CN107489794B - Fire-proof check valve for discharging fume - Google Patents
Fire-proof check valve for discharging fume Download PDFInfo
- Publication number
- CN107489794B CN107489794B CN201710879698.2A CN201710879698A CN107489794B CN 107489794 B CN107489794 B CN 107489794B CN 201710879698 A CN201710879698 A CN 201710879698A CN 107489794 B CN107489794 B CN 107489794B
- Authority
- CN
- China
- Prior art keywords
- pressure lever
- sensing element
- temperature sensing
- depression bar
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003517 fume Substances 0.000 title claims abstract description 6
- 238000007599 discharging Methods 0.000 title abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 6
- 230000002265 prevention Effects 0.000 claims abstract description 4
- 239000000779 smoke Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 21
- 238000007906 compression Methods 0.000 description 21
- 239000006233 lamp black Substances 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
- F16K15/033—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/386—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the closure members being rotatable or pivoting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2078—Removing cooking fumes movable
- F24C15/2092—Removing cooking fumes movable extendable or pivotable
Abstract
The utility model provides an oil extraction flue gas fire prevention check valve, the on-line screen storage device comprises a base, the valve body, dustcoat and valve block, dustcoat internally mounted has the depression bar, the depression bar includes first depression bar and second depression bar, first elastic component is installed to first end of first depression bar, the second elastic component is installed to the first end of second depression bar, still install the temperature sensing element fixing base in the dustcoat and reach the temperature sensing element that can fuse when setting for the temperature, under the state that the temperature sensing element does not fuse, first depression bar second end and second depression bar second end all limit on the temperature sensing element and separate with the valve block, under the state that the temperature sensing element fuses, first depression bar and second depression bar respectively rotate down and compress tightly jointly on the lateral surface of valve block under the effect of first elastic component and second elastic component. The pressure lever of the oil fume discharging fireproof check valve adopts the double pressure levers, so that the length of the pressure lever acting arm can be shortened, the moment is increased, the friction between the pressure lever and the edge of the valve plate is avoided when the pressure lever acts, the acting force applied to the valve plate by the double pressure levers is larger and more uniform, and the closing is firmer.
Description
Technical Field
The invention relates to a fireproof valve, in particular to an oil smoke discharging fireproof check valve.
Background
In a kitchen using a longitudinal public flue, in order to prevent the oil smoke in the flue from flowing back into the kitchen, a device such as a flue check valve is arranged between an outlet pipe orifice of the range hood and the public flue. The prior flue check valve generally comprises a lampblack channel formed by a shell, the lampblack channel is provided with an air inlet and an air outlet which are opposite, the air inlet is connected with an air outlet pipe orifice of the smoke exhaust ventilator, the air outlet extends into a public lampblack channel, a valve plate which can be opened and closed is arranged at the air outlet of the lampblack channel, and the valve plate is rotatably arranged on the inner wall of the lampblack channel through a valve plate rotating shaft which is horizontally arranged. When the range hood is not used, the valve plate is in a closed position due to self gravity, and the valve plate covers the air outlet part; when the range hood is used, the valve plate is in an open position and is far away from the air outlet. Because a plurality of households use one longitudinal public flue gas channel, once one household fires, a large amount of high-temperature harmful gas gushes into the longitudinal public flue gas channel, if the valve plate in the flue check valve is not closed in time at this moment, a large amount of high-temperature harmful gas can enter the household of the user who is using the lampblack absorber through the lampblack channel of the flue check valve, thereby threatens the life safety of the households.
