CN217422292U - Check valve and flue structure - Google Patents

Abstract

The utility model provides a check valve and flue structure, relating to the technical field of kitchen appliances, wherein the check valve comprises a valve body, a mounting seat and a non-return component; the mounting seat is connected to the outlet end of the valve body, a smoke exhaust hole communicated with a valve hole of the valve body is formed in the mounting seat, a sealing surface is formed on the circumferential edge of one end, away from the valve body, of the smoke exhaust hole, and a guide flanging is arranged at one end, close to the smoke exhaust hole, of the sealing surface in the circumferential direction of the smoke exhaust hole; the non-return assembly comprises a non-return sheet, the non-return sheet is movably connected to one side, far away from the valve body, of the mounting seat, the non-return sheet can move relative to the mounting seat to seal or open the smoke exhaust hole, a sealing part is arranged on the circumferential edge of the non-return sheet, a concave part is arranged on the circumferential inner side of the sealing part of the non-return sheet, when the non-return sheet seals the smoke exhaust hole, the sealing part is abutted against the sealing surface, and the guide flanging is inserted into the concave part; the check sheet can be smoothly guided into the sealing surface, the flow path of the air flow is prolonged, and the sealing effect of the check valve is ensured.

Description

Check valve and flue structure

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a check valve and flue structure are related to.

Background

The range hood is also called as a range hood or a range hood, and is a common device for processing oil smoke in a kitchen. The existing range hood forms pressure through a fan, oil smoke in a kitchen is sucked and exhausted to a flue and then is exhausted to the outside, and in order to avoid backflow of the smoke, the flue is connected with a smoke exhaust pipe through a check valve. When the range hood is in a non-use state, the check sheet of the check valve seals the valve body to prevent oil smoke in the flue or external smoke from flowing back to the room through the check valve; when the range hood is in a use state, the check sheet overturns to open the valve body under the action of pressure generated by the fan, and the range hood is communicated with the flue to suck and exhaust oil smoke. When the check sheet overturns to open or close the valve body, the check sheet often has a little dislocation, which causes the check sheet not to seal the valve body well, so that the check valve has poor sealing effect, and then the possibility of smoke backflow exists, and the environment in a kitchen is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a check valve and flue structure to solve the check piece that prior art exists and appear a little dislocation easily at the upset in-process, lead to the not tight technical problem of check valve seal.

The utility model provides a check valve, which comprises a valve body, a mounting seat and a non-return component;

the mounting seat is connected to the outlet end of the valve body, a smoke exhaust hole communicated with the valve hole of the valve body is formed in the mounting seat, a sealing surface is formed on the circumferential edge of one side, away from the valve body, of the smoke exhaust hole of the mounting seat, a guide flanging is arranged at one end, close to the smoke exhaust hole, of the sealing surface in a circumferential direction of the smoke exhaust hole, and the guide flanging extends away from the valve body;

the non-return assembly comprises a non-return sheet, the non-return sheet is movably connected to one side of the mounting seat far away from the valve body, the non-return sheet can be opposite to the mounting seat and can move to seal or open the smoke exhaust hole, the circumferential edge of the non-return sheet is provided with a sealing part, the non-return sheet is arranged on the inner side of the circumferential edge of the sealing part and is provided with a concave part, the non-return sheet is sealed when the smoke exhaust hole is formed, the sealing part is abutted to the sealing surface, and the guide flanging is inserted into the concave part.

Further, the guide flange is gradually retracted from the end close to the sealing surface to the end far away from the sealing surface.

Furthermore, one end, close to the smoke exhaust hole, of the sealing surface is turned over to the side, away from the valve body, to form the guide flanging.

Further, the outlet end of the smoke exhaust hole is arranged upwards and upwards relative to the valve hole surface.

Furthermore, the included angle between the plane where the outlet end of the smoke exhaust hole is located and the axis of the valve hole is larger than or equal to 80 degrees and smaller than 90 degrees.

Further, the mounting seat comprises a circumferential plate and an end plate, the circumferential plate is connected to the circumferential edge of the end plate, and the smoke exhaust hole and the sealing surface are arranged on the end plate;

the valve comprises a valve body, a valve hole, a valve body, a connecting end part and a circumferential connecting part, wherein the outlet end of the valve body is provided with the connecting end part and the circumferential connecting part, the connecting end part is wound on the circumferential direction of the valve hole of the valve body and is perpendicular to the axis of the valve body, and the circumferential connecting part is connected to the circumferential edge of the connecting end part;

the circumference connecting portion is located one side that the import of valve body was kept away from to coupling end portion, the circumference board is located one side that the valve body was kept away from to the end plate, the end plate with coupling end portion fixed connection, the circumference board cover is established in the circumference connecting portion.

Further, one end, far away from the connecting end, of the circumferential connecting portion is connected with a flange used for being connected with a flue.

Furthermore, a stopping edge for preventing the fixing glue from overflowing is arranged on the circumferential edge of one side, facing the flue, of the flange;

and/or;

and a plurality of flange mounting holes are formed in the flange along the circumferential direction of the flange.

Furthermore, one end, far away from the end plate, of the circumferential plate protrudes out of one side, far away from the valve body, of the flange.

Further, the spacing distance between one end, far away from the valve body, of the circumferential plate and the flange along the axial direction of the valve hole is not less than 5 millimeters.

Furthermore, the circumference edge of end plate towards one side at circumference board place is provided with the connection turn-ups, the circumference board includes the polylith connecting plate, and the polylith connecting plate is followed the circumference of end plate sets gradually, and passes through fixed plate welded connection between the adjacent connecting plate, the attached two of connecting this fixed plate is connected respectively in the both ends of fixed plate the outside of connecting plate, the polylith the connecting plate all with correspond the position connect the turn-ups and connect.

Furthermore, the end plate is connected with the connecting end part through a first cylindrical fastener, a first counter bore is formed in the end plate, a second counter bore is formed in the connecting end part, and the first cylindrical fastener penetrates through the first counter bore and the second counter bore;

and/or;

and sealing silica gel is filled between the end plate and the connecting end part.

Further, the check valve still includes the preinstallation spare, the preinstallation spare sets up on the mount pad and/or the valve body, the preinstallation spare can be accomodate in the inboard of circumference connecting portion, and the preinstallation spare can expand to extend to the outside of circumference connecting portion.

Furthermore, the pre-mounting part comprises a pre-tightening torsion spring, a pre-tightening fixed end of the pre-tightening torsion spring is fixed between the circumferential plate and the circumferential connecting part, and a free end of the pre-tightening torsion spring can rotate in the radial direction of the valve body.

Furthermore, the side surface of the circumferential plate facing the circumferential connecting part is provided with a mounting groove, and the pre-tightening fixed end of the pre-tightening torsion spring is fixed in the mounting groove.

Furthermore, the number of the pre-tightening torsion springs is multiple, and the pre-tightening torsion springs are arranged along the circumferential direction of the circumferential plate at intervals.

Furthermore, the pre-tightening fixed end of the pre-tightening torsion spring is fixedly connected with the circumferential plate and the circumferential connecting part through a second cylindrical fastener.

Furthermore, the second cylindrical fastener is a countersunk screw, a first fixing hole is formed in the circumferential plate, a third counter bore is formed in the circumferential connecting portion, and the countersunk screw sequentially penetrates through the first fixing hole, the pre-tightening fixing end of the pre-tightening torsion spring and the third counter bore.

Further, the valve body is sequentially provided with a plurality of annular fixing surfaces, and the outer diameter of one of the two adjacent annular fixing surfaces is larger than that of the other annular fixing surface.

Furthermore, a second fixing hole is formed in any one of the annular fixing surfaces, and the second fixing hole is used for realizing connection of the valve body and the smoke exhaust pipe.

Furthermore, an indicating piece for prompting the installation direction of the valve body is arranged on the valve body;

and/or;

and the valve body is provided with a nameplate part engraved with a nameplate.

Furthermore, the check piece comprises a valve plate body, a sealing gasket is arranged on the circumferential edge of the valve plate body, and the sealing gasket is used for being abutted to the sealing part.

Further, the valve plate body is a galvanized plate;

and/or;

the valve plate body is sequentially provided with a plurality of annular imprints at intervals from the circumferential edge to the center;

and/or;

and the side surface of the sealing gasket facing the sealing surface is provided with an elastic skirt.

Furthermore, the non-return assembly further comprises a rotating shaft and an elastic control piece, the non-return sheet is hinged to the mounting seat through the rotating shaft, one end of the elastic control piece is connected with the mounting seat, the other end of the elastic control piece acts on the non-return sheet, and the elastic control piece can enable the non-return sheet to have the tendency of sealing the smoke exhaust hole.

Furthermore, the elastic control part comprises a non-return torsion spring, the non-return torsion spring is sleeved on the rotating shaft, the fixed end of the non-return torsion spring is connected with the mounting seat, and the free end of the non-return torsion spring is abutted against the side face, deviating from the smoke exhaust hole, of the non-return sheet.

Furthermore, a pressure groove is formed in the mounting seat, and the fixed end of the non-return torsion spring is inserted into the pressure groove;

and/or;

the non-return torsion spring is arranged at the middle position of the rotating shaft in the axial direction.

Further, the check valve also comprises a fireproof assembly, the fireproof assembly is installed on the installation seat, and the fireproof assembly comprises a temperature control element and a driving mechanism;

when the temperature is lower than the preset temperature, the temperature control piece acts on the driving mechanism to enable the driving mechanism to avoid the non-return sheet, when the temperature exceeds the preset temperature, the temperature control piece releases the driving mechanism, and the driving mechanism acts on the non-return sheet to drive the non-return sheet to seal the smoke exhaust hole.

Further, actuating mechanism includes elasticity fire prevention driving piece and fire prevention push rod, fire prevention push rod is used for with the backstop piece butt, elasticity fire prevention driving piece sets up fire prevention push rod with between the mount pad, elasticity fire prevention driving piece makes fire prevention push rod has the drive backstop piece seals the trend in smoke vent, fire prevention push rod with the temperature control spare is connected.

Further, the temperature control part comprises a first fixing sheet, the first fixing sheet is fixed on the mounting seat through a welding part, and the welding part is separated from the first fixing sheet when the temperature reaches a preset temperature.

Further, the welding part comprises a second fixing piece, the second fixing piece is fixedly connected with the mounting seat, and the first fixing piece and the second fixing piece are welded through a welding material.

Furthermore, the check valve also comprises a third cylindrical fastener, a fourth fixing hole is formed in the second fixing sheet, and a connecting inserting edge is formed in the second fixing sheet;

the mounting seat is provided with a fifth fixing hole and a connecting slot, the connecting inserting edge is inserted into the connecting slot, and a third columnar fastener penetrates through the fourth fixing hole and the fifth fixing hole to fix the second fixing piece on the mounting seat.

Furthermore, the check valve comprises a fixed frame, and the check sheet is hinged on the fixed frame through a rotating shaft;

the fireproof push rod comprises an installation rod and a main body rod, the main body rod is fixedly connected with the installation rod and arranged in an included angle mode, the installation rod is rotatably connected to the fixed frame, and the main body rod is connected with the temperature control piece;

the elastic fireproof driving piece is arranged between the fixed frame and the mounting rod or the main body rod.

