Combined fire resisting shutter linkage release device

Abstract

The utility model provides a combined fire resisting shutter linkage release device which comprises a mechanical stay wire and at least one fuse. The mechanical stay wire is used for connecting door closers of all the single-frame roller shutters, at least one end of the mechanical stay wire is connected with a wire tightener, and the wire tightener is used for being connected with the ground or hanging a heavy hammer so as to tension the mechanical stay wire; the at least one fuse is connected to the mechanical stay wire in series, and the fuse is used for being broken when the temperature reaches a set interval so that the mechanical stay wire can be loosened; and when the mechanical stay wire is loosened, each door closer is triggered, so that each single-frame roller shutter is synchronously released according to the self weight. According to the combined fire resisting shutter linkage release device, synchronous release of all single-frame roller shutters can be achieved when the fuse is heated and fractured, synchronous release of all single-frame roller shutters can be achieved by manually loosening the tighteners, operation is labor-saving and efficient, and safety is high. The response timeliness of automatic releasing and closing of the combined fire resisting shutter according to gravity can be improved, and therefore fire spreading is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fireproof curtain, concretely relates to a combined fireproof curtain linkage release device. BACKGROUND

[0002] The atrium of a large commercial complex project is a large-span, column-free, curve-shaped and transparent commercial space, and the fireproof curtain for fire compartment has high requirements, especially needs to have the function of closing by itself based on self-weight without relying on power supply or other external power. The combined fireproof curtain is mainly composed of a plurality of single-hung inorganic composite fireproof curtains, and each single-hung curtain is provided with a door closer, and triggering the door closer can make the curtain release and close under the action of its own gravity. The current problem is that closing the combined fireproof curtain needs to trigger each door closer manually, which not only may lead to the danger of fire spreading due to the delay of manual operation and the delay of closing the fireproof curtain when the fire is not monitored in time, but also is time-consuming and laborious and is easy to delay the fire blocking opportunity and cause personnel injury, so it is urgent to seek a solution. SUMMARY

[0003] The utility model embodiment provides a combined fireproof curtain linkage release device, which aims at improving the closing timeliness and convenience of the combined fireproof curtain.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a combined fireproof curtain linkage release device, which comprises a mechanical pull wire and at least one fuse. The mechanical pull wire is used for connecting the door closers of each single-hung curtain, at least one end of the mechanical pull wire is connected with a line tightener, the line tightener is used for connecting the ground or a suspended weight to tension the mechanical pull wire, and the at least one fuse is connected in series on the mechanical pull wire and is used for breaking to release the mechanical pull wire when the temperature reaches the set interval. Wherein, when the mechanical pull wire is tensioned, each door closer is in a locked state, and when the mechanical pull wire is released, each door closer is triggered to be unlocked to make each single-hung curtain release synchronously by self-weight.

[0005] In a possible implementation manner, the line tightener comprises a fixed arm, a ratchet wheel, a swing arm, a first pawl and a second pawl. One end of the fixed arm is used for connecting the ground or suspending the weight, the middle part is rotationally connected with a winding shaft for winding the mechanical pull wire, and the other end is provided with a limit stop lever. The ratchet wheel is sleeved and fixed on the winding shaft. One end of the swing arm is rotationally connected with the winding shaft, and the other end is provided with an operating handle. The first pawl is hinged to the swing arm and movably connected with the ratchet wheel. The second pawl is hinged to the fixed arm and movably connected with the ratchet wheel. Wherein, when the swing arm swings forward, the first pawl is engaged with the ratchet wheel and the second pawl is disengaged from the ratchet wheel, and when the swing arm swings reversely, the first pawl is disengaged from the ratchet wheel and the second pawl is engaged with the ratchet wheel.

[0006] In some embodiments, the first pawl is provided with a long hole extending perpendicularly to the length direction of the swing arm; the swing arm is connected with a tension spring, one end of the tension spring is hung on the long hole; wherein, when the hung end of the tension spring slides to one end of the long hole, the first pawl is pulled to swing to make the first pawl elastically abut against the ratchet wheel; when the hung end of the tension spring slides to the other end of the long hole, the first pawl is pulled to swing to make the first pawl separate from the ratchet wheel.

[0007] For example, the hole wall of the long hole close to the tension spring is an arc wall, and two ends of the long hole are formed with clamping grooves suitable for hanging the tension spring based on the arc wall.

[0008] For example, a torsion spring is sleeved on the hinged shaft of the second pawl, and the second pawl elastically abuts against the ratchet wheel based on the elastic force of the torsion spring.

[0009] In a possible implementation, the second pawl is provided with a wrench plate extending along the radial direction of the hinged shaft.

[0010] In some embodiments, the middle part of the fixed arm is provided with a protective shell, and the winding shaft is arranged in the protective shell.

[0011] For example, one end of the fixed arm is connected with a hook, and the other end is provided with a wire sleeve; the hook is used for connecting the ground or hanging a heavy weight, and the wire sleeve is suitable for the mechanical pull wire to pass through and guide the mechanical pull wire to wind on the winding shaft.

[0012] For example, the two ends of the mechanical pull wire are connected with the line tightener.

[0013] The combined fireproof curtain linkage release device has the advantages that, compared with the prior art, the combined fireproof curtain linkage release device of the utility model, after the mechanical pull wire is connected with the door closers of each single-hung curtain, the line tightener arranged at least one end of the mechanical pull wire is used to apply tension to the mechanical pull wire, so that each door closer keeps a normal locking state under the tension of the mechanical pull wire; when the fuse connected in series with the mechanical pull wire is broken due to heat, the mechanical pull wire loses tension and relaxes, thereby triggering each door closer to release the locking state, and further enabling each single-hung curtain to realize synchronous release and closing under the action of gravity, which not only enables all single-hung curtains to realize synchronous release by triggering each door closer at the same time by using the heat-induced breaking of the fuse in the case that the fire is not discovered in time, but also enables all single-hung curtains to realize synchronous release by triggering each door closer at the same time by relaxing the line tightener in the case that the fuse is not broken due to the discovery of the fire by a person, so that the operation is labor-saving and efficient, the response timeliness of the combined fireproof curtain to automatically release and close under gravity is improved, and the spread of fire is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure diagram of the combined fireproof curtain linkage release device is provided.

[0015] Figure 2 A structure schematic view of the tightener in tensioning the mechanical pull wire;

[0016] Figure 3 A structure schematic view of the tightener in relaxing the mechanical pull wire;

[0017] Figure 4 A structure schematic view of the tightener in tensioning the mechanical pull wire; Figure 2 A structure schematic view of the tightener in tensioning the mechanical pull wire;

[0018] In the figure: 10, mechanical pull wire; 20, tightener; 21, fixed arm; 211, hook; 212, wire sleeve; 22, winding shaft; 23, ratchet; 24, swing arm; 241, operation handle; 25, first pawl; 251, long hole; 252, arc wall surface; 253, clamping groove; 26, second pawl; 261, wrench plate; 27, tension spring; 28, protective shell; 30, fuse. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0020] It should be noted that when an element is referred to as "set on", "connected to" another element, it can be directly on another element or indirectly on another element. It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or several features. In the description of the present application, the meaning of "multiple", "several" is two or more than two, unless otherwise specifically limited.

[0021] Please see Figures 1 to 4The utility model provides a combined fireproof curtain linkage release device, which comprises a mechanical pull wire 10 and at least one fuse 30. The mechanical pull wire 10 is used to connect door closers of each single-hung curtain. At least one end of the mechanical pull wire 10 is connected to a line tightener 20, which is used to connect the ground or a suspended weight to tension the mechanical pull wire 10. At least one fuse 30 is connected in series to the mechanical pull wire 10. The fuse 30 is used to break when the temperature reaches a set interval, so that the mechanical pull wire 10 is relaxed. When the mechanical pull wire 10 is tensioned, each door closer is in a locked state. When the mechanical pull wire 10 is relaxed, each door closer is triggered to be unlocked, so that each single-hung curtain is released synchronously by gravity.

