CN201289417Y - High-temperature pressure transmitter - Google Patents
High-temperature pressure transmitter Download PDFInfo
- Publication number
- CN201289417Y CN201289417Y CNU2008201519203U CN200820151920U CN201289417Y CN 201289417 Y CN201289417 Y CN 201289417Y CN U2008201519203 U CNU2008201519203 U CN U2008201519203U CN 200820151920 U CN200820151920 U CN 200820151920U CN 201289417 Y CN201289417 Y CN 201289417Y
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- CN
- China
- Prior art keywords
- high temperature
- pressure
- elastic body
- kapillary
- pressure transmitter
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- 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 discloses a high-temperature pressure transmitter for measuring and monitoring fluid in high temperature process, which comprises a pressure sensing diaphragm positioned in the fluid in the high temperature process, a capillary pipe positioned at the upper end of the pressure sensing diaphragm and connected with the pressure sensing diaphragm, an elastomer positioned at the upper end of the capillary pipe and a strain gauge positioned at the upper end of the elastomer and connected with the elastomer. An amplifying circuit chip of a multiple operational amplifier which can directly amplify the obtained signals and is compatible with a remote monitoring system is connected at the upper end of the stain gauge. The utility model can directly output standard amplified signals and carries out remote process control with a computer or a PLC system; and the utility model has the advantages of good high temperature resistance, good stability, small lag error, good repetitiveness, low power consumption and small volume.
Description
Affiliated technical field
The utility model relates to a kind of plant equipment or the high temperature process stream pressure survey of other equipment and transmitters of control such as chemical fibre, rubber and plastic of being used for.
Background technology
Process monitoring and control system are used to monitor and control the operation of industrial process, be used to make chemical fibre, rubber, plastics etc. in the Industrial Engineering, or other have in the production of various products of flow liquid process, and in order to operate in the parameter area of expectation, these engineerings must be monitored.
Transmitter has become and has been used to describe the apparatus term that is connected to process device and is used for the sensing process variable.Example process variables comprises pressure, temperature, flow and other.Usually, transmitter is positioned at remote location (promptly at the scene).And the process variable of sensing sent back to central control room by several processes, comprise that wired and multiple technologies radio communication all are used to the process variable that sends.
Industry pressure unit commonly used is the hydrodynamic pressure of measuring process at present, pressure unit can directly be measured and comprise pressure reduction, absolute pressure and surface pressing etc., typical pressure unit comprises the pressure transducer that is connected to process fluid through shielding system, and this shielding system comprises: the barrier film that can contact with process fluid physics; The isolation fill fluid that between barrier film and pressure transducer, extends.This isolation fill fluid preferably comprises such as the incoercible in fact fluid of wet goods, when the process fluid is exerted pressure to barrier film, institute's applied pressure is through the fill fluid transmission and arrive pressure transducer, via the signal amplifying apparatus beyond the pressure unit, signal conversion equipment etc. signal is done further integration processing from pressure transducer again, and finally output in the computer or PLC system of central control room.
Yet this pressure unit commonly used comes resistance to elevated temperatures poor, the signal that barrier film, fill fluid and pressure transducer transmitted since thermal effect or with the variation of ambient temperature variation etc. is regular inaccurate; Moreover, because this pressure unit itself does not have the corresponding signal process system, but to finish by the equipment beyond the transmitter, therefore signal is through the repeatedly transmission of different approaches, error rate rises greatly, and signal intensity weakens greatly, and lag error is bigger, stability is poor, is unfavorable for the integration processing of signal and final monitoring.
The utility model content
For solving the problem that pressure unit commonly used in the aforementioned background art exists, the utility model provides a kind of high temperature pressure transmitter that is used to measure and monitor high temperature process stream, comprise: be in the pressure-sensitive diaphragm in the high temperature process stream, be positioned at the kapillary that the pressure-sensitive diaphragm upper end is connected with pressure-sensitive diaphragm, be positioned at the elastic body of kapillary upper end and be positioned at the strainometer that the elastic body upper end is connected with elastic body, its described strainometer upper end is connected with one and the gained signal directly can be amplified and the many amplifier amplifying circuit chip compatible mutually with long distance control system, and described pressure-sensitive diaphragm adopts through stress relief and hardness promotes and the stainless steel Armoloy coating diaphragm of the 15-5PH of process vacuum heat and vacuum titanium carbide coating film treatment, described kapillary is that diameter is the metal capillary of 0.3mm, described elastic body is made of elastomeric alloy material, and described pressure-sensitive diaphragm, metal capillary, elastic body, strainometers etc. are common to be formed strain bridge and carries out directly whole to signal and handle by many amplifiers amplifying circuit chip, has not only reduced because thermal effect or the regular inaccurate problem such as variation with the variation of ambient temperature; And signal need not greatly reduce error rate through the repeatedly transmission of different approaches, and signal intensity also strengthens greatly.
The beneficial effects of the utility model are, have the good temperature resistance energy, and long-time stability are good, and lag error is little, and good reproducibility is low in energy consumption, and anti-interference is good, and volume is little.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further detailed.
Fig. 1 is the structural representation of the utility model high temperature pressure transmitter.
Fig. 2 is as shown in Figure 1 pressure-sensitive diaphragm and a partial enlarged drawing capillaceous in the utility model high temperature pressure transmitter.
Fig. 3 be in the utility model high temperature pressure transmitter as shown in Figure 1 elastic body and the partial enlarged drawing of strainometer etc.
Fig. 4 is as shown in Figure 1 the enlarged drawing of many amplifiers amplifying circuit chip in the utility model high temperature pressure transmitter
Among the figure: 1, high temperature pressure transmitter, 101, pressure-sensitive diaphragm, 102, kapillary, 104, threaded rod, 105, elastic body, 106, strainometer, 107, many amplifiers amplifying circuit chip
Embodiment
As shown in the figure, the utility model provides a kind of high temperature pressure transmitter 1 that is used to measure and monitor high temperature process stream, this high temperature pressure transmitter 1 comprises from bottom to top successively: with the contacted pressure-sensitive diaphragm 101 of high temperature process stream that flows, described pressure-sensitive diaphragm 101 adopts through stress relief and hardness promotes and the stainless steel Armoloy coating diaphragm of the 15-5PH of process vacuum heat and vacuum titanium carbide coating film treatment, and it has the good temperature resistance energy; Be connected in pressure-sensitive diaphragm 101 and be positioned at the kapillary 102 of pressure-sensitive diaphragm 101 upper ends, described kapillary is that diameter is the metal capillary of 0.3mm, it is good that it has long-time stability, advantage such as not fragile, and described kapillary 102 outsides are wrapped up by threaded rod 104, and promptly kapillary 102 is through threaded rod 104 inside; Be positioned at the pressure-sensitive head that kapillary 102 upper ends are connected with kapillary 102; Be welded on elastic body 105 on the pressure-sensitive head in described pressure-sensitive head upper end with the plasma welding machine that is beneficial to the signal transmission, described elastic body 105 is made of elastomeric alloy material; Be positioned at elastic body 105 upper ends and stickup high temperature resistant, high-precision strainometer 106 thereon, elements such as the pressure-sensitive head of described kapillary 102 upper ends, elastic body 105, strainometer 106 all are placed in the housing of a sealing; Many amplifiers amplifying circuit chip 107 with strainometer 106 electric connections, include the CMOS integrated circuit that electric signal that strainometer 106 conversions are next and digital signal are enlarged into standard signal and digital communication signal and output to long distance control system in described many amplifiers amplifying circuit chip 107, wherein the amplifying circuit of Cai Yonging is the anti-interference amplifying circuit of common mode, it can directly amplify the gained signal and be compatible mutually with long distance control system, directly 0/5V, the 0/10V, 4/20MA and the Hart protocol signal that amplify of output to computer or PLC system to carry out long-range measurement and monitoring.
The course of work of the present utility model is, pressure when the tested high temperature process stream that flows, by pressure-sensitive diaphragm 101, to transmit at 1: 1 and by filling the kapillary 102 that completely transmits medium incoercible in fact fluids such as (normally) oils, and be delivered on the elastic body 105 that posts strainometer 106 by the pressure-sensitive head that is connected with kapillary 102, be attached to strainometer 106 on the elastic body 105 because strain resistor, form Wheatstone bridge, be the described pressure-sensitive diaphragm 101 that is in the high temperature process stream, be positioned at the kapillary 102 that pressure-sensitive diaphragm 101 upper ends are connected with pressure-sensitive diaphragm, be positioned at the elastic body 105 of kapillary 102 upper ends and be positioned at the strainometer 106 common composition strain resistors that are connected with elastic body on the elastic body produce change in resistance with mechanical deformation strain bridge.Based on Hooke's law: in elastic limit, the deformation of object converts pressure to linear electric signal by the metal strain meter 106 on the elastic body 105 with the principle that the external force that causes deformation is directly proportional, under pressure promptly, pressure-sensitive diaphragm 101 produces distortion, after the strainometer 106 of elastic body 105 upper ends is experienced its deformation, the electric signal that the effect that has a resistance and output are directly proportional with the applied pressure size, amplify integration via 107 pairs of these electric signal of many amplifiers amplifying circuit chip again with strainometer 106 electric connections, be that the CMOS integrated circuit is enlarged into standard signal and digital communication signal with strainometer 106 electrical signal converted, directly output is amplified standard signal and is carried out the teletransmission process control in computer or PLC system.
Claims (10)
1. high temperature pressure transmitter that is used to measure and monitor high temperature process stream, comprise: be in the pressure-sensitive diaphragm in the high temperature process stream, be positioned at kapillary that pressure-sensitive diaphragm upper end is connected with pressure-sensitive diaphragm, be positioned at the elastic body of kapillary upper end and be positioned at the strainometer that the elastic body upper end is connected with elastic body, it is characterized in that: described strainometer upper end be electrically connected with one can with the gained signal directly amplification and with long distance control system many amplifiers amplifying circuit chip of compatibility mutually.
2. high temperature pressure transmitter as claimed in claim 1 is characterized in that: include the CMOS integrated circuit that electric signal that the strainometer conversion is next and digital signal are enlarged into standard signal and digital communication signal and output to long distance control system in the described amplifier amplifying circuit chip.
3. high temperature pressure transmitter as claimed in claim 1 is characterized in that: the amplifying circuit that adopts in described many amplifiers amplifying circuit chip is the anti-interference amplifying circuit of common mode.
4, high temperature pressure transmitter as claimed in claim 1 is characterized in that: described is 0/5V, 0/10V, 4/20MA and Hart protocol signal through many amplifiers amplifying circuit chip amplifying signal.
5, high temperature pressure transmitter as claimed in claim 1, it is characterized in that: the described pressure-sensitive diaphragm that is in the high temperature process stream is positioned at kapillary that pressure-sensitive diaphragm upper end is connected with pressure-sensitive diaphragm, is positioned at the elastic body of kapillary upper end and is positioned at the strainometer that is connected with elastic body on the elastic body and form strain resistor produces change in resistance with mechanical deformation strain bridge jointly.
6, high temperature pressure transmitter as claimed in claim 1 is characterized in that: described pressure-sensitive diaphragm adopts through stress relief and hardness promotes and the stainless steel Armoloy coating diaphragm of the 15-5PH of process vacuum heat and vacuum titanium carbide coating film treatment.
7, high temperature pressure transmitter as claimed in claim 1 is characterized in that: described kapillary is that diameter is the metal capillary of 0.3mm.
8, high temperature pressure transmitter as claimed in claim 1 is characterized in that: described elastic body is made of elastomeric alloy material.
9, high temperature pressure transmitter as claimed in claim 1 is characterized in that: described kapillary upper end is provided with a pressure-sensitive head that is connected with kapillary, and described elastic body is welded on the pressure-sensitive head with the plasma welding machine that is beneficial to the signal transmission.
10, high temperature pressure transmitter as claimed in claim 9 is characterized in that: elements such as the pressure-sensitive head of described kapillary upper end, elastic body, strainometer all are placed in the housing of a sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201519203U CN201289417Y (en) | 2008-08-13 | 2008-08-13 | High-temperature pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201519203U CN201289417Y (en) | 2008-08-13 | 2008-08-13 | High-temperature pressure transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201289417Y true CN201289417Y (en) | 2009-08-12 |
Family
ID=40981101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201519203U Expired - Lifetime CN201289417Y (en) | 2008-08-13 | 2008-08-13 | High-temperature pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201289417Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937500A (en) * | 2011-08-15 | 2013-02-20 | 上海朝辉压力仪器有限公司 | Automatic zero setting pressure transmitter for high-temperature melt |
| CN103913265A (en) * | 2013-01-05 | 2014-07-09 | 上海朝辉压力仪器有限公司 | Push-rod-type pressure transmitter |
-
2008
- 2008-08-13 CN CNU2008201519203U patent/CN201289417Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937500A (en) * | 2011-08-15 | 2013-02-20 | 上海朝辉压力仪器有限公司 | Automatic zero setting pressure transmitter for high-temperature melt |
| CN103913265A (en) * | 2013-01-05 | 2014-07-09 | 上海朝辉压力仪器有限公司 | Push-rod-type pressure transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ROPER INDUSTRIES TRADING CO., LTD. Free format text: FORMER OWNER: HAOYING MEASURING TECHNOLOGY CO., LTD., SHANGHAI Effective date: 20120428 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201108 MINHANG, SHANGHAI TO: 200082 YANGPU, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120428 Address after: 200082, room 970, 1609 Dalian Road, Shanghai, Yangpu District Patentee after: Shanghai industries Trading Co. Ltd. Address before: 201108 Shanghai city Minhang District Huaning road 3740 Lane 125 Patentee before: Shanghai HaoYing Measurement & Control Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: DYNISCO (SHANGHAI) INSTRUMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI ROPER INDUSTRIES TRADING CO., LTD. Effective date: 20141023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200082 YANGPU, SHANGHAI TO: 201100 MINHANG, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20141023 Address after: 201100 Shanghai City, Minhang District Shen Fu Road No. 800 Building 2 Patentee after: Celanese (Shanghai) instrument & Meter Co., Ltd. Address before: 200082, room 970, 1609 Dalian Road, Shanghai, Yangpu District Patentee before: Shanghai industries Trading Co. Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090812 |