CN102661762A - Flow sensor - Google Patents
Flow sensor Download PDFInfo
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- CN102661762A CN102661762A CN2012101522033A CN201210152203A CN102661762A CN 102661762 A CN102661762 A CN 102661762A CN 2012101522033 A CN2012101522033 A CN 2012101522033A CN 201210152203 A CN201210152203 A CN 201210152203A CN 102661762 A CN102661762 A CN 102661762A
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Abstract
The invention discloses a flow sensor. The flow sensor comprises a water inlet, a water outlet, a first water inlet channel, a second water inlet channel, an impeller cavity, a first magnet, a micro-pressure opening valve and a Hall element, wherein inlets of the first water inlet channel and the second water inlet channel are communicated with the water inlet; outlets of the first water inlet channel and the second water inlet channel are respectively communicated with the impeller cavity; the outlet of the impeller cavity is communicated with the water outlet; an impeller is arranged in the impeller cavity; the first magnet is arranged on the impeller; the Hall element is arranged in the position corresponding to the first magnet on the outer side of the impeller cavity; and the micro-pressure opening valve is arranged in the first water inlet channel. The flow sensor disclosed by the invention is provided with the two water inlet channels which are respectively used for detecting large water flow rate and small water flow rate, and the micro-pressure opening valve is arranged in the first water inlet channel, so that the flow sensor disclosed by the invention can detect the large flow rate which is more than 4L/min and the small flow rate which is less than 200mL/min, and further reduce the startup flow rate to 30mL/min.
Description
Technical field
The present invention relates to flow sensor.
Background technology
Flow sensor is a kind of device that can detect fluid flow high low signal in the pipeline, in the control system of fluid machinery, often uses.With flow sensor with can be used to the accumulative total fluid total volume after suitable mechanical hook-up and/or electric device combine, also can be used for detecting instantaneous delivery.The device that in the control system of water disposal facility, is used for the accumulative total water inventory is called water meter; The device that is used to detect instantaneous delivery is called flowmeter, and water meter and flowmeter can adopt flow sensor is designed and makes with the mode that suitable mechanical hook-up and/or electric device combine.
What the method for detection instantaneous delivery or the principle of flow sensor were commonly used at present has three kinds:
1. keep when flowing with fluid on the impeller that when fluid flows, can rotate at correspondence position Hall element and magnet being set respectively on the motionless housing; When fluid flowed, impeller will rotate, thereby makes Hall element and magnet constantly each other near exporting electric make-and-break signal with leaving; Electric control system is handled this make-and-break signal; Promptly the break-make number of times is counted, the number of times multithread amount more of break-make is just big more in the unit interval, otherwise flow is just more little.Break-make number of times in unit interval is multiplied by the concrete numerical value that a coefficient can obtain instantaneous delivery.With the flow sensor of this principle design, can detected minimum flow be 100mL/min～120mL/min at present.
2. with rotary-piston positive displacement principle; For example the patent No. is the patent documentation disclosed method of CN01105259.7; Though can detect littler flow; Introduce it according to the data of this series products (being called drip water meter) on the market and can detected minimum flow (also claiming the beginning moving flow) be 2L/h, i.e. 33.3mL/min.But, because the gap between its inner part that slides each other must be very little, above-mentioned outstanding performance can be arranged, so this type water meter can only be used in the water circuit system that detects this high-quality water quality of pure water, can not be used in and detect in the system of tap water water route.
3. when fluid flows, can go up on the motionless housing of maintenance when flowing and at correspondence position magnet and Hall element or tongue tube are set respectively along move forward moving core (or float) that a segment distance and fluid can reposition when not flowing of water (flow) direction with fluid; Like this; Export break-make or open close electric signal respectively in water flows with when not flowing, for example the patent No. is 200710029502.7 the disclosed technical scheme of patent documentation.Can detect the minimum about 200mL/min of flow with current on-off principle designed flow sensor at present; Promptly, flow thinks that water is in flow state when above when reaching 200mL/min; Flow thinks that water is in not flow state during less than 200mL/min; Its detected flow is inadequately little, and detects less than concrete flow value.
