Spiral gas sampling device with impurity separation structure

Abstract

The invention relates to the field of electrical equipment, and discloses a spiral gas sampling device with an impurity separation structure, the spiral gas sampling device comprises a sampling part, the sampling part comprises a central pipe, the lower end of the central pipe is connected with a collecting device for collecting and detecting sampled gas through a connecting piece, and the central pipe is fixedly sleeved with a mounting seat; the upper end of the central pipe is connected with a filtering assembly, the central pipe is further connected with a cleaning part, the cleaning part comprises a double-layer-wall circular pipe, and the double-layer-wall circular pipe is rotationally arranged on the central pipe in a sleeving mode; the adjustable transformer with the rapid installation structure can effectively solve the problems that in the prior art, due to the fact that the outer side of a filter screen is prone to being partially or completely blocked after long-time operation, on one hand, the amount of air entering sampling equipment is reduced, and on the other hand, some components in an air sample sometimes enter an air collector, and the sampling efficiency is reduced. And finally, the collected sample air does not have representativeness.

Description

[0001] The invention relates to the field of gas collection, and in particular to a spiral gas sampling device with an impurity separation structure. Background Art

[0002] Gas sampling devices usually refer to equipment or systems used to collect, process or store gas. They are used in various fields such as industrial production, environmental protection, scientific research and medical treatment. In industrial production, gas sampling devices are often used to collect gases emitted from factory areas or pipelines, and cooperate with corresponding detection equipment to analyze the content of pollutants in the emitted gases in real time, so as to monitor whether the emitted gases meet the standards.

[0003] In the actual sampling process, in order to remove impurities in the air sample and ensure that the collected gas is representative and does not contain particulate matter that interferes with the analysis process, it is usually necessary to set a filter in the gas sampling device. During the real-time collection and detection process, particulate matter is easily attached to the outside of the filter under long-term operation, which may cause partial blockage of the filter, thereby increasing the resistance to airflow and reducing the amount of air entering the sampling device. At the same time, some components in the air sample are sometimes unable to enter the air collector due to the smaller mesh of the filter, which ultimately results in the collected sample air being unrepresentative and affecting the accuracy of the analysis results. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a mold processing optimization system based on a rotary punching structure, which can effectively solve the problem in the prior art that the outer side of the filter is easily partially or completely blocked under long-term operation, which on the one hand leads to increased resistance to airflow and thus reduced amount of air entering the sampling device; on the other hand, certain components in the air sample are sometimes unable to enter the air collector due to the smaller mesh of the filter, ultimately resulting in the collected sample air being unrepresentative and affecting the accuracy of the analysis results.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A spiral gas sampling device with an impurity separation structure, comprising:

[0007] The sampling part includes a central tube, the lower end of which is connected to a collecting device for collecting and detecting sampled gas through a connecting piece, a mounting seat is fixedly sleeved on the central tube, and a filter assembly is connected to the upper end of the central tube.

[0008] The cleaning part includes a double-walled circular tube, which is rotatably mounted on a central tube. The double-walled circular tube is a circular tube structure having inner and outer wall surfaces, wherein a gap exists between the outer layer and the inner layer. The double-walled circular tube is rotatably connected to a mounting seat. Two circular grooves are symmetrically penetrated through the outer tube wall of the double-walled circular tube near the top. Two annular partitions are symmetrically fixedly connected between the two tube walls of the double-walled circular tube. A cleaning assembly is connected to the lower end of the double-walled circular tube, and a switching assembly for rotating the double-walled circular tube is connected to the upper end of the cleaning assembly.

[0009] Among them, the switching component includes a cylindrical cam, which is a hollow structure and has a corrugated guide groove on its circumferential inner surface. The side wall of the double-walled circular tube is symmetrically fixedly connected with a ball head plunger, and the ball head plunger is slidingly connected in the corrugated guide groove. A retaining module is also connected to the cylindrical cam, and a delay module is connected to the retaining module.

