Automatic calibration device for screen-free dust meter

Abstract

The utility model relates to the technical field of dust meter calibration, and discloses an automatic calibration device for a screen-free dust meter, which comprises an operation table, a mounting hole is formed in the upper surface of the operation table, a dust simulation cylinder is fixedly connected to the inner wall of the mounting hole, and a dust conveying pipe is fixedly mounted on the upper surface of the dust simulation cylinder. A calibrator is fixedly arranged on the surface of the operation table, the end, away from the dust simulation cylinder, of the dust conveying pipe is fixedly connected with the output end of the calibrator, and the inner wall of the dust simulation cylinder is fixedly connected with an annular supporting plate. According to the utility model, the wind scooper and the wind guide pipe are arranged in the dust simulation cylinder, and after test dust is input into the dust simulation cylinder, the circulating air pump can be utilized to supply air to the wind guide pipe, so that the plurality of jet heads on the surface of the wind guide pipe are utilized to jet air; therefore, the dust uniformly floats at each position of the dust simulation cylinder, and the calibration work of the dust meter is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of dust meter calibration, and more specifically to an automatic calibration device for a screenless dust meter. Background Art

[0002] Dust monitor calibration methods primarily include benchmark calibration and comparison verification. The benchmark calibration method uses filter membrane weighing to calibrate the dust monitor. This method is performed in a standard particle calibration chamber. The instrument to be calibrated and a standard filter membrane dust sampler are simultaneously activated, ensuring that both are sampling at the same time. The mass concentration of the dust particles collected by the instrument is determined by weighing, and this concentration is used as the calibration standard.

[0003] For example, a calibration device for a dust concentration detector, published as Publication No. CN219608701U, includes a test chamber, a mounting bracket, and a dust generator. The test chamber is fixed to the upper side of the mounting bracket, and the dust generator is fixed to the front side of the test chamber. This device allows for quick and convenient assembly and disassembly of dust concentration detectors, facilitating the continuous calibration of multiple dust concentration detectors.

[0004] The dust meter calibration device proposed in the aforementioned patent document suffers from a practical problem in that it lacks a collection mechanism within the dust test environment container, making it difficult to centrally collect waste dust after use, and thus inconvenient for dust replacement, maintenance, and cleaning. Therefore, improvements are needed to address these issues. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automatic calibration device for a screenless dust meter, which has the advantages of convenient dust cleaning, etc., to solve the problems existing in the above-mentioned background technology.

[0006] The utility model provides the following technical solution: an automatic calibration device for a screenless dust monitor, comprising an operating table, an upper surface of the operating table having a mounting hole, an inner wall of the mounting hole being fixedly connected to a dust simulation cylinder, an upper surface of the dust simulation cylinder being fixedly mounted with a dust conveying pipe, a calibrator being fixedly provided on the surface of the operating table, an end of the dust conveying pipe away from the dust simulation cylinder being fixedly connected to an output end of the calibrator;

[0007] The inner wall of the dust simulation cylinder is fixedly connected to an annular support plate, the upper surface of the annular support plate is fixedly connected to an air guide cover, the inner wall of the dust simulation cylinder is fixedly connected to a support rod, the upper surface of the support rod is fixedly connected to an air guide pipe, and the surface of the air guide pipe is fixedly provided with a plurality of nozzles;

[0008] A circulating air pump is fixedly connected to the back of the dust simulation cylinder, the output end of the circulating air pump extends to the interior of the dust simulation cylinder and is fixedly connected to an air supply pipe, the end of the air supply pipe away from the circulating air pump is fixedly connected to the input end of the air guide pipe, the input end of the circulating air pump is fixedly connected to a circulating air inlet pipe, and the end of the circulating air inlet pipe away from the circulating air pump extends upward to the interior of the dust simulation cylinder.

[0009] Furthermore, a plurality of circulating air inlet holes are provided on the upper surface of the annular support plate, and the plurality of circulating air inlet holes are evenly distributed on the surface of the annular support plate in an annular array.

[0010] Furthermore, the air guide pipe is located inside the air guide cover, and the plurality of air jet heads are evenly distributed up and down on the surface of the air guide pipe.

[0011] Furthermore, the inner top wall of the dust simulation cylinder is fixedly connected to two fixing rods, and the bottom ends of the two fixing rods are fixedly connected to arc-shaped baffles, which are located directly below the port of the dust conveying pipe.

