CN209370479U - A kind of fire-preventing check valve - Google Patents

Abstract

The utility model discloses a kind of fire-preventing check valves, including the valve body with exhaust outlet and the valve block for covering the exhaust outlet, the inside circumference of the valve block has the loop landing zones for being sealingly engaged the exhaust outlet, it is characterized in that, the guide card at least partly connecting oriented valve inner and extending of the internal edge of loop landing zones described in the interior lateral edge of the valve block.Gathering for valve block and exhaust ports greasy dirt can be effectively prevented in the fire-preventing check valve of the utility model, reduces exhaust resistance and avoids the interference of air-flow in exhaust duct.

Description

A kind of fire-preventing check valve

Technical field

The utility model relates to a kind of building ventilation field more particularly to a kind of fire-preventing check valves.

Background technique

In house or commercial building, upper and lower level building is typically provided with sharing of exhaust road, each layer kitchen, toilet respectively with Sharing of exhaust road connection, so that flue gas or foul smell are discharged into exhausting duct by exhaust apparatus such as smoke exhaust ventilators.It shares in order to prevent Flue gas in exhausting duct flows backward, and is equipped with check-valves between the exhaust apparatus and shared air duct in each kitchen, toilet.This Outside, when fire occurs for other floors in order to prevent, the pyrotechnics in sharing of exhaust road, which flows backward, enters this family room, also requires the check-valves It should be fire resisting damper, when fire occurs for other rooms, be automatically closed to prevent fire spread.

However, fire-preventing check valve in the prior art happens occasionally valve block by flue gas greasy dirt contamination after caused valve block with The problems such as valve body adhesion or valve block are unable to completely close；Also, there are the flue gases flowed in exhaust duct to do for some fire-preventing check valves The problem of disturbing fire-preventing check valve exhaust；In addition, some fire-preventing check valves, which are also possible to retaining mechanism failure, leads to fire-proof smoke insulation function The problem of failure；Furthermore, it is also desirable to fire-preventing check valve can be turned off manually when needed to ensure fire-proof smoke insulation.Therefore, still Need improved fire-preventing check valve further to solve above-mentioned technical problem.

Utility model content

In order to solve the above technical problems, the utility model provide a kind of fire-preventing check valve with valve block retaining mechanism and Its application method.Specifically, the utility model provides following technical scheme.

The one aspect of the utility model provides a kind of fire-preventing check valve, including the valve body with exhaust outlet and for covering The valve block of the exhaust outlet, the inside circumference of the valve block have the loop landing zones for being sealingly engaged the exhaust outlet, institute State the guide card at least partly connecting oriented valve inner and extending of the internal edge of loop landing zones described in the interior lateral edge of valve block.

Further, when the fire-preventing check valve is mounted on vertical exhaust duct side wall and the valve block covers the row When port, the first part's guide card for being attached at least to the lowermost portion of the internal edge of the loop landing zones diagonally descends direction Extend into valve inner；Preferably, first part's guide card extends between the direction of valve inner and horizontal direction Angle be 1-25 degree, such as 1-20 degree, 1-15 degree, 2-12 degree, 3-10 degree, 4-8 degree, 5-6 degree.

Further, when the fire-preventing check valve is mounted on vertical exhaust duct side wall and the valve block covers the row When port, the guide card only is connected in the lower half portion of the internal edge of the loop landing zones；Preferably, described first The left and right sides of guide card is divided respectively to upwardly extend independently along the internal edge of the loop landing zones no more than the valve block Center.

Further, when the valve block covers the exhaust outlet, the guide card extends into most greatly enhancing for valve inner Degree is no more than the 120% of the radius of the valve block, such as 110%, 100%, 90%, 80%, 60%；Preferably, described first Part guide card extend into the minimum length of valve inner not less than the valve block radius 1%, such as 2%, 3%, 5%, 10%, 20%, 30%, 40%, 50%；Preferably, guide card highest respective at left and right sides of first part's guide card Place extends into the length of the part of valve inner simultaneously not less than the distance between the highest point and first part's guide card And 120% of the radius no more than the valve block, such as 110%, 100%, 90%, 80%, 60%；Preferably, the guide card The length for the part that respective highest point extends into valve inner at left and right sides of first part's guide card is the guide card Extend into the maximum length of valve inner.

Further, when the fire-preventing check valve is mounted on vertical exhaust duct side wall, the upper limb of the exhaust outlet To exhaust duct sidewall slope；Preferably, the angle of plane and vertical direction where the exhaust outlet is 1-30 degree, such as 5-25 Degree, 10-20 degree, about 15 degree；Preferably, the valve body is horizontally disposed straight tube, and the exhaust outlet is set to the end of the straight tube The angle in portion, plane and the straight tube axis where the exhaust outlet is 1-30 degree, such as 5-25 degree, 10-20 degree, about 15 Degree；Preferably, the bent tube section being bent upwards that the valve body includes horizontally disposed straight drum part and is connected with straight drum part, The exhaust outlet is set to the end of the bent tube section, and the plane where the exhaust outlet is perpendicular to the bent tube section end Axis, the angle between the axis of the straight drum part and the axis of the bent tube section end are 1-30 degree, such as 5-25 degree, 10-20 degree, about 15 degree.

