Conveyor Pulley

Diantara agan-agan pasti ada yang pernah denger apa itu pulley (katrol) kan?. Tapi disini gue hanya fokus pada pulley di conveyor. Memang ilmu baru buat gue, cuma sekedar bikin cacatan pribadi sekaligus berbagi :D.

kalo kata mbah Wiki, pulley conveyor adalah Sebuah katrol conveyor merupakan alat mekanis digunakan untuk mengubah arah sabuk dalam sistem conveyor , untuk mendorong sabuk, dan ketegangan sabuk. Engineering katrol awal dikembangkan oleh Josef Sitzwohl di Australia pada tahun 1948 dan kemudian oleh Helmuth Lange dan Walter Schmoltzi di Jerman. 

Kalo menurut orang yang ngasih tahu ke gue, satu sistem pulley sederhana di conveyor terdiri dari:

- Tail Pulley

- Head Pulley 

- High Tension Belt Pulley

- Drive Pulley

- Low Tensin Belt Pulley dan 

- Take up Pulley

Nih gan, gambar yang ane dapet dari mbah google, (hehhe maklum saya juga sambil belajar bukan master) 

Gambarnya sedikit beda sama yg di bikin di helix, next time gue attach juga gambar pulley yang biasa di bikin (common sense).

Sebenernya type pulley macem-macem, tergantung agan mau bikin conveyor type apa, nah system pulley yg gue sebutin di atas itu untuk satu system Barge Loading conveyor (skyline) sekaligus overland nya.

Nih contoh bikinan ane, sengaja softwarenya ane umpetin, entar minta royalti lagi hehhe.

Kalo agan yang perlu detail Pulley conveyor kaya gimana, ane attach contohnya, tapi kalo kurang jelas silahkan kasih masukan, maklum newbie :D. lebih jelasnya lagi agan bisa cari di mbah Google.

sekian aja dulu gan, semoga bermanfaat. Ada masukan silahkan Comment, maklum saya juga lagi belajar masih Newbie :D. 

Moms, barang kali diantara kalian ada yang sedang kebingungan dengan Kondisi telapak kaki dan telapak tangan anak berwarna kuning. Jangan langsung berasumsi bahwa itu adalah Hepatitis, bisa saja karena penyebab seperti carotenemia. Ini berdasarkan pengalaman saya yang sempat parno karena anak saya mengalami gejala seperti di bawah ini. So selamat membaca..

Kuning pada telapak kaki dan tangan biasanya akibat tingginya pigmen karoten (carotene) di tubuh atau disebut carotenemia, Ma. Ini dia penjelasan lainnya, Ma:

• Karoten adalah pigmen yang dihasilkan oleh tanaman yang menyebabkan sayur dan buah berwarna kuning atau oranye. Namun karoten juga terdapat di sayuran berwarna hijau. 

• Semakin gelap warna hijaunya, semakin tinggi karotenenya. Karoten  ini merupakan sumber utama vitamin A. Penyerapan karoten di usus akan meningkat pada makanan yang sudah dimasak dan sudah dilembutkan (puree) karena pengolahan tersebut menghancurkan serat. 

• Karoten pun diserap lebih cepat dan banyak. Biasanya, carotenemia ditemukan pada bayi dan anak kecil karena makanan mereka masih lembut. Dan kondisi ini disebabkan oleh konsumsi makanan tinggi karoten, seperti wortel, ubi kuning, labu kuning, dan lain-lain. 

• Warna kuning ini mencolok di telapak tangan, telapak kaki, dan lipatan bibir hidung. Mata tidak akan berwarna kuning sehingga bisa dibedakan dengan kuning akibat penyakit hati.

• Kondisi ini sifatnya ringan, tidak berbahaya, tidak menimbulkan komplikasi apapun dan akan membaik dengan mengubah pola diet. Anda tidak perlu ke dokter. Nantinya, saat berkonsultasi (misalnya untuk imunisasi), Anda bisa tanyakan pada dokter untuk memastikan kondisi si kecil tersebut apakah memang benar carotenemia atau tidak.(Foto: dok. Feminagroup.)

Well, kadang gue suka lupa standar stair, maka disini gue bakalan share sekaligus buat remind me dikala lupa. Berikut adalah Standar Stair yang gue sadur dari AISC (American Istitute of Stell Construction).
Sorry juga nih bahasanya di mix Prinsip Dasar Detailing Stair:

STRUCTURAL STEEL COMPONENTS.

Tread: The tread is the piece of steel
that makes up the steps of the stair.The tread can be made from grating or
from pans (both shown in Figure 1).
Grating is typically used in industrial
buildings while pans are usually used in
commercial structures. The grating type
of tread is plate, but the pan shape dips
down so that the concrete can be poured
into its base.
Sanitary-type pans, which are common
in hospitals, have an additional lip
that prevents dirt from falling into the
corner of the pan.
(Pan and grating treads are shown in
Figure 2.)

Stringers: The stringers support the

ends of the treads. Stringers are often

rectangular hollow sections, channels or

plate. The top of the stringer is connected

either to a supporting beam or to a dog leg (see Figure 3).

The bottom of the stringer is connected

to a supporting beam, a dog leg, or

the ground. If attached to a supporting

beam, the stringer can be bolted or

welded. If attached to a dog leg, the

stringer will be welded.

Supporting Beam: The supporting

beam supports the stringer or the dog

leg (if it exists). Each stringer can be

independently supported. Alternately,

both stringers can be supported with

the same supporting beam. The supporting

beams are usually wide flange

sections or channels.

Dog legs: The location of the supporting

beams determines whether dog legs

are actually needed (as shown in Figure

4). A dog leg is needed when a viable

connection cannot be made to the supporting

beam directly from the stringer.

The dog leg can be the support for the

landing at the top of the stair, if one

exists.

Special pans: These are required at

the top and bottom of a pan stair. One

special pan closes the stair against the

concrete or platform, and the other pan

closes off the top of the stair (see Figure

5).

LOCATION

The main parameters for

locating the stairs are:

• Rise and tread

• Nosing points and nosing line

• Stringer offset values

• Dog leg to nosing point height

• Safe rise and safe run

• Number of treads

An explanation of these terms

follows:

Rise and tread: Although the

actual stair step is called the

tread, there is also a measurement,

as shown in Figure 1,

which is termed the 'tread'. This

is the horizontal distance

between two consecutive treads.

The rise is the vertical distance

between two consecutive treads.

Nosing line and nosing

points: In order for the stair to

be set up properly, every corner

of every tread should pass

through a single line. That line

is called the nosing line, and the

corner points on the tread

through which the line traverses

are called the nosing points.

Stringer offset value (top of

steel of stringer to nosing

line): As shown in Figure 6, the

stringer offset is the perpendicular

distance between the top of

steel of the stringer and the nosing

line. The stringer offset

value is required for locating the

stringer in space.

Dog leg to nosing point

height: Where dog legs are

required (i.e. cases where the

stringer can't directly make a

viable connection to the supporting

beam), it is necessary to

locate the dog legs. The top dog

leg to nosing point height is the

distance from the top nosing

point to the top of steel of the top

dog leg. The bottom dog leg to

nosing point height is the distance

from the bottom nosing

point to the top of steel of the

bottom dog leg.

Safe rise and safe run: The following

general guidelines are

typically used for indoor stairs in

insuring that the stair is safe:

• 3/16 maximum variation in rise

or tread is allowable.

• 2 x rise + tread should be

between 24” and 25”.

• Rise + tread should be

between 17” and 171/2”.

• Angle of the stair should be

between 20 and 50 degrees.

Note: tread minimum and rise

maximum, as well as other

important parameters are governed

by local or state codes.

Number of treads: The number

of treads is obtained by dividing

the total rise by the safe rise, or

alternately by dividing the total

run by the safe run.

CONNECTIONS

Grating to stringer: A typical

grating to stringer connection is

shown in Figure 7. The grating

manufacturer specifies the location

of the bolt holes.

Pan to stringer: A typical pan

to stringer connection is shown in

Figure 7. Other connection types

include double angles with a

square rod bent around the pan

and welded to both the pan and

the stringer.

Stringer to dog leg: A common

stringer to dog leg connection is

shown in Figure 3. This is a

welded connection with both

ends mitered.

Stringer to ground: A common

stringer to concrete floor connection

is shown in Figure 3.

Sekian dulu yaaa, buat standar koneksinya i'll be back soon :D so you better keep watching