CN116105835B - Liquid level meter and sampling equipment - Google Patents
Liquid level meter and sampling equipment Download PDFInfo
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- CN116105835B CN116105835B CN202310340053.7A CN202310340053A CN116105835B CN 116105835 B CN116105835 B CN 116105835B CN 202310340053 A CN202310340053 A CN 202310340053A CN 116105835 B CN116105835 B CN 116105835B
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- 238000005070 sampling Methods 0.000 title claims abstract description 135
- 239000007788 liquid Substances 0.000 title claims abstract description 113
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 67
- 238000007789 sealing Methods 0.000 claims description 8
- 239000000284 extract Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000004140 cleaning Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 230000002572 peristaltic effect Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- -1 scale Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
- G01F23/72—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using magnetically actuated indicating means
-
- 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
-
- 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
-
- 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
- G01N2001/1418—Depression, aspiration
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention provides a liquid level meter and sampling equipment, wherein the liquid level meter comprises: the shell is provided with an inner cavity, a first port and a second port, wherein the first port and the second port are communicated with the inner cavity, the shell is provided with a first direction, one end of the shell in the first direction is provided with a magnetic reed switch, the first port is arranged at the side of the magnetic reed switch, and the second port is arranged at one side, far away from the magnetic reed switch, in the first direction; the floater is accommodated in the inner cavity and is provided with a magnetic piece; the inner cavity is used for containing liquid, the liquid level of the liquid changes along the first direction, and the floater floats on the liquid level and moves along the first direction along with the liquid level change of the liquid level; the sampling device comprises the liquid level meter. The liquid level meter and the sampling equipment provided by the invention solve the problems that the liquid level meter in the existing automatic water quality sampling equipment is easy to lose efficacy due to long-term use and needs frequent cleaning and maintenance.
Description
Technical Field
The invention relates to the technical field of water quality monitoring, in particular to a liquid level meter and sampling equipment.
Background
Along with the continuous deep construction of the ecological environment in China, the control of the discharge of water pollutants of a heavy point pollution source is further enhanced for well breaking up pollution control, an on-line monitoring system is required to be established at a pollution source discharge point for the inspection and monitoring of a water sample by an environmental protection supervision department, the sewage is monitored on line in real time, the water quality automatic sampler is used as a front end acquisition unit of the on-line monitoring system, but after the existing water quality automatic sampler is operated for a period of time, the liquid level meter is invalid, the liquid level meter is required to be regularly maintained, the maintenance frequency is higher, the maintenance cost of the automatic sampler is increased, and the all-weather monitoring of the pollution source discharge point by the environmental protection supervision department is also not facilitated.
The existing water quality automatic sampler liquid level meter is provided with a plurality of non-contact capacitance proximity switches, and after the water quality automatic sampler operates for a period of time, impurities such as scale or sludge are attached to the inner wall of a water pipe, so that the proximity switches always have signals, and at the moment, detection pipelines need to be cleaned and maintained. There are also few magnetic reed float switches, but the gap between the magnetic reed float switch float and the magnetic reed rod is smaller, and after the sampler operates for a period of time, the float is clamped at a certain position of the magnetic reed rod due to sediment, impurities and the like in the water sample, so that the magnetic reed float switch is always provided with a signal or is not provided with a signal, and the magnetic reed float switch is required to be cleaned and maintained at the moment.
Therefore, how to solve the problems that the liquid level meter in the automatic water quality sampling equipment is easy to fail due to long-term use and needs frequent cleaning and maintenance is needed is urgent to be researched.
Disclosure of Invention
The invention aims to provide a liquid level meter and sampling equipment, which are used for solving the problems that the liquid level meter in the existing automatic water quality sampling equipment is easy to fail due to long-term use and needs frequent cleaning and maintenance.
In order to achieve the above purpose, the present invention provides the following technical scheme:
a level gauge, the level gauge comprising:
the shell is provided with an inner cavity, a first port and a second port, wherein the first port and the second port are communicated with the inner cavity, the shell is provided with a first direction, one end of the shell in the first direction is provided with a magnetic reed switch, the first port is arranged at the side of the magnetic reed switch, and the second port is arranged at one side, far away from the magnetic reed switch, in the first direction; and
the floater is accommodated in the inner cavity and is provided with a magnetic piece;
the inner cavity is used for containing liquid, the liquid level of the liquid changes along the first direction, the floater floats on the liquid level and moves along the first direction along with the liquid level change of the liquid level, and the floater is close to the magnetic reed switch and enables the magnetic reed switch to be on, or is far away from the magnetic reed switch and enables the magnetic reed switch to be off.
