Automatic filter membrane replacing device

Abstract

The utility model discloses an automatic filter membrane replacing device which comprises a feeding mechanism, a filtering mechanism, a membrane pushing mechanism and a recycling mechanism, the feeding mechanism comprises a membrane clamp barrel used for containing a membrane clamp to be filtered, a membrane receiving disc used for receiving the membrane clamp output from the membrane clamp barrel and a barrel pressing disc used for pressing the membrane clamp barrel on the membrane receiving disc; a film passing channel through which a film clamp can pass is formed between the film clamp barrel and the film receiving disc; the filtering mechanism comprises a filtering lower platform for placing the membrane clamp and a filtering upper platform for pressing the membrane clamp on the filtering lower platform for gas filtering; the membrane pushing mechanism comprises a driving motor and a membrane pushing plate fixed to the output end of the driving motor, and the membrane pushing plate is arranged in the direction facing the membrane passing channel and used for horizontally pushing a membrane clamp to be filtered on the membrane receiving disc to the filtering lower platform to be replaced; and the recycling mechanism is used for collecting the membrane clamps replaced from the filtering mechanism. The device is small in occupied space, capable of achieving automatic film changing and high in film changing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ambient air quality detection technology, and in particular, to an automatic filter membrane replacement device. Background Technology

[0002] Detecting ambient air composition requires pre-filtering to remove dust and impurities from the air to ensure accurate results. Currently, pre-filters are commonly used for this purpose. The core component of these pre-filters is the filter membrane. The appropriate membrane pore size is selected based on the instrument's testing requirements. The filter removes particulate matter from the atmospheric sample, protecting the measuring equipment. However, after a period of operation, impurities filtered onto the membrane can accumulate and clog it. Furthermore, the filter membrane has a limited lifespan and requires periodic replacement.

[0003] In existing technologies, filter membrane replacement is typically done manually. However, filter membranes require dedicated clamps, with one clamp holding one membrane. Manual replacement necessitates operators changing the membranes according to usage frequency, which is time-consuming and labor-intensive. The replacement process is lengthy, inconsistent, and prone to leaks, contamination, and damage. While air filter membrane replacement devices are also used, these devices are space-consuming, require numerous motors and linear modules for moving the old and new membranes, and have complex structures and control logic. This makes replacement difficult and inefficient, and the procedures for recycling old and storing new membranes are also complex. Utility Model Content

[0004] This invention provides an automatic filter membrane replacement device to solve the technical problems of large space occupation and complex membrane replacement operation in the prior art.

[0005] According to one aspect of the present invention, an automatic filter membrane replacement device is provided, comprising: a feeding mechanism, including a membrane clamping bucket for accommodating a membrane clamp to be filtered, a membrane receiving plate for receiving a membrane clamp output from the membrane clamping bucket, and a pressing plate for pressing the membrane clamping bucket onto the membrane receiving plate, wherein a membrane passage is formed between the membrane clamping bucket and the membrane receiving plate, through which a membrane clamp height can pass.

[0006] The filtration mechanism includes a lower filtration platform for placing a membrane clamp and an upper filtration platform for pressing the membrane clamp onto the lower filtration platform. A gas sample passes sequentially through the upper filtration platform, the membrane clamp, and the lower filtration platform for gas filtration.

[0007] The membrane pushing mechanism includes a drive motor and a membrane pushing plate fixed to the output end of the drive motor. The membrane pushing plate is set in the direction of the membrane channel and is used to horizontally push the membrane clamp to be filtered on the membrane receiving tray to the lower filter platform for replacement.

[0008] The recycling mechanism, located on one side of the filtration unit, is used to collect the membrane clips that have been replaced from the filtration unit.

[0009] Furthermore, the automatic filter membrane replacement device also includes a frame, inside which is a worktable for installing the feeding mechanism, the filtering mechanism, and the membrane pushing mechanism, while the recycling mechanism is installed on the outside of the frame.

[0010] Furthermore, the pressure plate includes a pressure plate disposed above the membrane clamping barrel, a spring, and shoulder screws for fixing the spring to the pressure plate;

[0011] The pressure plate has a limiting groove for radially limiting the membrane clamping barrel.

