CN117647477A - Online dust particle counter - Google Patents
Online dust particle counter Download PDFInfo
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- CN117647477A CN117647477A CN202311613813.3A CN202311613813A CN117647477A CN 117647477 A CN117647477 A CN 117647477A CN 202311613813 A CN202311613813 A CN 202311613813A CN 117647477 A CN117647477 A CN 117647477A
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- 239000002245 particle Substances 0.000 title claims abstract description 76
- 239000000428 dust Substances 0.000 title claims abstract description 66
- 238000007664 blowing Methods 0.000 claims abstract description 141
- 238000002955 isolation Methods 0.000 claims abstract description 79
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000005070 sampling Methods 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 8
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses an online dust particle counter, which relates to the technical field of dust particle counting and comprises a shell, a detection assembly, a sampling mechanism, a measurement cavity, an air inlet pipe and an air blowing isolation assembly, wherein the detection assembly, the measurement cavity, the air inlet pipe and the air blowing isolation assembly are arranged in the shell, one end of the sampling mechanism is arranged on one side outside the shell and connected with one end of the air inlet pipe in a penetrating manner, one end of the measurement cavity is connected with the other end of the air inlet pipe through the air blowing isolation assembly, at least one air inlet nozzle is arranged on the periphery of the air blowing isolation assembly, one end of the air blowing isolation assembly is provided with an annular air blowing nozzle, the annular air blowing nozzle is communicated with the air inlet nozzle, the annular air blowing nozzle can be tightly attached to the inner wall of the measurement cavity for blowing, and the detection assembly is used for responding to detection instructions to detect the quantity of particles passing through the measurement cavity in real time. The technical problems that dust particles are stuck on the inner wall of a measuring cavity in the measuring process of the existing online dust particle counter, measuring errors can be generated, and the measuring accuracy of the online dust particle counter is reduced are solved.
Description
Technical Field
The invention relates to the technical field of dust particle counting, in particular to an online dust particle counter.
Background
The dust particle counter is an instrument for measuring the number of dust particles and the particle size distribution per unit volume in a clean environment. The basic working principle of the dust particle counter is as follows: the optical system of the instrument irradiates a light source into the measuring cavity through a lens and a slit to form a light sensitive area with a volume of about several cubic millimeters, and when each particle in the air rapidly passes through the light sensitive area in the measuring cavity, the incident light is scattered once to form an optical pulse signal. The optical signal is collected by the lens for collecting light, projected onto the photodetector, converted into electric pulse signal in proportion, amplified and screened by the electronic circuit of the instrument, and the signal is displayed by the counting system.
The on-line dust particle counter is a counter for continuously monitoring the environmental cleanliness for a long time and can feed back monitoring data in real time. However, when air is sampled every time, some dust particles are stuck on the inner side wall of the measuring cavity, and the dust particles stuck on the measuring cavity can influence the measuring precision on one hand, and can pollute or even corrode the measuring cavity on the other hand, so that the instrument is permanently damaged.
At present, the instrument is usually cleaned and calibrated before measurement, and the instrument is regularly subjected to maintenance and calibration, but the method is time-consuming and labor-consuming to operate manually, the cleaning maintenance frequency is high, the parts are more damaged in a frequent disassembly and assembly process, dust particles are stuck to the inner wall of a measurement cavity in the measurement process of the online dust particle counter, measurement errors still occur, and the measurement accuracy of the online dust particle counter is reduced.
Disclosure of Invention
The invention provides an online dust particle counter, which solves the technical problems that the conventional online dust particle counter needs to regularly disassemble a measuring cavity for cleaning and calibration, wastes time and labor, and in the measuring process, dust particles are stuck on the inner wall of the measuring cavity to generate measuring errors, so that the measuring accuracy of the online dust particle counter is reduced.
