CN101458140A - Differential pressure meter - Google Patents
Differential pressure meter Download PDFInfo
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- CN101458140A CN101458140A CNA2009100007160A CN200910000716A CN101458140A CN 101458140 A CN101458140 A CN 101458140A CN A2009100007160 A CNA2009100007160 A CN A2009100007160A CN 200910000716 A CN200910000716 A CN 200910000716A CN 101458140 A CN101458140 A CN 101458140A
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- sensing element
- differential pressure
- pressure gauge
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- deformation
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Abstract
The invention discloses a differential meter, comprising a sealed shell and a first cavity surrounded by the sealed shell, a sensing element in the first cavity and a second cavity surrounded by the sensing element, a connecting bar, a swing stem, a gear cluster, a spring and a pointer. The differential meter also comprises a deformation sensing device used for sensing the deformation of the sensing element, the deformation sensing device is connected with an external electric control system and can transmit electric signals to the system. The differential meter of the invention has two output ways of mechanical header display and electric signal output, thus being capable of feedbacking the pressure difference of a container and a device to be measured to the electric control system and facilitating industrial control; in addition, the meter has high measurement accuracy and long service life.
Description
Technical field
The present invention relates to a kind of device for pressure measurement, particularly relate to a kind of differential pressure gauge that is used for pressure differential control.
Background technology
In industries such as electrician, instrument and meter, often require the pressure differential of container, equipment is controlled, at this moment, usually can use differential pressure gauge.At present, when the preparation differential pressure gauge, the elastic sensing element in it mostly adopts Bourdon tube, corrugated tube and diaphragm.For bowden cast and bellows differential pressure gauge, in use the problem of Cun Zaiing is that static pressure is not high; And the complex structure of diaphragm-type differential pressure gauge, inside needs oil-filled and vacuumizes, thereby makes cost higher.In order to improve these deficiencies, it is the differential pressure gauge that has two pressure chambers and be provided with the elasticity pressure parts betwixt that a kind of technology of improving is arranged, as disclosed in the Chinese patent notification number CN201138265Y.This differential pressure gauge acts on the same flexible member two kinds of different pressure, thereby makes measuring accuracy be improved, and the twisting axle is to transmit displacement under the sealing situation simultaneously, is more suitable in high static pressure measurement.But, this differential pressure gauge only has mechanical gauge outfit and shows, can not carry out electric signal output, can't link to each other with automatic control system, can not control the external and internal pressure rate of change and the pressure extent of container, equipment thus effectively, therefore restrict the application of differential pressure gauge greatly.
Therefore, need develop a kind of existing high precision, again high static pressure be arranged, and have simultaneously that mechanical gauge outfit shows and electric signal is exported the novel differential pressure gauge of two kinds of way of outputs, to satisfy the needs of the pressure-measuring instrument that growing needs control automatically.
Summary of the invention
For overcoming above-mentioned defective, the purpose of this invention is to provide a kind of differential pressure gauge of novelty as described below, the pointer that this differential pressure gauge not only has mechanical gauge outfit shows to have electric signal output again, the pressure differential of tested container, equipment can be fed back to electric-control system.
For achieving the above object, the present invention realizes by the following technical solutions:
According to the invention provides a kind of differential pressure gauge, it comprises the closed shell that surrounds first chamber, and this first chamber has first pressure port that is in communication with the outside; Be arranged at the sensing element in first chamber, this sensing element has formed second chamber, and this second chamber has second pressure port that is in communication with the outside; Be used to transmit, amplify the distortion transmission and the amplifier module of the distortion of sensing element; Be used for the pointer that indicated pressure changes; And be used to spring that pointer is resetted, and wherein, this differential pressure gauge further comprises the deformation induction device of the distortion that is used to respond to sensing element, this deformation induction device is connected with outside electric-control system, can be to outside electric-control system transmission of electric signals.
In a preferred embodiment of the invention, deformation induction device is the pressure-strain sheet that is arranged on the sidewall of sensing element, and this pressure-strain sheet can produce alteration of form with the deformation of sensing element.
In another kind of preferred implementation according to the present invention, the element of pressure-strain sheet for from group as described below, choosing: semiconductor gauge, metal strain plate, ceramic foil gauge.
In another preferred implementation according to the present invention, deformation induction device is the Hall element that is installed between sensing element and the connecting rod, and this Hall element can detect the deformation of sensing element and produce electric signal.