In some embodiments of the invention, the housing comprises a shell and a cover;
the first port and the second port are formed in the shell;
the magnetic reed switch is arranged on the shell cover;
the shell cover is arranged on one side, far away from the second port, of the first direction, is connected with the shell body in a sealing mode, and further encloses the inner cavity.
In some embodiments of the present invention, a sinking groove is disposed on a side of the cover facing away from the housing, and the sinking groove accommodates the magnetic reed switch.
In some embodiments of the present invention, a funnel-shaped flow guiding portion is disposed on a side of the housing body away from the reed switch, and the housing body gradually transitions into the second port through the flow guiding portion.
In some embodiments of the present invention, a sealing ring is further disposed between the cover and the housing.
In order to achieve the above purpose, the present invention also provides the following technical solutions:
a sampling device for providing a water sample to a water quality analyzer, the sampling device comprising:
the liquid level meter comprises a first liquid level meter; and
a sampling barrel; and
the sampling pump is connected in series between the first port of the first liquid level meter and the sampling barrel; and
the sample feeding pump is connected with the sampling barrel in series; and
the sample conveying pipeline is connected with the sampling barrel in series through the sample conveying pump and is used for being connected with the water quality analyzer in series; and
the control module is electrically connected with the magnetic reed switch, the sampling pump and the sample feeding pump in the first liquid level meter;
the sampling pump pumps a water sample into the sampling barrel from the outside of the sampling equipment through the first liquid level meter, the sample feeding pump pumps the water sample into the sample feeding pipe from the sampling barrel, and the water quality analyzer extracts the water sample from the sample feeding pipe.
In some embodiments of the invention, the sampling device further comprises a first valve and a drain line;
the sampling barrel, the first valve and the drainage pipeline are sequentially connected in series;
the first valve is electrically connected with the control module.
In some embodiments of the invention, the level gauge further comprises a second level gauge;
the second port of the second liquid level meter is connected with the pipe feeding pipeline in series, and the first port of the second liquid level meter is connected with the drainage pipeline in series;
the control module is electrically connected with the magnetic reed switch in the second liquid level meter.
In some embodiments of the invention, the sampling device further comprises a second valve and a third valve;
the sampling barrels comprise a plurality of sampling barrels, each sampling barrel is connected with the sampling pump in series through the second valve, and each sampling barrel is connected with the sample feeding pump in series through the third valve;
the first valves comprise a plurality of sampling barrels, and each sampling barrel is connected in series with the drainage pipeline through a corresponding first valve;
the second valve and the third valve are electrically connected with the control module.
In some embodiments of the invention, the sampling device further comprises a fourth valve and a refrigerated compartment;
the fourth valve is connected in series between the pipe feeding pipeline and the refrigerating chamber;
the fourth valve is electrically connected with the control module.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the liquid level meter provided by the invention has the advantages of simple structure, high efficiency and reliability, and capability of stably serving in various hydrologic environments for a long time, and can obviously reduce the frequency of cleaning and maintenance; specifically, a water sample enters an inner cavity of the liquid level meter from a second port of the liquid level meter, when the capacity of the water sample in the inner cavity of the liquid level meter is gradually increased, the liquid level of the water sample in the inner cavity is gradually increased, a floater in the inner cavity floats on the liquid level of the water sample and gradually approaches a magnetic reed switch positioned at a higher position, the magnetic reed switch is conducted under the action of magnetic force of a magnetic piece arranged on the floater, and then a signal is fed back to a control module so as to inform the control module that the capacity of the water sample in the liquid level meter reaches a certain threshold value; in addition, the magnetic floater moves up and down along with the change of the liquid level, and the gap between the magnetic floater and the wall surface of the inner cavity can be designed to be larger, so that the magnetic floater is not easy to be blocked by impurities such as scale, sediment and the like, and therefore, the liquid level meter is not invalid when being applied to sampling equipment which operates for a long time, and the problems that the liquid level meter in the traditional automatic water quality sampling equipment is easy to be invalid due to blockage caused by long-time use and needs frequent cleaning and maintenance are solved.
