CN113280896B - Water meter sealing performance detection device and method - Google Patents
Water meter sealing performance detection device and method Download PDFInfo
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- CN113280896B CN113280896B CN202110691545.1A CN202110691545A CN113280896B CN 113280896 B CN113280896 B CN 113280896B CN 202110691545 A CN202110691545 A CN 202110691545A CN 113280896 B CN113280896 B CN 113280896B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 242
- 238000007789 sealing Methods 0.000 title claims abstract description 179
- 238000001514 detection method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000011521 glass Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000007599 discharging Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a device and a method for detecting water meter sealing performance, wherein the device comprises a sealing component, a water adding component and an observation component; the water meter comprises a sealing assembly, a water adding assembly and an observation assembly, wherein the sealing assembly is used for sealing a water pipe and the water meter, the water adding assembly is used for adding water into the sealing assembly, and the observation assembly is used for observing whether the water meter is good in sealing performance. Through the matching of the sealing assembly, the water adding assembly and the observation assembly, the sealing performance of the installed water meter can be tested, and whether the sealing performance of the water meter is good or not can be judged visually; a sliding sleeve and a positioning needle are added on the U-shaped glass tube, so that a user can be assisted in mastering the position of sealing liquid in the U-shaped glass tube; the water meter sealing device has the advantages that the number of the inner rings is multiple, the rubber sealing rings with different thicknesses are bonded in the inner sides of the inner rings, the rubber sealing rings with different thicknesses are matched with water pipes with different diameters, the water meters connected to the water pipes with different diameters can be subjected to sealing detection, and the applicability of the water meter sealing device is wider.
Description
Technical Field
The invention relates to the technical field of water meters, in particular to a device and a method for detecting water meter sealing performance.
Background
Water meters, which are meters for measuring water flow, mostly measure the accumulated flow of water, and are generally classified into a positive displacement water meter and a velocity water meter.
After a general water meter is installed on a water pipe, the tightness of the water meter is difficult to visually detect, and whether the tightness is good or not is often judged manually, so that misjudgment is easy. Therefore, a device and a method for detecting the water meter tightness are provided.
Disclosure of Invention
The invention aims to provide a device and a method for detecting water meter tightness so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a water meter sealing performance detection device, comprising: the device comprises a sealing assembly, a water adding assembly and an observation assembly;
the water meter comprises a sealing assembly, an observation assembly, a water adding assembly, a water meter and a water outlet assembly, wherein the sealing assembly is used for sealing a water pipe and the water meter, the water adding assembly is used for adding water into the sealing assembly, the observation assembly is used for observing whether the water meter is good in sealing performance or not, the water adding assembly is installed on the sealing assembly, and the observation assembly is installed on the sealing assembly;
the sealing assembly comprises a first shell, a second shell, a fixed half ring, a sealing ring and an inner ring, wherein the first shell is hinged to the second shell, water pipe holes are formed in the centers of two sides of the first shell and the second shell, the fixed half ring is fixedly connected to two sides of the first shell and two sides of the second shell, one end of the outer side of the sealing ring is in threaded connection with the inner side of the fixed half ring, and the inner side of the sealing ring is in threaded connection with the outer side of the inner ring.
By adopting the technical scheme, the sealing assembly surrounds the sealed water meter and the water pipes on the two sides of the sealed water meter, water is added into the sealing assembly through the water adding assembly, and whether the water meter sealing performance has a problem or not is judged through the observation assembly.
Preferably, a first sealing plate is fixedly connected to the first shell, a second sealing plate is fixedly connected to the second shell, sealing bolts are installed on the first sealing plate and the second sealing plate in a threaded mode, and a sealing rubber plate is bonded to the first sealing plate.
Through adopting above-mentioned technical scheme, sealing bolt is used for fastening first closing plate and second closing plate, and the sealing rubber board is used for strengthening the leakproofness.
Preferably, a rubber sleeve is bonded on the outer side of the sealing ring.
Through adopting above-mentioned technical scheme, supplementary rotation sealing ring.
Preferably, a ring body is fixedly connected to the outer side of the inner ring, and a rubber sealing ring is bonded to the inner side of the inner ring.
Through adopting above-mentioned technical scheme, rubber seal ring and water pipe closely laminate, reinforcing seal assembly's leakproofness.
Preferably, the water adding assembly comprises a water tank and a water pump, one side of the water tank is communicated with a water suction pipe, the water tank is communicated with the water pump through the water suction pipe, the water outlet end of the water pump is communicated with a water discharge pipe, and the water discharge pipe is communicated with the second shell.
