Self-cleaning type precession vortex gas flowmeter

Abstract

The invention discloses a self-cleaning type precession vortex gas flowmeter, and belongs to the field of gas flow measurement. Comprising a shell and an extension pipe, a buffering mechanism is arranged on the gas inlet side of the extension pipe and comprises a filtering cavity, a multi-layer filtering assembly for intercepting liquid drops and oil mist in impurity-containing gas is arranged in the filtering cavity, a supplementing mechanism is arranged at the top of the filtering cavity to provide a new adsorption filter element, and a dissolving box is fixedly connected to the bottom of the filtering cavity; a shearing and crushing module for cleaning intercepted oil mist and heavy oil is arranged at the inner top of the dissolving tank; the multi-layer filtering assembly is used for three-stage filtering, and oil mist and large-particle liquid drops carried in gas are prevented from directly entering the shell and being attached to the surface of the sensor to affect measurement of the flow meter; when the adsorption filter element is saturated and needs to be replaced, the shearing and crushing module is used for extrusion operation, residual oil mist is further treated, subsequent recovery or treatment is facilitated, the requirement for manual cleaning is reduced, and the operation and maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas flow measurement, and more specifically, to a self-cleaning swirling vortex gas flowmeter. Background Art

[0002] The swirling vortex flowmeter is based on the principle of fluid dynamics and measures the gas flow by detecting the precession frequency of the vortex. It is widely used in fields such as oil and natural gas, chemical industry, and environmental protection. However, in specific scenarios such as shale gas extraction and wet desulfurization tail gas monitoring, the measured gas often contains liquid droplets (such as water mist, condensate oil) and oil mist, forming a complex gas-liquid two-phase or even gas-liquid-solid multiphase flow. Traditional measurement schemes rely on external separation devices to remove the liquid phase before measuring the pure gas flow to ensure measurement accuracy, but this increases the complexity and maintenance cost of the system.

[0003] Most existing improved swirling vortex flowmeters are equipped with wire mesh demisters at the inlet section to intercept large liquid droplets and coated with superhydrophobic coatings on the inner wall of the flow channel to reduce liquid droplet adhesion; although these methods improve the measurement environment to a certain extent, in practical applications, the wire mesh demister is prone to blockage after long-term use and requires frequent maintenance; at the same time, due to the poor abrasion resistance of the coating inside the pipeline, the superhydrophobic coating has poor effect in the face of high-viscosity oil mist, resulting in oil mist being easily attached to the sensor surface, thereby reducing the sensitivity of the sensor and the accuracy of the measurement results. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a self-cleaning swirling vortex gas flowmeter, aiming to solve the above technical problems.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A self-cleaning swirling vortex gas flowmeter includes a housing and a flowmeter installed on the outer surface of the housing. An extension pipe is fixedly connected to the air inlet end of the housing, and a buffer mechanism is arranged on the air inlet side of the extension pipe. The buffer mechanism includes a filtering chamber, and a multi-layer filtering component for intercepting liquid droplets and oil mist in the gas containing impurities is arranged inside the filtering chamber. A replenishment mechanism is arranged at the top of the filtering chamber to provide new adsorption filter elements, and a dissolution tank is fixedly connected to the bottom of the filtering chamber. And a shear breaking module for cleaning the intercepted oil mist and heavy oil is arranged at the inner top of the dissolution tank; Among them, the multi-layer filtering component includes a detachable adsorption filter element. First intercepting plates and second intercepting plates are symmetrically arranged on both sides of the outer surface of the adsorption filter element respectively. And a receiving frame is fixedly connected to the outer circular surfaces of both sides of the first intercepting plate and the second intercepting plate. Card slots are opened inside the receiving frame, and a resisting baffle for supporting the adsorption filter element is jointly arranged at the inner bottoms of the first intercepting plate and the second intercepting plate; The buffer mechanism further includes a first sealing plate and a second sealing plate disposed at the top and the inner bottom of the filtration chamber, and an auxiliary mechanism and a driving mechanism for controlling the opening and closing of the first sealing plate and the second sealing plate are respectively disposed on one side inside the filtration chamber, so as to realize the sealing switching of the gas channel during the replacement of the multi-layer filtration components and ensure the measurement continuity.

[0007] As a further solution of the present invention: the replenishment mechanism includes a filter element magazine fixedly connected to the top of the filtration chamber. Both sides inside the filter element magazine are fixedly connected with brackets, and the top ends of the brackets are fixedly connected with clamping seats. A new adsorption filter element is clamped inside the clamping seats. A sealing cover is sleeved on the top of the filter element magazine, and limiting plates are fixedly connected to both sides of the outer surface of the sealing cover. Fixing plates for fixing the limiting plates are arranged on both sides of the top of the filter element magazine; a spray plate is fixedly connected inside the sealing cover; a feeding pipe is fixedly communicated with one side of the outer surface of the top end of the dissolution tank, and a water pump is fixedly communicated with one side of the bottom of the dissolution tank. The output end of the water pump is fixedly communicated with a conveying pipe, and one end of the conveying pipe is fixedly communicated with the spray plate to provide continuous cleaning liquid.

