Automatic membrane changing device for particulate matter sampling
By designing the compression injection mechanism and the filter membrane transmission mechanism, the miniaturization and automation of the particulate matter sampling automatic membrane changer have been achieved, solving the problems of large equipment size and poor environmental adaptability, and reducing operation and maintenance costs and the probability of mechanical failure.
Patent Information
- Application Number
- CN202520042594.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing particulate matter sampling membrane exchangers are large in size and have complex mechanisms. They are greatly affected by environmental factors in outdoor environments and are prone to mechanical problems.
The system employs a pressing and injection mechanism and a filter membrane drive mechanism, including an upper pressure block for the membrane carrier, a lower pressure block for the membrane carrier, a lifting drive assembly, and a rotation drive assembly, to achieve automatic membrane changing, simplify the sampling gas path structure, optimize the operating path of the membrane carrier, and reduce the size of the equipment.
It extends the equipment's operation and maintenance cycle, reduces operation and maintenance costs, makes the equipment smaller and easier to transport, is compatible with multiple devices, and improves its adaptability in outdoor environments.
Smart Images
Figure CN223668887U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of particulate matter sampling, and particularly relates to an automatic membrane changer for particulate matter sampling. BACKGROUND
[0002] In the existing particulate matter sampling membrane changer, most of them have a bulky cabinet, and a large automatic sliding table and other moving parts are installed in the cabinet. When changing the membrane, the membrane is transported to the specified position by the large sliding table, and then the membrane at the specified position is transported to the inlet and outlet port position by the conveying device such as a conveyor belt or a sliding table, and then the air inlet work is started. When the air inlet work is completed, the used membrane is transported back to the large sliding table by the conveying device, and then the large sliding table is lifted by one point for the next sampling action. However, the particulate matter sampling membrane changer in the prior art has a large volume and a complex mechanism, and is greatly affected by environmental factors in outdoor environments, such as being easily affected by high temperature environment or dust, etc. to cause various mechanical problems. CONTENT OF THE UTILITY MODEL
[0003] In view of the above analysis, the embodiments of the present application aim to provide an automatic membrane changer for particulate matter sampling, so as to solve the problem that the particulate matter sampling membrane changer in the prior art has a large volume and a complex mechanism, and is greatly affected by environmental factors in outdoor environments.
[0004] The purpose of the present application is achieved as follows:
[0005] An automatic membrane changer for particulate matter sampling comprises:
[0006] The compact sampling mechanism has an upper membrane drag pressing block, a lower membrane drag pressing block and a lifting drive assembly. The upper membrane drag pressing block is fixed above the lower membrane drag pressing block. The lifting drive assembly is configured to drive the lower membrane drag pressing block to rise when sampling, and to seal and extrude the upper membrane drag pressing block to realize the connection of the sampling gas path, and to drive the lower membrane drag pressing block to descend after sampling is completed, and to separate from the upper membrane drag pressing block to realize the disconnection of the sampling gas path.
[0007] The filter membrane transmission mechanism has a membrane loading tray and a rotating drive assembly. The membrane loading tray is provided with a plurality of filter membrane assemblies. The rotating drive assembly is configured to drive the membrane loading tray to rotate, so that the plurality of filter membrane assemblies are sequentially rotated between the upper membrane drag pressing block and the lower membrane drag pressing block for sampling.
[0008] Further, the drive assembly comprises a second speed reduction motor, a push rod gear and a push rod rack. The push rod rack is vertically arranged and provided with an air passage one. The top end of the push rod rack is sealingly connected with the lower membrane drag pressing block. The output shaft of the second speed reduction motor is provided with the push rod gear. The push rod gear is engaged with the teeth on the outer wall of the push rod rack. The second speed reduction motor drives the push rod rack to rise and descend through the push rod gear.
[0009] Further, the driving assembly further comprises a pressing part carrier block and a linear bearing, the push rod rack is arranged on the pressing part carrier block through the linear bearing; the second speed reduction motor is fixed on the pressing part carrier block.
[0010] Further, the number of linear bearings is two, the two linear bearings are arranged on the upper and lower parts of the push rod rack and are located on the upper and lower sides of the push rod gear.
