A self-locking filter membrane structure for air quality detection

Abstract

The present invention relates to the technical field of environmental gas detection, and discloses a self-locking filter membrane structure for air quality detection, including a box body and an upper end cover fixed on the box body, the front and rear sides of the box body respectively have an inlet and an outlet, and also include a collecting part installed in the box body, the collecting part includes: a plurality of array collection components, located between the inlet and the outlet. The present invention has anti-leakage and high sealing properties, the self-locking structure realizes radial fixation of the filter membrane layer through mechanical extrusion to avoid leakage of pollutants during the switching process, the continuous tube wall formed by the alternating closure of the limit ring 1 and the limit ring 2 and the through ring prevents gas bypass or spillage, improves detection accuracy, and realizes independent detection in multiple time periods, the array filter membrane layer supports preset time switching, and multiple time period sampling can be completed with a single installation without frequent disassembly, and the filter membrane layer is automatically closed after use to avoid cross contamination and ensure the independence of data in each time period.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental gas detection, and particularly to a self-locking filter membrane structure for air quality detection. Background Art

[0002] With the acceleration of the industrialization and urbanization processes, the importance of air quality detection technology has become increasingly prominent. As the core component of the detection equipment, the sealing performance, stability and safety of the filter membrane are directly related to the accuracy of the detection data and the health of the operators. However, the traditional filter membrane structure still has the following significant defects in technical implementation and application scenarios:

[0003] Firstly, traditional filter membranes are mostly fixed by buckles or adhesives to capture pollutants in the air, and then the filter membranes are removed for detection to determine the pollutants in the air. During the replacement or disassembly process, pollutant leakage is likely to occur due to mechanical looseness or human operation errors.

[0004] Secondly, during the air quality detection process, not only the air in a certain period is detected, but the air quality in different time environments is also different. Therefore, during the detection process, the filter membrane needs to be regularly removed and replaced to determine the pollutant content in the air at different times. Frequently installing and disassembling the filter membrane will affect its sealing performance and stability, and at the same time increase the labor intensity of the operators. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-locking filter membrane structure for air quality detection to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: A self-locking filter membrane structure for air quality detection, including a box body and an upper end cover fixed on the box body. The front and rear sides of the box body respectively have an inlet and an outlet. It further includes a collection part installed in the box body, and the collection part includes:

[0007] Multiple groups of arrayed collection components, located between the inlet and the outlet. Each group of the collection components is in the form of two connected rings. One ring part is used to form a pipe body with the inlet and the outlet, and the other ring part is used to install the filter membrane layer;

[0008] A shaft tube, fixed on the upper end cover, and threading multiple groups of the collection components;

[0009] A driving unit, installed outside the box body, and its linear motion is used to control the rotation state of the corresponding collection component along the shaft tube.

[0010] Further, the collection component includes an intermediate layer. A through control hole is provided on the end face of the intermediate layer. The control hole is sleeved with a shaft tube. A through-ring and a first limiting ring are respectively fixed at both ends of the intermediate layer. The filter membrane layer is installed outside the first limiting ring. The through-rings and the first limiting rings of multiple groups of the collection components are coaxially arranged respectively;

[0011] The end of the driving unit that moves linearly controls the position replacement of the through-ring and the first limiting ring of the corresponding collection component, so as to realize the coaxiality of one through-ring and multiple first limiting rings and the coaxiality of one first limiting ring and multiple through-rings.

[0012] Further, a conical plate is fixed in the control hole of the intermediate layer. A fan-shaped opening corresponding to multiple groups of arrayed collection components is provided on the outer wall of the shaft tube. The conical plate extends into the fan-shaped opening;

[0013] The driving unit includes a cylinder and a motor. Both the cylinder and the motor are fixed to the upper end cover. The output end of the cylinder is provided with an output shaft extending into the shaft tube. The motor is used to control the rotation of the output shaft. A control layer is fixed at the end of the output shaft. A bayonet matching the conical plate is provided on the outer wall of the control layer.

[0014] Further, a second limiting ring is also fixed outside the first limiting ring. The filter membrane layer is clamped between the first limiting ring and the second limiting ring.

[0015] Further, the thickness of the intermediate layer is greater than the width of the fan-shaped opening. The width of the conical plate is the same as the width of the fan-shaped opening.

[0016] Further, the thicknesses of both the first limiting ring and the second limiting ring are half of that of the through-ring. The through-ring is in contact with the adjacent through-ring.

[0017] Further, the diameters of both the first limiting ring and the second limiting ring are the same as that of the through-ring.

[0018] Further, a chute extends on the outer wall of the output shaft. A first gear is sleeved on the outer wall of the output shaft. The inner side of the first gear is matched with the chute. The first gear is rotatably installed on one side of the output end of the cylinder. A second gear is fixed to the output end of the motor. The second gear meshes with the first gear.

[0019] Further, an outer shell is sleeved outside multiple groups of the collection components. The outer shell is fixed to the upper end cover. The axis of the outer shell coincides with the axis of the shaft tube.

[0020] Further, a fan blade is installed inside the outlet, which is used to drive the gas to enter from the inlet and exit from the outlet.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0022] 1. It has anti-leakage and high sealing performance. The self-locking structure realizes radial fixation of the filter membrane layer through mechanical extrusion to avoid leakage of pollutants during the switching process. The continuous tube wall formed by the alternating closure of the limit ring 1 and the limit ring 2 and the through ring prevents gas bypass or spillage and improves detection accuracy.

[0023] 2. Realize independent detection in multiple time periods. The array filter membrane layer supports preset time switching. Multiple time period sampling can be completed with a single installation without frequent disassembly. The filter membrane layer is automatically closed after use to avoid cross contamination and ensure the independence of data in each time period.

[0024] 3. Easy to operate and low maintenance, the drive unit realizes fully automatic switching, reduces manual intervention, and the modular collection component supports rapid replacement of the filter membrane layer, reducing operation complexity and labor intensity.

[0025] 4. It has adaptability to multiple environments. The continuous tube wall formed by the alternating closure of limit ring 1, limit ring 2 and the through ring can withstand the impact of high-flow airflow. The fan drive ensures efficient gas circulation and is suitable for continuous monitoring in industrial high-pollution environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of a partial sectional structure of a box body of the present invention;

[0029] Figure 3 This is a schematic diagram of the separation structure of the collecting assembly and the box body of the present invention;

[0030] Figure 4 It is a schematic diagram of a set of collecting components and axle tube structures of the present invention;

[0031] Figure 5 The present invention Figure 4 A is a schematic diagram of the partially enlarged structure of the middle part;

[0032] Figure 6 It is a schematic diagram of the decomposed structure of a set of collection components of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of a group of collection components and a control layer of the present invention;

[0034] Figure 8 This is a schematic diagram of a half-section structure of the middle layer of a collection assembly of the present invention;

[0035] Figure 9This is a schematic structural diagram of the multi-group collection components of the present invention in a tubular shape.

[0036] In the figure: 1. Box body; 11. Inlet; 12. Outlet; 13. Upper end cover; 2. Collection part; 21. Collection component; 211. Intermediate layer; 212. Through ring; 213. Limiting ring 1; 214. Limiting ring 2; 215. Filter membrane layer; 216. Control hole; 217. Cone plate; 22. Shaft tube; 221. Sector-shaped opening; 23. Driving unit; 231. Cylinder; 232. Output shaft; 233. Gear 1; 234. Gear 2; 235. Motor; 236. Control layer; 237. Bayonet; 24. Outer shell. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1-9 , the present invention provides a technical solution: a self-locking filter membrane structure for air quality detection, including a box body 1 and an upper end cover 13 fixed on the box body 1. The front and rear sides of the box body 1 are respectively provided with an inlet 11 and an outlet 12. It also includes a collection part 2 installed in the box body 1. The collection part 2 includes:

[0039] Multiple groups of arrayed collection components 21, located between the inlet 11 and the outlet 12. Multiple groups of collection components 21 are both in the form of two connected rings. One ring part is used to form a pipe body with the inlet 11 and the outlet 12, and the other ring part is used to install the filter membrane layer 215;

[0040] A shaft tube 22, fixed on the upper end cover 13, threading multiple groups of collection components 21;

[0041] A driving unit 23, installed outside the box body 1, and its linear motion is used to control the rotation state of the corresponding collection component 21 along the shaft tube 22.

[0042] The collection component 21 includes an intermediate layer 211. A through control hole 216 is opened on the end face of the intermediate layer 211. The control hole 216 is sleeved with the shaft tube 22. A through ring 212 and a limiting ring 1 213 are respectively fixed at both ends of the intermediate layer 211. The filter membrane layer 215 is installed outside the limiting ring 1 213. The through rings 212 and the limiting rings 1 213 of multiple groups of collection components 21 are coaxially arranged;

[0043] The end control that drives the linear movement of the driving unit 23 replaces the positions of the through-ring 212 and the first limiting ring 213 corresponding to the collection assembly 21, so as to achieve the coaxiality of a group of through-rings 212 and multiple groups of the first limiting rings 213, and the coaxiality of a group of the first limiting rings 213 and multiple groups of through-rings 212.

[0044] Specifically, the fan blade drives the gas to enter from the inlet 11, flows through the tubular channel formed by connecting multiple groups of through-rings 212 in series, and finally discharges from the outlet 12. In the initial state, the through-rings 212 of all the collection assemblies 21 are coaxially aligned to form a continuous gas flow channel, ensuring that the air flow passes through concentratedly.

[0045] When it is necessary to switch the detection period, the driving unit 23 is started, the cylinder 231 pushes the output shaft 232 to move axially, so that the bayonet 237 of the control layer 236 is aligned with the conical plate 217 of the target collection assembly 21. The motor 235 drives the output shaft 232 to rotate 180°, driving the collection assembly 21 to rotate around the shaft tube 22, so that the filter membrane layer 215 is switched from the positions of the first limiting ring 213 and the second limiting ring 214 to the tubular channel formed by the through-ring 212. At this time, the filter membrane layer 215 is exposed to the air flow to intercept pollutants.

[0046] A conical plate 217 is fixed in the control hole 216 of the intermediate layer 211, and a fan-shaped opening 221 corresponding to multiple groups of arrayed collection assemblies 21 is formed on the outer wall of the shaft tube 22, and the conical plate 217 extends into the fan-shaped opening 221;

[0047] The driving unit 23 includes a cylinder 231 and a motor 235. The cylinder 231 and the motor 235 are both fixed to the upper end cover 13. The output end of the cylinder 231 is provided with an output shaft 232 extending into the shaft tube 22. The motor 235 is used to control the rotation of the output shaft 232. A control layer 236 is fixed to the end of the output shaft 232, and a bayonet 237 that cooperates with the conical plate 217 is provided on the outer wall of the control layer 236.

[0048] A second limiting ring 214 is further fixed to the outside of the first limiting ring 213, and the filter membrane layer 215 is clamped between the first limiting ring 213 and the second limiting ring 214.

[0049] The thickness of the intermediate layer 211 is greater than the width of the fan-shaped opening 221, and the width of the conical plate 217 is the same as the width of the fan-shaped opening 221, so that the intermediate layer 211 is stably sleeved on the outer wall of the shaft tube 22, and the conical plate 217 limits the position of the intermediate layer 211 so that it can only rotate.

[0050] The thicknesses of both the first limiting ring 213 and the second limiting ring 214 are half of that of the through-ring 212, and the through-ring 212 is in contact with the adjacent through-ring 212.

[0051] Specifically, the filter membrane layer 215 is clamped by the first limiting ring 213 and the second limiting ring 214, and its total thickness is slightly greater than the distance between adjacent through rings 212. After rotation, it is squeezed by the two-sided collection components 21, forming radial self-locking to ensure that the filter membrane layer 215 is closely attached to the channel wall.

[0052] In the non-working state, the filter membrane layer 215 rotates back to its original position with the first limiting ring 213 and the second limiting ring 214, and is closed by the tubular channel formed by the adjacent first limiting ring 213 and the second limiting ring 214 to avoid secondary contact with pollutants.

[0053] It should be noted that even if the filter membrane layer 215 is provided inside the tubular channels formed by multiple groups of the first limiting rings 213 and the second limiting rings 214, the change in thickness is limited, avoiding large-scale increase in the width of the tubular channels formed by multiple groups of the first limiting rings 213 and the second limiting rings 214 and resulting in irreversible deformation.

[0054] The diameters of the first limiting ring 213 and the second limiting ring 214 are the same as the diameter of the through ring 212.

[0055] A chute extends on the outer wall of the output shaft 232. A first gear 233 is sleeved on the outer wall of the output shaft 232. The inner side of the first gear 233 is matched with the chute. The first gear 233 is rotatably installed on one side of the output end of the cylinder 231. A second gear 234 is fixed to the output end of the motor 235, and the second gear 234 meshes with the first gear 233.

[0056] It should be noted that the cylinder 231 and the motor 235 will repeat operations at preset time intervals, and multiple groups of collection components 21 will also repeat operations at preset time intervals, gradually switching the filter membrane layers 215 of different collection components 21 to the detection position to achieve multi-period independent sampling. The used filter membrane layer 215 remains in a closed state until manually extracted for detection.

[0057] It should also be noted that the cylinder 231 is a servo cylinder with position feedback or a cylinder controlled by a high-precision solenoid valve, supporting frequent start and stop at preset time intervals such as every hour or every 30 minutes. The motor 235 is a servo motor to ensure the accuracy of rotating the output shaft 232 by 180° each time, avoiding misalignment or sealing failure of the filter membrane layer 215 due to angle deviation.

[0058] A housing 24 is sleeved outside multiple groups of collection components 21. The housing 24 is fixed to the upper end cover 13. The axis of the housing 24 coincides with the axis of the shaft tube 22. The housing 24 plays a protective role to prevent the filter membrane layer 215 at the outermost end from being polluted by the external environment.

[0059] A fan blade is installed inside the outlet 12 to drive the gas to enter from the inlet 11 and exit from the outlet 12. The fan blade generates a negative pressure effect, enabling the through rings 212 formed in a pipeline shape to continuously suck air and generate an air flow through a layer of filter membrane layer 215.

[0060] Working principle of the present invention: During the working process, the fan blade drives the gas to enter from the inlet 11 and then move out from the outlet 12. The through-rings 212 in multiple groups of collection components 21 form a tube, and multiple groups of first limit rings 213 and second limit rings 214 also form a tube. The tubes formed by multiple groups of through-rings 212 are communicated with the inlet 11 and the outlet 12, so that the gas passes through multiple groups of through-rings 212 to avoid spillage. Under the action of the cylinder 231, the output shaft 232 can be driven to extend outwards. The motor 235 is a servo motor and can drive the rotation of the output shaft 232. When the bayonet 237 of the control layer 236 is clamped with the conical plate 217 of a group of collection components 21, the output shaft 232 rotates to drive the corresponding group of collection components 21 to rotate. After rotating 180°, the positions of the through-ring 212, the first limit ring 213 and the second limit ring 214 are replaced. Among the multiple groups of through-rings 212 forming a tube, there is a first limit ring 213 and a second limit ring 214, and among the multiple groups of first limit rings 213 and second limit rings 214 forming a tube, there is a through-ring 212. It should be noted that the cylinder 231 and the motor 235 can control the corresponding group of collection components 21 to reset, and then further cause the next group of collection components 21 to rotate.

[0061] Based on the above, among the multiple groups of through-rings 212 forming a tube, there is a first limit ring 213 and a second limit ring 214, that is, there is a filter membrane layer 215 among the multiple groups of through-rings 212, which can adhere the pollutants in the air to this filter membrane layer 215. Different filter membrane layers 215 can be used at different time periods to accurately detect the air quality at different time periods.

[0062] Since the thicknesses of both the first limit ring 213 and the second limit ring 214 are half of that of the through-ring 212, the through-ring 212 is attached to the adjacent through-ring 212. The tubes formed by multiple groups of through-rings 212 prevent gas spillage. When the positions of the through-ring 212, the first limit ring 213 and the second limit ring 214 in a group of collection components 21 are replaced, the outer wall of the tube remains closed, ensuring the accuracy of gas detection. It should be noted that the filter membrane layer 215 clamped between the first limit ring 213 and the second limit ring 214 will be in a squeezed state because the thicknesses of both the first limit ring 213 and the second limit ring 214 are half of that of the through-ring 212, and the through-ring 212 is attached to the adjacent through-ring 212. Then the thickness will increase after adding the first limit ring 213, the second limit ring 214 and the filter membrane layer 215. Therefore, no matter whether the first limit ring 213 and the second limit ring 214 rotate or not, they can be squeezed by the adjacent collection components 21 to form a self-locking for the filter membrane layer 215.

[0063] When the filter membrane layer 215 clamped by the first limiting ring 213 and the second limiting ring 214 coincides with the axes of multiple through rings 212, pollutants can be collected. After that, the filter membrane layer 215 resets and coincides with the multiple first limiting rings 213 and the second limiting rings 214, and its front and back positions are blocked by the adjacent filter membrane layers 215. At the same time, the multiple first limiting rings 213 and the second limiting rings 214 fit together to form a tube, which can seal the filter membrane layer 215 at the corresponding position to avoid contacting pollutants again, ensure contacting pollutants within a certain period of time, and detect the air quality during this period of time.

[0064] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0065] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-locking filter membrane structure for air quality detection, comprising a box body (1) and an upper end cover (13) fixed on the box body (1), wherein the front and rear sides of the box body (1) are respectively provided with an inlet (11) and an outlet (12), and it is characterized in that, It also includes a collection part (2) installed in the box body (1), and the collection part (2) includes: Multiple groups of arrayed collection components (21), located between the inlet (11) and the outlet (12). Multiple groups of the collection components (21) are both in the form of two connected rings. One ring part is used to form a pipe body with the inlet (11) and the outlet (12), and the other ring part is used to install the filter membrane layer (215); A shaft tube (22), fixed on the upper end cover (13), threading multiple groups of the collection components (21); A driving unit (23), installed outside the box body (1), whose linear motion is used to control the rotation state of the corresponding collection component (21) along the shaft tube (22); The collection component (21) includes an intermediate layer (211), and both ends of the intermediate layer (211) are respectively fixed with a through ring (212) and a first limiting ring (213); A second limiting ring (214) is further fixed on the outer side of the first limiting ring (213), and the filter membrane layer (215) is clamped between the first limiting ring (213) and the second limiting ring (214); The thicknesses of both the first limiting ring (213) and the second limiting ring (214) are half of that of the through ring (212), and the through ring (212) is in contact with the adjacent through ring (212).

2. The self-locking filter membrane structure for air quality detection according to claim 1, wherein: A through control hole (216) is opened on the end face of the intermediate layer (211), and the control hole (216) is sleeved with the shaft tube (22). The filter membrane layer (215) is installed on the outer side of the first limiting ring (213), and the through rings (212) and the first limiting rings (213) of multiple groups of the collection components (21) are coaxially arranged respectively; The end of the linear motion of the driving unit (23) controls the position replacement of the through ring (212) and the first limiting ring (213) of the corresponding collection component (21), so as to realize the coaxiality of one group of through rings (212) and multiple groups of first limiting rings (213) and the coaxiality of one group of first limiting rings (213) and multiple groups of through rings (212).

3. The self-locking filter membrane structure for air quality detection according to claim 2, wherein: A conical plate (217) is fixed in the control hole (216) of the intermediate layer (211), and fan-shaped openings (221) corresponding to multiple groups of arrayed collection components (21) are opened on the outer wall of the shaft tube (22), and the conical plate (217) extends into the fan-shaped openings (221); The driving unit (23) includes a cylinder (231) and a motor (235). Both the cylinder (231) and the motor (235) are fixed to the upper end cover (13). The output end of the cylinder (231) is installed with an output shaft (232) extending into the shaft tube (22). The motor (235) is used to control the rotation of the output shaft (232). A control layer (236) is fixed at the end of the output shaft (232), and a bayonet (237) matching the conical plate (217) is provided on the outer wall of the control layer (236).

4. The self-locking filter membrane structure for air quality detection according to claim 3, characterized in that: The thickness of the intermediate layer (211) is greater than the width of the fan-shaped opening (221), and the width of the conical plate (217) is the same as the width of the fan-shaped opening (221).

5. The self-locking filter membrane structure for air quality detection according to claim 1, characterized in that: The diameters of both the first limiting ring (213) and the second limiting ring (214) are the same as the diameter of the through ring (212).

6. The self-locking filter membrane structure for air quality detection according to claim 3, characterized in that: A chute extends on the outer wall of the output shaft (232). A first gear (233) is sleeved on the outer wall of the output shaft (232). The inner side of the first gear (233) is matched with the chute. The first gear (233) is rotatably installed on one side of the output end of the cylinder (231). The output end of the motor (235) is fixed with a second gear (234), and the second gear (234) meshes with the first gear (233).

7. The self-locking filter membrane structure for air quality detection according to claim 2, characterized in that: A housing (24) is sleeved outside multiple groups of the collection components (21). The housing (24) is fixed to the upper end cover (13). The axis of the housing (24) coincides with the axis of the shaft tube (22).

8. The self-locking filter membrane structure for air quality detection according to claim 1, wherein: A fan blade is installed inside the outlet (12) for driving gas to enter from the inlet (11) and exit from the outlet (12).

Images