Self-cleaning flue particulate matter measuring instrument

Abstract

The utility model discloses a self-cleaning flue particulate matter measuring instrument which comprises two measuring gas chambers, target sample gas channels are fixedly connected to the inner sides of the two measuring gas chambers, through holes used for flue gas communication are formed between the measuring gas chambers and the target sample gas channels, an emission light source assembly is fixedly connected to the inner side of the measuring gas chamber on one side, and an emission light source assembly is fixedly connected to the inner side of the measuring gas chamber on the other side. The inner side of the target sample gas channel on the other side is fixedly connected with a sampling detection assembly, and the inner sides of the two measuring gas chambers are fixedly connected with alcohol cleaning mechanisms; the hollow column is driven by the motor to rotate, the brush fixed to one side of the hollow column is driven to rotate synchronously, alcohol is conveyed to the hollow column through external equipment, then the alcohol evenly flows out through liquid outlet holes in the brush and infiltrates the brush, and in the rotating process of the brush, the alcohol can soften dust attached to the emission light source assembly and the sampling detection assembly, so that the detection efficiency is improved. And in cooperation with mechanical friction of the brush, the dust can be brushed off more effectively, and deep cleaning is achieved.

Description

Technical Field

[0001] This utility model relates to the field of particulate matter measurement technology, specifically a self-cleaning flue gas particulate matter measuring instrument. Background Technology

[0002] Currently, this method is widely used in particulate matter concentration detection both domestically and internationally. It works by using light that, after passing through dust particles in a measuring chamber, experiences reduced light intensity as the dust particles scatter the light in various directions. The intensity of the light signal in each scattering direction is proportional to the concentration of the dust particles. By converting the intensity of the scattered light signal into an electrical signal, the concentration of the particulate matter can be calculated.

[0003] In existing technologies, gas blowing is commonly used to clean dust from the lens of measuring instruments to maintain detection accuracy. However, this method has significant drawbacks. The environment inside the flue is complex, with diverse dust components, some of which are highly adhesive. Gas blowing alone is insufficient to completely remove dust from the lens. Some fine particles can also easily adhere to the optical coating on the lens surface. The impact force of the gas cannot effectively remove these stubborn stains. Over time, the dust residue on the lens will accumulate, obstructing light transmission. This causes the light emitted by the light source component to scatter and attenuate as it passes through the lens, resulting in a decrease in the quality of the light signal received by the sampling and detection component. Consequently, the accuracy of the measurement data is affected.

[0004] Therefore, this utility model provides a self-cleaning flue gas particulate matter measuring instrument to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a self-cleaning flue gas particulate matter measuring instrument, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a self-cleaning flue gas particulate matter measuring instrument, comprising two measuring gas chambers, a target sample gas channel fixedly connected to the inner side of the two measuring gas chambers, a through hole for flue gas communication between the measuring gas chambers and the target sample gas channel, an emitting light source assembly fixedly connected to the inner side of one measuring gas chamber, and a sampling and detection assembly fixedly connected to the inner side of the target sample gas channel on the other side, wherein the emitting light source assembly, the sampling and detection assembly and the through hole are located on the same axis;

[0007] Both measuring gas chambers are fixedly connected to an alcohol cleaning mechanism for cleaning the emission light source assembly and the sampling and detection assembly. The alcohol cleaning mechanism includes a limiting frame fixedly connected to the inner wall of the measuring gas chamber. A limiting groove is formed on the inner side of the limiting frame. A hollow column is rotatably connected inside the limiting groove. A brush is fixedly connected to the side of the hollow column near the emission light source assembly or the sampling and detection assembly. A connecting pipe is fixedly connected to the outer side of the hollow column. The connecting pipe passes through the measuring gas chamber and connects to an external device. The connecting pipe communicates with the interior of the hollow column. An outlet hole is formed inside the brush and communicates with the interior of the hollow column. A motor is fixedly connected to the outer side of the limiting frame. The output shaft of the motor passes through the limiting frame and is drivenly connected to the hollow column.

