CN116637447B - Filtering control system with protection device - Google Patents
Filtering control system with protection device Download PDFInfo
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- CN116637447B CN116637447B CN202310443608.0A CN202310443608A CN116637447B CN 116637447 B CN116637447 B CN 116637447B CN 202310443608 A CN202310443608 A CN 202310443608A CN 116637447 B CN116637447 B CN 116637447B
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- 238000001914 filtration Methods 0.000 title claims abstract description 67
- 230000004308 accommodation Effects 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 54
- 239000002912 waste gas Substances 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000009423 ventilation Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a filtration control system with a protection device, which belongs to the technical field of tail gas filtration of thermal power plants, wherein the protection device is arranged at the air inlet end of an exhaust gas discharge pipe of the filtration control system and is used for filtering exhaust gas, and the protection device comprises: the device body for with exhaust emission pipe intercommunication, its structure is formed with the accommodation chamber for the top, be formed with the air current runner of nonlinear flow in the accommodation chamber, just be equipped with the main filter in the accommodation chamber, still include: the alarm filter is communicated with an air inlet branch arranged at the air inlet end of the exhaust gas discharge pipe, and when the airflow channel is blocked, the alarm filter is started to alarm and filter exhaust gas.
Description
Technical Field
The invention relates to the technical field of tail gas filtration of thermal power plants, in particular to a filtration control system with a protection device.
Background
In the whole process of power generation of the thermal power plant, emissions are not up to standard and can cause environmental quality degradation, for example, the flue gas emission of the thermal power plant contains harmful chemical substances, a large amount of granular dust exists, additional treatment is carried out after the flue gas is required to be conveyed through a pipeline in the flue gas treatment process, and when the flue gas flows through the pipeline, the flue gas is easy to block after dirt accumulation, so that the pipeline gas conveying and the subsequent emission are affected.
In the prior art, corresponding waste gas purifying equipment is also available, such as a waste gas purifying equipment of Chinese patent CN111760386B, the purifying equipment comprises a mounting pipe body, one end of the mounting pipe body is fixedly connected with an air inlet pipe, the air inlet pipe is connected with the middle section of the mounting pipe body and is communicated with the middle section of the mounting pipe body, a filtering mechanism is arranged in the mounting pipe body, one end of the mounting pipe body, which is away from the air inlet pipe, is fixedly connected with a plurality of support columns, one end of the plurality of support columns, which is away from the mounting pipe body, is fixedly connected with the same guide pipe, one end of the mounting pipe body, which is away from the air inlet pipe, is fixedly connected with a ventilation mechanism, one end of the ventilation mechanism, which is away from the mounting pipe body, is inserted into the guide pipe and is in sealing connection with the mounting pipe body, and the ventilation mechanism is communicated with the mounting pipe body;
although this clarification plant can carry out the preliminary smoke and dust treatment to the waste gas of thermal power plant etc. place production, reduces its transportation in the pipeline and leads to the phenomenon of layer wall scale deposit, but when filter mechanism breaks down, traditional mode of removing the trouble is the periodic shutdown and maintains filter mechanism, and the tail gas filtration system of thermal power plant needs careful maintenance because work load is big, should accomplish to avoid shutting down and maintaining in the use.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a filtering control system with a protection device, which can give an alarm in time and start a standby channel to maintain the normal operation of the system when the filtering fails, thereby providing a maintenance time difference for the system maintenance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention discloses a filter control system with a protection device, wherein the protection device is arranged at the air inlet end of an exhaust gas discharge pipe of the filter control system and is used for filtering exhaust gas, and the protection device comprises:
the device body for with exhaust emission pipe intercommunication, its structure is formed with the accommodation chamber for the top, be formed with the air current runner of nonlinear flow in the accommodation chamber, just be equipped with the main filter in the accommodation chamber, still include:
and the alarm filtering piece is communicated with an air inlet branch arranged at the air inlet end of the exhaust gas discharge pipe, and when the airflow channel is blocked, the alarm filtering piece starts alarm and filters exhaust gas.
