CN111852291A

CN111852291A - Fire window capable of being automatically closed

Info

Publication number: CN111852291A
Application number: CN202010742355.3A
Authority: CN
Inventors: 冯杰慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-02
Filing date: 2020-08-02
Publication date: 2020-10-30

Abstract

The invention provides a fire window capable of being automatically closed, which comprises a window frame, a window, a pulley, a pull rope, a worm gear, a worm, a supporting plate and a shell, the worm is rotatably connected between the two support plates and meshed with the worm wheel, one end of the connecting rod is fixedly connected with the middle of the first transverse plate, the middle of the second transverse plate is fixedly connected with the other end of the connecting rod, one end of the spiral spring is fixedly connected with the bottom surface of the inner cavity of the shell, the other end of the spiral spring is fixedly connected with the bottom of the second transverse plate, one end of the cylinder is fixedly installed on the top surface of the inner cavity of the shell, the piston is connected with the inner wall of the cylinder in a sliding and sealing mode to form a sealed cavity, the sealed cavity is filled with heated expansion substances, one end of the ejector rod is fixedly connected with the piston, and the other end of the ejector rod is located over the second transverse plate. The invention can automatically close the fire window when a fire disaster happens, and the whole structure is simple.

Description

Fire window capable of being automatically closed

Technical Field

The invention relates to the technical field of doors and windows, in particular to a fireproof window capable of being automatically closed.

Background

A fire refers to a disaster caused by combustion that is out of control in time or space. Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally. Three conditions are required for the formation of a fire: combustible materials, air and fire sources, and fire extinguishing is usually carried out by methods of suffocation, cooling, fire species removal and the like after a fire occurs. When a fire occurs, the indoor temperature reaches 400 ℃ and gradually rises, and it is necessary to take fire prevention measures to control the spread or spread of the fire. Most of the existing fire windows adopt an automatic detection and control system to close the window when a fire disaster happens, and the existing fire windows are complex in structure and high in cost.

Disclosure of Invention

In order to overcome the problems that the conventional fire window is mostly closed by adopting an automatic detection and control system when a fire disaster happens, the structure is complex and the cost is high, the invention provides the fire window capable of being automatically closed, and the specific technical scheme is as follows:

a fire window capable of being automatically closed comprises a window frame, a window, pulleys and a pull rope, wherein one end of the window is hinged to the upper portion of the window frame through a hinge, the pulleys are fixedly arranged at the top end of the window frame, the pull rope is wound on a groove of the pulleys, one end of the pull rope is fixedly arranged at the other end of the window, the fire window further comprises a worm wheel, a worm, a supporting plate, a shell, a first transverse plate, a connecting rod, a second transverse plate, a limit stop block, a spiral spring, a cylinder, a piston and a push rod, the supporting plate is provided with two supporting plates which are parallel to each other, the worm wheel is rotatably connected onto the window frame through a rotating shaft, the other end of the pull rope is fixedly arranged on the rotating shaft, the worm penetrates through the two supporting plates and is rotatably connected into the two supporting plates and is meshed, one end of each of the two support plates is fixedly connected with two ends of the first transverse plate respectively, one end of each of the connecting rods is fixedly connected with the middle of the first transverse plate, the other end of each of the connecting rods penetrates through the shell and is positioned in the inner cavity of the shell, the middle of the second transverse plate is fixedly connected with the other end of each of the connecting rods, the limiting blocks are fixedly arranged on the connecting rods and are positioned in the inner cavity of the shell, one end of each of the spiral springs is fixedly connected with the bottom surface of the inner cavity of the shell, the other end of each of the spiral springs is fixedly connected with the bottom of the second transverse plate, one end of each of the cylinders is closed and is open, one end of each cylinder is fixedly arranged on the top surface of the inner cavity of the shell and is positioned on two sides of the connecting rod, the open end of each cylinder is opposite, one end of the ejector rod is fixedly connected with the piston, and the other end of the ejector rod is located right above the second transverse plate.

Optionally, the thermally expansive substance is paraffin.

Optionally, the thermally expandable material is expanded graphite.

Optionally, the window frame is made of an aluminum alloy material.

Optionally, the housing is in a hollow square tube shape and made of an aluminum alloy material.

