CN111076981A - Deep water sampling mechanism for laboratory sewage detection and sampling method thereof - Google Patents

Deep water sampling mechanism for laboratory sewage detection and sampling method thereof Download PDF

Info

Publication number
CN111076981A
CN111076981A CN201911410395.1A CN201911410395A CN111076981A CN 111076981 A CN111076981 A CN 111076981A CN 201911410395 A CN201911410395 A CN 201911410395A CN 111076981 A CN111076981 A CN 111076981A
Authority
CN
China
Prior art keywords
sampling mechanism
water
vacuum chamber
negative pressure
chamber
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.)
Granted
Application number
CN201911410395.1A
Other languages
Chinese (zh)
Other versions
CN111076981B (en
Inventor
张可
徐攀
孙云龙
王杨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Zhike Detection Technology Co ltd
Original Assignee
Jiangsu Qichen Testing Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jiangsu Qichen Testing Technology Co ltd filed Critical Jiangsu Qichen Testing Technology Co ltd
Priority to CN201911410395.1A priority Critical patent/CN111076981B/en
Publication of CN111076981A publication Critical patent/CN111076981A/en
Application granted granted Critical
Publication of CN111076981B publication Critical patent/CN111076981B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/10Devices for withdrawing samples in the liquid or fluent state
    • G01N1/14Suction devices, e.g. pumps; Ejector devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/10Devices for withdrawing samples in the liquid or fluent state
    • G01N1/16Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/02Devices for withdrawing samples
    • G01N1/10Devices for withdrawing samples in the liquid or fluent state
    • G01N1/14Suction devices, e.g. pumps; Ejector devices
    • G01N2001/1418Depression, aspiration
    • G01N2001/1427Positive displacement, piston, peristaltic

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a deepwater sampling mechanism for laboratory sewage detection, which comprises an underwater suspension rope, wherein the tail end of the underwater suspension rope is connected with a deepwater sampling mechanism, and the deepwater sampling mechanism can automatically sample after sinking to a preset depth below the liquid level under the traction of the underwater suspension rope; the deepwater sampling mechanism comprises a vertical barrel, a top cover is fixedly and hermetically arranged at the top of the barrel, and the lower end of the underwater suspension rope is fixedly connected with the top cover; a balance weight is connected below the cylinder body; the structure of the invention omits electronic control, and the mechanism is a pure mechanical structure, thereby avoiding the need of making a high-cost sampling mechanism with high waterproof grade for electronic components in deepwater sampling.

