Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2474-93
Spiral Cone Mixer
Published on 1993-06-30
Implemented on 1994-01-01
Published by the Ministry of Chemical Industry of the People's Republic of China 1 Subject Content and Applicable Model
Chemical Industry Standard of the People's Republic of China
Spiral Cone Mixer
HG/T 2474--93
This standard specifies the design, manufacture, test, inspection, acceptance, marking, packaging, storage and transportation requirements of spiral mixers. This standard is applicable to conical mixers (hereinafter referred to as "mixers") for mixing powder (granular) materials under pressure. 2 Reference standards
GB5676
GB9439
3 Design
Technical requirements for high-quality carbon structural steel parts
Technical requirements for high-quality carbon structural steel thick plates
Technical requirements for ordinary carbon structural steel and low-alloy structural steel thin platesTechnical requirements for stainless acid-resistant steel castings
Technical requirements for alloy structural steel
Technical conditions for thick steel plates of carbon steel and low alloy structural steel
Simple method for determining sound power level of noise source
Stainless steel hot rolled steel
Carbon steel for general engineering
Gray cast iron
Precision of sprocket and hypoid gear
3.1 The structure of mixer should be compact and reasonably laid out. The mixer can be divided into double spiral cone, cantilever asymmetric double spiral, single spiral cone and other forms according to the structural characteristics. The structure is shown in Figure 1, Figure 2, Figure 3
Ministry of Chemical Industry of the People's Republic of China, 1993-06-30, 1994--01-01 Implementation
247493
National 1 Double screw mixer
HG/ T 2474-93
2 Cantilever asymmetric double screw mixer HG/T 2474-93
3 Single screw conical mixer
Basic parameters should comply with the provisions of Table 1
Nominal volume
HG/T 2474-93
【rotation/revolution）r/min
60-120 /2~5
60～120 / 2~5
60~120/2~5
60 ~80 / 2 ~ 5
60 ~B0 / 2~ 5
60-80/2~5
Total motor power
The average density is not more than 1100kg/blood and the relative coagulation degree of air is not more than 85%. The machine should be able to work normally under the conditions of material particle size of 40~1000mm and the screw speed should not be less than 97% of the rated speed of the machine, and the relative coagulation degree should not be less than 97%. 3.4 The rotation and revolution of the machine should be protected by action interlocking. 3.5 Model indication method
3.3.1 The mixer model consists of five parts: product code, structural feature code, nominal volume, material code of the part in contact with the mixed materials, and modification code. The specific indication method is as follows: 口口口口口口
Modification code
Material code of the part in contact with the mixed materials Nominal volume (㎡\)
Structural feature code
Product code 35.2 Product codes are represented by capital Chinese phonetic letters LH (L-screw, H-mixed), and structural feature codes are represented according to the provisions of Table 2 and Table 3. 3.5.3
Double helix flag
Double helix arm asymmetric type
Grid features
Ordinary type
Straight type
Jacketed charge
Liquid addition type
3.5.4 Nominal volume Indicated by Arabic numerals, Table 3
First digit code
Second digit code
Not indicated
3.55 Material code for the part in contact with the composite material, carbon steel is not indicated, stainless steel is indicated by N, HG/T2474-93
3.5.6 When the structure or performance of the filter press has significant changes, the modification code shall be added to the end of the original model in sequence with letters A, B, C respectively to indicate the difference.
35.7 Marking example
Heavy-duty twin-screw mixer, nominal volume 4m3, parts in contact with mixed materials are made of stainless steel, first modification design LHSK4NA
Twin-screw cone mixer
3.6 In addition to meeting the requirements of this standard, the combined machine shall also be manufactured in accordance with product drawings and technical documents approved through prescribed procedures. 37 Materials
371 The materials of the main parts of the mixer shall meet the following requirements and shall be accompanied by a material inspection certificate. 3.7.1.1 Chain iron parts shall meet the requirements of GB9439: 37.1.2 Final steel parts shall meet the requirements of GB2100 or GB5676; 37.1.3 Shaft parts shall meet the requirements of GB699 and GB3077; 37.1.4 Plate parts shall meet the requirements of GB912, GB3274, GB711, GB3280 and GB4237. 372 For mixers used in food and pharmaceutical industries, the materials of the parts in contact with materials shall meet the requirements of relevant national food and pharmaceutical standards.
