CN215635163U - Fireproof check valve with locking mechanism and flue system with fireproof check valve - Google Patents

Abstract

The utility model discloses a fireproof check valve with a locking mechanism and a flue system with the fireproof check valve, and the fireproof check valve comprises a fireproof check valve body, wherein the fireproof check valve body is provided with a flue gas channel, one end of the flue gas channel is provided with an air inlet, the other end of the flue gas channel is an air outlet end, a rotatable valve plate which can only be opened towards the air outlet direction is arranged in the flue gas channel or on the end surface of the air outlet end, a high-temperature closing device which can enable the valve plate to be forcibly closed towards the air inlet side at a set temperature and is provided with the locking mechanism is arranged on the fireproof check valve body, and a secondary locking mechanism of the high-temperature closing device is arranged at the set part of the fireproof check valve body or the high-temperature closing device. The utility model locks the movable parts of the high-temperature closing device of the fire-proof check valve for the second time, thereby further improving the safety of the fire-proof check valve.

Description

Fireproof check valve with locking mechanism and flue system with fireproof check valve

Technical Field

The utility model relates to a fire-proof check valve with a locking mechanism and a flue system with the same, which are used in a kitchen using a public flue.

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 fireproof check valve with a locking mechanism is generally arranged between an air outlet pipe orifice of a range hood and the public flue. 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 fireproof check valve with the locking mechanism 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 fireproof check valve with the locking mechanism 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 gas channel, and install the fireproof check valve with the locking mechanism on the air inlet of the flue gas channel through a screw, and the installation and fixation mode is easy to damage the ceramic tiles on the wall surface of the flue gas channel, and the ceramic tiles are cracked or cracked; in the mode, the installation and the replacement of the fireproof check valve with the locking mechanism 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 at the moment, if a valve plate in the fireproof check valve with the locking mechanism 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 fireproof check valve with the locking mechanism, so that the life safety of the user is threatened. The existing fire-proof check valve with a locking mechanism is provided with a high-temperature closing device which can forcibly close a valve plate to an air inlet side at a set temperature on the outer end face of an air outlet end, and when the temperature of smoke in a public smoke channel is in a very high emergency state and reaches a set warning temperature, the high-temperature closing device forcibly closes the valve plate in an open state. However, the valve plates are closed by the high-temperature closing device on the existing fireproof check valve with the locking mechanism through the force of the spring, when the high temperature continues for a certain time in the public flue gas channel, the spring loses efficacy due to the high temperature, the valve plates lose the restriction force of the spring and can be opened again, and high-temperature harmful gas can flow into the home of a user, so that the life safety of the resident is threatened.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a fire-proof check valve with a locking mechanism for secondarily locking a movable part of a high-temperature closing device of the fire-proof check valve, so that a valve plate of the fire-proof check valve is always in a closed state; the utility model also provides a flue system with the fireproof check valve.

In order to solve the technical problem, the fire-proof check valve comprises a fire-proof check valve body, wherein the fire-proof check valve body is provided with a smoke channel, one end of the smoke channel is provided with an air inlet, the other end of the smoke channel is an air outlet end, a rotatable valve plate which can only be opened towards the air outlet direction is arranged in the smoke channel or on the end surface of the air outlet end, a high-temperature closing device which can enable the valve plate to be forcibly closed towards the air inlet side at a set temperature and is provided with a locking mechanism is arranged on the fire-proof check valve body, and the fire-proof check valve is structurally characterized in that a secondary locking mechanism of the high-temperature closing device is arranged at a set part of the fire-proof check valve body or the high-temperature closing device.

The secondary locking mechanism of the high-temperature closing device comprises a fixed cylinder which can be installed on a set part of the fireproof check valve body or the high-temperature closing device, one end of the fixed cylinder is open, a compression spring is arranged at the inner end of the fixed cylinder, a locking pin is sleeved on the compression spring, and the outer end part of the locking pin extends out of the open end of the fixed cylinder.

The outer end of the locking pin is in a taper rod shape, the inner end of the locking pin is provided with a ring table which is matched with the shape of the inner cavity of the fixed cylinder, the inner end of the ring table is provided with a pin column, and the outer end of the compression spring is sleeved on the pin column.

