Some standard content:
JB/T 7891.1-1999
This standard is a revision of JB/T7891-95 "YA type circular vibrating screen". During the revision, the original standard was edited, and the main technical content remained unchanged.
This standard replaces JB/T7891-95 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: Anshan Mining Machinery Co., Ltd. The main drafters of this standard: Liu Xianghua, Wang Qiwei, Zhang Weiping, Lv Baozhu, Huang Jialin. This standard was first issued in June 1985 as GB6063-85 and was adjusted to JB/T7891-95 in April 1996. 511
1 Model
Standard of the Machinery Industry of the People's Republic of China
Model YA circle vibrating screen
Model YA circle vibrating screenJB/T 7891.1--1999
Replaces JB/T 7891--95
This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, labels, operating instructions, packaging, transportation and storage of YA circle vibrating screen.
This standard applies to YA circle vibrating screen (hereinafter referred to as vibrating screen). The machine is mainly used for screening bulk materials such as coal, ore and coke.
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 version of the following standards. GB191—1990 Pictorial signs for packaging, storage and transportation
GB/T699—1988 Technical conditions for high-quality carbon structural steel
GB/T 700—1988
Carbon structural steel
GB713—1997 Steel plates for boilers
GB/T 1239.4—1989
Technical conditions for hot-rolled cylindrical helical springs
GB/T 6388—1986
Marks for shipping and receiving of transport packaging
GB 9969.1—1998
General rules for instructions for use of industrial products
GB/T 13306--1991
GB/T 13384—1992
JB/T 1604--1998
JB/T 4042—1999
JB/T 5496—1991
JB/T 9031—1999
JB/T 9032--1999
3 Product classification
General technical conditions for packaging of electromechanical products
Model compilation method for mining machinery products
Test method for vibrating screen
Vibrating screen
General technical conditions for manufacturing
Perforated screen plate for mining
Metal woven screen for mining
3.1 The vibrating screen can be installed in a seated or hanging manner, and the motor can be installed on the left or right, as shown in Figure 1. Approved by the Bureau of Machinery Industry of Guijia on June 28, 1999, 512
Implemented on January 1, 2000
—1999
QB 7891.1-
3.2 The model representation method of the vibrating screen shall comply with the provisions of JB/T1604. Y
Screen box length, dm
Screen box width, dm
Heavy duty H, light duty omitted
Axis eccentricity
Circular vibrating screen
Number of layers, single layer omitted
3.3 The basic parameters of the vibrating screen shall comply with the provisions of Table 1. 513
JB/T 7891.1—1999
JB/T 7891.1
0001002
001～09
98～9
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0*050 021~010\05~500'1~901009~901081900.09-
000900
0080081
009008
Motor cable
4 Technical requirements
JB/T 7891.1—1999
4.1 The vibrating screen shall comply with the provisions of this standard and JB/T5496, and shall be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.2 All outsourced and purchased parts shall have a certificate of conformity, and shall be assembled only after being inspected and qualified by the quality inspection department. 4.3 The structure of the vibrating screen shall meet the following requirements: a) It is convenient to repair and replace vulnerable parts; b) Dust and oil leakage shall not enter the vibrator; c) Bolts shall be prevented from loosening;
d) Under normal working conditions, the material shall not deviate or spill out of the side plate. 4.4 The performance of the whole machine shall meet the following requirements:
a) The vibration frequency deviation shall not exceed ±2.5%; b) The amplitude difference of the symmetrical points on both sides of the screen box shall not be greater than 0.5mm, and the lateral swing shall not be greater than 1mm; the operation shall be smooth and flexible without jamming; d) The bearing temperature rise shall not exceed 40C, and the maximum temperature shall not exceed 75C; e) The noise shall not be greater than 90dB (A) when no-load; f) The screen plate shall be firmly fixed on the screen frame without secondary vibration; g) The height error of the symmetrical spring after assembly shall not be greater than 5mm. 4.5 The screen box shall meet the following requirements:
a) The side plates shall be made of 20 steel in GB/T699, 20g in GB713 or Q235-B steel plate in GB/T700, and shall not be spliced;
b) The flatness error of the screen surface bracket after forming shall not be greater than 2mm per square meter, and the equal length error of the two diagonals shall not be greater than 1 mm per meter;
c) The crossbeam is not allowed to be spliced in the vertical direction; d) The tensile strength of the ring groove rivet shall not be less than 800N/mm2, and the nail sleeve material shall meet the mechanical property requirements of 10 steel in GB/T699, and shall be passivated.
