CN217466596U - A Rapid Test Device for Soot Concentration Based on β-ray Method - Google Patents

Abstract

The utility model relates to a quick testing arrangement of smoke and dust concentration based on beta ray method. The utility model discloses a smoke concentration rapid test device based on a beta-ray method, which comprises a case, and a rotary driving component, a smoke sampling component and a beta-ray detection component which are arranged inside the case, wherein the rotary driving component comprises a rotary disk and a base which are horizontally arranged; the smoke sampling assembly is arranged above the rotating disc, and an exhaust port of the smoke sampling assembly is arranged above the rotating disc; the beta-ray detection assembly comprises a beta-ray generator and a photomultiplier which are oppositely arranged on the upper side and the lower side of the rotating disc, a first detection port for placing the filter paper clamping assembly is formed in the rotating disc, and the first detection port is driven to move to the position below the exhaust port or a detection area; quick testing arrangement of smoke and dust concentration, rotate through the carousel and drive filter paper and remove between sampling subassembly and beta ray detection subassembly, realized quick and accurate smoke and dust monitoring, improved the reliability of device.

Description

A Rapid Test Device for Soot Concentration Based on β-ray Method

technical field

The utility model relates to the technical field of smoke and dust detection devices, in particular to a rapid test device for smoke and dust concentration based on a beta ray method.

Background technique

Soot is the primary pollutant that affects ambient air quality. In order to reduce the emission of soot from industrial boilers, power station boilers and industrial kilns, countries around the world are conducting in-depth research and control. At present, the commonly used test methods for soot concentration are: filter weighing method, micro-oscillating balance method, light scattering test method and β-ray absorption method. The traditional filter membrane weighing method has high detection accuracy and is widely used, but this detection method requires tedious processes such as collection, drying and weighing of flue gas, which greatly increases the detection cost, time and on-site labor intensity. The β-ray absorption method is to first pass the β-ray through the cleaning filter paper and the sampling filter paper successively, and calculate the smoke concentration according to the difference between the absorbed amounts of the two times before and after the β-ray absorption. It will bring human error, and it is an accurate and fast method in the measurement method of smoke and dust. The β-ray absorption method selects filter membranes made of glass fiber, quartz and other materials. The filter membrane material should not absorb or chemically react with gaseous compounds in the exhaust gas, and should be thermally stable at the maximum sampling temperature; for standard particles with a diameter of 0.3 μm, the filter membrane’s capture efficiency is greater than 99.5%. For standard particles of 0.6 μm, the capture efficiency of the filter membrane is greater than 99.9%.

In the prior art, beta-ray soot concentration testing equipment is mainly composed of soot sampling device (sampling pipe, air pump, flow meter), preheating device, filter paper conveying device and beta-ray detection device. The main limitations are as follows:

The filter paper conveying device is mainly designed with a paper feeding mechanism, including photoelectric encoder, stepper motor, feeding/receiving wheel, guide wheel and lifting drive device, etc. The structure design is complicated, the equipment volume is large and the cost is high;

The paper feeding method usually adopts the rolling rolling method, which is easy to slip, inaccurate positioning and adhesion, etc., resulting in the leakage of flue gas and the deviation of the measurement results.

Utility model content

Based on this, the present utility model provides a rapid test device for smoke and dust concentration based on the beta ray method, which drives the filter paper to move between the sampling assembly and the beta ray detection assembly through the rotation of the turntable, so as to realize fast and accurate smoke and dust monitoring and improve the performance of the device. reliability.

