CN202719235U

CN202719235U - Flue check valve

Info

Publication number: CN202719235U
Application number: CN201220416840.2U
Authority: CN
Inventors: 谢庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-21
Filing date: 2012-08-21
Publication date: 2013-02-06
Anticipated expiration: 2022-08-21

Abstract

The utility model discloses a flue check valve. A fireproof device arranged inside the flue check valve comprises a fixed support, a press rod and a fuser unit, wherein the press rod is rotatably arranged at one end of the fixed support through a rotary shaft, the fuser unit is placed at the other end of the fixed support, and the shaft axis of the rotary shaft and the plane where a valve block is placed form an acute angle. The rotary shaft is provided with a torsional spring in sleeved mode, two ends of the torsional spring respectively abut against the fixed support and the press rod, the fuser unit comprises a fixed piece and a stop piece which are welded together, when the fireproof device is placed at the first work state, the torsional spring is pressed, and the stop piece abuts against the outer end portion of the press rod. When the fireproof device is in the second work state, the stop piece is not weld with the fixed piece in separating mode, and the outer end portion of the press rod abuts against the valve block. When hot fume exhausted by a public exhausting pipeline achieves a certain temperature, the fixed piece and the stop piece are fused, the press rod rotates rapidly and pushes the valve block to rotate to enable the valve block to be covered on the port portion of an air outlet, and therefore the air outlet is sealed to prevent the hot fume form entering into houses of residents.

Description

Check valve for flue

Technical field

The utility model relates to a kind of check valve for flue.

Background technique

Check valve for flue generally is usually used in the smoke exhaust pipe of range hood road of family, and the oil smoke in kitchen drains in the check valve by cooker hood, is drained in vertical flue in the building by check valve for flue again.In the prior art, check valve for flue comprises shell, is arranged at the fume pipeline in the shell, the two ends of fume pipeline offer respectively intake grill and exhaust outlet, the exhaust outlet place is provided with valve block rotationally, when kitchen ventilator is not discharged fume, rely on the valve block self gravitation to cover at the exhaust outlet place, when kitchen ventilator is discharged fume, valve block is opened, and exhaust outlet communicates with gas exhaust duct.At present, for multi-user's building, be generally the public gas exhaust duct of a plurality of users.If catch fire in one of them user family, the flue gas of heat can enter in the gas exhaust duct by check valve for flue, and the flue gas of heat enters in other user families along gas exhaust duct and by intake grill, other users is caused have a strong impact on.

Summary of the invention

The purpose of this utility model provides a kind of check valve for flue with refractory protection, this check valve for flue can be in gas exhaust duct its exhaust outlet of autoshutdown during excess Temperature, thereby stop the flue gas of heat in the gas exhaust duct to enter in the man of resident family.

For achieving the above object, the technical solution adopted in the utility model is: a kind of check valve for flue, comprise shell, be arranged at the oil smoke passage in the shell, the two ends of described oil smoke passage offer respectively intake grill, exhaust outlet, the oral area that is positioned at described exhaust outlet on the described shell is provided with valve block rotationally, described check valve also comprises refractory protection, described refractory protection comprises the fixed support that is fixedly installed on the described shell, be arranged on rotationally the depression bar of described fixed support one end by rotating shaft, the plane at the shaft axis of described rotating shaft and described valve block place is acute angle, be arranged with torsion spring in the described rotating shaft, conflict respectively at described fixed support in the two ends of described torsion spring, on the described depression bar, described refractory protection also comprises the heat melting device that is positioned at the described fixed support the other end, described heat melting device comprises the fixed plate that is fixedly installed on the described shell, the catch that is connected by molten melting welding liquid seam with described fixed plate, described refractory protection has the first working state and the second working state, when described refractory protection is in the first working state, described torsion spring is extruded, and described catch gear is on the outer end of described depression bar; When described refractory protection was in the second working state, described catch and described fixed plate broke away from seam, and the outer end of described depression bar is pressed on the described valve block.

Preferably, be provided with a location hook on the described depression bar, when described refractory protection was in the first working state, described location hook was hooked on the described catch.

Preferably, bottom surface, the described outer end side relative with described valve block of described depression bar outer end is arc surface.

Because the utilization of technique scheme, the utility model compared with prior art has following advantages: check valve for flue of the present utility model, be provided with refractory protection in this check valve for flue, when the flue gas of the heat of discharging in the public gas exhaust duct reaches uniform temperature, the phase seam connects on the heat melting device in the refractory protection fixed plate and catch are fused, depression bar just can rotate rapidly under the effect of the elastic-restoring force of torsion spring, the outer end of depression bar contacts with valve block and promotes valve block and rotates so that valve block covers the oral area at exhaust outlet, valve block continues rotation until till its outer end is pressed on the valve block, so just promptly seal exhaust outlet, stoped the flue gas of heat from gas exhaust duct, to enter in the man of resident family by the oil smoke passage.

Description of drawings

Accompanying drawing 1 is the main TV structure schematic diagram of check valve for flue of the present utility model, and wherein, refractory protection is in the first working state;

Accompanying drawing 2 is the left TV structure schematic diagram of check valve for flue of the present utility model;

Accompanying drawing 3 be in the accompanying drawing 2 A-A to the partial schematic diagram of sectional view;

Accompanying drawing 4 be in the accompanying drawing 2 B-B to the partial schematic diagram of sectional view.

Embodiment

Come the technical solution of the utility model is further elaborated below in conjunction with accompanying drawing and specific embodiment.

Referring to the check valve for flue shown in Fig. 1～4, this check valve for flue comprises shell 1, be arranged at the oil smoke passage in the shell, the two ends of oil smoke passage offer respectively intake grill 3 and exhaust outlet 4, the oral area that is positioned at exhaust outlet 4 on the shell 1 is provided with valve block 2 rotationally, valve block 2 generally has two working staties, be opening state and closed condition, when smokeless in the oil smoke passage is discharged, valve block 2 is in closed condition and relies on himself gravity to cover oral area at exhaust outlet 3, and when having flue gas to discharge in the oil smoke passage, valve block 2 is in open mode by the promotion of flue gas, and valve block 2 rotates and exposes exhaust outlet 4.

Shown in Fig. 1～4, the specialization of this check valve for flue is also to be provided with on this check valve for flue refractory protection.This refractory protection comprises the fixed support 5 that is fixedly installed on the shell 1, one end of fixed support 5 is provided with depression bar 6 rotationally, this depression bar 6 is arranged on the fixed support 5 rotationally by rotating shaft 8, the angle that the plane at the shaft axis of rotating shaft 8 and valve block 2 places is is acute angle, being arranged with torsion spring 9 in the rotating shaft 8, conflicts respectively on fixed support 5, depression bar 6 in the two ends of torsion spring 9.This refractory protection also comprises the heat melting device 7 that is arranged on fixed support 5 the other ends, and this heat melting device 7 comprises fixed plate 71 and catch 72, and fixed plate 71 is fixedly installed on the shell 1, and certainly, fixed plate 71 also can be arranged on the fixed support 5.Fixed plate 71 is connected with catch by molten melting welding liquid 73 phase seam connection, and when the temperature of heat melting device 7 reached certain value, molten melting welding liquid 73 can be melted, and at this moment fixed plate 71 and catch 72 just can break away from seam.Above-mentioned refractory protection has the first working state and the second working state, and when it was in the first working state, torsion spring 9 was extruded, and catch 72 gears are on the outer end of depression bar 6, and here the outer end of depression bar 6 refers to the movable end of depression bar 6.When this refractory protection was in the second working state, catch 72 broke away from seam with fixed plate 71, and the outer end of depression bar 6 is pressed on the valve block 2.

When this check valve for flue is in normal working, refractory protection remains on the first working state, and when the flue gas of the heat of discharging in the gas exhaust duct in the building reaches uniform temperature, refractory protection is heated and causes the melting welding liquid in the heat melting device 7 to melt, fixed plate 71 breaks away from seam with catch 72 and is connected, at this moment because the elastic-restoring force of torsion spring 9, depression bar 68 rotates relative to fixed support 5 rapidly around the shaft, in the process that depression bar 6 rotates, the outer end of depression bar 6 contacts with valve block 2 and promotes valve block 2 and rotates and cover oral area at exhaust outlet 4, depression bar 6 continues rotation until till its outer end is pressed on the valve block 2, so just promptly exhaust outlet 4 is sealed, stop the flue gas of heat from gas exhaust duct, to enter in the man of resident family by the oil smoke passage.

Shown in Fig. 1～4, in the present embodiment, be provided with a location hook 61 on the depression bar 6, this location hook 61 can be arranged on close its front end on the depression bar 6, and when refractory protection was in the first working state, this location hook 61 was hooked on catch 72.The bottom surface of depression bar 6 outer ends is arc surface, depression bar 6 outer ends and valve block 2 relative sides also are arc surface, like this, mobile cooperation place between the outer end of depression bar 6 and the valve block 2 is always circular arc, reduced the friction factor that cooperates, so that valve block 2 covers rapidly the oral area at exhaust outlet 4 under the promotion of depression bar 2.

Above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims

1. check valve for flue, comprise shell, be arranged at the oil smoke passage in the shell, the two ends of described oil smoke passage offer respectively intake grill, exhaust outlet, the oral area that is positioned at described exhaust outlet on the described shell is provided with valve block rotationally, it is characterized in that: described check valve also comprises refractory protection, described refractory protection comprises the fixed support that is fixedly installed on the described shell, be arranged on rotationally the depression bar of described fixed support one end by rotating shaft, the plane at the shaft axis of described rotating shaft and described valve block place is acute angle, be arranged with torsion spring in the described rotating shaft, conflict respectively at described fixed support in the two ends of described torsion spring, on the described depression bar, described refractory protection also comprises the heat melting device that is positioned at the described fixed support the other end, described heat melting device comprises the fixed plate that is fixedly installed on the described shell, the catch that is connected by molten melting welding liquid seam with described fixed plate, described refractory protection has the first working state and the second working state, when described refractory protection is in the first working state, described torsion spring is extruded, and described catch gear is on the outer end of described depression bar; When described refractory protection was in the second working state, described catch and described fixed plate broke away from seam, and the outer end of described depression bar is pressed on the described valve block.

2. check valve for flue according to claim 1, it is characterized in that: be provided with a location hook on the described depression bar, when described refractory protection was in the first working state, described location hook was hooked on the described catch.

3. check valve for flue according to claim 1, it is characterized in that: the bottom surface of described depression bar outer end, the side relative with described valve block, described outer end are arc surface.