CN100535622C - Variable scale differential pressure transmitter - Google Patents
Variable scale differential pressure transmitter Download PDFInfo
- Publication number
- CN100535622C CN100535622C CNB2008100074438A CN200810007443A CN100535622C CN 100535622 C CN100535622 C CN 100535622C CN B2008100074438 A CNB2008100074438 A CN B2008100074438A CN 200810007443 A CN200810007443 A CN 200810007443A CN 100535622 C CN100535622 C CN 100535622C
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- Prior art keywords
- differential pressure
- terminal box
- shell
- pressure transmitter
- variable scale
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Abstract
A variable dimensions differential pressure transducer comprises a shell, an outward flange arranged at lower end of the shell, a connection box arranged on a lateral side of the shell, a connecting screw-thread and an O-shaped ring arranged at upper end of the shell, a discharging valve for air and liquid arranged at the outward flange, wherein two inner flanges arranged at the outward flange are perpendicular to the outward flange, a sensing device is arranged between the two inner flanges and sealed by welding, an O-shaped collar is arranged on the outside of the middle portion of the discharging valve for air and liquid, while a sealing gasket is arranged at inside. The variable dimensions differential pressure transducer is capable of preventing pinch stress from influencing on output signal of conventional differential pressure transducer, thereby has the advantages of reliable performance, small volume, low cost, convenient using, flexible production and increasing variety.
Description
Technical field
The present invention relates to a kind of differential pressure transmitter, particularly relate to a kind of differential pressure transmitter of scalable, belong to the industrial automation instrument technical field.
Background technology
Differential pressure transmitter is mainly used in differential pressure, pressure, liquid level and the density of measuring liquid, gas or steam, converts thereof into the DC signal output of 4～20mA then.
Differential pressure transmitter comprises DP type (fundamental mode), three types on HP type (high static pressure) and DR type (elementary errors pressure).More than three class transmitters amplify the plate combination with intelligence, can constitute intelligent differential pressure transmitter, it can be set and monitor by the mutual communication of the manual operator that meets the HART agreement.
The high differential static pressure pressure transmitter of HP type is a kind of differential pressure transmitter that is applicable to petrochemical industry and power station high-tension unit, because it is withstand voltage up to 32MPa, and can bears single-track overload pressure and is not damaged, and therefore can be used for the differential pressure measurement of high-pressure system reliably.
DR type differential pressure transmitter can convert small differential pressure to the DC signal of 4～20mA, and it adopts custom-designed amplifying circuit board and special temperature compensation technology, and is stable and reliable for performance.It is the ideal product that is used for fire box's minute-pressure, once detects with secondary air flow and air flow losses.
The gordian technique of differential pressure transmitter comprises sensor/software/hardware/structure etc., and wherein structure is bigger to the volume/kind/manufacturing process/cost impact of product.
Conventional structure of transmitter comprises sensor, sensor outer housing, and the clamping connection flange, lock-screw, electronic shell is formed.Sensor is contained in the sensor outer housing, clamps upper end and electronic shell sealed attachment by lock-screw with two clamping flanges.
This version of conventional transmitter, clamping flange can produce clamping stress to sensor, clamps stress and will exert an influence to sensor output signal on electrical characteristics, causes the instability of measurement result and strengthens measuring error.
Summary of the invention
The objective of the invention is to have overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of modular construction of tackling various application, can make the production of differential pressure transmitter realize flexible combination, save cost, increase kind, and make small product size narrow down to 1/2 of conventional products, on electrical characteristics, eliminated and clamped the influence of stress in the conventional products output signal, when improving performance, the variable scale differential pressure transmitter that manufacturing cost reduces significantly.
The technical scheme of variable scale differential pressure transmitter of the present invention is achieved in that a kind of variable scale differential pressure transmitter, comprise shell and be arranged on the outside flange of shell lower end, two inner flanges are set above the described outside flange, described two inner flanges and described outside flange are perpendicular, sensor is set and passes through welded seal between described two inner flanges, described shell side is provided with terminal box, described shell upper end is provided with connecting thread, O shape circle, and described shell connects electronic unit and passes through seal with O ring by connecting thread.
And described outside flange is provided with the exhaust tapping valve that can screw, and the outside, middle part of described exhaust tapping valve is provided with O shape ring, and exhaust tapping valve sealing gasket is established in the inboard, middle part of exhaust tapping valve.
And be provided with connector cover outside the described terminal box, and being provided with sealing gasket between described connector cover and the terminal box, described terminal box is a rectangle, adopts end face to compress seal form, effectively seals by sealing gasket and connector cover.
And establish through wires hole and underpass hole between described shell and the terminal box, described sensor is connected with electronic unit and described terminal box with the underpass hole by last through wires hole.
And all right setting pressure sensor in the described inner flange outside, be not with the pressure compensation product up-gradation to become band pressure compensation product so that make.
