Automatic monitoring device and monitoring method for atmospheric particulates

Abstract

The invention relates to the technical field of atmospheric particulate monitoring, in particular to an automatic atmospheric particulate monitoring device and method. The collecting mechanism is used for collecting gas; the particle capturing mechanism is arranged on the bottom shell and is used for capturing particles in the gas; the detection mechanism is arranged in the bottom shell and is used for detecting the concentration of particulate matters; the discharging roller group is used for unwinding the filter paper; and the material receiving roller group is arranged in the bottom shell and is used for rolling the filter paper. According to the automatic monitoring device and method for the atmospheric particulates, when passing through the particle capturing device, the filter paper hunches outwards under the action of negative pressure, so that a cavity is formed between the filter paper, and after leaving the particle capturing device, the two pieces of filter paper are rolled together by the material receiving roller set, so that the two pieces of filter paper are attached to each other; the particulate matters in the atmosphere are clamped between the two pieces of filter paper to form a sandwich structure, so that the particulate matters in the atmosphere can be captured to the greatest extent, the loss of the particulate matters is prevented, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric particulate matter monitoring, and in particular to an atmospheric particulate matter automatic monitoring device and a monitoring method. Background Art

[0002] Atmospheric particulate matter is a general term for various solid and liquid particulate matter in the atmosphere. The size (particle diameter) of atmospheric particulate matter is closely related to its properties and is one of the main characteristics considered in the sampling and control technology of atmospheric particulate pollutants. The β-ray absorption method is a method that can automatically and continuously detect the mass concentration of particulate matter in the atmosphere.

[0003] In the actual monitoring process, the atmosphere will diffuse after entering the detection room through the pipeline, and the particles in the atmosphere will inevitably adhere to the inner wall of the detection room and the detection structure, causing losses and affecting the accuracy of the detection results. In view of this, we propose an automatic monitoring device and monitoring method for atmospheric particulate matter. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide an automatic monitoring device and a monitoring method for atmospheric particulate matter, which solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides, in a first aspect, an automatic monitoring device for atmospheric particulate matter, comprising:

[0006] Bottom shell;

[0007] A collecting mechanism for collecting gas;

[0008] A particle capture mechanism is disposed on the bottom shell and is used to capture particles in the gas;

[0009] A detection mechanism, disposed in the bottom shell, for detecting the concentration of particulate matter;

[0010] Unwinding roller group, used for unwinding filter paper;

[0011] The receiving roller group is arranged in the bottom shell and is used for winding the filter paper;

[0012] The unwinding roller group includes two symmetrically arranged unwinding rollers, the unwinding rollers are rotatably installed in the top shell, and the filter paper is wound around the unwinding rollers;

[0013] The material receiving roller group comprises a winding roller, two horizontal rollers and at least one first guide roller. The winding roller, the horizontal roller and the first guide roller are all rotatably mounted in the bottom shell.

[0014] As a preferred technical solution, the particle capture mechanism includes a hollow outer cylinder, which is in a cylindrical shape and fixedly mounted on the inner wall of the bottom shell, and an inner cylinder is coaxially arranged inside the outer cylinder;

[0015] The inner cylinder is provided with a first chamber for two filter papers to pass through;

[0016] A second chamber is provided between the inner tube and the outer tube, and the first chamber is communicated with the second chamber, and the second chamber is connected to an air pump through a pipeline.

[0017] As a preferred technical solution, the inner cylinder includes two arc plates and two annular sealing plates, the two ends of the arc plates are fixedly connected to the two ends of the two annular sealing plates respectively, and the outer peripheral wall of the annular sealing plate is fixedly connected to the inner peripheral wall of the outer cylinder.

[0018] As a preferred technical solution, the inner cylinder also includes two side sealing plates, which are concave in shape, with the openings of the two concave side sealing plates facing the center of the outer cylinder, and the two ends of the side sealing plates are respectively fixedly connected to the two annular sealing plates, and the two sides of the arc plate are respectively fixedly connected to the two side sealing plates; the central angle of the arc plate is less than one hundred and eighty degrees, and there is a gap between the two arc plates, and the gap is twice the thickness of the filter paper.

[0019] As a preferred technical solution, a first chamber is formed between the two arc-shaped plates and the two side sealing plates, and a second chamber is formed between the two arc-shaped plates, the two side sealing plates, the two annular sealing plates and an outer cylinder;

[0020] The annular sealing plate is provided with a plurality of through holes.