Through adopting above-mentioned technical scheme, through on-off control water pump start-up, absorb the inside water of water tank, discharge into between first casing and the second casing through the drain pipe.
Preferably, a tank cover is installed on the water tank, one side of the water tank is communicated with a water outlet pipe, and a valve is installed on the water outlet pipe.
Through adopting above-mentioned technical scheme, the outlet pipe is used for discharging the water in the water tank.
Preferably, a switch is installed on the water tank and electrically connected with the water pump.
By adopting the technical scheme, the water pump is controlled to be started and closed through the switch.
Preferably, the observation assembly comprises an L-shaped glass tube, a U-shaped glass tube, a sliding sleeve, a positioning needle and a rotary cover, the L-shaped glass tube is communicated with the first shell, the L-shaped glass tube is communicated with the U-shaped glass tube, the rotary cover is in threaded connection with the U-shaped glass tube, the U-shaped glass tube is far away from one end of the L-shaped glass tube, the sliding sleeve is in sliding connection with the U-shaped glass tube, and the positioning needle is fixedly connected to the sliding sleeve.
By adopting the technical scheme, whether the water meter tightness has a problem or not can be visually judged.
Preferably, the U-shaped glass tube is provided with scale marks.
By adopting the technical scheme, the user is assisted in confirming the position of the sealing liquid.
The invention also provides a water meter sealing performance detection method, which comprises the following steps:
s1, a first shell and a second shell are clamped and sleeved on water pipes on two sides of a water meter, and a first sealing plate and a second sealing plate are tightly fixed through sealing bolts;
s2, rotating the sealing ring to enable one end of the sealing ring to be fixed on the inner side of the fixed semi-ring and preliminarily sheathing the water pipes on the two sides of the water meter;
s3, rotatably installing the inner ring, fixing one end of the inner ring at the inner side of the sealing ring, and enabling the rubber sealing ring to be tightly attached to water pipes on two sides of the water meter so as to prevent water leakage;
s4, a rotary cover is turned on, sealing liquid is added into the U-shaped glass tube, a water pump is controlled to be started through a switch, water in the water tank is sucked and discharged between the first shell and the second shell through a water discharging pipe until the water is filled between the first shell and the second shell, but water flow does not enter the L-shaped glass tube;
and S5, sliding the sliding sleeve to enable the positioning needle to point to the liquid level of the sealing liquid at the moment, closing the switch, standing for a period of time, observing the liquid level of the sealing liquid, wherein if the liquid level of the sealing liquid on the right side is lower than the position pointed by the positioning needle, the sealing performance of the water meter is poor, and if the liquid level of the sealing liquid is the same as the position pointed by the positioning needle, the sealing performance of the water meter is good.
Compared with the prior art, the invention has the beneficial effects that:
1. by the matching of the sealing assembly, the water adding assembly and the observation assembly in the water meter tightness detection device, the tightness of the installed water meter can be tested, and whether the water meter tightness is good or not can be judged visually;
2. a sliding sleeve and a positioning needle are added on the U-shaped glass tube, so that a user can be assisted in mastering the position of sealing liquid in the U-shaped glass tube;
3. the water meter sealing device has the advantages that the number of the inner rings is multiple, the rubber sealing rings with different thicknesses are bonded in the inner sides of the inner rings, the rubber sealing rings with different thicknesses are matched with water pipes with different diameters, the water meters connected to the water pipes with different diameters can be subjected to sealing detection, and the applicability of the water meter sealing device is wider.
Drawings
FIG. 1 is a perspective view of a water meter sealing performance detecting device according to the present invention;
FIG. 2 is a front view of the water meter sealing performance detecting device of the present invention;
FIG. 3 is a side view of the water meter sealing test device of the present invention;
FIG. 4 is a schematic structural diagram of the water meter sealing performance detecting device according to the present invention;
FIG. 5 is an enlarged view of the structure of area A in FIG. 4 according to the present invention;
FIG. 6 is a perspective view of the sliding sleeve of the present invention;
fig. 7 is a flow chart of the method for detecting water meter sealing performance according to the present invention.
