CN205373948U - High overload protection ressure measurement instrument - Google Patents
High overload protection ressure measurement instrument Download PDFInfo
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- CN205373948U CN205373948U CN201520958031.8U CN201520958031U CN205373948U CN 205373948 U CN205373948 U CN 205373948U CN 201520958031 U CN201520958031 U CN 201520958031U CN 205373948 U CN205373948 U CN 205373948U
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Abstract
The utility model discloses a high overload protection ressure measurement instrument, which comprises a base, the base member, show the gauge outfit, casing and control circuit, the welding has the adaptor between base and the base member, the welding has central diaphragm in the base member, the welding of the base member top outside has the lantern ring, the sensor welding is between the top of the inboard of the lantern ring and base member, ventilative stopper is installed to cover ring side wall lower extreme, the casing is twisted and is closed on the lantern ring, install the demonstration gauge outfit in the casing, the button, magnetism pole board and isolation terminal outgoing lines, control circuit is including connecting the miniaturation EMC circuit on the MCU controller, high accuracy excitation current circuit, pressure temperature measuring circuit, the display circuit, HART bus interface circuit and erasable ferroelectric memory circuit. The utility model discloses can effectively prevent the sensor and damage because transship that the biggest antioverloading pressure can reach 40 times ranges, the effective anti dewing of ability, aqueous vapor seepage, can prevent effectively that the surge from destroying and electromagnetic interference.
Description
Technical field
This utility model relates to measurement device field, specifically a kind of high overload protection pressure-measuring instrument.
Background technology
Pressure temperature measuring instrument can effectively measure the technological parameter of pressure and temperature because of it, is therefore widely used in the manufacturings such as chemical industry, machinery, food.The temperature, pressure measuring instrument used in the market, its product adopts secondary to charge structure, and what this oil-filled structure adopted exposed charges hole, easily hide dirt after long-term use, therefore it is unfavorable for that cleaning cleans, causes charging operation and cannot be carried out, cause that measuring instrument damages；This measuring instrument adopts internal sensor ventilating structure simultaneously, need to be drawn ventilative for sensor by silica gel tube, run not only bad for the full dosing technology of wiring board, and easily cause permeability cell blocking, thus affecting measurement accuracy of instrument, time serious, cause that sensor damages because of pressure overload.
Utility model content
The purpose of this utility model is in that to provide a kind of high overload protection pressure-measuring instrument, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, this utility model provides following technical scheme:
A kind of high overload protection pressure-measuring instrument; including pedestal, matrix, display gauge head, housing and control circuit; described matrix includes A matrix and B matrix; it is welded with adaptor between described pedestal and B matrix; and between the lower end of B matrix and adaptor, form pressure-sensitive chamber; the lower center of described A matrix is welded with center diaphragm, and the lower end of center diaphragm and A matrix forms reference cavity；Described A matrix is welded on B matrix upper end, it is welded with the collar outside the top of described A matrix, sensor is welded between the inner side of the collar and the top of A matrix, the side wall lower ends of the described collar is provided with porous plug, described housing screws up on the collar, and between housing and the collar, it is provided with O RunddichtringO, described LCD display gauge head is arranged on one end of housing, the top of described housing is provided with button, being provided with the magnetic bar plate being positioned at button lower end in described housing, the other end of described housing is provided with and isolates line terminals；
Described control circuit includes the microminiaturized EMC circuit, high accuracy exciting current circuit, pressure temperature measuring circuit, display circuit, HART bus interface circuit and the erasable FeRAM circuit that are connected on MCU controller, described pressure temperature measuring circuit connects sensor, and described LCD display circuit connects LCD display gauge head.
As further program of the utility model: described pressure-sensitive intracavity filling has vacuum filling liquid.
As this utility model further scheme: described display gauge head adopts 5 or 8 multi-line display.
Compared with prior art, the beneficial effects of the utility model are:
1, adoptManyChamber antioverloading design, pressure-sensitive chamber and reference cavity are kept apart by center diaphragm, when pressure is more than design flow stroke pressure, center diaphragm action protection, effectively prevent sensor and damage because of overload, maximum antioverloading pressure can reach range 40 times；
2, adopt the design of concealed type ventilating structure, effectively prevent condensation, aqueous vapor seepage；
3, adopt outside magnetic lever switch design, meet and need not uncap, it is possible to measurement instrument parameter is set；
4, use excellent outlet isolation terminal, can effectively prevent surge from destroying and electromagnetic interference；
5, display gauge head adopts 5 or 8 multi-line display of large-size screen monitors, low-power consumption, and display more meets the demand of process industry.
Accompanying drawing explanation
Fig. 1 is overall schematic of the present utility model.
Fig. 2 is the profile of N-N in Fig. 1.
Fig. 3 is the circuit diagram of this utility model MCU controller.
Fig. 4 is microminiaturized EMC circuit diagram in this utility model.
Fig. 5 is high accuracy exciting current circuit in this utility model.
Fig. 6 is pressure temperature measuring circuit diagram in this utility model.
Fig. 7 and Fig. 8 is HART bus interface circuit figure in this utility model.
Fig. 9 is erasable FeRAM circuit figure in this utility model.