Description

Deep water sampling mechanism for laboratory sewage detection and sampling method thereof
Technical Field
The invention belongs to the field of sewage detection.
Background
The pollutant detection of deep water sample can better reflect the pollution accumulation degree of the water body, the opening of an underwater electronic valve needs to be controlled at the bank side in the existing sewage sample, electronic devices need to be used, and due to the deep water sample, the waterproof grade of the product needs to be high, so that the cost is huge.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a deep water sampling mechanism for laboratory sewage detection without an electronic device and a sampling method thereof.
The technical scheme is as follows: in order to achieve the purpose, the deepwater sampling mechanism for laboratory sewage detection comprises an underwater suspension rope, wherein the tail end of the underwater suspension rope is connected with the deepwater sampling mechanism, and the deepwater sampling mechanism can automatically sample after sinking to a preset depth below the liquid level under the traction of the underwater suspension rope.
Further, the deepwater sampling mechanism comprises a vertical cylinder, a top cover is fixedly and hermetically arranged at the top of the cylinder, and the lower end of the underwater suspension rope is fixedly connected with the top cover; and a balance weight is connected below the cylinder body.
Further, a piston channel is arranged in the cylinder body, and an upper piston and a lower piston are coaxially and movably arranged in the piston channel; the upper side of the upper piston is provided with a closed air chamber, a movable vacuum chamber is arranged between the upper piston and the lower piston, and the lower side of the lower piston is provided with a hydraulic chamber; the lower end of the hydraulic chamber is communicated with the outside;
the upper piston and the lower piston are fixedly connected through a connecting rod with the same axle center; the lower piston is fixedly connected with the balance weight through a vertical suspension rod.
Furthermore, an annular limiting inner edge is integrally arranged on the inner wall of the upper end of the hydraulic chamber, and the lower end surface of the lower piston contacts with the upper surface of the limiting inner edge.
Further, a hollow channel is coaxially arranged inside the suspension rod, and the upper end of the hollow channel extends to the middle height of the connecting rod; a liquid outlet hole is formed in the middle of the connecting rod, and the liquid outlet hole enables the middle of the movable vacuum chamber and the top end of the hollow channel to be communicated with each other; a liquid suction bent channel is arranged inside the balance weight, one end of the liquid suction bent channel is a liquid suction port, and the liquid suction port is positioned on the upper surface of the balance weight; the other end of the liquid suction port is communicated with the lower end of the hollow channel;
an annular sealing sleeve is movably sleeved at the middle height of the connecting rod, and the inner wall of the sealing sleeve seals the liquid outlet; the outer wall of the seal sleeve is fixedly supported and connected with the inner wall of the movable vacuum chamber through a support rod; after the connecting rod and the sealing sleeve relatively slide along the axis direction, the sealing sleeve can be separated from the liquid outlet hole.
Furthermore, the inner wall of the sealing sleeve is made of silica gel sealing materials.
Furthermore, the lower end of the balance weight is coaxially connected with a threaded rod extending downwards; the water-saving screw rod is characterized by further comprising a plurality of different weight balancing weights, each weight balancing weight is of a disc structure with the density larger than water, a threaded hole is formed in the axis of each weight balancing weight and is coaxial with the axis, and the weight balancing weights can be screwed down on the threaded rod through the threaded holes.
Further, a hard air pressure balance pipe is connected to the top cover, one end of the air pressure balance pipe is communicated with the outside, and the other end of the air pressure balance pipe is communicated with the upper end of the closed air chamber; the air pressure balance pipe is also provided with a manual ball valve; and the top cover is also provided with a barometer, and the barometer can detect the air pressure in the sealed air chamber.
Further, the side wall of the cylinder body is also fixedly connected with a hard negative pressure suction pipe, one end of the negative pressure suction pipe is communicated with the outside, the other end of the negative pressure suction pipe is communicated with the middle part of the movable vacuum chamber, and a one-way valve is arranged in the negative pressure suction pipe; the fluid in the vacuum chamber can flow out from the negative pressure suction pipe through the one-way valve, and the external fluid cannot flow into the vacuum chamber through the one-way valve.
Further, the sampling method of the deepwater sampling mechanism for laboratory sewage detection comprises the following steps:
firstly, opening a ball moving valve at the bank of a sampled water body, communicating an atmospheric environment with a closed air chamber through an air pressure balance pipe so as to keep the closed air chamber consistent with atmospheric pressure, and then pulling a balance weight downwards so as to enable an upper piston and a lower piston to move downwards in the same direction until the lower end surface of the lower piston contacts the upper surface of the limiting inner edge, and at the moment, the inner wall of a sealing sleeve just blocks a liquid outlet;
then manually closing the manual ball valve, so that the closed air chamber is restored to a closed state again, and the air pressure in the closed air chamber is consistent with the ambient air pressure;
step two, installing a counterweight with corresponding weight according to the target depth, wherein the heavier the counterweight is, the deeper the expected sampling depth is;
continuously sucking away air in the movable vacuum chamber through a negative pressure suction pipe by an external negative pressure machine, so that a negative pressure environment is formed in the movable vacuum chamber; then taking off the external negative pressure machine, wherein the movable vacuum chamber is in a negative pressure vacuum state relative to the external atmospheric pressure, and at the moment, due to the existence of the one-way valve, external air cannot enter the movable vacuum chamber through the negative pressure suction pipe;
fourthly, the deepwater sampling mechanism is sunk into a water body to be sampled under the traction of the underwater suspension rope, and along with the integral sinking of the deepwater sampling mechanism, the deeper the water is, the higher the water pressure in the water pressure chamber is, and after the water depth reaches a preset depth, the upward thrust of the water pressure in the water pressure chamber on the lower piston is enough to overcome the gravity of a counterweight and the static friction force borne by the upper piston, the lower piston and the sealing sleeve; at the moment, the lower piston is pushed by water pressure to move upwards for a certain distance, the upward movement of the lower piston can drive the connecting rod, the upper piston and the movable vacuum chamber to synchronously move upwards for a certain distance, and the sealing sleeve cannot change position due to the constraint of the supporting rod, so that the connecting rod and the sealing sleeve relatively slide along the axial direction, and the sealing sleeve can be separated from the liquid outlet hole; the movable vacuum chamber is communicated with the water body at the depth through the hollow channel and the liquid suction bent channel; at the moment, water near the counter weight is sucked into the vacuum chamber through the hollow channel and the liquid suction bent channel under the action of negative pressure, so that a sewage sample at the depth is accumulated in the vacuum chamber;
step five, the underwater suspension rope pulls the deep water sampling mechanism upwards to the shore, and in the process that the deep water sampling mechanism is moved upwards, as the position of the deep water sampling mechanism is shallower and shallower, the water pressure in the water pressure chamber is automatically reduced, so that the sealing sleeve can be restored to the state of plugging the liquid outlet hole, and the deep water sampling mechanism is prevented from being diluted by water at the shallow position in the process of pulling upwards;
and step six, after the deepwater sampling mechanism is on the shore, the manual ball valve is opened again for balancing air pressure, the balance weight is pushed to enable the sealing sleeve to be in a state of being separated from the liquid outlet hole, the vacuum chamber is enabled to return to normal pressure, water absorption is facilitated, then the barrel is adjusted to be suitable for posture, the side with the negative pressure suction pipe faces downwards, then an external liquid suction pump is adopted to suck out a sewage sample in the vacuum chamber through the negative pressure suction pipe, and all sampling procedures are completed.
Has the advantages that: the structure of the invention omits electronic control, and the mechanism is a pure mechanical structure, thus avoiding the need of making a high-cost sampling mechanism with high waterproof grade for electronic components in deepwater sampling; in the process that the deepwater sampling mechanism is pulled upwards to the shore by the underwater suspension rope, as the position of the deepwater sampling mechanism is shallower and shallower, the water pressure in the water pressure chamber is automatically reduced, and the sealing sleeve is restored to the state of plugging the liquid outlet hole, so that the deepwater sampling mechanism 22 is prevented from being diluted by water at the shallow position in the process of pulling upwards, and the reliability of a sample is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the device;
FIG. 2 is a schematic structural diagram of a deepwater sampling mechanism;
FIG. 3 is a schematic view of the lower portion of FIG. 2;
FIG. 4 is an overall cross-sectional view of the deep water sampling mechanism;
FIG. 5 is an enlarged view of the middle portion of FIG. 4;
FIG. 6 is a schematic structural view of the upper piston, the lower piston, the connecting rod, the counterweight and the suspension rod after being connected with each other.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The deepwater sampling mechanism for laboratory sewage detection as shown in fig. 1 to 6 comprises an underwater suspension rope 23, the end of the underwater suspension rope 23 is connected with a deepwater sampling mechanism 22, and the deepwater sampling mechanism 22 automatically samples after sinking to a preset depth below a liquid level 24 under the traction of the underwater suspension rope 23.
The deepwater sampling mechanism 22 comprises a vertical cylinder 3, a top cover 41 is fixedly and hermetically arranged at the top of the cylinder 3, and the lower end of the underwater suspension rope 23 is fixedly connected with the top cover 41; a counterweight 7 is connected below the cylinder 3.
A piston channel is arranged in the cylinder 3, and an upper piston 1 and a lower piston 5 are coaxially and movably arranged in the piston channel; the upper side of the upper piston 1 is provided with a closed air chamber 2, a movable vacuum chamber 4 is arranged between the upper piston 1 and the lower piston 5, and the lower side of the lower piston 5 is provided with a hydraulic chamber 6; the lower end of the hydraulic chamber 6 is communicated with the outside;
the upper piston 1 is fixedly connected with the lower piston 5 through a connecting rod 17 with the same axle center; the lower piston 5 and the counterweight 7 are fixedly connected through a vertical suspension rod 18.
An annular limiting inner edge 19 is integrally arranged on the inner wall of the upper end of the hydraulic chamber 6, and the lower end surface of the lower piston 5 contacts the upper surface of the limiting inner edge 19.
A hollow channel 15 is coaxially arranged inside the suspension rod 18, and the upper end of the hollow channel 15 extends to the middle height of the connecting rod 17; a liquid outlet 14 is arranged at the middle height of the connecting rod 17, and the liquid outlet 14 is used for communicating the middle part of the movable vacuum chamber 4 with the top end of the hollow channel 15; a liquid suction bent channel 21 is arranged inside the counterweight 7, one end of the liquid suction bent channel 21 is a liquid suction port 20, and the liquid suction port 20 is positioned on the upper surface of the counterweight 7; the other end of the liquid suction port 20 is communicated with the lower end of the hollow channel 15;
an annular sealing sleeve 16 is movably sleeved at the middle height of the connecting rod 17 of the embodiment, and in order to ensure the sealing effect, the inner wall of the sealing sleeve 16 of the embodiment is made of a silica gel sealing material; the inner wall of the sealing sleeve 16 blocks the liquid outlet 14; the outer wall of the sealing sleeve 16 is fixedly supported and connected with the inner wall of the movable vacuum chamber 4 through a support rod 13; after the connecting rod 17 and the sealing sleeve 16 relatively slide along the axial direction, the sealing sleeve 16 can be separated from the liquid outlet hole 14.
The lower end of the counterweight 7 is coaxially connected with a threaded rod 9 extending downwards; still include the different counter weight 8 of a plurality of weight, each counter weight 8 is greater than the disc structure of water for density, and the axle center department of counter weight 8 is provided with screw hole 10 with the axle center, and counter weight 8 can be screwed up on threaded rod 9 through screw hole 10.
The top cover 41 is connected with a hard air pressure balance pipe 26, one end of the air pressure balance pipe 26 is communicated with the outside, and the other end is communicated with the upper end of the closed air chamber 2; the air pressure balance pipe 26 is also provided with a manual ball valve 27; the top cover 41 is also provided with an air pressure gauge 25, and the air pressure gauge 25 can detect the air pressure in the closed air chamber 2.
