CN101957249A - Differential pressure measurement device and overload protection device thereof - Google Patents
Differential pressure measurement device and overload protection device thereof Download PDFInfo
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- CN101957249A CN101957249A CN 201010295297 CN201010295297A CN101957249A CN 101957249 A CN101957249 A CN 101957249A CN 201010295297 CN201010295297 CN 201010295297 CN 201010295297 A CN201010295297 A CN 201010295297A CN 101957249 A CN101957249 A CN 101957249A
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- cavity volume
- gas conduit
- differential pressure
- overload protection
- gas
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Abstract
The invention discloses a differential pressure measurement device, which comprises a differential pressure sensor and a first vent valve. One end of the differential pressure sensor is communicated with one end of the vent valve through a first gas conduit; the other end of the differential pressure sensor is communicated with the other end of the vent valve through a second gas conduit; the first gas conduit and the second gas conduit are respectively communicated with pressure stabilizing buffer devices; the pressure stabilizing buffer devices comprise buffer cavities; the first gas conduit and the second gas conduit are respectively communicated with one side of corresponding buffer cavities; the other side of the buffer cavities is respectively communicated with a third gas conduit and a fourth gas conduit; the inside diameter of the third gas conduit is smaller than that of the fourth gas conduit; and the fourth gas conduit is provided with a second vent valve. The differential pressure measurement device can ensure the accuracy of the differential pressure measurement and provides overload protection for the differential pressure sensor.
Description
Technical field
The present invention relates to a kind of differential pressure measuring installation.
Background technology
At present; the closure of measuring vessel and the pressure condition of breather line; general directly arrange that in its vent path a differential pressure pick-up detects air-flow and gas pressure change; but during gas communication; pressure constantly changes; the slow pressure effect of breather line simultaneously is less; it is too urgent that pressure usually changes because cause pressure to change too rapidly; thereby make measuring error big; and differential pressure pick-up is breakdown easily; and differential pressure pick-up costs an arm and a leg, and therefore needs a kind of slow pressure device and overload protection arrangement to come subsidiary.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of new differential pressure measuring installation and overload protection arrangement thereof are provided.
For achieving the above object, the technical solution used in the present invention is: differential pressure measuring installation of the present invention comprises the differential pressure pickup and first breather valve, one end of differential pressure pickup is communicated with by first gas conduit with an end of first breather valve, the other end of differential pressure pickup is communicated with by second gas conduit with the other end of first breather valve, and described first gas conduit and second gas conduit are communicated with the voltage stabilizing snubber assembly separately; Described voltage stabilizing snubber assembly comprises the voltage stabilizing cushion chamber, described first gas conduit, second gas conduit are communicated with a side of corresponding voltage stabilizing cushion chamber respectively, the opposite side of voltage stabilizing cushion chamber is communicated with the 3rd gas conduit, the 4th gas conduit respectively, the internal diameter of the 3rd gas conduit is equipped with second breather valve less than the internal diameter of the 4th gas conduit on the 4th gas conduit.
Further, differential pressure measuring installation of the present invention also comprises first overload protection arrangement and second overload protection arrangement, and the air intake opening of first overload protection arrangement is communicated with first gas conduit, and the gas outlet of first overload protection arrangement is communicated with second gas conduit; The air intake opening of second overload protection arrangement is communicated with second gas conduit, and the gas outlet of second overload protection arrangement is communicated with first gas conduit.
Further; first overload protection arrangement and/or second overload protection arrangement in the differential pressure measuring installation of the present invention comprise the gas cavity volume; described gas cavity volume is separated into first cavity volume and second cavity volume by elastic sheet; described elastic sheet is penetrated with hollow stem; one end of described hollow stem places in first cavity volume; the other end of described hollow stem places in second cavity volume; the inner wall sealing of described first cavity volume is fixed with elastic sealing elements; place an end and the described elastic sealing elements in first cavity volume of described hollow stem are complementary; described first cavity volume is provided with air intake opening, and described second cavity volume is provided with the gas outlet.