The invention provides an online dust particle counter which comprises a shell, a detection assembly, a sampling mechanism, a measurement cavity, an air inlet pipe and an air blowing isolation assembly, wherein the detection assembly is arranged on the shell;
the detection assembly, the measurement cavity, the air inlet pipe and the air blowing isolation assembly are arranged in the shell;
one end of the sampling mechanism is arranged on one side outside the shell, penetrates through the shell and is connected with one end of the air inlet pipe;
one end of the measuring cavity is connected with the other end of the air inlet pipe through the air blowing isolation assembly, and at least one air inlet nozzle is arranged on the periphery of the air blowing isolation assembly;
one end of the air blowing isolation assembly is provided with an annular air blowing nozzle which is communicated with the air inlet nozzle, and the annular air blowing nozzle can be tightly attached to the inner wall of the measuring cavity for blowing air;
the detection assembly is used for responding to detection instructions and detecting the number of particles passing through the measurement cavity in real time.
Optionally, one end of the air blowing isolation assembly, which is far away from the annular air blowing nozzle, is fixedly connected with the other end of the air inlet pipe;
the sampling air introduced by the sampling mechanism sequentially passes through the air inlet pipe and the blowing isolation assembly;
one end of the blowing isolation assembly, provided with the annular blowing nozzle, can extend into the measuring cavity.
Optionally, the air blowing isolation assembly is of an annular structure;
the air blowing isolation assembly is internally provided with an annular air accommodating cavity, and the annular air blowing nozzle, the air inlet nozzle and the annular air accommodating cavity are communicated.
Optionally, the circumferential side of the annular blowing nozzle is in threaded connection with the inner wall of the measuring cavity.
Optionally, the measuring cavity is a straight cylinder;
the annular blowing nozzle is parallel to the inner wall of the measuring cavity.
Optionally, a first connecting groove is formed in the inner wall of one end part of the measuring cavity, and threads are formed in the inner wall of the first connecting groove;
the first connection is in threaded connection with the circumferential side of the annular blowing nozzle and the inner wall of the first connection groove;
the depth of the first connecting groove is the same as the thickness of the outer side wall of the annular blowing nozzle;
the length of the annular blowing nozzle is greater than or equal to the length of the first connecting groove.
Optionally, a connector is arranged at the other end of the air inlet pipe, and the connector is of a closing-in structure;
the circumference of the connector is fixedly connected with the inner wall of the blowing isolation assembly.
Optionally, the inner wall of one end part of the blowing isolation assembly far away from the annular blowing nozzle is provided with a second connecting groove;
the inner wall of the second connecting groove is provided with threads, and the periphery of the connector is in threaded connection with the second connecting groove;
the depth of the second connecting groove is the same as the thickness of the connector.
Optionally, the length of the connector is greater than or equal to the length of the second connecting groove.
Optionally, the detection assembly includes a light source, a first lens, a second lens, and a light detector;
the light source, the first lens, the second lens and the light detector are directed towards a light sensitive region of the measurement cavity;
the first connecting line between the light source and the first lens is perpendicular to the second connecting line between the second lens and the light detector.