Furthermore, the fixed frame comprises two brackets which are arranged at one side of the smoke exhaust hole at intervals, and two ends of the rotating shaft are respectively connected with the two brackets;

the both ends of main part pole all are connected with the installation pole, every the installation pole is kept away from the one end of main part pole is connected with the rotation portion, the rotation portion with main part pole parallel arrangement, two the rotation portion respectively with two the support rotates and is connected.

Furthermore, every the support includes first mounting panel, two first mounting panel sets up relatively, be provided with first locating part on the first mounting panel, every be provided with the second locating part on the rotation portion, the fire prevention push rod rotates to making the contrary piece seals when the hole of discharging fume, first locating part and the end that corresponds the second locating part cooperation locking.

Furthermore, be provided with first mounting hole on the first mounting panel, the portion of rotating wears to establish in the first mounting hole, and two the one end that the portion of rotating kept away from each other is worn out the correspondence respectively all be provided with behind the first mounting hole the second locating part, two one side that the first mounting panel kept away from each other is provided with respectively first locating part.

Furthermore, a second mounting hole is formed in the second limiting piece, and the rotating part penetrates through the second mounting hole and then is connected with a bolt;

and/or;

the second locating part is provided with the direction inclined plane, first locating part includes the elasticity buckle, the direction inclined plane slide and walk around the elasticity buckle when the second locating part with fire prevention push rod rotates in step, so that first locating part with the elasticity buckle butt is with the locking fire prevention push rod.

Further, elasticity fire prevention driving piece includes two fire prevention torsional springs, two the fire prevention torsional spring overlaps respectively and establishes two on the rotation portion, the stiff end of fire prevention torsional spring with leg joint, the free end of fire prevention torsional spring with correspond the end the installation pole is connected.

Furthermore, the rotating parts are connected to the end parts, far away from the main body rod, of the mounting rods, the two rotating parts extend away from the main body rod, and an included angle between each rotating part and the mounting rod is an acute angle;

and/or;

one side of the two first mounting plates, which is close to each other, is connected with a limiting plate, the limiting plate and the first mounting plates form a clamping angle, and the fixed end of the fireproof torsion spring is abutted to the inside of the clamping angle.

Furthermore, the bracket also comprises a second mounting plate and a third mounting plate, the third mounting plate of the same bracket is connected between the second mounting plate and the first mounting plate, the second mounting plates of the two brackets are oppositely arranged, and the rotating shaft is arranged on the two second mounting plates;

the third mounting plate is fixedly connected with the mounting seat.

Furthermore, one side of the check sheet, which is far away from the smoke exhaust hole, is provided with a pressing bag.

Furthermore, the circumferential plate of the mounting seat extends inwards to form mounting flanges, at least two mounting flanges are arranged at intervals in the direction perpendicular to the end plate, and third mounting holes are formed in the mounting flanges;

the fire prevention push rod includes main part pole and installation pole, the main part pole with the installation pole is the contained angle setting, the rotatable wearing to establish of installation pole is a plurality of in the turn-ups third mounting hole of installation, elasticity fire prevention driving piece includes the fire prevention torsional spring, the fire prevention torsional spring cover is established on the installation pole between two adjacent installation turn-ups, the stiff end butt of fire prevention torsional spring is in on the circumference board, the free end of fire prevention torsional spring with the main part pole is connected, the main part pole with the temperature control piece is connected, just the release of temperature control piece during the main part pole, the main part pole is kept away from the one end of installation pole can with the backstop butt.

Furthermore, a stop piece is arranged on the installation flanging, and the main body rod is abutted against the stop piece when the non-return sheet seals the smoke exhaust hole.

Furthermore, two ends of the main rod are bent towards the same side to form bent portions, one ends of the two bent portions, which are far away from the main rod, are mutually close to each other to form bent extension portions, the extension portions are rotatably connected with the fixing frame, the bent portions serve as the mounting rods, and the extension portions serve as the rotating shafts;

the elasticity fire prevention driving piece includes two fire prevention torsional springs, two the fire prevention torsional spring overlaps respectively and establishes two on the extension, the stiff end of fire prevention torsional spring with the mount is connected, the free end of fire prevention torsional spring with the kink or main part bar connection.

Furthermore, the fixing frame comprises a non-return piece mounting frame, the non-return piece mounting frame comprises a non-return connecting plate, and two first non-return fixing plates and two second non-return fixing plates which are arranged on the non-return connecting plate, the two second non-return fixing plates are arranged at intervals relatively, the two first non-return fixing plates are arranged at intervals relatively, and the two second non-return fixing plates are arranged between the two first non-return fixing plates;

the two first non-return fixing plates are provided with fireproof push rod fixing holes, and the two extending parts penetrate through the fireproof push rod fixing holes from the sides, far away from each other, of the two first non-return fixing plates and are connected with the non-return plates;

and the two second non-return fixing plates are fixedly provided with non-return torsion springs, and the free ends of the non-return torsion springs are abutted against one sides of the non-return sheets far away from the smoke exhaust hole.

Further, the lower end of the backstop sheet is hinged with the mounting seat.

The embodiment of the utility model provides a flue structure, include the embodiment of the utility model provides a check valve.

The utility model provides a check valve, which comprises a valve body, a mounting seat and a non-return component; the mounting seat is connected to the outlet end of the valve body, a smoke exhaust hole communicated with a valve hole of the valve body is formed in the mounting seat, a sealing surface is formed on the circumferential edge of one end, away from the valve body, of the smoke exhaust hole, and a guide flanging is arranged at one end, close to the smoke exhaust hole, of the sealing surface in the circumferential direction of the smoke exhaust hole; the non-return assembly comprises a non-return sheet, the non-return sheet is movably connected to one side, far away from the valve body, of the mounting seat, the non-return sheet can move relative to the mounting seat to seal or open the smoke exhaust hole, a sealing portion is arranged on the circumferential edge of the non-return sheet, a concave portion is arranged on the inner side of the non-return sheet in the circumferential direction of the sealing portion, when the non-return sheet seals the smoke exhaust hole, the sealing portion is abutted to the sealing surface, and the guide flanging is inserted into the concave portion. The utility model discloses the check valve passes through the mount pad and connects valve body and contrary piece, and the cooperation of the direction turn-ups that sets up on the mount pad and the depressed part that ends contrary piece can the position of guiding orientation and ends contrary piece, even end contrary piece movable seal or open the in-process in smoke vent and appear a little dislocation, under the cooperation of direction turn-ups and depressed part, end contrary piece also can be smooth leading-in to sealed face on, guaranteed the sealed effect that ends contrary piece. And the guide flange is arranged on the inner side of the sealing surface, when the non-return sheet seals the smoke exhaust hole, the airflow needs to pass through the sealing surface and then move to the guide flange, and then enters the smoke exhaust hole of the mounting seat through the guide flange, the airflow needs to be turned for many times, the flow path of the airflow is prolonged, and the possibility that the airflow can enter the valve body is reduced, so that the sealing effect of the non-return sheet is further improved.

The utility model provides a flue structure, include the utility model provides a check valve. The utility model discloses the flue structure has at least the utility model provides a check valve's beneficial effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a check valve provided in embodiment 1 of the present invention;

fig. 2 is an exploded view of a check valve provided in embodiment 1 of the present invention;

fig. 3 is a schematic view of the check valve provided in embodiment 1 of the present invention after being installed with a flue;

fig. 4 is a side view (with a partial section) of a check valve provided in embodiment 1 of the present invention;

FIG. 5 is an enlarged view of a portion of the portion A of FIG. 4;

fig. 6 is a schematic view of a valve body of a check valve provided in embodiment 1 of the present invention;

FIG. 7 is a cross-sectional view taken at location B of FIG. 1;

fig. 8 is a schematic view of a rear side surface of a non-return plate of a check valve according to embodiment 1 of the present invention;

fig. 9 is a cross-sectional view of a non-return plate of the check valve according to embodiment 1 of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at position G;

fig. 11 is an exploded view of a non-return plate of the check valve according to embodiment 1 of the present invention;

fig. 12 is an exploded view of a non-return assembly and a fire prevention assembly of a check valve according to embodiment 1 of the present invention;

fig. 13 is a schematic view of a mounting seat of a check valve provided in embodiment 1 of the present invention;

fig. 14 is a sectional view of a mounting seat of a check valve provided in embodiment 1 of the present invention;

FIG. 15 is an enlarged view of a portion of FIG. 14 at position D;

fig. 16 is a schematic view of a temperature control element of a check valve according to embodiment 1 of the present invention;

fig. 17 is a schematic view of an installation of a check torsion spring of the check valve according to embodiment 1 of the present invention;

fig. 18 is a partial sectional view of a check valve according to embodiment 1 of the present invention;

fig. 19 is a schematic view of a bracket, a rotating shaft and a fireproof assembly of the check valve provided in embodiment 1 of the present invention;

fig. 20 is a schematic view of a fire prevention push rod of a check valve provided in embodiment 1 of the present invention;

fig. 21 is a schematic view of a second limiting member of the check valve according to embodiment 1 of the present invention;

fig. 22 is a schematic view of a bracket of the check valve provided in embodiment 1 of the present invention;

fig. 23 is a schematic view of the check valve provided in embodiment 1 of the present invention when the check valve is opened;

FIG. 24 is an enlarged view of a portion of FIG. 23 at position E;

fig. 25 is a schematic view of the check valve provided in embodiment 1 of the present invention when closed;

FIG. 26 is an enlarged partial view taken at position F in FIG. 25;

FIG. 27 is a schematic view from another perspective of FIG. 25;

fig. 28 is an exploded view of a check valve according to embodiment 2 of the present invention;

fig. 29 is a schematic view of a non-return plate of a check valve according to embodiment 2 of the present invention;

fig. 30 is a schematic view of a mounting seat of a check valve provided in embodiment 2 of the present invention;

fig. 31 is a schematic view of a fire prevention push rod of a check valve provided in embodiment 2 of the present invention;

fig. 32 is a schematic view of a check valve provided in embodiment 2 of the present invention (the fire-protection assembly is not opened);

fig. 33 is a schematic view of the check valve provided in embodiment 2 of the present invention (the fire-proof assembly is opened);

fig. 34 is an exploded view of a check valve provided in embodiment 3 of the present invention;

fig. 35 is a schematic view of a fire protection assembly and a check assembly of a check valve provided in embodiment 3 of the present invention;

fig. 36 is a schematic view of a fire prevention push rod of a check valve according to embodiment 3 of the present invention;

fig. 37 is a schematic view of a non-return piece mounting bracket of a check valve according to embodiment 3 of the present invention;

fig. 38 is a schematic view of the check ring of the check valve according to embodiment 3 of the present invention after opening;

fig. 39 is a schematic view of a check plate of a check valve according to embodiment 3 of the present invention after closing.