[0012] Furthermore, the membrane clamp includes a membrane storage chamber, radial limiting plates arranged on both sides of the membrane passage, and an axial limiting plate fixed to the bottom of the radial limiting plates. The radial limiting plates are arranged along the axial direction of the membrane storage chamber and are fixedly connected to the bottom of the membrane storage chamber. The distance between the axial limiting plate and the membrane storage chamber is adapted to the height of the membrane passage.

[0013] The radial limiting plate is located on the side of the film storage tank near the film pushing mechanism.

[0014] Furthermore, a limiting block is fixed on the upper end face of the film receiving tray to abut against the bottom of the film storage tank, and the height of the limiting block is adapted to the height of the film passage.

[0015] The film receiving plate has grooves on both sides for engaging with the axial limiting plate.

[0016] Furthermore, the membrane clamp includes a membrane clamping disc, a filter membrane clamped in the membrane clamping disc, and a first sealing ring for pressing the outer periphery of the filter membrane into the membrane clamping disc. The first sealing ring is arranged above the filter membrane and embedded in the membrane clamping disc. A first slot is provided in the membrane clamping disc for engaging with the upper platform of the filter. The first slot is arranged above the first sealing ring.

[0017] The outer wall of the end of the membrane disc away from the filter membrane has a chamfer along the circumference.

[0018] Furthermore, the upper filter platform includes a pressing motor fixed on the frame and a membrane pressing block fixed to the output end of the pressing motor. The membrane pressing block has a second slot for locking the membrane plate at one end facing the lower filter platform.

[0019] The pressure plate has a chamfer that corresponds to the film clamping plate.

[0020] Furthermore, a second sealing ring is provided between the membrane pressing block and the lower filter platform. The second sealing ring is radially arranged on the outer periphery of the membrane clamp and embedded in the membrane pressing block.

[0021] Furthermore, the recycling mechanism includes a recycling bin fixed to the outer wall of the frame, a baffle movably installed at the bottom of the recycling bin, and a limiting plate arranged below the baffle. The limiting plate is arranged on both sides of the recycling bin and fixedly connected to the recycling bin, and a membrane outlet is formed between the two limiting plates to allow the membrane clamp to pass through.

[0022] Furthermore, a recycling channel is provided between the filter lower platform and the recycling bin. The recycling channel is located on the workbench and connected to the recycling bin, and is used to transfer the membrane clamps that are replaced on the filter lower platform to the recycling bin.

[0023] This utility model has the following beneficial effects:

[0024] 1. Compared with the manual membrane replacement method in the prior art, the automatic membrane replacement device of this utility model has a faster membrane replacement speed, which can effectively reduce labor intensity, save time and effort, and has good operation consistency, convenience and reliability. It avoids problems such as pipeline leakage and filter membrane contamination and damage caused by manual operation, and can reduce membrane replacement error and improve the accuracy of filter membrane replacement. In addition, the device can automatically replace the filter membrane according to the usage frequency requirements, with a high degree of automation.

[0025] 2. The membrane clamping tank of this device is small in size but large in capacity, and can store a large number of membrane clamps to be filtered. Multiple membrane clamps can be replaced by storing them once, which extends the maintenance cycle and can meet the needs of long-term sampling. It greatly improves the convenience of maintenance. The membrane clamping tank is detachably installed between the pressure tank plate and the membrane receiving plate. It is easy to disassemble and assemble, and it is convenient to replenish new membrane clamps. Moreover, maintenance personnel can replace membrane clamping tanks of different capacities according to the needs of operation and testing frequency, which has a wide range of applications.

[0026] 3. The membrane clips are stacked one on top of the other inside the membrane clip bucket. They can fall into the membrane passage by gravity and then be pushed to the lower platform of the filter by the membrane pushing mechanism for replacement, which greatly improves the membrane replacement efficiency. The replaced membrane clips can be collected by the set recycling mechanism.

[0027] 4. Compared with traditional air filter membrane replacement devices, this device can simultaneously replace the new membrane clip and recycle the old membrane clip using only the membrane pushing mechanism. The membrane replacement operation is simple, quick, efficient, and occupies little space, making it economical.

[0028] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the overall structure of the automatic filter membrane replacement device according to a preferred embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the feeding mechanism according to a preferred embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view of the feeding mechanism of a preferred embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the membrane clamping bucket according to a preferred embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the membrane clip according to a preferred embodiment of the present invention;

[0035] Figure 6 This is a cross-sectional view of the filter mechanism of a preferred embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the recycling mechanism of a preferred embodiment of the present invention.

