CN113670402A - Natural gas flow detection device and method - Google Patents
Natural gas flow detection device and method Download PDFInfo
- Publication number
- CN113670402A CN113670402A CN202111033974.6A CN202111033974A CN113670402A CN 113670402 A CN113670402 A CN 113670402A CN 202111033974 A CN202111033974 A CN 202111033974A CN 113670402 A CN113670402 A CN 113670402A
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- air guide
- ring
- detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 97
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000003345 natural gas Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 114
- 239000000523 sample Substances 0.000 claims description 16
- 238000007664 blowing Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 13
- 239000000428 dust Substances 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 10
- 239000002390 adhesive tape Substances 0.000 claims description 9
- 238000012423 maintenance Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000011001 backwashing Methods 0.000 claims description 4
- 230000007774 longterm Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 206010040007 Sense of oppression Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
- G01F15/125—Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/12—Cleaning arrangements; Filters
Abstract
The invention discloses a natural gas flow detection device and a method, which comprises a detection shell communicated with a communicating pipe, wherein the detection shell is connected with the communicating pipe through welding or a flange, a flow detection assembly for detecting the flow of natural gas is arranged on the detection shell, and a filtering assembly for eliminating impurities in the natural gas is also arranged on the detection shell at the upstream of the flow detection assembly.
Description
Technical Field
The invention relates to the technical field of natural gas detection, in particular to a natural gas flow detection device and a natural gas flow detection method.
Background
Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the air space, water space and rock space (including oil field gas, gas field gas, mud volcanic gas, coal bed gas, biogenetic gas and the like). The definition of "natural gas" which has been commonly used for a long time is a narrow definition from the viewpoint of energy.
The turbine flowmeter has the characteristics of lightning protection, no external power interference, low cost and the like, is widely applied to the field of metering of natural gas, and can cause the actual flow of the natural gas to be different from the detection due to the difference of the impurity concentration in the natural gas when the flow is detected, so that the detection is not accurate enough.
Disclosure of Invention
The present invention is directed to a natural gas flow rate detecting device and method to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a natural gas flow detection device comprises a detection shell communicated with a communicating pipe, wherein the detection shell is connected with the communicating pipe through welding or a flange, a flow detection assembly for detecting the flow of natural gas is arranged on the detection shell, and a filtering assembly for eliminating impurities in the natural gas is also arranged on the detection shell at the upstream of the flow detection assembly;
the filter assembly comprises a cleaning shell arranged outside the detection shell, a second valve seat is arranged inside the detection shell where the cleaning shell is arranged, a second valve core matched with the second valve seat is arranged in the second valve seat, a first air guide channel and a second air guide channel which are vertically arranged are arranged in the second valve core, the first air guide channel and the second air guide channel are arranged in a staggered manner, the second air guide channel is internally provided with a filter element, the first air guide channel is internally provided with an auxiliary filter screen, the auxiliary filter screen is detachably arranged in the first air guide channel, the upper side and the lower side of the detection shell where the cleaning shell is arranged are respectively provided with a first opening and a second opening, the side surface of the second valve core is connected with a second motor for driving the second valve core to rotate, the second valve core is driven to rotate by the second motor, so that the first air guide channel and the second air guide channel are communicated with the inner cavity of the detection shell in turn.
As a further scheme of the invention: it sets up the piston ring in the second air guide channel including sliding to filter, install on the piston ring and be used for carrying out filterable filter block to the natural gas, filter block inboard side piece through second spring and second air guide channel inner wall is connected fixedly, be equipped with the pressure test piece with controller electric connection on the side piece, the output and the second motor control end electric connection of controller, when filter block normally filters, the oppression can not received to the pressure test piece, when the filter block appears blockking up, the filter block can further oppress the second spring to produce bigger pressure to the side piece.
As a further scheme of the invention: the inside clear hole spare that utilizes natural gas pneumatic energy to carry out filterable to the filter block as power that still is equipped with of clearance shell, clear hole spare sets up the swivel becket in first opening upper end including rotating, the inside flabellum that is used for producing blowing that is equipped with of swivel becket, the clearance shell outside at swivel becket place is equipped with the inlet port, be equipped with on the inlet port and be used for carrying out filterable air filter screen to the air, the second opening part is equipped with and is used for scraping the material mechanism to the filter block filtering surface, it includes the clearance dish to scrape the material mechanism, clearance dish up end is equipped with the clearance brush that is used for scraping the material, swivel becket and clearance dish are connected and are used for driving its driving piece that rotates in order to produce clear hole power.