2. The shell of the liquid level meter comprises a shell body and a shell cover, wherein the shell body and the shell cover are tightly matched and fixed through threads, so that an operator can conveniently take out a floater contained in an inner cavity or clean sundries mixed in the inner cavity.
3. The sampling equipment provided by the invention can be stably used for a long time in various hydrologic environments, and the frequency of daily cleaning and maintenance can be greatly reduced; specifically, a sampling pump pumps a water sample from a water sample sampling point through a first liquid level meter, pumps the water sample into a sampling barrel for temporary storage, then a sample feeding pump pumps the water sample from the sampling barrel, pumps the water sample to a water quality analyzer through a sample feeding pipeline, and performs water quality analysis operation on the water sample through the water quality analyzer; the first liquid level meter can obtain a timing reference of the sampling pump according to the position change of the floater in the inner cavity of the first liquid level meter, the sampling pump starts to operate for a certain period of time, the total amount of water samples pumped by the sampling pump in the specific time can be determined by presetting the flow rate and the operation period of the sampling pump, the sampling pump starts to blow back at the moment, so that the water samples in the inner cavity of the first liquid level meter are all discharged through the second port of the sampling pump, no water sample residues in a sample feeding pipeline are ensured, the floater in the inner cavity of the first liquid level meter is far away from the magnetic reed switch along with the falling of the water level, the magnetic reed switch is disconnected due to the loss of the influence of external magnetic force, and the water samples are pumped in the inner cavity of the first liquid level meter next time and the water level rises to a certain degree and then is conducted again, so that the timing reference is provided for the control module.
4. According to the sampling equipment provided by the invention, the water quality analyzer and the second liquid level meter are arranged in parallel, as the inner cavity of the second liquid level meter can accommodate a part of water sample, when the sample feeding pump works, a part of the water sample stored in the sampling barrel is fed into the water quality analyzer, and the other part of the water sample is fed into the second liquid level meter, so that the floater in the second liquid level meter is close to the magnetic reed switch along with the rising of the water level, the magnetic reed switch is conducted, and then a signal is fed back to the control module, and the control module further turns off the sample feeding pump, at the moment, the water quality analyzer can extract the water sample from the second liquid level meter and the sample feeding pipeline after the sample feeding pump is turned off, and after the water level in the inner cavity of the second liquid level meter is lowered, the floater is also lowered and is far away from the magnetic reed switch, the sample feeding pump is started again after a preset one end time, and the water sample is continuously fed into the sample feeding pipeline, so that the working time of the sample feeding pump in a sample feeding period can be shortened, and the service life of the sampling equipment is prolonged.
5. The sampling equipment provided by the invention is provided with a plurality of sampling barrels so as to meet various use requirements; specifically, which sampling barrel is to send the water sample to the water quality analyzer for water quality analysis can be realized by setting a specific program for the control module.
6. The sampling equipment provided by the invention is provided with the refrigerating chamber, and water samples collected from the external environment can be sent to the refrigerating chamber for refrigerating.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a fluid level gauge provided in a first embodiment of the present invention;
FIG. 2 (a) is a top view of the float in the level gauge of FIG. 1;
FIG. 2 (b) is a cross-sectional view of the float of FIG. 2 (a);
FIG. 3 (a) is a top view of the cover of the level gauge of FIG. 1;
FIG. 3 (b) is a cross-sectional view of the cover of FIG. 3 (a) taken along the direction A-A;
FIG. 4 is a schematic dimensional view of the gauge of FIG. 1;
fig. 5 is a schematic water path diagram of a sampling device according to a second embodiment of the present invention.
