CN115014873B - Water quality monitoring stratified sampling device - Google Patents
Water quality monitoring stratified sampling device Download PDFInfo
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- CN115014873B CN115014873B CN202210026972.2A CN202210026972A CN115014873B CN 115014873 B CN115014873 B CN 115014873B CN 202210026972 A CN202210026972 A CN 202210026972A CN 115014873 B CN115014873 B CN 115014873B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/16—Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Abstract
The invention discloses a water quality monitoring layered sampling device, which comprises a sampling barrel, wherein a sampling tube penetrates through the middle part of the sampling barrel, the sampling tube is fixed with the sampling barrel, a plurality of partition plates are arranged in the sampling barrel, the partition plates are fixedly sleeved on the sampling tube, and the partition plates divide the sampling barrel into a plurality of sampling cavities; a water inlet is formed in the sampling pipe corresponding to the sampling cavity, and a water inlet valve is installed in the water inlet; a plugging plug is connected in the sampling tube in a sliding manner, a water inlet channel is formed in the plugging plug, a flow blocking mechanism is installed in the water inlet channel, and the flow blocking mechanism is matched with a water inlet valve; the sampling barrel wall that the sample chamber corresponds has seted up blast pipe and drain pipe on, all installs the valve on blast pipe and the drain pipe. The water quality monitoring stratified sampling device provided by the invention is provided with a plurality of independent sampling cavities, and can sample water samples of a plurality of depth layers at one time; the water inlet valve is arranged at the water inlet of the sampling cavity, so that water samples in other depth layers can be prevented from being mixed in the sampling process, and the accuracy of a water quality monitoring result is ensured.
Description
Technical Field
The invention relates to the technical field of water quality monitoring, in particular to a layered sampling device for water quality monitoring.
Background
The requirements of people on the quality of drinking water are continuously improved, and the water quality standard of the drinking water is correspondingly continuously developed and perfected. Water quality sampling is an important link of water quality monitoring, and accurate extraction of water body samples at specific time and spatial positions is required.
However, the existing water quality sampler can only take a sample with one depth every time, and water samples in other depth layers are easily mixed in the sampling process, so that the accuracy of a water quality monitoring result is influenced.
Disclosure of Invention
The invention aims to provide a water quality monitoring stratified sampling device to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a water quality monitoring stratified sampling device, which comprises a sampling barrel, wherein a sampling pipe penetrates through the middle part of the sampling barrel, the sampling pipe is fixedly connected with the sampling barrel, a plurality of partition plates are arranged in the sampling barrel, the partition plates are fixedly sleeved on the sampling pipe, and the sampling barrel is divided into a plurality of sampling cavities by the plurality of partition plates; a water inlet is formed in the sampling tube corresponding to the sampling cavity, the sampling tube is communicated with the sampling cavity through the water inlet, and a water inlet valve is installed in the water inlet; a seal plug is slidably connected in the sampling tube, a water inlet channel is formed in the seal plug, a flow choking mechanism is installed in the water inlet channel, and the flow choking mechanism is matched with the water inlet valve; the sampling cavity corresponds sampling bucket has seted up blast pipe and drain pipe on the bucket wall, the blast pipe with all install the valve on the drain pipe, the blast pipe is located the drain pipe top.
Preferably, the flow blocking mechanism comprises a fixed pipe fixed on the plugging plug, a movable rod is slidably sleeved in the fixed pipe, one end, far away from the fixed pipe, of the movable rod is fixedly connected with a connecting rod, the tail end of the connecting rod is fixedly connected with a pushing head, the length of the movable rod is not more than the length of the pushing head, a gap is formed between the pushing head and the water inlet channel, and the pushing head is abutted against the inner wall of the sampling pipe; the fixed pipe is sleeved with a first spring, and two ends of the first spring are fixedly connected with the movable rod and the seal plug respectively.
Preferably, the water inlet valve comprises a water inlet pipe fixedly connected in the water inlet, a first fixing plate and a second fixing plate are fixedly connected to two ends of the interior of the water inlet pipe respectively, the second fixing plate is located at one end, close to the sampling pipe, of the water inlet pipe, and water inlet holes are formed in the first fixing plate and the second fixing plate respectively; a plugging plate is arranged between the first fixing plate and the second fixing plate and is in sliding connection with the water inlet pipe, a pushing rod is fixedly connected to the plugging plate, the tail end of the pushing rod penetrates through the second fixing plate and is fixedly connected with a pressing head, a gap is formed between the pressing head and the inner wall of the water inlet pipe, and the pressing head is matched with the pushing head; the plugging plate is provided with a water inlet hole, and the water inlet hole on the plugging plate and the water inlet hole on the second fixing plate are arranged in a staggered manner; one side fixedly connected with second spring that the shutoff board kept away from the second fixed plate, the end of second spring with first fixed plate fixed connection.
