CN105240582A - Flue fire damper for range hood - Google Patents
Flue fire damper for range hood Download PDFInfo
- Publication number
- CN105240582A CN105240582A CN201510675514.1A CN201510675514A CN105240582A CN 105240582 A CN105240582 A CN 105240582A CN 201510675514 A CN201510675514 A CN 201510675514A CN 105240582 A CN105240582 A CN 105240582A
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- China
- Prior art keywords
- support
- fire
- fire prevention
- flue
- prevention valve
- Prior art date
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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
- 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
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
A flue fire damper for a range hood comprises a fire damper bottom plate and a fire damper body. A fire damper piece is arranged on the fire damper body. The flue fire damper is characterized in that the fire damper body is provided with a first support and a second support, an elastic piece is arranged on the first support, and a deformation piece capable of generating corresponding deformation along with the temperature change is arranged on the second support; a forced closing rod is arranged between the first support and the second support, the first end of the forced closing rod is arranged on the first support, and under the state that the deformation piece does not deform, the second end of the forced closing rod is blocked through the deformation piece and limited on the second support; and under the state that the deformation piece deforms due to temperature rising, the forced closing rod disengages from the deformation piece and the second support, and the fire damper piece is forced to be closed through the elastic piece. The fire damper is simple in structure and stable and reliable in work. After a flue joint outer cover is arranged, the situation of flue blockage can be effectively reduced.
Description
Technical field
The present invention relates to a kind of fire-closing valve, especially relate to a kind of kitchen ventilator fire-proof valve for flue.
Background technique
In the kitchen using longitudinally public gas flue, in order to prevent the oil smoke in gas flue from blowing back in kitchen, at the device be all provided with between the mouth of pipe and public gas flue as check valve for flue of giving vent to anger of range hood.Existing check valve for flue generally comprises the oil smoke passage be made up of shell, this oil smoke passage has relative intake grill and exhaust outlet, intake grill connects the mouth of pipe of giving vent to anger of range hood, exhaust outlet extend in public gas flue, at oil smoke passage exhaust outlet, place is provided with valve block able to turn on or off, and valve block is arranged on the inwall of oil smoke passage by horizontally disposed valve block axis of rotation.When not using kitchen ventilator, valve block due to self gravitation in the closed position, valve block covers at air-out oral area; When using kitchen ventilator, valve block is in an open position, and valve block is away from exhaust outlet.Due to many public public gas flues of longitudinal direction of user, once unshared housing's breaking out of fire, a large amount of high-temperature harmful gas pours in longitudinal public gas flue, if now close the valve block in check valve for flue not in time, these a large amount of high-temperature harmful gas can be entered in the user family using kitchen ventilator by the oil smoke passage of check valve for flue, thus threaten the life safety of resident family.
The various fire-proof valve structure with valve block is had in prior art, if the patent No. is " a kind of check fire valve for flue " disclosed in the Chinese invention patent application of ZL200910017260.9 (Authorization Notice No. is CN101608702A), this check fire valve for flue comprises the oil smoke passage be made up of shell, oil smoke passage has relative intake grill and exhaust outlet, valve block is provided with in oil smoke passage, valve block is the two panels be oppositely arranged, valve block is arranged in oil smoke passage by valve block rotating shaft is rotating, be provided with the block piece that two panels valve block can only be opened to exhaust outlet direction near intake grill one end in oil smoke passage, be provided with near intake grill side in oil smoke passage and intake grill is divided into the two-part connection strap longitudinally arranged, valve block rotating shaft is near connection strap, connection strap is provided with the high temperature shutoff device that can make valve block positive closing on the side of exhaust outlet.Although, this fire-closing valve is worked as flue-gas temperature in public gas flue and can be closed by force under being in the very high state of emergency, but its structure is comparatively complicated, the passage air-out area taken is comparatively large, and exhaust outlet local losses is comparatively large, and, when there is the state of emergency, valve block is reliable not enough to the closedown of intake grill, and in addition, the fuse link of its high temperature shutoff device changes also comparatively inconvenience.
Summary of the invention
First technical problem to be solved by this invention is for above-mentioned prior art present situation, provides that a kind of structure is simple, the reliable kitchen ventilator fire-proof valve for flue of working stability.
