CN107569790B - Canister with filtering membrane - Google Patents
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- CN107569790B CN107569790B CN201710802567.4A CN201710802567A CN107569790B CN 107569790 B CN107569790 B CN 107569790B CN 201710802567 A CN201710802567 A CN 201710802567A CN 107569790 B CN107569790 B CN 107569790B
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Abstract
The invention relates to a fire-fighting article, in particular to a canister with a filtering membrane, which comprises a shell and two filtering plates positioned in the shell, wherein the shell is divided into a near-mouth-end air cavity, a filtering material storage cavity and a far-mouth-end air cavity by the two filtering plates, the near-mouth-end air cavity is provided with a near-mouth-end air hole, the far-mouth-end air cavity is provided with a far-mouth-end air hole, supporting pins are arranged in the near-mouth-end air cavity and the far-mouth-end air cavity, the near-mouth-end air hole is provided with a hole cover integrally formed with the shell, the joint of the cover plate and the shell is provided with a breakage guide groove, the breakage guide groove is positioned on the inner side of the cover plate. The invention provides a canister with a filtering membrane, wherein a hole cover is not easy to generate a disengagement phenomenon, a filtering plate is not easy to deform, and the filtering structure is low in fouling speed, and the canister solves the problems that the filtering membrane is easy to drop, the filtering plate is easy to deform due to the suspended arrangement and the fouling speed of the filtering material is high due to the fact that a rubber plug is used for sealing an air hole.
Description
Technical Field
The invention relates to a fire-fighting article, in particular to a canister with a filtering membrane.
Background
A fire fighting self-demand respirator is a tool which is worn during fire fighting operation to prevent smoke poisoning. The respirator filters the inhaled air through a green canister. A canister for a respirator is disclosed in chinese patent application No. 2012101089456, published as 2012, 8 and 1. The basic structure of the canister comprises a shell and two filter plates positioned in the shell, wherein the shell is divided into a near-mouth-end air cavity, a filter material storage cavity and a far-mouth-end air cavity by the two filter plates, the near-mouth-end air cavity is provided with a near-mouth-end air hole, the far-mouth-end air cavity is provided with a far-mouth-end air hole, and the filter material (such as activated carbon) is stored in the filter material storage cavity. Before not using, far away mouth end gas pocket for being in open, near mouth end gas pocket cover through the rubber lid, pull out when needing to use and wear after the rubber buffer, the air is filtered by filter material after far away mouth end gas pocket flows in, then flows out from near mouth end gas pocket. The prior poison filtering tank has the following defects: the rubber plug can be used for sealing in a pluggable mode, so that the phenomenon of wrong disengagement is easy to generate; the dirt speed of the filter material is high; the filter plate is in a suspended state, and the middle bulge is easy to deform; if the filter material is blocked and fails in the fire extinguishing field, suffocation is easy to occur, and even if the filter material is carried with a spare canister for replacement, smoke can still be inhaled during replacement, so that danger can be caused.
Disclosure of Invention
The invention provides a canister with a filtering membrane, wherein a hole cover is not easy to generate a disengagement phenomenon, a filtering plate is not easy to deform, and the filtering structure is low in fouling speed, and the canister solves the problems that the filtering membrane is easy to drop, the filtering plate is easy to deform due to the suspended arrangement and the fouling speed of the filtering material is high due to the fact that a rubber plug is used for sealing an air hole.
The technical problem is solved by the following technical scheme: the canister with the filtering membrane comprises a shell and two filtering plates positioned in the shell, wherein the two filtering plates divide the shell into a near mouth end air cavity, a filtering material storage cavity and a far mouth end air cavity, the near mouth end air cavity is provided with a near mouth end air hole, and the far mouth end air cavity is provided with a far mouth end air hole. The method for opening the hole cover is that the top block impacts an object to make the cover plate split along the broken guide groove and separated from the shell to realize the removal of the hole cover. The cover plate and the shell are connected together in an integrated manner, so that the falling phenomenon is not easy to generate. The top block protrudes out of the shell, so that the hole cover is convenient to drive to fall off by impact. The breakage guide groove is arranged on the inner side of the cover plate, namely in the inner space of the shell, and scraps generated when the cover plate is taken down are not easy to fall into the shell. Set up the support column and support the filter to make the filter be difficult to produce and warp. The air holes at the far mouth end are provided with the filtering membranes for filtering, so that the air entering the filtering material is cleaner, and the function of delaying the dirt of the filtering material is achieved.