Preferably, the pushing head and the pressing head are both of a hemispherical structure.
Preferably, the pushing head and the pressing head are both provided with water passing holes, and the water passing holes in the pushing head and the water passing holes in the pressing head are correspondingly arranged.
Preferably, both ends of the inner part of the sampling tube are fixed with limiting blocks, and the sealing plug is in limiting fit with the limiting blocks.
Preferably, the filter screen is installed to the sampling tube bottom, sampling tube top fixedly connected with air supply pipe, the terminal intercommunication of air supply pipe has the air pump, install the valve on the air supply pipe.
Preferably, the sampling bucket bottom fixedly connected with counter weight base, sampling bucket top fixedly connected with support frame, support frame top fixedly connected with riser, the air supply pipe cover is established in the riser.
Preferably, the valve on the exhaust pipe is an electromagnetic valve.
The invention discloses the following technical effects: the water quality monitoring stratified sampling device provided by the invention is provided with a plurality of independent sampling cavities, and can sample water samples of a plurality of depth layers at one time; and the water inlet valve is arranged at the water inlet of the sampling cavity, so that water samples of other depth layers can be prevented from being mixed in the sampling process, and the accuracy of a water quality monitoring result is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a water quality monitoring stratified sampling device according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
the sampling device comprises a sampling barrel-1, a sampling tube-2, a partition plate-3, a sealing plug-4, an exhaust pipe-5, a drain pipe-6, a fixed pipe-7, a movable rod-8, a connecting rod-9, a pushing head-10, a first spring-11, a water inlet pipe-12, a first fixed plate-13, a second fixed plate-14, a sealing plate-15, a pushing rod-16, a pressing head-17, a second spring-18, a limiting block-19, a filter screen-20, a gas supply pipe-21, a counterweight base-22, a supporting frame-23, a lifting pipe-24, a baffle-25, a sealing plate-26, a vertical plate-27, a third spring-28 and a shifting rod-29.
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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a water quality monitoring stratified sampling device, which comprises a sampling barrel 1, wherein a sampling tube 2 penetrates through the middle part of the sampling barrel 1, the sampling tube 2 is fixedly connected with the sampling barrel 1, two clapboards 3 are arranged in the sampling barrel 1, the clapboards 3 are fixedly sleeved on the sampling tube 2, and the sampling barrel 1 is divided into three sampling cavities by the two clapboards 3; a water inlet is formed in the sampling tube 2 corresponding to the sampling cavity, the sampling tube 2 is communicated with the sampling cavity through the water inlet, and a water inlet valve is installed in the water inlet; a plugging plug 4 is connected in the sampling tube 2 in a sliding manner, a water inlet channel is formed in the plugging plug 4, a flow choking mechanism is installed in the water inlet channel, and the flow choking mechanism is matched with the water inlet valve; for guaranteeing that the shutoff 4 can not take place to rotate at the slip in-process, and then guarantee the intercommunication of inhalant canal and water inlet, the cross sectional shape of sampling tube 2 selects to be polygonized structure, has seted up blast pipe 5 and drain pipe 6 on the sampling barrel 1 bucket wall that the sample chamber corresponds, all installs the valve on blast pipe 5 and the drain pipe 6, and blast pipe 5 is located drain pipe 6 top, and the valve on the blast pipe 5 is the solenoid valve.
Furthermore, in order to conveniently control the position of the plugging plug 4 in the sampling tube 2, two ends of the inner part of the sampling tube 2 are respectively fixed with a limiting block 19, and the plugging plug 4 is in limiting fit with the limiting blocks 19; the top end of the sampling tube 2 is fixedly connected with an air supply tube 21, the tail end of the air supply tube 21 is communicated with an air pump, and a valve is arranged on the air supply tube 21; for avoiding the impurity of great volume to block up sampling device in the water, install filter screen 20 in sampling tube 2 bottom.
