CN204988608U - A piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in - Google Patents
A piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in Download PDFInfo
- Publication number
- CN204988608U CN204988608U CN201520495196.6U CN201520495196U CN204988608U CN 204988608 U CN204988608 U CN 204988608U CN 201520495196 U CN201520495196 U CN 201520495196U CN 204988608 U CN204988608 U CN 204988608U
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- piston
- differential pressure
- damping formula
- optical fiber
- pressure sensor
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Abstract
The utility model provides a piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in, including the piston only, the piston only is the cylinder structure, has seted up the oil ring groove along the circumferencial direction on the lateral wall of piston only, and the oil storage tank has been seted up to the inside of piston only, still is provided with the oilhole of intercommunication oil ring groove and oil storage tank on the piston only, and the intermediate position of piston only both ends face is fixed respectively and is provided with a reflection of light piece. With single piston damping formula light differential pressure sensor of design of cooperation, two kinds of fluid pressure that guarantee to survey not not simultaneously, the removal can take place for the piston only sensitively, assurance sensor probe's sensitivity and precision to satisfy actual differential pressure and measure the requirement. The utility model belongs to pressure differential detection area.
Description
Technical field
The utility model relates to a kind of piston for sensor probe, belongs to technical field of optical fiber sensing.
Background technology
Differential pressure pick-up is widely used in industry, is mainly used in measuring equipment, parts or the fluid pressure differential at diverse location, and it is widely used in the detection fields such as tail gas pressure reduction, gas flow, height of liquid level, clean room monitoring.Now, there is the differential pressure pick-up adopting different principle, such as resistance-type, condenser type, inductance type, flow controller formula, magnetic liquid formula, MEMS formula etc., wherein resistance-type, condenser type is comparatively common, all the other types due to practicality not strong, limitation is in the concept phase more greatly or still, be not promoted, but resistance-type, also there is self shortcoming in capacitance differential pressure transducer, can not well be competent in a lot of occasion, devise a kind of novel fibre bundle differential pressure pick-up with single damping spring for this reason, but the requirement of this sensor to piston is higher, design difficulty is large.
Utility model content
The purpose of this utility model is: provide a kind of piston for single piston damping formula optical fiber differential pressure pickup probe, to coordinate designed single piston damping formula light difference pressure sensor, when ensureing the two kinds of hydrodynamic pressures differences detected, piston only can be moved delicately, ensure sensitivity and the precision of sensor probe, measure requirement to meet actual pressure differential.
Scheme of the present utility model is as follows: a kind of piston for single piston damping formula optical fiber differential pressure pickup probe, comprise piston only, piston only is cylindrical structure, the sidewall of piston only along the circumferential direction offers oil ring groove, the inside of piston only offers oil storage tank, piston only is also provided with the oilhole being communicated with oil ring groove and oil storage tank, the centre position of piston only both ends of the surface is fixedly installed a reflecting piece respectively.
Preferably, the sidewall at piston only two ends is respectively arranged with an oil ring groove, ensures that piston only can obtain sufficient lubrication, reduce frictional resistance, make it sensitiveer to pressure sensitive;
Preferably, the sidewall of piston only along the circumferential direction also offers compression;
Preferably, piston only is aluminum alloy material, and material is comparatively light, is convenient to slide;
Preferably, the sidewall of piston only along the circumferential direction also offers closure gasket groove, in closure gasket groove, is provided with sealing ring, ensure the complete sealed separation in two ends of piston only;
Preferably, piston only is provided with two seals annular groove, in two seals annular groove, is respectively arranged with a sealing ring.
Described single piston damping formula optical fiber differential pressure pickup probe, comprise the housing of tubular construction, slide in housing and be provided with above-mentioned piston, the two ends of piston are respectively arranged with a spring, one end of two springs is all fixed on piston, end cap totally two, be individually fixed in the two ends of housing, the other end of two springs is individually fixed on corresponding end cap, the sidewall at housing two ends just offers fluid through-hole to the position of the structural through hole of end cap, treats that fluid measured enters probe bore by the order of fluid through-hole → through hole → housing cavity.
The fibre bundle of fibre-optical probe is formed by incident optical and reception optical fiber set armouring, the incident optical other end docks with light source, in order to the incident light that is coupled, receive fiber exit end to be connected with light activated element, output light intensity signal, when piston pressure at both sides difference makes piston produce displacement and then make fibre bundle and reflecting piece distance change, cause the intensity of two output optical signals different, light activated element is converted into electric signal light signal, this signal is input in computing machine after the processing links such as amplification, rectification and filtering, corresponding algorithm is coordinated to calculate, the fluid pressure differential of two detection positions can be drawn.
