JB/T7891.2-1999 This standard is a revision of JB/T 7892-95 "ZKX linear vibrating screen". This standard is part of the JB/T 7891 "Vibrating screen" series of standards. This series of standards includes the following two parts: JB/T 7891.1-1999 YA circular vibrating screen JB/T 7891.2-1999 ZKX linear vibrating screen This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, labels, instructions, packaging, transportation and storage of ZKX linear vibrating screen. This standard applies to ZKX linear vibrating screen. This machine is mainly used for dehydration, desludging and dry classification of medium and fine-grained coal, and can also be used for screening of bulk materials such as ores. This standard was first issued on June 6, 1985 as GB 6064-85 and was adjusted to JB/T 7892-95 on April 14, 1996. JB/T 7891.2-1999 ZKX Linear Vibrating Screen JB/T7891.2-1999 Standard download decompression password: www.bzxz.net

JB/T 7891.2--1999
This standard is a revision of JB/T7892-95 "ZKX Linear Vibrating Screen". During the revision, the original standard was edited, and the main technical content remained unchanged.
This standard replaces JB/T7892-95 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 GB6064-85 and was adjusted to JB/T7892--95 in April 1996. 520
1 Fantu
Standard of the Machinery Industry of the People's Republic of China
ZKX Linear Vibrating Screen
Model ZKX linear vibrating screenJB/T 7891.2--1999 :
·Replace JB/T 7892-95
This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, labels, operating instructions, packaging, transportation and storage of ZKX linear vibrating screen.
This standard applies to ZKX linear vibrating screen (hereinafter referred to as vibrating screen). The machine is mainly used for dehydration, desludging and dry classification of medium and fine-grained coal, and can also be used for screening of bulk materials such as ores. 2 Reference 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. GB1911990 Pictorial signs for packaging, storage and transportation
GB/T699-1988 Technical conditions for high-quality carbon structural steelGB/T700-1988 Carbon structural steel
GB713--1997 Steel plates for boilers
GB/T1239.4-1989 Technical conditions for hot-rolled cylindrical helical springs
GB/T 6388--1986
GB 9969.1--1998
Marks for shipping and receiving of transport packaging
General provisions for instructions for use of industrial products
GB/T 10095--1988
Precision of involute cylindrical gears
GB/T 13306-1991
GB/T 13384—1992
JB/T 1604-1998
JB/T 3278--1992
JB/T 4042-1999
JB/T 5496—1991
JB/T 9032--1999
3 Product classification
General technical conditions for packaging of electromechanical products
Model compilation method for mining machinery productswwW.bzxz.Net
Welded slit screen plate
Test method for vibrating screen
General technical conditions for vibrating screen manufacturing
Metal woven screen for mining
3.1 Vibrating screen can be divided into seat-type or hanging-type installation, and the motor can be installed on the left or right, as shown in Figure 1. Approved by the State Machinery Industry on June 28, 1999, and sold on January 1, 2000
JB/T7891.2-1999
3.2 The model representation method of the vibrating screen shall comply with the provisions of JB/T1604. 口
Screen box length, dm
Screen box width, dm
Box vibrator
Block eccentricity
Linear vibrating screen
Number of layers, single layer
3.3 The basic parameters of the vibrating screen shall comply with the provisions of Table 1. $22
JB/T 7891.2-1999
00g0a8~
~50 0'09~00
~0100s~
1~50005~5\00\91~9\00\059'00\1~0]o~
009 009 1
009m006
Motor cable
JB/T 7891.2-1999
00000~90000m
06°0～
'09~90
0096008
Electric Motor Cable
Sheng Buried
4 Technical Requirements
JB/T 7891.2—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 Outsourced and purchased parts shall have a certificate of conformity, and may 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) Prevent the bolts from loosening;
d) Under normal working conditions, the material will 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 of the two side plates of the screen box shall not exceed 0.5mm, and the lateral swing shall not exceed 1mm c) The operation is stable and flexible, without jamming, d) The bearing temperature rise shall not exceed 40C, and the maximum temperature shall not exceed 75C: e) The no-load noise shall not exceed 90dB (A); f) The screen plate shall be firmly fixed on the screen frame, and there shall be no secondary vibration; g) The height error of the symmetrical point spring after the vibrating screen is assembled shall not exceed 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 plates 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 1mm per meter;
c) The crossbeam shall not be spliced ​​in the vertical direction;
d) The tensile strength of the ring groove rivet shall not be less than 800N/mm, and the nail sleeve material shall meet the mechanical property requirements of 10 steel in GB/T699, and shall be passivated.
