Explosion-proof and fire-proof valve

Abstract

The utility model discloses an explosion-proof fireproof valve which comprises a valve body, four supporting rods are fixedly connected to the middle of the lower end of the valve body, a circular supporting plate is fixedly connected to the lower ends of the four supporting rods, a driving motor is fixedly connected to the middle of the upper end of the supporting plate, and a valve plate is rotationally connected to the inner wall of the valve body. A detection mechanism is fixedly connected to the lower end of the inner wall of the valve body, limiting mechanisms are symmetrically mounted in the middles of the two ends of the outer side of the valve body correspondingly, penetrate through the valve body and extend into the valve body, a mounting frame is fixedly connected to the upper end of the valve body, and a controller is fixedly connected to the lower end of the mounting frame. The lower end of the valve body is fixedly connected with supporting legs, and the supporting legs are located at the two ends of the valve body correspondingly. After the valve plate is controlled to be closed when explosion and fire occur in the pipeline through the electric push rod, the limiting plate is pushed to enter the valve body, the valve plate enters the limiting groove to be fixed, and the impact strength of the surface of the valve plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, in particular to an explosion-proof and fire-proof damper. Background Art

[0002] The function of explosion-proof fire dampers is to prevent the spread of fire and toxic high-temperature smoke through the air duct during a fire, and to block the flames and shock waves generated by the explosion inside the equipment to prevent them from spreading to upstream pipes and equipment. Because they have both explosion-proof and fire-proof functions, they have a wide range of applications.

[0003] However, explosion-proof and fire-proof dampers usually use gravity and spring mechanisms to close the valves. When the valve plate is subjected to the impact force of the airflow in the pipeline, the valve plate can only be fixed by the spring mechanism in the explosion-proof and fire-proof damper. The locking effect on the valve plate is limited, so that the upper limit of the impact force that the valve plate surface can withstand is relatively low. Utility Model Content

[0004] The utility model aims to provide an explosion-proof fire damper, which can limit the internal valve plate after the explosion-proof fire damper is closed to prevent the valve plate from rotating and improve the impact resistance of the valve plate surface.

[0005] In order to achieve the above-mentioned purpose, an explosion-proof fire damper is provided, comprising a valve body, wherein four support rods are fixedly connected to the middle of the lower end of the valve body, and the four support rods are arranged equidistantly in a circle, the lower ends of the four support rods are fixedly connected to a circular support plate, and the support rods are located at the outer ends of the support plate, the middle of the upper end of the support plate is fixedly connected to a driving motor, and the output end of the driving motor passes through the valve body upward and extends into the valve body, the inner wall of the valve body is rotatably connected to a valve plate, and the output end of the driving motor is fixedly connected to the middle of the valve plate, the lower end of the inner wall of the valve body is fixedly connected to a detection mechanism, and the detection mechanism is located at one end of the valve body, the middle of the outer ends of the valve body are symmetrically installed with limiting mechanisms, and the limiting mechanisms pass through the valve body and extend into the valve body, the upper end of the valve body is fixedly connected to a mounting frame, the lower end of the mounting frame is fixedly connected to a controller, and the lower end of the valve body is fixedly connected to support legs, and the support legs are respectively located at both ends of the valve body. After the explosion-proof fire damper is closed, the internal valve plate can be limited to prevent the valve plate from rotating, and the impact resistance of the valve plate surface can be improved.

[0006] According to the explosion-proof fire damper, the detection mechanism is composed of a smoke sensor and a wind speed sensor, which are used to detect the smoke concentration in the air in the pipeline and the wind speed in the pipeline, and to determine whether a fire or explosion occurs.

[0007] According to the explosion-proof fire damper, the limit mechanism is composed of an electric push rod, a limit plate, and a fixed plate, and the fixed plate is a U-shaped structure, the fixed plate is fixedly connected to the middle of the outer end of the valve body, and the fixed plate openings in the two limit mechanisms face each other, the limit plate is arranged in the fixed plate and is slidably connected to the inner wall of the fixed plate, the limit plate is provided with a limit groove in the middle of one end facing the valve body, and the limit groove is located in the middle of the valve body, the limit plate penetrates the valve body and extends into the valve body, and the valve body is slidably connected to the side wall of the limit groove, the width of the limit groove is the same as the thickness of the valve plate, the electric push rod is provided with two and symmetrically fixedly connected to the side ends of the fixed plate, and the electric push rod is far away from the limit plate, and the output end of the electric push rod penetrates the fixed plate and is fixedly connected to the limit plate. It is used to limit and fix the valve plate after the explosion-proof fire damper is closed.