[0008] As a further solution of the present invention: the shearing and crushing module includes a first driving rod and a second driving rod rotatably connected to the inner top of the dissolution tank. One end of the first driving rod is fixedly connected with a third servo motor. A main gear is fixedly connected to one side of the first driving rod close to the third servo motor, and a driven gear fixedly connected with the second driving rod is arranged on the outer surface of the main gear. First extrusion cylinders and second extrusion cylinders are respectively fixedly connected to the outer circumferential surfaces of the first driving rod and the second driving rod; the first driving rod and the second driving rod rotate synchronously through the main gear and the driven gear, driving the first extrusion cylinder and the second extrusion cylinder to shear and crush the intercepted viscous oil stain and mix and degrade it with the solvent in the dissolution tank.

[0009] As a further solution of the present invention: the buffer mechanism further includes an annular plate fixedly connected to one side of the outer surface of the filtration chamber, and is connected to an external pipeline through the annular plate for gas transmission; T-shaped support plates are fixedly connected to both sides of the inner wall of the filtration chamber, and the receiving frame is limited and supported by passing through the card slots through the T-shaped support plates; receiving grooves are respectively formed in the inner top and the inner bottom of the filtration chamber, and a first sealing plate and a second sealing plate are respectively slidably connected to the inner parts of the receiving grooves at the inner top and the inner bottom; a replenishment feeding port and a recycling feeding port are respectively formed in one side of the top and one side of the bottom of the filtration chamber, and the positions of the first sealing plate and the second sealing plate are respectively controlled by the auxiliary mechanism and the driving mechanism to ensure that when replenishing or cleaning, the filtration chamber is closed to form a relatively sealed space.

[0010] As a further solution of the present invention: a self-cleaning scraper group for cleaning impurities on the surface of the first intercepting plate is further arranged inside the filtering chamber, and the closing of the second sealing plate is controlled by the driving mechanism and the self-cleaning scraper group is driven to clean the impurities attached to the surface of the first intercepting plate.

[0011] As a further solution of the present invention: the self-cleaning scraper group includes a rotating rod arranged at the central axis outside the first intercepting plate. One end of the rotating rod is provided with a scraper for cleaning the oil mist attached to the surface of the first intercepting plate, and the other end of the rotating rod is provided with a second limiting frame fixedly connected to the filtering chamber. A limiting sleeve is fixedly connected to the outer cylindrical surface of the rotating rod close to the scraper, and a supporting plate for supporting the rotating rod is arranged between the limiting sleeve and the scraper; a toothed ring for transmission is fixedly connected to the rotating rod close to the second limiting frame.

[0012] As a further solution of the present invention: storage boxes are fixedly connected to the upper and lower sides of the inner wall of the filtering chamber. The driving mechanism includes a second fixed rod arranged at the inner bottom of the filtering chamber. Both ends of the second fixed rod are fixedly connected with third limiting seats. A second lead screw parallel to the second fixed rod is rotatably connected inside the third limiting seat. One end of the second lead screw penetrates through the third limiting seat and is fixedly connected with a second servo motor, and the second servo motor is covered by the storage box at the inner bottom of the filtering chamber to prevent the second servo motor from being covered by impurities; a second auxiliary seat is jointly arranged on the outer cylindrical surfaces of the second lead screw and the second fixed rod. One side of the top of the second auxiliary seat is fixedly connected with a baffle plate, and the baffle plate is driven to move by the second lead screw to support or release the adsorption filter element.

[0013] As a further solution of the present invention: the bottom of the second auxiliary seat is in a convex shape and is fixedly connected with the second sealing plate. Chutes are opened at the inner top and inner bottom of the filtering chamber to facilitate the second auxiliary seat to drive the second sealing plate to slide and be received in the receiving groove; a driving gear meshed with the toothed ring is arranged on one side of the second lead screw close to the third limiting seat.

[0014] As a further solution of the present invention: the auxiliary mechanism includes a first servo motor fixedly connected to the storage box at the inner top of the filtering chamber. The output end of the first servo motor is fixedly connected with a first lead screw. A first limiting frame fixedly connected to the filtering chamber is arranged on the outer cylindrical surface of the first lead screw, and a first fixed rod parallel to the first lead screw is fixedly connected to one end of the first limiting frame. A first auxiliary seat fixedly connected with the first sealing plate is jointly arranged on the outer cylindrical surfaces of the first fixed rod and the first lead screw.

[0015] As a further solution of the present invention: the first servo motor drives the first screw to rotate to control the closure of the first sealing plate at the replenishment discharge port of the storage box, and cooperates with the replenishment mechanism to realize automatic replenishment of a new adsorption filter element.

[0016] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects: (1) This solution is provided with a multi-layer filter assembly, a replenishment mechanism, a dissolution box, a shearing and crushing module and a driving mechanism. After the impure gas first enters the filter chamber, it is filtered by the multi-layer filter assembly in three stages to prevent the oil mist and large particle droplets entrained in the gas from directly entering the shell and adhering to the sensor surface, affecting the measurement of the flow meter; and when the adsorption filter element is saturated and needs to be replaced, the adsorption filter element is made to slide into the dissolution box through the driving mechanism, and the shearing and crushing module is used to squeeze the residual oil mist to further deal with it for subsequent recovery or treatment, and then the new adsorption filter element is transported through the replenishment mechanism to ensure that the gas filtration process is continuous and uninterrupted, significantly reducing the need for manual cleaning, reducing operation and maintenance costs, and greatly improving the application performance of the vortex flowmeter under complex working conditions.