[0022] It should be noted that the door closer can be understood as a mechanical device for releasing the brake of the single-hung curtain. The specific triggering mode can be an elastic swing lever switch or an elastic expansion switch. Taking the elastic swing lever switch as an example, the elastic swing lever can be compressed by the tensioned mechanical pull wire 10 to maintain the initial state. At this time, the door closer is in a locked state. When the mechanical pull wire 10 is relaxed, the elastic swing lever swings based on its elastic force, thereby triggering the door closer to act to release the brake of the curtain to achieve the release of the curtain by gravity. The structure of the door closer and the principle of releasing the brake of the curtain are both prior art, and will not be described in detail here.

[0023] In the embodiment, the fuse 30 can be a fusible alloy sheet with a melting point of about 70°C. The mechanical pull wire 10 is connected to the fuse 30, thereby forming a series connection of the fuse 30 on the mechanical pull wire 10. When the ambient temperature rises due to a fire, the fuse 30 is heated and broken, which is equivalent to the mechanical pull wire 10 being broken, thereby losing tension on the entire mechanical pull wire 10, and triggering each door closer simultaneously. It should be noted that, considering the large span of the combined fireproof curtain, in order to improve the temperature sensing sensitivity of the fuse 30 to the fire area, a plurality of fuses 30 can be connected in series on the mechanical pull wire 10 at intervals. Specifically, at least one fuse 30 can be connected in series near each door closer.

[0024] In the embodiment, the line tightener 20 can be provided at one end of the mechanical pull wire 10, or at both ends of the mechanical pull wire 10. Considering the length of the mechanical pull wire 10, it is preferable to connect the line tightener 20 to both ends of the mechanical pull wire 10, thereby ensuring the overall tension of the mechanical pull wire 10.

[0025] Compared with the prior art, the combined fireproof curtain linkage release device provided by the embodiment is characterized in that: after the door closers of each single-hung curtain are connected with the mechanical pull wire 10, the mechanical pull wire 10 is applied with tension by the line tightener 20 arranged at at least one end of the mechanical pull wire 10, so that each door closer keeps a normal locking state under the tension of the mechanical pull wire 10; when the fuses 30 connected in series on the mechanical pull wire 10 are broken due to heat, the mechanical pull wire 10 loses the tension and relaxes, thereby triggering each door closer to release the respective locking state, and further enabling each single-hung curtain to be closed synchronously under the action of gravity, which not only enables all the single-hung curtains to be closed synchronously by triggering each door closer simultaneously by the heat-induced breaking of the fuses 30 in the case that the fire is not discovered in time, but also enables all the single-hung curtains to be closed synchronously by triggering each door closer simultaneously by relaxing the line tightener 20 in the case that the fire is discovered by a person and the fuses 30 have not been broken, which is labor-saving and efficient, and can improve the response timeliness of the combined fireproof curtain to automatically release and close under gravity, thereby avoiding the spread of fire.

[0026] In some embodiments, referring to Figures 2 to 4 , the line tightener 20 comprises a fixed arm 21, a ratchet wheel 23, a swing arm 24, a first pawl 25 and a second pawl 26; one end of the fixed arm 21 is used to be connected with the ground or a suspended weight, the middle part is rotatably connected with a winding shaft 22 for winding the mechanical pull wire 10, and the other end is provided with a limiting stopper; the ratchet wheel 23 is sleeved and fixed on the winding shaft 22; one end of the swing arm 24 is rotatably connected with the winding shaft 22, and the other end is provided with an operating handle 241; the first pawl 25 is hinged to the swing arm 24 and movably connected with the ratchet wheel 23; the second pawl 26 is hinged to the fixed arm 21 and movably connected with the ratchet wheel 23; wherein, when the swing arm 24 swings forward, the first pawl 25 is engaged with the ratchet wheel 23 and the second pawl 26 is disengaged from the ratchet wheel 23; when the swing arm 24 swings reversely, the first pawl 25 is disengaged from the ratchet wheel 23 and the second pawl 26 is engaged with the ratchet wheel 23.