[0011] Further, the film drag upper pressing block is provided with an air passage two, the film drag upper pressing block is provided with an air passage three, the air passage one, the air passage two and the air passage three are coaxially arranged vertically; the top end of the air passage three is the sampling gas inlet of the sampling gas path, the bottom end of the air passage one is the sampling gas outlet of the sampling gas path, and the filter membrane assembly at the sampling position can be sealingly connected between the air passage two and the air passage three.
[0012] Further, the filter membrane transmission mechanism further has a film carrying top plate and a film carrying bottom plate, the film carrying top plate and the film carrying bottom plate are fixedly connected, and the film carrying bottom plate is fixedly arranged on the pressing part carrier block through the connecting seat; the film drag upper pressing block is fixed on the film carrying top plate, and the film carrying tray is rotatably arranged in the space between the film carrying top plate and the film carrying bottom plate.
[0013] Further, the rotating driving assembly comprises a first speed reduction motor, the first speed reduction motor is installed on the film carrying bottom plate, the first speed reduction motor is connected with the tray shaft through a shaft coupling, and the upper part of the tray shaft is fixedly connected with the center of the film carrying tray.
[0014] Further, guide rollers are arranged between the film carrying tray and the film carrying bottom plate and between the film carrying tray and the film carrying top plate, and the guide rollers are configured to limit the up-and-down floating of the film carrying tray.
[0015] Further, a photoelectric sensor is arranged on the film carrying top plate, and a plurality of light shielding plates are arranged on the film carrying tray corresponding to the filter membrane assemblies.
[0016] Further, the filter membrane assembly has a film drag, and sealing rings are arranged between the film drag and the film drag upper pressing block, between the film drag and the film drag lower pressing block, and between the push rod rack and the film drag lower pressing block.
[0017] Further, the filter membrane assembly has a film drag, and sealing rings are arranged between the film drag and the film drag upper pressing block, between the film drag and the film drag lower pressing block, and between the push rod rack and the film drag lower pressing block.
[0018] Compared with the prior art, the granular matter sampling automatic membrane changer provided by the utility model realizes automatic membrane changing through the compression sampling mechanism and the filter membrane transmission mechanism, prolongs the operation and maintenance period of the equipment, and only needs to take down the old membrane in the equipment and replace it with a new membrane each time, so that the continuous operation of the equipment can be realized and the operation and maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present specification, and other drawings can also be obtained by those skilled in the art according to these drawings.
[0020] Figure 1 The sectional view of the granular matter sampling automatic membrane changer provided by the utility model is provided.
[0021] Figure 2 The structural schematic view of the granular matter sampling automatic membrane changer provided by the utility model is provided.
[0022] Figure 3 The local structural schematic view of the granular matter automatic membrane changer provided by the utility model is provided.
[0023] Figure 4 The local structural sectional schematic view of the granular matter automatic membrane changer provided by the utility model is provided.
[0024] Figure 5 The local structural exploded schematic view of the granular matter automatic membrane changer provided by the utility model is provided.
[0025] Figure 6 The sectional schematic view of the granular matter automatic membrane changer provided by the utility model after the local structural exploded schematic view is provided.
[0026] REFERENCE SIGNS:
[0027] 1, membrane drag upper pressing block; 2, membrane carrying top plate; 3, guide roller; 4, membrane drag; 5, rotary table bearing;
[0028] 6, photoelectric sensor; 7, light shield; 8, film carrier tray; 9, speed reducer motor one; 10, speed reducer motor two; 11, film carrier bottom plate; 12, push rod gear; 13, push rod rack; 14, film drag down pressing block; 15, tray shaft; 16, shaft coupling; 17, compression part carrier block; 18, linear bearing; 19, sampling gas inlet; 20, sampling gas outlet; 21, air duct one; 22, air duct two; 23, air duct three; 24, first sealing ring; 25, second sealing ring; 26, third sealing ring; 27, connecting seat. DETAILED DESCRIPTION
[0029] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined, separated, interchanged and / or rearranged without conflict, if possible. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of protection of the present application.
