Fireproof check valve

Abstract

The utility model relates to the technical field of fireproof check valves, and discloses a fireproof check valve which comprises an installation assembly, a replacement assembly is arranged in the installation assembly, the installation assembly comprises a check valve body, one end of the check valve body is fixedly connected with an installation plate, the replacement assembly comprises an installation cylinder, and the inner wall of the installation cylinder is fixedly connected with a limiting ring. A limiting plate A is rotatably mounted on one side of the limiting ring; a limiting plate B is arranged beside the limiting plate A; the upper ends of the limiting plate A and the limiting plate B are fixedly connected with the fuse; one side of the upper end of each of the limiting plate A and the limiting plate B is fixedly connected with a group of springs; by arranging the mounting cylinder, when the temperature in the mounting cylinder is too high, the fuse is liquefied, a limiting plate A and a limiting plate B rotate to limit the fan blades through cooperation with a spring, the situation that the fan blades rotate to seal the mounting cylinder is prevented, and then the mounting cylinder is directly taken out and replaced with a new one.

Description

Technical Field

[0001] This utility model relates to the field of fireproof check valve technology, and in particular to a fireproof check valve. Background Technology

[0002] A fireproof check valve is a safety device installed in ventilation, air conditioning systems, or gas pipelines to effectively prevent the spread of flames and smoke in the event of a fire.

[0003] In the event of a fire, when the ambient temperature rises rapidly to the operating temperature of the fireproof material or the temperature sensing element, the existing fireproof check valve will undergo physical or chemical changes. For example, the fusible alloy will melt at a specific temperature, causing the components that were originally fixed by the fusible alloy to lose their restraint, thereby triggering the valve disc closing mechanism and causing the valve disc to close quickly.

[0004] However, most existing fireproof check valves have a fused valve body that is designed as a single unit. When the fused valve body is triggered, the entire check valve is usually replaced, but some parts of the valve body can still be used, which results in a certain waste of resources. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that in existing fireproof check valves, the fusible component and valve body are mostly designed as a single piece. After the fusible component is triggered, the entire check valve is usually replaced, but some parts of the valve body can still be used, which will cause a certain waste of resources. Therefore, a fireproof check valve is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fireproof check valve, including an installation assembly, a replacement assembly inside the installation assembly, the installation assembly including a check valve body, one end of the check valve body being fixedly connected to an installation plate, the replacement assembly including an installation cylinder, one end of the installation cylinder being threadedly connected to the inner surface of the check valve body, a limit ring being fixedly connected to the inner wall of the installation cylinder, the limit ring being fixedly installed on the inner wall of the installation cylinder, a pair of fan blades being rotatably installed on the limit ring, a fuse being installed in the middle of the limit ring, a limit plate A being rotatably installed on one side of the limit ring, a limit plate B being provided next to the limit plate A, the limit plate B being rotatably installed on one side of the limit ring, a fuse being fixedly connected to the upper end of both the limit plate A and the limit plate B, and a set of springs being fixedly connected to one side of the upper end of both the limit plate A and the limit plate B, one end of the springs being fixedly connected to the inner wall of the installation cylinder.

[0007] Preferably, a mounting ring is fixedly connected to the other side of the check valve body, and both the check valve body and the mounting ring are made of fire-resistant material;

[0008] It is used to facilitate the installation of indoor smoke exhaust pipes and check valve bodies together, and to increase the fire resistance of the entire device.

[0009] Preferably, the mounting plate has four sets of mounting holes.

[0010] This is designed to facilitate the installation of the entire device in the designated location by the operator.

[0011] Preferably, a sealing ring is fixedly connected to one side of the mounting plate, and the sealing ring is a component made of rubber material;

[0012] Used to increase the seal between the mounting plate and the wall to prevent oil fumes from overflowing from the contact surface during daily use.

[0013] Preferably, a baffle is fixedly connected to the inner wall of the mounting cylinder, and multiple anti-slip grooves are provided on the baffle;

[0014] This allows operators to easily rotate the mounting cylinder to remove it from the check valve body for replacement.

[0015] Preferably, a retaining ring is fixedly connected to the inner wall of the mounting cylinder, and the retaining ring is located on the other side of the limiting ring, and the retaining ring matches the fan blade;

[0016] Used to limit the operation of the fan blades, so that only indoor fumes can be discharged. When outdoor fumes move into the room, the baffle ring blocks the fan blades and seals the installation cylinder.

[0017] Preferably, the lower end of the limiting plate A is provided with a through groove, and the limiting plate B matches the through groove;

[0018] It is used to ensure that the limiting plate A and the limiting plate B do not block each other during movement, so that both can move normally.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model proposes a fireproof check valve. By setting up an installation cylinder, when the temperature inside the installation cylinder is too high, the fuse is liquefied. In conjunction with a spring, the limiting plates A and B rotate to limit the fan blades and prevent the fan blades from rotating and sealing the installation cylinder. Afterward, the installation cylinder can be directly removed and replaced with a new one. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the fireproof check valve of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of the fireproof check valve installation assembly of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the replacement component for the fireproof check valve of this utility model.

[0024] Figure 4This is a partial overall structural diagram of the replacement component of the fireproof check valve of this utility model.

[0025] Figure 5 This is an enlarged schematic diagram of point A of the fireproof check valve of this utility model;

[0026] Legend:

[0027] 1. Mounting components; 11. Check valve body; 111. Mounting ring; 12. Mounting plate; 121. Mounting hole; 13. Sealing ring; 2. Replacement components; 21. Mounting cylinder; 211. Baffle; 212. Anti-slip groove; 22. Retaining ring; 23. Limiting ring; 24. Fan blade; 25. Fuse; 26. Limiting plate A; 261. Through groove; 27. Limiting plate B; 28. Spring. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] Reference Figure 1-5 One embodiment of this utility model is a fireproof check valve, which includes an installation component 1. The installation component 1 is equipped with a replacement component 2. The installation component 1 includes a check valve body 11, which is connected to the indoor fume duct and then discharges the indoor fume. One end of the check valve body 11 is fixedly connected to an installation plate 12, so that the entire device can be easily installed in a designated position.

[0031] Replacement component 2 includes a mounting cylinder 21 for easy removal and replacement from the check valve body 11. One end of the mounting cylinder 21 is threaded to the inner surface of the check valve body 11. A limit ring 23 is fixedly connected to the inner wall of the mounting cylinder 21. The limit ring 23 is fixedly installed on the inner wall of the mounting cylinder 21. A pair of fan blades 24 are rotatably mounted on the limit ring 23 to facilitate opening or closing the check valve body 11. A sealing structure is also provided at the contact point between the fan blades 24 and the limit ring 23 to further enhance the sealing effect. A fuse 25 is installed in the middle of the limit ring 23. When exposed to high temperatures, the fuse liquefies and cancels its fixing of the limit plates A26 and B27. A limiting plate A26 is rotatably installed on one side, and a limiting plate B27 is set next to the limiting plate A26 to limit the fan blade 24. The limiting plate B27 is rotatably installed on one side of the limiting ring 23. The upper ends of the limiting plates A26 and B27 are both fixedly connected to fuses 25. A set of springs 28 are fixedly connected to one side of the upper end of the limiting plates A26 and B27. One end of the springs 28 is fixedly connected to the inner wall of the mounting cylinder 21. This not only allows the limiting plates A26 and B27 to move quickly, thus limiting the fan blade 24, but also limits the fan blade 24 during daily use to prevent the fan blade 24 from moving too much and causing backflow of oil fumes.

[0032] A mounting ring 111 is fixedly connected to the other side of the check valve body 11. Both the check valve body 11 and the mounting ring 111 are made of fire-resistant material, facilitating the installation of the exhaust duct and the check valve body 11 together. The mounting plate 12 has four sets of mounting holes 121, allowing for easy installation of the entire device in the designated position. A sealing ring 13 is fixedly connected to one side of the mounting plate 12. The sealing ring 13 is made of rubber material, increasing the seal between the mounting plate 12 and the mounting surface, thereby preventing oil fumes from overflowing. A baffle 211 is fixedly connected to the inner wall of the mounting cylinder 21. Multiple anti-slip grooves 212 are provided on the baffle 211 to facilitate the operator to rotate the installation cylinder 21 and remove it from the check valve body 11, making it convenient for regular cleaning or direct replacement. A retaining ring 22 is fixedly connected to the inner wall of the installation cylinder 21. The retaining ring 22 is located on the other side of the limiting ring 23. The retaining ring 22 matches the fan blade 24 to limit the operation of the fan blade 24 and prevent the backflow of external oil fumes. A through groove 261 is provided at the lower end of the limiting plate A26. The limiting plate B27 matches the through groove 261 so that the movement of the limiting plate A26 and the limiting plate B27 will not affect each other.

[0033] Working principle: First, the entire device is installed in the designated position by using fasteners such as expansion bolts through the mounting hole 121. Then, the mounting cylinder 21 is installed inside the check valve body 11. After that, the indoor exhaust pipe and the mounting ring 111 are connected together to start the exhaust operation. The indoor fumes will blow the fan blades 24 to rotate, thereby opening the mounting cylinder 21 to process and exhaust the fumes. When the external fumes backflow, the baffle ring 22 will limit the fan blades 24 to prevent them from rotating and thus block the external fumes.

[0034] When a fire starts inside the fume duct and spreads to the installation cylinder 21, the high temperature will cause the fuse 25 to melt, changing it from a solid to a liquid state. This cancels the fixing of the limit plate A26 and the limit plate B27, and then the fan blade 24 will rotate under the action of the spring 28, thus locking the installation cylinder 21 and preventing airflow between the installation cylinder 21 and the outside.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire rated check valve characterized by: The device includes an installation assembly, which internally houses a replacement assembly. The installation assembly includes a check valve body with a mounting plate fixedly connected to one end. The replacement assembly includes a mounting cylinder with one end threadedly connected to the inner surface of the check valve body. A limit ring is fixedly connected to the inner wall of the mounting cylinder, and the limit ring is rotatably mounted on the inner wall of the mounting cylinder. A pair of fan blades are rotatably mounted on the limit ring, and a fuse is installed in the middle of the limit ring. A limit plate A is rotatably mounted on one side of the limit ring, and a limit plate B is provided beside limit plate A. Limit plate B is rotatably mounted on one side of the limit ring. Fuses are fixedly connected to the upper ends of both limit plates A and B. A set of springs is fixedly connected to one side of the upper ends of both limit plates A and B, with one end of each spring fixedly connected to the inner wall of the mounting cylinder.

2. The fire-rated check valve of claim 1, wherein: A mounting ring is fixedly connected to the other side of the check valve body. Both the check valve body and the mounting ring are made of fire-resistant material.

3. The fire-rated check valve of claim 1, wherein: The mounting plate has four sets of mounting holes.

4. The fire-rated check valve of claim 1, wherein: A sealing ring is fixedly connected to one side of the mounting plate. The sealing ring is a component made of rubber material.

5. The fire-rated check valve of claim 1, wherein: A baffle is fixedly connected to the inner wall of the mounting cylinder, and multiple anti-slip grooves are formed on the baffle.

6. The fire-rated check valve of claim 1, wherein: A retaining ring is fixedly connected to the inner wall of the mounting cylinder. The retaining ring is located on the other side of the limiting ring and matches the fan blade.

7. The fire-rated check valve of claim 1, wherein: The lower end of the limiting plate A is provided with a through groove, and the limiting plate B is matched with the through groove.

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