[0010] Furthermore, the filter assembly includes an air inlet seat, which is fixedly connected to the top of the central tube through a top cover and is rotatably connected to the double-walled circular tube. Short tubes are evenly fixed and connected on the air inlet seat along the circumferential direction, two of which are connected to the double-walled circular tube through circular grooves, and the other two short tubes are connected to the cavity at the center of the double-walled circular tube through an annular partition. A rotating module is connected to the short tubes, and an annular groove is provided on the circumferential outer surface of the end of the short tube away from the air inlet seat. A filter element is rotatably connected in the annular groove, and the filter element can slide in the annular groove. A cleaning module is commonly connected to the rotating module and the filter element.

[0011] Furthermore, the rotating module includes a turbofan, which is rotatably connected in a short tube. A short rod is slidably connected to the center of the turbofan, one end of the short rod is connected to the filter element, and the other end of the short rod is connected to a conical seat.

[0012] Furthermore, the cleaning module includes a connecting sleeve, which is fixedly mounted on the short tube, and three brushes that cooperate with the filter element are fixedly connected to the connecting sleeve through a folding rod. A ball seat is fixedly connected to the vertical section where the folding rod is connected to the brush, and an annular plate is fixedly connected to one end of the filter element close to the folding rod, and a plurality of grooves are evenly arranged on the upper circumferential direction of the annular plate.

[0013] Furthermore, the retaining module includes a No. 1 annular magnet, and the upper and lower ends of the cylindrical cam are fixedly connected to the No. 1 annular magnet, and the lower end of the air intake seat and the upper end of the cleaning assembly are connected to the No. 2 annular magnet, the No. 1 annular magnet and the No. 2 annular magnet attract each other, and the air intake seat and the No. 2 annular magnet are fixedly connected.

[0014] Furthermore, the delay module includes a connecting rod, which is connected to the No. 1 annular magnet below in a circumferential direction so as to slide evenly therethrough. The lower end of the connecting rod is fixedly connected to the No. 1 annular magnet below, and the upper end of the connecting rod is fixedly connected to the No. 1 annular magnet below via a spring.

[0015] Furthermore, the cleaning component includes a sleeve, which is slidably mounted on the lower end of the double-walled circular tube, and the side wall of the sleeve and the outer side wall of the double-walled circular tube are both penetrated by through grooves, and the sleeve is connected to an air supply module.

[0016] Furthermore, the air supply module includes a bellows, the upper end of the bellows is fixedly connected to a connecting pipe, the upper end of the connecting pipe is fixedly connected to the upper end of the sleeve, the connecting pipe is fixedly connected to the second annular magnet below, the lower end of the bellows is slidingly connected to the sleeve, the lower end of the bellows is symmetrically fixedly connected to two electric push rods, and the fixed ends of the electric push rods are fixedly connected to the connecting piece.

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] When the movable section of the electric push rod in the present invention extends upward, the cylindrical cam will be driven to move upward synchronously through the spring, the second annular magnet and the lower first annular magnet, so that the double-walled circular tube will rotate ninety degrees through the cooperation between the ball head plunger and the corrugated guide groove, thereby realizing real-time switching between the operating short tube and the non-operating short tube. Compared with the two previously operating short tubes, the filter elements thereon are cleaner, so the flow guidance effect is also better. In this way, the collection efficiency of the gas collector is guaranteed. At the same time, when the movable section of the electric push rod extends upward, it will also drive the bellows to fold, thereby The gas therein forms an airflow, which is first pushed along the through groove to between the two tube walls of the double-wall circular tube, then pushed along the circular groove to the short tube connected to the circular groove at this time, and finally passed through the filter element on the short tube and pushed to the outside. The airflow from inside to outside will, on the one hand, dredge the blocked filter holes on the filter element, and on the other hand, drive the turbofan in the short tube to rotate, thereby driving the filter element to rotate through the short rod to generate centrifugal force, further separating the attachments on its surface. The two cooperate with each other to clean the filter element on the short tube in a non-operating state in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1It is a schematic diagram of the three-dimensional structure of a spiral gas sampling device with an impurity separation structure according to the present invention;

[0021] Figure 2 A top view of a sampling part and a cleaning part in a spiral gas sampling device with an impurity separation structure according to the present invention;

[0022] Figure 3 For the present invention Figure 2 Sectional view at AA in the middle;

[0023] Figure 4 It is a three-dimensional cross-sectional view of the local structure of the sampling part and the cleaning part of the present invention;

[0024] Figure 5 It is a three-dimensional cross-sectional view of the local structure of the cleaning component and the switching component of the present invention;

[0025] Figure 6 For the present invention Figure 4 A partial enlarged view of point B in the middle.