The utility model provides a portable flue gas analysis tester, which comprises a case, a rotary drive assembly, a smoke sampling assembly and a beta ray detection assembly arranged inside the case, and the rotary drive assembly includes a horizontally arranged rotating disk and a base;

The soot sampling assembly is arranged above the rotating disk, and the soot sampling assembly includes an air inlet and an exhaust port, the intake port is disposed on the chassis, and the exhaust port is disposed on the rotating disk above;

The β-ray detection assembly includes a β-ray generator and a photomultiplier tube that are relatively arranged on the upper and lower sides of the rotating disk, and a detection area is formed between the β-ray generator and the photomultiplier tube;

The rotating disk is arranged above the base, and a first detection port for placing the filter paper clamping assembly is opened on the rotating disk. The rotating disk can rotate relative to the base and drive the first detection port Move to below the exhaust port or at the detection area;

When the first detection port rotates to the exhaust port, the filter paper holding assembly is in sealing fit with the exhaust port.

A first detection port is opened on the rotating disk, and the detection port is used to set the filter paper clamping assembly. The rotation of the base and the rotating disk drives the filter paper clamping assembly to move back and forth between the position of the smoke sampling assembly and the position of the β-ray detection assembly. So as to realize the sampling and detection of soot particles.

Further, an installation groove is opened under the rotating disk near the first detection port, one end of the installation groove is communicated with the inner side of the first detection port, and a clamping portion is arranged in the installation groove;

The clamping part includes a miniature cylinder and a clamping block, the clamping block is arranged on the guide rod of the miniature cylinder, when the filter paper clamping assembly is arranged at the first detection port, the clamping The tight block protrudes and abuts with the bottom of the filter paper holding assembly.

The filter paper holding assembly is fixed by the clamping part to complete the sampling and detection operations.

Further, the filter paper clamping assembly is an O-ring structure;

The filter paper clamping assembly includes a first sealing ring and a second sealing ring which are superimposed on each other, and an accommodating space for installing the filter paper is formed between the first sealing ring and the second sealing ring.

The filter paper is clamped by the first sealing ring and the second sealing ring, and at the same time of sealing, the filter paper is moved to the soot sampling assembly and the beta-ray detection assembly through the rotary drive assembly.

Further, the upper surface of the first sealing ring is provided with a sealing groove;

When the filter paper holding assembly moves to the exhaust port, the top end of the pipe wall of the exhaust port is sealed and fixed in the sealing groove.

When sampling, it is sealed and matched to avoid inaccurate detection of smoke and dust concentration caused by flue gas leakage.

Further, the first sealing ring is made of elastic rubber material.

Through the elastic deformation of the elastic structure, the compression and sealing of the filter paper clamping assembly is realized, and the pipe wall at the exhaust port is compressed at the same time to realize the sealing during sampling.

Further, a filter paper storage room is vertically arranged below the rotating disk, the filter paper storage room includes a stepping motor and a support plate, a first opening is arranged on the top of the filter paper storage room, and a plurality of filter paper storage rooms are vertically stacked in the filter paper storage room. Filter paper holding assembly;

When the first inspection port moves above the first opening, the stepper motor drives the support plate to move vertically, and the support plate pushes the uppermost filter paper holding assembly to move to the first inspection port At the opening, the clamping block protrudes and fixes the filter paper clamping assembly at the first detection opening.

The filter paper storage room sends a new filter paper holding assembly with filter paper inside to the first detection port, and is driven by the rotating disc for sampling and detection.

Further, a filter paper recovery chamber is vertically arranged below the rotating disk, and a second opening is arranged on the top of the filter paper recovery chamber;

When the first detection port moves to the second opening, the clamping block retracts, and the filter paper holding assembly falls into the filter paper recovery chamber through the second opening for storage.

The detected filter paper holder falls into the filter paper recovery chamber through the first detection port for storage and reuse.

Further, the positions of the smoke sampling assembly, the β-ray detection assembly, the filter paper storage room and the filter paper recovery room are arranged in sequence along the clockwise direction at an included angle of ninety degrees.

The filter paper holder moves to each component position in turn, so as to realize sampling and detection operations.

Further, the rotary disk is also provided with a second detection port, the second detection port is arranged on the left side of the first detection port, and the position of the second detection port is the same as the position of the first detection port The included angle is ninety degrees;

When the first detection port is located below the exhaust port, the second detection port is located at the detection area.

The two detection ports are tested at the same time to improve the detection efficiency.

