CN218847716U - Bottled water sampling instrument - Google Patents
Bottled water sampling instrument Download PDFInfo
- Publication number
- CN218847716U CN218847716U CN202220468886.2U CN202220468886U CN218847716U CN 218847716 U CN218847716 U CN 218847716U CN 202220468886 U CN202220468886 U CN 202220468886U CN 218847716 U CN218847716 U CN 218847716U
- Authority
- CN
- China
- Prior art keywords
- puncture
- diaphragm pump
- pipe
- bottled water
- water sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The application discloses a barreled water sampling instrument which comprises a main control circuit board, a touch display screen, a diaphragm pump driving board, a puncture part, a diaphragm pump and a gas conveying pipe; the touch display screen, the diaphragm pump driving board and the main control circuit board are connected, and the diaphragm pump driving board is used for driving the diaphragm pump; the puncture component comprises a self-adaptive sealing assembly, the self-adaptive sealing assembly comprises a first puncture pipe and a second puncture pipe, the length of the first puncture pipe is shorter than that of the second puncture pipe, the first end of the first puncture pipe is connected to the diaphragm pump through the gas conveying pipe, and the first end of the second puncture pipe is used for connecting a sampling bottle; the second end of the first puncture tube and the second end of the second puncture tube are used for penetrating into a barrelhead of barreled water. This bottled water appearance of taking a sample can realize automatic sampling, and the human cost that has significantly reduced makes water sample collection more convenient and humanized. The application can be widely applied to the technical field of water quality sampling.
Description
Technical Field
The utility model belongs to the technical field of the quality of water sampling technique and specifically relates to a bottled water sampling instrument.
Background
Bottled water on the market generally is equipped with the water dispenser that corresponds and just can get the water, in order to improve the security of drinking water, needs carry out regular sample analysis quality of water condition to bottled water.
In the correlation technique, when sampling detection is carried out on the barreled water, a small amount of water sample collection is generally carried out. The traditional water sampling mode of the barreled water is that the barreled water is lifted manually, and a small part of water is poured out for collection; the mode is time-consuming and labor-consuming, and in the acquisition process, water quality is easily polluted, and the detection accuracy is influenced.
In summary, the problems of the related art need to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve one of the technical problems existing in the correlation technique to a certain extent at least.
Therefore, an object of the embodiment of the present invention is to provide a bottled water sampling instrument.
In order to achieve the technical purpose, the embodiment of the present invention adopts a technical solution including:
in one aspect, the embodiment of the utility model provides a bottled water sampling instrument, include:
the device comprises a main control circuit board, a touch display screen, a diaphragm pump driving board, a puncture part, a diaphragm pump and a gas pipe;
the touch display screen, the diaphragm pump driving plate and the main control circuit board are connected, and the diaphragm pump driving plate is used for driving the diaphragm pump; the puncture component comprises a self-adaptive closing assembly, the self-adaptive closing assembly comprises a first puncture tube and a second puncture tube, the length of the first puncture tube is shorter than that of the second puncture tube, the first end of the first puncture tube is connected to the diaphragm pump through the gas pipe, and the first end of the second puncture tube is used for connecting a sampling bottle; the second end of the first puncture tube and the second end of the second puncture tube are used for penetrating into a barrelhead of barreled water.
In addition, according to the utility model discloses bottled water appearance of taking a sample of above-mentioned embodiment can also have following additional technical characterstic:
further, in an embodiment of the present invention, the main control circuit board includes a microprocessor, a storage module, a PWM generator, a timing counter module and a USB to serial port module;
the storage module, the PWM generating device, the timing counting module and the USB-to-serial port module are connected to the microprocessor.
Further, in an embodiment of the present invention, the microprocessor includes an STC12 series single chip or an STM32 series single chip.
Further, in an embodiment of the present invention, the memory module includes a memory chip with a model W25Q 64.
Further, in an embodiment of the present invention, the bottled water sampling apparatus further includes a power module;
the power supply module comprises a rechargeable battery, a power switch, a power conversion module and a charging interface;
the charging interface is connected with the rechargeable battery, and the rechargeable battery is connected with the power supply conversion module through the power supply switch.
Further, in an embodiment of the present invention, the bottled water sampling apparatus further includes an air filter;
the air filter is arranged on the air conveying pipe.
Further, in an embodiment of the present invention, the touch display screen includes a color liquid crystal screen and a digital output capacitive touch screen.