Appliance water, the water purifier of family expenses or similar applications for example, its seepy question is considered to the weakness of industry, therefore, can find to leak and close the water source then automatically and be considered to one of technological development direction of the industry with the intelligent appliance water that sends warning.Leakage situation comprises that big flow leaks, and normal discharge leaks and tiny leakage.Known technology can solve the flow detection problem of big flow and normal discharge.The flow that surpasses the normal operation of appliance water is called big flow, and big flow leaks can either detect also to be judged easily; The flow value that normal discharge leaks also detects easily, combines the out of Memory key element just can make again and leaks judgement; And tiny leakage is meant the leakage less than the flow of the normal operation of appliance water.For example, when leakage flow is 60mL/min, be exactly tiny leakage.If the flow with 60mL/min leaks, will leak 86.4L water behind the 24h, also can cause bigger economic loss, and can be used in the flow sensor of the known technology in the tap water water route at present to the user, all can not detect leakage flow less than 100mL/min.
In sum, be the deficiency that solves prior art, the needs design is a kind of can to detect big water flow, can detect the flow sensor of weep flow again.
Summary of the invention
Technical matters to be solved by this invention provides and a kind ofly can detect big water flow, can detect the flow sensor of weep flow again.
In order to solve the problems of the technologies described above, technical scheme provided by the present invention is: flow sensor comprises water inlet, water delivering orifice, first intake tunnel, second intake tunnel, impeller cavity, impeller, first magnet, minute-pressure open valve and Hall element; The inlet of said first intake tunnel and second intake tunnel all is communicated with water inlet; The outlet of first intake tunnel and second intake tunnel is communicated with impeller cavity respectively; The outlet of said impeller cavity is communicated with water delivering orifice; Said impeller is arranged in the impeller cavity; Said first magnet is arranged on the impeller; On the position of corresponding first magnet in the said impeller cavity outside Hall element is set; Said minute-pressure open valve is arranged in first intake tunnel.
Optimized technical scheme: flow sensor also comprises moving core, second magnet and Hall element or tongue tube; Said moving core is arranged in second intake tunnel, and second magnet is arranged on the moving core, on the position of corresponding second magnet in second intake tunnel outside Hall element or tongue tube is set.
Further technical scheme: the porch of said second intake tunnel is provided with second inlet opening that diameter is not more than 1.2mm; The bottom of said moving core has the surface of concave shape, and the water side of second inlet opening is over against the bottom of moving core.
Further technical scheme: also comprise second spring that is arranged in second intake tunnel; One end of said second spring is against on the moving core, and the other end is against on the inwall of second intake tunnel.
Optimized technical scheme: said first magnet is provided with two; Said two first magnet are separately positioned on the symmetric position of the both sides, center of impeller, and the N utmost point of two first magnet and S are reverse extremely each other.
Optimized technical scheme: the smallest cross-sectional diameter of said first intake tunnel is not less than 3mm, and perhaps minimum sectional area is not less than 7mm
2
Optimized technical scheme: the smallest cross-sectional diameter of said second intake tunnel is not more than 1.2mm, and perhaps minimum sectional area is not more than 1.13mm
2
Optimized technical scheme: when said flow sensor moved, the gap that can produce between the part that relatively moves was at least 0.1mm, and the porch of first intake tunnel and second intake tunnel is equipped with filtering element.
Optimized technical scheme: the rotating shaft of said impeller is horizontally disposed with.
Optimized technical scheme: said minute-pressure open valve comprises flap, O-ring seal and first spring that is arranged in first intake tunnel, and the valve import; Said O-ring seal is arranged on the flap; One end of said first spring is against on the flap, and the other end is against on the inwall of first intake tunnel; Said valve import place part connects with the inner wall sealing of first intake tunnel; Be provided with guide frame between the inwall of the outside of said flap and first intake tunnel.
After having adopted technique scheme, the present invention has following beneficial effect:
(1) the present invention is respectively applied for the intake tunnel that detects big water flow and weep flow through being provided with two; And the minute-pressure open valve is set in first intake tunnel; The minute-pressure open valve is in closed condition when flow is very little, and all current can only pass through from second intake tunnel, thereby improves the flow velocity of second intake tunnel; And then can detect littler flow; Thereby make the present invention can either detect big flow, also can detect low discharge, and moving flow of beginning can be reduced to 30mL/min less than 200mL/min greater than 4L/min.
