CN202082427U - Pneumatic two-position four-way change valve - Google Patents
Pneumatic two-position four-way change valve Download PDFInfo
- Publication number
- CN202082427U CN202082427U CN2011202030732U CN201120203073U CN202082427U CN 202082427 U CN202082427 U CN 202082427U CN 2011202030732 U CN2011202030732 U CN 2011202030732U CN 201120203073 U CN201120203073 U CN 201120203073U CN 202082427 U CN202082427 U CN 202082427U
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- end cap
- pneumatic
- cylinder
- reversing piston
- piston
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Abstract
The utility model relates to a pneumatic two-position four-way change valve. The existing two-position four-way change valve arranged in a motor stops at a 'dead point' position in running, i.e., a gas inlet cavity of a gas distribution chamber is directly communicated with an exhaust port through a sliding block, so that the shut down of a coating machine is resulted in, but the 'dead point' phenomenon of the coating machine is prohibited on an automatic coating production line. Aiming at overcoming the defects, permanent magnets are embedded in a change piston and holes of an upper end cover and a lower end cover, so that the 'dead point' difficulty of the two-position four-way change valve during the process of direction change is overcome by magnet force and friction force.
Description
Technical field
The utility model relates to the reciprocating type pneumatic motor of a kind of air-driven type airless sprayer, spreader or other purposes, relates in particular to the built-in Pneumatic two-position four-way selector valve of its pneumatic motor.
Background technique
Existing air-driven type airless sprayer or air-driven type spreader be made up of pneumatic motor and coating oil hydraulic pump, and pneumatic motor are the cores of air-driven type airless sprayer, for the air-driven type airless sprayer provides reliable power.The pneumatic motor of airless sprayer enters pressurized air incessantly by the distribution changement from upper chamber of air cylinder or cavity of resorption, promote piston and move up or down, and the pressurized air in lower chamber of air cylinder or the epicoele must instantaneously enter atmosphere by relief opening.The two-position four way change valve that existing pneumatic motor is built-in, in running, can be parked in " dead point " position, the air-inlet cavity that is gas distributing chamber directly is communicated with relief opening by slide block, causes spraying machine to quit work, and is forbidding spraying machine " dead point " phenomenon to occur on the spray stream waterline automatically.
Summary of the invention
The utility model provides a kind of Pneumatic two-position four-way valve that " dead point " difficult problem appears in commutation process that overcomes at above-mentioned deficiency.
A kind of Pneumatic two-position four-way selector valve that is built in the pneumatic motor comprises reversing piston, upper end cap, lower end cap, inlays permanent magnet at reversing piston and upper end cap, lower end cap in the hole.
For better effect: reversing piston is arranged between upper end cap, the lower end cap; Upper end cap, lower end cap are fixed on the cylinder.
Reversing piston reaches upper end cap in the stomidium up and down, lower end cap is inlayed permanent magnet in the hole, and in the hole jump ring is set.
Slide block is stuck in the reversing piston groove;
Slide plate is fixed on the distribution piece, and the distribution piece is screwed at cylinder, and lower cover of air cylinder is screwed on cylinder.
The utility model is inlayed permanent magnet at reversing piston and upper end cap, lower end cap in the hole on the basis of existing two-position four-way valve, the variation by magnet power, frictional force overcomes two-position four-way valve and " dead point " difficult problem occurs at commutation process.
When reversing piston when upper, last pilot valve suction port and reversing piston bottom together with, promptly there is pressurized air the reversing piston lower end, reversing piston top is communicated with atmosphere.The reversing piston upper-end surface contacts with upper end cap, and reversing piston upper-end surface magnet and upper end cap magnet attract each other; When cylinder piston moves upward, contact with guide's spool, and continue compression guide spool, the upper end is by guide's valve body switching gas circuit, and A and B are obstructed, and B and pressurized air are connected, C and D gas circuit are communicated with atmosphere.Pressurized air promotes reversing piston and moves downward, continuous variation along with move distance, the suction of upper end magnet is more and more littler, the suction of lower end is increasing, and frictional force becomes kinetic friction from static friction, resistance to motion also diminishes suddenly, thereby makes piston can't rest on the neutral position under the stack of multiple power, thereby has overcome " dead point " problem of reversing piston.Reversing piston drives slide block movement, realizes the switching of distribution piece gas circuit, reach pressurized air and enter cylinder piston top, and the pressurized air of cylinder piston bottom is communicated with F, enters atmosphere.Reciprocal reversing principle is same as described above, and just gas circuit is reverse.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the utility model air-driven type two-position four way change valve one structural representation.