Further, the alarm filter is internally provided with a poking plate with a flexible structure, so that the exhaust gas discharge pipe is under negative pressure, the poking plate is elastically deformed, an air flow channel for air supply flow is formed between the poking plate and the inner wall of the alarm filter, and the air inlet branch is changed from a closed state to an open state.
Further, an air inlet hole is formed in one end of the alarm filtering piece, a first through hole is formed in the alarm filtering piece, the position of the first through hole corresponds to the position of the air inlet hole, the poking piece is arranged between the first through hole and the air inlet hole, a plurality of second through holes are formed in the outer circumference of the first through hole, and whistle mouths for alarming are arranged in the second through holes.
Further, an auxiliary filtering channel is formed at the end, far away from the poking piece, of the alarm filtering piece, a standby filtering body is arranged in the auxiliary filtering channel, and waste gas flows through the standby filtering body and then enters the waste gas discharge pipe.
Further, the accommodating cavity is internally provided with a spiral airflow channel, the airflow channel is provided with an inlet and an outlet, the bottom of the device body is provided with a connector which is detachably connected with the waste gas discharge pipe, the connector is communicated with the outlet, and the airflow channel is sleeved with a flexible sleeve matched with the structure of the airflow channel.
Further, a sealing gasket, an extrusion piece and a main filter body are sequentially arranged in the accommodating cavity and positioned at the top of the flexible sleeve; and
an end cap for covering the accommodation chamber, the end cap having an air intake passage communicating with the exhaust gas discharge pipe.
Further, two positioning columns are distributed on the inner wall of the accommodating cavity at intervals, the positioning columns extend along the axial direction of the device body, and notches are formed in the flexible sleeve and the sealing gasket and are used for being clamped with the two positioning columns.
Further, the pressing piece is provided with a pressing piece for supporting the main filter body and a gasket for pressing the sealing gasket, the pressing piece is provided with a plurality of ventilation holes, and an airflow layer is formed between the gasket and the pressing piece.
Further, ribs are radially arranged on the top wall of the inner part of the end cover, and the main filter body is extruded through the ribs.
Further, the end cover has a flange extending toward the device body, and the flange is detachably and fixedly connected with the outer wall of the device body through a connecting portion.
In the technical scheme, the filtering control system with the protection device has the beneficial effects that:
the invention provides a filtering control system with a protection device, which comprises a device body and an alarm filter piece, wherein when an airflow channel of the device body is blocked and fails, the alarm filter piece is started, waste gas is purified through an air inlet branch for a waste gas discharge pipe, and after the alarm filter piece is started, a poking piece in the alarm filter piece is deformed, so that the air inlet branch is turned from a closed state to an open state, and the duration time is provided for the filtering control system;
secondly, an airflow channel for the flow of purified waste gas is arranged in the accommodating cavity of the device body, and the airflow channel is constructed as a nonlinear airflow channel, so that the purified air can be stably and quietly fed, and the noise reduction effect is good;
in addition, the air inlet end of the exhaust gas discharge pipe of the filtering control system is provided with a protection device for filtering exhaust gas, so that the filtering control system is convenient to detach and replace, and is beneficial to improving the maintenance efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic view of a partial structure of a filtration control system with a protection device according to the present disclosure;
FIG. 2 is a cross-sectional view of a filter control system protector having a protector in accordance with the present disclosure;
FIG. 3 is an exploded view of a protection device of a filtration control system with a protection device of the present disclosure;
FIG. 4 is a top view of a filter control system device body with a protection device in accordance with the present disclosure;
FIG. 5 is an isometric view of a filtration control system end cap with a protective device of the present disclosure;
FIG. 6 is a cross-sectional view of an alarm filter of the filtration control system with a protection device of the present disclosure;
FIG. 7 is a cross-sectional view of another embodiment of a filtration control system alarm filter with a protection device of the present disclosure;
FIG. 8 is a cross-sectional view of another embodiment of a filtration control system alarm filter with a protection device of the present disclosure;
FIG. 9 is a cross-sectional view of another embodiment of a filtration control system alarm filter with a protection device of the present disclosure;
FIG. 10 is a cross-sectional view of another embodiment of a filtration control system alarm filter with a protection device of the present disclosure.