As a further scheme of the invention: the driving piece comprises a rotating outer ring and a rotating inner ring, the rotating outer ring is rotatably sleeved on the outer side of the detection shell, the rotating inner ring is rotatably connected with the rotating outer ring through a fixed bearing, a plurality of second magnet blocks are distributed in an array manner in the rotating inner ring, a plurality of first magnet blocks are distributed in an array manner in the rotating outer ring, the first magnet blocks and the second magnet blocks are mutually attracted, a rotating blade used for acquiring fluid kinetic energy is arranged on the inner side of the rotating inner ring, when natural gas flows in the detection shell, the rotating blade can drive the rotating inner ring to rapidly rotate, the rotating outer ring can also rotate together under the action of magnetic force so as to acquire power, a fixed shaft is rotated at the upper end of the detection shell, a second gear is arranged on the fixed shaft, and the second gear is mutually meshed with a gear ring surface on the outer side of the rotating outer ring, the right side of the second gear is meshed with the gear ring surface on the outer side of the rotating ring, so that the rotating ring can be driven to rotate by rotating the outer ring, air blowing power is obtained, and air flow generated by air blowing can carry out backwashing treatment on the filter blocks in the first air guide channel or the second air guide channel;
the driving piece further comprises a first gear meshed with the gear ring surface on the outer side of the first gear, the fixed shaft of the first gear is rotatably connected with the detection shell, a second belt wheel is arranged on the fixed shaft of the first gear, and the second belt wheel is connected with the first belt wheel on the fixed shaft of the cleaning disc through a transmission belt.
As a further scheme of the invention: the first belt wheel is an eccentric belt wheel, the lower end of a fixed shaft of the first belt wheel is rotatably connected with the upper end of a sliding seat, the sliding seat is slidably arranged at the inner bottom of the cleaning shell, a guide rod is arranged at the right end of the sliding seat, the guide rod slidably penetrates through a positioning sleeve arranged at the inner bottom of the cleaning shell, the sliding seat and the positioning sleeve are fixedly connected through a first spring, and the first belt wheel is an eccentric wheel, so that the first belt wheel can be matched with the reset of the first spring when rotating, the sliding seat can slide left and right in a reciprocating manner along the guide rod, the cleaning disc can also move in a reciprocating manner when rotating rapidly, and the cleaning effect is improved;
the cleaning brush is characterized in that a polarizing hole with a rectangular cross section is formed in the middle of the lower end of the cleaning disc, the polarizing hole is in sliding fit with the top of a fixing shaft at the lower end of the cleaning disc, a polarizing spring is arranged in the polarizing hole, a plurality of protruding blocks are distributed at the lower end of the cleaning disc in an array mode, at least one pressing wheel arranged below the cleaning disc and used for intermittently pressing the protruding blocks is arranged inside the cleaning shell, and the pressing wheel can be matched with the protruding blocks when the cleaning disc rotates rapidly, so that the cleaning brush can shake up and down to clean the hole.
As a further scheme of the invention: the cleaning disc is characterized in that a bearing ring is arranged on the outer side of the cleaning disc in a rotating mode, the outer ring of the bearing ring is fixedly connected with a buffer cover through an elastic adhesive tape, the buffer cover covers the second opening, a slag discharge pipe used for discharging cleaned dust is arranged on the outer side of the buffer cover, the slag discharge pipe penetrates through the cleaning shell, when the cleaning disc swings, the elastic adhesive tape is arranged so that the deviation of the elastic adhesive tape cannot affect the buffer cover, the dust generated by cleaning can be collected in the buffer cover, and the dust can be discharged along the slag discharge pipe under the guide of airflow.
As a further scheme of the invention: the flow detection subassembly is including setting up the mount pad on detecting the shell, the panel board that is used for showing the flow is installed to the mount pad upper end, the input of panel board is equipped with and is used for stretching into the inside test probe of detecting the shell, be equipped with on the detecting the shell and be used for conveniently carrying out the maintenance subassembly of maintaining test probe.
