CN102287557A

CN102287557A - Double-shaft smoke discharge fire prevention check valve

Info

Publication number: CN102287557A
Application number: CN2011102279491A
Authority: CN
Inventors: 秦先军
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-10
Filing date: 2011-08-10
Publication date: 2011-12-21

Abstract

The invention discloses a double-shaft smoke discharge fire prevention check valve, which is used for discharging smoke, preventing fire and preventing smoke from clustering in public smoke discharge flues of houses. The check valve comprises a valve body, a valve sheet and an execution mechanism, wherein the valve sheet is arranged vertical to the horizontal plane when the valve is closed. The check valve is characterized in that: the valve sheet is provided with an upper rotating shaft and a lower rotating shaft; the upper rotating shaft is hinged with the lower rotating shaft through a C-shaped connecting piece; and the axle center of the upper rotating shaft is positioned at the offset angle of 10 DEG towards one side of a smoke inlet by using the gravity center of the valve sheet in the closing state as a circular point. Due to the adjustment of the positions and the quantity of the rotating shafts, the conventional method that a sealing ring of the valve body is required to be manufactured into an inclined plane can be eliminated to ensure that the valve sheet applies pressure onto the sealing ring.

Description

A kind of twin axle smoke evacuation fire-preventing check valve

Technical field

Present technique relates to the anti-smoke blowing frpf safety check of discharging fume that is used to of house kitchen toilet public smokejack system.

Background technique

At present most areas, whole nation smoke evacuation safety check of all requiring to be used for public smokejack system possesses fire-proof function, existing fire-preventing check valve mainly is made up of valve body, valve block and fire prevention actuator, the valve body rotating shaft is general all in the middle and upper part of valve block, also is simultaneously to be in in the mouth.Successfully cover the mouth that advances of valve body when making valve block rely on gravity to fall, must advance mouth to valve body and make an inclined-plane, then scarf weld is connected on the valve body, so not only processing on more complicated, and be difficult to find best rotating shaft position, if rotating shaft position be not fine its sealing effect will be very undesirable.Actuator does not generally possess reset function in the prior art in addition.There is great defective in therefore existing braking technique.

Summary of the invention

The objective of the invention is by countershaft position and actuator be optimized improve provide a kind of have rotate flexibly, favorable sealing property, possess the high fire-preventing check valve of reset function reliability.

Technological scheme of the present invention is a kind of twin axle smoke evacuation fire-preventing check valve, comprises valve body, valve block and actuator.Described valve body has into mouth and smoke outlet, is advancing between mouth and the smoke outlet to be provided with seal ring, and described seal ring is perpendicular to horizontal plane.Described valve block and actuator all are positioned at valve seals smoke outlet one side.Described valve block is provided with rotating shaft and two rotating shafts of lower rotary shaft, and last rotating shaft is carried out hinge type with lower rotary shaft by C shape link and is connected.Describedly go up that rotating shaft is positioned at valve block top margin top and deflection is advanced mouth one side, be fixed on the valve body by rolling up justify into figure six and with screw or spot welding, the center of gravity the when axle center of last rotating shaft is in and closes with valve block is that round dot court advances mouth one lateral deviation and moves 10 ° of positions.Lower rotary shaft is positioned at valve block top margin bottom towards advancing mouth one side, is fixed on the valve block by rolling up to justify into figure six and with screw or spot welding.Described C shape link two ends are circular arc, and last circular arc is enclosed within the rotating shaft and with last rotating shaft diameter and matches, and can rotate around last rotating shaft, and following circular arc is enclosed within on the lower rotary shaft and with the lower rotary shaft diameter and matches, and lower rotary shaft can be around circular arc rotation down.

Described actuator is positioned at the top of seal ring and is made up of torsion spring, temperature sense pad and " L " shape drag hook.Described torsion spring one end is that fixed end is V-shaped, at the bottom position of " V " shape torsion spring is fixed on seal ring by smoke outlet one side by screw, the other end of torsion spring is that movable end is Chinese-character stroke " cross break crotch " shape, the position of its " hook " is in into mouth one side above seal ring under free state, big central position about seal ring.Temperature sense pad is made by low melting alloy, and temperature sense pad can melt after ambient temperature reaches setting temperature.Described " L " shape drag hook is provided with a groove, described groove is inserted on the screw, on screw, penetrate temperature sense pad again, can be fixed on " L " shape drag hook on the seal ring by nut again, the hook of described " L " shape drag hook can hook the movable end of torsion spring at this moment, make torsion spring be in tensioned state, and be in above position, valve block top.Temperature sense pad fusing back " L " shape drag hook just can become flexible and can't hook the movable end of torsion spring again after ambient temperature reaches setting temperature, and the movable end of torsion spring just can reverse towards the central position of seal ring, reaches the effect that valve block is closed valve block by force that pushes against.

Compared with prior art the present invention can not only ensure and successfully discharge oil smoke and can in time close fire-closing valve separation safety check to stop spreading of fire when fire takes place, and reduces the loss that fire causes as much as possible.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is a rear view of the present invention;

Fig. 3 is the sectional view of Figure 1A-A, (1) valve body wherein, (2) valve block, (3) actuator, (4) advance mouth, (5) smoke outlet, (6) seal ring, (7) go up rotating shaft, (8) lower rotary shaft, (9) C shape link, (10) go up circular arc, and (11) are circular arc down, (12) torsion spring, (13) temperature sense pad, (14) " L " shape drag hook, (15) fixed end, (16) movable end.

Embodiment

Technological scheme of the present invention is a kind of shaft type smoke evacuation fire-preventing check valve, comprises valve body 1, valve block 2 and actuator 3.Described valve body 1 has into mouth 4 and smoke outlet 5, is advancing between mouth 4 and the smoke outlet 5 to be provided with seal ring 6, and described seal ring 6 is perpendicular to horizontal plane.Described valve block 2 and actuator 3 all are positioned at valve seals 6 smoke outlets 5 one sides.Described valve block 1 is provided with rotating shaft 7 and 8 two rotating shafts of lower rotary shaft, and last rotating shaft 7 is carried out hinge type with lower rotary shaft 8 by C shape link 9 and is connected.Described upward rotating shaft 7 is positioned at valve block 2 top margin tops and deflection is advanced mouth 4 one sides, be fixed on the valve body 1 by rolling up to justify into figure six and with screw or spot welding, the center of gravity the when axle center of last rotating shaft 7 is in valve block 2 closed conditions is that round dot moves 10 ° of positions towards advancing mouth 4 one lateral deviations.Lower rotary shaft 8 is positioned at valve block 2 top margin bottoms towards advancing mouth 4 one sides, is fixed on the valve block by rolling up to justify into figure six and with screw or spot welding.Described C shape link 9 two ends are circular arc, last circular arc 10 is enclosed within the rotating shaft 7 and with last rotating shaft diameter and matches, can rotate around last rotating shaft 7, following circular arc 11 is enclosed within on the lower rotary shaft 8 and with the lower rotary shaft diameter and matches, and lower rotary shaft 8 can be around circular arc 11 rotations down.

Described actuator 3 is positioned at the top of seal ring 6 and is made up of torsion spring 12, temperature sense pad 13 and " L " shape drag hook 14.Described torsion spring 12 1 ends are that fixed end 15 is V-shaped, at the bottom position of " V " shape torsion spring 12 is fixed on seal ring 6 by smoke outlet 5 one sides by screw, the other end of torsion spring 12 is that movable end 16 is Chinese-character stroke " cross break crotch " shape, the position of its " hook " is in into mouth 5 one sides above seal ring 6 under free state, big central position about seal ring 6.Temperature sense pad 13 is made by low melting alloy, and temperature sense pad 13 can fusing after ambient temperature reaches setting temperature.Described " L " shape drag hook 14 is provided with a groove, described groove is inserted on the screw, on screw, penetrate temperature sense pad 13 again, can be fixed on " L " shape drag hook 14 on the seal ring 6 by nut again, the hook of described " L " shape drag hook 14 can hook the movable end 16 of torsion spring at this moment, make torsion spring 12 be in tensioned state, and be in above position, valve block 2 tops.Temperature sense pad 13 fusing back " L " shape drag hooks 14 just can become flexible and can't hook the movable end 16 of torsion spring again after ambient temperature reaches setting temperature, the movable end 16 of torsion spring just can be torqued into free state towards the central position of seal ring 6, reaches the effect that valve block 2 is closed valve block 2 by force that pushes against.

Claims

1. twin axle smoke evacuation fire-preventing check valve, be used for the anti-smoke blowing of the public smokejack smoke evacuation of dwelling house fire prevention, comprise valve body, valve block, actuator, valve in off position the time valve block perpendicular to horizontal plane, it is characterized in that valve block is provided with, following two rotating shafts, last rotating shaft is carried out hinge type with lower rotary shaft by C shape link and is connected, center of gravity when the axle center of last rotating shaft is in the valve block closed condition is that round dot moves 10 ° of positions towards advancing mouth one lateral deviation, lower rotary shaft is positioned at valve block top margin bottom towards advancing mouth one side, be fixed on the valve block by rolling up to justify into figure six and with screw or spot welding, described C shape link two ends are circular arc, last circular arc is enclosed within the rotating shaft and with last rotating shaft diameter and matches, can rotate around last rotating shaft, following circular arc is enclosed within on the lower rotary shaft and with the lower rotary shaft diameter and matches, and lower rotary shaft can be around circular arc rotation down.

2. according to the described a kind of twin axle smoke evacuation fire-preventing check valve of claim 1, described actuator is positioned at the top of seal ring, it is characterized in that actuator is by torsion spring, temperature sense pad and " L " shape drag hook are formed, described torsion spring one end is that fixed end is V-shaped, at the bottom position of " V " shape torsion spring is fixed on seal ring by smoke outlet one side by screw, the other end of torsion spring is that movable end is Chinese-character stroke " cross break crotch " shape, the position of its " hook " is in into mouth one side above seal ring under free state, big central position about seal ring, temperature sense pad is made by low melting alloy, described " L " shape drag hook is provided with a groove, described groove is inserted on the screw, on screw, penetrate temperature sense pad again, can be fixed on " L " shape drag hook on the seal ring by nut again, the hook of described " L " shape drag hook can hook the movable end of torsion spring at this moment, makes torsion spring be in tensioned state, and is in above position, valve block top.