As disclosed in application No. 201510675514.1 (application publication No. CN 105240582A), in the flue fire-proof valve for a range hood, the forced closing rod of the flue fire-proof valve is limited on the second bracket by the deformation sheet in the undeformed state of the deformation sheet, and the deformation sheet releases the limit of the forced closing rod after being deformed by heat, and the forced closing rod acts on the fire-proof valve sheet under the action of the elastic member, so that the fire-proof valve sheet is forced to be closed to isolate fire. Although the fire damper has a simple structure, the following disadvantages are caused by the adoption of a forced closing rod of the fire damper: 1. when the valve needs to be closed, the forced closing rod is possibly rubbed against the edge of the valve plate under the influence of the angle of the fireproof valve plate when the valve plate is opened, so that the fireproof valve cannot be closed; 2. because the single forced closing rod has longer acting force arm and larger proportion of the supporting arm, the force acting on the valve plate is smaller when the fireproof valve plate is closed, so that the valve plate is not closed tightly enough, and the blocking effect is not realized. In addition, in the existing fire-proof valve adopting a single pressure lever (the pressure lever is a forced closing lever in the patent document), the action of the pressure lever is controlled by heating deformation of a bimetallic strip (the action temperature is 150 degrees) to release the pressure lever, and because the characteristics of the bimetallic strip (the metal strips with different thermal deformation coefficients are compounded together) are that the bimetallic strip is deformed in one fixed direction, the pressure lever is limited on the side surface of the bimetallic strip, the prestress applied to the pressure lever is fully applied to the bimetallic strip, but the deformation direction of the bimetallic strip and the action direction of the pressure lever form an angle of 90 degrees, so that the pressure lever cannot be released when the temperature reaches a set value, and the fire-proof valve cannot be closed smoothly.
Disclosure of Invention
The invention aims to solve the technical problem of providing the oil smoke discharging fireproof check valve which can prevent the edge of a valve plate from being collided and can be closed more rapidly and firmly when a pressure lever acts.
The technical scheme adopted for solving the technical problems is as follows: this oil smoke exhaust fire prevention check valve, including base, valve body, dustcoat and valve block, the base is installed the outside of dustcoat, the valve body is installed inside the dustcoat, the valve block rotationally is connected on the valve body, have depression bar, its characterized in that at dustcoat internally mounted: the pressure lever comprises a first pressure lever and a second pressure lever, wherein a first elastic piece which enables the first pressure lever to have a downward rotation trend and closes the valve plate is arranged at the first end of the first pressure lever, a second elastic piece which enables the second pressure lever to have a downward rotation trend and closes the valve plate is arranged at the first end of the second pressure lever, a temperature sensing element fixing seat is further arranged in the outer cover, a temperature sensing element which can be fused when reaching a set temperature is arranged on the temperature sensing element fixing seat, the second end of the first pressure lever and the second end of the second pressure lever are both limited on the temperature sensing element and separated from the valve plate in a non-fused state of the temperature sensing element, and the first pressure lever and the second pressure lever respectively rotate downward under the action of the first elastic piece and the second elastic piece and are jointly pressed on the outer side surface of the valve plate in a fused state of the temperature sensing element due to temperature rise.
The pressure lever and the temperature sensing element can have various limiting structures, preferably, the temperature sensing element has a U-shaped structure with an upward opening, the first pressure lever and the second pressure lever are limited in the U-shaped structure, and the second end of the first pressure lever and the second end of the second pressure lever both cross the temperature sensing element.
The temperature sensing element fixing seat can have a plurality of mounting positions, and preferably, the temperature sensing element fixing seat is mounted on the top of the inner wall of the outer cover.
Further preferably, the temperature sensing element fixing seat is installed at a position centered on the top of the inner wall of the outer cover.
The first elastic element and the second elastic element can have various structures, preferably, a first bracket and a second bracket are mounted on the outer side surface of the valve body, the first end of the first compression rod is mounted on the first bracket, the first elastic element is a first torsion spring mounted between the first bracket and the first compression rod, the first end of the second compression rod is mounted on the second bracket, and the first elastic element is a second torsion spring mounted between the second bracket and the second compression rod.
Further preferably, the first bracket and the second bracket are installed at the upper part of the valve body and are respectively positioned at two sides of the valve plate.
In order to make the effort of first depression bar and second depression bar more even, first depression bar and second depression bar regard as symmetry axisymmetric setting with the vertical bisector of valve body.
Further preferably, the outer cover comprises an outer cover body and a smoke pipe connecting part, the base is arranged on the outer cover body, the base is provided with a connecting buckling spring, and the outer wall of the outer cover body is provided with a protruding block for buckling with the connecting buckling spring.
There may be various rotation connection structures between the valve plate and the valve body, preferably, a hinge seat is installed on the outer side surface of the valve body, a connection pin is installed on the hinge seat, a hinge is installed on the connection pin, and the top of the valve plate is installed on the hinge.
