JB/T 9031-1999 JB/T 9031-1999 Mining perforated screen plate JB/T9031-1999 Standard download decompression password: www.bzxz.net

JB/T9031--1999
This standard is a revision of ZBD95002-88 "Piercing Screen Plate for Mining". During the revision, the original standard was edited, and the main technical content remained unchanged.
This standard replaces ZBD95002-88 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. 545
1 Range
Standard of the Machinery Industry of the People's Republic of China
Perforated screen plate for mine
Perforated screen plate for oreJB/T 9031-—1999
Replaces ZBD95002—88
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of perforated screen plates for mines. This standard is applicable to metal perforated screen plates for screening various minerals. 2 Product classification
2.1 Perforated screen plates are plates with holes and any external dimensions. 2.2 The hole types of the screen plate are round holes, square holes and long holes. 2.3 The arrangement of the holes of the screen plate is as follows:
a) staggered arrangement (see Figure 1, Figure 2, Figure 4, Figure 5, Figure 7, Figure 9); b) regular arrangement (see Figure 3, Figure 6, Figure 8, Figure 10). More
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National Machinery Industry Bureau approved 546 on 1999-06-28
China Electric Power
China Electric Power
China Electric Power
China Electric Power
China Electric Power
China Electric Power
2000-01-01implemented
2.4 The model representation method is as follows:
JB/T 9031—1999
-Plate thickness, mm
tt
tt
tt
tt
tt||-Hole spacing (long hole is t/t2), mm
-Sieve hole size (long hole is L/L), mm-Arrangement: staggered arrangement is J, regular arrangement is G Hole type code: square hole is F, long hole is C, round hole is slightly punched sieve plate
2.5 Basic parameters of sieve plate:
JB/T 9031--1999
a) The basic parameters of the round hole sieve plate shall comply with the provisions of Table 1; b) The basic parameters of the square hole sieve plate shall comply with the provisions of Table 2; c) The basic parameters of the long hole sieve plate shall comply with the provisions of Table 3; d) The sieve hole size should preferably be selected from the first series; e) If there is a special purpose, the hole spacing can be selected within the range of ±15%, f) The plate thickness is the maximum thickness.
First series
Second series
Measurement length
Relative opening rate A.
First series
Second series
JB/T 9031—1999
Table 1 (continued)
Deviation of measuring length
Relative porosity Ac
Aperture D
First series
Second series
JB/T 9031--1999
Table 1 (end)
Deviation of measuring length
Relative porosity A.
Aperture W
First series
Second series
JB/T9031--1999
Aperture distance'
Deviation of measuring length
Relative porosity A.
First series
Second series
—1, 00
JB/T9031-1999
Table 2 (end)
[Measurement length deviation
125.00±4.00
Relative opening rate Ac
JB/T9031--1999bZxz.net
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009k
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09°0-
JB/ T9031-1999
4—59
248-43
8543-253
089 thousand
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00°99||tt ||08°0+
09°0+||tt ||00°08
2.6 The width of the non-porous edge shall meet the following requirements: JB/T9031—1999
a) The standard non-porous edge width is generally 40mm, or 40mm plus a hole distance. For the bent and tensioned sieve plate, the size of the bent part is not included.
b) The non-standard non-porous edge width shall be subject to user requirements. 3 Technical requirements
3.1 The punched sieve plate shall meet the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 3.2 The tensile strength of the sieve plate material shall not be less than 392N/mm2. 3.3 The surface of the sieve plate shall be flat and no defects that affect its use shall be allowed. Defects that occur during punching shall be repaired by welding, and the cumulative repaired surface shall not exceed 4% of the entire surface.
3.4 ​​The maximum fillet radius of square holes and long holes is calculated according to formula (1): rmax = 0. 05W+0. 3
Wherein: rmax
Maximum fillet radius;
Nominal size of the sieve hole (L is the long hole). The length and width deviations of the sieve plate shall comply with the provisions of Table 4. 3.5
>30～100
>100～300
The width deviation of the non-hole edge of the sieve plate shall comply with the provisions of Table 5. Hole spacing t
>5～20
4 Test method
4.1 The size and hole spacing of the sieve hole shall be tested on the hole surface. >300～1000
1 000~2 0002 000-4 000
（1）
>4 000
4.2 Use a feeler gauge and a vernier caliper to measure the size and hole spacing of the sieve holes that are not larger than 10mm, and use a vernier caliper to measure the size and hole spacing of the sieve holes that are larger than 10mm.
4.3 Visually inspect each hole and conduct an overall inspection of the sieve plate. 4.4 The measurement method of the sieve holes is as follows:
a) Select any area on the sieve plate and inspect along two straight lines in different directions. Small holes (D or W ≤ 16mm are small holes) are controlled by length, and each straight line is at least 100mm long; large holes (D or W 16mm are large holes) are controlled by the number of holes, and the number of holes should be no less than five. b) The angle between the two straight lines is 90° or 60° for circular holes and 90° for square holes. Square holes can be inspected only along the diagonal of the hole, but the length should be no less than 150mm, and there should be no less than eight holes, see Figure 11. c) If the screen plate under inspection does not meet the specified length and number of holes in one direction, all the screen holes should be inspected. 555
5 Inspection rules
JB/T9031--1999
5.1 The basic parameters of the screen plate shall comply with the provisions of Table 1, Table 2 and Table 3. 5.2 The surface quality of the screen plate shall comply with the requirements of 3.3. 5.3 The length and width deviation of the screen plate shall comply with the requirements of 3.5. 5.4 The width deviation of the non-porous edge of the screen plate shall comply with the requirements of 3.6. 6 Marking, packaging, transportation and storage
6.1 The screen plate should be wrapped or placed in a packaging box. The wrapping and packaging box should be clearly marked, including: a) Manufacturer name;
b) Product name and model;
c) Factory date and number.
6.2 The wrapping and packaging box should meet the requirements of land and water transportation. 6.3 The packing list, product certificate and other technical documents should be attached. 6.4 The sieve plate should be stored indoors, flat and stable, and at a certain distance from the ground. If it is stored outdoors, it should be protected from rain, wind and water accumulation.
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