Preferably, the far nozzle end air hole is a circular hole, the shell is provided with an annular sliding groove extending along the circumferential direction of the far nozzle end air hole, a sliding block is connected in the annular sliding groove in a sliding mode, and the sliding block is connected with a dust removal scraping blade horizontally arranged on the filtering membrane. When the dust accumulation on the filtering membrane is more, the sliding block slides in the sliding groove to drive the scraping blade to rotate when the filtering membrane is filtered, so that the dust on the filtering membrane is scraped, and the filtering membrane is cleaned. The filtering membrane is convenient to clean.
Preferably, the length of the dedusting blade is larger than or equal to the radius of the air hole at the far mouth end. The cleaned area is large.
Preferably, the top block is provided with a power assisting groove extending along the circumferential direction of the air hole at the near-mouth end. After the hole cover and the shell are cracked, the hole cover is pulled out by pinching the hole cover in the power-assisted groove by fingertips. The pulling-out of the hole cover is convenient.
Preferably, the booster groove is inclined away from the side wall of the cover plate towards the cover plate to form a barb. The force is more easily exerted.
Preferably, the near-mouth-end air cavity comprises a main air cavity, a first branch air cavity and a second branch air cavity, the near-mouth-end air cavity is arranged on the main air cavity, the first branch air cavity is provided with a first branch air hole communicated with the main air cavity, the second branch air cavity is provided with a second branch air hole communicated with the main air cavity, the far-mouth-end air cavity comprises a third branch air cavity, a fourth branch air cavity and a fifth branch air cavity, the far-mouth-end air hole is arranged on the fifth branch air cavity, the third branch air cavity is provided with a third branch air hole communicated with the fifth branch air cavity, the fourth branch air cavity is provided with a fourth branch air hole communicated with the fifth branch air cavity, all the branch air holes are covered with diaphragms, the diaphragms on the first branch air holes can only be opened towards the inside of the main air cavity, the diaphragms on the second branch air holes can only be opened towards the inside of the second branch air cavity, and the diaphragms on the third branch air holes can only be opened towards the inside, the membrane on the fourth air hole can only be opened towards the outside of the fourth air cavity, a drum is rotatably connected in the shell, the two filter plates form two bottom walls of the drum, the internal space of the drum forms the filter material storage cavity, a partition plate is arranged in the drum and divides the filter material storage cavity into a first storage cavity and a second storage cavity; the first branch storage cavity and the second branch storage cavity are communicated, one branch storage cavity is communicated with the first branch air cavity and the third branch air cavity, and the other branch storage cavity is communicated with the second branch air cavity and the fourth branch air cavity; the shell is equipped with dodges the groove, be equipped with on the global of cask the warp dodge the groove and stretch out the twist grip of shell. The filter material is characterized in that the filter material is arranged in a first branch air cavity and a second branch air cavity, the first branch air cavity is connected with the first branch air cavity, the second branch air cavity is connected with the second branch air cavity, the third branch air cavity is connected with the third branch air cavity, the filter material is arranged in a branch storage cavity, the first branch air cavity and the second branch air cavity are connected with the third branch air cavity, the filter material is arranged in the branch storage cavity, the first branch air cavity and the second branch air cavity, the second branch air cavity and the third branch air cavity are connected with. When the filtering material with the filtering function is blocked to influence the smoothness of breathing, the rotating barrel body switches the positions of the two branch storage cavities, and the switching result is that the filtering material with the filtering function is changed into a cleaned filtering material (namely, the filter material is cleaned on site by using the exhaled gas), and the cleaned filtering material is changed into the filtering material with the filtering function to clean the inhaled gas. This technical scheme can not leave (promptly do not take off) better filter material under the condition of respirator at the mouth, and the material under the change can utilize the gas of exhalation to clean to next time reuse and play increase of service life's effect.
Preferably, the central angle corresponding to the avoidance groove is 180 °, when the rotary handle abuts against one end of the avoidance groove, the first branch air cavity and the third branch air cavity are communicated only through the first branch storage cavity and the second branch air cavity and the fourth branch air cavity are communicated only through the second branch storage cavity, and when the rotary handle abuts against the other end of the avoidance groove, the first branch air cavity and the third branch air cavity are communicated only through the second branch storage cavity and the second branch air cavity and the fourth branch air cavity are communicated only through the first branch storage cavity. The two storage cavities can be conveniently and accurately replaced.
Preferably, the diaphragm is provided with a connecting pin at the center, the thickness of the diaphragm gradually decreases from the center to the peripheral edge, and the diaphragm seals the branch air holes by the contact of the peripheral edge and the end faces of the branch air holes. The reliability when opening the diaphragm is good.
Preferably, both side surfaces of the diaphragm are convex. The reliability of the diaphragm when it is opened and closed can be further improved.
Preferably, the area of the filtering membrane is larger than the opening area of the far-end air hole, a grid plate positioned on the inner side of the filtering membrane is arranged in the far-end air hole, and the periphery of the filtering membrane is connected with the grid plate. The filtering membrane can be folded together to improve the filtering effect during suction. The filter pulp can open during expiration for the air current flows out and leads to the groove and be convenient for the dust on the filtration membrane drops.
The invention has the following advantages: the air holes at the near and far mouth ends are not easy to open by mistake; the opening is convenient; the scraps generated during opening are not easy to fall into the interior of the canister; the filter plate is not easy to deform; the filtering membrane is arranged at the air hole at the far mouth end, so that the air passing through the filtering material can be pre-filtered, and the service life of the filtering material is prolonged.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of the invention.
Fig. 2 is a partially enlarged schematic view of a portion a of fig. 1.
Fig. 3 is a partially enlarged schematic view of fig. 1 at D.
Fig. 4 is a schematic diagram of a second embodiment of the invention.
Fig. 5 is a partially enlarged schematic view of a portion B of fig. 4.
Fig. 6 is a partially enlarged schematic view at C of fig. 4.
In the figure: the dust removing device comprises a shell 1, a box body 1-1, a box cover 1-2, a near mouth end air cavity 11, a near mouth end air hole 111, a main air cavity 112, a first branch air cavity 113, a second branch air cavity 114, a first branch air hole 115, a second branch air hole 116, a filter material storage cavity 12, a first branch storage cavity 121, a second branch storage cavity 122, a far mouth end air cavity 13, a far mouth end air hole 131, a grid plate 1311, a filter membrane 1312, an annular chute 1313, a sliding block 1314, a connecting handle 1315, a dust removing scraper 1316, a third branch air cavity 132, a fourth branch air cavity 133, a third branch air hole 134, a fourth branch air hole 135, a fifth branch air cavity 136, a supporting pin 14, an avoiding groove 15, one end 151 of the avoiding groove, the other end 152 of the avoiding groove, a near mouth end vertical partition plate 16, a first transverse partition plate 17, a second transverse partition plate 18, a far mouth end vertical partition plate 19, an orifice cover 2, a cover plate 21, a top block 22, a reinforcing plate 23, a, The outer side wall 31 of the damaged guide groove, the inner side wall 32 of the damaged guide groove, the boosting groove 4, the side wall 41 of the boosting groove far away from the cover plate, the barrel 5, the barrel body 5-1, the barrel cover 5-2, the filter plate 51, the rotating handle 52, the partition plate 55, the jack 53, the plug pin 54, the diaphragm 6, the connecting pin 61, the connecting frame 62 and the connecting line L of one end of the reinforcing plate far away from the top block and the cover plate.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1, a canister provided with a filter membrane comprises a housing 1 and two filter plates 51 located within the housing. The filter plate 51 is a mesh-structured plate.