From the above technical scheme, the invention has the following advantages:
the online dust particle counter comprises a shell, a detection assembly, a sampling mechanism, a measurement cavity, an air inlet pipe and an air blowing isolation assembly, wherein the detection assembly, the measurement cavity, the air inlet pipe and the air blowing isolation assembly are arranged inside the shell, one end of the sampling mechanism is arranged on one side outside the shell and connected with one end of the air inlet pipe in a penetrating manner, one end of the measurement cavity is connected with the other end of the air inlet pipe through the air blowing isolation assembly, at least one air inlet nozzle is arranged on the periphery of the air blowing isolation assembly, one end of the air blowing isolation assembly is provided with an annular air blowing nozzle, the annular air blowing nozzle is communicated with the air inlet nozzle, the annular air blowing nozzle can be tightly attached to the inner wall of the measurement cavity to blow air, and the detection assembly is used for responding to detection instructions and detecting the quantity of particles passing through the measurement cavity in real time. The online dust particle counter solves the technical problems that the conventional online dust particle counter needs to regularly disassemble the measuring cavity for cleaning and calibration, time and labor are wasted, dust particles are stuck to the inner wall of the measuring cavity in the measuring process, measuring errors can be generated, and the measuring accuracy of the online dust particle counter is reduced. According to the invention, the air blowing isolation assembly is arranged between the measuring cavity and the air inlet pipe, the annular air blowing nozzle is arranged at one end of the air blowing isolation assembly, the annular air blowing nozzle can extend into the measuring cavity and can be tightly attached to the inner wall of the measuring cavity for blowing air, and after the sampling air is blown into the measuring cavity from the air inlet pipe, the air blowing isolation assembly can blow pure air along the inner wall of the measuring cavity, and the pure air isolates the sampling air from the measuring cavity, so that dust particles in the sampling air are prevented from contacting and sticking on the inner wall of the measuring cavity, and the running reliability of an online dust particle counter is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of an online dust particle counter according to an embodiment of the invention;
FIG. 2 is a schematic diagram showing an internal structure of an online dust particle counter according to an embodiment of the invention;
FIG. 3 is a schematic diagram of an assembly structure of a measuring chamber according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an online dust particle counter according to an embodiment of the invention;
FIG. 5 is a schematic diagram showing an internal structure of an online dust particle counter according to an embodiment of the invention;
FIG. 6 is an enlarged partial schematic view of an embodiment of the present invention at an in-line dust particle counter A;
FIG. 7 is a schematic view of the structure of a measuring chamber, a blow isolation assembly and an air inlet pipe according to an embodiment of the present invention;
FIG. 8 is a schematic view of a blow isolation assembly according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a blow isolation assembly according to an embodiment of the present invention;
FIG. 10 is a schematic view of a measuring chamber according to an embodiment of the present invention;
FIG. 11 is a schematic diagram showing the flow of gas during operation of an in-line dust particle counter according to an embodiment of the invention;
wherein the reference numerals have the following meanings:
1. a measurement cavity; 101. a first connection groove; 2. a blow isolation assembly; 201. an air inlet nozzle, 202 and an annular air accommodating cavity; 203. an annular air blowing nozzle; 204. a second connecting groove; 3. an air inlet pipe; 301. and (5) a connector.
Detailed Description
The embodiment of the invention provides an online dust particle counter, which is used for solving the technical problems that the conventional online dust particle counter needs to regularly disassemble a measuring cavity for cleaning and calibration, time and labor are wasted, dust particles are stuck on the inner wall of the measuring cavity in the measuring process, measuring errors can be generated, and the measuring accuracy of the online dust particle counter is reduced.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. 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 be within the scope of the invention.
Referring to fig. 1-11, the present invention provides an online dust particle counter, which includes a housing, a detection assembly, a sampling mechanism, a measurement cavity 1, an air inlet pipe 3 and an air blowing isolation assembly 2;
the detection assembly, the measurement cavity 1, the air inlet pipe 3 and the air blowing isolation assembly 2 are arranged in the shell;
one end of the sampling mechanism is arranged on one side outside the shell and penetrates through the shell to be connected with one end of the air inlet pipe 3;
one end of the measuring cavity 1 is connected with the other end of the air inlet pipe 3 through an air blowing isolation assembly 2, and at least one air inlet nozzle 201 is arranged on the periphery of the air blowing isolation assembly 2;
one end of the air blowing isolation assembly 2 is provided with an annular air blowing nozzle 203, the annular air blowing nozzle 203 is communicated with the air inlet nozzle 201, and the annular air blowing nozzle 203 can be tightly attached to the inner wall of the measuring cavity 1 for blowing air;
and the detection component is used for responding to the detection instruction and detecting the quantity of particles passing through the measuring cavity 1 in real time.
