Some standard content:
ICS73.120
D95
JB
Machinery Industry Standard of the People's Republic of China
JB/T938-1999
Uniaxial vibrating screen for coal||tt ||Single shaft vibrating screen for coal1999-06-28 Released
National Machinery Industry Bureau
Released
Implemented on 2000-01-01
JB/T938-1999| |tt||Foreword
This standard is a revision of JB938-86 "Single-axis Vibrating Screen for Coal". During the revision, editorial changes were made to the original standard, and the main technical content remained unchanged.
From the date of implementation, this standard will replace JB938-86. This standard is proposed and centralized by the National Mining Machinery Standardization Technical Committee. The unit responsible for drafting this standard: Anshan Mining Machinery Co., Ltd. The main drafters of this standard: Liu Xianghua, Wang Qiwei, Zhang Weiping, Lu Baozhu, Huang Jialin This standard was first published in 1967, revised for the first time in 1978, and secondly on August 15, 1986 revision. l |tt||This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of single-shaft vibrating screens for coal.
This standard applies to single-axis vibrating screens for coal (hereinafter referred to as vibrating screens). This machine is mainly used for screening coal and can also be used for screening other non-metallic minerals.
2 Reference standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB 191—1990
GB/T699—1988
GB/T700—1988
GB713—1997
GB/T6388—1986
GB 9969.1— 1998
GB/T13306—1991
GB/T13384—1992
JB/T4042—1999
JB/T5496—1991
JB/T9031— 1999
JB/T9032—1999
3 product categories
Packaging, storage and transportation pictorial mark
Technical conditions of high-quality carbon structural steel
Carbon structure Steel
Steel plate for boiler
Transportation packaging receipt and delivery mark
Industrial product instruction manual
General principles
Signage
General mechanical and electrical product packaging Technical Conditions
Vibrating Screen Test Method
General Technical Conditions for Vibrating Screen Manufacturing
Mining Perforated Screen Plate
Mining Metal Braided Screen
3.1 The vibrating screen can be divided into seat type or hanging type, and the motor can be left-mounted or right-mounted. The model representation method is as follows:
3.2
National Machinery Industry Bureau approved 1999-06-28 and implemented on 2000-01-01
1
JB/T938-1999|| tt||M-×
Screen surface length, dm
Screen surface width, dm
Coal use
Single shaft
Installation type: Z is Seat type, D is hanging type
Number of layers, single layer does not note
3.3 Basic parameters and dimensions should comply with the provisions of Table 1 and Figure 1 Figure 1
Values||tt| |Parameter name unit
Screen box specifications (width × length)
Working area
Number of screen layers
Screen hole size
Screen surface inclination angle| |tt||Vibration frequency
Vibration
Amplitude
Maximum feeding particle size
Motor
Machine weight
Upper layer||tt| |lower layer
power
speed
type
number
mm
m2
layer
mm
mm
(°)
Hz
mm
mm
kw
r/min||tt| |kg
Note: The motor speed is the synchronous speed.
ZDM
-1235
DDM
-1235
1250×3500
3.5
ZDM||tt| |-1740
DDM
-1740
1750×4000
6.0
1
50~100
17 ±2.5
2.5~3.5
5.5
2240
2110
7.5
3270
3150||tt| |ZDM
-1556
Table 1
DDM
-1556
2ZDM
-1556
1500×5600
7.5
25~100bzxz.net
15.3
10.0
3620
3380
2DDM
- 1556
6~25
ZDM
-1756
DDM
-1756
1750×5600
9.0| |tt||25~50
ZDM
-2056
1
20 ± 2.5
3.0~4.0
400|| tt||17.0
5350
1500
5100
13.0
4210
4000
DDM||tt| |2056
2ZDM
2056
2000×5600
10.0
2DDM
2056
2||tt| |25~125
6~25
13.3
17.0
4600
5900
5660
ZDM|| tt||-2556
2ZDM
-2556
2500×5600
13.0
1
JB/T938-1999|| tt | Coordinated parts and outsourced parts must have certificates of conformity and must be inspected by the quality inspection department before they can be assembled. 4.3 The structure of the vibrating screen should ensure that:
a) facilitate maintenance and replacement of wearing parts;
b) prevent dust from falling into the bearings and bearing oil leakage;) bolts should be prevented from loosening; ||tt ||①) Under normal working conditions, there is no deviation or spillage of materials from the side panels. 4.4 The performance of the complete machine should meet the following requirements:
a) Smooth operation without jamming;
b) The vibration frequency deviation is 2.5%;
c) Both sides of the screen box The amplitude difference between the plate symmetry points should not be greater than 0.5mmd) The lateral swing of the screen box should not be greater than 1mm; e) The bearing temperature rise should not exceed 40°C, and the maximum temperature should not exceed 75°C; f) The noise when no-load should not be greater than 90dB ( A). 4.5. The screen box should meet the following requirements:
a) The two side plates should be made of steel plates with mechanical properties not lower than 20g in GB/T699, 20g in GB713 or Q235-B steel plates in GB/T700, and shall not be spliced. ;
b) The cross beams are made of seamless steel pipes made of 20 steel;) The two diagonals of the screen frame should be of equal length, and the error should not be greater than 1/1000 of the diagonal length: ①) Screen box shell and Vibrator parts should not have cracks and other visible defects, and welding repairs are not allowed (except steel castings). 4.6 The sieve plate should meet the following requirements:
a) The punched sieve plate should meet the requirements of JB/T9031, and the sieve plate width size deviation should not exceed 2mm; b) The screen mesh should meet the requirements of JB/T9032. 4.7 The stiffness of the damping springs should be the same, and the stiffness deviation should not exceed ±5% of the rated value. The coil springs should be shot blasted. 4.8 The painted surface should be uniform, and no defects such as cracks, peeling, bubbles and flow marks are allowed. 4.9 Complete supply scope of vibrating screen:
a) Vibrating screen body;
b) Rotating parts protective cover;
c) Motor and motor base;
d) Belt ;
e) supporting device.
5 Test method
The test method should comply with the provisions of JB/T4042. 4
6 Inspection Rules
6.1 Inspection Categories
JB/T938-1999
The inspection of vibrating screens is divided into factory inspection and type inspection. 6.2 Factory inspection
6.2.1 Each vibrating screen must pass the manufacturer's inspection before leaving the factory. Documents proving that the product quality is qualified should be attached when leaving the factory. 6.2.2 Factory inspection should be carried out at the manufacturer. After 4 hours of dry operation, the following items should be inspected: a) The basic parameters comply with the provisions of Table 1;
b) The performance of the complete machine meets the requirements of 4.4;
c ) Factory inspection should also meet the requirements of 4.7 and 4.8. 6.3 Type inspection
6.3.1 Type inspection shall be carried out when the vibrating screen has one of the following circumstances: a) When new products or old products are transferred to the factory for production; b) After formal production, the product structure, materials, and processes have major changes. When changes are made; c) When the product resumes production after a long-term suspension; d) When the results of the factory inspection have greatly changed from the previous inspection; e) When the national quality supervision and inspection agency proposes type inspection requirements. 6.3.2 Type inspection items should include all requirements of this standard. Type inspection shall be carried out by randomly selecting one product from the products that have passed the factory inspection. If the inspection fails, one adjustment or additional measures are allowed. 6.3.3
Sampling inspection.
7 Logo, label and instruction manual
7.1 Each vibrating screen should have a product label fixed at an appropriate and obvious position. The sign should comply with the regulations of GB/T13306 and indicate the following:
a) Manufacturer name;
b) Product name and model;
c) Main technical parameters; || tt||d) Production date and factory number.
7.2 The vibrating screen should prepare a product instruction manual, which should comply with the regulations of GB9969.1. 7.3 The packaging marks of the vibrating screen include the transportation, packaging, receipt and delivery marks and the packaging, storage and transportation icon marks. The logo should comply with the regulations of GB/T6388 and GB191.
8 Packaging, transportation and storage
8.1 The packaging of the vibrating screen should comply with the regulations of GB/T13384. Except for electrical equipment, V-belts, etc., which are packaged in closed packaging, the rest can be packaged or naked. Packing boxes and packages should comply with requirements for land and water transport. 8.2 The packaging box should be ventilated and rainproof. The outer wall should have obvious text marks and should comply with the provisions of 7.3. The content includes: a) the name of the receiving station and the receiving unit;
b) the name of the shipping station and the shipping unit; ||tt| |c) Contract number, product name and model:
d) Gross weight, net weight, box number and overall dimensions; e) Center of gravity, lifting line, storage and transportation icons. JB/T938—1999
8.3 When naked, a sign should be attached at an obvious location. The sign should comply with the provisions of 7.3, and its center of gravity should be marked on the product. 8.4 The exposed metal processing surface should be coated with anti-rust grease and wrapped with polyvinyl chloride plastic film. 8.5 The vibrating screen should be accompanied by the following technical documents: a) packing list;
b) product certificate or quality certificate:
c) product instruction manual;
d) product Installation drawings and other relevant technical information. 5. When storing the vibrating screen, it should be placed flat and stable, and should be kept at a certain distance from the ground. It should not be stacked. Measures should be taken to prevent rain, sun and accumulation of water when stored in the open air.
8.7 The vibrating screen should be maintained once after being stored for one year. 6
People's Republic of China
Mechanical industry standards
Single-shaft vibrating screen for coal
JB/T938—1999
Published and issued by the Institute of Mechanical Science| |tt||Printed by the Institute of Mechanical Science
(No. 2, Shouti South Road, Beijing
Postcode 100044)
Format 880×1230
1/16||tt| |Print sheet 3/4
Number of words 14,000
First edition in November 1999. First printing price in November 1999: 10.00 yuan
Print number 1-500
No.
99-820
Machinery Industry Standard Service Network: 6661
86
L/ar
3, the contents include: a) Name of receiving station and receiving unit;
b) Name of shipping station and shipping unit;
c) Contract number, product name and model:
d) gross weight, net weight, box number and overall dimensions; e) center of gravity, lifting lines, storage and transportation icons and marks. JB/T938—1999
8.3 When naked, a sign should be attached at an obvious location. The sign should comply with the provisions of 7.3, and its center of gravity should be marked on the product. 8.4 The exposed metal processing surface should be coated with anti-rust grease and wrapped with polyvinyl chloride plastic film. 8.5 The vibrating screen should be accompanied by the following technical documents: a) packing list;
b) product certificate or quality certificate:
c) product instruction manual;
d) product Installation drawings and other relevant technical information. 5. When storing the vibrating screen, it should be placed flat and stable, and should be kept at a certain distance from the ground. It should not be stacked. Measures should be taken to prevent rain, sun and accumulation of water when stored in the open air.
8.7 The vibrating screen should be maintained once after being stored for one year. 6
People's Republic of China
Mechanical industry standards
Single-shaft vibrating screen for coal
JB/T938—1999
Published and issued by the Institute of Mechanical Science| |tt||Printed by the Institute of Mechanical Science
(No. 2, Shouti South Road, Beijing
Postcode 100044)
Format 880×1230
1/16||tt| |Print sheet 3/4
Number of words 14,000
First edition in November 1999. First printing price in November 1999: 10.00 yuan
Print number 1-500
No.
99-820
Machinery Industry Standard Service Network: 6661
86
L/ar
3, the contents include: a) the name of the receiving station and the receiving unit;
b) the name of the shipping station and the shipping unit;
c) the contract number, product name and model:
d) gross weight, net weight, box number and overall dimensions; e) center of gravity, lifting line, storage and transportation diagram. JB/T938—1999
8.3 When naked, a sign should be tied in a conspicuous position. The sign should comply with the provisions of 7.3, and the center of gravity position should be marked on the product. 8.4 The exposed metal processing surface should be coated with anti-rust grease and wrapped with polyvinyl chloride plastic film. 8.5 The vibrating screen should be accompanied by the following technical documents: a) packing list;
b) product certificate or quality certificate:
c) product instruction manual;
d) product installation diagram and other relevant technical data. 5 The vibrating screen should be stored flat and stable, and keep a certain distance from the ground, and cannot be stacked. 8.6
Measures should be taken to prevent rain, sun and water accumulation when storing in the open air.
8.7 The vibrating screen should be maintained once it is stored for one year. 6
Standard of the Machinery Industry of the People's Republic of China
Single-axis vibrating screen for coal
JB/T938—1999
Published and distributed by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
1 /16
Printing sheet 3/4
Word count 14000
First edition in November 1999 First printing in November 1999 Price 10.00 yuan
Printing quantity 1-500
Number
99-820
Mechanical Industry Standard Service Network: 6661
86
L/ar
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