[0017] (2) By setting up a replenishment mechanism and a shearing and crushing module, during the replacement of the old adsorption filter element, the water pump can be started to pump the solvent in the dissolution box to the spray plate through the delivery pipe. This operation not only cleans the inside of the filter element magazine and the surface of the new adsorption filter element, but also removes impurity contamination during transportation and prevents the new adsorption filter element from decreasing its adsorption efficiency due to dust contamination. At the same time, the sprayed solvent can further rinse the impurities and oil mist on the first interception plate and the second interception plate. After the replacement and recovery of the adsorption filter element, the shearing and crushing module is used to shear and crush the viscous oil, which promotes the full mixing of the oil particles and the solvent and improves the degradation efficiency.

[0018] (3) Through the drive mechanism and the self-cleaning scraper group, during the process of replacing the adsorption filter element, the second servo motor is started to reverse, so that the second auxiliary seat moves inward, pushing the baffle plate to reset, and providing a stable support for the new adsorption filter element; and through the meshing transmission of the driving gear and the gear ring, the scraper at one end of the rotating rod makes a circular motion along the outer surface of the first intercepting plate, effectively removing the oil mist and particulate impurities attached thereto. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2Schematic diagram of the connection between the buffer mechanism and the extension tube of the present invention; Figure 3 Partial cross-sectional view of the filtration chamber of the present invention; Figure 4 Schematic diagram of the connection between the replenishment mechanism and the filtration chamber of the present invention; Figure 5 Internal connection schematic diagram of the filtration chamber of the present invention; Figure 6 Schematic diagram of the connection between the self-cleaning scraper group and the filtration chamber of the present invention; Figure 7 Schematic diagram of the connection between the driving mechanism, the self-cleaning scraper group, and the auxiliary mechanism of the present invention; Figure 8 Schematic diagram of the connection of the spray plate of the present invention; Figure 9 Structural schematic diagram of the shearing and crushing module of the present invention.

[0021] Reference numerals: 1. Housing; 2. Flow meter; 3. Extension tube; 4. Buffer mechanism; 41. Filtration chamber; 42. T-shaped support plate; 43. Storage groove; 44. First sealing plate; 45. Second sealing plate; 46. Storage box; 5. Ring plate; 6. Multi-layer filtration component; 61. Adsorption filter element; 62. First intercepting plate; 63. Second intercepting plate; 64. Support frame; 65. Baffle; 7. Auxiliary mechanism; 71. First servo motor; 72. First lead screw; 73. First auxiliary seat; 74. First limiting frame; 75. First fixing rod; 8. Self-cleaning scraper group; 81. Rotating rod; 82. Second limiting frame; 83. Support plate; 84. Scraper; 85. Tooth ring; 9. Driving mechanism; 91. Second fixing rod; 92. Third limiting seat; 93. Second lead screw; 94. Driving gear; 95. Second auxiliary seat; 96. Second servo motor; 10. Replenishment mechanism; 101. Filter element magazine; 102. Bracket; 103. Clamp; 104. New adsorption filter element; 105. Sealing cover; 106. Spray plate; 107. Water pump; 108. Delivery pipe; 109. Limiting plate; 11. Dissolving tank; 111. Feeding pipe; 12. Shearing and crushing module; 121. First driving rod; 122. Second driving rod; 123. Third servo motor; 124. Main gear; 125. Driven gear; 126. First extrusion cylinder; 127. Second extrusion cylinder.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0023] The following describes in detail a self-cleaning swirling vortex gas flowmeter provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0024] As Figures 1 to 9 shown, an embodiment of the present invention provides a self-cleaning swirling vortex gas flowmeter, including a housing 1 and a flow meter 2 installed on the outer surface of the housing 1. An extension pipe 3 is fixedly connected to the air inlet end of the housing 1. A buffer mechanism 4 is arranged on the air inlet side of the extension pipe 3. The buffer mechanism 4 includes a filtering chamber 41. A multi-layer filtering component 6 for intercepting droplets and oil mist in the gas containing impurities is arranged inside the filtering chamber 41. A replenishing mechanism 10 is arranged at the top of the filtering chamber 41 to provide a new adsorption filter element 104. The bottom of the filtering chamber 41 is fixedly connected to a dissolution tank 11, and a shearing and crushing module 12 for cleaning the intercepted oil mist and heavy oil is arranged at the inner top of the dissolution tank 11; Among them, the multi-layer filtering component 6 includes a detachable adsorption filter element 61. First intercepting plates 62 and second intercepting plates 63 are symmetrically arranged on both sides of the outer surface of the adsorption filter element 61 respectively. A receiving frame 64 is fixedly connected to both sides of the outer circular surface of the first intercepting plate 62 and the second intercepting plate 63. A clamping groove is formed inside the receiving frame 64. A baffle plate 65 for supporting the adsorption filter element 61 is jointly arranged at the inner bottom of the first intercepting plate 62 and the second intercepting plate 63; The buffer mechanism 4 further includes a first sealing plate 44 and a second sealing plate 45 arranged at the inner top and the inner bottom of the filtering chamber 41 respectively. An auxiliary mechanism 7 and a driving mechanism 9 for controlling the opening and closing of the first sealing plate 44 and the second sealing plate 45 are arranged on one side inside the filtering chamber 41 respectively, so as to realize the sealing switching of the gas channel during the replacement of the multi-layer filtering component 6 and ensure the measurement continuity.

