CN112443682A

CN112443682A - Flue check fire prevention valve and flue system with same

Info

Publication number: CN112443682A
Application number: CN201910826555.4A
Authority: CN
Inventors: 韩青; 徐常华; 韩文强
Original assignee: Shandong Zhongke Hengji Building Material Co ltd
Current assignee: Shandong Zhongke Hengji Building Material Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2021-03-05

Abstract

The invention discloses a flue non-return fireproof valve and a flue system with the same, and the flue non-return fireproof valve comprises a mounting disc with a through hole, wherein an air inlet channel is arranged on the front surface of the mounting disc, an air outlet end face is correspondingly arranged on the back surface of the mounting disc, an air outlet is arranged on the air outlet end face, a rotatable valve plate which can only be opened towards the air outlet direction is arranged in the air inlet channel or on the air outlet end face or on the mounting disc, a flow guide cover is arranged on the back surface of the mounting disc, fireproof valve locking pieces are symmetrically arranged on the back surfaces of the mounting disc in the left cover wall and the right cover wall of the flow guide cover, and hook head grooves for enabling the fireproof valve locks. The flue non-return fire damper is convenient to install and fix on a public flue, the hook piece is pulled to move along the hook groove through the locking bolt, so that the hook piece is clamped on the inner wall of the flue, and the flue non-return fire damper is stable in structure and convenient to install, fix and replace.

Description

Flue check fire prevention valve and flue system with same

Technical Field

The invention relates to a flue non-return fire-proof valve used in a kitchen using a public flue and a flue system with the same.

Background

In a kitchen using a longitudinal public flue, in order to prevent oil smoke in the flue from flowing back into the kitchen, a device such as a flue check fire damper is generally arranged between an air outlet pipe orifice of a range hood and the public flue, the existing flue check fire damper generally comprises a flue channel formed by a shell, the flue channel is provided with an air inlet and an air outlet which are opposite, the air outlet pipe orifice of the range hood is connected to the air inlet, the air outlet extends into the public flue, a valve plate capable of being opened and closed is arranged at the air outlet of the flue channel, one or two valve plates are hinged on the flue channel through a valve plate rotating shaft, and a high-temperature closing device capable of forcibly closing the valve plates is arranged on the air outlet side. 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. The existing flue check 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 the shell, and the flue check fire damper is clamped on an air inlet of a flue gas channel through the elastic clamp or the elastic sheet; the other installation mode is to punch a hole on the wall surface of the flue, and install the flue check fire damper on the air inlet of the flue through a screw, and the installation and fixation mode is easy to damage the ceramic tiles on the wall surface of the flue and cause the ceramic tiles to crack or crack; the above modes all have the defects that the installation and the replacement of the flue check fire damper are inconvenient.

Meanwhile, 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 the flue check fire-proof valve 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 check fire-proof valve, so that the life safety of the user is threatened. The outer end face of an air outlet end of an existing flue non-return fireproof valve is provided with a high-temperature closing device which can enable 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 reaches a set warning temperature, the high-temperature closing device enables the valve block in an open state to be forcibly closed. However, the valve plate is closed by the high-temperature closing device on the existing flue check fire-proof valve by the aid of the force of the spring, when the high temperature is continuously reached to a certain time in the public flue, the spring loses effectiveness due to high temperature, the valve plate loses the restriction force of the spring and can be opened again, and high-temperature harmful gas can flow into a user home, so that life safety of the resident is threatened.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a flue fire damper which is convenient to install and fix on a public flue, meanwhile, the flue fire damper can be forcibly closed when the flue gas temperature in the public flue is in a very high emergency state, and a valve plate of the fire damper is always in a closed state; the invention also provides a flue system with the flue non-return fire-proof valve.

The installation disc comprises an installation disc with through holes, and is structurally characterized in that an air inlet channel is arranged on the front side of the installation disc, an air outlet is formed in the air inlet channel, a rotatable valve block which can only be opened towards the air outlet direction is arranged in the air inlet channel or on the installation disc, a flow guide cover is arranged on the back side of the installation disc, fire prevention valve locking pieces are symmetrically arranged on the back side of the installation disc in the left cover wall and the right cover wall of the flow guide cover, and hook head grooves which enable the fire prevention valve locking pieces to extend out are formed in the left cover wall and the right cover wall of the flow guide.

Or the invention comprises a mounting disc with through holes, and is structurally characterized in that an air inlet channel is arranged on the front side of the mounting disc, an air outlet end face is correspondingly arranged on the back side of the mounting disc, an air outlet is arranged on the air outlet end face, a rotatable valve plate which can only be opened towards the air outlet direction is arranged on the air outlet end face or the mounting disc, a flow guide cover is arranged on the back side of the mounting disc, fire prevention valve locking pieces are symmetrically arranged on the back sides of the mounting disc in the left and right cover walls of the flow guide cover, and hook grooves for enabling the fire prevention valve locking pieces to extend out are arranged on the left and right cover walls.