Overload protection arrangement of the present invention comprises the gas cavity volume; described gas cavity volume is separated into first cavity volume and second cavity volume by elastic sheet; described elastic sheet is penetrated with hollow stem; one end of described hollow stem places in first cavity volume; the other end of described hollow stem places in second cavity volume; the inner wall sealing of described first cavity volume is fixed with elastic sealing elements; place an end and the described elastic sealing elements in first cavity volume of described hollow stem are complementary; described first cavity volume is provided with air intake opening, and described second cavity volume is provided with the gas outlet.
Compared with prior art; the invention has the beneficial effects as follows: the deficiency that easily differential pressure pick-up is caused punch through damage at existing differential pressure measurement device; the present invention has increased voltage stabilizing snubber assembly and overload protection arrangement; guarantee steadily carrying out of differential pressure measurement work with this; and when overload, differential pressure pick-up is effectively protected, reduce the loss.The present invention has the following advantages:
1) by increasing the voltage stabilizing snubber assembly, slow down rate of pressure change, the easier pressure that makes reaches stable, guarantees the accurate of differential pressure measurement;
2) by increasing the voltage stabilizing snubber assembly, reduce the pressure-difference fluctuation amplitude, reduce the possibility of differential pressure pickup overload, reduce the probability that differential pressure pickup damages;
3) by increasing overload protection arrangement, when pressure reduction transships, make differential pressure pick-up left and right sides gas conduit UNICOM, reduce pressure reduction, thereby the protection differential pressure pickup makes its not breakdown damage, reduces loss;
4) the overload protection arrangement deft design is highly sensitive, and overload protective function is effective;
5) the present invention is simple in structure, and is with low cost.
Description of drawings
Fig. 1 is the structural representation that the present invention does not install overload protection arrangement;
Fig. 2 is the structural representation that the present invention is equipped with overload protection arrangement;
Fig. 3 is the inner structure synoptic diagram (office is cutd open) of overload protection arrangement of the present invention.
Among the figure: 1, second breather valve, the 2, the 3rd gas conduit, 3, the voltage stabilizing cushion chamber; 4 the 4th gas conduits; 5, first breather valve, 6, differential pressure pickup, 7, first gas conduit; 8, second gas conduit; 9, voltage stabilizing snubber assembly, 10, first overload protection arrangement, 11, second overload protection arrangement; 12, elastic sheet; 13, first cavity volume, 14, second cavity volume, 15, middle control bar; 16, elastic sealing elements; 17, spring, 18, fastening bolt, 19, pad; 20, the air intake opening of first cavity volume, the gas outlet of 21, second cavity volume.
Embodiment
As shown in Figure 1; the differential pressure measuring installation that the present invention does not install overload protection arrangement comprises the differential pressure pickup 6 and first breather valve 5; one end of differential pressure pickup 6 is communicated with by first gas conduit 7 with an end of first breather valve 5, and the other end of differential pressure pickup 6 is communicated with by second gas conduit 8 with the other end of first breather valve 5.First gas conduit 7 and second gas conduit 8 are communicated with a voltage stabilizing snubber assembly 9 separately.In each voltage stabilizing snubber assembly 9, a voltage stabilizing cushion chamber 3 is respectively arranged, one side of the voltage stabilizing cushion chamber 3 in two voltage stabilizing snubber assemblys 9 correspondingly is communicated with first gas conduit 7, second gas conduit 8 respectively, and the opposite side of the voltage stabilizing cushion chamber 3 that two voltage stabilizing snubber assemblys 9 are interior then correspondingly is communicated with the 3rd gas conduit 2 and the 4th gas conduit 4 respectively.The internal diameter of the 3rd gas conduit 2 is less than the internal diameter of the 4th gas conduit 4, and the 4th gas conduit 4 is communicated with second breather valve 1.During work, the 3rd gas conduit 2 and the 4th gas conduit 4 of differential pressure measuring installation of the present invention are communicated with the tested container (not shown), first breather valve 5 and second breather valve 1 are opened, differential pressure measuring installation of the present invention begins tested container is inflated, because the 3rd gas conduit 2 bores are less than the 4th gas conduit 4, particularly when