[0025] In order to solve the problem that the existing vortex flowmeter has poor effect of super hydrophobic coating in the process of measuring impure gas, especially when facing high viscosity oil mist, which makes oil mist easily adhere to the sensor surface, thus affecting the sensitivity of the sensor and the accuracy of the measurement result, the above technical solution is adopted to solve the problem. The above technical solution mainly consists of a multi-layer filter assembly 6, a replenishment mechanism 10, a dissolution box 11, a shearing and crushing module 12 and a driving mechanism 9. The impure gas first enters the filter chamber 41, and passes through the first interception plate 62, the adsorption filter element 61 and the second interception plate 63 in sequence. Among them, the first interception plate 62 adopts a metal wire mesh with a pore size of 50μm, which can efficiently intercept large particle droplets; the adsorption filter element 61 uses super oleophilic material to further capture micron-level oil mist; the second interception plate 63 is composed of a gradient oleophobic fiber layer, and after surface modification, it is specially used to adsorb oil mist with a particle size in the range of 5~30μm to achieve secondary fine interception. The cavity formed by the first interception plate 62, the second interception plate 63 and the receiving frame 64 not only accommodates the adsorption filter element 61, but also provides necessary support for it through the baffle plate 65 to prevent it from being deformed by the impact of airflow. After the gas passes through the three-stage filtration, it will enter the housing 1 through the extension tube 3, and generate a stable vortex there. The precession frequency detected by the piezoelectric sensor is converted into a flow signal, which is finally accurately measured by the flow meter 2. Once the adsorption filter element 61 reaches the adsorption saturation state, the drive mechanism 9 will start to retract the second sealing plate 45 of the filter chamber 41, so that the saturated adsorption filter element 61 slides into the dissolution box 11. The dissolution box 11 has a built-in solvent that can effectively dissolve the intercepted oil mist and heavy oil. Subsequently, the shearing and crushing module 12 squeezes the adsorption filter element 61 to further process the residual oil mist for subsequent recovery or treatment. At the same time, when the adsorption filter element 61 needs to be replaced, the driving mechanism 9 will first close the second sealing plate 45, and then start the auxiliary mechanism 7 to open the first sealing plate 44, and the replenishing mechanism 10 will then transport the new adsorption filter element 104 to the cavity composed of the first interception plate 62, the second interception plate 63 and the receiving frame 64 to ensure that the gas filtration process continues without interruption. In summary, not only is the efficient interception of droplets, especially high-viscosity oil mist, achieved, and the risk of oil film adhesion on the sensor surface is reduced, but also the measurement interruption problem caused by traditional maintenance methods is avoided through the collaborative work between automated components, the need for manual cleaning is significantly reduced, the operation and maintenance costs are reduced, and the application performance of the vortex flowmeter under complex working conditions is greatly improved.

[0026] like Figure 1 , Figure 2 , Figure 4 , Figure 8As shown in the figure, the supply mechanism 10 includes a filter cartridge magazine 101 fixedly connected to the top of the filtration chamber 41. On both sides inside the filter cartridge magazine 101, there are fixedly connected brackets 102, and at the top of the brackets 102, there is fixedly connected a clamping seat 103. A new adsorption filter element 104 is clamped inside the clamping seat 103. A sealing cover 105 is sleeved on the top of the filter cartridge magazine 101, and on both sides of the outer surface of the sealing cover 105, there are fixedly connected limit plates 109. On both sides of the top of the filter cartridge magazine 101, there are fixed plates for fixing the limit plates 109; inside the sealing cover 105, there is fixedly connected a spray plate 106; on one side of the outer surface of the top of the dissolution tank 11, there is fixedly connected a feed pipe 111 in communication. On one side of the bottom of the dissolution tank 11, there is fixedly connected a water pump 107. The output end of the water pump 107 is fixedly connected to a delivery pipe 108, and one end of the delivery pipe 108 is fixedly connected to the spray plate 106 to provide continuous cleaning liquid.

[0027] As Figure 1 , Figure 3 , Figure 9 shown, the shearing and crushing module 12 includes a first driving rod 121 and a second driving rod 122 rotatably connected to the inner top of the dissolution tank 11. At one end of the first driving rod 121, there is fixedly connected a third servo motor 123. On one side of the first driving rod 121 close to the third servo motor 123, there is fixedly connected a main gear 124, and on the outer surface of the main gear 124, there is a driven gear 125 fixedly connected to the second driving rod 122. On the outer circumferential surfaces of the first driving rod 121 and the second driving rod 122, there are respectively fixedly connected a first extrusion cylinder 126 and a second extrusion cylinder 127; the first driving rod 121 and the second driving rod 122 rotate synchronously through the main gear 124, driving the first extrusion cylinder 126 and the second extrusion cylinder 127 to shear and crush the intercepted viscous oil stains and mix and degrade them with the solvent in the dissolution tank 11.

[0028] As Figure 1 , Figure 3 , Figure 5 , Figure 7 shown, the buffer mechanism 4 further includes an annular plate 5 fixedly connected to one side of the outer surface of the filtration chamber 41, and is connected to an external pipeline through the annular plate 5 for gas transportation; on both sides of the inner wall of the filtration chamber 41, there are fixedly connected T-shaped support plates 42, and the receiving frame 64 is limited and supported by passing through the card slots through the T-shaped support plates 42; on the inner top and inner bottom of the filtration chamber 41, there are respectively provided storage grooves 43, and a first sealing plate 44 and a second sealing plate 45 are respectively slidably connected inside the storage grooves 43 at the inner top and inner bottom; on one side of the top and one side of the bottom of the filtration chamber 41, there are respectively provided a supply feeding port and a recycling feeding port, and the positions of the first sealing plate 44 and the second sealing plate 45 are respectively controlled by the auxiliary mechanism 7 and the driving mechanism 9 to ensure that when supplying or cleaning, the filtration chamber 41 is closed to form a relatively airtight space.