Further, the smoke sampling assembly includes a preheating chamber, a smoke temperature sensor, a heating source and a blowing fan are arranged in the preheating chamber, and the preheating chamber is used to eliminate condensed water in the flue gas.

Preheating eliminates the adsorption effect of condensed water on soot particles and ensures the detection accuracy of soot concentration.

For better understanding and implementation, the technical solutions of the present utility model are described in detail below with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of a rapid test device for smoke concentration based on beta ray method in one embodiment of the present utility model;

2 is a schematic diagram of a filter paper clamping assembly of a device for rapid testing of smoke and dust concentration based on beta ray method according to an embodiment of the present utility model;

3 is a schematic diagram of a rotating disk of a rapid test device for smoke concentration based on beta ray method in an embodiment of the present utility model;

FIG. 4 is a partial cross-sectional schematic diagram of a rotating disk of a rapid test device for smoke and dust concentration based on beta ray method in one embodiment of the present utility model;

5 is a schematic diagram of a filter paper storage room of a device for rapid testing of smoke and dust concentration based on beta ray method according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a rapid test device for smoke and dust concentration based on the beta ray method in an embodiment of the present invention.

In the figure, 1-chassis; 2-rotation drive assembly; 201-rotating disk; 2011-first detection port; 2012-second detection port; 2013-clamping assembly installation position; 2014-clamping assembly recovery position; 2015- Detection area; 2016-sampling area; 202-base; 3-smoke sampling assembly; 301-air inlet; 302-exhaust port; 303-preheating chamber; 3031-smoke temperature sensor; 3032-heating source; 3033-drum Fan; 4-β-ray detection assembly; 401-β-ray generator; 402-photomultiplier tube; 5-filter paper storage room; 501-first opening, 502-support plate; 503-stepper motor; 6-filter paper recovery room ;7-Filter paper clamping assembly;701-First sealing ring;7011-Sealing groove;702-Second sealing ring;8-Clamping part;81-Micro cylinder;82-Clamping block;9-Display screen;10 - Operation panel; 11 - Side door handle; 12 - Lift handle.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show the part but not the whole content related to the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Several specific embodiments are given below to introduce the technical solutions of the present application in detail. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

Please refer to FIG. 1 , which is a schematic diagram of a rapid test device for smoke and dust concentration β-ray method in an embodiment of the present invention. The rapid test device for smoke and dust concentration β-ray method in this embodiment includes a case 1 and a rotating device disposed inside the case 1 . The drive assembly 2, the smoke sampling assembly 3 and the beta-ray detection assembly 4, the chassis 1 is a rectangular box body, the interior of which forms an accommodation space, and the chassis 1 is provided with an air inlet and an exhaust port.

In the above embodiment, a rotary drive assembly 2 is horizontally disposed in the middle position of the box body 1. The rotary drive assembly 2 includes a rotary disk 201 and a base 202. The rotary disk 201 and the base 202 are cylindrical structures, and the rotary disk 201 and the base An accommodating space is formed between 202 , and the rotating disk 201 is driven by the base 202 to rotate on a horizontal plane. In other examples, the connection relationship between the rotary disk 201 and the base 202 may also be other structures that enable the rotary disk 201 to rotate horizontally, such as connection through a rotating shaft.

As shown in FIG. 1 and FIG. 3 , in one embodiment, the rotary disk 201 is provided with a first detection port 2011 and a second detection port 2012 , and the first detection port 2011 and the second detection port 2012 are used for installing filter paper clamps Component 7, the first detection port 2011 and the second detection port 2012 are through-hole structures passing through the rotary disk 201. Preferably, the first detection port 2011 is located on the surface of the rotary disk 201 close to its edge, and the second detection port 2012 is provided The distance between the center of the second detection port 2012 and the center of the rotating disk 201 is the same as the distance from the center of the first detection port 2011 to the rotation The distances between the centers of the disks 201 are equal. In other examples, the number and position of the detection ports can be adjusted as required.