the 3rd gas conduit 2 bores during much smaller than the 4th gas conduit 4, fluid flow is mainly inflated by 4 pairs of differential pressure measuring installations of the present invention of the 4th gas conduit and tested container when inflation.When gas is full of substantially, close second breather valve 1, only inflate by the 3rd gas conduit 2 than tubule footpath, this moment, gas flow was less, and the big relatively volume of voltage stabilizing cushion chamber 3 can make that differential pressure measuring installation of the present invention and tested container air pressure inside are faster to be stablized.Treat that differential pressure measuring installation of the present invention and tested container internal gas pressure are stable, be differential pressure pickup 6 indication pressure reduction when being zero, stop inflation, close first breather valve 5, this moment, differential pressure measuring installation of the present invention was hedged off from the outer world, and first gas conduit 7 is not communicated with second gas conduit 8.Wait for a period of time, if tested container poor sealing, the air pressure and the ambient pressure of second gas conduit, 8 one sides of differential pressure measuring installation of the present invention do not wait, then can cause second gas conduit, the 8 one side gases of differential pressure measuring installation of the present invention to flow or extraneous inside flowing to the external world, and owing to first gas conduit 7 is not communicated with second gas conduit 8, differential pressure pickup 6 can be measured the gas differential pressure between first gas conduit 7 and second gas conduit 8, thereby can judge the quality of tested container sealing according to the pressure reduction that differential pressure pickup 6 is measured.
For avoiding when the pressure reduction between first gas conduit 7 and second gas conduit 8 is excessive, differential pressure pickup 6 is because of the breakdown damage of overload, and first overload protection arrangement 10 and second overload protection arrangement 11 can be further installed in the present invention additional.
Fig. 2 shows the structure that the differential pressure measuring installation of first overload protection arrangement 10 and second overload protection arrangement 11 has been installed in a kind of the present invention additional.Wherein, the air intake opening of first overload protection arrangement 10 is communicated with first gas conduit 7, and the gas outlet of first overload protection arrangement 10 is communicated with second gas conduit 8; The air intake opening of second overload protection arrangement 11 is communicated with second gas conduit 8, and the gas outlet of second overload protection arrangement 11 is communicated with first gas conduit 7.
As shown in Figure 2, overload protection arrangement has been installed in the present invention additional, and attached to increase the course of work as follows: when first gas conduit, 7 to the second gas conduits, 8 pressure big, when being about to cause differential pressure pickup 6 overloads, second overload protection arrangement 11 works, first gas conduit 7 is connected with second gas conduit 8, pressure reduction between first gas conduit 7 and second gas conduit 8 is reduced, prevent that differential pressure pickup from transshipping breakdown damage; When first gas conduit, 7 to the second gas conduits, 8 pressure little; when being about to cause differential pressure pickup 6 overloads; first overload protection arrangement 10 works; first gas conduit 7 is connected with second gas conduit 8; pressure reduction between first gas conduit 7 and second gas conduit 8 is reduced, prevent that differential pressure pickup from transshipping breakdown damage.
As preferred implementation of the present invention; as shown in Figure 3; first gas conduit 7 of overload protection arrangement of the present invention and the structure of second gas conduit 8 are: be provided with the gas cavity volume in first overload protection arrangement 10 and second overload protection arrangement 11; this gas cavity volume is separated into first cavity volume 13 and second cavity volume 14 by elastic sheet 12; described elastic sheet 12 is penetrated with a hollow stem 15; hollow stem 15 is by on fastening bolt 18 and the pad 19 fixed installation elastic sheets 12; wherein; one end of hollow stem 15 places in first cavity volume 13, and the other end of hollow stem 15 then places in second cavity volume 14.In second cavity volume 14 elastic device is installed, in structure shown in Figure 3, this elastic device is a spring 17 around hollow stem 15, and an end of spring 17 contacts with second cavity volume, 14 inwalls, and the other end of spring 17 then contacts with elastic sheet 12.The inner wall sealing of first cavity volume 13 is fixed with elastic sealing elements 16, for example caulking gum.Hollow stem 15 place a