Compared with the prior art, the invention has the advantages that: the pressure lever of this oil extraction flue gas fire prevention check valve adopts two pressure levers, can shorten the length of pressure lever action arm, increases moment to wipe with the valve block edge when avoiding the pressure lever action and bump, and the effort that two pressure levers were applyed on the valve block is bigger, more even, and the valve block is closed inseparabler, firm, in addition, the temperature sensing element of this check valve is installed at the opposite end of first pressure lever and second pressure lever, when the temperature sensing element fuses, can thoroughly release first pressure lever and second pressure lever rapidly, thereby closes the valve block more fast, uses more reliably.
Drawings
FIG. 1 is a schematic diagram of a temperature sensing element according to an embodiment of the present invention when not fused;
FIG. 2 is a schematic diagram of a structure of a temperature sensing element according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the embodiment of the present invention with the base and cover removed;
fig. 4 is an exploded perspective view of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 4, the smoke exhaust fireproof check valve in the present embodiment includes a base 1, a valve body 2, a housing 3, a valve plate 4, a first pressing lever 51, a second pressing lever 52, a temperature sensing element fixing seat 6, a temperature sensing element 7, a first bracket 81, a second bracket 82, a first torsion spring 91, a second torsion spring 92, a connecting buckle spring 10, a hinge seat 11, a connecting pin 12, a hinge 13, and the like.
Wherein, the base 1 is installed in the outside of the housing 3, specifically, the housing 3 includes a housing body 31 and a smoke tube connecting portion 32, the base 1 is installed on the housing body 31, the connecting buckle spring 10 is installed on the base 1, and the bump 33 for buckling with the connecting buckle spring 10 is provided on the outer wall of the housing body 31.
The valve body 2 is mounted inside the housing 3, and the valve plate 4 is rotatably connected to the valve body 2. The rotation structure of the valve plate 4 is as follows: a hinge seat 11 is mounted on the outer side surface of the valve body 2, a connection pin 12 is mounted on the hinge seat 11, a hinge 13 is mounted on the connection pin 12, and the top of the valve plate 4 is mounted on the hinge 13.
The first bracket 81 and the second bracket 82 are installed on the outer side surface of the valve body 2, the first end of the first compression rod 51 is installed on the first bracket 81, the first torsion spring 91 is installed between the first bracket 81 and the first compression rod 51, and the first torsion spring 91 constitutes a first elastic member of the first compression rod having a downward rotation tendency to close the valve plate 4. The first end of the second presser bar 52 is mounted on the second bracket 82, and a second torsion spring 92 is mounted between the second bracket 82 and the second presser bar 52, the second torsion spring 92 constituting a second elastic member of the second presser bar 52 having a downward rotation tendency to close the valve plate 4.
The first bracket 81 and the second bracket 82 are symmetrically disposed, and the first compression bar 51 and the second compression bar 52 are symmetrically disposed. Specifically, the first bracket 81 and the second bracket 82 are installed at the upper portion of the valve body 2 and are located at both sides of the valve plate 4, respectively; the first compression bar 51 and the second compression bar 52 are symmetrically arranged by taking the vertical middle branching of the valve body 2 as the symmetrical axis, so that the acting force of the first compression bar 51 and the second compression bar 52 on the valve plate 4 can be more uniform.
The temperature sensing element fixing seat 6 is installed at the central position of the top of the inner wall of the outer cover 3 and is close to the hinge seat 11, the temperature sensing element 7 is welded on the temperature sensing element fixing seat 6, the temperature sensing element 7 is of a U-shaped structure with an upward opening, the first pressing rod 51 and the second pressing rod 52 are limited in the U-shaped structure, and as shown in fig. 3, the second end of the first pressing rod 51 and the second end of the second pressing rod 52 both pass through the temperature sensing element 7.
When abnormal conditions such as fire disaster and the like do not occur, the flue temperature is lower, the temperature sensing element 7 is not fused, the second end of the first compression rod 51 and the second compression rod 52 are both limited on the temperature sensing element 7, at the moment, the first compression rod 51 and the second compression rod 52 are separated from the valve plate 4 and do not exert force on the valve plate 4, and therefore the valve plate 4 can be smoothly opened under the action of flue gas flow. When abnormal conditions such as fire disaster occur, the flue temperature is higher, and when the flue temperature reaches the melting point of the temperature sensing element 7, the temperature sensing element 7 is fused, so that the restraint on the first compression rod 51 and the second compression rod 52 is released, the first compression rod 51 and the second compression rod 52 respectively rotate downwards under the action of the first torsion spring 91 and the second torsion spring 92, and the valve plate 4 is jointly pressed, so that the valve plate 4 cannot be opened by flue gas flow, and the effect of blocking flue gas is achieved. Because the check valve adopts a double-pressure-rod structure, the acting force applied on the valve plate 4 can be larger and more uniform, and the valve plate 4 is closed more tightly and firmly.