As a still further scheme of the invention: the maintenance assembly comprises a first valve seat arranged inside the detection shell, the position of the first valve seat corresponds to that of the mounting seat, a first valve core is arranged in the first valve seat in a rotating fit mode, a detection channel corresponding to the position of the detection probe is formed in the first valve core, a rotary seal is formed between the mounting shaft of the detection probe and the first valve core, a cleaning pipeline matched with the first valve core is arranged on the outer side of the detection shell, a second air guide channel is arranged at the outer end opening of the cleaning pipeline in a matching mode, and the lower end of the first valve seat is connected with a first motor used for driving the first valve seat to rotate.
Compared with the prior art, the invention has the beneficial effects that:
the device is designed aiming at the defects of the existing device, can maintain the detection end, avoids the problem of disassembly and assembly, improves the maintenance efficiency, and can filter the natural gas to be detected, avoid the influence of impurities in the natural gas on the detection and improve the detection accuracy;
the method has the advantages that impurities generated by filtering the natural gas can be automatically removed, the long-term filtering effect is guaranteed, and the whole cleaning process is realized by utilizing the kinetic energy of the natural gas without adding extra hole cleaning power;
the clear hole mode in this application adopts the mode that air current backwash and filter end scraped the material, has guaranteed the clearance effect.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the internal structure of the present invention.
Fig. 3 is a schematic structural view of the cleaning disc and the second pulley in the present invention.
Fig. 4 is a schematic structural diagram of a cache mask according to the present invention.
Fig. 5 is a partial enlarged view of the structure of the present invention.
Wherein: the device comprises a detection shell 11, a detection probe 12, a first valve core 13, a first valve seat 14, a slag discharge pipe 15, a buffer cover 16, a pressing wheel 17, a guide rod 18, a positioning sleeve 19, a second valve core 20, a first spring 21, a sliding seat 22, a first belt wheel 23, a cleaning disc 24, a convex block 25, a cleaning brush 26, a second belt wheel 27, a transmission belt 28, a first gear 29, a second spring 30, a rotating blade 31, a communication pipe 32 and a filter block 33, the air conditioner comprises a rotary inner ring 34, a fixed bearing 35, a rotary outer ring 36, a first magnet block 37, a second gear 38, a rotary ring 39, fan blades 40, an air inlet filter screen 41, a first opening 42, an air inlet port 43, a first air guide channel 44, a second valve seat 45, a second air guide channel 46, an instrument panel 47, a mounting seat 48, a detection channel 49, a cleaning pipeline 50, a first motor 51, a second motor 52, a controller 53, a cleaning shell 54 and an auxiliary filter screen 55.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1 to 5, in an embodiment of the present invention, a natural gas flow detecting apparatus includes a detecting housing 11 communicated with a communicating pipe 32, where the detecting housing 11 is connected with the communicating pipe 32 by welding or flange, a flow detecting assembly for detecting a flow of natural gas is disposed on the detecting housing 11, and a filtering assembly for eliminating impurities in natural gas is further disposed on the detecting housing 11 at an upstream of the flow detecting assembly;
the filter assembly comprises a cleaning shell 54 arranged outside the detection shell 11, a second valve seat 45 is arranged inside the detection shell 11 where the cleaning shell 54 is located, a second valve core 20 matched with the second valve seat 45 is arranged in the second valve seat 45, two first air guide channels 44 and two second air guide channels 46 which are vertically arranged are arranged in the second valve core 20, the first air guide channels 44 and the second air guide channels 46 are arranged in a staggered mode, a filter element is arranged inside the second air guide channel 46, an auxiliary filter screen 55 is arranged in the first air guide channel 44, the auxiliary filter screen 55 is detachably arranged in the first air guide channel 44, the auxiliary filter screen 55 is in threaded connection with the first air guide channel 44, a slot convenient for inserting a screwdriver is formed in the auxiliary filter screen 55, a first opening 42 and a second opening are respectively arranged on the upper side and the lower side of the detection shell 11 where the cleaning shell 54 is located, the second motor 52 for driving the second valve core 20 to rotate is connected to the side surface of the second valve core 20, and the second motor 52 drives the second valve core 20 to rotate, so that the first air guide channel 44 and the second air guide channel 46 are communicated with the inner cavity of the detection shell 11 in turn, and thus, when the filter element is cleaned, the auxiliary filter screen 55 can work instead, the problem of shutdown is avoided, and the problem of blockage is avoided;
