An external diversion type fire-proof check valve

Abstract

The present invention provides an external flow-guiding fire-proof check valve, comprising a valve body and a valve flap, wherein the valve body is mounted on a residential exhaust duct and is located outside the residential exhaust duct, the valve body comprises a valve housing and a valve seat, the valve housing is used to provide an exhaust passage, the valve seat is arranged on the valve housing and is located on the air inlet side of the exhaust passage, the air outlet side of the exhaust passage is connected with the air inlet of the residential exhaust duct, the valve flap is rotatably arranged on the valve housing and cooperates with the valve seat to open or close the exhaust passage, wherein the valve housing is provided with a flow-guiding portion, and the flow-guiding portion cooperates with the opened valve flap to guide the gas to be discharged obliquely upward from the air outlet side of the exhaust passage. The present invention places the fire-proof check valve as a whole completely outside the residential exhaust duct, does not occupy the internal space of the residential exhaust duct, does not hinder the smoke discharge of the residential exhaust duct, and has the advantages of small system wind resistance and good smoke discharge effect.

Description

Technical Field

[0001] The invention belongs to the technical field of residential exhaust ducts, and in particular relates to an external flow-guiding type fire-proof check valve. Background Art

[0002] The fire check valve is an important component of the residential exhaust duct system. Its main function is to guide the indoor smoke of the residents to flow upward into the residential exhaust duct and prevent the smoke from flowing back. At the same time, it is equipped with a fire protection actuator to ensure fire safety.

[0003] The fire check valve in the prior art is an internal guide type fire check valve, which is installed at the air inlet of a residential exhaust duct. Its guide part is mainly located inside the residential exhaust duct and needs to occupy a certain internal space of the residential exhaust duct. For example, Chinese patent application 2016106548305 discloses a fire check valve, including a body, a valve plate and a connecting mechanism. The body is provided with an exhaust port, and the valve plate cover is provided on the exhaust port. The body and the valve plate are connected by a connecting mechanism. The fire check valve also includes a fixing part and a flexible part for reducing the force of the valve plate hitting the body, one end of the fixing part is connected to the valve plate, and the other end of the fixing part squeezes the flexible part and clamps the flexible part between the fixing part and the valve plate.

[0004] For another example, Chinese patent application 2018112855827 discloses a fireproof check valve, comprising a valve body having an exhaust port and a valve plate for covering the exhaust port, wherein the inner periphery of the valve plate has an annular joining area for sealingly joining the exhaust port, and the inner side of the valve plate is connected to at least a portion of the inner edge of the annular joining area along the inner side of the valve plate with a guide plate extending into the interior of the valve body.

[0005] The above-mentioned prior art mainly has the following defects: 1) Occupying the internal space of the residential exhaust duct will lead to obstruction of the smoke emission of the residential exhaust duct, large system wind resistance and poor smoke emission effect; 2) It is easy to be blocked by construction waste, resulting in failure of the fire check valve; 3) The oil stains accumulated inside the residential exhaust duct are not easy to clean, and the oil stains accumulated on the surface of the residential exhaust duct pose a fire safety hazard.

[0006] Therefore, improvements are needed. Summary of the invention

[0007] In view of the defects of the prior art, the present invention provides an external guide fire check valve. The fire check valve is completely placed outside the residential exhaust duct, does not occupy the internal space of the residential exhaust duct, does not hinder the smoke emission of the residential exhaust duct, and has the advantages of small system wind resistance and good smoke emission effect.

[0008] In order to achieve the above-mentioned purpose, the present invention provides an external guide fire check valve, including a valve body and a valve flap, the valve body is installed on a residential exhaust duct and is located outside the residential exhaust duct, the valve body includes a valve shell and a valve seat, the valve shell is used to provide an exhaust channel, the valve seat is arranged on the valve shell and is located on the air inlet side of the exhaust channel, the air outlet side of the exhaust channel is connected to the air inlet of the residential exhaust duct, the valve flap is rotatably arranged on the valve shell and cooperates with the valve seat to open or close the exhaust channel, wherein the valve shell is provided with a guide portion, the guide portion cooperates with the opened valve flap to guide the gas to be discharged obliquely upward from the air outlet side of the exhaust channel.

[0009] In the above technical solution of the present invention, the valve body is installed on the outside of the residential exhaust duct and provides an exhaust channel. The opening and closing of the exhaust channel is realized by the cooperation of the valve flap and the valve seat. The valve flap is opened when smoke and exhaust are required, and the valve flap is closed after the smoke and exhaust are completed. A sealing cooperation is formed between the valve flap and the valve seat to prevent smoke backflow and avoid the occurrence of smoke and odor cross-flow.

[0010] Furthermore, a guide portion is provided on the valve housing, which can guide the smoke in the household room to be discharged obliquely upward, which is basically consistent with the flow direction of the smoke in the residential exhaust duct, thereby preventing turbulence and air curtain from forming at the air inlet of the exhaust duct, and greatly reducing the wind resistance of the residential exhaust duct system.

[0011] As another specific embodiment of the present invention, the guide portion includes at least one guide plate, which is located on the upper side of the valve flap and is inclined upward along the exhaust direction of the exhaust passage.

[0012] As another specific implementation scheme of the present invention, the angle between the plane where the guide plate is located and the horizontal plane does not exceed 75°.

[0013] As another specific implementation scheme of the present invention, the angle between the plane where the guide plate is located and the horizontal plane is 20° to 40°, so as to improve the efficiency of guide on the basis of achieving guide, so that the gas discharged through the exhaust channel can quickly and naturally enter the residential exhaust duct and finally be discharged from the roof.

[0014] As another specific embodiment of the present invention, the valve housing has two side wall plates, which are respectively located on the left and right sides of the guide plate, wherein the opened valve flap, the two side wall plates and the guide plate form a guide channel to guide the gas entering therein to flow obliquely upward.

[0015] As another specific embodiment of the present invention, the valve housing has a bottom wall plate, a valve shaft is arranged on the bottom wall plate, and the valve flap is rotatably arranged on the valve housing through the valve shaft.

[0016] As another specific embodiment of the present invention, the plane where the valve seat is located is inclined downward toward the air inlet side of the exhaust passage, so that the gas entering the exhaust passage through the valve seat has an inclined upward flow direction.

[0017] As another specific embodiment of the present invention, the angle between the plane where the valve seat is located and the vertical plane does not exceed 60°.

[0018] As another specific implementation scheme of the present invention, the angle between the plane where the valve seat is located and the vertical plane is 5° to 20°.

[0019] As another specific embodiment of the present invention, the valve body further comprises a flange skirt, which is arranged on the valve housing and located at the air outlet side of the exhaust passage, and is used to be connected to the air inlet of the residential exhaust duct.

[0020] The present invention has the following beneficial effects:

[0021] The fire-proof check valve of the present invention is located outside the exhaust duct as a whole, does not occupy the internal space of the residential exhaust duct at all, does not hinder the smoke emission of the residential exhaust duct, and no flow guide structure exists in the entire residential exhaust duct, so that the smoke is discharged unimpeded, and the overall wind resistance of the residential exhaust duct system is small and the smoke emission effect is good;

[0022] The fire-proof check valve of the present invention will not be affected by building construction after installation, and the fire-proof check valve installed outside the exhaust duct of a residential building will not be blocked or damaged by building construction waste.

[0023] The oil stains accumulated inside the exhaust duct of a house using the fireproof check valve of the present invention can be easily cleaned, thereby reducing the potential safety hazard caused by the oil stains accumulated on the outer surface of the exhaust duct of the house.

[0024] In addition, the valve seat of the fire-proof check valve of the present invention is tilted, and the exhaust branch pipe connected thereto is also tilted downward, which is beneficial to prevent the exhaust branch pipe from bending downward, and can timely remove the oil stains accumulated in the exhaust branch pipe, thereby reducing the airflow resistance of the exhaust branch pipe; at the same time, when the smoke from the range hood or exhaust fan flows into the residential exhaust duct, it does not need to make a 90° right-angle turn, so the wind resistance is small and the smoke emission effect is good.

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an installation diagram of embodiment 1 of the present invention;

[0027] Figure 2 The structure of the fire check valve of Example 1 of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 3 The structure of the fire check valve of Example 1 of the present invention is shown in FIG. Figure 2 ;

[0029] Figure 4is a schematic structural diagram of a valve body in Embodiment 1 of the present invention;

[0030] Figure 5 Schematic diagram of exhaust after the valve flap is opened in Example 1 of the present invention;

[0031] Figure 6 is a side schematic diagram of a valve body of Embodiment 1 of the present invention;

[0032] Figure 7 It is a schematic structural diagram showing another guide plate in Example 1 of the present invention. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0035] The up, down, left and right in the present invention are all based on the vertical installation of the residential exhaust duct. It should be understood that the fire check valve in the present invention can change its installation direction in specific application scenarios and is not limited to the direction shown in the drawings of the specification.

[0036] Example 1

[0037] The present invention provides an external flow-guiding fire-proof check valve 100, such as Figure 1 As shown, the fire check valve 100 is installed on the residential exhaust duct 200 and is located outside the residential exhaust duct 200 .

[0038] The residential exhaust duct 200 is supported and fixed by a building wall 300 and a building floor 400, an air inlet 201 is provided on the residential exhaust duct 200, and a fire check valve 100 is installed on the outside of the air inlet 201. Specifically, the air inlet side of the fire check valve 100 is connected to a range hood 600 or an exhaust fan through an exhaust branch pipe 500 to exhaust indoor smoke.

[0039] The present embodiment creatively arranges the fire check valve 100 on the outside of the residential exhaust duct 200, and there is no need to modify the original residential exhaust duct. It does not occupy the internal space of the residential exhaust duct 200 at all, and will not hinder the smoke emission of the residential exhaust duct 200. There is no guide structure in the entire residential exhaust duct 200, so that unimpeded smoke emission is achieved. The overall wind resistance of the residential exhaust duct 200 system is small and the smoke emission effect is good.

[0040] like Figure 2-6 As shown, the fire check valve 100 of this embodiment includes a valve body 110 and a valve flap 120 .

[0041] The valve body 110 includes a flange skirt 130, a valve shell 140, a valve seat 150 and an air inlet pipe 160. The valve shell 140 is used to provide an upwardly inclined exhaust passage. The valve seat 150 is arranged on the valve shell 140 and is located on the air inlet side of the exhaust passage. The flange skirt 130 is arranged on the valve shell 140 and is located on the air outlet side of the exhaust passage, wherein the flange skirt 130 is used to connect with the air inlet 201 of the residential exhaust duct 200 for smoke exhaust.

[0042] Correspondingly, a bracket structure 141 for installation is also provided on the valve housing 140 to form a sealed fitting connection between the flange skirt 130 and the air inlet 201 of the residential exhaust duct 200 . Correspondingly, a sealing gasket can also be provided at the flange skirt 130 .

[0043] The valve flap 120 is rotatably disposed on the valve housing 140 and cooperates with the valve seat 150 to open or close the exhaust passage, so that the valve flap 120 is opened when smoke and gas exhaust is required, and the valve flap 120 is closed when smoke and gas exhaust is completed.

[0044] In this embodiment, the valve flap 120 adopts a single-flap rotating form. In other preferred embodiments, it can be improved according to design requirements and is not limited here. Specifically, Figure 3 As shown, in this embodiment, the valve housing 140 has a bottom wall plate 142, and a valve shaft 121 is provided on the bottom wall plate 142. The valve flap 120 is rotatably arranged on the valve housing 140 through the valve shaft 121. Correspondingly, a fire protection actuator 170 is provided on the back side of the valve flap 120, that is, when a fire occurs, the valve flap 120 is locked on the valve seat 150 through the fire protection actuator and is always in a closed position. The specific structure of the fire protection actuator 170 is no longer limited here.

[0045] The valve housing 140 is provided with a guide portion 143, which cooperates with the opened valve flap 120 to guide the gas to be discharged obliquely upward from the outlet side of the exhaust channel. The guide portion 143 includes at least one guide plate 144, which is located on the upper side of the valve flap 120 and is obliquely upward along the exhaust direction of the exhaust channel.

[0046] Specifically, the guide plate 144 in this embodiment serves as the top wall plate of the valve housing 140. In other examples, the guide plate 144 may be specially provided in the inner space of the valve housing 140 to guide the gas to be discharged obliquely upwards, such as Figure 7 shown.

[0047] like Figure 4 As shown, the angle α between the plane where the guide plate 144 is located and the horizontal plane does not exceed 75°. Preferably, the angle α between the plane where the guide plate 144 is located and the horizontal plane is 20° to 40°, so as to improve the efficiency of diversion on the basis of achieving diversion, so that the gas discharged through the exhaust channel can quickly and naturally enter the residential exhaust duct 200 and finally be discharged from the roof to achieve high-altitude discharge.

[0048] In this embodiment, the angle α between the plane where the guide plate 144 is located and the horizontal plane is 30°.

[0049] Furthermore, in this embodiment, the valve housing 140 has two side wall plates 145, and the two side wall plates 145 are respectively located on the left and right sides of the guide plate 144, wherein the opened valve flap 120, the two side wall plates 145 and the guide plate 144 form a guide channel to guide the gas entering therein to flow obliquely upward, such as Figure 5 shown.

[0050] A nearly closed upward inclined flow guide channel is formed between the two side wall plates 145, the flow guide plate 144 and the opened valve flap 120. After the gas flowing in from the air inlet pipe 160 and the valve seat 150 enters the flow guide channel, it is naturally and smoothly discharged upward into the residential exhaust duct, and there is no turbulence or eddy flow at the air inlet of the residential exhaust duct. Preferably, when a circular valve flap 120 is used, a rectangular baffle 122 can be set behind the valve flap 120, such as Figure 3 As shown, a nearly closed, upwardly inclined exhaust passage is formed to guide the smoke to flow upwardly inclined and prevent the smoke from flowing in other directions. Similarly, the square baffle 122 can also be directly set on the valve housing 140 to form a diversion effect without interfering with the opening of the valve flap 120.

[0051] In order to accelerate the discharge of gas and reduce the wind resistance of smoke and exhaust, the plane where the valve seat 150 is located in this embodiment is inclined downward toward the air inlet side of the exhaust channel, so that the gas entering the exhaust channel through the valve seat 150 has an inclined upward flow direction, such as Figure 5 shown.

[0052] The air intake pipe 160 is connected to the valve seat 150 in an upwardly inclined manner relative to the horizontal plane along the exhaust direction. At this time, the air flowing into the exhaust channel through the air intake pipe 160 can maintain its original flow direction, thereby realizing rapid smoke and exhaust exhaust. At the same time, the exhaust branch pipe 500 connected to the inclined air intake pipe 160 is also installed in an inclined manner, avoiding the need for the traditional exhaust branch pipe to be bent 90°, which is conducive to timely removal of oil accumulated in the exhaust branch pipe 500 and reducing the airflow resistance of the exhaust branch pipe 500.

[0053] Preferably, the air inlet pipe 160 and the valve seat 150 are perpendicular to each other.

[0054] In this embodiment, the angle β between the plane where the valve seat 150 is located and the vertical plane does not exceed 60°. Figure 4 As shown, preferably, the angle β between the plane where the valve seat 150 is located and the vertical plane is 5° to 20° to form an inclined upward flow of gas. The smoke in the resident's room flows smoothly through the air inlet pipe 160, the valve seat 150, and the exhaust channel (guide channel), and is discharged into the air inlet 201 of the residential exhaust duct 200 at an inclined upward angle, and the wind resistance of the whole process is greatly reduced.

[0055] In this embodiment, the angle β between the plane where the valve seat 150 is located and the vertical plane is 13°.

[0056] Specifically, the valve housing 140 has a front end plate 146 with the same inclination angle as the valve seat 150. The valve seat 150 is an annular seat that cooperates with the valve flap 120. The valve seat 150 is arranged on the front end plate 146 and is recessed toward the intake pipe 160 to form a groove-type seat. The valve flap 120 covers the groove-type seat to form a sealed connection.

[0057] The valve seat 150 and the air inlet pipe 160 are tilted downward, and the exhaust branch pipe 500 connected thereto is also tilted downward, which is beneficial to prevent the exhaust branch pipe 500 from bending downward, and can timely remove the oil stains accumulated in the exhaust branch pipe 500, thereby reducing the airflow resistance of the exhaust branch pipe 500; at the same time, when the smoke from the range hood 600 or the exhaust fan flows into the residential exhaust duct 200, it does not need to make a 90° right-angle turn, so the wind resistance is small and the smoke emission effect is good.

[0058] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, all equivalent improvements made according to the present invention should be covered by the scope of the present invention.

Claims

1. An external flow-guiding fire-proof check valve, comprising a valve body and a valve disc, characterized in that: The valve body is installed on the residential exhaust duct and is located outside the residential exhaust duct. The valve body includes a valve housing and a valve seat. The valve housing is used to provide an exhaust passage. The valve seat is arranged on the valve housing and is located on the air inlet side of the exhaust passage. The air outlet side of the exhaust passage is communicated with the air inlet of the residential exhaust duct. The valve flap is rotatably arranged on the valve housing and cooperates with the valve seat to open or close the exhaust passage, wherein the valve housing has a horizontal bottom wall plate, a valve shaft is arranged on the bottom wall plate, and the valve flap is rotatably arranged on the valve housing through the valve shaft; The plane where the valve seat is located is inclined downward toward the air inlet side of the exhaust passage, so that the gas entering the exhaust passage through the valve seat has an inclined upward flow direction; wherein the angle between the plane where the valve seat is located and the vertical plane is 5° to 20°; The valve housing is provided with a guide portion, and the guide portion cooperates with the opened valve flap to guide the gas to be discharged obliquely upward from the outlet side of the exhaust passage; the guide portion includes at least one guide plate, and the guide plate is located on the upper side of the valve flap, and is obliquely upward along the exhaust direction of the exhaust passage, wherein the angle between the plane where the guide plate is located and the horizontal plane is 20°~40°; The valve housing has two vertical side wall plates, which are respectively located on the left and right sides of the guide plate, wherein the opened valve flap, the two side wall plates and the guide plate form a guide channel and guide the gas entering the guide channel to flow obliquely upward; the valve flap is a circular valve flap, and a rectangular baffle is arranged behind the valve flap, and the rectangular baffle is arranged on the valve flap to guide the smoke to flow obliquely upward and prevent the smoke from flowing in other directions; the valve housing has a front end plate with the same inclination angle as the valve seat, and the valve seat is a circular ring seat matched with the valve flap, and the valve seat is arranged on the front end plate and is recessed toward the air inlet side of the exhaust channel to form a groove-shaped seat, and the valve flap covers the groove-shaped seat to form a sealed connection; The valve body also includes a flange skirt, which is arranged on the valve shell and located on the air outlet side of the exhaust channel, and is used to connect with the air inlet of the residential exhaust duct; wherein, a bracket structure for installation is also provided on the valve shell, and the bracket structure is used to form a sealed fitting connection between the flange skirt and the air inlet of the residential exhaust duct; a sealing gasket is provided at the flange skirt.

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