CN201731968U - Pressure transmitter provided with rectangular stress grooves - Google Patents
Pressure transmitter provided with rectangular stress grooves Download PDFInfo
- Publication number
- CN201731968U CN201731968U CN2010202787343U CN201020278734U CN201731968U CN 201731968 U CN201731968 U CN 201731968U CN 2010202787343 U CN2010202787343 U CN 2010202787343U CN 201020278734 U CN201020278734 U CN 201020278734U CN 201731968 U CN201731968 U CN 201731968U
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- CN
- China
- Prior art keywords
- flexible member
- outer pipe
- metal outer
- rectangular
- rectangular stress
- 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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Abstract
The utility model relates to a pressure transmitter provided with rectangular stress grooves, which comprises an elastic element, a measuring circuit and a process connection part; the measuring circuit is arranged on a circuit board; the process connection part comprises a metal outer pipe, a Hirschmann connector and a four-core cable, wherein one side of the metal outer pipe is connected with the elastic element, the other side of the metal outer pipe is connected with one side of the Hirschmann connector, the other side of the Hirschmann connector is connected with the four-core cable, and the circuit board is arranged in the metal outer pipe; and the inside of the elastic element is connected with a damper, a layer of fluorubber sealing ring is stuck on the elastic element and takes a cylindrical shape, and at least three stress grooves with rectangular cross sections are formed in the circumferential direction of the elastic element. The pressure transmitter has the advantages of simple structure, low manufacturing cost, high measuring accuracy and good stability.
Description
Technical field
The utility model relates to a kind of pressure unit, especially relates 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.
The utility model content
The utility model purpose 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 purpose of this utility model is 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 utility model 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 utility model is simple in structure, low cost of manufacture, measuring accuracy height, good stability.
Description of drawings
Fig. 1 is the utility model one example structure synoptic diagram;
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 utility model 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 I 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 |
|---|---|---|---|
| CN2010202787343U CN201731968U (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter provided with rectangular stress grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202787343U CN201731968U (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter provided with rectangular stress grooves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201731968U true CN201731968U (en) | 2011-02-02 |
Family
ID=43523126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202787343U Expired - Lifetime CN201731968U (en) | 2010-08-02 | 2010-08-02 | Pressure transmitter provided with rectangular stress grooves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201731968U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871829A (en) * | 2010-08-02 | 2010-10-27 | 陈旭财 | Pressure transmitter with rectangular stress groove |
| CN105928641A (en) * | 2015-02-26 | 2016-09-07 | 森萨塔科技公司 | Microfused Silicon Strain Gauge (msg) Pressure Sensor Package |
-
2010
- 2010-08-02 CN CN2010202787343U patent/CN201731968U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871829A (en) * | 2010-08-02 | 2010-10-27 | 陈旭财 | Pressure transmitter with rectangular stress groove |
| CN105928641A (en) * | 2015-02-26 | 2016-09-07 | 森萨塔科技公司 | Microfused Silicon Strain Gauge (msg) Pressure Sensor Package |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110202 Effective date of abandoning: 20120829 |