision of whole measurement.At present, the silicon strain-gauge transducer is to use more a kind of pressure unit, but it also fails to solve effectively the error that pretension stress, welding stress, accuracy error and retarded elasticity cause measuring accuracy, and measuring accuracy is still lower, and stability is also poor.
Summary of the invention
The object of the invention is to overcome the above-mentioned defective that prior art exists, and provides a kind of simple in structure, low cost of manufacture, measuring accuracy height, the pressure unit of the band rectangular stress groove of good stability.
The objective of the invention is to be achieved through the following technical solutions: it comprises flexible member, metering circuit and process web member, described metering circuit is located on the wiring board, the process web member comprises metal outer pipe, Hirschmann connector and quad, metal outer pipe one side is connected with flexible member, opposite side is connected with Hirschmann connector one side, Hirschmann (Hirschmann) connector opposite side is connected with quad, wiring board is located in the metal outer pipe, flexible member inside links to each other with damper, post one deck viton seal ring on the flexible member, described flexible member is the tubular flexible member, and flexible member is circumferentially with the stress groove (hereinafter to be referred as rectangular stress groove) that at least three sections are rectangle.
Rectangular stress groove should be located at the part of being wrapped up by metal outer pipe on the flexible member or the junction of flexible member and metal outer pipe.Different rectangular stress grooves is in the circumferential stochastic distribution of tubular flexible member.
The rectangular stress well width is preferably 1 ~ 5mm, and the degree of depth is preferably 1 ~ 7mm.
The present invention adopts rectangular stress groove, and its effect shows as three aspects: the first, have welding stress between flexible member and the process web member, but under the effect of rectangular stress groove, the welding stress on the flexible member goes to zero; The second, by applying pretightning force with flexible member and detected element when fastening, the pretension stress on the flexible member is gradually reduced to zero in rectangular stress groove, help eliminating the error that pretension stress causes test; The 3rd, because the singularity of rectangular stress groove physical arrangement, make when applying pretightning force, the rectangular stress groove position has produced a stress the lowest point, thereby help strengthening the non-deformability and stability of flexible member, reduce the accuracy error of flexible member and reduce the error that the retarded elasticity phenomenon causes measuring accuracy, improve measuring accuracy.
Rectangular stress groove can reduce that the stress in when assembling is concentrated, accuracy error and retarded elasticity, and the reduction amplitude can reach 90%, and the reduction amplitude is relevant with width, the degree of depth and the quantity of rectangular stress groove, and in general, quantity is many more, and action effect is obvious more.
The present invention is simple in structure, low cost of manufacture, measuring accuracy height, good stability.
Description of drawings
Fig. 1 is one embodiment of the invention structural representation;
Fig. 2 is an elastic element structure synoptic diagram embodiment illustrated in fig. 1;
Fig. 3 is embodiment illustrated in fig. 1 and detected element assembly structure synoptic diagram.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.
With reference to Fig. 1, present embodiment comprises flexible member 1, metering circuit and process web member, described metering circuit is located on the wiring board 6, the process web member comprises metal outer pipe 3, Hirschmann connector 4 and quad 5, metal outer pipe 3 one sides are connected with flexible member 1, opposite side is connected with Hirschmann connector 4 one sides, Hirschmann connector 4 opposite sides are connected with quad 5, wiring board 6 is located in the metal outer pipe 3, flexible member 1 inside links to each other with damper 9, post one deck viton seal ring 2 on the flexible member 1, described flexible member 1 is the tubular flexible member, flexible member 1 is circumferentially with rectangular stress groove I 7-1, rectangular stress groove II 7-2, rectangular stress groove III 7-3, rectangular stress groove I 7-1, rectangular stress groove II 7-2 is located at the part of being wrapped up by metal outer pipe 3 on the flexible member 1, rectangular stress groove III 7-3 is located at the junction of flexible member 1 and metal outer pipe 3, i.e. the outside, the edge of metal outer pipe 1.
Described rectangular stress groove I 7-1 is wide to be 3.8mm, is 6.5mm deeply, and rectangular stress groove II 7-2 is wide to be 1mm, is 4.5mm deeply, and rectangular stress groove III 7-3 is wide to be 1mm, is 1.5mm deeply.
Before the test, both are fastening with flexible member 1 and detected element 10 by applying pretightning force, and the pretension stress on the flexible member 1 is gradually reduced to zero in each rectangular stress groove, make that strain regions does not have stress to disturb on the flexible member 1; When the silicon foil gauge being bonded on the strain regions of flexible member 1, because the stress low ebb that each rectangular stress groove place produces, can effectively eliminate the influence of the pressure that acts on the flexible member 1 to the flexible member strain regions; When flexible member 1 loaded, because the effect of each rectangular stress groove, the precision curve of the precision curve that records during loading when not loading overlapped substantially; When flexible member 1 distortion, rectangular stress groove has been strengthened the non-deformability and stability of flexible member, and it is consistent that the strain and stress of flexible member is changed, and do not have lag-effect, thereby eliminates the error that accuracy error and retarded elasticity cause measurement effectively.
The technical indicator of the pressure unit of the described band rectangular stress groove of present embodiment is as follows: range 5,10,18,40,60,100,160,200,300,500,1000,1500bar; Output signal 0mv/v ~ 10mv/v, 4-20mA; Supply voltage 5 ~ 15VDC; Precision (non-linear, hysteresis, repeatability) 0.1%span, 0.25%span, 0.5%span; Zero temperature drift 0.02%span/ ℃; Sensitivity temperature drift 0.02%span/ ℃; Working temperature-40 ~ 120 ℃; Temperature compensation-20 ~ 85 ℃.
Claims (3)
1. pressure unit with rectangular stress groove, comprise flexible member, metering circuit and process web member, described metering circuit is located on the wiring board, the process web member comprises metal outer pipe, Hirschmann connector and quad, metal outer pipe one side is connected with flexible member, opposite side is connected with Hirschmann connector one side, Hirschmann connector opposite side is connected with quad, wiring board is located in the metal outer pipe, flexible member inside links to each other with damper, posts one deck viton seal ring on the flexible member, it is characterized in that, described flexible member is the tubular flexible member, and flexible member is circumferentially with the stress groove that at least three sections are rectangle.
2. according to the pressure unit of claims 1 described band rectangular stress groove, it is characterized in that rectangular stress groove is located at the part of being wrapped up by metal outer pipe on the flexible member or the junction of flexible member and metal outer pipe.
3. according to the pressure unit of claims 1 or 2 described band rectangular stress grooves, it is characterized in that the rectangular stress well width is 1 ~ 5mm, the degree of depth is 1 ~ 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102425830A CN101871829B (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter with rectangular stress groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102425830A CN101871829B (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter with rectangular stress groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101871829A true CN101871829A (en) | 2010-10-27 |
| CN101871829B CN101871829B (en) | 2012-08-29 |
Family
ID=42996825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102425830A Expired - Fee Related CN101871829B (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter with rectangular stress groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101871829B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411722A (en) * | 2013-07-26 | 2013-11-27 | 上海俊乐制冷自控元件有限公司 | Improved pressure transmitter |
| CN111623850A (en) * | 2020-06-16 | 2020-09-04 | 南京沃天科技有限公司 | Liquid level transmitter waterproof sealing structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2148322Y (en) * | 1992-09-23 | 1993-12-01 | 王洪业 | Ion beam sputtered film pressure transducer |
| CN2190296Y (en) * | 1994-02-28 | 1995-02-22 | 四川空气动力技术开发设计测控部 | Precisive strain pressure sensor |
| CN2266737Y (en) * | 1996-08-28 | 1997-11-05 | 泰和电气(襄樊)有限公司 | Oilfield logging pressure sensor |
| CN2397484Y (en) * | 1999-10-28 | 2000-09-20 | 顾增华 | Plug-in type load cell |
| JP2001330529A (en) * | 2000-05-19 | 2001-11-30 | Yokogawa Electric Corp | Pressure sensor |
| WO2003064230A1 (en) * | 2002-01-31 | 2003-08-07 | Kelsey-Hayes Company | Pressure sensor integrated into an electro-hydraulic control unit |
| CN201731968U (en) * | 2010-08-02 | 2011-02-02 | 陈旭财 | Pressure transmitter provided with rectangular stress grooves |
-
2010
- 2010-08-02 CN CN2010102425830A patent/CN101871829B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2148322Y (en) * | 1992-09-23 | 1993-12-01 | 王洪业 | Ion beam sputtered film pressure transducer |
| CN2190296Y (en) * | 1994-02-28 | 1995-02-22 | 四川空气动力技术开发设计测控部 | Precisive strain pressure sensor |
| CN2266737Y (en) * | 1996-08-28 | 1997-11-05 | 泰和电气(襄樊)有限公司 | Oilfield logging pressure sensor |
| CN2397484Y (en) * | 1999-10-28 | 2000-09-20 | 顾增华 | Plug-in type load cell |
| JP2001330529A (en) * | 2000-05-19 | 2001-11-30 | Yokogawa Electric Corp | Pressure sensor |
| WO2003064230A1 (en) * | 2002-01-31 | 2003-08-07 | Kelsey-Hayes Company | Pressure sensor integrated into an electro-hydraulic control unit |
| CN201731968U (en) * | 2010-08-02 | 2011-02-02 | 陈旭财 | Pressure transmitter provided with rectangular stress grooves |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411722A (en) * | 2013-07-26 | 2013-11-27 | 上海俊乐制冷自控元件有限公司 | Improved pressure transmitter |
| CN103411722B (en) * | 2013-07-26 | 2015-10-07 | 上海俊乐制冷自控元件有限公司 | A kind of improved pressure transmitter |
| CN111623850A (en) * | 2020-06-16 | 2020-09-04 | 南京沃天科技有限公司 | Liquid level transmitter waterproof sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101871829B (en) | 2012-08-29 |
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