The housing 1 is made of plastic. The housing 1 is cylindrical, and the center line of the housing extends in the left-right direction in the drawing. The shell 1 is formed by connecting a box body 1-1 and a box cover 1-2 together through tight balance. The two filter plates 51 divide the housing 1 into a proximal mouth end air chamber 11, a filter material reservoir chamber 12, and a distal mouth end air chamber 13.
The near-mouth-end air chamber 11 is provided with a near-mouth-end air hole 111. The proximal end air hole 111 is provided with a hole cover 2. The orifice cover 2 comprises a cover plate 21 and a top block 22. The cover plate 21 and the top block 2 are integrally structurally connected together. The cover plate 21 is plugged into the air hole 111 near the mouth end. The cover plate 21 and the housing 1, in particular the box cover 1-2, are integrally formed and connected together. The cover 2 is made of plastic. A breakage guide groove 3 is provided at the joint of the cover plate 21 and the housing 1. The breakage guide groove 3 is annular extending in the circumferential direction of the proximal air hole 111. The breakage guide groove 3 is located inside the cover plate 21. The top block 22 is located outside the cover plate 21. A top block 22 protruding from the housing 1. The cover plate 21 is also provided with a reinforcing plate 23. There are 7 reinforcing plates 23. The 7 reinforcing plates 23 are circumferentially distributed along the top block 22, i.e., the near-mouth-end air holes 111. The reinforcing plate 23 is triangular. One side of the reinforcing plate 23 is connected with the top block 22, and is particularly connected with the top block in an integrated forming mode, so that one side of the triangle where the reinforcing plate is located is a connecting line of the reinforcing plate and the top block. The other side of the reinforcing plate 23 is connected with the cover plate 21, specifically integrally formed, so that the other side of the triangle where the reinforcing plate is located is a connecting line of the reinforcing plate and the cover plate. The top block 22 is provided with a booster groove 4 extending in the circumferential direction of the top block. A plurality of support pins 14 are arranged in the proximal mouth end air cavity 11. Support pins 14 in the near-mouth-end air chamber 11 support the filter plates constituting the end where the near-mouth-end air chamber is located.
The distal-mouth-end air chamber 13 is provided with a distal-mouth-end air hole 131. A plurality of support pins 14 are also provided in the distal mouth end air chamber 13. A support pin 14 in the distal-mouth-end air chamber 13 supports the filter plate at the end where the distal-mouth-end air chamber is located.
The distal end air hole 131 is a circular hole. Within the distal air hole 131 is a grid plate 1311 and a filter membrane 1312. The filter membrane 1312 is only peripherally attached to the edges of the grid plate 1311. The filter membrane 1312 is located outside the grid plate 1311. The area of the filter film 1312 is larger than the opening area of the air holes 131 at the far mouth end, and as shown in the figure, the size relationship enables the filter film 1312 to be unfolded during expiration so as to facilitate dust falling; if air is sucked in, wrinkles can be generated to increase the filtering effect.
Referring to fig. 2, a connecting line L between one end of the reinforcing plate away from the top block and the cover plate is located inside a space surrounded by the outer sidewall 31 of the damage guide groove. The end of the reinforcing plate far from the top block and the connecting line L of the cover plate are positioned outside the space enclosed by the inner side wall 32 of the damage guiding groove. The booster groove slopes away from the cover plate side wall 41 towards the cover plate 21 to form a barb.
Referring to fig. 3, the cartridge body 1-1 is provided with a ring-shaped chute 1313. An annular chute 1313 extends circumferentially along distal tip air hole 131. A slider 1314 is slidably coupled within the annular chute 1313. A wiper 1316 is attached to the slider 1314 by a connecting shaft 1315. The wiper 1316 is pressed flat against the filter membrane 1312. The annular chute 1313 and the distal tip air hole 131 are coaxial. The length of the wiper 1316 is greater than the radius of the distal end air holes 131.
Referring to fig. 1, 2 and 3, in use, a filter material such as activated carbon is filled in the filter material storage chamber 12. The invention is mounted on a fire-fighting self-rescue respirator with the proximal end air hole 111 facing the interior of the respirator. When the respirator is used in a fire-fighting site, the near-mouth-end air hole 111 is opened, and then the fire-fighting self-rescue respirator is covered on the face of a user. The air containing smoke on site flows through the filter membrane 1312, the distal end air hole 131, the distal end air chamber 13, the filter material storage chamber 12, the proximal end air chamber 11 and the proximal end air hole 111 in this order, enters the respirator, and is inhaled by the user.
The method for opening the proximal air hole 111 comprises the following steps: the top block 22 is hit so that the cover plate 21 is split along the breakage guide groove 3 to separate and recess the hole cover 2 from the housing 1. And then the manhole cover 2 is pulled outwards by pinching fingers in the power assisting groove 4 to realize the removal of the manhole cover 2.
When dust is accumulated on the filter membrane 1312, the connecting handle 1315 is held to slide the sliding block 1314 in the annular sliding groove 1313, so that the dust removing blade 1316 is driven to rotate around the center of the air hole 131 at the far nozzle end to scrape the surface of the filter membrane 1312, and dust removal is realized.
The second embodiment is different from the first embodiment in that:
referring to fig. 4, the housing 1 is provided with an escape groove 15. The avoidance groove 15 extends in the circumferential direction of the housing 1. The central angle corresponding to the avoiding groove 15 is 180 °, that is, the extending length of the avoiding groove 15 is half of the perimeter of the housing.
A drum 5 is also rotatably connected within the housing 1. The two bottom walls of the drum 5 are formed by two filter plates 51, in other words, the two bottom walls of the drum 5 are provided with a plurality of filter holes to form two filter plates. The barrel 5 is formed by connecting a barrel body 5-1 and a barrel cover 5-2 together. The inner space of the drum 5 constitutes a filter material storage chamber 12. The drum 5 is provided with a partition 55 inside. The partition 55 divides the filter material storage chamber 12 into a first storage chamber 121 and a second storage chamber 122 uniformly. A rotating handle 52 is provided on the outer peripheral surface of the drum 5. The turning handle 52 extends out of the housing 1 through the escape slot 15. The position of the barrel 5 is prevented from moving by friction between the barrel 5 and the housing 1.
The near-mouth-end air chamber 11 is divided into a main air chamber 112, a first branch air chamber 113, and a second branch air chamber 114 by a near-mouth-end vertical partition plate 16 and a first transverse partition plate 17. The proximal-mouth-end air holes 111 are provided on the total air chamber 112. The first branch air chamber 113 communicates with the main air chamber 112 through the first branch air chamber 115. The second branch air chamber 114 communicates with the main air chamber 112 through a second branch air hole 116. The distal-mouth-end air chamber 13 is partitioned into a third sub-air chamber 132, a fourth sub-air chamber 133 and a fifth sub-air chamber 136 by the second cross partition plate 18 and the distal-mouth-end vertical partition plate 19. The distal-mouth-end air hole 131 is provided on the fifth branch air chamber 136. Is composed of a third branch air hole 134 and a fourth branch air hole 135. The third branch air chamber 132 communicates with the fifth branch air chamber 136 through the third branch air hole 134. The fourth branch air chamber 133 communicates with the fifth branch air chamber 136 through the fourth branch air hole 135.
The first branch air hole 115, the second branch air hole 116, the third branch air hole 134 and the fourth branch air hole 135 are all covered with the diaphragm 6. The structure and the fixed mode of the membrane 6 in each branch air hole are the same, and the directions in the branch air holes are different, so that the on-off directions of the branch air holes are controlled, specifically: the diaphragm at the first branch air hole 115 can be opened only toward the inside of the main air cavity 112, the diaphragm at the second branch air hole 116 can be opened only toward the inside of the second branch air cavity 114, the diaphragm at the third branch air hole 134 can be opened only toward the inside of the third branch air cavity 132, and the diaphragm at the fourth branch air hole 135 can be opened only toward the outside of the fourth branch air cavity 133.
