JB/T 3711.2-1999 This standard is a revision of JB 3711.1-84 "Graphic Symbols for Centralized Lubrication Systems". During the revision, editorial changes were made in accordance with relevant regulations and graphic symbols for oil-gas systems and filters were added. This standard specifies the unified graphic symbols used in the graphics of centralized lubrication systems, the preparation of instructions and various technical documents. This standard is applicable to the graphic symbols of centralized lubrication systems in scientific research, engineering and technical documents, and publications. This standard was first issued on June 29, 1984. JB/T 3711.2-1999 Graphic Symbols for Centralized Lubrication Systems JB/T3711.2-1999 Standard download decompression password: www.bzxz.net

ICS21.260
Machinery Industry Standard of the People's Republic of China
JB/T3711.2-1999
equivalent to DIN24271/2—82
Centralized Lubrication System
Graphic Symbols
General specification for lubrication systems and elements
Published on 1999-06-28
National Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T3711.2—1999
This standard is a revision of JB3711.2-84 "Graphic Symbols for Centralized Lubrication Systems". JB3711.2-84 is equivalent to DIN24271/2-82 "Graphic Symbols for Centralized Lubrication Systems". Compared with JB3711.2-84, the main technical content changes of this standard are: adding graphic symbols of oil-gas system and filter. At the same time, the original standard has been edited. Appendix A of this standard is a prompt appendix.
This standard replaces JB3711.2-84 from the date of implementation. This standard is proposed and managed by the Metallurgical Equipment Standardization Technical Committee. The drafting unit of this standard: Taiyuan Lubrication and Hydraulic Research Institute. The main drafters of this standard: Mao Jiping, Dai Guoqiang, Li Youquan, Li Weimin This standard was first issued in June 1984.
Standard of the Machinery Industry of the People's Republic of China
Centralized Lubrication SystembzxZ.net
Graphic Symbols
General Specification for Lubrication Systems and Eleanents
JB/T3711.2-1999
eqvDIN24271/2—82
Replaces JB3711.2—84
This standard specifies the unified graphic symbols used when drawing centralized lubrication system graphics, compiling instructions and various technical documents. This standard is applicable to the graphic symbols of centralized lubrication systems in scientific research, engineering and technical documents and publications. 2 Referenced 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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T786.1—1993 Hydraulic and pneumatic graphic symbols JB/T3711.1—1999 Centralized lubrication system terminology and classification graphic symbols
Centralized lubrication system graphic symbols are shown in Table 1.
Terminology approved by the State Machinery Industry Bureau on June 28, 1999
(See JB/T371L1)
Lubrication point
Venting point
Quantitative lubrication pump
Variable lubrication pump
Motor
Pump device
(See JB/T371L.1)
2000-01-0 1 Implementation
JB/T3711.2—1999
Table 1 (continued)
(See JB/T37111)
Quantitative multi-point pump
(Take 5 oil outlets as an example)
Variable multi-point pump
(Take 5 oil outlets as an example)
Agitator
(For grease)
Follow-up piston
(For grease)
Filter-pressure reducing valve-oil mist collector
Oil mist collector
Throttling distributor
(Take 3 oil outlets as an example)
Adjustable flow distributor
(Take 3 oil outlets as an example)
Single-line distributor
(Take 3 oil outlets as an example)
Dual-line distributor||tt| |(Take 8 and 4 oil outlets as an example)
Progressive distributor
(Take 8 oil outlets as an example)
Condensation nozzle
(See JB/T3711.1)
JB/T3711.21999
Table 1 (continued)
(See JB/T37111)
Spray nozzle
Injection nozzle|| tt||Time adjustment program controller
Machine cycle program controller
Directional valve (operation type not indicated)
Circulation distributor
Unloading valve
Check valve
Overflow valve
Pressure reducing valve
Throttle valve
(See JB/T3711.1)
JB/T3711.2 -1999
Table 1 (continued)
(See JB/T37111)
Adjustable throttle valve
Pressure compensated throttle valve
Throttle hole
Pressure switch
Differential pressure switch
Electric contact pressure gauge
Pressure gauge
Level switch
Temperature switch
(See JB /T3711.1）
4.102.1.1
JB/T3711.2—1999
Table 1 (continued)
(See JB/T37111)
Oil flow switch
Pressure indicator
Oil flow indicator
Function indicator
(Take single-line distributor as an example)||tt ||Level indicator
Counter
(such as for lubrication pulse or volume calculation)Flow meter
Thermometer
Thin oil filter
Dry oil filter
Oil-gas distributor
(See JB/T3711.1)
Effectiveness
JB/T3711.2—1999
Table 1 (end)
(See JB/T37111)
Oil-gas mixer
For instructions on the use of graphic symbols, see Appendix A (suggestive appendix). 3.2
Application examples
The principle of centralized lubrication system is shown in Table 2.