The present invention solves the technological scheme that above-mentioned first technical problem adopt: this kitchen ventilator fire-proof valve for flue, comprise fire-closing valve base plate and fire prevention valve body, described fire prevention valve body is provided with the fire prevention valve block that can rotate relative to valve body of preventing fires, it is characterized in that: the first support and the second support are installed on described fire prevention valve body, described first support is provided with elastic component, described second support is provided with and can varies with temperature and produce the distortion sheet of corresponding deformation, positive closing bar is provided with between the first support and the second support, the first end of this positive closing bar is arranged on the first support, under distortion sheet undeformed state, second end of positive closing bar to stop and on the secondary support bracket spacing through distortion sheet, under the state producing deformation in the Yin Wendu rising of distortion sheet, positive closing bar departs from distortion sheet and the second support and fire prevention valve block under the effect of described elastic component described in positive closing.
Preferably, described elastic component is a torsion spring, first force side of described torsion spring is arranged on the first described support, second force side of torsion spring is arranged on described positive closing bar, one end of described distortion sheet is fixed on the second described support, and the other end of distortion sheet hooks the second end of positive closing bar under undeformed state.
Further preferably, the first described support and the second support installing are in the same side of fire prevention valve body and be located at above described fire prevention valve block, the installation shaft support being fixed on and preventing fires on valve body is provided with between the first described support and the second support, described installation shaft support is provided with installation shaft, described installation shaft is provided with and is rotationally connected sheet, the top of described fire prevention valve block is fixed on described being rotationally connected on sheet.
Further preferably, the second described support is formed with downward opening locating slot, under described distortion sheet undeformed state, described distortion sheet hooks described positive closing bar and by spacing for this positive closing bar in described locating slot.Like this, after locating slot is set, effective location can be carried out to positive closing bar.
In order to improve sealing when fire prevention valve block is closed, the end face of described fire prevention valve block towards fire prevention valve body is provided with fire-closing valve stuffing box gland.In order to make sealing effect better, fire-closing valve stuffing box gland can adopt flexible material to make, and can make circular shape or triangled tip shape in the front end of fire-closing valve stuffing box gland.
In order to increase the closing forces of fire prevention valve block, described fire prevention valve body is provided with magnet, described magnet holds described fire prevention valve block under fire prevention valve block closed condition.Like this, fire prevention valve block when normally closing, except relying on gravity and normally closing, can also improve closing forces by magnet to the suction that fire prevention valve block produces further, thus effectively reduces because rear end flue air flows the vibration caused.
Second technical problem to be solved by this invention is for above-mentioned prior art present situation, provides a kind of flue blockage situation that can reduce to occur and kitchen ventilator fire-proof valve for flue easy for installation.
The present invention solves the technological scheme that above-mentioned second technical problem adopt: this kitchen ventilator fire-proof valve for flue also includes one and is located at the external flue switching outer cover of described fire-closing valve, described flue switching outer cover comprise housing body and from housing body side to the axially extended smoke pipe joint of user's side smoke tube, described housing body abuts on described fire-closing valve base plate, and fire-closing valve base plate is provided with fixing snap-on.When installing fire-closing valve, fixing snap-on can position fire-closing valve base plate.
In order to improve the sealing that fire-closing valve base plate and flue are transferred between outer cover, between described fire-closing valve base plate and housing body, sealing gasket is installed.
In order to fixing snap-on can be made to be located in securely on housing body, the outer side wall of described housing body is provided with the projection for spacing described fixing snap-on.
In order to carry out spacing to the smoke pipe mounting point of user side, the outer side wall of described smoke pipe joint is provided with for carrying out spacing spacing preiection to the mounting point of smoke pipe.Like this, when installing smoke pipe, smoke pipe cover smoke-intake pipe joint pusher just cannot advance further to spacing preiection position, then can seal with sealant tape, thus improve the sealability of smoke pipe and smoke pipe joint joint.
Compared with prior art, the invention has the advantages that: it is on the secondary support bracket spacing that the positive closing bar of this kitchen ventilator fire-proof valve for flue is deformed sheet under distortion sheet undeformed state, that removes positive closing bar after distortion sheet temperature distortion is spacing, positive closing bar acts on fire prevention valve block under the effect of elastic component, make the positive closing of fire prevention valve block and play isolated fiery effect, the very simple and working stability of the structure of whole fire-closing valve, reliably, in addition, transferring by establishing flue at the external cover of fire-closing valve, and flue is transferred, outer cover is fixed on fire-closing valve base plate outer cover simultaneously, effectively can reduce the generation of flue blockage situation, and fire-closing valve is installed very convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention under fire prevention valve block closed condition;
Fig. 2 is the perspective exploded view of fire-closing valve shown in Fig. 1;
Fig. 3 is the structural representation of the embodiment of the present invention under fire prevention valve block open mode;
Fig. 4 is the partial schematic diagram of the embodiment of the present invention under fire prevention valve block Normal Shutdown state;
Fig. 5 is the partial schematic diagram of the embodiment of the present invention under fire prevention valve block open mode;
Fig. 6 is the partial schematic diagram of the embodiment of the present invention under fire prevention valve block positive closing state.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Figure 1 to Figure 3, the kitchen ventilator fire-proof valve for flue in the present embodiment includes fire-closing valve base plate 1, fire prevention valve body 2, fire prevention valve block 3, first support 4, second support 5, positive closing bar 6, distortion sheet 7, torsion spring 8, flue switching outer cover 9, installation shaft support 10, installation shaft 11, is rotationally connected sheet 12, fire-closing valve stuffing box gland 13, magnet 14, the fixing primary clustering such as snap-on 15 and sealing gasket 16.
