CN209084097U - A kind of fireproof check valve for combined flue - Google Patents

A kind of fireproof check valve for combined flue Download PDF

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Publication number
CN209084097U
CN209084097U CN201821822068.8U CN201821822068U CN209084097U CN 209084097 U CN209084097 U CN 209084097U CN 201821822068 U CN201821822068 U CN 201821822068U CN 209084097 U CN209084097 U CN 209084097U
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China
Prior art keywords
check valve
valve block
fire prevention
temperature control
compression bar
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Withdrawn - After Issue
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CN201821822068.8U
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Chinese (zh)
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陈开兵
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Individual
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Individual
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Abstract

The utility model provides a kind of fireproof check valve for combined flue, it includes check valve body and temperature control fire prevention executing agency, the check valve body includes mounting base, intake interface and valve block, there is exhaust smoke hole in the middle part of the mounting base, the intake interface and temperature control fire prevention executing agency are separately fixed at the two sides of mounting base, the valve block is installed on the inner peripheral surface of intake interface and with oil smoke impact force size rotation folding in intake interface, based on the above-mentioned technical proposal, when the temperature in common flue reaches preset temperature, temperature control fire prevention executing agency automatically opens and is compressed on valve block, prevent valve block is from freely opening, kitchen ventilator smoke pipe and common flue can effectively be separated, prevent pernicious gas or flame in common flue from entering subscriber household.

