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DL/T 1963-2019: High amplitude vibrating screen
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High amplitude vibrating screen
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DL/T 1963-2019
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Basic data | Standard ID | DL/T 1963-2019 (DL/T1963-2019) | | Description (Translated English) | High amplitude vibrating screen | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | F29 | | Classification of International Standard | 27.100 | | Word Count Estimation | 14,163 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Quoted Standard | GB/T 191; GB/T 699; GB/T 700; GB/T 1184-1996; GB/T 1231-2006; GB/T 5226.1; GB/T 5817; GB/T 6388; GB/T 8923.1-2011; GB/T 13306; GB/T 13384; GB/T 23934; GB/T 25290; JB/T 4042; JB/T 5000.3; JB/T 5000.6; JB/T 5000.12; JB/T 5000.13; JB/T 5496; JB/T 9032 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | | Summary | This standard specifies the classification, technical requirements, test methods, inspection regulations, marking, packaging and transportation of high-amplitude vibrating screens. This standard applies to the design, manufacture and acceptance of high-amplitude vibrating screens. | DL/T 1963-2019: High amplitude vibrating screen---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
High Amplitude Vibrating Screen
ICS 27.100
F 29
People's Republic of China Electric Power Industry Standard
High-amplitude vibrating screen
Refractory materials for boilers in thermal power plants
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Basic requirements for product classification...2
5 Technical requirements...4
6 Test method...5
7 Inspection rules...5
8 Marking, packaging, transportation and storage...6
Appendix A (normative appendix) Test method of screening efficiency...8
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009 "Guidelines for Standardization Work Part 1.Standard Structure and Compilation".
Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Electric Power Industry Standardization Technical Committee for Coal-fired Machinery.
The organization responsible for drafting this standard. Henan Weimen Vibration Equipment Co., Ltd., Sichuan Baima Circulating Fluidized Bed Demonstration Power Plant Co., Ltd.
Division, Power Industry Product Quality Standard Research Institute.
The main drafters of this standard. Wang Simin, Zhang Guoyun, Ma Rupo, Cao Xiuguo, Men Xing, Zhou Shikong, Huang Yongbin, Han Limin, Zhou Yanli.
This standard is formulated for the first time and will be implemented from the date of initiation.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of China Electricity Council (No. 2 Baiguang Road, Beijing)
No. 1, 100761).
High-amplitude vibrating screen
1 Scope
This standard specifies the classification, technical requirements, test methods, inspection regulations, marking, packaging and transportation of high-amplitude vibrating screens.
This standard applies to the design, manufacture and acceptance of high-amplitude vibrating screens.
2 Normative references
The following documents are indispensable for the application of this standard. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 191 Packaging, storage and transportation pictorial signs
GB/T 699 High-quality carbon structural steel
GB/T 700 carbon structural steel
GB/T 1184 shape and position tolerance without tolerance value
GB/T 1231-2006 Technical requirements for high-strength large hexagon head bolts, large hexagon nuts and washers for steel structures
GB/T 5226.1 Electrical Safety of Machinery Electrical Equipment of Machinery Part 1.General Technical Conditions
GB/T 5817 Classification of hazard degree of productive dust operation
GB/T 6388 Receipt and Delivery Marks for Transport Packaging
GB/T 8163 Seamless steel pipe for conveying fluid
GB/T 8923.1-2011 Visual assessment of surface cleanliness of steel surface treatment before coating-Part 1.Uncoated steel
The corrosion grade and treatment grade of the surface and the steel surface after the original coating has been completely removed
GB/T 9969 General Rules for the Use of Industrial Products
GB/T 11384 General technical conditions for packaging of mechanical and electrical products
GB/T 13306 signs
GB/T 23934 Hot-wound cylindrical coil spring compression spring technical conditions
JB/T 4042 Vibrating screen test method
JB/T 5000 General technical conditions for heavy machinery
JB/T 5496 General technical conditions for vibrating screen manufacturing
JB/T 9032 Mining metal weaving screen
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
High amplitude vibrating screen
The vibration exciter at the lower part of the screen surface is driven by the motor, and a circular orbit vibration screening equipment with a diameter of 15-25mm is made on the vibration damping device.
The motor can be installed on the left or right, and is mainly used for particle size classification of coal-burning materials such as electricity, coal, and chemical industries. see picture 1.
3.2
Vibrator
The eccentric mass rotates to generate exciting force, and this exciting force can be applied to other structures and equipment to produce regular vibration devices.
3.3
Bin under screen
The silo is a funnel-shaped shell that accepts and transfers materials.
3.4
Eccentric mass
The unbalanced mass that generates periodic simple harmonic vibration through rotation.
3.5
Amplitudes
One half of the vibration stroke of the screen surface. When the vibration track is circular, the amplitude is equal to the radius of the circular track.
3.6
Vibrating frequency
The number of vibrations of the screen surface per second.
3.7
Screening efficiency
The sum of the positive mixing efficiency of coarse particles and the positive mixing efficiency of fine particles is reduced by 100.
4 Basic requirements for product classification
The high-amplitude vibrating screen is divided into coarse screen and fine screen according to the discharge particle size.
4.1 Model
High-amplitude vibrating screen model.
4.2 Structure
The structure of the high-amplitude vibrating screen is shown in Figure 1.
4.3 Basic parameters
The basic parameters of high-amplitude vibrating screen are shown in Table 1 and Table 2.
5 Technical requirements
5.1 The manufacturing technology of the high-amplitude vibrating screen shall meet the requirements of JB/T 5496, and shall be carried out in accordance with the drawings and technical documents approved by the prescribed procedures.
manufacture.
5.2 The structure of the high-amplitude vibrating screen should meet the following requirements.
a) The wearing parts of the same model of high-width vibrating screen should be interchangeable.
b) The joint surfaces and soft joints are tightly sealed and no dust should leak.
c) The vibration exciter bearing is sealed reliably and should be able to prevent dust from entering the bearing without oil leakage.
d) The eccentric block of the exciter is equipped with an adjustable weight, and the excitation force is adjustable.
e) Vibrate the screen through the vibration exciter, and the screen box does not participate in the vibration.
f) The top cover can be opened for easy maintenance.
g) The processing capacity should meet the label requirements.
5.3 High-quality carbon structural steel parts should meet the requirements of GB/T 699.
5.4 Ordinary carbon structural steel parts should meet the requirements of GB/T 700.
5.5 Cast iron parts should meet the requirements of JB/T 5000.6.
5.6 Welding shall comply with the requirements of JB/T 5000.3, and the surface shall be smooth and free of defects such as pores, slag inclusions, and cracks.
5.7 When there are no special regulations in the product drawings or design documents, the surface treatment before painting should meet the Sa2.5 specified in GB/T 8923.1-2011
The coating should meet the requirements of JB/T 5000.12.
5.8 The main shaft of the exciter should be made of 40Cr material, which should be quenched and tempered and subjected to non-destructive testing.
5.9 The thickness of the box steel plate shall not be less than 6mm.
5.10 The wall thickness of the middle tube beam of the exciter shall not be less than 16mm.
5.11 Before assembling the high-width vibrating screen, all parts shall be inspected to be qualified. The purchased parts and standard parts shall have a certificate of conformity or an on-site inspection certificate.
Can be assembled.
5.12 Before assembling the eccentric block of the exciter, a static balance test shall be carried out, and the allowable eccentric angle shall comply with the value specified in Table 3.
5.13 The mass difference of the eccentric block on the coaxial axis of the exciter should not be greater than 0.15kg, and the mass difference of any two eccentric blocks on the same equipment should not be large.
In 0.2kg.
5.14 The exciter should use a fixed brand of lubricating oil. After the lubricating oil is filtered by a 120-mesh filter, the residual dirt should not exceed 380mg.
5.15 There should be no welds perpendicular to the axis of the tube beam on the tube beam of the exciter.
5.16 After assembly, the vibration exciter should be flexible to rotate, and its axial clearance should be 1.5mm~2mm.
5.17 The flatness error of the bottom bracket after forming should not be greater than 2mm per square meter, and the equal length tolerance of the two diagonals of the bottom bracket should not be greater than every 1000mm
1mm.
5.18 The equal height tolerance of the symmetrical spring lower bracket should not be greater than 3mm.
5.19 The equal-length error of the two diagonals after each sieve plate is formed shall not be greater than 1mm per 1000mm.
5.20 The flatness error of the sieve tray fixed on the tube beam of the exciter should not be greater than 2mm per square meter after forming.
5.21 The error of the equal length of the two diagonals of the screen core shall not be greater than 1mm per 1000mm.
5.22 The coaxiality tolerance of the center line of the two bearing housing holes of the vibration exciter should meet the level 6 precision of GB/T 1184 with the maximum distance between the two coaxial holes as the main parameter.
Degree requirements.
5.23 The main supporting parts shall meet the following requirements.
a) The performance of high-strength bolts should meet the requirements of Class 8.8 in GB/T 1231-2006.
b) The string sieve plate should meet the requirements of JB/T 9032.
c) The spring should meet the requirements of GB/T 23934.
d) The motor should meet the requirements of GB/T 25290.
5.24 The performance of the whole machine should meet the following requirements.
a) The vibration frequency deviation should not exceed 2.5% of the specified value.
b) All parts of the mechanical part should be stable, flexible, free from jamming, and no loose fasteners during operation.
c) The bearing temperature rise should not exceed 50℃, and the maximum temperature should not exceed 85℃.
d) No-load operation noise should not exceed 85dB (A).
e) The amplitude of the high-amplitude vibrating screen should be 15mm～25mm, and the amplitude deviation of the corresponding points on both sides of the same screen core should not exceed 1mm.