The principle of work of this sensor probe is: pass into two kinds respectively by two fluid through-holes and treat fluid measured, when the hydrodynamic pressure in the test chamber of the left and right sides is equal, piston is in equilibrium position, middle part, and the axis on piston makes a concerted effort to be zero, and piston does not produce axial displacement; When there is pressure differential in the fluid in the test chamber of the piston left and right sides, piston out of trim, to the Slideslip that pressure is lower, thus compress this side damping spring, opposite side damping spring is stretched, piston movement make a concerted effort to a new axis be zero equilibrium position.When piston is in equilibrium position, middle part, the mutually isostructural fibre bundle in sensor both sides and piston end surface reflecting piece apart from equal, thus the output optical signal intensity that two fibre bundles receive optical fiber is equal, and after opto-electronic conversion and signal transacting calculating, output valve is 1; Piston is after low pressure one Slideslip, low-pressure side fibre bundle and piston end surface reflecting piece distance reduce, receive the output optical signal remitted its fury of optical fiber, and high-pressure side fibre bundle and piston end surface reflecting piece distance increase, receive the output optical signal strength-enhanced of optical fiber, after opto-electronic conversion and signal transacting calculate, output valve will change at double, thus improve detection sensitivity.By the change of final output valve size, the pressure differential size between sensor two test chamber inner fluid can be judged, realize the detection to diverse location pressure differential.
The utility model compared with prior art, major advantage is optimized the piston structure of sensor probe, ensure the sealed separation between the chamber of piston two ends, reduce the friction force of piston as far as possible, when ensureing the two kinds of hydrodynamic pressures differences detected, piston only can be moved delicately, ensure the accuracy measured, ensure that sensor has higher degree of accuracy and reliability, the preferably advantage such as adaptability and interchangeability, ensure that detection sensitivity, with popularization, positive impetus is served to the design of novel differential pressure sensor.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the utility model when being installed on sensor probe;
Fig. 2 is the main TV structure schematic diagram of piston only;
Fig. 3 is the right view of Fig. 2;
Wherein, Reference numeral 101 represents housing, and 102 represent end cap, and 103 represent spring, and 104 represent fibre-optical probe, and 105 represent fluid through-hole.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below with reference to accompanying drawings the utility model is described in further detail,
Embodiment:
With reference to Fig. 1, Fig. 2 and Fig. 3, the present embodiment provides a kind of piston for single piston damping formula optical fiber differential pressure pickup probe, comprise the piston only 1 of aluminum alloy material, piston only 1 is right cylinder structure, the sidewall at piston only 1 two ends along the circumferential direction offers an oil ring groove 2 respectively, the inside of piston only 1 offers oil storage tank 3, piston only 1 is also provided with the oilhole 4 being communicated with oil ring groove 2 and oil storage tank 3, the centre position of piston only 1 both ends of the surface is fixedly installed a reflecting piece 5 respectively, the sidewall of piston only 1 along the circumferential direction also offers compression 6, the sidewall of piston only 1 along the circumferential direction also offers two ends closure gasket groove 7, a sealing ring 8 is respectively arranged with in two seals annular groove 7, the external diameter of sealing ring 8 is slightly larger than the external diameter of piston only 1, during to ensure that piston only 1 is arranged in the housing of sensor probe, because piston only 1 and inner walls match, sealing ring 8 is pressed in closure gasket groove 7, ensure the complete sealed separation in piston only 1 two ends.
Claims (6)
1. the piston for single piston damping formula optical fiber differential pressure pickup probe, comprise piston only (1), piston only (1) is cylindrical structure, the sidewall of piston only (1) along the circumferential direction offers oil ring groove (2), the inside of piston only (1) offers oil storage tank (3), piston only (1) is also provided with the oilhole (4) being communicated with oil ring groove (2) and oil storage tank (3), the centre position of piston only (1) both ends of the surface is fixedly installed a reflecting piece (5) respectively.
2. a kind of piston for single piston damping formula optical fiber differential pressure pickup probe according to claim 1, is characterized in that: the sidewall at piston only (1) two ends is respectively arranged with an oil ring groove (2).
3. a kind of piston for single piston damping formula optical fiber differential pressure pickup probe according to claim 1, is characterized in that: the sidewall of described piston only (1) along the circumferential direction also offers compression (6).
4. a kind of piston for single piston damping formula optical fiber differential pressure pickup probe according to claim 1, is characterized in that: described piston only (1) is aluminum alloy material.
5. a kind of piston for single piston damping formula optical fiber differential pressure pickup probe according to claim 1, it is characterized in that: the sidewall of described piston only (1) along the circumferential direction also offers closure gasket groove (7), in closure gasket groove (7), be provided with sealing ring (8).
6. a kind of piston for single piston damping formula optical fiber differential pressure pickup probe according to claim 1, it is characterized in that: piston only (1) is provided with two seals annular groove (6), in two seals annular groove (6), be respectively arranged with a sealing ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520495196.6U CN204988608U (en) | 2015-07-10 | 2015-07-10 | A piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520495196.6U CN204988608U (en) | 2015-07-10 | 2015-07-10 | A piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204988608U true CN204988608U (en) | 2016-01-20 |
Family
ID=55122966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520495196.6U Expired - Fee Related CN204988608U (en) | 2015-07-10 | 2015-07-10 | A piston that is used for single piston damping formula optic fibre differential pressure sensor to pop one's head in |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204988608U (en) |
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2015
- 2015-07-10 CN CN201520495196.6U patent/CN204988608U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160120 Termination date: 20210710 |