Further, when the fire-preventing check valve is mounted on vertical exhaust duct side wall, the valve block passes through valve block Shaft and the valve body are rotationally connected with the lower edge of the exhaust outlet；Preferably, the center of gravity of the valve block is located at valve block shaft The side of close valve body upper or positioned at valve block shaft or the side of the separate valve body positioned at valve block shaft；Preferably, Described in the side that the center of gravity of the valve block is located at the close valve body of valve block shaft makes when the valve block covers the exhaust outlet Valve block swings to the exhaust outlet under the effect of gravity.

Further, the gap when the valve block is opened, described in the guide card block between valve block and the exhaust outlet At least partly；Preferably, the gap described in the guide card block between valve block and the exhaust outlet from the exhaust outlet Lower edge respective highest point in part at left and right sides of first part's guide card to the guide card；Preferably, the guide card envelope Keep off the part no more than the valve block center in the gap between the valve block and the exhaust outlet.

Further, protrusion, table on the inside of the edge of the protrusion and the valve block are additionally provided in the loop landing zones Face connects, and the protrusion has peak potion, spine and slope portion, and the peak potion is located at the middle part of the protrusion, and the spine has multiple And respectively since the peak potion extends and is connected on the valve block inner surface, the slope portion have it is multiple be respectively connected on it is adjacent Liang Ge spine and the valve block inner surface；Preferably, plane where the edge of the prominent institute's valve block of the peak potion；Preferably, institute It states and is formed by bending recess portion to the direction far from valve inner in the middle part of valve block, and the protrusion is located at the middle part of the recess portion；It is excellent Selection of land forms cavity between the protrusion and the inner surface of the valve block.

The meaning of " complete " " substantially " is not precluded in the description of the present invention,." substantially not such as an ingredient Containing " Y, it is also possible to be entirely free of Y.If desired, " substantially " can delete from the utility model definition." containing " both Including the factor mentioned, also allow to include additional, uncertain factor." about ", " left and right " and expression each component concentration system In the case where, refer to +/- the 5% of standard value, +/- 4%, +/- 3%, +/- 2%, +/- 1%, +/- 0.5%."and/or" indicates It can be respectively used alone, mutually can also arbitrarily be combined by its multiple term connected.

In the utility model, example is generally illustrated by a certain range, is intended merely to concise explanation, rather than Limitations of the present invention.The range of description includes subrange, is also included within individual numerical value all within the scope of this.Example Such as, 1~6 this range, including subrange such as 1~3,1~4,1~5,2~4,2~6,3~6 etc. also include single within the scope of this Only numerical value, such as 1,2,3,4,5,6.

In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ", The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" be based on Orientation or positional relationship shown in the drawings is merely for convenience of description the utility model, rather than the dress of indication or suggestion meaning It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model Limitation.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the fire-preventing check valve of the utility model；

Fig. 2 is the structural schematic diagram of the first retaining mechanism of fire-preventing check valve shown in Fig. 1；

Fig. 3 is the structural schematic diagram of compression bar positioning region in the first retaining mechanism shown in Fig. 2；

Fig. 4 is the structural schematic diagram of moving casing in compression bar positioning region shown in Fig. 3；

Fig. 5 is the structural schematic diagram of the second retaining mechanism of fire-preventing check valve shown in Fig. 1；

Fig. 6 is the structural schematic diagram of fire-preventing check valve shown in Fig. 1 with rectification shield；

Fig. 7 is the cross section structure schematic diagram that fire-preventing check valve shown in Fig. 1 is in close state；

Fig. 8 is the cross section structure schematic diagram in the open state of fire-preventing check valve shown in Fig. 1；

Fig. 9 is the structural schematic diagram of the valve block of fire-preventing check valve shown in Fig. 1；

Figure 10 is the cross section structure schematic diagram of valve block shown in Fig. 9；

Figure 11 is the structural schematic diagram of valve block shown in Fig. 9 with wind-guiding commutator segment；

