This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of vertical hydraulic pulpers (hereinafter referred to as "pulpers"). This standard is applicable to ZDSI~2 and ZDS23-29 type pulpers. QB/T 2420-1998 Vertical hydraulic pulper QB/T2420-1998 Standard download decompression password: www.bzxz.net

QB/T 2420—1998
This standard is a revision of the product standard ZBY91015—1989 "ZDS1A~2A Hydraulic Pulper". With the rapid development of my country's papermaking industry, the specifications of hydraulic pulpers are expanding and the manufacturing technology is significantly improved. There is no industry standard for new large-size vertical hydraulic pulpers. Some contents of ZBY91015 have not kept up with the development requirements. In order to meet the needs of the formulation and implementation of my country's standards, this standard unifies the product model representation and expands its technical content to ensure the manufacturing quality and performance level of the product.
From the date of implementation, this standard will replace the professional standard ZBY91015-1989 issued by the former Ministry of Light Industry. This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. The drafting unit of this standard: Shandong Jining Light Industry Machinery Factory. The main drafters of this standard: Wang Li and Guo Qingli. 317
1 Scope
Light Industry Standard of the People's Republic of China
Vertical Hydraulic Pulper
QB/T 2420--1998
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage, etc. of vertical hydraulic pulper (hereinafter referred to as "pulper").
This standard is applicable to ZDS1~2 and ZDS23~29 type pulpers. 2 Cited 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 version of the following standards. GB191--1990 Pictorial marking for packaging, storage and transportation
GB/T1958—1980 Regulations for shape and position tolerance detectionGB/T14253--1993 General technical conditions for light industrial machineryGB/T16769—1997 Method for measuring sound pressure level of noise from metal cutting machine toolsQB/T1588.4-—1993 General technical conditions for painting of light industrial machinery3 Product classification
3.1 Type
The structural type of the pulper specified in this standard has a vertical rotating shaft and can be divided into continuous type and intermittent type according to the method of use. 3.2 Model
Pulper series specification code
Pulper code
Pulping equipment code
Papermaking machinery professional code
3.3 Basic parameters
The basic parameters of the pulper are shown in Table 1.
Nominal volume, m2
Production capacity
Slurry concentration
Intermittent, t/d
Continuous, t/dwwW.bzxz.Net
Intermittent, %
Continuous, %
5~～8
Approved by the State Bureau of Light Industry on November 25, 1998
30~6050~8070~100
90～120
110~~140
230~~300
Implemented on June 1, 1999
Rotor diameter, mm
Rotor speed, r/min
Motor power, kW
Sieve hole specifications, mm
Note: The sieve hole diameter can be produced according to the agreed specifications. 4 Technical requirements
4.1 General requirements
QB/T2420—1998
$5～22
10±24
4.1.1 General requirements for pulpers shall comply with the provisions of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. 4.1.2 The manufacture of pulpers shall comply with the relevant provisions of GB/T14253. 4.2 Product performance
4.2.1 The pulper shall be able to complete the disintegration of pulp boards, damaged paper and waste paper, and its production capacity and pulp concentration shall comply with the provisions of Table 1. 4.2.2 Pulper operation performance requirements
a) There shall be no leakage at the connection between the welding parts of the tank body and the pulp level box; b) There shall be no leakage at the high-pressure sealing water joint; c) The rotor shall run smoothly at the specified speed without abnormal phenomena. 4.3 Components Processing Requirements
4.3.1 Spindle
The circular runout of the taper journal relative to the common axis of the front and rear support journals shall not exceed the requirements of Table 2. Table 2
Circular runout
4.3.2 Rotor
The rotor shall be statically balanced, and its requirements shall comply with the requirements of Table 3. Table 3
The rotor unbalance shall not exceed
Exceeding deadweight at the outer edge
4.4 Assembly Requirements
4.4.1 Assembly Requirements
All parts must be inspected and qualified, and purchased and outsourced parts must have qualified certificates before assembly. 4.4.2 The transmission part shall meet the following requirements after assembly: a) The gap between the rotor and the screen plate is 2mm~～5mm, and its variation is not greater than 1.5mm; b) The rotor rotates lightly and flexibly without jamming. 4.5 Requirements for Idle Operation
ZDS27/ZDS28
4.5.1 At the specified speed, the operation shall be stable and reliable, without abnormal noise, oil leakage at the lubrication point, and water leakage at the sealing point. 4.5.2 The noise (sound pressure level) of the pulper shall not be higher than 85dBA). 4.5.3 The temperature rise of the bearing shall not exceed 35℃.