[0030] In the drawings, the size and relative size of the components can be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be carried out differently, a specific process sequence can be performed in an order different from that described. For example, two consecutively described processes can be performed substantially simultaneously or in an order opposite to that described. In addition, the same reference numerals represent the same components.
[0031] The terms used herein are for the purpose of describing specific embodiments and are not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including," "includes," "having," "has," "a," "an," "the," and / or " comprises," "comprising," and any variations thereof are used in either the detailed description and / or the claims, such terms are intended to be inclusive in a manner similar to that of the terms "comprising" and / or "including" as an open transition term without precluding any additional or other elements.
[0032] Without being used as a degree term, as such, they are used to explain inherent deviations in measured, calculated, and / or provided values that would be recognized by those of ordinary skill in the art.
[0033] Example 1
[0034] In one specific embodiment of the present application, for example,Figures 1 to 6 As shown, an automatic membrane changer for particulate matter sampling is disclosed, comprising a compression sampling mechanism and a filter membrane transmission mechanism;
[0035] The compression sampling mechanism has a membrane drag upper compression block 1, a membrane drag lower compression block 14, and a lifting drive assembly. The membrane drag upper compression block 1 is fixedly arranged above the membrane drag lower compression block 14. The lifting drive assembly is configured to drive the membrane drag lower compression block 14 to ascend when sampling, and to seal and extrude the membrane drag upper compression block 1, so as to realize the connection of the sampling gas path, and to drive the membrane drag lower compression block 14 to descend after sampling is completed, and to separate from the membrane drag upper compression block 1, so as to realize the disconnection of the sampling gas path.
[0036] The filter membrane transmission mechanism has a membrane carrying tray 8 and a rotating drive assembly. The membrane carrying tray 8 is detachably installed with a plurality of filter membrane assemblies. The rotating drive assembly is configured to drive the membrane carrying tray 8 to rotate, so that the plurality of filter membrane assemblies are rotated to the sampling position in sequence. The filter membrane assembly at the sampling position is located between the membrane drag upper compression block 1 and the membrane drag lower compression block 14, and the plurality of filter membrane assemblies are rotated to the sampling position between the membrane drag upper compression block 1 and the membrane drag lower compression block 14 during the sampling process.
[0037] In one optional embodiment, the drive assembly comprises a second speed reduction motor 10, a push rod gear 12, and a push rod rack 13. The push rod rack 13 is vertically arranged and provided with an air passage 21. The push rod rack 13 is a hollow structure, and the hollow passage of the push rod rack 13 is the air passage 21. The sampling gas outlet 20 is arranged on the push rod rack 13, and is a port of the push rod rack 13. The top end of the push rod rack 13 is sealingly connected with the membrane drag lower compression block 14. The second speed reduction motor 10 is provided with the push rod gear 12 on the output shaft. The push rod gear 12 is engaged with the teeth on the outer wall of the push rod rack 13. The second speed reduction motor 10 drives the push rod gear 12 to rotate, so as to realize the lifting of the push rod rack 13. For example, when the second speed reduction motor 10 drives the push rod rack 13 to move upward through the push rod gear 12, the membrane drag lower compression block 14 pushes the membrane drag 4 to push upward against the membrane drag upper compression block 1, so as to ensure that the membrane drag is compressed at both ends, and realize the sealing of the overall gas path.
[0038] Further, the drive assembly further comprises a compression part carrier block 17 and a linear bearing 18. The push rod rack 13 is arranged on the compression part carrier block 17 through the linear bearing 18. The second speed reduction motor 10 is fixedly arranged on the compression part carrier block 17.
[0039] For example, the number of linear bearings 18 is two. The two linear bearings 18 are arranged on the upper part and the lower part of the push rod rack 13, and are located on the upper and lower sides of the push rod gear 12, so as to realize more flexible upward and downward movement of the push rod rack 13. The distance between the two linear bearings 18 can meet the distance required for the lifting of the push rod rack 13, and will not interfere with the push rod gear 12 during the working process.