[0026] The numbers in the figure represent: 1. sampling part; 11. central tube; 12. mounting seat; 13. filter assembly; 131. air intake seat; 132. short tube; 133. rotating module; 1331. turbo fan; 1332. short rod; 134. filter element; 135. cleaning module; 1351. connecting sleeve; 1352. brush; 1353. ball seat; 1354. annular plate; 2. cleaning part; 21. double-walled round tube; 22. round groove; 23. Annular partition; 24, cleaning component; 241, sleeve; 242, through groove; 243, air supply module; 2431, bellows; 2432, connecting pipe; 2433, electric push rod; 25, switching component; 251, cylindrical cam; 252, corrugated guide groove; 253, ball plunger; 254, holding module; 2541, annular magnet No. 1; 2542, annular magnet No. 2; 255, delay module; 2551, connecting rod; 2552, spring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 making creative work are within the scope of protection of the present invention.

[0028] The present invention will be further described below in conjunction with the embodiments.

[0029] Example:

[0030] See also Figure 1-Figure 6 , a spiral gas sampling device with an impurity separation structure, comprising:

[0031] The sampling part 1 comprises a central tube 11, the lower end of the central tube 11 is connected to a collecting device for collecting and detecting the sampled gas through a connecting piece (the collecting device is an existing device, in which a gas collector is installed, and the gas collector is connected to the central tube 11. An optical particle counter is also installed in the collecting device for cooperating with the gas collector to detect the content of particulate matter in the collected gas in real time). A mounting seat 12 is fixedly sleeved on the central tube 11, and a filter assembly 13 is connected to the upper end of the central tube 11.

[0032] The cleaning part 2 includes a double-walled circular tube 21, which is rotatably mounted on the central tube 11. The double-walled circular tube 21 is a circular tube structure with inner and outer wall surfaces, wherein there is a gap between the outer layer and the inner layer. The double-walled circular tube 21 is rotatably connected to the mounting seat 12. Two circular grooves 22 are symmetrically penetrated through the outer tube wall of the double-walled circular tube 21 near the top. Two annular partitions 23 are symmetrically fixedly connected between the two tube walls of the double-walled circular tube 21. The lower end of the double-walled circular tube 21 is connected to a cleaning component 24, and the upper end of the cleaning component 24 is connected to a switching component 25 for rotating the double-walled circular tube 21.

[0033] The switching assembly 25 includes a cylindrical cam 251, which is a hollow structure and has a corrugated guide groove 252 on its inner circumferential surface. The side wall of the double-walled circular tube 21 is symmetrically fixedly connected with a ball plunger 253, and the ball plunger 253 is slidably connected in the corrugated guide groove 252. The corrugated guide groove 252 adopts a segmented design, including four vertical segments and four inclined segments. The vertical segments and the inclined segments are staggered and interconnected, and the depth of the corrugated guide groove 252 adopts a gradual design, and the depth of the inclined segment is from low to high. The height increases successively, and a step is provided at the connection between the inclined section and the vertical section. The depth of the vertical section increases successively from high to low, and the depth of the bottom end of the vertical section is less than the depth of the bottom end of the inclined section. This gradual design is used to ensure that the ball head plunger 253 will be mechanically constrained when sliding in the corrugated guide groove 252. It can only slide from bottom to top in the inclined section, and can only slide from top to bottom when sliding in the vertical section, thereby ensuring that it always slides in one direction. A retaining module 254 is also connected to the cylindrical cam 251, and a delay module 255 is connected to the retaining module 254.

