JB/T 5922-1991 Hydraulic Two-way Cartridge Valve Graphical Symbols JB/T5922-1991 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 5922-1991
Graphic Symbols for Hydraulic Two-way Cartridge Valves
Published on December 11, 1991
Implementation by the Ministry of Machinery and Electronics Industry of the People's Republic of China on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Graphic Symbols for Hydraulic Two-way Cartridge Valves
1 Subject Content and Scope of Application
This standard specifies the graphic symbols for two-way cartridge valves. JB/T5922-1991
This standard applies to two-way cartridge valves with hydraulic oil as the working medium. It is mainly used to draw the schematic diagram of hydraulic systems controlled by two-way cartridge valves.
Referenced Standards
GB786.1 Hydraulic and Pneumatic Graphic Symbols
3 Graphic Symbols
3.1 The graphic symbols for cartridges are shown in Table 1.
3.2 The graphic symbols of the control cover are shown in Table 2. 3.3 The graphic symbols of commonly used cartridge valves are shown in Table 3. 3.4 The graphic symbols of cartridge valve blocks are shown in Figure 1. 4
Graphic symbol drawing rules
4.1 Symbol elements and functional elements
The solid isosceles triangle represents the valve core with a throttling window. Other symbol elements and functional elements shall comply with the provisions of GB786.1. 4.2 Graphic symbols of cartridges
The basic dimensions of the graphic symbols of the cone valve cartridges with the valve core area ratio aa
AA<1 are shown in Figure 2: The basic dimensions of the graphic symbols of the cone valve cartridges with Ax
4=1 are shown in Figure 3; b. The valve core area ratio aa=
The valve core area ratio αA
4.3 Graphic symbols of control cover plates
The basic dimensions of the graphic symbols of the sliding valve cartridges with the valve core area ratio αA
=1 are shown in Figure 4. a. The basic dimensions of the graphic symbols of the control cover are shown in Figure 5: b. The graphic symbols of pilot control components such as shuttle valves, one-way valves, hydraulic one-way valves, throttles, and throttles with pressure compensation in the control cover can omit square, rectangular, and circular frames. 4.4 Combination of graphic symbols for cartridge valves
4.4.1 The upper edge of the control cavity in the cartridge symbol should be aligned with and centered on the bottom edge of the control cover symbol. 4.4.2 When the pilot control valve and other control components need to be combined on the control cover, the mounting surfaces should be aligned, and the corresponding control channels should be aligned. 4.5 Other provisions
4.5.1 Graphic symbols not included in this standard can be derived according to the symbol drawing rules and symbol examples specified in this standard. 4.5.2 When it is impossible to directly quote or derive, or when it is necessary to specifically explain the structure and working principle of a certain part, a structural diagram can be used to represent it locally.
Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on December 11, 1991 and implemented on July 1, 1992
JB/T 5922-1991
4.5.3 Except as otherwise specified, the size of symbols shall be based on the principle of clarity and aesthetics. When drawing, it may be processed according to actual conditions, but the appropriate proportions of the various parts of the graphic should be maintained.
Table 1 Graphic symbols of plug-in parts
Cone valve with αA<1
Cone valve with a throttling hole in the valve core
Cone valve with a throttling window
Cone valve with a connecting hole in the valve core
Cone valve with a feedback spring
and a throttling window in the valve coreWww.bzxZ.net
Cone valve with aA=I
Cone valve with a throttling hole in the valve core
Graphic symbol
AA: Effective area at A oil port
Ag: Effective area at B oil port
Ax: Effective area at X control chamber
Generally used for directional control and pressure control
Generally used for directional control and flow control
Generally used for directional control
Generally used for Force feedback proportional flow control
Generally used for pressure control and direction control
Generally used for pressure control
Spool with throttling window
(A=1 slide valve
Directional valve basic cover
With embedded pilot hydraulic control
One-way element cover
With embedded shuttle element
With stroke adjustment device
Basic cover
Cover for mounting four-port directional valve
JB/T5922-1991
Continued Table 1
Graphic symbols
Table 2 Graphic symbols of control cover
Graphic symbols
Generally used for pressure, flow and direction controlGenerally used for reduction Pressure valve or pressure compensator
With throttling screw
For directional valve
For pressure selection
For flow control (the symbol of the stroke adjustment device can be drawn on the upper side of the left and right corners)
Cover plate with shuttle element for mounting three-port directional valve
Basic cover plate for pressure valve
Pressure control cover plate for mounting three-position four-way solenoid
direction valve and having high and low pressure selection function
Basic cover plate for pressure reducing valve with micro flow control
Pressure reducing valve for mounting three-position four-way solenoid
direction valve and having high and low pressure selection function
Control cover plate
Check valve
JB/T 5922-1991
Continued Table 2
Graphic symbols
Feng 2 Shui 92
Table 3 Typical cartridge valve graphic symbols Example
Graphic symbols
This valve consists of a cone valve cartridge with an area ratio of α<1 and a basic cover plate. With one-way function
Directional flow compound control
Pressure control valve
Pressure control valve
Proportional flow control valve
JB/T5922-1991
Continued Table 3
Graphic symbols
This valve consists of a cone valve cartridge with a valve core area ratio of α<1 and a
throttling window, a control cover plate with a stroke adjustment device and a two-position three-way electromagnetic pilot valve (ball type). It has the functions of two-position two-way directional control and throttling control. The valve consists of a cone-shaped insert with a valve core area ratio of α=1, a pressure reducing valve control cover with high and low pressure selection function, a superimposed pressure regulating valve and a three-position four-way solenoid reversing valve (sliding valve type). It has the functions of high and low pressure selection and unloading control. The valve consists of a sliding valve insert with α=1 and a control cover with a micro-flow controller and a pilot pressure regulating valve. Pressure reducing valve with constant pressure output
This valve is composed of a cone valve cartridge with feedback spring and
throttling window with α<1, and a control cover with a two-way proportional pilot valve. It is a displacement-force feedback proportional throttle valve
JB/T5922-1991
Figure 1 Example of graphic symbols for cartridge valve blocks
Figure 2 Graphic symbol for cone valve cartridge with valve core area ratio α
4A<1 Basic size Ax
JB/T5922-1991||t t||Valve core area ratio αA=
=1Conical valve cartridge basic dimensions of graphic symbolsAx
Sliding valve cartridge basic dimensions of graphic symbolsAx
=1Figure 4 Valve core area ratio αA=
JB/T5922-1991
Basic dimensions of graphic symbols for control cover
Note: The symbols of pilot control components embedded in the cover can be found in Table 2 and comply with the provisions of GB786.1. Additional instructions:
This standard is proposed and managed by the National Hydraulic and Pneumatic Standardization Technical Committee. This standard was drafted by the 704th Institute of the 7th Research Institute of China State Shipbuilding Corporation. The main drafters of this standard are Huang Renhao and Yu Weitang. People's Republic of China
Mechanical Industry Standard
Graphical Symbols for Hydraulic Two-way Cartridge Valves
JB/T 59221991
Published and issued by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Format 880×1230
Print Sheet 3/4
Word Count 16.000
First Edition in June 1992
First Printing in June 1992
Print Quantity 1-500
Price 5.00 Yuan
Mechanical Industry Standard Service Network: http://swww.JB.ac.cn1661_6
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