CN111140685B

CN111140685B - Smoke-discharging fire-proof valve

Info

Publication number: CN111140685B
Application number: CN202010009151.9A
Authority: CN
Inventors: 李润凡
Original assignee: Bairui Runxing Beijing Technology Development Co ltd
Current assignee: Bairui Runxing Beijing Technology Development Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2022-05-06
Anticipated expiration: 2040-01-06
Also published as: CN111140685A

Abstract

The invention discloses a smoke-discharging fire-proof valve, which comprises a shell, a valve body and a valve locking mechanism, wherein the shell is provided with a valve body; the valve body is provided with two air ports in bilateral symmetry, the plane top ends of the air ports are outwards inclined to the horizontal plane, and the inner side of the valve body is provided with two air port cover plates which correspond to the air ports and rotate around the central rotating shaft; constitute by base, hasp, lock valve torsional spring and two lock valve rods, the hasp will be two lock valve rod lock is in the casing middle part, and the hasp is by two low temperature solder welding for the locking plate, the hasp is because of high temperature disconnection back, lock valve torsional spring drive lock valve rod is rotatory to controlling both sides by the middle part, and lock valve rod top is rotatory to the lock valve point that is close to wind gap lid board outer fringe, makes the wind gap apron lock at the wind gap. When the temperature of the external flue of the smoke-discharging fire-proof valve exceeds a threshold value, the locking sheet is welded, the locking valve rod is released, the locking valve rod is opened under the action of the reset spring, and the valve is forcibly closed and effectively locked; so that the protection effect is more reliable.

Description

Smoke-discharging fire-proof valve

Technical Field

The invention relates to the technical field of flues, in particular to a smoke exhaust fireproof valve.

Background

The smoke-discharging fire-proof valve is opened during smoke discharging, so that the smoke is conveniently discharged from the inner space by the discharging fan; when the external flue is on fire, the valve is closed, and external open fire is prevented from entering the special valve of the internal space from the flue. At present, the smoke discharge fire damper has various types and various adopted protection forms, but has improvement.

Disclosure of Invention

The invention aims to provide a smoke-discharging fire-proof valve which has novel and unique structure, is convenient to use and can reliably protect; the specific technical scheme is as follows:

a smoke-discharging fire-proof valve comprises a shell, a valve body and a valve locking mechanism; the valve body is provided with two air ports in bilateral symmetry, and the inner side of the valve body is provided with two air port cover plates which correspond to the air ports and rotate around a central rotating shaft; the air inlet cover plate is driven to be closed by an air inlet cover plate reset torsion spring; the tuyere cover plate, the shell, the valve body and the valve locking mechanism are all made of metal materials; its characterized in that, lock valve mechanism sets up at the bottom rear of central authorities' rotation axis, comprises base, hasp, lock valve torsional spring and two lock valve rods, the hasp will be two lock valve rod lock is at the casing middle part, and the hasp is by two low temperature solder welding for the locking plate, the hasp is because of the high temperature disconnection back, lock valve torsional spring drive lock valve rod is by the middle part to controlling both sides rotation, and lock valve rod top is rotatory to the lock valve point that is close to wind gap lid board outer fringe, makes wind gap apron locking in the wind gap.

Further, the included angle alpha between the rotating shaft of the lock valve rod and the central rotating shaft is smaller than 90 degrees and larger than 80 degrees.

Furthermore, the air port cover plate is rolled with a valve locking groove matched with the inner edge of the air port, and the valve locking point is arranged in the valve locking groove.

Further, a rubber pad is arranged between the air inlet cover plate and the air inlet.

Further, the rubber pad is arranged on the air inlet cover plate.

Further, the melting temperature of the low-temperature solder is lower than 300 ℃.

Further, the included angle between the plane of the tuyere and the horizontal plane is 75-85 degrees.

When the smoke exhaust fire damper works normally, the locking valve rod is locked through the locking sheet welded by the low-melting point, so that the valve body can exhaust smoke normally; when the temperature of the external flue exceeds a threshold value, the locking sheet is welded, the locking valve rod is released, the locking valve rod is opened under the action of the reset spring, the valve is forcibly closed, and the locking valve rod is effectively locked; so that the protection effect is more reliable.

Drawings

FIG. 1 is a perspective view of a smoke evacuation fire damper of the present invention;

FIG. 2 is a front view of the smoke evacuation fire damper of the present invention;

FIG. 3 is a left side view of the schematic view of the smoke evacuation fire damper of the present invention;

FIG. 4 is a schematic perspective view of a smoke evacuation fire damper of the present invention;

fig. 5 is a schematic structural view of the latch valve mechanism.

In the figure: 1. a housing; 2. A valve body; 3. a tuyere cover plate; 4. a valve locking mechanism; 41. a mounting seat; 42. a base; 421. a locking structure; 43. a lock valve stem; 431. an avoidance zone; 44. locking; 45. a latch valve torsion spring; 5. the tuyere cover plate is reset by a torsion spring; A. rotating the central shaft; B. a valve locking point; C. starting interval; α, rotation axis deflection angle.

Detailed Description

The present invention will now be more fully described with reference to the following examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 and 2, the smoke evacuation fire damper in the present embodiment includes a housing 1, a valve body 2, and a valve locking mechanism 4; the valve body 2 is welded in the shell 1; is mounted at the flue outlet through the housing 1.

The valve body 2 is provided with two air ports in bilateral symmetry, and the oil smoke is discharged to a public flue through the two air ports. The tuyere cover plate 3 is also provided with a tuyere cover plate reset torsion spring 5 for closing the tuyere cover plate 3; the addition of the tuyere cover plate reset torsion spring 5 is beneficial to improving the force for closing the tuyere and avoiding the untight closing of the fireproof valve; the tuyere cover plate 3, the shell 1, the valve body 2 and the valve locking mechanism 4 are all made of high-temperature-resistant metal materials such as steel, iron and aluminum alloy, and the problems that fire happens in a flue and parts are damaged and failed are avoided. Lock valve mechanism 4 sets up the bottom rear at the central rotation axis, as shown in fig. 5, lock valve mechanism 4 comprises base 42, hasp 44, lock valve torsional spring 45 and two lock valve rods 43, hasp 44 will be two lock valve rods 43 lock at the casing middle part, and hasp 44 is by two low temperature solder welding for the locking plate, hasp 44 is because of the high temperature disconnection back, lock valve torsional spring 45 drives lock valve rod 43 is rotatory to both sides about by the middle part, and lock valve rod 43 top is rotatory to being close to the lock valve point A of 3 outer edges of wind gap apron, makes wind gap board 3 lock at the wind gap. The base 42 is fixedly connected with the mounting seat 41; the mount 41 is fixedly attached to the housing 1 by welding, riveting or bolting.

The plane of the air port can be arranged in a way that the top end is arranged forwards (at the side of a public flue) and is inclined with the horizontal plane, and two air port cover plates 3 which correspond to the air port and rotate around a central rotating shaft are arranged on the inner side of the valve body 2; the tuyere can be closed by the gravity of the tuyere cover 3.

The lock catch 44 is formed by welding two L-shaped copper sheets into a U shape by soldering tin, the two lock valve rods 43 are combined in the middle, the U-shaped opening is slightly larger than the size of the combination of the two lock valve rods 43, and the two lock valve rods 43 are clamped by the U-shaped opening. The latch 44 may also take other forms, such as: when the two lock valve rods 43 are combined at the middle position, two U-shaped aluminum sheets are buckled inwards from the left side and the right side; and welding and connecting the two U-shaped aluminum sheets together by using soldering tin to form the O-shaped lock catch. Alternatively, two lock valve stems 43 may be tied together in an intermediate position directly with solder wire wrapped in multiple passes.

As shown in fig. 3 and 4, a rotation center axis a of the rotation shaft of the lock valve rod 43 forms a certain angle with a lower section of the central rotation shaft of the air flap plate 3; the deflection angle alpha of the rotating shaft is less than 90 degrees; and greater than 80 degrees; when the lock valve rod 43 is in the middle position, the top end of the lock valve rod 43 is spaced from the tuyere plane by a starting distance C. The top end of the valve locking rod 43 is driven by the valve locking torsion spring 45 to rotate outwards, and in the rotating process, the top end of the valve locking rod 43 pushes the air port cover plate 3 to the air port closing position; the clearance between the top end of the lock valve rod 43 and the plane of the tuyere is gradually reduced, when the top end of the lock valve rod 43 rotates to a valve locking point B at the outer edge of the tuyere cover plate 3, the tuyere cover plate 3 completely closes the tuyere, and the tuyere does not continuously turn over under the support of the tuyere plane; the lock valve rod 43 stops rotating because the top end is blocked by the flap plate 3. Because the deflection angle alpha of the rotating shaft is close to 90 degrees near the valve locking point B, the component force of the wind cover plate 3 to the top end of the valve locking rod 43 along the plane of the wind cover plate is small, and the friction force between the valve locking rod 43 and the wind cover plate 3 cannot be overcome; even if the torsion of the latch torsion spring 45 is reduced or disappears, the position of the latch lever 43 does not move, and the latch state can be maintained.

In order to reduce the noise when closing the fire damper, a rubber pad is arranged between the tuyere cover plate 3 and the tuyere periphery. The rubber pad is high temperature resistant silicon rubber.

In order to protect the rubber pad and avoid the rubber pad from contacting with open fire; the tuyere cover plate 3 is arranged into an inner layer and an outer layer; the outer layer is slightly larger than the opening of the tuyere and can seal the tuyere; the rubber pad is clamped between the two layers of cover plates, and the exposed rubber pad forms a sealing structure at the periphery of the air opening; the exposed rubber pad is bonded on the inner side of the outer cover plate, and the outer cover plate provides support for the exposed rubber pad.

In order to improve the sealing effect, the inner edge of the air port is arranged to be sunken towards one side of the public flue; forming a slope; the outer layer cover plate is concave towards the indoor flue corresponding to the inclined plane; the two inclined planes are matched, so that the area of a sealing surface when the valve is closed is increased.

In order to avoid the failure of the fire valve locking caused by the rotation of the valve locking rod 43 after the valve locking torsion spring 45 fails at high temperature; a locking valve groove is rolled on the inner side of the tuyere cover plate 3; the latch valve point B is disposed within the latch valve recess. When the latch torsion spring 45 cannot provide enough torque, the top end of the latch rod 43 cannot rotate due to the blocking of the latch groove, and can still stay at the latch point B, so as to avoid the failure of latching.

The low-temperature solder is not limited to solder, and the melting temperature of the low-temperature solder may be lower than 300 ℃.

The included angle between the plane of the tuyere and the horizontal plane is 75-85 degrees; namely, the self-weight of the air flap cover plate 3 is utilized to assist in closing the valve; and has little effect on the axial length of the housing.

The base 42 is provided with a mounting hole of the rotating shaft; the valve locking torsion spring 45 is arranged on the rotating shaft in a penetrating way; the static end is fixed with the mounting seat 41 or the base 42; the rotating end is connected with the valve locking rod 43; after the latch is disconnected, the latch lever 43 is driven to rotate to both sides, respectively. The lock valve torsion springs 45 of the two lock valve rods 43 can be arranged respectively, or the standing ends can be connected together, and the releasing directions are opposite.

The top of the outer base 42 may also be provided with a locking structure 421; as shown in the U-shape, the bottom of the U-shaped locking structure 421 can be used to help define the maximum rotation angle of the locking valve rod 43 when locking the valve; the outer wall of the U-shaped locking structure 421 can limit the axial movement of the rotating shaft after the valve-locking torsion spring 45 fails; avoiding the failure of locking the valve.

The top end of the lock valve rod 43 is also provided with an avoidance area 431; the top end of the lock valve rod 43 is bent or bent outwards to avoid the central rotating shaft; it is possible to avoid the start interval C from being excessively large.

The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.

Claims

1. A smoke-discharging fire-proof valve comprises a shell, a valve body and a valve locking mechanism; the valve body is provided with two air ports in bilateral symmetry, and the inner side of the valve body is provided with two air port cover plates which correspond to the air ports and rotate around a central rotating shaft; the air inlet cover plate is driven to be closed by an air inlet cover plate reset torsion spring; the air port cover plate, the shell, the valve body and the valve locking mechanism are all made of metal materials; the air inlet cover plate is characterized in that the valve locking mechanism is arranged at the rear of the bottom of the central rotating shaft and consists of a base, a lock catch, a valve locking torsion spring and two valve locking rods, the two valve locking rods are locked in the middle of the shell by the lock catch, the lock catch is formed by welding two locking plates by low-temperature welding materials, after the lock catch is disconnected due to high temperature, the valve locking torsion spring drives the valve locking rods to rotate from the middle to the left and right sides, the top of the valve locking rods is screwed to a valve locking point close to the outer edge of the air inlet cover plate, and the air inlet cover plate is locked at an air inlet; the included angle between the rotating shaft of the lock valve rod and the lower section of the central rotating shaft is smaller than 90 degrees and larger than 80 degrees.

2. A smoke evacuation fire damper as claimed in claim 1 wherein said tuyere cover plate is rolled on the inside with a latch valve groove adapted to said tuyere inner edge, said latch valve point being disposed in said latch valve groove.

3. A smoke evacuation fire damper as in claim 1 wherein a rubber gasket is provided between said tuyere cover plate and said tuyere.

4. A smoke evacuation fire damper as claimed in claim 3 wherein said rubber mat is provided on said tuyere cover plate.

5. The smoke evacuation fire damper of claim 1, wherein said low temperature solder has a melting temperature of less than 300 degrees celsius.