In figure: 1- valve body；11- exhaust outlet；12- straight drum part；13- valve seat；14- fixed frame；15- fixing clamp；16- rectification Shield；17- strainer；18- blast connection；19- bent tube section；2- temperature sensing element；3- valve block；31- valve block shaft；32- valve block closes Close spring；33- valve block rotating shaft winch；34- valve block positioning region；35- oppression department；36- valve block connecting plate；37- guide card；371- first Part guide card；The highest point of 372- guide card；38- is used for the protrusion of water conservancy diversion；The loop landing zones 39-；381- peak potion；The first ridge of 382- Portion；The second spine of 383-；384- third spine；The first slope 385- portion；The second slope 386- portion；387- third slope portion；41- compression bar； 411- pressure unit；412- compression bar shaft；The first positioning pin of 413-；42- compression bar positioning region；421- block compression bar；422- first is limited Position plate；The second limit plate of 423-；424- third limit plate；425- contact switch positioning region；The first limit hole of 426-；427- second Limit hole；428- third limit hole；43- compression bar rotation spring；The first retaining spring of 44-；45- moving casing；451- positioning pin Slot；452- positions tongue；The inclined-plane 453-；51- bar；52- bar shaft；The second positioning pin of 521-；53- bar positioning region； The 4th limit plate of 531-；The 4th limit hole of 532-；54- bar knob；The second retaining spring of 55-；56- fixed sleeving；561- A positioning gap；The second locating notch of 562-；The gap 7-；91- contact switch；92- gas componant detection device.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

Refering to fig. 1-11, the one aspect of the utility model provides a kind of fire-preventing check valve, including with exhaust outlet 11 The inside circumference of valve body 1 and valve block 3 for covering the exhaust outlet 11, the valve block 3 has for being sealingly engaged the row The loop landing zones 39 of port, at least partly connection of the internal edge of loop landing zones 39 described in the interior lateral edge of the valve block 3 The guide card 37 of oriented 1 internal stretch of valve body.If desired, sealing ring can be arranged at annular combined area 39.By the way that guide card is arranged 37 will can effectively be adhered to the oil of the inside of valve block 3 formed by pollutants such as oil droplets in the flue gas by valve body 1 Dirt is channeled out the inner surface of valve block 3, avoids greasy dirt from accumulating in the lower edge of valve block 3 and the lower edge of exhaust outlet 11, to have Effect avoids the problem of the problem of greasy dirt hinders valve block 3 to completely close exhaust outlet 11 and greasy dirt bonding valve block 3 and exhaust outlet 11.

When the fire-preventing check valve is mounted on vertical exhaust duct side wall and the valve block 3 covers the exhaust outlet 11 When, in the guide card 37, the first part for being attached at least to the lowermost portion of the internal edge of the loop landing zones 39 is led Piece 371 diagonally descends direction to extend into the inside of valve body 1；Preferably, first part's guide card 371 extends into valve body 1 Angle between internal direction and horizontal direction is 1-25 degree, for example, 1-20 degree, 1-15 degree, 2-12 degree, 3-10 degree, 4-8 degree, 5-6 degree.By the way that the lowermost portion of guide card 37 namely first part's guide card 371 to 1 inner inclination of valve body, are conducive on valve block 3 The greasy dirt gathered under the effect of gravity under the guidance of first part guide card 371 far from valve block 3 and exhaust outlet 11.

When the fire-preventing check valve is mounted on vertical exhaust duct side wall and the valve block 3 covers the exhaust outlet 11 When, only the guide card 37 is connected in the lower half portion of the internal edge of the loop landing zones 39；Preferably, described first The left and right sides of guide card 371 is divided respectively to upwardly extend independently along the internal edge of the loop landing zones 39 no more than the valve The center of piece 3.Only in the lower half portion of valve block 3, setting guide card 37 can be to avoid the windage that top half may cause.

When the valve block 3 covers the exhaust outlet 11, the guide card 37 extends into the maximum length inside valve body 1 not More than the 120% of the radius of the valve block 3, such as 110%, 100%, 90%, 80%, 60%；Preferably, the first part Guide card 371 extend into the minimum length inside valve body 1 not less than the valve block 3 radius 1%, such as 2%, 3%, 5%, 10%, 20%, 30%, 40%, 50%；Preferably, the guide card 37 is in 371 left and right sides of first part's guide card respective Highest point 372 extends into the length of the part of valve inner not less than the highest point 372 and first part's guide card 371 Between vertical range and be no more than the valve block 37 radius 120%, such as 110%, 100%, 90%, 80%, 60%；Preferably, the guide card 37 highest point 372 respective in 371 left and right sides of first part's guide card extends into valve The length of part inside body 1 is that the guide card 37 extends into maximum length inside valve body 1.As above guide card size as defined in Guide card 37 can be made successfully to pass in and out exhaust outlet 11 during valve block 37 is opened and closed, and avoid touching valve body 1；In addition, as above The length of defined first part's guide card 371 can be in the case where guaranteeing to export greasy dirt, first when valve block 3 being avoided to open as far as possible The issuable windage of part guide card 371.

When the fire-preventing check valve is mounted on vertical exhaust duct side wall, the upper limb of the exhaust outlet 11 is to exhaust duct Sidewall slope；Preferably, the angle of the 11 place plane of exhaust outlet and vertical direction is 1-30 degree, such as 5-25 degree, 10-20 Degree, about 15 degree；Preferably, the valve body 1 includes horizontally disposed straight drum part 12 and is bent up with what straight drum part 12 was connected Bent bent tube section 19, the exhaust outlet 11 are set to the end of the bent tube section 19, and the plane where the exhaust outlet 11 is hung down Directly in the axis of 19 end of bent tube section, the axis of the axis of the straight drum part 12 and 19 end of bent tube section it Between angle be 1-30 degree, such as 5-25 degree, 10-20 degree, about 15 degree.As above valve body 1 as defined in and exhaust outlet 11 are conducive to lead Piece 37 exports greasy dirt and smoothly disengaging exhaust outlet 11, is also beneficial to that flue gas is discharged into exhaust duct upwards by fire-preventing check valve.

