CN209743680U - Flue fire prevention valve - Google Patents

Abstract

The utility model discloses a flue fire prevention valve, include the flue gas passageway that comprises the shell, flue gas passageway one end has the air intake, and the relative other end is the air-out end, the air-out end is equipped with the terminal surface that suits with flue gas passageway, be equipped with the air outlet on the terminal surface, be provided with on the terminal surface with the air outlet correspond, can only be to the rotatable valve block that the air-out direction was opened, be provided with on the terminal surface and enable the valve block to close, have locking mechanical system's high temperature closing device to the air intake side by force under the settlement temperature, so that the valve block is in the closed condition all the time. The utility model discloses open the flexibility, the oil extraction cigarette is effectual, and flue gas temperature is in under very high emergency in public flue gas says, and when flue gas temperature reached the warning temperature of settlement in the public flue gas say, this high temperature closing device made the valve block that is in the open mode close by force, made the valve block of fire prevention valve be in the locking closed condition all the time to protect resident family's life safety.

Description

flue fire prevention valve

Technical Field

The utility model relates to a flue fire damper used in a kitchen using a public flue.

Background

In the kitchen that uses vertical public flue, in order to prevent the oil smoke among the flue from flowing back into the kitchen in, generally all set up such device as flue fire damper between smoke ventilator's the mouth of pipe of giving vent to anger and public flue, current flue fire damper, generally include the flue that comprises the shell, this flue has relative air intake and air outlet, the mouth of pipe of giving vent to anger of connecting smoke ventilator on the air intake, the air outlet stretches into in the public flue, be provided with the valve block that can open and close at flue air outlet department, the valve block is articulated on the flue for a slice or two through the valve block pivot, the air outlet side is provided with the high temperature closing device that enables the valve block and force to close. When the range hood is not used, the valve plate is in a closed position due to the gravity of the valve plate and covers the air outlet part; when the range hood is used, the valve plate is in the opening position, and the valve plate is far away from the air outlet. As a plurality of users share one longitudinal public flue gas channel, once a fire disaster happens to one user, a large amount of high-temperature harmful gas flows into the longitudinal public flue gas channel, and if a valve plate in a flue fire damper is not closed in time, the large amount of high-temperature harmful gas can enter the user using the range hood through the flue gas channel of the flue fire damper, so that the life safety of the user is threatened. The outer end face of an air outlet end of an existing flue fire damper is provided with a high-temperature closing device capable of enabling a valve block to be forcibly closed towards an air inlet side at a set temperature, and when the temperature of smoke in a public flue is in a very high emergency state and the temperature of the smoke in the public flue reaches a set warning temperature, the valve block in an open state is forcibly closed by the high-temperature closing device. But the high temperature closing means on the current flue fire prevention valve all adopts the strength of spring to close the valve block, lasts high temperature to the certain time in public flue gas channel, and the spring loses because of high temperature inefficacy, and the valve block loses the restrictive force of spring, can be opened once more, and high temperature harmful gas can be gushed into user's family to threaten resident family's life safety.

the existing flue fire damper is generally characterized in that an elastic clamp or an elastic sheet is arranged on a shell on one side, facing an air outlet, of a shell, and the flue fire damper is clamped on an air inlet of a flue through the elastic clamp or the elastic sheet, so that the flue fire damper is not tightly attached to the wall surface of the flue and is easy to loosen, and the ventilation phenomenon occurs at the joint of the flue fire damper and the air inlet of the flue; the wall surface of the flue gas channel is perforated, and the flue fire damper is arranged on an air inlet of the flue gas channel through screws, so that the ceramic tiles on the wall surface of the flue gas channel are easily damaged and cracked or cracked; the above modes all have the defects of inconvenient installation and replacement of the flue fire damper.

disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an oil extraction cigarette is effectual, the flue fire prevention valve that can close by force under the flue gas temperature is in very high emergency in public flue gas duct, just the valve block of fire prevention valve is in the closed condition all the time.

In order to solve the technical problem, the utility model discloses a flue gas passageway that constitutes by the shell, flue gas passageway one end has the air intake, and the relative other end is the air-out end, the air-out end is equipped with the terminal surface that suits with flue gas passageway, be equipped with the air outlet on the terminal surface, be provided with on the terminal surface with the air outlet correspond, can only be to the rotatable valve block that the air-out direction was opened, its structural feature is be provided with on the terminal surface enable the valve block to close, have locking mechanical system's high temperature closing device to the air intake side by force under the settlement temperature, so that the valve block is in closed condition all the time.