[0040] In this embodiment, the lower membrane pressure block 14 is provided with a second air passage 22, and the upper membrane pressure block 1 is provided with a third air passage 23. Air passages 21, 22, and 23 are arranged coaxially and vertically. When the lower membrane pressure block 14 rises and presses against the upper membrane pressure block 1, during each sampling, the filter membrane assembly at the sampling position is sealed between air passages 22 and 23, and can communicate with air passages 21, 22, and 23 under the drive of the lifting drive assembly to form a sealed sampling gas path. Subsequently, gas is introduced from the sampling gas inlet 19 of the upper membrane pressure block 1 to filter the gas to be tested. This application integrates air passage 1 onto the lifting drive assembly, making the sampling gas path structure simpler and eliminating the need for additional gas pipelines for connection, thereby simplifying the sampling gas path structure and making the device more compact, achieving a miniaturized design.
[0041] In this embodiment, the sampling gas path has a sampling gas inlet 19 and a sampling gas outlet 20. The sampling gas inlet 19 is located on the membrane drag pressure block 1. The top port of the third gas channel 23 is the sampling gas inlet 19, and the bottom port of the first gas channel 21 is the sampling gas outlet 20. The sampling gas outlet 20 is connected to the detection equipment through a pipeline.
[0042] In this embodiment, the filter membrane transmission mechanism also has a membrane top plate 2 and a membrane bottom plate 11. The membrane top plate 2 is fixedly connected to the membrane bottom plate 11 by screws, and the membrane bottom plate 11 is fixedly mounted on the pressing block 17 by a connecting seat. The membrane drag pressing block 1 is fixed on the membrane top plate 2, and the membrane tray 8 is rotatably disposed in the space between the membrane top plate 2 and the membrane bottom plate 11.
[0043] In this embodiment, the rotation drive assembly includes a geared motor 9, which is mounted on the film base plate 11. The geared motor 9 drives the film tray 8 to rotate through a coupling 16 and a tray shaft 15. Specifically, the geared motor 9 is connected to the tray shaft 15 through the coupling 16, and the upper part of the tray shaft 15 is fixedly connected to the center of the film tray 8.
[0044] In one alternative embodiment, the space between the film carrier tray 8 and the film carrier base plate 11, and the film carrier tray
[0045] Guide rollers 3 are provided between the tray 8 and the top plate 2 of the film carrier plate. The guide rollers 3 are configured to limit the vertical floating of the film carrier plate 8. For example, three guide rollers 3 are installed on each of the bottom plate 11 and the top plate 2 of the film carrier plate to limit the vertical floating of the film carrier plate 8 and ensure the rotational stability of the film carrier plate 8. Furthermore, the upper and lower surfaces of the film carrier plate 8 are provided with annular grooves. The positions of the grooves correspond to the guide rollers 3. The guide rollers 3 on the bottom plate 11 and the top plate 2 of the film carrier plate are embedded in the grooves and can roll in the grooves, thereby limiting the vertical floating of the film carrier plate 8, making the rotation of the film carrier plate more stable and reducing mechanical failures.
[0046] In the embodiment, the particulate matter sampling automatic membrane changer further comprises a control system configured to control the start and stop of the first speed reducer 9 and the second speed reducer 10 according to a set program, so as to realize automatic control of the particulate matter sampling automatic membrane changing process.
[0047] In an alternative embodiment, the film loading top plate 2 is provided with a photoelectric sensor 6, and the film loading tray 8 is provided with a plurality of light shielding plates 7 corresponding to the positions of the filter membrane assemblies, and the light shielding plates 7 can rotate with the film loading tray 8; when the light shielding plates 7 rotate to the shielding position of the photoelectric sensor 6, the filter membrane assembly at the corresponding position is rotated into place, and the film loading tray 8 stops rotating. The control system is in signal control connection with the photoelectric sensor 6, can receive the filter membrane assembly rotation into place signal sent by the photoelectric sensor 6, and can control the first speed reducer 9 to act based on the received filter membrane assembly rotation into place signal. That is, the light shielding plates 7 can rotate with the film loading tray 8, and when rotated into place, can shield the photoelectric sensor 6 and trigger the photoelectric sensor 6 to send a filter membrane assembly rotation into place signal to the control system, and the control system controls the film loading tray 8 to stop rotating by controlling the first speed reducer 9. The start and stop of the membrane changer can be accurately controlled by the photoelectric sensor, which reduces the probability of problems occurring in the membrane changer, and at the same time, some mechanical problems can be solved remotely through software control.