[0037] Legend:

[0038] 100. Feeding mechanism; 101. Membrane clamping drum; 1011. Membrane storage bin; 1012. Radial limiting plate; 1013. Axial limiting plate; 102. Membrane receiving tray; 1021. Limiting block; 1022. Groove; 103. Pressing drum plate; 1031. Spring; 1032. Shoulder screw; 1033. Pressing drum plate; 200. Membrane clamp; 201. Membrane clamping tray; 202. Filter membrane; 203. First sealing ring; 204. First slot; 300. Filtering mechanism; 301, lower filter platform; 302, upper filter platform; 3021, pressing motor; 3022, membrane pressing block; 3023, second slot; 3024, protrusion; 3025, second sealing ring; 400, membrane pushing mechanism; 401, drive motor; 402, membrane pushing plate; 500, recovery mechanism; 501, recovery bin; 502, baffle; 503, limiting plate; 600, frame; 700, worktable; 800, recovery channel. Detailed Implementation

[0039] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0040] like Figure 1As shown, the automatic membrane replacement device of this embodiment includes a frame 600, a worktable 700 installed inside the frame 600, a filter mechanism 300 for filtering particulate matter in gas, a feeding mechanism 100 for storing and outputting new membrane clips 200 to be filtered, and a membrane pushing mechanism 400 for horizontally pushing the new membrane clips 200 output by the feeding mechanism 100 into the filter mechanism 300 for replacement. A recycling mechanism 500 for collecting the old membrane clips 200 replaced on the filter mechanism 300 is installed outside the frame 600. Specifically, the feeding mechanism 100 is installed between the membrane pushing mechanism 400 and the filtration mechanism 300, and includes a pressing plate 103, a membrane clamping barrel 101 and a receiving plate 102 arranged sequentially from top to bottom. The two ends of the membrane clamping barrel 101 are respectively engaged with the pressing plate 103 and the receiving plate 102 to accommodate the membrane clamps 200 to be filtered. The pressing plate 103 is used to press the membrane clamping barrel 101 onto the receiving plate 102. The end of the pressing plate 103 away from the membrane clamping barrel 101 is fixedly connected to the inner wall of the frame 600. The receiving plate 102 is used to receive the membrane clamps 200 output from the membrane clamping barrel 101. The end of the receiving plate 102 away from the membrane clamping barrel 101 is fixed on the worktable 700. The membrane clamp container 101 is small in size but large in capacity, capable of storing a large number of membrane clamps 200 to be filtered. Multiple replacements of membrane clamps 200 can be achieved with a single storage in the container 101, extending the maintenance cycle and meeting long-term sampling requirements, greatly improving maintenance convenience. The membrane clamp container 101 is detachably installed between the pressure plate 103 and the receiving plate 102, facilitating easy assembly and disassembly and replenishment of new membrane clamps 200. Maintenance personnel can replace membrane clamp containers 101 of different capacities according to operational testing frequency requirements, making it widely applicable. A membrane passage channel, the height of one membrane clamp 200, is formed between the membrane clamp container 101 and the receiving plate 102. Several membrane clamps 200 are stacked vertically within the membrane clamp container 101 and fall into the membrane passage channel by their own gravity, controlling the membrane pushing mechanism 400 to push only one membrane clamp 200 at a time for replacement, effectively improving the reliability of membrane replacement. In addition, this automatic filter replacement device greatly reduces the use of power components such as motors and linear modules. It has a simple structure and control logic, occupies little space, and is easy to miniaturize.

[0041] The filtration mechanism 300 includes a lower filtration platform 301 and an upper filtration platform 302. The lower filtration platform 301 is fixedly installed on the workbench 700 for placing the membrane clamp 200. The upper filtration platform 302 is correspondingly arranged above the lower filtration platform 301 and fixed to the frame 600 for pressing the membrane clamp 200 onto the lower filtration platform 301. Thus, by passing the gas sample to be filtered into the upper filtration platform 302, it passes through the membrane clamp 200 to filter out dust and other impurities in the gas. The filtered gas then passes through the lower filtration platform 301 and enters the area below the workbench 700, thereby completing the filtration of the gas sample.