Installation shaft support 10 is fixed on fire prevention valve body 2, installation shaft 11 cross setting is also arranged on installation shaft support 10, being rotationally connected sheet 12 is arranged in installation shaft 10, and the top of fire prevention valve block 3 is fixed on and is rotationally connected on sheet 12, and fire prevention valve block 3 rotates around installation shaft 10.In the present embodiment, fire prevention valve block 3 adopts upper open architecture, valve block 3 upwards rotating opening of namely preventing fires, and fire prevention valve block 3 rotates rear closedown.In addition, installation shaft support 10 can adopt left-right integrated shaping to ensure to install coaxality, and certainly, installation shaft support 10 also can be divided into left fixed support and right fixed support, and only needs arrange corresponding positioning hole on left fixed support and right fixed support.
First support 4 and the second support 5 are arranged on the same side of fire prevention valve body 2 and are positioned at the top of fire prevention valve block 3, and the both sides of installation shaft support 10 are located at respectively by the first support 4 and the second support 5.The first end of positive closing bar 6 is arranged on the first support 4, second support 5 is provided with and can varies with temperature and produce the distortion sheet 7 of corresponding deformation, one end of distortion sheet 7 is fixed by screws on the second support 5, under distortion sheet 7 undeformed state, the other end of distortion sheet 7 hooks the second end of positive closing bar 6, thus by spacing for the second end of positive closing bar 6 on the second support 5.In addition, in order to carry out effective location to positive closing bar 6, the second support 5 is formed with downward opening locating slot 51, under distortion sheet 7 undeformed state, distortion sheet 7 hooks positive closing bar 6 and by spacing for positive closing bar 6 in locating slot 51.
In the present embodiment, distortion sheet 7 adopts the temperature deformation sheet be made up of two kinds or two or more metal, can be come deformation temperature and the deformation extent of control temperature distortion sheet by the component adjusting often kind of metal.
Elastic component in the present embodiment adopts torsion spring 8, and the first force side of torsion spring 8 is arranged on the first support 4, and the second force side of torsion spring 8 is arranged on positive closing bar 6.Distortion sheet 7 because in flue temperature raise and under producing deformed state, torsion spring 8 acts on positive closing bar 6 and makes the second end of positive closing bar depart from distortion sheet 7 and the second support 5, departs from the positive closing bar 6 after the second support 5 and then forces in fire prevention valve block 3 and make fire prevention valve block 3 positive closing.
In the present embodiment, on the end face of fire prevention valve body 2, fire-closing valve stuffing box gland 13 is installed at fire prevention valve block 3.Fire-closing valve stuffing box gland 13 can adopt flexible material to make, and can make circular shape or triangled tip shape in the front end of fire-closing valve stuffing box gland 13, like this, can significantly improve the sealability between fire prevention valve block 3 and fire prevention valve body 2 when valve block 3 of preventing fires is closed.In addition, in order to increase closing forces when fire prevention valve block 3 is closed, be provided with magnet 14 in the bottom of fire prevention valve body 2, when valve block 3 of preventing fires is closed, magnet 14 can produce suction to the bottom of fire prevention valve block 3 and make fire prevention valve block 3 remain on closed condition.
In the present embodiment, fire-closing valve base plate 1 is embedded on user's hot wall, and the surrounding of fire-closing valve base plate 1 arranges flange and groove, so that break sealer, the surrounding of fire-closing valve base plate 1 is provided with four tapped holes.Flue switching outer cover 9 is located at outside fire prevention valve body 2, flue switching outer cover 9 comprise housing body 91 and from housing body side to the axially extended smoke pipe joint 92 of user's side smoke tube, housing body 91 abuts on fire-closing valve base plate 1, in order to improve the sealability of fire-closing valve, sealing gasket 16 is installed between fire-closing valve base plate 1 and housing body 91.After flue switching outer cover 9 is set, housing body 91 forms the rectangular transition between fire-closing valve base plate 1 and smoke pipe joint 92, thus the area that fire prevention valve block 3 takies flue can be reduced, reduce fire prevention valve block 3 and upwards open the rear resistance to flue, and then effectively reduce the generation of flue blockage situation.