Icon: 100-a valve body; 101-a valve bore; 110-a circumferential connection; 111-a third counterbore; 120-a connecting end; 121-a second counterbore; 130-a flange; 131-a stop edge; 132-flange mounting holes; 140-annular fixation surface; 141-second fixing hole; 150-an indicator; 160-nameplate portion; 200-a mounting seat; 201-guiding flanging; 210-a circumferential plate; 211-connecting plate; 212-a fixed plate; 213-mounting groove; 214-a first fixation hole; 215-installing a flange; 2151-third mounting hole; 2152-stop; 220-an end plate; 221-a sealing surface; 222-smoke exhaust holes; 223-a first counterbore; 230-pressing groove; 240-fifth fixing hole; 250-a connection slot; 310-backstop sheet; 311-a seal; 313-a recess; 314-a gasket; 3141-elastic skirt; 315-ring imprinting; 316-pressing the bag; 317-a connecting frame; 318-first casting hole; 320-a rotating shaft; 330-non-return torsion spring; 400-pre-tightening the torsion spring; 410-pre-tightening the fixed end; 510-temperature control; 511-a first fixing sheet; 5111-a first main panel; 5112-first fold; 5113-second casting hole; 512-a second fixing sheet; 5121-connecting the inserting edge; 5122-second fold; 5123-welding and flanging; 5124-a second main panel; 5125-fourth fixing hole; 520-fireproof push rod; 521-a main body rod; 522-a rotating part; 5221-a second stop; 5222-a second mounting hole; 5224-a guide ramp; 5225-pin hole; 523-mounting a rod; 524-bending part; 525-an extension; 530-a stent; 531-a first mounting plate; 5312 a limiting plate; 5313-a first limiting member; 5314-a first mounting hole; 532-a second mounting plate; 5321-a shaft support hole; 533-a third mounting plate; 5331-step embossing; 5332-bracket fixing holes; 540-fireproof torsion spring; 600-non-return sheet mounting rack; 610-non-return connection plate; 620-first non-return fixing plate; 621-fireproof push rod fixing hole; 630-a second non-return fixing plate; 631-a third fixation hole; 640-a card slot; 660-clamping angle flanging; 700-flue; 800-frame body; d-the separation distance.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 27, the present embodiment provides a check valve for being mounted on a wall of a flue 700 of a user, for discharging oil smoke, and preventing the oil smoke from flowing back into a room.

The check valve of the present embodiment includes a valve body 100, a mounting seat 200, and a backstop assembly. The mounting seat 200 is connected to the outlet end of the valve body 100, a smoke exhaust hole 222 communicated with the valve hole 101 of the valve body 100 is formed in the mounting seat 200, a sealing surface 221 is formed on the circumferential edge of one end, far away from the valve body 100, of the smoke exhaust hole 222, a guide flange 201 is arranged at one end, close to the smoke exhaust hole 222, of the sealing surface 221 in a circumferential direction of the smoke exhaust hole 222, the guide flange 201 extends away from one side, where the valve body 100 is located, the non-return component comprises a non-return sheet 310, the non-return sheet 310 is movably connected to one side, far away from the valve body 100, of the mounting seat 200, the non-return sheet 310 can move relative to the mounting seat 200 to seal or open the smoke exhaust hole 222, a sealing portion 311 is arranged on the circumferential edge of the non-return sheet 310, a concave portion 313 is arranged on the inner side, in the circumferential direction of the sealing portion 311, when the non-return sheet 310 seals the smoke exhaust hole 222, the sealing portion 311 abuts against the sealing surface 221, and the guide flange 201 is inserted into the concave portion 313.

As shown in fig. 1, the rear end of the check valve is a smoke outlet, the front end of the check valve is connected with the range hood through an exhaust pipe, and the front end of the check valve is a smoke inlet. The guide flange 201 extends rearward with respect to the sealing surface 221, the front end surface of the check plate 310 is recessed rearward, and the rear end surface is protruded rearward to form a recess 313, and the guide flange 201 is engaged with the recess 313. The valve hole 101 of the valve body 100 and the smoke discharge hole 222 of the mounting seat 200 are aligned, and form a smoke discharge passage. The valve hole 101 is circular, the check plate 310 is also circular, and the outer side of the recess 313 (i.e., the side of the recess 313 away from the center of the check plate 310) is the sealing part 311. The mounting seat 200 is formed with a sealing surface 221 on the outer side of the guide flange 201 (the side of the guide flange 201 away from the center of the smoke discharge hole 222), and the sealing portion 311 is in fit sealing with the sealing surface 221.

The check valve of the embodiment is connected with the valve body 100 and the check sheet 310 through the mounting seat 200, and the position of the check sheet 310 can be guided and positioned by the matching of the guide flange 201 arranged on the mounting seat 200 and the concave part 313 of the check sheet 310, so that even if the check sheet 310 is slightly misplaced in the process of movably sealing or opening the smoke exhaust hole 222, the check sheet 310 can be smoothly guided into the sealing surface 221 under the matching of the guide flange 201 and the concave part 313, and the sealing effect of the check sheet 310 is ensured. Moreover, the guide flange 201 is arranged on the inner side of the sealing surface 221, when the non-return sheet 310 seals the smoke exhaust hole 222, the air flow needs to pass through the sealing surface 221 and then move to the guide flange 201, then enters the smoke exhaust hole 222 of the mounting seat 200 through the guide flange 201, the air flow needs to be turned for multiple times, the flow path of the air flow is prolonged, the possibility that the air flow can enter the valve body 100 is reduced, and therefore the sealing effect of the non-return sheet 310 on the valve body 100 is further improved.

As shown in fig. 14, 15 and 18, in one implementation of the present embodiment, the guide flange 201 is gradually retracted from the end close to the sealing surface 221 to the end far from the sealing surface 221, that is, the guide flange 201 is gradually retracted from the front to the back.

It can be understood that the guiding flange 201 is an extension part of a smoke channel formed by the smoke discharge hole 222 and the valve hole 101, the guiding flange 201 is inclined inwards along the direction from front to back to form a retraction structure, and when the non-return sheet 310 is opened and operated, the guiding flange 201 also has a certain guiding effect on inlet smoke (airflow), so that sudden change of the section is avoided.

The sealing surface 221 and the guide flange 201 of the check valve of this embodiment are of an integral structure, and specifically, one end of the sealing surface 221, which is close to the smoke exhaust hole 222, is turned outwards away from the side where the valve body 100 is located to form the guide flange 201, that is, the inner end of the sealing surface 221 is turned backwards to form the guide flange 201. The guide flange 201 in the form is convenient to process, and the problem of connection and sealing does not need to be considered at the joint of the sealing surface 221 and the guide flange 201.

In one implementation, the outlet end of the smoke evacuation aperture 222 is angled upward relative to the valve aperture 101.

As shown in fig. 14 and 15, the annular sealing surface 221 is inclined backward from top to bottom, and the annular guide flange 201 has the same structure at any position, so that the plane of the outlet end of the smoke discharge hole 222 finally formed by the guide flange 201 is parallel to the plane of the sealing surface 221, and the outlet end of the smoke discharge hole 222 is inclined upward relative to the valve hole 101. As shown in FIG. 3, the outlet end of the smoke exhaust holes 222, which are upwardly facing, cause the smoke to flow upwardly as it passes the outlet end of the smoke exhaust holes 222, the path of the smoke flow being shown by the arrows in FIG. 3.

Specifically, the axial direction of the outlet end of the smoke discharge hole 222 and the axial direction of the valve hole 101 of the valve body 100 are arranged at a preset angle, and the preset angle is greater than zero degree and less than or equal to 10 degrees. Referring to fig. 1 and 14, the valve body 100 of the check valve is horizontally disposed, the valve hole 101 of the valve body 100 extends in a horizontal direction, and the axial direction of the outlet end of the smoke discharge hole 222 is perpendicular to the plane of the annular sealing surface 221. An included angle between a plane where the outlet end of the smoke discharge hole 222 is located and an axis of the valve hole 101 (that is, an included angle between a plane where the annular sealing surface 221 is located and the horizontal direction) and a preset angle between an axial direction of the outlet end of the smoke discharge hole 222 and an axial direction of the valve hole 101 of the valve body 100 are complementary angles, an included angle between a plane where the outlet end of the smoke discharge hole 222 is located and the axis of the valve hole 101 is greater than or equal to 80 degrees and smaller than 90 degrees, specifically, the included angle may be 80 degrees, 81 degrees, 82 degrees, 83 degrees, 84 degrees, 85 degrees, 86 degrees, 87 degrees, 88 degrees, and 89 degrees, and is preferably 85 degrees in this embodiment.

It can be understood that, the included angle between the plane where the outlet end of the smoke discharge hole 222 is located and the axis of the valve hole 101 is greater than or equal to 80 degrees and smaller than 90 degrees, which not only can ensure that the smoke has the tendency of flowing upwards, but also can avoid the situation that the length (the length in the front-back direction) of the circumferential plate 210 below the mounting seat 200 is too wide, which causes large gravity torque and is not beneficial to installation.

The mounting seat 200 of the check valve of the present embodiment includes a circumferential plate 210 and an end plate 220, the circumferential plate 210 is attached to a circumferential edge of the end plate 220, and a smoke discharge hole 222 and a sealing surface 221 are provided on the end plate 220. As shown in fig. 13, a circular smoke discharge hole 222 is formed in the inner side of the end plate 220, the rear side of the end plate 220 is a sealing surface 221, and the inner edge of the end plate 220 extends rearward to form a guide flange 201. The outlet end of the valve body 100 is provided with a connection end portion 120 and a circumferential connection portion 110, the connection end portion 120 is wound around the circumference of the valve hole 101 provided in the valve body 100, the connection end portion 120 is perpendicular to the axis of the valve body 100, and the circumferential connection portion 110 is connected to the circumferential edge of the connection end portion 120. The end plate 220 is fixedly connected with the connecting end portion 120, the circumferential plate 210 is located on one side of the end plate 220 away from the valve body 100, the circumferential connecting portion 110 is located on one side of the connecting end portion 120 away from an inlet of the valve body 100, and the circumferential plate 210 is sleeved in the circumferential connecting portion 110.

In one implementation, the end plate 220 is connected to the connecting end 120 by a first cylindrical fastener, and specifically, the end plate 220 may be provided with a first counter bore 223. The connecting end portion 120 is provided with a second counter bore 121, in this embodiment, the first counter bore 223 and the second counter bore 121 are correspondingly provided in four, and the second counter bore 121 is provided on the front end face of the connecting end portion 120, and the number of the second counter bores is four, so as to fix the mounting seat 200. The first cylindrical fasteners are screws that are inserted through the first and second counterbores 223, 121. Silica gel filling can be added between the contact surfaces of the mounting seat 200 and the valve body 100, and the sealing performance of the check valve is improved.

Further, in order to ensure the connection sealing performance, a sealing silicone is filled between the end plate 220 and the connection end portion 120.

Wherein, in a concrete structure, the circumference edge of end plate 220 is provided with the connection turn-ups towards one side at circumference board 210 place, and circumference board 210 includes polylith connecting plate 211, and polylith connecting plate 211 sets gradually along the circumference of end plate 220, and through fixed plate 212 welded connection between the adjacent connecting plate 211, the both ends of fixed plate 212 are attached respectively in the outside of two connecting plates 211 that this fixed plate 212 is connected, and polylith connecting plate 211 all is connected with the connection turn-ups that corresponds the position.

As shown in fig. 12 and 13, the bottom of the end plate 220 is provided with a circle of connecting flange, including a round corner position, which ensures that the bottom surface is more smooth, the tops of the four sides of the circumferential plate 210 are spot-welded together through the fixing plate 212, which ensures the strength of each vertical edge of the inclined surface, and the vertical edge is not high and deformed, which affects the assembly positions of other parts, and also prevents the non-return component from interfering with the vertical edge when being opened, and two clearance steps of the end plate 220 are mainly avoided for the second counter bore 121 on the upper part of the front surface of the valve body 100, so as to avoid interference.