[0034] The filter assembly 13 includes an air inlet seat 131, which is fixedly connected to the top of the central tube 11 through a top cover, and is rotatably connected to the double-walled circular tube 21. Short tubes 132 are evenly fixed and connected on the air inlet seat 131 along the circumferential direction, two of which are connected to the double-walled circular tube 21 through a circular groove 22, and the other two short tubes 132 are connected to the cavity at the center of the double-walled circular tube 21 through an annular partition 23. A rotating module 133 is connected to the short tube 132, and an annular groove is provided on the circumferential outer surface of the end of the short tube 132 away from the air inlet seat 131, and a filter element 134 is rotatably connected in the annular groove, and the filter element 134 can slide in the annular groove, and a cleaning module 135 is commonly connected to the rotating module 133 and the filter element 134.

[0035] The rotating module 133 includes a turbofan 1331, which is rotatably connected in the short tube 132. A short rod 1332 is slidably connected at the center of the turbofan 1331. One end of the short rod 1332 is connected to the filter element 134, and the other end of the short rod 1332 is connected to a conical seat.

[0036] The cleaning module 135 includes a connecting sleeve 1351, which is fixedly mounted on the short tube 132. Three brushes 1352 that cooperate with the filter element 134 are fixedly connected to the connecting sleeve 1351 through a folding rod. A ball seat 1353 is fixedly connected to the vertical section where the folding rod is connected to the brush 1352. An annular plate 1354 is fixedly connected to one end of the filter element 134 close to the folding rod. A plurality of grooves that cooperate with the ball seat 1353 are evenly arranged on the annular plate 1354 along the circumferential direction.

[0037] The retaining module 254 includes a No. 1 annular magnet 2541, and the upper and lower ends of the cylindrical cam 251 are fixedly connected to the No. 1 annular magnet 2541, and the lower end of the air inlet seat 131 and the upper end of the cleaning component 24 are connected to the No. 2 annular magnet 2542. The No. 1 annular magnet 2541 and the No. 2 annular magnet 2542 attract each other, and the air inlet seat 131 and the No. 2 annular magnet 2542 are fixedly connected.

[0038] The delay module 255 includes a connecting rod 2551, and the connecting rod 2551 is connected to the lower annular magnet 2541 in a circumferential direction so as to slide uniformly therethrough. The lower end of the connecting rod 2551 is fixedly connected to the lower annular magnet 2541, and the upper end of the connecting rod 2551 is fixedly connected to the lower annular magnet 2541 via a spring 2552.

[0039] The cleaning assembly 24 includes a sleeve 241 which is slidably mounted on the lower end of the double-walled circular tube 21 . A through groove 242 is formed on the side wall of the sleeve 241 and the outer wall of the double-walled circular tube 21 . An air supply module 243 is connected to the sleeve 241 .

[0040] The air supply module 243 includes a bellows 2431, the upper end of the bellows 2431 is fixedly connected to a connecting pipe 2432, the upper end of the connecting pipe 2432 is fixedly connected to the upper end of the sleeve 241, the connecting pipe 2432 is fixedly connected to the second annular magnet 2542 below, the lower end of the bellows 2431 is slidingly connected to the sleeve 241, the lower end of the bellows 2431 is symmetrically fixedly connected to two electric push rods 2433, and the fixed ends of the electric push rods 2433 are fixedly connected to the connecting piece.