Furthermore, stratified sampling is conveniently realized, and water samples of other depth layers are prevented from being mixed in the sampling process, the flow blocking mechanism comprises a fixed pipe 7 fixed on the sealing plug 4, a movable rod 8 is slidably sleeved in the fixed pipe 7, one end, far away from the fixed pipe 7, of the movable rod 8 is fixedly connected with a connecting rod 9, the tail end of the connecting rod 9 is fixedly connected with a pushing head 10, the length of the movable rod 8 is not more than that of the pushing head 10, a gap is formed between the pushing head 10 and the water inlet channel, and the pushing head 10 is abutted to the inner wall of the sampling pipe 2; a first spring 11 is sleeved outside the fixed pipe 7, and two ends of the first spring 11 are respectively and fixedly connected with the movable rod 8 and the plugging plug 4; the water inlet valve comprises a water inlet pipe 12 fixedly connected in a water inlet, a first fixing plate 13 and a second fixing plate 14 are fixedly connected to two ends of the interior of the water inlet pipe 12 respectively, the second fixing plate 14 is located at one end, close to the sampling pipe 2, of the water inlet pipe 12, and water inlet holes are formed in the first fixing plate 13 and the second fixing plate 14 respectively; a plugging plate 15 is arranged between the first fixing plate 13 and the second fixing plate 14, the plugging plate 15 is in sliding connection with the water inlet pipe 12, a push rod 16 is fixedly connected to the plugging plate 15, the tail end of the push rod 16 penetrates through the second fixing plate 14 and is fixedly connected with a pressing head 17, a gap is arranged between the pressing head 17 and the inner wall of the water inlet pipe 12, and the pressing head 17 is correspondingly matched with the pushing head 10; the plugging plate 15 is provided with water inlet holes, and the water inlet holes on the plugging plate 15 and the water inlet holes on the second fixing plate 14 are arranged in a staggered manner; the blocking plate 15 is fixedly connected with a second spring 18 at a side far away from the second fixing plate 14, and the tail end of the second spring 18 is fixedly connected with the first fixing plate 13.
Further, for guaranteeing to seal and block up 4 and can normally slide after a sample to carry out the sample next time, top pushing head 10 and press head 17 are half spherical structure, have all seted up the water hole on top pushing head 10 and the press head 17, and the water hole that crosses on the top pushing head 10 corresponds the setting with the water hole that crosses on the press head 17.
Further, in order to ensure the sealing effect of the sealing plug 4, a baffle plate 25 is fixedly connected to the water inlet end of the water inlet channel, a water inlet through hole is formed in the baffle plate 25, a sliding channel is formed in the baffle plate 25, a sealing plate 26 is slidably connected in the sliding channel, the sealing plate 26 is used for sealing the water inlet through hole, a vertical plate 27 is fixedly connected to one end, close to the sampling tube 2, of the sealing plate 26, a third spring 28 is fixedly connected to one side, away from the sealing plate 26, of the vertical plate 27, and the tail end of the third spring 28 is fixedly connected with the baffle plate 25; a poke rod 29 is fixedly connected to the connecting rod 9, and the poke rod 29 is in limit fit with the vertical plate 27.
Further, for improving the sealed effect between shutoff stopper 4 and the sampling tube 2, the bottom of shutoff stopper 4 inlet channel is provided with the joint groove, and baffle 25 is located joint groove top, is provided with annular spring in the joint inslot, utilizes annular spring to stop the bottom butt of shutoff stopper 4 on the sampling tube 2 inner wall, improves the leakproofness of shutoff stopper 4 and sampling tube 2.
Further, in order to ensure that the sampling device can smoothly sink into a water body, the bottom end of the sampling barrel 1 is fixedly connected with a counterweight base 22, the top end of the sampling barrel 1 is fixedly connected with a support frame 23, the top end of the support frame 23 is fixedly connected with a lifting pipe 24, and an air supply pipe 21 is sleeved in the lifting pipe 24; a control cable is arranged in the lifting pipe 24, and an electromagnetic valve in the exhaust valve of the sampling barrel 1 is electrically connected with a controller through the control cable.