the filter element comprises a piston ring which is arranged in the second air guide channel 46 in a sliding manner, a filter block 33 for filtering natural gas is arranged on the piston ring, the inner side of the filter block 33 is fixedly connected with a side block on the inner wall of the second air guide channel 46 through a second spring 30, a pressure test block which is electrically connected with a controller 53 is arranged on the side block, the output end of the controller 53 is electrically connected with the control end of a second motor 52, when the filter block 33 filters normally, the pressure test block cannot be pressed, when the filter block 33 is blocked, the filter block 33 further presses the second spring 30, so that greater pressure is generated on the side block, when the pressure reaches a set value (the filter hole is seriously blocked, and the pressure test block cannot be subjected to such large pressure only after cleaning is finished), at this moment, the second motor 52 drives the second valve core 20 to rotate, thereby achieving switching of the passage between the second air guide passage 46 and the first air guide passage 44;
the cleaning shell 54 is also internally provided with a hole cleaning piece for filtering the filter block 33 by using natural pneumatic energy as power, the hole cleaning piece comprises a rotating ring 39 which is rotatably arranged at the upper end of the first opening 42, fan blades 40 for generating air blowing are arranged in the rotating ring 39, an air inlet port 43 is arranged at the outer side of the cleaning shell 54 where the rotating ring 39 is arranged, an air inlet filter screen 41 for filtering air is arranged on the air inlet port 43, a scraping mechanism for scraping the filter surface of the filter block 33 is arranged at the second opening, the scraping mechanism comprises a cleaning disc 24, a cleaning brush 26 for scraping materials is arranged at the upper end surface of the cleaning disc 24, and the rotating ring 39 and the cleaning disc 24 are connected with a driving piece for driving the rotating piece to generate hole cleaning power;
the driving piece comprises a rotating outer ring 36 which is rotatably sleeved on the outer side of the detection shell 11 and a rotating inner ring 34 which is rotatably arranged on the inner side of the detection shell 11, the rotating inner ring 34 and the rotating outer ring 36 are rotatably connected through a fixed bearing 35, a plurality of second magnet blocks are distributed in the rotating inner ring 34 in an array manner, a plurality of first magnet blocks 37 are distributed in the rotating outer ring 36 in an array manner, the first magnet blocks 37 and the second magnet blocks are mutually attracted, a rotating blade 31 for acquiring fluid kinetic energy is arranged on the inner side of the rotating inner ring 34, when natural gas flows in the detection shell 11, the rotating blade 31 can drive the rotating inner ring 34 to rotate rapidly, the rotating outer ring 36 can also rotate together under the action of magnetic force so as to acquire power, a fixed shaft is rotated at the upper end of the detection shell 11, and a second gear 38 is arranged on the fixed shaft, the second gear 38 is meshed with a gear ring surface on the outer side of the rotary outer ring 36, the right side of the second gear 38 is meshed with a gear ring surface on the outer side of the rotary ring 39, so that the rotary ring 39 is driven to rotate through the rotary outer ring 36, blowing power is obtained, and air flow generated by blowing can carry out backwashing treatment on the filter blocks 33 in the first air guide channel 44 or the second air guide channel 46;
the driving piece further comprises a first gear 29 meshed with a gear ring surface on the outer side of the first gear 29, a fixed shaft of the first gear 29 is rotatably connected with the detection shell 11, a second belt wheel 27 is arranged on the fixed shaft of the first gear 29, the second belt wheel 27 is connected with a first belt wheel 23 on a fixed shaft of the cleaning disc 24 through a transmission belt 28, the first gear 29 is driven to rotate by rotating the outer ring 36, the first gear 29 drives the second belt wheel 27 to rotate, the second belt wheel 27 rotates through the first belt wheel 23 of the transmission belt 28, and the first belt wheel 23 drives the cleaning disc 24 to rotate, so that the cleaning brush 26 is driven to clean the filtering surface of the filtering block 33;
the first belt wheel 23 is an eccentric belt wheel, the lower end of a fixed shaft of the first belt wheel 23 is rotatably connected with the upper end of a sliding seat 22, the sliding seat 22 is slidably arranged at the inner bottom of the cleaning shell 54, a guide rod 18 is arranged at the right end of the sliding seat 22, the guide rod 18 slidably penetrates through a positioning sleeve 19 arranged at the inner bottom of the cleaning shell 54, the sliding seat 22 and the positioning sleeve 19 are fixedly connected through a first spring 21, and the first belt wheel 23 is an eccentric wheel, so that the first belt wheel can be matched with the reset of the first spring 21 when rotating, and the sliding seat 22 can slide left and right along the guide rod 18 in a reciprocating manner, so that the cleaning disc 24 can also move in a reciprocating manner when rotating rapidly, and the cleaning effect is improved;
a polarizing hole with a rectangular cross section is formed in the middle of the lower end of the cleaning disc 24 and is in sliding fit with the top of a fixed shaft at the lower end of the cleaning disc 24, a polarizing spring is arranged in the polarizing hole, a plurality of convex blocks 25 are distributed at the lower end of the cleaning disc 24 in an array manner, at least one pressing wheel 17 which is arranged below the cleaning disc 24 and is used for intermittently pressing the convex blocks 25 is arranged in the cleaning shell 54, and therefore when the cleaning disc 24 rotates rapidly, the pressing wheel 17 can be matched with the convex blocks 25, so that the cleaning brush 26 can clean the hole in an up-and-down vibrating manner, and the cleaning effect is further improved;
a bearing ring is rotatably arranged on the outer side of the cleaning disc 24, the outer ring of the bearing ring is fixedly connected with the buffer cover 16 through an elastic adhesive tape, the buffer cover 16 covers the second opening, a slag discharge pipe 15 for discharging cleaned dust is arranged on the outer side of the buffer cover 16, the slag discharge pipe 15 penetrates through the cleaning shell 54, when the cleaning disc 24 swings, the buffer cover 16 cannot be influenced by the deviation of the elastic adhesive tape due to the arrangement of the elastic adhesive tape, the dust generated by cleaning can be collected in the buffer cover 16, and under the guidance of air flow, the dust can be discharged along the slag discharge pipe 15;
it should be noted that, during cleaning, due to the reverse flow of the air in the first air guide channel 44 and the second air guide channel 46, if the filter block 33 is blocked, the filter block 33 will slide out along the first air guide channel 44 or the second air guide channel 46 under the action of the air flow and then contact the cleaning brush 26, so that there is no need to worry about the long-term contact of the cleaning brush 26 with the filter block 33, and after cleaning holes are finished, the filter block 33 will be received in the rotary inner ring 34 or the second air guide channel 46 under the action of the second spring 30;
the auxiliary filter screen 55 needs to be replaced after long-term use, and can be replaced after a long time due to the fact that the auxiliary filter screen is only temporarily used;
the flow detection assembly comprises an installation seat 48 arranged on the detection shell 11, an instrument panel 47 used for displaying flow is installed at the upper end of the installation seat 48, a detection probe 12 used for extending into the detection shell 11 is arranged at the input end of the instrument panel 47, and a maintenance assembly used for conveniently maintaining the detection probe 12 is arranged on the detection shell 11;
the maintenance assembly comprises a first valve seat 14 arranged in a detection shell 11, the position of the first valve seat 14 corresponds to that of an installation seat 48, a first valve core 13 is matched in the first valve seat 14 in a rotating manner, a detection channel 49 corresponding to the position of a detection probe 12 is arranged on the first valve core 13, a rotary seal is formed between an installation shaft of the detection probe 12 and the first valve core 13, a cleaning pipeline 50 matched with the first valve core 13 is arranged on the outer side of the detection shell 11, a second air guide channel 46 is matched with the outer port of the cleaning pipeline 50, a first motor 51 used for driving the first valve seat 14 to rotate is connected to the lower end of the first valve seat 14, when the maintenance assembly is in normal use, the detection channel 49 is arranged in parallel to the axis of the detection shell 11, natural gas smoothly flows through the detection channel 49, the detection probe 12 can detect flow, and when the detection probe 12 needs to be maintained in a later period, at this time, the first motor 51 drives the first valve core 13 to rotate, so that the detection channel 49 and the inner cavity of the detection shell 11 are arranged in a staggered mode, the detection channel 49 is communicated with the cleaning pipeline 50, the detection probe 12 can be maintained, and the disassembly and the assembly are not needed.