[0041] In specific implementation, collecting gas by a spiral gas sampling device with an impurity separation structure includes the following steps:

[0042] 1. Gas collection: first install the spiral gas sampling device with impurity separation structure at the designated position, then start the gas collector to keep it running, so that the external airflow is absorbed into the gas collector through two short tubes 132 connected to the annular partition 23, the annular partition 23, the air inlet seat 131, the circular groove 22 and the central tube 11. In the process of collecting gas, the filter 134 will block the larger particles in the gas that do not meet the requirements to ensure that the collected gas meets the collection requirements. However, at the same time, some larger particles may also stay on the surface of the filter 134 under the attraction of the airflow. The filter holes of the filter element 134 will be blocked, resulting in a decrease in the airflow collection efficiency. Therefore, a turbofan 1331 is set in each short tube 132. The turbofan 1331 rotates passively under the influence of the airflow, and drives the filter element 134 to rotate synchronously through the short rod 1332 and generate centrifugal force, so that the attachments on its surface are detached to a certain extent. At the same time, under the push of the airflow from the outside to the inside, the conical seat moves toward the double-walled circular tube 21, and drives the filter element 134 to move synchronously through the short rod 1332, so that it is detached from the brush 1352, so as to prevent the bristles of the brush 1352 from sweeping off the attachments on its surface and entering the short tube 132 during the rotation of the filter element 134.

[0043] 2. Self-cleaning of the device: During the operation of the gas collector, initially, the two electric push rods 2433 are in a retracted state, the bellows 2431 is in an expanded state, the sleeve 241 is at the lower end of the double-walled circular tube 21, and the sleeve 241 and the through grooves 242 on the double-walled circular tube 21 are offset from each other, so that the bellows 2431 is also in a closed state, and the spring 2552 is also in a compressed state.

[0044] When the two filters 134 corresponding to the circular groove 22 have been in operation for a period of time and the filter holes on their surfaces are blocked, the movable section of the electric push rod 2433 extends to push the bellows 2431, the connecting pipe 2432 and the connecting rod 2551 to move upward synchronously, and the spring 2552 first changes from a compressed state to a stretched state. When its stretching elastic force is greater than the gravity of the cylindrical cam 251 itself, it will drive the cylindrical cam 251 to move upward synchronously through the second annular magnet 2542 and the first annular magnet 2541 below. During this process, the ball plunger 253 slides upward along the inclined section of the corrugated guide groove 252. When the ball plunger 253 slides to the top of the inclined section of the corrugated guide groove 252 and falls into the vertical section of the corrugated guide groove 252, the double-walled circular tube 21 rotates exactly ninety degrees. At the same time, the upper No. 1 annular magnet 2541 and the upper No. 2 annular magnet 2542 attract each other. At this time, there is a gap between the lower No. 1 annular magnet 2541 and the lower No. 2 annular magnet 2542 under the action of the spring 2552.

[0045] After the double-walled circular tube 21 rotates ninety degrees, the two short tubes 132 originally connected to the circular groove 22 are switched to be connected to the annular partition 23, and the short tube 132 originally connected to the annular partition 23 is switched to be connected to the circular groove 22. Therefore, when the gas collector continues to work, the airflow passes through the two short tubes 132 connected to the annular partition 23 to collect gas into the central tube 11, and the short tube 132 connected to the circular groove 22 is connected to the cavity between the two tube walls of the double-walled circular tube 21.

[0046] As the movable section of the electric push rod 2433 continues to extend, the bellows 2431 in the closed state will not fold but will continue to slide upward, and the spring 2552 will be further stretched until the sleeve 241 and the through groove 242 on the double-walled circular tube 21 are aligned, and the bellows 2431 is connected to the cavity between the two tube walls of the double-walled circular tube 21. At this time, the first annular magnet 2541 and the second annular magnet 2542 below also happen to attract each other. Later, when the electric push rod 2433 continues to extend, it will drive the bellows 2431 to fold, and the air therein will An airflow is formed, which is first pushed along the through groove 242 to between the two tube walls of the double-wall circular tube 21, then pushed along the circular groove 22 to the short tube 132 which is now connected to the circular groove 22, and finally pushed to the outside through the filter element 134 on the short tube 132. The airflow from the inside to the outside can clear the blocked filter holes on the filter element 134 on the one hand, and on the other hand drive the turbofan 1331 in the short tube 132 to rotate, thereby driving the filter element 134 to rotate through the short rod 1332 to generate centrifugal force, thereby further separating the attachments on its surface.