[0042] The membrane pushing mechanism 400 includes a drive motor 401 and a membrane pushing plate 402 for horizontally pushing the new membrane clamp 200 received on the membrane receiving tray 102. The drive motor 401 and the filter mechanism 300 are arranged on both sides of the feeding mechanism 100 and fixed on the worktable 700 and / or the frame 600. The membrane pushing plate 402 is fixed to the output end of the drive motor 401 and is set towards the membrane channel. Thus, the driving force provided by the drive motor 401 can make the membrane pushing plate 402 move linearly in the horizontal direction to horizontally push the membrane clamp 200 on the receiving tray 102 onto the lower filter platform 301, thereby realizing the replacement of the membrane clamp 200. The end of the pusher plate 402 furthest from the drive motor 401 is positioned corresponding to the side end of the membrane clamp 200 on the receiving plate 102. The horizontal height of the upper surface of the receiving plate 102 is not lower than the horizontal height of the upper surface of the lower filter platform 301, ensuring that the membrane clamp 200 on the receiving plate 102 can be smoothly pushed onto the lower filter platform 301 by the pusher plate 402. This results in fast membrane replacement speed and effectively improves membrane replacement efficiency. Simultaneously, setting the receiving plate 102 to a slightly higher horizontal height than the lower filter platform 301 reduces the manufacturing difficulty of the device.

[0043] The recycling mechanism 500 is fixedly installed on the outside of the frame 600. The recycling mechanism 500 is arranged on one side of the filter mechanism 300 and has a recycling port for recycling the old membrane clip 200 facing the filter mechanism 300. The recycling port is set along the pushing direction of the pusher plate 402. Thus, while the pusher plate 402 pushes the new membrane clip 200 on the receiving plate 102 to the lower filter platform 301, the old membrane clip 200 on the lower filter platform 301 can be pushed into the recycling mechanism 500 for recycling at the same time. This allows the replacement of the new membrane clip 200 and the recycling of the old membrane clip 200 to be achieved simultaneously by the pusher mechanism 400. The membrane replacement operation is simple, quick and efficient, with good consistency, convenience and reliability. The structure is simple and the cost is low. At the same time, it can reduce the error of membrane replacement and improve the reliability of filter membrane 202 replacement.

[0044] After the device is installed, when it is necessary to replace the old membrane clip 200 on the filter mechanism 300, firstly, control the upper filter platform 302 to move away from the lower filter platform 301 so that the membrane clip 200 on the lower filter platform 301 is in a movable state. Then, activate the drive motor 401 of the membrane pushing mechanism 400 so that the drive motor 401 drives the membrane pushing plate 402 to horizontally push the new membrane clip 200 in the membrane channel. The new membrane clip 200 moves towards the old membrane clip 200 and comes into contact with the old membrane clip 200. Under the pushing force of the membrane pushing plate 402, the old membrane clip 200 is gradually pushed out of the lower filter platform 301. When the new membrane clip 200 is completely pushed to the position of the original membrane clip 200 on the lower filter platform 301, the old membrane clip 200 is completely detached from the lower filter platform 301 and is in a suspended state. The suspended old membrane clip 200 falls into the recycling mechanism 500 for recycling under the action of gravity, thus completing the replacement of the membrane clip 200.

