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JY/T 0229-2019: Demonstrator for liquid pressure on container wall
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Demonstrator for liquid pressure on container wall
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JY/T 0229-2019
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Basic data | Standard ID | JY/T 0229-2019 (JY/T0229-2019) | | Description (Translated English) | Demonstrator for liquid pressure on container wall | | Sector / Industry | Education Industry Standard (Recommended) | | Classification of Chinese Standard | Y51 | | Word Count Estimation | 7,741 | | Date of Issue | 2019-04-08 | | Date of Implementation | 2019-09-01 | | Older Standard (superseded by this standard) | JY 229-1987 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | Ministry of Education of the People's Republic of China | JY/T 0229-2019: Demonstrator for liquid pressure on container wall---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.
(Liquid to wall pressure demonstrator)
ICS 03.180
Y 51
Education Industry Standard of the People's Republic of China
Replacing JY/T 229-1987
Liquid counter wall pressure demonstrator
Demonstrator for liquid pressure on container wall
Published.2019-04-04
2019--09--01 implementation
Published by the Ministry of Education of the People's Republic of China
JY
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces JY/T 229-1987 "Demonstrator of liquid counterpressure". Compared with JY/T 229-1987, except for editorial changes
The main technical changes are as follows.
-Added a contour nozzle on the symmetrical side (see 4.2.3.1);
-Increased nozzle orientation requirements (see 4.2.3.1);
-Added the content of tick mark requirements (see 4.2.4);
-Increased the light transmittance when the cylinder is made of transparent plastic (see 4.3);
-Added the use of glass as a cylindrical material, and increased the internal stress requirements of the glass (see 3.2, 4.4);
-Added requirements for environmental testing (see 4.6);
-Added specific requirements for packaging (see 7.2);
-Removed the round tube (see 1.2 of the 1987 version);
-The dimensions of the cylinder have been modified (see 4.2.2, 1.3 of the 1987 version);
-The nozzle position has been modified (see 4.2.3, 1.2 of the 1987 version).
Please note that some elements of this document may involve patents. The issuer of this document is not responsible for identifying these patents.
This standard is proposed by the Basic Education Department of the Ministry of Education of the People's Republic of China.
This standard is under the jurisdiction of the National Technical Committee for Educational Equipment Standardization (SAC/TC 125).
This standard was drafted. Educational Equipment Research and Development Center, Ministry of Education.
The main drafters of this standard. Ma Qiang and Chen Yichun.
This standard replaces JY/T 229-1987.
The release of previous versions of this standard instead of the standard is as follows.
--JY/T 229-1987.
Liquid counter wall pressure demonstrator
1 Scope
This standard specifies the model designation, requirements, test methods, inspection rules, instructions for use, qualification certificates,
Marking, packaging, transportation and storage.
This standard applies to liquid pressure wall demonstrator for teaching in middle schools.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2828.1-2012 Counting sampling inspection procedures. Part 1. Sampling plan for batch inspection inspection according to acceptance quality limit (AQL)
JY/T 0001-2003 General quality requirements for teaching instruments and equipment products
JY/T 0002 Inspection rules for teaching instruments and equipment products
JY/T 0026-1991 teaching instrument and teaching equipment product model naming method
JY/T 0213-1994 Teaching mechanics, thermal instrument transportation, storage environmental conditions and test methods
JY/T 0423-2011 General quality requirements and test methods of teaching glass instruments
3 Model designation
3.1 Naming rules
The product is named according to the provisions of JY/T 0026-1991.
3.2 Model Nomenclature
The model name of the liquid counter wall pressure demonstrator is.
L-YQY-B/S-300
Product specifications, barrel height, unit is millimeter (mm)
Product feature code, glass B or plastic S
Product name Pinyin prefix, liquid counter wall pressure demonstrator
Product model classification code, special instrument for mechanics
Model example.
L-YQY-S-300 is a liquid pressure wall demonstrator. It is made of plastic and has a height of 300 mm.
4 Requirements
4.1 Use environmental conditions
The temperature is between 1 ℃ and 40 ℃.
4.2 Structure
4.2.1 Composition
4.2.1.1 The presenter shall be a colorless and transparent cylinder.
4.2.1.2 There shall be three nozzles at different depths on one side of the side wall of the cylinder, and the other side of the symmetrical side shall have a nozzle with the same height as the middle nozzle, as shown in Figure 1.
4.2.1.3 Four nozzle plugs or covers shall be provided.
In millimeters
Figure 1 Schematic diagram of the nozzle position on the liquid counter wall pressure demonstrator
4.2.2 Cylinder
The inner diameter of the cylinder mouth shall be 100 mm ± 5 mm, the depth shall be 300 mm ± 10 mm, and the wall thickness shall be 1 mm to 2.5 mm.
4.2.3 Nozzle
4.2.3.1 The depth of the center of the nozzle hole from the bottom of the cylinder shall be 60 mm ± 2 mm, 140 mm ± 4 mm, and 220 mm ± 5 mm, respectively. Two contour spray
The mouth height difference should not be greater than ± 1 mm. The position and direction of each nozzle are shown in Figure 1.
