CN112212933A - Wet water meter - Google Patents
Wet water meter Download PDFInfo
- Publication number
- CN112212933A CN112212933A CN202010943972.XA CN202010943972A CN112212933A CN 112212933 A CN112212933 A CN 112212933A CN 202010943972 A CN202010943972 A CN 202010943972A CN 112212933 A CN112212933 A CN 112212933A
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- Prior art keywords
- water
- cavity
- flow
- meter
- counter
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Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims description 18
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims 4
- 239000011521 glass Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000008399 tap water Substances 0.000 description 10
- 235000020679 tap water Nutrition 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000002262 irrigation Effects 0.000 description 5
- 238000003973 irrigation Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a wet water meter, comprising: the water meter comprises a meter shell, a water inlet and a water outlet, wherein the meter shell is provided with a first cavity and a second cavity, the water inlet and the water outlet are communicated with the first cavity, and the second cavity is communicated with the first cavity; the impeller is arranged in the first cavity and can be driven to rotate by water flow; the counter is arranged in the second cavity, and the impeller is connected with the counter and can drive the counter; and the automatic exhaust device is connected with the watch case and is communicated with the second cavity, and when the liquid level of the water body in the second cavity is lower than a set value, the automatic exhaust device can be started to exhaust gas in the second cavity. The invention can ensure that the counter is immersed in water all the time to ensure the counting accuracy of the water meter.
Description
Technical Field
The invention relates to the technical field of water meters, in particular to a wet water meter with an automatic exhaust function.
Background
In the existing wet water meter, the counter is immersed in the water meter, the meter glass bears the water pressure, and the transmission of the sensor and the counter is in gear linkage. The requirement of a wet water meter is that the counter be submerged in water, which is determined by the characteristics of the wet water meter itself. The existing wet water meter is manufactured by forming a counter into a relatively sealed cavity through a complex design. When the water meter is produced and assembled, water is filled in a cavity for mounting the counter in advance, and after the water is filled, the water is sealed by the meter glass, the sealing washer, the cover and the like, so that the water is not lost, and the aim of always immersing the counter in the water is fulfilled. According to the water meter produced in the mode, the sealed water can be lost in a short time in the subsequent testing, packaging, transporting, storing, installing and using processes, and the water cannot be replenished after the water is lost. In addition, in the actual production operation of the wet water meter, a part of air which cannot be discharged is reserved in most counter cavities, and the loss of the pre-sealed water in the counter is accelerated by the residual air, especially when the large-diameter wet water meter has a large flow (such as Q3), the loss of the sealed water is particularly prominent. The consequence is that only a small amount of water is stored in the counter in a short time, which is not enough to submerge the counter, resulting in inaccurate counting of the water meter.
Disclosure of Invention
The invention provides a wet water meter, which can ensure that a counter is always immersed in water to ensure the counting accuracy of the water meter.
In order to solve the above technical problem, the present invention provides a wet water meter, including:
the water meter comprises a meter shell, a water inlet and a water outlet, wherein the meter shell is provided with a first cavity and a second cavity, the water inlet and the water outlet are communicated with the first cavity, and the second cavity is communicated with the first cavity;
the impeller is arranged in the first cavity and can be driven to rotate by water flow;
the counter is arranged in the second cavity, and the impeller is connected with the counter and can drive the counter;
and the automatic exhaust device is connected with the watch case and is communicated with the second cavity, and when the liquid level of the water body in the second cavity is lower than a set value, the automatic exhaust device can be started to exhaust gas in the second cavity.
Preferably, in the above technical solution, the second cavity is located above the first cavity, and the automatic exhaust device is located above the second cavity.
Preferably, the automatic exhaust device is an automatic exhaust valve, the automatic exhaust valve comprises a valve casing, a floating body, a linkage mechanism and an exhaust assembly, the valve casing is internally provided with a containing space, the valve casing is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the containing space, the exhaust assembly is arranged at the air outlet and used for opening or closing the air outlet, the floating body is connected with the exhaust assembly through the linkage mechanism, and the floating body can drive the exhaust assembly to move through the linkage mechanism so that the air outlet is in an opening or closing state.
Preferably, a water flow rectifier is arranged in the first cavity, a water flow channel is arranged on the water flow rectifier, and water flow entering from the water inlet can flow through the water flow channel of the water flow rectifier and is discharged from the water outlet.
Preferably, a filter screen is arranged at the inlet of the water flow rectifier.
Preferably, the water flow rectifier comprises a first rectifier and a second rectifier, the first rectifier is located near the water inlet, the second rectifier is located near the water outlet, and the impeller is located between the first rectifier and the second rectifier.
Preferably, a flow rate adjusting mechanism is disposed in the water flow channel of the water flow rectifier.
Preferably, in the above technical solution, the flow rate adjustment mechanism includes a sheet-shaped body, and the sheet-shaped body is rotatably disposed in a water flow passage of the water flow rectifier.
Preferably, the watch case comprises an upper case and a lower case, the upper case is connected with the lower case, a sealing ring is arranged at the joint of the upper case and the lower case, the upper case is provided with a second cavity, and the lower case is provided with a first cavity.
Preferably, a watch glass is arranged at the top opening of the upper shell, a copper cover is further arranged on the upper shell, and the copper cover is pressed on the watch glass so that the watch glass and the upper shell are positioned relatively.
The invention provides a wet water meter, wherein a first cavity is arranged in a meter shell, the first cavity is provided with a water inlet and a water outlet, the first cavity, the water inlet and the water outlet form a flowing channel of water flow, an impeller is arranged in the first cavity, a second cavity is arranged in the meter shell, a counter for measuring the flow of the water flow is arranged in the second cavity, the water flow can drive the impeller to rotate through the first cavity, the impeller can drive the counter to measure the flow of the water flow, when air enters the second cavity from a gap of the water meter, an automatic exhaust device is started to discharge the air entering the second cavity, the counter is ensured to be always immersed in the water body in a working state, and the measuring accuracy of the water meter can be ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic structural diagram of a wet water meter according to an embodiment of the present invention;
fig. 2 shows a schematic structural view of an automatic exhaust device in the embodiment of the invention.
In the figure: 10. a lower housing; 20. a flow rate adjusting mechanism; 30. a filter screen; 40. a rotating shaft; 50. a first rectifier; 60. an impeller; 70. an upper housing; 80. a copper cap; 90. a watch glass; 100. an automatic exhaust device; 200. a counter; 300. a central rotating shaft; 400. a second rectifier; 500. a watch case; 600. a water flow channel; 101. a first cavity; 102. a water inlet; 103. a water outlet; 104. a second cavity; 110. a valve housing; 120. an air inlet; 130. a float; 140. an accommodating space; 150. a linkage mechanism; 160. an exhaust assembly; 170. and an air outlet.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides a wet water meter, including:
the watch case 500 is provided with a first cavity 101 and a second cavity 104, a water inlet 102 and a water outlet 103 are arranged on the watch case, the water inlet 102 and the water outlet 103 are communicated with the first cavity 101, and the second cavity 104 is communicated with the first cavity 101;
the impeller 60 is arranged in the first cavity 101, and the impeller 60 can be driven to rotate by water flow;
a counter 200 disposed in the second cavity 104, the impeller 60 being connected to the counter 200 and capable of driving the counter 200;
and the automatic air exhaust device 100 is connected with the watch case 500 and is communicated with the second cavity 104, and the automatic air exhaust device 100 can be started to exhaust the gas in the second cavity 104 when the liquid level of the water in the second cavity 104 is lower than a set value.
The wet water meter of the embodiment includes a first cavity 101 in a meter case 500, the first cavity 101 has a water inlet 102 and a water outlet 103, the first cavity 101, the water inlet 102 and the water outlet 103 form a flow passage of water, an impeller is disposed in the first cavity 101, a second cavity 104 is disposed in the meter case 500, a counter 200 for measuring a flow rate of water is disposed in the second cavity 104, the impeller 60 can be driven by the water flow passing through the first cavity 101 to rotate, the impeller 60 can drive the counter 200 to measure the flow rate of water, when air enters the second cavity 104 from a gap between the water meters, the automatic exhaust device 100 is opened to discharge gas entering the second cavity 104, so as to ensure that the counter 200 is always immersed in a water body in a working state, and improve a measurement accuracy of the water meter.