In a preferred embodiment of the invention, deformation induction device is the potentiometer that is installed on the central gear, the resistance adjustment parts of this potentiometer are connected with central gear and can be driven and the generation motion by central gear, thereby make the resistance of potentiometer change.
In another kind of preferred implementation according to the present invention, sensing element is one and curves circular arc and terminal tapered pipe, its xsect ovalize, and oval-shaped short-axis direction is consistent with the radial direction of tube bending.
In another preferred implementation according to the present invention, distortion transmission and amplifier module comprise connecting rod, fork and gear set, and this gear set is fixed in the closed shell, is connected with an end of fork, its central gear is positioned at the central authorities of closed shell, on this central gear pointer is installed; The two ends of connecting rod respectively with the end of sensing element and fork hinge joint; One end of spring is connected with central gear, and the other end contacts with pointer.
Beneficial effect of the present invention is: this invention acts on the sensing element by making two kinds of different pressure, and measuring accuracy is improved, and its outside has closed shell to seal simultaneously, static pressure is improved, and prolonged the serviceable life of differential pressure gauge.This differential pressure gauge has mechanical gauge outfit demonstration and two kinds of way of outputs of electric signal output simultaneously, the external and internal pressure rate of change and the pressure extent of tested container, equipment can be fed back to electric-control system, helps carrying out Industry Control.
Description of drawings
Fig. 1 is the structural representation according to the differential pressure gauge of first preferred embodiment of the invention;
Fig. 2 is the structural representation according to the differential pressure gauge of second preferred embodiment of the invention; And
Fig. 3 is the structural representation according to the differential pressure gauge of third preferred embodiment of the invention.
Reference numeral:
1 closed shell; 2 first chambers; 3 sensing elements; 4 second chambers;
5 connecting rods; 6 forks; 7 gear sets; 8 central gears; 9 springs;
10 pointers; 12 first pressure port; 13 second pressure port
20 pressure sensitive devices; 201 pressure-strain sheets; 202 Hall elements; 203 potentiometers.
Embodiment
To be elaborated to preferred implementation of the present invention with reference to the accompanying drawings below.
Fig. 1 shows the structural representation of differential pressure gauge according to a first advantageous embodiment of the invention.In the present embodiment, differential pressure gauge comprises the closed shell 1 that surrounds first chamber 2, and this first chamber 2 has first pressure port 12 that is in communication with the outside; Be arranged at the sensing element 3 in first chamber 2, this sensing element 3 has formed second chamber 4, and this second chamber 4 has second pressure port 13 that is in communication with the outside; Be used for the distortion transmission of sensing element 3, distortion transmission and the amplifier module that amplifies; Be used for the pointer 10 that indicated pressure changes; And be used to spring 9 that pointer 10 is resetted.Two pressure port 12,13 are respectively applied for a test lead of tested container and are connected, and are not connected between first chamber 2 and second chamber 4, do not mix after the gas that guarantees tested container two test leads enters differential pressure gauge.
As shown in Figure 1, sensing element 3 is one and curves circular arc and terminal tapered pipe, its cross section ovalize, oval short-axis direction is consistent with the radial direction of tube bending, on its sidewall, further be provided with pressure-strain sheet 201, the preparation material of this pressure-strain sheet 201 is chosen from following group: semiconductor gauge, metal strain plate, ceramic foil gauge, it is connected with outside electric-control system, is used for to outside electric-control system transmission of electric signals.
In addition, the distortion transmission of above-mentioned differential pressure gauge and amplifier module comprise connecting rod 5, fork 6 and gear set 7, wherein, the two ends of connecting rod 5 respectively with the end of sensing element 3 and fork 6 hinge joints, when sensing element 3 produces distortion, promote connecting rod 5 motions, and then fork 6 is rotated, and the other end of fork 6 is connected with gear set 7; Gear set 7 is fixed in the closed shell 1, is connected with an end of fork 6, and its central gear 8 is positioned at the central authorities of closed shell 1, on this central gear 8 pointer 10 is installed, and gear set 7 is used for the trace of fork 6 is rotated amplification, and drives pointer 10 rotations; One end of spring 9 is connected with central gear, and the other end contacts with pointer 10, is used for automatically reseting of pointer 10.
