CN113790291A

CN113790291A - Fireproof check valve

Info

Publication number: CN113790291A
Application number: CN202111236406.6A
Authority: CN
Inventors: 聂法玉; 谭源生
Original assignee: GUANGZHOU CAIDIE ENERGY-SAVING TECHNOLOGY CO LTD
Current assignee: GUANGZHOU CAIDIE ENERGY-SAVING TECHNOLOGY CO LTD
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2021-12-14
Anticipated expiration: 2041-10-22
Also published as: CN113790291B

Abstract

The invention provides a fireproof check valve, which comprises a valve casing, a valve seat and a valve clack, wherein the valve casing is arranged on a residential exhaust passage and is positioned outside the residential exhaust passage, the valve casing is used for providing an exhaust passage and is connected with an air inlet of the residential exhaust passage, the valve seat is arranged on the valve casing and is positioned on the air inlet side of the exhaust passage, the valve clack is rotatably arranged on the valve casing and is matched with the valve seat to open or close the exhaust passage, the plane of the valve seat is inclined downwards towards the air inlet side of the exhaust passage, and an air inlet pipe is arranged on the valve seat, so that air has an inclined upwards flowing direction when entering the exhaust passage from the air inlet pipe. The invention is arranged outside the residential exhaust duct, provides an upward inclined exhaust mode and realizes the effect of quick exhaust.

Description

Fireproof check valve

Technical Field

The invention belongs to the technical field of residential exhaust ducts, and particularly relates to a fireproof check valve.

Background

The fire-proof check valve is one of the important components of the residential exhaust duct system, and mainly has the functions of guiding smoke in a resident room to flow upwards into the residential exhaust duct and preventing the smoke from flowing back, and meanwhile, the fire-proof check valve is provided with a fire-proof actuating mechanism to ensure fire-proof safety.

Fire check valve among the prior art installs on house exhaust passage, its water conservancy diversion part is mainly located the inside of house exhaust passage, need occupy certain space, for example, chinese patent application 2016106548305 discloses a fire check valve, which comprises a body, valve block and coupling mechanism, be equipped with the gas vent on the body, the valve block lid is established on the gas vent, the body passes through coupling mechanism with the valve block and is connected, fire check valve still includes the mounting and is used for slowing down the flexible piece that the valve block strikeed body effort, mounting one end is connected with the valve block, the mounting other end extrudes the flexible piece and makes this flexible piece centre gripping between mounting and valve block.

For another example, chinese patent application 2018112855827 discloses a fire-resistant check valve, which includes a valve body having an exhaust port and a valve plate for covering the exhaust port, wherein the valve plate has an annular joining region at its inner peripheral portion for sealingly joining the exhaust port, and a guide plate extending inwardly of the valve body is connected to the inner side of the valve plate along at least a portion of the inner edge of the annular joining region.

However, the fireproof check valve in the prior art is installed inside the residential exhaust duct, and the residential exhaust duct smoke emission is blocked due to the fact that the fireproof check valve occupies the internal space of the residential exhaust duct, so that the problems of large wind resistance, poor smoke emission effect and the like of a system are caused.

Therefore, improvements are needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a fireproof check valve which is arranged outside a residential exhaust duct and provides an upward inclined exhaust mode to realize the effect of quick exhaust.

In order to achieve the above object, the present invention provides a fire-proof check valve, comprising a valve housing, a valve seat and a valve flap, wherein the valve housing is mounted on a residential exhaust passage and is located outside the residential exhaust passage, the valve housing is used for providing an exhaust passage and is connected with an air inlet of the residential exhaust passage, the valve seat is arranged on the valve housing and is located on an air inlet side of the exhaust passage, the valve flap is rotatably arranged on the valve housing and is matched with the valve seat to open or close the exhaust passage, a plane of the valve seat is inclined downwards towards the air inlet side of the exhaust passage, and an air inlet pipe is arranged on the valve seat, so that air has an inclined upwards flowing direction when entering the exhaust passage from the air inlet pipe.

In the technical scheme of the invention, the valve casing is arranged outside the residential exhaust passage, so that the internal space of the residential exhaust passage is not completely occupied, and the exhaust process of smoke of the residential exhaust passage is not obstructed, thereby reducing the wind resistance of the whole system; meanwhile, the valve seat is arranged to incline downwards towards the air inlet side of the exhaust channel, and the valve seat is matched with the air inlet pipe, so that the air flowing in through the valve seat has an upward flow direction, the flue gas to be discharged can be guided to rapidly enter the residential exhaust channel and has a component (namely, upward flow) which is the same as the flow direction of the gas in the residential exhaust channel, and the exhaust process is smooth and efficient.

Correspondingly, the valve clack covers the valve seat in the same inclined state in the closed state, and after the valve clack is closed, the gravity of the valve clack can be utilized to enable the valve clack to be attached to the valve seat together, so that the sealing effect of the valve clack is improved, and the valve clack is prevented from being opened by mistake due to pressure fluctuation in the exhaust passage.

Preferably, the exhaust pipe and the valve seat are inclined downwards in the same direction, so that exhaust gas flows upwards obviously, and the smoke of the range hood or the exhaust fan does not need to pass through a 90-degree right-angle turn in the process of flowing into the residential exhaust passage, so that the wind resistance is small, and the gas is exhausted quickly, directly and smoothly.

In another embodiment of the invention, the angle between the plane of the valve seat and the vertical plane is not more than 60 °.

As another specific embodiment of the invention, the included angle between the plane of the valve seat and the vertical surface is 10-30 degrees.

As another specific embodiment of the present invention, a circular ring seat is disposed on the valve seat, and the circular ring seat is in sealing connection with the valve flap, and the valve flap covers the circular ring seat, wherein an air inlet pipe is formed by extending from an inner edge of the circular ring seat toward an air inlet side, so that all gas discharged from the air inlet pipe directly enters the exhaust passage.

The gas that gets into in the valve casing through the intake pipe in this scheme does not receive any stop, can be direct whole get into in the valve casing and finally discharged.

As another specific embodiment of the invention, the air inlet pipe is perpendicular to the circular ring seat.

In another embodiment of the invention, the valve housing has a front end plate, the annular seat is recessed in the direction opposite to the air flow direction to form a groove-shaped seat, or is raised from the front end plate in the air flow direction to form a convex seat, and the valve flap completely covers the annular seat.

As another specific embodiment of the present invention, the valve casing is a flow guiding valve casing, the valve casing has a top wall plate, the top wall plate is located above the valve flap, wherein at least a portion of the gas flowing through the top wall plate maintains its original flow direction, so that the flue gas entering the valve casing can directly flow upwards when being discharged, and on one hand, the flue gas rapidly exits from the valve casing (exhaust passage), and on the other hand, the exhaust velocity of the flue gas can be maintained, so that the flue gas can be smoothly discharged.

As another embodiment of the invention, the angle formed between the top wall panel and the valve seat exceeds 90 °, i.e. there is also an angle between the top wall panel and the horizontal plane to keep the gas entering the valve housing from exhausting obliquely upwards.

As another specific embodiment of the invention, the valve flap is in the shape of a single-flap circle, a half square semicircle or a square disk.

In another embodiment of the present invention, the valve flap is provided with a sealing ring for forming a sealing fit with the valve seat.

As another embodiment of the present invention, further comprising an opening and closing mechanism for opening and closing the valve flap, the opening and closing mechanism comprises:

the valve shaft is arranged on the valve shell, and the valve clack is rotationally arranged on the valve shaft;

the first torsion spring is arranged on the valve shaft and is always in a state of being compressed by the valve clack;

the second torsion spring is arranged on the valve shaft and is positioned on the rotating path of the valve clack;

wherein the valve clack is opened to the setting angle value during the exhaust and can be abutted against and compress the second torsion spring.

In the opening and closing process of the valve clack in this scheme, the synergistic effect produces similar "relay" effect between first torsional spring and the second torsional spring, makes the valve clack not only open easily, also closes easily, and is specific: the smaller the torque of the first torsion spring is, the easier the valve flap is to open under the action of pressure of airflow (discharged from a room), but when the opening angle of the valve flap is larger, the valve flap is difficult to close under the influence of the self weight of the valve flap, at the moment, by virtue of the relay action of the second torsion spring, when the opening angle of the valve flap is larger, the second torsion spring is compressed, and the second torsion spring and the first torsion spring act together in the closing process of the valve flap to promote the closing of the valve flap, so that the phenomenon that the traditional valve flap cannot be closed due to the influence of the gravity of the valve flap when the valve flap is opened at a larger angle is avoided.

As another specific embodiment of the present invention, a setting angle value range when the valve flap abuts against the second torsion spring is 10 ° to 30 °, and an included angle between the valve seat and the vertical surface is smaller than the setting angle value.

The invention has the following beneficial effects:

the fireproof check valve is arranged outside the residential exhaust passage, so that the internal space of the residential exhaust passage is not completely occupied, and the exhaust process of smoke of the residential exhaust passage is not obstructed, thereby reducing the wind resistance of the whole system;

the valve seat of the fireproof check valve is inclined downwards towards the air inlet side of the exhaust channel, and the exhaust branch pipe connected with the valve seat is also inclined downwards, so that the exhaust branch pipe is prevented from being bent downwards, oil stains accumulated in the exhaust branch pipe can be discharged in time, and the airflow wind resistance of the exhaust branch pipe is reduced; meanwhile, in the process that the smoke of the range hood or the exhaust fan flows into the residential exhaust duct, the smoke does not need to turn through a 90-degree right angle, so that the wind resistance is small, and the smoke discharging effect is good.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the installation of embodiment 1 of the fire check valve of the present invention;

FIG. 2 is a first schematic structural view of embodiment 1 of the fire check valve of the present invention;

FIG. 3 is a second schematic structural view of embodiment 1 of the fire check valve of the present invention;

FIG. 4 is a side schematic view of embodiment 1 of the fire check valve of the present invention;

FIG. 5 is a schematic view of the venting of embodiment 1 of the fire check valve of the present invention after the flap has opened;

FIG. 6 is a schematic structural view of embodiment 2 of the fire check valve of the present invention;

FIG. 7 is a schematic view of a first torsion spring and a second torsion spring of embodiment 2 of the fire check valve of the present invention;

fig. 8 is a side schematic view of fig. 7.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

Example 1

The present embodiment provides a fire-proof check valve including a valve housing 10, a valve seat 20, and a valve flap 30, the valve housing 10 being installed on a residential exhaust duct 40 and located outside the residential exhaust duct 40, as shown in fig. 1.

As shown in fig. 2 to 5, the valve housing 10 is used for providing an exhaust passage and is connected with an inlet 41 of a residential exhaust duct 40, the valve seat 20 is arranged on the valve housing 10 and is positioned at an inlet side of the exhaust passage, and the valve flap 30 is rotatably arranged on the valve housing 10 and is matched with the valve seat 20 to open or close the exhaust passage, wherein the valve flap 30 can be a single-flap circular, a half-square semicircular or a square disc shape, and correspondingly, the valve flap 30 is provided with a sealing ring 31 for forming a sealing fit with the valve seat 20.

In the present embodiment, the valve seat 20 is inclined downward along the side facing the intake of the exhaust passage, and the intake pipe 50 is provided on the valve seat 20, and the intake pipe 50 is preferably inclined in the same direction as the valve seat 20, so that the gas enters the exhaust passage from the intake pipe 50 with an inclined upward flow direction.

Specifically, the included angle α between the plane of the valve seat 20 and the vertical plane is not more than 60 °, preferably, the included angle α between the plane of the valve seat 20 and the vertical plane is 10 ° to 30 °, for example, the included angle α between the plane of the valve seat 20 and the vertical plane shown in fig. 4 is 13 °.

Further, in order to facilitate quick discharge of gas, the valve casing 10 in the embodiment is a diversion type valve casing, the valve casing 10 is provided with a top wall plate 11, the top wall plate 11 is located on the upper side of the valve clack 30, wherein gas flowing through the top wall plate 11 at least partially keeps the original flow direction thereof, and then flue gas entering the valve casing 10 can directly flow upwards when being discharged, on the one hand, flue gas going out from the valve casing 10 (exhaust passage) can be directly converged with airflow in the house exhaust passage 40, on the other hand, the exhaust speed of the flue gas can be kept, and therefore the flue gas can be smoothly discharged.

Still further, the angle β formed between the top wall plate 11 and the valve seat 20 exceeds 90 °, i.e. the angle between the top wall plate 11 and the horizontal plane is also included to keep the gas entering the valve housing 10 obliquely discharged upwards, as shown in fig. 4-5, in this embodiment the angle β formed between the top wall plate 11 and the valve seat 20 is 110 °.

The valve seat 20 of the present embodiment is provided with a circular ring seat 21 which is matched with the valve flap 30 to form a sealing connection, the valve flap 30 covers the circular ring seat 21, wherein an air inlet pipe 50 is formed by extending from the inner edge of the circular ring seat 21 along the air inlet side facing the exhaust passage, so that all the gas exhausted from the air inlet pipe 50 directly enters the exhaust passage.

Wherein the gas entering the valve housing 10 through the gas inlet pipe 50 is not blocked at all and can directly enter the valve housing 10 in its entirety and finally be discharged.

Specifically, the air inlet pipe 50 is perpendicular to the annular seat 21.

In which the valve housing 10 has a front end plate 12, the annular seat 21 is recessed in the direction opposite to the direction of the air flow to form a groove-shaped seat, and the outer edge of the valve flap 30 completely covers the annular seat 21, in other examples of the invention the annular seat 21 may also form a convex seat protruding from the front end plate 12 in the direction of the air flow.

The valve housing 10 in this embodiment also has two side wall plates 13, the two side wall plates 13 being located on the left and right sides of the top wall plate 11, respectively, wherein the open valve flap 30, the two side wall plates 13 and the top wall plate 11 form a flow directing channel to direct the gas entering therein to flow obliquely upwards, as shown in fig. 5.

The two side wall plates 13, the top wall plate 11 and the opened valve clack 30 form a nearly closed flow guide channel, and after gas flowing in from the air inlet pipe 50 and the valve seat 20 enters the flow guide channel, the gas is naturally and smoothly discharged upwards into the residential exhaust passage, and no turbulence or vortex phenomenon exists at the air inlet of the residential exhaust passage. Preferably, where a circular flap is used, a square baffle 32 with a range may be provided behind the flap 30, as shown in figure 3, to direct the gas obliquely upwards and not towards the other direction.

In this embodiment, the residential exhaust duct 40 is supported and fixed by a building wall 60 and a building floor 70, an air inlet 41 is provided on the residential exhaust duct 40, a valve housing 10 is installed outside the air inlet 41, and specifically, the air inlet pipe 50 is connected with a range hood or an exhaust fan through an exhaust branch pipe 80 to exhaust indoor smoke.

The valve seat 20 and the air inlet pipe 50 are inclined downwards, and the exhaust branch pipe 80 connected with the valve seat and the air inlet pipe is also inclined downwards, so that the exhaust branch pipe 80 is prevented from bending downwards, oil stains accumulated in the exhaust branch pipe 80 can be discharged in time, and the airflow wind resistance of the exhaust branch pipe 80 is reduced; meanwhile, in the process that the smoke of the range hood or the exhaust fan flows into the residential exhaust duct 40, the smoke does not need to turn through a 90-degree right angle, so that the wind resistance is small, and the smoke discharge effect is very good.

The above is not mentioned, and is applicable to the prior art, such as a fire-proof actuator that is activated in case of fire to close and lock the flap in the closed position, and the description of the embodiment is omitted.

Example 2

The present embodiment provides a fire-proof check valve, which further includes an opening and closing mechanism 90 for opening and closing the valve flap 30 based on embodiment 1.

As shown in fig. 6 to 8, the opening and closing mechanism 90 includes a holder 91, a valve shaft 92, a first torsion spring 93, a second torsion spring 94, and a tower spring 95.

Wherein support 91 sets up on the bottom wall board of valve casing 10, and valve shaft 92 sets up on support 91, and first torsional spring 93 and second torsional spring 94 all overlap on valve shaft 92, and tower spring 95 sets up on support 91, and it is located the back side of valve clack 30 and inclines towards valve clack 30.

Specifically, the original angle between the two torsion legs of the second torsion spring 94 is smaller than the original angle between the two torsion legs of the first torsion spring 93, and the valve flap 30 opened to the set angle abuts against the movable torsion legs of the second torsion spring 94 and compresses the second torsion spring 94.

Preferably, as shown, the fixed torsion leg of the first torsion spring 93 and the fixed torsion leg of the second torsion spring 94 are fixedly connected to facilitate a "relay" operation.

Wherein the first torsion spring 93 is always in a compressed state.

In this embodiment, a setting angle of the valve flap 30 against the second torsion spring 94 is adjustable, and the setting angle may be, for example, when three torsion springs are used in another preferred example, the setting angle may also be, for example, an angle that can be specifically adjusted to a proper size according to the type of the elastic acting force of the torsion springs to meet the design requirement.

As is well known, the variation of the acting force of the single elastic member is balanced during the opening process of the valve flap 30 (i.e. the stiffness coefficient of the elastic member is constant), while the variation of the gravitational moment of the valve flap 30 is unbalanced along with the variation of the opening angle during the opening process, which is a main contradiction point that the prior art is difficult to satisfy that the valve flap 30 is opened smoothly and the valve flap 30 is closed smoothly; in the embodiment, a plurality of elastic pieces are adopted to form a relay-like effect, so that the main contradiction can be effectively solved.

More specifically, in this embodiment, the valve flap 30 that is nearly fully opened can be contacted with the tower spring 95, and at this time, except that the tower spring 95 indicated in the embodiment realizes a relay effect, the maximum opening angle of the valve flap 30 can be changed by adjusting the contact position of the tower spring 95 and the valve flap 30, so as to adapt to the opening angles required by different floors.

The inclined valve seat 20 in this embodiment can provide gravity closing effect for the closed valve flap 30, so as to be beneficial to forming better sealing by matching with the first torsion spring 93 after the exhaust is completed; meanwhile, when the valve flap 30 is opened at a certain angle (the valve flap 30 is in a vertical position), the gravity of the valve flap 30 is opposite to the resilience acting force of the first torsion spring 93, so that the opening of the valve flap 30 can be aggravated by overcoming the action of the first torsion spring 93, and the continuously opened valve flap 30 can compress the second torsion spring 94, which is beneficial for the valve flap 30 to have a larger opening angle.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Claims

1. The utility model provides a fire prevention check valve, its characterized in that includes valve casing, valve seat and valve clack, the valve casing is installed on the house exhaust passage and is located the outside of house exhaust passage, the valve casing is used for providing exhaust passage and is connected with the air inlet of house exhaust passage, the valve seat set up in on the valve casing and be located the one side of admitting air of this exhaust passage, the valve clack rotate set up in on the valve casing and with the valve seat cooperation is opened or is closed this exhaust passage, wherein the plane of valve seat place inclines downwards towards the one side of admitting air of exhaust passage, be equipped with the intake pipe on the valve seat to gas has the ascending flow direction of slope when getting into this exhaust passage in the intake pipe.

2. A fire resistant check valve as claimed in claim 1, wherein the angle between the plane of the seat and the vertical is not more than 60 °.

3. A fire resistant check valve as claimed in claim 2, wherein the angle between the plane of the valve seat and the vertical is in the range 5 ° to 20 °.

4. The fire protection check valve of claim 1, wherein said valve seat is provided with an annular seat which is engaged with said valve flap to form a sealing connection, said valve flap being covered on said annular seat, wherein said air intake duct is formed to extend from an inner edge of said annular seat toward an air intake side, so that all of the gas discharged from said air intake duct directly enters the discharge passage.

5. A fire protection check valve as claimed in claim 4, wherein said air inlet tube is perpendicular to said annular seat.

6. The fire resistant check valve of claim 4 wherein said valve housing has a front end plate, said annular seat being recessed in a direction opposite to the direction of air flow to form a contoured seat, or projecting in a direction of air flow from said front end plate to form a contoured seat, said flap overlying said annular seat.

7. The fire resistant check valve of claim 1, wherein said valve housing is a flow-directing valve housing having a top wall plate positioned on an upper side of said valve flap, wherein gas flowing through said top wall plate at least partially maintains its original flow direction.

8. The fire resistant check valve of claim 7 wherein the included angle formed between said top wall panel and said valve seat exceeds 90 °.

9. The fire resistant check valve of claim 1, further comprising an opening and closing mechanism for opening and closing the flap, the opening and closing mechanism comprising:

a first torsion spring which is provided on the valve shaft and is always in a state of being compressed by the valve flap;

when the valve clack is opened to a set angle value during exhaust, the valve clack can be abutted against the second torsion spring and compresses the second torsion spring.

10. The fire resistant check valve of claim 9, wherein the set angle value of the valve flap against the second torsion spring ranges from 10 ° to 30 °, and the angle between the valve seat and the vertical surface is smaller than the set angle value.