[0045] like Figure 1 , Figure 2 and Figure 3As shown, the pressing plate 103 includes a pressing plate 1033, a spring 1031, and a shoulder screw 1032. The pressing plate 1033 is arranged above the membrane clamping barrel 101. The spring 1031 is fixed to the pressing plate 1033 by the shoulder screw 1032 and is used to provide elastic force to the membrane clamping barrel 101 to press the membrane clamping barrel 101 onto the receiving plate 102. Preferably, a limiting groove is provided in the end face of the pressure plate 1033 facing the membrane clamp 101. The inner diameter of the limiting groove is adapted to the outer diameter of the membrane clamp 101, so that the membrane clamp 101 can be movably engaged with the pressure plate 1033 by engaging with the limiting groove. On the one hand, the limiting groove can radially limit the membrane clamp 101 to prevent it from tipping over, and at the same time, it can make the membrane clamp 101 easy to be disassembled and assembled from the pressure plate 1033, so as to replenish the membrane clamp 200 in the membrane clamp 101. On the other hand, the limiting groove can keep the membrane clamp 101 in a vertical state, ensuring that the membrane clamps 200 stacked in the membrane clamp 101 fall smoothly into the membrane passage. Optionally, the pressure plate 1033 is further provided with a spring limiting groove for radially limiting the spring 1031, to prevent the spring 1031 from tilting to the side and to ensure that the spring 1031 applies elastic force to the membrane clamping barrel 101 axially. Specifically, in this embodiment, the spring 1031 is arranged between the pressure plate 1033 and the frame 600 and is fixedly connected to the frame 600, so that the pressure plate 1033 can move up and down under the elastic force of the spring 1031 to achieve pressing and releasing of the membrane clamping barrel 101. When installing the membrane clamping bucket 101, first press the pressure plate 1033 towards the spring 1031 to compress the spring 1031, so that there is enough height between the pressure plate 1033 and the receiving plate 102 for the membrane clamping bucket 101 to pass through. Then, place the membrane clamping bucket 101 vertically on the receiving plate 102, and make the limiting groove on the pressure plate 1033 correspond to the upper end face of the membrane clamping bucket 101. Then, release the pressure plate 1033 to extend the spring 1031. Thus, under the elastic action of the spring 1031, the pressure plate 1033 presses the membrane clamping bucket 101 tightly onto the receiving plate 102 and engages with the membrane clamping bucket 101 through the limiting groove, so that the membrane clamping bucket 101 is securely and reliably installed between the pressure plate 1033 and the receiving plate 102. When the membrane clamp 101 needs to be disassembled to replenish the membrane clamp 200, the pressure plate 1033 is moved toward the spring 1031 to compress the spring 1031, thus creating space for disassembly of the membrane clamp 101. Optionally, the pressure plate 1033 can be fixed to the frame 600, with the spring 1031 positioned between the membrane clamp 101 and the pressure plate 1033 and fixed to the pressure plate 1033 by shoulder screws 1032. This allows the membrane clamp 101 to directly contact the spring 1031 and move up and down under the elastic action of the spring 1031, thereby achieving the pressing and releasing of the membrane clamp 101 on the receiving tray 102.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the membrane clamp 101 includes a membrane storage chamber 1011 for accommodating a plurality of membrane clamps 200 to be filtered, radial limiting plates 1012 arranged on both sides of the membrane passage, and an axial limiting plate 1013 arranged at the bottom of the membrane passage. The radial limiting plate 1012 is arranged along the axial direction of the membrane storage chamber 1011. The membrane storage chamber 1011, the radial limiting plate 1012, and the axial limiting plate 1013 are fixedly connected to form an integral structure, thereby forming a membrane passage between the axial limiting plate 1013 and the bottom of the membrane storage chamber 1011. The membrane clips 200 within 1011 are stacked vertically, facilitating their entry into the membrane passage under gravity. Within the passage, the membrane clips 200 are radially limited by a radial limiting plate 1012 to prevent them from detaching from either side, and axially limited by an axial limiting plate 1013 to prevent them from falling from the bottom of the passage. This ensures that the membrane clips 200 within the passage can only move along the central axis of the old membrane clips 200 on the lower filter platform 301, guaranteeing reliable membrane clip replacement. The radial limiting plate 1012 is positioned on the side of the membrane storage chamber 1011 closest to the membrane pushing mechanism 400 to restrict the pushing direction of the membrane clips 200 within the passage, ensuring they can only move towards the filter mechanism 300, further improving membrane replacement accuracy. Preferably, the height of the membrane storage chamber 1011 can be adjusted according to the maintenance cycle of the membrane clips 200, so that the membrane storage chamber 1011 can accommodate different numbers of new membrane clips 200 to be filtered, thereby improving the applicability and flexibility. Preferably, the membrane storage chamber 1011 has a strip-shaped hole along the axial direction, the length of which is adapted to the height of the membrane storage chamber 1011, so as to facilitate observation of the number of membrane clips 200 in the membrane storage chamber 1011 and to facilitate timely replenishment of membrane clips 200 in the membrane storage chamber 1011.