4.6 The slit screen plate shall meet the requirements of JB/T3278, and the woven screen shall meet the requirements of JB/T9032. 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) The vibrator shall use bearings with increased clearance. After cleaning, the cleanliness of the housing and other parts shall not exceed 350mg. The lubricating oil of the specified brand shall not have oil leakage, and the axial play of the transmission shaft shall not exceed 0.7~~~~2.2mm: b) The vibrator parts shall not have cracks and other visible defects, and the rotating parts shall not be repaired by welding. c) The gear accuracy shall comply with the provisions of 8-7-7GJ in GB/T10095. 4.9 The painting shall be uniform + the paint surface shall not have defects such as cracks, peeling and flow marks. 4.10 Scope of supply of complete set of vibrating screen:
a) Main part of vibrating screen;
b) Motor and motor seat;
c) V-belt;
d) Protective cover of rotating parts:
e) Support device:
, f) Vibrating screen chassis (user optional parts); g) Spare parts provided according to the order contract.
5 Test method
JB/T 7891.2-1999
The test method of vibrating screen shall comply with the relevant provisions of JB/T4042. 6 Inspection rules
6.1 Inspection classification
The inspection of vibrating screen is divided into factory inspection and type inspection. 6.2 Factory inspection
6.2.1 Each vibrating screen shall be inspected and qualified by the manufacturer before it can be shipped, and the documents proving the qualified quality of the product shall be attached when it leaves the factory. 6.2.2 The factory inspection is carried out at the manufacturer, and the following items are inspected after idling for 4 hours: a) Amplitude;
b) Vibration direction angle;
c) Noise;
d) Vibration frequency;
e) Maximum temperature of vibrator bearing and bearing temperature rise; f) Amplitude difference between symmetrical points of the two side plates;
g) Lateral swing of the screen box.
6.3 Type inspection
6.3.1 The vibrating screen should be type inspected when any of the following situations occurs: a) When new products or old products are transferred to the factory for production; b) After formal production, there are major changes in structure, materials, and processes that may affect product performance; c) During normal production, an inspection should be carried out every 3 years or every 50 units produced; d) When production is resumed after a long period of suspension;
e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a type inspection requirement. 6.3.2 The type inspection items shall include all the requirements of this standard. 6.3.3 The type inspection shall be carried out by randomly selecting one product from the qualified products of the factory inspection. If the inspection fails, double sampling shall be carried out. 7 Marking, label and instruction manual
7.1 Each vibrating screen shall be fixed with a product label in an appropriate and obvious position. The label shall comply with the provisions of GB/T13306 and indicate the following contents:
a) Manufacturer's name;
b) Product name and model:
c) Main technical parameters;
d) Production date and export number.
7.2 The product instruction manual shall be written for the vibrating screen, and 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 graphic 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 and V-belts, which are sealed, the rest can be wrapped or packed. The packaging boxes and packages shall comply with the requirements of land and water transportation. 8.2 The exposed processing surface of metal parts shall be coated with anti-rust grease and wrapped with polyvinyl chloride plastic film. 526
JB/T 7891.2—1999
8.3 The packaging box should be ventilated and rainproof, and the outer wall should have obvious text markings, and should comply with the provisions of 7.3, including: a) The name of the receiving station and the receiving unit;
b) The name of the shipping station and the shipping unit;
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 diagram. When the product is unpacked, 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 vibrating screen should be accompanied by the following technical conditions: 85
a) Packing list
b) Product certificate or quality certificate:
|) Product instruction manual;
d) Product installation drawing and other relevant technical information. 8.6 When storing, the vibrating screen should be placed flat and stable, and kept at a certain distance from the ground. Do not pile it up. When storing it outdoors, it must be protected from rain, sun and water accumulation.
8.7 The vibrating screen should be maintained once every year. 52Y
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