The high-temperature closing device with the locking mechanism comprises a support installed on the outer end face of the end face, a supporting shaft is arranged on the support, a pressure strip lock pressure plate is sleeved on the supporting shaft, a pressure plate pressure spring is sleeved on the supporting shaft between the pressure strip lock pressure plate and the support, a support part is provided with a hot melting piece or a separated bimetallic strip which extends to the pressure strip lock pressure plate and can be melted at a set temperature, and the pressure strip lock pressure plate is interlocked with the hot melting piece or the bimetallic strip.

The valve plate pressing strip is hinged to one end, close to the valve plate, of the supporting shaft, and corresponds to the pressing strip locking pressing plate, a sinking groove is formed in one end, facing the pressing plate pressing spring, of the pressing strip locking pressing plate, a clamping hook is arranged on the valve plate pressing strip, the clamping hook is buckled in the sinking groove, the pressing strip locking pressing plate is separated from the bimetallic strip and presses the valve plate pressing strip, and a mechanism for locking the pressing strip locking pressing plate and the valve plate pressing strip is arranged between the pressing strip locking pressing plate and the valve.

The mutual locking mechanism is that the valve plate pressing strip is opened and then is in a wedge shape at the hinged end, the corresponding ends of the pressing strip locking plate and the valve plate pressing strip are provided with conical cavities, and the valve plate pressing strip with the hinged end in the wedge shape and the pressing strip locking plate with the conical cavities form wedge-shaped locking.

Or the high temperature closing device with locking mechanical system including installing the support on the terminal surface outside, be equipped with the back shaft on the support, the one end that the back shaft is close to the valve block articulates there is the valve block layering, the cover on the back shaft be equipped with the layering lock pressure dish that the valve block layering corresponds, suit pressure disk pressure spring on the back shaft, the support position is equipped with the bimetallic strip that stretches to the hot melt piece that can melt or separate under the settlement temperature of pressure strip lock pressure dish, interlock between pressure strip lock pressure dish and the bimetallic strip is equipped with the valve block layering guide way of inside setting up along the relative outside of layering lock pressure dish, valve block layering guide way inboard is equipped with the draw-in groove, be equipped with the trip of buckle in the draw-in.

The number of the air outlets is two, and the valve plate is arranged corresponding to the air outlets; the valve plate layering is two along the back shaft symmetry setting, the bimetallic strip is formed by two sheetmetals through the welding material welding that can melt under the set temperature.

The air outlet end of the flue gas channel is provided with a flow guide cover in the same direction as the flue, and the shell is provided with a flue locking piece for fixing the shell on the flue.

the flue locking piece comprises a mounting seat, one end of the mounting seat is provided with an ear seat, a locking strip is hinged on the ear seat, and the free end of the locking strip is provided with a hook head bent towards one side of the locking strip; one end of the locking bar close to the lug seat is provided with a lug extending out of one side of the locking bar, the lug is hinged with a pull seat, and the pull seat is provided with a locking bolt.

The lug and the hook head are positioned at the same side of the lock bar, and a bulge is arranged at the approximate middle part of the other side of the lock bar.

The mounting seat is fixed on the left outer side wall and the right outer side wall of the end face, a hook groove for the hook to extend out is formed in the flow guide cover, the hook is arranged outwards relatively, and a locking bolt penetrating hole is formed in the shell; or the mounting seat is fixed on the left and right outer side walls of the air guide sleeve, the hook heads are arranged outwards relatively, and the shell is provided with a locking bolt penetrating hole; or the outer wall of the shell is provided with a mounting disc, the mounting seats are symmetrically mounted on the mounting disc, the hook heads are arranged outwards relatively, and the mounting disc is provided with locking bolt penetrating holes.

The two air outlets are symmetrically arranged on the left and right sides of the end face of the air outlet end, and the end face of the air outlet end and the upper ends of the two valve plates incline towards the air inlet direction.

After the structure is adopted, the high-temperature closing device which can forcibly close the valve block to the air inlet side at the set temperature and is provided with the locking mechanism is arranged on the end surface, so that when the temperature of the smoke in the public smoke channel is in a very high emergency state and reaches the set warning temperature, the valve block in the open state is forcibly closed by the high-temperature closing device, and the valve block of the fire-proof valve is always in the locking closed state, thereby protecting the life safety of residents. The air outlet end of the flue gas channel is provided with the guide cover with the consistent flue direction, so that the flue gas discharge direction is consistent with the flue direction, and the smoothness of the public flue gas channel is not influenced. The two air outlets are symmetrically arranged on the left side and the right side of the end face of the air outlet end, the end face of the air outlet end and the upper ends of the two valve plates incline towards the air inlet direction, and the two valve plates can be guaranteed to be naturally closed by means of self gravity. The shell is provided with a flue locking piece for fixing the shell on a flue, so that a flue fire damper is convenient to install and fix on a public flue; the locking bolt pulls the locking strip to swing, so that the hook head of the locking strip is clamped on the inner wall of the flue gas channel, and the locking strip is stable in structure and convenient to install, fix and change.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the accompanying drawings:

FIG. 1 is a schematic longitudinal sectional view of the present invention;

FIG. 2 is a schematic diagram of the structure of FIG. 1 viewed from the right;

FIG. 3 is a schematic left side view of the structure of FIG. 1;

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 2;

FIG. 5 is a schematic structural view of an embodiment of the high-temperature shutdown device of the present invention;

FIG. 6 is a schematic view of the cross-sectional structure B-B of FIG. 5;

FIG. 7 is a state diagram of the valve plate bead of FIG. 6 shown in an open position;

FIG. 8 is a schematic view of another embodiment of the high-temperature shutdown device of the present invention;

FIG. 9 is a schematic view of the cross-sectional structure C-C of FIG. 8;

FIG. 10 is a schematic view of the structure of the blade lock platen of FIG. 8;

FIG. 11 is a schematic view of a stack lock;

FIG. 12 is a schematic diagram of the structure of the right side view of FIG. 11;

FIG. 13 is a schematic view of an alternative construction of a flue lock;

FIG. 14 is a schematic diagram of the structure of the right side view of FIG. 13;

FIG. 15 is a schematic structural view of a flue lock mount;

FIG. 16 is a schematic view of a further alternative construction of a flue lock.

Detailed Description

Referring to the attached drawings, the flue fire damper comprises a flue gas channel formed by a shell 1, the flue gas channel is cylindrical, one end of the flue gas channel is provided with an air inlet 2, the other end of the flue gas channel is an air outlet end, the air outlet end is provided with an end face 3 matched with the flue gas channel, the end face 3 is provided with an air outlet 5, and the end face 3 is provided with a rotatable valve block 4 which corresponds to the air outlet 5 and can only be opened towards the air outlet direction. In this embodiment, the outer wall of the housing 1 is provided with a mounting plate, the mounting plate and the flue gas channel forming the air inlet 2 are integrally formed, and the end face 3 is fixedly connected with the mounting plate after being formed by punching. The end face of the air outlet end is provided with two air outlets 5, the periphery of each air outlet 5 is annularly provided with a boss or a groove facing the outer end face (the outer end face faces the air outlet direction of the flue gas channel), the outer end face of the air outlet end is provided with two rotatable valve plates 4 which correspond to the air outlets 5 and can only be opened towards the air outlet direction, the two air outlets 5 are arranged on the end face of the air outlet end in a bilateral symmetry mode, the end face of the air outlet end and the upper ends of the two valve plates 4 incline towards the air inlet 2, and the periphery of each valve plate 4 is provided with a bent edge or a raised line corresponding to the. The end face 3 is provided with a high-temperature closing device which can forcibly close the valve plate 4 towards the air inlet 2 side at a set temperature and is provided with a locking mechanism, so that the valve plate 4 is always in a closed state, and the shell 1 is also provided with a flue locking piece 21 which fixes the valve plate on a flue, so that a flue fire damper is installed and fixed on a public flue.