Optionally, the first transverse plate and the second transverse plate are parallel to each other.

Optionally, the helix angle of the worm is less than the friction angle of the worm gear contact.

The beneficial effects obtained by the invention comprise: through setting up worm, worm wheel, coil spring, drum, piston and ejector pin, not only can make the worm wheel and worm mesh better together in order to adjust the window aperture, can also make fire window self-closing when the conflagration takes place, avoid the intensity of a fire to stretch, its overall structure is simple, and the cost is lower, is fit for promoting.

Drawings

The present invention will be further understood from the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.

Fig. 1 is a schematic view of an overall structure of an automatically closable fire window according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a schematic diagram of the structural relationship among the cylinder, the piston and the ram in the embodiment of the present invention.

Description of reference numerals:

1. a window frame; 2. a window; 3. a pulley; 4. a worm gear; 5. a worm; 6. a support plate; 7. pulling a rope; 8. a housing; 9. a first transverse plate; 10. a connecting rod; 11. a second transverse plate; 12. a limit stop block; 13. a cylinder; 14. a coil spring; 15. a piston; 16. a top rod; 17. the chamber is sealed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof.

The invention relates to a fire window capable of being automatically closed, which explains the following embodiments according to the attached drawings:

the first embodiment is as follows:

referring to fig. 1 and 2, the fire window capable of being automatically closed includes a window frame 1, a window 2, a pulley 3 and a pull rope 7, wherein one end of the window 2 is hinged to the upper portion of the window frame 1 through a hinge, the pulley 3 is fixedly disposed at the top end of the window frame 1, a groove is formed on the circumferential surface of the pulley 3, the pull rope 7 is wound on the groove of the pulley 3, and one end of the pull rope 7 is fixedly disposed at the other end of the window 2. Specifically, one end of the pull rope 7 is arranged in the middle of a side frame of the window 2 far away from the window frame 1, and the other end of the pull rope 7 crosses over a groove of the pulley 3 through the outer side of the window 2 and then is fixedly connected with the rotating shaft.

Referring to fig. 1, 2 and 3, the fire window further includes a worm wheel 4, a worm 5, support plates 6, a housing 8, a first transverse plate 9, a connecting rod 10, a second transverse plate 11, a limit stop 12, a coil spring 14, a cylinder 13, a piston 15 and a push rod 16, the first transverse plate 9 and the second transverse plate 11 are parallel to each other, the two support plates 6 are provided with two support plates 6, the two support plates 6 are parallel to each other, the worm wheel 4 is rotatably connected to the window frame 1 through a rotating shaft, the other end of the pull rope 7 is fixedly arranged on the rotating shaft, the worm 5 passes through the two support plates 6 and is rotatably connected to the two support plates 6 and meshed with the worm wheel 4, the housing 8 is arranged on the window frame 1 and below the worm 5, one ends of the two support plates 6 are respectively fixedly connected to two ends of the first transverse plate 9, one end of the connecting rod 10 is fixedly connected to the middle of the, the other end of the connecting rod 10 passes through the shell 8 and is positioned in the inner cavity of the shell 8, the middle part of the second transverse plate 11 is fixedly connected with the other end of the connecting rod 10, the limit stop 12 is fixedly arranged on the connecting rod 10 and is positioned in the inner cavity of the shell 8, one end of the spiral spring 14 is fixedly connected with the bottom surface of the inner cavity of the shell 8, the other end of the spiral spring 14 is fixedly connected with the bottom of the second transverse plate 11, one end of the cylinder 13 is closed, and the other end is opened, one end of the cylinder 13 is fixedly arranged on the top surface of the inner cavity of the shell 8 and positioned at two sides of the connecting rod 10, the open end of the cylinder 13 is opposite to the second cross plate 11, the piston 15 is connected with the inner wall of the cylinder 13 in a sliding and sealing way to form a sealed chamber 17, the sealed chamber 17 is filled with a thermal expansion substance, one end of the ejector rod 16 is fixedly connected with the piston 15, and the other end of the ejector rod 16 is located right above the second transverse plate 11. By adjusting the lengths of the coil spring 14, the link 10 and the support plate 6, the worm 5 and the worm wheel 4 can be better engaged with each other by the elastic force of the coil spring 14, so that the user can adjust the opening degree of the window 2 by rotating the worm 5.