4.6 Appearance Requirements
QB/T2420-1998
4.6.1 The appearance of the pulper shall not have any defects such as protrusions, depressions, roughness and other damages other than those specified in the drawings. 4.6.2 The edges of the assembly surfaces of the parts shall be neat and consistent without obvious misalignment. 4.6.3 The paint layer of the pulper shall comply with the relevant provisions of QB/T1588.4 if the user has no special requirements. 4.6.4 The font of the product label shall be clear and durable, arranged neatly and beautifully, and installed in the correct and firm position. 4.7 Electrical system requirements
4.7.1 The metal casing of the electrical device and the main engine should have a grounding device. The grounding terminal should be located at the wiring position and marked with a protective grounding symbol. 4.7.2 A reliable electrical connection must be ensured between the metal casing of the electrical device or the metal parts that may be energized and the grounding screw. The measured value of the connection resistance between it and the grounding screw shall not exceed 0.1Q. 4.7.3 The insulation resistance measured when 500Vd.c is applied between the power circuit conductor and the protective grounding circuit shall not be less than 1Mα. 4.7.4 The electrical insulation should be able to withstand 1000V, 50Hz AC sine wave for 1s without breakdown and flashover. 5 Test methods
5.1 The inspection of product performance is carried out by the user in accordance with the inspection specifications of the pulp and paper mill. 5.2 The circular runout is measured in accordance with the relevant provisions of GB/T1958. 5.3 The static balancing of the rotor is carried out on a guide rail static balancing frame. 5.4 The gap between the rotor and the screen plate is measured with a thickness gauge or a feeler gauge. 5.5 Idle running test
5.5.1 At the specified speed, the continuous running time shall not be less than 1h. 5.5.2 The noise is measured with a Class A sound level meter with an accuracy of 1.0 in accordance with GB/T16769. 5.5.3 The bearing temperature rise is measured on the bearing surface with a temperature measuring instrument with an accuracy of 2.5. 5.6 Electrical system inspection
Visual inspection and electrical measuring instruments and meters (such as micro-resistance tester, 500V megohmmeter, power 500VA or more withstand voltage tester, etc., the accuracy of which should not be less than 0.5 level) are used for inspection. 6 Inspection rules
6.1 The pulper must be inspected and qualified by the inspection department of the manufacturer and accompanied by a product certificate before it can be shipped. In special cases, it can also be carried out at the user's factory according to the provisions of the agreement between the manufacturer and the user. 6.2 The inspection of the pulper is divided into factory inspection and type inspection. 6.3 Factory inspection
6.3.1 Each pulper shall be inspected in the factory. 6.3.2 Factory inspection items and requirements
a) Processing and assembly quality inspection, the test method shall be carried out in accordance with 5.2~5.4, the inspection results shall comply with the provisions of 4.3 and 4.4, and the processing quality is allowed to be checked and recorded;
b) The idle running test shall be carried out in accordance with 5.5, and the inspection results shall comply with the provisions of 4.5; c) The appearance quality inspection shall be carried out by visual inspection or hand feeling method, and the inspection results shall comply with the provisions of 4.6; d) The electrical system inspection shall be carried out in accordance with 5.6, and the inspection results shall comply with the provisions of 4.7. 6.4 Type inspection
6.4.1 The pulper shall be subjected to type inspection in the following circumstances. a) When new products are trial-produced and finalized;
b) After formal production, if there are major changes in structure, materials, and processes that may affect product performance; c) After formal production, the first inspection should be carried out every two years; d) When the national quality supervision agency proposes a requirement for type inspection. 320
QB/T2420—1998
6.4.2 Type inspection items are all technical requirements of this standard. 6.5 Sampling method
Type inspection shall be sampled at 5% of the batch, but not less than two units. 6.6 Judgment rules
Within the validity period of the type inspection, if all the factory inspection items meet the requirements of this standard, they shall be qualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Each pulper shall be fixed with a product label in an appropriate and obvious position, including: a) product name, model, and standard number adopted; b) main technical parameters;
c) manufacturing date and number;
d) manufacturer's name.
7.1.2 The marking of the rotor's rotation direction shall be clearly indicated with red paint. 7.1.3 The packaging mark shall comply with the provisions of GB191. 7.2 Packaging
7.2.1 The packaging shall comply with the relevant provisions of GB/T14253. 7.2.2 The accompanying documents shall be complete, including one copy each of the product certificate, product manual and packing list. 7.3 Transportation and storage
The packaged products shall comply with the relevant regulations of the railway, land and water transportation departments during transportation. For products with special requirements, their transportation requirements shall be specified.
The products shall be stored in a dry, ventilated and rainproof place and placed stably. The products shall not rust within six months from the date of packaging. 321
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.