This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of coal dewatering screen bars. This standard applies to the screen bars of the slit screen plates and screen baskets used for dewatering, de-mediuming, desludging and grading on coal fixed screens, curved screens, filter centrifuges and other equipment. JB/T 2446-1992 Coal Dewatering Screen Bars JB/T2446-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 2446-92
Dewatering Screen Bars for Coal
Published on 1992-07-14
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on 1993-0701
Mechanical Industry Standard of the People's Republic of China
Dewatering Screen Bars for Coal
Subject Content and Scope of Application
JB/T 2446-92
Replaces JB2446-78
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of dewatering screen bars for coal.
This standard applies to the screen bars (hereinafter referred to as screen bars) of the slotted screen plates and screen baskets used for dewatering, demediation, desludging and classification on coal fixed screens, curved screens, vibrating screens, filter centrifuges and other equipment. 2
Referenced standards
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) GB 2828
3 Types and basic parameters
The types of dewatering screen bars for coal are recommended to be the types listed in Table 1. 3.1
Screen bar structure diagram
Approved by the Ministry of Machinery and Electronics Industry on July 14, 1992 mm
Screen bar cross section
Implementation on July 1, 1993
3.2 Screen bar code and marking example
3.2.1 Screen bar code
3.2.2 Marking example
JB/T 2446--92
JB/T 2446
Ring thickness S, mmwww.bzxz.net
Bar back width b, mm
Material code
Screen bar type (A, B, C)
Standard number
B-type screen bar, material is 1Cr18Ni9, screen bar back width 2.60mm, screen bar ring thickness 3.10mm is marked as: Screen bar B-1Cr18Ni9-2.60×3.10JB/T 24464Technical requirements
Screen bars should comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2
The main dimensions listed in Table 2 are recommended for the cross section of the screen bar. Table 2
4.3 The surface roughness of the back of the screen bar is
5 Test method
8°, 12°, 15°
5.1 The raw material wire for manufacturing the screen bar should have a quality certificate from the supplier. If there is no certificate, the screen bar manufacturer should inspect the raw materials and only those that are qualified can be used.
5.2 The main dimensions of the screen bar section (see Table 2) are measured with a -T scale with a scale value of 0.01mm and a vernier caliper with a scale value of 0.02mm. 5.3 The surface roughness of the back of the screen bar is visually compared with the roughness sample. 6 Inspection rules
6.1 The screen bar should be inspected before leaving the factory, and the items are: a. The main dimensions of the screen bar section should meet the requirements of Table 2; b. The surface roughness of the back of the screen bar should meet the requirements of Article 4.3; C. The raw material wire of the screen bar should have a quality certificate from the supplier or the manufacturer's physical and chemical test records of the raw materials. 2
JB/T 2446--92
6.2 The user has the right to accept the product according to this standard. The acceptance shall be carried out by one or two sampling plans, and the plan shall be in accordance with the provisions of GB2828. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 The factory products shall have a product certificate, the contents of which include: a. Product name;
Product model or mark;
Factory date or production date;
Inspection date and inspection personnel's stamp;
Manufacturer's name.
The surface of the product outer packaging shall be marked with:
Receiving station name, receiving unit;
Shipping station name, shipping number;
Product name, quantity, specifications;
d. Manufacturer's name.
7.2 Packaging
7.2.1 The outer packaging of the product can be wooden boxes or other packaging materials. 7.2.2 Each outer packaging must be accompanied by a product certificate. 7.3 Transportation and storage
7.3.1 Rain and moisture protection measures should be taken during transportation. 7.3.2 It should be stored in a dry and non-corrosive place. 8 Manufacturing guarantee
8.1 The manufacturer should ensure that the product meets the requirements of this standard when it leaves the factory. 8.2 If the user complies with the storage, transportation, installation and reasonable use rules, within 6 months from the date of shipment from the manufacturer and within 3 months of use, if the screen bar is damaged or cannot be used normally, the manufacturer shall be responsible for repairing or replacing it for the user. Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Mining Machinery. This standard is under the jurisdiction of the Luoyang Mining Machinery Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by Shanghai Mine Screen Factory. The main drafter of this standard is Zhuo Quming.
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