In case of no fire, the other end of the post rod 16 is suspended and not in contact with the second cross plate 11. The worm 5 is engaged with the worm wheel 4. The worm 5 is rotated to rotate the worm wheel 4, and the pull cord 7 is wound around the rotation shaft of the worm wheel 4 to be retracted or released, and the pull cord 7 slides on the pulley 3 to pull the window 2 to be opened or closed. When a fire disaster occurs, the indoor temperature rises, high-temperature gas diffuses outdoors through the window 2, the thermal expansion substance in the sealed chamber 17 expands due to heating, the volume of the thermal expansion substance increases, the piston 15 and the ejector rod 16 are pushed to move towards the second transverse plate 11, the ejector rod 16 enables the connecting rod 10, the first transverse plate 9, the supporting plate 6 and the worm 5 to move downwards by pushing the second transverse plate 11, and finally the worm 5 is separated from the worm wheel 4. At the moment, the rotating shaft rotates under the action of the self gravity of the window sash, and the fireproof window is automatically closed. The indoor and outdoor air circulation is blocked, so that the indoor high-temperature gas can be prevented from diffusing, the fire can be prevented from spreading, and the outdoor air can be prevented from entering the room, so that the indoor flame can be automatically extinguished due to the exhaustion of oxygen.

Compared with the fire window which adopts an automatic detection and control system to close the window 2 when a fire disaster occurs in the prior art, the fire window can effectively automatically close the window when the fire disaster occurs through the common cheap components such as the shell 8, the spiral spring 14, the worm 5, the worm wheel 4 and the like, so that the fire spread is avoided, and the fire window has a simple integral structure and lower cost.

In practical application, when the fire window is normally opened and closed, the spiral spring 14 is in a compressed state, and generates certain elastic force to enable the connecting rod 10, the supporting plate 6 and the worm 5 to keep an upward movement trend, and the worm 5 and the worm wheel 4 are just meshed together under the elastic force of the spiral spring 14. At this time, the limit stop 12 contacts with the top surface of the inner cavity of the housing 8, so as to limit the connecting rod 10 and the second transverse plate 11 to move upwards continuously, and avoid the problem that the worm 5 cannot drive the worm wheel 4 smoothly through the worm 5 due to overlarge friction force between the worm 5 and the worm wheel 4. Therefore, when the heated expanding substance in the sealed chamber 17 expands by the heated volume, the piston 15 and the mandril 16 are pushed to move, the downward displacement of the support plate 6 and the worm 5 is greater than the tooth height of the worm 5, the worm 5 is completely separated from the worm wheel 4, and the fire window is automatically closed under the action of the self gravity of the window 2.

The worm wheel 4, the worm 5, the window frame 1, the support plate 6, and the housing 8 are made of a metal material having good thermal conductivity, and the metal material is preferably an aluminum alloy having good thermal conductivity. So, the indoor temperature of sensing that fire prevention window can be better in time makes cylinder shape memory alloy thermal elongation when the conflagration takes place, and then 5 worm wheels of worm 4 break away from, closes window 2 in order to avoid the intensity of a fire to spread.

Example two:

The unfolding helical angle of the worm 5 is smaller than the friction angle of the worm wheel 4 in worm contact. In this way, a self-locking of the worm 5 and the worm wheel 4 can be achieved, so that only the worm 5 can drive the worm wheel 4. When a fire disaster does not happen, the window 2 can be conveniently opened to a certain angle by rotating the worm 5, the worm wheel 4 cannot rotate under the self gravity of the window 2, and then the worm 5 is driven to rotate, so that the window 2 is automatically closed under the self gravity.

In this example, the cylinder 13 is also made of an aluminum alloy material with good thermal conductivity, and the dimensions of the cylinder 13 and the rod 16 can be set according to the size of the door or window, which is not described herein again.

When the pressure is below 0.36MPa and the temperature is increased from 25 ℃ to 61 ℃, the volume expansion rate of the paraffin is gradually increased to 13.2%, and the volume expansion rate of the paraffin at the temperature near the melting point temperature is almost linearly changed with the temperature. Therefore, in the present invention, the heat expandable material is paraffin, and when the temperature of the housing 8, the cylinder 13 or the window frame 1 is greater than 60 degrees, that is, the paraffin temperature is greater than 60 degrees, it is determined that a fire occurs in the room. At this time, the paraffin expands to push the piston 15 and the push rod 16 to move, and further, the second transverse plate 11 is driven to move, so that the worm 5 is separated from the worm wheel 4, and the door and the window are closed. When indoor flame goes out and the indoor temperature is reduced, the paraffin is cooled to reduce the volume, the worm 5 is re-meshed with the worm wheel 4 under the elastic force action of the spiral spring 14, and the window 2 can be opened again by rotating the worm 5.

Example three:

The thermally expandable material may also be expanded graphite having an initial temperature greater than 100 degrees and less than 300 degrees. Because the expanded graphite can instantaneously expand by tens to hundreds of times in volume when encountering high temperature, when the expanded graphite is heated and expanded due to a fire in a room, the piston 15 and the ejector rod 16 can be instantaneously pushed to move, so that the elasticity of the spiral spring 14 can be overcome, the worm 5 and the worm wheel 4 are quickly separated, the door and the window are closed, the fire is prevented from spreading, and the response time is shortened.

In summary, the fire window capable of being automatically closed disclosed by the present invention has the following beneficial technical effects: through setting up worm, worm wheel, coil spring, drum, piston and ejector pin, not only can make the worm wheel and worm mesh better together in order to adjust the window aperture, can also make fire window self-closing when the conflagration takes place, avoid the intensity of a fire to stretch, its overall structure is simple, and the cost is lower, is fit for promoting.

Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.

Claims

1. A fire window capable of being automatically closed comprises a window frame, a window, pulleys and a pull rope, wherein one end of the window is hinged to the upper portion of the window frame through a hinge, the pulleys are fixedly arranged at the top end of the window frame, the pull rope is wound on a groove of the pulleys, one end of the pull rope is fixedly arranged at the other end of the window, the fire window is characterized by further comprising a worm wheel, a worm, a supporting plate, a shell, a first transverse plate, a connecting rod, a second transverse plate, a limit stop block, a spiral spring, a cylinder, a piston and a push rod, the two supporting plates are arranged on the supporting plates and are parallel to each other, the worm wheel is rotatably connected onto the window frame through a rotating shaft, the other end of the pull rope is fixedly arranged on the rotating shaft, the worm penetrates through the two supporting plates and is rotatably connected into the two supporting plates and is meshed, one end of each of the two support plates is fixedly connected with two ends of the first transverse plate respectively, one end of each of the connecting rods is fixedly connected with the middle of the first transverse plate, the other end of each of the connecting rods penetrates through the shell and is positioned in the inner cavity of the shell, the middle of the second transverse plate is fixedly connected with the other end of each of the connecting rods, the limiting blocks are fixedly arranged on the connecting rods and are positioned in the inner cavity of the shell, one end of each of the spiral springs is fixedly connected with the bottom surface of the inner cavity of the shell, the other end of each of the spiral springs is fixedly connected with the bottom of the second transverse plate, one end of each of the cylinders is closed and is open, one end of each cylinder is fixedly arranged on the top surface of the inner cavity of the shell and is positioned on two sides of the connecting rod, the open end of each cylinder is opposite, one end of the ejector rod is fixedly connected with the piston, and the other end of the ejector rod is located right above the second transverse plate.

2. A self-closing fire protection window as claimed in claim 1, wherein the thermally expansive substance is paraffin.

3. An automatically closable fire window according to any of the preceding claims, wherein the thermally expandable substance is expanded graphite.

4. A self-closing fire window according to any preceding claim, wherein the window frame is made of an aluminium alloy material.

5. An automatically closable fire window according to any of the preceding claims, wherein the outer casing is hollow square tube shaped and made of an aluminium alloy material.

6. The self-closing fire protection window of any one of the preceding claims, wherein the first and second cross panels are parallel to one another.

7. An automatically closable fire window according to any of the preceding claims, wherein the helix angle of the worm is less than the angle of friction of the worm gear contact.