3.73 The materials of components such as gauge machines may be replaced by other grades of materials with similar or better performance, but the relevant design department must agree. 4. Manufacturing and assembly
4.1 All supporting parts and purchased parts shall meet the requirements of the corresponding product standards and shall have product certificates. 4.2 The weld surface shall not have defects such as cracks, pores, isolated pits and slag inclusions, and shall not have slag and flying objects. 4.3 The bright body coal should be smoothly plated with the parent material, and no obvious irregular shape is allowed. 4.4 The edge welds between the rotating blades should be ground to be smooth. 4.5 The manufacture of bevel gears should comply with the requirements of GB11365, and the accuracy level should not be lower than 8C. 4.6 The manufacturing quality of the cylinder should comply with the provisions of Table 4. Table 4
The upper and lower flanges and the vertical seat of the cylinder centerline
The pressure of each sugar surface of the cylinderWww.bzxZ.net
The coaxiality of the upper and lower flanges after combination ()
21.5/1000
The distance between the spiral blade of the screw and the inner wall of the cylinder should comply with the provisions of Table 5. Model
≤2/1000
≤2.5/1000
The clearance between the bottom surface of the hinge seat and the flange surface of the discharge port is 5±2mm. 4.8
4 There shall be no oil leakage at the seals of the reducer and each transmission part, and the moving parts shall rotate flexibly without abnormal sound. Test and test method
5.1 Visual inspection of the appearance quality of the welds and bright body welds between the spiral blades shall meet the requirements of 4.2, 4.3, and 4.4. 6
52 Idle running test
HG /T 2474-93
After each mixer is assembled and qualified, the continuous idle running time shall not be less than 4h, and shall meet the following requirements:. The mixer shall run smoothly and reliably without abnormal sound, and the noise (sound power level) shall not be greater than 100dB (A); b. The bearings of the motor and reducer shall operate well, and the temperature rise shall not be greater than 35; c. The temperature rise of the motor and reducer shall not be greater than 45t;. The bearings, reducers and gears shall be well lubricated without leakage or seepage;. The speed of the screw (rotation and revolution) shall meet the requirements of Table 1: f. All fasteners and connectors shall be connected reliably and without looseness. 5.3 Load operation test
5.3.1 The load operation test can be carried out only after the idle operation test is passed. 5.3.2 The mixer shall be started with an empty vehicle, and quartz sand with a diameter of 400~600um shall be added in batches as test materials. The loading coefficient is in accordance with the provisions of Table 1. The continuous operation time shall not be less than 4h and shall meet the following requirements: It shall meet the requirements of Article 52;
b. The discharge width is flexible and the leakage of powder (granular) materials shall not exceed 10m/1 within 4 hours. c. The double sealing of each sealing element is in good condition. d. The speed of the tender rod shall meet the requirements of Article 3.2. 3.4 The speed measurement adopts a non-contact tachometer to measure the spindle speed. The measuring point should be on the output shaft of the reducer, on the spindle or on the parts that are sharply connected to the spindle.
5.5 The measuring point of the bearing temperature is at the center plane of the bearing. Generally, the bearing's distance is directly measured; if the bearing temperature cannot be measured directly, the temperature at the bearing oiling hole or the bearing seat surface is measured. Measure after the bearing temperature rise is stable or after the mixer has been running continuously for not less than 2h. The measuring instrument adopts a point thermometer.
5.6 The determination of the medium sound of the mixer shall be in accordance with the provisions of GB3768. 6 Inspection and testing
61 The mixer shall be inspected and certified by the manufacturer’s quality inspection department and a certificate of conformity shall be issued. 6.2 The inspection of the mixer is divided into factory inspection and type inspection. 6.2.1 Factory inspection
The factory inspection items and requirements shall be in accordance with the provisions of Articles 4, 5.2 and 5.3. 6.2.2 Type inspection
Type inspection items and requirements shall be in accordance with the provisions of 3.2, 3.3, 3.63.7, 5.2, 5.3. 6.2.3 Factory inspection shall be carried out on a unit-by-unit basis. Type inspection shall be randomly selected from qualified products of factory inspection, with no less than 2 units of each type. 6.2.4 Type inspection shall be carried out in any of the following circumstances: When the product is trial-produced, finalized, or adjusted:
b. There are major changes in design, materials, or processes; When production is resumed after twelve months of suspension; d. When normal production time reaches twenty-four months; e. When there is a big difference between the factory inspection result and the last type inspection result: 1. When the national quality supervision agency puts forward the type inspection requirement, 6.3 Inspection rules judgment
6.3.1 Each mixer shall be inspected according to Article 6.2.1. If any inspection data does not meet the requirements, the mixer shall be judged as unqualified for factory inspection.
HG /T 2474--93
6.3.2 When the type inspection meets the requirements of Article 6.2.2, the type inspection shall be judged as qualified. If one item does not meet the requirements, the type inspection shall be judged as unqualified.
Marking, packaging, storage and transportation
7.1 Marking
7.1.1 In addition to the requirements of the drawings, the paint on the outer surface of the mixer shall be even, flat, smooth and firm, without obvious flow marks, and the surface shall be free of defects such as cracking, wrinkles, bubbles, spots and adherent particles and impurities. 7.1.2 The cylinder should be marked with a feeding limit line; the reducer should indicate the direction of rotation. 7.1.3 Each mixer should have a product label fixed at the display position. The label should comply with the requirements of GB/T13306 and include the following:
. Product name, model;
b. Main technical parameters:
Nominal volume
Motor power
Dimensions (total height × diameter)
t, manufacturing date and number;
dManufacturer name.
1.2 Packaging
7.2.1 The documents provided with the machine should be packed in a plastic film bag and packed into the packaging box together with the product. The packaging box should comply with the requirements of JB2795.
7.2.2 The outer wall of the packaging box should be marked with the following:
b. Receiving unit, address;
Product name, model, factory number:
c. Dimensions, gross weight;
Shipping unit, address.
7.2.3 Random documents
Packing list;
b Product quality certificate:
c. Product instruction manual
7.3 Storage and transportation
The filter should be placed in the packaging box according to the requirements of Article 7.2.1 and stored in a deactivated and ventilated warehouse with a relative humidity of no more than 85%, a temperature lower than 40°C, and no corrosive media; when stored outdoors, protective measures should be taken. Severe turbulence should be avoided during transportation, as shown in the following instructions:
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by Hangzhou Chemical Machinery Factory. The main drafters of this standard are: Xiang Yuan and Ding Jie.
People's Republic of China
Chemical Industry Standard
Spiral Dimensional Wave Laminating Machine
HG /T. 2474-93
China National Chemical Equipment Corporation
100011
Postal Code
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
880×12301/16
First edition in June 1994
No reproduction
15,000 words
First printing in June 1994
Price 3.40 yuan
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