When carrying out pressure test, at first first pressure port 12 and second pressure port 13 are connected with one of two test leads of test container respectively.When closed shell 1 was identical with air pressure in the sensing element 3, sensing element 3 did not produce distortion, and pointer 10 invariant positions are designated as zero.When the pressure in two chambers 2,4 is inequality, under the situation of pressure in closed shell 1 less than the pressure in the sensing element 3, sensing element 3 short-axis directions stressed bigger than long axis direction, pipe section has the trend that becomes circle, the end of sensing element 3 moves to the direction that pipe stretches, thereby drivening rod 5 motion, and then fork 6 is rotated and will move and amplify and drive pointer 10 clockwise rotates through gear set 7.Otherwise when the pressure in the closed shell 1 during greater than the pressure in the sensing element 3, pointer 10 will rotate counterclockwise.When sensing element 3 produced deformation, the pressure-strain sheet 201 that is arranged on its sidewall produced change of shape, and its resistivity also can change thereupon, therefore can export different electric signal to the external world, reaches the purpose of automatic control.When test stopped, the mechanical energy that spring 9 stores can make pointer 10 make zero.
Fig. 2 is the structural representation of differential pressure gauge according to a second, preferred embodiment of the present invention, and in the present embodiment, deformation induction device 20 is for being installed in the Hall element 202 between sensing element 3 and the connecting rod 5.In the present embodiment, the mode that Hall element 202 adopts hall device, magnetic material and the integrated encapsulation of translation circuit, it can be converted into displacement Hall voltage output.Its signal output part is connected with outside electric-control system, electric signal can be transferred to outside electric-control system.
When carrying out pressure test, at first first pressure port 12 and second pressure port 13 are connected with one of two test leads of test container respectively.When closed shell 1 was identical with air pressure in the sensing element 3, sensing element 3 did not produce distortion, and pointer 10 invariant positions are designated as zero.When the pressure in two chambers 2,4 is inequality, under the situation of pressure in closed shell 1 less than the pressure in the sensing element 3, sensing element 3 short-axis directions stressed bigger than long axis direction, pipe section has the trend that becomes circle, the end of sensing element 3 moves to the direction that pipe stretches, thereby drivening rod 5 motion, and then fork 6 is rotated and, pointer 10 is clockwise rotated through gear set 7 amplification of will moving.Otherwise when the pressure in the closed shell 1 during greater than the pressure in the sensing element 3, pointer 10 will rotate counterclockwise.When sensing element 3 produces deformation, coupled Hall element 202 produces displacement thereupon, and the translation circuit in it is converted into electric signal with displacement, and its signal output part is connected with outside electric-control system, electric signal can be transferred to outside electric-control system, reach the purpose of automatic control.When test stopped, the mechanical energy that spring 11 stores can make pointer 10 make zero.
Fig. 3 is the structural representation according to the differential pressure gauge of the 3rd preferred embodiment of the present invention, in the present embodiment, deformation induction device 20 is a potentiometer 203, this potentiometer 203 is installed on the central gear 8, its resistance adjustment parts are connected with central gear 8, can be driven and be produced by central gear 8 to move, thereby the resistance of potentiometer 203 is changed, the output terminal of this potentiometer 203 is connected with outside electric-control system, can be to outside electric-control system transmission of electric signals.
When carrying out pressure test, at first first pressure port 12 and second pressure port 13 are connected with one of two test leads of test container respectively.When closed shell 1 was identical with air pressure in the sensing element 3, sensing element 3 did not produce distortion, and pointer 10 invariant positions are designated as zero.When the pressure in two chambers 2,4 is inequality, under the situation of pressure in closed shell 1 less than the pressure in the sensing element 3, sensing element 3 short-axis directions stressed bigger than long axis direction, pipe section has the trend that becomes circle, the end of sensing element 3 moves to the direction that pipe stretches, thereby drivening rod 5 motion, and then fork 6 is rotated and through gear set 7 amplification of will move, central gear 8 drive pointers 10 clockwise rotate.Otherwise when the pressure in the closed shell 1 during greater than the pressure in the sensing element 3, pointer 10 will rotate counterclockwise.Along with the rotation of central gear 8, the resistance adjustment parts of coupled potentiometer 203 produce motion under the drive of central gear 8, the resistance of potentiometer 203 is changed, thereby the electric signal of output is changed.The output terminal of this potentiometer 203 is connected with outside electric-control system, can reach the purpose of automatic control to outside electric-control system transmission of electric signals.When test stopped, the mechanical energy that spring 9 stores can make pointer 10 make zero.
