{"id":2110,"date":"2025-03-01T10:24:39","date_gmt":"2025-03-01T02:24:39","guid":{"rendered":"https:\/\/led.amasly.com\/?p=2110"},"modified":"2025-12-27T20:27:32","modified_gmt":"2025-12-27T12:27:32","slug":"some-knowledge-about-explosion-proof-fans","status":"publish","type":"post","link":"https:\/\/led.amasly.com\/vi\/explosion-proof-equipment\/some-knowledge-about-explosion-proof-fans\/","title":{"rendered":"Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5: L\u1ef1a ch\u1ecdn, \u1ee8ng d\u1ee5ng & Ti\u00eau chu\u1ea9n an to\u00e0n"},"content":{"rendered":"

H\u01b0\u1edbng d\u1eabn v\u1ec1 qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5: L\u1ef1a ch\u1ecdn, \u1ee8ng d\u1ee5ng v\u00e0 Ti\u00eau chu\u1ea9n an to\u00e0n<\/strong><\/h1>\n\n\n\n

Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong>s<\/h2>\n\n\n\n

Khi qu\u1ea1t v\u1eadn chuy\u1ec3n c\u00e1c kh\u00ed v\u00e0 b\u1ee5i d\u1ec5 ch\u00e1y v\u00e0 n\u1ed5, t\u0129nh \u0111i\u1ec7n v\u00e0 tia l\u1eeda l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 c\u1ef1c k\u1ef3 nguy hi\u1ec3m, c\u00f3 th\u1ec3 g\u00e2y ra c\u00e1c v\u1ee5 n\u1ed5 v\u00e0 c\u00e1c tai n\u1ea1n an to\u00e0n kh\u00e1c n\u1ebfu kh\u00f4ng \u00e1p d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p x\u1eed l\u00fd \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