When the layered sampling device for water quality monitoring is used, high-pressure gas is injected into the sampling tube 2 through the gas supply tube 21, the plugging plug 4 slides to the lowest end of the sampling tube 2 under the action of the pressure gas, meanwhile, the high-pressure gas enters a sampling cavity through the water inlet valve on the sampling tube 2, then the valve on the gas supply tube 21 is closed, and then the sampling barrel 1 is sent into a water body through the lifting tube 24 for sampling. When a water body with a certain depth needs to be sampled, a valve on the air supply pipe 21 is opened, so that the air in the sampling pipe 2 is gradually decompressed, the plugging plug 4 gradually rises under the pressure action of the water body, when the air pressure in the sampling pipe 2 is reduced to a certain degree, the water inlet channel of the plugging plug 4 is aligned with the water inlet at the lowest end of the sampling pipe 2, the valve on the air supply pipe 21 is closed, at the moment, the pushing head 10 on the connecting rod 9 is popped out of the water inlet channel under the action of the first spring 11, the pressing head 17 and the plugging plate 15 move towards the direction of the first fixing plate 13 under the action of the pushing head 10, the second spring 18 is compressed, and the water inlet hole on the second fixing plate 14 is unblocked with the water inlet hole on the plugging plate 15; when connecting rod 9 removes, can drive poker rod 29 and remove, utilize poker rod 29 to promote vertical board 27 and remove, and then the position of inlet opening is putd aside to closing plate 26 under vertical board 27's effect, it is the unblocked state to make the inlet opening, high-pressure gas in the sample chamber can loop through inlet tube 12 this moment, the inhalant canal of shutoff stopper 4, sampling tube 2 bottom is discharged, then the solenoid valve on the blast pipe 5 that this sample chamber of control corresponds is opened, make the remaining gas in the sample chamber discharge by blast pipe 5, guarantee sample chamber and can normally take a sample, then the water sample of this degree of depth water layer can be got into by sampling tube 2 bottom, and get into sample chamber through inlet channel in the shutoff 4 and inlet tube 12 on the sampling tube 2.
When the water body at the next depth needs to be sampled, the electromagnetic valve on the exhaust pipe 5 of the sampling cavity is closed, the valve on the air supply pipe 21 is opened again, so that the gas in the sampling pipe 2 continues to be gradually decompressed, the plugging plug 4 gradually rises under the pressure action of the water body, at the moment, the pushing head 10 can retract into the water inlet channel of the plugging plug 4 in the upward moving process, the first spring 11 is compressed, meanwhile, under the action of the third spring 28, the sealing plate 26 continues to seal the water inlet through hole, the communication between the water inlet channel and the external water body is cut off by the sealing plate 26, the effective plugging length of the plugging plug 4 is ensured, meanwhile, the pressing head 17 and the plugging plate 15 move towards the direction of the second fixing plate 14 under the action of the second spring 18, and the plugging plate 15 is abutted to the second fixing plate 14, so that the water inlet hole on the plugging plate 15 and the water inlet hole on the second fixing plate 14 are in a plugging state, and the water layer at other depth is prevented from being mixed in the sampling cavity. When the gas pressure in the sampling tube 2 reduces to a certain degree, the water inlet passage of the plugging plug 4 aligns with the next water inlet of the sampling tube 2, and the water on the water layer with the depth can be sampled. After sampling tube 2 and sample chamber intercommunication this moment, utilize the high-pressure gas in the sample chamber can be with remaining water sample discharge in inlet tube 12, the inlet passage of shutoff stopper 4, the sampling tube 2, avoid sneaking into the water sample on other depth layers in the sample process.
The water quality monitoring stratified sampling device provided by the invention is provided with a plurality of independent sampling cavities, and can sample water samples of a plurality of depth layers at one time; and the water inlet valve is arranged at the water inlet of the sampling cavity, so that water samples in other depth layers can be prevented from being mixed in the sampling process, and the accuracy of a water quality monitoring result is ensured.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (6)
1. The water quality monitoring stratified sampling device is characterized by comprising a sampling barrel (1), wherein a sampling pipe (2) penetrates through the middle of the sampling barrel (1), a filter screen (20) is installed at the bottom end of the sampling pipe (2), an air supply pipe (21) is fixedly connected to the top end of the sampling pipe (2), the tail end of the air supply pipe (21) is communicated with an air pump, and a valve is installed on the air supply pipe (21); the sampling tube (2) is fixedly connected with the sampling barrel (1), a plurality of clapboards (3) are arranged in the sampling barrel (1), the clapboards (3) are fixedly sleeved on the sampling tube (2), and the plurality of clapboards (3) divide the sampling barrel (1) into a plurality of sampling cavities; a water inlet is formed in the sampling pipe (2) corresponding to the sampling cavity, the sampling pipe (2) is communicated with the sampling cavity through the water inlet, and a water inlet valve is installed in the water inlet; a sealing plug (4) is connected in the sampling tube (2) in a sliding manner, a water inlet channel is formed in the sealing plug (4), a flow choking mechanism is installed in the water inlet channel, and the flow choking mechanism is matched with the water inlet valve; an exhaust pipe (5) and a drain pipe (6) are arranged on the wall of the sampling barrel (1) corresponding to the sampling cavity, valves are respectively arranged on the exhaust pipe (5) and the drain pipe (6), and the exhaust pipe (5) is positioned above the drain pipe (6);