In figure: 1-pedestal；2-adaptor；3-B matrix；4-A matrix；5-O RunddichtringO；6-vacuum filling liquid；7-center diaphragm；8-porous plug；9-LCD display gauge head；10-housing；11-isolates line terminals；12-button；13-magnetic bar plate；14-sensor；The 15-collar.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1～2; in this utility model embodiment; a kind of high overload protection pressure-measuring instrument; including pedestal 1, matrix, display gauge head 9, housing 10 and control circuit; matrix includes A matrix 4 and B matrix 3; being welded with adaptor 2 between pedestal and B matrix 3, and form pressure-sensitive chamber between the lower end of B matrix 3 and adaptor 2, pressure-sensitive intracavity filling has vacuum filling liquid 6；The lower center of A matrix 4 is welded with center diaphragm 7, and the lower end of center diaphragm 7 and A matrix 4 forms reference cavity.
A matrix 4 is welded on B matrix 3 upper end, the collar 15 it is welded with outside the top of A matrix 4, sensor 14 is welded between the inner side of the collar 15 and the top of A matrix 4, the side wall lower ends of the collar 15 is provided with porous plug 8, housing 10 screws up on the collar 15, and between housing 10 and the collar 15, it is provided with O RunddichtringO 5, display gauge head 9 is arranged on one end of housing 10, the top of housing 10 is provided with button 12, being provided with the magnetic bar plate 13 being positioned at button 12 lower end in housing 10, the other end of housing 10 is provided with and isolates line terminals 11.
Such as Fig. 3～9, the control circuit of this utility model high overload protection pressure-measuring instrument includes the microminiaturized EMC circuit, high accuracy exciting current circuit, pressure temperature measuring circuit, display circuit, HART bus interface circuit and the erasable FeRAM circuit that are connected on MCU controller.
MCU controller as it is shown on figure 3, microminiaturized EMC circuit as shown in Figure 4, high accuracy exciting current circuit as it is shown in figure 5, pressure temperature measuring circuit as shown in Figure 6, as shown in Figure 7 and Figure 8, erasable FeRAM circuit is as shown in Figure 9 for HART bus interface circuit.
This utility model patent adopts and once charges structure, meets hygiene-type occasion and cleans cleaning use, and sensor carries outside ventilating structure, hides the ventilative design of air flue, natural permeable, can effectively prevent again condensation, aqueous vapor seepage.Breathe freely and line plate isolation design, it is to avoid the aqueous vapor impact on its performance.The internal full embedding structure of wiring board, it is ensured that its wiring board operation reliably and with long-term, is suitable for the use under various varying environment and runs.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and when without departing substantially from spirit of the present utility model or basic feature, it is possible to realize this utility model in other specific forms.Therefore, no matter from which point, embodiment all should be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims rather than described above, it is intended that all changes in the implication of the equivalency dropping on claim and scope included in this utility model.Any accompanying drawing labelling in claim should be considered as the claim that restriction is involved.
Claims (3)
1. a high overload protection pressure-measuring instrument; including pedestal (1), matrix, LCD display gauge head (9), housing (10) and control circuit; it is characterized in that; described matrix includes A matrix (4) and B matrix (3); adaptor (2) it is welded with between described pedestal (1) and B matrix (3); and between the lower end of B matrix (3) and adaptor (2), form pressure-sensitive chamber; the lower center of described A matrix (4) is welded with center diaphragm (7), and the lower end of center diaphragm (7) and A matrix (4) forms reference cavity；Described A matrix (4) is welded on B matrix (3) upper end, it is welded with the collar (15) outside the top of described A matrix (4), sensor (14) is welded between the inner side of the collar (15) and the top of A matrix (4), the side wall lower ends of the described collar (15) is provided with porous plug (8), described housing (10) screws up on the collar (15), and between housing (10) and the collar (15), it is provided with O RunddichtringO (5), described display gauge head (9) is arranged on one end of housing (10), the top of described housing (10) is provided with button (12), magnetic bar plate (13) being positioned at button (12) lower end it is provided with in described housing (10), the other end of described housing (10) is provided with and isolates line terminals (11)；
Described control circuit includes the microminiaturized EMC circuit, high accuracy exciting current circuit, pressure temperature measuring circuit, display circuit, HART bus interface circuit and the erasable ferroelectric memory circuit that are connected on MCU controller, described pressure temperature measuring circuit connects sensor, and described display circuit connects display gauge head.
2. high overload according to claim 1 protection pressure-measuring instrument, it is characterised in that described pressure-sensitive intracavity filling has vacuum filling liquid (6).
3. high overload according to claim 1 protection pressure-measuring instrument, it is characterised in that described display gauge head adopts 5 or 8 multi-line display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520958031.8U CN205373948U (en) | 2015-11-27 | 2015-11-27 | High overload protection ressure measurement instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520958031.8U CN205373948U (en) | 2015-11-27 | 2015-11-27 | High overload protection ressure measurement instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205373948U true CN205373948U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520958031.8U Active CN205373948U (en) | 2015-11-27 | 2015-11-27 | High overload protection ressure measurement instrument |
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| Country | Link |
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| CN (1) | CN205373948U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489728A (en) * | 2018-12-14 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | A kind of sensor |
-
2015
- 2015-11-27 CN CN201520958031.8U patent/CN205373948U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489728A (en) * | 2018-12-14 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | A kind of sensor |
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