The circumferential edge of the outlet end of the valve body 100 of the check valve of the present embodiment is provided with a flange 130 for connection with the stack 700. As shown in fig. 6, the circumferential connecting portion 110 and the connecting end portion 120 of the valve body 100 are of an integral structure, one end of the circumferential connecting portion 110, which is far away from the connecting end portion 120, is connected with a flange 130, and the circumferential direction of the flange 130 protrudes out of the circumferential outer edge of the circumferential connecting portion 110. The flange 130 is provided with a plurality of flange mounting holes 132 along a circumferential direction of the flange 130. Specifically, in this embodiment, the circumferential connecting portion 110 is substantially rectangular, the flange 130 has four flanges connected end to end, and a flange mounting hole 132 is formed in the center of each flange, so as to ensure effective fixation between the check valve and the wall surface. Screws are inserted through one or more flange mounting holes 132 in the flange 130 and then connected to the stack 700, thereby securing the check valve to the stack 700.

In this embodiment, an end of the circumferential plate 210 away from the end plate 220 protrudes from a side of the flange 130 away from the valve body 100. Referring to fig. 5, the rear end of the circumferential plate 210 protrudes from the rear side of the flange 130, that is, the rear end of the circumferential plate 210 is located outside the rear end of the flange 130.

Specifically, the spacing distance d between one end of the circumferential plate 210 away from the valve body 100 and the flange 130 in the axial direction (horizontal direction) of the valve hole 101 is not less than 5 mm.

It can be understood that, after the installation base 200 is installed, since the circumferential plate 210 of the installation base 200 protrudes from the flange 130, and is relatively lower than the vertical edge (the horizontal edge shown in fig. 4) of the installation base 200 than the flange 130, when the flange 130 is connected with the outer wall surface (wall surface) of the flue 700, the protruding portion of the circumferential plate 210 is inserted into the flue 700. Therefore, the opening formed in the flue 700 for installing the check valve can ensure that the check valve can be installed in place as long as the installation seat 200 can be normally installed, and the check plate 310 is always positioned in the circumferential plate 210 during overturning, so that the check plate 310 cannot interfere with the wall surface in the rotation process.

Preferably, the circumferential edge of the flange 130 on the side facing the flue 700 is provided with a stop edge 131 preventing the fixing glue from overflowing. In this embodiment, the rear side of flange 130 is laminated with flue 700, and the rear side of corresponding flange 130 evenly scribbles the fixed glue, and this fixed glue can be silica gel, and flange 130 outer lane has the oblique chamfer of round, and the chamfer forms only flange 131 to one side, has guaranteed that silica gel is not excessive, and is more pleasing to the eye. In addition, the silica gel is arranged between the flange 130 and the flue 700, so that the connection tightness of the check valve and the flue 700 is further improved.

To facilitate the installation of the check valve, the check valve further comprises a pre-installation member provided on the mounting seat 200 and/or the valve body 100, which can be received inside the circumferential connection portion 110 and can be unfolded to extend to the outside of the circumferential connection portion 110.

The pre-mount may initially secure the check valve during an initial stage of installation of the check valve to facilitate subsequent use of the screw to connect the flange 130 to the flue 700. In an alternative embodiment, the premounting component includes a preloaded torsion spring 400, the fixed end of the preloaded torsion spring 400 is defined as a preloaded fixed end 410 of the preloaded torsion spring 400, the preloaded fixed end 410 is fixed between the circumferential plate 210 and the circumferential connecting portion 110, and the free end of the preloaded torsion spring 400 can rotate in the radial direction of the valve body 100.

It is understood that the number of the pre-tensioned torsion springs 400 may be plural, and a plurality of the pre-tensioned torsion springs 400 are provided at intervals along the circumference of the circumferential plate 210. In the present embodiment, the number of the specific pre-tensioned torsion springs 400 is two, and the two pre-tensioned torsion springs are respectively disposed on the left and right sides of the mounting seat 200.

Two pre-tightening torsion springs 400 are fixed on two sides of the check valve, and the check valve plays a pre-tightening role after being initially installed in the flue 700, so that the check valve is ensured not to fall off after being initially installed in the flue 700. After the silica gel on the flange 130 is solidified, the reliability of the check valve fixation can be further improved. Four flange mounting holes 132 are formed on the flange edge of the valve body 100, and after the check valve is mounted on the wall wool of the flue 700, the flange mounting holes 132 are fixed by self-drilling and self-tapping screws, so that the pre-tightening force of the check valve is further improved.

In the present embodiment, a mounting groove 213 is formed on a side surface of the circumferential plate 210 facing the circumferential connecting portion 110, the mounting groove 213 is actually a concave stepped structure, and the pretension fixing end 410 of the pretension torsion spring 400 is fixed in the mounting groove 213. The installation groove 213 can reduce the gap between the valve body 100 and the installation seat 200, and the pre-tightening torsion spring 400 can fall in the outer dimension of the inclined plane plate in the transverse dimension, so that the installation is not influenced. The pretensioning fixed end 410 of the pretensioning torsion spring 400 is fixedly connected with the circumferential plate 210 and the circumferential connecting portion 110 through a second cylindrical fastener.

Specifically, the second cylindrical fastener is a countersunk screw, the circumferential plate 210 is provided with a first fixing hole 214, and the circumferential connecting portions 110 on the two sides of the valve body 100 are respectively provided with two third counter bores 111 for fixing the pre-tightening torsion spring 400, so that the torsion spring is guaranteed to be reliably fixed, the appearance is also guaranteed to be clean, and the installation of the valve body 100 is not influenced. The countersunk head screw passes through the first fixing hole 214, the pre-tightening fixing end 410 of the pre-tightening torsion spring 400, and the third countersunk hole 111 in sequence.

The pretension fixing end 410 of the pretension torsion spring 400 of the check valve of the present embodiment is clamped between the circumferential plate 210 and the circumferential connecting portion 110, two fixing ends of the pretension torsion spring 400 are clamped at the middle position by the countersunk head screw passing through the third counterbore 111, the pretension fixing end 410 of the pretension torsion spring 400 and the first fixing hole 214 on the circumferential plate 210, and are reliably fixed, and the whole pretension torsion spring 400 is located at the inner side of the mounting seat 200 after being fixed, so that the installation of the valve body 100 is not affected. In addition, because the valve body 100 is fixed by the third counter bores 111 at two sides, no screw head protrudes, and the appearance is more attractive.

The installation sequence of the check valve of this embodiment is that a square hole (corresponding to the existing commonly used check valve, generally, a square hole of 205 mm multiplied by 205 mm) is opened in the common flue, that is, the flue 700, then the check plate 310 of the check valve is opened, the free ends of the two pre-tightening torsion springs 400 are tightened to the central position by a binding tape, so that the free ends of the two pre-tightening torsion springs 400 fall on the inner side of the installation base 200, then silica gel is uniformly coated on the rear side surface of the flange 130, then the check valve is installed on the wall surface of the flue 700, then scissors are extended into the check valve hole 101, the binding tape fixing the free ends of the two pre-tightening torsion springs 400 is cut off, so that the free ends of the two pre-tightening torsion springs 400 are flicked to the two sides and are extruded to the inner surface or the side surface of the flue 700 hole, thus the check valve is initially fixed, and then is fixed on the flange installation hole 132 of the flange 130 by 1 or 2 self-drilling self-tapping screws, further reinforcing the connection of the check valve and the stack 700.

It should be noted that the installation manner of the preloaded torsion spring 400 is not limited to the above-mentioned form, for example, the preloaded torsion spring 400 is directly fixed on the valve body 100, and for example, the preloaded torsion spring 400 is directly fixed on the mounting seat 200.

The valve body 100 of the check valve of the present embodiment may have one or more fixing surfaces to be connected to the smoke discharge pipe. The plurality of fixing surfaces of the valve body 100 are a plurality of annular fixing surfaces 140 arranged in this order, and one of the two adjacent annular fixing surfaces 140 has an outer diameter larger than that of the other. The annular fixing surfaces 140 with different outer diameter sizes can be matched with smoke exhaust pipes with different sizes, and the universality of the check valve is improved. Any one of the annular fixing surfaces 140 is provided with a second fixing hole 141, and the second fixing hole 141 is used for connecting the valve body 100 with a smoke exhaust pipe. As shown in fig. 6, in a specific embodiment of the present invention, the valve body 100 includes two annular fixing surfaces 140, which are a first fixing surface and a second fixing surface, respectively, and a step is formed between the first fixing surface and the second fixing surface, so that the valve body can be adapted to various smoke pipes for connection, and the applicability is better. The first fixing surface and the second fixing surface are uniformly provided with four second fixing holes 141 in the circumferential direction, so that the connection between the smoke exhaust pipe and the valve body 100 can be enhanced, and the smoke exhaust pipe is prevented from falling off.

In one implementation, the valve body 100 of the check valve of the present embodiment is further provided with an indicator 150 for indicating the installation direction of the valve body 100; and/or, a nameplate portion 160 engraved with a nameplate is provided on the valve body 100.

As shown in fig. 6, an upward arrow is engraved on the front end surface of the valve body 100, and the upward arrow forms an indicator 150 for prompting an installer of an accurate installation direction when installing, preventing reverse installation. The upper end of the valve body 100 is engraved with the nameplate portion 160 of the check valve, so that a separate nameplate manufacturing can be omitted, the cost can be further reduced, and the reliability and durability of the nameplate can be improved.

A non-return assembly of the check valve of the present embodiment will be described in detail.

The backstop assembly further comprises a connecting frame 317 and a rotating shaft 320, the backstop sheet 310 is connected to the connecting frame 317, and the connecting frame 317 is hinged with the mounting seat 200 through the rotating shaft 320 so as to realize the overturning of the backstop sheet 310.

The check plate 310 includes a valve plate body, a gasket 314 is provided at a circumferential edge of the valve plate body, and the gasket 314 serves as a seal portion 311 for abutting against the seal surface 221.

Optionally, the material of the valve plate body is preferably a galvanized plate.

Optionally, the valve plate body is provided with a plurality of annular imprints 315 at intervals in sequence from the circumferential edge to the center, so as to enhance the strength of the valve plate body. The outermost ring-shaped stamp mark 315 protrudes to the rear side, so that a recessed portion 313 is formed on the front side of the valve plate body to be engaged with the guide bead 201. That is, the recessed portion 313 and the outermost ring-shaped stamp 315 have the same structure.

Optionally, the elastic skirt 3141 is provided on the side of the sealing gasket 314 facing the sealing surface 221, and the sealing performance of the sealing gasket 314 against the sealing surface 221 can be increased by the design of the elastic skirt 3141.

Specifically, in this embodiment, the connecting frame 317 may be made of a galvanized sheet material with a thickness of 1.5 mm, the check sheet 310 is made of a light and thin galvanized sheet material with a thickness of 0.7 mm or 0.6 mm, a plurality of annular ring-shaped imprints 315 are disposed inside the check sheet 310, and the connecting frame 317 and the check sheet 310 are connected by tobias riveting or welding. Due to the matching design, the portability of the backstop sheet 310 is ensured, and the backstop sheet 310 is ensured to have higher strength. As shown in fig. 9, 10 and 11, the sealing gasket 314 of the check plate 310 is disposed at the periphery of the check plate 310, the sealing gasket 314 of the check plate 310 is directly poured at the periphery of the check plate 310, and the periphery of the check plate 310 is further uniformly provided with the first pouring holes 318, so that the upper and lower sides of the sealing gasket 314 of the check plate 310 can be connected together through the small holes during the pouring process, thereby ensuring that the sealing gasket 314 of the check plate 310 does not have a risk of falling off. As shown in fig. 10, the elastic skirt 3141 is provided on the inner side of the sealing gasket 314 of the check plate 310, so that it is ensured that the sealing gasket 314 still has good sealing performance in the closed state even if the partial fitting dimension of the check plate 310 is not made in place.