one specific structure of the high-temperature closing device with the locking mechanism is as follows: comprises a support 6 arranged on the outer end face of an end face 3, a support shaft 7 is arranged on the support 6, a thread section is arranged at one end of the support shaft 7, a notch is formed in one end of the support shaft 7 close to a valve plate 4, a valve plate pressing strip 14 is hinged in the notch through a hinge shaft 13, the valve plate pressing strips 14 are two branches symmetrically arranged along the support shaft 7, the two valve plate pressing strips 14 are respectively arranged corresponding to the two valve plates 4, a pressing strip locking and pressing disc 11 corresponding to the valve plate pressing strip 14 is sleeved on the support shaft 7, the supporting shaft 7 is sleeved with a pressure plate pressure spring 9, the position of the bracket 6 is provided with a bimetallic strip 8 which extends to a pressure strip locking pressure plate 11 and can be separated at a set temperature, the bimetallic strip 8 is formed by welding two metal strips through a welding material which can be melted at the set temperature, or a bolt or a card made of a hot melting material which can be melted at the set temperature is inserted together, and the bimetallic strip 8 can also be replaced by a hot melting strip which can be melted at the set temperature. The pressing strip locking pressing plate 11 is provided with a clamping claw 16 which extends to the bimetallic strip 8 and is clamped on the bimetallic strip 8, the bimetallic strip 8 is provided with a clamping hole corresponding to the clamping claw 16, or the bimetallic strip 8 is provided with a clamping claw which extends to the pressing strip locking pressing plate 11 and is clamped on the pressing strip locking pressing plate 11, and the pressing strip locking pressing plate 11 is provided with a clamping hole corresponding to the clamping claw, so that a mutual locking relation is formed between the pressing strip locking pressing plate 11 and the bimetallic strip 8. In this embodiment, be equipped with the back shaft mounting hole on the support 6, bimetallic strip 8 is the turning arm form, is equipped with the mounting hole that corresponds with the back shaft mounting hole on the support 6 on one of them turning arm, and bimetallic strip 8 suit is on back shaft 7, and back shaft 7 passes through the nut to be fixed on support 6, and of course, bimetallic strip can the direct mount on the support. The valve plate pressing strip locking device is characterized in that a sinking groove 17 is formed in one end, facing a pressing plate pressing spring 9, of a pressing strip locking pressing plate 11, a clamping hook 15 clamped in the sinking groove 17 is arranged on a valve plate pressing strip 14, the pressing strip locking pressing plate 11 is separated from a bimetallic strip 8 and pressed towards the valve plate pressing strip 14, a mutual locking mechanism is arranged between the pressing strip locking pressing plate 11 and the valve plate pressing strip 14, the mutual locking mechanism is that the valve plate pressing strip 14 is opened and then is in a wedge shape at the hinged end of the valve plate pressing strip 14, a conical cavity 12 is formed in the corresponding end of the pressing strip locking pressing plate 11 and the valve plate pressing strip 14, and the hinged end of the valve plate pressing strip. Referring to fig. 6 and 7, the valve plate beads 14 are crank-shaped, the bead locking plate 11 is substantially cylindrical, the two valve plate beads 14 are symmetrically arranged on the outer side of the bead locking plate 11, when the two valve plate beads 14 are in a locked state, the hooks 15 (located on the opposite inner sides of the valve plate beads 14 at this time) arranged on the valve plate beads 14 are buckled in the sunken grooves 17 of the bead locking plate 11, and one crank arm of each of the two valve plate beads 14 is axially parallel to the support shaft 7; after the two valve pressing strips 14 are opened, the opposite outer side faces of the two valve pressing strips 14 form an included angle at the hinged end, the inner cone angle of the conical cavity 12 of the pressing strip locking plate 11 is consistent with the included angle formed by the two valve pressing strips 14, and wedge-shaped locking is formed between the inner cone surface of the conical cavity 12 of the pressing strip locking plate 11 and the opposite outer side faces of the two valve pressing strips 14. When the temperature of the smoke in the public smoke channel reaches the set warning temperature, the soldering tin between the bimetallic strips 8 is melted, one of the bimetallic strips falls off from the other bimetallic strip, the batten locking pressing disc 11 is separated from the constraint of the bimetallic strips 8 and slides along the supporting shaft 7 under the action of the pressing disc compression spring 9, at the moment, the clamping hook 15 on the valve plate batten 14 is separated from the sinking groove 17 of the batten locking pressing disc 11, the batten locking pressing disc 11 presses the two valve plate battens 14 and enables the two valve plate battens 14 to be outwards opened and pressed on the two valve plates 4, and the valve plates 4 are always in a closed state due to the wedge-shaped locking formed between the valve plate batten 14 and the batten locking pressing disc 11 with the conical cavity.

