CN216621872U - Automatically cleaning quality of water sampling device - Google Patents
Automatically cleaning quality of water sampling device Download PDFInfo
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- CN216621872U CN216621872U CN202123125067.2U CN202123125067U CN216621872U CN 216621872 U CN216621872 U CN 216621872U CN 202123125067 U CN202123125067 U CN 202123125067U CN 216621872 U CN216621872 U CN 216621872U
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Abstract
The utility model discloses a self-cleaning water quality sampling device, which relates to the field of water quality sampling devices and comprises a sampling barrel and a mounting plate, wherein a fixing plate is mounted on the inner side of the sampling barrel, a limiting rod is connected to the inner side of the fixing plate, a floating plate is fixed below the limiting rod, a top cover is arranged above the sampling barrel, a clamping plate is connected to the right side of the top cover, a fixing spring is arranged on the right side of the clamping plate, a cross rod is connected to the upper side of the top cover, an adjusting rod is arranged on the right side of the cross rod, an adjusting threaded sleeve is connected to the lower side of the adjusting rod, a cleaning block is fixed below the adjusting threaded sleeve, a water spray pipe is mounted in the middle of the top cover, a water pump is connected to the rear side of the water spray pipe, a water tank is arranged on the right side of the water pump, and a mounting bolt is connected to the outer side of the water tank; this quality of water sampling device makes things convenient for self-cleaning device inner wall after using, improves work efficiency, and this quality of water sampling device is convenient for adjust use length when using, the regional darker water of being convenient for people's sample.
Description
Technical Field
The utility model relates to the technical field of water quality sampling devices, in particular to a self-cleaning water quality sampling device.
Background
Along with the development of science and technology, people's standard of living is improving gradually, but the pollution that comes with is also serious gradually, including water quality pollution, people need carry out the sampling analysis to polluting the water matter to solve the pollution source, and when sampling water resource, need use a quality of water sampling device to operate.
However, after the existing water quality sampling device is used, scales can be remained on the inner wall of the device, if the device cannot be cleaned in time, the next use can influence the sample detection structure, but if the manual cleaning device is used, time and labor are wasted, the working efficiency can be influenced, the water quality sampling device is inconvenient to use according to the length of the required adjusting device when in use, the water quality sampling device is inconvenient to take a water quality sample with a deep area, and the practicability is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a self-cleaning water quality sampling device to solve the problems that the existing water quality sampling device proposed in the background technology is inconvenient to self-clean and adjust the using length.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a automatically cleaning quality of water sampling device, includes sampling bucket and mounting panel, the fixed plate is installed to the inboard of sampling bucket, and the inboard of fixed plate is connected with the gag lever post to the below of gag lever post is fixed with the kickboard, the top of sampling bucket is provided with the top cap, and the right side of top cap is connected with the cardboard to the right side of cardboard is provided with fixed spring, the top of top cap is connected with the horizontal pole, and the right side of horizontal pole is provided with the regulation pole, the below of adjusting the pole is connected with the regulation swivel nut, and the below of adjusting the swivel nut is fixed with the cleaning block, the mid-mounting of top cap has the spray pipe, and the rear of spray pipe is connected with the water pump, the right side of water pump is provided with the water tank, and the outside of water tank is connected with mounting bolt.
Preferably, the mounting panel is fixed in the left side of sampling bucket, and the top of mounting panel installs automatic flexible push rod, the top of automatic flexible push rod is fixed with the arm-tie, and the outside of arm-tie is provided with the slipmat.
Preferably, be sliding connection between fixed plate and the gag lever post, and be fixed connection between gag lever post and the kickboard to the kickboard is the design of EVA material layer.
Preferably, the top cap passes through the cardboard and constitutes the block structure with the sampling bucket, and is connected for rotating between top cap and the cardboard to the cardboard passes through fixed spring and top cap constitution elastic construction.
Preferably, the cross rods are connected with the adjusting rods in a meshed mode, the two groups of adjusting rods are symmetrically arranged on the axis of the top cover, and the adjusting rods and the cleaning block form a lifting structure through adjusting threaded sleeves.