Please refer to FIG. 4 , which is a schematic cross-sectional view of a rotating disk of a rapid testing device for smoke concentration beta-ray method in an embodiment of the present invention. In this embodiment, the lower surface of the rotating disk 201 is close to the first detection port 2011 and the second detection port 2011 The inner wall of the port 2012 is provided with an opposite installation groove, one end of the installation groove is connected to the detection port, and a clamping part 8 is arranged on the installation groove. on the guide rod of the micro cylinder 81. When the filter paper clamping assembly 7 is not set at the detection port, the clamping block 82 is in a retracted state and is accommodated in the installation groove. When the filter paper clamping assembly 7 is set at the detection port, the micro cylinder 81 pushes the clamping block 82 Extend and abut against the bottom of the filter paper holding assembly 7 to fix the filter paper holding assembly 7 at the detection port. In other examples, the number of clamping parts 8 can be set to different numbers as required, or the clamping blocks 82 can also be other structures used to fix the position of the filter paper clamping assembly 7, and the filter paper can be adjusted by the control element. Fixing and unfixing of the clamp assembly 7 .

As shown in FIG. 2 , in one embodiment, the filter paper holding assembly 7 is specifically an O-ring structure, which includes a first sealing ring 701 and a second sealing ring 702 that are superimposed on top of each other. The first sealing ring 701 and the second sealing ring 701 An accommodating space for installing filter paper is formed between the two sealing rings 702. Preferably, the bottom of the first sealing ring 701 is provided with an engaging groove, and the top of the second sealing ring 702 is provided with an engaging portion. The snap fit of the joint makes the first sealing ring 701 and the second sealing ring 702 clamp the filter paper. In other examples, the connection manner between the first sealing ring 701 and the second sealing ring 702 may also be other implementation manners and structures that ensure the premise of sealing.

Preferably, the first sealing ring 701 is an elastic rubber structure. Due to the elastic deformation of the first sealing ring 701, the gap between the first sealing ring 701 and the second sealing ring 702 can be further reduced. The top of a sealing ring 701 is provided with a sealing groove 7011. Preferably, the inner side wall of the sealing groove 7011 is higher than the outer side wall. precision.

As shown in FIG. 1 , in one embodiment, a fume sampling assembly 3 is provided above the rotating disk 201 , and the fume sampling assembly 3 includes an air inlet 301 , an exhaust port 302 and a preheating chamber 303 , and the preheating chamber 303 is arranged horizontally Above the rotating disk 201, the left end of the preheating chamber 303 is connected to the air inlet 301, and is communicated with the outside of the chassis through the air inlet 301, and the right end of the preheating chamber 303 is connected to the exhaust port 302 through an L-shaped air duct, and The exhaust port 302 is arranged vertically above the rotating disk 201 .

Preferably, when the rotating disk 201 drives the detection port to rotate below the fume sampling assembly 3 , the position of the exhaust port 302 corresponds to the position of the first sealing ring 701 , and the wall of the air duct at the exhaust port 302 is inserted into the sealing groove 7011 .

Preferably, the air duct at the right end of the preheating chamber 303 is of a retractable structure. Driven by the driving element, when the filter paper holding assembly 7 rotates to the bottom of the exhaust port 302, the air duct extends downward and moves the exhaust gas. The port 302 is inserted into the sealing groove 7011 to form a sealing fit. Specifically, the driving element may be an electric push rod (not shown in the figure), and one end of the rod is fixedly connected with the exhaust port 302 to drive the exhaust port 302 to move up and down.

In the above embodiment, the preheating chamber 303 is provided with a smoke temperature sensor 3031, a heating source 3032 and a blower fan 3033. The smoke temperature sensor 3031 is arranged near the air inlet 301 and detects the temperature of the inflowing smoke and dust. The temperature in the preheating chamber 303 is controlled by the heating source 3032 to be maintained between 120 and 130°C, preferably 130°C.

Preferably, the heating source 3032 is an electric heating wire structure, and the heating of the heating wire is controlled by the control element through the temperature of the flue gas and soot collected by the smoke temperature sensor 3031 .

As shown in FIG. 1 , in one embodiment, the beta-ray detection assembly 4 includes a beta-ray generator 401 and a photomultiplier tube 402 , the beta-ray generator 401 is disposed above the rotating disk 201 , and the photomultiplier tube 402 is disposed on the rotating disk Below 201, preferably, a detection area 2015 is formed between the β-ray generator 401 and the photomultiplier tube 402. When the filter paper holding assembly 7 rotates to the detection area 2015, the β-rays emitted by the β-ray generator 401 are limited to just pass through. The filter paper holds the center position of the filter paper in the assembly 7 and conducts it to the photomultiplier tube 402 . In other examples, the arrangement order of the beta-ray generator 401 and the photomultiplier tube 402 can be adjusted as required, and the specific structure of the beta-ray detection assembly 4 can also be changed as required.

As shown in FIG. 1 and FIG. 5 , in one embodiment, a filter paper storage room 5 and a filter paper recovery room 6 are provided in the accommodation space between the turntable 201 and the base 202 , and the filter paper storage room 5 and the filter paper recovery room 6 are circular A cylindrical structure with a cavity for accommodating the filter paper holding assembly 7 is formed inside, the top of the filter paper storage chamber 5 is provided with a first opening 501 with the same diameter as the detection port, and the top of the filter paper recovery chamber 6 is provided with a diameter of the detection port. The same second opening, the filter paper holding assembly 7 moves from the filter paper storage chamber 5 to the detection port through the first opening 501 to be fixed, and falls into the filter paper recovery chamber 6 through the second opening for storage.

Preferably, a support plate 502 and a stepper motor 503 are provided in the filter paper storage room 5. In the example shown in FIG. 5, a plurality of filter paper holding assemblies 7 are stacked and disposed inside the filter paper storage room 5, and the support plate 502 is supported from below. The filter paper holding assembly 7 pushes the support plate 502 to move upward via the stepper motor 503 . When the uppermost filter paper holding assembly 7 moves to the detection port, the clamping block 82 extends and fixes the position of the filter paper holding assembly 7 .

Preferably, the upper surface of the filter paper holding assembly 7 and the upper surface of the rotating disk are arranged horizontally.

In the above embodiment, after the detection is completed, when the filter paper holding assembly 7 moves above the second opening, the clamping block 82 is retracted, and the filter paper holding assembly 7 is retracted due to gravity and falls into the filter paper recovery chamber 6 for storage.

As shown in FIG. 1 , in one embodiment, the smoke sampling assembly 3 , the beta-ray detection assembly 4 , the filter paper storage room 5 and the filter paper recovery room 6 are arranged in sequence at a 90-degree angle in the clockwise direction, with the rotating disk 201 as the Referring to, as shown in FIG. 3 , four regions forming an included angle of ninety degrees are formed on the rotary disk 201 .

The exhaust port 302 of the fume sampling assembly 3 is located above the sampling area 2016, the beta ray generator 401 and the photomultiplier tube 402 are located on the upper and lower sides of the monitoring area 2015, and the first opening 501 at the top of the filter paper storage compartment 5 is located at the installation of the clamping assembly Below the position 2013 , the second opening at the top of the filter paper recovery chamber 6 is located below the holding assembly recovery position 2014 . In other examples, the arrangement sequence of each component can also be adjusted as required.

As shown in FIG. 6 , in one embodiment, a display screen 9 and a control panel 10 are arranged on the front of the chassis 1, and commands are issued through the control panel 10, and the PLC control unit inside the chassis 1 controls the various components to cooperate to perform detection operations, and The measured data is sent to the display screen 9. A side door is provided on the right side of the chassis 1, and a side door handle 11 is provided on the side door. Through the side door, various components inside the chassis 1 are repaired and replaced.

Preferably, the top of the chassis 1 is also provided with a pull handle 12 for carrying the entire device.