When the fire-preventing check valve is mounted on vertical exhaust duct side wall, the valve block 3 by valve block shaft 31 with The valve body 1 is rotationally connected with the lower edge of the exhaust outlet 11；Preferably, the center of gravity of the valve block 3 is located at valve block shaft 31 The side of close valve body 1 upper or positioned at valve block shaft 31 or the side of the separate valve body 1 positioned at valve block shaft 31；It is excellent Selection of land, the side that the center of gravity of the valve block 3 is located at the close valve body 1 of valve block shaft 31 to cover the row when the valve block 3 The valve block 3 swings to the exhaust outlet 11 under the effect of gravity when port 11, is conducive to keep 3 couples of valve block rows at the time of emergency The closed state of port 11.

When the valve block 3 is opened, gap 7 described in 37 block of guide card between valve block 3 and the exhaust outlet 11 At least partly；Preferably, the gap 7 described in 37 block of guide card between valve block 3 and the exhaust outlet 11 from the exhaust The lower edge of mouth 11 is to the guide card 37 in the respective highest point 372 in 371 left and right sides part of first part's guide card；It is preferred that Ground, the portion no more than 7 center of valve block in the gap 7 described in 37 block of guide card between valve block 3 and the exhaust outlet 11 Point.When valve block 3 is opened, 37 block of the guide card lower half portion in gap 7 is beneficial to prevent the air-flow from exhaust duct middle and lower part Fire-preventing check valve exhaust is interfered, the interference is, for example, that exhaust duct air-flow may generate flow-disturbing in exhaust ports and increase fire prevention The exhaust resistance of check-valves, or may flow backward and enter fire-preventing check valve.

The protrusion 38 for water conservancy diversion, the edge and the valve block of the protrusion 38 are additionally provided in the loop landing zones 39 3 inner surfaces connect, and the protrusion 3 has peak potion 381, the first spine 382, the second spine 383, third spine 384, the first slope Portion 385, the second slope portion 386 and third slope portion 387, the peak potion 381 are located at 3 center of middle part and valve block of the protrusion 3 Top, first spine 382 and the second spine 383 extend to two sides from the peak potion 381 and are connected on the inside of the valve block Surface, third spine 384 extend downwardly from the peak potion 381 and are connected on the valve block inner surface, first slope portion 385 It is connected on the inner surface of the first spine 382, the second spine 383 and the valve block 3, second slope portion 386 is connected on first The inner surface of spine 382, third spine 384 and the valve block 3, third slope portion 387 are connected on the second spine 383, The inner surface of three spines 384 and the valve block 3；Preferably, 3 middle part of valve block is formed by bending to the direction far from valve body 1 Recess portion, and the protrusion 38 is located at the middle part of the recess portion；Preferably, the inner surface of the protrusion 38 and the valve block 3 Between form cavity；Preferably, plane where the edge of the prominent institute's valve block 3 of the peak potion 381, and the height of protrusion is not Greater than the thickness of the cavity.As above protrusion 38 as defined in can guide the air-flow from valve body 1 along each slope portion to two sides and Top flowing, to reduce the windage of the generation of valve block 3.

Gathering for valve block and exhaust ports greasy dirt can be effectively prevented in the above-mentioned fire-preventing check valve of the utility model, reduces row Atmidometer and the interference for avoiding air-flow in exhaust duct.

Refering to fig. 1-11, the other side of the utility model provides a kind of fire-preventing check valve, including the first retaining mechanism With the second retaining mechanism, first retaining mechanism and the second retaining mechanism are used to that valve block be prevented to open each independently.

Specifically, the fire-preventing check valve with valve block retaining mechanism of the utility model, including with exhaust outlet 11 Valve body 1 and the valve block 3 being covered at exhaust outlet 11, valve block 3 have valve block connecting plate 36 and valve block shaft 31, and valve block shaft 31 can It is rotationally connected with the valve block positioning region 34 being fixed on valve body 1 by fixed frame 14, valve block is arranged in valve block shaft 31 and closes Spring 32 is closed, the upper surface of one end abutting valve block 3 of valve block closing spring 32 or valve block connecting plate 36 and the other end push against valve Piece positioning region 34 is to oppress valve block 3 to exhaust outlet 11.When the fire-preventing check valve is in exhaust condition, pass through exhaust outlet 11 Air-flow can blow and open valve block 3, valve block 3 around the rotatable maximum angle of valve block shaft 31 can be 40,45,50,55 or 60 degree, preferably 45 degree.