[0047] In addition, the airflow from inside to outside will also push the filter element 134 to slide axially along the annular groove through the conical seat and the short rod 1332, so that the filter element 134 and the brush 1352 fit together. Since the length of the bristles of the brush 1352 is greater than the depth of the filter holes in the filter element 134, after the two fit together, the bristles of the brush 1352 can enter the inside of the filter element 134 to clean the side walls of the filter holes. When the cleaned attachments fall off, they escape from the filter holes under the action of the airflow from inside to outside. At the same time, since the filter element 134 keeps rotating under the drive of the short rod 1332 and the turbofan 1331, the brush 1352 keeps static. When the filter 134 rotates, the ball seat 1353 and the annular plate 1354 also rotate relative to each other. During the relative rotation of the two, the filter 134 always keeps a tendency to approach the brush 1352 under the action of the short rod 1332 and the conical seat. Since the annular plate 1354 is provided with a groove, the filter 134 will vibrate during the relative rotation of the two, which further promotes the detachment of the attachments on the outer surface of the filter 134.

[0048] After cleaning is completed, the two electric push rods 2433 shrink synchronously. In the initial stage of shrinkage, since the magnetic force between the first annular magnet 2541 and the second annular magnet 2542 is greater than the tensile elastic force of the spring 2552, the upper end of the bellows 2431 and the sleeve 241 remain stationary, and the sleeve 241 and the through groove 242 on the double-walled circular tube 21 are still aligned and connected. As the telescopic section of the electric push rod 2433 shrinks, the bellows 2431 expands again and is filled with gas until it reaches the maximum expansion limit. Then, when the electric push rod 2433 The continued contraction of the telescopic section first drives the spring 2552 from a stretched state to a compressed state through the bellows 2431, and then drives the mutually attractive annular magnets No. 1 2541 and No. 2 annular magnets 2542 to separate. When the movable section of the electric push rod 2433 contracts to the initial state, the cylindrical cam 251 also descends and resets to the initial state. However, in this process, since the ball plunger 253 slides along the vertical section of the corrugated guide groove 252, the cylindrical cam 251 will not rotate, and during the downward sliding of the bellows 2431, the two through grooves 242 will be misaligned again.

[0049] The above process is repeated to cyclically switch the short air intake tube 132 and clean the filter element 134, thereby ensuring the collection efficiency of the gas collector and making the analysis and detection results more accurate.

[0050] It is worth noting that the above-mentioned spiral gas sampling device with impurity separation structure has the following advantages:

[0051] Advantage 1. In the process of collecting gas, the filter element 134 will block out the larger particles in the gas that do not meet the requirements, so as to ensure that the collected gas meets the collection requirements. At the same time, the turbofans 1331 arranged in each short tube 132 will passively rotate under the drive of the airflow introduced by the gas collector, so as to enhance the airflow, thereby assisting the air extraction to a certain extent. While the turbofan 1331 rotates under the drive of the airflow, it also drives the filter element 134 to rotate synchronously through the short rod 1332, so that it generates centrifugal force. This centrifugal force can separate part of the attachments on its surface when collecting gas, thereby ensuring the collection efficiency. At the same time, when exhausting air, under the push of the airflow from the outside to the inside, the conical seat moves toward the double-walled circular tube 21, thereby driving the filter element 134 to move synchronously through the short rod 1332 to separate it from the brush 1352, so as to prevent the brush 1352 from sweeping off the attachments on its surface and entering the short tube 132 during the rotation of the filter element 134.

[0052] Advantage 2: When the movable section of the electric push rod 2433 extends upward, the cylindrical cam 251 will be driven to move upward synchronously through the spring 2552, the second annular magnet 2542 and the lower No. 1 annular magnet 2541, so that the double-walled circular tube 21 is rotated ninety degrees through the cooperation between the ball head plunger 253 and the corrugated guide groove 252, and then the two short tubes 132 originally connected to the circular groove 22 are switched to be connected to the annular partition 23, and the short tube 132 originally connected to the annular partition 23 is switched to be connected to the circular groove 22. Therefore, when the gas collector continues to work, the airflow passes through the two short tubes 132 connected to the annular partition 23 at this time to collect gas in the central tube 11. Since the two short tubes 132 have not been operated before, the filter elements 134 thereon are cleaner than the two short tubes 132 that were previously operated, so the flow guidance effect is also better, thereby ensuring the collection efficiency of the gas collector.

