Ventilation pipe fire retardant device

Abstract

The utility model discloses a ventilation pipe fire-retardant device, which relates to the technical field of ventilation pipes, and comprises a ventilation pipe, two tuyere baffle tongues are arranged at the middle position of the inner wall of the ventilation pipe, and the two tuyere baffle tongues are arranged at the middle position of the inner wall of the ventilation pipe and can swing. A hexagon-headed bolt is installed in the middle of the ventilation pipe, the hexagon-headed bolt penetrates through the central axis of the ventilation pipe and extends out of the outer wall of the ventilation pipe, and a hexagon flange face locking nut is installed at the top end, extending out of the outer wall of the ventilation pipe, of the hexagon-headed bolt. When the temperature of the pipeline rises continuously due to fire or other reasons and reaches more than 68 DEG C, the fusing plate can fuse automatically (the fusing point of the fusing plate is low), at the moment, the fusing buckle fixing plates on the surfaces of the two normally-open tuyere blocking tongues are fixed through the fusing plate, then the torsion spring works rapidly, and the temperature of the pipeline rises continuously. The two tuyere blocking tongues are assisted to be closed, fire disasters are prevented from occurring or spreading, and the blocking and protecting effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation pipes, in particular to a ventilation pipe fire arrester. Background Art

[0002] With the development of modern industry, the probability of fire has greatly increased. In the event of a fire, the flames can be transmitted through pipes into the interior of the equipment, causing secondary or even more powerful explosions. Fire arresters can prevent fire from entering the interior, avoiding "secondary" combustion or explosion accidents, thereby reducing the risk of fire damage. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a ventilation pipe fire arrester to solve the technical problem that when a fire occurs, the flames generated will be transmitted through the pipe to the inside of the equipment, causing secondary or even more powerful explosions.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] A ventilation duct fire-blocking device includes a ventilation duct, which is arranged as a circular tube structure. An air outlet tongue is installed in the middle of the inner wall of the ventilation duct. The air outlet tongue is provided with two pieces, which are arranged in the middle of the inner wall of the ventilation duct and can swing.

[0006] As an optimal technical solution of the present invention, a hexagonal head bolt is installed in the middle of the ventilation pipe, and the hexagonal head bolt passes through the central axis of the ventilation pipe and extends to the outer wall of the ventilation pipe. A hexagonal flange locking nut is installed on the top of the hexagonal head bolt extending out of the outer wall of the ventilation pipe.

[0007] As an optimal technical solution of the present invention, the two air outlet tongues arranged in the middle of the inner wall of the ventilation duct are rotatably connected to the hexagonal bolt rod, and each air outlet tongue is a half-arc plate structure.

[0008] As an optimal technical solution of the present invention, a torsion spring is installed on the outer wall of the hexagonal head bolt, and the two air outlet tongues in the middle position of the inner wall of the ventilation pipe automatically rebound and expand through the torsion spring.

[0009] As a preferred technical solution of the present invention, a fuse fixing plate is fixedly mounted on the surface of each of the air outlet tongues.

[0010] As an optimal technical solution of the present invention, a fuse plate is connected between the fuse button fixing plates arranged on the surfaces of the two air outlet tongues, and the two air outlet tongues arranged in the middle position of the inner wall of the ventilation pipe are fixed to be normally open through the fuse plate.

[0011] After the ventilation duct fire arrester of this utility model is assembled, under normal conditions, the air outlet flap is in the normally open position in the middle of the inner wall of the ventilation duct, allowing smooth ventilation of the ventilation duct. When a fire occurs in the duct or other reasons cause the temperature to continue to rise, and the duct temperature reaches above 68°C, the fuse plate (which has a low melting point) will automatically melt. At this time, the fuse fixing plates on the surfaces of the two normally open air outlet flaps are fixed by the fuse plate, and the torsion spring quickly operates to assist the two air outlet flaps to close, preventing the occurrence or spread of fire, thereby achieving a blocking and protective effect.

[0012] The utility model has a quick response and can control the fire in its infancy to avoid causing greater losses; it is easy and concealed to install without affecting the appearance; it has a high degree of automation and does not require manual intervention; and it has a wide range of applications.

[0013] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the appearance and structure of the ventilation pipe fire arrester of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the ventilation pipe fire arrester of the utility model from the left side;

[0016] Figure 3 This utility model specification is attached Figure 2 AA direction cross-sectional structure diagram;

[0017] Figure 4 This is a schematic diagram of the structure of the hexagonal flange locking nut of the utility model on the outer wall of the ventilation pipe;

[0018] In the figure: 1. Ventilation duct; 2. Air outlet tongue; 3. Torsion spring; 4. Fuse plate; 5. Hexagonal head bolt; 6. Hexagonal flange lock nut; 7. Fuse buckle fixing plate. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0022] In the above description of the present invention, it should be noted that the terms "one side" and "the other side" and the like indicate positions or locations based on the positions or locations shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0023] Furthermore, the term "identical" and similar terms do not necessarily require that the components be absolutely identical; slight variations are permitted. The term "perpendicular" simply refers to the positional relationship between components being more perpendicular than "parallel," not that the structure must be perfectly vertical; rather, it can be slightly tilted. Example 1

[0024] See also Figure 1-3 , which is a technical solution provided by the utility model: a ventilation pipe fire-blocking device, including a ventilation pipe 1, which is configured as a circular tube structure, and an air outlet tongue 2 is installed in the middle position of the inner wall of the ventilation pipe 1. The air outlet tongue 2 is provided with two pieces, and the two air outlet tongues 2 are arranged in the middle position of the inner wall of the ventilation pipe 1 and can swing.

[0025] After the ventilation duct fire arrester of the utility model is assembled, under normal conditions, the air outlet flaps are in the normally open position in the middle of the inner wall of the ventilation duct, and the ventilation duct can be ventilated smoothly. When a fire occurs in the pipeline or other reasons cause the temperature to continue to rise, the two air outlet flaps close to prevent the fire from occurring or spreading, thus playing a blocking and protective role. Example 2

[0026] See also Figure 1-4 , which is another technical solution provided by the present utility model. This embodiment is similar to the above-mentioned embodiment 1, and the similarities are not elaborated in this embodiment. The specific differences are:

[0027] A ventilation duct fire-blocking device includes a ventilation duct 1, which is arranged as a circular tube structure. An air outlet tongue 2 is installed in the middle of the inner wall of the ventilation duct 1. The air outlet tongue 2 is provided with two pieces. The two air outlet tongues 2 are arranged in the middle of the inner wall of the ventilation duct 1 and can swing.

[0028] After the ventilation duct fire arrester of the utility model is assembled, under normal conditions, the air outlet tongue is in the normally open position in the middle of the inner wall of the ventilation duct, and the ventilation duct can be ventilated smoothly. When a fire occurs in the pipeline or other reasons cause the temperature to continue to rise, and the pipeline temperature reaches above 68°C, the fuse plate will automatically melt. The fuse plate has a low melting point and the fuse fixing plate on the surface of the normally open air outlet tongue is fixed by the fuse plate. Then, the torsion spring quickly operates to assist the two air outlet tongues to close, preventing the occurrence or spread of fire, thereby playing a blocking and protective role.

[0029] A hexagonal head bolt 5 is installed in the middle of the ventilation pipe 1. The hexagonal head bolt 5 passes through the central axis of the ventilation pipe 1 and extends to the outer wall of the ventilation pipe 1. A hexagonal flange locking nut 6 is installed on the top of the hexagonal head bolt 5 extending from the outer wall of the ventilation pipe 1. The hexagonal flange locking nut 6 is used to lock the installation position of the hexagonal head bolt 5 in the middle of the ventilation pipe 1.

[0030] The two air vent tongues 2 arranged in the middle position of the inner wall of the ventilation pipe 1 are rotatably connected to the hexagonal head bolt 5 rod. Each air vent tongue 2 is a half-arc plate structure, which makes it easier for the two air vent tongues 2 to fit better with the inner wall of the ventilation pipe 1 when closed, thereby improving the fire-retardant effect.

[0031] A torsion spring 3 is mounted on the outer wall of the hexagonal bolt 5. The torsion spring is of suitable length and flexible, allowing the two air vent tongues 2 in the middle of the inner wall of the ventilation pipe 1 to automatically rebound and expand. The torsion spring 3 is sensitive, responsive, and has a strong rebound force, which can control the fire in its infancy and prevent further damage.

[0032] A fuse fixing plate 7 is fixedly mounted on the surface of each air outlet tongue 2 .

[0033] The fuse plate 4 is connected between the fuse button fixing plates 7 provided on the surfaces of the two air vent tongues 2. The two air vent tongues 2 provided in the middle of the inner wall of the ventilation duct 1 are fixed to be normally open by the fuse plate 4. The fuse plate 4 of the utility model can be selected according to the fire protection requirements.

[0034] After the ventilation duct fire arrester of the utility model is assembled, under normal conditions, the air outlet tongue is in the normally open position in the middle of the inner wall of the ventilation duct, and the ventilation duct can be ventilated smoothly. When a fire occurs in the pipeline or other reasons cause the temperature to continue to rise, and the pipeline temperature reaches above 68°C, the fuse plate will automatically melt. The fuse plate has a low melting point and the fuse fixing plate on the surface of the normally open air outlet tongue is fixed by the fuse plate. Then, the torsion spring quickly operates to assist the two air outlet tongues to close, preventing the occurrence or spread of fire, thereby playing a blocking and protective role.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A ventilation pipe fire arrester, comprising a ventilation pipe (1), characterized in that: The ventilation pipe (1) is configured as a circular pipe structure, and an air outlet tongue (2) is installed in the middle of the inner wall of the ventilation pipe (1). The air outlet tongue (2) is provided with two pieces, and the two pieces of the air outlet tongue (2) are arranged in the middle of the inner wall of the ventilation pipe (1) and can swing. A hexagonal bolt (5) is installed in the middle of the ventilation pipe (1), and the hexagonal bolt (5) passes through the central axis of the ventilation pipe (1) and extends toward the outer wall of the ventilation pipe (1), and a hexagonal flange locking nut (6) is installed at the top end of the hexagonal bolt (5) extending from the outer wall of the ventilation pipe (1); Two pieces of the air outlet tongue (2) arranged in the middle position of the inner wall of the ventilation pipe (1) are rotatably connected to the hexagonal head bolt (5) rod, and each piece of the air outlet tongue (2) is a half-piece arc plate structure; A torsion spring (3) is installed on the outer wall of the hexagonal bolt (5), and the two air outlet tongues (2) at the middle position of the inner wall of the ventilation pipe (1) automatically rebound and expand through the torsion spring (3).

2. A ventilation pipe fire arrester according to claim 1, characterized in that: A fuse button fixing plate (7) is fixedly mounted on the surface of each of the air outlet tongues (2).

3. A ventilation pipe fire arrester according to claim 2, characterized in that: A fuse plate (4) is connected between the fuse button fixing plates (7) arranged on the surfaces of the two air outlet tongues (2), and the two air outlet tongues (2) arranged in the middle of the inner wall of the ventilation pipe (1) are fixed to be normally open through the fuse plate (4).

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