CN102519524A - Fluid sensor and method for detecting flow state of fluid by using same - Google Patents
Fluid sensor and method for detecting flow state of fluid by using same Download PDFInfo
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- CN102519524A CN102519524A CN2011103747075A CN201110374707A CN102519524A CN 102519524 A CN102519524 A CN 102519524A CN 2011103747075 A CN2011103747075 A CN 2011103747075A CN 201110374707 A CN201110374707 A CN 201110374707A CN 102519524 A CN102519524 A CN 102519524A
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- fluid
- valve seat
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- relief valve
- overflow
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Abstract
The invention discloses a fluid sensor, which comprise a shell, an overflow valve, a magnet, a limit bolt, a return spring and a Hall sensor, wherein a runner is arranged inside the shell and comprises a first cavity and a second cavity with a larger cross section which are communicated with each other, and the overflow valve comprises an overflow valve core, an overflow valve seat and an overflow spring; the overflow valve core is contacted with the overflow valve seat, and the overflow spring is fixedly arranged between the overflow valve core and the overflow valve seat; the cross section of a part of the overflow valve core is larger than that of the first cavity and smaller than that of the second cavity, and the part clings to the first cavity; the other part of the overflow valve core penetrates through the overflow valve seat and protrudes out of the magnet, and is closer to the limit bolt than the magnet, and the magnet is fixed in the second cavity in a sliding way and clings to the overflow valve; the limit bolt is arranged at one end of the shell with a fluid outlet, and the return spring is fixedly arranged between the magnet and the limit bolt; and the Hall sensor is arranged in a groove in the side surface of the shell. The fluid sensor can be suitable for any fluid including a liquid with slow rate and high viscosity, and can adapt to the frequent flow and static switching, and signals can be output reliably.
Description
Technical field
The present invention relates to the fluid sensor that a kind of flow state of convection cell detects.
Background technology
Fluid sensor requires the form output with electric signal of the flow state of fluid or stationary state, thereby can know this signal through the instrument inspection, and shows through instrument, with the purpose that reaches automatic detection or report to the police automatically when the fault.
In the fluid detection field, lack simple in structure at present and the sensor of the flow state of test fluid effectively.
Traditional flowmeter is used to measure the flow of fluid, although can be used for the flow state of test fluid, obvious defects is arranged.One of which, owing to usually adopt rotatable parts such as impeller as detection means, the reliable measurement property of the fluid slow for flow velocity, that viscosity is high (for example grease in the lubricating system) will reduce greatly; Its two, this type of sensor bulk is huger, for the application scenario of small space, and is not suitable for; Its three, manufacturing accuracy requires high, causes cost higher, is not suitable for application low-costly and in high volume.
Other has some fluid sensors to adopt plunger type testing agency, has improved detection sensitivity to a certain extent, but in application, also exists some problems.Such as there being passive reset structure (lean on gap overflow or lean on aperture overflow), the fluid slow for flow velocity, that viscosity is big can't reliable detection, thereby problems such as testing result is unreliable occur.In addition, for adapting to narrow and small working environment, also need the volume of strict control device.
Summary of the invention
Technical matters to be solved by this invention provides a kind of fluid sensor, goes for any fluid (comprising the fluid that flow velocity is slow, viscosity is high), and can adapt to frequent flowing and static switching, and signal output is reliable.For this reason, the present invention also will provide the method for the flow state of said fluid sensor test fluid.
For solving the problems of the technologies described above, fluid sensor of the present invention comprises:
Housing, its side has a groove; The one of which end has fluid intake; Its other end has fluid egress point; Has the runner that connects fluid intake and fluid egress point in enclosure interior; Said runner comprises first cavity and second cavity of connection, and the latter's sectional area is bigger;
Surplus valve is fixed in second cavity slidably, comprises overflow spool, relief valve seat and is fixed on overflow spring between the two; Said overflow spool and relief valve seat contact; The sectional area of the part of said overflow spool is greater than first cavity and less than second cavity, and this part of overflow spool is close to first cavity; Another part of said overflow spool passes relief valve seat and gives prominence to outside magnet, this part than magnet more near caging bolt;
Magnet is fixed in second cavity slidably, and is close to surplus valve;
Caging bolt is arranged on that end that housing has fluid egress point;
Back-moving spring is fixed between magnet and the caging bolt;
Hall element is arranged in the groove of side.
The method of the flow state of said fluid sensor test fluid is:
Under the original state, the part of overflow spool is close to first cavity, and relief valve seat contacts with the overflow spool, and magnet contacts with relief valve seat;
Get into runner as fluid from fluid intake, the pressure extrusion of fluid the overflow valve core movement, and the overflow spool is pushing the relief valve seat motion again, and relief valve seat is pushing magnet movement, and magnet makes the back-moving spring compression;
When another part of overflow spool touches caging bolt, the stop motion of overflow spool; This moment, fluid began to push relief valve seat, and the elastic force of compressed overflow spring, and both combinations force relief valve seat and overflow spool to be separated; Fluid flows through from the gap between overflow spool and the relief valve seat, and through magnet side, back-moving spring side, from fluid egress point, flows out;
When fluid stops from fluid intake, to get into, under the effect of compressed back-moving spring, magnet movement is also pushed relief valve seat and is moved together; Under the effect of overflow spring, overflow spool and relief valve seat keep released state, and overflow spring, overflow spool are followed relief valve seat and moved together; Part until the overflow spool is close to first cavity; This moment, back-moving spring continued extruding magnet and relief valve seat, made relief valve seat and overflow spool contact the magnet stop motion;
In said process, Hall element is known the position of magnet through the size power of the magnetic signal of detection magnet, thereby learns whether fluid passes through runner.
After fluid sensor of the present invention made fluid from the flow state to the stationary state through this structure of surplus valve, total system can return to original state as early as possible, detected thereby sensor is met next time reliably.Its also have volume little, be prone to install, characteristics such as with low cost.The method of the flow state of this fluid sensor and test fluid thereof can adapt to the fluid of any kind of, is particularly useful for the liquid that flow velocity is slow, viscosity is high.
Description of drawings
Fig. 1 is the diagrammatic cross-section of an embodiment of fluid sensor of the present invention;
Fig. 2 is the enlarged diagram of overflow spool among Fig. 1;
Fig. 3 is the enlarged diagram of relief valve seat among Fig. 1.
Description of reference numerals among the figure:
10 is fluid sensor; 11 is housing; 20 is runner; 20a is first cavity; 20b is second cavity; 21 is fluid intake; 22 is fluid egress point; 30 is surplus valve; 31 are the overflow spool; 311 are overflow spool bottom; 312 are overflow spool pars intermedia; 312a is a chamfer site; 313 are overflow spool push rod; 32 is relief valve seat; 32a is a chamfer site; 32b is a balancing slit; 33 are the overflow spring; 41 is magnet; 42 is caging bolt; 43 is back-moving spring; 50 is Hall element.
Embodiment
See also Fig. 1, this is an embodiment of fluid sensor of the present invention.This fluid sensor 10 has housing 11, has fluid intake 21 at an end of housing 11, and the other end has fluid egress point 22.Has the runner 20 that holds the fluid process between fluid intake 21 and the fluid egress point 22 and in housing 11 inside.Runner 20 includes the first cavity 20a and the second cavity 20b that is interconnected at least, and the latter's sectional area is bigger, and therefore the second cavity 20b still has the part bottom surface with the first cavity 20a place of being connected.Preferably, the first cavity 20a and the second cavity 20b all are right cylinder, and two cylindrical axles are on same straight line, and this moment, the second cavity 20b had the bottom surface of an annular with the first cavity 20a place of being connected.
In the second cavity 20b, have surplus valve 30, it comprises overflow spool 31, relief valve seat 32 and is fixed on overflow spring 33 between the two.When overflow spool 31 and relief valve seat 32 contacted, overflow spring 33 was compressed state.
See also Fig. 2, overflow spool 31 comprises maximum medium pars intermedia 312 and the minimum push rod 313 of sectional area of bottom 311, sectional area of sectional area that is connected successively.Preferably, the bottom 311 of overflow spool 31, pars intermedia 312 and push rod 313 all are right cylinder, and three cylindrical axles are on same straight line, with the axle of the columniform first cavity 20a and the second cavity 20b also on same straight line.The sectional area of overflow spool bottom 311 is greater than the first cavity 20a, but is slightly less than the second cavity 20b.Overflow spool bottom 311 is arranged in the second cavity 20b, but is close to the first cavity 20a, is promptly pressing the second cavity 20b and is being connected with the first cavity 20a on the annular bottom surface of locating.Be processed with chamfer site 312a on the overflow spool pars intermedia 312.Preferably, when overflow spool pars intermedia 312 was right cylinder, this chamfer site 312 was the side of round platform.
See also Fig. 1 and Fig. 3, contacted with the chamfer site 312a of overflow spool pars intermedia 312 is relief valve seat 32, and it is also in the second cavity 20b.Preferably, relief valve seat 32 roughly is circular.On relief valve seat 32, also be processed with chamfer site 32a.Preferably, this chamfer site 32a is the side of round platform.The chamfer site 32a of relief valve seat 32 just matches to merge with the chamfer site 312a of overflow spool pars intermedia 312 and contacts.Keep sealing between the inwall of the lateral surface of relief valve seat 32 and the second cavity 20b, also have balancing slit 32b on this lateral surface.Preferably, when relief valve seat 32 is roughly when circular, this balancing slit 32b is toroidal.Overflow spool push rod 313 passes the endoporus of the relief valve seat 32 of annular, has the gap between the two.
In the second cavity 20b, also has magnet 41.Preferably, magnet 41 is rectangular parallelepiped.Other end place at housing 11 has caging bolt 42.Preferably, caging bolt 42 is right cylinder.On this caging bolt 42, offer one or more through holes as fluid egress point 22.Back-moving spring 43 is fixed between magnet 41 and the caging bolt 42.When magnet 41 contacts with relief valve seat 32 and relief valve seat 32 contacts with overflow spool 31 and overflow spool 31 when being close to the first cavity 20a, back-moving spring 43 is the normal condition that not compression does not also stretch.The elastic force of compressed overflow spring 33 when the elastic force of the back-moving spring 43 of this normal condition contacts with overflow spool 31 greater than relief valve seat 32, thereby this back-moving spring 43 forces overflow spool 31 and relief valve seat 32 to contact and presses.
Overflow spool push rod 313 passes outside magnet 41, than magnet 41 more near caging bolt 42.
Also have a groove in the side of housing 11, wherein be provided with Hall element 50, be used for detecting the magnetic signal of magnet 41 and convert electric signal output into.
The principle of work of the flow state of above-mentioned fluid sensor test fluid is following.
Under the original state, overflow spool bottom 311 is close to the first cavity 20a, and the chamfer site 32a of relief valve seat 32 contacts with the chamfer site 312a of overflow spool pars intermedia 312, and magnet 41 contacts with relief valve seat 32.Overflow spring 33 is compressed, but because the bigger back-moving spring 43 of elastic force, even back-moving spring 43 is compressed also is not stretched, but still makes overflow spool 31 and relief valve seat 32 contact and press.
Get into runner 20 as fluid (especially liquid) from fluid intake 21; And when getting into the second cavity 20b by the first cavity 20a; The pressure extrusion of fluid overflow spool 31 to left movement; Overflow spool 31 is pushing relief valve seat 32 again to left movement, and the overflow spring 33 that is positioned between the two still keeps former compressed state.Blow-by between the inwall of the overflow spool 31 and the second cavity 20b, so fluid can be full of between the inwall of side and the second cavity 20b of overflow spool 31.Seal between the inwall of the lateral surface of relief valve seat 32 and the second cavity 20b, so fluid can rest on the right side of relief valve seat 32.The space on relief valve seat 32 right sides is pressure maintenance balance owing to UNICOM, and fluid can't make overflow spool 31 and relief valve seat 32 be separated.Whole surplus valve 30 is pushing magnet 41 to left movement.Magnet 41 makes back-moving spring 43 present compressed state again.
Along with overflow spool 31, relief valve seat 32 and magnet together to left movement, when overflow spool push rod 313 touches caging bolt 43,31 stop motions of overflow spool.This moment, fluid began to push relief valve seat 32, and the elastic force of compressed overflow spring 33, and both combinations force relief valve seat 32 and overflow spool 31 to be separated.Fluid flows through from the gap between overflow spool 31 and the relief valve seat 32, and through magnet 41 sides, back-moving spring 43 sides, flows out the fluid egress point 22 from caging bolt 42.