In addition, in the embodiment, the automatic exhaust device 100 can be turned on to exhaust the gas in the second chamber 104 when the liquid level of the water in the second chamber 104 is lower than the set value, and the automatic exhaust device 100 can be turned off when the liquid level of the water in the second chamber 104 is higher than the set value.
The automatic exhaust device 100 in this embodiment can be automatically opened and closed according to the liquid level in the second cavity 104, so as to achieve automatic exhaust, work timely and accurately, and further ensure that the counter 200 is immersed in the water body.
Specifically, in the wet water meter of the present embodiment, in an operating state, tap water enters from the water inlet 102, flows through the first cavity 101 and then is discharged from the water outlet 103, and tap water may enter the second cavity 104 through the first cavity 101 so that the counter 200 is immersed in the water by the tap water to ensure the accuracy of the metering by the counter 200, but in the prior art, in order to ensure the amount of the tap water entering the second cavity 104 in the operating state so that the counter 200 can be immersed in the water, it is necessary to fill the water into the second cavity 104 during the production process, in order to reduce the amount of air located in the second cavity 104 during the production process, and after filling the water into the second cavity 104 during the production process, it is necessary to seal the second cavity 104 to prevent the leakage of the filling water of the second cavity 104 during the production and transportation processes, based on the irrigation process, an irrigation work post needs to be set in the production process, one counter is filled by one worker in one minute, the water consumption of each counter is about 0.05L, the water consumption of each counter is about 3L, the water consumption of each counter is 24L, the water consumption of each counter is 8 hours a day, the water consumption of each worker is 2160 ton, the water consumption of each ton of water is 0.931kWh, the water consumption of each station is 2010kWh, and the wage condition of the workers is considered, so that the irrigation process in the prior art is high in cost, is not beneficial to environmental protection and energy conservation, and cannot ensure that the irrigation is not leaked.
In the embodiment, the automatic exhaust device 100 is adopted, so that the irrigation process in the production of the wet water meter is cancelled in the production and processing process of the wet water meter, the labor cost, the equipment investment and the production field are saved, the production route is simplified, the operation time is saved, a large amount of production water and energy are saved, and the automatic exhaust device has very important market application prospect.
In addition, the counter 200 in this embodiment is a mechanical counter driven by a gear, the impeller 60 is mounted on the central rotating shaft 300, and the impeller 60 drives the counter 200 through the central rotating shaft 300 to perform flow measurement.
In a further implementation manner of this embodiment, the second chamber 104 is located above the first chamber 101, and the automatic air discharging device 100 is located above the second chamber 104.
The positions of the first chamber 101, the second chamber 104 and the automatic exhaust device 100 in this embodiment can ensure smooth exhaust of the gas.
In a further implementation manner of the present embodiment, the automatic air discharging device 100 is an automatic air discharging valve, the automatic air discharging valve includes a valve housing 110, a floating body 130, a linkage mechanism 150 and an air discharging assembly 160, the interior of the valve housing 110 has an accommodating space 140, the valve housing 110 is provided with an air inlet 120 and an air outlet 170, the air inlet 120 and the air outlet 170 are communicated with the accommodating space 140, the air discharging assembly 160 is disposed at the air outlet 170 for opening or closing the air outlet 170, the floating body 130 is connected with the air discharging assembly 160 through the linkage mechanism 150, and the floating body 130 can drive the air discharging assembly 160 to move through the linkage mechanism 150 so that the air outlet 170 is.
The operating principle of the automatic exhaust device 100 in the present embodiment is as follows: the second cavity 104 enters the accommodating space 140 through the air inlet 120, the liquid level of the water in the second cavity 104 is the same as the liquid level in the accommodating space 140, when the liquid level drops, the floating body 130 also drops, the floating body 130 drives the exhaust assembly 160 to open the air outlet 170 through the linkage mechanism 150 to exhaust the gas, when the liquid level rises, the floating body 130 also rises, and the floating body 130 drives the exhaust assembly 160 to close the air outlet 170 through the linkage mechanism 150.
