CN212482984U - High-efficient environmental protection remote monitoring domestic water monitoring devices - Google Patents

High-efficient environmental protection remote monitoring domestic water monitoring devices Download PDF

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Publication number
CN212482984U
CN212482984U CN202020864594.1U CN202020864594U CN212482984U CN 212482984 U CN212482984 U CN 212482984U CN 202020864594 U CN202020864594 U CN 202020864594U CN 212482984 U CN212482984 U CN 212482984U
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China
Prior art keywords
water
water tank
filter screen
tank
box
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Expired - Fee Related
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CN202020864594.1U
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Chinese (zh)
Inventor
张嘉陵
周小梅
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Sichuan Ruixing Environmental Protection Testing Co ltd
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Sichuan Ruixing Environmental Protection Testing Co ltd
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Abstract

The utility model discloses a high-efficient environmental protection remote monitoring domestic water monitoring devices, including water intaking device, controlling means, the water intaking device is including getting water tank, filter screen, scraping ground paste, balancing weight, putting the water tank for gain the quality of water sample, controlling means includes buffer box, air current chamber, gasbag, discharge, push pedal, push rod, handle for the degree of depth of remote control water intaking, the utility model discloses can the accurate control gain the degree of depth of quality of water sample, guarantee monitoring data's accuracy.