When fluid stops from fluid intake 21 getting into, then overflow spool 31 and relief valve seat 32 no longer receive the pressure of fluid.Under the effect of compressed back-moving spring 43, magnet 41 moves right and pushes relief valve seat 32 and moves right together.Under the effect of overflow spring 33, overflow spool 31 keeps released states with relief valve seat 32, and overflow spring 33, overflow spool 31 are followed relief valve seat 32 and moved right together.This moment, back-moving spring 43 moved right magnet 41, relief valve seat 32, overflow spring 33 and overflow spool 31 together, was close to the first cavity 20a until overflow spool 31.Back-moving spring 43 continues extruding magnet 41 and relief valve seat 32, and therefore relief valve seat 32 pushes overflow spring 33, makes relief valve seat 32 and overflow spool 31 contact, and overflow spring 33 reverts to the confined state under the original state.Magnet 41 stop motions, back-moving spring 43 reverts to the state that not being compressed under the original state is not stretched yet.
In the process that above-mentioned fluid begins also finally to stop through runner 20, Hall element 50 is through the strong and weak position of knowing magnet 41 of the size of the magnetic signal of detection magnet 41.Preferably, with Hall element 50 be arranged on original state under the nearest position of magnet 41, thereby under original state, can detect the strongest magnetic signal.When magnetic signal dies down, then represent magnet 41 away from Hall element 50, expression simultaneously has the fluid process.When magnetic signal comes back to the byest force, represent that then magnet 41 returns the original position under the original states, expression does not simultaneously have the fluid process.
More than be merely the preferred embodiments of the present invention, and be not used in qualification the present invention.For a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a fluid sensor is characterized in that, comprising:
Housing, its side has a groove; The one of which end has fluid intake; Its other end has fluid egress point; Has the runner that connects fluid intake and fluid egress point in enclosure interior; Said runner comprises first cavity and second cavity of connection, and the latter's sectional area is bigger;
Surplus valve is fixed in second cavity slidably, comprises overflow spool, relief valve seat and is fixed on overflow spring between the two; Said overflow spool and relief valve seat contact; The sectional area of the part of said overflow spool is greater than first cavity and less than second cavity, and this part of overflow spool is close to first cavity; Another part of said overflow spool passes relief valve seat and gives prominence to outside magnet, this part than magnet more near caging bolt;
Magnet is fixed in second cavity slidably, and is close to surplus valve;
Caging bolt is arranged on that end that housing has fluid egress point;
Back-moving spring is fixed between magnet and the caging bolt;
Hall element is arranged in the groove of side.
2. fluid sensor according to claim 1 is characterized in that, said overflow spool comprises continuous bottom, pars intermedia and push rod, and the sectional area of this three part reduces successively.
3. fluid sensor according to claim 2 is characterized in that, the sectional area of said overflow spool bottom is greater than first cavity and less than second cavity, and the bottom of overflow spool is close to first cavity.
4. fluid sensor according to claim 2 is characterized in that, said overflow spool push rod is given prominence to outside magnet, than magnet more near caging bolt.
5. fluid sensor according to claim 1 is characterized in that said relief valve seat in the form of a ring; Sealing each other between the inwall of the lateral surface of said relief valve seat and second cavity.
6. fluid sensor according to claim 1 is characterized in that, has chamfer site on the said overflow spool, also has chamfer site on the said relief valve seat, and said overflow spool and the relief valve seat chamfer site through separately cooperatively interacts and contacts.
7. fluid sensor according to claim 5 is characterized in that, is processed with on the lateral surface of said relief valve seat together or the multiple tracks balancing slit, and said balancing slit in the form of a ring.
8. fluid sensor according to claim 1 is characterized in that said caging bolt is provided with one or more through holes, and these through holes are as fluid egress point.
9. the method for the flow state of fluid sensor test fluid as claimed in claim 1 is characterized in that:
Under the original state, the part of overflow spool is close to first cavity, and relief valve seat contacts with the overflow spool, and magnet contacts with relief valve seat;
Get into runner as fluid from fluid intake, the pressure extrusion of fluid the overflow valve core movement, and the overflow spool is pushing the relief valve seat motion again, and relief valve seat is pushing magnet movement, and magnet makes the back-moving spring compression;
When another part of overflow spool touches caging bolt, the stop motion of overflow spool; This moment, fluid began to push relief valve seat, and the elastic force of compressed overflow spring, and both combinations force relief valve seat and overflow spool to be separated; Fluid flows through from the gap between overflow spool and the relief valve seat, and through magnet side, back-moving spring side, from fluid egress point, flows out;
When fluid stops from fluid intake, to get into, under the effect of compressed back-moving spring, magnet movement is also pushed relief valve seat and is moved together; Under the effect of overflow spring, overflow spool and relief valve seat keep released state, and overflow spring, overflow spool are followed relief valve seat and moved together; Part until the overflow spool is close to first cavity; This moment, back-moving spring continued extruding magnet and relief valve seat, made relief valve seat and overflow spool contact the magnet stop motion;
In said process, Hall element is known the position of magnet through the size power of the magnetic signal of detection magnet, thereby learns whether fluid passes through runner.