The fire prevention valve locking piece include the spacing sleeve of fixed mounting at the mounting disc back, be equipped with the bolt that penetrates from the mounting disc front in the spacing sleeve, the spiro union has the hook piece in the bolt, the hook piece is relative overhanging in the eave tile groove, the hook piece passes through the bolt pulling chucking on the inner wall of flue gas flue.

The hook groove is in a corner shape and is provided with a straight groove section which is horizontally arranged and a vertical groove section which is vertically and upwards arranged along the inner end part of the straight groove section, the flow guide cover wall on the upper part of the vertical groove section is provided with a concave part which is relatively inwards concave, the limiting sleeve is close to the straight groove section of the hook groove, and the upper end of the hook piece is attached to the concave part when the hook piece is upright.

The straight groove section and the vertical groove section of the hook head groove are in smooth transition.

The outer sides of the left and right cover walls of the air guide cover are provided with hook locking tongues which enable the upper ends of the hook to be attached to the concave parts when the hook is erected.

The outer end of the hook is provided with a raised hook head facing the mounting disc.

The invention adopts another technical scheme that the fire-proof valve installation plate comprises an installation plate with through holes, and is structurally characterized in that an air inlet channel is arranged on the front side of the installation plate, an air outlet is arranged in the air inlet channel, a rotatable valve plate which can only be opened towards the air outlet direction is arranged in the air inlet channel or on the installation plate, and fire-proof valve locking pieces are symmetrically arranged on the left side and the right side of the back side of the installation plate.

Or including the mounting disc that has the through-hole, its structural feature is that the mounting disc openly is equipped with inlet channel, and the mounting disc back corresponds is equipped with air-out end terminal surface, is equipped with the air outlet on the air-out end terminal surface, be equipped with the rotatable valve block that can only open to the air-out direction on air-out end terminal surface or the mounting disc, be equipped with fire prevention valve locking piece in the mounting disc back left and right sides symmetry.

The back of the mounting disc is provided with a diversion cover, and the fire-proof valve locking piece is arranged on the opposite outer sides of the left and right cover walls of the diversion cover.

The fire damper locking piece comprises a limiting sleeve fixedly mounted on the back face of a mounting disc, a bolt penetrating from the front face of the mounting disc is arranged in the limiting sleeve, a hook piece is connected to the inner end of the bolt in a threaded mode and extends outwards relatively, hook piece supporting lugs extending outwards relatively are arranged on the left cover wall and the right cover wall of a flow guide cover below the limiting sleeve and the hook piece, and the hook piece is clamped on the inner wall of a flue gas channel through bolt pulling.

The outer sides of the left and right cover walls of the air guide sleeve are provided with hook locking tongues which enable the upper ends of the hook to be attached to the left and right cover walls of the air guide sleeve when the hook is erected.

And a high-temperature closing device which can forcibly close the valve plate to the air inlet side at a set temperature and is provided with a locking mechanism is arranged on the end face of the air outlet end or the mounting disc, so that the valve plate is always in a closed state.

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

The valve block pressing device is characterized in that one end, close to a valve block, of the supporting shaft is hinged with a valve block pressing strip, the locking pressing plate and the valve block pressing strip are correspondingly arranged, a sinking groove is formed in one end, facing the pressing plate pressing spring, of the locking pressing plate, a clamping hook is arranged on the valve block pressing strip, the locking pressing plate is separated from a bimetallic strip and presses the valve block pressing strip, and a mechanism for locking the locking pressing plate and the valve block pressing strip mutually is arranged between the locking pressing plate and the valve block.

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 locking pressure plate and the valve plate pressing strip are provided with conical cavities, and the hinged end is in a wedge shape and forms wedge-shaped locking with the valve plate pressing strip with the conical cavities.

The air outlet is provided with two air outlets which are arranged symmetrically left and right on the end surface of the air outlet end, the sealing ring is sleeved on the edge of the air outlet, and the end surface of the air outlet end and the upper ends of the two valve plates incline towards the direction of the air inlet.

The end face is provided with an air outlet, the valve block is one piece, and one side of the valve block is hinged to the end face.

And the valve plate is hinged on the end surface of the left side or the right side of the air outlet.

The valve plate is hinged on the end face of the upper side or the lower side of the air outlet.

The end face is provided with an air outlet, the valve plate on the air outlet is divided into a large part and a small part, wherein the smaller part of the valve plate is fixed on the air outlet, and the larger part of the valve plate is hinged on the smaller part of the valve plate.

The flue system comprises a public flue, wherein a flue check fire damper mounting opening is formed in a set part of the public flue; the flue check fire-proof valve is arranged in the flue check fire-proof valve mounting opening.

After the structure is adopted, the installation disc is provided with the fireproof valve locking piece for fixing the installation disc on the flue, so that the flue non-return fireproof valve is convenient to install and fix on the public flue gas channel; the hook piece is pulled to move along the hook head groove through the locking bolt, so that the hook piece is clamped on the inner wall of the flue gas channel, and the hook is stable in structure and convenient to install, fix and replace. And the end face is provided with a high-temperature closing device which can forcibly close the valve plate to the air inlet side at a set temperature and is provided with a locking mechanism, when the temperature of the flue gas in the public flue gas channel is in a very high emergency state and reaches a set warning temperature, the valve plate in the open state is forcibly closed by the high-temperature closing device, and the valve plate of the fire-proof valve is always in a locking closed state, so that the life safety of residents is protected. The air outlet end of the flue gas channel is provided with the guide cover with the consistent flue gas flow direction, so that the flue gas discharge direction is consistent with the flue gas flow 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 surface of the air outlet end, and the end surface of the air outlet end and the upper ends of the two valve plates incline towards the direction of the air inlet, so that the two valve plates can be naturally closed by means of self gravity; the sealing ring is sleeved on the edge of the air outlet, so that the noise of opening and closing the valve plate can be reduced, and the sealing is relatively kept.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended 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 view of the cross-sectional structure A-A of FIG. 2;

FIG. 4 is a schematic side view of the present invention;

FIG. 5 is a schematic side view of another embodiment of the present invention;

FIG. 6 is a schematic view of the fire damper lock of the present invention;

FIG. 7 is a schematic top view of FIG. 6;

FIG. 8 is a schematic structural view showing a use state of the fire damper lock;

FIG. 9 is a schematic view of the high temperature shut down device of the present invention;

FIG. 10 is a schematic view of the cross-sectional structure B-B of FIG. 9;

FIG. 11 is a state diagram of the valve plate bead of FIG. 10 shown in an open position;

FIG. 12 is another schematic view of the right side view of FIG. 1;

FIG. 13 is a schematic view of a further alternative construction to the right of FIG. 1;

FIG. 14 is a schematic view of another embodiment of the right side view of FIG. 1;

FIG. 15 is a schematic longitudinal sectional view of another embodiment of the present invention;

FIG. 16 is a schematic diagram of the structure of a flue system with a flue check fire damper.

Detailed Description

Referring to fig. 1-4, the flue non-return fire damper includes a mounting plate 26 with a through hole, an air inlet channel 1 is arranged on the front side of the mounting plate 26, one end of the air inlet channel 1 is provided with an air inlet 2, the other end is an air outlet end, an air outlet end face 3 is correspondingly arranged on the back side of the mounting plate 26, an air outlet 5 is arranged on the air outlet end face 3, the two air outlets 5 are arranged in a bilateral symmetry manner on the end face of the air outlet end, a sealing ring 25 is sleeved on the edge of the air outlet 5, a rotatable valve plate 4 which can only be opened towards the air outlet direction is arranged on the air outlet end face 3, the end face of the air outlet end and the upper ends of the two valve plates 4 incline towards the air inlet. The sealing ring is sleeved on the edge of the air outlet, so that the noise of opening and closing the valve plate can be reduced, the valve plate is kept sealed relatively, and the mounting disc 26, the air inlet channel 1 and the air outlet end face 3 are riveted or welded together after being respectively processed and molded. The back of the mounting disc 26 is provided with a diversion cover 20 which is consistent with the direction of flue gas flow, the back of the mounting disc 26 in the left and right cover walls of the diversion cover 20 is symmetrically provided with fireproof valve locking pieces 21 so as to install and fix a flue check fireproof valve on a public flue gas channel, and the diversion cover 20 is arranged to enable the discharge direction of flue gas to be consistent with the direction of flue gas flow, so that the smoothness of the public flue gas channel is not influenced. The cross section of the air guide sleeve 20 is approximately U-shaped, and hook grooves 22 for extending the fire-proof valve locking pieces 21 are arranged on the left and right cover walls of the air guide sleeve 20. The end face 3 is also provided with a high-temperature closing device which can forcibly close the valve plate 4 to 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.

The fire damper locking member 21 shown in fig. 6-8 comprises a limiting sleeve 24 fixedly mounted on the back of a mounting disc 26, the fixing mode can be welding or riveting, the length of the limiting sleeve 24 is matched with the wall thickness of a public flue gas channel, a bolt 10 penetrating from the front of the mounting disc 26 is arranged in the limiting sleeve 24, a bolt penetrating hole corresponding to the inner hole of the limiting sleeve 24 is arranged on the mounting disc 26, a hook 16 is screwed at the inner end of the bolt 10, the hook 16 is a plate body and is provided with a base 19, a through threaded hole 18 is formed in the base 19, the axis of the hook 16 and the axis of the threaded hole 18 are in the same plane, a raised hook head is arranged at the end of the hook 16, and faces the mounting disc. The hook piece 16 extends outwards from the hook head groove 22, and the hook piece 16 is pulled to be clamped on the inner wall of the flue gas channel through the bolt 10.