Further, in one embodiment of the present invention, the piercing member further comprises a knurled mounting assembly; the knurling installation component and the self-adaptive sealing component are detachably connected.
Further, in an embodiment of the present invention, the first puncture tube and the second puncture tube are metal tubes.
Advantages and benefits of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention:
the application discloses a barreled water sampling instrument which comprises a main control circuit board, a touch display screen, a diaphragm pump driving board, a puncture part, a diaphragm pump and a gas pipe; the touch display screen, the diaphragm pump driving plate and the main control circuit board are connected, and the diaphragm pump driving plate is used for driving the diaphragm pump; the puncture component comprises a self-adaptive closing assembly, the self-adaptive closing assembly comprises a first puncture tube and a second puncture tube, the length of the first puncture tube is shorter than that of the second puncture tube, the first end of the first puncture tube is connected to the diaphragm pump through the gas pipe, and the first end of the second puncture tube is used for connecting a sampling bottle; the second end of the first puncture tube and the second end of the second puncture tube are used for puncturing a barrelhead of barreled water. This bottled water appearance of taking a sample can realize automatic sampling, and the human cost that has significantly reduced makes water sample collection more convenient and humanized.
Drawings
Fig. 1 is a schematic structural view of a bottled water sampling instrument according to an embodiment of the present invention;
fig. 2 is a schematic external view of a bottled water sampling instrument according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a main control circuit board of the barreled water sampling instrument provided by the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "upper", "lower", "front", "rear", "left", "right", "top", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, 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, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Barreled water on the market is generally equipped with corresponding water dispenser and just can get water, in order to improve the security of drinking water, needs carry out regular sampling analysis quality of water condition to the barreled water.
In the correlation technique, when sampling detection is carried out on the barreled water, a small amount of water sample collection is generally carried out. The traditional barreled water sampling mode is that the barreled water is lifted manually, and a small part of water is poured out for collection; the mode is time-consuming and labor-consuming, and in the acquisition process, water quality is easily polluted, and the detection accuracy is influenced.
In view of this, this application embodiment provides a bottled water appearance of taking a sample, this appearance of taking a sample pierces through the sunken department of bottled water bung through the puncture part of self-adaptation closed, and then operating personnel can be through the process of touch display screen control water sample collection. Compared with the traditional mode, the automatic sampling is realized in the water sample collecting mode of using the barreled water sampling instrument in the embodiment of the application, the labor cost is greatly reduced, and the water sample collection is more convenient and humanized.
The following describes the barreled water sampling instrument provided in the embodiments of the present application in detail with reference to the accompanying drawings.
The bottled water sampling instrument that provides in the embodiment of this application can be applied to quality of water sample technical field. Specifically, referring to fig. 1 and fig. 2, the barreled water sampling apparatus 1 in the embodiment of the present application mainly includes:
the device comprises a main control circuit board, a touch display screen 2, a diaphragm pump driving board, a puncture part, a diaphragm pump and a gas transmission pipe 5;
the touch display screen 2, the diaphragm pump driving plate and the main control circuit board are connected, and the diaphragm pump driving plate is used for driving the diaphragm pump; the puncture component comprises a self-adaptive sealing assembly, the self-adaptive sealing assembly comprises a first puncture tube 4 and a second puncture tube 3, the length of the first puncture tube 4 is shorter than that of the second puncture tube 3, the first end of the first puncture tube 4 is connected to the diaphragm pump through the gas pipe 5, and the first end of the second puncture tube 3 is used for connecting a sampling bottle; the second end of the first puncture tube 4 and the second end of the second puncture tube 3 are used for puncturing the barrelhead of the barreled water.
In the embodiment of this application, provide one kind and can carry out aseptic equipment of taking a sample to bottled water, this equipment includes main control circuit board, touch display screen, diaphragm pump drive plate, puncture part, diaphragm pump and gas-supply pipe. Next, the respective constituent elements of the bottled water sampling apparatus in the embodiment of the present application will be described first.