The working principle of the invention is as follows:
in practical use, when the filter block 33 filters normally, the pressure test block will not be pressed, when the filter block 33 is blocked, the filter block 33 will further press the second spring 30, so as to generate a greater pressure on the side block, when the pressure reaches a set value, the controller will receive a trigger signal, at this time, the second motor 52 will drive the second valve core 20 to rotate, so as to realize the switching of the channel between the second air guide channel 46 and the first air guide channel 44, when natural gas flows in the detection housing 11, the rotary blade 31 will drive the rotary inner ring 34 to rotate rapidly, under the action of magnetic force, the rotary outer ring 36 will also rotate together, so as to obtain power, the rotary outer ring 36 will drive the rotary ring 39 to rotate, so as to obtain blowing power, the air flow generated by blowing will backwash the filter block 33 in the second air guide channel 46, and drive the first gear 29 to rotate through the rotary outer ring 36, the first gear 29 drives the second belt wheel 27 to rotate, the second belt wheel 27 rotates through the first belt wheel 23 of the transmission belt 28, the first belt wheel 23 drives the cleaning disc 24 to rotate, so as to drive the cleaning brush 26 to clean the filtering surface of the filtering block 33, during cleaning, due to the reverse flow of the air in the first air guide channel 44 and the second air guide channel 46, if the filtering block 33 is blocked, the filtering block 33 slides out along the second air guide channel 46 under the action of the air flow and then contacts with the cleaning brush 26, so that the worry that the cleaning brush 26 contacts with the filtering block 33 for a long time is not needed, after the hole cleaning is finished, the wind resistance of the filtering block 33 is small, the filtering block 33 is taken into the second air guide channel 46 under the action of the second spring 30, the traction force detected by the pressure test block is smaller than a set value, and the second motor 52 rotates reversely at the moment (the different direction forces of the pressure show values), with the second air duct 46 in the operating position again, the dust generated by cleaning will collect in the buffer hood 16 and will be discharged along the slag discharge pipe 15 under the guidance of the air flow.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.
Claims (9)
1. A natural gas flow detection device comprises a detection shell (11) communicated with a communication pipe (32), wherein the detection shell (11) is connected with the communication pipe (32) through welding or flanges, a flow detection assembly for detecting the flow of natural gas is arranged on the detection shell (11), and a filtering assembly for eliminating impurities in the natural gas is further arranged on the detection shell (11) at the upstream of the flow detection assembly;
the device is characterized in that the filtering component comprises a cleaning shell (54) arranged on the outer side of the detection shell (11), a second valve seat (45) is arranged in the detection shell (11) where the cleaning shell (54) is located, a second valve core (20) matched with the second valve seat is arranged in the second valve seat (45), two first air guide channels (44) and two second air guide channels (46) which are vertically arranged are arranged in the second valve core (20), the first air guide channels (44) and the second air guide channels (46) are arranged in a staggered mode, a filtering piece is arranged in each second air guide channel (46), an auxiliary filtering net (55) is arranged in each first air guide channel (44), the auxiliary filtering net (55) is detachably arranged in each first air guide channel (44), a first opening (42) and a second opening are respectively arranged on the upper side and the lower side of the detection shell (11) where the cleaning shell (54) is located, the second valve core (20) is connected to the side face of the second valve core (20) and used for driving the second motor (52) to rotate, and the second valve core (20) is driven to rotate through the second motor (52), so that the first air guide channel (44) and the second air guide channel (46) are communicated with the inner cavity of the detection shell (11) in turn, and therefore when the filter piece is cleaned, the auxiliary filter screen (55) can replace work, the problem of shutdown is avoided, and the problem of blockage is avoided.
2. The natural gas flow rate detecting device according to claim 1, wherein the filter element includes a piston ring slidably disposed in the second gas guiding channel (46), a filter block (33) for filtering natural gas is mounted on the piston ring, the inner side of the filter block (33) is connected and fixed to a side block of the inner wall of the second gas guiding channel (46) through a second spring (30), a pressure test block electrically connected to the controller (53) is disposed on the side block, the output end of the controller (53) is electrically connected to the control end of the second motor (52), when the filter block (33) filters normally, the pressure test block is not pressed, when the filter block (33) is blocked, the filter block (33) further presses the second spring (30) to generate a greater pressure on the side block, and when the pressure reaches a set value, the second motor (52) drives the second valve core (20) to rotate, thereby achieving switching of the passage between the second air guide passage (46) and the first air guide passage (44).
3. The natural gas flow rate detecting device according to claim 2, wherein a cleaning hole member for filtering the filter block (33) by using natural gas energy as power is further provided inside the cleaning housing (54), the hole cleaning piece comprises a rotating ring (39) which is rotatably arranged at the upper end of the first opening (42), the inside of the rotating ring (39) is provided with fan blades (40) for generating air blowing, the outer side of the cleaning shell (54) where the rotating ring (39) is arranged is provided with an air inlet port (43), an air inlet filter screen (41) for filtering air is arranged on the air inlet port (43), the second opening is provided with a scraping mechanism for scraping the filtering surface of the filtering block (33), the scraping mechanism comprises a cleaning disc (24), a cleaning brush (26) for scraping materials is arranged on the upper end surface of the cleaning disc (24), the rotating ring (39) and the cleaning disc (24) are connected with a driving piece which is used for driving the rotating ring to rotate so as to generate hole cleaning power.
4. The natural gas flow detecting device according to claim 3, wherein the driving member includes a rotating outer ring (36) rotatably sleeved on an outer side of the detecting housing (11) and a rotating inner ring (34) rotatably disposed on an inner side of the detecting housing (11), the rotating inner ring (34) and the rotating outer ring (36) are rotatably connected through a fixed bearing (35), a plurality of second magnet blocks are distributed in an array manner inside the rotating inner ring (34), a plurality of first magnet blocks (37) are distributed in an array manner inside the rotating outer ring (36), the first magnet blocks (37) and the second magnet blocks are mutually attracted, a rotating blade (31) for acquiring kinetic energy of the fluid is disposed inside the rotating inner ring (34), and when natural gas flows inside the detecting housing (11), the rotating blade (31) drives the rotating inner ring (34) to rotate rapidly, under the action of magnetic force, the rotating outer ring (36) can also rotate along with the rotating outer ring to obtain power, a fixed shaft is rotated at the upper end of the detection shell (11), a second gear (38) is arranged on the fixed shaft, the second gear (38) is meshed with a gear ring surface on the outer side of the rotating outer ring (36), the right side of the second gear (38) is meshed with a gear ring surface on the outer side of the rotating ring (39), the rotating ring (39) can be driven to rotate through the rotating outer ring (36), so that blowing power is obtained, and air flow generated by blowing can carry out backwashing treatment on the filter block (33) in the first air guide channel (44) or the second air guide channel (46);
the driving piece further comprises a first gear (29) meshed with the gear ring face on the outer side of the first gear (29), a fixed shaft of the first gear (29) is rotatably connected with the detection shell (11), a second belt wheel (27) is arranged on the fixed shaft of the first gear (29), and the second belt wheel (27) is connected with a first belt wheel (23) on the fixed shaft of the cleaning disc (24) through a transmission belt (28).
5. The natural gas flow rate detecting device according to claim 4, wherein the first pulley (23) is an eccentric pulley, the lower end of the fixed shaft of the first pulley (23) is rotatably connected with the upper end of a sliding seat (22), the sliding seat (22) is slidably disposed at the inner bottom of the cleaning housing (54), the right end of the sliding seat (22) is provided with a guide rod (18), the guide rod (18) slidably passes through a positioning sleeve (19) disposed at the inner bottom of the cleaning housing (54), the sliding seat (22) and the positioning sleeve (19) are fixedly connected through a first spring (21), the first pulley (23) is an eccentric wheel, and the sliding seat (22) is reciprocally slid along the guide rod (18) in cooperation with the reset of the first spring (21) when rotating, so that the cleaning disc (24) can also be reciprocally moved when rotating rapidly, the cleaning effect is improved;
the cleaning device is characterized in that a polarizing hole with a rectangular cross section is formed in the middle of the lower end of the cleaning disc (24), the polarizing hole is in sliding fit with the top of a fixing shaft at the lower end of the cleaning disc (24), a polarizing spring is arranged in the polarizing hole, a plurality of protruding blocks (25) are distributed at the lower end of the cleaning disc (24) in an array mode, at least one pressing wheel (17) which is arranged below the cleaning disc (24) and used for intermittently pressing the protruding blocks (25) is arranged inside the cleaning shell (54), and the pressing wheel (17) can be matched with the protruding blocks (25) when the cleaning disc (24) rotates fast, so that the cleaning brush (26) can shake up and down to clean the hole.
6. The natural gas flow rate detecting device according to claim 5, characterized in that a bearing ring is rotatably arranged on the outer side of the cleaning disc (24), the outer ring of the bearing ring is fixedly connected with the buffer cover (16) through an elastic adhesive tape, the buffer cover (16) covers the second opening, a slag discharging pipe (15) for discharging cleaned dust is arranged on the outer side of the buffer cover (16), the slag discharging pipe (15) penetrates through the cleaning shell (54), when the cleaning disc (24) swings, the elastic adhesive tape is arranged so that the elastic adhesive tape can not affect the buffer cover (16), the dust generated by cleaning can be collected in the buffer cover (16), and the dust can be discharged along the slag discharging pipe (15) under the guidance of air flow.
7. The natural gas flow detection device according to claim 1, wherein the flow detection assembly comprises a mounting seat (48) arranged on the detection shell (11), an instrument panel (47) used for displaying flow is mounted at the upper end of the mounting seat (48), a detection probe (12) used for extending into the detection shell (11) is arranged at the input end of the instrument panel (47), and a maintenance assembly used for facilitating maintenance of the detection probe (12) is arranged on the detection shell (11).
8. The natural gas flow rate detection device according to claim 7, wherein the maintenance assembly comprises a first valve seat (14) provided inside the detection housing (11), the first valve seat (14) corresponds to the position of the mounting seat (48), a first valve core (13) is rotatably matched in the first valve seat (14), the first valve core (13) is provided with a detection channel (49) corresponding to the position of the detection probe (12), a rotary seal is arranged between the mounting shaft of the detection probe (12) and the first valve core (13), a cleaning pipeline (50) matched with the first valve core (13) is arranged on the outer side of the detection shell (11), a second air guide channel (46) is arranged at the outer port of the cleaning pipeline (50) in a matching way, the lower end of the first valve seat (14) is connected with a first motor (51) for driving the first valve seat to rotate.
9. The natural gas flow detecting device detecting method as claimed in any one of claims 1 to 8, wherein when the filter block (33) filters normally, the pressure testing block is not pressed, when the filter block (33) is blocked, the filter block (33) further presses the second spring (30) to generate a larger pressure on the side block, when the pressure reaches a set value, the controller receives a trigger signal, and the second motor (52) drives the second valve core (20) to rotate, so as to switch the passage between the second air guide passage (46) and the first air guide passage (44), when natural gas flows in the detecting housing (11), the rotating blade (31) drives the rotating inner ring (34) to rotate rapidly, and under the action of magnetic force, the rotating outer ring (36) rotates together to obtain power, and the rotating ring (39) is driven to rotate by the rotating outer ring (36), thereby obtaining blowing power, the air flow generated by blowing can carry out backwashing treatment on the filter block (33) in the second air guide channel (46), the first gear (29) is driven to rotate by the rotating outer ring (36), the first gear (29) drives the second belt wheel (27) to rotate, the second belt wheel (27) drives the first belt wheel (23) to rotate by the transmission belt (28), the first belt wheel (23) drives the cleaning disc (24) to rotate, so as to drive the cleaning brush (26) to clean the filter surface of the filter block (33), when cleaning, because the air in the second air guide channel (46) reversely flows, if the filter block (33) is blocked, the filter block (33) can slide out along the second channel (46) under the action of the air flow, and further contacts with the cleaning air guide brush (26), so that the cleaning brush (26) does not need to worry about the long-term contact with the filter block (33), after hole cleaning is finished, the filter block (33) is collected into the second air guide channel (46) under the action of the second spring (30), the traction force detected by the pressure test block is smaller than a set value, the second motor (52) rotates reversely at the moment, so that the second air guide channel (46) is located at the working position again, dust generated by cleaning is collected in the buffer cover (16), and the dust is discharged along the slag discharge pipe (15) under the guide of air flow.
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| CN202111033974.6A CN113670402A (en) | 2021-09-03 | 2021-09-03 | Natural gas flow detection device and method |
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| CN202111033974.6A CN113670402A (en) | 2021-09-03 | 2021-09-03 | Natural gas flow detection device and method |
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