Some standard content:
Light Industry Industry Standard of the People's Republic of China
Canadian Standard Freeness Tester
1 Subject Content and Scope of Application
QB/T 1669 -.. 1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of the Canadian Standard Freeness Tester.
This standard applies to the production acceptance and quality assessment of the Canadian Standard Freeness Tester (hereinafter referred to as the Freeness Tester), and the periodic technical status inspection of the Freeness Tester during use should also be used as a reference. 2 Reference Standards
GB/T10739 Standard Atmosphere for the Treatment and Testing of Pulp, Paper and Paperboard Samples GB/T12660 Determination of Water Drainage Performance of Pulp (Canadian Standard Freeness Method) GB/T14253 General Technical Conditions for Light Industry Machinery JJG196 Commonly Used Glass Measuring Apparatus
3 Terminology
Code CSF Canadian Standard Freeness (Canadian Standard Freeness). 3.1
3.2 Freeness unit code 1 freeness unit is equal to the volume of water overflowing from the side tube of the freeness funnel 1mL. 3.3 Residual volume
The volume between the lower edge of the bottom hole of the funnel and the lower edge of the overflow port of the side tube, expressed in mL. 3.4 Bottom hole flow rate
The time for 1000mL of distilled water at 20±0.5℃ to be discharged from the bottom hole, expressed in seconds. 4 Product classification
4.1 Product type and specification
Type Canadian standard type Product model YQ-Z-37 type b. Specifications Measuring range 0~1000 CSF.
4.2 Geometrical characteristics and dimensions of the main parts and components of the product 4.2.1 The main parts of the freeness meter are the filter chamber and the measuring funnel structure, see Figures 1 and 2. 4.2.2 Geometrical characteristics and dimensions of the filter chamber of the freeness meter (see Figure 1) The inner diameter of the cylinder is $101.5+g14mm;
The inner height of the cylinder is 127mm (from the upper surface of the sieve plate to the upper end face of the cylinder); the total volume from the sieve plate to the upper end face of the cylinder is slightly more than 1000ml; the aperture of the air valve is 4.7mm (not allowed to be reduced); the diameter of the sieve plate is 111±0.5mm, the plate thickness is 0.5mm, the sieve hole diameter is 0.50mm, and the sieve hole density is 97 holes/cm2. Approved by the Ministry of Light Industry of the People's Republic of China on January 15, 1993 and implemented on September 1, 1993
Air valve-
Upper sealing cover
Lower sealing cover
QB/T 1669-1992
+101. 5+.11
Figure 1 Filter chamber
4.2.3 Geometrical characteristics and dimensions of the freeness meter measuring funnel (see Figure 2) Total height of the funnel 277mm;
Inner diameter of the upper end of the auxiliary cone $204mm;
Inner cone angle of the main cone 29°±5°;
Inner cone angle of the auxiliary cone 74°;
Inner diameter of the side pipe 13mm;
Distance between the lower edge of the overflow outlet of the side pipe and the lower end surface of the bottom hole of the funnel 50.8±0.7mm.
