An automatic monitoring device for air particulate matter comparison

Abstract

The application discloses an automatic monitoring device for air particulate matter comparison, and relates to the technical field of air detection.The technical scheme is as follows: the device comprises a sampling part which can sample external air; a detection part which can receive the sample collected by the sampling part and perform detection; the sampling part comprises: an air extraction unit which can extract external air; a separation unit which comprises a sampling cutter; a replacement unit which is linked with the separation unit and can replace the filter element of the sampling cutter; and the detection part comprises a detection box which is a constant-temperature and constant-humidity box.The application has the beneficial effect that the sampling unit can directly obtain a sample from the atmosphere, and then the detection part directly performs detection without external transfer of the sample, and sampling and detection are sequentially completed in the device.Compared with the traditional air extraction sampling mode, the device can make the air sample closer to the real situation of the air quality of the surrounding environment, and is more convenient for workers to control the sample amount, is ingenious in design, and has high practicability.

Description

[0001] The present application relates to the technical field of air detection, in particular to an automatic monitoring device for air particulate matter comparison. BACKGROUND

[0002] Air particulate matter refers to solid or liquid particulate matter dispersed in the air. A large amount of such particulate matter falling on plant leaves will affect plant growth and cause staining and corrosion of buildings and clothes. Small-particle particulate matter can also cause or aggravate respiratory diseases in residents. In order to monitor the content of various pollutants in the atmosphere, active sampling of the atmosphere is required, and then the collected samples are detected.

[0003] As atmospheric sampling work, an atmospheric sampler is usually used. The traditional sampler generally completes air sampling by extraction, and then the sample is sent to the placement of the detection equipment for detection. During the sample transfer process, the detection result may be erroneous due to the reaction change of the pollutant itself.

[0004] In addition, the sample obtained by the existing sampling method is not convenient for the division of the staff. The same air sampling at different times will produce different detection results. Furthermore, the existing sampling method also affects the content of particulate matter in the sample. The particulate matter in the air is inconsistent with the air flow rate when moving to the sampling device under the influence of the above reasons, so that the accuracy of the detection result cannot be guaranteed. In view of this, the present application provides an automatic monitoring device for air particulate matter comparison. SUMMARY

[0005] In view of one of the deficiencies of the prior art, the present application provides an automatic monitoring device for air particulate matter comparison to solve the problems of air sample collection and detection.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an automatic monitoring device for air particulate matter comparison, comprising:

[0007] The sampling part can sample external air;

[0008] The detection part is arranged on one side of the sampling part and can receive the sample collected by the sampling part and detect it;

[0009] The sampling part comprises:

[0010] The air extraction unit can extract external air;

[0011] The separation unit is arranged below the air extraction unit and comprises a sampling cutter connected with the air extraction unit and capable of receiving the air sample in the air extraction unit;

[0012] A replacement unit is provided in cooperation with the separation unit, and can replace the filter element of the sampling cutter;

[0013] The detection unit comprises:

[0014] The detection box is a constant temperature and humidity box, and a detection mechanism is arranged in the detection box;

[0015] A transfer unit is arranged close to the separation unit, and can transfer the sample in the separation unit to the inside of the detection box.

[0016] Preferably, the replacement unit is arranged below the separation unit, and the replacement unit comprises:

[0017] A first bearing table can drive the filter element to move towards or away from the sampling cutter;

[0018] A second bearing table can drive the filter element to rotate when the first bearing table moves away from the sampling cutter;

[0019] A sampling channel is arranged on the horizontal side of the second bearing table corresponding to the transfer unit.

[0020] Preferably, the air extraction unit comprises:

[0021] A support structure is fixedly arranged on the horizontal side of the detection box;

[0022] A sampling mechanism is arranged in the support structure, and the sampling cutter and the sampling mechanism are in communication;

[0023] A driving mechanism is in cooperation with the sampling mechanism, and can drive the sampling mechanism to extract the air sample or drive the sampling mechanism to deliver the air sample to the sampling cutter.

[0024] Preferably, the separation unit comprises a plurality of sampling cutters;

[0025] The first bearing table and the second bearing table are respectively provided with filter element placement positions corresponding to the number of sampling cutters;

[0026] The sampling mechanism comprises:

[0027] A sampling shell is fixedly arranged in the support structure;

[0028] A sampling cavity is a chamber arranged in the sampling shell, and the number of sampling cavities corresponds to the number of sampling cutters; the sampling cutter and the sampling cavity are in communication;

[0029] An air inlet and exhaust assembly is connected with the sampling cavity; the driving mechanism is in cooperation with the air inlet and exhaust assembly, and the driving mechanism can drive the air inlet and exhaust assembly to inject or discharge the air sample from the sampling cavity.

[0030] Preferably, a sampling port is arranged on the wall of the sampling chamber.