Description

A kind of fireproof check valve for combined flue
Technical field
The utility model belongs to flute check valve technical field, and in particular to a kind of fireproof check valve for combined flue.
Background technique
Check-valves is also known as check valve or non-return valve, and effect is to prevent the oil smoke in flue gas pipeline from blowing back into kitchen, draws Send out smoke blowing, taint of odour, fire etc., generally using the air outlet tube mouth of the high building family smoke exhaust ventilator of common flue and public gas flue it Between be provided with check-valves.
Flute check valve used in the prior art is generally made of intake interface and valve block, and valve block utilizes pin shaft rotation peace Mounted in the air outlet of intake interface, when kitchen ventilator when not in use, since self gravity is in close state, valve block covers valve block Air port portion;When kitchen ventilator in use, valve block is opened simultaneously separate air outlet by oil smoke impact force, exist in the check-valves use process Following defect: 1, installation site is limited to very much, can be only installed at the top of air outlet, and cannot be horizontally mounted or be mounted on out The lower section in air port;2, there are security risks, once fire occurs for a family, a large amount of high-temperature harmful gas pours in public gas flue In, if cannot close the valve block of check-valves in common flue in time at this time, these a large amount of high-temperature harmful gas can pass through cigarette The intake interface of road check-valves, which enters on oil smoke circulating direction, to be used in the user family of kitchen ventilator, to threaten resident's Life security;3, water conservancy diversion cannot be carried out to the oil smoke that family's oil smoke channel is discharged.
Summary of the invention
For the defects in the prior art, the utility model provide a kind of structure it is simple, using safe combined flue Fire-preventing check valve.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of fireproof check valve for combined flue, including check valve body and temperature control fire prevention executing agency, the check valve body Including mounting base, intake interface and valve block, there is exhaust smoke hole in the middle part of the mounting base, the intake interface is located at the mounting base Side and one end of the intake interface be connected on the circumferential surface of the exhaust smoke hole, the valve block is installed on the intake interface It is rotated on inner peripheral surface and with oil smoke impact force size in the intake interface, temperature control fire prevention executing agency is mounted on the peace Fill the other side of seat;
When the temperature in common flue is lower than preset temperature, temperature control fire prevention executing agency, which is in, locks the shape that do not work State, when the temperature in common flue reaches preset temperature, temperature control fire prevention executing agency automatically opens and is compressed on described On valve block.
As shown from the above technical solution, fireproof check valve for combined flue provided by the utility model is in use, when public When temperature in flue reaches temperature control fire prevention executing agency's preset temperature, temperature control fire prevention executing agency automatically opens and is compressed on valve On piece can effectively separate kitchen ventilator smoke pipe and public affairs so that valve block is not opened freely by oil smoke impact force size in intake interface Flue altogether, prevents pernicious gas or flame in common flue from entering in family.
An example according to the present utility model further includes the control mechanism for limiting the valve block rotation angle, institute It states control mechanism and temperature control fire prevention executing agency is located at the same side of the mounting base;The control mechanism includes fixed connects Fitting, active connection, pin shaft, torsional spring and hinged seat, the upper end of the fixedly connected part are free end, the fixedly connected part Lower end be fixedly connected with the hinged seat being fixed in the mounting base, one end of the active connection by the pin shaft with The hinged seat is hinged, and the other end of the active connection is fixed on the valve block, and the torsion spring set is set to the pin shaft;
When the valve block is sealed in the intake interface, the torsional spring is in reset state, when the valve block is by described When oil smoke impact force is opened in intake interface, the torsional spring is in twisted state.
An example according to the present utility model, temperature control fire prevention executing agency include fuse body, execute compression bar, two A guiding side plate and two locking springs;
The guiding side plate is parallel to oil smoke circulating direction in flue and is mounted on two opposite insides of the mounting base, each Guiding side plate oil smoke circulating direction along flue offers guide groove respectively, and the rod body part for executing compression bar is located at two Between the guiding side plate, and two guide grooves of the corresponding stretching in both ends of the execution compression bar;Each locking spring pair It should be set to the outside of the guiding side plate, and one end of the locking spring is installed on the end for executing compression bar, the other end It is installed on the end of the guide groove;The valve block is arranged close to the inlet end of the intake interface, and the execution compression bar is with institute It states locking spring stretching/reset and slides disengaging/compacting active connection;
When the fuse body is unblown, the locking spring is in tensional state, the end position for executing compression bar In the guide groove close to the end at oil smoke circulating direction beginning, when fuse body fusing, the execution compression bar is lost Fuse body control simultaneously drives the execution compression bar to slide into the guide groove close to oil smoke circulation by locking spring reset The end of direction end is compressed on the valve block by the active connection again at this time.
An example according to the present utility model, sloped-end of the guide groove close to oil smoke circulating direction beginning are upward Extension slot is extended to form, when the fuse body is unblown, the end for executing compression bar is stretched out from the extension slot.
An example according to the present utility model, temperature control fire prevention executing agency further includes being fixed on the valve block Card-bit part, the card-bit part upper surface have laciniation.
An example according to the present utility model, the fuse body include fuse link and connection sheet, described to be fixedly connected Recirculation hole is offered on part, the fuse link is located at the recirculation hole, and the fuse link upper end and the fixedly connected part Upper end connection, lower end is connect by the connection sheet with the execution compression bar.
An example according to the present utility model, it is described to be oriented to the protection being provided on side plate for protecting locking spring Cover.
An example according to the present utility model further includes the pod above temperature control fire prevention executing agency, The pod includes the side block aerofoil being respectively arranged on two guiding side plates and is connected to two side block aerofoils Aerofoil of fending off, the fuse link and or the fixedly connected part upper end be fixed on it is described fend off on aerofoil, two side blocks Aerofoil, the mounting base, the valve block and aerofoil of fending off surround discharge flue.
An example according to the present utility model, the mounting base two sides point opposite in temperature control fire prevention executing agency Positioning spring card is not provided with it.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar Element or part are generally identified by similar appended drawing reference.In attached drawing, each element or part might not be according to actual ratios It draws.
Fig. 1 is knot of the fireproof check valve for combined flue that provides of the utility model embodiment 1 under normal operating condition Structure schematic diagram;
Fig. 2 is the exploded view of fireproof check valve for combined flue shown in FIG. 1;
Fig. 3 is to execute compression bar after fuse link fusing in Fig. 1 to be compressed on the schematic diagram on valve block;
Fig. 4 is knot of the fireproof check valve for combined flue that provides of the utility model embodiment 2 under normal operating condition Structure schematic diagram;
In appended drawing reference:
10, check valve body;11, mounting base;12, intake interface;13, valve block;
20, temperature control fire prevention executing agency;21, compression bar is executed;22, detent piece;23, it is oriented to side plate;231, guide groove;232, Extension slot;24, locking spring;25, fuse link;26, connection sheet;27, protective cover;
31, fixedly connected part;311, recirculation hole;32, active connection;33, pin shaft;34, torsional spring;35, hinged seat;
40, pod;41, side block aerofoil;42, it fends off aerofoil;
50, positioning spring card.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solutions of the utility model.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore it is only used as example, and it is originally practical to cannot be used as a limitation limitation Novel protection scope.
It should be noted that unless otherwise indicated, technical term or scientific term used in this application should be this reality The ordinary meaning understood with novel one of ordinary skill in the art.
In the description of the present application, it is to be understood that term " middle part ", "upper", "lower", "top", "bottom", "inner", The orientation or positional relationship of the instructions such as "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this reality It is described with novel with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific Orientation construction and operation, therefore should not be understood as limiting the present invention.
Referring to figs. 1 to Fig. 3, the present embodiment provides a kind of fireproof check valve for combined flue comprising 10 He of check valve body Temperature control fire prevention executing agency 20, the check valve body 10 include the components such as mounting base 11, intake interface 12 and valve block 13.
