Fireproof door convenient to keep open and capable of being automatically closed

Abstract

The invention discloses a fireproof door convenient to keep open and capable of being automatically closed. The fireproof door comprises a fireproof door body, a door opening keeping mechanism and an automatic door closing mechanism. The door opening keeping mechanism is detachably arranged on the fireproof door main body; the automatic door closing mechanism is fixedly mounted on the fireproof door main body; the product of the door closing acting force F2 applied to the door by the automatic door closing mechanism and the distance L2 of the straight line where the rotating shaft core of the fireproof door body is located is M2, the product of the door opening acting force F1 applied to the door by the door opening keeping mechanism and the distance L1 of the straight line where the rotating shaft core of the fireproof door body is located is M1, and when M2 is larger than M1, the fireproof door body is pushed to be automatically closed; when M2 is smaller than or equal to M1, the fireproof door body is kept in an open state; when high temperature is generated in a fire disaster, the door opening maintaining mechanism is damaged, the door opening acting force F1 disappears, and the automatic door closing mechanism pushes the fireproof door body to be automatically closed. The fireproof door can be kept normally closed, can be kept in an open state when needed, and can be automatically closed when a fire disaster occurs.

Description

Technical Field

[0001] The present invention relates to the technical field of fireproof doors, and in particular to a fireproof door which is convenient to keep open and can be closed automatically. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are fireproof partitions with certain fire resistance, located between fire compartments, evacuation stairwells, vertical shafts, etc. They are specially used to isolate fire sources in housing buildings and play a huge role in firefighting work. Once a fire occurs, people can get a chance to escape through fire doors.

[0003] Common fire doors are normally closed fire doors. This type of fire door is required to be opened only when necessary and remain automatically closed when there is no external force. However, in order to facilitate entry and exit, such as carrying large items, the normally closed fire door needs to be opened at certain times. Since the existing normally closed fire doors are equipped with automatic door closers and cannot remain open, export users will use obstacles to support the normally closed fire doors, and often forget to remove the obstacles and close the normally closed fire doors after use, resulting in the normally closed fire doors often being open and losing their fire protection function. It is also difficult to rely on external video surveillance devices to conduct timely and effective control. Once a fire occurs, the consequences are disastrous.

[0004] The Korean invention patent with the patent publication number KR20220169136A discloses a device for keeping the fire door open; the invention is provided with an electromagnet locking mechanism to keep the fire door open, and the invention is such that children cannot easily affect its operation. When the fire door needs to be closed, the locking mechanism is disengaged by controlling the action of the electromagnet, so that the fire door can be closed using the door closer. However, the electromagnet in the invention needs to be powered by electricity, because a fire usually causes a power outage or the power needs to be cut off immediately; when powered by a battery, it also needs to be connected to the mains for charging, and the battery will be easily damaged or fail if it is idle for a long time, and it is impossible to automatically close the fire door in a powerless state, so this structure still has some hidden dangers.

[0005] Therefore, designing a fire door that can be kept normally closed and can also be kept normally open when needed, and can close automatically when a fire occurs without power or external power, can better meet people's usage requirements. Summary of the invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a fire door which is easy to keep open and can be automatically closed. The fire door can be kept normally closed and can also be kept normally open when necessary. When a fire occurs, the fire door can still automatically close without power supply or external power and send out an alarm signal.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A fire door that is easy to keep open and can be closed automatically, comprising a fire door body, a door opening holding mechanism and an automatic door closing mechanism; the door opening holding mechanism is detachably arranged on the fire door body; the automatic door closing mechanism is fixedly installed on the fire door body; The product of the door closing force F2 applied by the automatic door closing mechanism on the door and the distance L2 from the straight line where the rotation axis of the fire door body is located is M2, and the product of the door opening force F1 applied by the door opening holding mechanism on the door and the distance L1 from the straight line where the rotation axis of the fire door body is located is M1. When M2 is greater than M1, the fire door body is pushed to close automatically; when M2 is less than or equal to M1, the fire door body remains in an open state; when a fire generates high temperature, the door opening holding mechanism is destroyed to make its door opening force F1 disappear, and the automatic door closing mechanism pushes the fire door body to close automatically.

