CN213064755U

CN213064755U - Oil smoke discharging fireproof check valve

Info

Publication number: CN213064755U
Application number: CN202021304402.8U
Authority: CN
Inventors: 姚世杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-04-27
Anticipated expiration: 2030-07-06

Abstract

The utility model provides an oil extraction flue gas fire prevention check valve, the on-line screen storage device comprises a base, a valve body, dustcoat and valve block, at dustcoat internally mounted have the depression bar and with depression bar matched with fuse the mechanism, under the state of fuse the mechanism pinning depression bar, the valve block can freely be opened, under the state of fuse the mechanism release depression bar, the depression bar compresses tightly and closes the valve block, the valve block passes through slewing mechanism and is connected with the rotation of valve body top, install first absorption piece at the valve body top, last the second of installing on the slewing mechanism can inhaling mutually with first absorption piece magnetism adsorbs the piece, and, it is first, magnetic force between the second adsorption piece is along with the valve block open the increase of angle and grow gradually. This fire prevention check valve installs the first, the second that can magnetism attract mutually on valve body top and valve block slewing mechanism and adsorbs the piece, and along with the valve block increases of opening the angle, first, the second adsorbs magnetic force between the piece can grow gradually, and consequently, when the valve block was opened to the maximum angle, magnetic force was enough big and can be inhaled the valve block to satisfy the product and open the detection standard of angle to the valve block is the biggest.

Description

Oil smoke discharging fireproof check valve

Technical Field

The utility model relates to a fire prevention valve especially relates to an oil extraction cigarette fire prevention check valve.

Background

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.

For example, in the "flue fire damper for a range hood" disclosed in application No. 201510675514.1 (application publication No. CN 105240582A), the forced closing rod of the flue fire damper is limited on the second bracket by the deformation piece when the deformation piece is not deformed, the deformation piece is deformed by heat, and then the limit on the forced closing rod is released, and the forced closing rod acts on the fire damper under the action of the elastic piece, so that the fire damper is forcibly closed to isolate fire. Because the valve plate can only be closed from the outside of the valve plate, when a fire disaster occurs at a user house, a large amount of high-temperature harmful gas flows into the public flue, the loss of the high-temperature harmful gas can not be blocked from the source, and the life safety of other users is threatened. In addition, because the valve block receives self gravity influence after opening, if valve block gravity is greater than the effort of flue air current to the valve block, the valve block can't keep opening the state, consequently, current many flue fire prevention valves are difficult to satisfy the standard requirement to the valve block maximum opening angle among the industry standard.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation, a oil extraction cigarette fire prevention check valve that the valve block opening angle is big is provided.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this oil extraction flue gas fire prevention check valve, including base, valve body, dustcoat and valve block, the pedestal mounting be in the outside of dustcoat, the valve body is installed inside the dustcoat, the valve block is connected with rotating on the valve body, at dustcoat internally mounted have the depression bar and with depression bar matched with fuse-link mechanism, under the state of the depression bar is pinned to fuse-link mechanism, the valve block can freely be opened, under the state of fuse-link mechanism release depression bar, the depression bar compresses tightly and closes the valve block, the valve block pass through slewing mechanism with the valve body top is rotated and is connected its characterized in that: the top of the valve body is provided with a first adsorption block, the rotating mechanism is provided with a second adsorption block which can be magnetically attracted with the first adsorption block, and the magnetic force between the first adsorption block and the second adsorption body is gradually increased along with the increase of the opening angle of the valve plate.

The rotating mechanism can have various structures, preferably, the rotating mechanism comprises a hinge seat, a hinge piece and a pin shaft, the hinge seat is fixed on the outer side face of the top of the valve body, the pin shaft is installed on the hinge seat, the hinge piece is installed on the pin shaft, the valve plate is installed on the lower portion of the hinge piece and rotates synchronously with the hinge piece, the second adsorption block is installed on the upper portion of the hinge piece, and the distance between the second adsorption block and the first adsorption block gradually decreases along with the increase of the opening angle of the valve plate.

In order to enable the first adsorption block and the second adsorption block to be adsorbed smoothly, the first adsorption block is arranged at the top of the outer side face of the valve body, and the second adsorption block is arranged at the upper part of the inner side face of the hinge piece.

Preferably, the first adsorption block is a magnet, and the second adsorption block is a metal block or a magnet.

Preferably, a pressure rod seat is installed on the outer side surface of the valve body, the pressure rod is movably arranged on the pressure rod seat, and the fusing mechanism is installed between the valve body and the pressure rod seat.

The fusing mechanism can have multiple structures, preferably, the fusing mechanism includes movable rod, first temperature-sensing element, second temperature-sensing element, temperature-sensing element mount pad and elastic component, first temperature-sensing element is installed the inner end of movable rod is spacing on the valve body, the upper portion of second temperature-sensing element is installed on the temperature-sensing element mount pad, the lower part of second temperature-sensing element pins the depression bar, the temperature-sensing element mount pad has the ascending draw-in groove of opening, the movable rod card is established on the draw-in groove, the middle part of movable rod has the throat, the external diameter of throat is less than the width of draw-in groove, the elastic component is installed in the outer end of movable rod and makes the movable rod keep having the trend of outside removal. After the structure is adopted, as long as one of the first temperature sensing element and the second temperature sensing element is fused, the pressure rod can be released, and then the valve plate is pressed and closed.

Preferably, the outer end of the movable rod extends outwards to the outside of the pressure rod seat, the head of the outer end of the movable rod is provided with a radial bolt, the temperature sensing element mounting seat is arranged on the outside of the pressure rod seat, the elastic part is a spring sleeved on the outer end of the movable rod, the inner end of the spring abuts against the temperature sensing element mounting seat, and the outer end of the spring abuts against the radial bolt. Therefore, as long as one of the first temperature sensing element and the second temperature sensing element is fused, the spring can smoothly drive the movable rod to move outwards, and further the pressure rod is released.

Preferably, a first spacer is mounted between the inner end of the spring and the temperature sensing element mounting seat, and a second spacer is mounted between the outer end of the spring and the radial plug pin.

In order to facilitate the quick falling of the temperature sensing element mounting seat, the clamping groove is a U-shaped groove.

In order to enable the pressure rod to more reliably press the valve plate, sliding grooves are formed in two sides of the pressure rod seat, two ends of the pressure rod are connected with tension springs, the tension springs drive the pressure rod to move downwards along the sliding grooves and press the valve plate in the state that the pressure rod is released, and the pressure rod is located below the horizontal center line of the valve plate in the state that the pressure rod moves downwards to the lowest position.

Compared with the prior art, the utility model has the advantages of: because this oil extraction flue gas fire prevention check valve is at the first adsorption piece of valve body top installation, the second adsorption piece that can inhale with this first adsorption piece magnetism looks of installation on the slewing mechanism of valve block, and along with the increase of angle is opened to the valve block, magnetic force between first adsorption piece and the second adsorption piece can grow gradually, consequently, when the valve block was opened to the maximum angle, magnetic force was enough big and can be inhaled the valve block to satisfy the product and open the detection standard of angle to the valve block is the biggest.

Drawings

Fig. 1 is a schematic structural view of the embodiment of the present invention in an open state of the valve plate;

FIG. 2 is a schematic view of the structure of FIG. 1 with the base and cover removed;

FIG. 3 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 1 at a different angle;

FIG. 6 is an enlarged view of portion B of FIG. 5;

fig. 7 is a schematic diagram of the structure of the embodiment of the present invention in the closed state of the valve plate.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 6, the fire-proof check valve for oil smoke exhaust of the present embodiment includes a base 1, a valve body 2, an outer cover 3, a valve plate 4, a pressure lever 5, a fusing mechanism 6, a rotating mechanism 7, a first adsorption block 8, a second adsorption block 9, a pressure lever seat 10, a tension spring 11, and other main components.

Wherein, base 1 installs in the outside of dustcoat 3, and valve body 2 installs inside dustcoat 3, and valve block 4 rotates through slewing mechanism 7 to be connected at the top of valve body 2. The pressure lever 5 and the fusing mechanism 6 are installed inside the outer cover 3, the pressure lever 5 is matched with the fusing mechanism 6, the valve plate 4 can be freely opened under the condition that the fusing mechanism 6 locks the pressure lever 5, and the pressure lever 5 compresses and closes the valve plate 4 under the condition that the fusing mechanism 6 releases the pressure lever 5. In this embodiment, the first adsorption block 8 is a magnet installed on the top of the outer side surface of the valve body 2, the second adsorption block 9 is a metal block or a magnet installed on the rotating mechanism 7, the second adsorption block 9 can magnetically attract the first adsorption block 8, and the magnetic force between the second adsorption block 9 and the first adsorption block 8 gradually increases along with the increase of the opening angle of the valve plate 4.

The rotating mechanism 7 of the embodiment includes a hinge seat 71, a hinge piece 72 and a pin 73, the hinge seat 71 is fixed on the outer side surface of the top of the valve body 2, the pin 73 is installed on the hinge seat 71, the hinge piece 72 is installed on the pin 73, the valve plate 4 is installed on the lower portion of the hinge piece 72 and rotates synchronously with the hinge piece 72, and the second adsorption block 9 is installed on the upper portion of the hinge piece 72. Along with the increase of the opening angle of the valve plate 4, the distance between the second adsorption block 9 and the first adsorption block 8 is gradually reduced, so that the magnetic force between the second adsorption block and the first adsorption block is gradually increased, when the valve plate 4 is opened to the maximum angle, the magnetic force is maximum, and when the component force of the resultant force of the magnetic force and the flue gas flow in the vertical direction is greater than the gravity of the valve plate 4, the valve plate 4 can be ensured to be kept at the maximum opening angle.

In addition, a pressure lever seat 10 is installed on the outer side surface of the valve body 2, sliding grooves 100 are formed in two sides of the pressure lever seat 10, two ends of a pressure lever 5 are movably arranged in the corresponding sliding grooves 100, tension springs 11 are further connected to two ends of the pressure lever 5, and the tension springs 11 generate downward tension on the pressure lever 5 to enable the pressure lever 5 to keep a downward moving trend.

The fusing mechanism 6 in this embodiment is installed between the valve body 2 and the plunger seat 10. Specifically, the fuse mechanism 6 includes a movable lever 61, a first temperature sensing element 62, a second temperature sensing element 63, a temperature sensing element mount 64, and a spring 65. The first temperature sensing element 62 and the second temperature sensing element 63 both adopt fuse links, and when the corresponding melting points are reached, the fuse links can be fused. The first temperature sensing element 62 is mounted at the inner end of the movable rod 61 and limited on the valve body 2, the upper part of the second temperature sensing element 63 is mounted on the temperature sensing element mounting seat 64, the lower part of the second temperature sensing element 63 is provided with a hook part 631 locking the pressure rod 5, the temperature sensing element mounting seat 64 is provided with a clamping groove 641 with an upward opening, the movable rod 61 is clamped on the clamping groove 641, the middle part of the movable rod 61 is provided with a necking part 611, the outer diameter of the necking part 611 is smaller than the width of the clamping groove 641, and the spring 65 is mounted at the outer end of the movable rod 61 and enables the movable rod 61 to keep a trend of moving.

The mounting structure of the spring 65 is as follows:

the outer end of the movable rod 61 extends outwards to the outer side of the pressure rod seat 10, the head of the outer end of the movable rod 61 is provided with a radial bolt 66, the temperature sensing element mounting seat 64 is arranged on the outer side of the pressure rod seat 10, the spring 65 is sleeved on the outer end of the movable rod 61, a first gasket 67 is arranged between the inner end of the spring 65 and the temperature sensing element mounting seat 64, a second gasket 68 is arranged between the outer end of the spring 65 and the radial bolt 66, the inner end of the spring 65 abuts against the temperature sensing element mounting seat 64, and the outer end of the spring 65 abuts against the radial bolt 66.

When abnormal conditions such as fire disaster do not occur, the temperature of the kitchen and the public flue is low, the first temperature sensing element 62 and the second temperature sensing element 63 cannot be fused, at the moment, the hook part 631 of the second temperature sensing element 63 hooks the pressing rod 5, the pressing rod 5 is separated from the valve plate 4, acting force cannot be generated on the valve plate 4, and therefore the valve plate 4 can be smoothly opened under the action of flue gas flow.

When abnormal conditions such as fire disaster occur in the kitchen, the temperature in the kitchen rises, when the temperature near the first temperature sensing element 62, namely the inner side of the check valve reaches the melting point of the first temperature sensing element 62, the first temperature sensing element 62 is fused, the movable rod 61 moves outwards under the elastic force of the spring 65, when the movable rod 61 moves to a position where the constricted portion 611 thereof is located in the notch 641 of the temperature sensing element holder 64, since the outer diameter of the constricted part 611 is smaller than the width of the engaging groove 641, the temperature sensing element mounting seat 64 is separated from the movable rod 61, and since the second temperature sensing element 63 hooked on the pressing rod 5 is mounted on the temperature sensing element mounting seat 64, therefore, as the temperature sensing element mounting seat 64 is disengaged, the pressing rod 5 is released, the pressing rod 5 moves downwards along the sliding slot 100 on the pressing rod seat 10 under the driving of the tension spring 11, and the valve plate 4 is pressed tightly, so that the valve plate 4 can not be opened by flue gas flow, thereby preventing high-temperature flue gas from entering a common flue. In addition, as shown in fig. 7, in a state that the pressure lever 5 moves downward to the lowest position, the pressure lever 5 is located below the horizontal center line of the valve plate 4, so that the pressure lever 5 can be ensured to keep enough pressing force on the valve plate 4, and the use is safer and more reliable.

When other users have abnormal conditions such as fire and the like, high-temperature smoke enters the public flue to cause the temperature of the flue to be higher, when the temperature near the second temperature sensing element 63, namely the temperature outside the check valve reaches the melting point of the second temperature sensing element 63, the second temperature sensing element 63 is fused, the pressure lever 5 is released, the pressure lever 5 is driven by the tension spring 11 to move downwards along the sliding groove 100 on the pressure lever seat 10, and the valve plate 4 is pressed to enable the valve plate 4 not to be opened by flue airflow, so that the high-temperature smoke of the public flue is prevented from entering the home of the users.

Claims

1. The utility model provides an oil extraction flue gas fire prevention check valve, includes base (1), valve body (2), dustcoat (3) and valve block (4), base (1) is installed the outside of dustcoat (3), install inside dustcoat (3) valve body (2), valve block (4) are connected with rotating on valve body (2), have depression bar (5) and with depression bar matched with fuse link (6) at dustcoat (3) internally mounted, under the state of pinning depression bar (5) in fuse link (6), valve block (4) can freely be opened, under the state of fuse link (6) release depression bar (5), depression bar (5) compress tightly and close the valve block, valve block (4) through slewing mechanism (7) with valve body (2) top is rotated and is connected its characterized in that: the valve is characterized in that a first adsorption block (8) is installed at the top of the valve body (2), a second adsorption block (9) which can be magnetically attracted with the first adsorption block (8) is installed on the rotating mechanism (7), and the magnetic force between the first adsorption block (8) and the second adsorption block (9) is gradually increased along with the increase of the opening angle of the valve plate (4).

2. The range hood fire check valve of claim 1, wherein: the rotating mechanism (7) comprises a hinge seat (71), a hinge piece (72) and a pin shaft (73), the hinge seat (71) is fixed on the outer side face of the top of the valve body (2), the pin shaft (73) is installed on the hinge seat (71), the hinge piece (72) is installed on the pin shaft (73), the valve piece (4) is installed on the lower portion of the hinge piece (72) and rotates synchronously with the hinge piece (72), the second adsorption block (9) is installed on the upper portion of the hinge piece (72), and the distance between the second adsorption block (9) and the first adsorption block (8) is gradually reduced along with the increase of the opening angle of the valve piece (4).

3. The range hood fire check valve of claim 2, wherein: the first adsorption block (8) is arranged at the top of the outer side face of the valve body (2), and the second adsorption block (9) is arranged at the upper part of the inner side face of the hinge piece (72).

4. The range hood fire check valve of claim 1, wherein: the first adsorption block (8) is a magnet, and the second adsorption block (9) is a metal block or a magnet.

5. The range hood fire check valve of claim 1, wherein: a pressure rod seat (10) is arranged on the outer side surface of the valve body (2), the pressure rod (5) is movably arranged on the pressure rod seat (10), and the fusing mechanism (6) is arranged between the valve body (2) and the pressure rod seat (10).

6. The range hood fire check valve of claim 5, wherein: the fusing mechanism (6) comprises a movable rod (61), a first temperature sensing element (62), a second temperature sensing element (63), a temperature sensing element mounting seat (64) and an elastic piece, the first temperature sensing element (62) is arranged at the inner end of the movable rod (61) and limited on the valve body (2), the upper part of the second temperature sensing element (63) is arranged on a temperature sensing element mounting seat (64), the lower part of the second temperature sensing element (63) locks the pressure lever (5), the temperature sensing element mounting seat (64) is provided with a clamping groove (641) with an upward opening, the movable rod (61) is clamped on the clamping groove (641), the middle part of the movable rod (61) is provided with a necking part (611), the outer diameter of the necking part (611) is smaller than the width of the clamping groove (641), and the elastic piece is installed at the outer end of the movable rod (61) and enables the movable rod to keep the trend of moving outwards.

7. The range hood fire check valve of claim 6, wherein: the outer end of the movable rod (61) outwards extends out of the outer side of the pressure rod seat (10), the head of the outer end of the movable rod (61) is provided with a radial bolt (66), the temperature sensing element mounting seat (64) is arranged on the outer side of the pressure rod seat (10), the elastic piece is a spring (65) sleeved on the outer end of the movable rod (61), the inner end of the spring (65) is abutted to the temperature sensing element mounting seat (64), and the outer end of the spring (65) is abutted to the radial bolt (66).

8. The range hood fire check valve of claim 7, wherein: a first gasket (67) is arranged between the inner end of the spring (65) and the temperature sensing element mounting seat (64), and a second gasket (68) is arranged between the outer end of the spring (65) and the radial bolt (66).

9. The range hood fire check valve of claim 6, wherein: the clamping groove (641) is a U-shaped groove.

10. The range hood fire check valve of claim 5, wherein: the two sides of the pressure rod seat (10) are provided with sliding grooves (100), two ends of the pressure rod (5) are connected with tension springs (11), the tension springs (11) drive the pressure rod (5) to move downwards along the sliding grooves (100) and compress the valve plate (4) in the state that the pressure rod (5) is released, and the pressure rod (5) is located below the horizontal center line of the valve plate (4) in the state that the pressure rod (5) moves downwards to the lowest position.