CN104198069A - Thermocouple for air compressor - Google Patents
Thermocouple for air compressor Download PDFInfo
- Publication number
- CN104198069A CN104198069A CN201410424868.4A CN201410424868A CN104198069A CN 104198069 A CN104198069 A CN 104198069A CN 201410424868 A CN201410424868 A CN 201410424868A CN 104198069 A CN104198069 A CN 104198069A
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- oversheath
- pressure transducer
- pressure
- control module
- air
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Abstract
The invention provides a thermocouple for an air compressor. The thermocouple comprises an thermocouple wire, an inner sheath, an outer sheath, a first pressure sensor, a second pressure sensor, an air pump, an air feeding pipe and a control module, wherein the thermocouple wire is sleeved with the inner sheath that is sleeved with the outer sheath, a vent is formed on the outer sheath, the first pressure sensor is installed on the outer side of the outer sheath for monitoring pressure outside the outer sheath, the second pressure sensor is installed between the outer sheath and the inner sheath for monitoring pressure between the outer sheath and the inner sheath, the first end of the air feeding pipe communicates with the air pump while the second end of the air feeding pipe is connected to the vent on the outer sheath, the control module is connected to the first and second pressure sensors and the air pump respectively, and controls operation of the air pump according to the sensing signals of the first and second pressure sensors. According to the thermocouple for the air compressor, the problem that protection effect of the thermocouple wire is reduced due to that the thermocouple wire sheaths deform under pressure is overcome.
Description
Technical field
The present invention relates to temperature detection technical field, relate in particular to a kind of used for air compressor thermopair.
Background technology
Temperature is a basic physical quantity, all processes of occurring in nature are invariably closely related with temperature, as the device that temperature is measured, temperature measuring instrument can convert temperature information to usable output signal, and temperature measuring instrument has a wide range of applications and the huge market share.
Used for air compressor temperature measuring instrument, due to the singularity of environment for use, need to have good explosion-proof performance.In order to make the explosion-proof performance of used for air compressor temperature measuring instrument meet the related request of national standard, in design, structure is too complicated, has also improved in addition manufacturing cost.
Thermopair as in temperature measuring instrument for the element of direct temperature measurement, can directly temperature signal be converted to electric signal, be conducive to temperature measuring instrument to simplify the structure, and during thermocouple temperature measurement, only galvanic couple silk need to be placed into temperature measuring positions, avoid the requirement of explosion proof of air compressor machine to temperature measuring instrument.But, the expansion that easily deforms in the situation that air compressor machine pressure change is large of the restrictive coating of galvanic couple silk, thus cause sheath gap to increase, and air is through sheath corrosion galvanic couple silk, the stable and serviceable life of reducing galvanic couple silk serviceability.
Summary of the invention
The technical matters existing based on background technology, the present invention proposes a kind of used for air compressor thermopair, has solved galvanic couple silk sheath and under pressure action, has been out of shape the problem causing the reduction of galvanic couple silk protection effect.
A kind of used for air compressor thermopair that the present invention proposes, comprising: galvanic couple silk, inner sheath, oversheath, the first pressure transducer, the second pressure transducer, air pump, air duct and control module;
Inner sheath is enclosed within galvanic couple silk periphery, and oversheath is enclosed within inner sheath periphery, is provided with blow vent on oversheath; The first pressure transducer is arranged on oversheath outside for monitoring the pressure in oversheath outside, the second pressure transducer is arranged between oversheath and inner sheath for monitoring the pressure between oversheath and inner sheath, air duct first end is communicated with air pump, and air duct the second end connects the blow vent on oversheath;
Control module connects respectively the first pressure transducer, the second pressure transducer and air pump, and controls air pump work according to the transducing signal of the first pressure transducer and the second pressure transducer.
Preferably, in control module, be preset with margin threshold value, when the pressure detecting when the first pressure transducer is less than or equal to the difference of pressure that the second pressure transducer detects and margin threshold value, controls air pump and extract the gas between inner sheath and oversheath by air duct.
Preferably, also comprise comparer, control module connects respectively the first pressure transducer and the second pressure transducer by comparer, the first pressure transducer and the second pressure transducer send to comparer by pressure sensor signal respectively, comparer compares both, and result is sent to control module.
Preferably, be provided with the adjustable solenoid valve of aperture on air duct, control module connected electromagnetic valve is also controlled its work.
Preferably, control module is according to oversheath inner side and outside pressure difference Changing Pattern, controls air pump with electromagnetic valve work and control solenoid valve aperture to make oversheath inner side consistent with outside pressure change speed.
Used for air compressor thermopair provided by the invention, air pump can be bled by air duct between oversheath and inner sheath, with the pressure of avoiding the pressure in oversheath outside to be less than inner side, cause the expansion of interior oversheath, increase sheath molecular gap, thereby cause air voltaic couple silk to cause galvanic couple silk to be corroded.
In used for air compressor thermopair provided by the invention, it is strong and regulate that control module is monitored inside and outside oversheath side pressure in real time by the first pressure transducer and the second pressure transducer, real-time, precision is high, with side pressure change inside and outside guaranteeing oversheath, keep equilibrium state, stop oversheath deformation chance.