[0008] Preferably, a gas cleaning mechanism for blowing away dust from the emission light source assembly and the sampling and detection assembly is fixedly installed on the top of both measuring gas chambers. The gas cleaning mechanism includes a gas guide pipe fixedly connected to the top of the measuring gas chamber. A compressed air inlet for connecting to an external gas supply device is fixedly connected to the top of the gas guide pipe. A nozzle is fixedly connected to the bottom of the gas guide pipe. The nozzle is located inside the measuring gas chamber and is positioned directly above the emission light source assembly and the sampling and detection assembly.

[0009] Preferably, the outer side of the measuring gas chamber is fixedly connected to an opening and closing mechanism for use with a gas cleaning mechanism. The opening and closing mechanism includes a base plate fixedly connected to the bottom of the measuring gas chamber, a dividing plate fixedly connected to the top of the base plate, and a first through hole and a second through hole opened on the outer side of the base plate. The first through hole and the second through hole are located on both sides of the dividing plate and do not contact the dividing plate.

[0010] Preferably, the base plate has two mounting grooves inside, and a first baffle and a second baffle are slidably connected inside the two mounting grooves respectively. The size of the first baffle and the first through hole are fitted together, and the size of the second baffle and the second through hole are fitted together.

[0011] Preferably, racks are provided on the outer sides of both the second baffle and the first baffle, a mounting box is fixedly connected to the outer side of the measuring air chamber, a drive motor is fixedly connected to the top of the mounting box, a gear is fixedly connected to the outer side of the output shaft of the drive motor, and the racks on the outer sides of the first baffle and the second baffle mesh with the gears respectively, and the two racks are symmetrically arranged on both sides of the gears.

[0012] Preferably, the mounting slot is connected to the mounting box, and both racks and the gear are disposed inside the mounting box.

[0013] Beneficial effects

[0014] This invention provides a self-cleaning flue gas particulate matter measuring instrument. Compared with the prior art, it has the following advantages:

[0015] (1) The self-cleaning flue gas particulate matter measuring instrument drives the hollow column to rotate by a motor, which drives the brush fixed on one side to rotate synchronously. The external equipment delivers alcohol to the hollow column, and the alcohol flows out evenly through the liquid outlet hole inside the brush to wet the brush. During the rotation of the brush, the alcohol can soften the dust attached to the light source component and the sampling and detection component, reduce the adhesion between the dust and the surface of the equipment, and, together with the mechanical friction of the brush, can more effectively brush off the dust and achieve deep cleaning.

[0016] (2) In this self-cleaning flue gas particulate matter measuring instrument, compressed gas is sprayed out from the nozzle to clean the dust. When the gas cleaning mechanism is working, the drive motor in the opening and closing mechanism drives the gear to rotate, controlling the movement of the first baffle and the second baffle. During cleaning, the first through hole and the second through hole are opened to discharge the dust, thereby avoiding the dust from flying inside the measuring gas chamber during cleaning. After cleaning, the first through hole and the second through hole are closed to prevent the flue gas from overflowing and affecting the detection results. Attached Figure Description

[0017] Figure 1 This is a perspective view of the external structure of this utility model;

[0018] Figure 2 This is a perspective view of the external structure of this utility model from another angle;

[0019] Figure 3 This is a cross-sectional structural schematic diagram of the measuring chamber of this utility model;

[0020] Figure 4 This is a schematic diagram of the disassembled structure of the alcohol cleaning mechanism of this utility model;

[0021] Figure 5 This is a cross-sectional view of the mounting box in the opening and closing mechanism of this utility model.

[0022] Figure 6 This is a schematic diagram of the disassembled structure of the opening and closing mechanism of this utility model.