[0021] As a preferred technical solution, the collecting mechanism includes a top shell, the inner wall of the top shell is fixedly connected to the outer peripheral wall of the outer tube, a connecting tube is fixedly connected inside the top shell, the bottom end of the connecting tube is connected to an air outlet pipe, and the bottom end of the air outlet pipe extends into the inner tube.

[0022] As a preferred technical solution, a mounting plate is fixedly connected to the surface of the air outlet pipe, a heating wire is fixedly mounted on the mounting plate, and the heating wire is spirally wound around the outside of the air outlet pipe.

[0023] As a preferred technical solution, the detection mechanism includes a beta-ray emitting module and a beta-ray detecting module which are arranged opposite to each other, and the beta-ray emitting module and the beta-ray detecting module are both fixedly installed in the bottom shell.

[0024] As a preferred technical solution, it also includes two groups of shrinking rollers, two in each group, the two groups of shrinking rollers are rotatably connected to the bottom shell and the top shell respectively, and the shrinking rollers are perpendicular to the unwinding rollers.

[0025] A second aspect of an embodiment of the present invention provides an automatic monitoring method for atmospheric particulate matter, comprising the following steps:

[0026] Step 1: two filter papers are unwound from two unwinding rollers and passed through the first chamber at the same time. After the edges of the two filter papers are aligned, they pass through the concave side sealing plate from top to bottom. After the two filter papers overlap at the bottom of the first chamber, they are rolled up onto the winding roller together.

[0027] Step 2: The air in the second chamber is pumped out by an air pump, so that a pressure difference appears on both sides of the filter paper. The two filter papers are attached to the inner wall of the arc plate under the action of negative pressure, so that a cylindrical chamber is formed between the two filter papers. At the same time, the gas between the two filter papers is pumped out by the air pump, and a negative pressure environment appears in the middle of the filter papers.

[0028] Step 3: Under the action of negative pressure, external air enters between the two filter papers through the connecting tube and the air outlet pipe in sequence;

[0029] Step 4: The heating wire heats the air between the filter papers to accelerate the evaporation of water in the gas;

[0030] Step 5: The particles in the air adhere to the surface of the filter paper, and as the winding roller rotates, the particles are clamped between the two filter papers;

[0031] Step six: the beta ray emission module emits beta rays, which are attenuated after passing through the filter paper, and the beta ray detection module receives the attenuated beta rays.

[0032] By means of the above technical solution, the present invention provides an automatic monitoring device and method for atmospheric particulate matter, which has at least the following beneficial effects:

[0033] The automatic atmospheric particulate matter monitoring device and monitoring method are characterized in that a feeding roller group is provided to synchronously unwind two filter papers at a time. When the filter papers pass through the particle capture device, they are arched outwards under the action of negative pressure, so that a chamber is formed between the filter papers to accommodate the atmosphere drawn into the device. After leaving the particle capture device, the two filter papers are rolled up together by the feeding roller group, so that the two filter papers are attached to each other, and the particulate matter in the atmosphere is clamped between the two filter papers to form a "sandwich" structure, thereby maximally capturing the particulate matter in the atmosphere, preventing the loss of particulate matter, and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0035] Figure 1 It is an isometric view of the overall structure of an embodiment of the present invention;

[0036] Figure 2 A cross-sectional view of a part of the structure in an embodiment of the present invention;

[0037] Figure 3 Schematic diagram of filter paper in an embodiment of the present invention;

[0038] Figure 4 is a schematic diagram of a shrinking roller in an embodiment of the present invention;

[0039] Figure 5 It is a front view of the overall structure of an embodiment of the present invention;

[0040] Figure 6 An exploded view of a collection mechanism and a particle capture mechanism in an embodiment of the present invention;

[0041] Figure 7 It is a top view of the inner cylinder and the outer cylinder in the embodiment of the present invention.

[0042] In the figure: 1. bottom shell; 2. detection mechanism; 21. beta ray emission module; 22. beta ray detection module; 3. material receiving roller group; 31. winding roller; 32. horizontal roller; 33. first guide roller; 4. particle capturing mechanism; 41. outer cylinder; 42. inner cylinder; 421. arc plate; 422. air pump; 423. annular sealing plate; 424. side sealing plate; 425. first chamber; 426. second chamber; 427. through hole; 428. connector; 5. collecting mechanism; 51. top shell; 52. connecting cylinder; 53. collecting cover; 54. air outlet pipe; 55. mounting plate; 56. heating wire; 6. material unwinding roller group; 61. unwinding roller; 62. second guide roller; 7. shrinking roller. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Embodiment 1

[0045] See also Figure 1-Figure 7 , a technical solution provided by an embodiment of the present invention:

[0046] An automatic monitoring device for atmospheric particulate matter comprises a bottom shell 1. A detection mechanism 2 is arranged inside the bottom shell 1 for detecting the concentration of particulate matter.

[0047] Specifically, the detection mechanism 2 includes a β-ray emitting module 21 and a β-ray detecting module 22 which are arranged opposite to each other. The β-ray emitting module 21 and the β-ray detecting module 22 are both fixedly mounted in the bottom shell 1 .

[0048] In this embodiment, a receiving roller group 3 is arranged in the bottom shell 1 for winding the filter paper.

[0049] The receiving roller group 3 includes a winding roller 31, two horizontal rollers 32 and at least one first guide roller 33. The winding roller 31, the horizontal roller 32 and the first guide roller 33 are all rotatably mounted in the bottom shell 1. The winding roller 31 is used to wind up the used filter paper, and the two horizontal rollers 32 allow the filter paper to pass between the β-ray emission module 21 and the β-ray detection module 22 in a horizontal state, so that the detection mechanism 2 can detect the concentration of particulate matter on the filter paper.

[0050] In this embodiment, a particle capturing mechanism 4 is disposed on the top of the bottom shell 1 for capturing particles in the gas.

[0051] The particle capture mechanism 4 includes a hollow outer cylinder 41, and the outer cylinder 41 is fixedly mounted on the inner wall of the bottom shell 1. The outer cylinder 41 is provided with openings at both ends and is in the shape of a circular tube. An inner cylinder 42 is coaxially arranged inside the outer cylinder 41, and the inner cylinder 42 includes two symmetrically arranged arc plates 421, and the central angle of the arc plates 421 is less than one hundred and eighty degrees. There is a gap between the two arc plates 421, and the gap is twice the thickness of the filter paper, which is just enough for two filter papers to pass through. There is a gap between the outer circumferential wall of the arc plate 421 and the inner circumferential wall of the outer cylinder 41 to accommodate gas. The inner cylinder 42 also includes two annular sealing plates 423, and the two ends of the arc plate 421 are fixedly connected to the two ends of the two annular sealing plates 423 respectively, and the outer circumferential wall of the annular sealing plate 423 is fixedly connected to the inner circumferential wall of the outer cylinder 41. The inner cylinder 42 also includes two side sealing plates 424, which are concave in shape. The openings of the two concave side sealing plates 424 face the center of the outer cylinder 41, and the two ends of the side sealing plates 424 are fixedly connected to the two annular sealing plates 423 respectively, and the two sides of the arc plate 421 are fixedly connected to the two side sealing plates 424 respectively.

[0052] A first chamber 425 is formed between the two arc-shaped plates 421 and the two side sealing plates 424 for two filter papers to pass through together. When in use, the two filter papers are aligned and the aligned sides are placed in the side sealing plates 424, and the side sealing plates 424 clamp the edges of the two filter papers.

[0053] The second chamber 426 is surrounded by two arc-shaped plates 421, two side sealing plates 424, two annular sealing plates 423 and an outer tube 41. A plurality of through holes 427 are provided on the annular sealing plate 423 to connect the first chamber 425 with the second chamber 426. A connector 428 is provided on the outer tube 41, and the connector 428 is connected to an air pump 422 through a pipeline, so that the second chamber 426 can be evacuated to a vacuum state by the air pump 422, so that the two filter papers are arched outward under the action of negative pressure, and a cavity is formed between the two filter papers for the gas to be detected to pass through.

[0054] In this embodiment, a collecting mechanism 5 is provided on the outer cylinder 41 for collecting gas.

[0055] The collecting mechanism 5 includes a top shell 51, the inner wall of the top shell 51 is fixedly connected to the outer peripheral wall of the outer tube 41, a connecting tube 52 is fixedly connected inside the top shell 51, the top end of the connecting tube 52 passes through the top shell 51 and is connected to a collecting cover 53 to expand the air intake area, and the bottom end of the connecting tube 52 is connected to an air outlet pipe 54, and the bottom end of the air outlet pipe 54 extends into the inner tube 42.

[0056] A mounting plate 55 is fixedly connected to the surface of the air outlet pipe 54 , and a heating wire 56 is fixedly mounted on the mounting plate 55 . The heating wire 56 is spirally wound around the outside of the air outlet pipe 54 to heat the gas and promote the evaporation of water.

[0057] In this embodiment, a feeding roller group 6 is disposed in the top shell 51 for unwinding the filter paper.

[0058] The unwinding roller group 6 includes two symmetrically arranged unwinding rollers 61 . The unwinding rollers 61 are rotatably installed in the top shell 51 , and filter paper is wound around the unwinding rollers 61 .

[0059] The unloading roller group 6 also includes at least two symmetrical second guide rollers 62 for guiding the filter paper.

[0060] In addition, the automatic monitoring device for atmospheric particulate matter further comprises two groups of shrinking rollers 7, each group of two, and the two groups of shrinking rollers 7 are respectively rotatably connected to the bottom shell 1 and the top shell 51. The shrinking rollers 7 are perpendicular to the unwinding rollers 61, and are used to contact the edge of the filter paper, so that the width of the filter paper is reduced and then the filter paper enters the inner cylinder 42, so that the filter paper can bulge in the inner cylinder 42.

[0061] Embodiment 2

[0062] See also Figure 1-Figure 7 The embodiment of the present invention provides an automatic monitoring method for atmospheric particulate matter, which is implemented by the monitoring device in the first embodiment and includes the following steps:

[0063] Step 1: Pass two filter papers through the first chamber 425 at the same time, align the edges of the two filter papers, and then pass through the concave side sealing plate 424 from top to bottom, and overlap the two filter papers at the bottom of the first chamber 425, and then pass through two horizontal rollers 32 and roll them up onto the winding roller 31 together;

[0064] Step 2: The air in the second chamber 426 is pumped out by the air pump 422, so that a pressure difference appears on both sides of the filter paper. On the one hand, the two filter papers are attached to the inner wall of the arc plate 421 under the action of negative pressure, so that a cylindrical chamber is formed between the two filter papers. On the other hand, the filter paper has a certain air permeability, and the gas between the two filter papers is pumped out by the air pump 422, and a negative pressure environment appears in the middle of the filter paper.

[0065] Step 3: Under the action of negative pressure, the external air passes through the collecting cover 53, the connecting tube 52 and the air outlet pipe 54 in sequence and enters between the two filter papers;

[0066] Step 4: The heating wire 56 heats the air between the filter papers to accelerate the evaporation of water in the gas;

[0067] Step 5: The particles in the air adhere to the surface of the filter paper, and as the winding roller 31 rotates, the particles are clamped between the two filter papers;

[0068] Step six: the β-ray emitting module 21 emits β-rays, which are attenuated after passing through the filter paper, and the β-ray detecting module 22 receives the attenuated β-rays.

[0069] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic monitoring device for atmospheric particulate matter, characterized in that: include: Bottom shell (1); A collecting mechanism (5) for collecting gas; A particle capture mechanism (4) is disposed on the bottom shell (1) and is used to capture particles in the gas; A detection mechanism (2) is arranged in the bottom shell (1) and is used to detect the concentration of particulate matter; A feeding roller group (6) is used for unwinding the filter paper; A material collection roller group (3) is arranged in the bottom shell (1) and is used for collecting the filter paper; The unwinding roller group (6) comprises two symmetrically arranged unwinding rollers (61), wherein the unwinding rollers (61) are rotatably mounted in the top shell (51), and filter paper is wound around the unwinding rollers (61); The material receiving roller group (3) comprises a winding roller (31), two horizontal rollers (32) and at least one first guide roller (33); the winding roller (31), the horizontal roller (32) and the first guide roller (33) are all rotatably mounted in the bottom shell (1).

2. The automatic monitoring device for atmospheric particulate matter according to claim 1 is characterized in that: The particle capture mechanism (4) comprises a hollow outer cylinder (41), the outer cylinder (41) is in a cylindrical shape and is fixedly mounted on the inner wall of the bottom shell (1), and an inner cylinder (42) is coaxially arranged inside the outer cylinder (41); The inner cylinder (42) is provided with a first chamber (425) inside for two filter papers to pass through; A second chamber (426) is provided between the inner tube (42) and the outer tube (41), and the first chamber (425) is communicated with the second chamber (426), and the second chamber (426) is connected to an air pump (422) via a pipeline.