[0008] According to the explosion-proof fire damper, the middle parts of both ends of the limit plate are respectively fixedly connected with sliding plates, and the sliding plates are far away from the valve body, and the inner wall of the fixed plate and the valve body are fixedly connected with guide rods, and the guide rods respectively penetrate the middle parts of the sliding plates and are slidably connected with the sliding plates, which are used to guide and support the limit plate when it moves, so as to reduce the damage to the valve body caused by the impact force on the limit plate.

[0009] According to the explosion-proof fire damper, the side wall of the limit groove away from the opening end is an arc surface, and the arc surface fits the outer end surface of the valve body, ensuring that the contact surface between the limit plate and the outer surface of the explosion-proof fire damper is completely entered into the explosion-proof fire damper.

[0010] According to the explosion-proof fire damper, the working stroke distance of the electric push rod is the same as the depth of the limit groove, the inner wall of the valve body penetrated by the limit plate is fixedly connected with a sealing ring, and the limit plates on both sides of the limit groove respectively penetrate the middle of the sealing ring and are slidably connected with the sealing ring, so as to reduce the gap between the valve body and the limit plate and improve the overall sealing of the explosion-proof fire damper.

[0011] According to the explosion-proof fire damper, the middle part of the lower end of the valve body is rotatably connected with a rotating plate, and the output end of the driving motor passes through the middle part of the rotating plate and is fixedly connected to the rotating plate, the lower end of the valve body is fixedly connected with a Hall sensor, and the upper end of the rotating plate is a positioning block that cooperates with the Hall sensor. It is used to detect the position of the valve plate, so as to avoid the limit plate from working when the valve plate is not completely closed.

[0012] Compared with the prior art, the beneficial effects of the utility model are: after the valve plate is controlled to be closed by the electric push rod when an explosion or fire occurs in the pipeline, the limit plate is pushed into the valve body, so that the valve plate enters the limit groove to fix the valve plate, thereby improving the impact resistance of the valve plate surface.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 This is a three-dimensional diagram of an explosion-proof fire damper of the utility model;

[0016] Figure 2 This is a bottom view of an explosion-proof and fire-proof damper of the utility model;

[0017] Figure 3 This is a cross-sectional view of a limit mechanism of an explosion-proof and fireproof damper of the utility model;

[0018] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0019] In the figure: 1. mounting frame; 2. valve body; 3. detection mechanism; 4. valve plate; 5. support leg; 6. limit mechanism; 7. controller; 8. rotating plate; 9. driving motor; 10. support plate; 11. electric push rod; 12. limit plate; 13. limit groove; 14. guide rod; 15. sliding plate; 16. fixed plate; 17. support rod; 18. Hall sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides a technical solution: an explosion-proof fire damper, comprising a valve body 2, four support rods 17 are fixedly connected to the middle part of the lower end of the valve body 2, and the four support rods 17 are arranged equidistantly in a circle, the lower ends of the four support rods 17 are fixedly connected to a circular support plate 10, and the support rods 17 are located at the outer end of the support plate 10, a driving motor 9 is fixedly connected to the middle part of the upper end of the support plate 10, and the output end of the driving motor 9 penetrates the valve body 2 upward and extends into the valve body 2, a rotating plate 8 is rotatably connected to the middle part of the lower end of the valve body 2, and the output end of the driving motor 9 penetrates the middle part of the rotating plate 8 and is fixedly connected to the rotating plate 8, a Hall sensor 18 is fixedly connected to the lower end of the valve body 2, and a positioning block that cooperates with the Hall sensor 18 at the upper end of the rotating plate 8 is used to detect the position of the valve plate 4, thereby preventing the limit plate 12 from working when the valve plate 4 is not fully closed. The inner wall of the valve body 2 is rotatably connected to a valve plate 4, and the output end of the drive motor 9 is fixedly connected to the middle of the valve plate 4. The lower end of the inner wall of the valve body 2 is fixedly connected to a detection mechanism 3, and the detection mechanism 3 is located at one end of the valve body 2. The detection mechanism 3 is composed of a smoke sensor and a wind speed sensor, which are used to detect the smoke concentration in the air in the pipeline and the wind speed in the pipeline, so as to determine whether a fire or explosion occurs. The limiting mechanism 6 is symmetrically installed at the middle of the two ends of the outer side of the valve body 2, and the limiting mechanism 6 penetrates the valve body 2 and extends into the valve body 2. The limiting mechanism 6 is composed of an electric push rod 11, a limiting plate 12, and a fixed plate 16, and the fixed plate 16 is a U-shaped structure. The fixed plate 16 is fixedly connected to the middle of the outer end of the valve body 2, and the openings of the fixed plates 16 in the two limiting mechanisms 6 face each other. The limiting plate 12 is arranged in the fixed plate 16 and is slidably connected to the inner wall of the fixed plate 16. The middle of the two ends of the limiting plate 12 is respectively fixedly connected with a sliding plate 15, and the sliding plate 15 is away from the valve body 2. A guide rod 14 is fixedly connected between the inner wall of the fixed plate 16 and the valve body 2, and the guide rod 14 penetrates the middle of the sliding plate 15 and is slidably connected to the sliding plate 15. It is used to guide and support the limiting plate 12 when it moves, so as to reduce the damage to the valve body 2 caused by the limiting plate 12 when it is subjected to impact force. A limiting groove 13 is provided in the middle of one end of the limiting plate 12 facing the valve body 2, and the limiting groove 13 is located in the middle of the valve body 2. The limiting plate 12 penetrates the valve body 2 and extends into the valve body 2, and the valve body 2 is slidably connected to the side wall of the limiting groove 13. The width of the limiting groove 13 is the same as the thickness of the valve plate 4. The side wall of the limiting groove 13 away from the open end is an arc surface, and the arc surface fits the outer end surface of the valve body 2 to ensure that the contact surface between the limiting plate 12 and the outer surface of the explosion-proof fire damper is ensured after the limiting plate 12 completely enters the explosion-proof fire damper. The electric push rod 11 is provided with two side ends that are symmetrically fixedly connected to the fixed plate 16, and the electric push rod 11 is away from the limiting plate 12. The output end of the electric push rod 11 penetrates the fixed plate 16 and is fixedly connected to the limiting plate 12, which is used to limit and fix the valve plate 4 after the explosion-proof fire damper is closed.The working stroke distance of the electric push rod 11 is the same as the depth of the limit groove 13. The inner wall of the valve body 2 penetrated by the limit plate 12 is fixedly connected with a sealing ring, and the limit plates 12 on both sides of the limit groove 13 respectively penetrate the middle of the sealing ring and are slidably connected with the sealing ring, which is used to reduce the gap between the valve body 2 and the limit plate 12, and improve the overall sealing of the explosion-proof fire damper. The upper end of the valve body 2 is fixedly connected with the mounting frame 1, the lower end of the mounting frame 1 is fixedly connected with the controller 7, and the lower end of the valve body 2 is fixedly connected with the support legs 5, and the support legs 5 are respectively located at both ends of the valve body 2.

[0022] Working principle: When the detection mechanism 3 detects that the smoke content or wind speed of the air in the pipeline increases abnormally, the driving motor 9 drives the valve plate 4 to rotate to close the inside of the valve body 2. At the same time, the rotating plate 8 rotates following the output end of the driving motor 9. The Hall sensor 18 detects the rotating plate 8 to confirm whether the valve plate 4 is completely closed. After the valve plate 4 is completely closed, the electric push rod 11 is used to push the limit plate 12 into the valve body 2, and the valve body 2 enters the limit groove 13 of the limit plate 12. The limit groove 13 in the limit plate 12 is used to fix the valve plate 4.

[0023] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An explosion-proof fire damper, comprising a valve body (2), characterized in that: Four support rods (17) are fixedly connected to the middle of the lower end of the valve body (2), and the four support rods (17) are arranged equidistantly in a circle. The lower ends of the four support rods (17) are fixedly connected to a circular support plate (10), and the support rods (17) are located at the outer ends of the support plate (10). A drive motor (9) is fixedly connected to the middle of the upper end of the support plate (10), and the output end of the drive motor (9) passes through the valve body (2) upward and extends into the valve body (2). The inner wall of the valve body (2) is rotatably connected to a valve plate (4), and the output end of the drive motor (9) is connected to the valve plate (4). The valve body (2) is fixedly connected in the middle, the lower end of the inner wall of the valve body (2) is fixedly connected with a detection mechanism (3), and the detection mechanism (3) is located at one end of the valve body (2), and the limiting mechanisms (6) are symmetrically installed in the middle of the two ends of the outer side of the valve body (2), and the limiting mechanisms (6) penetrate the valve body (2) and extend into the valve body (2), the upper end of the valve body (2) is fixedly connected with a mounting frame (1), and the lower end of the mounting frame (1) is fixedly connected with a controller (7), and the lower end of the valve body (2) is fixedly connected with a support leg (5), and the support leg (5) is respectively located at the two ends of the valve body (2).

2. An explosion-proof fire damper according to claim 1, characterized in that: The detection mechanism (3) consists of a smoke sensor and a wind speed sensor.

3. The explosion-proof fire damper according to claim 1, characterized in that: The limiting mechanism (6) is composed of an electric push rod (11), a limiting plate (12), and a fixed plate (16), and the fixed plate (16) is a U-shaped structure. The fixed plate (16) is fixedly connected to the middle part of the outer end of the valve body (2), and the openings of the fixed plates (16) in the two limiting mechanisms (6) face each other. The limiting plate (12) is arranged in the fixed plate (16) and is slidably connected to the inner wall of the fixed plate (16). The limiting plate (12) is provided with a limiting groove (13) in the middle part of one end facing the valve body (2), and the limiting groove (13) is 3) is located in the middle of the valve body (2), the limit plate (12) passes through the valve body (2) and extends into the valve body (2), and the valve body (2) is slidably connected to the side wall of the limit groove (13), the width of the limit groove (13) is the same as the thickness of the valve plate (4), the electric push rod (11) is provided with two side ends which are symmetrically fixedly connected to the fixed plate (16), and the electric push rod (11) is away from the limit plate (12), and the output end of the electric push rod (11) passes through the fixed plate (16) and is fixedly connected to the limit plate (12).

4. An explosion-proof fire damper as claimed in claim 3, characterized in that: The middle parts of both ends of the limit plate (12) are respectively fixedly connected with sliding plates (15), and the sliding plates (15) are far away from the valve body (2). A guide rod (14) is fixedly connected between the inner wall of the fixed plate (16) and the valve body (2), and the guide rod (14) respectively passes through the middle part of the sliding plate (15) and is slidably connected with the sliding plate (15).

5. The explosion-proof fire damper according to claim 3, characterized in that: The side wall of the limiting groove (13) away from the opening end is an arc surface, and the arc surface is in contact with the outer end surface of the valve body (2).

6. An explosion-proof fire damper as claimed in claim 3, characterized in that: The working stroke distance of the electric push rod (11) is the same as the depth of the limit groove (13); the inner wall of the valve body (2) penetrated by the limit plate (12) is fixedly connected with a sealing ring, and the limit plates (12) on both sides of the limit groove (13) respectively penetrate the middle of the sealing ring and are slidably connected to the sealing ring.

7. The explosion-proof fire damper according to claim 1, characterized in that: The middle part of the lower end of the valve body (2) is rotatably connected to a rotating plate (8), and the output end of the drive motor (9) passes through the middle part of the rotating plate (8) and is fixedly connected to the rotating plate (8). The lower end of the valve body (2) is fixedly connected to a Hall sensor (18), and the upper end of the rotating plate (8) is a positioning block that cooperates with the Hall sensor (18).

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