The high-temperature closing device with the locking mechanism comprises a support installed on the outer end face of the end face, 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 on the support, 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 pressing strip.

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 high temperature closing device with locking mechanical system including installing the support on the outer terminal surface of terminal surface, 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 lock pressure disc that the valve block layering corresponds, suit pressure disk pressure spring on the back shaft, be equipped with on the support and stretch to the bimetallic strip that can melt under the settlement temperature of lock pressure disc or separation, interlocking between pressure strip lock pressure disc and the bimetallic strip is equipped with the valve block layering guide way of inside setting along the relative outside of lock pressure disc, valve block layering guide way inboard is equipped with the draw-in groove, be equipped with the trip of buckle in the draw-in groove on the valve block layering.

The high-temperature closing device with the locking mechanism comprises a bracket arranged on the outer end face of the end face, the outer side face of the bracket inclines downwards from top to bottom, a sliding groove arranged along the length direction is arranged at the lower section of the outer side surface of the bracket, a guide shaft parallel to the outer side surface is arranged at the inner side of the bracket, a spring is sleeved on the guide shaft, an opening and closing slide block which extends into the inner side of the bracket and can slide along a sliding groove (27) is arranged on the outer side surface of the bracket, the inner end of the opening and closing slide block is sleeved on a guide shaft, the back upper part of the inner side of the opening and closing slide block is contacted with a spring, a fuse wire which enables the opening and closing slide block to upwards compress the spring is arranged in the chute below the opening and closing slide block, after the fuse wire is fused, the opening and closing slide block slides downwards along the outer side surface of the support under the action of the spring and is gradually close to the right end surface of the end surface, and when the opening and closing slide block does not slide any more, the opening and closing slide block just compresses the two valve plates to completely shield the double-opening air outlet of the end surface.

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

After the structure is adopted, the high-temperature closing device which can forcibly close the valve plate to the air inlet side at the set temperature and is provided with the locking mechanism is arranged on the fireproof check valve body, the secondary locking mechanism of the high-temperature closing device is arranged at the set part of the fireproof check valve body or the high-temperature closing device, and secondary locking is carried out on a movable part of the high-temperature closing device of the fireproof check valve so as to improve the safety of the fireproof check valve body.

Drawings

The following detailed description of embodiments of the utility model 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 structural view of a secondary locking mechanism of the high temperature shutdown device of the present invention;

FIG. 4 is a schematic structural diagram of a high-temperature shutdown device according to an embodiment of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure A-A of FIG. 4;

FIG. 6 is a state diagram of the valve plate depression bar of FIG. 5 in an open state;

FIG. 7 is a schematic structural view of another embodiment of the high temperature shutdown device of the present invention;

FIG. 8 is a schematic view of the cross-sectional structure B-B of FIG. 7;

FIG. 9 is a schematic structural view of the lock pressure plate of FIG. 7;

FIG. 10 is a schematic structural view of another embodiment;

FIG. 11 is a schematic diagram of the structure of the right side view of FIG. 10;

FIG. 12 is a schematic diagram of a flue system with a fire check valve.

Detailed Description

Referring to the attached drawings, the fireproof check valve with the locking mechanism comprises a smoke channel formed by a shell 1, the smoke channel is cylindrical, one end of the smoke channel is provided with an air inlet 2, the other end of the smoke channel is an air outlet end, the air outlet end is provided with an end face 3 matched with the smoke channel, the end face 3 is provided with an air outlet 5, and the end face 3 is provided with a rotatable valve plate 4 which corresponds to the air outlet 5 and can only be opened towards the air outlet direction. In this embodiment, referring to fig. 1 and 2, an installation plate is disposed on an outer wall of a housing 1, the installation plate and a flue gas channel forming an air inlet 2 are integrally formed, and an end surface 3 is formed by stamping and then fixedly connected to the installation plate. 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 boss or the groove. The end face 3 is 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 as to enable the valve plate 4 to be always in a closed state, and a secondary locking mechanism of the high-temperature closing device is arranged at a set part of the fireproof check valve body 1 or the high-temperature closing device. 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.

Referring to fig. 3, the secondary locking mechanism of the high-temperature closing device includes a fixed cylinder 21 capable of being installed on a set position of the fire-proof check valve body 1 or the high-temperature closing device, one end of the fixed cylinder 21 is open, the end is an installation end of the secondary locking mechanism of the high-temperature closing device, a compression spring 25 is arranged at the inner end of the fixed cylinder 21, a locking pin 22 is sleeved on the compression spring 25, the outer end portion of the locking pin 22 extends out of the open end of the fixed cylinder 21, the outer end of the locking pin 22 is in a tapered rod shape, a loop platform 23 adapted to the shape of the inner cavity of the fixed cylinder 21 is arranged at the inner end of the locking pin 22, a pin 24 is arranged at the inner end of the loop platform 23, and the outer end of the compression spring 25 is sleeved on the pin 24. The outer diameter of the ring platform 23 is larger than that of the locking pin 22, and the outer diameter of the pin column 24 is smaller than that of the ring platform 23. When the secondary locking mechanism of the high-temperature closing device works, the outer end part of the locking pin 22 can be pressed on the movable locking component of the high-temperature closing device.

Referring to fig. 4 to 6, a specific structure of the high temperature closing apparatus having the locking mechanism is: 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 locking 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 bracket 6 is provided with a bimetallic strip 8 which extends to the lock pressure plate 11 and can be separated at a set temperature, the bimetallic strip 8 is formed by welding two metal strips through welding materials which can be melted at the set temperature, or a bolt or a card made of hot melting materials which can be melted at the set temperature is inserted together, and the bimetallic strip 8 can also be replaced by the hot melting strip which can be melted at the 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 valve plate trim strip 14 with the hinged end in the wedge shape and the valve plate trim strip 14 with the conical cavities 12 form wedge-shaped locking. The valve plate pressing strips 14 are crank arm-shaped, the locking plate 11 is approximately cylindrical, the locking plates 11 are symmetrically arranged on the outer sides of the locking plates 11, when the two valve plate pressing strips 14 are in a locking state, the hooks 15 (located on the opposite inner sides of the valve plate pressing strips 14 at this time) arranged on the valve plate pressing strips 14 are buckled in the sinking grooves 17 of the locking plates 11, and one crank arm of each of the two valve plate pressing strips 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 conical cavity 12. The support legs of the support 6 are provided with mounting holes of a secondary locking mechanism of the high-temperature closing device, the mounting ends of the secondary locking mechanism of the high-temperature closing device are mounted corresponding to the mounting holes, the outer end part of a locking pin 22 of the secondary locking mechanism of the high-temperature closing device penetrates through the mounting holes to extend to the valve plate pressing strip 14 and abut against a vertical crank arm of the valve plate pressing strip 14 (in a state shown in figure 5), when the high-temperature closing device works, namely the two valve plate pressing strips 14 are outwards opened and pressed on the two valve plates 4, the outer end part of the locking pin 22 can be pressed on the upper part of the valve plate pressing strip 14, and secondary locking is carried out on movable parts of the high-temperature closing device. The fire-proof check valve with the locking mechanism shown in fig. 1 and 4 is only provided with the secondary locking mechanism of the high-temperature closing device on one of the support legs of the bracket 6, and in actual use, each support leg can be provided with the secondary locking mechanism of the high-temperature closing device, and of course, the secondary locking mechanism of the high-temperature closing device can be installed on the fire-proof check valve body 1.