[0047] like Figure 2 and Figure 3As shown, a limiting block 1021 is fixed on the upper end face of the film receiving tray 102. The limiting block 1021 is correspondingly arranged below the film storage tank 1011 to abut against the bottom of the film storage tank 1011. The limiting block 1021 is arranged along the pushing direction of the film pushing plate 402 and is arranged on the same side as the radial limiting plate 1012. Preferably, two limiting blocks 1021 are symmetrically arranged along the radial limiting plate 1012, so that a space for accommodating a film clamp 200 is formed between the four limiting blocks 1021. The height of the limiting block 1021 is adapted to the height of the film passage. By setting a limiting block 1021 on the membrane receiving tray 102, the membrane clamp 200 in the membrane channel can be further limited on both sides, preventing the membrane clamp 200 from coming out from both sides when the pusher plate 402 pushes the membrane clamp 200 in the membrane channel. At the same time, the position of the membrane clamp barrel 101 can be axially limited, so that there is always a membrane channel between the membrane clamp barrel 101 and the membrane receiving tray 102 that can pass through the height of one membrane clamp 200, ensuring that the membrane clamp 200 in the membrane channel is smoothly pushed into the filter mechanism 300 by the pusher plate 402.

[0048] The receiving tray 102 has grooves 1022 on both sides for engaging with the axial limiting plate 1013. These grooves 1022 are arranged between the two limiting blocks 1021 along the pushing direction of the pusher plate 402. By engaging the axial limiting plate 1013 within the grooves 1022, a stable and reliable connection can be achieved between the membrane clamp 101 and the receiving tray 102, facilitating assembly and disassembly. Preferably, in this embodiment, the height of the grooves 1022 is adapted to the thickness of the axial limiting plate 1013, allowing the membrane clamp 200 in the membrane channel to be placed horizontally on the receiving tray 102, increasing the contact area of ​​the membrane clamp 200 and ensuring the flatness and stability of its placement. Optionally, the thickness of the axial limiting plate 1013 can be less than the height of the grooves 1022.

[0049] like Figure 5 As shown, the membrane clamp 200 is used to install the filter membrane 202, and includes a membrane clamping plate 201, a filter membrane 202 clamped in the membrane clamping plate 201, and a first sealing ring 203 pressed onto the filter membrane 202. Specifically, the membrane holder 201 has a membrane groove for accommodating the filter membrane 202, and the bottom of the membrane holder 201 has a vent hole communicating with the membrane groove, so that the filter membrane 202 in the membrane groove can transport the filtered gas. The first sealing ring 203 is pressed radially against the outer periphery of the filter membrane 202. The membrane holder 201 has a dovetail groove circumferentially arranged in the membrane groove to embed the first sealing ring 203, so that the first sealing ring 203 is firmly held above the filter membrane 202 in the membrane holder 201 and pressed against the outer periphery of the filter membrane 202, sealing the outer periphery of the filter membrane 202 and preventing the gas sample from passing through the periphery of the filter membrane 202 during the gas filtration test, thus ensuring the reliability of filtration. Preferably, the first sealing ring 203 is an O-ring rubber ring.

[0050] The membrane clamping disc 201 is also provided with a first clamping groove 204, which is located above the first sealing ring 203 and is used to engage with the filter upper platform 302 for assembly. The outer wall of the end of the membrane clamping disc 201 away from the vent is chamfered circumferentially to ensure that the membrane clamp 200 is aligned with the filter upper platform 302, avoid slight positional displacement caused by assembly error of the membrane clamp 200 on the filter mechanism 300, and improve the accuracy of the position of the membrane clamp 200 after replacement.

[0051] like Figure 1 and Figure 6 As shown, the upper filter platform 302 is positioned above the lower filter platform 301 and includes a pressing motor 3021 fixed to the frame 600 and a membrane pressing block 3022 fixed to the output end of the pressing motor 3021. Activating the pressing motor 3021 controls the pressing module to move towards the lower filter platform 301, thereby pressing the outer periphery of the membrane clamp 200 on the lower filter platform 301. A second slot 3023 is provided at one end of the membrane pressing block 3022 facing the lower filter platform 301. The inner diameter of the second slot 3023 is adapted to the outer diameter of the membrane clamping disc 201 to accommodate and hold the membrane clamping disc 201, thereby positioning the membrane clamp 200 on the lower filter platform 301 and preventing the membrane clamp 200 from shifting. The end of the membrane pressing block 3022 facing the lower filter platform 301 is also provided with a protrusion 3024. This protrusion 3024 is radially disposed in the second slot 3023 and is adapted to the first slot 204 of the membrane clamping disc 201 to engage with the first slot 204 of the membrane clamping disc 201, further ensuring the accuracy of the membrane clamp 200 position. The outer wall of the end of the protrusion 3024 in the pressing module facing the membrane clamp 200 and the side wall of the second slot 3023 are also provided with chamfers. The chamfers on the pressing module and the membrane clamp 200 facilitate the assembly of the membrane clamp 200 with the pressing module, and at the same time, ensure the alignment of the membrane clamp 200 with the membrane pressing block 3022, avoid assembly errors, and improve assembly accuracy.