1. C\u00e1ch x\u00e1c nh\u1eadn qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5?<\/strong><\/h2>\n\n\n\n

\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c li\u1ec7u qu\u1ea1t c\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5 hay kh\u00f4ng, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 th\u00f4ng qua c\u00e1c ph\u01b0\u01a1ng ph\u00e1p sau: \u0111\u1ea7u ti\u00ean, ki\u1ec3m tra xem v\u1ecf qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 ho\u1eb7c h\u1ed9p \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n c\u00f3 D\u1ea5u hi\u1ec7u ch\u1ed1ng ch\u00e1y n\u1ed5.<\/strong> Bi\u1ec3u t\u01b0\u1ee3ng n\u00e0y bao g\u1ed3m c\u00e1c chi ti\u1ebft v\u1ec1 l\u1edbp ch\u1ed1ng ch\u00e1y n\u1ed5, lo\u1ea1i kh\u00ed ho\u1eb7c b\u1ee5i m\u00e0 n\u00f3 \u00e1p d\u1ee5ng, lo\u1ea1i bi\u1ec7n ph\u00e1p ch\u1ed1ng ch\u00e1y n\u1ed5, v.v. T\u1ea1i Trung Qu\u1ed1c, c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1edfi AQSIQ. T\u1ea1i Trung Qu\u1ed1c, c\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u00e0 ban h\u00e0nh b\u1edfi AQSIQ.
     Th\u1ee9 hai, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c ti\u00eau chu\u1ea9n b\u1ea3o v\u1ec7 ch\u1ed1ng n\u1ed5 l\u00e0 r\u1ea5t quan tr\u1ecdng. Th\u00f4ng th\u01b0\u1eddng, c\u00e1c ti\u00eau chu\u1ea9n ch\u1ed1ng n\u1ed5 \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n qua hai ti\u00eau chu\u1ea9n ch\u00ednh l\u00e0 IP v\u00e0 EX. Ti\u00eau chu\u1ea9n IP ch\u1ee7 y\u1ebfu li\u00ean quan \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7, trong khi ti\u00eau chu\u1ea9n EX d\u00e0nh ri\u00eang cho thi\u1ebft b\u1ecb ch\u1ed1ng n\u1ed5. Trong ti\u00eau chu\u1ea9n EX, hai ch\u1eef s\u1ed1 ti\u1ebfp theo \u0111\u1ea1i di\u1ec7n cho m\u1ee9c \u0111\u1ed9 ch\u1ed1ng n\u1ed5, v\u00ed d\u1ee5, trong EXdIICT6, \u201cd\u201d \u0111\u1ea1i di\u1ec7n cho v\u1ecf ch\u1ed1ng n\u1ed5, \u201cII\u201d \u0111\u1ea1i di\u1ec7n cho lo\u1ea1i kh\u00ed ho\u1eb7c b\u1ee5i \u00e1p d\u1ee5ng, \u201cCT6\u201d \u0111\u1ea1i di\u1ec7n cho gi\u1edbi h\u1ea1n t\u0103ng nhi\u1ec7t \u0111\u1ed9. \u201cCT6\u201d ch\u1ec9 ra gi\u1edbi h\u1ea1n t\u0103ng nhi\u1ec7t \u0111\u1ed9.
    H\u01a1n n\u1eefa, vi\u1ec7c nh\u1eadn bi\u1ebft d\u1ea5u hi\u1ec7u ch\u1ed1ng ch\u00e1y n\u1ed5 c\u1ee7a qu\u1ea1t v\u00e0 ch\u1ee9ng nh\u1eadn t\u01b0\u01a1ng \u1ee9ng l\u00e0 r\u1ea5t quan tr\u1ecdng. D\u1ea5u hi\u1ec7u ch\u1ed1ng ch\u00e1y n\u1ed5 th\u01b0\u1eddng \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i: Ex v\u00e0 D. D\u1ea5u hi\u1ec7u Ex l\u00e0 d\u1ea5u hi\u1ec7u ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u1ed5 bi\u1ebfn \u1edf ch\u00e2u \u00c2u v\u00e0 qu\u1ed1c t\u1ebf, trong khi d\u1ea5u hi\u1ec7u D l\u00e0 \u0111\u1eb7c th\u00f9 c\u1ee7a \u0110\u1ee9c. Ngo\u00e0i ra, qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 c\u0169ng c\u1ea7n ph\u1ea3i \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn ch\u1ed1ng ch\u00e1y n\u1ed5 t\u01b0\u01a1ng \u1ee9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 ch\u1ee9ng nh\u1eadn ATEX c\u1ee7a Li\u00ean minh Ch\u00e2u \u00c2u v\u00e0 ch\u1ee9ng nh\u1eadn CCC c\u1ee7a Trung Qu\u1ed1c.
     \u0110\u1ed3ng th\u1eddi, vi\u1ec7c hi\u1ec3u r\u00f5 m\u00f4i tr\u01b0\u1eddng v\u00e0 y\u00eau c\u1ea7u \u1ee9ng d\u1ee5ng c\u1ee7a qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 r\u1ea5t quan tr\u1ecdng. Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng d\u1ec5 ch\u00e1y n\u1ed5, nh\u01b0 nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t, nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u, m\u1ecf than v\u00e0 c\u00e1c m\u00f4i tr\u01b0\u1eddng t\u01b0\u01a1ng t\u1ef1. Khi l\u1ef1a ch\u1ecdn qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5, c\u1ea7n ph\u1ea3i hi\u1ec3u r\u00f5 c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng chi ti\u1ebft, bao g\u1ed3m c\u1ea5p \u0111\u1ed9 c\u1ee7a kh\u00ed, ch\u1ea5t l\u1ecfng, b\u1ee5i, v.v., nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 \u1ea9m v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c.
     Cu\u1ed1i c\u00f9ng, c\u1ea7n x\u00e1c \u0111\u1ecbnh c\u1ea5p \u0111\u1ed9 ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u00f9 h\u1ee3p (v\u00ed d\u1ee5: Exd, Exe) c\u0169ng nh\u01b0 c\u1ea5p \u0111\u1ed9 b\u1ea3o v\u1ec7 (v\u00ed d\u1ee5: IP54, IP65) d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng c\u1ee5 th\u1ec3 v\u00e0 y\u00eau c\u1ea7u ho\u1ea1t \u0111\u1ed9ng. Ngo\u00e0i ra, c\u1ea7n xem x\u00e9t v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho qu\u1ea1t, ch\u1eb3ng h\u1ea1n nh\u01b0 h\u1ee3p kim nh\u00f4m, th\u00e9p kh\u00f4ng g\u1ec9, v.v., c\u0169ng nh\u01b0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y.<\/p>\n\n\n\n