end in first cavity volume 13 to be complementary to form to seal with elastic sealing elements 16, first cavity volume 13 is provided with air intake opening 20, the second cavity volumes 14 and is provided with gas outlet 21.During work, 17 pairs of elastic sheets 12 of spring are exerted pressure to first cavity volume, 13 1 sides, and when the pressure differential of first cavity volume 13 and second cavity volume 14 during less than spring 17 pressure, hollow stem 15 is pressed together with elastic sealing elements 16, form sealing, first cavity volume 13 is not communicated with second cavity volume 14; When the pressure differential of first cavity volume 13 and second cavity volume 14 during greater than spring 17 pressure, hollow stem 15 is separated with elastic sealing elements 16, first cavity volume 13 is communicated with by the cavity in the hollow stem 15 with second cavity volume 14, and the pressure reduction between first cavity volume 13 and second cavity volume 14 is reduced.Among the present invention, because the air intake opening 20 of first cavity volume 13 of first overload protection arrangement 10 is communicated with first gas conduit 7, the gas outlet 21 of second cavity volume 14 of first overload protection arrangement 10 is communicated with second gas conduit 8; The air intake opening 20 of first cavity volume 13 of second overload protection arrangement 11 is communicated with second gas conduit 8, and the gas outlet 21 of second cavity volume 14 of second overload protection arrangement 11 is communicated with first gas conduit 7; By such setting; can be in that first gas conduit 7 and second gas conduit, 8 pressure reduction be excessive when being about to make differential pressure pickup 6 overloads; realization is communicated with by first overload protection arrangement 10 or second overload protection arrangement 11 between first gas conduit 7 and second gas conduit 8, realizes the overload protection to differential pressure pickup 6.
Claims (4)
1. differential pressure measuring installation, it is characterized in that: it comprises differential pressure pickup (6) and first breather valve (5), one end of differential pressure pickup (6) is communicated with by first gas conduit (7) with an end of first breather valve (5), the other end of differential pressure pickup (6) is communicated with by second gas conduit (8) with the other end of first breather valve (5), and described first gas conduit (7) and second gas conduit (8) are communicated with voltage stabilizing snubber assembly (9) separately; Described voltage stabilizing snubber assembly (9) comprises voltage stabilizing cushion chamber (3), described first gas conduit (7), second gas conduit (8) are communicated with a side of corresponding voltage stabilizing cushion chamber (3) respectively, the opposite side of voltage stabilizing cushion chamber (3) is communicated with the 3rd gas conduit (2), the 4th gas conduit (4) respectively, the internal diameter of the 3rd gas conduit (2) is equipped with second breather valve (1) less than the internal diameter of the 4th gas conduit (4) on the 4th gas conduit (4).
2. differential pressure measuring installation according to claim 1, it is characterized in that: it also comprises first overload protection arrangement (10) and second overload protection arrangement (11), the air intake opening of first overload protection arrangement (10) is communicated with first gas conduit (7), and the gas outlet of first overload protection arrangement (10) is communicated with second gas conduit (8); The air intake opening of second overload protection arrangement (11) is communicated with second gas conduit (8), and the gas outlet of second overload protection arrangement (11) is communicated with first gas conduit (7).
3. differential pressure measuring installation according to claim 2, it is characterized in that: described first overload protection arrangement (10) and/or second overload protection arrangement (11) comprise the gas cavity volume, described gas cavity volume is separated into first cavity volume (13) and second cavity volume (14) by elastic sheet (12), described elastic sheet (12) is penetrated with hollow stem (15), one end of described hollow stem (15) places in first cavity volume (13), the other end of described hollow stem (15) places in second cavity volume (14), the inner wall sealing of described first cavity volume (13) is fixed with elastic sealing elements (16), and place an end and the described elastic sealing elements (16) in first cavity volume (13) of described hollow stem (15) are complementary; Second cavity volume is equipped with elastic device in (14), and an end of this elastic device contacts with the inwall of second cavity volume (14), this elastic device the other end contact with elastic sheet (12); Described first cavity volume (13) is provided with air intake opening (20), and described second cavity volume (14) is provided with gas outlet (21).