[0048] In the embodiment, the filter membrane assembly comprises a membrane drag 4 and a filter membrane arranged on the membrane drag 4, and the membrane drag 4 is used for mounting and supporting the filter membrane. The film loading tray 8 is provided with a plurality of hole positions for placing the membrane drag 4, for example, six hole positions are formed on the film loading tray 8. Among the plurality of hole positions of the film loading tray 8, the hole position rotated between the upper membrane drag pressing block 1 and the lower membrane drag pressing block 14 is a sampling hole position, only one filter membrane assembly samples at a time, the filter membrane assembly completing sampling is rotated away from the sampling hole position, and at the same time, the next unsampled filter membrane assembly is rotated to the sampling hole position for sampling, thereby realizing the switching and sampling of a plurality of filter membrane assemblies in turn.
[0049] In order to improve the sealing performance of the communication sampling gas path, a sealing ring is arranged between the membrane drag 4 and the upper membrane drag pressing block 1, between the membrane drag 4 and the lower membrane drag pressing block 14, and between the push rod rack 13 and the lower membrane drag pressing block 14. Specifically, a first sealing ring 24 is arranged between the bottom end surface of the upper membrane drag pressing block 1 and the upper surface of the membrane drag 4, a second sealing ring 25 is arranged between the top end surface of the lower membrane drag pressing block 14 and the lower surface of the membrane drag 4, and the top end of the push rod rack 13 is sealingly connected to the lower membrane drag pressing block 14 through a third sealing ring 27.
[0050] Further, the first sealing ring 24, the second sealing ring 25 and the third sealing ring 27 are all O-shaped sealing rings; the bottom end surface of the film drag upper pressing block 1 is provided with a first annular groove, the first sealing ring 24 is installed in the first annular groove and protrudes from the bottom end surface of the film drag upper pressing block 1; the top end surface of the film drag lower pressing block 14 is provided with a second annular groove, the second sealing ring 25 is installed in the second annular groove and protrudes from the top end surface of the film drag lower pressing block 14.
[0051] The working process of the particulate matter sampling automatic membrane changer in the embodiment is as follows: install a filter membrane on the film drag 4, place the film drag 4 with the installed filter membrane into a hole position of the membrane loading tray 8, start the speed reducer one 9, the speed reducer one 9 drives the membrane loading tray 8 to rotate, when the light shield 7 rotates to the shielding position of the photoelectric sensor 6, the light shield 7 triggers the photoelectric sensor 6, the speed reducer one 9 is turned off, and the membrane loading tray 8 stops rotating, a film drag 4 with an installed filter membrane is placed again in the hole position upstream of the photoelectric sensor 6, and the above steps are repeated until all the hole positions are placed with the film drags. After the installation of all the film drags 4 is completed, the speed reducer two 10 is started, the push rod rack 13 is driven to rise by the push rod gear 12, the film drag lower pressing block 14 is driven to rise, until the film drag lower pressing block 14 tightly presses the film drag 4 and the film drag lower pressing block 14 from below, the film drag 4 is clamped between the film drag upper pressing block 1 and the film drag lower pressing block 14, and at this time, the sampling gas path is in a connected state. Start the gas sampling, the gas enters from the sampling gas inlet 19 of the sampling gas path, the gas passes through the filter membrane on the film drag 4, the remaining gas after filtering the large particulate impurities passes through the filter membrane from the sampling gas outlet 20 and enters the detection equipment to obtain the detection result. The sampling period is set according to the needs, for example, once a week. When the filter membrane needs to be switched, the speed reducer two 10 is started, the push rod rack 13 is driven to descend by the push rod gear 12, so that the film drag lower pressing block 14 moves downward to loosen the film drag 4, and the sampling gas path changes from the connected state to a disconnected state. At this time, the speed reducer one 9 is started, the speed reducer one 9 drives the membrane loading tray 8 to rotate, until the light shield 7 of the next hole position rotates to the shielding position of the photoelectric sensor 6, the photoelectric sensor 6 is triggered, the speed reducer one 9 stops working, and the membrane loading tray 8 stops rotating. At this time, the next sampling hole position has been switched, the speed reducer two 10 is started again, the film drag lower pressing block 14 tightly presses the film drag 4 and the film drag lower pressing block 14 from below, the sampling gas path is in a connected state again, and the gas sampling is started. The above steps are repeated until all the filter membranes on the hole positions are used up, all the film drags 4 are taken down, and new filter membranes are replaced, so that the automatic membrane changing is realized.
