Air particle collection device

Abstract

The utility model discloses an air particle collection device, including a collection box, a flow collector is arranged inside the collection box, the input end of the flow collector is equipped with a connection cover, the upper surface of the connection cover is integrally connected with a connection pipe, the upper end of the connection pipe is sleeved with an air intake mechanism, the air intake mechanism includes a gas collecting funnel sleeved with the connection pipe, the inner wall of the gas collecting funnel is provided with a groove, a grille is placed in the groove, filter paper is laid on the upper surface of the grille, a pressing sleeve is also placed on the upper surface of the grille, a connecting rod is inserted on the pressing sleeve, the upper surface of the connecting rod is fixedly connected with a top cover, and an electric control valve is centrally arranged on the upper surface of the top cover. The present application sets a sealing mechanism on its air inlet, seals the air entry channel through the sealing mechanism before collection, and opens the flow collector to evacuate the inside of the device, thereby preventing the residual air inside the air entry channel from affecting the total amount of air flow, causing errors in calculating the content of air particles.

Description

Technical Field

[0001] The utility model belongs to the field of environmental monitoring, in particular to an air particle collection device. Background Art

[0002] In order to monitor the PM2.5 content in the air, an air particle collection device is usually placed in the area to be inspected to collect inhalable particles in the air by filtering.

[0003] Chinese patent CN105928747B discloses a split air particle collection device, including a sampling bottle, an air inlet pipe, an air extraction pipe, an air extraction pump and an exhaust pipe, wherein the sampling bottle includes a receiving bottle and a plurality of collecting bottles, wherein each collecting bottle includes an open end and a sealed bottom cover, a filter membrane, and an air outlet, and the filter membrane is fixed in the collecting bottle; the air inlet pipe is connected to one end of the receiving bottle, and the other end of the receiving bottle is detachably connected to the open end of any one of the collecting bottles, one end of the air extraction pipe is detachably connected to the air outlet of the collecting bottle, and the sealed bottom cover of the receiving bottle is connected to the open end of the remaining collecting bottles; the other end of the air extraction pipe is connected to the air inlet of the air extraction pump, and the exhaust port of the air extraction pump is connected to the exhaust pipe, and the air extraction pump is used to extract air in the cavity, and the dust sucked into the air passes through the filter membrane and retains the dust on its surface for subsequent analysis.

[0004] Most existing collectors use the filter membrane weighing method, but the gas inside the device before use will affect the overall gas flow during use, which will affect the overall result when calculating the particulate matter content in the air. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] An air particle collection device comprises a collection box, a flow collector is arranged inside the collection box, an input end of the flow collector is equipped with a connection cover, an upper surface of the connection cover is integrally connected with a connection pipe, an upper end of the connection pipe is sleeved with an air intake mechanism, the air intake mechanism comprises an air collecting funnel sleeved with the connection pipe, a groove is provided on the inner wall of the air collecting funnel, a grille is placed in the groove, filter paper is laid on the upper surface of the grille, a pressing sleeve is also placed on the upper surface of the grille, a plurality of through holes are arranged in a surrounding manner at the lower end of the pressing sleeve, a spring is fixedly installed on the upper surface of the through hole, a connecting rod is inserted in the spring, a top cover is fixedly connected to the upper surface of the connecting rod, and an electric control valve is centrally provided on the upper surface of the top cover;

[0008] When the top cover moves downward until it fits against the upper surface of the gas collecting funnel, the flow collector starts to evacuate the inside of the air intake mechanism. After the vacuum is generated, the electronically controlled valve opens and the outside air is drawn in by the flow collector through the filter paper to collect air particles.

[0009] The lower surface of the gas collecting funnel is integrally connected with a butt joint, the bottom of the butt joint is provided with a flare, the inner diameter of the flare is equal to the outer diameter of the butt joint, and the gas collecting funnel is sleeved with the connecting pipe through the butt joint.

[0010] A bracket is fixedly sleeved on the butt pipe, an electromagnet is installed on the upper surface of the bracket, and an iron ring is connected to the lower surface of the connecting rod. When the electromagnet is energized, it attracts the iron ring and pulls the top cover downward to fit the upper surface of the gas collecting funnel.

[0011] The upper end of the connecting rod is integrally connected with a protrusion, and when the connecting rod is plugged into the spring, the protrusion contacts the upper surface of the spring, the upper surface of the connecting rod protrudes from the upper surface of the pressing sleeve, and the lower end of the connecting rod extends downward through the through hole on the pressing sleeve.

[0012] A pressing ring is integrally connected to the upper end of the inner surface of the pressing sleeve. The height of the pressing ring is equal to the depth of the groove opened on the inner wall of the gas collecting funnel. A gap is provided between the pressing sleeve and the pressing ring. When the pressing sleeve is clamped on the gas collecting funnel through the gap, the lower surface of the pressing ring is pressed on the filter paper. A flange is provided at the lower end of the outer surface of the pressing sleeve, and a through hole for the connecting rod to pass through is provided on the flange.

[0013] Mounting frames are arranged on both sides of the flow collector inside the collection box. The mounting frames are higher than the flow collector. A support plate is sleeved on the mounting frames. A hole for the connecting pipe to pass through is opened in the center of the upper surface of the support plate.

[0014] A display screen is installed on the upper surface of the collection box, and a signal is connected between the display screen and the flow collector.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] (1) The present application is based on the prior art of using a filter membrane weighing method to capture total suspended particulate matter or inhalable particulate matter in the ambient atmosphere. Therefore, a sealing mechanism is provided on the air inlet. Before collection, the air inlet channel is sealed by the sealing mechanism, and the flow collector is turned on to evacuate the inside of the device, thereby preventing the air from entering the channel. The residual air inside affects the total amount of air flow, causing errors in calculating the air particulate matter content.

[0017] (2) Considering that the air inlet port cannot be opened due to pressure after vacuum, the present application is provided with an electric control valve. When the inside of the pipeline is vacuumed, the electric control valve opens to allow outside air to enter the channel. Filter paper is provided in the channel to filter impurities in the air and a flow collector calculates the amount of air entering.

[0018] (3) In order to achieve vacuum extraction, the present application is provided with a top cover and an air collecting funnel. When the top cover is fitted with the air collecting funnel, the entire air entering the channel is sealed. Starting the flow collector can discharge the air in the channel. The movement of the top cover is achieved by magnetic attraction in the present application. An iron ring is connected to the bottom of the top cover through a connecting rod. An electromagnet is provided under the iron ring. When the electromagnet is energized, it attracts the iron ring. Since the electromagnet is fixed, the iron ring will cause the top cover to drop, thereby achieving the fit between the top cover and the air collecting funnel.

[0019] (4) Furthermore, in order to allow outside air to quickly enter the device after vacuuming, the present application sets a spring on the connecting rod. After vacuuming, the electromagnet is powered off, and the top cover is only fitted with the gas collecting funnel by the air pressure difference. When the electric control valve is opened, the internal and external pressures are balanced, and the connecting rod moves upward and resets due to the rebound force of the spring, thereby causing the top cover to detach from the fit with the gas collecting funnel, and air enters the device through the gap between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The three-dimensional structure of the acquisition device Figure 1 .

[0021] Figure 2 The three-dimensional structure of the acquisition device Figure 2 .

[0022] Figure 3 This is a cross-sectional view of the collection device.

[0023] Figure 4 This is an exploded diagram of the intake mechanism.

[0024] Figure 5 This is an exploded cross-sectional view of the intake mechanism.

[0025] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0026] 100, collection box; 101, display screen; 102, mounting frame; 102a, support plate; 103, flow collector; 103a, connecting cover; 103b, connecting pipe; 200, air intake mechanism; 201, air collecting funnel; 201a, docking pipe; 202, grille; 203, pressing sleeve; 204, top cover; 204a, connecting rod; 204b, iron ring; 204c, electric control valve; 205, electromagnet; 205a, bracket. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0030] See also Figure 1 1 is an overall structural diagram of the air particle collection device in this embodiment. The collection device in this embodiment includes a collection box 100, a flow collector 103 and a display screen 101, wherein the flow collector 103 is placed inside the collection box 100. The flow collector 103 can realize the extraction of air and the total amount of air passing through the flow collector 103 within a specified time. In order to display the total amount of air in real time, the present application installs a display screen 101 on the upper surface of the collection box 100, and the display screen 101 and the flow collector 103 are connected by signal, and the working result of the flow collector 103 is displayed in real time through the display screen 101. This embodiment mainly adopts the filter membrane weighing method to capture the total suspended particulate matter or inhalable particulate matter in the ambient atmosphere. Therefore, a connecting cover 103a is assembled at the input end of the flow collector 103, and a connecting pipe 103b is integrally connected to the upper surface of the connecting cover 103a, and an air intake fan is sleeved on the upper end of the connecting pipe 103b. Structure 200, the air intake mechanism 200 is provided with filter paper to filter and collect the air entering into the air intake mechanism 200. Furthermore, the collection box 100 is used as the installation point of other components, and there is no relatively stable connection between it and the flow collector 103. Therefore, in order to ensure that the flow collector 103 can be in a relatively stable state in the collection box 100, this embodiment is provided with mounting frames 102 on both sides of the flow collector 103 inside the collection box 100, and the mounting frames 102 are used to constrain the position of the flow collector 103 to a certain extent. At the same time, in order to place the flow collector 103 and install other accessories on the flow collector 103, the height of the mounting frame 102 is designed to be greater than the height of the flow collector 103. At the same time, a support plate 102a is sleeved on the mounting frame 102 to protect its upper end and also to constrain it longitudinally. A hole for the connecting pipe 103b to pass through is opened in the center of the upper surface of the support plate 102a.

[0031] See also Figure 4 and Figure 5FIG. 2 is a structural diagram of the air intake mechanism 200 in this embodiment. The air intake mechanism 200 includes a gas collecting funnel 201 which is sleeved with the connecting pipe 103b. The air intake mechanism 200 is installed on the flow collector 103 when the device is used. Therefore, in order to facilitate the connection between the air intake mechanism 200 and the flow collector 103, in this embodiment, a docking pipe 201a is integrally connected to the lower surface of the air collecting funnel 201. The bottom of the docking pipe 201a is provided with a flared opening, and the inner diameter of the flared opening is equal to the outer diameter of the docking pipe 201a. The air collecting funnel 201 is conveniently connected with the connecting pipe 103b by expanding the bottom of the docking tube 201a. The bucket-shaped structure of the air collecting funnel 201 makes it convenient for the impurities contained in the air to be evenly attached to the filter paper when the air enters the air intake mechanism 200. When the filtered air moves to the bottom of the air collecting funnel 201, it will form a certain compression due to the reduction in the path, thereby accelerating the air flow rate, which is convenient for it to be captured by the sensing element in the flow collector 103 and convenient for calculating the flow rate. Since the gas in the air intake mechanism 200 flows faster, in order to ensure that the filter paper is laid flat and will not be affected by the airflow and cause folding, the present embodiment is equipped with a grille 202 on the air collecting funnel 201. The filter paper is laid on the upper surface of the grille 202, and the grille 202 provides support for the filter paper. Furthermore, in order to ensure that the grille 202 remains stable during installation, a groove is opened on the inner wall of the air collecting funnel 201 to facilitate the grille 202 to be embedded in the groove to form a whole with the air collecting funnel 201. Further, in order to prevent the filter paper from being driven by the airflow, the present embodiment has a grille 202 on the grille 202. A pressure sleeve 203 is also placed on the surface, and the edge of the filter paper is pressed by the pressure sleeve 203. A movable connecting rod 204a is provided on the pressure sleeve 203, and a top cover 204 is fixedly connected to the upper surface of the connecting rod 204a. When the top cover 204 moves downward until it fits with the upper surface of the gas collecting funnel 201, the flow collector 103 starts to evacuate the inside of the air intake mechanism 200. After the vacuum, the electronically controlled valve 204c opens the outside air and the air is extracted by the flow collector 103 through the filter paper to collect air particles.

[0032] See also Figure 3This is an assembly diagram of the air intake mechanism 200 and the flow collector 103 in this embodiment. This embodiment is based on the filter membrane weighing method adopted in the prior art. Therefore, the total gas flow rate is an important data for calculating the particulate matter content in the air. The air present in the air intake mechanism 200 also contains particulate matter but cannot be filtered by the filter paper. When the flow collector 103 is started, the air in the air intake mechanism 200 will also pass through to form flow data. Therefore, in this embodiment, the interior of the device is evacuated before collection, and the top cover 204 is pressed down to fit with the upper surface of the gas collecting funnel 201 so that the port of the air intake mechanism 200 is sealed. The flow collector 103 is started to extract the air in the air intake mechanism 200. After it is stable, the value is read using the display screen 101 or reset to zero. After the vacuum, the top cover 204 is attached to the upper surface of the gas collecting funnel 201 due to the pressure difference, and the air intake mechanism 200 is in a sealed state. The flow collector 103 cannot extract air while continuing to work. Therefore, this application An electric control valve 204c is centrally mounted on the upper surface of the top cover 204. Opening the electric control valve 204c facilitates air entry. Furthermore, the amount of air entering by relying solely on the electric control valve 204c is small. In order to expand the air entry channel, the present application provides a plurality of through holes in a circumferential manner at the lower end of the pressing sleeve 203. A spring is fixedly mounted on the upper surface of the through hole. A protrusion is integrally connected to the upper end of the connecting rod 204a. When the connecting rod 204a is plugged into the spring, the protrusion contacts the upper surface of the spring. After the electric control valve 204c is opened to balance the internal and external pressures of the intake mechanism 200, the connecting rod 204a pushes the top cover 204 upward under the rebound force of the spring, thereby allowing air to enter from between the top cover 204 and the pressing sleeve 203. At the same time, in order to ensure that there is enough gap between the top cover 204 and the pressing sleeve 203 for air to enter, the upper surface of the connecting rod 204a protrudes from the upper surface of the pressing sleeve 203, thereby expanding the gap between the top cover 204 and the pressing sleeve 203.

[0033] See also Figure 3 , Figure 4 and Figure 5 It is inconvenient to manually press the top cover 204 down until it fits with the upper surface of the gas collecting funnel 201. Therefore, the present application extends the lower end of the connecting rod 204a downward through the through hole on the pressing sleeve 203, and connects an iron ring 204b to the lower surface of the connecting rod 204a, and a bracket 205a is fixedly sleeved on the docking tube 201a. An electromagnet 205 is installed on the upper surface of the bracket 205a. When the electromagnet 205 is energized, it attracts the iron ring 204b to pull the top cover 204 downward to fit with the upper surface of the gas collecting funnel 201. When the electromagnet 205 is powered off, it has no attraction to the iron ring 204b and will not affect the connecting rod 204a from pushing the top cover 204 upward through the rebound force of the spring.

[0034] See also Figure 5In order to better ensure the flatness of the filter paper and facilitate the installation of the connecting rod 204a, a pressure ring is integrally connected to the upper end of the inner surface of the pressing sleeve 203 in this embodiment. The height of the pressure ring is equal to the depth of the groove opened on the inner wall of the gas collecting funnel 201. A gap is provided between the pressing sleeve 203 and the pressure ring. When the pressing sleeve 203 is connected to the gas collecting funnel 201 through the gap, the lower surface of the pressure ring is pressed on the filter paper. A flange is provided at the lower end of the outer surface of the pressing sleeve 203, and a through hole for the connecting rod 204a to pass through is provided on the flange.

[0035] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. An air particle collection device, comprising a collection box (100), a flow collector (103) is arranged inside the collection box (100), an input end of the flow collector (103) is equipped with a connection cover (103a), an upper surface of the connection cover (103a) is integrally connected with a connection pipe (103b), and an upper end of the connection pipe (103b) is sleeved with an air intake mechanism (200), Features: The air intake mechanism (200) comprises an air collecting funnel (201) sleeved with the connecting pipe (103b), the inner wall of the air collecting funnel (201) is provided with a groove, a grille (202) is placed in the groove, the upper surface of the grille (202) is covered with filter paper, a pressing sleeve (203) is also placed on the upper surface of the grille (202), a plurality of through holes are provided in a surrounding manner at the lower end of the pressing sleeve (203), a spring is fixedly installed on the upper surface of the through hole, a connecting rod (204a) is inserted in the spring, a top cover (204) is fixedly connected to the upper surface of the connecting rod (204a), and an electric control valve (204c) is centrally mounted on the upper surface of the top cover (204); When the top cover (204) moves downward until it is in contact with the upper surface of the air collecting funnel (201), the flow collector (103) starts to evacuate the interior of the air intake mechanism (200). After the evacuation, the electrically controlled valve (204c) opens the outside air and the air is drawn by the flow collector (103) through the filter paper to collect air particles.

2. The air particle collection device according to claim 1, characterized in that: The lower surface of the gas collecting funnel (201) is integrally connected with a butt joint (201a), and the bottom of the butt joint (201a) is provided with a flared opening, the inner diameter of which is equal to the outer diameter of the butt joint (201a), and the gas collecting funnel (201) is sleeved with the connecting pipe (103b) via the butt joint (201a).

3. The air particle collection device according to claim 2, characterized in that: A bracket (205a) is fixedly sleeved on the butt-jointed tube (201a), an electromagnet (205) is installed on the upper surface of the bracket (205a), an iron ring (204b) is connected to the lower surface of the connecting rod (204a), and when the electromagnet (205) is energized, the iron ring (204b) is attracted and pulled to move the top cover (204) downward until it fits the upper surface of the gas collecting funnel (201).

4. The air particle collection device according to claim 3, characterized in that: The upper end of the connecting rod (204a) is integrally connected with a protrusion, and when the connecting rod (204a) is plugged into the spring, the protrusion contacts the upper surface of the spring, the upper surface of the connecting rod (204a) protrudes from the upper surface of the pressing sleeve (203), and the lower end of the connecting rod (204a) passes through the through hole on the pressing sleeve (203) and extends downward.

5. The air particle collection device according to claim 1, characterized in that: A pressing ring is integrally connected to the upper end of the inner surface of the pressing sleeve (203), and the height of the pressing ring is equal to the depth of the groove opened on the inner wall of the gas collecting funnel (201). A gap is provided between the pressing sleeve (203) and the pressing ring. When the pressing sleeve (203) is clamped on the gas collecting funnel (201) through the gap, the lower surface of the pressing ring is pressed on the filter paper. A flange is provided at the lower end of the outer surface of the pressing sleeve (203), and a through hole for the connecting rod (204a) to pass through is provided on the flange.

6. The air particle collection device according to claim 1, characterized in that: A mounting frame (102) is provided inside the collection box (100) on both sides of the flow collector (103); the mounting frame (102) is higher than the flow collector (103); a support plate (102a) is sleeved on the mounting frame (102); a hole for the connection pipe (103b) to pass through is provided in the center of the upper surface of the support plate (102a).

7. The air particle collection device according to claim 1, characterized in that: A display screen (101) is installed on the upper surface of the collection box (100), and a signal connection is established between the display screen (101) and the flow collector (103).

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