In this application embodiment, the main control circuit board of bottled water sample appearance is main controlling means for receive and respond to operating personnel's correlation operation, thereby realize the sample to the bottled water. Specifically, referring to fig. 3, the main control circuit board may include a microprocessor, a storage module, a PWM (pulse width modulation) generator, a timing counting module, and a USB serial-to-serial port module; the microprocessor may be composed of any one or more processor chips including an MCU singlechip, an FPGA, a CPLD, a DSP, an ARM, and the like, for example, the singlechip chip may be set as an STC12 series singlechip chip or an STM32 series singlechip chip. For example, in the embodiment of the present application, the chip STM32F103RCT6 may be used as a core unit of the entire system to process all the operation logics. Of course, the specific chip type may be flexibly adjusted according to the requirement, and is not limited in this embodiment. The storage module can adopt a W25Q64 memory chip of a nonvolatile flash memory, the storage capacity of the storage module is 8M (megabytes), the storage module has the characteristics of large capacity, no loss of stored data after power failure and strong traceability. The PWM generating means is used to provide a PWM signal to the diaphragm pump drive plate to control the flow rate of the diaphragm pump. The timing counting module can provide accurate timing, and water sampling is conveniently and quantitatively carried out. And the USB-to-serial port module can be connected to a computer end, can lead out the acquired storage data and is convenient to analyze and trace to the source. Foretell PWM generating device, timing count module with USB changes serial ports module, all can build and realize according to relevant current application circuit, and this application does not do this and gives unnecessary detail one by one.
In the embodiment of the application, the touch display screen can comprise a colorful high-resolution liquid crystal screen and a digital output capacitive touch screen; the color high-resolution liquid crystal display screen can adopt a 3.5-inch high-resolution liquid crystal display screen, the pixel is 800x480, the size is small, the pixel is high, the display content is finer, the high-definition color display enables the operation steps to be clearer and more intuitive, and the operation is easy. The digital output capacitive touch screen can be controlled by a GT911 capacitive touch chip, supports 5-point touch, can be conveniently connected with a main control circuit board through a digital output interface, reduces the requirement on a connecting circuit, has high sensitivity, and can quickly feed back the current touch position after being touched.
In this application embodiment, the diaphragm pump drive board can receive the control signal from the main control circuit board for drive and control diaphragm pump. The inside of the diaphragm pump comprises a direct current brushless motor and a Hall magnetic sensor; the diaphragm pump drive plate controls the action of the direct-current brushless motor by sending a drive signal and receives a feedback signal of the Hall magnetic sensor, so that the flow rate of the diaphragm pump is adjustable and controllable, the flow rate can be stabilized in a certain range according to requirements, and the water sample amount is adjustable and accurate.
In this application embodiment, the puncture part can contain annular knurl installation component and the airtight subassembly of toper self-adaptation, wherein, annular knurl installation component can adopt embedded connection with the airtight subassembly of toper self-adaptation, makes things convenient for dismouting disinfection and isolation and change, and the airtight subassembly of toper self-adaptation is including two puncture tubes, marks as first puncture tube and second puncture tube respectively, and wherein, the length of first puncture tube is shorter than the second puncture tube, and, in some embodiments, the pipe diameter of first puncture tube can be greater than the second puncture tube. The first puncture tube is used for communicating the diaphragm pump with the space in the barrel of the barreled water and is a way for inflating the diaphragm pump; the second puncture pipe is used for connecting the space in the barrel and the external environment and discharging water samples needing to be collected. Specifically, the first end of first puncture pipe can be connected to the diaphragm pump through the gas-supply pipe, and the bung of bottled water can be pierced to the second end of first puncture pipe, so, the gas that the diaphragm pump was pumped can enter into the barreled aquatic. Similarly, the first end of second puncture pipe is used for connecting the sampling bottle, and the second end of second puncture pipe is used for stabbing the bung of bottled water to can go deep into below the surface of water of bottled water, so, the water in the bucket can be followed the second puncture pipe and is arranged into the sampling bottle, thereby can accomplish the collection of water sample.
The working principle of the bottled water sampling instrument provided in the embodiment of the present application is described below with reference to the descriptions of the above-mentioned components of the bottled water sampling instrument.
