CN215806532U - Fireproof check valve for oil smoke exhaust - Google Patents

Abstract

The utility model discloses a fireproof check valve for oil smoke discharge, which comprises: the valve body is provided with an air inlet and an air outlet on two sides respectively; the tubular blocking part is arranged on the periphery of the air outlet; the subassembly is moved back to fire prevention is located tubulose blocking part bottom side internal surface, still includes: a non-return block; the fuse link is arranged on the non-return block and plays a role in fixing and closing the non-return block; the valve plate is rotatably connected to the fireproof check assembly, is perpendicular to the check block and covers the air outlet, is rotatably opened along the air outlet direction, has an upward opening and forms an upward oblique air flow channel with the tubular blocking part, and when the fuse link is fused, the check block is opened and covers the valve plate at the air outlet. The valve plate is opened and closed through the fireproof check assembly, the structure is greatly simplified, and the production efficiency of the product is greatly improved.

Description

Fireproof check valve for oil smoke exhaust

Technical Field

The utility model relates to the technical field of check valves, in particular to a fireproof check valve for oil smoke discharge.

Background

The flue check valve is also called a reverse flow valve, a check valve, a back pressure valve, a check valve and a flue valve. The valve is automatically opened and closed by the force generated by the flow of the medium in the pipeline, and belongs to an automatic valve.

In the kitchen using the longitudinal public flue, in order to prevent the oil smoke in the flue from flowing back into the kitchen, a device such as a flue check valve is arranged between the air outlet pipe orifice of the range hood and the public flue. The existing flue check valve generally comprises an oil smoke channel formed by a shell, the oil smoke channel is provided with an air inlet and an air outlet which are opposite, the air inlet is connected with an air outlet pipe orifice of the range hood, the air outlet extends into a public flue gas channel, an openable valve plate is arranged at the air outlet of the oil smoke channel, and the valve plate is rotatably arranged on the inner wall of the oil smoke channel through a valve plate rotating shaft which is horizontally arranged. When the range hood is not used, the valve plate is in a closed position due to the gravity of the valve plate, and the valve plate covers the air outlet part; when the range hood is used, the valve plate is in the opening position, and the valve plate is far away from the air outlet. As a plurality of users share one longitudinal public flue gas channel, once a fire disaster happens to one household, a large amount of high-temperature harmful gas flows into the longitudinal public flue gas channel, and if a valve plate in a flue check valve is not closed in time, the large amount of high-temperature harmful gas can enter the household using the range hood through an oil smoke channel of the flue check valve, so that the life safety of the household is threatened.

In the prior art, the inventor has applied for chinese patent CN212297811U, a highly airtight fire prevention check valve is disclosed, this includes the valve body, the valve block, guide plate and fire prevention check assembly, the both sides of valve body are provided with air intake and air outlet respectively, the valve block lid fits air outlet department, the lower extreme of valve block is rotationally connected with the valve body with the help of jump ring subassembly, the upper end orientation of valve block inclines near the direction of valve body, the guide plate sets up in valve body orientation air outlet one side, the guide way has been seted up to the relative both sides on the guide plate, fire prevention check assembly includes fuse-link, the locating part, the knot pole and spring. The valve plate can be opened upwards by changing the connection of the valve plate and the valve body into the connection of the lower end, so that the valve plate is more in line with the flow direction of the flue ascending air flow. Through setting up the contrary subassembly of stopping that prevents fires, can be when the conflagration emergence automatic closed valve block, prevent that flame and harmful gas from stretching along the flue.

But whole valve body has set up guide plate, jump ring subassembly, fire prevention and has had a contrary subassembly, and overall structure is complicated, and machining efficiency is low and with high costs.

Accordingly, the present invention is directed to a fire-proof check valve for discharging cooking fumes, which solves the above-mentioned problems of the related art.

Disclosure of Invention

The present invention is directed to a fire-proof check valve for oil smoke exhaust to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a range hood fire check valve comprising: the valve body is provided with an air inlet and an air outlet on two sides respectively; the tubular blocking part is arranged on the periphery of the air outlet; the subassembly is moved back to fire prevention is located tubulose blocking part bottom side internal surface, still includes: a non-return block; the fuse link is arranged on the non-return block and plays a role in fixing and closing the non-return block; the valve plate is rotatably connected to the fireproof check assembly, is perpendicular to the check block and covers the air outlet, is rotatably opened along the air outlet direction, has an upward opening and forms an upward oblique air flow channel with the tubular blocking part, and when the fuse link is fused, the check block is opened and covers the valve plate at the air outlet. The valve plate is opened and closed through the fireproof check assembly, the structure is greatly simplified, and the production efficiency of the product is greatly improved.

Further, the fire protection backstop assembly further comprises: the fixing block is connected with the inner surface of the bottom side of the tubular blocking part; the first rotating shaft is arranged on one side of the fixed block, and the non-return block is rotationally connected to the first rotating shaft along the direction of the air outlet; the second rotating shaft is arranged on one side, close to the air inlet, of the fixed block and is vertical to the first rotating shaft; the valve plate connecting block is rotatably connected to the second rotating shaft; the first torsion spring is sleeved on the first rotating shaft; the second torsion spring is sleeved on the second rotating shaft. The opening and closing of the valve plate are controlled by adopting the torsion spring, and when the temperature of the flue exceeds 150 ℃, the fuse link is fused, the check block is ejected out through the elasticity of the torsion spring, so that the valve plate is quickly closed, toxic gas is prevented from spreading along the flue, the structure is simple, the safety is ensured, and the product cost is greatly reduced.

Furthermore, the valve body, the tubular blocking part, the fireproof non-return component and the valve plate are all made of 304 stainless steel.

Furthermore, the fuse link comprises a first brass sheet and a second brass sheet, the first brass sheet and the second brass sheet are welded and connected through tin and bismuth alloys, the first brass sheet is connected with the non-return block, and the second brass sheet is connected with the fixed block;

further, the fusing temperature of the fuse link is 150 ℃ +/-2 ℃.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that:

1. the valve block is opened and closed through the fireproof check assembly, the valve block is opened in a rotating mode along the direction of the air outlet, the opening is upward, and an upward oblique air flow channel is formed between the valve block and the tubular blocking portion.

2. The opening and closing of the valve plate and the quick bouncing of the check block are controlled by the torsion spring, so that the safety is ensured, the structure is simple, the assembly is quick and convenient, and the cost is greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic rear view of the present invention;

FIG. 3 is a schematic diagram of a fire stop assembly according to the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1 to 3, in the embodiment of the present invention, the oil smoke discharging fireproof check valve includes a valve body 1, a valve plate 2, and a fireproof check assembly 3, and all of these components may be made of 304 stainless steel, so as to increase the safety factor. The both sides of valve body 1 are provided with air intake 11 and air outlet 12 respectively, air intake week side sets up tubulose connecting portion 13, connects lampblack absorber air-out pipe, and air outlet 12 week side sets up tubulose blocking part 14, and the material adopts 304 stainless steel.

The inner surface of the bottom side of the tubular blocking part 14 is provided with a fire-proof check assembly 3, the fire-proof check assembly 3 comprises a fixed block 31 connected with the inner surface of the bottom side of the tubular blocking part 14, a first rotating shaft 32 arranged on one side of the fixed block 31, the first rotating shaft 32 is arranged along the direction of the air outlet 12, a check block 33 rotatably connected to the first rotating shaft 32, a fuse link 34 arranged on the check block 33, a second rotating shaft 35 arranged on one side of the fixed block 31 close to the air inlet 11, the second rotating shaft 35 is perpendicular to the first rotating shaft 32, and is rotatably connected to a valve sheet connecting block 36 of the second rotating shaft 35, the valve sheet connecting block 36 is connected with the valve sheet 2, the first rotating shaft 32 is sleeved with a first torsion spring (not shown in the figure), and the second rotating shaft 35 is sleeved with a second torsion spring (not shown in the figure).

The fuse link 34 comprises a first brass sheet 341 and a second brass sheet 342, the first brass sheet 341 and the second brass sheet 342 are welded and connected through tin and bismuth alloy, wherein the first brass sheet 341 is connected with the non-return block 33, the second brass sheet 342 is connected with the fixed block 31, the fusing temperature of the fuse link 34 is 150 +/-2 ℃, and the fusing temperature is mainly controlled through a welding part. When the temperature is greater than the fusing temperature, the first brass plate 341 and the second brass plate 342 are separated.

The working principle of the utility model is as follows:

the tubular connecting part 13 of the valve body 1 is connected to an air outlet on a range hood, one end of two ends of the second torsion spring is pressed on the fixed block 31, the other end of the second torsion spring covers the valve sheet 2 at the air outlet 12 of the valve body 1, two ends of the first torsion spring are respectively pressed on the fixed block 31 and the check block 33, when the range hood starts to work, the valve sheet 2 can be rotated and opened along the direction of the air outlet 12 under the action of air pressure, the opening is upward, an oblique upward air flow channel is formed between the valve sheet and the tubular blocking part 14, and the second torsion spring plays a supporting role on the valve sheet 2 through the ends to ensure the stability of the air flow channel; under the condition that the temperature of the flue is normal, because the fireproof check assembly 3 is in a closed state, and because the fireproof check assembly 3 is positioned on one side of the flue, when the temperature of the flue exceeds 150 ℃, the fuse link 34 is fused at the welding part, at the moment, the end of the first torsion spring ejects the check block 33, and tightly covers the valve plate 2 with the air outlet 12 of the valve body 1, so that the valve plate 2 is prevented from being washed away by heat wave, and toxic gas is prevented from spreading along the flue.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims (5)

1. The utility model provides a lampblack discharge fireproof check valve which characterized in that includes:

the valve body is provided with an air inlet and an air outlet on two sides respectively;

the tubular blocking part is arranged on the periphery of the air outlet;

the subassembly is moved back to fire prevention is located tubulose blocking part bottom side internal surface, still includes:

a non-return block;

the fuse link is arranged on the non-return block and plays a role in fixing and closing the non-return block;

the valve plate is rotatably connected to the fireproof check assembly, is perpendicular to the check block and covers the air outlet, is rotatably opened along the air outlet direction, has an upward opening and forms an upward oblique air flow channel with the tubular blocking part, and when the fuse link is fused, the check block is opened and covers the valve plate at the air outlet.

2. The range hood fire check valve of claim 1, wherein: the fire protection backstop assembly further comprises:

the fixing block is connected with the inner surface of the bottom side of the tubular blocking part;

the first rotating shaft is arranged on one side of the fixed block, and the non-return block is rotationally connected to the first rotating shaft along the direction of the air outlet;

the second rotating shaft is arranged on one side, close to the air inlet, of the fixed block and is vertical to the first rotating shaft;

the valve plate connecting block is rotatably connected to the second rotating shaft;

the first torsion spring is sleeved on the first rotating shaft;

the second torsion spring is sleeved on the second rotating shaft.

3. The range hood fire check valve of claim 1, wherein: the valve body, the tubular blocking part, the fireproof non-return component and the valve plate are all made of 304 stainless steel.

4. The range hood fire check valve of claim 2, wherein: the fuse link comprises a first brass sheet and a second brass sheet, the first brass sheet and the second brass sheet are connected through tin-bismuth alloy welding, the first brass sheet is connected with the non-return block, and the second brass sheet is connected with the fixed block.

5. The fire check valve for cooking fumes of any one of claims 1 to 4, wherein: the fusing temperature of the fuse link is 150 +/-2 ℃.

Images