CN113125316A - Shunt protection dry method window and dry method test system - Google Patents
Shunt protection dry method window and dry method test system Download PDFInfo
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- CN113125316A CN113125316A CN202110332404.0A CN202110332404A CN113125316A CN 113125316 A CN113125316 A CN 113125316A CN 202110332404 A CN202110332404 A CN 202110332404A CN 113125316 A CN113125316 A CN 113125316A
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- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title abstract description 33
- 239000005304 optical glass Substances 0.000 claims abstract description 42
- 239000000428 dust Substances 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000011064 split stream procedure Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 49
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000003570 air Substances 0.000 description 68
- 238000007789 sealing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means, e.g. by light scattering, diffraction, holography or imaging
Abstract
The invention discloses a shunt protection dry method window, comprising: the sample window body is internally provided with an airflow cavity for airflow to pass through; the two optical glass windows are oppositely arranged on the left side wall and the right side wall of the sample window body, and a test area is formed between the two optical glass windows; the sample spray pipe is vertically arranged in the airflow cavity in a penetrating way and is used for the circulation of a sample, and the tail end of the sample spray pipe is provided with a sample spray port which faces the test area; the extension direction of the shunt body is consistent with the axial direction of the sample spray pipe, the shunt body is wide in the middle and narrow in the two ends, and the shunt body is arranged at one end, close to the sample spray opening, of the sample spray pipe and is located in the airflow cavity. The invention also discloses a dry method test system. The dry method window has an ingenious structure, and the optical glass window is effectively protected from being polluted by sample dust particles by ingeniously utilizing the shape characteristic that the split fluid is wide in the middle and narrow at two ends by arranging the split fluid in front of the sample ejection port, so that the background noise in the testing process is reduced, and the accuracy of the sample particle size testing result is improved.
Description
Technical Field
The invention relates to the technical field of particle size analyzers, in particular to a shunt protection dry method window and a dry method test system.
Background
Most samples in the traditional micro powder industry can be tested by adopting a dry testing system, the dry testing system intelligently changes the input of dispersing energy aiming at various samples which are regular or irregular, fragile or agglomerated, have different particle densities and different distribution widths, the agglomerated samples can be fully dispersed without breaking particles, and the samples are uniformly and representatively conveyed to a testing area.
The dry test system of the laser particle size analyzer comprises a test host, a sample feeding device, a sample spray pipe, an optical glass window, a dust collecting device and the like, wherein the optical glass window is used as a test medium (containing a powder sample) to be separated from the environment. And after the sample is tested, the sample enters the dust collection device and finally enters a recovery bag through the dust collection port.
When the existing dry-method testing system is actually used, dust particles in a high-speed airflow mixed sample can directly contact and rub with the surface of an optical glass window, so that the optical glass window can be scratched or polluted, the scratch and pollution on the surface of the optical glass window not only greatly increase the background noise of the test, but also influence the accuracy of the sample granularity testing result.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the shunting protection dry method window provided by the invention has a smart structure, can effectively protect the optical glass window from being polluted by sample dust particles, reduces background noise in the testing process, and improves the accuracy of a sample particle size testing result.
The invention also provides a dry test system with the shunt protection dry window.
According to an embodiment of the first aspect of the present invention, a shunt protection dry window includes: the sample window body is internally provided with an airflow cavity for airflow to pass through; the two optical glass windows are oppositely arranged on the left side wall and the right side wall of the sample window body, and a test area is formed between the two optical glass windows; the sample spray pipe is vertically arranged in the airflow cavity in a penetrating mode and is used for sample circulation, and a sample spray port is arranged at the tail end and faces the test area; and the extension direction of the shunt body is consistent with the axial direction of the sample spray pipe, the shunt body is wide in the middle and narrow in the two ends, is arranged at one end of the sample spray pipe close to the sample spray port, and is positioned in the airflow cavity.
According to the embodiment of the first aspect of the present invention, the shunt protection dry window has at least the following beneficial effects:
the window of the dry method is characterized in that a shunting body is arranged in front of a sample ejection port, air current flows to the front of the sample ejection port along an air current cavity, the air current can flow through the shunting body firstly, because the extension direction of the shunting body is consistent with the axial direction of the sample ejection pipe, and the shunting body is in a shape with a wide middle part and narrow two ends, when the air current flows through the shunting body, the gap between the shunting body and the inner wall of the air current cavity can be gradually reduced, namely the cross-sectional area of a flowing carrier of the air current is gradually reduced, the flow rate of the air current can be gradually increased because the flow rate of the air current is constant, when the air current flows through the middle part of the shunting body, the width of the shunting body is widest at the moment, the gap between the shunting body and the inner wall of the air current cavity is the smallest, the flow rate of the air current reaches the largest, at the moment, the left and right widest end parts of the, then, the air current forms high-speed jet air current in the jet area and continues to flow towards the direction of the sample jet orifice, again, the advantage of the fact that the shunt body is in a shape with a wide middle part and narrow ends, connecting lines between the leftmost end of the shunt body and the tail end of the shunt body and between the rightmost end of the shunt body and the tail end of the shunt body are oblique lines, according to the principle of a fluid wall attachment effect, the jet air current can be adsorbed by the rear section surface of the shunt body, namely the jet air current can be attached to the rear section surface of the shunt body and the outer wall of the sample jet pipe to flow, because the shunt body is close to the sample jet orifice, when sample particles are jetted outwards from the sample jet orifice, the sample particles can be extruded by the jet air currents at two sides and flow towards the middle part of the test area, and the sample particles can not be contacted with the inner wall surface of, the optical glass windows on two sides are effectively prevented from being scratched and polluted by sample particles, so that the background noise in the testing process is reduced, the accuracy of the sample particle size testing result is improved, and the service life of the optical glass windows is prolonged. The dry method window has an ingenious structure, and the optical glass window is effectively protected from being polluted by sample dust particles by ingeniously utilizing the shape characteristic that the split fluid is wide in the middle and narrow at two ends by arranging the split fluid in front of the sample ejection port, so that the background noise in the testing process is reduced, and the accuracy of the sample particle size testing result is improved.
According to some embodiments of the invention, the flow distribution body is football shaped.
According to some embodiments of the present invention, the flow splitter has a substantially rhomboid shape with a bottom surface, the bottom surface of the flow splitter coincides with the axis of the sample nozzle, and a plane defined by two opposite side edges of the flow splitter coincides with the axis of the sample nozzle.
According to some embodiments of the present invention, a hollow channel is opened in the middle of the flow splitting body, through which the sample nozzle penetrates, and the inner diameter of the hollow channel is equal to the inner diameter of the sample nozzle.
According to some embodiments of the invention, the gas flow chamber is cylindrical and the maximum width of the flow splitter is less than the inner diameter of the gas flow chamber.
According to some embodiments of the invention, the sample ejection port has a constricted shape, and an inner diameter of the sample ejection port gradually decreases in a sample ejection direction.
According to some embodiments of the invention, an air filter element is arranged at the air inlet of the air flow cavity, a filter screen is covered on the outer wall of the air filter element, and the axis of the air filter element coincides with the axis of the sample spray pipe.
According to some embodiments of the invention, the tail end of the airflow cavity is connected with an air draft fan through a connector, and an air outlet of the air draft fan is communicated with a dust collecting device.
According to some embodiments of the present invention, the sidewall of the sample window is further provided with a mounting rail, and the sample window can be slidably mounted on the test host through the mounting rail.
A dry test system according to an embodiment of the second aspect of the invention comprises: the dry-method sample injector comprises a dry-method sample injector, a test host, a dust collecting device and the shunt protection dry-method window according to the embodiment of the first aspect of the invention, wherein the sample window is detachably arranged on the test host, a discharge hole of the dry-method sample injector is communicated with a feed inlet of a sample spray pipe, and the dust collecting device is communicated with the tail end of an airflow cavity.