The foregoing is merely illustrative of the preferred embodiments of this invention, and it will be appreciated by those skilled in the art that variations and modifications of this invention can be made without departing from the principles of the invention, and these are considered to be within the scope of the invention.
Claims (5)
1. The utility model provides an oil extraction flue gas fire prevention check valve, includes base (1), valve body (2), dustcoat (3) and valve block (4), base (1) are installed the outside of dustcoat (3), valve body (2) are installed inside dustcoat (3), valve block (4) rotationally connect on valve body (2), have the depression bar at dustcoat (3) internally mounted, its characterized in that: the pressure lever comprises a first pressure lever (51) and a second pressure lever (52), wherein a first elastic piece which enables the first pressure lever to have a downward rotation trend and closes the valve plate (4) is arranged at the first end of the first pressure lever (51), a second elastic piece which enables the second pressure lever to have a downward rotation trend and closes the valve plate (4) is arranged at the first end of the second pressure lever (52), a temperature sensing element fixing seat (6) is also arranged in the outer cover (3), a temperature sensing element (7) which can be fused when reaching a set temperature is arranged on the temperature sensing element fixing seat (6), the second end of the first pressure lever (51) and the second end of the second pressure lever (52) are both limited on the temperature sensing element (7) and separated from the valve plate (4) in a state that the temperature sensing element (7) is fused due to the temperature rise, the first pressure lever (51) and the second pressure lever (52) respectively rotate downwards under the action of the first elastic piece and the second elastic piece and are pressed down together on the valve plate (4) and the first side surface of the first pressure lever (81) is arranged on the first side surface of the first pressure lever (81) and the first side surface of the first pressure lever (81), the first end of second depression bar (52) is installed on second support (82), first elastic component is for installing second torsional spring (92) between second support (82) and second depression bar (52), first support (81) and second support (82) are installed valve body (2) upper portion and are located respectively valve block (4) both sides, first depression bar (51) and second depression bar (52) use the vertical middling line of valve body (2) to set up for symmetry axis symmetry, temperature sensing element fixing base (6) are installed the top of dustcoat (3) inner wall.
2. The fume extraction fire protection check valve according to claim 1, wherein: the temperature sensing element (7) is of a U-shaped structure with an upward opening, the first pressure rod (51) and the second pressure rod (52) are limited in the U-shaped structure, and the second end of the first pressure rod (51) and the second end of the second pressure rod (52) both pass through the temperature sensing element (7).
3. The fume extraction fire protection check valve according to claim 1, wherein: the temperature sensing element fixing seat (6) is arranged at the center position of the top of the inner wall of the outer cover (3).
4. The fume extraction fire protection check valve according to claim 1, wherein: the outer cover (3) comprises an outer cover body (31) and a smoke pipe connecting part (32), the base (1) is installed on the outer cover body (31), the connecting buckling spring (10) is installed on the base (1), and the outer wall of the outer cover body (31) is provided with a protruding block (33) for buckling with the connecting buckling spring (10).