2 Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 cho nh\u1eefng n\u01a1i n\u00e0o?<\/strong><\/h2>\n\n\n\n

Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u khu v\u1ef1c c\u00f4ng nghi\u1ec7p n\u01a1i c\u1ea7n ng\u0103n ng\u1eeba c\u00e1c v\u1ee5 n\u1ed5 do tia l\u1eeda ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 cao g\u00e2y ra. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn c\u1ee7a qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5:<\/p>\n\n\n\n

Nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t: Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t c\u00f3 nhi\u1ec1u ch\u1ea5t d\u1ec5 ch\u00e1y v\u00e0 d\u1ec5 n\u1ed5. Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u00f4ng sinh ra tia l\u1eeda ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 cao khi x\u1eed l\u00fd, tr\u1ed9n ho\u1eb7c v\u1eadn chuy\u1ec3n h\u00f3a ch\u1ea5t, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u nguy c\u01a1 ch\u00e1y n\u1ed5.<\/p>\n\n\n\n

Ng\u00e0nh c\u00f4ng nghi\u1ec7p d\u1ea7u kh\u00ed: Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd v\u00e0 v\u1eadn chuy\u1ec3n d\u1ea7u kh\u00ed trong c\u00e1c nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u, gi\u00e0n khoan d\u1ea7u kh\u00ed, kho ch\u1ee9a d\u1ea7u kh\u00ed, v.v., nh\u1eb1m \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng an to\u00e0n trong m\u00f4i tr\u01b0\u1eddng c\u00f3 kh\u00ed d\u1ec5 ch\u00e1y.<\/p>\n\n\n\n

\"\"<\/a><\/figure><\/div>\n\n\n\n

Khai th\u00e1c m\u1ecf: Trong c\u00e1c ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c m\u1ecf, do s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c kh\u00ed d\u1ec5 ch\u00e1y ho\u1eb7c b\u1ee5i, qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u00f4ng gi\u00f3, th\u1ea3i kh\u00ed th\u1ea3i v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 tia l\u1eeda n\u00e0o \u0111\u01b0\u1ee3c t\u1ea1o ra \u0111\u1ec3 g\u00e2y ra v\u1ee5 n\u1ed5 trong m\u1ecf.<\/p>\n\n\n\n

S\u1ea3n xu\u1ea5t d\u01b0\u1ee3c ph\u1ea9m: Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p d\u01b0\u1ee3c ph\u1ea9m, qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u1eed l\u00fd thu\u1ed1c, b\u1ed9t ho\u1eb7c dung d\u1ecbch v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u00f4ng x\u1ea3y ra c\u00e1c v\u1ee5 n\u1ed5 b\u1ea5t ng\u1edd trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

Ng\u00e0nh c\u00f4ng nghi\u1ec7p s\u01a1n v\u00e0 s\u01a1n m\u00e0i: Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t s\u01a1n v\u00e0 s\u01a1n m\u00e0i \u0111\u1ec3 ng\u0103n ng\u1eeba h\u1ecfa ho\u1ea1n ho\u1eb7c n\u1ed5 do t\u00edch t\u1ee5 h\u01a1i dung m\u00f4i ho\u1eb7c h\u1ea1t b\u1ee5i.<\/p>\n\n\n\n

Ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m: Qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t th\u1ef1c ph\u1ea9m trong ng\u00e0nh ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u1ea7n x\u1eed l\u00fd b\u1ee5i ho\u1eb7c kh\u00ed d\u1ec5 ch\u00e1y.<\/p>\n\n\n\n

T\u1ed5ng quan, qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng an to\u00e0n v\u00e0 s\u1ea3n xu\u1ea5t trong m\u00f4i tr\u01b0\u1eddng d\u1ec5 ch\u00e1y n\u1ed5.<\/p>\n\n\n\n

3 Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 g\u00ec?<\/strong><\/strong><\/h2>\n\n\n\n

Nguy\u00ean l\u00fd ch\u1ed1ng ch\u00e1y n\u1ed5 c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 Kh\u1ea3 n\u0103ng tr\u00e1nh c\u00e1c tia l\u1eeda, h\u1ed3 quang v\u00e0 nhi\u1ec7t \u0111\u1ed9 nguy hi\u1ec3m trong qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c l\u00e0m vi\u1ec7c, t\u1eeb \u0111\u00f3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 kh\u00f4ng th\u1ec3 g\u00e2y ch\u00e1y n\u1ed5 m\u00f4i tr\u01b0\u1eddng xung quanh.<\/strong>.<\/p>\n\n\n\n

\u0110\u1ed9ng c\u01a1 ch\u00ednh c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5 s\u1eed d\u1ee5ng \u0111\u1ed9ng c\u01a1 ch\u1ed1ng ch\u00e1y n\u1ed5, v\u00e0 v\u1eadt li\u1ec7u c\u1ee7a c\u00e1nh qu\u1ea1t v\u00e0 v\u1ecf qu\u1ea1t s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u01b0\u01a1ng th\u00edch \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u ch\u1ed1ng ch\u00e1y n\u1ed5. Vi\u1ec7c l\u1eafp r\u00e1p v\u1ecf v\u00e0 c\u00e1nh qu\u1ea1t c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5, b\u1ea3o v\u1ec7 c\u1eeda h\u00fat v\u00e0 c\u1eeda x\u1ea3 kh\u00ed, \u1ea3nh h\u01b0\u1edfng c\u1ee7a t\u1ea3i tr\u1ecdng \u0111\u1ebfn s\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111\u1ed9ng c\u01a1, v\u00e0 thi\u1ebft b\u1ecb ti\u1ebfp \u0111\u1ea5t b\u1ea3o v\u1ec7, v.v., c\u0169ng ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ti\u00eau chu\u1ea9n ch\u1ed1ng ch\u00e1y n\u1ed5.<\/p>\n\n\n\n

C\u00f3 nhi\u1ec1u lo\u1ea1i qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5, ch\u1eb3ng h\u1ea1n nh\u01b0 qu\u1ea1t tr\u1ee5c ch\u1ed1ng ch\u00e1y n\u1ed5, qu\u1ea1t ly t\u00e2m ch\u1ed1ng ch\u00e1y n\u1ed5, qu\u1ea1t t\u01b0\u1eddng ch\u1ed1ng ch\u00e1y n\u1ed5, qu\u1ea1t m\u00e1i ch\u1ed1ng ch\u00e1y n\u1ed5 v\u00e0 c\u00e1c lo\u1ea1i kh\u00e1c.<\/p>\n\n\n\n

4 Y\u00eau c\u1ea7u chung \u0111\u1ed1i v\u1edbi qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong><\/strong><\/h2>\n\n\n\n

I. Y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m qu\u1ea1t th\u00f4ng gi\u00f3 ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong><\/strong><\/h3>\n\n\n\n

1. Trong ph\u1ea1m vi t\u1ed1c \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c v\u00e0 l\u01b0u l\u01b0\u1ee3ng quy \u0111\u1ecbnh, s\u1ef1 ch\u00eanh l\u1ec7ch gi\u1eefa hi\u1ec7u su\u1ea5t kh\u00ed n\u00e9n th\u1ef1c t\u1ebf c\u1ee7a m\u00e1y th\u1edf v\u00e0 hi\u1ec7u su\u1ea5t kh\u00ed n\u00e9n quy \u0111\u1ecbnh ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh sau:<\/p>\n\n\n\n

a) \u1ede l\u01b0u l\u01b0\u1ee3ng quy \u0111\u1ecbnh, gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a m\u00e1y c\u00f3 s\u1ed1 hi\u1ec7u nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng s\u1ed1 10 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 -8 %~+ 5% so v\u1edbi gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh; gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a m\u00e1y c\u00f3 s\u1ed1 hi\u1ec7u l\u1edbn h\u01a1n s\u1ed1 10 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 -5%~+5% so v\u1edbi gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh.<\/p>\n\n\n\n

b) Hi\u1ec7u su\u1ea5t c\u1ee7a m\u00e1y th\u1edf kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ea5p h\u01a1n 8% so v\u1edbi hi\u1ec7u su\u1ea5t t\u01b0\u01a1ng \u1ee9ng t\u1ea1i \u0111i\u1ec3m \u0111\u00f3.<\/p>\n\n\n\n