[0053] Advantage three: the movable section of the electric push rod 2433 extends upward, and also drives the bellows 2431 to fold, thereby forming an airflow for the gas therein, which is first pushed along the through groove 242 to between the two tube walls of the double-wall circular tube 21, and then pushed along the circular groove 22 to the short tube 132 which is now connected to the circular groove 22, and finally passes through the filter element 134 on the short tube 132 and is pushed to the outside. The airflow from the inside to the outside, on the one hand, dredges the blocked filter holes on the filter element 134, and on the other hand, drives the turbofan 1331 in the short tube 132 to rotate, thereby driving the filter element 134 to rotate through the short rod 1332 to generate centrifugal force, further separating the attachments on its surface, and the two cooperate with each other to clean the filter element 134 on the short tube 132 in the non-operating state.

[0054] Advantage 4. In addition, during the above-mentioned exhaust cleaning process, the airflow from the inside to the outside will also push the filter element 134 to slide in the annular groove through the conical seat and the short rod 1332 until it fits with the brush 1352. Since the length of the bristles of the brush 1352 is greater than the depth of the filter holes in the filter element 134, after the two fit together, the bristles of the brush 1352 can enter the interior of the filter element 134 to clean the side walls of the filter holes. During the cleaning process, the attached objects continue to escape from the short tube 132 under the action of the airflow from the inside to the outside when they fall. At the same time, since the filter element 134 will rotate relative to the brush 1352 when it rotates, the attached objects on the outer surface of the filter element 134 can be further cleaned by the brush 1352. When the ball seat 1353 and the annular plate 1354 rotate relative to each other, under the action of the groove on the annular plate 1354, the filter element 134 itself will vibrate during rotation, further promoting the detachment of the attached objects on the filter element 134.

[0055] Advantage 5. The reciprocating extension and retraction of the electric push rod 2433 can realize the reciprocating switching of the working short tube 132 and the reciprocating cleaning of the filter element 134 on the non-working short tube 132, thereby ensuring that the filter element 134 on the short tube 132 is always in a relatively clean state, thereby ensuring the collection efficiency of the gas collector, and making the analysis and detection results more accurate during the real-time observation of the gas composition.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral gas sampling device with an impurity separation structure, characterized in that: include: A sampling part (1), the sampling part (1) comprising a central tube (11), the lower end of the central tube (11) being connected to a collecting device for collecting and detecting sampled gas via a connecting piece, a mounting seat (12) being fixedly sleeved on the central tube (11), and a filter assembly (13) being connected to the upper end of the central tube (11); A cleaning portion (2), the cleaning portion (2) comprising a double-walled circular tube (21), the double-walled circular tube (21) being rotatably sleeved on the central tube (11), the double-walled circular tube (21) being a circular tube structure having inner and outer wall surfaces, wherein there is a gap between the outer layer and the inner layer, the double-walled circular tube (21) being rotatably connected to the mounting seat (12), two circular grooves (22) being symmetrically penetrated through the outer tube wall of the double-walled circular tube (21) and near the top, two annular partitions (23) being symmetrically fixedly connected between the two tube walls of the double-walled circular tube (21), the lower end of the double-walled circular tube (21) being connected to a cleaning assembly (24), and the upper end of the cleaning assembly (24) being connected to a switching assembly (25) for rotating the double-walled circular tube (21); The switching assembly (25) comprises a cylindrical cam (251), the cylindrical cam (251) is a hollow structure and a corrugated guide groove (252) is provided on its circumferential inner surface, the side wall of the double-walled circular tube (21) is symmetrically fixedly connected to a ball plunger (253), the ball plunger (253) is slidably connected in the corrugated guide groove (252), the cylindrical cam (251) is also connected to a retaining module (254), and the retaining module (254) is connected to a delay module (255).