Description

High-efficient environmental protection remote monitoring domestic water monitoring devices
Technical Field
The utility model belongs to the technical field of the water source monitoring devices, concretely relates to high-efficient environmental protection remote monitoring domestic water monitoring devices.
Background
Water is a life source, water resources are protected scientifically and reasonably, and advanced technologies and equipment need to be invested.
The water resource monitoring is used for the water department to monitor water intake from the self-contained well, water inflow and outflow of a water plant, open channel flow, underground water level, water quality of a water source place, remote water selling management of water resources and the like. Plays an important role in effectively protecting water resources, reasonably utilizing water resources and strengthening social water-saving consciousness.
When an operator monitors a water source of domestic water, the water in the water source needs to be sampled and then placed into a detection device for specific data analysis, the operator grasps the depth of water taking each time when taking water in the conventional multilayer water taking device, the depth interval of water taking each time cannot be guaranteed due to reasons such as water refraction and visual deviation, and finally the data acquired by final detection is not accurate enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-efficient environmental protection remote monitoring domestic water monitoring devices for solve the technical problem that exists among the prior art, if: when an operator monitors a water source of domestic water, the water in the water source needs to be sampled and then placed into a detection device for specific data analysis, the operator grasps the depth of water taking each time when taking water in the conventional multilayer water taking device, the depth interval of water taking each time cannot be guaranteed due to reasons such as water refraction and visual deviation, and finally the data acquired by final detection is not accurate enough.
In order to achieve the above object, the utility model adopts the following technical scheme:
a high-efficiency environment-friendly remote monitoring device for domestic water is characterized by comprising a water taking device and a control device;
the water taking device comprises a water taking box, a filter screen, a scraping slurry, a balancing weight and a water placing box, wherein the water taking box is a hollow box body, the filter screen is arranged on one side edge of the water taking box, the scraping slurry is arranged at the center of the outer side of the filter screen on the side edge of the water taking box, the scraping slurry is driven by a motor to rotate, the balancing weight is arranged at the bottom end of the outer side of the water taking box, the balancing weight is detachably connected with the water taking box, the inside of the water placing box is divided into a plurality of water placing boxes by a plurality of partition plates, the water placing box is arranged on the inner side of the water taking box, the upper end and the lower end of the water placing box are fixedly connected with the upper end and the lower end of the water taking box, one side edge of the water placing box is fixedly connected;
the control device comprises a buffer box, an airflow cavity, an air bag, a gas collecting pipe, a push plate, a push rod and a handle, wherein a buffer sponge is filled in the buffer box, the buffer box is arranged at the top end of the water taking box, the airflow cavity is arranged at the top end of the inner part of the buffer box, the bottom end of the air bag is connected with the top end of the airflow cavity, the top end of the airflow cavity is connected with the top end of the gas collecting pipe through a hose, the push plate is arranged in the gas collecting pipe and closely attached to the inner wall of the gas collecting pipe, the bottom end of the push plate is connected with the push rod extending to the outside of the gas collecting pipe, and the other end of.
The water possibly contains a large amount of solid impurities, the impurities can aggravate the weight of the water taking tank, the impurities can move in the water taking tank, the gravity center of the water taking tank is caused to shake, the water taking tank can be caused to topple, an operator cannot easily recover the water taking tank, the side edge of one side of the water taking tank is provided with the filter screen, the filter screen can prevent too many impurities from entering the water taking tank, the stability of the device is improved, on the other hand, the trouble of cleaning the solid impurities in the water taking tank by the operator in the later period can be reduced, and the manual operation cost is reduced;
herbaceous plants such as algae can grow on the water bottom of a water source area, the herbaceous plants can be accumulated on the outer side of the filter screen to cause holes in the filter screen to be blocked, the scraping slurry is arranged at the center of the outer side of the filter screen on the side of the water taking tank and rotates under the driving of a motor, and the scraping slurry can scrape sundries of herbaceous plants or other solids adsorbed on the filter screen to avoid the filter screen from being blocked, so that the stable operation of the device is maintained;
the water taking tank is light in weight and can stop descending continuously after descending to a certain degree during water taking, so that the water taking tank cannot obtain a water quality sample at the bottom of a water source, the balancing weight is installed at the bottom end of the outer side of the water taking tank, the water taking tank can smoothly sink to the water bottom by means of the weight of the balancing weight, the comprehensiveness of monitoring data is guaranteed, the balancing weight is detachably connected with the water taking tank, an operator can select the balancing weight with proper weight according to the sinking depth, and the water taking tank is suitable for various field work requirements;