In the foregoing embodiment, the fire-proof check valve with the locking mechanism has the air outlet end face adapted to the smoke 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 closing device for forcibly closing the valve plate is a double-leg structure shown in fig. 4, and in practical application, because the structure of the fireproof check valve with the locking mechanism has diversity, such as: the valve plate is arranged in a smoke channel of the fire-proof valve, 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 fire-proof check valve with the locking mechanism in different structures, the high-temperature closing device for forcibly closing the valve plates can also adopt a single-leg structure, namely, the left leg or the right leg of the bracket 6 in the figure 4 is removed, only one leg is reserved, and the high-temperature closing device is convenient to be installed at the corresponding part of the fire-proof check valve with the locking mechanism, for example, the high-temperature closing device is installed on the end face of the air outlet end through the support leg with the end part folded outwards, or is installed on the installation disc of the fire-proof check valve with the locking mechanism and is installed on the side wall of the shell of the fire-proof check valve with the locking mechanism. 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 valve plate 4, and the valve plate 4 is in a closing state; at the moment, the locking pressure plate 11 can be adapted to the fireproof check valve with the locking mechanism of the single valve plate or the double valve plates as long as the outer diameter of the locking pressure 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. 7 to 9, another specific structure of the high temperature closing apparatus having the locking mechanism is: including a bracket 6 mounted on the outer end face of the end face 3. referring to fig. 7, the bracket 6 has a two-leg structure, and it is also possible to remove the left leg or the right leg of the bracket 6 and only leave one leg. The support 6 is provided with a support shaft 7, one end of the support shaft 7, which is 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, the support shaft 7 is sleeved with a locking pressing plate 11 corresponding to the valve plate pressing strip 14, the support shaft 7 is sleeved with a pressing plate pressure spring 9, the support 6 is provided with a bimetallic strip 8 which extends to the locking pressing plate 11 and can be separated at a set temperature, and the bimetallic strip 8 can be replaced by a hot melt strip which can be melted at the 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. The valve plate pressing strip guide groove 19 is formed along the opposite outer side of the locking pressing disc 11, the valve plate pressing strip guide groove 19 is internally provided with a clamping groove 18, and the valve plate pressing 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. The whole locking pressing plate 11 is roughly in a strip shape, a hole sleeved with the supporting shaft 7 is formed in the middle of the strip-shaped locking pressing plate 11, valve plate pressing strip guide grooves 19 which are arranged inwards are formed in two ends of the strip-shaped locking pressing plate 11 in the length direction, clamping grooves 18 are formed in the inner ends of the two valve plate pressing strip guide grooves 19, clamping claws 16 are arranged on one side of the strip-shaped locking pressing plate 11 in the width direction, and the two ends of the locking pressing plate 11 in the length direction are bent towards the same side along the joint of the valve plate pressing strip 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 (located 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 locking plate 11, the two valve plate pressing strips 14 are respectively located in the guide grooves 19, and the clamping grooves 18 and the guide grooves 19 are separated by partition bars; 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 a set warning temperature, 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 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 parting strip slides along the sliding groove, the 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 state because the valve plate pressing strips 14 are in a locking state. The support legs of the support 6 are provided with mounting holes of a secondary locking mechanism of the high-temperature closing device, the mounting ends of the secondary locking mechanism of the high-temperature closing device are mounted corresponding to the mounting holes, the outer end parts of locking pins 22 of the secondary locking mechanism of the high-temperature closing device penetrate through the mounting holes and extend to the valve plate pressing strips 14 and abut against the valve plate pressing strips 14 (above the locking plate 11 in the state shown in fig. 8), when the high-temperature closing device works, namely the two valve plate pressing strips 14 are outwards opened and pressed on the two valve plates 4, the outer end parts of the locking pins 22 can be pressed on the upper parts of the valve plate pressing strips 14, and secondary locking is carried out on movable parts of the high-temperature closing device.