In the figure: 1. a seal assembly; 2. a water adding component; 3. an observation component; 11. a first housing; 12. a second housing; 111. a first sealing plate; 121. a second sealing plate; 13. a seal bolt; 14. sealing the rubber plate; 15. a water pipe hole; 16. a stationary half ring; 17. a seal ring; 18. a rubber sleeve; 19. an inner ring; 191. a ring body; 192. a rubber seal ring; 21. a water tank; 22. a suction pipe; 23. a water pump; 24. a drain pipe; 25. a switch; 211. a box cover; 212. a water outlet pipe; 213. a valve; 31. an L-shaped glass tube; 32. a U-shaped glass tube; 33. a sliding sleeve; 34. a positioning pin; 35. screwing a cover; 36. scale lines are marked.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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. 1-7, the present invention provides a technical solution:
a water meter sealing performance detection device, comprising: the device comprises a sealing component 1, a water adding component 2 and an observation component 3;
the water adding assembly 2 is used for adding water into the sealing assembly 1, the observation assembly 3 is used for observing whether the water meter has good sealing performance or not, the water adding assembly 2 is installed on the sealing assembly 1, and the observation assembly 3 is installed on the sealing assembly 1;
in order to seal the water pipes on the two sides of the water meter and the water meter, a sealing component 1 is arranged, wherein the sealing component 1 comprises a first shell 11, a second shell 12, a fixed half ring 16, a sealing ring 17 and an inner ring 19, the first shell 11 is hinged to the second shell 12, the centers of the two sides of the first shell 11 and the second shell 12 are respectively provided with a water pipe hole 15, the two sides of the first shell 11 and the second shell 12 are respectively and fixedly connected with the fixed half ring 16, one end of the outer side of the sealing ring 17 is in threaded connection with the inner side of the fixed half ring 16, and the inner side of the sealing ring 17 is in threaded connection with the outer side of the inner ring 19.
In order to enhance the sealing performance between the first casing 11 and the second casing 12, a first sealing plate 111 is fixedly connected to the first casing 11, a second sealing plate 121 is fixedly connected to the second casing 12, sealing bolts 13 are screwed on the first sealing plate 111 and the second sealing plate 121, and a sealing rubber plate 14 is bonded on the first sealing plate 111. The seal bolt 13 is used to fasten the first seal plate 111 and the second seal plate 121, and the seal rubber plate 14 is used to enhance the sealing property.
In order to facilitate the rotation of the sealing ring 17 by the user, a rubber sleeve 18 is bonded to the outside of the sealing ring 17.
In order to make the sealing assembly 1 seal the water pipes on both sides of the water meter, a ring body 191 is fixedly connected to the outer side of the inner ring 19, and a rubber sealing ring 192 is bonded to the inner side of the inner ring 19.
In order to conveniently add water to the inner side of the sealing assembly 1, the water adding assembly 2 is arranged, the water adding assembly 2 comprises a water tank 21 and a water pump 23, one side of the water tank 21 is communicated with a water suction pipe 22, the water tank 21 is communicated with the water pump 23 through the water suction pipe 22, the water outlet end of the water pump 23 is communicated with a water discharge pipe 24, and the water discharge pipe 24 is communicated with the second shell 12. The water pump 23 is controlled to be activated by the switch 25, and water in the water tank 21 is sucked and discharged between the first casing 11 and the second casing 12 through the water discharge pipe 24.
In order to discharge the wastewater in the water tank 21 conveniently, a tank cover 211 is installed on the water tank 21, one side of the water tank 21 is communicated with a water outlet pipe 212, and a valve 213 is installed on the water outlet pipe 212.
In order to control the on-off of the water pump 23, a switch 25 is installed on the water tank 21, and the switch 25 is electrically connected with the water pump 23.
In order to judge whether the water meter sealing performance has problems visually, the observation assembly 3 is arranged, the observation assembly 3 comprises an L-shaped glass tube 31, a U-shaped glass tube 32, a sliding sleeve 33, a positioning needle 34 and a rotary cover 35, the L-shaped glass tube 31 is communicated with the first shell 11, the L-shaped glass tube 31 is communicated with the U-shaped glass tube 32, the rotary cover 35 is in threaded connection with one end, far away from the L-shaped glass tube 31, of the U-shaped glass tube 32, the sliding sleeve 33 is in sliding connection with the U-shaped glass tube 32, and the positioning needle 34 is fixedly connected to the sliding sleeve 33.
Meanwhile, the number of the inner rings 19 is multiple, the rubber sealing rings 192 with different thicknesses are bonded in the inner rings 19, and the rubber sealing rings 192 with different thicknesses are matched with water pipes with different diameters, so that the water meters connected to the water pipes with different diameters can be subjected to tightness detection, and the applicability of the water meters is wider.
To assist the user in confirming the position of the sealing liquid, the U-shaped glass tube 32 is provided with scale marks 36.
The invention also provides a water meter sealing performance detection method, which comprises the following steps:
s1, clamping and sleeving a first shell 11 and a second shell 12 on water pipes on two sides of a water meter, and tightly fixing a first sealing plate 111 and a second sealing plate 121 through a sealing bolt 13;
s2, rotating the sealing ring 17 to enable one end to be fixed on the inner side of the fixed semi-ring 16 and preliminarily sheathing the water pipes on the two sides of the water meter;
s3, rotatably installing the inner ring 19, fixing one end of the inner ring at the inner side of the sealing ring 17, and enabling the rubber sealing ring 192 to be tightly attached to the water pipes at the two sides of the water meter so as to prevent water leakage;
s4, the rotary cover 35 is turned on, sealing liquid is added into the U-shaped glass tube 32, the switch 25 controls the water pump 23 to be started, water in the water tank 21 is sucked and drained between the first shell 11 and the second shell 12 through the drain pipe 24 until the water is filled between the first shell 11 and the second shell 12, but water flow does not enter the L-shaped glass tube 31;
s5, sliding the sliding sleeve 33 to enable the positioning needle 34 to point to the liquid level of the sealing liquid at the moment, closing the switch 25, standing for a period of time, and observing the liquid level of the sealing liquid, wherein if the liquid level of the sealing liquid on the right side is lower than the position pointed by the positioning needle 34, the sealing performance of the water meter is poor, and if the liquid level of the sealing liquid is the same as the position pointed by the positioning needle 34, the sealing performance of the water meter is good.
The structure principle is as follows: seal assembly 1 surrounds sealed water gauge and both sides water pipe, adds water to seal assembly 1 in through adding water subassembly 2, judges whether the water gauge leakproofness has the problem through observation subassembly 3. The first shell 11 and the second shell 12 are clamped and sleeved on the water pipes at two sides of the water meter, and the first sealing plate 111 and the second sealing plate 121 are tightly fixed through the sealing bolt 13; rotating the sealing ring 17 to fix one end of the sealing ring on the inner side of the fixed semi-ring 16 to initially sleeve the water pipes on two sides of the water meter; the inner ring 19 is rotatably mounted, one end of the inner ring is fixed at the inner side of the sealing ring 17, and the rubber sealing ring 192 is tightly attached to the water pipes at the two sides of the water meter to prevent water leakage; turning on the rotary cover 35, adding sealing liquid into the U-shaped glass tube 32, controlling the water pump 23 to start through the switch 25, sucking water in the water tank 21, and discharging the water into the space between the first shell 11 and the second shell 12 through the water discharge pipe 24 until the space between the first shell 11 and the second shell 12 is filled with the water, but the water flow does not enter the L-shaped glass tube 31; and sliding the sliding sleeve 33 to enable the positioning needle 34 to point to the liquid level of the sealing liquid at the moment, closing the switch 25, standing for a period of time, observing the liquid level of the sealing liquid, and if the liquid level of the sealing liquid on the right side is lower than the position pointed by the positioning needle 34, the sealing performance of the water meter is poor, and if the liquid level of the sealing liquid is the same as the position pointed by the positioning needle 34, the sealing performance of the water meter is good.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a water gauge leakproofness detection device which characterized in that includes: the device comprises a sealing assembly (1), a water adding assembly (2) and an observation assembly (3);
the water meter sealing device comprises a sealing assembly (1), a water adding assembly (2), an observation assembly (3), a water adding assembly (2) and a water meter, wherein the sealing assembly (1) is used for sealing a water pipe and the water meter, the water adding assembly (2) is used for adding water into the sealing assembly (1), the observation assembly (3) is used for observing whether the water meter is good in sealing performance, the water adding assembly (2) is installed on the sealing assembly (1), and the observation assembly (3) is installed on the sealing assembly (1);
the sealing assembly (1) comprises a first shell (11), a second shell (12), a fixed half ring (16), a sealing ring (17) and an inner ring (19), wherein the first shell (11) is hinged to the second shell (12), the centers of two sides of the first shell (11) and the second shell (12) are respectively provided with a water pipe hole (15), the two sides of the first shell (11) and the second shell (12) are respectively fixedly connected with the fixed half ring (16), one end of the outer side of the sealing ring (17) is in threaded connection with the inner side of the fixed half ring (16), and the inner side of the sealing ring (17) is in threaded connection with the outer side of the inner ring (19);
the water adding assembly (2) comprises a water tank (21) and a water pump (23), a water suction pipe (22) is communicated with one side of the water tank (21), the water tank (21) is communicated with the water pump (23) through the water suction pipe (22), a water outlet end of the water pump (23) is communicated with a water drainage pipe (24), and the water drainage pipe (24) is communicated with the second shell (12);
wherein, survey subassembly (3) including L type glass pipe (31), U type glass pipe (32), sliding sleeve (33), pilot pin (34) and spiral cover (35), L type glass pipe (31) communicate in on first casing (11), L type glass pipe (31) with U type glass pipe (32) are linked together, spiral cover (35) threaded connection in U type glass pipe (32) are kept away from the one end of L type glass pipe (31), sliding sleeve (33) sliding connection in on U type glass pipe (32), pilot pin (34) fixed connection in on sliding sleeve (33).