Embodiment
See Fig. 1, reversing piston 10 is arranged between upper end cap 11, the lower end cap 4, and reversing piston 10 slides up and down in cylinder 1 hole; Upper end cap 11, lower end cap are fixed on the cylinder 1; Slide plate 9 is fixed on the distribution piece 7, and distribution piece 7 is screwed at cylinder 1; Lower cover of air cylinder 3 is screwed on cylinder 1; Inlay permanent magnet 5 at reversing piston 2 and upper end cap 11, lower end cap in 4 holes, and prevent that with jump ring 6 permanent magnet 5 from skidding off, two permanent magnet 5 assembling forms are that two two-phases are inhaled; Slide block 8 is stuck in reversing piston 10 grooves.
E is the total suction port of pressurized air, and pressurized air enters into lower chamber of air cylinder or epicoele by distribution piece 7, and reversing piston 10 upper and lower cavities enter pressurized air simultaneously, and cylinder piston 2 promotes cylinder piston 2 and moves up or down under compressed-air actuated effect.When moving to the end, upper end, cylinder piston promotes pilot valve work, the pressurized air of reversing piston 10 epicoeles passes through last pilot valve inlet hole B again to last pilot valve exhaust port A, be communicated with atmosphere, simultaneously because reversing piston 10 cavity of resorptions are connected with pressurized air always, reversing piston 10 is subjected to two power, pressurized air power and magnetic force simultaneously.When pressurized air greater than magnetic force, promoting reversing piston 10 drive slide blocks 8 moves upward, variation along with move distance, the magnetic force of bottom is more and more littler, and the magnetic force on reversing piston 10 tops is increasing, pressurized air, under the effect of lower magnetic force and three kinds of power of frictional force, make reversing piston 2 can't rest on air-inlet cavity that gas distributing chamber promptly appears in the neutral position by slide block 8 and the situation that relief opening F directly is communicated with, promptly overcome commutation " dead point " problem.When reversing piston 10 moves to the upper end, switch the gas circuit of cylinder 1, i.e. epicoele air inlet, cavity of resorption is connected atmosphere by the F mouth.So go round and begin again, realized the to-and-fro motion of pneumatic motor.
Claims (5)
1. one kind is built in the interior Pneumatic two-position four-way selector valve of pneumatic motor, comprise cylinder (1), reversing piston (10), upper end cap (11), lower end cap (4), it is characterized in that: inlay permanent magnet (5) in the hole at reversing piston (10) and upper end cap (11), lower end cap (4).
2. Pneumatic two-position four-way selector valve as claimed in claim 1 is characterized in that: reversing piston (10) is arranged between upper end cap (11), the lower end cap (4); Upper end cap (11), lower end cap (4) are fixed on the cylinder (1).
3. Pneumatic two-position four-way selector valve as claimed in claim 1 is characterized in that: reversing piston (10) reaches upper end cap (11) in the stomidium up and down, lower end cap (4) is inlayed permanent magnet (5) in the hole, and jump ring (6) is set in the hole.
4. Pneumatic two-position four-way selector valve as claimed in claim 1 is characterized in that: slide block (8) is stuck in reversing piston (10) groove.
5. Pneumatic two-position four-way selector valve as claimed in claim 1 or 2 is characterized in that: slide plate (9) is fixed on the distribution piece (7), and distribution piece (7) is screwed in cylinder (1), and lower cover of air cylinder (3) is screwed on cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202030732U CN202082427U (en) | 2011-06-16 | 2011-06-16 | Pneumatic two-position four-way change valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202030732U CN202082427U (en) | 2011-06-16 | 2011-06-16 | Pneumatic two-position four-way change valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202082427U true CN202082427U (en) | 2011-12-21 |
Family
ID=45343056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202030732U Expired - Lifetime CN202082427U (en) | 2011-06-16 | 2011-06-16 | Pneumatic two-position four-way change valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202082427U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418798A (en) * | 2011-06-16 | 2012-04-18 | 重庆长江涂装设备有限责任公司 | Pneumatic two-position four-way reversing valve |
| CN104100734A (en) * | 2014-07-15 | 2014-10-15 | 瑞安市洛伊德机车部件有限公司 | Air scavenging valve |
| CN106545673A (en) * | 2015-12-07 | 2017-03-29 | 巩高铄 | A kind of guiding valve |
-
2011
- 2011-06-16 CN CN2011202030732U patent/CN202082427U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102418798A (en) * | 2011-06-16 | 2012-04-18 | 重庆长江涂装设备有限责任公司 | Pneumatic two-position four-way reversing valve |
| CN104100734A (en) * | 2014-07-15 | 2014-10-15 | 瑞安市洛伊德机车部件有限公司 | Air scavenging valve |
| CN104100734B (en) * | 2014-07-15 | 2016-07-06 | 瑞安市洛伊德机车部件有限公司 | A kind of scavenging air valve |
| CN106545673A (en) * | 2015-12-07 | 2017-03-29 | 巩高铄 | A kind of guiding valve |
| CN106545673B (en) * | 2015-12-07 | 2021-08-13 | 巩高铄 | Slide valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111221 |
|
| CX01 | Expiry of patent term |