The main reference numerals in the drawings of the present specification are explained as follows:
01-a first direction;
1-a liquid level gauge; 11-a first level gauge; 12-a second level gauge; 101-a housing; 1011-lumen; 1012-a first port; 1013-a second port; 1014-reed switch; 1015-a shell; 1016-cover; 10161-sink; 1017-a deflector; 102-float; 1021-magnetic member; 103-sealing rings;
2-a sampling barrel; 3-sampling pump; 4-a sample feeding pump; 5-a sample conveying pipeline; 6-a water quality analyzer; 7-a first valve; 8-a drainage pipeline; 9-a second valve; 10-a third valve; 13-fourth valve; 14-a refrigerating chamber.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
The technical scheme of the invention provides a liquid level meter and sampling equipment, and the liquid level meter and the sampling equipment are respectively described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present invention. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiment of the invention, "parallel" refers to a state in which an angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is-10 degrees to 10 degrees; "perpendicular" refers to a state where the angle formed by a straight line to a straight line, a straight line to a plane, or a plane to a plane is 80 DEG to 100 deg; the equal distance means a state where the tolerance range is-10%.
Example 1
In some embodiments of the invention, as shown in fig. 1, a level gauge 1 comprises: a housing 101 having an inner cavity 1011 and a first port 1012 and a second port 1013 communicating with the inner cavity 1011, wherein the housing 101 has a first direction 01, and a reed switch 1014 is provided at one end in the first direction 01, the first port 1012 is disposed beside the reed switch 1014, and the second port 1013 is disposed at a side far from the reed switch 1014 in the first direction 01; and a float 102 accommodated in the inner cavity 1011 and provided with a magnetic member 1021; wherein the inner cavity 1011 is configured to hold a liquid, the liquid level of the liquid changes along the first direction 01, the float 102 floats on the liquid level and moves along the first direction 01 along with the liquid level change of the liquid level, the float 102 approaches the reed switch 1014 and turns on the reed switch 1014, or turns off the reed switch 1014 away from the reed switch 1014, so that the float 102 is driven to approach or depart from the reed switch 1014 by the lifting of the liquid level, so as to control the turn-on or turn-off of the reed switch 1014; the reed switch 1014 is used to feed back signals to a control module (not shown). The liquid level meter 1 provided by the invention has simple structure, high-efficiency and reliable performance, can be stably used in various hydrologic environments for a long time, and can obviously reduce the frequency of cleaning and maintenance; specifically, the water sample enters the inner cavity 1011 of the liquid level meter 1 from the second port 1013 of the liquid level meter 1, when the capacity of the water sample in the inner cavity 1011 of the liquid level meter 1 increases gradually, the liquid level of the water sample in the inner cavity 1011 also increases gradually, the float 102 accommodated in the inner cavity 1011 floats on the liquid level of the water sample and approaches the reed switch 1014 positioned at a higher position gradually, the reed switch 1014 is conducted under the magnetic force of the magnetic element 1021 arranged on the float 102, and then a signal is sent to the control module, so as to inform the control module that the capacity of the water sample in the liquid level meter 1 has reached a certain threshold value at this time, and the control module regulates related equipment or mechanism according to the information. Moreover, the magnetic float design can effectively control the magnetic reed switch 1014 in the inner cavity 1011 of the liquid level meter 1 mixed with sundries, thereby solving the problems that the liquid level meter 1 in the existing automatic water quality sampling equipment is easy to lose efficacy due to blockage caused by long-term use and needs frequent cleaning and maintenance. It will be appreciated that the term "debris" as used herein refers to fine sand or other particulate solid matter that may be generally mixed in a body of water, and that the level gauge may have solid matter such as scale remaining on the walls of the cavity 1011 after prolonged operation. The magnetic floater moves up and down along with the change of the liquid level, and the gap between the magnetic floater and the wall surface of the inner cavity 1011 can be designed to be larger, so that the floater 102 is not easy to be blocked by impurities such as scale, sediment and the like, and therefore, the liquid level meter of the invention can not fail when being applied to sampling equipment which operates for a long time.
It should be noted that "the first direction 01" in the present specification refers to the gravity direction, that is, the first direction 01 is perpendicular to the horizontal plane, and the liquid surface of the water sample is the same as the horizontal plane, and the level gauge 1 is placed in an upright manner, so that the liquid surface of the water sample moves from bottom to top along the first direction 01, or moves from top to bottom, that is, the main moving direction of the float 102 in the cavity 1011 is the same as or corresponding to the gravity direction.
In the present specification, "floating" refers to a case where an object immersed in a liquid or gas is vertically supported by the liquid or the object, and is not merely "the object is completely exposed to the liquid surface except for the bottom thereof".