Wherein, there is exhaust smoke hole, the intake interface 12 is located at the side of mounting base 11 and should in the middle part of the mounting base 11 One end of intake interface 12 is connected on the circumferential surface of exhaust smoke hole, the valve block 13 be installed on the inner peripheral surface of intake interface 12 and with Oil smoke impact force size rotates in intake interface 12, and temperature control fire prevention executing agency 20 is mounted on the other side of mounting base 11; When the temperature in common flue is lower than preset temperature, temperature control prevents fires executing agency 20 in locking off position, when public When temperature in flue reaches preset temperature, temperature control fire prevention executing agency 20 automatically opens and is compressed on valve block 13.
In the present invention, further include for limit valve block 13 rotate angle control mechanism, the control mechanism with Temperature control fire prevention executing agency 20 is located at the same side of mounting base 11, when the oil smoke impact force in intake interface 12 is less than control mechanism Active force or temperature control fire prevention executing agency 20 when being compressed on valve block 13, valve block 13 is in close state, when intake interface 12 Interior oil smoke impact force is greater than the active force of control mechanism and temperature control fire prevention executing agency 20 is in when locking off position, institute It states valve block 13 and is opened different angles by the oil smoke impact force size in intake interface 12.
Specifically, as depicted in figs. 1 and 2, the control mechanism includes fixedly connected part 31, active connection 32, pin shaft 33, torsional spring 34 and hinged seat 35, the upper end of the fixedly connected part 31 are free end, the lower end of the fixedly connected part 31 and solid The hinged seat 35 being scheduled in mounting base 11 is fixedly connected, and one end of the active connection 32 is cut with scissors by pin shaft 33 and hinged seat 35 It connects, the other end of the active connection 32 is fixed on valve block 13, and the torsional spring 34 is sheathed on pin shaft 33;When valve block 13 seals In intake interface 12, the torsional spring 34 is in reset state, when valve block 13 is opened by oil smoke impact force in intake interface 12, The torsional spring 34 is in twisted state.
In above-mentioned control mechanism, the structure of the fixedly connected part 31, active connection 32 and hinged seat 35 is more Kind, it does not limit one by one specifically.
In the present invention, temperature control fire prevention executing agency 20 is various structures, and the present embodiment provides a kind of costs Lower, structure better simply temperature control fire prevention executing agency 20.
Specifically, as depicted in figs. 1 and 2, temperature control fire prevention executing agency 20 include fuse body, execute compression bar 21, Two guiding side plates 23 and two locking springs 24;
The guiding side plate 23 is parallel to oil smoke circulating direction in flue and is mounted on two opposite insides of mounting base 11, each The guiding oil smoke circulating direction along flue of side plate 23 offers guide groove 231 respectively, and the rod body part for executing compression bar 21 is located at two It is oriented between side plate 23, and two guide grooves 231 of the corresponding stretching in both ends of the execution compression bar 21, each correspondence of locking spring 24 are set It is placed in the outside of guiding side plate 23, and one end of the locking spring 24 is installed on the end for executing compression bar 21, the other end is installed on The end of guide groove 231;Valve block 13 close to intake interface 12 inlet end be arranged, execute compression bar 21 with locking spring 24 stretch/ It resets and slides disengaging/compacting active connection 32;
When fuse body is unblown, the locking spring 24 is in tensional state, and the execution compression bar 21 is located at guiding Slot 231 is close to the end at oil smoke circulating direction beginning, and when fuse body fusing, the execution compression bar 21 loses fuse body control It makes and is resetted to drive by locking spring 24 and execute compression bar 21 and slide into guide groove 231 close to the end of oil smoke circulating direction end, Valve block 13 is compressed on by active connection 32 again at this time.
It, can be by guide groove to reduce the length of intake interface 12 and preventing from executing the normally-open of the influence valve block 13 of compression bar 21 231 sloped-end close to oil smoke circulating direction beginning upwardly extends to form extension slot 232, when fuse body is unblown, institute The end for stating execution compression bar 21 is stretched out from extension slot 232.
In addition, being compressed on the stability on valve block 13 to guarantee to execute compression bar 21, prevent in subscriber household kitchen ventilator flue Oil smoke wash valve block 13 open, can by the top edge of guide groove 231 and or the top edge of active connection 32 be processed into zigzag knot Structure can further increase impact force needed for the oil smoke in family's kitchen ventilator flue washes valve block 13 open in this way, and then effectively separate Kitchen ventilator smoke pipe and common flue.