The fire-preventing check valve further includes temperature sensing element 2.The fixing end of the temperature sensing element 2 passes through 34 He of valve block positioning region Fixed frame 14 is fixed on the valve body 1, and the free end of the temperature sensing element 2 is hook portion.In some cases, temperature sensing element 2 By hot melt piece connection between fixing end and free end, hot melt piece can be setting of being heated in the case where being equal to or higher than its operating temperature The fuse metal piece of fusible disconnection after time or other hot melt material pieces.In other cases, the hook portion of temperature sensing element 2 by Memorial alloy or bimetal leaf are made, and after heated setting time shape can occur for the hook portion in the case where being equal to or higher than its operating temperature Become and straighten, and shape can be restored when being lower than its operating temperature.The operating temperature and setting time can be according to fire prevention The working environment of check-valves and the conventional regulation of related fields and requirement arbitrarily determine, for example, the operating temperature can be example Such as 70,80,90,100,110,120,130,140,150,160,170,180,190,200 degrees Celsius or higher, preferably 70 is Celsius Degree, the setting time can be such as 5,10,20,30,40,50,60 seconds or longer, preferably 10 seconds；And the hot molten gold Belong to piece or other hot melt material piece, memorial alloy or bimetal leafs are known commercial product, it can be according to the operating temperature It is selected with setting time.

First retaining mechanism includes compression bar 41 and compression bar positioning region 42, and the compression bar positioning region 42 passes through fixed frame 14 It is fixedly connected on valve body 1；The compression bar shaft 412 substantially vertical with compression bar 41 is connected in the connecting pin of the compression bar 41, it is described Compression bar shaft 412 is rotationally connected with compression bar positioning region 42 and the compression bar 41 is made to have first position and the second position.Such as Fig. 1 institute Show, when the compression bar 41 is in first position, the compression bar 41 be located at 3 switching station of valve block process the first track it Outside, so that first retaining mechanism is unlocked, allow by the blowing valve block 3 of exhaust outlet 11 and around valve block Shaft 31 rotates.When the compression bar 41 is in the second position, the pressure unit 411 positioned at 41 free end of compression bar is oppressed described Oppression department 35 on 3 center outer surface of valve block, so that the valve block 3 is closed at the exhaust outlet 11 and first retaining mechanism In locking state, even if there is the gas pressure from smoke exhaust ventilator or exhaust fan in valve body 1 at this time, valve block 3 will not be opened, from And prevent high-temperature gas or flare outside valve body 1 from entering the inside of valve body 1.

First retaining mechanism further includes the compression bar rotation spring 43 as the first elastic element, compression bar rotation spring 43 One end be connected to the compression bar positioning region 42 and the other end is connected to compression bar 41 to apply compression bar 41 towards the oppression department 35 pressure.In some cases, compression bar positioning region 42 has the first limit plate 422 and the second limit plate 423, compression bar shaft 412 pass through and are determined by the second limit hole 427 on the first limit hole 426 and the second limit plate 423 on the first limit plate 422 Position, compression bar rotation spring 43 are socketed in the part in compression bar shaft 412 between first limit plate 422 and the second limit plate 423.Pressure The other end of bar rotation spring 43 also applies the pressure towards compression bar positioning region 42 to compression bar 41, and compression bar 41 is compressed and positioned On compression bar positioning region 42, to avoid compression bar shaft 412 along axial play, improve the stability of the rotation of compression bar 41 and Compression bar 41 is improved to the pressure of oppression department 35.

When the temperature sensing element 2 is in the environment lower than its operating temperature, the temperature sensing element 2 is in undeformed the One state and stop the compression bar 41, such as catch on compression bar 41 with its hook portion, so that first retaining mechanism keeps unlocked Tight state.When the temperature sensing element 2, which is in, is equal to or higher than its operating temperature, the temperature sensing element 3 is changed into the of deformation Two-state (such as the melting of fuse metal piece disconnects or bimetal leaf hook portion is stretched) is to discharge the compression bar 41, so that the pressure Bar 41 rotates up to the pressure unit 411 around the compression bar shaft 412 under the driving of compression bar rotation spring 43 and oppresses the pressure Compel portion 35 and first retaining mechanism is made to enter locking state.

In some cases, when the compression bar rotation spring 43 driving rotation of compression bar shaft 412 makes the compression bar 41 from the When one position is moved to the second position, the first plane where the motion track of the pressure unit 411 is being closed with the valve block 3 When the exhaust outlet 11 it is vertical with 11 axis of exhaust outlet and pass through between the second plane of the oppression department 35 first folder Angle is greater than 0 degree, for example, 2-8 degree, preferably 3-6 degree, more preferably from about 5 degree, and the friendship of the compression bar shaft 412 and the second plane Point the pressure unit 35 between line and the compression bar shaft 412 axis between the projection in the second plane second Angle is greater than 0 degree, for example, 2-8 degree, preferably 3-6 degree, more preferably from about 5 degree.Using the compression bar shaft 412 of such sloped position, When compression bar 41 is in first position, pressure unit 411 can be made farther away from the position of valve block 3, to allow valve block 3 around valve block Shaft 31 rotates greater angle, in favor of improving the air quantity being discharged from exhaust outlet 11 or reducing its wind pressure or windage, and when pressure When bar 41 is in the second position, pressure unit 411 can be made to apply bigger pressure, the closer closing of valve block 3 row to oppression department 35 Thus port 11 further improves the effect of fire-preventing check valve fire-proof smoke insulation.

