KR102600764B1 - Fine dust measuring device having variable position of beta-ray generating module - Google Patents

Abstract

The present invention relates to a fine dust measurement device in which the position of the beta ray generation module is variable. A fine dust measuring device according to a preferred embodiment of the present invention includes a housing 30 having a receiving space on the inside and an introduction portion 35 formed through an upper surface; A beta ray detector 31 located inside the housing 30 and detecting beta rays irradiated through the introduction part 35; and a beta ray generation module 43 that is located outside the housing 30 in the fine dust collection mode and moves to face the introduction portion 35 in the fine dust measurement mode.

Description

Fine dust measuring device having variable position of beta-ray generating module}

The present invention relates to a fine dust measuring device.

Methods for measuring fine dust include beta-ray method, gravimetric method, and light scattering method. The beta ray method radiates beta rays to the upper part of the filter where fine dust is adsorbed and can measure the concentration of fine dust using the detection amount of beta rays irradiated from the bottom of the filter.

The beta radiation method has a separation device installed in the air intake section, so It removes more than 10 particles and sucks air through the set flow to fill the filter. The following dust can be supplied. There are two types of separation devices, such as cyclone type and impactor type, depending on the type of particle separation structure. In the beta radiation method, the size of particles filtered out in the separation device can vary.

The beta radiation method can be applied in the field as a standalone device or in the form of a fusion of the beta radiation method and light scattering method. As a special form, the beta radiation method may be used in a form that links a low-specification (e.g., light scattering) measurement method to a network and has both a measurement function and a function of providing a reference value for correction of low-specification measurement values. .

1. Korean Patent No. 1278289

The purpose of the present invention is to provide a fine dust measurement device that can increase measurement accuracy.

The purpose of the present invention is to provide a fine dust measuring device that is easy to maintain.

A fine dust measuring device according to a preferred embodiment of the present invention includes a housing 30 having a receiving space on the inside and an introduction portion 35 formed through an upper surface; A beta ray detector 31 located inside the housing 30 and detecting beta rays irradiated through the introduction part 35; and a beta ray generation module 43 that is located outside the housing 30 in the fine dust collection mode and moves to face the introduction portion 35 in the fine dust measurement mode.

Here, the fine dust measuring device further includes a lower inlet 400 located above the introduction part 35, and a pressing part 440 protruding downward is provided on the lower surface of the lower inlet 400, The pressing unit 440 may press the upper surface of the film 50 in the fine dust collection mode to bring the film 50 into close contact with the upper surface of the housing 30.

In addition, the lower inlet 400 is spaced apart from the film 50 during the fine dust measurement operation, and the beta ray generation module 43 is positioned between the lower inlet 400 and the film 50 during the fine dust measurement operation. can be located

Additionally, the pressing part 440 is formed in a disk shape, and the inner peripheral surface of the pressing part 440 may be located inside the introduction part 35.

Additionally, the pressing unit 440 may press the film 50 by the elastic force of the spring 330 located at the top of the lower inlet 400.

In addition, the pressing part 440 maintains airtightness between the pressing part 440 and the film 50 so that air passing through the lower inlet 400 and the introduction part 35 flows into the pressing part 440 and the film 50. It is possible to prevent leakage between the films 50.

The present invention prevents contamination of the beta ray generation module and reduces beta ray leakage, thereby increasing the accuracy of measurement and lengthening the period during which the accuracy is maintained.

In the present invention, maintenance work can be very easy through the separation structure of the upper inlet and lower inlet.

Figure 1a is a cross-sectional view of the fine dust measuring device according to a preferred embodiment of the present invention as seen from the front.
Figure 1b is a cross-sectional view from the side of the fine dust measuring device according to a preferred embodiment of the present invention.
Figure 2 is an enlarged view of area a in Figure 1.
Figure 3 is a plan view of the lower inlet of Figure 1.
FIG. 4A is a cross-sectional view viewed from the front to explain the collection operation of the fine dust measuring device of FIG. 1.
Figure 4b is a cross-sectional view viewed from the side to explain the collection operation of the fine dust measuring device of Figure 1.
FIG. 5A is a cross-sectional view viewed from the front to explain the beta-ray source input operation of the fine dust measuring device of FIG. 1.
Figure 5b is a cross-sectional view viewed from the side to explain the beta ray source input operation of the fine dust measuring device of Figure 1.
FIG. 6A is a cross-sectional view viewed from the front for explaining the fine dust measurement operation of the fine dust measuring device of FIG. 1.
FIG. 6B is a cross-sectional view viewed from the side for explaining the fine dust measurement operation of the fine dust measuring device of FIG. 1.
FIGS. 7A to 7E are front and side views for explaining the disassembly process for maintenance and repair of the fine dust measuring device of FIG. 1.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

While describing each drawing, similar reference numerals are used for similar components. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention.

The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains.

Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, a fine dust measuring device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. Below, descriptions of previously known matters are omitted or simplified to clarify the gist of the present invention.

Referring to Figure 1, the fine dust measuring device may include an upper inlet 100, a fixed part 200, a moving part 300, a lower inlet 400, a housing 30, and a beta ray generation module 43. there is.

The upper inlet 100 may include an air passage penetrating upward and downward on the inside. The upper inlet 100 may be cylindrical extending from the top to the bottom. The upper inlet 100 may include a mounting portion 110 protruding from the side. The upper inlet 100 may extend to the inside of the lower inlet 400. The upper inlet 100 may be inserted into and fixed to the fixing part 200. At this time, the lower surface of the mounting part 110 may be mounted on the upper surface of the fixing part 200. A separation device (not shown) is installed at the top of the upper inlet 100 to filter fine dust into a preset particle size.

The fixing part 200 may be hollow and open upward and downward. The inside of the fixing part 200 may be in close contact with the outer surface of the upper inlet 100. The inside of the fixing part 200 may be penetrated by the upper inlet 100. The fixing unit 200 may be fixed to the fixing frame 1000 (see FIG. 4). The fixing frame 1000 may be of any shape as long as it is a medium that can fix the position of the fixing unit 200 regardless of the movement of the moving unit 300.

The fixing unit 200 may include a first fixing part 210 (see FIG. 7A) located in the front and a second fixing part 220 (see FIG. 7A) located in the rear. The first fixing part 210 and the second fixing part 220 are in close contact with each other and can be tightly fixed to each other by a fastening screw P passing through the fastening hole 201. The first fixing part 210 and the second fixing part 220 have a shape that bisects the fixing part 200 into a first side and a second side, and may have a structure that is left and right symmetrical. The upper inlet 100 may be inserted into the cylindrical space formed on the inside by the first fixing part 210 and the second fixing part 220 that are in close contact with each other.

The fixing part 200 may include a first lower extension part 230 extending downward.

The inside of the first lower extension 230 may be spaced apart from the outer surface of the upper inlet 100. A guide hole 231 extending from the top to the bottom may be formed in the first lower extension portion 230.

The moving part 300 may be installed on the fixed part 200 to be able to move up and down.

The moving part 300 may include an inner space penetrated vertically by the upper inlet 100. The moving part 300 may include an upper extension part 320 extending upward from the top of the moving part 300. The inside of the upper extension 320 may be spaced apart from the outer surface of the upper inlet 100. A spring 330 may be inserted between the upper extension 320 and the outer surface of the upper inlet 100. Spring 330 may be a cylindrical compression spring. The lower end of the spring 330 is supported by the surface opposing the lower end of the spring 330 in the moving part 300, and the upper end of the spring 330 is supported by the surface opposing the upper end of the spring 330 in the fixed part 200. Can be supported by surfaces. The spring 330 extends between the upper extension 320 and the outer surface of the upper inlet 100 and between the inner surface of the first lower extension 230 and the outer surface of the upper inlet 100, and is located on the inner side of the upper inlet 100. ) can be accommodated.

The outer surface of the upper extension 320 may be located inside the first lower extension 230. The outer surface of the upper extension part 320 may be in close contact with the inner surface of the first lower extension part 230. The upper extension 320 can move up and down in the space between the inner surface of the first lower extension 230 and the outer surface of the upper inlet 100. At this time, the upper extension 320 may be guided by the inner surface of the first lower extension 230.

The moving part 300 may include a guide rod 310 extending upward from the moving part 300. The guide rod 310 may be inserted into the guide hole 231. The guide rod 310 can move up and down while being guided by the guide hole 231.

The moving part 300 may include a third lower extension part 350 extending downward. The third lower extension 350 may include a fastening hole 351 penetrating from the first side to the second side. The fastener 352 may be inserted into and fixed in the fastener hole 351. The fastening portion 352 may be provided with a close contact portion 352a at one end. The contact portion 352a is in close contact with the outer surface of the lower inlet 400 and can stably fix the lower inlet 400 to the moving unit 300.

The moving part 300 may include a second lower extension part 340 extending downward. The second lower extension 340 may be located inside the third lower extension 350.

The moving unit 300 can move up and down by a separate driving means (not shown). At this time, the lower inlet 400 fixed to the moving part 300 can also move up and down along the moving part 300. When the moving part 300 moves up and down, the moving part 300 moves the guide hole 230 into which the guide rod 310 is inserted and the first lower extension part 230 into which the outer surface of the upper extension part 320 is in close contact. You can be guided by your inner self.

The lower inlet 400 may be detachably fixed to the moving part 300 located below the fixing part 200.

The lower inlet 400 may be provided with a groove-shaped fastening portion 420 (see FIG. 3) in the upper outer region. The second lower extension part 340 may be inserted into the fastening part 420. The second lower extension 340 may be provided with a fastening hole 360 at a position corresponding to the fastening hole 430 of the lower inlet 400. The lower inlet 400 is connected to the second lower extension 340 by a fastening means (not shown) penetrating the fastening hole 360 of the second extension 340 and the fastening hole 430 of the lower inlet 400. Can be detachably fixed to.

The lower end of the upper inlet 100 may be located inside the lower inlet 400. The inner surface of the lower inlet 400 facing the upper inlet 100 may be in close contact with the upper inlet 100. An O-ring 2 may be provided between the inner surface of the lower inlet 400 and the outer surface of the upper inlet 100. An inclined portion 410 may be provided in the inner area of the lower inlet 400 located at the bottom of the upper inlet 100. The inclined portion 410 may have a shape whose radius gradually decreases as it goes downward. The inclined portion 410 may extend to the bottom of the lower inlet 400. The inclined portion 410 may converge air discharged downward through the upper inlet 100 and discharge it toward the introduction portion 35 (see FIG. 5) located below the lower inlet 400. The open area below the lower inlet 400 may face the introduction portion 35. The open area below the lower inlet 400 is formed to have a smaller radius than the introduction part 35, and the open area below the lower inlet 400 may be located inside the introduction part 35.

A pressure portion 440 (see FIG. 2) protruding downward may be provided on the lower surface of the lower inlet 400. The pressing part 440 is formed in a disk shape, and the inner peripheral surface of the pressing part 440 may be located inside the introduction part 35. The pressing unit 440 presses the upper surface of the film 50 (see FIG. 4) with the elastic force of the spring 330 while the fine dust measuring device operates in the fine dust collection mode to press the film 50 into the housing 30. It can be attached closely to the upper surface. The pressing unit 440 maintains airtightness between the pressing unit 440 and the film 50 so that air passing through the lower inlet 400 and the introduction part 35 is compressed into the pressing unit 440 and the film ( 50) and between the upper surface of the film 50 and the housing 30 can be prevented.

While the fine dust measurement device operates in the fine dust measurement mode, the lower inlet 400 is spaced apart from the film 50, and the beta ray generation module 43 can be located between the lower inlet 400 and the film 50. there is.

The film 50 may be positioned between the lower part of the lower inlet 400 and the housing 30. The film 50 may be transported from the first side to the second side while sliding by the first roller 10 located on the first side of the housing and the second roller 20 located on the second side. The film 50 extends from the first side to the second side, and the film 50 may cover the entire top of the introduction portion 35.

The housing 30 may have a receiving space on the inside. The housing 30 may include an introduction portion 35 that penetrates the upper surface vertically.

The inner receiving space of the housing 30 may be provided with a beta ray detector 31 that detects beta rays irradiated through the introduction part 35.

An outlet 34 may be provided on one side of the housing 30. The housing 30 may be provided with a flow path 33 through which air can move from the introduction part 35 to the outlet 34.

The trailer actuator 41 may be provided on the outside of the housing 30. A trailer 42 may be mounted on the trailer 41. A beta ray generation module 43 may be mounted on the trailer 42. The beta ray generation module 43 can emit beta rays to the lower part. As the trailer actuator 41 drives the trailer 42 left and right, the beta ray generating module 43 can move between the outside of the housing 30 and the introduction part 35. When the fine dust measurement device operates in the fine dust collection mode, the beta ray generation module 43 is located outside the housing 30, and when the fine dust measurement device operates in the fine dust measurement mode, the beta ray generation module 43 ) may face the introduction portion 35.

As described above, the upper inlet 100 and the lower inlet 400 below the upper inlet 100 are detachably coupled to facilitate maintenance.

Hereinafter, with reference to FIGS. 1 and 4 to 6, the overall operation of the fine dust measuring device having the above structure will be described. To clarify the point, some components of FIG. 1 are omitted or simply shown in FIGS. 4 to 6.

1. Operation in collection mode of fine dust measurement device

Referring to FIG. 4, when in collection mode, the lower inlet 400 may move downward. Additionally, the pressing unit 440 may press the upper surface of the film 50 downward. As a result, the pressing unit 400 and the film 50 can be brought into close contact with each other, and the film 50 and the upper surface of the housing 30 can be brought into close contact with each other. At this time, the film 50 and the housing 30 can be firmly brought into close contact by the elastic force of the spring 330. By making the force required for close contact an elastic force, the driving means for driving the moving part 300 can prevent the pressing part 440 from damaging the film 50 by excessively lowering the moving part 300. It may be possible, and there may be no need to drive the driving means very precisely so that the pressing unit 400 accurately presses the film 50. The lower inlet 400 may move downward by lowering the moving unit 300 on which the lower inlet 400 is fixedly installed. A separate driving means (not shown) may be responsible for the vertical movement of the moving unit 300.

In this state, air may flow from the top to the bottom through the inner space of the upper inlet 100. The air passing through the upper inlet 100 is converged toward the center by the inclined portion 410 of the lower inlet 400, and the converged air passes through the film 50, the introduction part 35, and the flow path 33 in that order. , can be discharged through the outlet 34.

In the collection mode, the beta ray generation module 43 may be located outside the housing 30. As a result, the beta ray generation module 43 can be prevented from being contaminated by fine dust when collecting fine dust. In addition, the occurrence of measurement errors due to contamination of the beta ray generation module 43 can be reduced.

2. Operation of the fine dust measurement device in beta ray source input mode and fine dust measurement mode

Referring to FIG. 5, when the collection mode is completed, the lower inlet 400 may move upward to be spaced apart from the film 50. At this time, the lower inlet 400 can be moved upward by the moving part 300 on which the lower inlet 400 is fixedly installed moves upward.

In addition, the beta ray generating module 43 may be moved from the outside of the housing 30 toward the introduction part 35 between the bottom of the lower inlet 40 and the film 50 to face the introduction part 35. At this time, the trailer actuator 41 can operate the trailer 42 to move the beta ray generation module 43 from the outside of the housing 30 to the introduction part 35. At this time, the lower part of the beta ray generation module 43, where beta rays are emitted, may be spaced apart from the upper surface of the film 50 at a preset interval.

In the state shown in FIG. 5, the beta ray generation module 43 emits beta rays, and the beta ray detector 31 can detect the emitted beta rays that have passed through the film 50 and the introduction portion 35. The beta ray detector 31 can transmit a signal corresponding to the detected beta ray to the outside through a signal line (L).

Alternatively, as shown in FIG. 6 , the fine dust measurement mode may be performed in a state in which the lower part of the lower inlet 400 is lowered to contact the beta ray generation module 43. At this time, the lower surface of the beta ray generation module 43 may be pressed by the pressing part 440 and come into close contact with the upper surface of the film 50. At this time, in a state in which the lower part of the lower inlet 400 is lowered to contact the beta ray generating module 43, the beta ray generating module 43 emits beta rays, which are emitted and pass through the film 50 and the introduction portion 35. The beta ray detector 31 can detect beta rays. In the fine dust measurement mode, the operation shown in FIG. 6 is an optional option that can be omitted or added. In addition, the fine dust measurement mode may be performed in the state of FIG. 5. However, by minimizing the beta rays leaking through the method shown in FIG. 6, the measurement precision of the fine dust measuring device can be greatly increased.

When the fine dust measurement mode is completed, the beta ray generation module 43 may return to the outside of the housing 30, as shown in FIG. 4.

Hereinafter, a disassembly operation for maintenance of the fine dust measuring device will be described with reference to FIGS. 1 and 7A to 7E.

Referring to FIG. 7A, the lower inlet 400 may be moved upward and stopped. At this time, it is preferable that the lower inlet 400 is moved to the uppermost part of the vertical movement section of the lower inlet 400 to facilitate disassembly work.

Referring to FIGS. 7A and 7B , the first fixing part 210 can be separated from the second fixing part 220 after removing the fastening screw P located on the front of the first fixing part 210. At this time, the second fixing part 220 may be fixed to the fixing frame 1000.

Referring to FIG. 7C, while the first fixing part 210 is separated from the second fixing part 220, the upper inlet 100 is pulled upward to separate the upper inlet 100 from the fixing part 200. You can.

Referring to FIGS. 7C and 7D , the lower inlet 400 can be separated from the moving part 300 after removing the fastening means (not shown) on the lower inlet 400 side.

As a result, as shown in FIG. 7E, the upper inlet 100 and lower inlet 400, which are objects of cleaning, can be separated.

The lower inlet 400, which has an inclined portion 410 to easily collect fine dust in the filter, is not easy to clean. And, the inclined portion 410 is an area where fine dust is easily deposited. Therefore, by manufacturing the upper inlet 100 and the lower inlet 400 as separate types and manufacturing the lower inlet 400 at a low depth, cleaning of the lower inlet 400, on which fine dust is easily deposited, is possible. The task can be very easy. Of course, since it is a separate type, the depth of the upper inlet 100 is also reduced, so cleaning of the upper inlet 100 can also be easy. In addition, by assembling the upper inlet 100 to be located inside the lower inlet 400, the air passing through the upper inlet 100 accumulates fine dust in the area where the upper inlet 100 and the lower inlet 400 contact. The problem may not occur.

100: upper inlet
110: holder
200: fixing part
201: fastener
210: first fixing part
220: second fixing part
230: first lower extension
231: Guide ball
300: moving part
310: Guide rod
320: upper extension part
330: spring
340: second lower extension
350: third lower extension
351: Fastener
532: fastening part
352a: Close contact part
360: Fastener
400: lower inlet
410: inclined portion
420: fastening part
430: Fastener
440: compression unit
2: O-ring
10: first roller
20: second roller
30: housing
31: Beta ray detector
33: Euro
34: outlet
35: Introduction
L: signal line
41: trailer actuator
42: trailer
43: Beta ray generation module
1000: fixed frame

Claims (6)

Fixed to the fixing frame 1000 and having a fixing part 200;
A moving part 300 installed to be movable up and down at the lower part of the fixing part 200;
a lower inlet 400 that is detachably fixed to the moving part 300 and moves up and down as the moving part 300 moves;
an upper inlet 100 that is inserted and fixed into the fixing part 200 and whose lower end is located inside the lower inlet 400;
A housing 30 located below the lower inlet 400, having a receiving space inside, and including an introduction portion 35 formed through an upper surface;
A beta ray detector 31 located inside the housing 30 and detecting beta rays irradiated through the introduction part 35; and
It includes a beta ray generation module 43 that is located outside the housing 30 in the fine dust collection mode and moves to face the introduction part 35 in the fine dust measurement mode,
The fixing part 200 extends downward and is provided with a first lower extension part 230 whose inner side is spaced apart from the outer surface of the upper inlet 100,
The moving part 300 includes an upper extension part 320 extending upward from the top of the moving part 300,
The upper extension portion 320 has an outer surface in close contact with the inner surface of the first lower extension portion 230 and extends vertically in the space between the inner surface of the first lower extension portion 230 and the outer surface of the upper inlet 100. A fine dust measuring device characterized in that it moves. In clause 1,
A pressing portion 440 protruding downward is provided on the lower surface of the lower inlet 400,
The pressing unit 440 presses the upper surface of the film 50 in fine dust collection mode to bring the film 50 into close contact with the upper surface of the housing 30. According to claim 2,
The lower inlet 400 is spaced apart from the film 50 during a fine dust measurement operation,
A fine dust measuring device, wherein the beta ray generation module 43 is located between the lower inlet 400 and the film 50 during the fine dust measurement operation. According to claim 2,
The pressing portion 440 is formed in a disk shape,
A fine dust measuring device, characterized in that the inner peripheral surface of the pressing part 440 is located inside the introduction part 35. According to claim 2,
The pressing unit 440 is a fine dust measuring device characterized in that the film 50 is pressed by the elastic force of the spring 330 located at the top of the lower inlet 400. According to claim 2,
The pressing part 440 maintains airtightness between the pressing part 440 and the film 50 so that the air passing through the lower inlet 400 and the introduction part 35 is connected to the pressing part 440 and the film ( 50) A fine dust measuring device characterized in that it prevents leakage through the space.

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