[0029] When the adsorption filter element 61 in the multi-layer filter assembly 6 reaches adsorption saturation, first start the driving mechanism 9, control the second sealing plate 45 to retract into the storage groove 43 at the inner bottom of the filter chamber 41, thereby opening the recovery and discharging port of the filter chamber 41. At this time, the saturated old adsorption filter element 61 slides down from this opening into the dissolution tank 11. Once the old adsorption filter element 61 is recovered into the dissolution tank 11, start the driving mechanism 9 again to make the second sealing plate 45 re-close the recovery and discharging port, and start the auxiliary mechanism 7 to retract the first sealing plate 44 into the storage groove 43 at the inner top of the filter chamber 41 to open the supply and discharging port. This enables the new adsorption filter elements 104 in the filter element magazine 101 to be vertically stacked through the card seats 103 and guided and supported by the bracket 102, and then slide into the cavity jointly formed by the first baffle plate 62, the second baffle plate 63 and the receiving frame 64 under the action of gravity to replace the old adsorption filter element 61. During the replacement process, the baffle plate 65 provides necessary support for the new adsorption filter element 104.

[0030] During the replacement of the old adsorption filter element 61, the water pump 107 can be started to pump the solvent in the dissolution tank 11 to the spray plate 106 through the delivery pipe 108. This operation not only cleans the inside of the filter element magazine 101 and the surface of the new adsorption filter element 104, removes the impurity pollution during transportation, and prevents the adsorption efficiency of the new adsorption filter element 104 from decreasing due to dust pollution; at the same time, the sprayed solvent can further wash the impurities and oil mist on the first baffle plate 62 and the second baffle plate 63; during this process, the sealing cover 105 is locked with the fixed plate through the limiting plate 109 to ensure the good airtightness of the filter element magazine 101.

[0031] After replacing and recycling the adsorption filter element, the drive mechanism 9 extends the first sealing plate 44 and the second sealing plate 45 to close the supply and discharge opening and the recycling and discharge opening of the filtration chamber 41, ensuring that the gas can flow into the housing 1 normally after filtration and adsorption, so that the flow meter 2 can continue to work stably. For the treatment of the old adsorption filter element 61 after it enters the dissolution tank 11, the third servo motor 123 is started to drive the first drive rod 121 to rotate the main gear 124, and the driven gear 125 is driven to rotate the second drive rod 122 in reverse synchronously through gear meshing. Since the surfaces of the first extrusion cylinder 126 and the second extrusion cylinder 127 are provided with an interlaced tooth-shaped structure, they can shear and break the viscous oil stains falling into the dissolution tank 11 and decompose the oil mist agglomerates. In addition, the solvent (such as biodegradable enzyme solution) pre-installed in the dissolution tank 11 in the feed pipe 111 promotes the full mixing of the oil stain particles and the solvent during the process of shearing and breaking the viscous oil stains by the shearing and breaking module 12, improving the degradation efficiency. Finally, the degraded waste liquid is discharged through the bottom sewage valve, and the residual solid impurities are compressed into blocks by the first extrusion cylinder 126 and the second extrusion cylinder 127 for centralized recycling and treatment. The entire operation process not only improves the convenience and efficiency of equipment maintenance, but also significantly reduces the operation and maintenance costs, providing a more reliable solution for the flow measurement of gas containing impurities.

[0032] As Figure 3 , Figure 6 , Figure 7 shown, a self-cleaning scraper group 8 for cleaning the impurities on the surface of the first intercepting plate 62 is further arranged inside the filtration chamber 41, and the closing of the second sealing plate 45 is controlled by the drive mechanism 9 and the self-cleaning scraper group 8 is driven to clean the impurities attached to the surface of the first intercepting plate 62.

[0033] As Figure 3 , Figure 6 , Figure 7 shown, the self-cleaning scraper group 8 includes a rotating rod 81 arranged at the central axis outside the first intercepting plate 62. One end of the rotating rod 81 is provided with a scraper 84 for cleaning the oil mist attached to the surface of the first intercepting plate 62, and the other end of the rotating rod 81 is provided with a second limiting frame 82 fixedly connected to the filtration chamber 41. A limiting sleeve is fixedly connected to the outer cylindrical surface of the rotating rod 81 near the scraper 84, and a support plate 83 for supporting the rotating rod 81 is arranged between the limiting sleeve and the scraper 84; a toothed ring 85 for transmission is fixedly connected to the side of the rotating rod 81 near the second limiting frame 82.

[0034] As Figure 6 , Figure 7As shown, storage boxes 46 are fixedly connected to both the upper and lower sides of the inner wall of the filtration chamber 41. The driving mechanism 9 includes a second fixed rod 91 disposed at the inner bottom of the filtration chamber 41. Both ends of the second fixed rod 91 are fixedly connected with third limit seats 92. A second lead screw 93 flush with the second fixed rod 91 is rotatably connected inside the third limit seat 92. One end of the second lead screw 93 penetrates through the third limit seat 92 and is fixedly connected with a second servo motor 96, and the second servo motor 96 is covered in the storage box 46 at the inner bottom of the filtration chamber 41 to prevent the second servo motor 96 from being covered by impurities. A second auxiliary seat 95 is jointly arranged on the outer circumferential surfaces of the second lead screw 93 and the second fixed rod 91. One side of the top of the second auxiliary seat 95 is fixedly connected with the baffle plate 65, and the baffle plate 65 is driven to move by the second lead screw 93 to support or release the adsorption filter element 61.

[0035] As Figure 6 , Figure 7 shown, the bottom of the second auxiliary seat 95 is convex and is fixedly connected with the second sealing plate 45. Chute grooves are formed in the inner top and inner bottom of the filtration chamber 41 to facilitate the second auxiliary seat 95 to drive the second sealing plate 45 to slide and be received in the storage groove 43. A driving gear 94 meshing with the toothed ring 85 is arranged on one side of the second lead screw 93 close to the third limit seat 92.

[0036] During the process of replacing the adsorption filter element 61, first start the second servo motor 96 to make the second lead screw 93 start to rotate. Since the second lead screw 93 and the second auxiliary seat 95 are connected by screw threads, the rotational motion is converted into a linear motion, prompting the second auxiliary seat 95 to move horizontally along the second fixed rod 91. When the second auxiliary seat 95 moves outwards, it drives the baffle plate 65 to retract synchronously, thereby releasing the old adsorption filter element 61, and enabling it to slide into the dissolution tank 11 due to gravity. When a new adsorption filter element 104 needs to be installed into the cavity jointly formed by the first intercepting plate 62, the second intercepting plate 63 and the bearing frame 64, then start the second servo motor 96 to reverse again, so that the second auxiliary seat 95 moves inwards, pushing the baffle plate 65 to reset and providing a stable support for the new adsorption filter element 104.

[0037] Meanwhile, during the rotation of the second lead screw 93, the drive gear 94 also rotates accordingly. Through the meshing drive with the toothed ring 85, the rotating rod 81 is driven to rotate between the second limiting frame 82 and the support plate 83. This causes the scraper 84 fixed to one end of the rotating rod 81 to perform a circular motion along the outer surface of the first intercepting plate 62, effectively removing the attached oil mist and particulate impurities. The scraper 84 is made of polytetrafluoroethylene material, ensuring an efficient cleaning effect. In addition, the support plate 83 provides necessary rigid support between the scraper 84 and the limiting sleeve, preventing the rotating rod 81 from deforming due to uneven force. As for the cleaned oil stains, they will slide down to the bottom of the filtering chamber 41 due to gravity and enter the dissolving tank 11 through the recovery discharge opening for further treatment. For the entire operation process, not only is the replacement process of the adsorption filter element simplified, the equipment maintenance efficiency improved, but also the continuous cleaning of the surface of the first intercepting plate 62 is ensured, reducing the influence of oil mist and particulate impurities on subsequent measurements. The entire operation process realizes automatic control, reduces the need for manual intervention, and significantly improves the stability and reliability of the equipment operation.

[0038] As Figure 5 , Figure 6 , Figure 7 shown, the auxiliary mechanism 7 includes a first servo motor 71 fixedly connected to the storage box 46 at the inner top of the filtering chamber 41. The output end of the first servo motor 71 is fixedly connected with a first lead screw 72. The outer cylindrical surface of the first lead screw 72 is provided with a first limiting frame 74 fixedly connected to the filtering chamber 41, and one end of the first limiting frame 74 is fixedly connected with a first fixing rod 75 flush with the first lead screw 72. A first auxiliary seat 73 fixedly connected to the first sealing plate 44 is jointly arranged on the outer cylindrical surfaces of the first fixing rod 75 and the first lead screw 72.

[0039] As Figure 5 , Figure 6 , Figure 7 shown, the first servo motor 71 drives the first lead screw 72 to rotate to control the closing of the first sealing plate 44 at the supply and discharge opening of the storage box 41, and cooperates with the supply mechanism 10 to realize the automatic supply of new adsorption filter elements 104.

[0040] When the adsorption filter element 61 reaches its preset saturation maintenance period, first, the driving mechanism 9 is reversely operated, so that the second sealing plate 45 and the baffle 65 are retracted, and the recovery discharge port of the filtration chamber 41 is opened. The old adsorption filter element 61 thus slides into the dissolution tank 11 for treatment. Once the old adsorption filter element 61 completely slides into the dissolution tank 11, the driving mechanism 9 is started again to re-close the recovery discharge port of the filtration chamber 41 with the second sealing plate 45 and reset the baffle 65 to its initial position, that is, to provide limit support for the bottoms of the first intercepting plate 62 and the second intercepting plate 63. Next, the first servo motor 71 in the auxiliary mechanism 7 is started to drive the first lead screw 72 to rotate. Since the first lead screw 72 is threadedly connected to the first auxiliary seat 73, the first auxiliary seat 73 moves horizontally along the first fixed rod 75 fixed in the filtration chamber 41. This action drives the first sealing plate 44 fixedly connected to the first auxiliary seat 73 to slide along the chute at the top of the filtration chamber 41 and be received in the receiving groove 43 at the top of the filtration chamber 41, thereby opening the supply discharge port. At this time, the new adsorption filter element 104 in the filter element magazine 101 naturally slides into the cavity jointly formed by the first intercepting plate 62, the second intercepting plate 63, and the receiving frame 64 due to gravity, quickly completing the replacement process. After the installation of the new adsorption filter element 104 is completed, the first servo motor 71 reverses to drive the first lead screw 72 to rotate in the reverse direction, so that the first auxiliary seat 73 and the connected first sealing plate 44 are reset to close the supply discharge port, effectively preventing untreated impurity gas from directly entering the housing 1 and ensuring that the flow meter 2 can accurately measure. When both the first sealing plate 44 and the second sealing plate 45 are completely closed, the external impurity gas will be normally filtered and adsorbed, avoiding the direct adsorption of oil mist on the pressure sensor and ensuring the accuracy and reliability of the flow meter 2.