When (2) the present invention moves; The gap that can produce between the part that relatively moves is at least 0.1mm; And the logical porch of first water inlet with second intake tunnel be equipped with can block water in the filtering element of particle, thereby make the present invention can be used in the tap water water route.
(3) the smallest cross-sectional diameter of first intake tunnel of the present invention is not less than 3mm, and perhaps minimum sectional area is not less than 7mm
2, this structure is convenient to reduce resistance to water-flow, makes that the discharge of from first intake tunnel, passing through is bigger, and then detects bigger flow.
(4) the smallest cross-sectional diameter of second intake tunnel of the present invention is not more than 1.2mm, and perhaps minimum sectional area is not more than 1.13mm
2, this structure is convenient to improve water velocity, makes when flow is very little, and the current that flow into impeller cavity from second intake tunnel also can impeller rotate.
(5) bottom of moving core of the present invention has the surface of concave shape, and the water side of second inlet opening is over against the bottom of moving core, and this structure can make full use of into water kinetic energy and promote moving core and move, thereby detects small flow.
(6) rotating shaft of impeller of the present invention is horizontally disposed with; Friction force when this structure can reduce wheel rotation to greatest extent; Thereby make littler flow impeller to rotate, needed minimum flow when promptly reducing impeller to greatest extent and beginning to rotate.
Description of drawings
For content of the present invention is expressly understood more easily,, the present invention is done further detailed explanation, wherein below according to specific embodiment and combine accompanying drawing
Fig. 1 is the structural representation of embodiments of the invention 1.
Fig. 2 is the structural representation of embodiments of the invention 2.
Label in the accompanying drawing is:
Embodiment
(embodiment 1)
See Fig. 1; The flow sensor of present embodiment comprises water inlet 1, water delivering orifice 2, first intake tunnel 3, second intake tunnel 4, impeller cavity 5, impeller 6, first magnet 7, minute-pressure open valve 8, Hall element, moving core 9, second magnet 10, Hall element or tongue tube 11 and filtering element 13.
The inlet of first intake tunnel 3 and second intake tunnel 4 all is communicated with water inlet 1.The outlet of first intake tunnel 3 and second intake tunnel 4 is communicated with impeller cavity 5 respectively.The outlet of impeller cavity 5 is communicated with water delivering orifice 2.Impeller 6 is arranged in the impeller cavity 5, and the rotating shaft 6-1 of impeller 6 is horizontally disposed with.First magnet 7 is provided with two; Two first magnet 7 are separately positioned on the symmetric position of the both sides, center of impeller 6; And the N utmost point of two first magnet 7 and S are reverse extremely each other, and when impeller 6 forwarded the appropriate location to, wherein one first magnet 7 made it be in a kind of electric state near Hall element; And turning over 180 when spending when impeller, another piece first magnet 7 makes it be in another kind of electric state near Hall element.On the position of corresponding first magnet 7 in impeller cavity 5 outsides Hall element is set.Minute-pressure open valve 8 is arranged in first intake tunnel 3.
When the flow sensor of present embodiment moves; The gap that can produce between the part that relatively moves is at least 0.1mm; And the porch of logical 3 and second intake tunnel 4 of first water inlet is equipped with filtering element 13, thereby makes the flow sensor of present embodiment can be used in the tap water water route.
The smallest cross-sectional diameter of first intake tunnel 3 is not less than 3mm, and perhaps minimum sectional area is not less than 7mm
2The preferred smallest cross-sectional diameter of present embodiment is not less than 4mm, and perhaps minimum sectional area is not less than 12mm
2This structure is convenient to reduce resistance to water-flow, makes that the discharge of from first intake tunnel, passing through is bigger, and then detects bigger flow.
The smallest cross-sectional diameter of second intake tunnel 4 is not more than 1.2mm, and perhaps minimum sectional area is not more than 1.13mm
2The preferred smallest cross-sectional diameter of present embodiment is not more than 1.0mm, and perhaps minimum sectional area is not more than 0.78mm
2This structure is convenient to improve water velocity, makes when flow is very little, and the current that flow out from second intake tunnel also can impeller 6 rotate.
