SPRINKLER ALLOY FUSE

Abstract

A sprinkler head alloy fuse of the present invention enables, when a fire occurs, firefighting water that is in an always-pressed state to be strongly discharged and be reflected to a water reflection plate such that the fire can be rapidly and automatically suppressed, wherein the alloy fuse eccentrically couples a first lever and a second lever, is inserted into a heating tube, and is welded by a fusible low-temperature alloy. When a fire occurs and the ambient temperature reaches a sprinkler operation temperature, heat temperature transferred to the heating tube rapidly fuses the fusible low-temperature alloy, the heating tube is separated from a welded part by means of the elasticity of a spring mounted in a second lever groove, the central balance of the eccentrically coupled levers is broken, a nozzle plug is opened, and thus, a sprinkler head is operated. The alloy fuse of the present invention reduces high operation temperature deviation as in a glass fuse, precisely operates, maintains strong impact resistance, enables automatic production of a sprinkler head, and reduces manufacturing cost.

Claims

1. A alloy fuse for a sprinkler head including a nozzle, a frame connected to a water supply pipe to enable pressurized fire-fighting water to be discharged strongly through the nozzle, a nut provided to a lower portion of the frame, a bolt of a height adjustment means coupled to the nut, and a water deflector coupled to a center of a lower end of the frame, the alloy fuse comprising: a heating tube and first and second levers, the heating tube and the first and second levers being supported by the height adjustment means of the bolt welded with a fusible metal, wherein, when a fire breaks out and an ambient temperature reaches an operating temperature of the sprinkler head: the fusible metal is melted; the heating tube is immediately moved to a lower end by elasticity of a spring mounted on the second lever; and the eccentrically coupled first and second levers are separated and operated.

2. The alloy fuse of claim 1, further comprising: a compression spring mounted in a central groove formed in a flat surface of the second lever, wherein, when the fusible metal is melted, the heating tube is quickly separated and moved to the lower end by elasticity of the spring, wherein opposite wings of the spring are coupled to an upper portion of the heating tube, and wherein one side of the spring is folded up to allow visual confirmation of mounting of the spring after welding.

3. The alloy fuse of claim 1, wherein a central axis of the first lever and a central axis of the second lever are eccentrically coupled such that welded parts of the levers separated and operated when the levers are subjected to load pressure, wherein the heating tube is welded to maintain a pressure load to safely support the load pressure, wherein the welded parts of the first and second levers are provided with bumps and recesses to increase a welding strength of the heating tube and minimize loss of heat transferred to the heating tube such that the fusible metal is quickly melted.

4. The alloy fuse of claim 1 or 2, wherein a rim of an upper part of the heating tube is bent and extended to maintain a predetermined height so as to be welded with the fusible metal, wherein a bent surface of the rim is bent wide to allow the molten fusible metal and the opposite wings of the spring to be seated thereon at the predetermined height and welded with the welded parts of the levers, wherein the alloy fuse operates as a standard response fuse or an early-response fuse depending on a length of the heating tube.

Description

DESCRIPTION OF DRAWINGS

[0068] FIG. 1 is a cross-sectional view of a sprinkler head according to the prior art.

[0069] FIG. 2 is a cross-sectional view of coupling of a sprinkler head and an alloy fuse according to an embodiment of the present disclosure.

[0070] FIG. 3 is a three-dimensional view of a first lever according to an embodiment of the present disclosure.

[0071] FIG. 4 is a three-dimensional view of a second lever according to an embodiment of the present disclosure.

[0072] FIG. 5 is a three-dimensional view of a heating tube according to an embodiment of the present disclosure.

[0073] FIG. 6 is a cross-sectional view of a compression spring according to an embodiment of the present disclosure.

[0074] FIG. 7 is a cross-sectional view of an alloy fuse assembly according to an embodiment of the present disclosure.

[0075] FIG. 8 is a three-dimensional view of a fusible metal according to an embodiment of the present disclosure.

[0076] FIG. 9 is a cross-sectional view of an operation according to an embodiment of the present disclosure.

BEST MODE

[0077] Hereinafter, a detailed description will be made with reference to with reference to the accompanying drawings.

[0078] Terms or words used in this specification should not be construed as limited to ordinary meanings or dictionary definitions.