the inside of the water containing tank is divided into a plurality of water containing boxes by a plurality of partition plates, so that water quality samples at different depths can be separately stored to avoid mixing, and the comprehensiveness of later-stage detection data is ensured;
one end of each baffle is hinged with the edge of the side edge, close to the filter screen, of the water storage tank, the baffles can block a plurality of water inlets on the side edge of the water storage tank, when the water storage tank is placed into water, the water inlets are sealed by the baffles, the turnover shaft stays above the baffles, the telescopic rod extends to drive the turnover shaft to descend, the turnover shaft is in contact with the turnover rod at the uppermost end, the turnover shaft pushes the turnover shaft of the turnover rod to turn over, the turnover shaft turns over to expose the water inlets blocked by the turnover shaft, water can enter the water storage box through the exposed water inlets, the turnover shaft is made of rubber, when the telescopic rod extends to a certain degree, the turnover shaft begins to deform, and when the turnover shaft deforms to a certain degree, the turnover shaft and the turnover rod are separated from a mutual contact state, the turnover rod is reversely turned to be in mutual contact with the positioning groove under the action of gravity, the turnover shaft is driven by the telescopic rod to be in mutual contact with the turnover rod on the lower layer, the telescopic rod is extended at a constant speed, water at different depths can automatically enter the water storage tank, the sampling is rich and comprehensive, and the accuracy of detection data is ensured;
the bottom end of the air bag is connected with the top end of the air flow cavity, the top end of the air flow cavity is connected with the top end of the gas collecting pipe through a hose, when a water quality sample with a specific depth needs to be obtained, the volume of air in the air bag can be controlled by pushing or pulling the handle, so that the buoyancy force of water received by the control device is controlled, meanwhile, the length of the push rod entering the gas collecting pipe can be controlled to ensure that the water quality sample with the fixed depth is obtained, and the accuracy of a detection result is ensured.
Further, the rotation coverage area of the scraping slurry is close to the area of the filter screen.
Further, the water taking tank is made of firm and light materials.
Furthermore, a rubber pad is arranged on one side of the scraping slurry close to the filter screen.
Furthermore, the water containing boxes are equal in size.
Furthermore, a filtering membrane is arranged at the water inlet.
Further, the holes of the filtering membrane are smaller than the filtering net.
Furthermore, the top end of the water taking tank is connected with a traction rope.
Summary of working principle of the embodiment: the rotary coverage area of the scraping slurry is close to the area of the filter screen, so that the removal effect of the scraping slurry on herbaceous plants or aquatic weeds on the surface of the filter screen is ensured;
the water inlet is provided with a filtering membrane, so that solid impurities possibly existing in the water tank can be filtered by the filtering membrane, and the labor cost of the water containing box is reduced for cleaning at the later stage.
The utility model has the beneficial technical effects that: (1) the water possibly contains a large amount of solid impurities, the impurities can aggravate the weight of the water taking tank, the impurities can move in the water taking tank, the gravity center of the water taking tank is caused to shake, the water taking tank can be caused to topple, an operator cannot easily recover the water taking tank, the side edge of one side of the water taking tank is provided with the filter screen, the filter screen can prevent too many impurities from entering the water taking tank, the stability of the device is improved, on the other hand, the trouble of cleaning the solid impurities in the water taking tank by the operator in the later period can be reduced, and the manual operation cost is reduced;
(2) herbaceous plants such as algae can grow on the water bottom of a water source area, the herbaceous plants can be accumulated on the outer side of the filter screen to cause holes in the filter screen to be blocked, the scraping slurry is arranged at the center of the outer side of the filter screen on the side of the water taking tank and rotates under the driving of a motor, and the scraping slurry can scrape sundries of herbaceous plants or other solids adsorbed on the filter screen to avoid the filter screen from being blocked, so that the stable operation of the device is maintained;
(3) the water taking tank is light in weight and can stop descending continuously after descending to a certain degree during water taking, so that the water taking tank cannot obtain a water quality sample at the bottom of a water source, the balancing weight is installed at the bottom end of the outer side of the water taking tank, the water taking tank can smoothly sink to the water bottom by means of the weight of the balancing weight, the comprehensiveness of monitoring data is guaranteed, the balancing weight is detachably connected with the water taking tank, an operator can select the balancing weight with proper weight according to the sinking depth, and the water taking tank is suitable for various field work requirements;
(4) the inside of the water containing tank is divided into a plurality of water containing boxes by a plurality of partition plates, so that water quality samples at different depths can be separately stored to avoid mixing, and the comprehensiveness of later-stage detection data is ensured;