The dry testing system according to the embodiment of the second aspect of the invention has at least the following advantages:
the dry method testing system has the same technical effect as the shunt protection dry method window due to the shunt protection dry method window.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a structural cross-sectional view of an embodiment of the present invention;
FIG. 3 is an exploded view of an embodiment of the present invention;
fig. 4 is a schematic view of a matching structure of a sample nozzle and a shunt body according to an embodiment of the present invention.
Wherein: sample window 100, air flow cavity 110, interface 120, sample nozzle 200, sample outlet 210, air filter 300, filter screen 310, optical glass window 400, fixed ring frame 500, sealing clamping ring 600, mounting guide 700, shunt 800, and test area 900.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, 2, 3 and 4, the present invention discloses a split stream protection dry method window, which comprises a sample window 100, two optical glass windows 400, a sample nozzle 200 and a split stream body 800.
The sample window 100 is internally provided with an airflow cavity 110 for airflow to pass through, the two optical glass windows 400 are oppositely arranged on the left side wall and the right side wall of the sample window 100, a test area 900 is formed between the two optical glass windows 400, and the optical glass windows 400 are used for laser transmission; the sample nozzle 200 is vertically inserted into the gas flow chamber 110, the sample nozzle 200 is used for sample circulation, the end of the sample nozzle 200 is provided with a sample ejection port 210, and the sample ejection port 210 faces the testing area 900.
The extending direction of the diverting body 800 is the same as the axial direction of the sample nozzle 200, the diverting body 800 is in the shape of a wide middle part and narrow ends, the diverting body 800 is in an axisymmetric structure, the plane of the axis of the sample nozzle 200 is the symmetric plane of the diverting body 800, the diverting body 800 is arranged at one end of the sample nozzle 200 close to the sample ejection port 210, and in addition, the diverting body 800 is positioned in the air flow cavity 110.
In addition, the invention also discloses a dry testing system which comprises a dry sample injector, a testing host, a dust collecting device and the shunting protection dry window, wherein the sample window body 100 is detachably arranged on the testing host, a discharge hole of the dry sample injector is communicated with a feed inlet of the sample spray pipe 200, and the dust collecting device is communicated with the tail end of the airflow cavity 110.
It should be understood that the working principle of the dry test system is as follows: the dry-method sample injector sends sample dust particles to be tested in the dry-method sample injector into the sample nozzle 200 from the discharge port, the sample dust particles to be tested are ejected from the sample ejection port 210 at the tail end of the sample nozzle 200, meanwhile, air flow provided by the test host further carries the sample dust particles ejected from the sample ejection port 210 to flow into the test area 900, an optical lens in the test host emits laser to irradiate the sample dust particles in the test area 900, image acquisition of the sample dust particles is further achieved, the acquired image is transmitted to a background analysis area, the background analysis area rapidly analyzes the image of the sample dust particles, particle size distribution information of the sample dust particles is obtained, and therefore testing of the sample dust particles is achieved.
It should be understood that, in the dry method window and dry method testing system, by arranging the flow splitter 800 before the sample ejection port 210, the air flow flows along the air flow cavity 110 to the sample ejection port 210, and the air flow may flow through the flow splitter 800 first, because the extending direction of the flow splitter 800 is consistent with the axial direction of the sample ejection pipe 200, and the flow splitter 800 is in a shape with a wide middle part and narrow ends, when the air flow flows through the flow splitter 800, the gap between the flow splitter 800 and the inner wall of the air flow cavity 110 is gradually reduced, that is, the cross-sectional area of the flow carrier of the air flow is gradually reduced, because the flow of the air flow is constant, the flow rate of the air flow is gradually increased, when the air flow flows through the middle part of the flow splitter 800, at this time, the width of the flow splitter 800 is widest, the gap between the flow splitter 800 and the inner wall of the air flow cavity 110 is smallest, and, the gap regions formed between the left and right widest ends of the flow dividing body 800 and the left and right inner walls of the airflow cavity 110 respectively constitute the jet regions of the air flow.