4.6 The woven screen shall meet the requirements of JB/T9032, and the punched screen plate shall meet the requirements of JB/T9031. 4.7 The spring shall meet the requirements of GB/T1239.4 and shall be shot peened. ,4.8 The vibrator shall meet the following requirements:
a) Bearings with increased clearance shall be used, lubricating oil of specified brand shall be used, and there shall be no oil leakage; b) After assembly, the axial play of the eccentric shaft shall not exceed 2~~4mm; c) Vibrator parts shall not have cracks and other visible defects, and welding repair and repair of rotating parts are not allowed. 4.9 The paint shall be evenly applied, and there shall be no defects such as bubbles, cracks, peeling and flow marks on the paint surface. 4.10 Scope of supply of complete set of vibrating screen:
a) Main part of vibrating screen;
b) Motor and motor seat;
c) Protective cover of rotating parts;
d) V-belt:
e) Support device;
f) Vibrating screen chassis (user optional part); g) Spare parts provided according to the order contract.
5 Test method
The test method of vibrating screen shall comply with the relevant provisions of JB/T4042.
6 Inspection rules
6.1 Inspection classification
JB/T 7891.1--1999
The inspection of vibrating screen is divided into factory inspection and type inspection. 6.2 Factory inspection
6.2.1 Each vibrating screen must be inspected and qualified by the manufacturer before it can be shipped out of the factory. When it leaves the factory, it should be accompanied by documents proving the quality of the product. 6.2.2 The factory inspection is carried out at the manufacturer. After idling for 4 hours, the following items are inspected and tested: a) Amplitude;
b) Noise;
c) Vibration frequency;
d) Maximum bearing temperature and bearing temperature rise:
e) Amplitude difference between the symmetrical points of the two side plates;
f) Lateral swing of the screen box.
6.3 Type inspection
6.3.1 The vibrating screen shall be subjected to type inspection in any of the following cases: a) when a new product or old product is transferred to another factory for production; b) after formal production, when there are major changes in product structure, materials, and processes that may affect product performance; c) during normal production, an inspection shall be carried out every 3 years or every 50 units produced; d) when production is resumed after a long period of suspension;
e) when there is a significant difference between the factory inspection result and the last type inspection result; f) when the national quality supervision agency makes a type inspection request. 6.3.2 Type inspection items shall include all requirements of this standard. 6.3.3 Type inspection shall be carried out on one unit randomly selected from the products that have passed the factory inspection. If the inspection fails, double sampling shall be carried out. 7 Markings, labels and instruction manuals
7.1 Each vibrating screen shall have a product label fixed in an appropriate and obvious position. The label shall comply with the provisions of GB/T13306 and indicate the following:
a) manufacturer name;
b) product name and model:
c) main technical parameters,
d) production date and factory number.
7.2 A product instruction manual shall be prepared for the vibrating screen. The instruction manual shall comply with the provisions of GB9969.1. 7.3 The packaging mark of the vibrating screen shall include the transport packaging receipt and delivery mark and the packaging storage and transportation diagram mark. The mark shall comply with the provisions of GB/T6388 and GB191.
8 Packaging, transportation and storage
8.1 The packaging of the vibrating screen shall comply with the requirements of GB/T13384. Except for electrical equipment, V-belts, etc., which are closed, the rest can be wrapped or naked. The packaging box and packaging should meet the requirements of land and water transportation. 8.2 The exposed processed surface of metal parts should be coated with anti-rust oil and wrapped with polyvinyl chloride plastic film. 8.3 The packaging box should be ventilated and rainproof. There should be obvious text markings on the outside and should comply with the provisions of 7.3, including: a) Name of the receiving station and the receiving unit:
b) Name of the shipping station and the shipping unit:
: c) Contract number, product name and model; 518
d) Gross weight, net weight, box number and overall dimensions, e) Center of gravity, lifting line, storage and transportation diagram JB/T 7891.1--1999
8.4 When naked, a label should be hung in a conspicuous position. The label should comply with the provisions of 7.3, and the center of gravity position should be marked on the product. 8.5 The following technical documents should be attached to the vibrating screen: a) Packing list;
b) Product certificate or quality certificate;
c) Instruction manual;
d) General drawing, installation drawing and other relevant technical data. 8.6 The vibrating screen should be placed flat and stable when stored, and should be kept at a certain distance from the ground. It should not be piled up. Outdoor storage should be protected from rain, sun and water accumulation.
8.7 The vibrating screen should be maintained once a year. 519
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