The fire-proof check valve with the locking mechanism shown in fig. 10 and 11 is a large-displacement flow-guiding fire-proof check valve, and comprises a smoke channel formed by a shell 1, wherein the smoke channel is cylindrical, one end of the smoke channel is provided with an air inlet 2, the other end of the smoke channel is an air outlet end, the air outlet end is provided with an end face 3 matched with the smoke channel, the end face 3 is provided with an air outlet 5, and the end face 3 is provided with a rotatable valve plate 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. Be equipped with two air outlets 5 on the terminal surface of air-out end, be provided with on the outer terminal surface of air-out end with air outlet 5 correspond, can only be to two rotatable valve blocks 4 that the air-out direction was opened, two air outlets 5 bilateral symmetry set up on the terminal surface of air-out end, the terminal surface of air-out end and two valve block 4 upper ends are to the 2 direction slopes of air intake, the central line of air intake 2 and the central line of two air outlets 5 of opening are the acute angle, the air-out area of two air outlets 5 is greater than the area of air intake 2. The end face 3 is 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 as to enable the valve plate 4 to be always in a closed state, and a set part of the high-temperature closing device is provided with a secondary locking mechanism of the high-temperature closing device. The high-temperature closing device with the locking mechanism comprises a support 6 arranged on the outer end face of an end face 3, the support 6 is positioned between two valve plates 4, the support 6 is in a strip shape, the support 6 is arranged on the outer end face of the end face 3 through an upper supporting leg and a lower supporting leg, the outer side face of the support 6 inclines towards the lower part of the end face 3 from top to bottom, namely, the outer side face of the support 6 is gradually close to the right side face of the end face 3 from top to bottom, a sliding groove 27 is arranged on the lower section of the outer side face of the support 6, the sliding groove 27 is arranged along the length direction of the outer side face of the support 6, a guide shaft 26 parallel to the outer side face of the support 6 is arranged on the inner side of the support 6, two ends of the guide shaft 26 are correspondingly fixed on the upper supporting leg and the lower supporting leg of the support 6, a spring 30 is sleeved on the guide shaft 26, an opening and closing slide block 29 which extends into the inner side of the support 6 and can slide along the sliding groove 27 is arranged on the guide shaft 26, the inside back of opening and close slider 29 is to the top and the contact of spring 30, is equipped with the fuse-link 28 that makes the slider 29 of opening and close upwards compression spring 30 in opening and close the spout 27 of slider 29 below, when the temperature of oil smoke gas passageway exceeded fuse-link 28 fusing temperature, the fuse-link 28 fusing, open and close slider 29 and slide down along the support 6 lateral surface and be close to terminal surface 3 right-hand member face gradually under the effect of spring 30, when opening and close slider 29 and no longer slide, open and close slider 29 and compress tightly two valve plates 4 just in order to shelter from the two air outlets 5 that open of terminal surface 3 completely.

Referring to fig. 12, the flue system with the fire-proof check valve includes a public flue gas duct 31, a fire-proof valve installation port 32 is opened at a set position of the public flue gas duct, the fire-proof valve installation port 32 is generally opened on a surface wall of the public flue gas duct near one side of the range hood, the fire-proof check valve is installed in the fire-proof valve installation port 32, an installation plate of the fire-proof check valve is attached to the surface wall of the public flue gas duct, an air outlet of the fire-proof check valve is located in the public flue gas duct, and an air inlet of the fire-proof check valve is located outside the public flue gas duct. The fire protection check valve may be installed and fixed in the fire protection valve installation opening 32 in any known manner.

The specific structure of the above embodiment is to illustrate the present invention, but not to limit the present invention, the utility model is directed to a fire-proof check valve with a high-temperature closing device, which locks the movable part of the high-temperature closing device of the fire-proof check valve for the second time to improve the safety of the fire-proof check valve, and the secondary locking mechanism of the high-temperature closing device is arranged at the setting part of the fire-proof check valve body or the high-temperature closing device.

Claims (9)

1. The utility model provides a fire prevention check valve with locking mechanical system, includes fire prevention check valve body (1), fire prevention check valve body (1) has the flue gas passageway, and flue gas passageway one end has air intake (2), and the relative other end is the air-out end, be equipped with rotatable valve block (4) that only can open to the air-out direction in the flue gas passageway or on the terminal surface of air-out end, be provided with on fire prevention check valve body (1) and enable valve block (4) to the air intake side force under the settlement temperature and close, have locking mechanical system's high temperature closing device, characterized by fire prevention check valve body (1) or high temperature closing device's settlement position is equipped with high temperature closing device secondary locking mechanism.

2. The fire-proof check valve with the locking mechanism according to claim 1, wherein the secondary locking mechanism of the high-temperature closing device comprises a fixed cylinder (21) which can be installed on the body (1) of the fire-proof check valve or the set part of the high-temperature closing device, one end of the fixed cylinder (21) is open, a compression spring (25) is arranged at the inner end of the fixed cylinder (21), a locking pin (22) is sleeved on the compression spring (25), and the outer end part of the locking pin (22) extends out of the open end of the fixed cylinder (21).

3. The fire-proof check valve with locking mechanism according to claim 2, characterized in that the outer end of the locking pin (22) is in the shape of a taper rod, the inner end of the locking pin (22) is provided with a ring platform (23) which is adapted to the shape of the inner cavity of the fixed cylinder (21), the inner end of the ring platform (23) is provided with a pin column (24), and the outer end of the compression spring (25) is sleeved on the pin column (24).