To further increase the stability for executing compression bar 21 and being compressed on valve block 13, at least one can be set on valve block 13 Card-bit part 22,22 upper surface of card-bit part have laciniation, at this time card-bit part 22, guide groove 231 and active connection 32 laciniation matches the position stablized and execute compression bar 21, prevents the oil smoke impact force in intake interface 12 from crossing ambassador's lock Tight spring 24 stretches, and causes to execute the movement of compression bar 21, and then temperature control fire prevention executing agency 20 is made to fail.
In the present embodiment, the mounting base 11 is respectively arranged with positioning in the opposite two sides of temperature control fire prevention executing agency 20 Check-valves can be quickly and easily installed on the exit of subscriber household kitchen ventilator flue by Spring Card 50 in this way.Further to mention The stability for rising check-valves installation, can open up respectively the screw hole for reinforcing in 11 4 edges of mounting base.
For the usage amount for reducing fuse link 25, the overall cost of check-valves is reduced, the fuse body includes fuse link 25 With connection sheet 26, recirculation hole 311 is offered in the fixedly connected part 31, fuse link 25 is located at recirculation hole 311, and the fusing 25 upper end of piece is connect with the upper end of fixedly connected part 31, and lower end is connect by connection sheet 26 with compression bar 21 is executed, and opens up recirculation hole 311 may make the temperature Fast synchronization of the oil smoke temperature and fuse link 25 in common flue.
As shown in Fig. 2, in the present embodiment, the protection for protecting locking spring 24 is provided on the guiding side plate 23 Cover 27, without limitation, setting protective cover 27 can reduce oil smoke as far as possible and fill to 24 burn into of locking spring the shape of protective cover 27 It fills out, to avoid the failure of locking spring 24.
Fireproof check valve for combined flue working principle provided by the utility model is as follows:
Working condition 1: it when the oil smoke temperature in common flue is lower than 25 fusing-off temperature of fuse link, executes compression bar 21 and is melt Part 25 and connection sheet 26, which tense, to be simultaneously fixed in fixedly connected part 31, and locking spring 24 is in tensional state, valve block 13 by into Oil smoke impact force size in gas interface 12 controls opening and closing, when the kitchen ventilator in subscriber household is not turned on, in intake interface 12 Oil smoke impact force be zero, self-closed is on intake interface 12 under the action of torsional spring 34 for valve block 13, when in subscriber household When kitchen ventilator is opened, after the oil smoke impact force in intake interface 12 overcomes the active force of torsional spring 34, so that valve block 13 is opened.
Working condition 2: when the oil smoke temperature in common flue is equal to or more than 25 fusing-off temperature of fuse link, fuse link 25 After execution compression bar 21 loses the pulling force of fuse body, under the action of 24 reset force of locking spring, it is rapid to execute compression bar 21 for fusing It to the end for sliding to guide groove 221 and is compressed on valve block 13, to effectively separate kitchen ventilator smoke pipe and common flue, prevents from using Family family smoke pipe is on fire.
In the present embodiment, it is to be understood that oil smoke circulating direction refers to the subscriber household smoke from common flue For mouth to the direction of atmosphere or clarifier, the fusing-off temperature of the fuse link 25 is the temperature of relevant specification of country defined, i.e., molten Part 25 156 ° ± 2 ° at a temperature of fuse.
Embodiment 2:
As shown in figure 4, the present embodiment, which is based on embodiment 1, provides a kind of combination variable deflection formula fireproof check valve for flue, Improvement is: further including the pod 40 positioned at 20 top of temperature control fire prevention executing agency, pod 40 includes being respectively arranged in two A side block aerofoil 41 being oriented on side plate 23 and the aerofoil 42 of fending off for being connected to two side block aerofoils 41,25 He of fuse link, or it is solid Determine 31 upper end of connector and be fixed on to fend off on aerofoil 42, two side block aerofoils 41, mounting base 11, valve block 13 and aerofoil 42 of fending off enclose At discharge flue.
When the kitchen ventilator in subscriber household does not work, the oil smoke in common flue can pass through the smoke evacuation inside and outside pod 40 It discharges fume in channel;When the kitchen ventilator work in subscriber household, the active force of oil smoke can impact opening valve in intake interface 12 Piece 13, the discharge flue in pod 40 mainly arranges the oil smoke in subscriber household, the discharge flue master in 40 outside of pod at this time The oil smoke in common flue is arranged, quickly the oil smoke in subscriber household can be discharged in this way.In order to improve the water conservancy diversion of pod 40 Oil smoke circulating direction in fend off aerofoil 42 and flue can be arranged to 30 ° -60 ° of angle by effect.
Variable deflection formula fireproof check valve for flue provided in this embodiment not only has fire prevention and distinguished and admirable guiding double action, And its structure is simple, stability is high, low manufacture cost, and safety coefficient is high.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type, should all cover in the claim of the utility model and the range of specification.