Referring to fig. 4, the hook groove 22 is in a corner shape, and has a horizontally arranged straight groove section and a vertical groove section vertically and upwardly arranged along the inner end of the straight groove section, the straight groove section and the vertical groove section are in smooth transition, the cover wall of the air guide sleeve 20 on the upper portion of the vertical groove section has a recessed portion 23 relatively recessed inwardly, the limiting sleeve 24 is close to the straight groove section of the hook groove 22, and the upper end of the hook 16 can be attached in the recessed portion 23 when standing vertically. The hook spring bolt 30 of the upper end attached in the depressed part 23 when making hook 16 stand upright is arranged on the left and right two cover wall outsides of the air guide sleeve 20, the hook spring bolt 30 is installed on the left and right two cover wall outsides of the air guide sleeve 20 in a riveting or welding mode, the mounting disc is kept away from by the riveting or welding end of the hook spring bolt 30, a smaller section of overlapping surface is arranged between the hook spring bolt 30 and the hook 16, and the length of the overlapping surface can ensure that the upper end is attached in the depressed part 23 when the hook 16 stands upright. During installation, the bolt 10 penetrates out of the locking bolt penetrating hole and the limiting sleeve 24 from the outer side of the installation disc 26 and is connected to the threaded hole 18 in the base 19, at the moment, the base 19 is located in the inner sides of the hook grooves 22 on the left side and the right side of the flow guide cover 20 relatively, the bolt 10 is screwed, the base 19 moves towards the direction of the installation disc, the hook piece 16 is separated from the locking of the hook piece locking tongue 30, at the moment, the hook piece 16 extends outwards relatively and is in a horizontal state, the lower groove of the straight groove section is used for supporting the hook piece 16 to keep the hook piece 16 in the horizontal state, namely, the two fire damper locking pieces 21 are symmetrically arranged on the fire damper, the protruding hook head at the end part of the hook piece 16 faces the installation disc 26, and the protruding hook head at the end part of the hook piece 16.

The flue non-return fire-proof valve shown in figure 5 is basically the same as the structure, except that: the back of a mounting disc 26 on the opposite outer sides of the left and right cover walls of the air guide sleeve 20 is symmetrically provided with a fireproof valve locking piece 21, the fireproof valve locking piece 21 comprises a limiting sleeve 24 fixedly mounted on the back of the mounting disc 26, a bolt 10 penetrating from the front of the mounting disc 26 is arranged in the limiting sleeve 24, the inner end of the bolt 10 is in threaded connection with a hook 16, the hook 16 extends outwards relatively, hook support lugs 28 extending outwards relatively are arranged on the left and right cover walls of the air guide sleeve 20 below the limiting sleeve 24 and the hook 16, the hook support lugs 28 can be independent parts and are mounted on the left and right cover walls of the air guide sleeve 20 in a riveting or welding mode, the left and right cover walls of the air guide sleeve 20 can also be formed in a punching mode, and at the moment, the left and right cover walls of the air guide sleeve. Hook locking tongues 30 are arranged on the outer sides of the left and right cover walls of the air guide sleeve 20, and the upper ends of the hook 16 are attached to the left and right cover walls of the air guide sleeve 20 when the hook is erected. The riveting or welding end of the hook spring bolt 30 is far away from the mounting disc, a small overlapping surface is arranged between the hook spring bolt 30 and the hook 16, and the length of the overlapping surface is enough to ensure that the upper end of the hook 16 is attached to the left and right cover walls of the air guide cover 20 when the hook is upright. During the installation, wear out bolt 10 from the locking bolt hole of wearing and spacing stop sleeve 24 in the mounting disc 26 outside, connect in screw hole 18 on base 19, twist bolt 10, base 19 removes towards the mounting disc direction, hook 16 breaks away from the locking of hook spring bolt 30, hook 16 is overhanging relatively this moment, it is the horizontality to be supported by hook support ear 28, two fire prevention valve locking pieces 21 are symmetrical setting on the fire prevention valve promptly, the bellied eave tile of hook 16 tip is towards mounting disc 26, continue to screw bolt 10 and then the bellied eave tile of hook 16 tip pushes down public flue gas flue inner wall and realize flue non-return fire prevention valve's whole installation fixed.

The high-temperature closing device shown in fig. 9-11 comprises a bracket 6 mounted on the outer end face of the end face 3, a support shaft 7 is arranged on the bracket 6, a thread section is arranged at one end of the support shaft 7, a notch is arranged at one end of the support shaft 7 close to the 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 locking pressing plate 11 corresponding to the valve plate pressing strip 14 is sleeved on the support shaft 7, a pressing plate pressing spring 9 is sleeved on the support shaft 7, a bimetal 8 which can be separated at a set temperature and extends to the locking pressing plate 11 is arranged at the position of the bracket 6, the bimetal 8 is formed by welding two metal sheets through welding materials which can be melted at the set temperature, or a bolt or a card, the bimetal 8 may also be replaced by a thermal fuse that is able to melt at a set temperature. The locking pressure plate 11 is provided with a 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 claw 16, or the bimetallic strip 8 is provided with a claw which extends to the pressing strip locking pressure plate 11 and is clamped on the pressing strip locking pressure plate 11, and the pressing strip locking pressure plate 11 is provided with a clamping hole corresponding to the claw, so that the pressing strip locking pressure plate 11 and the bimetallic strip 8 form a mutual locking relation. 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 8 can the direct mount on support 6. One end of the locking pressure plate 11, which faces the pressure plate pressure spring 9, is provided with a sunken groove 17, a clamping hook 15 which is clamped in the sunken groove 17 is arranged on the valve plate trim strip 14, the locking pressure plate 11 is separated from the bimetallic strip 8 and pressed towards the valve plate trim strip 14, a mutual locking mechanism is arranged between the locking pressure plate 11 and the valve plate trim strip 14, the mutual locking mechanism is that the valve plate trim strip 14 is opened and then is in a wedge shape at the hinged end, the corresponding ends of the locking pressure plate 11 and the valve plate trim strip 14 are provided with conical cavities 12, and the hinged end is in a wedge shape, so that the valve plate trim strip 14 and the valve plate trim strip 14 with the conical. Referring to fig. 10 and 11, the valve plate beads 14 are crank-shaped, the locking plate 11 is substantially cylindrical, the two valve plate beads 14 are symmetrically arranged outside the locking plate 11, when the two valve plate beads 14 are in a locking 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 sinking grooves 17 of the 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 locking pressing disc 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 locking pressing disc 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 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 pressing strip 14 is separated from the sinking groove 17 of the locking pressing disc 11, the locking pressing disc 11 presses the two valve plate pressing strips 14, the two valve plate pressing strips 14 are 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 pressing strips 14 and the locking pressing disc 11 with the.

In the foregoing embodiment, the flue check fire damper has an air outlet end face adapted to the flue gas channel, two air outlets are disposed on the end face, and a rotatable valve plate corresponding to the air outlets and capable of being opened only in the air outlet direction is disposed on the end face. The high-temperature closing device for forcibly closing the valve plate is of a double-leg structure shown in fig. 9, and in practical application, the flue check fire-proof valve structure has diversity, such as: the valve plate is arranged in a smoke channel of the fire damper, the smoke channel can also be a diameter-variable channel, the valve plates can be two or one, the opening direction of the valve plates can be divided into two, side, upper and lower, and the like, in order to adapt to the forced closing of the valve plates of the flue non-return fire damper with different structures, the high-temperature closing device for forcibly closing the valve plates can also adopt a single-leg structure, namely, a left leg or a right leg of a bracket 6 in the figure 9 is removed, only one leg is reserved, the high-temperature closing device is convenient to be installed at the corresponding part of the flue non-return fire damper, and for example, the support legs which are folded outwards at the end parts of the support legs are installed on the end face of an air outlet end, or installed on a mounting plate of the flue non-. The high-temperature closing device for forcibly closing the valve plate can be that a support shaft 7 is arranged on a support 6, a lock pressing plate 11 is sleeved on the support shaft 7, a pressing plate pressure spring 9 is sleeved on the support shaft 7 between the lock pressing plate 11 and the support 6, a bimetallic strip 8 which extends to the lock pressing plate 11 and can be melted or separated at a set temperature is arranged on the support 6, a clamping claw 16 which extends to the bimetallic strip 8 and is clamped on the bimetallic strip 8 is arranged on the lock pressing plate 11, a clamping hole corresponding to the clamping claw 16 is arranged on the bimetallic strip 8, when the temperature of smoke in a common smoke channel reaches a set warning temperature, soldering tin between the bimetallic strips is melted, one of the bimetallic strips falls off from the other bimetallic strip, the lock pressing plate 11 is separated from the constraint of the bimetallic strip, slides along the support shaft 7 under the action of the pressing plate pressure spring 9, the lock pressing plate 11 is pressed on the; at the moment, the locking plate 11 can be adapted to the flue non-return fire-proof valve with single valve plate or double valve plates as long as the outer diameter of the locking plate is adapted to the valve plates 4; the bracket can be of a single-leg structure or a double-leg structure. The valve plate pressing strips 14 corresponding to the locking and pressing discs 7 are hinged to one end, close to the valve plates 4, of the supporting shaft 7, so that 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 valves for forcibly closing the two valve plates, and the valve plate pressing strips can also be one branch of fire-proof valves for forcibly closing the single valve plate. One end of the locking pressure plate 11, which faces the pressure plate pressure spring 9, is provided with a sunken groove 17, the valve plate trim strip 14 is provided with a clamping hook 15 which is clamped in the sunken groove 17, after the locking pressure plate 11 is separated from the bimetallic strip 8 and pressed to the valve plate trim strip 14, the valve plate trim strip 14 is outwards opened and pressed on the valve plate 4, and the valve plate 4 is always in a closed state because wedge-shaped locking is formed between the valve plate trim strip 14 and the locking pressure plate 11 with the conical cavity 12.