In an embodiment of the invention, the online dust particle counter comprises a shell, a detection assembly, a sampling mechanism, a measurement cavity 1, an air inlet pipe 3 and an air blowing isolation assembly 2. The detection assembly, the measurement cavity 1, the air inlet pipe 3 and the air blowing isolation assembly 2 are arranged inside the shell, one end of the sampling mechanism is arranged on one side outside the shell, and one end of the sampling mechanism penetrates through the shell and is connected with one end of the air inlet pipe 3. One end of the measuring cavity 1 is connected with the other end of the air inlet pipe 3 through an air blowing isolation assembly 2, and at least one air inlet nozzle 201 is arranged on the periphery of the air blowing isolation assembly 2. One end of the air blowing isolation assembly 2 is provided with an annular air blowing nozzle 203, the annular air blowing nozzle 203 is communicated with the air inlet nozzle 201, and the annular air blowing nozzle 203 can be tightly attached to the inner wall of the measuring cavity 1 to blow air, so that sampling air blown by the air inlet pipe 3 is prevented from contacting the measuring cavity 1. And the detection component is used for responding to the detection instruction and detecting the quantity of particles passing through the measuring cavity 1 in real time.
In another embodiment, referring to FIG. 8, the air inlet nozzle 201 may be provided in multiple, such as two. The two air inlet nozzles 201 are oppositely arranged on the periphery of the annular air accommodating cavity 202, so that air inlet is more uniform, and the phenomenon of overlarge air pressure difference along the periphery of the annular air blowing nozzle 203 is avoided.
Referring to fig. 1-3, an end of the air blowing isolation assembly 2 away from the annular air blowing nozzle 203 is fixedly connected with the other end of the air inlet pipe 3. The sampling air introduced by the sampling mechanism sequentially passes through the air inlet pipe 3 and the blowing isolation assembly 2. The end of the blowing isolation assembly 2 provided with the annular blowing nozzle 203 can extend into the measuring cavity 1.
In the embodiment of the invention, one end of the air blowing isolation assembly 2 far away from the annular air blowing nozzle 203 is fixedly connected with the other end of the air inlet pipe 3, and sampling air introduced by the sampling mechanism sequentially passes through the air inlet pipe 3 and the air blowing isolation assembly 2. The end of the blowing isolation assembly 2 provided with the annular blowing nozzle 203 can extend into the measuring cavity 1.
In another embodiment, the online dust particle counter comprises a measuring cavity 1 and an air inlet pipe 3, wherein the air inlet pipe 3 is connected with an air pump and one end of the measuring cavity 1, and is used for conveying sampling gas in the environment to the measuring cavity 1.
Referring to fig. 3-7, the air-blowing isolation assembly 2 has a ring-shaped structure. An annular air accommodating cavity 202 is arranged in the air blowing isolation assembly 2, and the annular air blowing nozzle 203, the air inlet nozzle 201 and the annular air accommodating cavity 202 are communicated.
In the embodiment of the invention, the improved core of the device is that a blowing isolation assembly 2 is arranged between the measuring cavity 1 and the air inlet pipe 3. The air blowing isolation assembly 2 adopts an annular structure, a hollow annular air accommodating cavity 202 is formed in the air blowing isolation assembly, and the annular air blowing nozzle 203 is communicated with the air inlet nozzle 201 and the annular air accommodating cavity 202. The air inlet nozzle 201 is connected with a pure air source through an air pipe, and pure air enters the annular air accommodating cavity 202 from the air inlet nozzle 201 and is blown out from the annular blowing nozzle 203.
Referring to fig. 10, the circumferential side of the annular air nozzle 203 is screwed to the inner wall of the measuring chamber 1.
In the embodiment of the present invention, the circumferential side of the annular blowing nozzle 203 is screwed with the inner wall of the measurement chamber 1.
Referring to fig. 10, the measuring chamber 1 is a straight cylinder. The annular blowing nozzle 203 is parallel to the inner wall of the measuring cavity 1.
In the embodiment of the invention, the measuring cavity 1 adopts a transparent straight cylinder shape, and the annular blowing nozzle 203 is arranged in parallel with the inner wall of the measuring cavity 1. So that the pure air blown out by the annular blowing nozzle 203 can cling to the inner wall of the measuring cavity 1 to form an isolation layer.