Fire-closing valve base plate 1 is provided with fixing snap-on 15, the outer side wall of housing body 91 is provided with projection 93, when fixing snap-on 15 spacing on projection 93 after, housing body 91 just can be fixed on fire-closing valve base plate 1, after fixing snap-on 15 is set, installer can be facilitated to carry out maintenance and the replacing of fire-closing valve.
In addition, the outer side wall of smoke pipe joint 92 is provided with for carrying out spacing spacing preiection 94 to the mounting point of smoke pipe.Like this, when installing smoke pipe, smoke pipe cover smoke-intake pipe joint pusher just cannot advance further to spacing preiection position, then can seal with sealant tape, increase sealability.
As shown in Figure 4, fire prevention valve block 3 is when normally closing, and fire prevention valve block 3 relies on gravity normally to close, and the magnetic force that magnet 14 produces can increase the closing forces of fire prevention valve block 3.
As shown in Figure 5, after user side kitchen ventilator is opened, blow fire prevention valve block 3 overcome gravity and upwards turn to open mode, now, flue temperature does not have the trigger temperatures value obviously changing or do not reach setting, positive closing bar 6 and torsion spring 8 are still deformed sheet 7 and block, and the space that flue gas is opened by fire prevention valve block 3 lower end is passed through smoothly.
As shown in Figure 6, after in flue, temperature reaches uniform temperature (fire-closing valve national regulations is 150 °), distortion sheet 7 produces distortion, distortion sheet 7 after distortion eliminates the stop of removing positive closing bar, positive closing bar 6 rotates to valve block side under the effect of torsion spring 8, and then oppress fire prevention valve block 3 and make the positive closing of fire prevention valve block, play the effect of isolated fire.
The foregoing is only the preferred embodiment of the present invention; it should be pointed out that for those of ordinary skills, do not departing under principle prerequisite of the present invention; can carry out multiple remodeling or improvement to the present invention, these are all regarded as within protection scope of the present invention.
Claims (10)
1. a kitchen ventilator fire-proof valve for flue, comprise fire-closing valve base plate (1) and fire prevention valve body (2), described fire prevention valve body (2) is provided with the fire prevention valve block (3) that can rotate relative to valve body of preventing fires, it is characterized in that: the first support (4) and the second support (5) are installed on described fire prevention valve body (2), described first support (4) is provided with elastic component, described second support (5) is provided with and can varies with temperature and produce the distortion sheet (7) of corresponding deformation, positive closing bar (6) is provided with between the first support (4) and the second support (5), the first end of this positive closing bar (6) is arranged on the first support (4), under distortion sheet (7) undeformed state, second end of positive closing bar (6) to stop and spacing on the second support (5) through distortion sheet (7), under the state producing deformation in distortion sheet (7) Yin Wendu rising, positive closing bar (6) departs from distortion sheet (7) and the second support (5) and fire prevention valve block (3) under the effect of described elastic component described in positive closing.
2. kitchen ventilator fire-proof valve for flue according to claim 1, it is characterized in that: described elastic component is a torsion spring (8), first force side of described torsion spring (8) is arranged on described the first support (4), second force side of torsion spring (8) is arranged on described positive closing bar (6), one end of described distortion sheet (7) is fixed on described the second support (5), and the other end of distortion sheet (7) hooks the second end of positive closing bar (6) under undeformed state.
3. kitchen ventilator fire-proof valve for flue according to claim 2, it is characterized in that: described the first support (4) and the second support (5) are arranged on the same side of fire prevention valve body (2) and are located at the top of described fire prevention valve block (3), the installation shaft support (10) being fixed on and preventing fires on valve body (2) is provided with between described the first support (4) and the second support (5), described installation shaft support (10) is provided with installation shaft (11), described installation shaft (11) is provided with and is rotationally connected sheet (12), the top of described fire prevention valve block (3) is fixed on described being rotationally connected on sheet (12).
4. kitchen ventilator fire-proof valve for flue according to claim 3, it is characterized in that: on described the second support (5), be formed with downward opening locating slot (51), under described distortion sheet (7) undeformed state, described distortion sheet (7) hooks described positive closing bar (6) and by spacing for this positive closing bar (6) in described locating slot (51).
5. kitchen ventilator fire-proof valve for flue according to claim 1, is characterized in that: on the end face of described fire prevention valve block (3) towards fire prevention valve body (2), be provided with fire-closing valve stuffing box gland (13).