Then, the air flow forms a high-speed jet flow in the jet area and continues to flow towards the direction of the sample jet orifice 210, and again, thanks to the fact that the flow splitter 800 is in a shape with a wide middle part and narrow ends, that is, the connecting line between the leftmost end of the flow splitter 800 and the tail end of the flow splitter 800 is an oblique line, according to the principle of the fluid wall-attachment effect, the jet flow can be adsorbed by the rear section surface of the flow splitter 800, that is, the jet flow can be attached to the rear section surface of the flow splitter 800 and the outer wall of the sample jet pipe 200 to flow, because the flow splitter 800 is close to the sample jet orifice 210, when sample particles are jetted outwards from the sample jet orifice 210, the sample particles can be squeezed by the jet flows towards the middle part of the test area 900, so that the sample particles cannot contact with the inner wall surface of the optical glass window 400 in the process that the high-speed jet, the optical glass windows 400 on two sides are effectively prevented from being scratched and polluted by sample particles, so that the background noise in the testing process is reduced, the accuracy of the sample particle size testing result is improved, and the service life of the optical glass windows 400 is prolonged.
Obviously, the window structure of the dry method is ingenious, the shunt body 800 is arranged in front of the sample ejection port 210, the shape characteristic that the shunt body 800 is wide in the middle and narrow in the two ends is ingeniously utilized, the optical glass window is effectively protected from being polluted by sample dust particles, the background noise in the testing process is further reduced, and the accuracy of the sample particle size testing result is improved.
In some embodiments of the present invention, the flow splitter 800 has a football shape, and at this time, it is understood that the outer wall of the flow splitter 800 is a curved surface, that is, a connecting line between the beginning of the flow splitter 800, the leftmost end or the rightmost end of the flow splitter 800, and the end of the flow splitter 800 is an arched curve, and obviously, the outer wall of the entire flow splitter 800 is smoothly transited, so that the frictional resistance of the flow splitter 800 to the air flow is correspondingly reduced, the smoothness of the air flow flowing along the surface of the flow splitter 800 is improved, and the air flow is facilitated to form the jet air flow at the leftmost end and the rightmost end of the flow splitter 800.
Of course, in other embodiments, referring to fig. 2, 3 and 4, the flow splitter 800 is substantially in the shape of a rhombus with a bottom surface in a straight prism, the bottom surface of the flow splitter 800 coincides with the axis of the sample nozzle 200, and it is easy to obtain that the perpendicular bisector of the central connecting line of the two optical glass windows 400 also coincides with the axis of the sample nozzle 200, and the plane defined by the two opposite side edges of the flow splitter 800 coincides with the axis of the sample nozzle 200, so as to ensure that the flow velocity at each position on the same cross section of the gas flow chamber 110 is relatively uniform as much as possible, so that the sample dust particles ejected from the sample ejection port 210 travel along the middle of the test area 900 as much as possible, and further prevent the sample dust particles from contacting the surface of the optical glass window 400. It is apparent that this shape of the diverter 800 also achieves the above-described results.
In addition, the shape of the flow distribution body 800 can also be a structure formed by splicing two cones at the same bottom surface, and the structure has a wide middle part and two narrow ends, and the effects can be achieved as well.
In some embodiments of the present invention, referring to fig. 4 again, in order to facilitate the fitting assembly of the flow splitting body 800 and the sample nozzle 200, a hollow channel for the sample nozzle 200 to penetrate through is formed in the middle of the flow splitting body 800, and the inner diameter of the hollow channel is equal to the inner diameter of the sample nozzle 200, obviously, the flow splitting body 800 and the sample nozzle 200 may be formed into an integral piece and disposed in the airflow cavity 110, and the hollow channel is disposed so that the position of the flow splitting body 800 on the sample nozzle 200 is adjustable, so that the position of the flow splitting body 800 on the sample nozzle 200 is optimal, and the flow splitting body 800 and the sample nozzle 200 are also convenient to detach and replace.