Used for air compressor thermopair provided by the invention, does not fear the risk of air compressor machine when work thermopair working position sudden change of pressure surface, has increased thermopair serviceable life, and has guaranteed the reliable and stable of its work.
Accompanying drawing explanation
Fig. 1 is a kind of used for air compressor thermocouple structure schematic diagram that the present invention proposes;
Fig. 2 is a kind of used for air compressor thermopair control structure schematic diagram that the present invention proposes.
Embodiment
With reference to Fig. 1, a kind of used for air compressor thermopair that the present invention proposes, comprising: galvanic couple silk 1, inner sheath 2, oversheath 3, the first pressure transducer 4, the second pressure transducer 5, air pump 6, air duct 7 and control module 8.
Inner sheath 2 is enclosed within galvanic couple silk 1 periphery and directly protects galvanic couple silk 1 to avoid the infringement of external cause.Oversheath 3 is enclosed within inner sheath 2 peripheries for galvanic couple silk 1 provides many one heavy guarantee, also to inner sheath, provides protection simultaneously, avoids its distortion and affects the protection effect to galvanic couple silk 1.
On oversheath 3, be provided with blow vent 301, air duct 7 first ends are communicated with air pump 6, air duct 7 second ends connect the blow vent 301 on oversheath 3, air pump 6 can be bled by air duct 7 between oversheath 3 and inner sheath 2, with the pressure of avoiding the pressure in oversheath 3 outsides to be less than inner side, cause the expansion of interior oversheath, increase sheath molecular gap, thereby cause air voltaic couple silk 1 to cause galvanic couple silk 1 to be corroded.
The first pressure transducer 4 is arranged on oversheath 3 outsides for monitoring the pressure in oversheath 3 outsides, and the second pressure transducer 5 is arranged between oversheath 3 and inner sheath 2 for monitoring the pressure between oversheath 3 and inner sheath 2.
Control module 8 connects respectively the first pressure transducer 4, the second pressure transducer 5 and air pump 6, and controls air pump work according to the transducing signal of the first pressure transducer 4 and the second pressure transducer 5.
In present embodiment, control module 8 specific works modes are: in control module 8, be preset with margin threshold value; when the pressure detecting when the first pressure transducer 4 is less than or equal to the difference of pressure that the second pressure transducer 5 detects and margin threshold value; control module 8 is controlled the gas that air pump 6 extracts between inner sheath 2 and oversheath 3 by air duct 7; reduce the pressure difference of oversheath 3 outsides and inner side, thereby avoid oversheath 3 dilatational strain impacts to the protecting and limiting of inner sheath 2 and cause galvanic couple silk 1 to suffer damage.
In present embodiment, control module 8 is monitored in real time the inside and outside side pressure of oversheath 3 by force and is regulated by the first pressure transducer 4 and the second pressure transducer 5, and real-time, precision is high.
The used for air compressor thermopair providing in present embodiment, also comprises comparer 9, and control module 8 connects respectively the first pressure transducer 4 and the second pressure transducer 5 by comparer 9.The first pressure transducer 4 and the second pressure transducer 5 send to pressure sensor signal respectively comparer 9, and comparer 9 compares both, and result is sent to control module 8.Control module 8 directly obtains the pressure difference in oversheath 3 inner sides and outside by comparer 9, and controls air pump 6 work, has saved computing time, has improved oversheath 3 inner side pressure governing speeds.
The used for air compressor thermopair providing in present embodiment, is provided with the adjustable solenoid valve 10 of aperture on air duct 7, control module 8 connected electromagnetic valves 10 are also controlled its work.
The concrete mode of controlling solenoid valve 10 work of control module 8 is: control module 8 is according to oversheath 3 inner sides and outside pressure difference Changing Pattern, and control air pump 6 is worked with solenoid valve 10 and controlled solenoid valve 10 apertures and makes oversheath 3 inner sides consistent with outside pressure change speed.For example, when oversheath 3 outside pressure continue to reduce, gas loss speed in control module 8 deducibility oversheath 3 outside unit volumes, thereby control the aperture that solenoid valve 10 is opened, regulate in oversheath 3 inner side unit volumes gas loss speed and with outside unit volume in gas loss speed be consistent, to guarantee that the inside and outside side pressure change of oversheath 3 keeps equilibrium state, stops oversheath 3 deformation chances.
The used for air compressor thermopair providing in present embodiment; can regulate in real time oversheath 3 inner side pressure; guarantee the inside and outside side pressure equilibrium of oversheath 3; avoid oversheath 3 that deformation occurs; thereby for inner sheath 2 provides reliable and stable protection; and indirect protection galvanic couple silk, thereby avoid inner sheath 2 to increase air penetration inner sheath 2 corrosion galvanic couple silks along with oversheath 3 distortion cause sheath gap.