3. The automatic monitoring device for atmospheric particulate matter according to claim 2 is characterized in that: The inner cylinder (42) comprises two arc-shaped plates (421) and two annular sealing plates (423), the two ends of the arc-shaped plates (421) are respectively fixedly connected to the two ends of the two annular sealing plates (423), and the outer peripheral wall of the annular sealing plate (423) is fixedly connected to the inner peripheral wall of the outer cylinder (41).

4. The automatic monitoring device for atmospheric particulate matter according to claim 3 is characterized in that: The inner cylinder (42) further comprises two side sealing plates (424), the side sealing plates (424) being concave in shape, the openings of the two concave side sealing plates (424) facing the center of the outer cylinder (41), the two ends of the side sealing plates (424) being respectively fixedly connected to the two annular sealing plates (423), and the two sides of the arc plate (421) being respectively fixedly connected to the two side sealing plates (424); the central angle of the arc plate (421) is less than one hundred and eighty degrees, and there is a gap between the two arc plates (421), and the gap is twice the thickness of the filter paper.

5. The automatic monitoring device for atmospheric particulate matter according to claim 4 is characterized in that: A first chamber (425) is formed between the two arc-shaped plates (421) and the two side sealing plates (424), and a second chamber (426) is formed between the two arc-shaped plates (421), the two side sealing plates (424), the two annular sealing plates (423) and an outer cylinder (41); The annular sealing plate (423) is provided with a plurality of through holes (427).

6. The automatic monitoring device for atmospheric particulate matter according to claim 1, characterized in that: The collecting mechanism (5) comprises a top shell (51), the inner wall of the top shell (51) is fixedly connected to the outer peripheral wall of the outer cylinder (41), a connecting cylinder (52) is fixedly connected inside the top shell (51), the bottom end of the connecting cylinder (52) is connected to an air outlet pipe (54), and the bottom end of the air outlet pipe (54) extends into the inner cylinder (42).

7. The automatic monitoring device for atmospheric particulate matter according to claim 6, characterized in that: A mounting plate (55) is fixedly connected to the surface of the air outlet pipe (54), a heating wire (56) is fixedly mounted on the mounting plate (55), and the heating wire (56) is spirally wound around the outside of the air outlet pipe (54).

8. The automatic monitoring device for atmospheric particulate matter according to claim 1, characterized in that: The detection mechanism (2) comprises a beta ray emission module (21) and a beta ray detection module (22) which are arranged opposite to each other, and the beta ray emission module (21) and the beta ray detection module (22) are both fixedly mounted in the bottom shell (1).

9. The automatic monitoring device for atmospheric particulate matter according to claim 1, characterized in that: It also comprises two groups of shrinking rollers (7), each group having two, the two groups of shrinking rollers (7) being rotatably connected to the bottom shell (1) and the top shell (51) respectively, and the shrinking rollers (7) are perpendicular to the unwinding rollers (61).

10. An automated monitoring method for atmospheric particulate matter, characterized in that: The following steps are involved: Step 1: two sheets of filter paper are unwound from two unwinding rollers (61) and simultaneously pass through the first chamber (425); the edges of the two sheets of filter paper are aligned and then pass through the concave side sealing plate (424) from top to bottom; the two sheets of filter paper overlap at the bottom of the first chamber (425) and are then rolled up together onto the winding roller (31); Step 2: The air in the second chamber (426) is pumped out by the air pump (422), so that a pressure difference appears on both sides of the filter paper. The two filter papers are attached to the inner wall of the arc plate (421) under the action of negative pressure, so that a cylindrical chamber is formed between the two filter papers. At the same time, the gas between the two filter papers is pumped out by the air pump (422), and a negative pressure environment appears in the middle of the filter papers. Step 3: Under the action of negative pressure, external air enters between the two filter papers through the connecting tube (52) and the air outlet pipe (54) in sequence; Step 4: The heating wire (56) heats the air between the filter papers to accelerate the evaporation of water in the gas; Step 5, the particles in the air adhere to the surface of the filter paper, and as the winding roller (31) rotates, the particles are clamped between the two filter papers; Step six: the beta ray emission module (21) emits beta rays, which are attenuated after passing through the filter paper, and the beta ray detection module (22) receives the attenuated beta rays.

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