[0023] In the diagram: 1. Measuring gas chamber; 2. Target sample gas channel; 3. Gas cleaning mechanism; 31. Compressed gas inlet; 32. Gas guide pipe; 33. Nozzle; 4. Opening and closing mechanism; 41. Dividing plate; 42. Base plate; 43. First through hole; 44. Second through hole; 45. First baffle; 46. Second baffle; 47. Mounting box; 48. Drive motor; 49. Gear; 410. Rack; 411. Mounting groove; 5. Emitting light source assembly; 6. Sampling and detection assembly; 7. Alcohol cleaning mechanism; 71. Limiting frame; 72. Limiting groove; 73. Hollow column; 74. Brush; 75. Connecting pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1:

[0026] Please see Figures 1-6 A self-cleaning flue gas particulate matter measuring instrument includes two measuring gas chambers 1. A target sample gas channel 2 is fixedly connected to the inner side of the two measuring gas chambers 1. A through hole for flue gas communication is opened between the measuring gas chambers 1 and the target sample gas channel 2. An emission light source assembly 5 is fixedly connected to the inner side of one measuring gas chamber 1, and a sampling and detection assembly 6 is fixedly connected to the inner side of the target sample gas channel 2 on the other side. The emission light source assembly 5, the sampling and detection assembly 6 and the through hole are located on the same axis.

[0027] Alcohol cleaning mechanisms 7 for cleaning the emission light source assembly 5 and the sampling and detection assembly 6 are fixedly connected to the inner sides of both measuring gas chambers 1. The alcohol cleaning mechanism 7 includes a limiting frame 71 fixedly connected to the inner wall of the measuring gas chamber 1. A limiting groove 72 is opened on the inner side of the limiting frame 71. A hollow column 73 is rotatably connected inside the limiting groove 72. A brush 74 is fixedly connected to the side of the hollow column 73 near the emission light source assembly 5 or the sampling and detection assembly 6. A connecting pipe 75 is fixedly connected to the outer side of the hollow column 73. The connecting pipe 75 passes through the measuring gas chamber 1 and is connected to an external device. The connecting pipe 75 communicates with the inside of the hollow column 73. An outlet hole is opened inside the brush 74 and communicates with the inside of the hollow column 73. A motor is fixedly connected to the outer side of the limiting frame 71. The output shaft of the motor passes through the limiting frame 71 and is connected to the hollow column 73 for transmission.

[0028] First, the measuring gas chamber 1 and the target sample gas channel 2 are installed at the flue to be tested. During testing, the light source component 5 emits light. The light passes through the through hole between the measuring gas chamber 1 and the target sample gas channel 2 and passes through the flue gas in the target sample gas channel 2. Since there are particulate matter in the flue gas, the light will be scattered and absorbed. The sampling and detection component 6 is used to receive the light after it has passed through the flue gas and convert the light signal into an electrical signal or other detectable signal. By analyzing these signals, relevant information about the particulate matter in the flue can be obtained, such as concentration, particle size distribution and other parameters (the above is the existing laser scattering method for measuring flue gas, which will not be elaborated on here).

[0029] During the measurement process, in order to ensure that the measurement accuracy of the emission light source assembly 5 and the sampling and detection assembly 6 is not affected by dust and other impurities, the alcohol cleaning mechanism 7, the opening and closing mechanism 4 and the gas cleaning mechanism 3 will work every once in a while to clean the smoke and dust attached to the emission light source assembly 5 and the sampling and detection assembly 6.

[0030] The motor driving the hollow column 73 of the alcohol cleaning mechanism 7 reciprocates periodically. Its maximum displacement stroke is when the hollow column 73 contacts both ends of the limiting groove 72, thereby causing the brush 74 to rotate periodically. At the same time, the external equipment delivers alcohol into the hollow column 73 through the connecting pipe 75. The alcohol flows out through the liquid outlet hole inside the brush 74, thereby performing a double cleaning of the dust attached to the emitting light source assembly 5 and the sampling and detection assembly 6. At the same time, the alcohol also prevents water vapor from adhering to the inside of the measuring gas chamber 1 (because alcohol is volatile and will not accumulate inside the measuring gas chamber 1).

[0031] Example 2:

[0032] Please see Figures 1-6 This embodiment provides a technical solution based on Embodiment 1: A gas cleaning mechanism 3 for blowing away dust from the emission light source assembly 5 and the sampling and detection assembly 6 is fixedly installed on the top of each of the two measuring gas chambers 1. The gas cleaning mechanism 3 includes a gas guide pipe 32 fixedly connected to the top of the measuring gas chamber 1. A compressed air inlet 31 for connecting to an external gas supply device is fixedly connected to the top of the gas guide pipe 32. A nozzle 33 is fixedly connected to the bottom of the gas guide pipe 32. The nozzle 33 is located inside the measuring gas chamber 1 and is positioned directly above the emission light source assembly 5 and the sampling and detection assembly 6. An opening and closing mechanism 4 for use with the gas cleaning mechanism 3 is fixedly connected to the outside of the measuring gas chamber 1. The opening and closing mechanism 4 includes a base plate 42 fixedly connected to the bottom of the measuring gas chamber 1. A dividing plate 41 is fixedly connected to the top of the base plate 42. A first through hole 43 and a second through hole 44 are provided on the outside of the base plate 42. 3 and the second through hole 44 are located on both sides of the dividing plate 41 and do not contact the dividing plate 41. The bottom plate 42 has two mounting grooves 411 inside. The first baffle 45 and the second baffle 46 are slidably connected inside the two mounting grooves 411 respectively. The dimensions of the first baffle 45 and the first through hole 43 are fitted together. The dimensions of the second baffle 46 and the second through hole 44 are fitted together. The outer sides of the second baffle 46 and the first baffle 45 are provided with racks 410. The outer side of the measuring air chamber 1 is fixedly connected to the mounting box 47. The top of the mounting box 47 is fixedly connected to the drive motor 48. The outer side of the output shaft of the drive motor 48 is fixedly connected to the gear 49. The racks 410 on the outer sides of the first baffle 45 and the second baffle 46 respectively mesh with the gear 49. The two racks 410 are symmetrically arranged on both sides of the gear 49. The mounting grooves 411 are connected to the mounting box 47. The two racks 410 and the gear 49 are both located inside the mounting box 47.

[0033] The gas cleaning mechanism 3 is connected to an external gas supply device through the compressed gas inlet 31. Compressed gas is sprayed out from the nozzle 33 through the air guide pipe 32 to blow away dust from the emission light source assembly 5 and the sampling and detection assembly 6. While the gas is cleaning, the opening and closing mechanism 4 drives the gear 49 to rotate through the drive motor 48, which in turn moves the first baffle 45 and the second baffle 46 that mesh with the gear 49. This controls the opening of the first through hole 43 and the second through hole 44, which work in conjunction with the gas cleaning mechanism 3. When the gas cleaning mechanism 3 is working, the first through hole 43 and the second through hole 44 are opened, so that the dust accumulated inside the measuring gas chamber 1 is blown out through the first through hole 43 and the second through hole 44, thus preventing the dust from flying inside the measuring gas chamber 1 during cleaning. After cleaning, the first through hole 43 and the second through hole 44 are closed to prevent the flue gas in the flue from overflowing through the first through hole 43 and the second through hole 44, which would affect the accuracy of the detection results of the emission light source assembly 5 and the sampling and detection assembly 6.

[0034] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0035] Working principle: During operation, the measuring gas chamber 1 and the target sample gas channel 2 are first installed at the flue gas detection point. During detection, the light source component 5 emits light, which passes through the flue gas. The sampling and detection component 6 receives the light and converts it into a signal, and analyzes it to obtain information related to particulate matter in the flue gas.

[0036] During the measurement, in order to ensure the accuracy of the emission light source component 5 and the sampling and detection component 6, the alcohol cleaning mechanism 7, the opening and closing mechanism 4 and the gas cleaning mechanism 3 work regularly. The motor of the alcohol cleaning mechanism 7 drives the hollow column 73 to rotate, causing the brush 74 to rotate. The externally delivered alcohol flows out through the liquid outlet to clean the dust and prevent water vapor from accumulating.