[0052] The working process of the particulate matter sampling automatic membrane changer in the embodiment is as follows: install a filter membrane on the film drag 4, place the film drag 4 with the installed filter membrane into a hole position of the membrane loading tray 8, start the speed reducer one 9, the speed reducer one 9 drives the membrane loading tray 8 to rotate, when the light shield 7 rotates to the shielding position of the photoelectric sensor 6, the light shield 7 triggers the photoelectric sensor 6, the speed reducer one 9 is turned off, and the membrane loading tray 8 stops rotating, a film drag 4 with an installed filter membrane is placed again in the hole position upstream of the photoelectric sensor 6, and the above steps are repeated until all the hole positions are placed with the film drags. After the installation of all the film drags 4 is completed, the speed reducer two 10 is started, the push rod rack 13 is driven to rise by the push rod gear 12, the film drag lower pressing block 14 is driven to rise, until the film drag lower pressing block 14 tightly presses the film drag 4 and the film drag lower pressing block 14 from below, the film drag 4 is clamped between the film drag upper pressing block 1 and the film drag lower pressing block 14, and at this time, the sampling gas path is in a connected state. Start the gas sampling, the gas enters from the sampling gas inlet 19 of the sampling gas path, the gas passes through the filter membrane on the film drag 4, the remaining gas after filtering the large particulate impurities passes through the filter membrane from the sampling gas outlet 20 and enters the detection equipment to obtain the detection result. The sampling period is set according to the needs, for example, once a week. When the filter membrane needs to be switched, the speed reducer two 10 is started, the push rod rack 13 is driven to descend by the push rod gear 12, so that the film drag lower pressing block 14 moves downward to loosen the film drag 4, and the sampling gas path changes from the connected state to a disconnected state. At this time, the speed reducer one 9 is started, the speed reducer one 9 drives the membrane loading tray 8 to rotate, until the light shield 7 of the next hole position rotates to the shielding position of the photoelectric sensor 6, the photoelectric sensor 6 is triggered, the speed reducer one 9 stops working, and the membrane loading tray 8 stops rotating. At this time, the next sampling hole position has been switched, the speed reducer two 10 is started again, the film drag lower pressing block 14 tightly presses the film drag 4 and the film drag lower pressing block 14 from below, the sampling gas path is in a connected state again, and the gas sampling is started. The above steps are repeated until all the filter membranes on the hole positions are used up, all the film drags 4 are taken down, and new filter membranes are replaced, so that the automatic membrane changing is realized.
[0053] Compared with the prior art, the particulate matter sampling automatic membrane changer provided in the embodiment has the following advantages
[0054] Beneficial effects:
[0055] 1. By pressing the sample injection mechanism and the filter membrane transmission mechanism, automatic membrane replacement is realized, replacing manual membrane replacement, greatly extending the operation and maintenance cycle of the equipment. Each time the operation and maintenance personnel only need to take out the old membrane in the equipment and replace it with a new membrane, so that the continuous operation of the equipment can be realized, and the operation and maintenance cost is reduced.
[0056] 2. By optimizing the running route of the membrane drag through the pressing sample injection mechanism and the filter membrane transmission mechanism, the running track is shortened, the overall volume of the membrane changer is minimized to the greatest extent without affecting the operation, facilitating transportation, and it can be placed next to the equipment that needs it. Only need to be connected to the gas circuit of other equipment that needs it, replace the filter membrane suitable for other equipment, compatible with various types of equipment that need it.
[0057] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A particulate matter sampling automatic membrane changer, characterized by, The application relates to a filter membrane sampler. The sampler comprises a pressing sampling mechanism, a filter membrane transmission mechanism and a driving assembly. The pressing sampling mechanism comprises an upper membrane dragging pressing block, a lower membrane dragging pressing block and a lifting driving assembly.
2. The particulate matter sampling automatic membrane changer according to claim 1, wherein, The upper membrane dragging pressing block is fixed above the lower membrane dragging pressing block.
3. The particulate matter sampling automatic membrane changer according to claim 2, wherein, The lifting driving assembly is configured to drive the lower membrane dragging pressing block to ascend and seal and press the upper membrane dragging pressing block to realize the connection of a sampling gas path during sampling, and to drive the lower membrane dragging pressing block to descend and separate from the upper membrane dragging pressing block to realize the disconnection of the sampling gas path after sampling.
4. The particulate matter sampling automatic membrane changer according to claim 3, wherein, The filter membrane transmission mechanism comprises a filter membrane supporting tray and a rotating driving assembly.
5. The particulate matter sampling automatic membrane changer according to any one of claims 2 to 4, characterized in that, The filter membrane supporting tray is provided with a plurality of filter membrane assemblies. The rotating driving assembly is configured to drive the filter membrane supporting tray to rotate so that the plurality of filter membrane assemblies are rotated to the space between the upper membrane dragging pressing block and the lower membrane dragging pressing block for sampling during sampling.
6. The particulate matter sampling automatic membrane changer according to claim 3, wherein, The driving assembly comprises a second speed reduction motor, a push rod gear and a push rod rack. The push rod rack is vertically arranged and provided with an air channel.
7. The particulate matter sampling automatic membrane changer according to claim 6, wherein, The top end of the push rod rack is sealingly connected with the lower membrane dragging pressing block.
8. The particulate matter sampling automatic membrane changer according to claim 6, wherein, The output shaft of the second speed reduction motor is provided with the push rod gear.
9. The particulate matter sampling automatic membrane changer according to claim 6, wherein, The push rod gear is engaged with the teeth on the outer wall of the push rod rack.
10. The particulate matter sampling automatic membrane changer according to claim 2, wherein, The second speed reduction motor drives the push rod rack to ascend and descend through the push rod gear. The driving assembly further comprises a pressing part supporting block and a linear bearing. The push rod rack is arranged on the pressing part supporting block through the linear bearing. The second speed reduction motor is fixed on the pressing part supporting block. The number of the linear bearings is two. The two linear bearings are arranged on the upper part and the lower part of the push rod rack and on the upper side and the lower side of the push rod gear. The lower membrane dragging pressing block is provided with an air channel two. The upper membrane dragging pressing block is provided with an air channel three. The air channel one, the air channel two and the air channel three are coaxially and vertically arranged. The top end of the air channel three is the sampling gas inlet of the sampling gas path. The bottom end of the air channel one is the sampling gas outlet of the sampling gas path. The filter membrane assembly at the sampling position can be sealingly connected between the air channel two and the air channel three. The filter membrane transmission mechanism further comprises a filter membrane top plate and a filter membrane bottom plate. The filter membrane top plate and the filter membrane bottom plate are fixedly connected. The filter membrane bottom plate is fixed on the pressing part supporting block through a connecting seat. The upper membrane dragging pressing block is fixed on the filter membrane top plate. The filter membrane supporting tray is rotatably arranged in the space between the filter membrane top plate and the filter membrane bottom plate. The rotating driving assembly comprises a first speed reduction motor. The first speed reduction motor is installed on the filter membrane bottom plate. The first speed reduction motor is connected with a tray shaft through a shaft coupling. The upper part of the tray shaft is fixedly connected with the center of the filter membrane supporting tray. Guide rollers are arranged between the filter membrane supporting tray and the filter membrane bottom plate and between the filter membrane supporting tray and the filter membrane top plate. The guide rollers are configured to limit the up-and-down floating of the filter membrane supporting tray. Photoelectric sensors are arranged on the filter membrane top plate. A plurality of light shielding plates are arranged on the filter membrane supporting tray corresponding to the positions of the filter membrane assemblies. Sealing rings are arranged between the membrane dragging and the upper membrane dragging pressing block, between the membrane dragging and the lower membrane dragging pressing block and between the push rod rack and the lower membrane dragging pressing block.