[0012] Furthermore, a dust collection box is fixedly installed on the lower surface of the dust simulation cylinder by bolts, and two guide holes symmetrically positioned with each other are opened on the lower surface of the dust collection box. The inner wall of the guide hole is slidably connected with an L-shaped movable plate, and the top ends of the two L-shaped movable plates extend to the interior of the dust collection box and are fixedly connected with a collection bottom plate.

[0013] Furthermore, the size of the collecting base plate matches the dust collection box, and the collecting base plate is slidably connected to the inner wall of the dust collection box. The upper surface of the L-shaped movable plate is fixedly connected with a positioning block, and a threaded hole is provided on the surface of the positioning block. The inner wall of the threaded hole is threadedly connected to a limiting bolt. A positioning groove is provided on the side of the dust collection box, and the position of the positioning groove corresponds to the limiting bolt, and the size of the positioning groove matches the limiting bolt.

[0014] Furthermore, a cleaning port is provided at the bottom end of the dust simulation cylinder, the position of the dust collecting box corresponds to the cleaning port, and the size of the collecting bottom plate matches the cleaning port.

[0015] Furthermore, two placement racks are fixedly connected to the upper surface of the operating table. The two placement racks are symmetrically distributed on the left and right sides of the dust simulation cylinder. The placement racks are used to limit the dust monitor.

[0016] Furthermore, a plurality of sleeve connectors are fixedly embedded on the surface of the dust simulation tube, and the sleeve connectors are used to connect the detection hose of the dust monitor.

[0017] The technical effects and advantages of this utility model are:

[0018] 1. The utility model provides an air guide cover and an air guide duct inside the dust simulation tube. After the test dust is input into the dust simulation tube, a circulating air pump can be used to supply air to the air guide duct, so that a plurality of nozzles on the surface of the air guide duct are used to eject air, so that the dust floats evenly at various positions of the dust simulation tube, which is beneficial to the calibration of the dust meter.

[0019] 2. The utility model has a cleaning port at the bottom of the dust simulation cylinder, and a dust collection box is installed below the cleaning port. The dust can be collected by using the collection bottom plate inside the dust collection box. When the dust collection box is disassembled, the L-shaped movable plate can be used to drive the collection bottom plate to move downward, and then the dust on the surface of the collection bottom plate can be brought into the dust collection box, which is convenient for the staff to replace and clean the dust in the dust simulation cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0021] Figure 2 This is a side view of the structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the front cross-section structure of the dust simulation tube of the utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the dust simulation tube of the utility model;

[0024] Figure 5 for Figure 3 Enlarged structural diagram at point A in the middle.

[0025] The accompanying drawings are marked as follows: 1. operating table; 2. dust simulation cylinder; 3. dust conveying pipe; 4. calibrator; 5. annular support plate; 6. air guide cover; 7. support rod; 8. air guide pipe; 9. nozzle; 10. circulating air pump; 11. air supply pipe; 12. circulating air inlet pipe; 13. circulating air inlet hole; 14. arc-shaped baffle; 15. dust collection box; 16. L-shaped movable plate; 17. collecting bottom plate; 18. positioning block; 19. limiting bolt; 20. cleaning port; 21. placement rack; 22. sleeve connector. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The automatic calibration device of a screenless dust monitor involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Reference Figure 1-5 The utility model provides an automatic calibration device for a screenless dust meter, comprising an operating table 1, an upper surface of which is provided with a mounting hole, an inner wall of the mounting hole being fixedly connected to a dust simulation cylinder 2, and an upper surface of the dust simulation cylinder 2 being fixedly provided with a dust conveying pipe 3.

[0028] A dust collecting box 15 is fixed to the lower surface of the dust simulation cylinder 2 by bolts. Two guide through holes symmetrically positioned with each other are opened on the lower surface of the dust collecting box 15. The inner wall of the guide through hole is slidably connected with an L-shaped movable plate 16. The top ends of the two L-shaped movable plates 16 extend to the interior of the dust collecting box 15 and are fixedly connected with a collection bottom plate 17.

[0029] The size of the collecting base plate 17 matches the dust collecting box 15, and the collecting base plate 17 is slidingly connected to the inner wall of the dust collecting box 15. The upper surface of the L-shaped movable plate 16 is fixedly connected with a positioning block 18. A threaded hole is provided on the surface of the positioning block 18, and the inner wall of the threaded hole is threadedly connected to a limiting bolt 19. A positioning groove is provided on the side of the dust collecting box 15. The position of the positioning groove corresponds to the limiting bolt 19, and the size of the positioning groove matches the limiting bolt 19.

[0030] A cleaning port 20 is provided at the bottom end of the dust simulation cylinder 2 . The position of the dust collecting box 15 corresponds to the cleaning port 20 , and the size of the collecting bottom plate 17 matches the cleaning port 20 .