Referring to fig. 12-14, an air outlet 5 is disposed on the end surface 3, a rotatable valve plate 4 that can only be opened in the air outlet direction is correspondingly disposed on the air outlet 5, and the end surface of the air outlet end and the upper end of the valve plate 4 are inclined toward the air inlet 2. As shown in fig. 11, the left side of the valve plate 4 is hinged to the end surface 3 through the valve seat 27, and at this time, the high-temperature closing device adopts a single-leg structure, and the legs are also installed on the end surface 3 on the left side of the air outlet 5; of course, the right side of the valve plate 4 may be hinged to the end surface 3 through the valve seat 27, and at this time, the legs of the high temperature closing device are also mounted on the end surface 3 on the right side of the air outlet 5. As shown in fig. 12, the upper side of the valve plate 4 is hinged to the end surface 3 through the valve seat 27, and at this time, the high-temperature closing device adopts a single-leg structure, and the legs thereof are also installed on the end surface 3 on the upper side of the air outlet 5; of course, it is also possible that the underside of the valve plate 4 is hinged to the end face 3 via the valve seat 27, in which case the legs of the high-temperature shut-off device are also mounted on the end face 3 on the underside of the air outlet 5. As shown in fig. 13, the upper valve plate of the air outlet 5 is divided into two large and small parts, wherein a smaller part of the valve plate is fixed on the upper part of the air outlet 5, and a larger part of the valve plate is hinged on the smaller part of the valve plate through the valve seat 27, i.e. the valve plate 4 is of an upward opening type, at this time, the high-temperature closing device adopts a single-leg structure, and the support leg thereof is also installed on the end surface 3 on the upper side of the air outlet 5; certainly, the valve plate 4 can also be left-open or right-open, and at this time, the support legs of the high-temperature closing device are also installed on the end surface 3 on the left side or the right side of the air outlet 5. Besides the structure, the structural form of the valve plate can also be a disc-shaped structure.

Referring to fig. 15, the flue duct check fire damper with another structure includes a cylindrical air inlet channel 1 formed by a housing, the air inlet channel may be a diameter-variable channel, the air inlet channel has an air inlet 2 and an air outlet (i.e. an air inlet channel and an air outlet channel) opposite to each other, and a mounting plate 26 is disposed on an outer wall of the housing, and for convenience of installation and fixation, the mounting plate 26 is generally square. A flue locking member 21 is provided on the mounting plate 26 to secure it to the flue to facilitate mounting and securing of the flue damper to the common flue. The inner side of the mounting disc 26 is provided with a guide cover 20 with consistent flue airflow direction, the cross section of the guide cover 20 is approximately U-shaped, the left side and the right side of the guide cover 20 are provided with hook grooves for mounting flue locking pieces 21, the mounting disc 26 is provided with locking bolt penetrating holes, and the locking bolt penetrating holes are arranged corresponding to the hook grooves. The oil smoke exhaust ventilator is characterized in that a valve plate 4 is arranged in an air inlet channel, the valve plate 4 is two oppositely arranged plates, the two valve plates 4 are generally symmetrically arranged along the longitudinal central line of the valve plate, the valve plate 4 has two working positions for closing and opening, a blocking body which enables the two valve plates to be opened only towards the air outlet direction is arranged at one end, close to an air inlet 2, in the air inlet channel, a valve plate rotating shaft 33 is arranged at each of the two longitudinal ends of the two valve plates 4, a valve seat 27 is correspondingly arranged in the air inlet channel, the valve seat 27 can be fixed on the inner wall of the oil smoke channel and can also be fixed on the blocking body, a valve plate opening limiting device is arranged on the valve seat. The blocking body can be an annular body arranged on the inner wall of the air inlet channel, and the blocking body can also be a boss arranged on the inner wall of the oil smoke channel or salient points arranged at annular intervals along the inner wall of the air inlet channel. A connecting strip 34 which is longitudinally arranged and divides the air inlet 2 into two parts is arranged in the air inlet channel and is close to the side of the air inlet 2, the connecting strip 34 and the blocking body can be integrally arranged, namely, the two longitudinal ends of the connecting strip 34 are respectively connected to the inner edge of the blocking body, or the connecting strip 34 and the blocking body are respectively connected to the inner wall of the oil smoke channel, and the connecting strip 34 and the blocking body are tightly attached together. The valve block rotating shaft is close to the connecting strip 34, and the valve block rotating shaft is located on the inner side of the side face where the connecting strip 34 faces the air outlet side, so that the two valve blocks 4 can only be opened towards the air outlet direction, firstly, the blocking body is arranged to enable the two valve blocks to only be opened towards the air outlet direction, secondly, the periphery of the valve blocks is convenient to be attached and relatively kept sealed, the valve block rotating shaft is close to the connecting strip 34, the periphery of the valve blocks is convenient to be attached to the blocking body and relatively kept sealed, and meanwhile, each connecting part is compact in structure and flexible to open and close. The valve plate 4 can also be arranged on the air inlet 2.

Fig. 16 shows a flue system with a flue check fire damper, which includes a common flue 31, a flue check fire damper installation port 32 is opened at a predetermined position of the common flue, the flue check fire damper installation port 32 is generally opened on a surface wall of the common flue close to one side of the range hood, the flue check fire damper installation port 32 is internally installed with the flue check fire damper, an installation plate 26 of the flue check fire damper is attached to the surface wall of the common flue, an air outlet of the flue check fire damper is located in the common flue, and an air inlet of the flue check fire damper is located outside the common flue. The flue check fire damper can be installed and fixed in the flue check fire damper installation opening 32 through the flue locking piece in the above embodiments, and can also be installed and fixed in the flue check fire damper installation opening 32 through any known manner.