10. the method for the flow state of fluid sensor test fluid according to claim 9 is characterized in that: Hall element be arranged on original state under the nearest position of magnet, thereby under original state, detect the strongest magnetic signal;
When magnetic signal dies down, then represent magnet away from Hall element, expression simultaneously has the fluid process;
When magnetic signal comes back to the byest force, represent that then magnet returns the original position under the original state, expression does not simultaneously have the fluid process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110374707 CN102519524B (en) | 2011-11-22 | 2011-11-22 | Fluid sensor and method for detecting flow state of fluid by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110374707 CN102519524B (en) | 2011-11-22 | 2011-11-22 | Fluid sensor and method for detecting flow state of fluid by using same |
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| Publication Number | Publication Date |
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| CN102519524A true CN102519524A (en) | 2012-06-27 |
| CN102519524B CN102519524B (en) | 2013-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110374707 Expired - Fee Related CN102519524B (en) | 2011-11-22 | 2011-11-22 | Fluid sensor and method for detecting flow state of fluid by using same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990260A (en) * | 2017-06-02 | 2017-07-28 | 江苏科技大学 | The tachymeter and measuring method of a kind of utilization vortex-induced vibration |
| CN109324206A (en) * | 2018-11-09 | 2019-02-12 | 益阳陈克明食品股份有限公司 | A kind of water for food processing stream speed detector |
| CN110749356A (en) * | 2019-10-16 | 2020-02-04 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
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| CN2170574Y (en) * | 1993-09-05 | 1994-06-29 | 鞍山钢铁公司 | Oil leakage prevention relay for hydraulic system |
| CN2927057Y (en) * | 2006-06-15 | 2007-07-25 | 王东升 | Fluid sensor |
| JP2010034000A (en) * | 2008-07-31 | 2010-02-12 | Maruyama Mfg Co Ltd | Pressure switch |
| CN101989512A (en) * | 2009-08-03 | 2011-03-23 | Smc株式会社 | Pressure switch |
| CN202350802U (en) * | 2011-11-22 | 2012-07-25 | 上海三浪车辆部件有限公司 | Fluid sensor |
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2011
- 2011-11-22 CN CN 201110374707 patent/CN102519524B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2170574Y (en) * | 1993-09-05 | 1994-06-29 | 鞍山钢铁公司 | Oil leakage prevention relay for hydraulic system |
| CN2927057Y (en) * | 2006-06-15 | 2007-07-25 | 王东升 | Fluid sensor |
| JP2010034000A (en) * | 2008-07-31 | 2010-02-12 | Maruyama Mfg Co Ltd | Pressure switch |
| CN101989512A (en) * | 2009-08-03 | 2011-03-23 | Smc株式会社 | Pressure switch |
| CN202350802U (en) * | 2011-11-22 | 2012-07-25 | 上海三浪车辆部件有限公司 | Fluid sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990260A (en) * | 2017-06-02 | 2017-07-28 | 江苏科技大学 | The tachymeter and measuring method of a kind of utilization vortex-induced vibration |
| CN106990260B (en) * | 2017-06-02 | 2019-04-23 | 江苏科技大学 | A kind of tachymeter and measurement method using vortex-induced vibration |
| CN109324206A (en) * | 2018-11-09 | 2019-02-12 | 益阳陈克明食品股份有限公司 | A kind of water for food processing stream speed detector |
| CN109324206B (en) * | 2018-11-09 | 2021-07-27 | 益阳陈克明食品股份有限公司 | Water flow velocity detection device for food processing |
| CN110749356A (en) * | 2019-10-16 | 2020-02-04 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
| CN110749356B (en) * | 2019-10-16 | 2021-08-31 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
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| CN102519524B (en) | 2013-10-16 |
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