In the present invention, sensing element 3 is to adopt copper to form fully, but also can be embodied as the other materials that has certain thickness and deformation can take place under pressure, for example: stainless steel, copper-nickel alloy, nylon, organic polymer, carbon fiber.
More than disclosed only be the preferred embodiments of the present invention, can not limit the scope of the present invention with this certainly.Be appreciated that the equivalent variations of doing according to the present invention's essence defined in the appended claims and scope, still belong to the scope that the present invention is contained.
Claims (7)
1. differential pressure gauge, comprising: surround the closed shell (1) of first chamber (2), described first chamber (2) has first pressure port (12) that is in communication with the outside; Be arranged at the sensing element (3) in first chamber (2), this sensing element (3) has formed second chamber (4), and described second chamber (4) has second pressure port (13) that is in communication with the outside; Be used for transmission, amplify the distortion transmission and the amplifier module of the distortion of sensing element (3); Be used for the pointer (10) that indicated pressure changes; And be used to spring (9) that pointer (10) is resetted, it is characterized in that, described differential pressure gauge further comprises the deformation induction device (20) of the distortion that is used to respond to sensing element (3), described deformation induction device (20) is connected with outside electric-control system, can be to outside electric-control system transmission of electric signals.
2. differential pressure gauge as claimed in claim 1, it is characterized in that, described deformation induction device (20) is the pressure-strain sheet (201) on the sidewall that is arranged on described sensing element (3), and described pressure-strain sheet (201) can produce alteration of form with the deformation of sensing element (3).
3. differential pressure gauge as claimed in claim 2 is characterized in that, the element of described pressure-strain sheet (201) for choosing from group as described below: semiconductor gauge, metal strain plate, ceramic foil gauge.
4. differential pressure gauge as claimed in claim 1, it is characterized in that, described deformation induction device (20) is for being installed in the Hall element (202) between sensing element (3) and the connecting rod (5), and described Hall element (202) can detect the deformation of sensing element (3) and produce electric signal.
5. differential pressure gauge as claimed in claim 1, it is characterized in that, described deformation induction device (20) is for being installed in the potentiometer (203) on the central gear (8), the resistance adjustment parts of described potentiometer (203) are connected with central gear (8) and can be driven and the generation motion by central gear (8), thereby make the resistance of potentiometer (203) change.
6. differential pressure gauge as claimed in claim 1 is characterized in that, described sensing element (3) is one and curves circular arc and terminal tapered pipe, its xsect ovalize, and oval-shaped short-axis direction is consistent with the radial direction of tube bending.
7. differential pressure gauge as claimed in claim 1, it is characterized in that, described distortion transmission and amplifier module comprise connecting rod (5), fork (6) and gear set (7), described gear set (7) is fixed in the described closed shell (1), be connected with an end of described fork (6), its central gear (8) is positioned at the central authorities of closed shell (1), and pointer (10) is installed on this central gear (8); The two ends of described connecting rod (5) respectively with the end of sensing element (3) and fork (6) hinge joint; One end of described spring (9) is connected with central gear (13), and the other end contacts with pointer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100007160A CN101458140A (en) | 2009-01-08 | 2009-01-08 | Differential pressure meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100007160A CN101458140A (en) | 2009-01-08 | 2009-01-08 | Differential pressure meter |
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| CN101458140A true CN101458140A (en) | 2009-06-17 |
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| CNA2009100007160A Pending CN101458140A (en) | 2009-01-08 | 2009-01-08 | Differential pressure meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017137013A1 (en) * | 2016-02-14 | 2017-08-17 | 北京艾派可科技有限公司 | Relative pressure gas energy storage device and inspection method therefor, storage system and balance detection mechanism |
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2009
- 2009-01-08 CN CNA2009100007160A patent/CN101458140A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017137013A1 (en) * | 2016-02-14 | 2017-08-17 | 北京艾派可科技有限公司 | Relative pressure gas energy storage device and inspection method therefor, storage system and balance detection mechanism |
| CN108779674A (en) * | 2016-02-14 | 2018-11-09 | 北京艾派可科技有限公司 | It can storage facility and detection method, storage system, balance detecting mechanism to calming the anger |
| US10883367B2 (en) | 2016-02-14 | 2021-01-05 | Weilun Chen | Paired air pressure energy storage device, inspection method and balance detection mechanism thereof |
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Open date: 20090617 |