Sub-cone
Main cone
Side pipe,
4.2.4 Bottom hole geometric characteristics and dimensions (see Figure 3) The total height of the bottom hole is 19.6±0.1mm;
Venturi hole diameter $3.05±0.01mm;
Sub-cone
Figure 2 Measuring funnel
The large end diameter of the cone hole at the upper end of the bottom hole is $10.2±0.05mm. 242
5 Technical requirements
QB/T1669—1992
Φ10.2±0.05
29°±5
Φ3. 05± 0. 01
Venturi hole
44.8±0.05
Figure 3 Bottom hole
5.1 The freeness meter shall comply with the technical requirements of each article of this chapter and be manufactured in accordance with the drawings and documents approved by the prescribed procedures. 5.2 Environmental conditions for the normal operation of the freeness meter Temperature 20±2℃;
b. Clean, no vibration;
Firmly installed, with good self-leveling status. 5.3 The residual volume of the measuring funnel of the freeness meter is 24.1mL, and the error is not allowed to exceed ±0.2mL. 5.4 The flow rate of the bottom hole of the freeness meter is 74.7s, and the error should not exceed ±0.7s. 5.5 Sealing of the filter chamber of the freeness meter
After the upper and lower sealing plates of the filter chamber are covered, they should have good sealing. The specific requirements are: after the lower sealing plate is covered, 1000mL of distilled water is injected into the filter cylinder, and the water should not leak from the lower edge. Then cover the upper sealing plate and close the air valve, and then open the lower sealing plate. The amount of water flowing out of the sieve plate within 5s should not exceed 5mL. 5.6 Measuring cylinder used with the freeness meter
5.6.1 The measuring cylinder type should be a measuring type, and the quality of the measuring cylinder should fully comply with the provisions of the national verification regulations JJG196. 5.6.2 Each freeness meter needs to be equipped with two measuring cylinders of different ranges, with the following specifications: range 0~250mL, graduation value 2mL, capacity tolerance ±1mL; range 0~1000mL, graduation value 10mL, capacity tolerance ±5mL. 5.7 Operational performance of freeness meter
Each operation and moving parts of the freeness meter are labor-saving, flexible, and accurate. 5.8 Appearance quality of freeness meter
5.8.1 The appearance surface of machined parts shall comply with the relevant provisions of GB/T14253. 5.8.2 The surface of painted parts shall comply with the relevant provisions of GB/T14253. 5.8.3 The coating of chrome-plated parts shall be firm and shall not have defects such as burns, chrome thorns, and coating shedding. 5.8.4 The surface oxide layer of blackened parts shall be uniform and consistent in color, with no unoxidized areas. 5.9 Assembly quality of freeness meter
Assembly of freeness meter shall comply with the relevant provisions of GB/T14253. Parts with special requirements shall be specified in the assembly technical documents.
6 Test method
6.1 The test shall be carried out under the conditions specified in 5.2 of this standard. 6.2 Test of residual volume in 5.3 of this standard
6.2.1 Standard measuring instruments for test
a. A-grade burette and tube stand with a measuring range of 0~25ml. and a graduation value of 0.1mL; 243
QB/T 1669 -- 1992
h. One measuring cylinder with a capacity of 25ml and one with a capacity of 1000ml. 6.2.2 Test method
Test preparation Take out the separation cone, place the burette vertically on the stand, and adjust the zero position. Prepare distilled water at a temperature of 20±0.5°C. Test steps: Block the bottom hole with your finger, pour about 50mL of distilled water into the funnel, and observe the outlet of the side tube. When the water stops flowing out of the side tube, take the measuring cylinder and place it under the bottom hole, then quickly remove your finger, and the water will flow out of the bottom hole and enter the measuring cylinder. When the bottom hole stops flowing, carefully pour the water received in the measuring cylinder into the burette, and read the volume of water from the scale of the burette. The above steps should be repeated three times, and the average value of the three times is the test result, accurate to 0.05ml. 6.3 Test of the flow rate of the bottom hole in 5.4 of this standard
6.3.1 Standard instruments for testing
a. Stopwatch with a graduation value of 0.1s;
b. Measuring cylinder with a capacity of 1000mL;
c. Thermometer.
6.3.2 Test method
Test preparation Take out the separation cone and plug the water outlet of the side pipe with a soft stopper. Use your finger to plug the bottom hole and pour about 200mL of distilled water at 20±0.5'C into the funnel, then remove your finger and the water will flow out freely from the bottom hole. Test steps Use your finger to plug the bottom hole and pour 1000ml of distilled water at 20±0.5C into the funnel. After the water surface is calm for half a minute, remove your finger and start the stopwatch at the same time. The water will flow out from the bottom hole and be caught with a measuring cylinder. Pay attention to the bottom hole. When the bottom hole stops flowing, stop the stopwatch immediately and record the time.
Repeat the above steps three times, and the time recorded each time should be 74.4±0.7s. The average value of the three tests is the test result, accurate to 0.1s. 6.4 Inspection of matching measuring cylinders in 5.6 of this standard
Before matching measuring cylinders enter the factory warehouse, they should be sampled according to the method specified in the National Metrology Verification Regulations JJG198-1990, and the metrology department shall issue a sample inspection certificate. The product can be exempted from inspection during the acceptance of the whole machine. 6.5 Each of 5.5, 5.7, 5.8, and 5.9 of this standard shall be measured or visually inspected as required. 7 Inspection rules
7.1 Factory inspection of freeness meter According to each of the provisions of this standard, all inspection batches shall be inspected. 7.2 The main measurable performance of the freeness meter must meet the requirements of this standard. Unqualified items of non-measuring general performance are allowed to be repaired to meet the requirements.
