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GB/T 786.3-2021: Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams
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Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams
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GB/T 786.3-2021
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Basic data | Standard ID | GB/T 786.3-2021 (GB/T786.3-2021) | | Description (Translated English) | Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J20 | | Word Count Estimation | 14,184 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 786.3-2021: Fluid power systems and components - Graphical symbols and circuit diagrams - Part 3: Symbol modules and connected symbols in circuit diagrams
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Fluid power systems and components-Graphical symbols and circuit diagrams-Part 3.Symbol modules and connected symbols in circuit diagrams
ICS 23.100.01
CCSJ20
National Standards of People's Republic of China
Graphical symbols and circuit diagrams of fluid transmission systems and components
Part 3.Symbolic modules and
Connection symbol
(ISO 1219-3.2016, IDT)
Released on 2021-05-21
2021-12-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅰ
Introduction Ⅱ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Rules for creating symbolic modules 2
4.1 Outer frame line width 2
4.2 Frame size 3
4.3 The distance between the outer frame and the line 3
4.4 Symbol module direction 3
4.5 Representation of closed pipeline 3
5 Application rules of symbol modules in loop diagram 3
5.1 Typical Layout of Symbol Module 3
5.2 Connection of Symbol Module 4
5.3 Spacing of symbol modules 4
5.4 Frame 4 of the connected symbol module
5.5 Decomposition of Symbolic Module 4
5.6 Expansion of Symbol Module 4
5.7 Positioning and alignment of connected symbol modules 5
5.8 The name of the connection point of the symbolic module interface 5
6 Example of a circuit diagram with symbolic blocks 5
7 Marking description 5
Appendix A (informative) Example of a pneumatic circuit diagram for a valve with an external connection point on the top 6
Appendix B (informative) Hydraulic circuit diagram example 8
Appendix C (informative) Pneumatic circuit diagram example 9
Appendix D (informative) Example of pneumatic circuit diagram 10
Reference 11
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document is the third part of GB/T 786 "Fluid Transmission Systems and Components Graphic Symbols and Circuit Diagrams". GB/T 786 has been issued
The following parts are distributed.
---Part 1.Graphical symbols;
---Part 2.Circuit diagram;
---Part 3.Symbol modules and connection symbols in the circuit diagram.
This document is equivalent to ISO 1219-3.2016 ``Graphic symbols and circuit diagrams of fluid transmission systems and components-Part 3.Circuit diagrams
Symbol modules and connection symbols in ".
The following editorial changes have been made to this document.
---Appendix A~Appendix D are rearranged in the order mentioned in the standard text.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3).
Drafting organizations of this document. Xuzhou Xugong Hydraulic Parts Co., Ltd., Xiamen Yinhua Machinery Co., Ltd., Hefei Handebel Attachment Technology Co., Ltd.
Company, Zhejiang Haihong Hydraulic Technology Co., Ltd., Foshan Shenghua Auto Parts Manufacturing Co., Ltd., Guangdong Yanfei Technology Co., Ltd.,
Guangdong Hengxinya Technology Co., Ltd., Fujian Shengda Machinery Co., Ltd., Beijing Machinery Industry Automation Research Institute Co., Ltd.
The main drafters of this document. Zhang Qiang, Su Yongding, Liu Qingjiao, He Xianjian, Bao Xunquan, Wang Jun, Wang Li, Hu Xiaojun, Yang Lingling, Long Xinhua,
Zhang Xiaodong, Cao Qiaohui.
Introduction
In a fluid transmission system, power is transmitted and controlled through a pressurized fluid (liquid or gas) in a closed circuit. Through normative expressions
The circuit diagram is helpful to understand the design and description of functional modules, and can avoid confusion and confusion during planning, manufacturing, installation and maintenance.
error.
GB/T 786 has unified specifications and requirements for the graphic symbols and circuit diagrams of fluid transmission systems and components from the technical level.
Part of the composition.
---Part 1.Graphical symbols. The purpose is to determine the basic elements of various symbols and fluid transmission components and symbols in the circuit diagram.
Design rules.
---Part 2.Circuit diagram. The purpose is to determine the rules for drawing hydraulic and pneumatic circuit diagrams.
---Part 3.Symbol modules and connection symbols in the circuit diagram. The purpose is to determine the creation and creation of connectable component symbols in the circuit diagram.
The rules for combination and the rules for the creation and combination of symbols corresponding to the modules that constitute the function unit.
Unless other rules are defined in this document, all rules are in accordance with GB/T 786.1.The symbols and arrangement of connectable components in this document
The column relationship has been slightly modified based on the provisions of GB/T 786.2.
Graphical symbols and circuit diagrams of fluid transmission systems and components
Part 3.Symbolic modules and
Connection symbol
1 Scope
This document supplements GB/T 786.1 and GB/T 786.2, and specifies the creation and combination of connectable component symbols in circuit diagrams
The rules to reduce the design workload and the number of pipelines in the circuit diagram.
This document specifies the rules for the creation and combination of symbols corresponding to the modules that constitute functional units, such as oil circuit block assemblies or superimposed valves
Valve group or gas source processing device (FRL device). The rules of this document are not only conducive to the design of circuit diagrams, but also conducive to understanding the use of symbolic models.
The block represents the circuit diagram of the combined component.
This document contains examples of the application of the corresponding rules.
Note. Typical application examples that comply with the rules of this document are given in the appendix. Table 1 summarizes the typical application of the rules of this document in each appendix example.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
ISO 1219-1 Graphical symbols and circuit diagrams of fluid power systems and components-Part 1.For general use and data processing applications
Graphical symbols used (Fluidpowersystemsandcomponents-Graphicalsymbolsandcircuitdiagrams-
Part 1.Graphicalsymbolsforconventionaluseanddata-processingapplications)
Note. GB/T 786.1-2021 Graphical symbols and circuit diagrams of fluid power transmission systems and components Part 1.Graphical symbols (ISO 1219-1.2012, IDT)
ISO 1219-2 Graphical symbols and circuit diagrams of fluid power systems and components-Part 2.Circuit diagrams (Fluidpowersystems
andcomponents-Graphicalsymbolsandcircuitdiagrams-Part 2.Circuitdiagrams)
Note. GB/T 786.2-2018 Graphical symbols and circuit diagrams of fluid transmission systems and components Part 2.Circuit diagrams (ISO 1219-2.2012, MOD)
ISO 5598 Fluidpower systems and components-Vocabulary (Fluidpowersystemsandcomponents-Vocabulary)
Note. GB/T 17446-2012 Fluid Power System and Components Vocabulary (ISO 5598.2008, IDT)
3 Terms and definitions
The following terms and definitions defined in ISO 5598 apply to this document.
3.1
Symbolmodules
Comply with the modules (such as backplane modules) constituted by the symbols, lines, frames and connection points specified by ISO 1219-1 (the symbol modules can be
The same interfaces are connected to each other, see Figure 1).
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