The automatic air discharging device 100 in this embodiment has a simple structure and works accurately, and in addition, the present embodiment can adjust the liquid level for controlling the opening and closing of the air discharging assembly 160 by setting the position of the automatic air discharging device 100.
In a further implementation manner of this embodiment, a water flow rectifier is disposed in the first cavity 101, and a water flow channel is disposed on the water flow rectifier, and the water flow entering from the water inlet 102 can flow through the water flow channel of the water flow rectifier and be discharged from the water outlet 103.
In this embodiment, the water flow rectifier can rectify the flow of tap water entering from the water inlet 102 so that the flow can be suitable for metering, so as to improve the metering accuracy of the water meter.
In a further embodiment of this embodiment, a filter screen 30 is provided at the inlet of the flow straightener.
In this embodiment, a filter screen 30 is disposed at an inlet of the flow rectifier to filter the tap water entering the flow rectifier, so as to prevent impurities from entering the second cavity 104 and affecting the use of the counter 200.
In a further alternative embodiment of this embodiment, the flow straightener includes a first straightener 50 and a second straightener 400, the first straightener 50 is positioned adjacent the inlet 102, the second straightener 400 is positioned adjacent the outlet 103, and the impeller 60 is positioned between the first and second straighteners 50, 400.
The first rectifier 50 in this embodiment rectifies the tap water entering the first chamber 101 for the first time so that the entering tap water is suitable for metering, and after passing through the impeller 60, the tap water is rectified for the second time and then discharged through the water outlet 103.
In a further embodiment of the present embodiment, a flow adjusting mechanism 20 is disposed in the water flow channel 600 of the water flow rectifier.
The flow adjustment mechanism 20 in this embodiment can adjust the flow of tap water into the water flow channel 600, which can be used to adjust to compensate for errors when metering errors occur.
In a further embodiment of the present embodiment, the flow adjusting mechanism 20 comprises a sheet-shaped body, and the sheet-shaped body is rotatably disposed in the water flow channel 600 of the water flow rectifier.
The flow rate adjustment mechanism 20 in this embodiment is simple in structure, and flow rate adjustment is timely and effective.
Specifically, the sheet-shaped body in this embodiment is rotatably connected to the water flow rectifier through the rotating shaft 40, and the flow rate is controlled by adjusting the flow cross section of the water flow channel 600, when the sheet-shaped body is in a vertical state, the flow rate of the water flow channel 600 is at a maximum state, and when the sheet-shaped body is rotated by a certain angle, the flow cross section of the water flow channel 600 is reduced.
In a further implementation manner of this embodiment, the watch case 500 includes an upper case 70 and a lower case 10, the upper case 70 and the lower case 10 are connected, a sealing ring is disposed at the joint of the upper case 70 and the lower case 10, the upper case 70 is provided with the second cavity 104, and the lower case 10 is provided with the first cavity 101.
In a further embodiment of the present embodiment, a watch glass 90 is disposed at the top opening of the upper case 70, and a copper cover 80 is further disposed on the upper case 70, wherein the copper cover 80 is pressed on the watch glass 90 to position the watch glass 90 relative to the upper case 70.
The meter glass 90 in this embodiment can facilitate checking the flow rate of the counter 200, and in addition, the copper cover 80 can protect the meter glass 90, and the copper cover 80 can also have antirust performance.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A wet water meter, comprising:
the water meter comprises a meter shell, a water inlet and a water outlet, wherein the meter shell is provided with a first cavity and a second cavity, the water inlet and the water outlet are communicated with the first cavity, and the second cavity is communicated with the first cavity;
the impeller is arranged in the first cavity and can be driven to rotate by water flow;
the counter is arranged in the second cavity, and the impeller is connected with the counter and can drive the counter;
and the automatic exhaust device is connected with the watch case and is communicated with the second cavity, and when the liquid level of the water body in the second cavity is lower than a set value, the automatic exhaust device can be started to exhaust gas in the second cavity.
2. A wet water meter as set forth in claim 1, wherein said second chamber is located above said first chamber, and said automatic drain is located above said second chamber.
