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Grooved Joint¸¦ »ç¿ëÇÑ µµ·ÎÅͳΠ¼Òȹè°üÀÇ Groove¿¡ ÀÇÇÑ ¾Ð·Â¼Õ½Ç È¿°ú ºÐ¼® / Analysis of Pressure Loss Effect by Groove of Road Tunnel Fire Piping Using Grooved Joint |
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¼³ºñ°øÇÐ³í¹®Áý, Vol.36 No.09 (2024-09) |
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½ÃÀÛÆäÀÌÁö(466) ÃÑÆäÀÌÁö(8) |
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µî°¡±æÀÌ; ±×·çºê; ±×·çºêÁ¶ÀÎÆ®; ¾Ð·Â¼Õ½Ç; µµ·ÎÅͳΠ¼Òȹè°ü ; Equivalent length; Groove; Grooved joint; Pressure loss; Road tunnel fire piping |
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º» ¿¬±¸¿¡¼´Â ¼³°è ½Ç¹«Áýº°·Î »óÀÌÇÑ Groove joint Á¢ÇÕ¿¡¼ Groove¿¡ ÀÇÇÑ ¾Ð·Â¼Õ½ÇÀ» Á÷°æº°(100A~300A), À¯¼Óº°(1 m/s~4 m/s)·Î º¯È½ÃÅ°¸ç 3Â÷¿ø ¼öÄ¡Çؼ® ±â¹ýÀ» ÀÌ¿ëÇÏ¿© ¾òÀº °á°ú¸¦ Á¤·®ÀûÀ¸·Î ºñ±³?ºÐ¼®ÇØ º¸¾Ò´Ù. Á÷°ü¿¡ »ç¿ëµÈ Groove¿¡ ÀÇÇÑ Á÷°æº° µî°¡±æÀÌ´Â 0.209 m~0.381 m·Î ³ªÅ¸³µÀ¸¸ç ¿¤º¸, ƼÀÌ, ¹ëºê·ù µî°ú °°Àº °üºÎ¼ÓÇ°ÀÇ Á¢ÇÕÀ» À§ÇØ »ç¿ëµÇ´Â GrooveÀÇ °æ¿ì µÎ °¡Áö FittingÀÌ Á¸ÀçÇÒ ¶§ ¾Õ¼± Fitting¿¡ ÀÇÇØ µÎ ¹ø° Fitting¿¡ ÀÇÇÑ ¾Ð·Â¼Õ½ÇÀÌ °¨¼ÒÇϹǷΠGrooveÀÇ °æ¿ì À¯¹ßµÇ´Â ¾Ð·Â¼Õ½ÇÀº À̺¸´Ù ´õ ÀûÀ» °ÍÀ¸·Î ÆǴܵȴÙ.(7) À̸¦ ÅëÇØ ÀϹÝÀûÀÎ °ÇÃ๰ÀÇ ¹è°ü¼³ºñÀÇ °æ¿ì Grooved joint¿¡ ÀÇÇÑ ¾Ð·Â¼Õ½ÇÀº ¹«½ÃÇصµ ¹«¹æÇÒ °ÍÀ¸·Î »ý°¢µÇÁö¸¸, ÅͳΠ¼ÒÈ ¼³ºñ¿Í °°ÀÌ Á÷°üÀÇ Á¢ÇÕÀ» À§ÇÑ Grooved Joint°¡ ¸Å 6 m¸¶´Ù °è¼ÓÇؼ ¼³Ä¡µÉ °æ¿ì Á÷°ü¿¡ »ç¿ëµÇ´Â Grooved joint ¼ö·®ÀÌ ¸Å¿ì ¸¹¾ÆÁ® ¾Ð·Â¼Õ½Ç¿¡ ´ëÇÑ °í·Á°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î ÆǴܵȴÙ. °³·«ÀûÀÎ °è»ê ¹æ¹ýÀ¸·Î´Â Àüü Æò±Õ µî°¡±æÀÌÀÎ 0.292 m¡Ö0.3 m¸¦ 1º»´ç ±æÀÌÀÎ 6 m·Î ³ª´« 0.05¶ó´Â °è¼ö¸¦ ÀÌ¿ëÇÏ¿© Á÷°ü ¼Õ½Ç¿¡ 5%¿¡ ÇØ´çÇÏ´Â ¾Ð·Â¼Õ½ÇÀ» Ãß°¡·Î °í·ÁÇØ ÁÖ´Â ¹æ¹ýÀÌ ÀÖÀ¸¸ç Á¤¹ÐÇÒ °è»ê ¹æ¹ýÀ¸·Î´Â ¼Òȹè°ü ¾Ð·Â¼Õ½Ç °è»ê ½Ã Table 5¿¡ Á¦½ÃÇÑ ¹è°ü ±Ô°Ýº®, À¯¼Óº° Grooved jointÀÇ ¼ö·®À» ÀÏÀÏÀÌ »êÃâÇÏ¿© µî°¡±æÀ̸¦ °öÇÏ´Â °ÍÀÌ Á¤È®ÇÑ °è»ê ¹æ¹ýÀÌ´Ù. ¾Õ¼ ¾ð±ÞÇÑ ÅͳΠ¼ÒÈ ¼³ºñ »Ó¸¸ ¾Æ´Ï¶ó ¹è°ü °èÅëÀÇ ¾Ð·Â¼Õ½ÇÀ» Á¤¹ÐÇÏ°Ô °è»êÇØ¾ß Çϰųª °ø±Þ ¾Ð·ÂÀÌ ºÎÁ·ÇÒ ½Ã Å« ¹®Á¦¸¦ ¾ß±âÇÏ´Â ¼³ºñÀÇ °æ¿ì Groove¿¡ ÀÇÇÑ ¾Ð·Â¼Õ½ÇÀ» °í·ÁÇÏ¿© ÀüüÀûÀÎ °ø±Þ ¾Ð·ÂÀ» ³ô°Ô °è»êÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇÒ °ÍÀ¸·Î ÆǴܵȴÙ. Groove Çü»óÀº KS ±Ô°Ý¿¡¼ Á¦½ÃÇÏ´Â Ä¡¼ö·Î¼ °¢Áø ÇüÅ·Π¸ðµ¨¸µ ÇÏ¿´À¸³ª ¹è°ü ³» ½ÇÁ¦ GrooveÀÇ Çü»óÀº Á¦Á¶»ç¸¶´Ù ´Ù¸£¸ç Çü»óÀÌ °î¼±ÀÇ ÇüÅÂÀ̱⠶§¹®¿¡ °ü·ÃµÈ ¿¬±¸°¡ ÇÊ¿äÇÒ °ÍÀ¸·Î ¿¹»óµÈ´Ù. |
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Various methods exist for joining fire pipes. This study investigated the pressure loss caused by grooves in the pipe using the grooved joint bonding method. The groove size was very small, and the equivalent length presented by each design workbook was different, making it difficult to design. Particularly, fire extinguishing facilities in systems with many grooves compared to other facilities, such as tunnel fire extinguishing facilities, are expected to vary greatly. As the uneven part is fine, the actual measurement experiment is difficult, so it was analyzed using numerical analysis. A sudden change in pressure caused by the expansion and reduction of the groove and pressure loss caused by a recirculation vortex in the expansion part occurred. The grooved joint pressure loss equivalent length at 100A was 0.225 m, 125A was 0.333 m, 150A was 0.305 m, 200A was 0.285 m, 250A was 0.276 m, and 300A was 0.330 m, for an average equivalent length of 0.292 m. |