4. The fire-proof check valve with locking mechanism according to any of claims 1-3, characterized in that said high temperature closing device with locking mechanism comprises a support (6) installed on the outer end face of the end face (3), a support shaft (7) is installed 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 plate (8) which can be melted at a set temperature and extends to the locking pressure plate (11) is installed on the support (6), and said pressure strip locking pressure plate (11) and the hot-melt plate or bimetallic plate (8) are interlocked.

5. The fire-proof check valve with the locking mechanism according to claim 4, characterized in that one end of the support shaft (7) close to the valve plate (4) is hinged with a valve plate pressing strip (14), the locking pressing plate (11) is arranged corresponding to the valve plate pressing strip (14), one end of the locking pressing plate (11) facing the pressing plate pressing spring (9) is provided with a sinking groove (17), the valve plate pressing strip (14) is provided with a hook (15) buckled in the sinking groove (17), after the locking pressing plate (11) is separated from the bimetallic strip (8) and pressed towards the valve plate pressing strip (14), the locking pressing plate (11) and the valve plate pressing strip (14) have a mechanism for locking each other.

6. The fire-proof check valve with locking mechanism according to claim 5, characterized in that the locking mechanism is a wedge shape at the hinged end of the valve plate pressing strip (14) after the valve plate pressing strip (14) is opened, the locking plate (11) and the corresponding end of the valve plate pressing strip (14) are provided with tapered cavities (12), and the valve plate pressing strip (14) with the hinged end in the wedge shape and the valve plate pressing strip (14) with the tapered cavities (12) form a wedge-shaped locking.

7. The fire-proof check valve with locking mechanism according to any of claims 1-3, characterized in that the high temperature closing device with locking mechanism comprises a support (6) installed on the outer end face of the end face (3), a support shaft (7) is installed 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 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 hot melting plate or a separated bimetallic strip (8) which can be melted at a set temperature and extends to the locking pressing plate (11) is arranged on the support (6), the pressing strip locking pressing plate (11) and the bimetallic strip (8) are interlocked, an inwardly arranged valve plate pressing strip guiding groove (19) is arranged along the opposite outer side of the locking pressing plate (11), a clamping groove (18) is formed in the inner side of the valve plate pressing strip guide groove (19), and a clamping hook (15) buckled in the clamping groove (18) is arranged on the valve plate pressing strip (14).

8. The fire-proof check valve with the locking mechanism according to any one of claims 1 to 3, characterized in that the high-temperature closing device with the locking mechanism comprises a bracket (6) arranged on the outer end surface of the end surface (3), the outer side surface of the bracket 6 is inclined from top to bottom to the lower part of the end surface (3), a sliding groove (27) arranged along the length direction of the bracket is arranged at the lower section of the outer side surface of the bracket (6), a guide shaft (26) parallel to the outer side surface of the bracket (6) is arranged at the inner side of the bracket (6), a spring (30) is sleeved on the guide shaft (26), an opening and closing slide block (29) extending into the inner side of the bracket (6) and capable of sliding along the sliding groove (27) is arranged on the outer side surface of the bracket (6), the inner end of the opening and closing slide block (29) is sleeved on the guide shaft (26), the backward upper part of the inner side of the opening and closing slide block (29) is contacted with the spring (30), and a fuse wire(s) enabling the opening and closing slide block (29) to compress the spring (30) upwards is arranged in the sliding groove (27) below the opening and closing slide block (29) ((a piece (29) ((a) is) 28) After the fuse wire (28) is fused, the opening and closing slide block (29) slides downwards along the outer side surface of the support (6) under the action of the spring (30) and gradually approaches to the right end surface of the end surface (3), and when the opening and closing slide block (29) does not slide any more, the opening and closing slide block (29) just compresses the two valve plates (4) to completely shield the double-opening air outlet (5) of the end surface (3).

9. A flue system, comprising:

the public flue gas channel is provided with a fire damper mounting port at a set part;

a fire-proof check valve as claimed in any one of claims 1 to 8 is installed in the fire-proof valve installation opening.

Images