In some cases, locating recesses are equipped in the oppression department 35, the pressure unit 411 is equipped with protrusion, when described When first retaining mechanism is in locking state, the recess is with protrusion cooperation so that the protrusion is limited to the recess In, prevent pressure unit 411 from sliding off oppression department 35 on valve block 3 with this.For example, the protrusion is curved towards valve block by compression bar 11 It is curved at the recess is formed from valve block 3 to 1 inner recess of valve body.In some cases, exhaust outlet 11 is circle, and valve block 3 is The circle that is adapted to exhaust outlet 11 and there is concentric ripple glaze, increases the intensity of valve block 3 with this, avoid processing and use Deformation in journey；The oppression department 35 is located at the center of valve block 3, can apply essentially identical pressure to the periphery of valve block 3, Improve valve block 3 to the sealing effect of exhaust outlet 11 with this.

In some cases, one end of the separate compression bar 41 of the compression bar shaft 412 is equipped with the first positioning pin 413 and covers It is connected to moving casing 45；The side wall of the moving casing 45 is equipped with positioning cotter way 451 so that the first positioning pin 413 is limited in positioning In cotter way 451, so that the moving casing 451 is only capable of the axial movement along compression bar shaft 412, and cannot be around compression bar shaft 412 Rotation；One end of the separate compression bar 41 of the moving casing 45 be equipped with positioning tongue 452, the compression bar positioning region 42 be additionally provided with It is described to position the third limit hole 428 that tongue 452 cooperates only to allow positioning tongue when the compression bar 41 is in the second position Portion 452 is inserted into third limit hole 428 and compression bar shaft 412 is prevented to rotate.The positioning tongue 452 and third limit hole 428 The shape of cross section cooperates and prevents the positioning tongue 452 from rotating in third limit hole 428.Such as positioning tongue 452 and the cross section of third limit hole 428 can be semicircle.

In some cases, the moving casing 56 is between the second limit plate 427 and third limit plate 428, and The first retaining spring 44 being socketed in compression bar shaft 412 is equipped between the second limit plate 427 and moving casing 56, first is fixed Position spring 44 is in the oppression state so that moving casing 56 is pressed to third limit plate 428.

In some cases, the fire-preventing check valve with valve block retaining mechanism further includes alarm device, the alarm The contact switch 91 of device is fixed on the contact switch positioning region 425 on compression bar positioning region 42, and is located at third limit hole At 428, so that the positioning tongue 452 oppresses contact switch 91 when the positioning tongue 452 is inserted into third limit hole 428 So that the alarm device issues alarm signal, so that user knows that the first retaining mechanism is in locking state.The alarm letter Number it can be any appropriate light, image, text or voice signal.Particularly advantageous, when fire does not occur, the alarm Compression bar 41 caused by signal can notify at once because of failure or accident is in the event of the second position, and user is reminded to find in time simultaneously It is handled.

In some cases, the fire-preventing check valve with valve block retaining mechanism further includes the second retaining mechanism, described Second retaining mechanism includes bar 51 and bar positioning region 53, and the bar positioning region 53 is fixed on valve body 1 by valve seat 13, The bar 51 is rotatably connected at bar positioning region 53 and the bar 51 is made to have the third place and the 4th position；It is described One end of valve block shaft 31 is equipped with valve block rotating shaft winch 33 as the retainer for limiting the rotation of valve block shaft 31.When the gear When bar 51 is in the third place, the bar 51 is in valve block 3 and is opened and closed turn that process middle valve plate shaft 31 drives crank 33 to rotate To allow valve block shaft 31 to rotate except dynamic rail mark, so that the second retaining mechanism is unlocked.When the bar 51 in the 4th position and when valve block 3 is in closed state (state for closing exhaust outlet 11), and the bar 51 is in valve block 3 and opens It closes within the rotary motion trace that process middle valve plate shaft 31 drives crank 33 to rotate and the valve block shaft 31 is stopped to rotate, so that Second retaining mechanism is in locking state.By the way that the second retaining mechanism is arranged, it can be advantageous to user be allowed arbitrarily to hinder at any time Only valve block 3 is opened, to close exhaust outlet 11.For example, the second retaining mechanism can be placed in locking when room is vacant for a long time State closes exhaust outlet 11, it is ensured that realizes fire-proof smoke insulation effect.Since the second retaining mechanism can be mutual with the first retaining mechanism Independently working, user can arbitrarily be locked by the second retaining mechanism without operating the first retaining mechanism or discharge valve block 3, by This ensures that the first retaining mechanism moment was in the state of response fire.