The used for air compressor thermopair providing in present embodiment, does not fear the risk of air compressor machine when work thermopair working position sudden change of pressure surface, has increased thermopair serviceable life, and has guaranteed the reliable and stable of its work.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (5)
1. a used for air compressor thermopair, it is characterized in that, comprising: galvanic couple silk (1), inner sheath (2), oversheath (3), the first pressure transducer (4), the second pressure transducer (5), air pump (6), air duct (7) and control module (8);
Inner sheath (2) is enclosed within galvanic couple silk (1) periphery, and oversheath (3) is enclosed within inner sheath (2) periphery, is provided with blow vent (301) on oversheath (3); The first pressure transducer (4) is arranged on the pressure that oversheath (3) outside is used for monitoring oversheath (3) outside, the second pressure transducer (5) is arranged between oversheath (3) and inner sheath (2) for monitoring the pressure between oversheath (3) and inner sheath (2), air duct (7) first end is communicated with air pump (6), and air duct (7) second ends connect the blow vent (301) on oversheath (3);
Control module (8) connects respectively the first pressure transducer (4), the second pressure transducer (5) and air pump (6), and controls air pump work according to the transducing signal of the first pressure transducer (4) and the second pressure transducer (5).
2. used for air compressor thermopair as claimed in claim 1, it is characterized in that, control module is preset with margin threshold value in (8), when the pressure detecting when the first pressure transducer (4) is less than or equal to the difference of pressure that the second pressure transducer (5) detects and margin threshold value, controls air pump (6) and extract the gas between inner sheath (2) and oversheath (3) by air duct (7).
3. used for air compressor thermopair as claimed in claim 1, it is characterized in that, also comprise comparer (9), control module (8) connects respectively the first pressure transducer (4) and the second pressure transducer (5) by comparer (9), the first pressure transducer (4) and the second pressure transducer (5) send to pressure sensor signal respectively comparer (9), comparer (9) compares both, and result is sent to control module (8).
4. the used for air compressor thermopair as described in claim 1 or 2 or 3, is characterized in that, is provided with the adjustable solenoid valve of aperture (10) on air duct (7), and control module (8) connected electromagnetic valve (10) is also controlled its work.
5. used for air compressor thermopair as claimed in claim 4, it is characterized in that, control module (8) is according to oversheath (3) inner side and outside pressure difference Changing Pattern, and control air pump (6) is worked with solenoid valve (10) and controlled solenoid valve (10) aperture and makes oversheath (3) inner side consistent with outside pressure change speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424868.4A CN104198069A (en) | 2014-08-26 | 2014-08-26 | Thermocouple for air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424868.4A CN104198069A (en) | 2014-08-26 | 2014-08-26 | Thermocouple for air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104198069A true CN104198069A (en) | 2014-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410424868.4A Pending CN104198069A (en) | 2014-08-26 | 2014-08-26 | Thermocouple for air compressor |
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| CN (1) | CN104198069A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2360874B1 (en) * | 1976-08-05 | 1982-04-23 | Qualitrol Corp | |
| CN101750165A (en) * | 2010-01-08 | 2010-06-23 | 浙江伦特机电有限公司 | Blowing thermocouple |
| CN202748143U (en) * | 2012-06-08 | 2013-02-20 | 张殿武 | Thermocouple with thickened inner sheath |
| CN102980675A (en) * | 2012-11-28 | 2013-03-20 | 安徽埃克森科技集团有限公司 | Suction thermocouple |
| CN102980674A (en) * | 2012-11-28 | 2013-03-20 | 安徽埃克森科技集团有限公司 | Intelligent protection method of thermocouple |
| CN102998019A (en) * | 2012-11-28 | 2013-03-27 | 安徽埃克森科技集团有限公司 | Mixed gas suction type thermocouple |
| CN103017925A (en) * | 2012-11-28 | 2013-04-03 | 安徽埃克森科技集团有限公司 | Intelligent pressure testing type thermoelectric couple |
| CN103626381A (en) * | 2012-08-27 | 2014-03-12 | 浙江富通光纤技术有限公司 | Graphite furnace for sintering glass loose mass |
-
2014
- 2014-08-26 CN CN201410424868.4A patent/CN104198069A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2360874B1 (en) * | 1976-08-05 | 1982-04-23 | Qualitrol Corp | |
| CN101750165A (en) * | 2010-01-08 | 2010-06-23 | 浙江伦特机电有限公司 | Blowing thermocouple |
| CN202748143U (en) * | 2012-06-08 | 2013-02-20 | 张殿武 | Thermocouple with thickened inner sheath |
| CN103626381A (en) * | 2012-08-27 | 2014-03-12 | 浙江富通光纤技术有限公司 | Graphite furnace for sintering glass loose mass |
| CN102980675A (en) * | 2012-11-28 | 2013-03-20 | 安徽埃克森科技集团有限公司 | Suction thermocouple |
| CN102980674A (en) * | 2012-11-28 | 2013-03-20 | 安徽埃克森科技集团有限公司 | Intelligent protection method of thermocouple |
| CN102998019A (en) * | 2012-11-28 | 2013-03-27 | 安徽埃克森科技集团有限公司 | Mixed gas suction type thermocouple |
| CN103017925A (en) * | 2012-11-28 | 2013-04-03 | 安徽埃克森科技集团有限公司 | Intelligent pressure testing type thermoelectric couple |
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Application publication date: 20141210 |