Preferably, the chassis 1 is also provided with a USB data interface. In other examples, data transmission may also be achieved by means of Bluetooth, WiFi, or 5G signals.

Preferably, a battery assembly for supplying power to each component is also provided inside the chassis 1 .

Preferably, the chassis 1 is further provided with a power interface for directly supplying power to each component of the device or charging the battery components inside the chassis.

Preferably, an air pump can also be arranged inside the case, the air pump is connected to the air duct, and the air inlet of the air duct is arranged below the sampling area 2016. When the filter paper clamping assembly 7 is sealed with the exhaust port 302, the smoke flows through the filter paper. After that, the soot particles remain on the filter paper, and the remaining flue gas flows into the air pump through the air duct.

In the smoke concentration beta-ray method rapid testing device in this embodiment, multiple groups of sampling ports and beta-ray detection components 4 can be added as required, so as to realize simultaneous testing of multiple groups and improve efficiency.

When the soot concentration beta-ray method rapid test device in this embodiment starts to operate:

The first detection port 2011 is located at the clamping assembly installation position 2013, the second detection port 2012 is located at the clamping assembly recovery position 2014, and the filter paper clamping assembly 7 in the filter paper storage chamber 5 moves upward to the first detection port 2011, and It is fixed by the clamping part 8 .

Then the base 202 drives the rotating disc 201 to rotate 90 degrees counterclockwise, the first detection port 2011 drives the filter paper holding assembly 7 to move to the monitoring area 2015 and performs pre-detection, and saves the first pre-detection data. At this time, the second detection port 2012 Rotate to the clamping assembly installation position 2013 and fix the new filter paper clamping assembly 7. At this time, the preheating chamber 303 is preheated and kept at temperature, ready for sampling.

The rotary disk 201 is rotated 90 degrees counterclockwise, the first detection port 2011 reaches the sampling area 2016, and the sampling port is sealed with the first sealing ring 701 to perform sampling. At this time, the filter paper holding assembly 7 at the second detection port 2012 is located at Monitor area 2015 and perform pre-detection, and save the second pre-detection data.

The rotary disk 201 is rotated 90 degrees counterclockwise, the first detection port 2011 reaches the clamping assembly recovery position 2014 , and the second detection port 2012 is located at the sampling area 2016 for sampling.

Then the rotary disk 201 is rotated 90 degrees clockwise, the first detection port 2011 reaches the sampling area 2016, the second detection port 2012 reaches the monitoring area 2015, and the second pre-detection data is called as the standard value to detect the concentration of smoke and dust.

After the detection is completed, the rotating disk 201 is rotated 90 degrees clockwise, the first detection port 2011 reaches the monitoring area 2015, and the first pre-detection data is called to detect the concentration of smoke and dust, and the second detection port 2012 reaches the clamping component installation position 2013 place.

After the detection is completed, the rotary disk 201 is rotated 90 degrees clockwise, the first detection port 2011 reaches the clamping assembly installation position 2013, the second detection port 2012 reaches the clamping assembly recovery position 2014, the clamping block 82 is retracted, and the filter paper is clamped The assembly 7 falls into the filter paper recovery chamber 6 for preservation.

The rotary disk 201 is rotated 90 degrees clockwise, the first detection port 2011 reaches the clamping assembly recovery position 2014 and the filter paper clamping assembly 7 is recovered, and the second detection port 2012 is located at the sampling area 2016 .