[0031] It is worth noting that by opening a cleaning port 20 at the bottom of the dust simulation cylinder 2 and installing a dust collection box 15 below the cleaning port 20, during normal use, the height of the collection base plate 17 is kept flush with the cleaning port 20, which can ensure that dust will not fall into the dust collection box 15. When cleaning the dust after the test is completed, first remove the limiting bolt 19 on the surface of the positioning block 18 from the positioning groove on the side of the dust collection box 15, and then use the L-shaped movable plate 16 to drive the collection base plate 17 to move downward, and then bring the dust on the surface of the collection base plate 17 into the dust collection box 15, and then remove the dust collection box 15 from the bottom of the dust simulation cylinder 2, so that the staff can replace and clean the dust in the dust simulation cylinder 2 conveniently.

[0032] Two fixing rods are fixedly connected to the inner top wall of the dust simulation cylinder 2 , and the bottom ends of the two fixing rods are fixedly connected to an arc-shaped baffle 14 , which is located just below the port of the dust conveying pipe 3 .

[0033] Through the above technical solution, the arc baffle 14 can be used to guide the dust output from the dust conveying pipe 3, and during the test calibration process, the arc baffle 14 can be used to block the port of the dust conveying pipe 3, and the arc-shaped concave surface at the bottom of the arc baffle 14 can be used to block and guide the air and dust, thereby reflecting the air and dust.

[0034] A calibrator 4 is fixedly installed on the surface of the operating table 1, and the end of the dust conveying pipe 3 away from the dust simulation cylinder 2 is fixedly connected to the output end of the calibrator 4. When the dust meter is calibrated and tested, the test dust is first poured into the calibrator 4, the relevant parameters are set, and the calibrator 4 is started. Then, the test dust is driven into the dust simulation cylinder 2 through the dust conveying pipe 3 using a conveying device, so as to facilitate the subsequent calibration test of the dust meter.

[0035] Two placement racks 21 are fixedly connected to the upper surface of the operating table 1. The two placement racks 21 are symmetrically distributed on the left and right sides of the dust simulation tube 2. The placement racks 21 are used to limit the dust monitor. Several sleeve connectors 22 are fixedly embedded on the surface of the dust simulation tube 2. The sleeve connector 22 is used to connect the detection hose of the dust monitor. It should be noted that the port of the sleeve connector 22 is threadedly connected with a sealing cover.

[0036] Through the above technical solution, the inner wall of the dust simulation cylinder 2 is fixedly connected with an annular support plate 5, and a plurality of circulating air inlet holes 13 are opened on the upper surface of the annular support plate 5. The plurality of circulating air inlet holes 13 are evenly distributed in an annular array on the surface of the annular support plate 5, and the upper surface of the annular support plate 5 is fixedly connected with an air guide cover 6. The inner wall of the dust simulation cylinder 2 is fixedly connected with a support rod 7, and the upper surface of the support rod 7 is fixedly connected with an air guide duct 8. The surface of the air guide duct 8 is fixedly provided with a plurality of nozzles 9. The air guide duct 8 is located inside the air guide cover 6, and the plurality of nozzles 9 are evenly distributed on the surface of the air guide duct 8 up and down.

[0037] Through the above technical solution, a circulating air pump 10 is fixedly connected to the back of the dust simulation cylinder 2, the output end of the circulating air pump 10 extends to the interior of the dust simulation cylinder 2, and is fixedly connected to an air supply pipe 11, and the end of the air supply pipe 11 away from the circulating air pump 10 is fixedly connected to the input end of the air guide pipe 8, and the input end of the circulating air pump 10 is fixedly connected to a circulating air inlet pipe 12, and the end of the circulating air inlet pipe 12 away from the circulating air pump 10 extends upward to the interior of the dust simulation cylinder 2.

[0038] Through the above technical solution, the dust floats upward in the air ejected from the nozzle 9, and under the action of the air guide hood 6, the dust flows up and down inside the dust simulation tube 2, and the air is transported to the outside of the air guide hood 6 through the circulating air inlet hole 13 on the surface of the annular support plate 5, and then the air is recovered to the circulating air pump 10 by the circulating air inlet pipe 12, thereby realizing the air circulation inside the dust simulation tube 2, which is conducive to the environmental testing of dust inside the dust simulation tube 2.