It is understood that the type and specification of the reed switch 1014 can be selected and adjusted according to the actual application.
In some embodiments of the present invention, the number of magnetic pieces 1021 is one, the one magnetic piece 1021 may be disposed on one end surface of the float 102, and it should be noted that "end surface" herein refers to a surface near the reed switch 1014 perpendicular to the first direction 01 when the float 102 floats relatively stationary on the liquid surface.
In some embodiments of the present invention, the number of the magnetic pieces 1021 is two, and the two magnetic pieces 1021 are respectively disposed on two end surfaces of the float 102, and it should be noted that, herein, the "end surfaces" refer to the end surfaces respectively disposed on two sides in the first direction 01 when the float 102 floats relatively statically on the liquid surface, i.e., one of the end surfaces is closer to the reed switch 1014, and the other end surface is relatively farther from the reed switch 1014; so that there is no direction of placement requirement for the float 102 in the cavity 1011.
In some embodiments of the present invention, as shown in fig. 2, the shape of the float 102 is a cylinder, and two end surfaces of the float 102 in the form of the cylinder located in the first direction 01 are circular, and the two circular end surfaces are connected via a cylindrical surface.
In some embodiments of the invention, the float 102 is in the shape of a cube, and two end faces of the float 102 in the shape of a cube located in the first direction 01 are polygonal, the two polygonal end faces being connected via six rectangular faces. It will be appreciated that what configuration of float 102 is specifically employed depends on what shape of housing 101 is specifically employed, i.e., the shape and size of float 102 should be compatible with the shape and size of housing 101. In some embodiments of the present invention, the polygonal end faces may be rectangular or hexagonal.
In some embodiments of the present invention, the float 102 is in the shape of a sphere, and the magnetic elements 1021 may be uniformly distributed on the sphere of the float 102 to ensure that sufficient magnetic force is exerted on the reed switch 1014 regardless of the tumbling of the float 102.
In some embodiments of the present invention, the housing 101 may be made of metal or nonmetal, specifically, transparent plastic materials, such as transparent ABS and transparent PC, which have advantages of light weight and high strength, and facilitate the operator to observe the condition of the float 102, water sample and sludge in the inner cavity 1011 of the level gauge 1.
In some embodiments of the invention, as shown in FIG. 1, the housing 101 includes a shell 1015 and a shell cover 1016; the shell 1015 is provided with the first port 1012 and the second port 1013; the magnetic reed switch 1014 is arranged on the shell cover 1016; the housing cover 1016 is disposed on a side of the first direction 01 away from the second port 1013, and is connected to the housing 1015 in a sealing manner, thereby enclosing the inner cavity 1011. It should be noted that the housing 1015 and the housing cover 1016 may be detachably connected, so that an operator may take out the float 102 accommodated in the cavity 1011 or clean up impurities mixed in the cavity 1011.
In some embodiments of the invention, the cap 1016 is threadably coupled to the body 1015; the shell 101 of the liquid level meter 1 provided by the invention comprises a shell 1015 and a shell cover 1016, wherein the shell 1015 and the shell cover 1016 are fixed by screw tightening fit, so that an operator can conveniently take out the floater 102 contained in the inner cavity 1011 or clean sundries mixed in the inner cavity 1011.
In some embodiments of the invention, as shown in FIG. 3 (a), the front view of the cover 1016 is polygonal in shape; it will be appreciated that the front view of the housing cover 1016 can be adjusted to accommodate the actual use requirements to facilitate the removal or assembly of the housing cover 1016 by an operator. In some embodiments of the present invention, as shown in fig. 3 (b), a recess 10161 is disposed on a side of the cover 1016 facing away from the housing 1015, and the recess 10161 accommodates the reed switch 1014. It is understood that the sink 10161 can be selected and adjusted according to the practical application, and in particular, the sink 10161 should have a good fit relationship with the shape and size of the reed switch 1014.
