¸ß²ã½¨Öþ¸øÅÅË®±ÏÒµÉè¼Æ¼ÆËãÊé ÏÂÔر¾ÎÄ

ij»¨Ô°ÄÚ62~63ºÅÂ¥½¨Öþ¸øÅÅË®¡¢Ïû·ÀÉè¼Æ

Vf=Qx¡Á3¡Á3600/1000=464.4m3

ÓÉÓÚÔÚ»ðÔÖÑÓÐøʱ¼äÄÚÊÐÕþ¹ÜÍø¿É±£Ö¤Á¬Ðø½øË®£¬Ë®³Ø½øË®¹ÜÉèΪÁ½Ìõ£¬¹Ü¾¶ÎªDN80£¬¼ÆË㲹ˮÁ¿Ê±°´Ò»Ìõ¹¤×÷£¬¹ÜÄÚÁ÷ËÙÈ¡v=1.0m/s£¬Æ䲹ˮÁ¿Îª V=1.0¡Á3.14¡Á0.082/4¡Á3¡Á3600=54.3m3

ÔòÏû·ÀË®³ØÓÐЧÈÝ»ýΪ464.4¡ª54.3=410.1m3 10¡¢Ïû·ÀË®Ï䣺

Ïû·ÀË®ÏäÖüË®ÈÝ»ý°´´æÖü10minµÄÊÒÄÚÏû·ÀÓÃË®Á¿¼ÆËã Vf=0.6Qx=0.6¡Á43=25.8m3

ʽÖÐQx¡ªÊÒÄÚÏû»ð˨ÓÃË®Á¿£¬È¡Qx=43L/S

Ϊ±ÜÃâË®ÏäÈÝ»ý¹ý´ó£¬µ±ÊÒÄÚÏû·ÀÓÃË®Á¿Ð¡ÓÚµÈÓÚ25L/S£¬¾­¼ÆËãÏû·ÀË®Ïä´óÓÚ12m3ʱ£¬ÈԿɲÉÓÃ12m3£¬µ±ÊÒÄÚÏû·ÀÓÃË®Á¿´óÓÚ25L/S£¬¾­¼ÆËãÏû·ÀË®Ïä´óÓÚ18m3ʱ£¬ÈԿɲÉÓÃ18m3,ËùÒÔÏû·ÀË®ÏäµÄÈÝ»ýÈ¡18m3,Ïû·ÀË®Ïä³ß´çΪ3.5m¡Á3m¡Á2.1m,ÓÐЧˮÉîΪ1.8m,ÓÐЧÈÝ»ýΪ18.9m3¡£

×Ô¶¯ÅçË®Ãð»ðϵͳ

1¡¢Éè¼Æ²ÎÊýµÄÑ¡Ôñ£º

½¨ÖþÎï°´ÖÐΣÏÕ¢ñ¼¶Éè¼Æ£¬Ñ¡Óñê×¼ÅçÍ·£¬ÆäÁ÷Á¿ÌØÐÔϵÊýKΪ80£¬ÅçÍ·´¦Ñ¹Á¦Îª0.1 Mpa£¬Éè¼ÆÅçˮǿ¶ÈΪ6 L/(min?m2)£¬×÷ÓÃÃæ»ýΪ160 m2£¬ÐÎ×´²¼ÖòÉÓó¤·½ÐΡ£³¤±ßL=1.2F=1.2?160=15.18m£¬È¡17m£¬¶Ì±ßΪ8.4m£¬×÷ÓÃÃæ»ýÄÚÅçÍ·Êý¹²15¸ö£¬²¼ÖÃÐÎʽÈçͼËùʾ£¬°´×÷ÓÃÃæ»ý·¨½øÐйܵÀË®Á¦¼ÆËã¡£

×Ô¶¯ÅçË®Ãð»ðϵͳ»ù±¾Éè¼Æ²Î

Êý »ðÔÖΣÏյȼ¶ ÖÐΣÏÕ¼¶¢ñ¼¶ Åçˮǿ¶È/[L/(min?m2)] 6 ×÷ÓÃÃæ»ý/m2 160 ÅçÍ·¹¤×÷ѹÁ¦/MPa 0.1 ³ÖÐøÅçˮʱ¼ä/h 1.0 2¡¢Ã¿¸öÅçÍ·µÄÅçË®Á¿Îª£ºq=K10P=80?1=80L/min=1.33L/S 3¡¢×÷ÓÃÃæ»ýÄÚµÄÉè¼ÆÃëÁ÷Á¿Îª£ºQs=nq=15?1.33=19.95L/S 4¡¢ÀíÂÛÃëÁ÷Á¿Îª£º

F?qQ1==17?8.4?6/60=14.28L/S

60

±È½ÏQsÓëQ1£¬Éè¼ÆÃëÁ÷Á¿QsΪÀíÂÛÉè¼ÆÃëÁ÷Á¿Q1µÄ1.4±¶£¬·ûºÏÒªÇó¡£ 5¡¢×÷ÓÃÃæ»ýÄڵļÆËãƽ¾ùÅçˮǿ¶ÈΪ£º

qp=15?80/142.8=8.4/(min?m2) ´ËÖµ´óÓڹ涨ҪÇó6 L/(min?m2)¡£ 6¡¢ÅçÍ·µÄ±£»¤°ë¾¶£º

R¡Ý£¨3.42+2.82£©0.5/2=2.2m£¬È¡R=2.2m

21

ij»¨Ô°ÄÚ62~63ºÅÂ¥½¨Öþ¸øÅÅË®¡¢Ïû·ÀÉè¼Æ

7¡¢×÷ÓÃÃæ»ýÄÚ×î²»Àûµã´¦4¸öÅçÍ·Ëù×é³ÉµÄ±£»¤Ãæ»ý£º

F4=(1.4+2.8+1.4) ?(1.7+3.4+1.7)=38.08m2

ÿ¸öÅçÍ·µÄ±£»¤Ãæ»ýΪ£ºF1= F4/4=9.52m2

Æäƽ¾ùÅçˮǿ¶ÈΪ£ºq=80/9.52=8. 4 L/(min?m2)>6.0 L/(min?m2)

8¡¢Ë®Á¦¼ÆË㣺

ÅçÁܼÆËã²Ýͼ ×Ô¶¯ÅçÁÜϵͳ¼ÆËã±í ¹Ü¶Î±àºÅ ¹Ü¶ÎÁ÷Á¿£¨L/S£© 1~2 2~3 3~4 4~5 5~6 6~7 7~8 8~9 9~10 1.33 2.66 3.99 5.32 6.65 6.65 7.00 13.30 19.95 ¹Ü¾¶ mm 25 32 50 50 70 70 70 100 100 Á÷ËÙ m/s 2.54 2.85 1.84 2.54 1.90 1.90 1.99 1.56 2.31 µ¥×èi ¹Ü³¤ £¨KPa/m£© m 7.96 6.84 1.69 3.23 1.30 1.30 1.42 0.49 1.07 3.4 3.4 3.4 3.4 3.4 1.7 2.8 2.8 2.8 ÑسÌˮͷËðʧ iL£¨KPa£© 27.064 23.256 5.746 10.982 4.42 2.21 3.98 1.37 3.00 10~11 19.95 100 2.31 1.07 1.8 3.00 ÅçÁÜ×î²»Àû¹Ü·Ϊ1~2~3~4~5~6~7~8~9~10~11£¬ËùÒÔÅçÁܵÄ×î²»Àû¹Ü·ÑسÌѹÁ¦Ëðʧ×ܺÍΪ£º

27.064+23.256+5.746+10.982+4.42+2.21+3.98+1.37+6=85.028KPa Ôò¹Ü¶ÎµÄ×ÜËðʧΪ

?h=1.2?85.028=102.03KPa 9 ϵͳËùÐèˮѹ

H= ?h+P0+Z

ʽÖÐ H¡ªÏµÍ³ËùÐèˮѹ»òË®±ÃÑï³Ì£¬MPa ?h¡ª¹ÜµÀµÄ×ÜËðʧ£¬MPa

P0¡ª×î²»Àûµã´¦ÅçÍ·µÄ¹¤×÷ѹÁ¦£¬MPa

Z¡ª×î²»Àûµã´¦ÅçÍ·ÓëÏû·ÀË®³ØµÄ×îµÍˮλ»òϵͳÈë¿Ú¹ÜˮƽÖÐÐÄÏßÖ®¼äµÄ¸ß³Ì²î£¬MPa

ʪʽ±¨¾¯·§ºÍË®Á÷ָʾÆ÷µÄ¾Ö²¿Ë®Í·Ëðʧȡ20KPa£¬¸øË®¹ÜÖÐÐÄÏß±ê¸ßÒÔ¡ª2.0m¼Æ£¬ËùÒÔϵͳËùÐèˮѹΪ£º H=102.03+100+20=222.03KPa

22

ij»¨Ô°ÄÚ62~63ºÅÂ¥½¨Öþ¸øÅÅË®¡¢Ïû·ÀÉè¼Æ

1¡¢ÅÅˮϵͳÉèÖãº

ÅÅˮϵͳ²ÉÓúÏÁ÷ÖÆ¡£2¡«21²ã¹²ÉèÅÅË®Á¢¹Ü21¸ù£¬Ã¿¸ùÁ¢¹Üµ¥¶ÀÅÅÈëÊÒÍâ¼ì²é¾®ÄÚ¡£

2¡¢¼ÆË㹫ʽ¼°²ÎÊý£º

ÅÅË®Éè¼ÆÃëÁ÷Á¿°´¹«Ê½qp=0.12¦ÁNp+qmax¼ÆË㣬ÆäÖЦÁÈ¡1.5£¬qmaxΪ¼ÆËã¹Ü¶ÎÉÏ×î´óµÄÒ»¸öÎÀÉúÆ÷¾ßµÄÅÅË®Á÷Á¿¡£

ÎÀÉúÆ÷¾ßµÄÅÅË®Á÷Á¿¡¢µ±Á¿ºÍÖ§¹Ü¹Ü¾¶ ÎÀÉúÆ÷¾ßÃû³Æ ÁÜÔ¡Æ÷ Ï´Á³Åè Ô¡Åè Ï´µÓÅè ÅÅË®Á÷Á¿£¨L/S£© ÅÅË®µ±Á¿ 4.5 0.45 0.75 3.0 1.0 0.15 0.25 1.0 0.33 Ö§¹Ü¹Ü¾¶£¨mm£© 100 50 50 50 50 ×ø±ãÆ÷£¨³åÏ´Ë®Ï䣩 1.5 ÅÅˮϵͳˮÁ¦¼ÆËã

3¡¢ÅÅË®ºáÖ§¹ÜË®Á¦¼ÆË㣺

ÅÅË®ºáÖ§¹ÜÈçÖ»Á¬½ÓÒ»¸öÎÀÉúÆ÷¾ß£¬Ö§¹Ü¹Ü¾¶°´±íÈ·¶¨£¬Æ¶Ⱦù²ÉÓñê׼ƶȡ£ Á¢¹ÜWL2£¬3£¬7£¬8£¬13£¬14£¬19£¬20¶¼ÊÇÖ»Á¬½ÓÒ»¸öÏ´µÓÅ裬ËùÒÔÏàÓ¦µÄºáÖ§¹Ü¹Ü¾¶È¡DN=50mm,ƶÈi=0.035¡£

ÎÀÉúÆ÷¾ß»ãºÏºóºáÖ§¹Ü¹Ü¶ÎÅÅË®Éè¼ÆÃëÁ÷Á¿°´ÏÂÁз½·¨¼ÆË㣬²é±í¼ÆËã¸÷ºáÖ§¹Ü¹Ü¾¶Óëƶȣ¬½á¹û¼û±í¡£

23

ij»¨Ô°ÄÚ62~63ºÅÂ¥½¨Öþ¸øÅÅË®¡¢Ïû·ÀÉè¼Æ

ÅÅË®ºáÖ§¹ÜË®Á¦¼ÆËã±í ¼ÆËãͼ ÎÀÉú½à¾ßµ±Á¿Êý µ±Á¿¹Ü¶Î×ÜÊý Ï´Á³Åè Ô¡Åè ×ø±ãÁÜÔ¡Æ÷ ±àºÅ Np=0.75 Np=3 Æ÷ Np=0.4Np=4.5 5 1~3 3~4 4~5 ͼ2 1~3 3~4 4~5 0 0 1 0 0 1 0 0 0 1 1 1 0 1 1 0 1 1 1 1 1 0 0 0 0.45 4.95 5.70 3.00 7.50 8.25 Éè¼ÆÃëÁ÷Á¿ qp L/S 1.65 1.90 1.00 2.00 2.01 ¹«³ÆÆÂ¶È ¹Ü¾¶ i mm mm/m ͼ1 100 100 50 100 100 0.02 0.02 0.035 0.02 0.02 ÅÅË®Á¢¹ÜWL¡ª6£¬12£¬18£¬21ÓëÅÅË®Á¢¹ÜWL¡ª1Ïàͬ£¬ËùÒÔ¼ÆËã½á¹û¼û±í¡£

ÅÅË®Á¢¹ÜWL¡ª4£¬5£¬10£¬11£¬15£¬16£¬17ÓëÅÅË®Á¢¹ÜWL¡ª9Ïàͬ£¬ËùÒÔ¼ÆËã½á¹û¼û±í¡£

4¡¢ÅÅË®Á¢¹ÜË®Á¦¼ÆË㣺

£¨1£©ÅÅË®Á¢¹ÜË®Á¦¼ÆËãÒÔÅÅË®Á¢¹ÜWL¡ª2£¨Ö»Á¬½ÓÒ»¸öÏ´µÓÅ裩ΪÀý£¬ÅÅË®Á¢¹Ü×îϲ¿¹Ü¶ÎµÄÅÅË®Éè¼ÆÃëÁ÷Á¿Îª

qp=0.18¡ÁNp+qmax=0.18¡Á£¨20¡Á1£©0.5+0.33=1.13L/S ²é±íµÃÁ¢¹Ü¹Ü¾¶Îª75mm£¬ÒòÉè¼ÆÃëÁ÷Á¿1.13L/SСÓÚ±íÖÐDN75mmÅÅË®ËÜÁϹÜ×î´óÔÊÐíÅÅË®Á÷Á¿1.7L/S£¬ËùÒÔ²»ÐèÉèרÓÃͨÆø¹Ü¡£ÆäÓàÏàͬÁ¢¹Ü¼ÆËãͬÉÏ¡£ £¨2£©ÅÅË®Á¢¹ÜË®Á¦¼ÆËãÒÔÅÅË®Á¢¹ÜWL¡ª1ΪÀý£¬ÅÅË®Á¢¹Ü×îϲ¿¹Ü¶ÎµÄÅÅË®Éè

24