In the foregoing embodiment, the flue fire damper has the air outlet end face adapted to the flue gas channel, the end face is provided with two air outlets, and the end face is provided with the rotatable valve plate corresponding to the air outlets and capable of being opened only in the air outlet direction. The high temperature shut-off device for the forced closure of the valve plate is a two-legged structure as shown in fig. 5. During practical application, because flue fire prevention valve structure itself has the variety, if: the valve block sets up in the flue gas passageway of fire prevention valve, the flue gas passageway can also be the reducing channel, the valve block can be two, also can be a slice, the opening direction of valve block can be run from opposite directions, the side is opened, go up and open, etc., for the compulsory closing of the flue fire prevention valve block that adapts to different structures, its high temperature closing device who is used for compulsorily closing the valve block can also adopt single leg structure, be about to remove the left leg or the right leg of support 6 in figure 5, only keep a landing leg, be convenient for install this high temperature closing device in the corresponding position of flue fire prevention valve, if install on air-out end terminal surface through the stabilizer blade that the tip of landing leg was rolled over outward, or install on the mounting disc of flue fire prevention valve and install on the. The high-temperature closing device for forcibly closing the valve plate can be characterized in that a support shaft 7 is arranged on the bracket 6, a pressure strip locking pressure plate 11 is sleeved on the support shaft 7, a pressure plate pressure spring 9 is sleeved on the support shaft 7 between the pressing strip locking and pressing plate 11 and the support 6, a bimetallic strip 8 which extends to the pressing strip locking and pressing plate 11 and can be melted or separated at a set temperature is arranged at the support 6, a claw 16 which extends to the bimetallic strip 8 and is clamped on the bimetallic strip 8 is arranged on the pressing strip locking and pressing plate 11, a clamping hole corresponding to the claw 16 is arranged on the bimetallic strip 8, when the temperature of the flue gas in the public flue gas channel reaches the set warning temperature, the soldering tin between the bimetallic strips is melted, one of the two plates falls off from the other plate, the pressing strip locking and pressing plate 11 is separated from the constraint of the bimetallic strip and slides along the supporting shaft 7 under the action of the pressing plate pressure spring 9, the pressing strip locking and pressing plate 11 is pressed on the valve plate 4, and the valve plate 4 is in a closed state; at the moment, the outer diameter of the pressing strip locking plate 11 is only matched with the valve plate 4, so that the valve plate can be suitable for a flue fire damper with a single valve plate and can also be suitable for a flue fire damper with double valve plates; the bracket can be of a single-leg structure or a double-leg structure. The valve plate pressing strips 14 corresponding to the pressing strip locking and pressing disc 7 are hinged to one end, close to the valve plate 4, of the supporting shaft 7, the structure is further optimized, the valve plate pressing strips 14 can be two branches symmetrically arranged along the supporting shaft 7 and correspond to the fire-proof valve for forcibly closing the two valve plates, and the valve plate pressing strips can also be one branch of fire-proof valve for forcibly closing the single valve plate. The valve plate pressing strip locking disc 11 is provided with a sunken groove 17 at one end facing the pressing disc pressing spring 9, a clamping hook 15 buckled in the sunken groove 17 is arranged on the valve plate pressing strip 14, the valve plate pressing strip 14 is outwards opened and pressed on the valve plate 4 after the pressing strip locking disc 11 is separated from the bimetallic strip 8 and pressed towards the valve plate pressing strip 14, and the valve plate 4 is always in a closed state because wedge-shaped locking is formed between the valve plate pressing strip 14 and the pressing strip locking disc 11 with the conical cavity 12.

another specific structure of the high-temperature closing device with the locking mechanism is as follows: including the support 6 mounted on the outer end face of the end face 3, see fig. 8, the support 6 is a two-leg structure, and it is also possible to remove the left leg or the right leg of the support 6 and only leave one leg. The support 6 is provided with a support shaft 7, one end of the support shaft 7 close to the valve plate 4 is hinged with a valve plate pressing strip 14, the valve plate pressing strips 14 are two branches symmetrically arranged along the support shaft 7, the two valve plate pressing strips 14 are respectively arranged corresponding to the two valve plates 4, a pressing strip locking pressing disc 11 corresponding to the valve plate pressing strip 14 is sleeved on the support shaft 7, a pressing disc pressing spring 9 is sleeved on the support shaft 7, a bimetallic strip 8 which extends to the pressing strip locking pressing disc 11 and can be separated at a set temperature is arranged at the position of the support 6, and the bimetallic strip 8 can be replaced by a hot melt strip which can be melted at the set temperature. The pressing strip locking pressing plate 11 is provided with a clamping claw 16 which extends to the bimetallic strip 8 and is clamped on the bimetallic strip 8, the bimetallic strip 8 is provided with a clamping hole corresponding to the clamping claw 16, or the bimetallic strip 8 is provided with a clamping claw which extends to the pressing strip locking pressing plate 11 and is clamped on the pressing strip locking pressing plate 11, and the pressing strip locking pressing plate 11 is provided with a clamping hole corresponding to the clamping claw, so that a mutual locking relation is formed between the pressing strip locking pressing plate 11 and the bimetallic strip 8. The opposite outer side of the trim strip locking and pressing disc 11 is provided with a valve plate trim strip guide groove 19 which is arranged inwards, the inner side of the valve plate trim strip guide groove 19 is provided with a clamping groove 18, and the valve plate trim strip 14 is provided with a clamping hook 15 which is clamped in the clamping groove 18. In this embodiment, the hinge structure of the support shaft 7, the valve plate bead 14 on the support shaft 7, the structure of the bimetal 8, and the installation structure of the bimetal 8 are the same as those of the previous embodiment. Referring to fig. 9 and 10, the valve plate locking plate 11 is substantially strip-shaped as a whole, a hole fitted with the support shaft 7 is formed in the middle of the strip-shaped locking plate 11, valve plate bead guide grooves 19 are formed in the strip-shaped locking plate 11 along the longitudinal direction of the strip-shaped locking plate 11, clamping grooves 18 are formed in the opposite inner ends of the two valve plate bead guide grooves 19, clamping claws 16 are formed on one side of the strip-shaped locking plate 11 in the width direction, and the two ends of the strip-shaped locking plate 11 in the length direction are bent to the same side along the joint of the valve plate bead guide grooves 19 and the clamping grooves 18. When the two valve plate pressing strips 14 are in a locking state, the clamping hooks 15 (which are positioned on the opposite inner sides of the valve plate pressing strips 14 at this time) arranged on the valve plate pressing strips 14 are clamped in the clamping grooves 18 of the pressing strip locking plate 11, the two valve plate pressing strips 14 are respectively positioned in the guide grooves 19, and the clamping grooves 18 are separated from the guide grooves 19 by the partition strips; after the two valve plate pressing strips 14 are opened, the two valve plate pressing strips 14 are approximately in a symmetrical parallel state, and the outer edge of the partition strip between the clamping groove 18 and the guide groove 19 is clamped in the clamping hook 15, so that the two valve plate pressing strips 14 are in a locking state. When the temperature of the smoke in the public smoke channel reaches the set warning temperature, the soldering tin between the bimetallic strips 8 is melted, one of the bimetallic strips falls off from the other bimetallic strip, the pressing strip locking pressing disc 11 is separated from the constraint of the bimetallic strips 8 and slides along the supporting shaft 7 under the action of the pressing disc pressing spring 9, at the moment, the clamping hook 15 on the valve plate pressing strip 14 and the opposite inner side surface of the valve plate pressing strip 14 form a sliding groove in the unfolding process of the valve plate pressing strip 14, the outer edge of the separation strip slides along the sliding groove, the pressing strip locking pressing disc 11 presses the two valve plate pressing strips 14, the two valve plate pressing strips 14 are opened outwards and pressed on the two valve plates 4, and the valve plates 4 are always in a closed.

the valve plate 4 is hinged on the bracket 6 through a hinge and also can be hinged on the end surface 3 through a hinge. The air outlet 5 can be one, and the corresponding valve plate 4 is one piece. The air outlet end of the flue gas channel is provided with the guide cover 20 with the consistent flue direction, the cross section of the guide cover 20 is approximately U-shaped, and the guide cover 20 is arranged, so that the flue gas discharge direction is consistent with the flue direction, and the smoothness of a public flue gas channel is not influenced.

Flue locking piece 21 includes mount pad 101, the one end of mount pad 101 is equipped with ear seat 111, ear seat 111 is integrative with mount pad 101, mount pad 101 is a board body spare, bend along its middle position to one side at the one end of mount pad 101 and form two ear seats 111, two ear seats 111 parallel symmetry sets up, parallel distance between two ear seats 111 should hold the installation locking strip, be equipped with opening 112 on the plate body of mount pad 101 between two ear seats 111 front ends, the symmetry is equipped with the pinhole hole between two ear seats 111, be equipped with mounting hole 109 on the mount pad 101. The ear seat 111 is hinged with the locking strip 102 through a pin 106, a free end of the locking strip 102 is provided with a hook head 108 bent towards one side of the locking strip 102, the locking strip 102 is a plate body, one end of the locking strip 102 close to the ear seat 111 is provided with a lug 113 extending out of one side of the locking strip 102, the lug 113 and the hook head 108 are positioned at the same side of the locking strip 102, the lug 113 is hinged with a pull seat 103 through the pin 106, the pull seat 103 is provided with a locking bolt 105, the pull seat 103 is also a plate body, the free end of the pull seat 103 is provided with a bending section 104, the bending section 104 and the body of the pull seat 103 are in a vertical state, the middle part of the bending section 104 is provided with a threaded hole, the locking bolt 105 is arranged on the bending section 104, and the middle part of the other side of the locking strip. The two lug seats 111 and the mounting seat 101 are integrally formed in a bending mode, so that the locking strip 102 has a guiding function and a covering function, and the structure is stable.