The side wall of the cylinder 3 of the embodiment is also fixedly connected with a hard negative pressure suction pipe 12, one end of the negative pressure suction pipe 12 is communicated with the outside, the other end of the negative pressure suction pipe 12 is communicated with the middle part of the movable vacuum chamber 4, and a one-way valve 11 is arranged in the negative pressure suction pipe 12; the fluid in the vacuum chamber 4 can flow out from the negative pressure suction pipe 12 through the check valve 11, and the external fluid cannot flow into the vacuum chamber 4 through the check valve 11.
The sampling method and the working principle of the deepwater sampling mechanism of the device comprise the following steps:
firstly, opening a manual ball valve 27 at the bank of a sampled water body, communicating the atmospheric environment with a closed air chamber 2 through an air pressure balance pipe 26 so as to keep the closed air chamber 2 consistent with the atmospheric pressure, and then pulling a balance weight 7 downwards so as to enable an upper piston 1 and a lower piston 5 to displace downwards together until the lower end surface of the lower piston 5 contacts the upper surface of a limiting inner edge 19, and at the moment, the inner wall of a sealing sleeve 16 just blocks a liquid outlet hole 14;
then manually closing the manual ball valve 27, so that the closed air chamber 2 is restored to the closed state again, and the air pressure in the closed air chamber 2 is consistent with the ambient air pressure;
step two, installing a counterweight 8 with corresponding weight according to the target depth, wherein the heavier the counterweight 8 is, the deeper the expected sampling depth is;
continuously sucking away the air in the movable vacuum chamber 4 through a negative pressure suction pipe 12 by an external negative pressure machine, so as to form a negative pressure environment in the movable vacuum chamber 4; then taking off the external negative pressure machine, wherein the interior of the movable vacuum chamber 4 is in a negative pressure vacuum state relative to the external atmospheric pressure, and at the moment, due to the existence of the one-way valve 11, external air cannot enter the movable vacuum chamber 4 through the negative pressure suction pipe 12;
fourthly, the deepwater sampling mechanism 22 is sunk into a water body to be sampled under the traction of the underwater suspension rope 23, along with the integral sinking of the deepwater sampling mechanism 22, as the deeper the water is, the larger the water pressure in the water pressure chamber 6 is, and after the water depth reaches a preset depth, the upward thrust of the water pressure in the water pressure chamber 6 on the lower piston 5 is enough to overcome the gravity of the counterweight 8 and the counterweight 7 and the static friction force borne by the upper piston 1, the lower piston 5 and the sealing sleeve 16; at the moment, the lower piston 5 is pushed by water pressure to move upwards for a certain distance, the upward movement of the lower piston 5 can drive the connecting rod 17, the upper piston 1 and the movable vacuum chamber 4 to synchronously move upwards for a certain distance, and the sealing sleeve 16 cannot change position due to the constraint of the supporting rod 13, so that the connecting rod 17 and the sealing sleeve 16 relatively slide along the axial direction, and the sealing sleeve 16 can be separated from the liquid outlet hole 14; the movable vacuum chamber 4 is communicated with the water body at the depth through the hollow channel 15 and the liquid suction bending channel 21; at the moment, water near the counterweight 7 is sucked into the vacuum chamber 4 through the hollow channel 15 and the liquid suction bent channel 21 under the action of negative pressure, so that a sewage sample at the depth is accumulated in the vacuum chamber 4;
step five, the underwater suspension rope 23 pulls the deep water sampling mechanism 22 upwards to the shore, and in the process that the deep water sampling mechanism 22 is moved upwards, as the position of the deep water sampling mechanism 22 is shallower and shallower, the water pressure in the water pressure chamber 6 is automatically reduced, so that the sealing sleeve 16 is restored to the state of blocking the liquid outlet hole 14, and the deep water sampling mechanism 22 is prevented from being diluted by water at the shallow position in the process of pulling upwards;
and step six, after the deepwater sampling mechanism 22 is on the shore, the manual ball valve 27 is opened again for balancing air pressure, the counterweight 7 is pushed to enable the sealing sleeve 16 to be in a state of being separated from the liquid outlet hole 14, the vacuum chamber 4 is enabled to return to normal pressure, water absorption is facilitated, then the cylinder body 3 is adjusted to be in a proper posture to enable one side with the negative pressure suction pipe 12 to face downwards, then an external liquid suction pump is adopted to suck out a sewage sample in the vacuum chamber 4 through the negative pressure suction pipe 12, and all sampling procedures are completed.
The above is only a preferred embodiment of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (8)