When the turning handle 52 is turned until the turning handle 52 abuts against the one end 151 of the escape slot (i.e., the state in fig. 4), the first sub air chamber 113 and the third sub air chamber 132 communicate only through the first sub storage chamber 121 and the second sub air chamber 114 and the fourth sub air chamber 133 communicate only through the second sub storage chamber 122. When the turning handle 52 is turned until the turning handle 52 abuts against the other end 152 of the escape groove, the first branch air chamber 113 and the third branch air chamber 132 communicate only through the second branch storage chamber 122 and the second branch air chamber 114 and the fourth branch air chamber 133 communicate only through the first branch storage chamber 121.
The gas communication route and the switching process of the invention are as follows:
it is assumed that in the figure there is an initial state,
under the control action of the diaphragm, the flow path of the gas during air suction is as follows: the distal-end air hole 131 → the fifth branch air hole 136 → the third branch air hole 134 → the third branch air hole 132 → the first branch storage cavity 121 → the first branch air hole 113 → the first branch air hole 115 → the total air cavity 112 → the proximal-end air hole 111; the flow path of the gas during expiration is as follows: the proximal mouth end air hole 111 → the total air cavity 112 → the second branch air hole 116 → the second branch air cavity 114 → the second branch reservoir cavity 122 → the fourth branch air cavity 133 → the fourth branch air hole 135 → the fifth branch air cavity 136 → the distal mouth end air hole 131.
When the filtering material (activated carbon) in the first storage cavity 121 generates particles to block dirt and affect inhalation, the rotating handle 52 is held to rotate the barrel 5 to rotate the handle 52 and abut against the other end 152 of the avoiding groove, at the moment, the round tube 5 rotates 180 degrees, so that the positions of the first storage cavity 121 and the second storage cavity 122 are exchanged, at the moment, the filtering material in the first storage cavity 122 is filtered through the first filtering material when inhalation, the gas during exhalation flows out through the filtering material in the first storage cavity 121, and the exhaled gas realizes reverse blowing of the filtering material in the first storage cavity 121 to realize cleaning.
Referring to fig. 5, the barrel body 5-1 and the barrel cover 5-2 are connected in a manner that a plurality of insertion holes 53 distributed along the circumferential direction of the barrel body are formed in the end surface of the barrel body 5-1, a plurality of insertion pins 54 distributed along the circumferential direction of the sleeve are formed in the end surface of the barrel cover 5-2, and the barrel body and the barrel cover are connected together by inserting the insertion pins into the insertion holes in a one-to-one correspondence manner, so that the barrel body 5-1 and the barrel cover 5-2 can rotate together during rotation.
The membrane is further described below with respect to the structure of the membrane in the second branch air hole 116:
referring to fig. 6, the center of the diaphragm 6 is provided with a connecting pin 61, the connecting pin 61 is screwed on the connecting frame 62, and the connecting die 62 is connected with the second branch air hole 116 to realize the fixation of the diaphragm. The thickness of the diaphragm 6 becomes thinner from the center toward the periphery, and specifically, both side surfaces of the diaphragm are formed to be convex. The diaphragm 6 is sealed to the second branch air hole 116 by abutting the periphery on the end face of the second branch air hole 116 at the end located in the second branch air hole 114. When the airflow generates an acting force that the first branch air cavity 113 flows to the main air cavity 112 through the second branch air hole 116, the diaphragm 6 is driven to block the second branch air hole 116, so that the partition is realized; when the air flow generates a force from the main air chamber 112 to the first branch air chamber 113 through the second branch air hole 116, the diaphragm is driven to separate from the second branch air hole 116, so that the air flow can flow through.