the flow blocking mechanism comprises a fixed pipe (7) fixed on the sealing plug (4), a movable rod (8) is sleeved in the fixed pipe (7) in a sliding mode, a connecting rod (9) is fixedly connected to one end, far away from the fixed pipe (7), of the movable rod (8), the tail end of the connecting rod (9) is fixedly connected with an ejector head (10), the length of the movable rod (8) is not larger than that of the ejector head (10), a gap is formed between the ejector head (10) and the water inlet channel, and the ejector head (10) abuts against the inner wall of the sampling pipe (2); a first spring (11) is sleeved outside the fixed pipe (7), and two ends of the first spring (11) are respectively and fixedly connected with the movable rod (8) and the seal plug (4);
a baffle (25) is fixedly connected to the water inlet end of the water inlet channel, a water inlet through hole is formed in the baffle (25), a sliding channel is formed in the baffle (25), a sealing plate (26) is connected in the sliding channel in a sliding mode, the sealing plate (26) is used for sealing the water inlet through hole, a vertical plate (27) is fixedly connected to one end, close to the sampling tube (2), of the sealing plate (26), a third spring (28) is fixedly connected to one side, far away from the sealing plate (26), of the vertical plate (27), and the tail end of the third spring (28) is fixedly connected with the baffle (25); a poke rod (29) is fixedly connected to the connecting rod (9), and the poke rod (29) is in limit fit with the vertical plate (27);
the water inlet valve comprises a water inlet pipe (12) fixedly connected in the water inlet, a first fixing plate (13) and a second fixing plate (14) are fixedly connected to two ends of the interior of the water inlet pipe (12) respectively, the second fixing plate (14) is located at one end, close to the sampling pipe (2), of the water inlet pipe (12), and water inlet holes are formed in the first fixing plate (13) and the second fixing plate (14); a plugging plate (15) is arranged between the first fixing plate (13) and the second fixing plate (14), the plugging plate (15) is connected with the water inlet pipe (12) in a sliding manner, a push rod (16) is fixedly connected to the plugging plate (15), the tail end of the push rod (16) penetrates through the second fixing plate (14) and is fixedly connected with a pressing head (17), a gap is formed between the pressing head (17) and the inner wall of the water inlet pipe (12), and the pressing head (17) is matched with the pushing head (10) oppositely; a water inlet hole is formed in the plugging plate (15), and the water inlet hole in the plugging plate (15) and the water inlet hole in the second fixing plate (14) are arranged in a staggered mode; one side of the blocking plate (15) far away from the second fixing plate (14) is fixedly connected with a second spring (18), and the tail end of the second spring (18) is fixedly connected with the first fixing plate (13).
2. The water quality monitoring stratified sampling device of claim 1, wherein the ejector head (10) and the pressing head (17) are both of a hemispherical structure.
3. The layered sampling device for water quality monitoring according to claim 2, wherein the pushing head (10) and the pressing head (17) are provided with water through holes, and the water through holes on the pushing head (10) and the water through holes on the pressing head (17) are correspondingly arranged.
4. The water quality monitoring stratified sampling device according to claim 1, wherein both ends of the interior of the sampling tube (2) are fixed with a limiting block (19), and the blocking plug (4) is in limiting fit with the limiting block (19).
5. The layered sampling device for water quality monitoring according to claim 1, wherein a counterweight base (22) is fixedly connected to the bottom end of the sampling barrel (1), a support frame (23) is fixedly connected to the top end of the sampling barrel (1), a lifting pipe (24) is fixedly connected to the top end of the support frame (23), and the air supply pipe (21) is sleeved in the lifting pipe (24).
6. The stratified sampling device for water quality monitoring as claimed in claim 1, wherein the valve on the exhaust pipe (5) is an electromagnetic valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210026972.2A CN115014873B (en) | 2022-01-11 | 2022-01-11 | Water quality monitoring stratified sampling device |
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| CN202210026972.2A CN115014873B (en) | 2022-01-11 | 2022-01-11 | Water quality monitoring stratified sampling device |
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| CN115014873A CN115014873A (en) | 2022-09-06 |
| CN115014873B true CN115014873B (en) | 2023-03-14 |
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