On-line monitoring equipment for bezel ray method particulate matters in flue gas

Abstract

The utility model relates to the technical field of particulate matter detection, and discloses an on-line monitoring device for particulate matters in flue gas by using a Beta ray method, which comprises a case, a roll changing assembly is arranged in the case, the roll changing assembly comprises a motor bracket, a steering motor is fixedly arranged in the motor bracket, and the steering motor is connected with the motor bracket. The steering motor is fixedly connected with a steering plate through an output shaft, telescopic rods are arranged on the two sides of the outer wall of the steering plate, a fixing frame is fixedly connected to the outer walls of the telescopic rods, connecting rods are arranged at the four corners of the fixing frame, filter screen plates are arranged on the outer walls of the connecting rods, and rotating shafts are movably installed on the outer walls of the filter screen plates; by arranging the roll changing assembly, when the equipment is placed at a designated position for daily detection and the filter screen in the equipment needs to be replaced after being used up, an operator does not need to replace the filter screen, and a standby filter screen can be automatically replaced, so that the service cycle is prolonged, the overhaul frequency is increased, and the labor cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of particulate matter monitoring, and specifically relates to an on-line monitoring device for particulate matter in flue gas by the beta-ray method. Background Technique

[0002] The on-line monitoring device for particulate matter in flue gas by the beta-ray method is a device used to monitor the concentration of particulate matter in flue gas in real time. It monitors particles by using the principle of beta-ray attenuation, so as to realize the real-time measurement of the concentration levels of particulate matters such as PM2.5 and PM10 in flue gas. This device is widely used in various places that need to monitor the concentration of particulate matter in flue gas, such as factories, power plants, metallurgical enterprises, etc. It is of great significance for controlling air pollution, protecting the environment, and maintaining public health. The on-line monitoring device for particulate matter by the beta-ray method has the characteristics of high sensitivity, high resolution, and real-time performance, and can quickly and accurately measure the concentration of particulate matter in flue gas, including PM10 and PM2.5, etc. In addition, this device also has functions such as automatic calibration, data storage, and remote monitoring, and can operate unattended for a long time to ensure the accuracy of data.

[0003] For example, the Chinese patent "CN209102571U" discloses a particulate matter monitoring device, which proposes that: the output end of the particulate matter separation and sampling module is connected to the input end of the particulate matter dust sample sorting module, the output end of the particulate matter dust sample sorting module is connected to the input end of the sample gas humidity control module, the output end of the sample gas humidity control module is connected to the input end of the particulate matter sampling and detection module, and the output end of the particulate matter sampling and detection module is connected to the input end of the constant current adjustment module.

[0004] It can be seen from the above-mentioned proposed device that although a particulate matter monitoring device with relatively complete functions is proposed above, the current technical solutions still have the following deficiencies:

[0005] After the existing particulate matter monitoring device is placed, it is necessary to monitor the particulate matter in the air of the placed area for a long time. In the long-term monitoring state, the filter paper used inside will soon be used up, affecting the normal use of the machine. It is necessary for maintenance personnel to regularly repair and replace the filter paper. If there are more laying devices, the workload of replacing the filter paper is relatively large, which greatly affects the work efficiency and increases the labor cost. Content of the Utility Model

[0006] (I) Technical problems solved: In view of the deficiencies of the prior art, the utility model provides an online monitoring device for particulate matter in flue gas using the beta ray method. The device has the advantages of installing two filters during each maintenance. The filters can be automatically replaced after use, thus saving manpower and improving efficiency. The device solves the problem that after the existing particulate matter monitoring device is placed, it is necessary to monitor the particulate matter in the air in the placement area for a long time. Under long-term monitoring conditions, the filter paper used inside will soon be used up, affecting the normal use of the machine. Maintenance personnel are required to regularly inspect and replace the filter paper. If a large number of devices are installed, the workload of replacing the filter paper is large, which greatly affects the work efficiency and increases the labor cost.

[0007] (ii) Technical solution: To achieve the above-mentioned purpose, the utility model provides the following technical solution: an online monitoring device for particulate matter in flue gas using the beta ray method, comprising a support rod, a chassis arranged above the support rod, a chassis door arranged on the outside of the chassis, a roll changing assembly arranged inside the chassis, the roll changing assembly comprising a motor bracket, a steering motor fixedly installed inside the motor bracket, the steering motor fixedly connected to a steering plate via an output shaft, telescopic rods arranged on both sides of the outer wall of the steering plate, a fixed frame fixedly connected to the outer wall of the telescopic rod, connecting rods arranged at the four corners of the fixed frame, filter plates arranged on the outer wall of the connecting rod, the filter plates on the upper and lower sides of the fixed frame are mirror-imaged, a rotating shaft is movably installed on the outer wall of the filter plate, a filter is sleeved on the outer wall of the rotating shaft, one side of the rotating shaft is sleeved with a filter to be used, and the other side is sleeved with a filter after use.

[0008] Preferably, spring brackets are provided on both sides of the outer wall of the filter plate, the outer wall of the spring bracket is fixedly connected to a support spring, the outer wall of the support spring is fixedly connected to a clamping plate, a limit rod is movably installed inside the clamping plate, and the limit rod is fixedly installed on the outer wall of the filter plate.

[0009] Preferably, a wheel axle is arranged on the inner side of the clamping plate, and a limiting roller is movably installed on the outer wall of the wheel axle, and the limiting rollers on both sides fix the filter screen.

[0010] Preferably, a wind direction detector is arranged above the chassis, a wind speed detector is arranged above the chassis, steering rollers are arranged on both sides inside the chassis, and the outer walls of the steering rollers are transmission-connected with filters.

[0011] Preferably, a detection mechanism is arranged above the chassis, and the detection mechanism comprises a sampling head, the sampling head is arranged above the chassis, a radiation source is fixedly connected to the lower end of the sampling head, and a detection source is arranged relatively below the radiation source.

[0012] Preferably, an air pump is fixedly connected below the detection source through an air pipe. Air flow channels for providing air to leave are arranged inside both the detection source and the radiation source. A filter screen is provided in the gap between the radiation source and the detection source.

[0013] Preferably, limiting bearings are fixedly connected to the outer walls of both the driving motor and the driven pulley. A limiting plate is arranged on the outer wall of the limiting bearing, and a rotating shaft is installed in the limiting bearing in a limited manner.

[0014] (III) Beneficial effects: Compared with the prior art, the present utility model provides an on-line monitoring device for particulate matter in flue gas by the beta-ray method, which has the following beneficial effects:

[0015] 1. For the on-line monitoring device for particulate matter in flue gas by the beta-ray method, by setting a roll-changing assembly, when the device is placed at a designated position for daily detection and the filter screen inside the device needs to be replaced after being used up, the operator does not need to replace it, and the spare filter screen can be replaced automatically, which increases the service life and maintenance frequency, and greatly reduces the labor cost.

[0016] 2. For the on-line monitoring device for particulate matter in flue gas by the beta-ray method, clamping plates are arranged on both sides of the filter screen plate to clamp and fix the filter screen, preventing the filter screen from shifting or wrinkling during transportation, and can play a role in clamping and fixing when replacing the filter screen, preventing the filter screen from falling when the turning plate turns. Description of the drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the chassis of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the conveying assembly of the present utility model;

[0020] Figure 4 is a schematic diagram of the cross-sectional structure of the chassis of the present utility model;

[0021] Figure 5 is a front view schematic diagram of the roll-changing assembly of the present utility model;

[0022] Figure 6 is a rear view schematic diagram of the roll-changing assembly of the present utility model.

[0023] The reference numerals in the figure are:

[0024] 1. Support rod; 11. Chassis; 12. Box door; 13. Wind speed detector; 14. Wind direction detector; 15. Steering roller; 2. Detection mechanism; 21. Sampling head; 22. Radioactive source; 23. Detection source; 24. Air pump; 3. Conveying assembly; 31. Driving motor; 32. Active pulley; 33. Belt; 34. Passive pulley; 35. Limit bearing; 36. Limit plate; 4. Roll changing assembly; 41. Motor bracket; 42. Steering motor; 43. Steering plate; 44. Telescopic rod; 45. Fixed frame; 46. Connecting rod; 47. Filter plate; 48. Spring bracket; 49. Support spring; 410. Clamp; 411. Limit rod; 412. Axle; 413. Limit roller; 414. Rotating shaft; 415. Filter. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1-3 The on-line monitoring equipment of particulate matter in flue gas by beta ray method comprises a support rod 1, a chassis 11 is arranged above the support rod 1, a cabinet door 12 is arranged on the outer side of the chassis 11, a wind direction detector 14 is arranged above the chassis 11, and this instrument is used to detect the direction of wind, which is important for understanding the direction of flue gas emission and the diffusion direction of particulate matter, a wind speed detector 13 is arranged above the chassis 11, and this instrument is used to measure the wind speed, which is of great significance for understanding the speed of flue gas emission and the diffusion speed of particulate matter, steering rollers 15 are arranged on both sides inside the chassis 11, and the outer wall of the steering roller 15 is connected with a filter 415 in a transmission manner, and the steering roller is a guiding component for the movement of the filter, which ensures that the filter can move according to the predetermined path.

[0027] See also Figures 1-2, a detection mechanism 2 is arranged above the chassis 11, and the detection mechanism 2 includes a sampling head 21, which is arranged above the chassis 11. The sampling head 21 is the front end of the detection mechanism, which is arranged above the chassis and is used to collect smoke samples. It has a specific design to ensure that representative smoke samples can be effectively captured. A radioactive source 22 is fixedly connected to the lower end of the sampling head 21. The radioactive source 22 is one of the core components of the beta ray method, and it emits beta rays. These rays will be scattered or absorbed when passing through smoke containing particulate matter, resulting in changes in the intensity of the rays. A detection source 23 is arranged relatively below the radioactive source 22. The detection source 23 is located below the radioactive source and is arranged relatively. Its function is to detect the intensity of the beta rays after passing through the smoke sample and convert it into a measurable electrical signal. An air pump 24 is fixedly connected to the detection source 23 through an air pipe. The detection source 23 and the radioactive source 22 are both provided with an air flow channel for air to leave. The air pump 24 is connected to the detection source 23 through an air pipe to provide power so that the smoke sample can flow through the sampling head, the radioactive source and the detection source. The air pump 24 can ensure that the smoke sample continues to flow in the detection mechanism, thereby achieving continuous monitoring, and the gap between the radiation source 22 and the detection source 23 passes through the filter 415.

[0028] See also Figures 3-4 A conveying assembly 3 is arranged inside the chassis 11, and the conveying assembly 3 includes a driving motor 31. The driving motor 31 is arranged inside the chassis 1, and a driving pulley 32 is arranged on the outer wall of the output shaft of the driving motor 31. The driving pulley 32 is connected to a passive pulley 34 through a belt 33. The outer walls of the driving motor 31 and the passive pulley 34 are fixedly connected to a limiting bearing 35, and a limiting plate 36 is arranged on the outer wall of the limiting bearing 35.

[0029] See also Figures 4-6, a roll-changing component 4 is arranged inside the chassis 11. The roll-changing component 4 includes a motor bracket 41. A steering motor 42 is fixedly installed inside the motor bracket 41. The steering motor 42 is fixedly connected with a steering plate 43 through an output shaft. Expansion rods 44 are arranged on both sides of the outer wall of the steering plate 43. A fixed frame 45 is fixedly connected to the outer wall of the expansion rod 44. Connecting rods 46 are arranged at the four corners of the fixed frame 45. Filter plates 47 are arranged on the outer walls of the connecting rods 46. The filter plates 47 on the upper and lower sides of the fixed frame 45 are arranged in a mirror image. A rotating shaft 414 is movably installed on the outer wall of the filter plate 47. The rotating shaft 414 is fixedly installed inside a limit bearing 35. A filter screen 415 is sleeved on the outer wall of the rotating shaft 414. One side of the rotating shaft 414 is sleeved with a filter screen 415 to be used, and the other side is sleeved with a used filter screen 415. Spring brackets 48 are arranged on both sides of the outer wall of the filter plate 47. A support spring 49 is fixedly connected to the outer wall of the spring bracket 48. A clamping plate 410 is fixedly connected to the outer wall of the support spring 49. A limit rod 411 is movably installed inside the clamping plate 410. The limit rod 411 is fixedly installed on the outer wall of the filter plate 47. A wheel shaft 412 is arranged on the inner side of the clamping plate 410. A limit roller 413 is movably installed on the outer wall of the wheel shaft 412. The two limit rollers 413 fix the filter screen 415.

[0030] Working principle: First, the sampling head 21 of the device is located above the chassis 11 and is responsible for collecting flue gas samples. When the sampling head 21 collects the flue gas, the flue gas sample will enter the area between the radiation source 22 and the detection source 23 of the detection mechanism 2 and precipitate on the surface of the filter screen 415. The radiation source 22 is one of the core components of the device, and it emits beta rays. When these rays pass through the flue gas containing particulate matter, they will be scattered or absorbed. The presence of particulate matter will change the intensity of the beta rays, and this change is directly related to the concentration or size of the particulate matter. The detection source is located below the radiation source 22 and is used to detect the intensity of the beta rays after passing through the flue gas sample. The detection source 23 can convert the change in the ray intensity into a measurable electrical signal, and these signals will then be processed and analyzed to obtain the concentration or size of the particulate matter. To ensure that the flue gas sample can continuously flow through the detection area, the device is also equipped with an air pump 24. The air pump 24 is connected to the detection source through a trachea, providing power to make the flue gas sample continuously flow inside the detection mechanism to achieve continuous monitoring, and during the monitoring process, the driving motor 31 is started. Its output shaft drives the driving pulley 32 to rotate. Through the transmission of the belt 33, the driven pulley 34 will also rotate accordingly. Since the driven pulley 34 is fixedly connected to the limit bearing 35, the limit bearing 35 drives the rotating shaft 414 to rotate, and the rotating shaft 414 drives the filter screen 415 to move for detection.

[0031] Secondly, when the filter screen 415 moves, the clamping plates 410 on both sides of the filter screen 415 act through the elasticity of the support spring 49. The limiting rollers 413 provided at the outer ends of the clamping plates 410 play a role in limiting the movement of the filter screen 415, preventing the filter screen 415 from shifting during movement and preventing the filter screen 415 from wrinkling. When the filter screen 415 needs to be replaced after use, the steering motor 42 is started, and the fixed frame 45 and the filter screen plate 47 are driven to move through the steering plate 43 and the telescopic rod 44. After the filter screen to be used is rotated to a suitable position, the support spring 49 and the clamping plate 410 fix the new filter screen on the filter screen plate, and at the same time, the limiting roller 413 ensures the stability of the filter screen 415. The automatic replacement of the filter screen 415 is realized throughout the process, improving the operation efficiency and automation degree of the equipment.

[0032] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Online particulate matter monitoring equipment using beta-ray method in flue gas, including a support rod (1), with a chassis (11) arranged above the support rod (1), and a box door (12) arranged on the outer side of the chassis (11), characterized in that: A roll changing assembly (4) is arranged inside the chassis (11). The roll changing assembly (4) comprises a motor bracket (41). A steering motor (42) is fixedly mounted inside the motor bracket (41). The steering motor (42) is fixedly connected to a steering plate (43) via an output shaft. Telescopic rods (44) are arranged on both sides of an outer wall of the steering plate (43). A fixing frame (45) is fixedly connected to the outer wall of the telescopic rod (44). Connecting rods (46) are arranged at four corners of the fixing frame (45). Filter plates (47) are arranged on the outer wall of the connecting rod (46). The filter plates (47) are arranged in mirror images on the upper and lower sides of the fixing frame (45). A rotating shaft (414) is movably mounted on the outer wall of the filter plate (47). A filter screen (415) is sleeved on the outer wall of the rotating shaft (414). A filter screen (415) is sleeved on one side of the rotating shaft (414) as a filter screen to be used, and a filter screen (415) is sleeved on the other side after use.

2. The on-line monitoring equipment for particulate matter in flue gas by beta-ray method according to claim 1, characterized in that: Spring brackets (48) are provided on both sides of the outer wall of the filter plate (47); a support spring (49) is fixedly connected to the outer wall of the spring bracket (48); a clamping plate (410) is fixedly connected to the outer wall of the support spring (49); a limit rod (411) is movably installed inside the clamping plate (410); and the limit rod (411) is fixedly installed on the outer wall of the filter plate (47).

3. The on-line monitoring equipment for particulate matter in flue gas by beta-ray method according to claim 2, characterized in that: A wheel axle (412) is arranged on the inner side of the clamping plate (410), and a limiting roller (413) is movably mounted on the outer wall of the wheel axle (412), and the limiting rollers (413) on both sides fix the filter screen (415).

4. The on-line monitoring device for particulate matter in flue gas by beta-ray method according to claim 1, characterized in that: A wind direction detector (14) is arranged above the chassis (11), a wind speed detector (13) is arranged above the chassis (11), steering rollers (15) are arranged on both sides inside the chassis (11), and a filter screen (415) is drivingly connected to the outer wall of the steering roller (15).

5. The on-line monitoring equipment for particulate matter in flue gas by beta-ray method according to claim 4, characterized in that: A detection mechanism (2) is arranged above the chassis (11), the detection mechanism (2) comprising a sampling head (21), the sampling head (21) being arranged above the chassis (11), a radiation source (22) being fixedly connected to the lower end of the sampling head (21), and a detection source (23) being arranged relatively below the radiation source (22).

6. The on-line monitoring equipment for particulate matter in flue gas by beta-ray method according to claim 5, characterized in that: An air pump (24) is fixedly connected to the bottom of the detection source (23) via an air pipe, and air flow channels for air to escape are provided inside the detection source (23) and the radiation source (22), and a filter (415) passes through the gap between the radiation source (22) and the detection source (23).

7. The online monitoring device for particulate matter in flue gas by beta-ray method according to claim 1, wherein: A conveying assembly (3) is arranged inside the chassis (11), and the conveying assembly (3) comprises a driving motor (31). The driving motor (31) is arranged inside the chassis (1), and a driving pulley (32) is arranged on the outer wall of the output shaft of the driving motor (31), and the driving pulley (32) is connected to a driven pulley (34) through a belt (33).

8. The on-line monitoring device for particulate matter in flue gas by beta-ray method according to claim 1, characterized in that: The outer walls of the driving motor (31) and the driven pulley (34) are fixedly connected with limit bearings (35), the outer walls of the limit bearings (35) are provided with limit plates (36), and a rotating shaft (414) is installed in the limit bearings (35) in a limited manner.

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