Finally, the rotary disk 201 rotates 90 degrees counterclockwise, the first detection port 2011 and the second detection port 2012 return to the initial positions, and the above-mentioned actions are repeated.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims (10)

1. A quick testing arrangement of smoke and dust concentration based on beta ray method which characterized in that includes:

the smoke dust sampling device comprises a case, and a rotary driving assembly, a smoke dust sampling assembly and a beta ray detection assembly which are arranged in the case, wherein the rotary driving assembly comprises a rotary disc and a base which are horizontally arranged;

the smoke and dust sampling assembly is arranged above the rotating disc and comprises an air inlet and an air outlet, the air inlet is arranged on the case, and the air outlet is arranged above the rotating disc;

the beta ray detection assembly comprises a beta ray generator and a photomultiplier tube which are oppositely arranged on the upper side and the lower side of the rotating disc, and a detection area is formed between the beta ray generator and the photomultiplier tube;

the rotating disc is arranged above the base, a first detection port for placing the filter paper clamping assembly is formed in the rotating disc, the rotating disc can rotate relative to the base and drive the first detection port to move to the position below the exhaust port or the detection area;

when the first detection port rotates to the air outlet, the filter paper clamping assembly is in sealing fit with the air outlet.

2. The rapid smoke concentration testing device based on the beta-ray method according to claim 1, characterized in that:

an installation groove is formed below the rotating disc and close to the first detection port, one end of the installation groove is communicated with the inner side of the first detection port, and a clamping part is arranged in the installation groove;

the clamping part comprises a micro cylinder and a clamping block, the clamping block is arranged on a guide rod of the micro cylinder, and when the filter paper clamping assembly is arranged at the first detection port, the clamping block extends out and is abutted to the bottom of the filter paper clamping assembly.

3. The rapid smoke concentration testing device based on the beta-ray method according to claim 2, characterized in that:

the filter paper clamping component is of an O-shaped sealing ring structure;

the filter paper clamping assembly comprises a first sealing ring and a second sealing ring which are mutually overlapped, and an accommodating space for installing filter paper is formed between the first sealing ring and the second sealing ring.

4. The rapid smoke concentration testing device based on the beta-ray method according to claim 3, characterized in that:

a sealing groove is formed in the upper surface of the first sealing ring;

when the filter paper clamping assembly moves to the air outlet, the top end of the pipe wall of the air outlet is fixed in the sealing groove in a sealing mode.

5. The beta-ray method-based smoke concentration rapid testing device according to claim 4, characterized in that:

the first sealing ring is made of elastic rubber materials.

6. The rapid smoke concentration testing device based on the beta-ray method according to claim 2, characterized in that:

a filter paper storage chamber is vertically arranged below the rotating disc and comprises a stepping motor and a support plate, a first opening is formed in the top of the filter paper storage chamber, and a plurality of filter paper clamping assemblies are vertically overlapped in the filter paper storage chamber;

when the first detection port moves to the position above the first opening, the stepping motor drives the supporting plate to move vertically, the supporting plate pushes the uppermost filter paper clamping assembly to move to the position of the first detection port, and the clamping block extends out and fixes the filter paper clamping assembly to the position of the first detection port.

7. The beta-ray method-based smoke concentration rapid testing device according to claim 6, characterized in that:

a filter paper recovery chamber is vertically arranged below the rotating disc, and a second opening is formed in the top of the filter paper recovery chamber;

when the first detection port moves to the second opening, the clamping block retracts, and the filter paper clamping assembly falls into the filter paper recovery chamber through the second opening for storage.

8. The rapid smoke concentration testing device based on the beta-ray method according to claim 7, characterized in that:

the smoke sampling assembly, the beta ray detection assembly, the filter paper storage chamber and the filter paper recycling chamber are sequentially arranged along the clockwise direction at ninety-degree included angles.

9. The rapid smoke concentration testing device based on the beta-ray method according to claim 1, characterized in that:

the rotating disc is also provided with a second detection port, the second detection port is arranged on the left side of the first detection port, and the included angle between the position of the second detection port and the position of the first detection port is ninety degrees;

when the first detection port is located below the exhaust port, the second detection port is located at the detection region.

10. The rapid smoke concentration testing device based on the beta-ray method according to claim 1, characterized in that:

the smoke dust sampling assembly comprises a preheating chamber, a smoke temperature sensor, a heating source and a blowing fan are arranged in the preheating chamber, and the preheating chamber is used for eliminating condensed water in smoke.

Images