In some cases, second retaining mechanism further includes bar shaft 52 and fixed sleeving 56, the bar 51 It is fixed on one end of bar shaft 52 and is rotatablely connected by bar shaft 52 and bar positioning region 53, the fixed sleeving 56 is logical It crosses valve seat 13 to be fixed on valve body 1, the other end of the bar shaft 56 penetrates rotatably fixed sleeving 56, and the bar turns Axis 52 is equipped with the second positioning pin 521, and the fixed sleeving 56 enters circumferentially arranged with the second positioning pin 521 of permission and limits gear The first locating notch 561 and the second locating notch 562 of bar shaft rotation；When the second positioning pin 521 enters the first locating notch When 561, the bar 51 is in the third place；When the second positioning pin 521 enters the second locating notch 562, at the bar In the 4th position.

In some cases, bar positioning region 53 is in the side towards exhaust duct of valve seat 13, bar shaft 52 it is another End penetrates rotatably valve seat 13 and is fixed with bar knob 54；And the second retaining spring 55 is additionally provided in bar shaft 52 For oppressing the second positioning pin 521 to the first locating notch 561 or the second locating notch 562.Can have by bar knob 54 User-friendly second retaining mechanism sharply.

The application method of the fire-preventing check valve with valve block retaining mechanism, comprising:

Step S100, when the temperature of 2 local environment of temperature sensing element rises to the operating temperature equal to or higher than temperature sensing element 2 When, the temperature sensing element 2 is changed into the second state of deformation from undeformed first state and discharges the compression bar 41, described Compression bar 41 under the driving of compression bar rotation spring 43 around the compression bar shaft 412 rotate up to the pressure unit 411 oppress it is described The oppression department 35 of valve block 3, so that the valve block 3 closes the exhaust outlet 11 and locks first retaining mechanism never State is changed into locking state；

Preferably, when the compression bar shaft 412 rotation makes the compression bar 41 turn to the second position from first position, institute The first plane where the motion track of pressure unit 411 and the valve block 3 are stated when closing the exhaust outlet 11 and the exhaust 11 axis of mouth are vertical and are greater than 0 degree, for example, 2-8 degree by the first angle between the second plane of the oppression department 35, excellent 3-6 degree, more preferably from about 5 degree are selected, and between the compression bar shaft 412 and the intersection point and the pressure unit 411 of the second plane The second angle of line and the axis of the compression bar shaft 412 between the projection in the second plane is greater than 0 degree, for example, 2-8 Degree, preferably 3-6 degree, more preferably from about 5 degree；

Preferably, described when the compression bar shaft 412 rotation makes the compression bar be moved to the second position from first position Positioning tongue 452 also rotates with it, and when the compression bar 41 is in the second position, the positioning tongue 452 is inserted into third Limit hole 428 is to prevent compression bar shaft 412 from rotating and the first retaining mechanism is made to be maintained at locking state；

Preferably, first retaining spring 44 oppresses the positioning tongue 452 and is inserted into third limit hole 428；

Preferably, when the positioning tongue 452 is inserted into third limit hole 428, the compressing of the positioning tongue 452 alarm dress The contact switch 91 set is so that the alarm device issues alarm signal；

Preferably, the method also includes step S200, when the temperature of temperature sensing element 2 local environment is lower than temperature sensing element 2 Operating temperature when, the temperature sensing element 2 is set to undeformed first state, compressing compression bar rotation spring 43 makes described Compression bar 41 rotates up to the temperature sensing element 2 around the compression bar shaft 412 and stops the compression bar 41, so that first lock Tight mechanism is unlocked；

Preferably, step S200 further include: positioning tongue 452 is extracted into third limit hole 428, then oppresses compression bar rotation Spring 43 rotates the compression bar 41 around the compression bar shaft 412；

Preferably, the method also includes step S300, when the bar 51 is in the third place and valve block 3 is in and closes When conjunction state, 51 to the 4th position of bar is rotated to stop the valve block shaft 31 to rotate, so that at the second retaining mechanism In locking state；

Preferably, step S300 further include: mobile bar shaft 52 is along its axis when the bar 51 is in the third place To movement so that the second positioning pin 521 leaves the first locating notch 561, then rotating bar shaft 52 reaches the bar 51 4th position then moves bar shaft 52 and the second positioning pin 521 is made to enter the second locating notch 562；

Preferably, the method also includes step S400, when the bar 51 is in the 4th position and valve block 3 is in and closes When conjunction state, the bar 51 is rotated to the third place to allow the valve block shaft 31 to rotate, so that at the second retaining mechanism In non-locking state；

Preferably, step S400 further include: push bar shaft 52 along its axis when the bar 51 is in four positions To movement so that the second positioning pin 521 leaves the second locating notch 562, then rotating bar shaft 52 reaches the bar 51 The third place then moves bar shaft 52 and the second positioning pin 521 is made to enter the first locating notch 561；

Preferably, in step S300 and/or step S400, using the second retaining spring 55 along the axial direction of bar shaft 52 The compressing of second positioning pin 521 is entered into the first locating notch 561 and/or the second locating notch 562；

Preferably, in step S300 and/or step S400, using bar knob 54 along the axial movement of bar shaft 52 Bar shaft 52 makes the second positioning pin 521 leave the first locating notch 561 or the second locating notch 562；Preferably, using gear Bar knob 54 rotates bar shaft 52.