Reference numerals illustrate:
an exhaust gas discharge pipe 10; an intake branch 11; a valve 12;
a protection device 20; a device body 21; a receiving chamber 211; an airflow channel 212; an inlet 213; an outlet 214; a joint 215; positioning posts 216; a flexible sleeve 22; extension wings 221; a gasket 23; a spacer 24; tabletting 25; a vent hole 251; a main filter 26; an end cap 27; an intake passage 271; rib 272; a connection portion 273;
an alarm filter 30; a paddle 31; an air flow passage 311; an air intake hole 32; a first through hole 33; a second through hole 34; a whistle mouth 35; a spare filter 36; a sleeve 37; a rigid collar 38; sliding sleeve 39.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See fig. 1-7;
the invention relates to a filtration control system with a protection device 30, wherein the protection device 20 is arranged at the air inlet end of an exhaust gas discharge pipe 10 of the filtration control system and is used for filtering exhaust gas, and the protection device 20 comprises:
the device body 21 for communicating with the exhaust gas discharge pipe 10 is constructed such that a receiving chamber 211 is formed at the top, a non-linear flow air flow passage 212 is formed in the receiving chamber 211, a main filter 26 is installed in the receiving chamber 211, and further comprises
And an alarm filter 30 which communicates with the intake branch 11 disposed at the intake end of the exhaust gas discharge pipe 10, and when the airflow passage 212 is blocked, the alarm filter 30 opens an alarm and filters the exhaust gas.
Specifically, referring to fig. 1, the protection device 30 has a device body 21 and an alarm filter 30, and the exhaust gas discharge pipe 10 is provided with an intake branch 11;
the device body 21 is arranged at the air inlet end of the exhaust gas discharge pipe 10, a containing cavity 211 for containing the main filter body 26 is formed in the device body 21, the exhaust gas flows through the air flow channel 212 of the containing cavity 211 after being purified by the main filter body 26 and enters the exhaust gas discharge pipe 10, and the air flow channel 212 is constructed as a non-linear flowing air flow channel, so that turbulence of air is avoided, and noise is reduced;
the alarm filter 30 is installed at the air inlet end of the air inlet branch 11, and in order to facilitate the removal of the device body 21, a valve 12 is installed on the pipe body between the tail end of the exhaust gas discharge pipe 10 and the air outlet end of the air inlet branch 11, and the air inlet end of the exhaust gas discharge pipe 10 can be selectively closed through the valve 12;
when the system is in operation, when the airflow channel 212 of the device body 21 is blocked, the internal pressure of the exhaust gas discharge pipe 10 is increased, the air inlet branch 11 is used as a standby air inlet channel, the poking plate 31 in the alarm filter 30 is deformed under negative pressure, the air inlet end of the air inlet branch 11 is opened, waste gas flows through the alarm filter 30 to enter the air inlet branch 11, and the waste gas is alarmed and filtered through the alarm filter 30, so that the endurance time is provided for the whole filtration control system, the system is enabled to operate normally, and the maintenance time difference is provided for system maintenance;
see fig. 1, 6;
preferably, the alarm filter 30 is internally provided with the poking plate 31 with a flexible structure, so that the exhaust gas discharge pipe 10 is negatively pressurized, the poking plate 31 is elastically deformed, and an air flow channel 311 for air flow is formed with the inner wall of the alarm filter 30, and the air inlet branch 11 is turned from a closed state to an open state.
