Dust meter detection light path adjusting device

Abstract

The utility model belongs to the technical field of dust instruments, and discloses a dust instrument detection light path adjusting device which comprises a dust instrument body, a light source used for emitting detection light, a receiver used for receiving scattered light and a sampling tube used for sampling, and the inlet portion of the sampling tube is provided with a glass slide in a matched mode. A moving groove is formed in the top of the dust meter main body, a lead screw is rotatably mounted at the center position of the moving groove, the lead screw is in threaded connection with a U-shaped frame, sliding columns are symmetrically mounted on the two sides of the opening end of the U-shaped frame, and the two side walls of the exterior of the U-shaped frame make contact with the two side walls of the interior of the moving groove; the dust meter main body is provided with a mounting frame, the mounting frame is shaped like a Chinese character'ao ', the mounting frame is provided with a through hole, two side walls of the outer side of the mounting frame are provided with sliding grooves, the sliding grooves are obliquely formed in the mounting frame, and the highest ends of the sliding grooves are located at one end where the laser is mounted. And the angle of the mounting rack can be adjusted only by rotating the screw rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust monitors, and in particular relates to a light path adjustment device for detecting light of a dust monitor. Background Art

[0002] Laser dust monitor is a dust detection device that uses laser as light source. The instrument adopts the principle of light scattering method and is widely used in disease prevention and control centers, centralized air conditioning and ventilation system detection, air purifier purification efficiency evaluation, mining, metallurgy, power plants, chemical manufacturing, health supervision, environmental protection, online environmental monitoring, etc. The existing dust monitor includes the dust monitor body and laser, but the emission position of the laser cannot be adjusted. The concentration of industrial flue gas in the chimney is different at various parts of the chimney cross section. If it is selected at random, it is likely to cause large errors in the detection.

[0003] For example, the utility model patent with application number 201620052117.9 discloses a dust meter with an optical path adjustment system, including a dust meter body and a laser, an adjustment plate is provided on one side of the dust meter body, one end of the adjustment plate is movably connected to the dust meter body, the other end of the adjustment plate is connected to the dust meter body through an adjustment screw, the laser is mounted on the adjustment plate, and the laser and the adjustment plate are fixed by a fixing clamp. When the utility model is used, the adjustment screw is fine-tuned to lift the adjustment plate and the laser fixed on the adjustment plate. At this time, the emission angle of the laser emitted by the laser changes, and the sensor device on the dust meter body will change its signal amount due to the change of the laser emission angle of the laser. The operator can adjust the optical path according to the actual situation and needs on site to make the signal obtained on the dust meter clearer and the measurement position more accurate, thereby ensuring the accuracy of the measurement, and the structure is simple and exquisite.

[0004] When using this structure, technicians in related fields found that an Allen wrench is needed to adjust the inclination. While the Allen wrench is difficult to twist, using too much or too little force will result in inaccurate adjustment position. Therefore, the structure of the adjustment device needs to be improved. Utility Model Content

[0005] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a device for adjusting the optical path length of a dust monitor detection light.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A dust meter detection light optical path adjustment device, comprising a light source for emitting detection light, a receiver for receiving scattered light and a sampling tube for sampling on the dust meter body, a glass slide being matched with the inlet of the sampling tube, a moving groove being arranged on the top of the dust meter body, a screw rod being rotatably installed at the center of the moving groove, a U-shaped frame being threadedly connected to the screw rod, sliding columns being symmetrically installed on both sides of the opening end of the U-shaped frame, and two side walls outside the U-shaped frame being in contact with two side walls inside the moving groove;

[0008] The dust monitor body is hingedly mounted with a mounting frame, which is in a "concave" shape. The laser is mounted on a protrusion of the mounting frame, and another protrusion of the mounting frame is provided with a through hole corresponding to the output end of the laser. The outer side walls of the mounting frame are provided with slide grooves, which are obliquely arranged on the mounting frame. The highest end of the slide groove is located at the end where the laser is installed, and the slide column is placed in the slide groove.

[0009] It is further defined that a first bearing is installed at the rotational mounting position of the screw rod and the movable groove. Such a design ensures the rotation effect of the screw rod.

[0010] It is further defined that a second bearing is installed at the end of the slide column located in the slide groove. Such a design ensures the movement effect of the slide column in the slide groove.

[0011] It is further defined that the mounting bracket is provided with a dial, and the dust monitor body is fixedly provided with a pointer matching the dial. With such a design, after data is acquired, the optical path can be quickly adjusted by adjusting to a corresponding angle.

[0012] It is further defined that the laser is mounted on the mounting frame in a threaded connection manner. Such a design is quick and convenient to install and is also easy to replace, and the laser is not prone to position changes.

[0013] The beneficial effects of adopting the utility model are:

[0014] With the structural design of the utility model, the angle of the mounting bracket can be adjusted only by rotating the screw rod, thereby achieving the purpose of adjusting the optical path. Compared with the adjustment method using an Allen wrench in the prior art, the adjustment is more convenient and labor-saving, and the self-locking of the thread ensures a stable effect after adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a schematic structural diagram of an embodiment of a light path adjustment device for detecting light of a dust monitor according to the utility model;

[0017] Figure 2It is a schematic diagram of a part of the structure of an embodiment of a light path adjustment device for detecting light of a dust monitor of the utility model;

[0018] Figure 3 It is a partial cross-sectional structural schematic diagram of an embodiment of a light path adjustment device for detecting light of a dust monitor of the utility model;

[0019] The main component symbols are described as follows:

[0020] Dust monitor body 1; laser 2; moving slot 3; screw rod 4; U-shaped frame 5; sliding column 6; mounting frame 7; through hole 8; sliding slot 9; first bearing 10; second bearing 11; dial 12; pointer 13. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, a dust meter detection light optical path adjustment device of the utility model comprises a dust meter main body 1 with a light source for emitting detection light, a receiver for receiving scattered light and a sampling tube for sampling, the inlet of the sampling tube is equipped with a glass slide, a moving groove 3 is provided on the top of the dust meter main body 1, a screw rod 4 is rotatably installed at the center of the moving groove 3, a U-shaped frame 5 is threadedly connected to the screw rod 4, sliding columns 6 are symmetrically installed on both sides of the opening end of the U-shaped frame 5, and the outer side walls of the U-shaped frame 5 are in contact with the inner side walls of the moving groove 3;

[0023] The dust monitor body 1 is hingedly mounted with a mounting frame 7, which is in a "concave" shape. The laser 2 is mounted on a protrusion of the mounting frame 7. The other protrusion of the mounting frame 7 is provided with a through hole 8 corresponding to the output end of the laser 2. The outer side walls of the mounting frame 7 are provided with slide grooves 9, which are obliquely arranged on the mounting frame 7. The highest end of the slide groove 9 is located at one end where the laser 2 is installed, and the slide column 6 is placed in the slide groove 9.

[0024] In this embodiment, when using a dust meter detection light optical path adjustment device, a glass slide is installed at the entrance of the sampling tube, the inclination angle between the mounting frame 7 and the dust meter body 1 is adjusted, the light source is turned on, the detection light passes through the sampling tube and is projected onto the glass slide, the position of the light spot on the glass slide is observed, and the mounting frame 7 is further adjusted according to the position of the light spot on the glass slide, and finally the light spot is moved to the position marked on the glass slide. In this way, the effective optical path length of the detection light in the sampling tube can be set and determined according to the Pythagorean theorem;

[0025] The mounting frame 7 is adjusted by rotating the screw rod 4. The rotation of the screw rod 4 drives the U-shaped frame 5 slidably mounted in the moving groove 3 to move. The movement of the U-shaped frame 5 causes the slide post 6 located in the slide groove 9 to be displaced. The displacement of the slide post 6 cooperates with the inclined slide groove 9 to cause the mounting frame 7 to produce an angular displacement, that is, the angle adjustment is achieved. After the adjustment is completed, because the U-shaped frame 5 and the screw rod 4 are threadedly connected, the U-shaped frame 5 cannot be displaced in the absence of external force, thereby ensuring the stability of the mounting frame 7 after the angle adjustment is completed.

[0026] In summary, the angle adjustment can be completed without using any auxiliary tools, which saves time and effort, and the thread adjustment method has high precision.

[0027] Preferably, a first bearing 10 is installed at the rotational mounting point of the screw rod 4 and the movable groove 3. Such a design ensures the rotation effect of the screw rod 4. In fact, a structure that ensures the rotation effect of the screw rod 4 can also be considered according to specific circumstances.

[0028] Preferably, a second bearing 11 is installed at the end of the slide column 6 located in the slide groove 9. Such a design ensures the movement effect of the slide column 6 in the slide groove 9. In fact, a structure that ensures the movement effect of the slide column 6 in the slide groove 9 can also be considered according to specific circumstances.

[0029] Preferably, the mounting frame 7 is provided with a dial 12, and the dust monitor body 1 is fixedly mounted with a pointer 13 matching the dial 12. With this design, after data acquisition, the optical path can be quickly adjusted by adjusting to the corresponding angle. In fact, the angle determination measures can also be considered according to specific circumstances.

[0030] Preferably, the laser 2 is installed on the mounting bracket 7 by means of a threaded connection. Such a design is quick and convenient for installation and is easy for replacement, and the laser is not prone to position change. In fact, the installation method of the laser 2 can also be considered according to specific circumstances.

[0031] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A dust monitor detection light optical path adjustment device, comprising a dust monitor body (1) having a light source for emitting detection light, a receiver for receiving scattered light, and a sampling tube for sampling, wherein the inlet of the sampling tube is equipped with a glass slide, characterized in that: A movable groove (3) is provided on the top of the dust monitor body (1), a screw rod (4) is rotatably installed at the center of the movable groove (3), the screw rod (4) is threadedly connected to a U-shaped frame (5), sliding columns (6) are symmetrically installed on both sides of the opening end of the U-shaped frame (5), and the outer side walls of the U-shaped frame (5) are in contact with the inner side walls of the movable groove (3); The dust monitor body (1) is hingedly mounted with a mounting frame (7), the mounting frame (7) is in a "concave" shape, the laser (2) is mounted on a protrusion of the mounting frame (7), the other protrusion of the mounting frame (7) is provided with a through hole (8) corresponding to the position of the output end of the laser (2), the outer side walls of the mounting frame (7) are provided with slide grooves (9), the slide grooves (9) are obliquely arranged on the mounting frame (7), the highest end of the slide groove (9) is located at the end where the laser (2) is mounted, and the slide column (6) is placed in the slide groove (9).

2. The optical path adjustment device for detecting light of a dust monitor according to claim 1, characterized in that: A first bearing (10) is installed at the rotational installation position of the screw rod (4) and the movable groove (3).

3. The optical path adjustment device for detecting light of a dust monitor according to claim 2, characterized in that: A second bearing (11) is installed at the end of the slide column (6) located in the slide groove (9).

4. The optical path adjustment device for detecting light of a dust monitor according to claim 3 is characterized in that: The mounting frame (7) is provided with a dial (12), and the dust monitor body (1) is fixedly provided with a pointer (13) matching the dial (12).

5. The optical path adjustment device for detecting light of a dust monitor according to claim 4, characterized in that: The laser (2) is mounted on the mounting frame (7) in a threaded connection manner.

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