Claims (10)

1. a kind of fireproof check valve for combined flue, it is characterised in that:
Including check valve body (10) and temperature control fire prevention executing agency (20), the check valve body (10) include mounting base (11), into Gas interface (12) and valve block (13), mounting base (11) middle part have exhaust smoke hole, and the intake interface (12) is located at the peace One end of the side and the intake interface (12) that fill seat (11) is connected on the circumferential surface of the exhaust smoke hole, valve block (13) installation It is rotated on the inner peripheral surface of the intake interface (12) and with the interior oil smoke impact force size of the intake interface (12), the temperature control Fire prevention executing agency (20) is mounted on the other side of the mounting base (11);
When the temperature in common flue is lower than preset temperature, temperature control fire prevention executing agency (20), which is in, locks the shape that do not work State, when the temperature in common flue reaches preset temperature, temperature control fire prevention executing agency (20) automatically opens and is compressed on On the valve block (13).
2. a kind of fireproof check valve for combined flue according to claim 1, it is characterised in that:
It further include the control mechanism for limiting the valve block (13) rotation angle, the control mechanism is held with temperature control fire prevention Row mechanism (20) is located at the same side of the mounting base (11);
The control mechanism includes fixedly connected part (31), active connection (32), pin shaft (33), torsional spring (34) and hinged seat (35), the upper end of the fixedly connected part (31) is free end, the lower end of the fixedly connected part (31) and is fixed on the peace Hinged seat (35) on dress seat (11) is fixedly connected, one end of the active connection (32) by the pin shaft (33) with it is described Hingedly, the other end of the active connection (32) is fixed on the valve block (13) hinged seat (35), torsional spring (34) set Set on the pin shaft (33);
When the valve block (13) is sealed in the intake interface (12), the torsional spring (34) is in reset state, when the valve When piece (13) is opened by the interior oil smoke impact force of the intake interface (12), the torsional spring (34) is in twisted state.
3. a kind of fireproof check valve for combined flue according to claim 2, it is characterised in that:
Temperature control fire prevention executing agency (20) includes fuse body, executes compression bar (21), two guiding side plates (23) and two Locking spring (24);
Guiding side plate (23) is parallel to oil smoke circulating direction in flue and is mounted on two opposite insides of the mounting base (11), Each guiding side plate (23) oil smoke circulating direction along flue offers guide groove (231) respectively, the execution compression bar (21) rod body part is located between two guiding side plates (23), and both ends two institutes of corresponding stretching of the execution compression bar (21) State guide groove (231);Each locking spring (24) is correspondingly arranged in the outside of guiding side plate (23), and the locking bullet One end of spring (24) is installed on the end for executing compression bar (21), and the other end is installed on the end of the guide groove (231);Institute It states the inlet end of valve block (13) close to the intake interface (12) to be arranged, the execution compression bar (21) is with the locking spring (24) Stretching/reset and slide disengaging/compacting active connection (32);
When the fuse body is unblown, the locking spring (24) is in tensional state, the end for executing compression bar (21) Portion is located at end of the guide groove (231) close to oil smoke circulating direction beginning, when fuse body fusing, the execution Compression bar (21), which loses fuse body control and resetted by the locking spring (24), drives the execution compression bar (21) to slide into institute The end of guide groove (231) close to oil smoke circulating direction end is stated, is compressed on institute by the active connection (32) again at this time It states on valve block (13).
4. a kind of fireproof check valve for combined flue according to claim 3, it is characterised in that:
Sloped-end of the guide groove (231) close to oil smoke circulating direction beginning upwardly extends to form extension slot (232), works as institute State fuse body it is unblown when, it is described execute compression bar (21) end stretched out at the extension slot (232).
5. a kind of fireproof check valve for combined flue according to claim 4, it is characterised in that:
The top edge of the guide groove (231) and or the active connection (32) top edge have laciniation.
6. a kind of fireproof check valve for combined flue according to claim 5, it is characterised in that:
Temperature control fire prevention executing agency (20) further includes the card-bit part (22) being fixed on the valve block (13), the card-bit part (22) upper surface has laciniation.
7. a kind of fireproof check valve for combined flue according to claim 6, it is characterised in that:
The fuse body includes fuse link (25) and connection sheet (26), offers recirculation hole on the fixedly connected part (31) (311), the fuse link (25) is located at the recirculation hole (311), and fuse link (25) upper end and the fixedly connected part (31) upper end connection, lower end is connect by the connection sheet (26) with the execution compression bar (21).
8. a kind of fireproof check valve for combined flue according to claim 7, it is characterised in that:
The protective cover (27) for protecting locking spring (24) is provided on guiding side plate (23).
9. a kind of fireproof check valve for combined flue according to claim 7 or 8, it is characterised in that:
It further include the pod (40) above temperature control fire prevention executing agency (20), the pod (40) includes difference It the side block aerofoils (41) that are installed on two guiding side plate (23) and is connected to two side block aerofoil (41) and fends off Aerofoil (42), the fuse link (25) and or the fixedly connected part (31) upper end be fixed on it is described fend off on aerofoil (42), two A side block aerofoil (41), the mounting base (11), the valve block (13) and aerofoil of fending off (42) surround discharge flue.
10. a kind of fireproof check valve for combined flue according to claim 9, it is characterised in that:
The mounting base (11) is respectively arranged with positioning spring card in the opposite two sides of temperature control fire prevention executing agency (20) (50)。
CN201821822068.8U 2018-11-06 2018-11-06 A kind of fireproof check valve for combined flue Withdrawn - After Issue CN209084097U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821822068.8U CN209084097U (en) 2018-11-06 2018-11-06 A kind of fireproof check valve for combined flue

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Application Number Priority Date Filing Date Title
CN201821822068.8U CN209084097U (en) 2018-11-06 2018-11-06 A kind of fireproof check valve for combined flue

Publications (1)

Publication Number Publication Date
CN209084097U true CN209084097U (en) 2019-07-09

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CN201821822068.8U Withdrawn - After Issue CN209084097U (en) 2018-11-06 2018-11-06 A kind of fireproof check valve for combined flue

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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185520A (en) * 2018-11-06 2019-01-11 陈开兵 A kind of fireproof check valve for combined flue

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109185520A (en) * 2018-11-06 2019-01-11 陈开兵 A kind of fireproof check valve for combined flue
CN109185520B (en) * 2018-11-06 2024-05-07 陈开兵 Combined type flue fireproof check valve

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