Referring to fig. 10, a first connecting groove 101 is formed in an inner wall of one end of the measuring cavity 1, and threads are formed on an inner wall of the first connecting groove 101. The first connection and the circumferential side of the annular blowing nozzle 203 are in threaded connection with the inner wall of the first connection groove 101. The depth of the first connecting groove 101 is the same as the thickness of the outer sidewall of the annular blowing nozzle 203. The length of the annular blowing nozzle 203 is greater than or equal to the length of the first connecting groove 101.
In the embodiment of the invention, an annular first connecting groove 101 is formed in the inner wall of one end part of the measuring cavity 1, an inner thread is formed in the inner wall of the first connecting groove 101, an outer thread is formed on the periphery of the annular air blowing nozzle 203, and the annular air blowing nozzle 203 can extend into the measuring cavity 1 and be in threaded connection with the inner wall of the first connecting groove 101. The depth of the first connection groove 101 is the same as the thickness of the outer sidewall of the annular air nozzle 203, so that when the annular air nozzle 203 is connected with the first connection groove 101, the outer inner wall of the annular air nozzle 203 is flush with the inner wall of the measurement cavity 1. By the design, steps are prevented from being formed between the annular air blowing nozzle 203 and the inner wall of the measuring cavity 1, turbulence can be generated by the steps, and pure air can flow from the annular air blowing nozzle 203 into the measuring cavity 1 smoothly and flow along the inner wall of the measuring cavity 1 smoothly. In addition, the length of the annular air nozzle 203 should not be smaller than the length of the first connecting groove 101, i.e. the end surface of the annular air nozzle 203 can abut against the inner end surface of the first connecting groove 101, so as to avoid generating gaps or steps.
Referring to fig. 9, the other end of the air inlet pipe 3 is provided with a connector 301, and the connector 301 is of a closing structure. The circumference of the connector 301 is fixedly connected with the inner wall of the blowing isolation assembly 2.
In the embodiment of the invention, one end of the air inlet pipe 3 is provided with a connector 301, the connector 301 adopts a convergent structure, and the air inlet pipe 3 and the connector 301 are in smooth transition. The circumference of the connector 301 is fixedly connected with the inner wall of the blowing isolation assembly 2.
Referring to fig. 9, the blowing isolation assembly 2 is provided with a second connecting groove 204 on an inner wall of an end portion far from the annular blowing nozzle 203. The second connecting groove 204 has threads on the inner wall, and the connector 301 is screwed to the second connecting groove 204 on the peripheral side. The depth of the second connection groove 204 is the same as the thickness of the connection head 301.
In the embodiment of the present invention, the inner wall of one end portion of the blowing isolation assembly 2 far away from the annular blowing nozzle 203 is provided with an annular second connecting groove 204, the inner wall of the second connecting groove 204 is provided with internal threads, the periphery of the connector 301 is provided with external threads, and the periphery of the connector 301 is in threaded connection with the inner wall of the second connecting groove 204. The depth of the second connecting groove 204 is the same as the thickness of the connector 301, so that the inner wall of the connector 301 is flush with the inner wall of the air blowing isolation assembly 2.
Referring to fig. 9, the length of the connection head 301 is greater than or equal to the length of the second connection groove 204.
In the embodiment of the present invention, the length of the connector 301 is not less than the length of the second connecting groove 204. The connection structure between the connector 301 and the air blowing isolation assembly 2 has the same function as the connection structure between the annular air blowing nozzle 203 and the measurement cavity 1, and will not be described herein.
In the assembly process, the measuring chamber 1 is first installed in the body of the online dust particle counter, the annular blowing nozzle 203 is then screwed into the first connecting groove 101 at one end of the measuring chamber 1, and finally the air inlet pipe 3 is screwed into the second connecting groove 204 in the blowing isolation assembly 2.
