Hidden fireproof door closer

Abstract

The utility model discloses a hidden type fireproof door closer, and relates to the technical field of door closers. The quick door closing device comprises a pre-buried shell, a locking assembly and a quick door closing assembly, a door closing mechanism is fixedly connected to the bottom between the two sides of an inner cavity of the pre-buried shell, the locking assembly comprises an air chamber, and the rear side of the air chamber is fixedly connected with the pre-buried shell. By means of the locking assembly, an air chamber internal pressure adjusting mechanism is triggered through the temperature sensor in a high-temperature environment, when the door frame sealing strip is softened due to a fire disaster, the electric push rod drives the rubber plug to move in the pressure shell, air in the pressure shell is conveyed into the air chamber, and the interior of the air chamber is continuously pressurized; after air pressure in the air chamber is increased, the piston plate is pushed to drive the pressing block to downwards press the slope block, vertical pressure is converted into horizontal displacement of the sliding sleeve through the wedge-shaped structure, in the process, the push wheel generates transverse expansion force, the door leaf and the door frame are forced to form rigid press fit, and a metal contact type sealing interface is constructed when the sealing strip fails.

Description

A concealed fireproof door closer Technical Field

[0001] This utility model belongs to the field of door closer technology, and in particular relates to a concealed fireproof door closer. Background Technology

[0002] A door closer is a hydraulic device installed on a door to automatically close it after it has been opened. It generates energy through the flow and compression of internal fluid to achieve automatic door closing. Door closers have a buffer function and can control the speed and force of closing the door to prevent damage to the door due to impact. They are widely used on doors that need to close automatically, such as fire doors and security doors, to improve safety and energy efficiency.

[0003] However, traditional fire door closers are usually exposed, which not only affects the aesthetics of the building, but also has a relatively simple structure and function, which cannot meet the high requirements of modern buildings for fire door closers. For example, when the fire is severe, the sealing strips on the edge of the fire door are melted by the high temperature, causing the fire door to not close tightly and gaps to appear. Smoke from the fire can escape from the edge of the fire door, affecting the isolation effect of the fire door and making it unsuitable for use.

[0004] To address these issues, we provide a concealed fireproof door closer. Summary of the Invention

[0005] The purpose of this utility model is to provide a concealed fireproof door closer. By combining the locking component and the quick-closing component, it solves the problem that the existing door closers do not have fireproof and smokeproof functions. In the event of a fire, high temperatures can easily cause the sealing strip to melt, resulting in the fire door not closing properly and smoke easily escaping from the edge of the fire door.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a concealed fireproof door closer, comprising a pre-embedded shell, a locking assembly, and a quick-closing assembly. A closing mechanism is fixedly connected to the bottom between the two sides of the inner cavity of the pre-embedded shell. The locking assembly includes an air chamber, the rear side of which is fixedly connected to the pre-embedded shell. A piston plate is provided within the inner cavity of the air chamber, and pressure blocks are fixedly connected to both sides of the bottom of the piston plate. An inclined block is provided at the bottom of each pressure block, and the bottom of the inclined block is fixedly connected to the closing mechanism. A pressurizing mechanism is connected to both sides of the air chamber. The quick-closing assembly includes two fixed shells, each with its opposite side fixedly connected to an inclined block. A pressure tank is provided within the inner cavity of each fixed shell, and nozzles are connected to opposite sides of the two pressure tanks. A solenoid valve is installed on the surface of each nozzle.

[0008] The present invention is further configured such that the door closing mechanism includes a sliding rod, both sides of which are fixedly connected to the inner wall of the pre-embedded shell. A spring and a sliding sleeve are sleeved on the surface of the sliding rod. A push wheel is fixedly connected to the front side of the sliding sleeve. The front side of the push wheel extends to the outer side of the pre-embedded shell. The top of the sliding sleeve is fixedly connected to the inclined block. The sliding rod and the sliding sleeve can facilitate the left and right movement of the push wheel. The spring can be compressed after being pressed and push the sliding sleeve to move after it is no longer squeezed.

[0009] The present invention is further configured such that the pressurizing mechanism includes two pressure shells, and one side of each pressure shell is connected to an air chamber via a conduit. Electric actuators are fixedly connected to both sides of the inner cavity of the pre-embedded shell, and rubber plugs are fixedly connected to the output ends of the two electric actuators on opposite sides. The electric actuators can control the movement of the rubber plugs. When the rubber plugs move inside the pressure shells, they can transport all the air inside to the air chamber, thereby increasing the air pressure inside the air chamber and controlling the piston plate to move downward.

[0010] The present invention is further configured such that mounting holes are provided on both sides of the rear side of the inner cavity of the pre-embedded shell, and a controller is fixedly connected to the left side of the rear side of the inner cavity of the pre-embedded shell. The mounting holes facilitate the installation and fixing of the pre-embedded shell, and the controller can control the opening and closing of the solenoid valve, the electric push rod and the valve.

[0011] The present invention is further configured such that a temperature sensor is fixedly connected to the top of the air chamber and a rubber sheet is fixedly connected to the top of the piston plate. The temperature sensor can detect the external temperature and enable the controller to start the solenoid valve and electric push rod when an abnormally high temperature occurs.

[0012] The present invention is further configured such that positioning rods are fixedly connected to both sides of the front side of the pre-embedded shell, positioning sleeves are slidably connected to the surface of the positioning rods, and a baffle plate is fixedly connected to the bottom of the positioning sleeves. A sealing notch is provided at the bottom of the baffle plate. The positioning rods and positioning sleeves can limit the baffle plate, so that it can move up and down smoothly. The baffle plate can seal and block the opening on the front side of the pre-embedded shell.

[0013] The present invention is further configured such that a connecting ring is fixedly connected to the surface of the pressure shell, the rear side of the connecting ring is fixedly connected to the inner wall of the pre-embedded shell, and a valve is installed on the surface of the conduit. The connecting ring can increase the stability of the connection between the pressure shell and the pre-embedded shell, and the valve can control the opening and closing of the conduit.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model uses a locking assembly to trigger a pressure regulation mechanism inside the air chamber via a temperature sensor in a high-temperature environment. When a fire causes the door frame sealing strip to soften, the electric push rod drives the rubber plug to move inside the pressure shell, delivering the air inside to the air chamber, causing continuous pressurization inside the air chamber. After the air pressure inside the air chamber increases, it pushes the piston plate to drive the pressure block to press down the inclined block. The wedge structure converts the vertical pressure into the horizontal displacement of the sliding sleeve. This process causes the push wheel to generate a lateral expansion force, forcing the door leaf and the door frame to form a rigid seal. When the sealing strip fails, a metal contact sealing interface is constructed, effectively making up for the defects of traditional door closers that rely on elastic sealing materials, and achieving zero-gap locking under high-temperature conditions.

[0016] 2. This utility model uses a quick-closing assembly that employs a combined compressed air and mechanical spring drive mode to enhance door closing efficiency. When the temperature sensor detects a high temperature, the controller receives a fire alarm signal, and the solenoid valve immediately opens the pressure tank to release high-pressure gas. The directional airflow generated by the nozzle impacts the sliding sleeve, causing it to slide rapidly on the sliding rod surface. This, combined with the release of the spring's stored energy, creates a superimposed force, enabling the sliding sleeve and push wheel to move quickly to complete the closing operation of the fire door, thus improving the fireproof effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0018] Figure 1 is a perspective view of a concealed fireproof door closer;

[0019] Figure 2 is a cross-sectional view of the embedded shell in a concealed fireproof door closer;

[0020] Figure 3 is a cross-sectional view of the air chamber in a concealed fireproof door closer;

[0021] Figure 4 is a cross-sectional view of the pressure shell in a concealed fireproof door closer;

[0022] Figure 5 is an exploded view of the quick-closing component in a concealed fireproof door closer.

[0023] In the attached diagram: 1. Embedded shell; 2. Door closing mechanism; 3. Locking assembly; 31. Air chamber; 32. Piston plate; 33. Pressure block; 34. Inclined block; 35. Pressurizing mechanism; 4. Quick door closing assembly; 41. Fixed shell; 42. Pressure tank; 43. Nozzle; 44. Solenoid valve; 21. Slide rod; 22. Spring; 23. Sliding sleeve; 24. Push wheel; 351. Pressure shell; 352. Electric push rod; 353. Rubber stopper; 5. Temperature sensor; 6. Positioning rod; 7. Positioning sleeve; 8. Baffle plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example 1

[0026] Please refer to Figures 1-5. This utility model is a concealed fireproof door closer, including a pre-embedded shell 1, a locking assembly 3, and a quick-closing assembly 4. A closing mechanism 2 is fixedly connected to the bottom between the two sides of the inner cavity of the pre-embedded shell 1. The locking assembly 3 includes an air chamber 31, the rear side of which is fixedly connected to the pre-embedded shell 1. A piston plate 32 is provided in the inner cavity of the air chamber 31. Pressure blocks 33 are fixedly connected to both sides of the bottom of the piston plate 32. An inclined block 34 is provided at the bottom of the pressure block 33. The bottom of the inclined block 34 is fixedly connected to the closing mechanism 2. A pressurizing mechanism 35 is connected to both sides of the air chamber 31. The quick-closing assembly 4 includes two fixed shells 41. The opposite side of the two fixed shells 41 is fixedly connected to the inclined block 34. A pressure tank 42 is provided in the inner cavity of the fixed shell 41. A nozzle 43 is connected to the opposite side of the two pressure tanks 42. A solenoid valve 44 is installed on the surface of the nozzle 43.

[0027] Specifically: the closing mechanism 2 can close the fire door after it is opened; the piston plate 32 can control the pressure block 33 to move downward under the pressure of the air chamber 31; the inclined block 34 can cooperate with the pressure block 33 to control the position of the two sliding sleeves 23 and the push wheel 24; the pressurizing mechanism 35 is used to pressurize the air chamber 31 to control the piston plate 32 to move; the fixed shell 41 is used to install and fix the pressure tank 42; the pressure tank 42 can store compressed air; the nozzle 43 can discharge the compressed air to accelerate the sliding speed of the sliding sleeve 23 on the surface of the sliding rod 21, so as to quickly complete the closing operation of the fire door; and the solenoid valve 44 can control the opening and closing of the nozzle 43.

[0028] Example 2

[0029] Please refer to Figures 1-5. Based on Embodiment 1, the door closing mechanism 2 includes a sliding rod 21. Both sides of the sliding rod 21 are fixedly connected to the inner wall of the pre-embedded shell 1. A spring 22 and a sliding sleeve 23 are sleeved on the surface of the sliding rod 21. A push wheel 24 is fixedly connected to the front side of the sliding sleeve 23. The front side of the push wheel 24 extends to the outer side of the pre-embedded shell 1. The top of the sliding sleeve 23 is fixedly connected to the inclined block 34. The pressurizing mechanism 35 includes two pressure shells 351. The opposite sides of the two pressure shells 351 are connected to the air chamber 31 through a conduit. Electric push rods 352 are fixedly connected to both sides of the inner cavity of the pre-embedded shell 1. The output ends of the opposite sides of the two electric push rods 352 are... All are fixedly connected with rubber plugs 353. Mounting holes are opened on both sides of the rear side of the inner cavity of the pre-embedded shell 1. A controller is fixedly connected to the left side of the rear side of the inner cavity of the pre-embedded shell 1. A temperature sensor 5 is fixedly connected to the top of the air chamber 31. A rubber sheet is fixedly connected to the top of the piston plate 32. Positioning rods 6 are fixedly connected to both sides of the front side of the pre-embedded shell 1. A positioning sleeve 7 is slidably connected to the surface of the positioning rod 6. A baffle plate 8 is fixedly connected to the bottom of the positioning sleeve 7. A sealing notch is opened at the bottom of the baffle plate 8. A connecting ring is fixedly connected to the surface of the pressure shell 351. The rear side of the connecting ring is fixedly connected to the inner wall of the pre-embedded shell 1. A valve is installed on the surface of the conduit.

[0030] Specifically: the slide rod 21 and the slide sleeve 23 facilitate the left and right movement of the push wheel 24; the spring 22 can be compressed after being pressed and push the slide sleeve 23 to move after it is no longer squeezed; the electric push rod 352 can control the movement of the rubber plug 353; when the rubber plug 353 moves inside the pressure shell 351, it can transport all the air inside to the air chamber 31, increasing the air pressure inside the air chamber 31 and controlling the piston plate 32 to move downward; the mounting hole facilitates the installation and fixing of the pre-embedded shell 1; the controller can control the opening and closing of the solenoid valve 44, the electric push rod 352 and the valve; the temperature sensor 5 can detect the external temperature, and when an abnormally high temperature occurs, the controller can control the solenoid valve 44 and the electric push rod 352 to start; the positioning rod 6 and the positioning sleeve 7 can limit the position of the baffle plate 8, allowing it to move up and down smoothly; the baffle plate 8 can seal and block the opening on the front side of the pre-embedded shell 1; the connecting ring can increase the stability of the connection between the pressure shell 351 and the pre-embedded shell 1; and the valve can control the opening and closing of the conduit.

[0031] The working principle of this utility model is as follows: When the temperature sensor 5 detects an abnormally high temperature after the fire door is opened, the solenoid valve 44 opens. After the solenoid valve 44 opens, the high-pressure gas in the pressure tank 42 is ejected at high speed through the nozzle 43. The directional airflow impact causes the sliding sleeve 23 to slide rapidly on the surface of the sliding rod 21. With the elastic restoring action of the spring 22, the sliding sleeve 23 and the push wheel 24 move rapidly, forcing the fire door to close quickly and preventing the fire from spreading. Subsequently, the controller synchronously starts the electric push rod 352, which drives the rubber plug 353 to move directionally within the pressure shell 351. Air is injected into the air chamber 31 through a conduit, causing the internal air pressure of the air chamber 31 to rise. The pressurized air chamber 31 pushes the piston plate 32 to move downward, causing the pressure block 33 to apply vertical pressure to the inclined block 34. The wedge-shaped structure of the inclined block 34 converts the vertical force into horizontal displacement, forcing the sliding sleeve 23 to slide laterally along the sliding rod 21. The push wheel 24 then expands outward, making the door leaf and the door frame form a rigid seal. When the sealing strip fails, a metal contact sealing interface is constructed, which effectively makes up for the defects of traditional door closers that rely on elastic sealing materials and achieves zero-gap locking under high temperature conditions.

[0032] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific implementation methods described. The present specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can better understand and utilize the present utility model.

Claims

1. A concealed fireproof door closer, comprising a pre-embedded shell (1), a locking assembly (3), and a quick-closing assembly (4), characterized in that: A door closing mechanism (2) is fixedly connected to the bottom between the two sides of the inner cavity of the pre-embedded shell (1); the locking assembly (3) includes an air chamber (31), the rear side of the air chamber (31) is fixedly connected to the pre-embedded shell (1), a piston plate (32) is provided in the inner cavity of the air chamber (31), and pressure blocks (33) are fixedly connected to both sides of the bottom of the piston plate (32). An inclined block (34) is provided at the bottom of the pressure block (33), and the bottom of the inclined block (34) is connected to the door closing mechanism (2). The door mechanism (2) is fixedly connected, and the air chamber (31) is connected to a pressurizing mechanism (35) on both sides; the quick-closing assembly (4) includes two fixed shells (41), and the opposite side of the two fixed shells (41) is fixedly connected to the inclined block (34). The inner cavity of the fixed shell (41) is provided with a pressure tank (42), and the opposite side of the two pressure tanks (42) is connected to a nozzle (43). The surface of the nozzle (43) is equipped with a solenoid valve (44).

2. The concealed fireproof door closer according to claim 1, characterized in that: The closing mechanism (2) includes a sliding rod (21), both sides of which are fixedly connected to the inner wall of the pre-embedded shell (1). A spring (22) and a sliding sleeve (23) are sleeved on the surface of the sliding rod (21). A push wheel (24) is fixedly connected to the front side of the sliding sleeve (23). The front side of the push wheel (24) extends to the outer side of the pre-embedded shell (1). The top of the sliding sleeve (23) is fixedly connected to the inclined block (34).

3. The concealed fireproof door closer according to claim 1, characterized in that: The pressurizing mechanism (35) includes two pressure shells (351). The opposite sides of the two pressure shells (351) are connected to the air chamber (31) through a conduit. Electric push rods (352) are fixedly connected to both sides of the inner cavity of the pre-embedded shell (1). Rubber plugs (353) are fixedly connected to the output ends of the opposite sides of the two electric push rods (352).

4. A concealed fireproof door closer according to claim 1, characterized in that: The pre-embedded shell (1) has mounting holes on both sides of the rear side of the inner cavity, and a controller is fixedly connected to the left side of the rear side of the inner cavity of the pre-embedded shell (1).

5. A concealed fireproof door closer according to claim 1, characterized in that: A temperature sensor (5) is fixedly connected to the top of the air chamber (31), and a rubber sheet is fixedly connected to the top of the piston plate (32).

6. A concealed fireproof door closer according to claim 1, characterized in that: Positioning rods (6) are fixedly connected to both sides of the front side of the pre-embedded shell (1). Positioning sleeves (7) are slidably connected to the surface of the positioning rods (6). A baffle plate (8) is fixedly connected to the bottom of the positioning sleeve (7). A sealing notch is opened at the bottom of the baffle plate (8).

7. A concealed fireproof door closer according to claim 3, characterized in that: A connecting ring is fixedly connected to the surface of the pressure shell (351), and the rear side of the connecting ring is fixedly connected to the inner wall of the pre-embedded shell (1). A valve is installed on the surface of the conduit.

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