Compared with the amplitude of the feeding end on the same side, the amplitude deviation value shall not exceed 10%.
f) After assembly, the spring net compression equal height error of the two symmetrical points should not be greater than 5mm.
5.25 Safety and environmental protection shall meet the following requirements.
a) The exposed rotating parts of the high-amplitude vibrating screen should have safety protection devices.
b) The safety requirements of electrical equipment for high-amplitude vibrating screens should meet the requirements of GB/T 5226.1.
c) The dust concentration around the high-amplitude vibrating screen should meet the requirements of GB/T 5817.
d) After the dry running, the screen plate and hoop bolts should be tightened twice.
6 Test method
6.1 The test method of high-amplitude vibrating screen should meet the requirements of JB/T 4042.
6.2 See Appendix A for the calculation method of screening efficiency.
7 Inspection rules
7.1 Inspection classification
The inspection of high-amplitude vibrating screen is divided into factory inspection and type inspection. The factory inspection items and type inspection items are specified in Table 4.
7.2 Factory inspection
Each high-amplitude vibrating screen must be inspected and qualified by the quality inspection department of the manufacturer, and the inspection report, instruction manual and factory qualified shall be attached.
Certificates and so on before leaving the factory.
7.3 Type inspection
In case of one of the following conditions, the high-amplitude vibrating screen should undergo type inspection.
a) Trial production, finalization and identification of new products;
b) After formal production, there are major changes in product structure, materials or processes that may affect product quality;
c) During normal production, an inspection shall be carried out every 3 years;
d) When production is stopped for 1 year and production is resumed;
e) The factory inspection results are quite different from the last type inspection;
f) When the national quality supervision agency puts forward a request or the users feedback a lot of problems.
7.4 Sampling
The prototype of the type inspection shall be a prototype of a new product trial production or a randomly selected one from the production batch of the month (season) under inspection.
7.5 Judgment rules
7.5.1 The factory inspection items are as specified in Table 4, and only if 100% of the indicators meet the requirements are qualified.
7.5.2 The type inspection items are as specified in Table 4, and only if 100% of the indicators meet the requirements are qualified.
8 Marking, packaging, transportation and storage
8.1 Logo
8.1.1 Each product should have a product label fixed in an obvious position, and its type and size should comply with the provisions of GB/T 13306.The label should include the following
Column content.
a) The name of the manufacturer;
b) Product model and name;
c) Main technical parameters;
d) Date of delivery;
e) Factory number.
8.1.2 The packaging mark of the high-amplitude vibrating screen shall meet the requirements of GB/T 6388 and GB/T 191.Its contents include.
a) Contract number, product name and model;
b) Manufacturer and factory number;
c) The name and address of the receiving unit;
d) Net weight, gross weight, box number and overall dimensions;
e) Lifting operation signs and storage and transportation pictorial signs.
8.2 Packaging
8.2.1 The packing box and package parts should conform to GB/T 11384, JB/T 5000.13 or contractual agreement.
8.2.2 Motors, springs, disassembled bolts and structural parts should be packed, naked or bundled according to the packing list.
8.2.3 The exposed processed surface of the metal should be coated with anti-rust oil and wrapped with a film.
8.2.4 Accessories shipped randomly should be packed in the box.
8.2.5 The packaging of export products should meet the relevant requirements of foreign trade export orders.
8.2.6 The accompanying documents should be packed in plastic bags and stored in the box, or sent to users by mail. The documents should include.
a) Packing list;
b) Product certificate and factory inspection report;
c) Product instruction manual;
d) Installation drawing.
8.3 Transportation
The transportation of the high-amplitude vibrating screen should comply with the regulations of the railway, highway and water transportation departments.
8.4 Storage
The high-amplitude vibrating screen components should be stored flat and stable, kept a certain distance from the ground, and cannot be stacked. When stored in the open air, it should be protected from rain and sun
And measures to prevent accumulation of water.
Appendix A
(Normative appendix)
Testing method of screening efficiency
A.1 Introduction
To determine the screening efficiency, follow the recommended experimental method below. Before the test, the measurement should be filled in according to the requirements of Table 1, Table 2, and Table 3.
Calculate the screening efficiency according to the formula of screening efficiency.
A.2 Suggested method for calculating screening efficiency based on particle size analysis
A.2.1 Symbols
Si-screening efficiency (comprehensive separation index), %;
Ec-the positive distribution efficiency of coarse particles, %;
Ef-the positive distribution efficiency of fine particles, %;
γf,t--Theoretical yield of fine particles (under sieve), %;
γc,t--theoretical yield of coarse grain (on the sieve) product, %;
Mc--the percentage of the fine particles in the coarse (on the sieve) product to the feed, %;
Mf-the percentage of coarse particles in the fine particles (under the sieve) product to the feed, %.
A.2.2 Calculation method of screening efficiency
The screening efficiency is included in the screening equipment performance report (Table 3) as an evaluation index. The calculation method is as follows.
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