(5) one end of each baffle is hinged with the edge of the side edge, close to the filter screen, of the water storage tank, the baffles can block a plurality of water inlets on the side edge of the water storage tank, when the water storage tank is placed into water, the water inlets are sealed by the baffles, the turnover shaft stays above the baffles, the telescopic rod extends to drive the turnover shaft to descend, the turnover shaft is in contact with the turnover rod at the uppermost end, the turnover shaft pushes the turnover shaft of the turnover rod to turn over, the turnover shaft turns over to expose the water inlets blocked by the turnover shaft, water can enter the water storage box through the exposed water inlets, the turnover shaft is made of rubber, when the telescopic rod extends to a certain degree, the turnover shaft begins to deform, and when the turnover shaft deforms to a certain degree, the turnover shaft and the turnover rod are separated from a mutual contact state, the turnover rod is reversely turned to be in mutual contact with the positioning groove under the action of gravity, the turnover shaft is driven by the telescopic rod to be in mutual contact with the turnover rod on the lower layer, the telescopic rod is extended at a constant speed, water at different depths can automatically enter the water storage tank, the sampling is rich and comprehensive, and the accuracy of detection data is ensured;
(6) the bottom end of the air bag is connected with the top end of the air flow cavity, the top end of the air flow cavity is connected with the top end of the gas collecting pipe through a hose, when a water quality sample with a specific depth needs to be obtained, the volume of air in the air bag can be controlled by pushing or pulling the handle, so that the buoyancy force of water received by the control device is controlled, meanwhile, the length of the push rod entering the gas collecting pipe can be controlled to ensure that the water quality sample with the fixed depth is obtained, and the accuracy of a detection result is ensured.
Drawings
Fig. 1 is a front view of embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a water intake device according to embodiment 1 of the present invention.
Fig. 3 is a left side view of a water intake device according to embodiment 1 of the present invention.
Fig. 4 is a left side view of the layering device according to embodiment 1 of the present invention.
Fig. 5 is a schematic view showing a layered device structure according to embodiment 1 of the present invention.
In the figure: 1-taking a water tank, 2-a filter screen, 3-scraping slurry, 4-a balancing weight, 5-a water tank, 6-a water inlet, 7-a baffle, 8-a positioning groove, 9-a telescopic rod, 10-a turnover shaft, 11-a buffer box, 12-an airflow cavity, 13-an air bag, 14-a gas collecting pipe, 15-a push plate, 16-a push rod, 17-a handle and 18-a turnover rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to fig. 1-5 of the present invention, and it should be apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1, a high-efficiency environment-friendly remote monitoring domestic water monitoring device is characterized by comprising a water taking device, a layering device and a control device;
as shown in fig. 2 and fig. 3, the water intake device comprises a water intake tank 1, a filter screen 2, a scraping slurry 3, a balancing weight 4 and a water storage tank 5, the water taking tank 1 is a hollow tank body, the filter screen 2 is arranged on the side edge of one side of the water taking tank 1, the scraping slurry 3 is arranged at the center of the outer side of the filter screen 2 at the side of the water taking tank 1, the scraping slurry 3 is driven by a motor to rotate, the balancing weight 4 is arranged at the bottom end of the outer side of the water taking tank 1, the balancing weight 4 is detachably connected with the water taking tank 1, the inside of the water holding tank 5 is divided into a plurality of water holding boxes by a plurality of partition plates, the water holding tank 5 is arranged at the inner side of the water taking tank 1, the upper end and the lower end of the water placing box 5 are fixedly connected with the upper end and the lower end of the water taking box 1, the side edge of one side of the water placing box 5 is fixedly connected with the side edge of one side of the water taking box 1 far away from the filter screen 2, and the side edge of each water placing box close to the filter screen 2 is provided with a water inlet 6;
as shown in fig. 4 and 5, the layering device comprises baffles 7, a turning rod 18, a positioning groove 8, an expansion rod 9 and a turning shaft 10, one end of each baffle 7 is hinged with the edge of the side edge of the water tank 5 close to one side of the filter screen 2, the baffle 7 can block the water inlets 6 on the side of the water taking tank 1, the positioning grooves 8 are arranged at one end of the water placing tank 5 close to the filter screen 2, the bottom end of the other end of the baffle 7 far away from the hinged part of the baffle and the water containing tank 5 is arranged in the positioning groove 8, the end of the baffle 7 far away from the positioning groove 8 is fixedly connected with the turning rod 18, the top end of the telescopic rod 9 is connected with the top end inside the water taking tank 1, the bottom end of the telescopic rod 9 is connected with the turnover shaft 10, the turnover shaft 10 is made of rubber, and the turnover shaft 10 is in mutual contact with the turnover rod 18 in the moving process;
the control device comprises a buffer box 11, an airflow cavity 12, an air bag 13, a gas collecting pipe 14, a push plate 15, a push rod 16 and a handle 17, wherein buffer sponge is filled in the buffer box 11, the buffer box 11 is arranged at the top end of the water taking box 1, the airflow cavity 12 is arranged at the top end of the buffer box 11, the bottom end of the air bag 13 is connected with the top end of the airflow cavity 12, the top end of the airflow cavity 12 is connected with the top end of the gas collecting pipe 14 through a hose, the push plate is arranged in the gas collecting pipe 14, the push plate 15 is tightly attached to the inner wall of the gas collecting pipe 14, the bottom end of the push plate 15 is connected with the push rod 16 extending to the outside of the gas collecting pipe 14, and the other end of the push rod 16.