6. kitchen ventilator fire-proof valve for flue according to claim 1, it is characterized in that: on described fire prevention valve body (2), be provided with magnet (14), described magnet (14) holds described fire prevention valve block (3) under fire prevention valve block closed condition.
7. the kitchen ventilator fire-proof valve for flue according to claim arbitrary in claim 1 to 6, it is characterized in that: also include one and be located at described fire prevention valve body (2) flue switching outer cover (9) outward, described flue switching outer cover (9) comprise housing body (91) and from housing body side to the axially extended smoke pipe joint (92) of user's side smoke tube, described housing body (91) abuts on described fire-closing valve base plate (1), and fire-closing valve base plate (1) is provided with fixing snap-on (15).
8. kitchen ventilator fire-proof valve for flue according to claim 7, is characterized in that: between described fire-closing valve base plate (1) and housing body (91), be provided with sealing gasket (16).
9. kitchen ventilator fire-proof valve for flue according to claim 7, is characterized in that: on the outer side wall of described housing body (91), be provided with the projection (93) for spacing described fixing snap-on (13).
10. kitchen ventilator fire-proof valve for flue according to claim 7, is characterized in that: be provided with on the outer side wall of described smoke pipe joint (92) for carrying out spacing spacing preiection (94) to the mounting point of smoke pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675514.1A CN105240582A (en) | 2015-10-16 | 2015-10-16 | Flue fire damper for range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675514.1A CN105240582A (en) | 2015-10-16 | 2015-10-16 | Flue fire damper for range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105240582A true CN105240582A (en) | 2016-01-13 |
Family
ID=55038348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510675514.1A Pending CN105240582A (en) | 2015-10-16 | 2015-10-16 | Flue fire damper for range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105240582A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489794A (en) * | 2017-09-26 | 2017-12-19 | 姚世杰 | A kind of oil-smoke-exhausting fireproof check valve |
| CN107961460A (en) * | 2017-05-09 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of automatic fire extinguisher of range hood smoke evacuation system |
| CN107975842A (en) * | 2017-05-27 | 2018-05-01 | 宁波方太厨具有限公司 | Common duct smoke evacuation system and control method |
| CN108488445A (en) * | 2018-06-26 | 2018-09-04 | 盐城市百世达建材有限公司 | A kind of fire-preventing check valve |
| CN109681680A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | A kind of monolithic valve fireproof check valve for flue |
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| CN102818056A (en) * | 2011-06-12 | 2012-12-12 | 解焕强 | Fire-proof non-return valve for flue |
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| CN202756695U (en) * | 2012-06-08 | 2013-02-27 | 周宝柱 | Air duct check valve |
| CN203082287U (en) * | 2013-01-16 | 2013-07-24 | 张鸣元 | Flue check valve |
| CN203784380U (en) * | 2014-01-17 | 2014-08-20 | 邱玉海 | Fire-proof flue check valve |
| CN205064971U (en) * | 2015-10-16 | 2016-03-02 | 宁波方太厨具有限公司 | Flue valve of preventing fires for lampblack absorber |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107961460A (en) * | 2017-05-09 | 2018-04-27 | 宁波方太厨具有限公司 | A kind of automatic fire extinguisher of range hood smoke evacuation system |
| CN107975842A (en) * | 2017-05-27 | 2018-05-01 | 宁波方太厨具有限公司 | Common duct smoke evacuation system and control method |
| CN107975842B (en) * | 2017-05-27 | 2023-08-18 | 宁波方太厨具有限公司 | Public flue smoke discharging system and control method |
| CN107489794A (en) * | 2017-09-26 | 2017-12-19 | 姚世杰 | A kind of oil-smoke-exhausting fireproof check valve |
| CN107489794B (en) * | 2017-09-26 | 2024-04-12 | 姚世杰 | Fire-proof check valve for discharging fume |
| CN109681680A (en) * | 2017-10-18 | 2019-04-26 | 宁波方太厨具有限公司 | A kind of monolithic valve fireproof check valve for flue |
| CN109681680B (en) * | 2017-10-18 | 2024-01-16 | 宁波方太厨具有限公司 | Fireproof check valve for flue of single-chip valve |
| CN108488445A (en) * | 2018-06-26 | 2018-09-04 | 盐城市百世达建材有限公司 | A kind of fire-preventing check valve |
| CN108488445B (en) * | 2018-06-26 | 2023-12-22 | 盐城市百世达建材有限公司 | Fireproof check valve |
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Application publication date: 20160113 |