And connecting thread can also be passed through in described shell upper end, O shape circle connects a cast aluminium anti-explosion terminal box, so that can constitute the differential pressure transmitter of another kind of scale, cast aluminium anti-explosion terminal box inside can also connect a battery component as standby power supply.
Variable scale differential pressure transmitter of the present invention has following advantage with respect to prior art:
1, two inner flanges of the present invention and sensor weld together, and have eliminated in the prior art to connect the influence of the clamping stress of sensor to output signal by clamping flange, so have been significantly improved on the performance.
2, electronic unit of the present invention is that level is installed, and has dwindled the distance between sensor and the electronic unit, makes transmitter littler, and sensor and shell are fitted together, make whole height reduce by 1/3rd, therefore reduced volume, install and use more convenient.
3, the present invention has adopted modular construction, makes production can realize flexible combination, has saved cost, has increased kind.
Description of drawings
Fig. 1 is provided with the planimetric map of electronic unit for variable scale differential pressure transmitter of the present invention;
Fig. 2 is provided with the sectional view of electronic unit for variable scale differential pressure transmitter of the present invention;
Fig. 3 is a variable scale differential pressure transmitter sensor connection layout of the present invention;
Fig. 4 is a variable scale differential pressure transmitter outside flange sectional view of the present invention;
Fig. 5 is a variable scale differential pressure transmitter terminal box sectional view of the present invention;
Fig. 6 is a variable scale differential pressure transmitter band cast aluminium anti-explosion terminal box connection diagram of the present invention;
Fig. 7 is variable scale differential pressure transmitter shell upper end connecting thread of the present invention and O-ring seal part sectioned view;
Fig. 8 is the planimetric map that battery component is installed in the variable scale differential pressure transmitter band cast aluminium anti-explosion terminal box of the present invention;
Fig. 9 is the sectional view that battery component is installed in the variable scale differential pressure transmitter band cast aluminium anti-explosion terminal box of the present invention.
Figure number explanation: 1, shell, 2, outside flange, 3, terminal box, 4, electronic unit, 5, sensor, 6, inner flange, 7, exhaust tapping valve, 8, O shape ring, 9, exhaust tapping valve sealing gasket, 10, pressure transducer, 11, go up through wires hole, 12, the underpass hole, 13, terminal box sealing gasket, 14, connector cover, 15, the cast aluminium anti-explosion terminal box, 16, connecting thread, 17, O shape circle, 18, battery component.
Embodiment
In order to make one of ordinary skill in the art can understand technical scheme of the present invention, now in conjunction with the accompanying drawings specific embodiments of the invention are described further:
Variable scale differential pressure transmitter of the present invention, referring to figs. 1 through Fig. 9, comprise shell 1 and be arranged on the outside flange 2 of shell 1 lower end, two inner flanges 6 are set above the described outside flange 2, described two inner flanges 6 and described outside flange 2 are perpendicular, sensor 5 is set between described two inner flanges 6 and passes through welded seal, described shell 1 side is provided with terminal box 3, the upper end is provided with connecting thread 16, O shape circle 17, and described shell 1 connects electronic units 4 and passes through 17 sealings of O shape circle by connecting thread 16.
As Fig. 4, outside flange 2 is provided with the exhaust tapping valve 7 that can screw, the outside, middle part of exhaust tapping valve 7 is provided with O shape ring 8, the inboard is provided with exhaust tapping valve sealing gasket 9, when rotating exhaust tapping valve 8, exhaust tapping valve sealing gasket 9 is unclamped, this moment, gas can be discharged from outside flange 2, was rotated further exhaust tapping valve 8 up to screwing out fully, then played the discharge opeing effect.
As Fig. 5, terminal box 3 outsides are provided with connector cover 14, are provided with terminal box sealing gasket 13 between connector cover 14 and terminal box 3 connect, and terminal box 3 is a rectangle, adopt end face to compress seal form, effectively seal by terminal box sealing gasket 13 and connector cover 14.
As Fig. 5, establish through wires hole 11 and underpass hole 12 between shell 1 and the terminal box 3, sensor 5 is connected with electronic unit 4 and terminal box 3 with underpass hole 12 by last through wires hole 11.
As Fig. 6,7, shell 1 upper end is connected with electronic unit 4 by connecting thread 16 and seals by O shape circle 17.
As Fig. 3, all right setting pressure sensor 10 in inner flange 6 outsides is so that make the band pressure compensation and be not with pressure compensated product to realize modular combination.
As Fig. 6,8,9, connecting thread 16 can also be passed through in shell 1 upper end, O shape circle 17 connects a cast aluminium anti-explosion terminal box 15, so that can constitute the differential pressure transmitter of another kind of scale, cast aluminium anti-explosion terminal box 15 inside can also connect a battery component 18 as standby power supply.
The present invention is not limited to above-mentioned best mode, and anyone can draw the product of other form under enlightenment of the present invention, no matter but on its shape or structure, do any variation, every the above feature of employing all within protection scope of the present invention.