It in some cases, further include that setting exists in each embodiment of the fire-preventing check valve of above-mentioned the utility model Rectification shield 16 on valve seat 13, when fire-preventing check valve installation is with vertical exhaust duct side wall, rectification shield 16 is in band Shape and both ends are connected to the left and right sides of 13 upper valve body 1 of valve seat, surround valve block 3 so that rectification shield 16 is horizontal and appoint Choosing the first retaining mechanism and the second retaining mechanism, rectification shield 16 allow with valve block 3 at a distance from valve block 3 around valve block shaft 31 oneself At least 40 degree are rotated to the direction far from exhaust outlet 11 positioned at the position of exhaust outlet 11, for example, at least 45 degree, at least 50 degree, at least 60 degree etc..The lower end for rectifying the separate valve seat 13 of shield 16 can be bent inclination (tightening) to 13 direction of valve seat and to rectify with this Shield 16 forms the streamlined contour for being similar to inversed taper platform shape that lower ending opening is less than upper end opening, is conducive to reduce fire prevention non-return Valve is conducive to exhaust when flue gas is discharged to exhaust duct in fire-preventing check valve to the resistance of gas flowing and disturbance in exhaust uptake The reduction of resistance.

In some cases, it is additionally provided with fixing clamp on valve seat 13, for fire-preventing check valve to be installed on to the side wall of exhaust duct On exhaust outlet at.

In some cases, it is additionally provided with strainer 17 in the air hose of one end of the separate exhaust outlet 11 of valve body 1, to filter in advance Except the pollutants such as greasy dirt in the flue gas for entering valve body 1.In some cases, the valve body 1 between strainer 17 and exhaust outlet 11 On be additionally provided with gas-detecting device, for monitoring the air pressure and pollutant kind and content of the flue gas after the filtering of strainer 17, with this The filter capacity and stopping state of strainer 17 are judged, to remind user to carry out timely more when strainer 17 blocks or fails It changes.In some cases, one end of the separate exhaust outlet 11 of valve body 1 is also connected with blast connection 18 for connecting smoke exhaust ventilator Or the exhaust equipments such as air exhauster.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (8)

1. a kind of fire-preventing check valve, including the valve body with exhaust outlet and the valve block for covering the exhaust outlet, the valve block Inside circumference there are loop landing zones for being sealingly engaged the exhaust outlet, which is characterized in that the interior lateral edge of the valve block The guide card at least partly connecting oriented valve inner and extending of the internal edge of the loop landing zones.

2. the fire-preventing check valve according to claim 1, which is characterized in that when the fire-preventing check valve is mounted on vertical row On air flue side wall and when the valve block covers the exhaust outlet, it is attached at least to the minimum of the internal edge of the loop landing zones Partial first part's guide card diagonally descends direction to extend into valve inner.

3. the fire-preventing check valve according to claim 1, which is characterized in that when the fire-preventing check valve is mounted on vertical row On air flue side wall and when the valve block covers the exhaust outlet, only connect in the lower half portion of the internal edge of the loop landing zones It is connected to the guide card.

4. the fire-preventing check valve as claimed in one of claims 1-3, which is characterized in that when the valve block covers the row When port, the maximum length that the guide card extends into valve inner is no more than the 120% of the radius of the valve block.

5. the fire-preventing check valve as claimed in one of claims 1-3, which is characterized in that when the fire-preventing check valve is installed When on vertical exhaust duct side wall, the upper limb of the exhaust outlet is to exhaust duct sidewall slope.

6. the fire-preventing check valve as claimed in one of claims 1-3, which is characterized in that when the fire-preventing check valve is installed When on vertical exhaust duct side wall, the valve block is rotationally connected under the exhaust outlet by valve block shaft and the valve body At edge.

7. the fire-preventing check valve as claimed in one of claims 1-3, which is characterized in that when the valve block is opened, institute State gap between valve block described in guide card block and the exhaust outlet at least partly.

8. the fire-preventing check valve as claimed in one of claims 1-3, which is characterized in that in the loop landing zones also Equipped with protrusion, the edge of the protrusion connects with the valve block inner surface, and the protrusion has peak potion, spine and slope portion, institute State the middle part that peak potion is located at the protrusion, the spine has multiple and respectively since the peak potion extends and is connected on the valve block Inner surface, the slope portion, which has, multiple is respectively connected on adjacent Liang Ge spine and the valve block inner surface.