[0027] When the swing arm 24 swings forward, the first pawl 25 drives the ratchet wheel 23 to rotate through the engagement of the first pawl 25 and the ratchet wheel 23, so as to wind the mechanical pull wire 10 on the winding shaft 22, thereby tightening the mechanical pull wire 10; after the swing arm 24 swings a certain angle, it starts to swing reversely, at this time, the first pawl 25 moves around the ratchet wheel 23 with the swing arm 24, and at the same time, the second pawl 26 is engaged with the ratchet wheel 23 to avoid the reverse rotation of the ratchet wheel 23; when the swing arm 24 swings reversely and returns to the original position, it swings forward again to continue tightening the mechanical pull wire 10, and the operation is repeated until the mechanical pull wire 10 obtains the target tension, which is convenient and labor-saving; when it is needed to relax the mechanical pull wire 10, the ratchet wheel 23 is free to rotate by disengaging the first pawl 25 and the second pawl 26 from the ratchet wheel 23, thereby triggering each door closer to be unlocked simultaneously by operating the line tightener 20, so as to realize the linkage release of the combined fireproof curtain.

[0028] In some possible implementation manners, please refer to Figure 2 and Figure 4 , the first pawl 25 is provided with a long hole 251 extending perpendicularly to the length direction of the swing arm 24, and the swing arm 24 is connected with a tension spring 27, one end of the tension spring 27 is hung on the long hole 251; wherein, when the hung end of the tension spring 27 slides to one end of the long hole 251, the first pawl 25 is pulled to swing to make the first pawl 25 elastically abut against the ratchet wheel 23; when the hung end of the tension spring 27 slides to the other end of the long hole 251, the first pawl 25 is pulled to swing to make the first pawl 25 separate from the ratchet wheel 23. The elastic pulling force provided by the tension spring 27 drives the first pawl 25 to abut against the circumferential wall tooth groove of the ratchet wheel 23 or swing away from the ratchet wheel 23, thereby on the one hand, the cooperation stability of the first pawl 25 and the ratchet wheel 23 can be improved, on the other hand, when it is needed to release the mechanical pull wire 10, the hung end of the tension spring 27 can be moved from one end to the other end of the long hole 251, so that the first pawl 25 is away from the ratchet wheel 23, then only by swinging the second pawl 26 away from the ratchet wheel 23, the rotation freedom of the ratchet wheel 23 can be released, thereby the operation convenience is improved.

[0029] Specifically, as shown in Figure 4 , in the embodiment, the hole wall of the long hole 251 close to the tension spring 27 is an arc wall surface 252, and two ends of the long hole 251 are respectively formed with a clamping groove 253 suitable for hanging the tension spring 27 based on the arc wall surface 252. On the one hand, the hung end of the tension spring 27 can be conveniently slid along the arc wall surface 252 to switch the clamping position, on the other hand, the hanging stability of the tension spring 27 at the end of the long hole 251 can be improved, thereby the cooperation reliability of the first pawl 25 and the ratchet wheel 23 is improved.

[0030] It should be noted that, please refer to Figure 2 and Figure 3 , the hinged shaft of the second pawl 26 is sleeved with a torsion spring, and the second pawl 26 elastically abuts against the ratchet wheel 23 based on the elastic force of the torsion spring. By setting the torsion spring, the second pawl 26 can be kept abutting against the circumferential wall tooth groove of the ratchet wheel 23, thereby the cooperation stability between the second pawl 26 and the ratchet wheel 23 is improved.

[0031] In order to facilitate operation, please refer to Figure 2 and Figure 3 , the second pawl 26 is provided with a wrench plate 261 extending along the radial direction of the hinged shaft thereof. When it is needed to release the mechanical pull wire 10, after the tension spring 27 is moved to the clamping groove 253 capable of pulling the first pawl 25 away from the ratchet wheel 23, the second pawl 26 can be separated from the ratchet wheel 23 by pressing or wrenching the wrench plate 261 to overcome the elastic force of the torsion spring, thereby the rotation freedom of the ratchet wheel 23 is released, and the operation is simple and labor-saving.

[0032] In some embodiments, as shown in Figure 2 The middle part of the fixed arm 21 is provided with a protective shell 28, and the winding shaft 22 is arranged in the protective shell 28. By arranging the protective shell 28, the mechanical pull wire 10 wound on the winding shaft 22 can be hidden in the protective shell 28, which can avoid the exposure of the winding shaft 22 and the wound mechanical pull wire 10, and can also use the protective shell 28 to axially constrain the mechanical pull wire 10, so as to avoid the wound mechanical pull wire 10 from falling off the winding shaft 22.