In this application embodiment, the master control circuit board of bottled water sample appearance links to each other with the diaphragm pump drive plate, and the diaphragm pump circuit board receives the control signal who comes from master control circuit board, converts the drive signal to the diaphragm pump with control signal, and then controls opening of diaphragm pump and stops and output flow value. The touch display screen is connected to the main control circuit board, can receive display signals from the main control circuit board, and can also send the touch signals to the main control circuit board, so that the effects of displaying corresponding contents and touching input control signals are achieved. The puncture part adopts the design of double tube formula, including annular knurl installation component and the airtight subassembly of self-adaptation, and wherein, the airtight subassembly of self-adaptation includes first puncture pipe and second puncture pipe, and two puncture pipes can adopt the tubular metal resonator. The first puncture pipe is an air compression pipe, the second puncture pipe is a water outlet pipe, and the water outlet pipe is longer and is convenient for collecting a water sample of barreled water; the air pressing pipe is short, when air is filled into the air pressing guide pipe of the puncture part from the diaphragm pump, the air with pressure is discharged from the air pressing guide pipe, the pressure intensity of the air in the barrel is gradually increased, and when the air pressure is larger than the external atmospheric pressure, water in the barrel is discharged through the water outlet guide pipe until the air pressing guide pipe does not continuously provide the air with the pressure. The diaphragm pump provides inflation power, and can fill gas into the barrel through the gas pipe. The automatic sampling is realized to the water sample collection mode that uses bottled water sampling appearance in this application embodiment, the human cost that has significantly reduced makes water sample collection more convenient and humanized.
In some embodiments, the bottled water sampler further comprises a power module;
the power supply module comprises a rechargeable battery, a power switch, a power conversion module and a charging interface;
the charging interface is connected with the rechargeable battery, and the rechargeable battery is connected with the power supply conversion module through the power supply switch.
In the embodiment of the application, the power supply module can be arranged in the barreled water sampling instrument, and the power supply module can convert the electric energy received from the rechargeable battery or the charging interface into the electric energy required by the main control circuit board to supply power voltage to the main control circuit board, so that the main control circuit board can work normally; and the power supply voltage required by the motor drive is converted to be supplied to the diaphragm pump driving circuit board, so that the diaphragm pump driving circuit board can normally work. Specifically, in the embodiment of the application, the rechargeable battery can be a rechargeable lithium battery with a high capacity of 6800mAh, the voltage of the battery is 22.2V, the instantaneous current of the battery is enough to start the diaphragm pump, the current ripple of the battery operation is small, and the device can stably sample. The charging interface is a power adapter interface, and can be connected with a power adapter for converting AC100-240V into DC25.2V/2A to charge the equipment. The power switch can adopt a waterproof ship-shaped switch, has long service life, high temperature resistance and high current impact resistance, and is used for cutting off the power supply when the equipment does not need to work so as to achieve the purpose of saving electric power. The power conversion module can comprise a DC-DC (direct current to direct current) voltage reduction module, and after the power voltage from the battery or the charging interface is reduced, the power conversion module provides power for the main control circuit board and the peripheral low-voltage devices; the device also comprises a DC-DC boosting module which is used for boosting the power supply voltage from the battery or the power supply interface and then transmitting the boosted power supply voltage to the driving plate of the diaphragm pump so as to provide enough power supply power for the operation of the diaphragm pump. In the embodiment of the application, the power module comprising the rechargeable battery is used, so that the equipment is convenient to reduce the size, and the constraint of a power line is broken away to a certain degree.
In some embodiments, the bottled water sampler further comprises an air filter;
the air filter is arranged on the air conveying pipe.
In the embodiment of the application, an air filter, such as an air filter, can be arranged on the air conveying pipe. The air filter can filter the air, and then the positive air pressure generated by the diaphragm pump fills the filtered air into the barrel to be sampled, so that the air containing microorganisms is filled into the barrel to pollute the water in the barrel and influence the detection accuracy.
The barreled water sampling instrument is simple and portable in operation, the sunken part of the barreled water cover is pierced through the self-adaptive closed type puncturing part, and then an operator can control water sampling through the touch display screen; compared with the traditional mode, the water sample collection mode realizes automation, greatly reduces manpower, and makes water sample collection more convenient and humanized; the puncture part of the sampling instrument is convenient to disassemble and assemble, and is easier to clean, disinfect and sterilize; this sample appearance contains diaphragm pump and air cleaner, diaphragm pump and air cleaner's combination for the water sample collection process is pollution-free, can remain the primitiveness of water sample in the at utmost, can improve the accuracy that the water sample was gathered and is detected.