1. The deepwater sampling mechanism for laboratory sewage detection comprises an underwater suspension rope (23), wherein the tail end of the underwater suspension rope (23) is connected with a deepwater sampling mechanism (22), and the deepwater sampling mechanism (22) can automatically sample after sinking to a preset depth below a liquid level (24) under the traction of the underwater suspension rope (23);
the deepwater sampling mechanism (22) comprises a vertical cylinder (3), a top cover (41) is fixedly and hermetically arranged at the top of the cylinder (3), and the lower end of the underwater suspension rope (23) is fixedly connected with the top cover (41); a balance weight (7) is connected below the barrel (3), and the lower end of the balance weight (7) is coaxially connected with a threaded rod (9) extending downwards; the water-cooled water tank is characterized by further comprising a plurality of counterweight weights (8) with different weights, wherein each counterweight weight (8) is of a disc structure with the density larger than that of water, a threaded hole (10) is formed in the axle center of each counterweight weight (8) in a coaxial mode, and the counterweight weights (8) can be screwed on the threaded rod (9) through the threaded holes (10).
2. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 1, wherein: a piston channel is arranged in the cylinder body (3), and an upper piston (1) and a lower piston (5) are coaxially and movably arranged in the piston channel; the upper side of the upper piston (1) is provided with a closed air chamber (2), a movable vacuum chamber (4) is arranged between the upper piston (1) and the lower piston (5), and the lower side of the lower piston (5) is provided with a water pressure chamber (6); the lower end of the hydraulic chamber (6) is communicated with the outside;
the upper piston (1) is fixedly connected with the lower piston (5) through a connecting rod (17) with the same axis; the lower piston (5) is fixedly connected with the counterweight (7) through a vertical suspension rod (18).
3. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 2, wherein: the top cover (41) is connected with a hard air pressure balance pipe (26), one end of the air pressure balance pipe (26) is communicated with the outside, and the other end of the air pressure balance pipe is communicated with the upper end of the closed air chamber (2); the air pressure balance pipe (26) is also provided with a manual ball valve (27); still install barometer (25) on top cap (41), barometer (25) can detect the atmospheric pressure in airtight air chamber (2).
4. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 3, wherein: an annular limiting inner edge (19) is integrally arranged on the inner wall of the upper end of the hydraulic chamber (6), and the lower end face of the lower piston (5) is in contact with the upper surface of the limiting inner edge (19).
5. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 4, wherein: a hollow channel (15) is coaxially arranged inside the suspension rod (18), and the upper end of the hollow channel (15) extends to the middle height of the connecting rod (17); a liquid outlet (14) is formed in the middle of the connecting rod (17), and the liquid outlet (14) is used for communicating the middle of the movable vacuum chamber (4) with the top end of the hollow channel (15); a liquid suction bent channel (21) is arranged inside the counterweight (7), a liquid suction port (20) is formed at one end of the liquid suction bent channel (21), and the liquid suction port (20) is located on the upper surface of the counterweight (7); the other end of the liquid suction port (20) is communicated with the lower end of the hollow channel (15);
an annular sealing sleeve (16) is movably sleeved at the middle height of the connecting rod (17), and the inner wall of the sealing sleeve (16) blocks the liquid outlet hole (14); the outer wall of the sealing sleeve (16) is fixedly supported and connected with the inner wall of the movable vacuum chamber (4) through a support rod (13); after the connecting rod (17) and the sealing sleeve (16) relatively slide along the axial direction, the sealing sleeve (16) can be separated from the liquid outlet hole (14).
6. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 5, wherein: the inner wall of the sealing sleeve (16) is made of silica gel sealing materials.
7. The deepwater sampling mechanism for laboratory sewage detection as claimed in claim 8, wherein: the side wall of the cylinder body (3) is also fixedly connected with a hard negative pressure suction pipe (12), one end of the negative pressure suction pipe (12) is communicated with the outside, the other end of the negative pressure suction pipe (12) is communicated with the middle part of the movable vacuum chamber (4), and a check valve (11) is arranged in the negative pressure suction pipe (12); the fluid in the vacuum chamber (4) can flow out from the negative pressure suction pipe (12) through the one-way valve (11), and the external fluid can not flow into the vacuum chamber (4) through the one-way valve (11).