Specifically, when the airflow channel 212 is blocked, the pressure at the air inlet end of the exhaust gas discharge pipe 10 is greater than a set threshold value, the poking plate 31 elastically deforms under the pressure difference at two sides of the exhaust gas discharge pipe 10, as shown in fig. 7, the poking plate 31 is recessed towards the inside of the air inlet branch 11, the poking plate 31 is a rubber sheet capable of elastically deforming in the prior art, and a gap is formed between the outer wall of the poking plate 31 and the inner wall of the alarm filter 30 to form an airflow channel 311 for air supply and airflow circulation, so that the air inlet branch 11 is turned from a closed state to an open state, exhaust gas is purified, and thus when the airflow channel 212 has excessive dust accumulation and airflow resistance, the airflow channel 311 can be passively opened to provide endurance time for a filtration control system;
see fig. 6, 7;
preferably, an air inlet hole 32 is formed in one end of the alarm filter element 30, a first through hole 33 is formed in the alarm filter element 30 corresponding to the air inlet hole 32, a pulling piece 31 is arranged between the first through hole 33 and the air inlet hole 32, a plurality of second through holes 34 are formed in the outer circumference of the first through hole 33, and whistle nozzles 35 for alarming are arranged in the second through holes 34.
Specifically, one end of the alarm filter 30 is connected with the air inlet branch 11, the other end of the alarm filter 30 is sequentially provided with an air inlet hole 32 and a first through hole 33, and a plurality of second through holes 34 are formed in the periphery of the outer side of the first through hole 33, wherein the first through hole 33 and the air inlet hole 32 are coaxially arranged, the diameter of the first through hole 33 is smaller than that of the air inlet hole 32, the plectrum 31 is prevented from being completely sucked into the second through hole 34, meanwhile, air flow entering through the second through hole 34 is sucked at the rear side of the first through hole 33 to form negative pressure, a drawing effect is formed on the plectrum 31, an interlayer is formed between the first through hole 33 and the air inlet hole 32 and used for installing the plectrum 31, and the whistle nozzle 35 is installed in the second through hole 34;
as shown in fig. 6, when the alarm filter 30 is in the closed state, the outer wall of the pulling piece 31 contacts with the inner wall of the alarm filter 30 to seal the first through hole 33 and the second through hole 34;
as shown in fig. 7, when the alarm filter 30 is in an open state, the pulling piece 31 is deformed, the pulling piece 31 covers the first through hole 33, the first through hole 33 is closed, the outer wall of the pulling piece 31 is far away from the inner wall of the alarm filter 30, an air flow channel 311 for flowing air supply flow is formed, the air inlet hole 32 and the second through hole 34 are opened, waste gas flows through the air inlet hole 32 and the second through hole 34 into the alarm filter 30, enters the air inlet branch 11 and the waste gas discharge pipe 10 after being filtered and purified by the standby filter 36 and is supplied to a system, and meanwhile, the air flow is blown to the whistle nozzle 35 when flowing through the second through hole 34, and an alarm is given;
see fig. 6;
preferably, the end of the alarm filter 30 far from the pulling piece 31 is provided with a secondary filter channel, a standby filter 36 is arranged in the secondary filter channel, and the waste gas flows through the standby filter 36 and then enters the waste gas discharge pipe 10.
Specifically, the alarm filter 30 includes a cover and a connection base, the alarm filter 30 is connected with the air inlet branch 11 through the connection base, an auxiliary filter channel is formed in the connection base, a standby filter 36 is arranged in the auxiliary filter channel, and the cover and the connection base can be detached and connected, so that the standby filter 36 can be conveniently replaced.