Claims (7)
1. A canister with a filtering membrane comprises a shell and two filtering plates positioned in the shell, wherein the shell is divided into a near-mouth-end air cavity, a filtering material storage cavity and a far-mouth-end air cavity by the two filtering plates, the near-mouth-end air cavity is provided with a near-mouth-end air hole, and the far-mouth-end air cavity is provided with a far-mouth-end air hole The air cavity at the near mouth end is arranged on the main air cavity, the first branch air cavity is provided with a first branch air hole communicated with the main air cavity, the second branch air cavity is provided with a second branch air hole communicated with the main air cavity, the air cavity at the far mouth end comprises a third branch air cavity, a fourth branch air cavity and a fifth branch air cavity, the air cavity at the far mouth end is arranged on the fifth branch air cavity, the third branch air cavity is provided with a third branch air hole communicated with the fifth branch air cavity, the fourth branch air cavity is provided with a fourth branch air hole communicated with the fifth branch air cavity, all the branch air holes are covered with diaphragms, the diaphragm on the first branch air cavity can only be opened towards the inside of the main air cavity, the diaphragm on the second branch air cavity can only be opened towards the inside of the second branch air cavity, the diaphragm on the third branch air cavity can only be opened towards the inside of the third branch air cavity, and the diaphragm on the fourth branch air cavity can only be opened towards the outside of the fourth branch air cavity, a barrel is rotatably connected in the shell, the two filter plates form two bottom walls of the barrel, the internal space of the barrel forms the filter material storage cavity, a partition board is arranged in the barrel and divides the filter material storage cavity into a first storage cavity and a second storage cavity; the first branch storage cavity and the second branch storage cavity are communicated, one branch storage cavity is communicated with the first branch air cavity and the third branch air cavity, and the other branch storage cavity is communicated with the second branch air cavity and the fourth branch air cavity; the shell is equipped with and dodges the groove, be equipped with the warp on the global of cask dodge the groove and stretch out the turning handle of shell, far away mouth end gas pocket is the round hole, the shell is equipped with along the annular spout of far away mouth end gas pocket circumference extension, sliding connection has the slider in the annular spout, the slider is connected with the flat dust removal doctor-bar of putting filtration membrane.
2. The canister with the filter membrane according to claim 1, wherein the length of the dust removal blade is greater than or equal to the radius of the air hole at the distal end.
3. The canister with the filter membrane according to claim 1 or 2, wherein the top block is provided with a booster groove extending circumferentially along the proximal end air hole.
4. The filtered canister of claim 3, wherein the booster groove is angled away from the side wall of the cover plate towards the cover plate to form a barb.
5. The canister with the filter membrane according to claim 1, wherein the concentrical angle of the evasion groove is 180 °, and when the rotary handle is abutted against one end of the evasion groove, the first branch air chamber and the third branch air chamber are only communicated through the first branch storage chamber and the second branch air chamber and the fourth branch air chamber are only communicated through the second branch storage chamber, and when the rotary handle is abutted against the other end of the evasion groove, the first branch air chamber and the third branch air chamber are only communicated through the second branch storage chamber and the second branch air chamber and the fourth branch air chamber are only communicated through the first branch storage chamber.
6. The canister with the filter membrane according to claim 5, wherein the membrane sheet has a connecting pin at the center, the membrane sheet has a thickness gradually decreasing from the center to the peripheral edge, and the membrane sheet seals the branch air hole by abutting the peripheral edge against the end face of the branch air hole.
7. The canister with filter membrane according to claim 6, wherein both side surfaces of said membrane sheet are convex.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802567.4A CN107569790B (en) | 2017-09-07 | 2017-09-07 | Canister with filtering membrane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710802567.4A CN107569790B (en) | 2017-09-07 | 2017-09-07 | Canister with filtering membrane |
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| CN107569790A CN107569790A (en) | 2018-01-12 |
| CN107569790B true CN107569790B (en) | 2020-06-23 |
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| CN108607172B (en) * | 2018-06-28 | 2020-05-08 | 浙江带立新材料科技有限公司 | Canister structure with time-space conversion delay mechanism |
| EP3928839A3 (en) * | 2020-06-02 | 2022-03-16 | Dräger Safety AG & Co. KGaA | Filter unit with a rigid filter and a flexible cover and method for manufacturing such a filter |
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| CN207445381U (en) * | 2017-09-07 | 2018-06-05 | 江山市科力消防设备有限公司 | A kind of canister for setting filter membrane |
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Also Published As
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|---|---|
| CN107569790A (en) | 2018-01-12 |
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