4.2.3.2 The nozzle length shall be 10 mm to 20 mm. The length of each nozzle on the same product shall be equal, and the difference shall not be greater than 1 mm. Nozzle Aperture
Should be 2 mm ± 0.2 mm.
4.2.3.3 The nozzle shall be able to cooperate well with the nozzle plug (or cover) without leakage.
4.2.4 tick marks
The front side of the outer wall of the cylinder shall be marked with a red tick mark indicating the depth. The zero position of the tick mark shall be no more than 20 mm below the mouth of the cylinder and reach the bottom of the cylinder.
The minimum division value should be 10 mm.
The scale line should be 1 mm ± 0.1mm wide, and the line length should not be less than 15 mm. Each 20 mm should be marked with a number, and the scale line should not be broken.
4.3 Cylinder wall transmittance
Colorless and transparent materials should be used, and the light transmittance is not less than 85%.
4.4 Internal stress of glass materials
When the cylinder is made of glass, the internal stress should not be greater than 180 nm/cm.
4.5 Appearance and workmanship
It should meet the relevant requirements of Chapter 7 and Chapter 8 of JY/T 0001-2003.
4.6 Environmental test
When using plastic material, it should meet the free fall (packing state) requirements in 3.1 Table 2 of JY/T 0213-1994. When using glass
Conforms to 8.4.3 in JY/T 0423-2011.
5 Test method
5.1 Appearance
Sensory inspection of appearance and composition.
5.2 Dimensions
The length is measured with a steel ruler with a graduation value of 1 mm or a vernier caliper with a graduation value of 0.02 mm. Scale line width scale value is 0.01mm
The readings are measured by a microscope.
5.3 Leaks
The nozzle on the cylinder is plugged with a nozzle plug (or cover), and the cylinder is filled with fresh water. After 1 min, there should be no leakage and it should meet the requirements of 4.2.3.3.
5.4 Cylinder transmittance
Measure with a haze meter, or compare with a new transparent polystyrene vessel, sensory inspection. When in dispute, use the haze test
This is the arbitration method.
5.5 Internal stress of glass materials
Press 6.1.2 in JY/T 0423-2011.
5.6 Environmental test
Press JY/T 0213-1994 4.6 and JY/T 0423-2011 8.4.3.
6 Inspection rules
6.1 Inspection classification
The inspection of this product is divided into factory inspection, type inspection and quality supervision inspection.
6.2 Inspection items and inspection methods
The inspection items and inspection methods for factory inspection and type inspection are shown in Table 1.
Table 1 Inspection items and inspection methods for factory inspection and type inspection
Serial number inspection content standard provisions factory inspection type inspection
1 Composition 4.2.1 ● ●
2 cylinder 4.2.2 ○ ●
3 Nozzle 4.2.3 ○ ●
4 tick marks 4.2.4 ● ●
5 Cylinder wall light transmittance a 4.3 ○ ●
6 Glass material internal stressb 4.4 ○ ●
7 Appearance and craftsmanship 4.5 ● ●
8 Instructions for use, certificates, marks 7.1 ○ ●
Packaging 7.2 ● ●
Transport and storage 7.2 ○ ●
10 Environmental test 4.6 ○ ●
Note. "●" in the table indicates all inspection items, and "○" indicates sampling inspection items.
When using transparent plastic as the cylindrical material.
When glass is used as the cylindrical material.
6.3 Lot rules and sampling methods
6.3.1 The factory inspection shall be batched according to the natural batch of delivery, and the type inspection shall be batched according to the stock array.
6.3.2 When leaving the factory for inspection, inspect all the inspection items first, take samples from the qualified products of all inspection items, and inspect the items for sampling inspection.
6.3.3 The sampling method for factory inspection and type inspection is according to JY/T 0002.
6.4 Non-conformance determination
6.4.1 The determination of sampling inspection shall be in accordance with the relevant provisions of JY/T 0002.
6.4.2 The failure criterion of a single sample shall be in accordance with the relevant provisions of JY/T 0002.
6.4.3 During the inspection of all inspection items, it shall be determined according to the unqualified criterion of a single sample.
6.4.4 The size of the standard cylinder, nozzle position and direction are the main performance indicators.
6.5 Review rules
6.5.1 Unqualified batches and products can be submitted for inspection again after rework.
6.5.2 Due to the re-inspection of the sampling inspection items, the transfer rules shall be implemented in accordance with the provisions of 9.3 in GB/T 2828.1-2012.
Sub-sampling plan, general inspection level III, AQL value is 2.5.
6.6 Quality supervision inspection
Refer to type inspection.
7 Instructions for use, certificates, markings, packaging, transportation and storage
7.1 Instructions for use, certificates, marks
Should meet the requirements of Chapter 11 of JY/T 0001-2003.
7.2 Packaging, transportation and storage
Should meet the relevant requirements of Chapter 12 of JY/T 0001-2003. When the material of the product is glass, each product should have good shock and pressure resistance.
package.
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