See fig. 8;
in a preferred embodiment, the alarm filter 30 further includes a sleeve 37 capable of penetrating the spare filter element 36, the head end of the sleeve 37 is connected to the first through hole 33, and the tail end of the sleeve 37 extends to the side of the spare filter element 36 away from the first through hole 33, so that the pressure at the head end of the sleeve 37 is lower, the suction of the pulling piece 31 by negative pressure is facilitated, and the pulling piece 31 is stabilized in an open state;
see fig. 9;
further, the edge of the pulling piece 31 is covered with a rigid collar 38, when the air inlet side and the air outlet side of the air inlet branch 11 are large enough (i.e. the exhaust gas discharge pipe 10 is blocked), the pulling piece 31 is directly sucked into the sleeve 37, the edge of the pulling piece 31 is clamped with the edge of the sleeve 37 through the rigid collar 38, and the position of the pulling piece 31 is positioned and stabilized, so that the maximum opening of the air flow channel 311 is realized, the air inlet flow of the air flow channel 311 is promoted, and the exhaust gas discharge pipe 10 is in a completely closed state correspondingly;
in summary, the above-mentioned pulling piece 31 has two states, the first air flow channel 311 is opened, the whistle nozzle 35 starts to alarm, but the exhaust gas discharge pipe 10 is still in the semi-working state, the second exhaust gas discharge pipe 10 is completely closed, only the air inlet branch 11 is in the working state, the air flow channel 311 is opened to the greatest extent, the alarm filter 30 is maintained and replaced after the exhaust gas discharge pipe 10 is maintained, or a valve can be installed at the exhaust section of the air inlet branch 11, when the alarm filter 30 is maintained, the valve can be closed, and the valve is opened after the maintenance is completed, so that the exhaust gas is prevented from being sucked into the air inlet branch 11 when the alarm filter 30 is maintained;
further, as the suction force is too large, a part of whistle mouth 35 is pulled away, namely the alarm sound is extremely large (more whistle mouths 35) at the beginning is generated, the noise is too large at the moment, the operation of operators is influenced, only a part of whistle mouths 35 are reserved for alarm when waiting for replacement, the noise is reduced, and the maintenance operation of the operators is facilitated;
specifically, referring to fig. 10, a sliding sleeve 39 is slidably connected in the sleeve 37, a plurality of connecting ribs are distributed around the sliding sleeve 39 in radial line, each connecting rib penetrates through the side wall of the sleeve 37, the tail ends of the connecting ribs are selectively and fixedly connected with part of the whistle nozzles 35, that is, the number of the connecting ribs is less than that of the whistle nozzles 35, for example, 6 whistle nozzles 35 are provided, the number of the connecting ribs is 4, when the suction force of the sleeve 37 is too large, the inner wall of the pulling piece 31 can be in contact with the sliding sleeve 39 to push the sliding sleeve 39 to displace, thereby driving the connecting ribs to pull out part of the whistle nozzles 35, so that noise during maintenance is reduced but an alarm is maintained, and in order to prevent waste gas from entering the air inlet branch 11 from the sleeve 37, a standby filter 36 is arranged in the sleeve 37, and waste gas is purified by the standby filter 36;
see fig. 3, 4;
preferably, a spiral airflow channel 212 is formed in the accommodating cavity 211, the airflow channel 212 is provided with an inlet 213 and an outlet 214, a connector 215 detachably connected with the exhaust gas discharge pipe 10 is formed at the bottom of the device body 21, the connector 215 is communicated with the outlet 214, and a flexible sleeve 22 matched with the structure of the airflow channel 212 is sleeved on the airflow channel 212.
Specifically, the device body 21 is a cylindrical structure, a containing cavity 211 is formed in the interior of the device body in a hollow manner, an airflow channel 212 is arranged in the containing cavity 211, the airflow channel 212 is in a spiral shape, as shown in fig. 4, the head end of the airflow channel 212 is an airflow inlet 213, the airflow inlet 213 is positioned at the side wall position in the device body 21, the tail end of the airflow channel 212 is an airflow outlet 214, the airflow outlet 214 is positioned at the center position of the bottom wall in the device body 21, a connector 215 is formed at the position, corresponding to the outlet 214, of the device body 21, and the connector 215 is detachably connected with the exhaust gas discharge pipe 10;
the flexible sleeve 22 is made of rubber material, and is sleeved outside the airflow channel 212, the structure of the flexible sleeve 22 is matched with the structure of the airflow channel 212, wherein an extending wing 221 is formed at the front end of the airflow channel 212, as shown in fig. 4, the extending wing 221 is attached to the inner side wall of the device body 21 to extend, the tail end of the extending wing 221 is not overlapped with the front end of the airflow channel 212, so that an airflow inlet 213 is formed, and when the airflow enters, the airflow enters from the inlet 213 of the side wall of the device body 21 in the arrow direction and then is discharged from an outlet 214 at the center of the device body 21;
see fig. 2, 3;
preferably, the sealing pad 23, the extrusion piece and the main filter body 26 are sequentially arranged in the accommodating cavity 211 and positioned at the top of the flexible sleeve 22; and
an end cap 27 for covering the accommodation chamber 211, the end cap 27 having an intake passage 271 communicating with the exhaust gas discharge pipe 10.