2. Ti\u1ebfng \u1ed3n c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 t\u1ea1i \u0111i\u1ec3m l\u00e0m vi\u1ec7c c\u00f3 hi\u1ec7u su\u1ea5t cao nh\u1ea5t ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n JB\/T 8690 v\u1ec1 m\u1ee9c \u0111\u1ed9 ti\u1ebfng \u1ed3n A (Las).<\/p>\n\n\n\n

3. S\u1ef1 t\u0103ng nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u1ed5 tr\u1ee5c v\u00e0 t\u1ed1c \u0111\u1ed9 rung c\u1ee7a gi\u00e1 \u0111\u1ee1 qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh sau:<\/p>\n\n\n\n

a) Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u1ed5 tr\u1ee5c \u0111\u01b0\u1ee3c \u0111o tr\u00ean b\u1ec1 m\u1eb7t \u1ed5 tr\u1ee5c kh\u00f4ng \u0111\u01b0\u1ee3c cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh qu\u00e1 40 \u2103.<\/p>\n\n\n\n

b) Gi\u00e1 tr\u1ecb hi\u1ec7u d\u1ee5ng c\u1ee7a v\u1eadn t\u1ed1c dao \u0111\u1ed9ng kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 4,6 mm\/s \u0111\u1ed1i v\u1edbi \u1ed5 tr\u1ee5c c\u1ee9ng v\u00e0 7,1 mm\/s \u0111\u1ed1i v\u1edbi \u1ed5 tr\u1ee5c linh ho\u1ea1t.<\/strong><\/p>\n\n\n\n

II. Y\u00eau c\u1ea7u v\u1ec1 k\u1ebft c\u1ea5u<\/strong>\u3000\u3000<\/p>\n\n\n\n

1. Y\u00eau c\u1ea7u thi\u1ebft k\u1ebf c\u01a1 b\u1ea3n<\/p>\n\n\n\n

a) Trong \u0111i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c quy \u0111\u1ecbnh, m\u00e1y th\u1edf v\u00e0 thi\u1ebft b\u1ecb ph\u1ee5 tr\u1ee3 ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00f3 tu\u1ed5i th\u1ecd ho\u1ea1t \u0111\u1ed9ng \u00edt nh\u1ea5t 10 n\u0103m (tr\u1eeb c\u00e1c b\u1ed9 ph\u1eadn hao m\u00f2n) v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng an to\u00e0n kh\u00f4ng d\u01b0\u1edbi 18.000 gi\u1edd tr\u01b0\u1edbc l\u1ea7n b\u1ea3o d\u01b0\u1ee1ng l\u1edbn \u0111\u1ea7u ti\u00ean.<\/p>\n\n\n\n

b) T\u1ed1c \u0111\u1ed9 gi\u1edbi h\u1ea1n c\u1ee7a tr\u1ee5c c\u1ee9ng c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i b\u1eb1ng 1,3 l\u1ea7n t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a.<\/p>\n\n\n\n

c) Lo\u1ea1i c\u01a1 b\u1ea3n, th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u01b0\u1eddng cong hi\u1ec7u su\u1ea5t c\u1ee7a m\u00e1y th\u1edf ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n GB\/T 3235.<\/p>\n\n\n\n

d) Qu\u1ea1t th\u00f4ng gi\u00f3 trong k\u1ebft c\u1ea5u, c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn quay v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn t\u0129nh li\u1ec1n k\u1ec1 \u0111\u1ec3 tr\u00e1nh ma s\u00e1t, nh\u1eb1m ng\u0103n ch\u1eb7n s\u1ef1 h\u00ecnh th\u00e0nh tia l\u1eeda. C\u00e1c kh\u00eda c\u1ea1nh kh\u00e1c nh\u01b0 c\u1ea5u tr\u00fac, lo\u1ea1i, \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 c\u1ee9ng, v.v. ph\u1ea3i tu\u00e2n th\u1ee7: qu\u1ea1t th\u00f4ng gi\u00f3 d\u00f2ng tr\u1ee5c ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh li\u00ean quan c\u1ee7a JB\/T 10562, qu\u1ea1t th\u00f4ng gi\u00f3 ly t\u00e2m ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh li\u00ean quan c\u1ee7a JB\/T 10563, v\u00e0 c\u00e1c lo\u1ea1i qu\u1ea1t th\u00f4ng gi\u00f3 kh\u00e1c ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan.<\/p>\n\n\n\n

2. C\u00e1nh qu\u1ea1t<\/p>\n\n\n\n

a) C\u00e1nh qu\u1ea1t c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m t\u1ed1c \u0111\u1ed9 qu\u00e1 t\u1ea3i, v\u00e0 c\u00e1nh qu\u1ea1t ph\u1ea3i \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh \u1edf t\u1ed1c \u0111\u1ed9 kh\u00f4ng d\u01b0\u1edbi 110% t\u1ed1c \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a trong th\u1eddi gian kh\u00f4ng d\u01b0\u1edbi 2 ph\u00fat, v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n JB\/T 6445.<\/p>\n\n\n\n

b) C\u00e1nh qu\u1ea1t ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng v\u00e0 \u0111i\u1ec1u ch\u1ec9nh, v\u00e0 m\u1ee9c \u0111\u1ed9 c\u00e2n b\u1eb1ng ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n JB\/T 9101.<\/p>\n\n\n\n

c) C\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c \u0111inh t\u00e1n c\u1ee7a c\u00e1nh qu\u1ea1t ph\u1ea3i s\u1eed d\u1ee5ng \u0111inh t\u00e1n c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 xuy\u00ean qua theo quy \u0111\u1ecbnh li\u00ean quan. Y\u00eau c\u1ea7u v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng \u0111inh t\u00e1n ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n JB \/ T 10214.<\/p>\n\n\n\n

III. C\u00e1c b\u1ed9 ph\u1eadn ch\u00ednh<\/strong><\/p>\n\n\n\n

a) Khi c\u00e1nh qu\u1ea1t c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng h\u1ee3p kim nh\u00f4m, bu\u1ed3ng h\u00fat kh\u00ed v\u00e0 v\u1ecf m\u00e1y ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p carbon.<\/p>\n\n\n\n

b) C\u00e1nh qu\u1ea1t c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng v\u1eadt li\u1ec7u th\u00e9p. V\u00f2ng mi\u1ec7ng bu\u1ed3ng h\u00fat c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ly t\u00e2m v\u00e0 \u0111inh t\u00e1n ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng \u0111\u1ed3ng thau ho\u1eb7c nh\u00f4m. V\u1ecf th\u00e9p c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 d\u00f2ng tr\u1ee5c ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u00e1c ph\u1ea7n c\u1ee7a v\u00f2ng \u0111\u1ed3ng thau ho\u1eb7c nh\u00f4m v\u00e0 \u0111inh t\u00e1n t\u01b0\u01a1ng \u1ee9ng.  <\/p>\n\n\n\n

c) Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c b\u1ed9 ph\u1eadn quay v\u00e0 b\u1ed9 ph\u1eadn t\u0129nh c\u1ee7a v\u1eadt li\u1ec7u kh\u00f4ng t\u1ea1o ra tia l\u1eeda. C\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a JB \/ T 10562 v\u00e0 JB \/ T 10563.<\/p>\n\n\n\n

IV.<\/strong><\/p>\n\n\n\n

a) Y\u00eau c\u1ea7u v\u1ec1 \u0111\u00fac Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u00fac ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n

b) Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c \u0111inh t\u00e1n Ch\u1ea5t l\u01b0\u1ee3ng h\u00e0n, quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c \u0111inh t\u00e1n v\u00e0 c\u00e1c y\u00eau c\u1ea7u h\u00e0n kh\u00e1c ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n

V. Y\u00eau c\u1ea7u l\u1eafp r\u00e1p\u3000\u3000<\/strong><\/strong><\/p>\n\n\n\n

a) V\u00f2ng mi\u1ec7ng bu\u1ed3ng h\u00fat c\u1ee7a qu\u1ea1t ly t\u00e2m v\u00e0 kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh t\u1ea1i mi\u1ec7ng bu\u1ed3ng h\u00fat c\u1ee7a c\u00e1nh qu\u1ea1t ph\u1ea3i \u0111\u1ed3ng \u0111\u1ec1u d\u1ecdc theo chu vi. \u0110\u1ed1i v\u1edbi qu\u1ea1t c\u00f3 s\u1ed1 hi\u1ec7u \u2264 \u2116.10, kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t ph\u00eda c\u1ee7a qu\u1ea1t l\u00e0 2,5 mm ~ 4 mm. \u0110\u1ed1i v\u1edbi qu\u1ea1t c\u00f3 s\u1ed1 hi\u1ec7u > \u2116.10, kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t ph\u00eda c\u1ee7a qu\u1ea1t l\u00e0 (0,15% ~ 0,4%) D l\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u00e1nh qu\u1ea1t, nh\u01b0ng kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t b\u00ean t\u1ed1i thi\u1ec3u kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n 2,5 mm, chi\u1ec1u d\u00e0i ch\u1ed3ng ch\u00e9o tr\u1ee5c (0,8% ~ 1,2%) D \u0111\u01b0\u1eddng k\u00ednh c\u00e1nh qu\u1ea1t. ~1,2 % ) D \u0111\u01b0\u1eddng k\u00ednh c\u00e1nh qu\u1ea1t.<\/p>\n\n\n\n

b) Kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh gi\u1eefa v\u1ecf qu\u1ea1t v\u00e0 c\u00e1nh qu\u1ea1t c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 d\u00f2ng tr\u1ee5c ph\u1ea3i \u0111\u1ed3ng \u0111\u1ec1u. S\u1ed1 hi\u1ec7u m\u00e1y ph\u1ea3i nh\u1ecf h\u01a1n ho\u1eb7c b\u1eb1ng s\u1ed1 10 c\u1ee7a kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t ph\u00eda c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 (2,5 mm ~ 4 mm), \u0111\u1ed1i v\u1edbi m\u00e1y c\u00f3 s\u1ed1 hi\u1ec7u l\u1edbn h\u01a1n s\u1ed1 10, kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t b\u00ean c\u1ee7a qu\u1ea1t (0,15% ~ 0,35%) D \u0111\u01b0\u1eddng k\u00ednh c\u00e1nh qu\u1ea1t, nh\u01b0ng kho\u1ea3ng h\u1edf b\u00e1n k\u00ednh m\u1ed9t b\u00ean t\u1ed1i thi\u1ec3u kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n 2,5 mm.<\/p>\n\n\n\n

VI. Y\u00eau c\u1ea7u v\u1ec1 an ninh<\/strong>\u3000\u3000<\/p>\n\n\n\n

a) C\u00e1c \u0111\u1ed9ng c\u01a1 ch\u1ed1ng ch\u00e1y v\u00e0 c\u00e1c ph\u1ee5 ki\u1ec7n \u0111i\u1ec7n \u0111i k\u00e8m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng.<\/p>\n\n\n\n

b) B\u1ec1 m\u1eb7t v\u1ecf qu\u1ea1t th\u00f4ng gi\u00f3 v\u00e0 b\u1ec1 m\u1eb7t c\u1ee5m truy\u1ec1n \u0111\u1ed9ng ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb thi\u1ebft b\u1ecb ti\u1ebfp \u0111\u1ea5t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u ch\u1ed1ng ch\u00e1y n\u1ed5 v\u00e0 bi\u1ec3u t\u01b0\u1ee3ng ti\u1ebfp \u0111\u1ea5t v\u0129nh vi\u1ec5n t\u1ea1i v\u1ecb tr\u00ed th\u00edch h\u1ee3p.<\/p>\n\n\n\n