2. The spiral gas sampling device with impurity separation structure according to claim 1, characterized in that: The filter assembly (13) comprises an air intake seat (131), the air intake seat (131) is fixedly connected to the top end of the central tube (11) through a top cover, and the air intake seat (131) is rotatably connected to the double-walled circular tube (21), and short tubes (132) are evenly fixed and connected to the air intake seat (131) along the circumferential direction, two of the short tubes (132) are connected to the double-walled circular tube (21) through the circular groove (22), and the other two short tubes (132) are connected to the double-walled circular tube (21) through the annular partition plate. (23) is connected to the cavity at the center of the double-walled circular tube (21), and a rotating module (133) is connected inside the short tube (132). An annular groove is provided on the circumferential outer surface of the end of the short tube (132) away from the air inlet seat (131), and a filter element (134) is rotatably connected in the annular groove, and the filter element (134) can slide in the annular groove. A cleaning module (135) is commonly connected to the rotating module (133) and the filter element (134).

3. The spiral gas sampling device with impurity separation structure according to claim 2, characterized in that: The rotating module (133) comprises a turbofan (1331), wherein the turbofan (1331) is rotatably connected in the short tube (132), and a short rod (1332) is slidably connected at the center of the turbofan (1331), one end of the short rod (1332) is connected to the filter element (134), and the other end of the short rod (1332) is connected to a conical seat.

4. The spiral gas sampling device with impurity separation structure according to claim 2, characterized in that: The cleaning module (135) comprises a connecting sleeve (1351), the connecting sleeve (1351) being fixedly sleeved on the short tube (132), the connecting sleeve (1351) being fixedly connected to three brushes (1352) matching with the filter element (134) via a folding rod, a ball seat (1353) being fixedly connected to a vertical section where the folding rod is connected to the brushes (1352), an annular plate (1354) being fixedly connected to one end of the filter element (134) close to the folding rod, and a plurality of grooves being evenly arranged on the annular plate (1354) along the circumferential direction.

5. The spiral gas sampling device with impurity separation structure according to claim 1, characterized in that: The retaining module (254) comprises a first annular magnet (2541), the upper end and the lower end of the cylindrical cam (251) are both fixedly connected to the first annular magnet (2541), the lower end of the air inlet seat (131) and the upper end of the cleaning assembly (24) are both connected to a second annular magnet (2542), the first annular magnet (2541) and the second annular magnet (2542) attract each other, and the air inlet seat (131) and the second annular magnet (2542) are fixedly connected.

6. The spiral gas sampling device with impurity separation structure according to claim 5, characterized in that: The delay module (255) includes a connecting rod (2551), and the connecting rod (2551) is connected to the lower annular magnet (2541) in a uniformly sliding manner along the circumferential direction. The lower end of the connecting rod (2551) is fixedly connected to the lower annular magnet (2541), and the upper end of the connecting rod (2551) is fixedly connected to the lower annular magnet (2541) via a spring (2552).

7. The spiral gas sampling device with impurity separation structure according to claim 1, characterized in that: The cleaning assembly (24) comprises a sleeve (241), the sleeve (241) being slidably sleeved on the lower end of the double-walled circular tube (21), the side wall of the sleeve (241) and the outer side wall of the double-walled circular tube (21) both being provided with a through groove (242), and the sleeve (241) being connected to an air supply module (243).

8. The spiral gas sampling device with impurity separation structure according to claim 7, characterized in that: The air supply module (243) includes a bellows (2431), the upper end of the bellows (2431) is fixedly connected to a connecting pipe (2432), the upper end of the connecting pipe (2432) is fixedly connected to the upper end of the sleeve (241), the connecting pipe (2432) is fixedly connected to the second annular magnet (2542) below, the lower end of the bellows (2431) is slidably connected to the sleeve (241), the lower end of the bellows (2431) is symmetrically fixedly connected to two electric push rods (2433), and the fixed end of the electric push rod (2433) is fixedly connected to the connecting piece.

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