In the description herein, references to the description of "one embodiment," "another embodiment," or "certain embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a bottled water appearance of taking a sample which characterized in that includes:
the device comprises a main control circuit board, a touch display screen, a diaphragm pump driving board, a puncture part, a diaphragm pump and a gas transmission pipe;
the touch display screen, the diaphragm pump driving plate and the main control circuit board are connected, and the diaphragm pump driving plate is used for driving the diaphragm pump; the puncture component comprises a self-adaptive sealing assembly, the self-adaptive sealing assembly comprises a first puncture pipe and a second puncture pipe, the length of the first puncture pipe is shorter than that of the second puncture pipe, the first end of the first puncture pipe is connected to the diaphragm pump through the gas conveying pipe, and the first end of the second puncture pipe is used for connecting a sampling bottle; the second end of the first puncture tube and the second end of the second puncture tube are used for penetrating into a barrelhead of barreled water.
2. The barreled water sampling instrument according to claim 1, wherein the main control circuit board comprises a microprocessor, a storage module, a PWM generating device, a timing counting module and a USB-to-serial port module;
the storage module, the PWM generating device, the timing counting module and the USB-to-serial port module are connected to the microprocessor.
3. The bottled water sampling apparatus according to claim 2, wherein the microprocessor comprises an STC12 series single chip or an STM32 series single chip.
4. The bottled water sampling apparatus according to claim 2, wherein the storage module includes a model W25Q64 memory chip.
5. The bottled water sampling apparatus according to any one of claims 1 to 4, wherein the bottled water sampling apparatus further comprises a power supply module;
the power supply module comprises a rechargeable battery, a power switch, a power conversion module and a charging interface;
the charging interface is connected with the rechargeable battery, and the rechargeable battery is connected with the power supply conversion module through the power supply switch.
6. The bottled water sampling apparatus according to claim 1, further comprising an air filter;
the air filter is arranged on the air conveying pipe.
7. The bottled water sampling apparatus according to claim 1, wherein the touch display screen comprises a color liquid crystal screen and a digital output capacitive touch screen.
8. The barreled water sampling apparatus of claim 1 wherein the piercing member further comprises a knurled mounting assembly; the knurling installation component and the self-adaptive sealing component are detachably connected.
9. The bottled water sampling apparatus according to claim 8, wherein the first and second piercing tubes are metal tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220468886.2U CN218847716U (en) | 2022-03-03 | 2022-03-03 | Bottled water sampling instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220468886.2U CN218847716U (en) | 2022-03-03 | 2022-03-03 | Bottled water sampling instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218847716U true CN218847716U (en) | 2023-04-11 |
Family
ID=87310619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220468886.2U Active CN218847716U (en) | 2022-03-03 | 2022-03-03 | Bottled water sampling instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218847716U (en) |
-
2022
- 2022-03-03 CN CN202220468886.2U patent/CN218847716U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101338275A (en) | Multifunction air microbe sampling box | |
| CN215574941U (en) | Formaldehyde detection device | |
| CN218847716U (en) | Bottled water sampling instrument | |
| CN110672383A (en) | Negative pressure water absorption type automatic sampler | |
| CN204286889U (en) | A kind of airbag air sampler | |
| CN206057547U (en) | A kind of Portable DC voltage sensor test device | |
| CN211022713U (en) | Automatic venous blood collecting device | |
| CN201268700Y (en) | Multifunctional air microbial sampling box | |
| CN209495880U (en) | A kind of environmental protection waste water treatment detection sampling apparatus | |
| CN218372279U (en) | Cell culture solution sampling equipment for research and development | |
| CN101995481B (en) | Fast detector for ultra-trace disease markers | |
| CN111330095A (en) | Intelligent negative pressure suction control system | |
| CN101082629B (en) | Liquid automatically quantificationally continuously sampling device | |
| CN102671430A (en) | Automatic blood plasma separation meter | |
| CN213812432U (en) | Matrix type NB-IOT (network b-internet of things) intelligent water meter with valve | |
| CN212134189U (en) | Environmental pollution source water quality sampler | |
| CN109596609A (en) | A kind of multi-parameter sewage quality monitor | |
| CN208707363U (en) | Variable current voltage output system | |
| CN216614662U (en) | Intelligent bacteria collecting instrument | |
| CN207675654U (en) | A kind of multi-parameter water quality monitor | |
| CN218542569U (en) | Peristaltic pump quick calibration system | |
| CN202777933U (en) | Automatic blood plasma separometer | |
| CN219890823U (en) | River environment detection sampling device | |
| CN219284743U (en) | Sewage collection sampling terminal for water quality monitoring | |
| CN2759963Y (en) | Dustbin with a self-opening cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |