CN-121994547-A - Quantitative sampling device for water quality analysis

CN121994547ACN 121994547 ACN121994547 ACN 121994547ACN-121994547-A

Abstract

The invention provides a quantitative sampling device for water quality analysis, and belongs to the technical field of water quality analysis. Including the chassis, fixedly connected with mount on the chassis, electric telescopic handle is installed to the top symmetry of mount, and electric telescopic handle's expansion end bottom fixedly connected with servo motor, servo motor's terminal fixedly connected with first gear of drive shaft, the bottom of first gear is connected with the fly frame through connecting rod and bearing frame rotation, and the bottom fixedly connected with of fly frame supports the pressure frame, and evenly distributed's positioning seat is fixedly installed on the chassis. According to the invention, the lifting first gear, the connecting rod and the pressing frame are arranged, when the first gear is pressed down and meshed with the second gears with different heights, the pressing frame synchronously presses down the corresponding C-shaped area, so that the movable rod deforms in the weakening area to drive the sealing head to separate from the water pipe, the linkage control of the sealing assembly and the extraction assembly is realized, and the accurate opening and closing and isolation of the sampling channels in the process of collecting water samples with different depths are ensured.

Inventors

WANG HAONAN
LIU HAIYAN
CHEN XIANG
Dong Qiuzhi
JING ZHIHAO
ZHOU HANBAO
JI QINGWEI

Assignees

江苏省骆运水利工程管理处

Dates

Publication Date: 20260508
Application Date: 20260313

Claims (10)

1. The quantitative sampling device for water quality analysis is characterized by comprising a chassis, wherein a fixing frame is fixedly connected to the chassis, an electric telescopic rod is symmetrically arranged at the top of the fixing frame, a servo motor is fixedly connected to the bottom end of a movable end of the electric telescopic rod, a first gear is fixedly connected to the tail end of a driving shaft of the servo motor, the bottom end of the first gear is rotatably connected with a movable frame through a connecting rod and a bearing seat, a pressing frame is fixedly connected to the bottom end of the movable frame, positioning seats which are uniformly distributed are fixedly arranged on the chassis, through openings are formed in the bottom of the chassis, a sampling tube is sleeved on the inner side of the positioning seats, and a water pipe is fixedly connected to the bottom end of the sampling tube; The sampling tube is internally provided with an extraction assembly, the extraction assembly is used for forming negative pressure in the sampling tube to extract a water sample, the extraction assembly comprises a piston sleeved in the sampling tube, and the outer ring part of the piston is mutually attached to the inner side wall of the sampling tube; the top end of the extraction assembly extends to the outside of the sampling tube and is provided with a second gear, the sampling tube and the second gear are respectively provided with four groups, and the heights of the four second gears on the sampling tube are gradually increased; The middle part fixedly connected with support column of chassis, the outside of support column is provided with evenly distributed's closure subassembly, and the closure subassembly is used for the water pipe end open-ended to seal, and the closure subassembly includes support column outside fixed connection's movable rod.
2. The quantitative sampling device for water quality analysis according to claim 1, wherein the bottom end of the first gear is fixedly connected with the top end of the connecting rod, the bottom end of the connecting rod is fixedly connected with the inner side wall of the bearing seat, and the outer part of the bearing seat is fixedly connected with the top end of the movable frame.
3. The quantitative sampling device for water quality analysis according to claim 1, wherein an opening facing the movable rod is formed in the outer portion of the positioning seat, a fastening bolt is connected to the outer portion of the positioning seat in a threaded manner, and a thread groove matched with the fastening bolt in shape is formed in the outer portion of the sampling tube.
4. The quantitative sampling device for water quality analysis according to claim 1, wherein a base surrounding the outer side of the water pipe is arranged at the bottom of the sampling tube, an opening facing the movable rod is formed in the base, and the tail end of the water pipe passes through the opening and extends to the outer side of the sampling tube.
5. The quantitative sampling device for water quality analysis according to claim 1, wherein the top of the piston is fixedly connected with a threaded pipe, the top of the sampling tube is rotatably connected with a threaded rod through a bearing, the threaded rod is in threaded connection with the threaded pipe, and the top of the threaded rod extends to the upper part of the top of the sampling tube and is fixedly connected with a second gear.
6. The quantitative sampling device for water quality analysis according to claim 5, wherein limiting pipes are symmetrically arranged between the piston and the inner side wall of the sampling tube, each limiting pipe consists of an inner pipe and an outer pipe, the outer pipe is fixedly connected with the top of the piston, the inner pipe is fixedly connected with the top of the inner side wall of the sampling tube, and the inner pipe is slidably sleeved in the outer pipe.
7. The quantitative sampling device for water quality analysis according to claim 1, wherein the top of the sampling tube is provided with an operation port, the piston is sleeved with a sealing plug corresponding to the position of the operation port, and a through round hole matched with the shape of the sealing plug is formed in the piston.
8. The quantitative sampling device for water quality analysis according to claim 1, wherein the movable rods are in one-to-one correspondence with the sampling cylinders, the movable rods are parallel to the supporting columns, the top ends of the movable rods are bent and fixedly connected with the top ends of the supporting columns, and the movable rods are provided with weakening areas which are in a C shape and are close to the bent positions.
9. The quantitative sampling device for water quality analysis according to claim 8, wherein a guide groove is formed in the movable rod, a sealing head is fixedly connected to the outer side of the bottom end of the movable rod, the sealing head is matched with the tail end of the water pipe in shape, and the pressing frame is sleeved on the inner side of the guide groove.
10. The quantitative sampling device for water quality analysis according to claim 9, wherein the inner side of the guide groove is provided with a C-shaped area, the position of the C-shaped area in the guide groove is gradually increased, and the increased distance value between the adjacent guide grooves is the same as the increased distance value between the adjacent second gears.

Description

Quantitative sampling device for water quality analysis Technical Field The invention relates to the technical field of water quality analysis, in particular to a quantitative sampling device for water quality analysis. Background The water quality analysis is a key link in the fields of environmental monitoring, hydrogeology, aquaculture, industrial production and the like, the accuracy of the water quality analysis directly depends on the representativeness of the collected water sample, and in practical application, the water quality analysis is particularly aimed at heterogeneous water bodies such as lakes, reservoirs, rivers, oceans, deep wells and the like, and the water quality parameters of the water quality analysis often show obvious vertical layering or gradient change along with the depth. Therefore, obtaining in-situ water samples with accurate and undisturbed positions at different specific depths is important for researching spatial distribution of physical and chemical properties of water, tracking vertical migration of pollutants, evaluating health conditions of aquatic ecosystems and performing accurate resource management, at present, a common layered sampling device, such as a one-shot water sampler, can collect water samples at set depths, but usually can only obtain discrete samples at one or a limited depth by one-time descending, and if continuous sampling of a water area is to be completed, operations of rope winding and unwinding, triggering, recycling, cleaning and the like need to be repeatedly performed, the flow is complicated, time and labor are consumed, human errors and cross contamination risks are easily introduced in multiple operations, and in addition, the existing device mostly lacks an effective isolation mechanism for mixing surface water in the sampling process and possibly contaminates lower samples. Disclosure of Invention The invention aims to solve the technical problems of complicated layered sampling operation, low efficiency, easy cross contamination and surface water mixing in the existing sampling device. In order to solve the technical problems, the invention provides the following technical scheme: A quantitative sampling device for water quality analysis comprises a chassis, wherein a fixing frame is fixedly connected to the chassis, an electric telescopic rod is symmetrically arranged at the top of the fixing frame, a servo motor is fixedly connected to the bottom end of a movable end of the electric telescopic rod, a first gear is fixedly connected to the tail end of a driving shaft of the servo motor, a movable frame is rotatably connected to the bottom end of the first gear through a connecting rod and a bearing seat, a pressing frame is fixedly connected to the bottom end of the movable frame, a positioning seat which is uniformly distributed is fixedly arranged on the chassis, a through opening is formed in the bottom of the chassis, a sampling tube is sleeved on the inner side of the positioning seat, a water pipe is fixedly connected to the bottom end of the sampling tube, an extraction assembly is arranged in the sampling tube and used for forming negative pressure in the sampling tube, the extraction assembly comprises a piston sleeved inside the sampling tube, the outer ring part of the piston is mutually attached to the inner side wall of the sampling tube, the top end of the extraction assembly extends to the outer side of the sampling tube and is provided with a second gear, the sampling tube and the four groups of the four second gears are gradually raised in height on the sampling tube, a middle part of the chassis is fixedly connected with a sealing assembly which is uniformly distributed, and the outer side of the sealing assembly is used for sealing the end opening of the sealing the water pipe and comprises a sealing rod fixedly connected with the sealing outer side of the sealing rod. Optionally, the bottom of the first gear is fixedly connected with the top of the connecting rod, the bottom of the connecting rod is fixedly connected with the inner side wall of the bearing seat, and the outer part of the bearing seat is fixedly connected with the top of the movable frame. Optionally, an opening facing the movable rod is formed in the outer portion of the positioning seat, a fastening bolt is connected to the outer portion of the positioning seat in a threaded mode, and a thread groove matched with the fastening bolt in shape is formed in the outer portion of the sampling tube. Optionally, the bottom of the sampling tube is provided with a base encircling the outer side of the water tube, an opening facing the movable rod is formed in the base, and the tail end of the water tube penetrates through the opening and extends to the outer side of the sampling tube. Optionally, the top fixedly connected with screwed pipe of piston, the top of sampling tube is connected with the threaded rod through the bearing rotation, threaded connection