In some embodiments of the invention, as shown in FIG. 4, the float 102 is cylindrical and the cavity 1011 is shapedShape is adapted to the float 102; and the height of the float 102, i.e. the dimension of the float 102 in the first direction 01 is H 1 The method comprises the steps of carrying out a first treatment on the surface of the The diameter of the float 102, i.e. the dimension of the float 102 in the second direction 02 is D 1 Wherein the second direction 02 is perpendicular to the first direction 01; in the first direction 01, the distance between an end surface of the housing 1015, which is far from the second port 1013, and a side of the first port 1012, which is near to the second port 1013, is H 2 The method comprises the steps of carrying out a first treatment on the surface of the The inner diameter of the shell 1015, i.e. the dimension of the shell 1015 in the second direction 02 is D 2 . Wherein H is 1 、H 2 、D 1 、D 2 Has the following relationship:i.e. inner diameter D of shell 1015 2 Smaller than the diameter D of the float 102 1 Square of (H) and height of the float 102 1 To ensure that the float 102 in cylindrical form does not roll in the cavity 1011, to ensure that the magnetic member 1021 is able to exert a sufficiently large magnetic influence on the reed switch 1014 when the float approaches the reed switch 1014, it is recommended that D 1 ＝(0.7～0.8)D 2 To ensure that the gauge 1 has a sufficiently accurate monitoring effect on the level change in the cavity 1011.
In some embodiments of the present invention, as shown in fig. 1, a funnel-shaped diversion portion 1017 is disposed on a side of the housing 1015 away from the reed switch 1014, and the housing 1015 gradually transitions into the second port 1013 through the diversion portion 1017. Obviously, by the above-described flow guiding slope structure of the flow guiding portion 1017, the efficiency of evacuating the liquid in the inner cavity 1011 through the second port 1013 can be improved.
In some embodiments of the present invention, as shown in fig. 1, a sealing ring 103 is further disposed between the housing cover 1016 and the housing 1015; it is understood that the specific specification, size and material of the sealing ring 103 can be selected and adjusted according to the actual application scenario.
Example 2
In some embodiments of the present invention, as shown in fig. 5, a sampling apparatus for providing a water sample to a water quality analyzer 6, the sampling apparatus comprising: the liquid level gauge 1 as described in embodiment 1, the liquid level gauge 1 comprising a first liquid level gauge 11; a sampling barrel 2; a sampling pump 3 connected in series between the first port 1012 of the first level gauge 11 and the sampling barrel 2; a sample feeding pump 4 connected in series with the sampling barrel 2; a sample feeding pipe 5 connected in series with the sampling barrel 2 via the sample feeding pump 4 and used for being connected in series with the water quality analyzer 6; a control module (not shown) electrically connected with the reed switch 1014, the sampling pump 3 and the sample feeding pump 4 in the first liquid level meter 11; wherein the sampling pump 3 pumps the water sample into the sampling barrel 2 from outside the sampling device through the first liquid level meter 11, the sample feeding pump 4 pumps the water sample from the sampling barrel 2 to the sample feeding pipe 5, and the water quality analyzer 6 extracts the water sample from the sample feeding pipe 5. The sampling equipment provided by the invention can be stably used for a long time in various hydrologic environments, and the frequency of daily cleaning and maintenance can be greatly reduced; specifically, the sampling pump 3 pumps a water sample from a water sample collection point through the first liquid level meter 11, pumps the water sample into the sampling barrel 2 for temporary storage, then the sample feeding pump 4 pumps the water sample from the sampling barrel 2, pumps the water sample to the water quality analyzer 6 through the sample feeding pipe 5, and performs water quality analysis operation on the water sample by the water quality analyzer 6; the first liquid level meter 11 can obtain a timing reference of the sampling pump 3 according to the position change of the floater in the inner cavity 1011 thereof, at this time, the sampling pump 3 starts to operate for a certain period of time, the total amount of water samples pumped by the sampling pump 3 in the specific time can be determined by presetting the flow rate and the operation period of the sampling pump 3, at this time, the sampling pump 3 starts to blow back, so as to discharge all the water samples in the inner cavity 1011 of the first liquid level meter 11 through the second port 1013 thereof, no water sample residue in the sample feeding pipeline is ensured, at this time, the floater 102 in the inner cavity 1011 of the first liquid level meter 11 is far away from the magnetic reed switch 1014 along with the falling of the water level, the magnetic reed switch 1014 is disconnected due to the influence of the magnetic part 1021 arranged on the floater 102, and the next time the water sample is pumped in the inner cavity 1011 of the first liquid level meter 11 and the water level rises to a certain degree, so as to provide a timing reference for the control module again, and the control module is convenient for controlling each component in the sampling device.
As shown in fig. 5, in some embodiments of the invention, the sampling device further comprises a first valve 7 and a drain line 8; the sampling barrel 2, the first valve 7 and the drainage pipeline 8 are sequentially connected in series; the first valve 7 is electrically connected with the control module.
As shown in fig. 5, in some embodiments of the invention, the gauge 1 further comprises a second gauge 12; a second port 1013 of the second liquid level meter 12 is connected in series with the pipe feeding line 5, and a first port 1012 of the second liquid level meter 12 is connected in series with the water discharging line 8; the control module is electrically connected to the reed switch 1014 in the second gauge 12. According to the sampling device provided by the invention, as the inner cavity 1011 of the second liquid level meter 12 can accommodate a part of water sample, when the sample feeding pump 4 works, a part of the water sample stored in the sampling barrel 2 is fed into the water quality analyzer 6, and the other part of the water sample is fed into the second liquid level meter 12, so that the floater 102 in the second liquid level meter 12 is close to the magnetic reed switch 1014 along with the rising of the water level, the magnetic reed switch 1014 is conducted, a signal is further fed back to the control module, and the control module further turns off the sample feeding pump 4, at the moment, because the peristaltic pump or other type of pump body is arranged in the water quality analyzer 6, the water quality analyzer 6 can extract the water sample from the sample feeding pipe 5, the water quality analyzer 6 can extract the water sample from the second liquid level meter 12 and the sample feeding pipe 5 after the sample feeding pump 4 is turned off, and after the water level in the inner cavity 1011 of the second liquid level meter 12 is lowered, the floater 102 is also lowered and far away from the magnetic reed switch 1014, the sample feeding pump 4 is started again after a preset period of time, and the water sample is continuously fed into the sample feeding pipe 5, and thus the cycle is shortened, and the working time of the sampling device can be prolonged.
As shown in fig. 5, in some embodiments of the invention, the sampling device further comprises a second valve 9 and a third valve 10; the sampling barrels 2 comprise a plurality of sampling barrels 2, each sampling barrel 2 is connected with the sampling pump 3 in series through the second valve 9, and each sampling barrel is connected with the sample feeding pump 4 in series through the third valve 10; the first valves 7 comprise a plurality of sampling barrels 2, and each sampling barrel 2 is connected in series with the drainage pipeline 8 through a corresponding first valve 7; the second valve 9 and the third valve 10 are electrically connected with the control module. It should be noted that the number of the first valves 7 is adapted to the number of the sampling barrels 2, and specifically, the number of the first valves 7 may be the same as the number of the sampling barrels 2. The sampling equipment provided by the invention is provided with a plurality of sampling barrels 2 so as to meet various use requirements; specifically, which sample in the sampling tank 2 is to be sent to the water quality analyzer 6 for water quality analysis can be achieved by setting a specific program to the control module. It can be understood that the specific size, shape and dimension of the sampling barrel 2 can be selected and adjusted according to the actual application scenario.
As shown in fig. 5, in some embodiments of the present invention, the sampling device further includes a fourth valve 13 and a refrigerating chamber 14; the fourth valve 13 is connected in series between the water supply pipe 5 and the refrigerating chamber 14, and can send the water sample collected from the water source sampling point to the refrigerating chamber 14 for cooling and preservation; the fourth valve 13 is electrically connected with the control module.
As shown in fig. 5, in some embodiments of the present invention, at least one of the sampling pump 3 and the sample feeding pump 4 is a peristaltic pump; the first valve 7 is a straight-through electric ball valve; at least one of the second valve 9, the third valve 10 and the fourth valve 13 is a three-way electric ball valve. It can be understood that the peristaltic pump, the direct-connection electric ball valve and the three-way electric ball valve which are in specific types and specifications can be selected and adjusted according to practical application scenes.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. Furthermore, the foregoing description of the principles and embodiments of the invention has been provided for the purpose of illustrating the principles and embodiments of the invention and for the purpose of providing a further understanding of the principles and embodiments of the invention, and is not to be construed as limiting the invention.