3. The wet water meter according to claim 1, wherein the automatic air discharging device is an automatic air discharging valve, the automatic air discharging valve includes a valve housing, a floating body, a linkage mechanism and an air discharging assembly, the valve housing has a receiving space therein, the valve housing is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated with the receiving space, the air discharging assembly is disposed at the air outlet for opening or closing the air outlet, the floating body is connected with the air discharging assembly through the linkage mechanism, and the floating body can drive the air discharging assembly to move through the linkage mechanism so as to enable the air outlet to be in an open or closed state.
4. A wet water meter as set forth in claim 1, wherein said first chamber has a flow straightener disposed therein, said flow straightener having a flow passage therethrough, whereby incoming water flow from said water inlet is able to pass through said flow passage of said flow straightener to exit said water outlet.
5. A wet water meter as claimed in claim 4, wherein a screen is provided at the inlet of said flow straightener.
6. A wet water meter as claimed in claim 4 or 5, wherein said flow straightener includes a first straightener positioned adjacent said water inlet and a second straightener positioned adjacent said water outlet, said impeller being positioned between said first and second rectifiers.
7. A wet water meter as set forth in claim 5, wherein said flow straightener includes a flow adjustment mechanism disposed in the flow passage.
8. A wet water meter as set forth in claim 6, wherein said flow adjustment mechanism includes a plate rotatably disposed in said flow passage of said flow straightener.
9. A wet water meter as set forth in claim 1, wherein said meter case includes an upper case and a lower case, said upper case and said lower case being joined and a seal ring being provided at a junction of said upper case and said lower case, said upper case being provided with said second chamber, said lower case being provided with said first chamber.
10. A wet water meter as set forth in claim 9, wherein a crystal is disposed at said top opening of said upper housing, and a copper cover is disposed on said crystal and is pressed against said crystal to position said crystal relative to said upper housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943972.XA CN112212933B (en) | 2020-09-10 | 2020-09-10 | Wet water meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943972.XA CN112212933B (en) | 2020-09-10 | 2020-09-10 | Wet water meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112212933A true CN112212933A (en) | 2021-01-12 |
| CN112212933B CN112212933B (en) | 2024-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010943972.XA Active CN112212933B (en) | 2020-09-10 | 2020-09-10 | Wet water meter |
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| CN (1) | CN112212933B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112991625A (en) * | 2021-05-19 | 2021-06-18 | 天津赛恩能源技术股份有限公司 | Matrix type valve control water meter system and valve control method thereof |
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| US20150137989A1 (en) * | 2012-05-25 | 2015-05-21 | Jae Sam Park | Electrical gas meter and apparatus and method for remotely transmitting gas usage |
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| CN108534859A (en) * | 2018-06-06 | 2018-09-14 | 深圳市捷先数码科技股份有限公司 | Highly sensitive photoelectric direct reading remote transmission water meter |
| CN209055160U (en) * | 2018-11-29 | 2019-07-02 | 宁波水立方仪表科技有限公司 | A kind of dry-type structure of water meter of diamagnetic interference |
| CN214224247U (en) * | 2020-09-10 | 2021-09-17 | 宁波水表(集团)股份有限公司 | Wet water meter |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4306454A (en) * | 1978-11-03 | 1981-12-22 | A/S N. Foss Electric | Method and an apparatus for metering a liquid flow |
| JPH0518797A (en) * | 1991-07-09 | 1993-01-26 | Ricoh Elemex Corp | Aqueduct meter for high temperature water |
| JPH0843153A (en) * | 1994-07-27 | 1996-02-16 | Toyo Keiki Kk | City water meter |
| JP2000171272A (en) * | 1998-12-04 | 2000-06-23 | Aichi Tokei Denki Co Ltd | Dry city water meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112991625A (en) * | 2021-05-19 | 2021-06-18 | 天津赛恩能源技术股份有限公司 | Matrix type valve control water meter system and valve control method thereof |
| CN112991625B (en) * | 2021-05-19 | 2021-07-27 | 天津赛恩能源技术股份有限公司 | Matrix type valve control water meter system and valve control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112212933B (en) | 2024-05-28 |
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