Preferably, the water spray pipe forms a communicating structure with the water tank through the water pump, and the water tank forms a detachable structure with the top cover through the mounting bolt.
Preferably, the mounting panel is provided with two sets of about the axis symmetry of sampling bucket, and the mounting panel constitutes elevation structure through automatic flexible push rod and arm-tie to the nested slipmat that is provided with in the arm-tie outside.
Compared with the prior art, the utility model has the beneficial effects that:
1. the water quality sampling device is convenient to self-clean, a sampling barrel is placed in water to be sampled, the density of materials arranged on a floating plate arranged below the sampling barrel is smaller than that of the water, under the buoyancy of the water, the floating plate can drive a limiting rod to upwards slide on a fixed plate, so that the floating plate is away from a water inlet formed in the bottom of the sampling barrel, the floating plate upwards moves to a certain position on the fixed plate through the limiting block arranged on the outer side of the limiting rod and is supported and fixed, external water enters the sampling barrel through the water inlet, after the water is completely taken out, the sampling barrel is pulled out of the water surface by manpower, the floating plate and the limiting rod downwards move through self gravity, so that the floating plate blocks the water inlet, the water in the sampling barrel is prevented from flowing out of the water inlet, after the water is completely taken out, the clamping plate is outwards pulled by manpower, the clamping plate compresses a fixing spring while outwards rotating on a top cover, the top cover is placed on the sampling barrel, and then the clamping plate is loosened, the clamping plate is restored to the original position through the elasticity of the fixed spring and is clamped into a clamping groove formed in the outer side of the sampling barrel, after the position of the top cover is fixed, the water tank is placed on the top cover, the mounting bolt is manually rotated to fix the position of the water tank, cleaning water is injected into the water tank through a water injection port formed in the outer side of the water tank, the water feeding pump works, the cleaning water in the water tank is injected into a water spray pipe through a water pump, the cleaning water is sprayed into the sampling barrel through the water spray pipe and works for the motor, the motor drives the cross rod to rotate, the adjusting rod is driven to rotate through threads arranged on the outer side when the cross rod rotates, the adjusting screw sleeve and the cleaning block are driven to move up and down on the inner wall of the sampling barrel through the threads arranged below when the adjusting rod rotates in the original position on the top cover, two groups of adjusting rods are arranged, the same-direction rotation between the adjusting screw sleeve and the adjusting rod is avoided, the motor works through positive and negative current, the adjusting screw sleeve conveniently drives the cleaning block to move back and forth on the inner wall of the sampling barrel, come down the incrustation scale self-cleaning on the sampling bucket inner wall, when having washed, open the top cap, the manpower upwards pulls the gag lever post, and the gag lever post drives the kickboard rebound, makes the kickboard leave the delivery port, is convenient for clear away the cleaning water in the sampling bucket, has realized the convenience device automatically cleaning, improves work efficiency, and the people of being convenient for operate and use.
2. This water quality sampling device makes things convenient for the adjustment to use length, the arm-tie is grabbed to the manpower, and drive the sampling bucket and put behind darker waters top, give automatic flexible push rod work, automatic flexible push rod drives the sampling bucket through the mounting panel and carries out elevating movement, after the sampling bucket gets into the aquatic, stop automatic flexible push rod work, through the kickboard, water in the sampling bucket has been collected, give automatic flexible push rod work, automatic flexible push rod drives the sampling bucket rebound and resumes the normal position, and the nested protection pad that is provided with in the arm-tie outside, through the slipmat, can improve the frictional force between people's palm and the arm-tie, avoid people's hand smooth when using, make the sampling bucket fall into the aquatic, cause economic loss, the convenient use length according to user demand adjusting device has been realized.
Drawings
FIG. 1 is a schematic view of a front view of a water sampling device according to the present invention;
FIG. 2 is a schematic view of the bottom structure of the water sampling device of the present invention;
FIG. 3 is a schematic view of the top cover of the present invention;
FIG. 4 is a schematic cross-sectional view of a sampling barrel according to the present invention.
In the figure: 1. a sampling barrel; 2. a fixing plate; 3. a limiting rod; 4. a floating plate; 5. a top cover; 6. clamping a plate; 7. fixing the spring; 8. a cross bar; 9. adjusting a rod; 10. adjusting a threaded sleeve; 11. a cleaning block; 12. a water spray pipe; 13. a water pump; 14. a water tank; 15. installing a bolt; 16. mounting a plate; 17. automatically extending and retracting the push rod; 18. pulling a plate; 19. a non-slip mat.
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. 1-4, the present invention provides a technical solution: a self-cleaning water quality sampling device comprises a sampling barrel 1 and a mounting plate 16, wherein a fixed plate 2 is mounted on the inner side of the sampling barrel 1, the inner side of the fixed plate 2 is connected with a limiting rod 3, a floating plate 4 is fixed below the limiting rod 3, a top cover 5 is arranged above the sampling barrel 1, a clamping plate 6 is connected on the right side of the top cover 5, a fixing spring 7 is arranged on the right side of the clamping plate 6, a cross rod 8 is connected above the top cover 5, an adjusting rod 9 is arranged on the right side of the cross rod 8, an adjusting screw sleeve 10 is connected below the adjusting rod 9, a cleaning block 11 is fixed below the adjusting screw sleeve 10, a water spray pipe 12 is mounted in the middle of the top cover 5, a water pump 13 is connected behind the water spray pipe 12, a water tank 14 is arranged on the right side of the water pump 13, a mounting bolt 15 is connected on the outer side of the water tank 14, the sampling barrel 1 is placed in water to be sampled when the sampling device works, the floating plate 4 mounted below the sampling barrel 1 is lower than the density of the water, under the buoyancy of water, the floating plate 4 can drive the limiting rod 3 to slide upwards on the fixed plate 2, so that the floating plate 4 leaves a water inlet formed at the bottom of the sampling barrel 1, the floating plate 4 moves upwards to a certain position on the fixed plate 2 through a limiting block arranged on the outer side of the limiting rod 3 to be propped and fixed, external water enters the sampling barrel 1 through the water inlet, after the water is taken out, the sampling barrel 1 is pulled out to leave the water surface by manpower, the floating plate 4 and the limiting rod 3 move downwards through the gravity of the floating plate 4, so that the floating plate 4 blocks the water inlet, the water in the sampling barrel 1 is prevented from flowing out from the water inlet, after the water is taken out, the clamping plate 6 is pulled outwards by manpower, the clamping plate 6 compresses the fixing spring 7 while rotating outwards on the top cover 5, after the top cover 5 is placed on the sampling barrel 1, the clamping plate 6 is loosened, the clamping plate 6 is restored to the original position through the elasticity of the fixing spring 7 and is clamped into a clamping groove formed on the outer side of the sampling barrel 1, after the top cover 5 is fixed, the water tank 14 is placed on the top cover 5, the mounting bolt 15 is manually rotated, the water tank 14 is fixed, cleaning water is injected into the water tank 14 through a water injection port arranged on the outer side of the water tank 14, the water feed pump 13 works, the cleaning water in the water tank 14 is injected into the water spray pipe 12 through the water pump 13, the cleaning water is sprayed into the sampling barrel 1 through the water spray pipe 12, the motor works to drive the cross rod 8 to rotate, the adjusting rod 9 is driven to rotate through threads arranged on the outer side when the cross rod 8 rotates, the adjusting screw sleeve 10 and the cleaning block 11 are driven to move up and down on the inner wall of the sampling barrel 1 through the threads arranged below when the adjusting rod 9 rotates in situ on the top cover 5, two groups of adjusting rods 9 are arranged, the co-directional rotation between the adjusting screw sleeve 10 and the adjusting rod 9 is avoided, the adjusting screw sleeve 10 conveniently drives the cleaning block 11 to move back and forth on the inner wall of the sampling barrel 1 through the positive and negative current of the motor, come down the incrustation scale self-cleaning on the 1 inner wall of sampling bucket, when having washed, open top cap 5, the manpower with gag lever post 3 to the pull-up, gag lever post 3 drives kickboard 4 rebound, makes kickboard 4 leave the delivery port, is convenient for clear away the cleaning water in the 1 interior of sampling bucket, has realized the convenience of equipment automatically cleaning, improves work efficiency, the people of being convenient for operate and use.
The mounting plate 16 is fixed on the left side of the sampling barrel 1, the automatic telescopic push rod 17 is mounted above the mounting plate 16, the pull plate 18 is fixed above the automatic telescopic push rod 17, the anti-slip pad 19 is arranged on the outer side of the pull plate 18, when in use, the pull plate 18 is manually grasped, the sampling barrel 1 is driven to be placed above a deeper water area, the automatic telescopic push rod 17 is driven to work, the automatic telescopic push rod 17 drives the sampling barrel 1 to carry out lifting movement through the mounting plate 16, the automatic telescopic push rod 17 stops working after the sampling barrel 1 enters the water, the water in the sampling barrel 1 is collected through the floating plate 4, the automatic telescopic push rod 17 is driven to work, the automatic telescopic push rod 17 drives the sampling barrel 1 to move upwards to return to the original position, the anti-slip pad 19 is nested on the outer side of the pull plate 18, the friction force between a palm and the pull plate 18 can be improved through the anti-slip pad 19, and the hand slip of a user is avoided, make sample bucket 1 drop into the aquatic, cause economic loss, the convenient use length according to user demand adjusting device.
The fixed plate 2 is connected with the limiting rod 3 in a sliding way, the limiting rod 3 is connected with the floating plate 4 in a fixed way, and the floating plate 4 is designed to be an EVA material layer, when the sampling device works, the sampling barrel 1 is placed in water to be sampled, the density of the material arranged on the floating plate 4 arranged below the sampling barrel 1 is less than that of the water, under the buoyancy of water, the floating plate 4 drives the limiting rod 3 to slide upwards on the fixed plate 2, so that the floating plate 4 leaves a water inlet arranged at the bottom of the sampling barrel 1, the floating plate 4 moves upwards on the fixed plate 2 to a certain position through a limiting block arranged at the outer side of the limiting rod 3 and is propped and fixed, and outside water passes through in the water inlet gets into sampling bucket 1, and after water got up, the manpower will be sampled bucket 1 and pull out and leave the surface of water, and kickboard 4 moves downwards through the gravity of self with gag lever post 3, makes kickboard 4 block the water inlet, avoids the water in the sampling bucket 1 to flow out from the water inlet.
For the meshing to be connected between horizontal pole 8 and the regulation pole 9, and adjust pole 9 and be provided with two sets ofly about the axis symmetry of top cap 5, and adjust pole 9 and constitute elevation structure through adjusting swivel nut 10 and cleaning piece 11, give the motor work during operation, the motor drives horizontal pole 8 and rotates, the screw thread that sets up through the outside when horizontal pole 8 rotates drives regulation pole 9 and rotates, adjust pole 9 and carry out the elevating movement on the inner wall of sampling bucket 1 through the screw thread drive regulation swivel nut 10 that the below set up when the normal position rotates on top cap 5 with cleaning piece 11, be provided with two sets of regulation poles 9, it rotates with the syntropy between regulation swivel nut 10 and the regulation pole 9 to have avoided, through giving the positive and negative current work of motor, conveniently make and adjust swivel nut 10 and drive cleaning piece 11 and carry out the back and forth movement on sampling bucket 1 inner wall, come under the incrustation scale self-cleaning on sampling bucket 1 inner wall.
Two groups of mounting plates 16 are symmetrically arranged about the axis of the sampling barrel 1, the mounting plates 16 form a lifting structure through an automatic telescopic push rod 17 and a pulling plate 18, a non-slip mat 19 is nested outside the pulling plate 18, the pulling plate 18 is grasped manually during working, the sampling barrel 1 is driven to be placed above a deeper water area and then is driven to work through the automatic telescopic push rod 17, the automatic telescopic push rod 17 drives the sampling barrel 1 to carry out lifting movement through the mounting plates 16 until the sampling barrel 1 enters water, the automatic telescopic push rod 17 stops working until the sampling barrel 1 finishes working, water in the sampling barrel 1 is collected through a floating plate 4, the automatic telescopic push rod 17 is driven to work, the automatic telescopic push rod 17 drives the sampling barrel 1 to move upwards and return to the original position, the non-slip mat 19 is nested outside the pulling plate 18, the friction force between the palm of a user and the pulling plate 18 can be improved through the non-slip mat 19, the user is prevented from slipping when using the user, and the sampling barrel 1 falls into water, resulting in economic losses.
The working principle is as follows: the water quality sampling device is firstly convenient to self-clean, a sampling barrel 1 is placed in water to be sampled, the density of materials arranged on a floating plate 4 arranged below the sampling barrel 1 is smaller than that of the water, under the buoyancy of the water, the floating plate 4 can drive a limiting rod 3 to slide upwards on a fixing plate 2, the floating plate 4 is enabled to leave a water inlet formed in the bottom of the sampling barrel 1, the floating plate 4 moves upwards to a certain position on the fixing plate 2 through a limiting block arranged on the outer side of the limiting rod 3 and is abutted and fixed, external water enters the sampling barrel 1 through the water inlet, after the water is taken out, the sampling barrel 1 is pulled out from the water surface by manpower, the floating plate 4 and the limiting rod 3 move downwards through the gravity of the floating plate 4, the water inlet is prevented from flowing out of the water in the sampling barrel 1, after the water is taken out, the clamping plate 6 is pulled outwards by manpower, the clamping plate 6 compresses a fixing spring 7 while rotating outwards on a top cover 5, after the top cover 5 is placed on the sampling barrel 1, the clamping plate 6 is loosened, the clamping plate 6 is restored to the original position through the elasticity of the fixing spring 7 and is clamped into a clamping groove formed in the outer side of the sampling barrel 1, after the top cover 5 is fixed in position, the water tank 14 is placed on the top cover 5, the mounting bolt 15 is manually rotated, the position of the water tank 14 is fixed, cleaning water is injected into the water tank 14 through a water injection port formed in the outer side of the water tank 14, the water feeding pump 13 works, the cleaning water in the water tank 14 is injected into the water spraying pipe 12 through the water pump 13, the cleaning water is sprayed into the sampling barrel 1 through the water spraying pipe 12 to work for the motor, the motor drives the cross rod 8 to rotate, the adjusting rod 9 is driven to rotate through the threads arranged on the outer side when the cross rod 8 rotates, the adjusting screw sleeve 10 and the cleaning block 11 are driven to perform lifting motion on the inner wall of the sampling barrel 1 through the threads arranged below when the adjusting rod 9 rotates in the original position on the top cover 5, be provided with two sets of regulation poles 9, it rotates with adjusting syntropy between the pole 9 to have avoided adjusting swivel nut 10, through giving the positive and negative current work of motor, conveniently make and adjust swivel nut 10 and drive clean piece 11 and carry out the back and forth movement on sampling bucket 1 inner wall, come under the incrustation scale self-cleaning on sampling bucket 1 inner wall, when having washed, open top cap 5, the manpower is 3 to the pull-up of gag lever post, gag lever post 3 drives 4 rebound of kickboard, make kickboard 4 leave the delivery port, be convenient for clear away the clean water in sampling bucket 1, the convenience of equipment automatically cleaning has been realized, the work efficiency is improved, the people of being convenient for operate and use.