[0079] Rather, they should be construed based on the principle that the inventor can appropriately define the concept of terms in order to explain the contents of the disclosure in the best way.

[0080] The configuration shown in the drawings is the most preferred embodiment of the present disclosure.

[0081] It does not represent all the technical ideas of the present disclosure.

[0082] Accordingly, similar modifications may be made at the time of filing of the present application.

[0083] FIG. 2 is a cross-sectional view of a sprinkler head according to an embodiment of the present disclosure.

[0084] The figure illustrates the sprinkler head installed in a general building.

[0085] The sprinkler head according to the embodiment of the present disclosure includes:

[0086] a frame 70, a deflector 60, a fuse 50, and a nozzle cap 40.

[0087] It is coupled to a pipe 100.

[0088] Thus, pressurized fire-fighting water may be discharged through the nozzle 35 configured in the frame 70.

[0089] The deflector 60 is coupled to a lower end of the frame 70 for the purpose of spraying the pressurized fire-fighting water onto a large area.

[0090] Also, a bolt 30 is coupled to a lower end nut 20 of the frame 70 to adjust the height of the alloy fuse 50.

[0091] The bolt 30 is fastened to the nut 20 of the frame 70.

[0092] The lower end of the alloy fuse 50 is coupled to the bolt.

[0093] The upper round triangular horn 55 is coupled to a central groove 45 of the nozzle cap 40 to which the plate washer 57 is coupled.

[0094] When the height is adjusted with the bolt 30 fastened to the nut 20, the alloy fuse 50 is raised.

[0095] Then, the plate washer 57 coupled to the nozzle cap 40 may strongly close the nozzle inlet.

[0096] The sprinkler head assembled in this order may be installed in the pipe 100.

[0097] Thus, the sprinkler head is enabled to discharge pressurized fire-fighting water in an emergency.

[0098] FIG. 3 is a three-dimensional view of a first lever 90 of the alloy fuse according to an embodiment of the present disclosure.

[0099] FIG. 4 is a three-dimensional view of a second lever 80 of the alloy fuse of the present disclosure.

[0100] A groove 82 is in a flat surface of the second lever 80 such that a spring 75 may be installed therein.

[0101] The alloy fuse 50 includes the first lever 90 and the second lever 80.

[0102] The joint part where the first lever and the second lever are coupled is inserted into the heating tube 10 and welded with a fusible metal 15.

[0103] The first lever 90 is formed by processing an upper cross section 95 in a rectangular shape.

[0104] The joint part coupled to the second lever is planar-machined (92), and combined with the planar-machined surface 82 of the second lever 80.

[0105] The bent part of the second lever is coupled to the upper rectangle 95 of the first lever.

[0106] Thus, the central axis of the first lever and the central axis of the second lever are eccentrically combined.

[0107] When the coupled bent part is inserted into the heating tube 10 and welded with the fusible metal 15, an alloy fuse that safely supports the assembly load of the sprinkler head is completed.

[0108] The first lever and the second lever are welded in the heating tube 10 of a metal material.

[0109] Accordingly, even when a strong instantaneous impact load pressure is generated in the sprinkler due to the waterhammer effect, the levers are not separated or displaced.

[0110] As the heating tube 10 is not separated from the welded part, malfunction of the sprinkler head may not occur.

[0111] The welded parts of the first and second levers coupled to the heating tube 10 of FIG. 5 include a concavo-convex groove 89.

[0112] Thus, welding strength of the fusible metal 15 may be increased, and loss of heat transferred to the heating tube 10 may be reduced as much as possible.

[0113] Thus, heat may be directly transferred to the fusible metal 15 to quickly melt the fusible metal.

[0114] Thereby, the alloy fuse may function as an early-response fuse.

[0115] FIG. 6 is a cross-sectional view of the compression spring 75.

[0116] In the process of welding the heating tube 10 and the first and second levers together,

[0117] both wings of the compression spring 75 mounted in the groove 82 of the second lever are raised and seated on a bent part 12 at an upper end of the heating tube 10 with elasticity maintained.

[0118] Then, they are welded with the fusible metal 15.

[0119] FIG. 7 is a partial plan view showing the alloy fuse of the present disclosure mounted in a sprinkler head.

[0120] FIG. 8 is a three-dimensional view of the fusible metal. The fusible metal 15 is a type of lead that melts at a low temperature.

