Self-locking filter membrane structure for air quality detection

Abstract

The invention relates to the technical field of environmental gas detection, and discloses a self-locking filter membrane structure for air quality detection, the self-locking filter membrane structure comprises a box body and an upper end cover fixed on the box body, the front side and the rear side of the box body are respectively provided with an inlet and an outlet, the self-locking filter membrane structure also comprises a collection part arranged in the box body, and the collection part comprises a plurality of groups of array collection assemblies, the inlet is communicated with the outlet. The self-locking structure achieves radial fixation of the filter membrane layer through mechanical extrusion, pollutant leakage in the switching process is avoided, a continuous pipe wall is formed through alternate closing of the first limiting ring, the second limiting ring and the through ring, gas bypass or overflow is eradicated, the detection accuracy is improved, multi-period independent detection is achieved, and the detection efficiency is improved. The array type filter membrane layer supports preset time switching, multi-period sampling can be completed through single-time installation, frequent disassembly is not needed, the filter membrane layer is automatically closed after use, cross contamination is avoided, and data independence of all periods is ensured.

Description

Technical Field

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

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

[0003] First, traditional filter membranes are mostly fixed with clips or adhesives to capture pollutants in the air, and then the filter membranes are removed for testing to determine the pollutants in the air. During the replacement or disassembly process, pollutants are easily leaked due to mechanical looseness or human operating errors.

[0004] Secondly, the air quality detection process is not just about testing the air in a certain period of time. The air quality in different environments at different times is also different. Therefore, the filter membrane needs to be removed and replaced regularly during the detection process in order to determine the pollutant content in the air at different times. Frequent installation and disassembly of the filter membrane will affect its sealing and stability, and also increase the workload of 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 technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a self-locking filter membrane structure for air quality detection, comprising a box body and an upper end cover fixed on the box body, the front and rear sides of the box body are respectively provided with an inlet and an outlet, and also includes a collecting part installed in the box body, the collecting part includes:

[0007] Multiple arrays of collecting components are located between the inlet and the outlet, and each of the multiple arrays of collecting components is in the form of two connected rings, one ring portion is used to form a tube body with the inlet and the outlet, and the other ring portion is used to install the filter membrane layer;

[0008] A shaft tube is fixed on the upper end cover, and multiple groups of the collecting components are arranged in series;

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

[0010] Furthermore, the collecting component includes an intermediate layer, the end surface of the intermediate layer is provided with a penetrating control hole, the control hole is sleeved with the shaft tube, two ends of the intermediate layer are respectively fixed with a through ring and a limiting ring 1, the filter membrane layer is installed on the outside of the limiting ring 1, and multiple groups of through rings and limiting rings 1 of the collecting component are respectively coaxially arranged;

[0011] The end of the linear motion of the driving unit controls the position replacement of the through ring and the limit ring of the corresponding collecting component, so as to realize that one group of through rings is coaxial with multiple groups of limit rings and one group of limit ring is coaxial with multiple groups of through rings.

[0012] Furthermore, a cone plate is fixed in the control hole of the middle layer, and a fan-shaped opening corresponding to the collecting components of the multiple arrays is opened on the outer wall of the shaft tube, and the cone plate extends into the fan-shaped opening;

[0013] The driving unit includes a cylinder and a motor, both of which are fixed to the upper end cover. An output shaft extending into the shaft tube is installed at the output end of the cylinder. The motor is used to control the rotation of the output shaft. A control layer is fixed to the end of the output shaft, and the outer wall of the control layer has a bayonet that cooperates with the cone plate.

[0014] Furthermore, a second limiting ring is fixed to the outer side of the first limiting ring, and the filter membrane layer is clamped between the first limiting ring and the second limiting ring.

[0015] Furthermore, the thickness of the middle layer is greater than the width of the fan-shaped opening, and the width of the cone plate is the same as the width of the fan-shaped opening.

[0016] Furthermore, the thickness of the limiting ring 1 and the limiting ring 2 are both half of the through ring, and the through ring fits with the adjacent through ring.

[0017] Furthermore, the diameters of the limiting ring 1 and the limiting ring 2 are the same as the diameter of the through ring.

[0018] Furthermore, a slide groove extends on the outer wall of the output shaft, and a gear 1 is sleeved on the outer wall of the output shaft. The inner side of the gear 1 cooperates with the slide groove. The gear 1 is rotatably installed on one side of the output end of the cylinder. The output end of the motor is fixed with a gear 2, and the gear 2 is meshed with the gear 1.

[0019] Furthermore, a plurality of groups of collecting components are sheathed on the outside with a shell, the shell is fixed to the upper end cover, and the axis of the shell coincides with the axis of the shaft tube.

[0020] Furthermore, a fan blade is installed inside the outlet 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] Fig. 9It is a schematic diagram of the structure of multiple groups of collecting components in tubular shape according to the present invention.

[0036] In the figure: 1. box body; 11. inlet; 12. outlet; 13. upper end cover; 2. collecting part; 21. collecting assembly; 211. middle layer; 212. through ring; 213. limit ring 1; 214. limit ring 2; 215. filter membrane layer; 216. control hole; 217. cone plate; 22. shaft tube; 221. fan-shaped mouth; 23. drive unit; 231. cylinder; 232. output shaft; 233. gear 1; 234. gear 2; 235. motor; 236. control layer; 237. bayonet; 24. outer shell. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 9 The present invention provides a technical solution: 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, the front and rear sides of the box body 1 are respectively provided with an inlet 11 and an outlet 12, and also includes a collecting part 2 installed in the box body 1, and the collecting part 2 includes:

[0039] Multiple arrays of collecting components 21 are located between the inlet 11 and the outlet 12. The multiple arrays of collecting components 21 are in the form of two connected rings, one ring portion is used to form a tube body with the inlet 11 and the outlet 12, and the other ring portion is used to install the filter membrane layer 215;

[0040] The shaft tube 22 is fixed on the upper end cover 13, and multiple groups of collecting components 21 are arranged in series;

[0041] The driving unit 23 is installed outside the housing 1 , and its linear motion is used to control the rotation state of the corresponding collecting assembly 21 along the shaft tube 22 .

[0042] The collecting assembly 21 comprises an intermediate layer 211, the end surface of the intermediate layer 211 is provided with a penetrating control hole 216, the control hole 216 is sleeved with the shaft tube 22, the two ends of the intermediate layer 211 are respectively fixed with a through ring 212 and a limiting ring 213, the filter membrane layer 215 is installed outside the limiting ring 213, and the through rings 212 and the limiting rings 213 of the multiple groups of collecting assemblies 21 are respectively coaxially arranged;

[0043] The linear motion end of the driving unit 23 controls the position replacement of the through ring 212 and the limiting ring 213 of the corresponding collecting component 21, so as to realize that one group of through rings 212 is coaxial with multiple groups of limiting rings 213 and one group of limiting rings 213 is coaxial with multiple groups of through rings 212.

[0044] Specifically, the fan blade drives the gas to enter from the inlet 11, flow through the tubular channel formed by multiple sets of through rings 212 connected in series, and finally discharge from the outlet 12. In the initial state, the through rings 212 of all the collecting components 21 are coaxially aligned to form a continuous gas flow channel to ensure that the gas flow passes through in a concentrated manner.

[0045] When it is necessary to switch the detection period, the drive unit 23 is started, and 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 cone plate 217 of the target collection component 21. The motor 235 drives the output shaft 232 to rotate 180°, driving the collection component 21 to rotate around the shaft tube 22, so that the filter layer 215 is switched from the position of the limit ring 1 213 and the limit ring 214 to the tubular channel formed by the through ring 212. At this time, the filter layer 215 is exposed to the airflow to intercept pollutants.

[0046] A cone plate 217 is fixed in the control hole 216 of the middle layer 211, and a fan-shaped opening 221 corresponding to the multiple arrays of collecting components 21 is opened on the outer wall of the shaft tube 22, and the cone plate 217 extends into the fan-shaped opening 221;

[0047] The driving unit 23 includes a cylinder 231 and a motor 235, both of which are fixed to the upper end cover 13. An output shaft 232 extending into the shaft tube 22 is installed at the output end of the cylinder 231. 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. The outer wall of the control layer 236 has a bayonet 237 that cooperates with the cone plate 217.

[0048] A second limiting ring 214 is also fixed to 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 .

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

[0050] The thickness of the first limiting ring 213 and the second limiting ring 214 are both half of the through ring 212 , and the through rings 212 fit closely with the adjacent through rings 212 .

[0051] Specifically, the filter membrane layer 215 is clamped by the limiting ring 1 213 and the limiting ring 214, and its total thickness is slightly larger than the distance between adjacent through rings 212. After rotation, it is squeezed by the collecting components 21 on both sides to form radial self-locking, ensuring that the filter membrane layer 215 fits tightly against the channel wall.

[0052] The non-working filter membrane layer 215 rotates back to the original position along with the limiting ring 1 213 and the limiting ring 214 and is closed by the tubular channel formed by the adjacent limiting ring 1 213 and the limiting ring 214 to avoid secondary contact with pollutants.

[0053] It should be noted that even if the tubular channel formed by multiple sets of limit rings 1 213 and limit rings 214 has a filter membrane layer 215 inside, the change in thickness is limited, thereby avoiding a large increase in the width of the tubular channel formed by multiple sets of limit rings 1 213 and limit rings 214, which may cause deformation that is difficult to recover.

[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 slide groove extends on the outer wall of the output shaft 232, and a gear 233 is sleeved on the outer wall of the output shaft 232. The inner side of the gear 233 cooperates with the slide groove. The 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 gear 234, and the gear 234 is meshed with the gear 1 233.

[0056] It should be noted that the cylinder 231 and the motor 235 will repeat the operation at a preset time interval, and the multiple collection components 21 will also repeat the operation at a preset time interval, switching the filter membrane layers 215 of different collection components 21 to the detection position one by one, so as to achieve independent sampling in multiple time periods. The used filter membrane layer 215 remains in a closed state until manual extraction and 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, which supports frequent start and stop at preset time intervals such as every hour or every 30 minutes. The motor 235 is a servo motor, which ensures the accuracy of each 180° rotation of the output shaft 232 to avoid misalignment of the filter membrane layer 215 or sealing failure due to angle deviation.

[0058] The outer side of the multiple collection components 21 is provided with a shell 24, which is fixed to the upper end cover 13, and the axis of the shell 24 coincides with the axis of the shaft tube 22. The shell 24 has a protective effect to prevent the filter membrane layer 215 at the end from being contaminated by the external environment.

[0059] The outlet 12 is internally provided with a fan blade for driving the gas to enter from the inlet 11 and exit from the outlet 12 . The fan blade generates a negative pressure, so that the through loop 212 formed in the pipeline can continuously inhale air, generating an air flow through a filter membrane layer 215 .

[0060] The working principle of the present invention is as follows: during operation, 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 the multiple sets of collecting components 21 form a tubular shape, and the multiple sets of limiting rings 1 213 and limiting rings 214 also form a tubular shape. The tubular shape formed by the multiple sets of through rings 212 is connected to the inlet 11 and the outlet 12, so that the gas passes through the multiple sets of through rings 212 to avoid spillage. Under the action of the cylinder 231, the output shaft 232 can be driven to extend outward. The motor 235 is a servo motor, which can drive the rotation of the output shaft 232. When the bayonet 237 of the control layer 236 is locked with the cone plate 217 of a group of collection components 21, the output shaft 232 rotates to realize the rotation of the corresponding group of collection components 21. The through ring 212 rotates 180 degrees to replace the position of the limit ring 1 213 and the limit ring 2 214. There is a group of limit rings 1 213 and limit rings 2 214 in the multiple groups of tubular through rings 212, and there is a group of through rings 212 in the multiple groups of tubular limit rings 1 213 and limit rings 2 214. 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 rotate the next group of collection components 21.

[0061] Based on the above, the tubular multiple groups of through rings 212 have a group of limit rings 1 213 and a limit ring 214, that is, the multiple groups of through rings 212 have a filter membrane layer 215, which can adhere pollutants in the air to the filter membrane layer 215. Different filter membrane layers 215 can be used in different time periods to accurately detect the air quality in different time periods.

[0062] Since the thickness of the limiting ring 1 213 and the limiting ring 214 are both half of that of the through ring 212, the through rings 212 fit closely with the adjacent through rings 212, and the tubular shape formed by the multiple groups of through rings 212 prevents gas from leaking out. When the positions of the through rings 212, the limiting ring 1 213 and the limiting ring 214 in a group of collecting components 21 are replaced, the tubular shape with a closed outer wall is maintained, thereby ensuring accurate gas detection. It should be noted that the filter membrane layer 215 clamped in the limiting ring 1 213 and the limiting ring 214 will be in a squeezed state. The reason is that the thickness of the limiting ring 1 213 and the limiting ring 214 is half of the through ring 212, and the through ring 212 fits with the adjacent through ring 212, so the thickness of the limiting ring 1 213 and the limiting ring 214 plus the filter membrane layer 215 will increase. Therefore, when the limiting ring 1 213 and the limiting ring 214 rotate or not, they can be squeezed by the adjacent collecting component 21, forming a self-locking for the filter membrane layer 215.

[0063] When the filter membrane layer 215 clamped by the limiting ring 1 213 and the limiting ring 214 coincides with the axis of the multiple sets of through rings 212, the pollutants can be collected. Then the filter membrane layer 215 is reset to coincide with the multiple sets of limiting rings 1 213 and the limiting ring 214, and the front and rear positions are blocked by the adjacent filter membrane layer 215. At the same time, the multiple sets of limiting rings 1 213 and the limiting ring 214 are fitted together to form a tubular shape, which can seal the filter membrane layer 215 at the corresponding position to avoid contact with the pollutants again, ensure contact with the pollutants within a certain period of time, and detect the air quality within this period of time.

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

[0065] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in 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 box body (1) has an inlet (11) and an outlet (12) on the front and rear sides respectively, and is characterized in that: It also includes a collecting part (2) installed in the box body (1), and the collecting part (2) includes: A plurality of arrays of collecting components (21) are located between the inlet (11) and the outlet (12), wherein the plurality of collecting components (21) are in the form of two connected rings, one ring portion being used to form a tube body with the inlet (11) and the outlet (12), and the other ring portion being used to mount a filter membrane layer (215); The shaft tube (22) is fixed on the upper end cover (13) and multiple groups of the collecting components (21) are arranged in series; The driving unit (23) is installed outside the box body (1), and its linear movement is used to control the rotation state of the corresponding collection component (21) along the shaft tube (22).

2. The self-locking filter membrane structure for air quality detection according to claim 1 is characterized in that: The collecting component (21) comprises an intermediate layer (211), the end surface of the intermediate layer (211) is provided with a penetrating control hole (216), the control hole (216) is sleeved with the shaft tube (22), two ends of the intermediate layer (211) are respectively fixed with a through ring (212) and a limiting ring (213), the filter membrane layer (215) is mounted on the outside of the limiting ring (213), and a plurality of groups of through rings (212) and limiting rings (213) of the collecting component (21) are respectively coaxially arranged; The linearly moving end of the driving unit (23) controls the position replacement of the through ring (212) and the limiting ring 1 (213) of the corresponding collecting component (21), thereby achieving coaxiality between one group of through rings (212) and multiple groups of limiting rings 1 (213), and coaxiality between one group of limiting rings 1 (213) and multiple groups of through rings (212).

3. The self-locking filter membrane structure for air quality detection according to claim 2 is characterized in that: A cone plate (217) is fixed in the control hole (216) of the middle layer (211); a sector-shaped opening (221) corresponding to the plurality of arrays of collecting components (21) is formed on the outer wall of the shaft tube (22); and the cone plate (217) extends into the sector-shaped opening (221); The drive unit (23) comprises a cylinder (231) and a motor (235), wherein the cylinder (231) and the motor (235) are both fixed to the upper end cover (13), an output shaft (232) extending into the shaft tube (22) is mounted at the output end of the cylinder (231), 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 an outer wall of the control layer (236) has a bayonet (237) that cooperates with the cone plate (217).

4. The self-locking filter membrane structure for air quality detection according to claim 2 is characterized in that: A second limiting ring (214) is also 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).

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

6. The self-locking filter membrane structure for air quality detection according to claim 4 is characterized in that: The thickness of the first limiting ring (213) and the second limiting ring (214) are both half of the thickness of the through ring (212), and the through ring (212) fits closely with the adjacent through ring (212).

7. The self-locking filter membrane structure for air quality detection according to claim 4 is characterized in that: 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).

8. The self-locking filter membrane structure for air quality detection according to claim 3 is characterized in that: A slide groove extends from the outer wall of the output shaft (232), and a gear 1 (233) is sleeved on the outer wall of the output shaft (232). The inner side of the gear 1 (233) cooperates with the slide groove. The gear 1 (233) is rotatably mounted on one side of the output end of the cylinder (231). The output end of the motor (235) is fixed with a gear 2 (234), and the gear 2 (234) meshes with the gear 1 (233).

9. The self-locking filter membrane structure for air quality detection according to claim 2, characterized in that: A shell (24) is provided on the outside of the plurality of collection components (21); the shell (24) is fixed to the upper end cover (13); and the axis of the shell (24) coincides with the axis of the shaft tube (22).

10. The self-locking filter membrane structure for air quality detection according to claim 1, characterized in that: The outlet (12) is internally provided with a fan blade for driving the gas to enter from the inlet (11) and exit from the outlet (12).

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