Example 1 working principle overview: the water may contain a large amount of solid impurities, which may aggravate the weight of the water intake box 1, the impurities may move in the water intake box 1, so that the center of gravity of the water intake box 1 may shake, the water intake box may topple, and it is difficult for an operator to recover the water intake box 1, the filter screen 2 is arranged on one side of the water intake box 1, the filter screen can prevent too many impurities from entering the water intake box 1, so that the stability of the device is improved, on the other hand, the trouble of cleaning the solid impurities in the water intake box 1 by the operator at a later stage can be reduced, and the manual operation cost is reduced;
herbaceous plants such as algae may grow on the water bottom of the water source, the herbaceous plants may be accumulated on the outer side of the filter screen 2 to cause the holes on the filter screen 2 to be blocked, the scraping slurry 3 is installed at the center of the outer side of the filter screen 2 on the side of the water taking tank 1, the scraping slurry 3 is driven by a motor to rotate, and the scraping slurry 3 can scrape the herbaceous plants or other solid impurities adsorbed on the filter screen 2 to avoid the filter screen 2 from being blocked, so that the stable operation of the device is maintained;
the water taking tank 1 is light in weight and can stop descending continuously after descending to a certain degree in water taking, so that the water taking tank 1 cannot obtain a water quality sample at the bottom of a water source, the balancing weight 4 is installed at the bottom end of the outer side of the water taking tank 1, the water taking tank 1 can smoothly sink to the water bottom by means of the weight of the balancing weight 4, the comprehensiveness of monitoring data is guaranteed, the balancing weight 4 is detachably connected with the water taking tank 1, an operator can select the balancing weight 4 with proper weight according to the sinking depth required, and the water taking tank is suitable for various field work requirements;
the inside of the water containing tank 5 is divided into a plurality of water containing boxes by a plurality of partition plates, so that water quality samples at different depths can be separately stored to avoid mixing, and the comprehensiveness of later-stage detection data is ensured;
one end of each of the baffles 7 is hinged to the edge of the side edge, close to the filter screen 2, of the water storage tank 5, the baffles 7 can block the water inlets 6 on the side edge of the water storage tank 1, when the water storage tank 1 is placed into water, the water inlets 6 are sealed by the baffles 7, the turnover shaft 10 stays above the baffles 7, the telescopic rod 9 extends to drive the turnover shaft 10 to descend, the turnover shaft 10 is in contact with the turnover rod 18 at the top end, the turnover shaft 10 pushes the turnover rod 18 to turn over, the turnover rod 18 turns over to expose the blocked water inlets 6, water can enter the water storage box through the exposed water inlets 6, the turnover shaft 10 is made of rubber, and when the telescopic rod 9 extends to a certain degree, the turnover shaft 10 begins to deform, when the deformation of the turnover shaft 10 reaches a certain degree, the turnover shaft 10 and the turnover rod 18 are separated from a mutual contact state, the turnover rod 18 is reversely turned over under the action of gravity to be in mutual contact with the positioning groove 8, the turnover shaft 10 is driven by the telescopic rod 9 to be in mutual contact with the turnover rod 18 at the lower layer, the telescopic rod 9 is extended at a constant speed, water at different depths can automatically enter the water storage tank, the sampling is rich and comprehensive, and the accuracy of detection data is ensured;
the bottom end of the air bag 13 is connected with the top end of the air flow chamber 12, the top end of the air flow chamber 12 is connected with the top end of the gas collecting pipe 14 through a hose, when a water quality sample with a specific depth needs to be obtained, the volume of air in the air bag 13 can be controlled by pushing or pulling the handle 17, so that the buoyancy force of water received by the device is controlled, meanwhile, the length of the push rod 16 entering the gas collecting pipe 14 can be controlled to ensure that the water quality sample with a fixed depth is obtained, and the accuracy of a detection result is ensured.
Example 2:
on the basis of the embodiment 1, further, the rotation coverage area of the scraping slurry 3 is close to the area of the filter screen 2.
Further, the water taking tank 1 is made of a firm and light material.
Further, a rubber pad is arranged on one side of the scraping slurry 3 close to the filter screen 2.
Furthermore, the water containing boxes are equal in size.
Further, a filtering membrane is arranged at the water inlet 6.
Further, the holes of the filtering membrane are smaller than the filtering net 2.
Furthermore, the top end of the water taking tank 1 is connected with a traction rope.
Example 2 working principle overview: the rotary coverage area of the scraping slurry 3 is close to the area of the filter screen 2, so that the removal effect of the scraping slurry 3 on herbaceous plants or aquatic plants on the surface of the filter screen is ensured;
6 departments of water inlet are provided with filtration membrane, let probably exist in the water tank 1 of getting and can be fallen by filtration membrane filters, reduces the later stage clearance put the cost of labor of water box.
In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Claims (8)