[0121] It melts at a lower temperature than the temperature (about 327° C.) at which normal lead is melted.

[0122] The fusible metal responses very accurately with a small deviation of temperature, compared to a glass fuse, which has a large deviation in operating temperature.

[0123] According to another embodiment of the present disclosure, the fusible metal 15 may include:

[0124] general lead, a fusible alloy, solder, or a mixture of lead and a metal such as thallium (TI), polonium (Po), bismuth (Bi), or the like having a melting point lower than that of lead.

[0125] FIG. 9 illustrates the operation according to the present disclosure.

[0126] When a fire breaks out, the ambient temperature reaches the operating temperature of the sprinkler head, and the fusible metal 15 is melted.

[0127] The heating tube 10 is separated to the lower end by the elastic force of the compression spring 75 seated on the upper bent part 12 of the heating tube 10.

[0128] Also, the welded parts of the levers 1 and 2 eccentrically coupled to each other are separated to open the nozzle cap 40 that closes the inlet of the nozzle 35.

[0129] Then, the constantly pressurized fire-fighting water may be discharged and deflected on the deflector 60 to be sprayed on a large area.

[0130] Thereby, the sprinkler head may quickly extinguish the initial fire.

[0131] The alloy fuse of the sprinkler head according to the present disclosure is an alloy fuse 50 assembled in an integrated structure as follows.

[0132] The first lever 90 and the second lever 80 are eccentrically coupled and welded in the cylindrical heating tube 10 with the fusible metal 15.

[0133] Thus, the alloy fuse may be operated by elastic repulsive force of the compression spring 75.

[0134] The welding strength of the heating tube 10 is increased by forming bumps and recesses in the welded parts of the first and second levers.

[0135] Thus, when a fire breaks out, the fusible metal is quickly melted at the temperature of heat transferred to the heating tube 10.

[0136] Thereby, the sprinkler head is operated.

[0137] As described above, the technical ideas described in the present disclosure may be independently implemented.

[0138] Alternatively, they may be implemented in combination with each other.

[0139] This disclosure is not limited thereto.

[0140] Changes or modifications may be made to the present invention with reference to the invention by those of ordinary skill in the art.

MODE FOR INVENTION

[0141] The sprinkler head according to the conventional technology for the fire extinguishing sprinkler is generally composed of:

[0142] a frame, a fuse, a nozzle cap, and a water deflector.

[0143] The frame is connected to a water supply pipe for supplying fire-fighting water.

[0144] The deflector is coupled to the lower end of the frame such that pressurized fire-fighting water may be radiated from the nozzle onto a large area.

[0145] The shaft of the alloy fuse may be coupled to the nozzle with a strong force.

[0146] Also, the assembly pressure of the bolt may be adjusted.

[0147] The alloy fuse according to the present functions as a sprinkler fuse to be operated sensitively.

[0148] Compared to the glass fuse, the alloy fuse of the sprinkler head according to the present disclosure may exhibit a very small deviation in operating temperature.

[0149] In addition, it may operate without an error.

INDUSTRIAL APPLICABILITY

[0150] Large buildings and high-rise buildings in large cities can be very vulnerable to fires.

[0151] Large fires are often accompanied by huge property losses and human casualties.

[0152] For fire extinguishing facilities that can prevent large fires, installing a sprinkler head from may be most effective and is inexpensive.

[0153] Further, the sprinkler head may quickly and automatically suppress initial fires, thereby preventing initial fires from growing to large fires.

[0154] The alloy fuse according to the present functions as a sprinkler fuse to be operated sensitively.

[0155] Compared to the glass fuse, the alloy fuse of the sprinkler head according to the present disclosure may exhibit a very small deviation in operating temperature.

[0156] In addition, it may operate without an error.

TABLE-US-00001 List of reference numerals 200: Sprinkler head 100: Pipe 40: Nozzle cap 20: Nut 30: Bolt 55: Round triangular horn 45: Central groove 35: Nozzle 70: Frame 60: Deflector 75: Compression spring 90: First lever 80: Second lever 10: Heating tube 15: Fusible metal 95: Upper cross section 82: Second lever groove 92: First lever planar machining 89: Concavo-convex groove 12: Heating tube bent surface 50: Alloy fuse 57: Plate washer