[0041] When the present invention is in use, the gas containing impurities first enters the filtering chamber 41 and successively passes through the first intercepting plate 62, the adsorption filter element 61 and the second intercepting plate 63. Among them, the first intercepting plate 62 is made of a metal wire mesh with a pore diameter of 50 μm and is used to efficiently intercept large droplet liquid; the adsorption filter element 61 uses a super-lipophilic material to further capture micron-sized oil mist; the second intercepting plate 63 is composed of a gradient oil-repellent fiber layer and has undergone surface modification treatment, specifically adsorbing oil mist with a particle size in the range of 5-30 μm to achieve secondary fine interception. These components together form a cavity to accommodate the adsorption filter element 61 and provide necessary support through the baffle 65 to prevent it from deforming due to air flow impact. When the gas passes through three-stage filtration, it enters the housing 1 through the extension pipe 3, where a stable vortex is generated, and the precession frequency detected by the piezoelectric sensor is converted into a flow signal, which is finally accurately measured by the flow meter 2. Once the adsorption filter element 61 reaches the adsorption saturation state, the driving mechanism 9 is activated to retract the second sealing plate 45 of the filtering chamber 41, causing the saturated adsorption filter element 61 to slide into the dissolution tank 11. The dissolution tank 11 is internally provided with a solvent, which can effectively dissolve the intercepted oil mist and heavy oil. Subsequently, the shearing and crushing module 12 performs an extrusion operation on the adsorption filter element 61 to further process the residual oil mist for subsequent recovery or treatment. During the replacement of the old adsorption filter element 61, the second servo motor 96 is started to rotate the second lead screw 93, driving the second auxiliary seat 95 to move horizontally, releasing the old adsorption filter element 61, which slides into the dissolution tank 11 due to gravity. Meanwhile, during the rotation of the second lead screw 93, the driving gear 94 drives the toothed ring 85, causing the scraper 84 on the rotating rod 81 to perform a circular motion along the outer surface of the first intercepting plate 62 to remove the attached oil mist and particulate impurities. After the old adsorption filter element 61 completely slides into the dissolution tank 11, the driving mechanism 9 is started again to re-close the recovery and discharge opening of the filtering chamber 41 with the second sealing plate 45 and reset the baffle 65. Then, the first servo motor 71 in the auxiliary mechanism 7 is started to drive the first lead screw 72 to rotate, driving the first sealing plate 44 to open the supply and discharge opening. The new adsorption filter element 104 located in the filter element magazine 101 naturally slides into the cavity jointly formed by the first intercepting plate 62, the second intercepting plate 63 and the receiving frame 64 due to gravity, quickly completing the replacement process. At the same time, the water pump 107 can pump the solvent in the dissolution tank 11 to the spray plate 106 to clean the inside of the filter element magazine 101 and the surface of the new adsorption filter element 104 to remove the impurity pollution during transportation. In addition, for the treatment of the old adsorption filter element 61 after it enters the dissolution tank 11, the third servo motor 123 drives the shearing and crushing module 12 to shear and crush the viscous oil stain and fully mix and degrade it with the solvent, improving the waste liquid treatment efficiency. Finally, the degraded waste liquid is discharged through the bottom sewage valve, and the residual solid impurities are compressed into blocks for centralized recovery and treatment.

[0042] The present invention covers any alternatives, modifications, equivalent methods, and solutions made to the essence and scope of the present invention. To enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements can be made without departing from the principle of the present invention, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A self-cleaning vortex gas flowmeter, comprising a housing and a flow meter mounted on the outer surface of the housing, characterized in that: The air inlet end of the shell is fixedly connected with an extension pipe, and a buffer mechanism is arranged on the air inlet side of the extension pipe. The buffer mechanism includes a filter chamber, and a multi-layer filter assembly is arranged inside the filter chamber to intercept droplets and oil mist in the impurity-containing gas. A supply mechanism is arranged on the top of the filter chamber to provide a new adsorption filter element. The bottom of the filter chamber is fixedly connected with a dissolution box, and a shearing and crushing module for cleaning the intercepted oil mist and heavy oil is arranged on the inner top of the dissolution box. The multi-layer filter assembly includes a detachable adsorption filter element, and a first interception plate and a second interception plate are symmetrically arranged on both sides of the outer surface of the adsorption filter element, and a receiving frame is fixedly connected to both sides of the outer circumference of the first interception plate and the second interception plate, and a card slot is provided inside the receiving frame, and a baffle plate for supporting the adsorption filter element is arranged on the inner bottom of the first interception plate and the second interception plate; The buffer mechanism also includes a first sealing plate and a second sealing plate arranged at the top and bottom of the filter chamber, and an auxiliary mechanism and a driving mechanism for controlling the opening and closing of the first sealing plate and the second sealing plate are respectively arranged on one side of the interior of the filter chamber to achieve sealing switching of the gas channel when the multi-layer filter assembly is replaced to ensure measurement continuity.

