FIRE-DETECTING DEVICE

Abstract

A fire-detecting device has first and second stressed brackets plugged together. The far ends of the first and second stressed brackets both have a towing hole. A disintegrable temperature-sensing device is between the first and second stressed brackets. First and second fixing pins are in the first and second brackets, respectively. The first fixing pin is located on one side of a free-moving piece and the second fixing pin is located on the other side thereof. A guide groove is in the first stressed bracket to correspond to the second fixing pin. A guide recess is in the second stressed bracket. A stressed shaft is in the second stressed bracket. An extension part having a stressed groove is in the first stressed bracket. When the disintegrable temperature-sensing device cracks off due to high temperature, the two stressed brackets will separate, leading to the fire dampers' shutting.

Claims

1. A fire-detecting device, comprises a first stressed bracket and a second stressed bracket; the first stressed bracket and the second stressed bracket are plugged together, and far ends of the first stressed bracket and the second stressed bracket are both provided with a towing hole; a disintegrable temperature-sensing device is configured between the first stressed bracket and the second stressed bracket, and the first stressed bracket is equipped with holding components for holding an upper end of the disintegrable temperature-sensing device; a first fixing pin is configured in the first stressed bracket, while a second fixing pin is configured in the second stressed bracket; the first fixing pin and the second fixing pin are staggered each other, and a free-moving piece is arranged therebetween; the first fixing pin is located on one side of the free-moving piece, adjacent to the disintegrable temperature-sensing device, while the second fixing pin is located on the other side of the free-moving piece, and the first fixing pin is placed higher than the second fixing pin; the free-moving piece is equipped with a holding component for holding a lower end of the disintegrable temperature-sensing device; a guide groove is arranged in the first stressed bracket to correspond to the second fixing pin, while a guide recess is arranged in the second stressed bracket to correspond to the first fixing pin; a stressed shaft is configured in the second stressed bracket, close to the towing hole; an extension part is arranged in the first stressed bracket, to correspond to the stressed shaft, while a stressed groove is arranged in the extension part, to correspond to the stressed shaft.

2. The fire-detecting device according to claim 1, wherein the free-moving piece is L-shaped where a vertical portion thereof is designed as a curve, between the first fixing pin and the second fixing pin, while a horizontal portion thereof is equipped with a holding component to hold a lower end of the disintegrable temperature-sensing device.

3. The fire-detecting device according to claim 1, wherein an insertion hole for a fixing rod is provided in the laterals of the second stressed bracket.

4. The fire-detecting device according to claim 1, wherein a ventilation hole is provided in the laterals of the second stressed bracket, and a ventilation groove is provided in the first stressed bracket, to correspond to the ventilation hole.

5. The fire-detecting device according to claim 1, wherein a replacement opening is located at the bottom of the second stressed bracket to correspond to the holding component for holding a lower end of the disintegrable temperature-sensing device.

6. The fire-detecting device according to claim 1, wherein the holding component for holding a lower end of the disintegrable temperature-sensing device is a threaded fastening fitting.

7. The fire-detecting device according to claim 6, wherein threaded fastening lacquer is provided between the threaded fastening fitting and the free-moving piece.

8. The fire-detecting device according to claim 1, wherein the holding components for holding the upper end of the disintegrable temperature-sensing device comprise holding parts fastened on the top of the first stressed bracket and a glass bulb protective cover mounted to the holding parts.

9. The fire-detecting device according to claim 8, wherein the holding parts comprise a holding bracket and a holding hole configured above the holding bracket.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying figures hereinafter are provided to understand/explain this invention, together with the embodiment of the invention, and not a limitation to this invention.

[0020] FIG. 1 is an exploded structure schematic view of a fire-detecting device according to the invention;

[0021] FIG. 2 is a top view of a fire-detecting device according to the invention;

[0022] FIG. 3 is a sectional view along A-A line of FIG. 2;

[0023] FIG. 4 are serial schematic views that show the transformation process of the fire-detecting device after a temperature-sensing glass pillar cracks off;

[0024] FIGS. 5A-5C are serial schematic views that show the replacement steps of the temperature-sensing glass pillar.

REFERENCE LIST

[0025] 1first stressed bracket; [0026] 2second stressed bracket; [0027] 3towing hole; [0028] 4temperature-sensing glass bulb; [0029] 5glass bulb protective cover; [0030] 6first fixing pin; [0031] 7second fixing pin; [0032] 8free-moving piece; [0033] 9threaded fastening fitting; [0034] 10threaded fastening lacquer; [0035] 11replacement opening; [0036] 12guide groove; [0037] 13guide recess; [0038] 14stressed shaft; [0039] 15extension part; [0040] 16stressed groove; [0041] 17insertion hole for a fixing rod; [0042] 18ventilation hole; [0043] 19ventilation groove; [0044] 20holding parts; [0045] 21holding bracket; [0046] 22holding hole; [0047] 23fixing rod.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0048] Preferred embodiment of the present invention will be described in detail hereinafter with reference to the accompanying figures. However, it should be understood that the preferred embodiment herein is only described for explaining the present invention, and it is not a limitation to the invention.

[0049] As shown in FIGS. 1-4 and 5A-5C, a novelty fire-detecting device comprises a first stressed bracket (1) and a second stressed bracket (2). The first stressed bracket (1) and the second stressed bracket (2) are plugged together, and the far ends of the first stressed bracket (1) and the second stressed bracket (2) are both provided with a towing hole (3). A disintegrable temperature-sensing device, that is a temperature-sensing glass bulb (4) here, is configured between the first stressed bracket (1) and the second stressed bracket (2), and the first stressed bracket (1) is equipped with holding components, which contains a glass bulb protective cover (5), for holding an upper end of the disintegrable temperature-sensing device. A first fixing pin is configured in the first stressed bracket (1), and a second fixing pin (7) is configured in the second stressed bracket (2). The first fixing pin (6) and second fixing pin (7) are staggered each other, and a free-moving piece (8) is arranged therebetween, wherein the first fixing pin (6) is located on one side of the free-moving piece (8), adjacent to the disintegrable temperature-sensing device, while the second fixing pin (7) is located on the other side of the free-moving piece (8), and the first fixing pin (6) is placed higher than the second fixing pin (7). The free-moving piece (8) is equipped with a holding component, which is a threaded fastening fitting (9), for holding a lower end of the disintegrable temperature-sensing device, and threaded fastening lacquer (10) is provided between the threaded fastening fitting (9) and the free-moving piece (8). A replacement opening (11) is configured at the bottom of the second stressed bracket (2), to correspond to the threaded fastening fitting (9).

[0050] The threaded fastening fitting (9) can be adjusted according to different models of the temperature-sensing glass bulb (4), to adapt to a variety of lengths and origins of the temperature sensing glass bulb (4). The disintegrable temperature-sensing device is designed to have permanent mechanical resistance to elongation over 300 DaN by using appropriate metallic raw materials and thicknesses, and to limit the permanent force on the glass bulbs to the values given by their manufacturers.

[0051] A guide groove (12), which is arranged in the first stressed bracket (1), to correspond to the second fixing pin (7), plays a guiding role, and limits the displacement of the second fixing pin (7) as well. A guide recess (13), which is arranged in the second stressed bracket (2), to correspond to the first fixing pin (6) plays a guiding role, and limits the displacement of the first fixing pin (6) as well. A stressed shaft (14) is configured in the second stressed bracket (2), close to the towing hole (3). Corresponding to the stressed shaft (14), the first stressed bracket (1) is equipped with an extension part (15) having a stressed groove (16). The first fixing pin (6), the second fixing pin (7) and the stressed shaft (14) all adopt elastic cylindrical pin. The setting of the stressed shaft and the stressed groove makes firm engagement of the first force bracket (1) and the second force bracket (2).

[0052] The free-moving piece (8) is L-shaped where a vertical portion is designed as a curve, between the first fixing pin (6) and the second fixing pin (7). In case the first force bracket (1) and the second force bracket (2) suffer strong pulling force, such curved design of the free-moving piece (8) can reduce the strength of the pulling force to pull the two brackets apart. A horizontal portion of the L-shaped free-moving piece (8) is equipped with a holding component to hold a lower end of the disintegrable temperature-sensing device. By such design of this free moving part (8) and the space between the two fixing pins, the strength applied to the temperature-sensing glass bulb (4) will be decreased progressively, which results that the novelty fire-detecting device can withstand a very strong pulling force without damaging the glass bulb.

[0053] In the laterals of the second stressed bracket (2), there are an insertion hole (17) for a fixing rod and a ventilation hole (18). Meanwhile, in the first stressed bracket (1), there is a ventilation groove (19) to correspond to the ventilation hole (18). The novelty fire-detecting device is designed to have minimal thermal inertia, which is obtained by ventilation holes and small thickness components. The ventilation hole (18) and these small thickness components of the device make the bulb (4) more temperature sensitive.

[0054] The holding components for holding the upper end of the disintegrable temperature-sensing device comprise holding parts (20) fastened on the top of the first stressed bracket (1) and a glass bulb protective cover (5) mounted to the holding parts (20), wherein the holding parts (20) comprise a holding bracket (21) and a holding hole (22) configured above the holding bracket (21), and the glass bulb protective cover (5) covers the holding hole (22). The glass bulb protective cover (5) and the holding parts (20) can be assembled conveniently.

[0055] When the temperature-sensing glass bulb (4) cracks off, the novelty fire-detecting device will be unable to keep its assembled status, instead, each component of the device will be separated apart.

[0056] With reference to FIG. 4, after a temperature-sensing glass bulb (4) cracks off, the transformation of the fire-detecting device comprises the following processes.

[0057] 1. When the air temperature is lower than a predetermined temperature, the temperature-sensing glass bulb (4) is kept intact, and its upper end and lower end bear against the first stressed bracket (1) and the second stressed bracket (2) respectively while two opposite pulling forces are applied to the towing holes (3) in both first and second stressed brackets;

[0058] 2. When the air temperature is higher than the predetermined temperature, the temperature-sensing glass bulb (4) will crack off such that the force to bear against both first and second stressed brackets disappears. Under the two opposite pulling forces to the towing holes (3), the free-moving piece (8) are pulled to incline by the first fixing pin (6) of the first stressed bracket (1), then the first stressed bracket (1) and the second stressed bracket (2) are separated, and move oppositely.

[0059] 3. The first stressed bracket (1) and the second stressed bracket (2) keep moving oppositely, resulting that the first fixing pin (6) slides out from the guide recess (13) and the second fixing pin (7) slides out from the guide groove (12), then the first stressed bracket (1) and the second stressed bracket (2) are separated completely, the free-moving piece (8) falls down and does not impact any other parts.

[0060] With reference to FIGS. 5A-5C, the replacement of the temperature-sensing glass bulb (4) comprises the steps of

[0061] 1. Inserting a fixing rod (23) into the insertion hole (17) for securing the whole device;

[0062] 2. Opening the threaded fastening fitting (9) via a replacement opening (11), then replacing the temperature-sensing glass bulb (4), fastening the threaded fastening fitting (9), and coating the threaded fastening lacquer (10), finally removing the fixing rod (23).

[0063] Please appreciate that the embodiment described hereinbefore is merely preferred embodiment of the present invention and not for purposes of any restrictions or limitations on the invention. It will be apparent that any non-substantive, obvious alterations or improvement by the technician of this technical field according to the present invention may be incorporated into ambit of claims of the present invention.