[0008] Furthermore, the door opening holding mechanism includes a pull rope fixing seat, a movable traction component, and a traction rope; the pull rope fixing seat is fixedly installed on the wall; the movable traction component is fixedly installed on the side of the fire door body close to the wall; the traction rope is made of fusible material; the movable traction component includes a traction base, a sliding guide rail assembly and a traction spring; the traction base is provided with a mounting groove, the sliding guide rail assembly is arranged in the mounting groove, and the sliding guide rail assembly is provided with a slider capable of reciprocating sliding, one end of the traction spring is fixed to one end of the mounting groove, and the other end of the traction spring is fixed to the slider; the slider is then connected to one end of the traction rope; the other end of the traction rope is fixed to the pull rope fixing seat.

[0009] Furthermore, during the process of the fire door body rotating from the open state to the closed state, the slider slides in the installation groove under the joint action of the traction rope and the traction spring.

[0010] Furthermore, the door opening holding mechanism also includes a key power generation device and an alarm device; the key power generation device and the alarm device are electrically connected; when a fire generates high temperature, the traction rope is melted, and after the traction rope is melted, the traction spring drives the slider to hit the key power generation device to generate electricity, thereby controlling the alarm device to send an alarm signal.

[0011] Furthermore, the fire door body includes a door panel, a door handle, a door frame and a hinge; the door handle is installed on the door panel; the door panel and the door frame are fixedly connected by the hinge; the automatic door closing mechanism is installed on the upper part of the door frame and connected to the upper side of the door panel.

[0012] Furthermore, the automatic door closing mechanism is an automatic door closer.

[0013] Furthermore, the key power generation device adopts purchased standard parts, which includes a power generation key, a power generation coil and a magnetic field formed by a permanent magnet.

[0014] Furthermore, the traction base is detachably fixed on the door panel by screws.

[0015] Furthermore, a fusible hook is provided in the pull rope fixing seat or the slider, and the two ends of the traction rope are respectively fixed to the pull rope fixing seat and the slider through the fusible hook.

[0016] The present invention has the following beneficial effects: 1. The fire door of the present invention can be kept normally closed, and when needed, it can be kept normally open when the door is opened to a certain angle without using any obstacles to support the door, which is convenient for people to enter and exit and carry items; and it can automatically close the door when a fire occurs. Automatic closing does not require additional power or energy, and can effectively prevent the spread of fire and ensure fire safety.

[0017] 2. The present invention is provided with a key power generation device and an automatic alarm system, which can utilize the spring energy stored in the door opening holding mechanism to impact the key power generation device to generate electricity, and send an alarm signal immediately when a fire occurs; sending the alarm signal does not require the use of batteries or external power supplies.

[0018] 3. The door opening holding mechanism of the present invention is easy to dismantle and install, and is suitable for modification on existing fire doors, and is also suitable for matching installation on new fire doors, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of the open state of the fire door that can be kept open and automatically closed according to the present invention; Figure 2 A schematic top view of the fire door of the present invention which is convenient for keeping open and automatically closing in an open state; Figure 3 It is a schematic diagram of the three-dimensional structure of the fire door body of the present invention; Figure 4 It is a three-dimensional schematic diagram of the door opening holding mechanism of the present invention; Figure 5 for Figure 4 The enlarged schematic diagram of point A in the middle; Figure 6 This is a schematic diagram of the force analysis when the fire door of the present invention is kept in an open state.

[0020] Description of reference numerals: 1. Fire door body; 11. Door panel; 12. Door handle; 13. Door frame; 14. Hinge; 2. Door opening retention mechanism; 21. Pull rope fixing seat; 22. Movable traction component; 221. Traction base; 222. Sliding guide rail assembly; 2221. Sliding block; 223. Traction spring; 224. Mounting groove; 23. Traction rope; 24. Alarm device; 25. Key power generation device; 3. Automatic door closing mechanism. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figure 1-6 As shown: a fire door which is easy to keep open and can be automatically closed, comprises a fire door body 1, a door opening holding mechanism 2 and an automatic door closing mechanism 3; the automatic door closing mechanism 3 is a conventional automatic door closer; the door opening holding mechanism 2 is detachably arranged on the fire door body 1; the automatic door closing mechanism 3 is fixedly installed on the fire door body 1; the product of the door closing force F2 applied by the automatic door closing mechanism 3 on the door and the distance L2 of the straight line where the rotating axis core of the fire door body 1 is located is M2, and the product of the door opening force F1 applied by the door opening holding mechanism 2 on the door and the distance L1 of the straight line where the rotating axis core of the fire door body 1 is located is M1, when M2 is greater than M1, the fire door body 1 is pushed to close automatically; when M2 is less than or equal to M1, the fire door body 1 is kept in an open state; when a fire generates high temperature, the door opening holding mechanism 2 is destroyed to make its door opening force F1 disappear, and the automatic door closing mechanism 3 pushes the fire door body 1 to close automatically.

[0022] The door opening holding mechanism 2 includes a pull rope fixing seat 21, a movable traction component 22, and a traction rope 23; the pull rope fixing seat 21 is fixedly installed on the wall; the movable traction component 22 is fixedly installed on the side of the fire door body 1 close to the wall; the traction rope 23 is made of fusible material and has a certain elasticity; the movable traction component 22 includes a traction base 221, a sliding guide rail assembly 222 and a traction spring 223; a mounting groove 224 is provided in the traction base 221, the sliding guide rail assembly 222 is arranged in the mounting groove 224, a slider 2221 capable of reciprocating sliding is provided in the sliding guide rail assembly 222, one end of the traction spring 223 is fixed to one end of the mounting groove 224, and the other end of the traction spring 223 is fixed to the slider 2221; the slider 2221 is connected to one end of the traction rope 23; the other end of the traction rope 23 is fixed to the pull rope fixing seat 21. Alternatively, a fusible hook is provided in the pull rope fixing seat 21 or the slider 2221, and both ends of the traction rope 23 are fixed to the pull rope fixing seat 21 and the slider 2221 respectively through the fusible hook. The traction base 221 is detachably fixed to the door panel 11 by screws, and the traction base 221 and the traction rope 23 can be arranged on the upper side of the door panel 11 to avoid accidental damage.

[0023] In the specific embodiment, the length of the traction rope 23, the specification of the traction spring 223, the installation position of the traction base 221, etc. are designed and selected according to the structure of the fire door body 1 and the specifications and models of the automatic door closing mechanism 3. When the fire door body 1 rotates from the open state to the closed state, the slider 2221 slides in the installation groove 224 under the joint action of the traction rope 23 and the traction spring 223, and the angle between the traction rope 23 and the fire door body 1 changes from large to small.

[0024] The door opening holding mechanism 2 also includes a key power generation device 25 and an alarm device 24; the key power generation device 25 and the alarm device 24 are electrically connected; the key power generation device 25 uses an externally purchased standard component, which includes a power generation key, a power generation coil and a magnetic field formed by a permanent magnet. When a fire generates high temperature, the traction rope 23 is melted, and after the traction rope 23 is melted, the traction spring 223 drives the slider 2221 to hit the power generation key in the key power generation device 25 to generate electricity, and the generated electric energy is used to control the alarm device 24 to send an alarm signal, which has a better protection effect.

[0025] The fire door body 1 includes a door panel 11, a door handle 12, a door frame 13 and a hinge 14; the door handle 12 is installed on the door panel 11; the door panel 11 and the door frame 13 are fixedly connected by the hinge 14; the automatic door closing mechanism 3 is installed on the upper part of the door frame 13 and is connected to the upper side of the door panel 11.

[0026] The working principle of the present invention is: During normal use, the product M2 of the door closing force F2 applied on the door by the automatic door closing mechanism 3 and the distance L2 from the straight line where the rotating axis of the fire door body 1 is located is greater than the product M1 of the door opening force F1 applied on the door by the door opening holding mechanism 2 and the distance L1 from the straight line where the rotating axis of the fire door body 1 is located (when closing the door, the angle between the traction rope 23 and the door panel 11 becomes smaller, the traction spring 223 is stretched, and the tension torque applied by the traction rope 23 on the door is small), and the fire door body 1 remains closed.

[0027] When the fire door needs to be temporarily opened, the door panel 11 is rotated, the traction spring 223 contracts, the angle between the traction rope 23 and the door panel 11 gradually increases, the pulling torque applied by the traction rope 23 to the door panel 11 becomes longer, and the pulling torque of the door closer 15 to the door panel 11 becomes smaller. When the door panel 11 is opened to 90 degrees or more, the traction rope 23 can pull the door panel 11 very effortlessly to keep it open. When the door needs to be closed again, the door panel 11 is rotated to make its opening angle less than 90 degrees, and the automatic door closing mechanism 3 can automatically close the door again.

[0028] When a fire occurs, if the door is open, since the traction rope 23 is made of fusible material, the high temperature generated by the fire can melt the traction rope 23 or the hooks at both ends of the traction rope 23, and the pulling force of the traction rope 23 on the door panel 11 disappears. Under the action of the automatic door closing mechanism 3, the fire door can be closed again, achieving the purpose of automatic door closing to block flames and smoke in the absence of electricity and external force.

[0029] The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fire door that is easy to keep open and can be closed automatically, comprising a fire door body (1), a door opening holding mechanism (2) and an automatic door closing mechanism (3); the door opening holding mechanism (2) is detachably arranged on the fire door body (1); the automatic door closing mechanism (3) is fixedly installed on the fire door body (1); the characteristics are: The product of the door closing force F2 applied by the automatic door closing mechanism (3) on the door and the distance L2 from the straight line where the rotation axis of the fire door body (1) is located is M2, and the product of the door opening force F1 applied by the door opening holding mechanism (2) on the door and the distance L1 from the straight line where the rotation axis of the fire door body (1) is located is M1. When M2 is greater than M1, the fire door body (1) is pushed to close automatically; when M2 is less than or equal to M1, the fire door body (1) remains in an open state; when a fire generates high temperature, the door opening holding mechanism (2) is destroyed to make its door opening force F1 disappear, and the automatic door closing mechanism (3) pushes the fire door body (1) to close automatically.

2. A fire door that is easy to keep open and can be closed automatically according to claim 1, characterized in that: The door opening holding mechanism (2) comprises a pull rope fixing seat (21), a movable pulling component (22), and a pulling rope (23); the pull rope fixing seat (21) is fixedly mounted on a wall; the movable pulling component (22) is fixedly mounted on a side of the fire door body (1) close to the wall; the pulling rope (23) is made of a fusible material; the movable pulling component (22) comprises a pulling base (221), a sliding guide rail assembly (222), and a pulling spring (223); the pulling base (221) is provided with a mounting groove (224), the sliding guide rail assembly (222) is arranged in the installation groove (224), and a slider (2221) capable of reciprocating sliding is provided in the sliding guide rail assembly (222), one end of the traction spring (223) is fixed to one end of the installation groove (224), and the other end of the traction spring (223) is fixed to the slider (2221); the slider (2221) is further connected to one end of the traction rope (23); the other end of the traction rope (23) is fixed to the pull rope fixing seat (21).

3. A fire door that is easy to keep open and can be closed automatically according to claim 2, characterized in that: During the process of the fire door body (1) rotating from an open state to a closed state, the slider (2221) slides in the installation groove (224) under the combined action of the traction rope (23) and the traction spring (223).

4. A fire door that is easy to keep open and can be closed automatically according to claim 2, characterized in that: The door opening holding mechanism (2) further comprises a key power generation device (25) and an alarm device (24); the key power generation device (25) and the alarm device (24) are electrically connected; when a fire generates high temperature, the traction rope (23) is melted, and after the traction rope (23) is melted, the traction spring (223) drives the slider (2221) to collide with the key power generation device (25) to generate electricity, thereby controlling the alarm device (24) to send out an alarm signal.

5. A fire door that is easy to keep open and can be closed automatically according to any one of claims 1 to 4, characterized in that: The fire door body (1) comprises a door panel (11), a door handle (12), a door frame (13) and a hinge (14); the door handle (12) is mounted on the door panel (11); the door panel (11) and the door frame (13) are fixedly connected via the hinge (14); and the automatic door closing mechanism (3) is mounted on the upper part of the door frame (13) and is connected to the upper side of the door panel (11).

6. A fire door that is easy to keep open and can be closed automatically according to claim 5, characterized in that: The automatic door closing mechanism (3) is an automatic door closer.

7. A fire door that is easy to keep open and can be closed automatically according to claim 4, characterized in that: The key-operated power generation device (25) uses purchased standard parts, and comprises a power generation key, a power generation coil, and a magnetic field formed by a permanent magnet.

8. A fire door that is easy to keep open and can be closed automatically according to claim 2, characterized in that: The traction base (221) is detachably fixed on the door panel (11) by means of screws.

9. A fire door that is easy to keep open and can be closed automatically according to claim 2, characterized in that: The pull rope fixing seat (21) or the slider (2221) is provided with a fusible hook, and the two ends of the traction rope (23) are respectively fixed to the pull rope fixing seat (21) and the slider (2221) through the fusible hook.

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