Claims (9)
1. A sampling device for providing a water sample to a water quality analyser (6), the sampling device comprising:
level gauge (1), the level gauge (1) comprising:
a housing (101), wherein the housing (101) is provided with an inner cavity (1011), a first port (1012) and a second port (1013) which are communicated with the inner cavity (1011), the housing (101) is provided with a first direction (01), one end in the first direction (01) is provided with a magnetic reed switch (1014), the first port (1012) is arranged at the side of the magnetic reed switch (1014), and the second port (1013) is arranged at the side of the first direction (01) away from the magnetic reed switch (1014);
a float (102), wherein the float (102) is accommodated in the inner cavity (1011) and is provided with a magnetic element (1021);
the two liquid level meters (1) are respectively a first liquid level meter (11) and a second liquid level meter (12), and
a sampling barrel (2); and
the sampling pump (3) is connected in series between a first port (1012) of the first liquid level meter (11) and the sampling barrel (2); and
a sample feeding pump (4) connected in series with the sampling barrel (2); and
a sample delivery pipe (5) connected in series with the sampling barrel (2) through the sample delivery pump (4) and used for being connected in series with the water quality analyzer (6); a second port (1013) of the second liquid level meter (12) is connected in series with the pipe feeding pipeline (5); and
the control module is electrically connected with the magnetic reed switch (1014) in the first liquid level meter (11), the magnetic reed switch (1014) in the second liquid level meter (12), the sampling pump (3) and the sample feeding pump (4);
the sampling pump (3) pumps a water sample into the sampling barrel (2) from outside the sampling equipment through the first liquid level meter (11), the sample feeding pump (4) pumps the water sample into the sample feeding pipe (5) and the second liquid level meter (12) from the sampling barrel (2), and the water quality analyzer (6) extracts the water sample from the sample feeding pipe (5).
2. The sampling device according to claim 1, wherein the housing (101) comprises a housing body (1015) and a housing cover (1016);
the shell (1015) is provided with the first port (1012) and the second port (1013);
the magnetic reed switch (1014) is arranged on the shell cover (1016);
the shell cover (1016) is arranged on one side, far away from the second port (1013), of the first direction (01), is connected with the shell body (1015) in a sealing manner, and further encloses the inner cavity (1011).
3. The sampling device according to claim 2, characterized in that a side of the housing cover (1016) facing away from the housing body (1015) is provided with a countersink (10161), the countersink (10161) accommodating the reed switch (1014).
4. The sampling device according to claim 2, characterized in that a funnel-shaped flow guiding portion (1017) is provided on the side of the housing (1015) remote from the reed switch (1014), the housing (1015) gradually transitioning into the second port (1013) through the flow guiding portion (1017).
5. The sampling device according to any one of claims 2 to 4, wherein a sealing ring (103) is further provided between the housing cover (1016) and the housing body (1015).
6. The sampling device according to claim 1, characterized in that the sampling device further comprises a first valve (7) and a drain line (8);
the sampling barrel (2), the first valve (7) and the drainage pipeline (8) are sequentially connected in series;
the first valve (7) is electrically connected with the control module.
7. The sampling device of claim 6, wherein the sampling device comprises a plurality of sampling electrodes,
a first port (1012) of the second level gauge (12) is connected in series with the drain line (8).
8. The sampling device according to claim 7, characterized in that it further comprises a second valve (9) and a third valve (10);
the sampling barrels (2) comprise a plurality of sampling barrels, each sampling barrel (2) is connected in series with the sampling pump (3) through the second valve (9), and each sampling barrel is connected in series with the sample feeding pump (4) through the third valve (10);
the first valves (7) comprise a plurality of sampling barrels (2), and each sampling barrel is connected in series with the drainage pipeline (8) through a corresponding first valve (7);
the second valve (9) and the third valve (10) are electrically connected with the control module.
9. The sampling device according to claim 8, characterized in that it further comprises a fourth valve (13) and a refrigerating chamber (14);
the fourth valve (13) is connected in series between the pipe feeding pipeline (5) and the refrigerating chamber (14);
the fourth valve (13) is electrically connected with the control module.
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| CN116105835A (en) | 2023-05-12 |
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