Minute-pressure open valve 8 comprises flap 8-1, sealing gasket 8-2 and the first spring 8-3 that is arranged in first intake tunnel 3, and the valve import.Sealing gasket 8-2 is arranged on the flap 8-1.The end of the first spring 8-3 is against on the flap 8-1, and the other end is against on the inwall of first intake tunnel 3.Valve import place part connects with the inner wall sealing of first intake tunnel 3.Be provided with guide frame between the inwall of the outside of flap 8-1 and first intake tunnel 3.The valve import of present embodiment is the first inlet opening 3-1 of the porch that is arranged on first intake tunnel 3.When minute-pressure open valve 8 was closed, sealing gasket 8-2 was against 3-1 place, first inlet opening and makes it sealing under the elastic force effect of the first spring 8-3.
The function of minute-pressure open valve 8 is: at the flow of this flow sensor of flowing through during less than 200L/min; Because of the speed of current is very little, then the pipeline linear loss is very little, and promptly the pressure reduction between minute-pressure open valve 8 entrance ends is very little; Under the situation of such minute-pressure difference; Minute-pressure open valve 8 is in closed condition, and whole current of this flow sensor of flowing through are all flow through through second intake tunnel 4, is convenient to detect small flow; And when the flow of this flow sensor of flowing through was not less than 200L/min, relatively large because of the speed of current, then the pipeline linear loss was also bigger, and promptly the pressure reduction between minute-pressure open valve 8 entrance ends is also bigger, and at this moment, minute-pressure open valve 8 is in opening.
Moving core 9 is arranged in second intake tunnel 4, and second magnet 10 is arranged on the moving core 4, on the position of corresponding second magnet 10 in second intake tunnel, 4 outsides Hall element or tongue tube 11 is set.The porch of second intake tunnel 4 is provided with the second inlet opening 4-1 that diameter is not more than 1.2mm.The surface that the bottom of moving core 9 has concave shape, the water side of the second inlet opening 4-1 are over against the bottom of moving core 9, and the moving core 9 of water kinetic energy promotion moves so that make full use of into, detects small flow.
The power that the moving core 9 of present embodiment resets is the gravity of moving core 9 self, and the moving direction of moving core 9 is a vertical direction, and current flow from bottom to top.
(embodiment 2)
See Fig. 2, present embodiment and embodiment 1 are basic identical, and difference is: also comprise second spring 12.
The power that the moving core 9 of present embodiment resets is the elastic force of second spring 12, and the moving direction of moving core 9 is preferably horizontal direction.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. flow sensor is characterized in that: comprise water inlet (1), water delivering orifice (2), first intake tunnel (3), second intake tunnel (4), impeller cavity (5), impeller (6), first magnet (7), minute-pressure open valve (8) and Hall element; The inlet of said first intake tunnel (3) and second intake tunnel (4) all is communicated with water inlet (1); The outlet of first intake tunnel (3) and second intake tunnel (4) is communicated with impeller cavity (5) respectively; The outlet of said impeller cavity (5) is communicated with water delivering orifice (2); Said impeller (6) is arranged in the impeller cavity (5); Said first magnet (7) is arranged on the impeller (6); On the position of said impeller cavity (5) corresponding first magnet in the outside (7) Hall element is set; Said minute-pressure open valve (8) is arranged in first intake tunnel (3).
2. flow sensor according to claim 1 is characterized in that: also comprise moving core (9), second magnet (10) and Hall element or tongue tube (11); Said moving core (9) is arranged in second intake tunnel (4), and second magnet (10) is arranged on the moving core (4), on the position of second intake tunnel (4) corresponding second magnet in the outside (10) Hall element or tongue tube (11) is set.
3. flow sensor according to claim 1 is characterized in that: said first magnet (7) is provided with two; Said two first magnet (7) are separately positioned on the symmetric position of the both sides, center of impeller (6), and the N utmost point of two first magnet (7) and S are reverse extremely each other.
4. flow sensor according to claim 1 is characterized in that: the smallest cross-sectional diameter of said first intake tunnel (3) is not less than 3mm, and perhaps minimum sectional area is not less than 7mm
2
5. flow sensor according to claim 1 is characterized in that: the smallest cross-sectional diameter of said second intake tunnel (4) is not more than 1.2mm, and perhaps minimum sectional area is not more than 1.13mm
2
6. flow sensor according to claim 1; It is characterized in that: when said flow sensor moves; The gap that can produce between the part that relatively moves is at least 0.1mm, and the porch of first intake tunnel (3) and second intake tunnel (4) is equipped with filtering element (13).