8. The sampling method of the deepwater sampling mechanism for laboratory sewage detection is characterized in that: the method comprises the following steps:
firstly, opening a manual ball valve (27) at the bank of a sampling water body, communicating an atmospheric environment with a closed air chamber (2) through an air pressure balance pipe (26), so that the closed air chamber (2) keeps consistent with atmospheric pressure, and then pulling a balance weight (7) downwards, so that an upper piston (1) and a lower piston (5) are displaced downwards together until the lower end surface of the lower piston (5) contacts the upper surface of a limiting inner edge (19), and at the moment, the inner wall of a sealing sleeve (16) just blocks a liquid outlet hole (14);
then manually closing the manual ball valve (27), so that the closed air chamber (2) is restored to a closed state again, and the air pressure in the closed air chamber (2) is consistent with the ambient air pressure;
step two, installing a counterweight (8) with corresponding weight according to the target depth, wherein the heavier the counterweight (8), the deeper the expected sampling depth;
continuously sucking away air in the movable vacuum chamber (4) through a negative pressure suction pipe (12) by an external negative pressure machine, so that a negative pressure environment is formed in the movable vacuum chamber (4); then an external negative pressure machine is taken down, the interior of the movable vacuum chamber (4) is in a negative pressure vacuum state relative to the external atmospheric pressure, and at the moment, due to the existence of the one-way valve (11), external air cannot enter the movable vacuum chamber (4) through the negative pressure suction pipe (12);
fourthly, the deepwater sampling mechanism (22) is sunk into a water body to be sampled under the traction of the underwater suspension rope (23), along with the integral sinking of the deepwater sampling mechanism (22), as the water is deeper, the water pressure in the water pressure chamber (6) is also higher, and after the water depth reaches a preset depth, the upward thrust of the water pressure in the water pressure chamber (6) on the lower piston (5) is enough to overcome the gravity of the counterweight weight (8) and the counterweight (7) and the static friction force borne by the upper piston (1), the lower piston (5) and the sealing sleeve (16); at the moment, the lower piston (5) is pushed by water pressure to move upwards for a certain distance, the upward movement of the lower piston (5) can drive the connecting rod (17), the upper piston (1) and the movable vacuum chamber (4) to synchronously move upwards for a certain distance, and the sealing sleeve (16) cannot change in position due to the constraint of the supporting rod (13), so that the connecting rod (17) and the sealing sleeve (16) relatively slide along the axial direction, and the sealing sleeve (16) can be separated from the liquid outlet hole (14); the movable vacuum chamber (4) is communicated with the water body at the depth through the hollow channel (15) and the liquid suction bent channel (21); at the moment, water near the counterweight (7) is sucked into the vacuum chamber (4) through the hollow channel (15) and the liquid suction bent channel (21) under the action of negative pressure, so that a sewage sample at the depth is accumulated in the vacuum chamber (4);
fifthly, the deep water sampling mechanism (22) is pulled upwards to the shore by the underwater suspension rope (23), and in the process that the deep water sampling mechanism (22) moves upwards, as the position of the deep water sampling mechanism (22) is shallower and shallower, the water pressure in the water pressure chamber (6) is automatically reduced, so that the sealing sleeve (16) is restored to the state of plugging the liquid outlet hole (14), and the deep water sampling mechanism (22) is prevented from being diluted by water at the shallow position in the process of pulling upwards;
and sixthly, after the deepwater sampling mechanism (22) is on the shore, the manual ball valve (27) is opened again for balancing air pressure, the balance weight (7) is pushed to enable the sealing sleeve (16) to be in a state of being separated from the liquid outlet hole (14), the vacuum chamber (4) is enabled to recover normal pressure so as to be convenient for water absorption, then the barrel body (3) is adjusted to be in a proper posture so that one side with the negative pressure suction pipe (12) faces downwards, then an external liquid suction pump is adopted to suck out a sewage sample in the vacuum chamber (4) through the negative pressure suction pipe (12), and all sampling procedures are completed.
CN201911410395.1A 2019-12-31 2019-12-31 Deep water sampling mechanism for laboratory sewage detection and sampling method thereof Active CN111076981B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911410395.1A CN111076981B (en) 2019-12-31 2019-12-31 Deep water sampling mechanism for laboratory sewage detection and sampling method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911410395.1A CN111076981B (en) 2019-12-31 2019-12-31 Deep water sampling mechanism for laboratory sewage detection and sampling method thereof