[0039] It is worth noting that, by arranging an air guide hood 6 and an air guide duct 8 inside the dust simulation tube 2, after the test dust is input into the dust simulation tube 2 by using the calibrator 4, the dust meter is connected to the sleeve connector 22 of the dust simulation tube 2 through the test hose, and then the circulating air pump 10 and the air supply pipe 11 are used to supply air to the inside of the air guide duct 8, and then several nozzles 9 on the surface of the air guide duct 8 are used to eject air, so that the dust floats evenly at various positions of the dust simulation tube 2, which is beneficial to the calibration of the dust meter.

[0040] Finally, it should be noted that the drawings of the disclosed embodiments of the present invention only involve structures related to the disclosed embodiments. The above is only a preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic calibration device for a screenless dust monitor, comprising an operating table (1), characterized in that: The upper surface of the operating table (1) is provided with a mounting hole, the inner wall of the mounting hole is fixedly connected to a dust simulation cylinder (2), the upper surface of the dust simulation cylinder (2) is fixedly mounted with a dust conveying pipe (3), the surface of the operating table (1) is fixedly provided with a calibrator (4), and the end of the dust conveying pipe (3) away from the dust simulation cylinder (2) is fixedly connected to the output end of the calibrator (4); The inner wall of the dust simulation cylinder (2) is fixedly connected to an annular support plate (5), the upper surface of the annular support plate (5) is fixedly connected to an air guide cover (6), the inner wall of the dust simulation cylinder (2) is fixedly connected to a support rod (7), the upper surface of the support rod (7) is fixedly connected to an air guide pipe (8), and a plurality of nozzles (9) are fixedly provided on the surface of the air guide pipe (8); The back of the dust simulation cylinder (2) is fixedly connected to a circulating air pump (10), the output end of the circulating air pump (10) extends to the interior of the dust simulation cylinder (2), and is fixedly connected to an air supply pipe (11), the end of the air supply pipe (11) away from the circulating air pump (10) is fixedly connected to the input end of the air guide pipe (8), the input end of the circulating air pump (10) is fixedly connected to a circulating air inlet pipe (12), and the end of the circulating air inlet pipe (12) away from the circulating air pump (10) extends upward to the interior of the dust simulation cylinder (2).

2. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: The upper surface of the annular support plate (5) is provided with a plurality of circulating air inlet holes (13), and the plurality of circulating air inlet holes (13) are evenly distributed on the surface of the annular support plate (5) in an annular array.

3. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: The air guide pipe (8) is located inside the air guide cover (6), and a plurality of the air jet heads (9) are evenly distributed on the surface of the air guide pipe (8) up and down.

4. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: Two fixing rods are fixedly connected to the inner top wall of the dust simulation cylinder (2), and the bottom ends of the two fixing rods are fixedly connected to arc-shaped baffles (14), and the arc-shaped baffles (14) are located directly below the port of the dust conveying pipe (3).

5. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: A dust collecting box (15) is fixedly mounted on the lower surface of the dust simulation cylinder (2) by means of bolts. Two guide through holes symmetrically positioned with respect to each other are provided on the lower surface of the dust collecting box (15). The inner walls of the guide through holes are slidably connected to an L-shaped movable plate (16). The top ends of the two L-shaped movable plates (16) extend to the interior of the dust collecting box (15) and are fixedly connected to a collecting bottom plate (17).

6. The automatic calibration device for a screenless dust monitor according to claim 5, characterized in that: The size of the collecting base plate (17) matches the dust collecting box (15), and the collecting base plate (17) is slidably connected to the inner wall of the dust collecting box (15). The upper surface of the L-shaped movable plate (16) is fixedly connected with a positioning block (18). A threaded hole is provided on the surface of the positioning block (18), and the inner wall of the threaded hole is threadedly connected to a limiting bolt (19). A positioning groove is provided on the side of the dust collecting box (15), and the position of the positioning groove corresponds to the limiting bolt (19), and the size of the positioning groove matches the limiting bolt (19).

7. The automatic calibration device for a screenless dust monitor according to claim 6, characterized in that: A cleaning port (20) is provided at the bottom end of the dust simulation cylinder (2), the position of the dust collection box (15) corresponds to the cleaning port (20), and the size of the collection bottom plate (17) matches the cleaning port (20).

8. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: Two placement racks (21) are fixedly connected to the upper surface of the operating table (1), and the two placement racks (21) are symmetrically distributed on the left and right sides of the dust simulation cylinder (2). The placement racks (21) are used to limit the dust monitor.

9. The automatic calibration device for a screenless dust monitor according to claim 1, characterized in that: A plurality of sleeve connectors (22) are fixedly embedded on the surface of the dust simulation cylinder (2), and the sleeve connectors (22) are used to connect to the detection hose of the dust monitor.

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