The specific structure of the above embodiments is to illustrate the present invention, not to limit the present invention, and all modifications on the basis of the present invention shall fall into the protection scope of the present invention.

Claims

1. The utility model provides a flue is contrary fire prevention valve that ends, is including mounting disc (26) that have the through-hole, characterized by mounting disc (26) openly are equipped with inlet channel (1), are equipped with the air outlet in inlet channel (1), be equipped with rotatable valve block (4) that can only open to the air-out direction in inlet channel (1) or on mounting disc (26), mounting disc (26) back is equipped with kuppe (20), and mounting disc (26) back symmetry in two covers walls is equipped with fire prevention valve locking piece (21) about kuppe (20), be equipped with hook groove (22) that make fire prevention valve locking piece (21) stretch out about kuppe (20) on two covers walls.

2. The utility model provides a flue is contrary fire prevention valve that ends, is including mounting disc (26) that have the through-hole, characterized by mounting disc (26) openly are equipped with inlet channel (1), and mounting disc (26) back correspondence is equipped with air-out end terminal surface (3), is equipped with air outlet (5) on air-out end terminal surface (3), be equipped with rotatable valve block (4) that can only open to the air-out direction on air-out end terminal surface (3) or mounting disc (26), mounting disc (26) back is equipped with kuppe (20), and mounting disc (26) back symmetry in two covers walls about kuppe (20) is equipped with fire prevention valve locking piece (21), be equipped with hook groove (22) that make fire prevention valve locking piece (21) stretch out on two covers walls about kuppe (20).

3. The flue duct non-return fire prevention valve as claimed in claim 2, wherein the fire prevention valve locking member (21) comprises a limiting sleeve (24) fixedly mounted on the back surface of the mounting disc (26), a bolt (10) penetrating from the front surface of the mounting disc (26) is arranged in the limiting sleeve (24), a hook member (16) is screwed at the inner end of the bolt (10), the hook member (16) extends outwards from the hook groove (22), and the hook member (16) is tightly clamped on the inner wall of the flue gas duct through the bolt (10).

4. The flue duct non-return fire-proof valve as claimed in claim 2, characterized in that the hook groove (22) is in the shape of a corner, and has a straight groove section horizontally arranged and a vertical groove section vertically upwards arranged along the inner end of the straight groove section, the hood wall of the air guide hood (20) at the upper part of the vertical groove section has a concave part (23) relatively inwards concaved, the limit sleeve (24) is close to the straight groove section of the hook groove (22), and the upper end of the hook member (16) is attached to the concave part (23) when standing upright.

5. The flue duct non-return fire-proof valve as claimed in claim 4, wherein the straight groove section and the vertical groove section of the hook groove (22) are smoothly transited.

6. The flue duct non-return fire-proof valve as claimed in claim 4, characterized in that the outside of the left and right walls of the air guide sleeve (20) is provided with a hook latch (30) for making the upper end of the hook (16) stick to the concave part (23) when the hook is erected.

7. A flue duct non-return fire-proof valve as claimed in claim 3, characterized in that the outer end of the hook member (16) is provided with a raised hook head, and the raised hook head faces the mounting plate (26).

8. The utility model provides a flue non-return fire prevention valve, is including mounting disc (26) that have the through-hole, characterized by mounting disc (26) openly are equipped with inlet channel (1), are equipped with the air outlet in inlet channel (1), be equipped with rotatable valve block (4) that can only open to the air-out direction in inlet channel (1) or on mounting disc (26), be equipped with fire prevention valve locking piece (21) in mounting disc (26) back left and right sides symmetry.

9. The flue duct non-return fire-proof valve as claimed in claim 8, wherein a diversion cover (20) is provided on the back of the mounting plate (26), and the fire-proof valve locking piece (21) is arranged on the opposite outer sides of the left and right cover walls of the diversion cover (20).

10. The flue non-return fire damper as recited in claim 9, characterized in that the fire damper locking member (21) comprises a limiting sleeve (24) fixedly mounted on the back of the mounting plate (26), a bolt (10) penetrating from the front of the mounting plate (26) is arranged in the limiting sleeve (24), a hook member (16) is screwed to the inner end of the bolt (10), the hook member (16) extends outwards relatively, hook member lugs (28) extending outwards relatively are arranged on the left and right cover walls of the air guide sleeve (20) below the limiting sleeve (24) and the hook member (16), and the hook member (16) is pulled and clamped on the inner wall of the flue gas duct through the bolt (10).

11. The flue duct non-return fire-proof valve as claimed in claim 10, wherein the outside of the left and right walls of the air guide sleeve (20) is provided with hook locking tongues (30) for making the upper ends of the hook members (16) stick to the left and right walls of the air guide sleeve (20) when the hook members are erected.