[0052] like Figure 6As shown, the membrane pressing block 3022 has an inlet, and the lower filtration platform 301 has an outlet corresponding to the inlet. The outer periphery of the membrane clamp 200 is pressed onto the lower filtration platform 301 by the pressing module, and the filter membrane 202 in the membrane clamp 200 is positioned between the inlet and the outlet. The inlet, the filter membrane 202, the vent hole of the membrane clamping plate 201, and the outlet are interconnected. Thus, by introducing a gas sample into the inlet, the gas sample can pass through the filter membrane 202 to filter out dust and other impurities, and the filtered gas sample is output through the outlet to complete the filtration. A second sealing ring 3025 is provided between the membrane pressing block 3022 and the lower filtration platform 301. The second sealing ring 3025 is radially arranged on the outer periphery of the membrane clamp 200 and embedded in the membrane pressing block 3022 to seal the outer periphery of the membrane clamp 200, preventing other gases from entering the filter membrane 202 inside the membrane clamp 200 from the outside, preventing interference with the gas sample, and ensuring the accuracy of the target sample test. Preferably, the second sealing ring 3025 is an O-ring rubber ring, which is embedded in the pressing block through a dovetail groove.

[0053] like Figure 7 As shown, the recycling mechanism 500 includes a recycling bin 501 for recycling old membrane clips 200 replaced on the filtration mechanism 300, a baffle 502 movably installed at the bottom of the recycling bin 501, and a limiting plate 503 arranged below the baffle 502. The recycling bin 501 is fixedly installed on the outside of the frame 600 to prevent the recycled old membrane clips 200 from contaminating the filtration mechanism 300 inside the frame 600. The limiting plates 503 are arranged on both sides of the recycling bin 501 and fixedly connected to the recycling bin 501, forming a membrane outlet between the two limiting plates 503 that allows the membrane clips 200 to pass through. A recycling channel 800 is provided between the lower filtration platform 301 and the recycling bin 501. The recycling channel 800 is opened on the workbench 700 and communicates with the recycling bin 501 to convey the membrane clips 200 replaced on the lower filtration platform 301 into the recycling bin 501. Specifically, when the pusher plate 402 completely pushes the old membrane clip 200 on the filter mechanism 300 to the outside of the filter lower platform 301, the suspended old membrane clip 200 falls into the recycling channel 800, and then the old membrane clip 200 enters the recycling bin 501 through the recycling channel 800 for collection. When it is necessary to clean the old membrane clip 200 in the recycling bin 501, a membrane collection container is placed under the recycling bin 501, and then the baffle 502 at the bottom of the recycling bin 501 is pulled outward, so that the old membrane clip 200 in the recycling bin 501 falls from the membrane outlet into the membrane collection container, thereby realizing the unloading and recycling of the old membrane clip 200.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic filter membrane replacement device, characterized in that, include: The feeding mechanism (100) includes a membrane clamping bucket (101) for accommodating the membrane clamp (200) to be filtered, a membrane receiving plate (102) for receiving the membrane clamp (200) output from the membrane clamping bucket (101), and a pressing plate (103) for pressing the membrane clamping bucket (101) onto the membrane receiving plate (102). A membrane passage is formed between the membrane clamping bucket (101) and the membrane receiving plate (102) through which one membrane clamp (200) can pass. The filtration mechanism (300) includes a lower filtration platform (301) for placing the membrane clip (200) and an upper filtration platform (302) for pressing the membrane clip (200) onto the lower filtration platform (301). The gas sample passes through the upper filtration platform (302), the membrane clip (200) and the lower filtration platform (301) in sequence for gas filtration. The membrane pushing mechanism (400) includes a drive motor (401) and a membrane pushing plate (402) fixed to the output end of the drive motor (401). The membrane pushing plate (402) is arranged facing the membrane channel and is used to horizontally push the membrane clamp (200) to be filtered on the membrane receiving tray (102) to the filter lower platform (301) for replacement. A recycling mechanism (500) is disposed on one side of the filtration mechanism (300) for collecting the membrane clips (200) that have been replaced from the filtration mechanism (300).