Specifically, the protection device 20 further includes a gasket 23, an extrusion, a main filter body 26, an end cap 27, and bolts;
the accommodating cavity 211 of the device body 21 is positioned at the top of the flexible sleeve 22 and is sequentially provided with a sealing gasket 23, an extrusion piece, a main filter body 26 and an end cover 27, a bolt sequentially penetrates through the device body 21, the flexible sleeve 22 and the sealing gasket 23 to be in threaded connection with the extrusion piece, the flexible sleeve 22 and the sealing gasket 23 are pressed by the extrusion piece, so that an air flow channel 212 forms a closed channel with two open ends, wherein the end cover 27 is provided with internal threads, and the internal threads are in threaded connection with the device body 21;
referring to fig. 5, therefore, an air inlet channel 271 is further formed at the position where the end cover 27 is screwed with the device body 21, and is communicated with the inside of the exhaust gas discharge pipe 10 through the air inlet channel 271, a main filter body 26 is disposed between the end cover 27 and the extrusion member, and in operation, exhaust gas flows through the air inlet channel 271 and the main filter body 26, then enters the air inlet 213, and is discharged from the air outlet 214;
see fig. 4;
preferably, two positioning columns 216 are arranged on the inner wall of the accommodating cavity 211 at intervals, the positioning columns 216 extend along the axial direction of the device body 21, and the flexible sleeve 22 and the sealing gasket 23 are both formed with notches for being clamped with the two positioning columns 216.
Specifically, in the structure, two positioning columns 216 are arranged on the inner wall of the accommodating cavity 211 at intervals to position the width of the inlet 213, meanwhile, the height direction of the positioning columns 216 extends along the axial direction of the device body 21, the sealing gasket 23 and the extrusion piece are limited to rotate and displace through the positioning columns 216, the flexible sleeve 22 and the sealing gasket 23 are both formed with notches, and the flexible sleeve is clamped with the two positioning columns 216 through the notches;
referring to fig. 3, the extrusion part is provided with a pressing sheet 25 for supporting the main filter body 26 and a gasket 24 for extruding the sealing gasket 23, the side part of the gasket 24 is clamped with two positioning columns 216 through a notch, the pressing sheet 25 is provided with a plurality of vent holes 251, as shown in fig. 2, an air flow layer is formed between the pressing sheet 25 and the gasket 24, and when in filtration, waste gas flows through an air inlet channel 271 of the end cover 27 and the main filter body 26, and then flows through the vent holes 251, the air flow layer, enters the air flow inlet 213 and is discharged from the air flow outlet 214;
as shown in fig. 5, preferably, ribs 272 are radially disposed on the inner top wall of the end cap 27, and the main filter body 26 is pressed by the ribs 272. And the inner surface of the support end cover 27 is far away from the main filter body 26, so that air circulation is facilitated;
preferably, the cover 27 has a flange extending toward the device body 21, the flange being detachably and fixedly connected to the outer wall of the device body 21 through the connection portion 273. Specifically, the connecting portion 273 is formed with an internal thread, and is connected with the device body 21 through the internal thread, so that the main filter 26 can be replaced in time, and the main filter 26 is arranged at the tail end of the pipeline of the filtration control system through the protecting device 30, so that the dismounting is convenient, the maintenance efficiency is improved, and faults are discharged in time.
