CN104074823A - Limiting return check valve - Google Patents
Limiting return check valve Download PDFInfo
- Publication number
- CN104074823A CN104074823A CN201410289632.4A CN201410289632A CN104074823A CN 104074823 A CN104074823 A CN 104074823A CN 201410289632 A CN201410289632 A CN 201410289632A CN 104074823 A CN104074823 A CN 104074823A
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- CN
- China
- Prior art keywords
- piston
- cavity
- valve
- oil
- spool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a limiting return check valve. An oil inlet channel located at the upper left side of a valve body, an oil outlet channel located at the lower right side of the valve body, a piston cavity located in the middle of the valve body and a valve element chamber are arranged inside the valve body and the piston cavity and the valve element cavity extend horizontally on a same straight line; the piston cavity is communicated with the oil inlet channel, the valve element cavity is communicated with the oil outlet channel, and an oil return channel is connected between the piston cavity and the oil outlet channel; a thread through hole is formed in the bottom side wall of the piston cavity, and the limit bolt and the thread through hole are matched to protrude into the piston cavity; a ladder-shaped cavity is formed in the bottom of a piston, a part of the ladder-shaped cavity nearby a piston tip is less than that of a tail part of the piston, and a piston reset spring and a valve element reset spring are respectively arranged at the tail ends of the piston and the valve core. According to the limiting return check valve provided by the invention, the pressure on the tail of the valve core can be directly generated by pressure oil, therefore the applied force between the piston and the valve element can be reduced; meanwhile, oil return can be realized by a check valve without the function between the piston and the valve element, therefore the damage on the valve element and the piston can be prevented.
Description
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Technical field
The present invention relates to one-way valve manufacturing technology field, especially a kind of spacing return check valve.
Background technique
Traditional one-way valve generally promotes piston by controlling oily piston tail, and then realizes the connection between oil inlet passage and oil discharge passage by piston termination promotion spool, realizes oil return.The pressure oil of oil inlet passage acts directly on spool tail end conventionally, add returning spring and act on the active force of spool tail end, make to control liquid promotion piston and need overcome above two power simultaneously, at this moment between piston termination and spool termination, produce larger active force, spool and piston are easily damaged.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of spacing return check valve of the present invention is proposed, avoid pressure oil directly spool afterbody to be produced to pressure, reduce the active force between piston and spool, simultaneously, make one-way valve just can not realize oil return by effect between piston and spool, avoided the damage of spool and piston.
In order to realize foregoing invention object, the invention provides following technological scheme:
A kind of spacing return check valve, comprises valve body, piston, spool, caging bolt, piston reset spring and valve core reseting spring,
Described valve inner setting be positioned at oil inlet passage, the lower right side of described valve body left upper portion oil discharge passage, be positioned at piston cavity and the spool chamber at middle part,
Described piston cavity and the described spool chamber horizontal-extending that is located along the same line,
Described piston cavity is communicated with described oil inlet passage, and described spool chamber is communicated with described oil discharge passage,
Between described piston cavity and described oil discharge passage, be connected with drainback passage,
Described piston cavity bottom sidewall is provided with tapped through hole, and described caging bolt coordinates and stretches in described piston cavity with this tapped through hole,
Described piston base arranges stepped shape die cavity, and described stepped shape die cavity is less than the degree of depth near described piston tail part near the partial depth of described piston termination,
Described piston reset spring and described valve core reseting spring are placed in respectively described piston and described spool tail end.
Further, in the time that described caging bolt stretches into described stepped shape die cavity near the part of described piston tail, described stepped shape die cavity covers near the part of described piston termination the position that described drainback passage is connected with piston cavity,
In the time that described caging bolt is positioned at described stepped shape die cavity near the part of described piston termination, described piston cavity is communicated with described drainback passage.
A kind of spacing return check valve of the present invention, by the layout to spool, oil inlet passage and oil discharge passage position, has avoided pressure oil directly spool afterbody to be produced to pressure, has reduced the active force between piston and spool.By the design to caging bolt and piston, make one-way valve just can not realize oil return by effect between piston and spool, avoid the damage of spool and piston.
Brief description of the drawings
Fig. 1 is the cross-sectional schematic of a kind of spacing return check valve drainback passage of the present invention while not using;
Cross-sectional schematic when Fig. 2 is a kind of spacing return check valve drainback passage use of the present invention;
Fig. 3 is the cross-sectional schematic of piston of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should not have any restriction to protection scope of the present invention.
The spacing return check valve of one as Figure 1-3, comprises valve body 1, piston 3, spool 2, caging bolt 4, piston reset spring 5 and valve core reseting spring 6,
At the inner oil discharge passage 12 that the oil inlet passage 11, the lower right side that are positioned at valve body 1 left upper portion be set of valve body 1, be positioned at piston cavity 13 and the spool chamber 14 at middle part,
Piston cavity 13 and spool chamber 14 horizontal-extending that is located along the same line,
Piston cavity 13 is communicated with oil inlet passage 11, and spool chamber 14 is communicated with oil discharge passage 12,
Between piston cavity 13 and oil discharge passage 12, be connected with drainback passage 15,
Piston cavity 13 bottom sidewalls are provided with tapped through hole, and caging bolt 4 coordinates and stretches in piston cavity 13 with this tapped through hole,
Piston 3 bottoms arrange stepped shape die cavity, and stepped shape die cavity is less than the degree of depth near the part 31 of piston 3 afterbodys near part 32 degree of depth of piston 3 terminations,
Piston reset spring 5 and valve core reseting spring 6 are placed in respectively piston 3 and spool 2 tail ends.
