Gas collecting device for atmospheric pollution detection

Abstract

The invention relates to the field of air pollution detection equipment, in particular to a gas collection device for air pollution detection, which comprises a sampling cage, a barrier film and a tightening ring, the sampling cage is hollow, and the side wall is provided with at least two air channels communicated with the inside; the blocking film is arranged on one side of the sampling cage, the tightening ring is located on the side, away from the sampling cage, of the blocking film, and the tightening ring can be arranged on the sampling cage in a sleeving mode and can slide on the sampling cage. The air sampling device has the advantages that workers can sample air conveniently, and the labor burden of the workers is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of air pollution detection equipment, and in particular to a gas collection device for atmospheric pollution detection. Background Art

[0002] With the advancement and development of science and technology, more and more pollutants are released into the atmosphere, and the atmospheric environment has become a major factor affecting the public's health. Therefore, the atmospheric environment has also received widespread attention.

[0003] Air needs to be collected during atmospheric pollution detection, and a common air collection method is sampling ball sampling. It mainly includes a flat bladder and an air inlet pipe connected to the inside of the bladder. The air inlet pipe is connected to a hand-kneaded or foot-operated air pump, and air is injected into the bladder through the air pump to achieve air collection. For example, the utility model patent with publication number CN204514676U discloses a gas sampling device, which mainly includes a foot-operated air pump and a sampling bladder. The air outlet of the air pump is connected to the inside of the sampling bladder. The external air is drawn by the foot-operated air pump and injected into the sampling bladder to achieve air sampling.

[0004] During the air sampling process in the related art, the staff is required to apply pressure to the air pump back and forth, which causes the staff to easily experience sore hands and feet. Therefore, the sampling device in the related art has certain inconveniences during use. Summary of the Invention

[0005] In order to facilitate staff to sample air during environmental pollution detection and reduce their workload, the present application provides a gas collection device for atmospheric pollution detection.

[0006] The present application provides a gas collection device for atmospheric pollution detection using the following technical solutions:

[0007] A gas collection device for atmospheric pollution detection comprises a sampling cage, a barrier membrane, and a tightening ring. The sampling cage is hollow inside, and a side wall is provided with at least two air passages communicating with the interior. The barrier membrane is provided on one side of the sampling cage, and the tightening ring is located on the side of the barrier membrane facing away from the sampling cage. The tightening ring can be sleeved on the sampling cage and can slide on the sampling cage.

[0008] By adopting the above-mentioned technical solution, the two air channels on the sampling cage make it impossible for the sampling cage itself to store air. Therefore, before use, the gas collection device in this application can shake the sampling cage to allow the air from the polluted area to clean the sampling cage. Then, a tightening ring is slid from one side of the sampling cage, and the tightening ring moves from the side of the barrier film away from the sampling cage to the sampling cage, driving the barrier film to wrap around the outside of the sampling cage. As the tightening ring continues to move, the barrier film gradually blocks the air channel, so that the sampling cage forms a closed container, preventing the air inside the sampling cage from being discharged, and realizing rapid sampling of the air. Compared with the sampling device in the related art, the staff does not need a reciprocating air pump, which reduces the labor burden of the staff and improves the work efficiency of the staff.

[0009] Optionally, the sampling cage includes two parallel and spaced connection plates, and a plurality of connection strips arranged between the two connection plates, wherein a plurality of the connection strips are evenly spaced along the axis of the connection plates, and both ends of the connection strips are respectively connected to the two connection plates.

[0010] By adopting the above technical solution, the connecting strips are connected to the connecting plates to form a cage-shaped structure, and air channels are formed between adjacent connecting strips to facilitate the entry and exhaust of air.

[0011] Optionally, the barrier film as a whole is a circular sheet structure, and the connecting strip is a flexible structure.

[0012] By adopting the above technical solution, the barrier membrane has a circular structure. After it is wrapped around the cylindrical sampling cage, the sidewalls have wrinkles, which can also be understood as overlapping areas. The wrinkles have a certain impact on the volume inside the sampling cage. By bending the connecting strip, the barrier membrane can stretch, thereby increasing the volume of air that can be stored inside the barrier cage and facilitating the collection of more air.