In the above technical solution, the present invention provides a filtration control system with a protection device, and the principle is as follows:
when the filtration control system works, when the airflow channel 212 of the device body 21 is blocked, the internal pressure of the exhaust gas discharge pipe 10 is increased, the air inlet branch 11 is used as a standby air inlet channel, the plectrum 31 in the alarm filter 30 deforms under negative pressure, the plectrum 31 covers the first through hole 33, the first through hole 33 is closed, the air inlet 32 and the second through hole 34 are opened, the exhaust gas flows through the air inlet 32, the airflow channel 311 and the second through hole 34 to enter the alarm filter 30, and enters the air inlet branch 11 and the exhaust gas discharge pipe 10 after being filtered and purified by the standby filter 36 to be supplied into the system, so that the duration time is provided for the whole filtration control system, the system is normally operated, the maintenance time difference is provided for system maintenance, and meanwhile, the air flows to the whistle nozzle 35 when flowing through the second through hole 34, an alarm is sent out, and the maintenance is reminded;
when the device body 21 is discharged in a fault way, the internal pressure of the air discharge pipe 10 is normal, the poking plate 31 is reset, the air flow channel 311 is closed, the second through hole 34 is closed, and the device body 21 normally executes filtering work;
the beneficial effects are that:
the invention sets up the filtration control system with protective device, it has apparatus body 21 and warning filter 30, at first, when the air flow channel 212 of the apparatus body 21 blocks the trouble, the warning filter 30 is opened, purify the waste gas for the exhaust gas discharge pipe 10 through the air inlet branch 11, after the warning filter 30 is opened, the plectrum 31 in the warning filter 30 is deformed, make the air inlet branch 11 turn to the open state from the closed state, offer the duration for filtration control system;
secondly, the accommodating cavity 211 of the device body 21 is internally provided with an airflow channel 212 for the purified waste gas to circulate, and the airflow channel 212 is constructed as a nonlinear airflow channel, so that the purified air can be stably and quietly introduced, and the noise reduction effect is good;
in addition, the air inlet end of the exhaust gas discharge pipe 10 of the filtering control system is provided with a protection device 20 for filtering exhaust gas, so that the disassembly and replacement are convenient, and the maintenance efficiency is improved.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (5)
1. A filtration control system with a protection device (20), characterized in that the inlet end of an exhaust gas discharge pipe (10) of the filtration control system is provided with the protection device (20) for filtering exhaust gas, the protection device (20) comprising:
the device body (21) for communicating with the exhaust gas discharge pipe (10) is configured such that a holding cavity (211) is formed at the top, a non-linear flowing airflow channel (212) is formed in the holding cavity (211), and a main filter body (26) is arranged in the holding cavity (211), and the device further comprises:
an alarm filter (30) which is communicated with an air inlet branch (11) arranged at the air inlet end of the exhaust gas discharge pipe (10), and when the airflow channel (212) is blocked, the alarm filter (30) opens an alarm and filters the exhaust gas;
a poking plate (31) with a flexible structure is arranged in the alarm filtering piece (30), so that the exhaust gas discharge pipe (10) is under negative pressure, the poking plate (31) is elastically deformed, an air flow channel (311) for air supply flow circulation is formed between the poking plate and the inner wall of the alarm filtering piece (30), and the air inlet branch (11) is turned from a closed state to an open state;
an air inlet hole (32) is formed in one end of the alarm filtering piece (30), a first through hole (33) is formed in the alarm filtering piece (30) corresponding to the air inlet hole (32), a poking piece (31) is arranged between the first through hole (33) and the air inlet hole (32), a plurality of second through holes (34) are formed in the outer side of the first through hole (33) in the circumferential direction, and whistle nozzles (35) for alarming are formed in the second through holes (34); one end of the alarm filter piece (30) is connected with the air inlet branch (11), an air inlet hole (32) and a first through hole (33) are sequentially formed in the other end of the alarm filter piece, a plurality of second through holes (34) are formed in the periphery of the outer side of the first through hole (33), the first through hole (33) and the air inlet hole (32) are coaxially arranged, the diameter of the first through hole (33) is smaller than that of the air inlet hole (32), and when the alarm filter piece (30) is in a closed state, the outer wall of the poking piece (31) is in contact with the inner wall of the alarm filter piece (30) to seal the first through hole (33) and the second through hole (34); when the alarm filter (30) is in an open state, the poking plate (31) deforms, the poking plate (31) covers the first through hole (33), the first through hole (33) is closed, the outer wall of the poking plate (31) is far away from the inner wall of the alarm filter (30) to form an airflow channel (311) through which air flows, the air inlet (32) and the second through hole (34) are opened, waste gas flows through the air inlet (32) and the second through hole (34) to enter the alarm filter (30), and after being filtered and purified by the standby filter (36), the waste gas enters the air inlet branch (11) and the waste gas discharge pipe to be supplied into the system, and the airflow blows to the whistle mouth (35) when flowing through the second through hole (34),
an auxiliary filtering channel is formed at the end, far away from the poking piece (31), of the alarm filtering piece (30), a standby filtering body (36) is arranged in the auxiliary filtering channel, and exhaust gas flows through the standby filtering body (36) and then enters the exhaust gas discharge pipe (10);
the alarm filter element (30) further comprises a sleeve (37) which can penetrate through the standby filter body (36), the head end of the sleeve (37) is connected with the first through hole (33), the tail end of the sleeve (37) extends to the side of the standby filter body (36) far away from the first through hole (33), a sliding sleeve (39) is slidably connected in the sleeve (37), a plurality of connecting ribs are circumferentially distributed in radial lines on the sliding sleeve (39), each connecting rib penetrates through the side wall of the sleeve (37), the tail end of each connecting rib is selectively and fixedly connected with a part of whistle mouth (35), namely the number of the connecting ribs is smaller than the number of the whistle mouth (35), when the suction force of the sleeve (37) is too large, the inner wall of a shifting piece (31) can be contacted with the sliding sleeve (39), the sliding sleeve (39) is pushed to move, thereby driving the connecting ribs to pull away a part of the whistle mouth (35), a spiral airflow runner (212) is formed in the accommodating cavity (211), the airflow runner (212) is provided with an inlet (213) and an outlet (214), the bottom of the device body (21) is provided with an air flow runner (215) which is detachably connected with the exhaust pipe (10), the connector (215) and the flexible air runner (212) is provided with the flexible air runner (212), the structure of the flexible sleeve (22) is matched with the structure of the airflow channel (212), the front end of the airflow channel (212) is provided with an extension wing (221), the extension wing (221) is attached to the inner side wall of the device body (21) and extends, the tail end of the extension wing (221) is not overlapped with the front end of the airflow channel (212), so that an airflow inlet (213) is formed, and when the airflow enters, the airflow enters from the inlet (213) of the side wall of the device body (21) in the arrow direction and then is discharged from an outlet (214) at the central position of the device body (21);
a sealing gasket (23), an extrusion piece and a main filter body (26) are sequentially arranged at the top of the flexible sleeve (22) in the accommodating cavity (211); and an end cap (27) for covering the accommodation chamber (211), the end cap (27) having an intake passage (271) communicating with the exhaust gas discharge pipe (10).
2. A filtration control system with a protection device (20) according to claim 1, characterized in that;
two positioning columns (216) are distributed on the inner wall of the accommodating cavity (211) at intervals, the positioning columns (216) extend along the axial direction of the device body (21), and notches are formed in the flexible sleeve (22) and the sealing gasket (23) and are used for being clamped with the two positioning columns (216).
3. A filtration control system with a protection device (20) according to claim 1, characterized in that;
the extrusion piece is provided with a pressing piece (25) for supporting the main filter body (26) and a gasket (24) for extruding the sealing gasket (23), the pressing piece (25) is provided with a plurality of ventilation holes (251), and an airflow layer is formed between the gasket (24) and the pressing piece (25).
4. A filtration control system with a protection device (20) according to claim 1, characterized in that;
ribs (272) are radially arranged on the inner top wall of the end cover (27), and the main filter body (26) is extruded through the ribs (272).
5. A filtration control system with a protection device (20) according to claim 1 or 4, characterized in that;
the end cover (27) is provided with a flanging extending towards the device body (21), and the flanging is detachably and fixedly connected with the outer wall of the device body (21) through a connecting part.
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| CN202310443608.0A CN116637447B (en) | 2023-04-24 | 2023-04-24 | Filtering control system with protection device |
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| CN202310443608.0A CN116637447B (en) | 2023-04-24 | 2023-04-24 | Filtering control system with protection device |
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| CN116637447B true CN116637447B (en) | 2024-02-13 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN116637447A (en) | 2023-08-25 |
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