4. overload protection arrangement, it is characterized in that: comprise the gas cavity volume, described gas cavity volume is separated into first cavity volume (13) and second cavity volume (14) by elastic sheet (12), described elastic sheet (12) is penetrated with hollow stem (15), one end of described hollow stem (15) places in first cavity volume (13), the other end of described hollow stem (15) places in second cavity volume (14), the inner wall sealing of described first cavity volume (13) is fixed with elastic sealing elements (16), and place an end and the described elastic sealing elements (16) in first cavity volume (13) of described hollow stem (15) are complementary; Second cavity volume is equipped with elastic device in (14), and an end of this elastic device contacts with the inwall of second cavity volume (14), this elastic device the other end contact with elastic sheet (12); Described first cavity volume (13) is provided with air intake opening (20), and described second cavity volume (14) is provided with gas outlet (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102952970A CN101957249B (en) | 2010-09-27 | 2010-09-27 | Differential pressure measurement device and overload protection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102952970A CN101957249B (en) | 2010-09-27 | 2010-09-27 | Differential pressure measurement device and overload protection device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101957249A true CN101957249A (en) | 2011-01-26 |
| CN101957249B CN101957249B (en) | 2012-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102952970A Expired - Fee Related CN101957249B (en) | 2010-09-27 | 2010-09-27 | Differential pressure measurement device and overload protection device thereof |
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| CN (1) | CN101957249B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454040A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Overpressure protective device for differential pressure transducer |
| CN103231774B (en) * | 2013-05-10 | 2015-09-23 | 沪东中华造船(集团)有限公司 | For buffer tube and the assembly method thereof of differential pressure transducer atmosphere inlet end |
| CN105092146A (en) * | 2015-05-06 | 2015-11-25 | 中国海洋大学 | Overvoltage protector for seabed pore pressure dynamic response sensing apparatus |
| CN105403354A (en) * | 2015-10-29 | 2016-03-16 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Vacuum pressure testing method based on differential pressure sensor |
| CN106979840A (en) * | 2017-02-23 | 2017-07-25 | 南京沃天科技有限公司 | Using Welding and with overload protection function differential pressure pick-up |
| CN107991016A (en) * | 2017-12-15 | 2018-05-04 | 芜湖致通汽车电子有限公司 | A kind of differential pressure pick-up structure |
| CN110926685A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Overload protection device of micro-differential pressure sensor and micro-differential pressure detection system |
| CN111380589A (en) * | 2020-03-28 | 2020-07-07 | 华中科技大学 | Liquid level measuring device and liquid level measuring method for pressure difference type gas storage |
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2010
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231774B (en) * | 2013-05-10 | 2015-09-23 | 沪东中华造船(集团)有限公司 | For buffer tube and the assembly method thereof of differential pressure transducer atmosphere inlet end |
| CN103454040A (en) * | 2013-09-11 | 2013-12-18 | 博益(天津)气动技术研究所有限公司 | Overpressure protective device for differential pressure transducer |
| CN105092146A (en) * | 2015-05-06 | 2015-11-25 | 中国海洋大学 | Overvoltage protector for seabed pore pressure dynamic response sensing apparatus |
| CN105092146B (en) * | 2015-05-06 | 2017-07-04 | 中国海洋大学 | Sea bed pore pressure dynamic response sensing equipment over-pressure safety device |
| CN105403354A (en) * | 2015-10-29 | 2016-03-16 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Vacuum pressure testing method based on differential pressure sensor |
| CN105403354B (en) * | 2015-10-29 | 2018-06-22 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | A kind of vacuum pressure test method based on differential pressure pick-up |
| CN106979840A (en) * | 2017-02-23 | 2017-07-25 | 南京沃天科技有限公司 | Using Welding and with overload protection function differential pressure pick-up |
| CN107991016A (en) * | 2017-12-15 | 2018-05-04 | 芜湖致通汽车电子有限公司 | A kind of differential pressure pick-up structure |
| CN110926685A (en) * | 2019-12-05 | 2020-03-27 | 中国航发四川燃气涡轮研究院 | Overload protection device of micro-differential pressure sensor and micro-differential pressure detection system |
| CN111380589A (en) * | 2020-03-28 | 2020-07-07 | 华中科技大学 | Liquid level measuring device and liquid level measuring method for pressure difference type gas storage |
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| Publication number | Publication date |
|---|---|
| CN101957249B (en) | 2012-03-07 |
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