In this embodiment, as shown in fig. 1, a connecting bracket 317 is connected to a lower end of a backstop 310, and the connecting bracket 317 is hinged to a mounting seat 200 through a rotation shaft 320, that is, the lower end of the backstop 310 is hinged to the mounting seat 200.

After the existing common check valve is installed in the flue 700, the upper end of the check valve is hinged, and due to the self-weight of the check assembly, the opening angle of the check plate 310 is too small to meet the requirement that the maximum opening angle of the check plate 310 should not be less than 60 degrees under the pressure of 80Pa (pressure unit) of the oil smoke discharge check valve. In addition, the blades (check pieces 310) are positioned above the oil smoke, so that the upward passage of the oil smoke is influenced, the initial speed of oil smoke gas is downward, the phenomenon that the next layer of users reverse the smoke and get smelly easily occurs, the pressure in the flue 700 is increased, and the smoke discharge is not facilitated. The rotation shaft 320 of the non-return component of the non-return valve of the embodiment is arranged below, and the non-return sheet 310 turns over from top to bottom, so as to avoid the influence of gravity on the opening angle of the non-return sheet 310, prevent the downward transmission of the oil smoke, guide the upward transmission of the oil smoke, be more beneficial to the transmission of the oil smoke in the flue 700, and not influence the kitchen environment of other users.

The backstop assembly further includes an elastic control member having one end connected to the mounting seat 200 and the other end acting on the backstop plate 310, the elastic control member enabling the backstop plate 310 to have a tendency to seal the smoke discharge hole 222.

It can be understood that the acting force of the elastic control member should be enough to press and seal the check sheet 310 on the smoke discharge hole 222 when the fan of the range hood is not turned on, and when the fan is turned on, the acting force of the elastic control member is less than the acting force of the check sheet 310 generated by the fan (the pressure formed by the acting force is usually 80Pa) to ensure that the check sheet 310 can be normally turned on.

In one implementation, the elastic control element includes a check torsion spring 330, the check torsion spring 330 is sleeved on the rotating shaft 320, a fixed end of the check torsion spring 330 is connected with the mounting seat 200, and a free end of the check torsion spring 330 abuts against a side surface of the check plate 310 away from the smoke discharge hole 222.

As shown in fig. 12 and 13, a circumferential plate 210 below the mount 200 is provided with a press groove 230. The reverse stopping torsion spring 330 is sleeved on the middle position of the rotating shaft 320 in the axial direction, the diameter of the reverse stopping torsion spring 330 is about 1.0 mm, the fixed end of the reverse stopping torsion spring 330 is clamped in the pressing groove 230, the free end is pressed on the outer surface of the reverse stopping sheet 310, and the reverse stopping assembly is acted on for a long time and used for pre-tightening the reverse stopping assembly. The torsion force of the check torsion spring 330 is to ensure that the check assembly can close the valve body 100 in the non-use state, and also to ensure that the check plate 310 can be opened at least 60 degrees in the forward pressure environment of 80 Pa.

In this embodiment, the check valve further includes a fixing bracket, and the rotating shaft 320 is hinged to the fixing bracket.

Check valve also includes a fire-blocking assembly that may be mounted directly to mount 200 or may be mounted to mount 200 via a mounting bracket. The fireproof component comprises a temperature control piece 510 and a driving mechanism; when the temperature is lower than the preset temperature, the temperature control member 510 acts on the driving mechanism to make the driving mechanism avoid the check plate 310, and when the temperature exceeds the preset temperature, the temperature control member 510 releases the driving mechanism, and the driving mechanism acts on the check plate 310 to drive the check plate 310 to seal the smoke discharge hole 222.

The preset temperature is the temperature in the flue in the case of fire, and is generally about 150 ℃.

In one implementation, the driving mechanism includes an elastic fireproof driving member and a fireproof pushing rod 520, the fireproof pushing rod 520 is used for abutting against the backstop sheet 310, the elastic fireproof driving member is disposed between the fireproof pushing rod 520 and the mounting seat 200, the elastic fireproof driving member enables the fireproof pushing rod 520 to have a tendency of approaching and driving the backstop sheet 310 to seal the smoke discharge hole 222, and the fireproof pushing rod 520 is connected with the temperature control member 510. The temperature control member 510 includes a first fixing plate 511, the first fixing plate 511 is fixed on the mounting base 200 by a welding portion, and the welding portion is separated from the first fixing plate 511 when the temperature reaches a preset temperature.

It will be appreciated that the drive mechanism functions to force backstop 310 to close in the event of a fire in smoke stack 700. Therefore, under normal flue environment, the pre-tightening force generated by the elastic fire-proof driving member on the fire-proof push rod 520 should be greater than the force (the pressure generated by the force is about 300 pa) for forcing the check plate 310 to open when the fan is running or a fire occurs.

The first fixing piece 511 may be connected to the mounting base 200 by a welding portion, for example, a welding portion formed by a welding material may be directly connected to the first fixing piece. In this embodiment, the welding portion includes a second fixing plate 512, the second fixing plate 512 is fixedly connected to the mounting base 200, and the second fixing plate 512 are welded by a welding material. The melting point of the welding material is a preset temperature.

Specifically, the installation manner of the temperature control element 510 of this embodiment is as follows, the check valve further includes a third cylindrical fastener, the second fixing plate 512 is provided with a fourth fixing hole 5125, and the second fixing plate 512 is provided with a connecting inserting edge 5121; the mounting seat 200 is provided with a fifth fixing hole 240 and a connection slot 250, the connection inserting edge 5121 is inserted into the connection slot 250, and a third cylindrical fastener passes through the fourth fixing hole 5125 and the fifth fixing hole 240 to fix the second fixing plate 512 on the mounting seat 200.

As shown in fig. 12 and 13, the connection slot 250 and the fifth fixing hole 240 are both provided on the circumferential connection portion 110 below the mount 200. As shown in fig. 16, the first fixing piece 511 includes a first main body 5111, one end of the first main body 5111 is provided with a first folding edge 5112; the second fixing plate 512 comprises a second main plate body 5124, the two ends of the second main plate body 5124 deviate from each other and extend to form a second flange 5122 and a third flange, the third flange is connected with an inserting edge 5121 and inserted into the connecting slot 250, the second flange 5122 is folded to form a welding flange 5123, the welding flange 5123 and one end of the first main plate body 5111 far away from the first flange 5112 are welded through a welding material, and a containing space for a fireproof push rod 520 is formed between the second flange 5122 and the first main plate body 5111.

The first fixed piece 511 and the second fixed piece 512 of this embodiment constitute a fire prevention piece, all adopt the copper sheet preparation to form, and first fixed piece 511 and second fixed piece can be the soldering connection, have seted up the second on the first main lamellar body 5111 and have pour hole 5113, mainly use the filling soldering, guarantee that the part welds the back reliably, can not drop. Be provided with fourth fixed orifices 5125 on the second main leaf body 5124 of second stationary blade 512, the bottom is equipped with the third hem (also connect and inserts limit 5121), and the fire prevention piece is when fixed, and the third hem of bottom passes in the connection slot 250 on the circumferential plate 210, is fixed fire prevention piece and mount pad 200 together, has guaranteed that the fire prevention piece is fixed with a screw, can not beat the commentaries on classics again, and the fire prevention piece can restrict fire prevention push rod 520 position under normal atmospheric temperature environment simultaneously.

In this embodiment, the fire-proof push rod 520 includes an installation rod 523 and a main rod 521, the main rod 521 is fixedly connected to the installation rod 523 and forms an included angle, the installation rod 523 is rotatably connected to the fixing frame, and the main rod 521 is connected to the temperature control unit 510; the resilient fire-resistant actuator is disposed between the mount and the mounting bar 523 or the main body bar 521.

The holder includes two brackets 530 spaced apart on one side of the smoke discharge hole 222. Specifically, the left and right sides below the end plate 220 of the mounting base 200 are respectively provided with a fourth counterbore, and the two brackets 530 are respectively mounted on the left and right sides of the rear side surface of the end plate 220 of the mounting base 200 through the fourth counterbores. The two ends of the rotating shaft 320 are connected to the left and right brackets 530, respectively. The left and right brackets 530 simultaneously support the fire prevention push rod 520.

Specifically, both ends of the main rod 521 are connected with mounting rods 523, one end of each mounting rod 523, which is far away from the main rod 521, is connected with a rotating part 522, the rotating parts 522 are arranged in parallel with the main rod 521, and the two rotating parts 522 are respectively connected with the two brackets 530 in a rotating manner.

In this embodiment, the two brackets 530 are provided with the elastic fireproof driving member, the elastic fireproof driving member includes the fireproof torsion springs 540, the two fireproof torsion springs 540 are respectively sleeved on the two rotating portions 522, the fixed ends of the fireproof torsion springs 540 are connected with the brackets 530, and the free ends of the fireproof torsion springs 540 are connected with the mounting rods 523 corresponding to the ends.

The rotating parts 522 are connected to the end parts of the mounting rods 523 far away from the main body rod 521, the two rotating parts 522 extend away from the main body rod 521, and the included angle between the rotating parts 522 and the mounting rods 523 is an acute angle. That is, as shown in fig. 19 and 20, the rotating portion 522 corresponds to a horizontal side, the mounting rod 523 corresponds to a vertical side, and the bending angle between the horizontal side and the vertical side is smaller than 90 °, so the design is mainly to increase the size of the mounting position of the fireproof torsion spring 540 (i.e., increase the length of the mounting rod 523) without increasing the external dimension, increase the number of turns of the fireproof torsion spring 540, and improve the torsion force of the fireproof torsion spring 540.

One side of each of the two first mounting plates 531, which is close to each other, is connected with a limiting plate 5312, the limiting plate 5312 and the first mounting plates 531 form a clamping angle, and the fixed end of the fireproof torsion spring 540 abuts against the inside of the clamping angle.

In this embodiment, each of the brackets 530 includes a first mounting plate 531, a second mounting plate 532 and a third mounting plate 533, the third mounting plate 533 of the same bracket 530 is connected between the second mounting plate 532 and the first mounting plate 531, the second mounting plates 532 of the two brackets 530 are disposed oppositely, and the rotating shaft 320 is disposed on the two second mounting plates 532. The third mounting plate 533 is fixedly connected to the mounting base 200. The two first mounting plates 531 are disposed oppositely, a first limiting member 5313 is disposed on the first mounting plate 531, a second limiting member 5221 is disposed on each rotating portion 522, and when the fire-proof push rod 520 rotates to make the check plate 310 seal the smoke discharge hole 222, the first limiting member 5313 is locked with the second limiting member 5221 at the corresponding end.

In a specific implementation manner, the first mounting plate 531 is provided with first mounting holes 5314, the rotating portions 522 are inserted into the first mounting holes 5314, ends of the two rotating portions 522, which are far away from each other, respectively penetrate through the corresponding first mounting holes 5314 and are provided with second limiting members 5221, and sides of the two first mounting plates 531, which are far away from each other, are provided with first limiting members 5313, respectively. The second limiting member 5221 is provided with a second mounting hole 5222, and the rotating portion 522 passes through the second mounting hole 5222 and is connected to a bolt.