2. The water meter sealing performance detecting device of claim 1, wherein: the sealing structure is characterized in that a first sealing plate (111) is fixedly connected to the first shell (11), a second sealing plate (121) is fixedly connected to the second shell (12), a sealing bolt (13) is installed on the first sealing plate (111) and the second sealing plate (121) in a threaded mode, and a sealing rubber plate (14) is bonded to the first sealing plate (111).
3. The water meter sealing performance detecting device of claim 2, wherein: and a rubber sleeve (18) is bonded on the outer side of the sealing ring (17).
4. The water meter sealing performance detecting device of claim 3, wherein: the outer side of the inner ring (19) is fixedly connected with a ring body (191), and the inner side of the inner ring (19) is bonded with a rubber sealing ring (192).
5. The water meter sealing performance detecting device of claim 4, wherein: install case lid (211) on water tank (21), one side intercommunication of water tank (21) has outlet pipe (212), install valve (213) on outlet pipe (212).
6. The water meter sealing performance detecting device of claim 5, wherein: install switch (25) on water tank (21), switch (25) with water pump (23) electric connection.
7. The water meter sealing performance detecting device of claim 6, wherein: and scale marks (36) are arranged on the U-shaped glass tube (32).
8. A method for detecting water meter tightness is characterized in that: the water meter sealing performance detecting device of claim 7, comprising the steps of:
s1, a first shell (11) and a second shell (12) are clamped and sleeved on water pipes on two sides of a water meter, and a first sealing plate (111) and a second sealing plate (121) are tightly fixed through sealing bolts (13);
s2, rotating a sealing ring (17) to enable one end of the sealing ring to be fixed on the inner side of the fixed semi-ring (16) to initially sleeve the water pipes on the two sides of the water meter;
s3, rotatably installing an inner ring (19), fixing one end of the inner ring at the inner side of the sealing ring (17), and enabling the rubber sealing ring (192) to be tightly attached to water pipes at two sides of the water meter to prevent water leakage;
s4, a rotary cover (35) is turned on, sealing liquid is added into the U-shaped glass tube (32), a water pump (23) is controlled to be started through a switch (25), water in the water tank (21) is sucked and discharged between the first shell (11) and the second shell (12) through a water discharge pipe (24) until the water is filled between the first shell (11) and the second shell (12), but water flow does not enter the L-shaped glass tube (31);
s5, sliding the sliding sleeve (33) to enable the positioning needle (34) to point to the liquid level of the sealing liquid at the moment, closing the switch (25), standing for a period of time, observing the liquid level of the sealing liquid, wherein if the liquid level of the sealing liquid on the right side is lower than the position pointed by the positioning needle (34), the sealing performance of the water meter is poor, and if the liquid level of the sealing liquid is the same as the position pointed by the positioning needle (34), the sealing performance of the water meter is good.
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| CN202110691545.1A CN113280896B (en) | 2021-06-22 | 2021-06-22 | Water meter sealing performance detection device and method |
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| CN202110691545.1A CN113280896B (en) | 2021-06-22 | 2021-06-22 | Water meter sealing performance detection device and method |
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Application publication date: 20210820 Assignee: NINGBO DONGHAI INSTRUMENT WATERWAY CO.,LTD. Assignor: Ningbo Donghai Group Corp. Contract record no.: X2023330000872 Denomination of invention: A water meter sealing detection device and method Granted publication date: 20221125 License type: Exclusive License Record date: 20231123 |
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