This quality of water sampling device, at last convenient adjustment length of use, the arm-tie 18 is grabbed to the manpower, and drive sampling bucket 1 and put behind darker waters top, give automatic flexible push rod 17 work, automatic flexible push rod 17 drives sampling bucket 1 through mounting panel 16 and carries out elevating movement, after sampling bucket 1 gets into the aquatic, stop automatic flexible push rod 17 work, through kickboard 4, the water in sampling bucket 1 has been collected, give automatic flexible push rod 17 work, automatic flexible push rod 17 drives sampling bucket 1 rebound and resumes the normal position, and the nested slipmat 19 that is provided with in the arm-tie 18 outside, through slipmat 19, can improve the frictional force between people's palm and arm-tie 18, avoid people's hand smooth when using, make sampling bucket 1 fall into the aquatic, cause economic loss, the convenient use length according to user demand adjusting device that has been realized.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a self-cleaning quality of water sampling device, includes sampling bucket (1) and mounting panel (16), its characterized in that: the sampling device is characterized in that a fixed plate (2) is installed on the inner side of the sampling barrel (1), a limiting rod (3) is connected to the inner side of the fixed plate (2), a floating plate (4) is fixed below the limiting rod (3), a top cover (5) is arranged above the sampling barrel (1), a clamping plate (6) is connected to the right side of the top cover (5), a fixed spring (7) is arranged on the right side of the clamping plate (6), a cross rod (8) is connected to the upper side of the top cover (5), an adjusting rod (9) is arranged on the right side of the cross rod (8), an adjusting screw sleeve (10) is connected to the lower side of the adjusting rod (9), a cleaning block (11) is fixed below the adjusting screw sleeve (10), a water spray pipe (12) is installed in the middle of the top cover (5), a water pump (13) is connected to the rear side of the water spray pipe (12), and a water tank (14) is arranged on the right side of the water pump (13), and the outer side of the water tank (14) is connected with a mounting bolt (15).
2. A self-cleaning water sampling apparatus as defined in claim 1 wherein: mounting panel (16) are fixed in the left side of sampling bucket (1), and automatic flexible push rod (17) are installed to the top of mounting panel (16), the top of automatic flexible push rod (17) is fixed with arm-tie (18), and the outside of arm-tie (18) is provided with slipmat (19).
3. A self-cleaning water sampling apparatus as defined in claim 1 wherein: be sliding connection between fixed plate (2) and gag lever post (3), and be fixed connection between gag lever post (3) and kickboard (4) to kickboard (4) are the design of EVA material layer.
4. A self-cleaning water sampling apparatus as defined in claim 1 wherein: top cap (5) constitute the block structure through cardboard (6) and sampling bucket (1), and are connected for rotating between top cap (5) and cardboard (6) to cardboard (6) constitute elastic construction through fixed spring (7) and top cap (5).
5. A self-cleaning water sampling apparatus as defined in claim 1 wherein: the cross rod (8) is connected with the adjusting rod (9) in a meshed mode, two groups of adjusting rods (9) are symmetrically arranged on the axis of the top cover (5), and the adjusting rods (9) and the cleaning blocks (11) form a lifting structure through adjusting threaded sleeves (10).
6. A self-cleaning water sampling apparatus as defined in claim 1 wherein: the water spray pipe (12) and the water tank (14) form a communicating structure through the water pump (13), and the water tank (14) and the top cover (5) form a detachable structure through the mounting bolt (15).
7. A self-cleaning water sampling apparatus as defined in claim 2 wherein: the installation plate (16) is symmetrically provided with two groups about the axis of the sampling barrel (1), the installation plate (16) forms a lifting structure with the pulling plate (18) through an automatic telescopic push rod (17), and the outer side of the pulling plate (18) is provided with an anti-skid pad (19) in a nested mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125067.2U CN216621872U (en) | 2021-12-13 | 2021-12-13 | Automatically cleaning quality of water sampling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123125067.2U CN216621872U (en) | 2021-12-13 | 2021-12-13 | Automatically cleaning quality of water sampling device |
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| CN216621872U true CN216621872U (en) | 2022-05-27 |
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| CN202123125067.2U Active CN216621872U (en) | 2021-12-13 | 2021-12-13 | Automatically cleaning quality of water sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117804841A (en) * | 2024-02-29 | 2024-04-02 | 四川省水利科学研究院 | Water conservancy water quality sampling equipment and application method thereof |
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2021
- 2021-12-13 CN CN202123125067.2U patent/CN216621872U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117804841A (en) * | 2024-02-29 | 2024-04-02 | 四川省水利科学研究院 | Water conservancy water quality sampling equipment and application method thereof |
| CN117804841B (en) * | 2024-02-29 | 2024-05-07 | 四川省水利科学研究院 | Water conservancy water quality sampling equipment and application method thereof |
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