1. A high-efficiency environment-friendly remote monitoring device for domestic water is characterized by comprising a water taking device and a control device;
the water intaking device is including getting water tank (1), filter screen (2), scraping thick liquids (3), balancing weight (4), putting water tank (5), it is hollow box to get water tank (1), one side of getting water tank (1) does filter screen (2), scrape ground paste (3) and install get water tank (1) side filter screen (2) outside center department, it rotates under the drive of motor to scrape ground paste (3), install balancing weight (4) get water tank (1) outside bottom, balancing weight (4) with get water tank (1) and can dismantle the connection, it cuts apart into a plurality of water boxes of putting by a plurality of baffles to put water tank (5) inside, it installs to put water tank (5) get water tank (1) inboard, put the upper and lower extreme of water tank (5) with the upper and lower end rigid coupling of getting water tank (1), the one side of putting water tank (5) with get water tank (1) and keep away from a water tank (1) of filter screen (2) The side edges of the water containing boxes are fixedly connected, and the side edge of each water containing box, which is close to the filter screen (2), is provided with a water inlet (6);
the control device comprises a buffer box (11), an airflow cavity (12), an air bag (13), a gas collecting pipe (14), a push plate (15), a push rod (16) and a handle (17), the buffer box (11) is filled with buffer sponge, the buffer box (11) is arranged at the top end of the water taking box (1), the top end in the buffer box (11) is provided with the airflow cavity (12), the bottom end of the air bag (13) is connected with the top end of the airflow cavity (12), the top end of the airflow cavity (12) is connected with the top end of the gas collecting pipe (14) through a hose, the push plate is arranged in the gas collecting pipe (14), the push plate (15) is tightly attached to the inner wall of the gas collecting pipe (14), the bottom end of the push plate (15) is connected with the push rod (16) extending to the outside of the gas collecting pipe (14), and the other end of the push rod (16) is connected with the handle (17).
2. An efficient and environmentally friendly remote monitoring domestic water monitoring device according to claim 1, wherein the scraping slurry (3) has a rotating coverage area close to the area of the filter screen (2).
3. An efficient and environmentally friendly remote monitoring domestic water monitoring device according to claim 1, wherein said water intake tank (1) is a strong and lightweight material.
4. The high-efficiency environment-friendly remote monitoring device for domestic water according to claim 1, wherein a rubber pad is arranged on one side of the scraping slurry (3) close to the filter screen (2).
5. The apparatus as claimed in claim 1, wherein the water containing boxes are of the same size.
6. An efficient environment-friendly remote monitoring domestic water monitoring device according to claim 5, wherein a filtering membrane is arranged at the water inlet (6).
7. An efficient and environmentally friendly remote monitoring domestic water monitoring device according to claim 6, wherein the holes of the filtering membrane are smaller than the filtering net (2).
8. The high-efficiency environment-friendly remote monitoring domestic water monitoring device as claimed in claim 7, wherein a hauling rope is connected to the top end of the water taking tank (1).
CN202020864594.1U 2020-05-21 2020-05-21 High-efficient environmental protection remote monitoring domestic water monitoring devices Expired - Fee Related CN212482984U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020864594.1U CN212482984U (en) 2020-05-21 2020-05-21 High-efficient environmental protection remote monitoring domestic water monitoring devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020864594.1U CN212482984U (en) 2020-05-21 2020-05-21 High-efficient environmental protection remote monitoring domestic water monitoring devices

Publications (1)

Publication Number Publication Date
CN212482984U true CN212482984U (en) 2021-02-05

Family

ID=74411026

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020864594.1U Expired - Fee Related CN212482984U (en) 2020-05-21 2020-05-21 High-efficient environmental protection remote monitoring domestic water monitoring devices

Country Status (1)

Country Link
CN (1) CN212482984U (en)

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Granted publication date: 20210205

Termination date: 20210521