c) Bu\u1ed3ng h\u00fat gi\u00f3 c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 m\u1edf tr\u1ef1c ti\u1ebfp ra m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i, bu\u1ed3ng h\u00fat gi\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t l\u01b0\u1edbi b\u1ea3o v\u1ec7 c\u1ed1 \u0111\u1ecbnh (ho\u1eb7c l\u01b0\u1edbi) \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c v\u1eadt th\u1ec3 l\u1ea1 b\u1ecb h\u00fat v\u00e0o qu\u1ea1t. Thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac l\u01b0\u1edbi b\u1ea3o v\u1ec7 (l\u01b0\u1edbi) ngo\u00e0i vi\u1ec7c xem x\u00e9t k\u00edch th\u01b0\u1edbc c\u1ee7a qu\u1ea1t, m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c, c\u0169ng c\u1ea7n xem x\u00e9t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ee9c c\u1ea3n c\u1ee7a lu\u1ed3ng kh\u00f4ng kh\u00ed do vi\u1ec7c l\u1eafp \u0111\u1eb7t l\u01b0\u1edbi b\u1ea3o v\u1ec7 (l\u01b0\u1edbi) g\u00e2y ra.<\/p>\n\n\n\n

d) Nh\u00f3m truy\u1ec1n \u0111\u1ed9ng, b\u1ed9 n\u1ed1i, puli, d\u00e2y \u0111ai v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn truy\u1ec1n \u0111\u1ed9ng quay kh\u00e1c ph\u1ea3i \u0111\u01b0\u1ee3c trang b\u1ecb v\u1ecf b\u1ea3o v\u1ec7 an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n GB\/T 19074. C\u1ea5u tr\u00fac v\u1ecf b\u1ea3o v\u1ec7 ph\u1ea3i ch\u1eafc ch\u1eafn v\u00e0 tr\u00e1nh ti\u1ebfp x\u00fac v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn quay. \u0110\u1ec3 tr\u00e1nh t\u00edch t\u1ee5 t\u0129nh \u0111i\u1ec7n tr\u00ean v\u1ecf b\u1ea3o v\u1ec7 g\u00e2y tia l\u1eeda, v\u1ecf b\u1ea3o v\u1ec7 ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e1ch \u0111i\u1ec7n v\u00e0 c\u00f3 thi\u1ebft b\u1ecb ti\u1ebfp \u0111\u1ea5t \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n

e) C\u00e1c b\u1ed9 ph\u1eadn quay c\u1ee7a qu\u1ea1t th\u00f4ng gi\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn v\u00e0 ph\u1ea3i c\u00f3 c\u00e1c bi\u1ec7n ph\u00e1p \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 l\u1ecfng l\u1ebbo (c\u00e1nh qu\u1ea1t v\u00e0 tr\u1ee5c \u0111\u01b0\u1ee3c kh\u00f3a ch\u1eb7t; v\u1ecb tr\u00ed c\u1ee7a \u1ed5 tr\u1ee5c, h\u1ed9p \u1ed5 tr\u1ee5c, \u0111\u1ed9ng c\u01a1 v\u00e0 gi\u00e1 \u0111\u1ee1 \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh).<\/p>\n\n\n\n

f) Khi qu\u1ea1t th\u00f4ng gi\u00f3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, tr\u1ee5c c\u00e1nh qu\u1ea1t \u0111i qua v\u1ecf m\u00e1y, v\u1ecf th\u00e9p c\u1ee7a l\u1ed7 tr\u1ee5c v\u00e0 ph\u1ea7n tr\u1ee5c \u0111i qua n\u00ean \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u1edbi m\u1ed9t v\u00f2ng \u0111\u1ec7m c\u00e1ch ly b\u1eb1ng nh\u00f4m; l\u1ed7 c\u1ee7a v\u00f2ng \u0111\u1ec7m c\u00e1ch ly v\u00e0 tr\u1ee5c ph\u1ea3i c\u00f3 kho\u1ea3ng h\u1edf m\u1ed9t ph\u00eda l\u00e0 0,5 mm.<\/p>\n\n\n\n

5. H\u01b0\u1edbng d\u1eabn ch\u1ecdn l\u1ef1a v\u00e0 k\u00edch th\u01b0\u1edbc<\/h2>\n\n\n\n

L\u1ef1a ch\u1ecdn qu\u1ea1t ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u00f9 h\u1ee3p \u0111\u00f2i h\u1ecfi ph\u00e2n t\u00edch k\u1ef9 l\u01b0\u1ee1ng v\u1ec1 \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n. S\u1eed d\u1ee5ng danh s\u00e1ch ki\u1ec3m tra sau:<\/p>\n\n\n\n