[0037] The gas cleaning mechanism 3 is connected to an external gas supply device. Compressed gas is sprayed out from the nozzle 33 to clean the dust. When the gas cleaning mechanism 3 is working, the drive motor 48 in the opening and closing mechanism 4 drives the gear 49 to rotate, controlling the movement of the first baffle 45 and the second baffle 46. During cleaning, the first through hole 43 and the second through hole 44 are opened to discharge the dust. After cleaning, the first through hole 43 and the second through hole 44 are closed to prevent the flue gas from overflowing and affecting the test results.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning flue particulate matter measuring instrument comprising two measuring chambers (1), characterized in that: The inner sides of the two measuring gas chambers (1) are fixedly connected to a target sample gas channel (2). A through hole for flue gas communication is provided between the measuring gas chamber (1) and the target sample gas channel (2). An emission light source assembly (5) is fixedly connected to the inner side of one measuring gas chamber (1), and a sampling detection assembly (6) is fixedly connected to the inner side of the target sample gas channel (2) on the other side. The emission light source assembly (5), the sampling detection assembly (6) and the through hole are located on the same axis. Alcohol cleaning mechanisms (7) for cleaning the emission light source assembly (5) and the sampling and detection assembly (6) are fixedly connected to the inner sides of both measuring gas chambers (1). The alcohol cleaning mechanism (7) includes a limiting frame (71) fixedly connected to the inner wall of the measuring gas chamber (1). A limiting groove (72) is opened on the inner side of the limiting frame (71). A hollow column (73) is rotatably connected inside the limiting groove (72). The hollow column (73) is located on the side close to the emission light source assembly (5) or the sampling and detection assembly (6). A brush (74) is fixedly connected to the hollow column (73), and a connecting pipe (75) is fixedly connected to the outside of the hollow column (73). The connecting pipe (75) passes through the measuring gas chamber (1) and is connected to an external device. The connecting pipe (75) communicates with the inside of the hollow column (73). A liquid outlet hole is opened inside the brush (74) and communicates with the inside of the hollow column (73). A motor is fixedly connected to the outside of the limiting frame (71), and the output shaft of the motor passes through the limiting frame (71) and is connected to the hollow column (73) for transmission.

2. The self-cleaning flue particle measuring instrument according to claim 1, characterized in that: Both of the measuring gas chambers (1) are fixedly equipped with a gas cleaning mechanism (3) for blowing away dust from the emission light source assembly (5) and the sampling and detection assembly (6). The gas cleaning mechanism (3) includes a gas guide pipe (32) fixedly connected to the top of the measuring gas chamber (1). The top of the gas guide pipe (32) is fixedly connected to a compressed air inlet (31) for connecting to an external gas supply device. The bottom of the gas guide pipe (32) is fixedly connected to a nozzle (33). The nozzle (33) is located inside the measuring gas chamber (1) and is located directly above the emission light source assembly (5) and the sampling and detection assembly (6).

3. The self-cleaning flue particle measuring instrument according to claim 1, characterized in that: An opening and closing mechanism (4) for use with a gas cleaning mechanism (3) is fixedly connected to the outside of the measuring gas chamber (1). The opening and closing mechanism (4) includes a base plate (42) fixedly connected to the bottom of the measuring gas chamber (1). A dividing plate (41) is fixedly connected to the top of the base plate (42). A first through hole (43) and a second through hole (44) are provided on the outside of the base plate (42). The first through hole (43) and the second through hole (44) are located on both sides of the dividing plate (41) and do not contact the dividing plate (41).

4. The self-cleaning flue particle measuring instrument according to claim 3, characterized in that: The base plate (42) has two mounting grooves (411) inside. A first baffle (45) and a second baffle (46) are slidably connected inside the two mounting grooves (411). The first baffle (45) fits the size of the first through hole (43), and the second baffle (46) fits the size of the second through hole (44).

5. The self-cleaning flue particle measuring instrument according to claim 4, characterized in that: Both the second baffle (46) and the first baffle (45) are provided with racks (410) on their outer sides. The measuring air chamber (1) is fixedly connected to a mounting box (47). The top of the mounting box (47) is fixedly connected to a drive motor (48). The output shaft of the drive motor (48) is fixedly connected to a gear (49). The racks (410) on the outer sides of the first baffle (45) and the second baffle (46) respectively mesh with the gear (49), and the two racks (410) are symmetrically arranged on both sides of the gear (49).

6. The self-cleaning flue particle measuring instrument according to claim 5, characterized in that: The mounting slot (411) is connected to the mounting box (47), and the two racks (410) and the gear (49) are all located inside the mounting box (47).

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