Referring to fig. 11, 12 and 15, the mounting seat 101 of the flue locking member and the lug seat 111 hinged on the mounting seat 101 extend in the same direction, the hinged end of the mounting seat 101 and the lug seat 111 is located at one end of the mounting seat, the pull seat 103 and the locking bolt 105 arranged on the pull seat 103 extend in the other direction along the hinged end of the mounting seat 101 and the mounting seat 101, and the lug seats 111 face the lug 113. The mounting seats 101 of the flue locking piece can be symmetrically and fixedly mounted on the left and right outer side walls of the end surface 3, at this time, the guide cover 20 is provided with hook grooves 211 for the hooks 108 to extend out, and the two hooks 108 are oppositely arranged outwards; the mounting seat 101 of the flue locking member may also be symmetrically and fixedly mounted on the left and right outer sidewalls of the air guide sleeve 20, and the two hooks 108 are disposed oppositely and outwardly. Be equipped with the locking bolt hole of wearing on the mounting disc, locking bolt 105 from the mounting disc quotation of flue fire prevention valve air inlet end penetrate and be connected to on drawing seat 103, through screwing up locking bolt 105, two eave tile 108 outwards open relatively and the chucking is on the inner wall of flue to accomplish flue fire prevention valve installation fixed. And a protrusion 107 arranged on one side of the locking bar 102, wherein the initial position of the protrusion 107 is abutted against the wall surface of the mounting seat 101, so that the locking bar 102 has an opening angle relative to the mounting seat 101, and the hook 108 is convenient to open outwards relatively and be clamped on the inner wall of the flue gas channel.

In another flue locking member shown in fig. 13, 14 and 15, a mounting seat 101 and a lug seat 111 of the flue locking member are sequentially hinged together, the mounting seat 101 and a pulling seat 103 extend in the same direction, and the lug seats 111 face a lug 113. The mounting seats 101 of the flue locking piece can be symmetrically and fixedly mounted on the left and right outer side walls of the end surface 3, at this time, the guide cover 20 is provided with hook grooves 211 for the hooks 108 to extend out, and the two hooks 108 are oppositely arranged outwards; the mounting seat 101 of the flue locking member may also be symmetrically and fixedly mounted on the left and right outer sidewalls of the air guide sleeve 20, and the two hooks 108 are disposed oppositely and outwardly. Be equipped with the locking bolt hole of wearing on the mounting disc, locking bolt 105 from the mounting disc quotation of flue fire prevention valve air inlet end penetrate and be connected to on drawing seat 103, through screwing up locking bolt 105, two eave tile 108 outwards open relatively and the chucking is on the inner wall of flue to accomplish flue fire prevention valve installation fixed. And the initial position of the bulge 107 arranged on one side of the locking strip 102 is abutted against the left and right outer side walls of the end surface 3 or the left and right outer side walls of the air guide sleeve 20, so that the locking strip 102 has an opening angle relative to the left and right outer side walls of the end surface 3 or the left and right outer side walls of the air guide sleeve 20, and the hook 108 is convenient to relatively open outwards and clamp on the inner wall of the flue gas channel.

The flue lock shown in fig. 16 is substantially the same in construction as the flue lock shown in fig. 13-15, except that: the tail end of the mounting seat 101 is bent outwards to form a corner, the mounting seat 101 of the flue locking piece of the structure is symmetrically mounted on a mounting disc, the hook heads 108 are arranged outwards relatively, and locking bolt penetrating holes are formed in the mounting disc.

The concrete structure of the above-mentioned embodiment is for the purpose of illustration the utility model discloses, rather than right the utility model discloses a restriction, all are in the utility model discloses the improvement on the basis all should fall into the protection scope of the utility model.

Claims (13)

1. the utility model provides a flue fire damper, includes the flue gas passageway that constitutes by shell (1), flue gas passageway one end has air intake (2), and the relative other end is the air-out end, the air-out end is equipped with terminal surface (3) that suit with flue gas passageway, be equipped with air outlet (5) on terminal surface (3), be provided with on terminal surface (3) with air outlet (5) correspond, can only to rotatable valve block (4) that the air-out direction was opened, characterized by be provided with on terminal surface (3) and enable valve block (4) to air intake (2) side force and close, have locking mechanical system's high temperature closing device under setting for the temperature, so that valve block (4) are in the closed condition all the time.

2. The flue fire damper according to claim 1, characterized in that the high temperature closing device with the locking mechanism comprises a support (6) installed on the outer end face of the end face (3), a support shaft (7) is arranged on the support (6), a pressure strip locking pressure plate (11) is sleeved on the support shaft (7), a pressure plate pressure spring (9) is sleeved on the support shaft (7) between the pressure strip locking pressure plate (11) and the support (6), a hot melt sheet or a separated bimetallic sheet (8) which extends to the pressure strip locking pressure plate (11) and can be melted at a set temperature is arranged at the position of the support (6), and the pressure strip locking pressure plate (11) and the hot melt sheet or the bimetallic sheet (8) are interlocked.