[0031] The air inlet and exhaust assembly comprises:

[0032] A sealing door is movably connected with the sampling port of the sampling chamber; the driving mechanism can drive the sealing door to open or close; a transparent observation window is arranged on the sealing door.

[0033] An air bag is arranged on the upper side of the inside of the sampling chamber; the driving mechanism can drive the air bag to expand or contract.

[0034] Preferably, the sampling shell is in the overall structure of a truncated cone, and the small-area end is the upper end.

[0035] An open port is arranged at the bottom of the sampling chamber; the sampling chamber further comprises:

[0036] A base is vertically and slidably connected with the open port at the bottom of the sampling chamber; the edge of the base is hingedly connected with the lower edge of the sealing door, and a sealing door resetting member is arranged at the connection position.

[0037] The base and the driving mechanism are linked; when the base is aligned with the open port at the bottom of the sampling chamber, the sealing door is attached to the inner wall of the sampling shell.

[0038] Preferably, an insertion plate is arranged on the upper edge of the sealing door; a sealing insertion slot is arranged in the inside of the sampling chamber corresponding to the insertion plate; the insertion plate can be inserted into the sealing insertion slot.

[0039] Preferably, the air bag further comprises:

[0040] An air bag pipeline extends to the inside of the air bag.

[0041] An air bag spring is arranged in the inside of the air bag; the two ends of the air bag spring are fixedly connected with the inner top surface and the inner bottom surface of the air bag.

[0042] The driving mechanism comprises:

[0043] A motor is used as the power source of the driving mechanism.

[0044] An air suction fan is linked with the motor,

[0045] An air suction chamber is arranged in the inside of the air suction fan; the air bag pipeline is in communication with the inside of the air suction chamber; a through slot is arranged on the wall of the air suction chamber.

[0046] Preferably, a clamping slot is arranged on the upper part of the sampling chamber; the top of the air bag is fixedly connected with the clamping slot.

[0047] Preferably, the sampling shell comprises:

[0048] a central cavity, which is a cylindrical cavity formed in the center of the sampling shell;

[0049] a connecting cylinder, which is sleeved in the central cavity, and the connecting cylinder and the central cavity are in sliding connection, the sliding direction being the axial direction of the central cavity; the lower part of the connecting cylinder is fixedly connected to the base through a connecting rod;

[0050] The driving mechanism further comprises:

[0051] a driving shaft, which is connected to the motor shaft of the motor, and the driving shaft is connected to the connecting cylinder and can drive the connecting cylinder to slide in the central cavity.

[0052] Preferably, the driving shaft is sleeved in the connecting cylinder; the driving shaft comprises:

[0053] a spiral groove, which is formed on the outer wall of the shaft rod of the driving shaft and is a spiral groove;

[0054] a circular ring groove, which is formed on the upper part of the outer part of the driving shaft and is in communication with the upper end of the spiral groove;

[0055] a one-way component, which is arranged at the communication position of the circular ring groove and the spiral groove;

[0056] The sampling shell further comprises:

[0057] a guide block, which is fixedly arranged in the connecting cylinder and is in sliding connection with the spiral groove or the circular ring groove;

[0058] When the driving shaft rotates in direction one, the guide block can enter the spiral groove through the circular ring groove; when the driving shaft rotates in direction two, the guide block only slides in the circular ring groove; the direction one and the direction two are opposite.

[0059] Preferably, the driving shaft comprises an upper shaft rod and a lower shaft rod, and the spiral groove and the circular ring groove are arranged on the lower shaft rod of the driving shaft;

[0060] The driving mechanism further comprises:

[0061] a fan shaft, on which the fan blades of the air suction fan are arranged; the fan shaft is a hollow shaft rod, and the fan shaft is sleeved outside the upper shaft rod of the driving shaft;

[0062] a fan seat, which is fixedly arranged at the bottom of the fan shaft;

[0063] a linkage member, which is arranged on the upper side of the connecting cylinder and can rotate coaxially with the driving shaft; when the connecting cylinder rises, the driving shaft can be connected to the fan seat through the linkage member.

[0064] Compared with the prior art, the sampling device has the following beneficial effects:

[0065] 1、This scheme can directly obtain samples from the atmosphere through the sampling unit, and then directly detect by the detection part, without external transfer of samples, and sequentially complete sampling and detection inside the device.

[0066] 2、Compared with the traditional extraction sampling method, the device can make the air sample more close to the real situation of the air quality of the surrounding environment, and also more convenient for the staff to control the sample amount, with ingenious design and strong practicality.

[0067] 3、The driving mechanism of the device not only realizes the consecutive performance of the two steps of sampling from the outside and injecting the sample into the detection equipment, but also ensures that the sample moves to the sampling cutter under the premise of not intersecting with the outside air through the design of the air bag, further ensuring the authenticity of the sample. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0069] Figure 2 is a hidden sampling part shell state diagram of the embodiment of the present application;

[0070] Figure 3 is Figure 2 A partial enlarged view of

[0071] Figure 4 is a schematic diagram of the air extraction unit and the separation unit of the embodiment of the present application;

[0072] Figure 5 is an exploded schematic diagram of the air extraction unit and the separation unit of the embodiment of the present application;

[0073] Figure 6 is a schematic diagram of the internal structure of the sampling shell of the embodiment of the present application;

[0074] Figure 7 is a schematic diagram of the half-section structure of the sampling shell of the embodiment of the present application;

[0075] Figure 8 is a schematic diagram of the connection relationship between the sealing door and the driving mechanism of the embodiment of the present application;

[0076] Figure 9 is an exploded view of the driving mechanism of the embodiment of the present application;

[0077] Figure 10 is a schematic diagram of the related component structure of the air extraction fan of the embodiment of the present application;

[0078] Figure 11 is a schematic diagram of the cross-sectional structure of the driving shaft of the embodiment of the present application;

[0079] Figure 12Figure 1 is a schematic view of a cross-section of an air bag according to an embodiment of the present application.

[0080] Figure 1 is a schematic view of a cross-section of an air bag according to an embodiment of the present application.

[0081] 100, sampling unit;

[0082] 1, suction unit; 11, support structure; 12, sampling shell; 121, central cavity; 122, connecting cylinder; 123, guide block; 13, sampling cavity; 131, base; 132, sealing slot; 14, air intake and exhaust assembly; 141, sealing door; 142, air bag; 1421, air bag pipeline; 1422, air bag spring; 15, driving mechanism; 151, motor; 152, suction fan; 153, suction cavity; 154, drive shaft; 1541, helical groove; 1542, circular ring groove; 1543, plug-in groove; 155, fan shaft; 156, fan seat; 1561, push slot; 1562, guide slot; 157, linkage; 1571, plug; 1581, rotating rod; 1572, plug rod; 1582, baffle; 1583, rod groove; 1584, coil spring;

[0083] 2, separation unit; 21, sampling cutter; 22, valve;

[0084] 3, replacement unit; 31, first bearing table; 32, second bearing table;

[0085] 200, detection unit; 201, detection box; 202, transfer unit. DETAILED DESCRIPTION

[0086] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0087] Please refer to Figures 1-3 The present application provides the following technical solutions:

[0088] An automatic monitoring device for air particulate matter comparison, comprising a sampling unit 100 and a detection unit 200 arranged side by side. The sampling unit 100 can sample external air; the detection unit 200 can receive the sample collected by the sampling unit 100 and detect it.

[0089] The sampling part 100 comprises an air extraction unit 1, a separation unit 2 and a replacement unit 3. The air extraction unit 1 can extract external air; the separation unit 2 is arranged below the air extraction unit 1 and comprises three sampling cutters 21 connected with the air extraction unit 1 and capable of receiving air samples in the air extraction unit 1; and the replacement unit 3 is linked with the separation unit 2 and capable of replacing filter elements of the sampling cutters 21.

[0090] The detection part 200 comprises a detection box 201 which is a constant temperature and humidity box and is internally provided with detection mechanisms in addition to constant temperature and humidity related components. In addition, the detection box 201 is internally provided with a transfer unit 202 which is a mechanical arm arranged close to the separation unit 2 and capable of transferring samples in the separation unit 2 to the inside of the detection box 201.

[0091] The sampling part 100 and the detection part 200 are arranged side by side, so that the collected samples can be detected in real time. The device can be placed in a relevant place that needs to be monitored regularly or irregularly, such as a factory environment with smoke emission in the production process. The detection box 201 in the present scheme can use an existing constant temperature and humidity box and its internal detection device, which will not be described here. The specific structure of the transfer unit 202 is not limited, as long as it can pick up the filter elements in the sampling cutters 21. The atmospheric samples are collected by the sampling cutters 21, and the pollutants in the samples are left on the filter elements by the sampling cutters 21. Then the transfer unit 202 transfers the filter elements to the detection box 201 for detection.

[0092] On the basis of the above-mentioned embodiments, referring to Figure 2 and Figure 3 The replacement unit 13 is arranged below the separation unit 2, and the replacement unit 3 comprises a first bearing table 31 and a second bearing table 32. The first bearing table 31 is a lifting table, which can drive the filter elements to move towards or away from the sampling cutters 21. The second bearing table 32 is a rotating table, which can drive the filter elements to rotate when the first bearing table 31 moves away from the sampling cutters 21. The horizontal side of the second bearing table 32 is provided with a sampling channel corresponding to the transfer unit 202.

[0093] The first bearing table 31 is located below the second bearing table 32, and a lifting motor is arranged below the first bearing table 31, the lifting motor is fixedly connected with an external support structure, a vertical rack is fixedly arranged on the lower side of the first bearing table 31, a gear is arranged on the motor shaft of the lifting motor, and the first bearing table 31 is driven to lift through the gear and the rack. A lifting plate is fixedly connected to the upper side of the first bearing table 31 through a support rod, a plurality of supports corresponding to the number of sampling cutters 21 are arranged on the lifting plate, and the supports can support the filter elements. In addition, a rotating frame is arranged on the upper side of the first bearing table 31, the rotating frame can directly adopt a rod body, and the second bearing table is fixedly connected to the upper part of the rotating frame. A rotating motor is fixedly arranged on one side of the first bearing table 31, the motor shaft of the motor is connected with the rotating frame through a synchronous belt and a synchronous wheel, and the second bearing table 32 can be driven to rotate through the rotating motor. The lifting motor and the rotating motor are only distinguished in name because of their functions, and are not special in themselves.

[0094] A through groove corresponding to the number of sampling cutters is formed in the table surface of the second bearing table 32, and the supports on the lifting plate can pass through the through groove on the second bearing table 32. The top of the support is provided with a placing position corresponding to the filter element. A valve 22 is arranged on the lower air path of the sampling cutter 21, and the valve 22 is an electromagnetic valve. When the sampling cutter 21 is ready to work, the first bearing table 31 rises, so that the filter element on the support abuts against the air path below the valve 22, and sampling is performed. After the sampling time can meet the requirement that the filter element retains appropriate pollutant samples, the sampling cutter 21 stops working, the first bearing table 31 descends, and the supports descend synchronously with the descending of the first bearing table 31, and the filter element is left on the second bearing table 32 because the radius of the filter element is greater than the radius of the through groove on the second bearing table 32. Through the rotation of the second bearing table 32, the filter element is delivered to a position where the transfer unit 202 can take one by one.

[0095] On the basis of the above-mentioned embodiment, referring to Figures 4-6 , the air extraction unit 1 comprises a support structure 11 fixedly arranged on one horizontal side of the detection box 201, and the shape of the support structure 11 is not limited, as long as it can provide support. The support structure 11 is internally provided with a sampling mechanism, the sampling cutter 21 is in communication with the inside of the sampling mechanism. In addition, a driving mechanism 15 is arranged, the driving mechanism 15 is connected with the sampling mechanism, the driving mechanism 15 drives the sampling mechanism to extract the air sample, and then drives the sampling mechanism to deliver the air sample to the sampling cutter 121 after the sample is extracted.

[0096] The sampling mechanism comprises a sampling shell 12, which is a conical frustum shell structure with a small-area end at its upper end and is fixedly arranged inside the support structure 11. A plurality of chambers serving as sampling cavities 13 are formed in the sampling shell 12, and the number of the sampling cavities 13 corresponds to the number of the sampling cutters 21. The upper end of the sampling cutter 21 is connected to the inside of the sampling cavity 13 through a pipeline. An air inlet and exhaust assembly 14 is arranged in the sampling cavity 13. The driving mechanism 15 is linked with the air inlet and exhaust assembly 14, and the driving mechanism 15 can drive the air inlet and exhaust assembly 14 to inject or exhaust the air sample in the sampling cavity 13.

[0097] A sampling port is formed in the wall of the sampling cavity 13. The air inlet and exhaust assembly 14 comprises a sealing door 141 hinged to the sampling port of the sampling cavity 13, and the driving mechanism 15 can drive the sealing door 141 to open or close. A transparent observation window is arranged on the sealing door 141. A clamping groove is arranged on the upper side of the sampling cavity 13, and an air bag 142 is arranged in the clamping groove. The top of the air bag 142 is fixedly connected to the clamping groove, and the driving mechanism 15 can drive the air bag 142 to expand or contract in the sampling cavity 13. The shapes of the sampling cavity 13 and the air bag 142 correspond to each other, and both are approximately fan-shaped platforms.

[0098] Through the structure of the scheme, the air bag 142 is in a contracted state in the initial state. When it is necessary to extract an air sample, the driving mechanism 15 drives the sealing door 141 to open, and air enters the sampling cavity 13. Then, the driving mechanism 15 drives the sealing door 141 to close. At this time, the air sample in the sampling cavity 13 can be input to the sampling cutter 21. The driving mechanism 15 drives the air bag 142 to expand. The expanded air bag 142 fills the space in the sampling cavity 13, and pushes the air sample in the sampling cavity 13 into the sampling cutter 21 for sampling.

[0099] On the basis of the above-mentioned embodiment, an open port is arranged at the bottom of the sampling cavity 13, which serves as an air inlet for sampling. That is, an open structure is arranged on the bottom surface of the sampling shell 12, and the open structure is a fan-shaped structure. A base 131 corresponding to the fan-shaped structure is arranged. The base 131 and the open port at the bottom of the sampling cavity 13 are vertically and slidably connected. The edge of the base 131 is hinged to the lower edge of the sealing door 141, and a sealing door reset member is arranged at the connection position of the base 131 and the sealing door 141. The sealing door reset member can be a torsion spring. The base 131 is linked with the driving mechanism 15. When the base 131 is flush with the open port at the bottom of the sampling cavity 13, that is, when the sampling cavity 13 is in a closed state, the sealing door 141 is attached to the inner wall of the sampling shell 12.

[0100] In addition, referring to Figure 7 and Figure 8The upper edge of the sealing door 141 is provided with an insertion plate 1411, and a sealing insertion slot 132 is formed in the inside of the sampling cavity 13 corresponding to the insertion plate 1411. When the base 131 rises to close the sampling cavity 13, the insertion plate 1411 is inserted into the sealing insertion slot 132, and in this state, the external air no longer enters the inside of the sampling cavity 13.

[0101] Through this structure, when the air sample needs to be collected, the driving mechanism 15 drives the base 131 to descend, and the base drives the sealing door 141 to descend synchronously. With the descent of the sealing door 141, the gap between the sealing door 141 and the inner wall of the sampling shell 12 becomes larger, and under the action of the sealing door reset member, the sealing door 141 rotates towards the inner wall of the sampling shell 12. At this time, in addition to the air inlet passage formed by the base 131 and the bottom of the sampling shell 12, an air inlet gap is also formed between the side surface of the sealing door 141 and the side cavity wall of the sampling cavity 13. Moreover, the advantage of this air inlet form is that, because the sealing door 141 does not rotate in the initial stage of the descent of the base 131, at this time, with the downward movement of the base 131, a downward separation force is formed on the air in the inside of the sampling cavity 13, so that the air pressure in the inside of the sampling cavity 13 is reduced to form a negative pressure. With the continuous descent of the base 131, the strip-shaped gap channel formed by the side surface of the sealing door 141 forms an air inlet, so that the external air more easily enters from the side, thereby discharging the air originally in the sampling cavity 13, and ensuring the accurate collection of the air sample.

[0102] On the basis of the above-mentioned embodiments, referring to Figure 12 The air bag 142 is a fan-shaped bag body corresponding to the sampling cavity 13, and an air bag spring 1422 is arranged in the inside of the air bag 142. The two ends of the air bag spring 1422 are fixedly connected with the inner top surface and the inner bottom surface of the air bag 142, respectively. In addition, the air bag 142 is connected with an air bag pipeline 1421, and the air bag pipeline 1421 is a bent pipe, and one end of the pipeline extends into the inside of the air bag 142.

[0103] The driving mechanism 15 includes a motor chamber and an air suction chamber 153. The motor chamber is fixedly arranged above the sampling shell 12, and a motor 151 is fixedly arranged in the motor chamber. The motor 151 serves as a power source of the driving mechanism 15. The air suction chamber 153 is fixedly arranged on the upper surface of the sampling shell 12, and an air suction fan 152 is arranged in the air suction chamber 153. The air suction fan 152 is connected with the motor 151 and is driven by the motor 151 to rotate and work. One end of the air bag pipeline 1421 away from the air bag 142 is in communication with the inside of the air suction chamber 153. One air suction pipeline 1421 is arranged corresponding to each air bag 142, and a through slot or a through hole corresponding to the number of air suction pipelines 1421 is formed in the top of the cavity wall of the air suction chamber 153.

[0104] Through the structure of the present solution, the synchronous inflation or deflation of all air bags 142 can be realized by means of one air extraction fan 152. The air bag spring 1422 is arranged in the air bag 142, and the contracted state of the air bag 142 is the natural state of the air bag spring 1422. When the air bag 142 is inflated, the air bag spring 1422 is stretched. Because the air bag spring 1422 itself has no guiding or limiting structure on the circumferential side except the connection relationship with the two ends and the air bag 142, the inflation of the air bag 142 is not affected by the position of the air bag spring 1422. When the air bag is retracted, the rebound force of the air bag spring 1422 can be used to complete the air bag deflation more quickly.

[0105] On the basis of the above-mentioned embodiments, referring to Figure 7 and Figure 8 , the inside of the sampling shell 12 is provided with a central cavity 121, which is a cylindrical cavity arranged at the central axis of the sampling shell 12. The connecting cylinder 122 is sleeved and connected in the central cavity 121, and the connecting cylinder 122 and the central cavity 121 are slidingly connected in the axial direction of the central cavity 121. The lower part of the connecting cylinder 122 is fixedly connected to the base 131 through the connecting rod. A plurality of limiting strips are arranged on the outer wall of the connecting cylinder 122, and the limiting strips are arranged in the axial direction of the connecting cylinder 122, that is, the limiting strips are arranged in the vertical direction. Limiting grooves are arranged on the cavity wall of the central cavity 121 corresponding to the limiting strips, and the limiting strips and the limiting grooves are vertically slidingly connected. This structure ensures that the connecting cylinder 122 only vertically slides and does not rotate.

[0106] On the basis of the above-mentioned embodiments, the driving mechanism 15 further comprises a driving shaft 154, which is connected with the motor shaft of the motor 151. The driving shaft 154 is sleeved in the connecting cylinder 122. A spiral groove 1541 and a circular ring groove 1542 are respectively arranged on the outer wall of the shaft rod of the driving shaft 154. The spiral groove 1541 is a spiral groove. The circular ring groove 1542 is a circular ring groove arranged on the outer upper part of the driving shaft 154, and the upper ends of the circular ring groove 1542 and the spiral groove 1541 are communicated. A one-way assembly is arranged at the communication position of the circular ring groove 1542 and the spiral groove 1541. Referring to Figure 9 a guide block 123 is fixedly arranged in the connecting cylinder 122. The guide block 123 can be hemispherical or cylindrical, as long as it can be slidingly connected with the spiral groove 1541 or the circular ring groove 1542. The one-way assembly functions as follows: when the driving shaft 154 rotates in direction one, the guide block 123 can enter the spiral groove 1541 through the circular ring groove 1542; when the driving shaft 154 rotates in direction two, the guide block 123 only slides in the circular ring groove 1542; direction one and direction two are opposite, that is, direction one and direction two are counterclockwise and clockwise, respectively.

[0107] Through the structure, in the initial state, the guide block 123 is located in the circular groove 1542, when the driving shaft 154 rotates in direction one, the guide block 123 enters the spiral groove 1541 after passing through the circular groove 1542, then with the rotation of the driving shaft 154, the guide block 123 moves downward, that is, the connecting cylinder 122 moves downward, so that the connecting seat 131 is opened. Conversely, when the driving shaft 154 rotates in direction two, the connecting cylinder 122 rises until the guide block 123 enters the circular groove 1542, then the guide block 123 rotates in the circular groove 1542, because of the effect of the one-way component, the guide block 123 does not enter the spiral groove when rotating in direction two. The effect of the circular groove 1542 will be described in detail later.

[0108] On the basis of the above-mentioned embodiment, see Figures 9-11 The driving shaft 154 includes an upper shaft and a lower shaft, the spiral groove 1541 and the circular groove 1542 are arranged on the lower shaft of the driving shaft 154, and the outer diameter of the upper shaft is smaller than that of the lower shaft.

[0109] The driving mechanism 15 further includes a fan shaft 155, the fan blades of the suction fan 152 are arranged around the fan shaft 155; the fan shaft 155 is an internally hollow shaft, the fan shaft 155 is sleeved outside the upper shaft of the driving shaft 154, and the fan shaft 155 and the upper shaft can rotate freely. The fan seat 156 is fixedly connected to the bottom of the fan shaft 155, and the fan seat 156 is a circular seat.

[0110] The linkage 157 is arranged to rotate on the upper side of the connecting cylinder 122, the linkage 157 includes a circular body, an insertion strip 1571 is arranged in the circular body, and a plurality of insertion rods 1572 are arranged on the upper portion of the circular body. The insertion strip 1571 is in an elongated strip structure, and a plug-in groove 1543 corresponding to the insertion strip 1571 is arranged on the driving shaft 154, and the plug-in groove is a vertical slot structure. The insertion strip 1571 of the linkage 157 is clamped in the plug-in groove 1543. Through the cooperation of the insertion strip 1571 and the plug-in groove 1543, the linkage 157 can rotate coaxially with the driving shaft 154, and the linkage 157 can rise and fall with the connecting cylinder 122.

[0111] The insertion rods 1572 are circular rods, the push slot 1561 is a vertical arc-shaped slot, and the arc surface thereof corresponds to the outer diameter of the insertion rod 1572. The guide slot 1562 is arranged between adjacent push slots 1561, and the guide slot is a circular arc slot.

[0112] When the connecting cylinder 122 rises, the linkage 157 rises to the position where the insertion rod 1572 contacts the fan seat 156, the insertion rod 1572 is clamped into the actuating slot 1561 under the guidance of the guide slot 1562, so that the fan seat 156 can be rotated, and the fan seat 156 can drive the air suction fan 152 to work through the fan shaft 155.

[0113] When the air sample needs to be extracted, the driving shaft 154 rotates in direction one, the driving shaft 154 drives the connecting cylinder 122 to descend, the base 131 and the sealing door 141 are opened, the air inlet passage of the sampling cavity 13 is formed, and the air sample enters the sampling cavity. During this process, because the linkage 157 descends with the connecting cylinder 122, the linkage 157 and the fan seat 156 are separated, and the air suction fan 152 does not work. Next, the driving shaft 154 is reversed, and rotates in direction two. When the connecting cylinder 122 returns to the closed state of the sampling cavity 13, the linkage 157 also contacts the fan seat 156, and the insertion rod 1572 is clamped in the actuating slot 1561. The driving shaft 154 remains rotating in direction two, at this time, the guide block 123 is maintained in the circular ring slot 1542, the position of the connecting cylinder 122 does not change, and the linkage 157 can continue to rotate, the linkage 157 drives the air suction fan 152 to work, the air suction fan 152 injects air into the air bag 142, as the air bag 142 expands, the air sample in the sampling cavity 13 is pushed into the sampling cutter 21, and the air sample is cut. The whole sampling process only needs to change the movement direction of the motor 151, so that the air sample can be extracted and transported, and the working process is simple and reliable.

[0114] On the basis of the above-mentioned embodiments, referring to Figure 10 , the one-way assembly only needs to meet the above-mentioned requirements, and can be realized in different ways, and the present scheme provides a specific implementation form as follows.

[0115] The spiral slot 1541 is connected with the baffle 1582 through the rotating rod 1581 rotating at the communication part of the circular ring slot 1542, the baffle 1582 is inclinedly arranged, the shape of the baffle 1582 corresponds to the inclined surface structure of the inner wall of the spiral slot 1541, and the side surface of the baffle 1582 away from the communication part of the spiral slot 1541 and the circular ring slot 1542 can be blocked by the bottom surface of the circular ring slot 1542. The driving shaft 154 is provided with the rod slot 1583 rotatingly connected with the rotating rod 1581, the rotating rod 1581 is sleeved with the coil spring 1584 at the side end portion away from the baffle 1582, and the outer side end of the coil spring 1584 is connected and fixed with the inner wall of the rod slot 1583.

[0116] When the driving shaft 154 rotates in direction one, the direction one of the present solution is counterclockwise rotation in the reference of the top view. The guide block 123 will be in contact with the baffle plate 41 towards one side wall of the spiral groove 37, but under the limitation of the bottom surface of the circular ring groove 38, the baffle plate 41 cannot be deflected away from the spiral groove 37, so the guide block 39 will have a tendency to move into the spiral groove 37 under the reaction force of the baffle plate 41.

[0117] Conversely, when in direction two state, the guide block 123 enters the circular ring groove 1542, because the direction of rotation at this time is opposite, the guide hole 123 can push the baffle plate 41 to rotate without affecting the guide block 123 to continue rotating in the circular ring groove 1542.

[0118] In the description of the present application and its embodiments, it should be understood that the terms "top", "bottom", "height" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0119] In the present application and its embodiments, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected", "fixed" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0120] In the present application and its embodiments, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0121] The foregoing disclosure provides many different embodiments or examples for implementing different structures of the present application. For purposes of simplicity of the present disclosure, the foregoing description has set forth various aspects of the present application in connection with specific examples. It should be apparent to those skilled in the art that certain embodiments of the application can be practiced without the specific details set forth herein. Furthermore, to the extent that the prior art maintains any type of description, the foregoing disclosure provides examples of the various specific processes and materials that can be employed in connection with the application. Those in the art will recognize the many variations that can be made to the techniques described herein, without departing from the spirit and true scope of the application.

[0122] While the preferred embodiments of the application have been described above, it should be understood that many modifications and adaptations can be made by those skilled in the art without departing from the spirit and scope of the application. Accordingly, the appended claims are intended to encompass within their scope all adaptations and modifications as are within the scope of the application.

[0123] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. An automatic monitoring device for air particulate matter comparison, characterized by, The utility model relates to a sampling device for detecting air quality, comprising: a sampling part for sampling external air; a detection part arranged on one side of the sampling part for receiving the sample collected by the sampling part and detecting; the sampling part comprises: an air extraction unit for extracting external air; a separation unit arranged below the air extraction unit, the separation unit comprising a sampling cutter connected with the air extraction unit for receiving the air sample in the air extraction unit; a replacement unit linked with the separation unit for replacing the filter of the sampling cutter; the detection part comprises: a detection box which is a constant temperature and humidity box, and is internally provided with a detection mechanism; a transfer unit arranged close to the separation unit for transferring the sample in the separation unit to the inside of the detection box; the air extraction unit comprises: a support structure fixedly arranged on one horizontal side of the detection box; a sampling mechanism arranged in the support structure, the sampling cutter and the sampling mechanism being in internal communication; a driving mechanism linked with the sampling mechanism for driving the sampling mechanism to extract the air sample or driving the sampling mechanism to deliver the air sample to the sampling cutter; the sampling mechanism comprises: a sampling shell fixedly arranged in the support structure; a sampling cavity which is a chamber opened in the sampling shell, the number of the sampling cavities corresponding to the number of the sampling cutters, the sampling cutters and the sampling cavities being in internal communication; an air inlet and exhaust assembly connected with the sampling cavities, the driving mechanism and the air inlet and exhaust assembly being linked, the driving mechanism being capable of driving the air inlet and exhaust assembly to inject or discharge the air sample into or from the sampling cavities; a sampling port opened on the cavity wall of the sampling cavity; the air inlet and exhaust assembly comprises: a sealing door movably connected with the sampling port of the sampling cavity, the driving mechanism being capable of driving the sealing door to open or close, the sealing door being provided with a transparent observation window; an air bag arranged on the upper side in the sampling cavity, the driving mechanism being capable of driving the air bag to expand or contract.

2. The automatic monitoring device for air particulate matter comparison of claim 1, wherein, the replacement unit is arranged below the separation unit, and the replacement unit comprises: a first bearing table capable of driving the filter to move towards or away from the sampling cutter; a second bearing table capable of driving the filter to rotate when the first bearing table moves away from the sampling cutter; a sampling channel provided on one horizontal side of the second bearing table corresponding to the transfer unit.

3. The automatic monitoring device for air particulate matter comparison of claim 2, wherein, the separation unit comprises a plurality of sampling cutters; the first bearing table and the second bearing table are respectively provided with filter placement positions corresponding to the number of the sampling cutters.

4. The automatic monitoring device for air particulate matter comparison of claim 1, wherein, the sampling shell is in the overall structure of a conical table, and the small-area end thereof is the upper end; the bottom of the sampling cavity is provided with an open port, and the sampling cavity further comprises: a base vertically and slidingly connected with the open port of the bottom of the sampling cavity, the edge of the base being hingedly connected with the lower edge of the sealing door, and the connection part of the base and the sealing door being provided with a sealing door resetting member; the base and the driving mechanism are linked, and when the base and the open port of the bottom of the sampling cavity are flush, the sealing door and the inner wall of the sampling shell are attached.

5. The automatic monitoring device for air particulate matter comparison of claim 4, wherein, the air bag further comprises: an air bag pipeline extending to the inside of the air bag; an air bag spring arranged in the air bag, the two ends of the air bag spring being fixedly connected with the inner top surface and the inner bottom surface of the air bag, respectively; the driving mechanism comprises: A motor as a power source of a driving mechanism; An air extraction fan connected with the motor, An air extraction chamber in which the air extraction fan is arranged, the air bag pipeline is connected with the air extraction chamber, and a through slot is arranged on the wall of the air extraction chamber.

6. The automatic monitoring device for air particulate matter comparison of claim 5, wherein, The sampling shell comprises: A central cavity which is a cylindrical cavity arranged on the axis of the sampling shell; A connecting cylinder which is sleeved in the central cavity, the connecting cylinder and the central cavity are in sliding connection, and the sliding direction is the axial direction of the central cavity; the lower part of the connecting cylinder is fixedly connected with the base through a connecting rod; The driving mechanism further comprises: A driving shaft which is connected with the motor shaft of the motor; and the driving shaft is connected with the connecting cylinder, so that the connecting cylinder can slide in the central cavity.

7. The automatic monitoring device for air particulate matter comparison of claim 6, wherein, The driving shaft is sleeved in the connecting cylinder; the driving shaft comprises: A helical groove which is a helical groove arranged on the outer wall of the shaft rod of the driving shaft; A circular ring groove which is arranged on the upper part of the outer wall of the driving shaft, and the circular ring groove is connected with the upper end of the helical groove; A one-way component which is arranged at the connection position of the circular ring groove and the helical groove; The sampling shell further comprises: A guide block which is fixedly arranged in the connecting cylinder, and the guide block is in sliding connection with the helical groove or the circular ring groove; When the driving shaft rotates in direction one, the guide block can enter the helical groove through the circular ring groove; when the driving shaft rotates in direction two, the guide block only slides in the circular ring groove; the direction one and the direction two are opposite.

8. The automatic monitoring device for air particulate matter comparison of claim 7, wherein, The driving shaft comprises an upper shaft rod and a lower shaft rod, and the helical groove and the circular ring groove are arranged on the lower shaft rod of the driving shaft; The driving mechanism further comprises: A fan shaft on which the fan blades of the air extraction fan are arranged; the fan shaft is a hollow shaft rod, and the fan shaft is sleeved on the outer side of the upper shaft rod of the driving shaft; A fan base which is fixedly arranged on the bottom of the fan shaft; A linkage which is arranged on the upper side of the connecting cylinder, and the linkage is coaxially rotatable with the driving shaft; when the connecting cylinder rises, the driving shaft can be connected with the fan base through the linkage.

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