2. A self-cleaning swirl gas flowmeter according to claim 1, characterized in that: The replenishing mechanism includes a filter cartridge magazine fixedly connected to the top of the filter chamber, brackets are fixedly connected to both sides of the interior of the filter cartridge magazine, and a holder is fixedly connected to the top of the bracket, a new adsorption filter cartridge is clamped inside the holder, a sealing cover is provided on the top of the filter cartridge magazine, and limit plates are fixedly connected to both sides of the outer surface of the sealing cover, and fixing plates for fixing the limit plates are provided on both sides of the top of the filter cartridge magazine; a spray plate is fixedly connected to the interior of the sealing cover; a feed pipe is fixedly connected to one side of the outer surface of the top of the dissolving box, a water pump is fixedly connected to one side of the bottom of the dissolving box, a delivery pipe is fixedly connected to the output end of the water pump, and one end of the delivery pipe is fixedly connected to the spray plate to provide continuous cleaning liquid.

3. A self-cleaning swirl gas flowmeter according to claim 2, characterized in that: The shearing and crushing module includes a first driving rod and a second driving rod rotatably connected to the top of the dissolving box, and one end of the first driving rod is fixedly connected to the third servo motor, and the first driving rod is fixedly connected to the side of the third servo motor close to the third servo motor, and the outer surface of the main gear is provided with a driven gear fixedly connected to the second driving rod, and the outer cylindrical surfaces of the first driving rod and the second driving rod are respectively fixedly connected to the first extrusion cylinder and the second extrusion cylinder; the first driving rod and the second driving rod rotate synchronously with the main gear through the main gear, driving the first extrusion cylinder and the second extrusion cylinder to shear and crush the intercepted viscous oil, and mix and degrade it with the solvent in the dissolving box.

4. A self-cleaning swirl gas flowmeter according to claim 3, characterized in that: The buffer mechanism also includes a circular ring plate fixedly connected to one side of the outer surface of the filter chamber, and is connected to an external pipeline through the circular ring plate for gas delivery; T-shaped support plates are fixedly connected to both sides of the inner wall of the filter chamber, and the T-shaped support plates penetrate the card slot to provide limited support for the receiving frame; storage grooves are provided at the top and bottom of the filter chamber, and the first sealing plate and the second sealing plate are slidably connected to the inside of the storage grooves at the top and bottom of the filter chamber respectively; a replenishment discharge port and a recovery discharge port are correspondingly provided on one side of the top and the bottom of the filter chamber, and the positions of the first sealing plate and the second sealing plate are respectively controlled by the auxiliary mechanism and the driving mechanism to ensure that the filter chamber is closed to form a relatively closed space during replenishment or cleaning.

5. A self-cleaning swirl gas flowmeter according to claim 4, characterized in that: A self-cleaning scraper group for cleaning impurities on the surface of the first interception plate is also provided inside the filter chamber, and the closing of the second sealing plate is controlled by a driving mechanism, and the self-cleaning scraper group is driven to clean impurities attached to the surface of the first interception plate.

6. A self-cleaning swirl gas flowmeter according to claim 5, characterized in that: The self-cleaning scraper group includes a rotating rod arranged at the central axis of the outer side of the first intercepting plate, one end of the rotating rod is provided with a scraper for cleaning the oil mist attached to the surface of the first intercepting plate, and the other end of the rotating rod is provided with a second limiting frame fixedly connected to the filter chamber, the outer cylindrical surface of the rotating rod is fixedly connected to a limiting sleeve on the side close to the scraper, and a support plate for supporting the rotating rod is provided between the limiting sleeve and the scraper; the rotating rod is fixedly connected to a gear ring for transmission on the side close to the second limiting frame.

7. A self-cleaning swirl gas flowmeter according to claim 6, characterized in that: The upper and lower sides of the inner wall of the filter chamber are fixedly connected to a storage box, and the driving mechanism includes a second fixed rod arranged at the bottom of the filter chamber, and both ends of the second fixed rod are fixedly connected to a third limit seat, and the internal rotation of the third limit seat is connected to a second screw rod flush with the second fixed rod, one end of the second screw rod passes through the third limit seat and is fixedly connected to a second servo motor, and the second servo motor is covered in the storage box at the bottom of the filter chamber to prevent the second servo motor from being covered by impurities; the second screw rod and the outer cylindrical surface of the second fixed rod are jointly provided with a second auxiliary seat, and one side of the top of the second auxiliary seat is fixedly connected to the back plate, and the back plate is driven to move by the second screw rod to support or release the adsorption filter element.

8. A self-cleaning swirl gas flowmeter according to claim 7, characterized in that: The bottom of the second auxiliary seat is in the shape of a bulge and is fixedly connected to the second sealing plate. Slide grooves are provided on the inner top and inner bottom of the filter chamber to facilitate the second auxiliary seat to drive the second sealing plate to slide and be stored in the storage groove; a driving gear meshing with a gear ring is provided on the side of the second screw rod close to the third limit seat.

9. A self-cleaning swirl gas flowmeter according to claim 8, characterized in that: The auxiliary mechanism includes a first servo motor fixedly connected to a top storage box in the filter chamber, the output end of the first servo motor is fixedly connected to a first screw rod, the outer cylindrical surface of the first screw rod is provided with a first limit frame fixedly connected to the filter chamber, and one end of the first limit frame is fixedly connected to a first fixing rod flush with the first screw rod, and the first fixing rod and the outer cylindrical surface of the first screw rod are jointly provided with a first auxiliary seat fixedly connected to the first sealing plate.

10. A self-cleaning swirl gas flowmeter according to claim 9, characterized in that: The first servo motor drives the first screw to rotate to control the closing of the first sealing plate at the replenishment and discharge port of the storage box, and cooperates with the replenishment mechanism to realize automatic replenishment of a new adsorption filter element.

Images