In addition, in order to prevent the flow distribution body 800 from blocking the airflow cavity 110, the airflow cavity 110 is cylindrical, and the maximum width of the flow distribution body 800 is smaller than the inner diameter of the airflow cavity 110.
In some embodiments of the present invention, referring to fig. 2 and 4 again, in order to make the sample dust particles ejected from the sample ejection opening 210 pass through the test region 900 at a relatively high speed and make the flow speed of the sample dust particles relatively consistent with the flow speed of the air jet on both sides thereof as much as possible, so as to prevent the sample dust particles from diffusing to both sides and contacting the optical glass window 400 due to an excessively low speed, the sample ejection opening 210 is in a shape of a reduced mouth, and the inner diameter of the sample ejection opening 210 is gradually reduced along the sample ejection direction. Obviously, the flow velocity of the sample dust particles at the position where the inner diameter of the sample ejection port 210 is the smallest, that is, the flow velocity at the extreme end of the sample ejection port 210 is the largest, so that the flow velocity of the sample dust particles ejected from the sample ejection port 210 and the flow velocities of the ejected air flows at the two sides of the sample dust particles are balanced and consistent, the sample dust particles smoothly pass through the middle of the test area 900 at a high speed, the optical glass window is prevented from being polluted by the sample dust particles, and the detection efficiency and the detection accuracy of the sample dust particles are improved.
In some embodiments of the present invention, referring to fig. 1 and fig. 2 again, an air filter 300 is disposed at an air inlet of the air flow cavity 110, a filter screen 310 is covered on an outer wall of the air filter 300, and an axis of the air filter 300 coincides with an axis of the sample nozzle 200, and by disposing the air filter 300 at the air inlet of the air flow cavity 110, before the air flow enters the air flow cavity 110, impurity particles in the air flow can be effectively absorbed and filtered by the air filter 300, so that purity of the air flow is ensured, influence of ambient air quality on the sample particles is eliminated, and accuracy of a sample particle size test result is further improved.
In addition, in some embodiments of the present invention, in order to increase the flow speed of the air flow, the end of the air flow cavity 110 is connected to an air extracting fan through the interface 120, specifically, an air extracting opening of the negative fan is communicated with the end of the air flow cavity 110, an air outlet of the fan is communicated with a dust collecting device, the fan can provide a stable flow rate for the air flow, the testing efficiency of the sample particles is increased, and meanwhile, the sample particles after testing can be ensured to rapidly enter the dust collecting device to complete sample collection.
In some embodiments of the present invention, referring to fig. 1 and 3 again, in order to facilitate the detachment and replacement of the optical glass window 400, mounting holes are formed on two opposite sides of the sample window 100, a fixing ring frame 500 is detachably disposed on the mounting holes, the optical glass window 400 is embedded on the fixing ring frame 500, and in addition, a sealing pressing ring 600 is disposed between the optical glass window 400 and the fixing ring frame 500 to enhance the air tightness between the optical glass window 400 and the fixing ring frame 500 and prevent the sample particles from leaking outside.
Specifically, in this embodiment, the sample window 100 is integrally cast, the optical glass window 400 is circular, the fixing ring frame 500 is detachably fixed to the mounting hole by screws, and in order to ensure the stability of mounting the optical glass window 400, the optical glass window 400 is first fixedly embedded on the peripheral wall of the sealing clamping ring 600 by UV adhesive, and then the sealing clamping ring 600 with the optical glass window 400 embedded therein is fixed to the fixing ring frame 500 by screws, so as to complete the mounting of the optical glass window 400, and the sealing is thorough and the reliability is high.