7. flow sensor according to claim 2 is characterized in that: the porch of said second intake tunnel (4) is provided with second inlet opening (4-1) that diameter is not more than 1.2mm; The surface that the bottom of said moving core (9) has concave shape, the water side of second inlet opening (4-1) is over against the bottom of moving core (9).
8. flow sensor according to claim 1 is characterized in that: the rotating shaft (6-1) of said impeller (6) is horizontally disposed with.
9. flow sensor according to claim 1 is characterized in that: said minute-pressure open valve (8) comprises flap (8-1), sealing gasket (8-2) and first spring (8-3) that is arranged in first intake tunnel (3), and the valve import; Said sealing gasket (8-2) is arranged on the flap (8-1); One end of said first spring (8-3) is against on the flap (8-1), and the other end is against on the inwall of first intake tunnel (3); Said valve import place part connects with the housing seal of first intake tunnel (3); Be provided with guide frame between the inwall of the outside of said flap (8-1) and first intake tunnel (3).
10. flow sensor according to claim 2 is characterized in that: also comprise second spring (12) that is arranged in second intake tunnel (4); One end of said second spring (12) is against on the moving core (9), and the other end is against on the inwall of second intake tunnel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210152203.3A CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210152203.3A CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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| CN102661762A true CN102661762A (en) | 2012-09-12 |
| CN102661762B CN102661762B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210152203.3A Expired - Fee Related CN102661762B (en) | 2012-05-15 | 2012-05-15 | Flow sensor |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644945A (en) * | 2013-11-01 | 2014-03-19 | 曹佩森 | Multifunctional water meter |
| CN104089663A (en) * | 2014-08-07 | 2014-10-08 | 成都前锋电子有限责任公司 | Water flow sensor with water inlet rectification device |
| CN104422486A (en) * | 2013-08-22 | 2015-03-18 | 上海科勒电子科技有限公司 | Flow meter |
| CN105795834A (en) * | 2016-05-02 | 2016-07-27 | 上海云饮信息科技有限公司 | Water glass measuring water-drinking amount |
| CN106323389A (en) * | 2016-10-28 | 2017-01-11 | 超达阀门集团丽水有限公司 | Impeller type gas flow metering device |
| CN107270977A (en) * | 2016-04-06 | 2017-10-20 | 深圳市泉源仪表设备制造有限公司 | A kind of binary channels turbine flowmeter |
| CN108378707A (en) * | 2018-02-08 | 2018-08-10 | 无锡鼎加弘思饮品科技有限公司 | There is the flowmeter and its current stabilization method of current-stabilizing structure inside capsule coffee machine |
| CN110044427A (en) * | 2019-04-08 | 2019-07-23 | 杨国庆 | A kind of fluid flux measurement technology of multichannel flow linkage |
| CN110044426A (en) * | 2019-04-08 | 2019-07-23 | 杨国庆 | A kind of flow sensor of multichannel flow linkage |
| CN110749356A (en) * | 2019-10-16 | 2020-02-04 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
| CN110939777A (en) * | 2018-09-25 | 2020-03-31 | 新昌县晶鑫精密机械配件有限公司 | Leakage-proof water replenishing valve of closed circulation system and detection method thereof |
| CN113237523A (en) * | 2021-05-11 | 2021-08-10 | 韩军蕊 | Water meter |
| CN113568050A (en) * | 2021-07-16 | 2021-10-29 | 厦门市欧立通电子科技开发有限公司 | A liquid flow detector |
