JB/T 2445-1999 This standard is a revision of JB 2445-78 "Curved Screen for Coal". This standard specifies the types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of curved screens for coal. This standard applies to curved screens for coal. The curved screen is mainly used for pre-dehydration, desludging and de-intermediation of medium and fine-grained coal (particle size less than 50mm). This standard was first published on the date of year. JB/T 2445-1999 Curved Screen for Coal JB/T2445-1999 Standard download decompression password: www.bzxz.net

ICS73.120
Machinery Industry Standard of the People's Republic of China
JB/T2445—1999
Curved Screen for Coal
Sievebendforcoal
Published on 1999-06-28
National Bureau of Machinery Industry
Implemented on 2000-01-01
JB/T2445—1999
This standard is a revision of JB244578 "Curved Screen for Coal". During the revision, the original standard was edited, and the main technical content remained unchanged
This standard replaces JB2445—78 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Mining Machinery. The responsible drafting unit of this standard: Shanghai Mining Screen Factory. The drafters of this standard: Guo Zhenwei and Huang Jialin. 1 Scope
Machinery Industry Standard of the People's Republic of China
Sieve bend for coal
Sieve bend for coal
JB/T2445—1999
Replaces JB244578
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of curved screens for coal.
This standard applies to curved screens for coal (hereinafter referred to as curved screens). The curved screen is mainly used for pre-dehydration, desludging and de-mediuming of medium and fine-grained coal (particle size less than 50mm). 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—1990
GB/T709—1988
GB/T985—1988
GB/T133061991
GB/T133841992
JB/T16041998
JB/T42661999
3 Types and basic parameters
Packaging, storage and transportation Graphical symbols
Dimensions, shapes, weights and allowable deviations of hot-rolled steel plates and stripsBasic forms and dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding
General technical conditions for packaging of electromechanical products
Model compilation method for mining machinery products
Arc screen
The screen box of the arc screen can be tilted and can be rotated when placed in a horizontal position to facilitate uniform wear on both ends of the arc screen. The arc screen in the screen box is a fixed slit screen surface. 3.3 The product model representation method shall comply with the provisions of JB/T1604. HM-口only口
Angle code, 1 is 45°, Ⅱ is 60°arc radius, dm
screen width, dmWww.bzxZ.net
fixed screen
other screens
approved by the State Machinery Industry Bureau on 1999-06-28, implemented on 2000-01-01
JB/T2445-1999
3.4 ​​The basic parameters of the curved screen shall comply with the provisions of Table 1Table 1
SUHM-1010
SUHM-1015
SUHM-1210
SUHM-1215
SUHM-1515
SUHM-1520
SUHM-1715
SUHM-1720
SUHM-2220
Technical requirements
Radius of curvature
Screen box width
The curved screen shall meet the requirements of this standard and be manufactured according to the drawings approved by the prescribed procedures and complete process documents. The screen shall meet the requirements of JB/T4266. The carbon steel plates used shall meet the requirements of GB/T709. The welds shall meet the requirements of GB/T985.
After welding, the flatness error of all steel plates shall be less than 2mm per square meter. The parallelism tolerance of the two side plates of the screen box is 3mm. All surfaces except stainless steel should be coated with two coats of anti-rust primer, and the exposed surface should be coated with two coats of topcoat. The exposed painted surface should be free of flow marks, bubbles, and uneven colors. Test method
The appearance of welding quality is visually inspected, and the strength of the weld is checked according to the physical and chemical test records of the material. The external dimensions are measured with conventional measuring tools with a scale value of 1mm. Flatness can be replaced by straightness, and measured with a ruler and a feeler gauge. The parallelism of the two side plates of the screen box is measured with a special measuring tool. The thickness of the steel plate is measured with an outside diameter micrometer. Inspection rules
Each curved screen must pass the factory inspection of the quality inspection department of the manufacturer before it can be shipped, and a certificate of conformity should be attached when it leaves the factory. The factory inspection should meet the requirements of 4.3~4.5 and 4.7. 6.2
7 Marking, packaging, transportation and storage
7.1 Each curved screen should have a product label fixed in a conspicuous position. The type and size of the label shall comply with the provisions of GB/T13306 and indicate the following:
a) Product name and model:
b) Main technical parameters:
c) Factory number and date:
d) Manufacturer name and logo.
JB/T2445-1999
The product is packed in wooden boxes, and the packaging shall comply with the requirements of GB/T13384. 7.2
The packaging box shall be clearly marked, and the packaging storage and transportation graphic mark shall comply with the provisions of GB191. The packaging shall comply with the requirements of water and land transportation, and the product shall be stored in a dry and non-corrosive place. 7.5
Republic
Mechanical Industry Standard
Coal Curved Screen
JB/T2445—1999
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing: Postal Code 100044)*
1/16 Printing Sheet 1/2 Number of Words 8000
Format 880×1230
First Edition in November 1999
First Printing in November 1999
Print Quantity 1-500
Price 500 Yuan
99-823
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cn666
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