Specifically, as shown in fig. 20, the ends of the two rotating portions 522 away from each other have a part of a shaft with a planar structure, and are mainly matched with and provided with the second retaining members 5221. As shown in fig. 21, the second limiting member 5221 is a sheet-shaped structure, the second mounting hole 5222 formed in the second limiting member 5221 is also a vertical plane structure, the second mounting hole 5222 is completely matched with the shaft of the plane structure of the rotating portion 522 of the fire-proof push rod 520, after the two are mounted, there is no rotation between the fire-proof push rod 520 and the second limiting member 5221, and the fire-proof push rod 520 rotates to drive the second limiting member 5221 to rotate together. Two ends of the fire-proof push rod 520, that is, the shafts of the planar structures of the two rotating portions 522, are provided with a pin hole 5225 for fixing a pin, and the pin limits the axial position of the second limiting member 5221.

Further, the second retaining member 5221 is provided with a guide slope 5224. As shown in fig. 19, 24 and 26, the first position-limiting member 5313 includes an elastic buckle, and when the second position-limiting member 5221 and the fire-proof push rod 520 rotate synchronously, the guiding inclined surface 5224 slides around the elastic buckle, so that the second position-limiting member 5221 abuts against the elastic buckle to lock the fire-proof push rod 520.

As shown in fig. 21, the second retaining member 5221 of the present embodiment adopts an inclined surface forming structure, so as to ensure that the second retaining member 5221 can rotate forward easily along with the fire-proof push rod 520, and after the second retaining member rotates forward to a position, the second retaining member is locked with the unidirectional elastic buckle on the left and right brackets 530, and cannot rotate reversely, so that the fire-proof push rod 520 is also limited from rotating reversely under the condition of reverse acting force, and the fire-proof performance of the non-return assembly in a high temperature environment is improved.

The general installation process of the drive mechanism of the fire protection assembly is as follows: a fireproof torsion spring 540 is fixed on each of the two sides of the fireproof push rod 520, and the elasticity of the fireproof torsion spring 540 is not weakened at high temperature; then, fixing left and right brackets 530 at both sides of the fireproof pushing rod 520 to support the position of the rotation center (i.e., the rotation part 522) of the fireproof pushing rod 520; second position-limiting members 5221 are respectively mounted on the rotating portions 522 at both sides of the fire-proof push rod 520, and a plug pin is inserted into the pin hole 5225 to prevent the second position-limiting members 5221 from sliding out.

The third mounting plates 533 at the bottom of the two supports 530 of the check valve of this embodiment each have a step stamp 5331 for avoiding the first counterbore 223 on the end plate 220 of the mounting seat 200, so as to prevent interference with the first counterbore 223 on the end plate 220 of the mounting seat 200, and to ensure that the mounting seat 200 and the valve body 100 can be tightly attached to each other. The stepped embossing 5331 has several bracket fixing holes 5332 for fixing the bracket 530. The left side bracket 530 and the right side bracket 530 are disposed in axial symmetry, and the structure of the bracket 530 will be described by taking the right side bracket 530 as an example. As shown in fig. 22, a left side flange of the right bracket 530 is also the second mounting plate 532, the second mounting plate 532 is provided with a rotating shaft supporting hole 5321, a right side flange of the right bracket 530 forms the first mounting plate 531, the first mounting plate 531 is provided with a fireproof push rod 520 supporting hole and an elastic buckle, and the one-way elastic buckle is matched with the second limiting member 5221 for use, so that the check assembly is ensured not to be opened even if positive pressure exists in a fire environment, and a propagation path of flame is blocked. The upper end of the right flange of the right bracket 530 on the right side is provided with an inward flange, the flange is also a limit plate 5312, the front part of the limit plate 5312 is provided with a 45-degree cut angle, and the cut angle is mainly used for installing the fixed end of the fireproof torsion spring 540 to ensure that the fixed end of the fireproof torsion spring 540 cannot slip. As shown in fig. 19, the free ends of the fireproof torsion springs 540 are engaged with the two sides of the fireproof pushing rod 520, so that the fireproof pushing rod 520 has a pre-tightening force.

Under normal temperature environment, the fireproof torsion springs 540 at two sides of the fireproof push rod 520 have positive pretightening force to the fireproof push rod 520, but the fireproof push rod 520 is limited at the bottom of the check valve by the temperature control piece 510, namely the fireproof sheet, and cannot rotate, and the non-return assembly can be freely opened or closed along with the use condition of the range hood. When fire breaks out in the flue 700 and the temperature reaches about 150 ℃, the tin solder on the temperature control element 510 (fire-proof sheet) melts, one of the copper sheets falls off, the fire-proof push rod 520 cannot be restricted any more, the fire-proof push rod 520 is pushed by the fire-proof torsion springs 540 at both sides to rotate forward and extrude the non-return component, the non-return component is forced to close to block the flame propagation, the fire-proof push rod 520 drives the second limiting element 5221 to rotate forward when rotating forward, when the fire-proof push rod 520 extrudes the non-return component, the second limiting element 5221 is also clamped into the upper end of the unidirectional elastic buckle, the two are completely clamped and cannot rotate reversely, and the sealing performance of the non-return component is further ensured, as shown in fig. 23, fig. 24, fig. 25 and fig. 26.

Example 2

As shown in fig. 28 to 33, the present embodiment provides a check valve, which is different from embodiment 1 mainly in fixing of the fixing bracket and the fireproof pushing rod 520.

Specifically, the side of the backstop 310 facing away from the smoke discharge hole 222 can be further provided with a pressing bag 316. As shown in fig. 35, the check piece 310 is provided at a rear end surface thereof with a press packet 316 protruding rearward, and the press packet 316 is provided with a guide surface facing obliquely downward, the guide surface being inclined upward from front to rear.

The pressing bag 316 can enhance the strength and the flatness of the check plate 310, and ensure that the check plate 310 is well sealed. Meanwhile, the pressing bag 316 also provides an extrusion surface of the fireproof push rod 520, so that the fireproof push rod 520 can effectively extrude the backstop component when the fireproof function is started, the backstop component is more firmly sealed, and flame is blocked.

The rack of this embodiment includes a rack body 800, the rack body 800 is installed below the mounting seat 200, and the rack body 800 is only used for supporting the rotating shaft 320 of the ratchets 310.

The circumferential plate 210 below the mounting seat 200 (in detail, the circumferential plate 210 may be a left lower corner or a right lower corner) has a mounting flange 215 extending inwards, at least two mounting flanges 215 are arranged at intervals along a direction perpendicular to the end plate 220, and a third mounting hole 2151 is arranged on the mounting flange 215. The fireproof push rod 520 comprises a main body rod 521 and an installation rod 523, the main body rod 521 and the installation rod 523 are arranged at an included angle, the installation rod 523 is rotatably arranged in third installation holes 2151 of the installation flanges 215 in a penetrating mode, the elastic fireproof driving piece comprises a fireproof torsion spring 540, the fireproof torsion spring 540 is sleeved on the installation rod 523 between the two adjacent installation flanges 215, the fixed end of the fireproof torsion spring 540 abuts against the circumferential plate 210, the free end of the fireproof torsion spring 540 is connected with the main body rod 521, the main body rod 521 is connected with the temperature control piece 510, and when the temperature control piece 510 releases the main body rod 521, one end, far away from the installation rod 523, of the main body rod 521 can abut against the backstop piece 310.

The mounting flange 215 positioned at the uppermost side of the at least two mounting flanges 215 is provided with a stop member 2152, and when the body lever 521 causes the non-return sheet 310 to seal the smoke discharge hole 222, the body lever 521 abuts against the stop member 2152.

Specifically, as shown in fig. 28, fig. 30, fig. 32 and fig. 33, in the present embodiment, the mounting flanges 215 are respectively disposed on the front and rear sides of the circumferential plate 210 at the lower right corner of the mounting base 200, the two mounting flanges 215 are respectively provided with a third mounting hole 2151, and the two third mounting holes 2151 are concentric and are mainly used for fixing the fixing end of the fire-proof push rod 520. The installation flange 215 is further provided with a stop member 2152, so that the rotation transition of the fireproof push rod 520 is limited, the fireproof push rod 520 is prevented from rotating around the pressure bag 316 under the action of the fireproof torsion spring 540, the installation is influenced, the installation structure of the fireproof push rod 520 is directly integrated on the inclined plane plate part in the embodiment, no part needs to be added, and the part cost and the generation process are effectively reduced.

The installation process of the fireproof assembly of the check valve of this embodiment is substantially, the fixed end of the fireproof push rod 520, that is, the installation rod 523, is inserted into the third installation hole 2151 of the installation flange 215 near the rear side (the installation flange 215 far away from the end plate 220) and then penetrates through the fireproof torsion spring 540, and then penetrates through the third installation hole 2151 of the installation flange 215 near the front side (the installation flange 215 near the end plate 220), the fireproof torsion spring 540 is fixed at the middle position of the two installation flanges 215, the free end of the fireproof torsion spring 540 is installed in a matching manner with the fireproof push rod 520, after installation, the fireproof push rod 520 has a forward pre-tightening force, and the fireproof push rod 520 is limited at the bottom position of the installation seat 200 by the temperature control element 510, that is, the fireproof sheet.

In the check valve of this embodiment, at normal temperature, the fire-proof push rod 520 cannot rotate due to the limitation of the temperature control element 510, i.e., the fire-proof sheet, but is subjected to a positive pre-tightening force. The backstop sheet 310 can be automatically opened or closed according to the use condition of the cigarette machine. In case of fire in the flue 700, the temperature of the check valve reaches about 150 ℃, the solder on the temperature control element 510 melts, one of the copper sheets falls off, and the fire-proof push rod 520 cannot be restricted any more, the fire-proof push rod 520 rotates forward under the push of the fire-proof torsion spring 540, and presses the pressing packet 316 on the check sheet 310, and the check assembly is forced to close, so as to block the flame propagation, as shown in fig. 32 and 33.

The conventional check valve also has a structure that the check plate 310 is reliably locked by the rotation of the fireproof push rod 520, but the fireproof push rod 520 is only arranged above, and the check plate is required to be in a bottom-up and upturning structure, and the rotation point of the check plate 310 is designed above. In the embodiment, the check can be locked by the rotation structure of the fireproof push rod 520 even if the rotation center is designed below the pressing bag 316 structure of the check piece 310, so that the fireproof assembly is reliable, the check piece 310 can be opened at a larger angle, and the air exhaust amount is increased.

It should be noted that the check valve of the present embodiment may have any other structure as in embodiment 1.

Example 3

As shown in fig. 34 to 39, the present embodiment provides a check valve, which is different from embodiment 1 or embodiment 2 mainly in the related components and fixing manner of the fireproof push rod 520, the rotation shaft 320 and the check torsion spring 330.

The two ends of the main rod 521 of the fireproof push rod 520 of the present embodiment are bent to the same side to form a bent portion 524, the ends of the two bent portions 524 away from the main rod 521 are bent to form an extending portion 525, the bent portion 524 and the extending portion 525 form an installation rod 523, and the extending portion 525 serves as the rotating shaft 320. The elastic fireproof driving member comprises two fireproof torsion springs 540, the two fireproof torsion springs 540 are respectively sleeved on the two extending portions 525, the fixed ends of the fireproof torsion springs 540 are connected with the fixing frame, and the free ends of the fireproof torsion springs 540 are connected with the bending portions 524 or the main body rods 521.