2. The automatic filter membrane replacement device according to claim 1, characterized in that, The automatic filter membrane replacement device also includes a frame (600), and the frame (600) is provided with a worktable (700) for installing the feeding mechanism (100), the filtering mechanism (300) and the membrane pushing mechanism (400). The recycling mechanism (500) is installed on the outside of the frame (600).

3. The automatic filter membrane replacement device according to claim 2, characterized in that, The pressure plate (103) includes a pressure plate (1033) arranged above the membrane clamping barrel (101), a spring (1031), and a shoulder screw (1032) for fixing the spring (1031) on the pressure plate (1033); The pressure plate (1033) has a limiting groove for radially limiting the membrane clamp (101).

4. The automatic filter membrane replacement device according to claim 1, characterized in that, The membrane clamp (101) includes a membrane storage chamber (1011), radial limiting plates (1012) arranged on both sides of the membrane passage, and an axial limiting plate (1013) fixed to the bottom of the radial limiting plate (1012). The radial limiting plate (1012) is arranged along the axial direction of the membrane storage chamber (1011) and fixedly connected to the bottom of the membrane storage chamber (1011). The distance between the axial limiting plate (1013) and the membrane storage chamber (1011) is adapted to the height of the membrane passage. The radial limiting plate (1012) is arranged on the side of the film storage tank (1011) near the film pushing mechanism (400).

5. The automatic filter membrane replacement device according to claim 4, characterized in that, The upper end face of the receiving plate (102) is fixed with a limiting block (1021) for abutting against the bottom of the film storage tank (1011), and the height of the limiting block (1021) is adapted to the height of the film passage. The receiving plate (102) has grooves (1022) on both sides for engaging with the axial limiting plate (1013).

6. The automatic filter membrane replacement device according to claim 1, characterized in that, The membrane clamp (200) includes a membrane clamping disc (201), a filter membrane (202) clamped in the membrane clamping disc (201), and a first sealing ring (203) for pressing the outer periphery of the filter membrane (202) into the membrane clamping disc (201). The first sealing ring (203) is arranged above the filter membrane (202) and embedded in the membrane clamping disc (201). The membrane clamping disc (201) has a first slot (204) for engaging with the filter upper platform (302). The first slot (204) is arranged above the first sealing ring (203). The outer wall of the end of the membrane disc (201) away from the filter membrane (202) is chamfered in the circumferential direction.

7. The automatic filter membrane replacement device according to claim 6, characterized in that, The upper filter platform (302) includes a pressing motor (3021) fixed on the frame (600) and a pressing block (3022) fixed to the output end of the pressing motor (3021). The pressing block (3022) has a second slot (3023) for locking the pressing plate (201) at one end facing the lower filter platform (301). The pressure block (3022) is provided with a chamfer corresponding to the film receiving plate (201).

8. The automatic filter membrane replacement device according to claim 7, characterized in that, A second sealing ring (3025) is provided between the membrane pressing block (3022) and the filter lower platform (301). The second sealing ring (3025) is arranged radially on the outer periphery of the membrane clamp (200) and embedded in the membrane pressing block (3022).

9. The automatic filter membrane replacement device according to claim 2, characterized in that, The recycling mechanism (500) includes a recycling bin (501) fixed to the outer wall of the frame (600), a baffle (502) movably installed at the bottom of the recycling bin (501), and a limiting plate (503) arranged below the baffle (502). The limiting plate (503) is arranged on both sides of the recycling bin (501) and fixedly connected to the recycling bin (501). A membrane outlet is formed between the two limiting plates (503) to allow the membrane clamp (200) to pass through.

10. The automatic filter membrane replacement device according to claim 9, characterized in that, A recycling channel (800) is provided between the filter lower platform (301) and the recycling bin (501). The recycling channel (800) is located on the workbench (700) and communicates with the recycling bin (501) to transport the membrane clip (200) replaced on the filter lower platform (301) into the recycling bin (501).

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