| CN114252113A (en) * | 2021-12-14 | 2022-03-29 | 中山市思源电器有限公司 | A stable water flow sensor |
| CN115961906A (en) * | 2022-12-15 | 2023-04-14 | 江苏雄越石油机械设备制造有限公司 | Extra-high voltage wellhead device |
| CN119289202A (en) * | 2024-12-16 | 2025-01-10 | 山东鲁盾聚氨酯制品有限公司 | A water conservancy project anti-leakage drainage pipeline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0834721A2 (en) * | 1996-10-04 | 1998-04-08 | Bürkert Werke GmbH & Co. | Flow sensor |
| CN2420622Y (en) * | 2000-04-06 | 2001-02-21 | 青岛琴翔电器技术研究所有限公司 | Water current sensor |
| CN201170735Y (en) * | 2008-02-03 | 2008-12-24 | 广东万家乐燃气具有限公司 | Low pressure start water flow sensor |
| CN202748070U (en) * | 2012-05-15 | 2013-02-20 | 江苏正本净化节水科技实业有限公司 | Flow sensor |
-
2012
- 2012-05-15 CN CN201210152203.3A patent/CN102661762B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0834721A2 (en) * | 1996-10-04 | 1998-04-08 | Bürkert Werke GmbH & Co. | Flow sensor |
| CN2420622Y (en) * | 2000-04-06 | 2001-02-21 | 青岛琴翔电器技术研究所有限公司 | Water current sensor |
| CN201170735Y (en) * | 2008-02-03 | 2008-12-24 | 广东万家乐燃气具有限公司 | Low pressure start water flow sensor |
| CN202748070U (en) * | 2012-05-15 | 2013-02-20 | 江苏正本净化节水科技实业有限公司 | Flow sensor |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422486A (en) * | 2013-08-22 | 2015-03-18 | 上海科勒电子科技有限公司 | Flow meter |
| CN103644945B (en) * | 2013-11-01 | 2016-08-17 | 曹佩森 | A kind of multifunctional watermeter |
| CN103644945A (en) * | 2013-11-01 | 2014-03-19 | 曹佩森 | Multifunctional water meter |
| CN104089663A (en) * | 2014-08-07 | 2014-10-08 | 成都前锋电子有限责任公司 | Water flow sensor with water inlet rectification device |
| CN107270977A (en) * | 2016-04-06 | 2017-10-20 | 深圳市泉源仪表设备制造有限公司 | A kind of binary channels turbine flowmeter |
| CN105795834A (en) * | 2016-05-02 | 2016-07-27 | 上海云饮信息科技有限公司 | Water glass measuring water-drinking amount |
| CN106323389A (en) * | 2016-10-28 | 2017-01-11 | 超达阀门集团丽水有限公司 | Impeller type gas flow metering device |
| CN108378707A (en) * | 2018-02-08 | 2018-08-10 | 无锡鼎加弘思饮品科技有限公司 | There is the flowmeter and its current stabilization method of current-stabilizing structure inside capsule coffee machine |
| CN110939777A (en) * | 2018-09-25 | 2020-03-31 | 新昌县晶鑫精密机械配件有限公司 | Leakage-proof water replenishing valve of closed circulation system and detection method thereof |
| CN110939777B (en) * | 2018-09-25 | 2025-02-18 | 新昌县晶鑫精密机械配件有限公司 | A leak-proof water supply valve for a closed circulation system and a detection method thereof |
| CN110044427A (en) * | 2019-04-08 | 2019-07-23 | 杨国庆 | A kind of fluid flux measurement technology of multichannel flow linkage |
| CN110044426A (en) * | 2019-04-08 | 2019-07-23 | 杨国庆 | A kind of flow sensor of multichannel flow linkage |
| CN110749356A (en) * | 2019-10-16 | 2020-02-04 | 扬州鑫昊重型机械有限公司 | Electric signal flowmeter |
| CN113237523A (en) * | 2021-05-11 | 2021-08-10 | 韩军蕊 | Water meter |
| CN113568050A (en) * | 2021-07-16 | 2021-10-29 | 厦门市欧立通电子科技开发有限公司 | A liquid flow detector |
| CN114252113A (en) * | 2021-12-14 | 2022-03-29 | 中山市思源电器有限公司 | A stable water flow sensor |
| CN115961906A (en) * | 2022-12-15 | 2023-04-14 | 江苏雄越石油机械设备制造有限公司 | Extra-high voltage wellhead device |
| CN115961906B (en) * | 2022-12-15 | 2024-02-27 | 江苏雄越石油机械设备制造有限公司 | Extra-high voltage wellhead device |
| CN119289202A (en) * | 2024-12-16 | 2025-01-10 | 山东鲁盾聚氨酯制品有限公司 | A water conservancy project anti-leakage drainage pipeline |
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