Publications (2)

Publication Number Publication Date
CN111076981A true CN111076981A (en) 2020-04-28
CN111076981B CN111076981B (en) 2021-08-03

Family

ID=70321090

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911410395.1A Active CN111076981B (en) 2019-12-31 2019-12-31 Deep water sampling mechanism for laboratory sewage detection and sampling method thereof

Country Status (1)

Country Link
CN (1) CN111076981B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554556A (en) * 2024-01-12 2024-02-13 佳木斯大学 Gastric juice acidity detection device for digestive system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525643A1 (en) * 1995-07-14 1995-12-07 Ubv Umweltbuero Gmbh Vogtland Constant pressure fluid sample probe removal system for deep water sample
CN102879226A (en) * 2012-09-14 2013-01-16 大连理工大学 Piston type visible water sample collection instrument
CN103439149A (en) * 2013-09-14 2013-12-11 淮海工学院 Negative pressure pneumatic type automatic sampler for water sample in medium-deep layer
CN108760387A (en) * 2018-03-17 2018-11-06 宁夏大学 A kind of portable inland lake hydrophore
CN108844776A (en) * 2018-06-15 2018-11-20 深圳市水务规划设计院有限公司 Device for fetching water
CN109443856A (en) * 2019-01-02 2019-03-08 姚贺冬 A kind of designated depth water sampling device
CN208984399U (en) * 2018-09-28 2019-06-14 浙江碧峰环保科技有限公司 A kind of sewage sampling device
CN110243633A (en) * 2019-06-20 2019-09-17 皖西学院 A kind of water quality detection sample collecting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525643A1 (en) * 1995-07-14 1995-12-07 Ubv Umweltbuero Gmbh Vogtland Constant pressure fluid sample probe removal system for deep water sample
CN102879226A (en) * 2012-09-14 2013-01-16 大连理工大学 Piston type visible water sample collection instrument
CN103439149A (en) * 2013-09-14 2013-12-11 淮海工学院 Negative pressure pneumatic type automatic sampler for water sample in medium-deep layer
CN108760387A (en) * 2018-03-17 2018-11-06 宁夏大学 A kind of portable inland lake hydrophore
CN108844776A (en) * 2018-06-15 2018-11-20 深圳市水务规划设计院有限公司 Device for fetching water
CN208984399U (en) * 2018-09-28 2019-06-14 浙江碧峰环保科技有限公司 A kind of sewage sampling device
CN109443856A (en) * 2019-01-02 2019-03-08 姚贺冬 A kind of designated depth water sampling device
CN110243633A (en) * 2019-06-20 2019-09-17 皖西学院 A kind of water quality detection sample collecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117554556A (en) * 2024-01-12 2024-02-13 佳木斯大学 Gastric juice acidity detection device for digestive system
CN117554556B (en) * 2024-01-12 2024-05-10 佳木斯大学 Gastric juice acidity detection device for digestive system

Also Published As

Publication number Publication date
CN111076981B (en) 2021-08-03

Similar Documents

Publication Publication Date Title
CN109632377B (en) Lake bottom sludge sampler and collection method thereof
CN201285353Y (en) Water sample collector with predetermined depth
CN110530674B (en) Lake deep water quality monitoring sample extraction element
CN112611604B (en) Marine phytoplankton sampling device
CN111076981B (en) Deep water sampling mechanism for laboratory sewage detection and sampling method thereof
CN106939599B (en) Suction anchor rod device
CN113082775A (en) Chemical solution separating tank
CN211904760U (en) Laboratory sewage detection's sampling mechanism
CN111521438A (en) Sampling device for water quality detection and using method
CN111521437A (en) Deepwater sampling mechanism for water quality detection and using method thereof
CN117030965B (en) Floating water quality detection equipment for aquaculture
CN112781929A (en) Water quality sampling system for lake bottom unmanned ship system
CN202832507U (en) Mine gas-liquid separation pressure measurement device
US9067802B2 (en) Drainage device for closed chamber containing liquid
CN108535050A (en) One kind formula of being slidably connected takes liquid centrifuge tube
CN212031000U (en) Portable water sampler for shallow groundwater
CN215718941U (en) Negative pressure water discharging device
CN112414752A (en) Columnar mud sampler for river and sea water bottom
CN220084396U (en) Water quality sampling tube
CN215338953U (en) Self-triggering type sediment gravity sampling device
CN117288525B (en) Prospecting hole water sampling device
CN219830430U (en) Lubricating oil sampling detection device
CN219871305U (en) Water quality detection equipment for water area
CN219573625U (en) Sewage sampling device
CN102519438B (en) Water depth measuring instrument

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20240310

Address after: 330200 no.1069 Jinsha 1st Road, Xiaolan economic and Technological Development Zone, Nanchang County, Nanchang City, Jiangxi Province

Patentee after: JIANGXI ZHIKE DETECTION TECHNOLOGY Co.,Ltd.

Country or region after: China

Address before: 215000 Room 302, building 04, Northwest District, Suzhou nano City, No. 99, Jinjihu Avenue, Suzhou Industrial Park, Suzhou City, Jiangsu Province

Patentee before: JIANGSU QICHEN TESTING TECHNOLOGY Co.,Ltd.

Country or region before: China

TR01 Transfer of patent right