Obviously, the arrangement of the fixed ring frame 500 and the sealing pressing ring 600 not only enhances the air tightness between the optical glass window 400 and the sample window 100, but also facilitates the disassembly and replacement of the optical glass window 400, when a larger size of the optical glass window 400 is required, a user can realize the disassembly and replacement of the optical glass window 400 by manually disassembling and replacing the fixed ring frame 500 and the sealing pressing ring 600, each component can be independently assembled, and the window is not required to be matched with a host machine in a dry testing system for online debugging, the operation and maintenance are convenient and fast, and the adaptability of the whole dry window is improved.
In some embodiments of the present invention, referring to fig. 1 and 3 again, in order to facilitate the user to quickly mount the whole dry window on the testing host of the dry testing system, the sidewall of the sample window 100 is further provided with a mounting rail 700, and the sample window 100 can be slidably mounted on the testing host through the mounting rail 700. Specifically, be provided with on the test host computer with installation guide rail 700 sliding fit's installation guide slot, obviously, whole protection window independent design, when needs change whole protection window, the user can be manual take out whole protection window from the test host computer slip, accomplish to whole protection window's quick installation and change.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A shunt protected dry window, comprising:
the sample window body is internally provided with an airflow cavity for airflow to pass through;
the two optical glass windows are oppositely arranged on the left side wall and the right side wall of the sample window body, and a test area is formed between the two optical glass windows;
the sample spray pipe is vertically arranged in the airflow cavity in a penetrating mode and is used for sample circulation, and a sample spray port is arranged at the tail end and faces the test area;
and the extension direction of the shunt body is consistent with the axial direction of the sample spray pipe, the shunt body is wide in the middle and narrow in the two ends, is arranged at one end of the sample spray pipe close to the sample spray port, and is positioned in the airflow cavity.
2. A split-flow protected dry window according to claim 1 in which the split-flow body is football shaped.
3. The window according to claim 1, wherein the splitter has a substantially rhombus-shaped rectangular prism shape with a bottom surface, the bottom surface of the splitter coincides with the axis of the sample nozzle, and a plane defined by two opposite side edges of the splitter coincides with the axis of the sample nozzle.
4. The window according to claim 3, wherein a hollow channel is formed in the middle of the flow-dividing body for the sample nozzle to pass through, and the inner diameter of the hollow channel is equal to the inner diameter of the sample nozzle.
5. The split stream protective dry window of claim 3, wherein the gas flow cavity is cylindrical and the maximum width of the split stream is less than the inner diameter of the gas flow cavity.
6. The window according to claim 1, wherein the sample ejection port is formed in a tapered shape, and an inner diameter of the sample ejection port gradually decreases in a sample ejection direction.
7. The window according to any one of claims 1 to 6, wherein an air filter is disposed at the air inlet of the air flow cavity, a filter screen is disposed on the outer wall of the air filter, and the axis of the air filter coincides with the axis of the sample nozzle.
8. The window according to any one of claims 1 to 6, wherein the end of the airflow cavity is connected to an air draft fan through a connector, and an air outlet of the air draft fan is communicated with a dust collecting device.
9. A split stream protection dry window according to any one of claims 1 to 6, wherein the sidewall of the sample window is further provided with a mounting rail, and the sample window can be slidably mounted on the test host through the mounting rail.
10. A dry test system, comprising:
a dry sample injector;
a test host;
a dust collecting device;
the split stream protection dry window of any one of claims 1 to 9, wherein the sample window is detachably mounted on the testing host, the discharge port of the dry sample injector is communicated with the feed port of the sample nozzle, and the dust collecting device is communicated with the tail end of the airflow cavity.
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| CN202110332404.0A CN113125316A (en) | 2021-03-29 | 2021-03-29 | Shunt protection dry method window and dry method test system |
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| CN202110332404.0A CN113125316A (en) | 2021-03-29 | 2021-03-29 | Shunt protection dry method window and dry method test system |
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| CN113125316A true CN113125316A (en) | 2021-07-16 |
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Application publication date: 20210716 |