5. The smoke evacuation fireproof check valve according to any one of claims 1 to 4, wherein: the valve is characterized in that a hinge seat (11) is arranged on the outer side face of the valve body (2), a connecting pin (12) is arranged on the hinge seat (11), a hinge (13) is arranged on the connecting pin (12), and the top of the valve plate (4) is arranged on the hinge (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879698.2A CN107489794B (en) | 2017-09-26 | 2017-09-26 | Fire-proof check valve for discharging fume |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879698.2A CN107489794B (en) | 2017-09-26 | 2017-09-26 | Fire-proof check valve for discharging fume |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107489794A CN107489794A (en) | 2017-12-19 |
| CN107489794B true CN107489794B (en) | 2024-04-12 |
Family
ID=60652214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710879698.2A Active CN107489794B (en) | 2017-09-26 | 2017-09-26 | Fire-proof check valve for discharging fume |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107489794B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553072B (en) * | 2018-06-04 | 2024-04-02 | 宁波方太厨具有限公司 | Fireproof valve for range hood |
| CN108488445B (en) * | 2018-06-26 | 2023-12-22 | 盐城市百世达建材有限公司 | Fireproof check valve |
| CN109027272A (en) * | 2018-10-31 | 2018-12-18 | 廊坊金盾华通科技有限公司 | A kind of fire-preventing check valve |
| CN109185520B (en) * | 2018-11-06 | 2024-05-07 | 陈开兵 | Combined type flue fireproof check valve |
| CN110440036A (en) * | 2019-07-19 | 2019-11-12 | 广州市法玉环保科技有限公司 | A kind of fire-preventing check valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE32362E (en) * | 1977-05-02 | 1987-02-24 | Prefco Products, Inc. | Fire damper and method of fabrication |
| JPH11257528A (en) * | 1998-03-12 | 1999-09-21 | Inax Corp | Control mechanism for hot and cold water combination device |
| CN2729460Y (en) * | 2004-08-17 | 2005-09-28 | 杭兆全 | Check-valve for discharging oil fume and fire-proof |
| CN201306479Y (en) * | 2008-12-12 | 2009-09-09 | 张晓强 | Fire-proof check valve |
| CN201487315U (en) * | 2009-09-04 | 2010-05-26 | 张晓强 | Fireproof check valve with ejector |
| CN201610961U (en) * | 2010-02-04 | 2010-10-20 | 闫斐 | Variable-pressure type oil-smoke exhausting fireproof check valve |
| CN201973302U (en) * | 2010-11-09 | 2011-09-14 | 周繁盈 | Fire-proof check valve |
| CN103851233A (en) * | 2014-02-21 | 2014-06-11 | 武汉圣禹排水系统有限公司 | Round rotating closure flap valve |
| CN104819324A (en) * | 2015-04-27 | 2015-08-05 | 宁波方太厨具有限公司 | Range hood fire valve |
| CN105240582A (en) * | 2015-10-16 | 2016-01-13 | 宁波方太厨具有限公司 | Flue fire damper for range hood |
| CN106594333A (en) * | 2017-02-13 | 2017-04-26 | 秦浩程 | Zero-resistance flue check valve |
| CN207268320U (en) * | 2017-09-26 | 2018-04-24 | 姚世杰 | A kind of oil-smoke-exhausting fireproof check valve |
-
2017
- 2017-09-26 CN CN201710879698.2A patent/CN107489794B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE32362E (en) * | 1977-05-02 | 1987-02-24 | Prefco Products, Inc. | Fire damper and method of fabrication |
| JPH11257528A (en) * | 1998-03-12 | 1999-09-21 | Inax Corp | Control mechanism for hot and cold water combination device |
| CN2729460Y (en) * | 2004-08-17 | 2005-09-28 | 杭兆全 | Check-valve for discharging oil fume and fire-proof |
| CN201306479Y (en) * | 2008-12-12 | 2009-09-09 | 张晓强 | Fire-proof check valve |
| CN201487315U (en) * | 2009-09-04 | 2010-05-26 | 张晓强 | Fireproof check valve with ejector |
| CN201610961U (en) * | 2010-02-04 | 2010-10-20 | 闫斐 | Variable-pressure type oil-smoke exhausting fireproof check valve |
| CN201973302U (en) * | 2010-11-09 | 2011-09-14 | 周繁盈 | Fire-proof check valve |
| CN103851233A (en) * | 2014-02-21 | 2014-06-11 | 武汉圣禹排水系统有限公司 | Round rotating closure flap valve |
| CN104819324A (en) * | 2015-04-27 | 2015-08-05 | 宁波方太厨具有限公司 | Range hood fire valve |
| CN105240582A (en) * | 2015-10-16 | 2016-01-13 | 宁波方太厨具有限公司 | Flue fire damper for range hood |
| CN106594333A (en) * | 2017-02-13 | 2017-04-26 | 秦浩程 | Zero-resistance flue check valve |
| CN207268320U (en) * | 2017-09-26 | 2018-04-24 | 姚世杰 | A kind of oil-smoke-exhausting fireproof check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107489794A (en) | 2017-12-19 |
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