[0013] Optionally, at least one end of the connecting strip is rotatably connected to the connecting disk, and the rotation axis of the connecting strip is tangent to the circumference of the connecting disk.

[0014] By adopting the above technical solution, the connecting strip is rotatably connected, which guides the deformation of the connecting strip and prevents it from bending in a direction tangential to the circumference of the connecting disk, thereby improving the smoothness of the collection device during use.

[0015] Optionally, a limiting surface is provided in the connection groove, and the limiting surface is used to prevent the middle position in the connection length direction from bending toward the direction close to the interior of the sampling cage.

[0016] By adopting the above technical solution, the limiting surface prevents the connecting strip from bending toward the inside of the sampling cage, thereby further improving the smoothness of the air collection process.

[0017] Optionally, an air inlet is provided on one of the connecting plates, and a blocking piece is provided on the other connecting plate. The blocking piece is spaced apart from the air inlet, and one end of the blocking piece can be inserted into the air inlet to block the air inlet.

[0018] By adopting this technical solution, during the air collection process, a tightening ring is first placed over the connecting disc. This restrains the barrier membrane, simultaneously blocking the air passages on the sidewalls of the sampling cage. The connecting strip is then controlled to bend, bringing the two connecting discs closer together, allowing air to enter the sampling cage through the air inlet. As the two connecting discs continue to move closer, and the connecting strip bends to a certain degree, a sealing member is inserted into the air inlet, sealing it and completing air collection.

[0019] Optionally, a limiting ring and an elastic ring are provided on the sealing member, and the limiting ring and the elastic ring are arranged on the sealing member at intervals along the length direction of the sealing member. The elastic ring is located on the side close to the air inlet, and the elastic ring is made of elastic material. The elastic ring can pass through the air inlet, and the elastic ring can abut against the connecting plate after passing through the air inlet.

[0020] By adopting the above technical solution, the two connecting disks are close to each other, the sealing piece is inserted into the air inlet, and drives the elastic ring to pass through the air inlet. Then the limiting ring and the elastic ring are respectively abutted against the two sides of the connecting disk to limit the sealing piece, thereby improving the stability of the collection device after the collection is completed.

[0021] Optionally, an annular mounting groove is provided on the side wall of the air inlet hole, an expansion sealing assembly is provided in the mounting groove, the expansion sealing assembly includes a container, the container is an annular structure corresponding to the mounting groove, the container is made of elastic material, the interior of the container is hollow, and a first agent and a second agent are provided inside the container, and the first agent and the second agent can generate gas when they come into contact.

[0022] By adopting the above technical solution, after the plugging member is inserted into the air inlet, the container member covers the outside of the plugging member. At this time, the reaction between the first agent and the second agent can generate gas in the container member, causing the container member to expand and press against the plugging member, thereby improving the stability of the plugging member in blocking the air inlet.

[0023] Optionally, the expansion sealing assembly further includes a fragile part, which is arranged inside the container and is hollow inside. The first agent or the second agent is arranged in the fragile part, and the fragile part can be broken by pressure.

[0024] By adopting the above technical solution, the first and second medicines are separated by the fragile member under normal conditions to avoid the situation where the blocking member cannot be inserted into the air inlet. After the blocking member is inserted into the air inlet, the fragile member is broken to mix the two medicines, thereby expanding the container.

[0025] Optionally, an extrusion piece is provided on the connection disk at a position corresponding to the accommodation piece, and the extrusion piece is slidably connected to the connection disk. When the blocking piece is inserted into the air inlet, the extrusion piece can be driven to approach the accommodation piece.

[0026] By adopting the above technical solution, when the sealing part is inserted into the air inlet, the extrusion part is driven to approach the containing part to squeeze the containing part, thereby breaking the fragile parts. The fragile parts can be broken without the need for staff, thereby improving the smoothness of the air collection device during use and thus improving the efficiency of air collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a state diagram of the gas collection device of an embodiment of the present application when no air is collected.

[0028] Figure 2 This is an enlarged view of the local structure of the gas collection device in the embodiment of the present application in the state where no air is collected, mainly used to show the structure of the limiting surface.

[0029] Figure 3 This is a state diagram of the gas collection device after collecting air in an embodiment of the present application.

[0030] Figure 4 This is a schematic diagram of the internal structure of the gas collection device in the air collection state of the embodiment of the present application.

[0031] Figure 5 This is an embodiment of the present application Figure 4 Enlarged view of part A.

[0032] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the gas collection device of an embodiment of the present application in a state where no air is collected.

[0033] Figure 7 This is an embodiment of the present application Figure 6 Magnified view of part B.

[0034] Figure 8 This is a diagram of the state after the blocking piece of the embodiment of the present application is inserted into the air inlet.

[0035] Figure numerals: 1. Sampling cage; 11. Connecting strip; 12. Connecting plate; 121. Top plate; 122. Bottom plate; 13. Connecting groove; 14. Connecting ring; 15. Rotating hole; 16. Limiting surface; 2. Barrier membrane; 3. Tightening ring; 31. Guide slope; 4. Mounting plate; 41. Pull ring; 42. Air inlet; 43. Sealing part; 44. Limiting ring; 45. Elastic ring; 451. Arc surface; 46. Limiting groove; 47. Mounting groove; 5. Expansion sealing assembly; 51. Receiving part; 52. Fragile part; 53. Extrusion part; 54. Linking rod; 55. Extrusion groove; 56. Sliding hole. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-8 This application is described in further detail.

[0037] An embodiment of the present application discloses a gas collection device for atmospheric pollution detection.

[0038] Reference Figure 1 and Figure 2 A gas collection device for atmospheric pollution detection includes a cylindrical sampling cage 1 with a hollow interior. A barrier membrane 2 is provided at the bottom of the sampling cage 1. The barrier membrane 2 is a circular sheet-like structure and is coaxially arranged with the sampling cage 1. The barrier membrane 2 is made of a flexible material and has good sealing properties. In this embodiment, the barrier membrane 2 is a plastic wrap. The sampling cage 1 is provided with an air passage that communicates with the interior of the sampling cage 1. A tightening ring 3 is provided on the side of the barrier membrane 2 facing away from the sampling cage 1. The inner diameter of the tightening ring 3 is larger than the diameter of the sampling cage 1. The tightening ring 3 can be placed on the outside of the sampling cage 1 and can slide along the length of the sampling cage 1. Sliding the tightening ring 3 toward the end facing away from the barrier membrane 2 gradually causes the barrier membrane 2 to wrap around the outside of the sampling cage 1. When the barrier membrane 2 completely blocks the air passage, a closed container is formed, thereby enabling rapid air sampling and reducing the burden on personnel.

[0039] Reference Figure 1 and Figure 2 The sampling cage 1 includes a connecting strip 11 and two circular connecting discs 12, which are arranged parallel to each other along their own axis. The connecting strip 11 is arranged between the two connecting discs 12, and multiple connecting strips 11 are evenly spaced along the axial direction of the connecting discs 12. The two ends of the connecting strip 11 are respectively connected to the two connecting discs 12 to form an internal hollow shell structure, and an air channel is formed between two adjacent connecting strips 11. The connecting strip 11 is made of an elastic material, such as elastomeric plastic, spring steel, etc. In this embodiment, the connecting strip 11 is made of elastomeric plastic.

[0040] Reference Figure 1 and Figure 3It should be understood that the barrier film 2 is a circular sheet structure, which has wrinkles after being wrapped around the outside of the sampling cage 1. It can also be understood that there are overlapping areas after the barrier film 2 is wrapped. Figure 4 , so that the middle position of the connecting strip 11 in the length direction is bent in the direction away from the interior of the sampling cage 1, thereby increasing the overall radial size of the sampling cage 1, stretching the barrier membrane 2, and increasing the overall volume of the closed container, thereby facilitating the collection of more air.

[0041] Reference Figure 1 and Figure 2 The two connecting plates 12 are defined as a bottom plate 122 and a top plate 121. The connecting plate 12 closest to the barrier membrane 2 is the bottom plate 122, and the other is the top plate 121. The diameter of the top plate 121 is larger than that of the bottom plate 122, ensuring an interference fit between the top plate 121 and the tightening ring 3. This improves the stability of the tightening ring 3 after it is clamped around the top plate 121 and enhances the sealing of the closed container formed when the barrier membrane 2 is wrapped around the sampling cage 1. In this embodiment, a rubber layer (not shown) is provided on the inner wall of the tightening ring 3 to further enhance the sealing of the closed container.

[0042] Reference Figure 1 and Figure 2 A guide slope 31 is provided on the sidewall of the top plate 121 near the bottom plate 122. The guide slope 31 slopes along the axis of the top plate 121, from the side closest to the top plate 121 to the side closest to the bottom plate 122, toward the axis of the top plate 121. The guide slope 31 guides the tightening ring 3 as it slides onto the top plate 121.

[0043] Reference Figure 1 and Figure 2 A connecting groove 13 is formed on the top plate 121 at a position corresponding to the connecting strip 11. The end of the connecting strip 11 away from the bottom plate 122 is inserted into the connecting groove 13 and is rotatably connected to the side wall of the connecting groove 13. The rotation axis of the connecting strip 11 is tangential to the circumference of the top plate 121. One end of the connecting strip 11 is rotatably connected to the top plate 121, thereby guiding the middle portion of the connecting strip 11 to bend radially along the top plate 121 or the bottom plate 122, thereby facilitating the expansion of the barrier film 2.

[0044] Reference Figure 1 and Figure 2 The top plate 121 is provided with a connecting ring 14, which is an annular structure with a circular cross-section. The connecting ring 14 is coaxially arranged with the top plate 121 and is sequentially inserted into the plurality of connecting grooves 13. The connecting bar 11 is provided with a rotation hole 15 at a position corresponding to the connecting ring 14. The connecting ring 14 is inserted into the rotation hole 15 to achieve a rotational connection between the connecting bar 11 and the top plate 121.

[0045] Reference Figure 4 and Figure 5The connecting groove 13 is opened on the side facing away from the axis of the top plate 121. After the connecting strip 11 is bent and deformed, the end of the connecting strip 11 near the top plate 121 tilts parallel to the axis of the top plate 121, from the side away from the bottom plate 122 to the side near the bottom plate 122, in a direction away from the axis of the top plate 121, and then passes through the connecting groove 13 from the side away from the axis of the top plate 121. In this state, the connecting strip 11 can abut against the tightening ring 3 already installed on the outside of the top plate 121, thereby preventing the tightening ring 3 from moving toward the bottom plate 122 and separating from the top plate 121. This improves the stability of the collection device after collection is completed.

[0046] Reference Figure 1 and Figure 2 A limiting surface 16 is provided in the connecting groove 13. This limiting surface 16 abuts the connecting strip 11 and prevents the connecting strip 11 from bending toward the interior of the sampling cage 1 at its intermediate position along its length. The end of the connecting strip 11 corresponding to the top plate 121 is defined as the movable end. The sidewall of the movable end abuts against the limiting surface 16. The limiting surface 16 tilts along the axis of the top plate 121, from the side away from the bottom plate 122 to the side close to the bottom plate 122, away from the axis of the top plate 121. This causes the movable end to be set at an angle to the axis of the top plate 121, and the connecting strip 11 as a whole has a tendency to bend away from the exterior of the sampling cage 1. During the actual air collection operation, after the tightening ring 3 moves to a position close to the top plate 121, it can pinch the top plate 121 and bottom plate 122, bringing them closer together. Under the action of force, the multiple connecting strips 11 can be deformed and bent synchronously, thereby rapidly changing the state of the sampling cage 1 and improving air collection efficiency.

[0047] Reference Figure 1 and Figure 2 A mounting plate 4 is provided on the side of the barrier membrane 2 facing away from the base plate 122. Mounting plate 4 is coaxial with base plate 122 and adhesively connected to the barrier membrane 2. A tightening ring 3 is sleeved onto the outside of mounting plate 4, connecting the tightening ring 3 to the sampling cage 1. A pull ring 41 is provided on the side of mounting plate 4 facing away from base plate 122. This pull ring 41 provides a force point for personnel to easily move the tightening ring 3.

[0048] Reference Figure 6 and Figure 7, an air inlet 42 is provided on the chassis 122, and the air inlet 42 passes through the chassis 122, the barrier membrane 2 and the mounting plate 4. A sealing member 43 capable of sealing the air inlet 42 is provided on the top plate 121. Under normal circumstances, the sealing member 43 is spaced apart from the chassis 122. During the air sampling process, the tightening ring 3 can be first put on the top plate 121, and then a force is applied to the top plate 121 and the chassis 122, so that the top plate 121 and the chassis 122 approach each other, and the connecting strip 11 bends. At this time, the air enters the interior of the sampling cage 1 from the air inlet 42; when the connecting strip 11 is bent to a certain extent, the sealing member 43 is inserted into the air inlet 42 to seal the air inlet 42, thereby completing the air sampling.

[0049] Reference Figure 6 and Figure 8 , a limiting ring 44 and an elastic ring 45 are provided on the sealing member 43, and are spaced apart from the elastic ring 45 in a direction parallel to the axis of the top plate 121. The limiting ring 44 and the elastic ring 45 are both annular structures, and are both sleeved on the sealing member 43 and integrally provided with the sealing member 43. An arc surface is provided on the outer wall of the elastic ring 45, and is made of elastic material. During the movement of the sealing member 43, the elastic ring 45 can be driven to pass through the air inlet 42. A limiting groove 46 is provided on the chassis 122 at a position corresponding to the limiting ring 44. After the sealing member 43 is inserted into the air inlet 42, the limiting ring 44 is embedded in the limiting groove 46 to limit the sealing member 43, preventing the top plate 121 from approaching the chassis 122, thereby controlling the bending degree of the connecting strip 11. After the limiting ring 44 is embedded in the limiting groove 46 , the elastic ring 45 is located on the side of the mounting plate 4 away from the chassis 122 , thereby preventing the blocking member 43 from detaching from the air inlet 42 and improving the stability of the blocking member 43 in blocking the air inlet 42 .

[0050] Reference Figure 6 and Figure 8 An annular mounting groove 47 is defined on the sidewall of the air inlet 42. An expansion seal assembly 5 is disposed within the mounting groove 47. The expansion seal assembly 5 comprises a container 51 and a fragile component 52. The container 51 is an annular structure coaxial with the chassis 122. The container 51 is embedded in the mounting groove 47 and bonded to the sidewall of the mounting groove 47. The container 51 is hollow, and the fragile component 52 is disposed within the container 51. The fragile component 52 is made of a brittle material; in this embodiment, the fragile component 52 is made of glass. A first agent (not shown) is disposed within the fragile component 52, while a second agent (not shown) is disposed within the container 51. The first and second agents react to produce gas upon contact. The container 51 is made of an elastic material; in this embodiment, the container 51 is made of rubber. As the gas within the container 51 increases, the inner wall of the container 51 presses against the sealing component 43, thereby improving the sealing performance of the sealing component 43 in blocking the air inlet 42. In this embodiment, the first agent and the second agent are hydrochloric acid and calcium carbonate respectively.

[0051] Reference Figure 6 and Figure 7 The expansion seal assembly 5 further includes an extrusion member 53 and a linkage rod 54. An extrusion groove 55 is provided on the side of the mounting groove 47 close to the top plate 121. The extrusion member 53 is mounted in the extrusion groove 55 and can be tilted in a direction parallel to the axis of the bottom plate 122. Figure 8 A sliding hole 56 is formed on the side wall of the extrusion groove 55, and the two ends of the sliding hole 56 are connected to the limiting groove 46 and the extrusion groove 55 respectively. The linkage rod 54 slides in the sliding hole 56 in a direction parallel to the axis of the bottom plate 122, and the end of the linkage rod 54 near the top plate 121 extends into the limiting groove 46. As the top plate 121 approaches the bottom plate 122, the limiting ring 44 is embedded in the limiting groove 46, and at the same time drives the linkage rod 54 to approach the extrusion member 53, which in turn drives the extrusion member 53 to squeeze the fragile member 52 inside the container 51, breaking it and promoting the mixing of the two medicines. In this embodiment, the fragile member 52 is an annular structure corresponding to the container 51, and the extrusion member 53 is configured as a corresponding annular structure to squeeze and break the fragile member 52.

[0052] The implementation principle of a gas collection device for atmospheric pollution detection in an embodiment of the present application is: when it is necessary to collect air in a polluted area, the gas collection device is taken out, and then the staff holds the pull ring 41 in one hand and the tightening ring 3 in the other hand, slides the tightening ring 3 close to the top plate 121, so that the barrier membrane 2 is covered on the outside of the sampling cage 1, thereby realizing rapid collection of air and reducing the pain in the hands and feet of the staff.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas collection device for atmospheric pollution detection, characterized in that: include: A sampling cage (1), a barrier film (2) and a tightening ring (3); the sampling cage (1) is hollow inside, and the side wall is provided with at least two air passages communicating with the inside; the barrier film (2) is provided on one side of the sampling cage (1); the tightening ring (3) is located on the side of the barrier film (2) facing away from the sampling cage (1); the tightening ring (3) can be sleeved on the sampling cage (1) and can slide on the sampling cage (1).

2. A gas collection device for atmospheric pollution detection according to claim 1, characterized in that: The sampling cage (1) comprises two parallel spaced connection plates (12), and a plurality of connection bars (11) arranged between the two connection plates (12). A plurality of the connection bars (11) are evenly spaced along the axis of the connection plates (12), and the two ends of the connection bars (11) are respectively connected to the two connection plates (12).

3. A gas collection device for atmospheric pollution detection according to claim 2, characterized in that: The barrier film (2) is a circular sheet structure as a whole, and the connecting strip (11) is a flexible structure.

4. A gas collection device for atmospheric pollution detection according to claim 3, characterized in that: At least one end of the connecting strip (11) is rotatably connected to the connecting disk (12), and the rotation axis of the connecting strip (11) is tangent to the circumference of the connecting disk (12).

5. A gas collection device for atmospheric pollution detection according to claim 3 or 4, characterized in that: A limiting surface (16) is provided in the connection groove (13), and the limiting surface (16) is used to prevent the middle position in the connection length direction from bending toward the inside of the sampling cage (1).

6. A gas collection device for atmospheric pollution detection according to claim 5, characterized in that: An air inlet hole (42) is provided on one of the connecting plates (12), and a blocking member (43) is provided on the other connecting plate (12). The blocking member (43) is spaced apart from the air inlet hole (42), and one end of the blocking member (43) can be inserted into the air inlet hole (42) to block the air inlet hole (42).

7. A gas collection device for atmospheric pollution detection according to claim 6, characterized in that: A limiting ring (44) and an elastic ring (45) are provided on the blocking member (43). The limiting ring (44) and the elastic ring (45) are arranged on the blocking member (43) at intervals along the length direction of the blocking member (43). The elastic ring (45) is located on a side close to the air inlet (42). The elastic ring (45) is made of elastic material and can pass through the air inlet (42). After passing through the air inlet (42), the elastic ring (45) can abut against the connecting disk (12).

8. A gas collection device for atmospheric pollution detection according to claim 7, characterized in that: An annular mounting groove (47) is provided on the side wall of the air inlet (42), an expansion sealing assembly (5) is provided in the mounting groove (47), and the expansion sealing assembly (5) includes a container (51), the container (51) is an annular structure corresponding to the mounting groove (47), the container (51) is made of elastic material, the interior of the container (51) is hollow, and a first agent and a second agent are provided inside the container (51), and the first agent and the second agent can generate gas when they come into contact.

9. A gas collection device for atmospheric pollution detection according to claim 8, characterized in that: The expansion sealing assembly (5) further includes a fragile part (52), which is arranged inside the container (51) and is hollow inside. The first agent or the second agent is arranged in the fragile part (52), and the fragile part (52) can be broken when subjected to pressure.

10. A gas collection device for atmospheric pollution detection according to claim 9, characterized in that: An extrusion piece (53) is provided on the connection disk (12) at a position corresponding to the accommodation piece (51). The extrusion piece (53) is slidably connected to the connection disk (12). When the blocking piece (43) is inserted into the air inlet hole (42), the extrusion piece (53) can be driven to approach the accommodation piece (51).

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