Note: Non-measuring general performance refers to surface quality and non-quantitative indicators that do not affect the metrological performance of the whole machine. 7.3 Before the packaging of the freeness meter is put into storage, sampling re-inspection is required. The re-inspection rules are as follows: a. Stratified random sampling is adopted for re-inspection;
b. The qualified number of re-inspection is zero;
c. The re-inspection sample is 10% of the inspection batch. When the batch is less than 20 units, the sample should not be less than 3 units; when the batch is less than 10 units, the sample should not be less than 2 units. The decimal of the calculated value of the number of sampling units is rounded to an integer; d. The samples are checked item by item according to the requirements of this standard. If unqualified products appear in the samples, a second extended sampling should be carried out, and the extended sampling ratio is 20% of the inspection batch (excluding the first sample). If unqualified products appear again in the second sampling, the whole batch should be rejected, and the batch should be re-inspected after being sorted out and repaired.
7.4 The measured data of the main items of the factory inspection of the freeness meter should be recorded in the random documents. Without documents proving that the product quality is qualified, the product cannot be released.
7:5 The user has the right to accept the instrument under the conditions of transportation, storage, installation and use rules of this standard. If there is any problem, it should be raised within one year after arrival. If it is confirmed that the product is damaged or cannot work properly due to poor manufacturing quality, the manufacturer shall be responsible for repair or replacement. 8 Marking, packaging, transportation and storage
8.1 Markingbzxz.net
8.1.1 Product marking
The freeness meter should be marked with a plate. The plate is made of copper or aluminum, and the content of the plate includes: 244
Manufacturer's name,
b. Product name;
Product model and logo;
Main parameters of the product;
Manufacture date, number or production batch number.
8.1.2 Packaging Marks
QB/T 1669-—1992
The product packaging box should have text and symbolic marks, including: a.
Product name;
Manufacturer name;
Shipment and delivery marks and year and month of production;
Box number;
Precision instrument, handle with care, moisture-proof, sun-proof, upright direction symbols; gross weight.
8.2 Packaging
8.2.1 The outer packaging material of the freeness meter is solid and dry wood, and the material should comply with the relevant provisions of GB/T14253. 8.2.2 The bottom plate thickness of the outer packaging box of the freeness meter should not be less than 25mm, and the side plate and top plate thickness should not be less than 15mm. Five-layer plywood can also be used. The surface of the box board must be flat and smooth. 8.2.3 Before packaging the freeness meter, the whole machine should be firmly fixed to the bottom plate of the box (connected with anchor bolts), and it is necessary to ensure that the instrument does not loosen or shift in the box after packaging. The accessory box should be fixed in a proper position in the box in a reliable way. The accessory box of the measuring cylinder used in conjunction should have reliable anti-pressure, anti-collision and anti-fall measures to ensure that the measuring cylinder will not be damaged during transportation. 8.2.4 The joints of the box board of the packaging box should be groove joints or press edge staggered joints, and the inner wall of the packaging box should be paved with moisture-proof linoleum. A plastic film protective cover should be added to the outside of the instrument.
8.2.5 After the packaging box is sealed, the four corners of the reinforced box should be nailed with angle irons. The angle irons can be bent with iron plates with a thickness of not less than 1mm. 8.2.6 The random technical documents of the freeness meter are packaged in a plastic bag and fixed to a certain position in the packaging box, and this position is marked on the outside of the box. Random documents include:
a. Product certificate;
Product instruction manual;
List of random accessories and spare parts;
d. Packing list;
Unpacking instructions.
8.3 Transportation
The freeness meter can be transported in any way when it is packaged. It should be protected from rain, falling, collision and strong bumps during transportation. It is strictly forbidden to invert or place it sideways.
8.4 Storage
8.4.1 Storage place: A dry and ventilated warehouse at room temperature. 8.4.2 Storage period: six months. After six months, unpacking inspection should be carried out. Additional instructions:
This standard was 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 was drafted by Sichuan Changjiang Papermaking Instrument Factory, and the main drafters of this standard were Lv Huiqing and Liu Jiming. 245
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