Claims (5)
1, a kind of variable scale differential pressure transmitter, comprise shell (1) and be arranged on shell (1) lower end outside flange (2), it is characterized in that, two inner flanges (6) are set above the described outside flange (2), described two inner flanges (6) are perpendicular with described outside flange (2), sensor (5) is set between described two inner flanges (6) and passes through welded seal, the side of described shell (1) is provided with terminal box (3), the upper end of described shell (1) is provided with connecting thread (16), O shape circle (17), described shell (1) connects electronic unit (4) and passes through O shape circle (17) sealing by connecting thread (16).
2, variable scale differential pressure transmitter according to claim 1, it is characterized in that, described outside flange (2) is provided with the exhaust tapping valve (7) that can screw, the outside, middle part of described exhaust tapping valve (7) is provided with O shape ring (8), and the inboard, middle part of described exhaust tapping valve (7) is provided with exhaust tapping valve sealing gasket (9).
3, variable scale differential pressure transmitter according to claim 1, it is characterized in that, described terminal box (3) outside is provided with connector cover (14), is provided with terminal box sealing gasket (13) between described connector cover (14) and the terminal box (3), and described terminal box (3) is a rectangle.
4, variable scale differential pressure transmitter according to claim 1, it is characterized in that, establish through wires hole (11) and underpass hole (12) between described shell (1) and the described terminal box (3), described sensor (5) is connected with electronic unit (4) and terminal box (3) with underpass hole (12) by last through wires hole (11).
5, variable scale differential pressure transmitter according to claim 1 is characterized in that, described electronic unit (4) side is provided with battery component (18), and the outside of described battery component (18) is provided with cast aluminium anti-explosion terminal box (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100074438A CN100535622C (en) | 2008-03-10 | 2008-03-10 | Variable scale differential pressure transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100074438A CN100535622C (en) | 2008-03-10 | 2008-03-10 | Variable scale differential pressure transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101236118A CN101236118A (en) | 2008-08-06 |
| CN100535622C true CN100535622C (en) | 2009-09-02 |
Family
ID=39919894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100074438A Expired - Fee Related CN100535622C (en) | 2008-03-10 | 2008-03-10 | Variable scale differential pressure transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100535622C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5920016A (en) * | 1996-06-13 | 1999-07-06 | Rosemount Inc. | Apparatus for coupling a transmitter to process fluid |
| CN1099584C (en) * | 1994-08-22 | 2003-01-22 | 福克斯保罗公司 | Differential pressure transmitter |
| DE10347861A1 (en) * | 2003-10-10 | 2005-04-28 | Endress & Hauser Gmbh & Co Kg | Measurement transducer e.g. for pressure sensor, has housing and sensor element arranged in transducer with housing having locking flange creating integrated positive pressure. |
| CN101086464A (en) * | 2006-06-08 | 2007-12-12 | 上海海星阀门总厂 | High-temperature pressure sensor with double air relief valve and double flange |
| CN201173838Y (en) * | 2008-03-10 | 2008-12-31 | 李岩峰 | Variable scale differential pressure transmitter |
-
2008
- 2008-03-10 CN CNB2008100074438A patent/CN100535622C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099584C (en) * | 1994-08-22 | 2003-01-22 | 福克斯保罗公司 | Differential pressure transmitter |
| US5920016A (en) * | 1996-06-13 | 1999-07-06 | Rosemount Inc. | Apparatus for coupling a transmitter to process fluid |
| DE10347861A1 (en) * | 2003-10-10 | 2005-04-28 | Endress & Hauser Gmbh & Co Kg | Measurement transducer e.g. for pressure sensor, has housing and sensor element arranged in transducer with housing having locking flange creating integrated positive pressure. |
| CN101086464A (en) * | 2006-06-08 | 2007-12-12 | 上海海星阀门总厂 | High-temperature pressure sensor with double air relief valve and double flange |
| CN201173838Y (en) * | 2008-03-10 | 2008-12-31 | 李岩峰 | Variable scale differential pressure transmitter |
Non-Patent Citations (1)
| Title |
|---|
| CN201173838Y(ZL200820005200.6) 2008.12.31 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101236118A (en) | 2008-08-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Sailsors Instruments Co., Ltd. Assignor: Li Yanfeng Contract record no.: 2011990001030 Denomination of invention: Variable scale differential pressure transmitter Granted publication date: 20090902 License type: Exclusive License Open date: 20080806 Record date: 20111109 |
|
| ASS | Succession or assignment of patent right |
Owner name: BEIJING SAILSORS INSTRUMENTS LTD. Free format text: FORMER OWNER: LI YANFENG Effective date: 20120428 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120428 Address after: 100083 Beijing Haidian District city Zhi village community Haitai building room 621 Patentee after: Sailsors Instruments Ltd. Beijing Address before: North Fourth Ring Road 100083 Beijing Haidian District City 229 Haitai building room 723 Patentee before: Li Yanfeng |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090902 Termination date: 20160310 |