It should be noted that, referring to fig. 11, when the online dust particle counter is operated, a pure air source needs to be started in advance, and pure air enters the annular air accommodating cavity 202 from the air inlet nozzle 201, is blown into the measuring cavity 1 from the annular air blowing nozzle 2032, and flows smoothly along the inner wall of the measuring cavity 1. Then the sampling air pump is started, the adopted gas in the environment flows into the measuring cavity 1 from the air inlet pipe 3 through the blowing isolation assembly 2, and as the pure air is isolated between the adopted gas and the inner wall of the measuring cavity 1, dust particles in the sampled air can be prevented from contacting and sticking on the inner wall of the measuring cavity 1, and the measuring precision of the particle counter is ensured. Wherein the flow rate of the pure air blown into the measuring chamber 1 should be greater than the flow rate of the gas used to enter the measuring chamber 1. This is so designed because, when the flow rates of the pure air and of the gas used are the same, the two are equivalent to remaining relatively stationary in the measuring chamber 1, there being cases where mutual penetration occurs. When the flow velocity of the pure air is smaller than that of the adopted gas, the viscous condition of the pure gas to the sampled gas can occur, the flow stability of the sampled gas in the measuring cavity 1 is poor, and turbulence is easy to occur.
Compared with the original online dust particle counter, the design has the advantages that the quantity of dust particles existing in unit sampling gas cannot be changed by the introduced clean air, namely, the calculation logic of the counter cannot be changed, the change in the aspect of software programming is not needed, the design is practical, and the design is suitable for the transformation of the existing products or the products put into use.
Referring to fig. 2, the detection assembly includes a light source, a first lens, a second lens and a light detector;
the light source, the first lens, the second lens and the light detector are directed towards the light sensitive area of the measurement cavity 1;
the first connecting line between the light source and the first lens is perpendicular to the second connecting line between the second lens and the light detector.
In an embodiment of the invention, the detection assembly comprises a light source, a first lens, a second lens and a light detector, and the light source, the first lens, the second lens and the light detector are arranged in the shell. The light source, the first lens, the second lens and the light detector are directed towards the light sensitive area of the measurement cavity 1. The first connecting line between the light source and the first lens is perpendicular to the second connecting line between the second lens and the light detector, and the perpendicular intersection point is located in the light sensitive area. The photodetector is used to detect dust particles that flow through the photodetector.
In the embodiment of the invention, the online dust particle counter comprises a shell, a detection assembly, a sampling mechanism, a measurement cavity, an air inlet pipe and an air blowing isolation assembly, wherein the detection assembly, the measurement cavity, the air inlet pipe and the air blowing isolation assembly are arranged in the shell, one end of the sampling mechanism is arranged on one side outside the shell and penetrates through the shell to be connected with one end of the air inlet pipe, one end of the measurement cavity is connected with the other end of the air inlet pipe through the air blowing isolation assembly, at least one air inlet nozzle is arranged on the periphery of the air blowing isolation assembly, one end of the air blowing isolation assembly is provided with an annular air blowing nozzle, the annular air blowing nozzle is communicated with the air inlet nozzle, the annular air blowing nozzle can be tightly attached to the inner wall of the measurement cavity to blow air, and the detection assembly is used for responding to detection instructions and detecting the particle quantity in the measurement cavity in real time. The online dust particle counter solves the technical problems that the conventional online dust particle counter needs to regularly disassemble the measuring cavity for cleaning and calibration, time and labor are wasted, dust particles are stuck to the inner wall of the measuring cavity in the measuring process, measuring errors can be generated, and the measuring accuracy of the online dust particle counter is reduced. According to the invention, the air blowing isolation assembly is arranged between the measuring cavity and the air inlet pipe, the annular air blowing nozzle is arranged at one end of the air blowing isolation assembly, the annular air blowing nozzle can extend into the measuring cavity and can be tightly attached to the inner wall of the measuring cavity for blowing air, and after the sampling air is blown into the measuring cavity from the air inlet pipe, the air blowing isolation assembly can blow pure air along the inner wall of the measuring cavity, and the pure air isolates the sampling air from the measuring cavity, so that dust particles in the sampling air are prevented from contacting and sticking on the inner wall of the measuring cavity, and the running reliability of an online dust particle counter is improved.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An online dust particle counter is characterized by comprising a shell, a detection assembly, a sampling mechanism, a measurement cavity, an air inlet pipe and an air blowing isolation assembly;
the detection assembly, the measurement cavity, the air inlet pipe and the air blowing isolation assembly are arranged in the shell;
one end of the sampling mechanism is arranged on one side outside the shell, penetrates through the shell and is connected with one end of the air inlet pipe;
one end of the measuring cavity is connected with the other end of the air inlet pipe through the air blowing isolation assembly, and at least one air inlet nozzle is arranged on the periphery of the air blowing isolation assembly;
one end of the air blowing isolation assembly is provided with an annular air blowing nozzle which is communicated with the air inlet nozzle, and the annular air blowing nozzle can be tightly attached to the inner wall of the measuring cavity for blowing air;
the detection assembly is used for responding to detection instructions and detecting the number of particles passing through the measurement cavity in real time.