12. The utility model provides a flue ends contrary fire prevention valve, is including mounting disc (26) that have the through-hole, characterized by mounting disc (26) openly are equipped with inlet channel (1), and mounting disc (26) back correspondence is equipped with air-out end terminal surface (3), is equipped with air outlet (5) on air-out end terminal surface (3), be equipped with rotatable valve block (4) that can only open to the air-out direction on air-out end terminal surface (3) or mounting disc (26), be equipped with fire prevention valve locking piece (21) in mounting disc (26) back left and right sides symmetry.

13. The flue duct non-return fire-proof valve as claimed in claim 12, wherein a diversion cover (20) is provided on the back of the mounting plate (26), and the fire-proof valve locking piece (21) is provided on the opposite outer sides of the left and right cover walls of the diversion cover (20).

14. The flue duct non-return fire prevention valve as claimed in claim 13, wherein the fire prevention valve locking member (21) comprises a limiting sleeve (24) fixedly mounted on the back surface of the mounting plate (26), a bolt (10) penetrating from the front surface of the mounting plate (26) is arranged in the limiting sleeve (24), a hook member (16) is screwed at the inner end of the bolt (10), the hook member (16) extends outwards relatively, hook member lugs (28) extending outwards relatively are arranged on the left and right cover walls of the air guide cover (20) below the limiting sleeve (24) and the hook member (16), and the hook member (16) is pulled and clamped on the inner wall of the flue gas duct through the bolt (10).

15. The flue duct non-return fire-proof valve as claimed in claim 14, wherein the outside of the left and right walls of the air guide sleeve (20) is provided with hook locking tongues (30) for making the upper ends of the hook members (16) stick to the left and right walls of the air guide sleeve (20) when the hook members are erected.

16. The flue duct non-return fire prevention valve as claimed in claims 2, 3, 4, 5, 6, 7, 12, 13, 14, 15 is characterized in that the air outlet end face (3) or the mounting plate (26) is provided with a high temperature closing device which can force the valve plate (4) to close towards the air inlet side under a set temperature and is provided with a locking mechanism, so that the valve plate (4) is always in a closed state.

17. The flue duct check fire valve according to claim 16, wherein the high temperature closing device with the locking mechanism comprises a support (6) installed on the outer end face of the end face (3) or the mounting plate (26), a support shaft (7) is arranged on the support (6), a locking pressure plate (11) is sleeved on the support shaft (7), a pressure plate pressure spring (9) is sleeved on the support shaft (7), a hot melt plate or a separated bimetallic strip (8) which extends to the 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) is interlocked with the hot melt plate or the bimetallic strip (8).

18. The flue check fire valve according to claim 17, characterized in that a valve plate pressing strip (14) is hinged to one end of the support shaft (7) close to the valve plate (4), a locking pressing plate (11) is arranged corresponding to the valve plate pressing strip (14), a sinking groove (17) is arranged at one end of the locking pressing plate (11) facing the pressing plate pressing spring (9), a clamping hook (15) clamped in the sinking groove (17) is arranged on the valve plate pressing strip (14), the locking pressing plate (11) is separated from the bimetallic strip (8) and presses against the valve plate pressing strip (14), and a mechanism for locking the valve plate pressing strip (14) and the locking pressing plate (11) is arranged between the valve plate pressing strip (14).

19. The flue duct check fire valve as claimed in claim 18, wherein the mutually locking mechanism is that the valve plate depression bar (14) is wedge-shaped at the hinged end after being opened, the locking plate (11) and the corresponding end of the valve plate depression bar (14) are provided with tapered cavities (12), and the valve plate depression bar (14) with the wedge-shaped hinged end and the valve plate depression bar (14) with the tapered cavities (12) form a wedge-shaped lock.

20. The flue duct check fire valve as claimed in claim 16, 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, the opening of the air outlet (5) is sleeved with a sealing ring (25), 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.

21. A flue duct non-return fire prevention valve according to claim 16, characterized in that the end face (3) is provided with an air outlet (5), the valve plate (4) is a single piece, and one side of the valve plate (4) is hinged to the end face (3).

22. The flue duct non-return fire prevention valve as claimed in claim 21, wherein the valve plate (4) is hinged to the end face (3) on the left or right side of the air outlet (5).

23. A flue duct non-return fire prevention valve according to claim 21, characterized in that the valve plate (4) is hinged on the end surface (3) on the upper side or the lower side of the air outlet (5).

24. The flue duct non-return fire-proof valve as claimed in claim 16, wherein the end face (3) is provided with an air outlet (5), the valve sheet on the air outlet (5) is divided into two parts, wherein the smaller part of the valve sheet is fixed on the air outlet (5), and the larger part of the valve sheet is hinged on the smaller part of the valve sheet.

25. A flue system, comprising:

the setting part of the public flue gas channel is provided with a flue check fire damper mounting opening;

the flue non-return fire-proof valve installation opening is internally provided with the flue non-return fire-proof valve as defined in any one of claims 1 to 24.