The fixing frame includes a non-return sheet mounting frame 600, the non-return sheet mounting frame 600 includes a non-return connecting plate 610, and two first non-return fixing plates 620 and two second non-return fixing plates 630 mounted on the non-return connecting plate 610, the two second non-return fixing plates 630 are oppositely disposed at intervals, the two first non-return fixing plates 620 are oppositely disposed at intervals, and the two second non-return fixing plates 630 are disposed between the two first non-return fixing plates 620. The two first non-return fixing plates 620 are provided with fireproof push rod fixing holes 621, and the two extending portions 525 penetrate through the fireproof push rod fixing holes 621 from the sides of the two first non-return fixing plates 620 far away from each other and are connected with the non-return plates 310. The second non-return fixing plates 630 are fixed with non-return torsion springs 330, and the free ends of the non-return torsion springs 330 are abutted against the side of the non-return plate 310 far away from the smoke discharge hole 222.

Specifically, the check valve of this embodiment combines the fire-proof push rod 520 and the rotating shaft 320 into a single component, and specifically, the two ends of the fire-proof push rod 520 are folded back inward to form the main rod 521 and the rotating shaft 320, as shown in fig. 35 and 39. During assembly, the two folded portions (i.e., the extension portions 525) of the fire prevention push rod 520 are respectively installed with a fire prevention torsion spring 540, the two folded portions (i.e., the extension portions 525) of the fire prevention push rod 520 are fixed to the two first non-return fixing plates 620 of the non-return sheet mounting bracket 600, and the non-return assembly is further installed at the inner sides of the two first non-return fixing plates 620. Specifically, the end of the extending portion 525 is provided with a clamping groove 640, the connecting frame 317 of the backstop sheet 310 is provided with a hinge hole, the extending portion 525 is inserted into the hinge hole, and then the C-shaped clamp spring is clamped into the clamping groove 640 to prevent the backstop assembly from falling off. The fixed end of the fireproof torsion spring 540 is clamped into the clamping angle flange 660 on the side surface of the check piece mounting frame 600, the main body rod 521 of the fireproof push rod 520 is fixed by the free end of the fireproof torsion spring 540, so that the fireproof push rod 520 has positive pretightening force, the fireproof push rod 520 rotates around the rotating shaft 320 (namely the extension portion 525) partially, and the main body rod 521 is fixed at the bottom of the check valve by the temperature control element 510. In the embodiment, the fireproof push rod 520 and the rotating shaft 320 for supporting the rotation of the check plate 310 are combined into one part, so that the processing procedure and cost of the part are reduced, the installation is convenient, and the reliability is improved.

As shown in fig. 37, the vertical edge portions of the two ends of the non-return sheet mounting bracket 600 form a first non-return fixing plate 620, and the top of the first non-return fixing plate 620 is provided with a hinge hole for supporting the two end folded portions, i.e., the extending portions 525, of the fire prevention push rod 520. The lower parts of the two first non-return fixing plates 620 are respectively provided with a clamping angle flange 660 of about 45 degrees for fixing the fixed end of the fireproof torsion spring 540, and the design of the clamping angle flanges 660 can effectively ensure that the fireproof torsion spring 540 is easy to mount and is not easy to fall off. Two vertical flanges are formed in the middle of the ratchet mounting bracket 600, and form a second ratchet fixing plate 630, and a third fixing hole 631 is formed in the second ratchet fixing plate 630, for fixing the fixing end of the ratchet torsion spring 330. The ratchet mounting bracket 600 integrates four functions, a rotating shaft 320 supporting the ratchets 310, a supporting fireproof push rod 520, a fixed end fixing the fireproof torsion spring 540 and a fixed end fixing the ratchet torsion spring 330, reduces the use of other parts of the bracket 530, reduces the cost, and improves the reliability and the machinability.

The two ends of the non-return torsion spring 330 are fixed ends, and are fixed to the second non-return fixing plate 630, the free ends are U-shaped structures, and are extruded on the rear side surface of the connecting frame 317, so as to ensure the pre-tightening force of the connecting frame 317 in the closing direction under the conventional condition, so that the non-return component is in a sealing state, and when the forward pressure reaches 80Pa, the maximum opening angle of the non-return component is greater than 60 °. Ensuring smooth ventilation.

In the check valve of this embodiment, at normal temperature, the fire-proof push rod 520 cannot rotate due to the limitation of the temperature control member 510, but is subjected to a pre-tightening force. The backstop sheet 310 can be automatically opened or closed according to the use condition of the cigarette machine. In case of fire in the flue 700, the temperature of the check valve reaches about 150 ℃, the solder on the temperature control element 510 melts, one of the copper sheets falls off, the fireproof push rod 520 cannot be restricted any more, the fireproof push rod 520 rotates forward under the pushing of the fireproof torsion spring 540, and is pressed onto the connecting frame 317, the check assembly is forcibly closed, and the flame transmission is blocked, as shown in fig. 38 and 39.

Other structures of the check valve of the present embodiment can be referred to embodiment 1.

Example 4

The present embodiment provides a flue structure including the check valve provided in embodiment 1 or embodiment 2 or embodiment 3.

The flue structure of the present embodiment has the same beneficial effects as the check valve provided in embodiment 1, embodiment 2, or embodiment 3, and is not repeated herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (46)

1. A check valve, comprising a valve body (100), a mounting seat (200), and a backstop assembly;

the mounting seat (200) is connected to the outlet end of the valve body (100), a smoke exhaust hole (222) communicated with a valve hole (101) of the valve body (100) is formed in the mounting seat (200), a sealing surface (221) is formed on the circumferential edge of one side, away from the valve body (100), of the smoke exhaust hole (222) of the mounting seat (200), a guide flanging (201) is arranged at one end, close to the smoke exhaust hole (222), of the sealing surface (221) in a circumferential mode around the circumferential direction of the smoke exhaust hole (222), and the guide flanging (201) extends away from the valve body (100);

non-return subassembly includes non-return piece (310), non-return piece (310) swing joint be in keeping away from of mount pad (200) one side of valve body (100), non-return piece (310) can be relative mount pad (200) activity is in order to seal or open smoke vent (222), the circumference edge of non-return piece (310) is provided with sealing (311), non-return piece (310) is in the inboard at the circumference edge of sealing (311) is provided with depressed part (313), non-return piece (310) seal during smoke vent (222), sealing (311) with sealing face (221) butt, direction turn-ups (201) insert in depressed part (313).

2. The non-return valve according to claim 1, characterized in that the guide flange (201) tapers inwardly from the end close to the sealing surface (221) to the end remote from the sealing surface (221).

3. The non-return valve according to claim 1, characterized in that the end of the sealing surface (221) close to the smoke exhaust hole (222) is folded back to the side facing away from the valve body (100) to form the guide flange (201).

4. The check valve of claim 1, wherein an outlet end of the smoke exhaust hole (222) is disposed to face upward with respect to the valve hole (101).

5. The check valve according to claim 4, characterized in that the angle between the plane of the outlet end of the smoke exhaust hole (222) and the axis of the valve hole (101) is greater than or equal to 80 degrees and smaller than 90 degrees.

6. The check valve of claim 1, wherein the mounting seat (200) comprises a circumferential plate (210) and an end plate (220), the circumferential plate (210) being attached to a circumferential edge of the end plate (220), the smoke evacuation hole (222) and the sealing surface (221) being provided on the end plate (220);

the outlet end of the valve body (100) is provided with a connecting end part (120) and a circumferential connecting part (110), the connecting end part (120) is wound on the circumferential direction of a valve hole (101) of the valve body (100), the connecting end part (120) is perpendicular to the axis of the valve body (100), and the circumferential connecting part (110) is connected to the circumferential edge of the connecting end part (120);

circumferential direction connecting portion (110) are located one side that entrance of valve body (100) was kept away from in coupling end portion (120), circumference board (210) are located end plate (220) are kept away from one side of valve body (100), end plate (220) with coupling end portion (120) fixed connection, circumference board (210) cover is established in circumferential direction connecting portion (110).

7. The non-return valve according to claim 6, characterized in that a flange (130) for connection with a flue (700) is connected to the end of the circumferential connection (110) remote from the connection end (120).

8. The non-return valve according to claim 7, characterized in that the circumferential edge of the flange (130) on the side facing the flue (700) is provided with a stop edge (131) preventing the fixing glue from overflowing;

and/or;

the flange (130) is provided with a plurality of flange mounting holes (132) along the circumferential direction of the flange (130).

9. The check valve of claim 7, wherein an end of the circumferential plate (210) remote from the end plate (220) protrudes beyond a side of the flange (130) remote from the valve body (100).

10. The check valve according to claim 9, wherein a spacing distance (d) between an end of the circumferential plate (210) remote from the valve body (100) and the flange (130) in an axial direction of the valve hole (101) is not less than 5 mm.

11. The check valve according to claim 6, characterized in that a connecting flange is arranged on one side of the circumferential edge of the end plate (220) facing the circumferential plate (210), the circumferential plate (210) comprises a plurality of connecting plates (211), the connecting plates (211) are sequentially arranged along the circumferential direction of the end plate (220), the adjacent connecting plates (211) are connected by a fixing plate (212) in a welding manner, two ends of the fixing plate (212) are respectively attached to the outer sides of the two connecting plates (211) connected with the fixing plate (212), and the connecting plates (211) are connected with the connecting flanges at corresponding positions.

12. The check valve of claim 6, wherein the end plate (220) is connected to the connecting end portion (120) by a first cylindrical fastener, a first counter bore (223) is provided on the end plate (220), a second counter bore (121) is provided on the connecting end portion (120), and the first cylindrical fastener is inserted into the first counter bore (223) and the second counter bore (121);

and/or;

and sealing silica gel is filled between the end plate (220) and the connecting end part (120).

13. The non-return valve according to any one of claims 6 to 12, characterized in that it further comprises a pre-mount provided on the mounting seat (200) and/or on the valve body (100), which pre-mount can be received inside the circumferential connection (110) and which pre-mount can be extended to the outside of the circumferential connection (110).

14. The non-return valve according to claim 13, characterized in that the pre-mounting comprises a pre-tensioned torsion spring (400), the pre-tensioned fixed end (410) of the pre-tensioned torsion spring (400) being fixed between the circumferential plate (210) and the circumferential connection (110), the free end of the pre-tensioned torsion spring (400) being rotatable in the radial direction of the valve body (100).

15. The non-return valve according to claim 14, characterized in that the circumferential plate (210) is provided with a mounting groove (213) on the side facing the circumferential connection (110), the pretensioned fixed end (410) of the pretensioned torsion spring (400) being fixed in the mounting groove (213).

16. The non-return valve according to claim 14, characterized in that the pre-tensioned torsion spring (400) is provided in a plurality, the pre-tensioned torsion spring (400) being provided in a plurality spaced apart along the circumference of the circumferential plate (210).

17. The non-return valve according to claim 14, characterized in that the pretensioned fixed end (410) of the pretensioned torsion spring (400) is fixedly connected to the circumferential plate (210) and the circumferential connection (110) by means of a second cylindrical fastening.

18. The check valve of claim 17, wherein the second cylindrical fastener is a countersunk screw, the circumferential plate (210) is provided with a first fixing hole (214), the circumferential connecting portion (110) is provided with a third countersunk hole (111), and the countersunk screw sequentially passes through the first fixing hole (214), the pre-tightening fixing end (410) of the pre-tightening torsion spring (400) and the third countersunk hole (111).

