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A valve stem assembly, a main valve structure, and a pressure relief type two-position five-way electromagnetic reversing valve

A two-position, five-way, valve stem technology, applied in the field of reversing valves, can solve the problems of normally closed port opening, solenoid valve malfunction, etc., and achieve the effect of not easy to malfunction, high control safety factor, and good vibration and impact resistance performance.

Active Publication Date: 2022-02-08
CHANGZHOU HENGLI FLUID TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for cut-off two-position five-way electromagnetic reversing valves, the structure of the pilot part generally adopts a normally closed structure. When the power is off, the pilot part is in the closed state. When the power is on, the pilot gas is opened to push the solenoid valve stem. Partially realize the reversing action, but in actual application, it is found that when the normally closed pilot structure is used in a place with large vibration and shock, the normally closed port may be opened due to the impact, causing the solenoid valve to malfunction

Method used

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  • A valve stem assembly, a main valve structure, and a pressure relief type two-position five-way electromagnetic reversing valve
  • A valve stem assembly, a main valve structure, and a pressure relief type two-position five-way electromagnetic reversing valve
  • A valve stem assembly, a main valve structure, and a pressure relief type two-position five-way electromagnetic reversing valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Such as Figure 1~3 As shown, a valve stem assembly is installed in the valve body 1 of the pressure relief type two-position five-way electromagnetic reversing valve, including:

[0084] The valve stem 31, the middle section 31a of the valve stem 31 protrudes outwards around the circumferential direction with an annular sealing cut-off structure 31c; the middle spacer 32 includes two rings of outer sealing structures 32a, two side sealing structures 32b, and two outer sealing structures 32b. The main body 32e connected with the other; the outer sealing structure 32a is sealed with the inner wall of the cavity of the valve body 1, and the first channel 32c for gas to enter the main body 32e is formed between the two outer sealing structures 32a, and the side sealing structure 32b is provided with a channel for gas to flow out. In the second passage 32d of the main body 32e, the sealing cut-off structure 31c blocks the second passage 32d on one side of the sealing struct...

Embodiment 2

[0101] Such as Figure 10~13 As shown, a main valve structure adopts the valve stem assembly 3 in Embodiment 1, including:

[0102] The valve body 1, and the combined structure composed of the rear cover piston assembly 2, the valve stem assembly 3 and the front cover piston assembly 4 connected in sequence; the rear cover piston assembly 2 forms a rear cover piston chamber 11 with one end of the cavity, and the front cover piston assembly 4 and the other end of the cavity form the front cover piston cavity 12, the combined structure moves along a straight line, and in the direction perpendicular to the linear movement, the extrusion area of ​​the rear cover piston assembly 2 for the gas in the rear cover piston cavity 11 is larger than that of the front cover piston The extrusion area of ​​the component 4 for the gas in the piston cavity 12 of the front cover, and the linear movement of the combined structure is performed due to the pressure difference generated by the gas on...

Embodiment 3

[0107] Such as Figure 16~18 As shown, a pressure relief type two-position five-way electromagnetic reversing valve includes the main valve structure in the second embodiment, and the pilot assembly 5; the valve body 1 is provided with an air inlet 13, a first working port 14, a second The working port 15, the pilot air intake channel 16 and the pilot air outlet channel 17, the gas entering from the air inlet 13 enters the front cover piston cavity 12 and the pilot piston cavity of the pilot assembly 5 through the pilot air intake channel 16 respectively, and the pilot assembly 5 is powered on When the power is off, the gas in the pilot piston chamber is introduced into the atmosphere, or, when the power is off, it is introduced into the rear cover piston chamber 11 through the pilot air outlet channel 17; the combined structure performs position switching during the linear motion to realize the air inlet 13 and the first working port. 14, or the communication between the air ...

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Abstract

The invention relates to the technical field of reversing valves, in particular to a valve stem assembly, comprising: a valve stem protruding from a ring-shaped sealing cut-off structure; The side sealing structure is provided with a second passage, and the sealing cut-off structure blocks the second passage on one side of the side sealing structure in the main body during the linear movement of the valve stem; the linear movement of the valve stem is caused by two The side gas is carried out by the pressure difference generated at both ends. The valve stem assembly in the present invention is suitable for being in a pressurized state as a whole, and the direction is switched by opening the second passage on both sides according to the pressure difference on both sides, so it can be applied to the solenoid valve reversing valve whose pilot structure is normally open Among them, the vibration and impact resistance performance is good; the invention also requests protection of a main valve structure and a pressure-relieving two-position five-way electromagnetic reversing valve. The pressure-relief reversing structure is designed through the normally open pilot and the main valve to control safety. High coefficient, less prone to misoperation.

Description

technical field [0001] The invention relates to the technical field of reversing valves, in particular to a valve stem assembly, a main valve structure and a pressure relief type two-position five-way electromagnetic reversing valve. Background technique [0002] At present, for cut-off two-position five-way electromagnetic reversing valves, the structure of the pilot part generally adopts a normally closed structure. When the power is off, the pilot part is in the closed state. When the power is on, the pilot gas is opened to push the solenoid valve stem. Partially realize the reversing action, but in actual application, it is found that when the normally closed pilot structure is used in a place with large vibration and shock, the normally closed port may be opened due to the impact, causing the solenoid valve to malfunction. [0003] In view of the above problems, based on years of rich practical experience and professional knowledge in the engineering application of this...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K11/02F16K31/122F16K31/40F16K31/11
CPCF16K11/02F16K31/1225F16K31/1223F16K31/406F16K31/10
Inventor 刘华玲邱捷王广建申铁柱
Owner CHANGZHOU HENGLI FLUID TECH CO LTD
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