3. The flue fire damper according to claim 2, characterized in that a valve plate pressing strip (14) corresponding to the pressing strip locking pressing strip is hinged to one end, close to the valve plate (4), of the supporting shaft (7), a sunken groove (17) is formed in one end, facing the pressing strip pressing spring (9), of the pressing strip locking pressing strip (11), a clamping hook (15) clamped in the sunken groove (17) is arranged on the valve plate pressing strip (14), the pressing strip locking pressing strip (11) is separated from the bimetallic strip (8) and presses the valve plate pressing strip (14), and a mutual locking mechanism is arranged between the pressing strip locking pressing strip (11) and the valve plate pressing strip (14).

4. The flue fire damper as claimed in claim 3, wherein the interlocking mechanism is that the valve plate pressing strip (14) is wedge-shaped at the hinged end after being opened, the corresponding end of the valve plate pressing strip locking plate (11) and the valve plate pressing strip (14) is provided with a conical cavity (12), and the valve plate pressing strip (14) with the wedge-shaped hinged end and the pressing strip locking plate (11) with the conical cavity (12) form wedge-shaped locking.

5. the flue fire damper according to claim 1, characterized in that the high temperature closing device with the locking mechanism comprises a support (6) installed on the outer end face of the end face (3), a support shaft (7) is arranged on the support (6), a valve plate pressing strip (14) is hinged to one end of the support shaft (7) close to the valve plate (4), a pressing strip locking pressure plate (11) corresponding to the valve plate pressing strip (14) is sleeved on the support shaft (7), a pressure plate pressure spring (9) is sleeved on the support shaft (7), a hot melting strip or a separated bimetallic strip (8) which can be melted at a set temperature and extends to the pressing strip locking pressure plate (11) is arranged at the position of the support (6), the pressing strip locking pressure plate (11) and the bimetallic strip (8) are interlocked, a valve plate pressing strip guide groove (19) which is arranged inwards is arranged along the opposite outer side of the pressing strip locking pressure plate (11), and a clamping groove (18) is arranged, and a clamping hook (15) which is clamped in the clamping groove (18) is arranged on the valve plate pressing strip (14).

6. The flue fire damper according to any one of claims 2-5, wherein the number of the air outlets (5) is two, and the valve plate (4) is arranged corresponding to the air outlets (5); the valve plate pressing strips (14) are two branches symmetrically arranged along the supporting shaft (7), and the bimetallic strip (8) is formed by welding two metal sheets through welding materials which can be melted at a set temperature.

7. a flue fire damper according to any one of claims 1-5, characterized in that the air outlet end of the flue gas channel is provided with a flow guiding cover (20) which is in the same direction as the flue, and the housing (1) is provided with a flue locking piece (21) for fixing the housing to the flue.

8. The flue fire damper as claimed in claim 7, wherein the flue locking piece (21) comprises a mounting seat (101), one end of the mounting seat (101) is provided with an ear seat (111), a locking strip (102) is hinged on the ear seat (111), and the free end of the locking strip (102) is provided with a hook head (108) bent towards one side of the locking strip (102); one end of the locking bar (102) close to the lug seat (111) is provided with a lug (113) extending out of one side of the locking bar (102), the lug (113) is hinged with a pull seat (103), and the pull seat (103) is provided with a locking bolt (105).

9. The flue fire damper as claimed in claim 8, wherein the lug (113) and the hook (108) are located on the same side of the locking bar (102), and a protrusion (107) is provided at a substantially middle portion of the other side of the locking bar (102).

10. The flue fire damper as claimed in claim 8, wherein the mounting seat (101) is fixed on left and right outer side walls of the end face (3), the air guide sleeve (20) is provided with a hook groove (211) for the hook (108) to extend out, the hook (108) is arranged relatively outwards, and the housing (1) is provided with a locking bolt through hole.

11. the flue fire damper as claimed in claim 8, wherein the mounting seat (101) is fixed on left and right outer side walls of the air guide sleeve (20), the hook heads (108) are arranged oppositely and outwards, and the housing (1) is provided with locking bolt through holes.

12. The flue fire damper as claimed in claim 8, wherein a mounting plate is arranged on the outer wall of the housing (1), the mounting seats (101) are symmetrically arranged on the mounting plate, the hook heads (108) are oppositely arranged outwards, and locking bolt through holes are formed in the mounting plate.

13. the flue fire damper according to any one of claims 1-5, wherein the number of the air outlets (5) is two, the two air outlets are symmetrically arranged on the end surface of the air outlet end, and the end surface of the air outlet end and the upper ends of the two valve plates (4) are inclined towards the air inlet (2).