19. The check valve according to any one of claims 1 to 12, wherein the valve body (100) is provided with a plurality of annular fixing surfaces (140) in sequence, and one of two adjacent annular fixing surfaces (140) has an outer diameter larger than that of the other.

20. The check valve according to claim 19, wherein any one of the annular fixing surfaces (140) is provided with a second fixing hole (141), and the second fixing hole (141) is used for realizing the connection of the valve body (100) and a smoke exhaust pipe.

21. The check valve according to any one of claims 1 to 12, wherein an indicator (150) for indicating an installation direction of the valve body (100) is provided on the valve body (100);

and/or;

the valve body (100) is provided with a nameplate part (160) engraved with a nameplate.

22. The non-return valve according to any of claims 1 to 12, characterized in that the non-return plate (310) comprises a plate body, the circumferential edge of which is provided with a gasket (314), the gasket (314) being adapted to abut against the sealing surface (221).

23. The check valve of claim 22, wherein the valve plate body is a galvanized plate;

and/or;

a plurality of annular imprints (315) are sequentially arranged on the valve plate body at intervals from the circumferential edge to the center;

and/or;

the side of the gasket (314) facing the sealing surface (221) is provided with an elastic skirt (3141).

24. The non-return valve according to any one of claims 1 to 12, wherein the non-return assembly further comprises a rotating shaft (320) and an elastic control member, the non-return plate (310) is hinged to the mounting seat (200) through the rotating shaft (320), one end of the elastic control member is connected to the mounting seat (200), the other end of the elastic control member acts on the non-return plate (310), and the elastic control member enables the non-return plate (310) to have a tendency to seal the smoke discharge hole (222).

25. The check valve according to claim 24, wherein the elastic control member comprises a check torsion spring (330), the check torsion spring (330) is sleeved on the rotating shaft (320), a fixed end of the check torsion spring (330) is connected with the mounting seat (200), and a free end of the check torsion spring (330) abuts against a side surface of the check plate (310) departing from the smoke discharge hole (222).

26. The check valve according to claim 25, wherein a pressure groove (230) is provided on the mounting seat (200), and a fixed end of the non-return torsion spring (330) is inserted into the pressure groove (230);

and/or;

the non-return torsion spring (330) is arranged at the middle position of the rotating shaft (320) in the axial direction.

27. The check valve of any of claims 1 to 12, further comprising a fire protection assembly mounted on the mounting seat (200), the fire protection assembly comprising a temperature control member (510) and a drive mechanism;

when the temperature is lower than the preset temperature, the temperature control piece (510) acts on the driving mechanism to enable the driving mechanism to avoid the non-return sheet (310), when the temperature exceeds the preset temperature, the temperature control piece (510) releases the driving mechanism, and the driving mechanism acts on the non-return sheet (310) to drive the non-return sheet (310) to seal the smoke exhaust hole (222).

28. The check valve of claim 27, wherein the driving mechanism comprises an elastic fire prevention driving member and a fire prevention push rod (520), the fire prevention push rod (520) is used for abutting against the check plate (310), the elastic fire prevention driving member is arranged between the fire prevention push rod (520) and the mounting seat (200), the elastic fire prevention driving member enables the fire prevention push rod (520) to have a tendency of driving the check plate (310) to seal the smoke discharge hole (222), and the fire prevention push rod (520) is connected with the temperature control member (510).

29. The check valve of claim 28, wherein the temperature control member (510) comprises a first fixing plate (511), the first fixing plate (511) is connected with the fireproof push rod (520), the first fixing plate (511) is fixed on the mounting seat (200) through a welding part, and the welding part is separated from the first fixing plate (511) when the temperature reaches a preset temperature.

30. The check valve of claim 29, wherein the welding portion includes a second fixing plate (512), the second fixing plate (512) is fixedly connected with the mounting seat (200), and the first fixing plate (511) and the second fixing plate (512) are welded by a welding material, which is melted at a preset temperature.

31. The check valve as claimed in claim 30, further comprising a third cylindrical fastener, wherein the second fixing plate (512) is provided with a fourth fixing hole (5125) and the second fixing plate (512) is provided with a connection flange (5121);

the mounting seat (200) is provided with a fifth fixing hole (240) and a connecting slot (250), the connecting inserting edge (5121) is inserted into the connecting slot (250), and a third columnar fastener penetrates through a fourth fixing hole (5125) and the fifth fixing hole (240) to fix the second fixing piece (512) on the mounting seat (200).

32. The non-return valve according to claim 28, characterized in that it comprises a fixed frame on which the non-return flap (310) is hinged by means of a rotating shaft (320);

the fireproof push rod (520) comprises an installation rod (523) and a main body rod (521), the main body rod (521) is fixedly connected with the installation rod (523) and arranged in an included angle, the installation rod (523) is rotatably connected to the fixed frame, and the main body rod (521) is connected with the temperature control component (510);

the elastic fireproof driving piece is arranged between the fixed frame and the mounting rod (523) or the main body rod (521).

33. The check valve as claimed in claim 32, wherein the fixing frame comprises two brackets (530) spaced apart from each other at one side of the smoke discharge hole (222), and both ends of the rotating shaft (320) are connected to the two brackets (530), respectively;

the two ends of the main body rod (521) are connected with mounting rods (523), one end, far away from the main body rod (521), of each mounting rod (523) is connected with a rotating portion (522), the rotating portions (522) are arranged in parallel with the main body rod (521), and the two rotating portions (522) are respectively connected with the two brackets (530) in a rotating mode.

34. The check valve according to claim 33, wherein each bracket (530) includes a first mounting plate (531), the two first mounting plates (531) are disposed opposite to each other, a first retaining member (5313) is disposed on the first mounting plate (531), a second retaining member (5221) is disposed on each rotating portion (522), and when the fire-proof push rod (520) rotates to make the check plate (310) seal the smoke discharge hole (222), the first retaining member (5313) is locked with the second retaining member (5221) at the corresponding end.

35. The check valve according to claim 34, wherein the first mounting plate (531) is provided with first mounting holes (5314), the rotating portions (522) are inserted into the first mounting holes (5314), and the ends of the two rotating portions (522) that are far away from each other are respectively provided with the second stoppers (5221) after passing through the corresponding first mounting holes (5314), and the sides of the two first mounting plates (531) that are far away from each other are respectively provided with the first stoppers (5313).

36. The check valve according to claim 35, wherein a second mounting hole (5222) is formed on the second retaining member (5221), and a plug is connected to the rotating portion (522) after passing through the second mounting hole (5222);

and/or;

the second limiting piece (5221) is provided with a guide inclined surface (5224), the first limiting piece (5313) comprises an elastic buckle, and when the second limiting piece (5221) and the fireproof push rod (520) synchronously rotate, the guide inclined surface (5224) slides to bypass the elastic buckle, so that the first limiting piece (5313) is abutted to the elastic buckle to lock the fireproof push rod (520).

37. The non-return valve according to claim 34, characterized in that the resilient fire driving member comprises two fire torsion springs (540), the two fire torsion springs (540) are respectively sleeved on the two rotating portions (522), the fixed ends of the fire torsion springs (540) are connected with the bracket (530), and the free ends of the fire torsion springs (540) are connected with the mounting rods (523) at the corresponding ends.

38. The check valve of claim 37, wherein the rotating part (522) is connected to an end of the mounting rod (523) far away from the main body rod (521), and the two rotating parts (522) extend away from the main body rod (521), and an included angle between the rotating part (522) and the mounting rod (523) is an acute angle;

and/or;

one side that is close to each other on two first mounting panel (531) is connected with limiting plate (5312), limiting plate (5312) with first mounting panel (531) form the tight angle of clamp, the stiff end butt of fire prevention torsional spring (540) is in the tight angle of clamp.

39. The check valve of claim 34, wherein the bracket (530) further comprises a second mounting plate (532) and a third mounting plate (533), the third mounting plate (533) of the same bracket (530) being connected between the second mounting plate (532) and the first mounting plate (531), the second mounting plates (532) of the two brackets (530) being disposed opposite to each other, the rotary shaft (320) being disposed on the two second mounting plates (532);

the third mounting plate (533) is fixedly connected with the mounting base (200).

40. The non-return valve according to any of claims 1 to 10, characterized in that the side of the non-return sheet (310) facing away from the smoke exhaust hole (222) is provided with a pressed packet (316).

41. The check valve of claim 28, wherein the circumferential plate (210) of the mounting seat (200) has a mounting flange (215) extending inward, and at least two mounting flanges (215) are spaced apart from each other in a direction perpendicular to the end plate (220) of the mounting seat (200), and the mounting flanges (215) have third mounting holes (2151);

the fireproof push rod (520) comprises a main body rod (521) and a mounting rod (523), the main body rod (521) and the mounting rod (523) are arranged at an included angle, the mounting rod (523) is rotatably arranged in third mounting holes (2151) of the mounting flanges (215) in a penetrating way, the elastic fireproof driving piece comprises a fireproof torsion spring (540), the fireproof torsion spring (540) is sleeved on the mounting rod (523) between two adjacent mounting flanges (215), the fixed end of the fireproof torsion spring (540) is abutted against the circumferential plate (210), the free end of the fireproof torsion spring (540) is connected with the main body rod (521), the main body rod (521) is connected with the temperature control part (510), and when the temperature control member (510) releases the main body rod (521), one end of the main body rod (521), which is far away from the mounting rod (523), can be abutted against the backstop sheet (310).

42. The check valve according to claim 41, wherein a stop member (2152) is disposed on the mounting flange (215), and the main body rod (521) abuts against the stop member (2152) when the check plate (310) seals the smoke discharge hole (222).

43. The check valve according to claim 32, wherein two ends of the main body rod (521) are bent toward the same side to form bent portions (524), one ends of the two bent portions (524) away from the main body rod (521) are mutually close to each other to form extending portions (525), the extending portions (525) are rotatably connected to the fixing frame, the bent portions (524) serve as the mounting rods (523), and the extending portions (525) serve as the rotating shafts (320);

elasticity fire prevention driving piece includes two fire prevention torsional springs (540), two fire prevention torsional spring (540) overlaps respectively and establishes two on extension portion (525), the stiff end of fire prevention torsional spring (540) with the mount is connected, the free end of fire prevention torsional spring (540) with kink (524) or main part pole (521) are connected.

44. The check valve of claim 43, wherein the fixing frame comprises a check plate mounting frame (600), the check plate mounting frame (600) comprises a check connecting plate (610) and two first check fixing plates (620) and two second check fixing plates (630) mounted on the check connecting plate (610), the two second check fixing plates (630) are oppositely arranged at intervals, the two first check fixing plates (620) are oppositely arranged at intervals, and the two second check fixing plates (630) are arranged between the two first check fixing plates (620);

the two first non-return fixing plates (620) are provided with fireproof push rod fixing holes (621), and the two extending parts (525) penetrate through the fireproof push rod fixing holes (621) from the sides, far away from each other, of the two first non-return fixing plates (620) and are connected with the non-return sheets (310);

and the second non-return fixing plates (630) are fixedly provided with non-return torsion springs (330), and the free ends of the non-return torsion springs (330) are abutted against one sides of the non-return sheets (310) far away from the smoke exhaust hole (222).

45. The check valve according to any one of claims 1 to 12, wherein the lower end of the non-return flap (310) is hinged to the mounting seat (200).

46. A flue structure comprising the check valve according to any one of claims 1 to 45.

Images