[0033] Optionally, referring to Figure 2 and Figure 3 , one end of the fixed arm 21 is connected with a hook 211, and the other end is provided with a wire sleeve 212; the hook 211 is used to connect the ground or hang a heavy weight, and the wire sleeve 212 is suitable for the mechanical pull wire 10 to pass through and guide the mechanical pull wire 10 to wind on the winding shaft 22. By arranging the hook 211, the ground (a hanging ring structure can be arranged) or the heavy weight can be conveniently connected; at the same time, the wire sleeve is used to guide the mechanical pull wire 10, so as to improve the stability of the mechanical pull wire 10 winding on the winding shaft 22.

[0034] For example, referring to Figure 1 Both ends of the mechanical pull wire 10 are connected with the wire tightener 20. The problem of uneven tension distribution of both ends of the mechanical pull wire 10 due to the too long mechanical pull wire 10 is avoided, so as to improve the tension reliability of the mechanical pull wire 10.

[0035] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A combination fire shutter linkage release device characterised in that, The application relates to a mechanical pull wire for connecting door closers of single-hung roller shutters, at least one end of the mechanical pull wire being connected with a tightener for connecting the ground or a suspended heavy hammer to tension the mechanical pull wire, at least one fuse being connected in series with the mechanical pull wire, the fuse being used for breaking when the temperature reaches a set interval to release the mechanical pull wire, wherein each of the door closers is in a locking state when the mechanical pull wire is tensioned, and each of the door closers is triggered to be unlocked to synchronously release each of the single-hung roller shutters by gravity when the mechanical pull wire is released. The tightener comprises a fixed arm, one end of the fixed arm being used for connecting the ground or suspending the heavy hammer, a middle part of the fixed arm being rotatably connected with a winding shaft for winding the mechanical pull wire, a ratchet being sleeved on the winding shaft, a swing arm, one end of the swing arm being rotatably connected with the winding shaft, the other end of the swing arm being provided with an operating handle, a first pawl being hinged on the swing arm and being movably connected with the ratchet, and a second pawl being hinged on the fixed arm and being movably connected with the ratchet, wherein the first pawl is engaged with the ratchet and the second pawl is disengaged from the ratchet when the swing arm is forward swung, and the first pawl is disengaged from the ratchet and the second pawl is engaged with the ratchet when the swing arm is reversely swung. A long slot is arranged on the first pawl and extends perpendicularly to the length direction of the swing arm, a tension spring is connected on the swing arm, one end of the tension spring is hung on the long slot, and the first pawl is elastically abutted against the ratchet when the hanging end of the tension spring slides to one end of the long slot to pull the first pawl to swing, and the first pawl is separated from the ratchet when the hanging end of the tension spring slides to the other end of the long slot to pull the first pawl to swing. An arc-shaped wall surface is arranged on the hole wall of the long slot close to the tension spring, and a clamping groove suitable for hanging the tension spring is formed at each end of the long slot based on the arc-shaped wall surface.

2. The combination fire shutter linkage release as claimed in claim 1 wherein, A torsion spring is sleeved on the hinged shaft of the second pawl, and the second pawl is elastically abutted against the ratchet based on the elastic force of the torsion spring. A wrench plate extending along the radial direction of the hinged shaft of the second pawl is arranged on the second pawl. A protection shell is arranged on the middle part of the fixed arm, and the winding shaft is arranged in the protection shell. A hook is connected to one end of the fixed arm, and a wire guide sleeve is arranged on the other end of the fixed arm, the hook is used for connecting the ground or hanging the heavy hammer, and the wire guide sleeve is suitable for the mechanical pull wire to pass through and guide the mechanical pull wire to wind on the winding shaft. The tightener is connected to both ends of the mechanical pull wire. ​ ​ 3. The combination fire shutter linkage release as claimed in claim 2 wherein, ​ 4. The combination fire shutter linkage release device of claim 3, wherein, ​ 5. The combination fire shutter linkage release device of claim 2, wherein, ​ 6. The combination fire shutter linkage release device of claim 2, wherein, ​ 7. The combination fire shutter linkage release device of claim 2, wherein, ​ 8. The combination fire shutter linkage release device of claim 2, wherein, ​ 9. The combination fire shutter linkage release device of any one of claims 1 to 8, wherein, ​

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