This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of vacuum rolls for papermaking machines. This standard applies to various vacuum rolls for papermaking machines, including vacuum couch rolls, vacuum suction rolls and vacuum press rolls (hereinafter collectively referred to as products). QB/T 1422.2-1991 Technical conditions for vacuum rolls of common components of papermaking machinery QB/T1422.2-1991 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
General Parts of Papermaking Machinery
Subject Content and Scope of Application
Technical Conditions for Vacuum Rollers
QB/T1422.2-1991
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of vacuum rolls for papermaking machines. This standard applies to various vacuum rolls for papermaking machines, including vacuum couch rolls, vacuum suction rolls and vacuum press rolls (hereinafter collectively referred to as products).
2 Reference standards
GB 191
Packaging storage and transportation pictorial signs
GB/T 1176
Technical conditions for cast copper alloys
GB/T2100Technical conditions for stainless acid-resistant steel castingsGB/T6388Transport packaging delivery and receipt signs
GB/T9897Technical conditions for papermaking rubber rollers
JB/T8Product labels
QBJ1Technical specifications for construction and acceptance of pulp and papermaking professional equipment installation projectsQB/T842General technical conditions for light industrial machinery and weighing instruments3 Technical requirements
3.1 Basic requirements
3.1.1 Products should comply with the provisions of this standard and be manufactured according to drawings and technical documents approved through prescribed procedures. 3.1.2 Product manufacturing should comply with the provisions of QB/T842. 3.1.3 Product installation and acceptance should comply with the provisions of QBJ1. 3.2 Performance requirements
3.2.1 When the paper machine is running normally, the vacuum degree must meet the requirements of the papermaking process. 3.2.2 The opening rate of the vacuum roll shall be in accordance with the provisions of Table 1. Table 1
Vacuum couch roll
Vacuum suction roll
Vacuum press roll
3.3 Processing quality requirements
3.3.1 The inner and outer diameter limit deviation and surface roughness of the vacuum roll shall be in accordance with the provisions of Table 2. Approved by the Ministry of Light Industry of the People's Republic of China on December 31, 199110
Opening rate, %
>64 (hole surface)wwW.bzxz.Net
Implemented on August 1, 1992
Vacuum couch roll
Vacuum suction roll
Vacuum press roll
QB/T1422.2—1991
Roller outer surface
External diameter limit deviation, mm
3.3.2 The rubber-coated roller shall comply with the provisions of GB/T9897. Surface roughness R., μm
Roller inner surface
Inner diameter limit deviation, mm
Surface roughness R.μm
3.3.3 After the roller body is cast, the mechanical property test shall be carried out and shall comply with the provisions of GB/T2100 or GB/T1176. 3.3.4 The vacuum box should be tested for water filling and maintained for 1 hour without leakage. 3.3.5 The roundness of the roller surface should not be less than grade 7, and the cylindricity should not be less than grade 8 (except for rollers with medium height). Note: For roundness greater than 500mm, the cylindricity tolerance value is shown in Appendix A (Supplement). 3.4 Assembly quality requirements
3.4.1 The runout of the vacuum roller surface against the second bearing stop circle should not be less than grade 9. 3.4.2 The inner strip of the vacuum roller and the inner wall of the roller should fit tightly, and the width adjustment mechanism should be flexible and free of obstruction. 3.4.3 The angle adjustment of the vacuum box should be light, flexible and free of obstruction. 3.5 Appearance quality
3.5.1 The appearance surface should be flat and smooth, and the outer edges of the joints of adjacent parts should not have obvious misalignment. 3.5.2 The painting requirements for the product appearance should comply with the provisions of QB/T842.7 when there are no special requirements from the user. 4 Test method
4.1 The processing quality inspection shall comply with the requirements of Article 3.3. Generally, the quality records can be checked. 4.2 The opening rate is measured and calculated at three random places on the roller surface according to the area of ​​100mm×100mm. 4.3 The surface roughness is checked by sample block comparison or profilometer. 4.4 The roundness and cylindricity are tested by the two-point method, and the radial runout of the roller surface is tested by a dial indicator on the machine tool. 5 Inspection rules
5.1 Each product shall be shipped after passing the inspection of the manufacturer, and the product shall be accompanied by documents proving its qualification when it leaves the factory. 5.2 Product inspection is divided into factory inspection and type inspection. 5.2.1 Factory inspection
a. The quality inspection of main parts shall comply with the requirements of Article 3.3; b. The assembly quality inspection shall comply with the requirements of Article 3.4; c. The appearance quality inspection shall comply with the requirements of Article 3.5. 5.2.2 Type inspection
Type inspection shall be carried out during the trial production and appraisal of new products or when the national quality supervision agency makes a request. Product type inspection shall be carried out at the user's factory and the paper machine at the same time, and its performance requirements shall comply with the requirements of Article 3.2. 6 Marking, packaging, transportation, storage
6.1 When the product leaves the factory alone, a product label shall be fixed in a conspicuous position. The type and size of the label shall comply with the provisions of JB/T8. The label shall indicate:
Product name;
Diameter × width,
Suction width,
Weight;
Factory date;
Factory number;
Manufacturer name.
QB/T1422.2-1991
When the product leaves the factory alone, the accompanying technical documents include: a.
Certificate of conformity;
Product manual;
Packing list.
6.3The packaging and transportation of the product shall comply with the provisions of QB/T842.8. 4From the date of packing, the product shall be unpacked and inspected every 6 months of storage, and anti-rust measures shall be taken again if necessary. 6.4
The graphic signs for packaging, storage and transportation shall comply with the provisions of GB191 and GB/T6388. QB/T 1422. 2-1991
Appendix A
Cylindricity tolerance values ​​for rollers with a diameter greater than 500 mm
(Supplement)
A1Cylindricity tolerance values ​​for rollers with a diameter greater than 500 mm are shown in Table A1Table Al
Main parameter d
>500～630
630～800
>800～1000
Main parameter d is shown in Figure Al.
Additional notes:
This standard is proposed by the Technical Equipment Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. This standard is drafted by the Shanghai Paper Machinery General Administration. 8
Tolerance grade
Tolerance value, um
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.