Consumable lubrication system
Throttling system
Single-line system
Dual-line system
Multi-line system
Progressive system
(See JB/T3711.1)
Circulating lubrication system
Oil-mist system
Oil-gas system
JB/T3711.2—1999
Table 2 (end)| |tt||Consumable lubrication system
Circulating lubrication system
Note: A-Pump with oil tank: BLubrication point: CThrottle valve DSingle-line distributor: E-Unloading pipeline: FPressure pipeline: G-Unloading valve: H-Main pipeline: K-Lubrication pipeline: L-4/2 reversing valve: M-Compressed air pipeline: N-Branch pipeline: O-Oil mist device: P-Progressive distributor: R-Oil return pipeline: S-Dual-line distributor: T-Oil-gas mixer: V-Condensation nozzle. 4.2 The distributor of the centralized lubrication system is shown in Table 3. Table 3
Centralized lubrication system
(See Chapter 4 of JB/T3711.1-1999)Throttling system
(See 4.3.1 of JB/T3711.1-1999)Single-line system
(See 4.3.2 of JB/T3711.1-1999)Dual-line system
(See 4.3.3 of JB/T3711.1-1999) 711.1-1999 4.3.3) Multi-line system
(See 43.4 in JB/T3711.1-1999) Progressive system
(See 4.3.5 in JB/T3711.1-1999) Oil mist system
(See 43.6 in JB/T3711.1-1999) Oil-gas system||tt ||(See 4.3.7 in JB/T3711.1-1999) 5 Example of combined centralized lubrication system
Distributor
(See 4.7 in JB/T3711.1-1999)
Throttling distributor
Single-line distributor
Dual-line distributor
Functional composition of distributor
Throttle valve
Adjustable throttle valve + oil board
Pressure compensation throttle valve
Single-line oiler + oil board
Dual-line oiler + oil board
No distributor, because the lubrication pipeline directly connects the oil pump to the lubrication point Progressive distributor
Condensation nozzle
Progressive distributor
Oil-gas distributor
5.1Single-line lubrication system with oil spray device is shown in Figure 1. Progressive oil feeder + pipeline accessories
Progressive oil feeder + pipeline accessories
Oil-gas oil feeder
JB/T3711.2—1999
5.2Multi-line progressive lubrication system with spray device is shown in Figure 2. Figure 2
5.3Multi-line system with progressive distributor is shown in Figure 3. Figure 3
5.4Circulating progressive lubrication system is shown in Figure 4.5.5Circulating throttling lubrication system is shown in Figure 5. Electric control box
JB/T 3711.2—1999
Electrical control box
JB/T3711.2—1999
Appendix A
(Suggested Appendix)
Instructions for the use of graphic symbols
A1 The graphic symbols specified in this standard are mainly used to draw the schematic diagram of the lubrication system with lubricating oil and grease as lubricants. 2 This standard only specifies the basic symbols of various lubrication components, as well as some commonly used symbols of other related devices. A2
A3 The symbol only indicates the function of the component and the channel connecting the system, but does not indicate the specific structure and parameters of the component, the specific position of the system pipeline and the installation position of the component
A4 The component symbols are all represented by the static position or the zero position. Exceptions can be made when the action of the component system is otherwise specified. A5 The arrangement of symbols in the system diagram, except for directional component symbols (such as oil tanks, instruments, etc.), can be drawn horizontally or vertically according to the specific situation.
A6 The name, model and parameters of the components (such as pressure, flow, power and pipe diameter, etc.) are generally indicated in the component table of the system diagram, and can be marked next to the component symbol when necessary.
A7 For graphic symbols not specified in this standard, the corresponding graphic symbols in GB/T786.1 can be used. If there is no provision in GB/T786.1, it can be derived according to the principles of this standard and the regularity of the listed legends. When it is impossible to derive, or it is necessary to specifically explain the structure and operating principle of an important component in the system, it is allowed to use a structural diagram to represent it locally. A8 The size of the symbol should be based on the principle of clarity and beauty, and should be handled as appropriate according to the size of the drawing, but the proportion of the graphic itself should be appropriately maintained. 10
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