2. The online dust particle counter of claim 1, wherein an end of the blow isolation assembly remote from the annular blow nozzle is fixedly connected to the other end of the air inlet pipe;
the sampling air introduced by the sampling mechanism sequentially passes through the air inlet pipe and the blowing isolation assembly;
one end of the blowing isolation assembly, provided with the annular blowing nozzle, can extend into the measuring cavity.
3. The on-line dust particle counter of claim 1, wherein the blow isolation assembly is of annular configuration;
the air blowing isolation assembly is internally provided with an annular air accommodating cavity, and the annular air blowing nozzle, the air inlet nozzle and the annular air accommodating cavity are communicated.
4. An in-line dust particle counter according to claim 3, wherein the circumferential side of the annular blowing nozzle is screwed to the inner wall of the measuring chamber.
5. An on-line dust particle counter according to claim 3, wherein the measurement cavity is a straight cylinder;
the annular blowing nozzle is parallel to the inner wall of the measuring cavity.
6. The online dust particle counter of claim 1, wherein a first connecting groove is formed in an inner wall of one end of the measuring cavity, and threads are formed in the inner wall of the first connecting groove;
the first connection is in threaded connection with the circumferential side of the annular blowing nozzle and the inner wall of the first connection groove;
the depth of the first connecting groove is the same as the thickness of the outer side wall of the annular blowing nozzle;
the length of the annular blowing nozzle is greater than or equal to the length of the first connecting groove.
7. The online dust particle counter according to claim 1, wherein a connector is arranged at the other end of the air inlet pipe, and the connector is of a closing-in structure;
the circumference of the connector is fixedly connected with the inner wall of the blowing isolation assembly.
8. The on-line dust particle counter of claim 7, wherein said blow isolation assembly has a second attachment slot formed in an inner wall of an end portion thereof remote from said annular blow nozzle;
the inner wall of the second connecting groove is provided with threads, and the periphery of the connector is in threaded connection with the second connecting groove;
the depth of the second connecting groove is the same as the thickness of the connector.
9. The in-line dust particle counter of claim 8, wherein the length of the connector is greater than or equal to the length of the second connector slot.
10. The online dust particle counter of claim 1, wherein the detection assembly includes a light source, a first lens, a second lens, and a light detector;
the light source, the first lens, the second lens and the light detector are directed towards a light sensitive region of the measurement cavity;
the first connecting line between the light source and the first lens is perpendicular to the second connecting line between the second lens and the light detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311613813.3A CN117647477A (en) | 2023-11-29 | 2023-11-29 | Online dust particle counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311613813.3A CN117647477A (en) | 2023-11-29 | 2023-11-29 | Online dust particle counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117647477A true CN117647477A (en) | 2024-03-05 |
Family
ID=90044504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311613813.3A Pending CN117647477A (en) | 2023-11-29 | 2023-11-29 | Online dust particle counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117647477A (en) |
-
2023
- 2023-11-29 CN CN202311613813.3A patent/CN117647477A/en active Pending
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