In the time that caging bolt 4 stretches into stepped shape die cavity near the part 31 of piston 3 afterbodys, stepped shape die cavity covers near the part 32 of piston 3 terminations the position that drainback passage 15 is connected with piston cavity 13,
In the time that caging bolt 4 is positioned at stepped shape die cavity near the part 32 of piston 3 terminations, piston cavity 13 is communicated with drainback passage 15.
While needing oil-feed, caging bolt 4 ends are positioned at the part 31 of stepped shape die cavity near piston 3 afterbodys, control oil and enter piston cavity 13, promoting piston 3 from afterbody advances, piston 3 terminations promote spool 2, and oil inlet passage 11 and oil discharge passage 12 are communicated with, and pressure oil enters oil discharge passage 12, control oil and stop input, piston 3 resets under the effect of piston reset spring 5.While needing oil return, turn caging bolt 4 is until its end is positioned at stepped shape die cavity stops near the part 32 of piston 3 terminations, because piston reset spring 5 is in the state of stretching all the time, piston 3 moves to its caudal directions under the pulling of piston reset spring 5, at this moment, drainback passage 15 is communicated with oil discharge passage 12, realize oil return, input control oil after oil return completes, promote piston 3 and make caging bolt 4 be positioned at the part 31 of stepped shaft die cavity near piston 3 afterbodys, rotary reset bolt stretches in stepped shaft die cavity its termination.
A kind of spacing return check valve of the present invention, by the layout to spool, oil inlet passage and oil discharge passage position, has avoided pressure oil directly spool afterbody to be produced to pressure, has reduced the active force between piston and spool.By the design to caging bolt and piston, make one-way valve just can not realize oil return by effect between piston and spool, avoid the damage of spool and piston.
Claims (2)
1. a spacing return check valve, is characterized in that, comprises valve body, piston, spool, caging bolt, piston reset spring and valve core reseting spring,
Described valve inner setting be positioned at oil inlet passage, the lower right side of described valve body left upper portion oil discharge passage, be positioned at piston cavity and the spool chamber at middle part,
Described piston cavity and the described spool chamber horizontal-extending that is located along the same line,
Described piston cavity is communicated with described oil inlet passage, and described spool chamber is communicated with described oil discharge passage,
Between described piston cavity and described oil discharge passage, be connected with drainback passage,
Described piston cavity bottom sidewall is provided with tapped through hole, and described caging bolt coordinates and stretches in described piston cavity with this tapped through hole,
Described piston base arranges stepped shape die cavity, and described stepped shape die cavity is less than the degree of depth near described piston tail part near the partial depth of described piston termination,
Described piston reset spring and described valve core reseting spring are placed in respectively described piston and described spool tail end.
2. a kind of spacing return check valve as claimed in claim 1, it is characterized in that, in the time that described caging bolt stretches into described stepped shape die cavity near the part of described piston termination, described stepped shape die cavity covers near the part of described piston termination the position that described drainback passage is connected with piston cavity
In the time that described caging bolt is positioned at described stepped shape die cavity near the part of described piston termination, described piston cavity is communicated with described drainback passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289632.4A CN104074823B (en) | 2014-06-26 | 2014-06-26 | A kind of spacing return check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289632.4A CN104074823B (en) | 2014-06-26 | 2014-06-26 | A kind of spacing return check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104074823A true CN104074823A (en) | 2014-10-01 |
| CN104074823B CN104074823B (en) | 2016-07-06 |
Family
ID=51596339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410289632.4A Expired - Fee Related CN104074823B (en) | 2014-06-26 | 2014-06-26 | A kind of spacing return check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104074823B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1233328A (en) * | 1968-12-12 | 1971-05-26 | ||
| DE3631463A1 (en) * | 1986-09-16 | 1988-03-17 | Teves Gmbh Alfred | Pressure-retaining valve |
| WO1994020778A1 (en) * | 1993-03-02 | 1994-09-15 | Sandvik Ab | One-way valve for automatic or manual actuation in holders for chain-saw guidebars |
| CN1989364A (en) * | 2004-07-12 | 2007-06-27 | 迪芬巴赫控制系统股份有限公司 | Releasable non-return valve |
| CN103291980A (en) * | 2013-06-09 | 2013-09-11 | 山东派克诺尔机器有限公司 | Air control hydraulic one-way valve |
| CN103470564A (en) * | 2013-09-22 | 2013-12-25 | 太仓康茂电子有限公司 | Pilot-operated check valve |
| CN103671318A (en) * | 2012-09-20 | 2014-03-26 | 山重建机有限公司 | Pilot type flow-controllable check valve |
-
2014
- 2014-06-26 CN CN201410289632.4A patent/CN104074823B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1233328A (en) * | 1968-12-12 | 1971-05-26 | ||
| DE3631463A1 (en) * | 1986-09-16 | 1988-03-17 | Teves Gmbh Alfred | Pressure-retaining valve |
| WO1994020778A1 (en) * | 1993-03-02 | 1994-09-15 | Sandvik Ab | One-way valve for automatic or manual actuation in holders for chain-saw guidebars |
| CN1989364A (en) * | 2004-07-12 | 2007-06-27 | 迪芬巴赫控制系统股份有限公司 | Releasable non-return valve |
| CN103671318A (en) * | 2012-09-20 | 2014-03-26 | 山重建机有限公司 | Pilot type flow-controllable check valve |
| CN103291980A (en) * | 2013-06-09 | 2013-09-11 | 山东派克诺尔机器有限公司 | Air control hydraulic one-way valve |
| CN103470564A (en) * | 2013-09-22 | 2013-12-25 | 太仓康茂电子有限公司 | Pilot-operated check valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104074823B (en) | 2016-07-06 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20170626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |