CN104074823B - A kind of spacing return check valve - Google Patents
A kind of spacing return check valve Download PDFInfo
- Publication number
- CN104074823B CN104074823B CN201410289632.4A CN201410289632A CN104074823B CN 104074823 B CN104074823 B CN 104074823B CN 201410289632 A CN201410289632 A CN 201410289632A CN 104074823 B CN104074823 B CN 104074823B
- Authority
- CN
- China
- Prior art keywords
- piston
- plunger shaft
- spool
- die cavity
- oil
- 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.)
- Expired - Fee Related
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Abstract
The invention discloses a kind of spacing return check valve, the oil inlet passage being positioned at valve body left upper portion is set at valve inner, the oil discharge passage of lower right side, it is positioned at plunger shaft and the spool chamber at middle part, plunger shaft and spool chamber are located along the same line horizontal-extending, plunger shaft connects with oil inlet passage, spool chamber connects with oil discharge passage, drainback passage it is connected between plunger shaft and oil discharge passage, bottom plunger shaft, sidewall is provided with tapped through hole, caging bolt coordinates with this tapped through hole and stretches in plunger shaft, the stepped die cavity of piston base setting table, the step die cavity partial depth near piston termination is less than the degree of depth near piston tail part, piston reset spring and valve core reseting spring are respectively placed at piston and spool tail end.Present invention, avoiding pressure oil and directly spool afterbody is produced pressure, reduce the active force between piston and spool, meanwhile, make check valve can not pass through effect between piston and spool and can be achieved with oil return, it is to avoid the damage of spool and piston.
Description
Technical field
The present invention relates to check valve manufacturing technology field, especially a kind of spacing return check valve.
Background technology
Traditional check valve promotes piston typically via controlling oil piston tail, and then is promoted spool to realize the connection between oil inlet passage and oil discharge passage by piston termination, it is achieved oil return.The pressure oil of oil inlet passage typically directly acts on spool tail end, add returning spring and act on the active force of spool tail end, make to control liquid promotes piston need to overcome two above power simultaneously, at this moment produces relatively noticeable effort between piston termination and spool termination so that 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 and directly spool afterbody is produced pressure, reduce the active force between piston and spool, simultaneously, make check valve can not pass through effect between piston and spool and can be achieved with oil return, it is to avoid the damage of spool and piston.
In order to realize foregoing invention purpose, the present invention provides techniques below scheme:
A kind of spacing return check valve, including valve body, piston, spool, caging bolt, piston reset spring and valve core reseting spring,
Arrange at described valve inner and be positioned at the oil inlet passage of described valve body left upper portion, the oil discharge passage of lower right side, the plunger shaft being positioned at middle part and spool chamber,
Described plunger shaft and described spool chamber are located along the same line horizontal-extending,
Described plunger shaft connects with described oil inlet passage, and described spool chamber connects with described oil discharge passage,
It is connected to drainback passage between described plunger shaft and described oil discharge passage,
Bottom described plunger shaft, sidewall is provided with tapped through hole, and described caging bolt coordinates with this tapped through hole and stretches in described plunger shaft,
The described stepped die cavity of piston base setting table, the described step die cavity partial depth near described piston termination less than near the degree of depth of described piston tail part,
Described piston reset spring and described valve core reseting spring are respectively placed at described piston and described spool tail end.
Further, when described caging bolt stretches into described step die cavity when the part of described piston tail, described step die cavity is partially covered on, near described piston termination, the position that described drainback passage is connected with plunger shaft,
When described caging bolt is positioned at described step die cavity when the part of described piston termination, described plunger shaft connects 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, it is to avoid spool afterbody is directly produced pressure by pressure oil, reduces the active force between piston and spool.By the design to caging bolt and piston, make check valve can not pass through effect between piston and spool and can be achieved with oil return, it is to avoid the damage of spool and piston.
Accompanying drawing explanation
Fig. 1 is a kind of spacing return check valve drainback passage of the present invention cross-sectional schematic when not using;
Fig. 2 is cross-sectional schematic during a kind of spacing return check valve drainback passage of the present invention use;
Fig. 3 is the cross-sectional schematic of piston of the present invention.
Detailed description of the invention
Describing the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, and protection scope of the present invention should not have any restriction effect.
The spacing return check valve of one as Figure 1-3, including valve body 1, piston 3, spool 2, caging bolt 4, piston reset spring 5 and valve core reseting spring 6,
Arrange inside valve body 1 and be positioned at the oil inlet passage 11 of valve body 1 left upper portion, the oil discharge passage 12 of lower right side, the plunger shaft 13 being positioned at middle part and spool chamber 14,
Plunger shaft 13 and spool chamber 14 are located along the same line horizontal-extending,
Plunger shaft 13 connects with oil inlet passage 11, and spool chamber 14 connects with oil discharge passage 12,
Drainback passage 15 it is connected between plunger shaft 13 and oil discharge passage 12,
Bottom plunger shaft 13, sidewall is provided with tapped through hole, and caging bolt 4 coordinates with this tapped through hole and stretches in plunger shaft 13,
The stepped die cavity of setting table bottom piston 3, step die cavity part 32 degree of depth near piston 3 termination less than the degree of depth of part 31 near piston 3 afterbody,
Piston reset spring 5 and valve core reseting spring 6 are respectively placed at piston 3 and spool 2 tail end.
When caging bolt 4 stretches into step die cavity when the part 31 of piston 3 afterbody, the step die cavity part 32 near piston 3 termination covers the position that drainback passage 15 is connected with plunger shaft 13,
When caging bolt 4 is positioned at step die cavity when the part 32 of piston 3 termination, plunger shaft 13 connects with drainback passage 15.
When needing oil-feed, caging bolt 4 end is positioned at the step die cavity part 31 near piston 3 afterbody, control oil and enter plunger shaft 13, piston 3 is promoted to advance from afterbody, piston 3 termination promotes spool 2, makes oil inlet passage 11 connect with oil discharge passage 12, and pressure oil enters oil discharge passage 12, controlling oil and stop input, piston 3 resets under the effect of piston reset spring 5.When needing oil return, turn caging bolt 4 is until its end is positioned at the step die cavity part 32 near piston 3 termination and stops, owing to 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 connects with oil discharge passage 12, realize oil return, after oil return completes, input controls oil, promoting piston 3 to make caging bolt 4 be positioned at the stairstepping die cavity part 31 near piston 3 afterbody, spinning reduction bolt makes its termination stretch in stairstepping die cavity.
A kind of spacing return check valve of the present invention, by the layout to spool, oil inlet passage and oil discharge passage position, it is to avoid spool afterbody is directly produced pressure by pressure oil, reduces the active force between piston and spool.By the design to caging bolt and piston, make check valve can not pass through effect between piston and spool and can be achieved with oil return, it is to avoid the damage of spool and piston.
Claims (2)
1. a spacing return check valve, it is characterised in that include valve body, piston, spool, caging bolt, piston reset spring and valve core reseting spring,
Arrange at described valve inner and be positioned at the oil inlet passage of described valve body left upper portion, the oil discharge passage of lower right side, the plunger shaft being positioned at middle part and spool chamber,
Described plunger shaft and described spool chamber are located along the same line horizontal-extending,
Described plunger shaft connects with described oil inlet passage, and described spool chamber connects with described oil discharge passage,
It is connected to drainback passage between described plunger shaft and described oil discharge passage,
Bottom described plunger shaft, sidewall is provided with tapped through hole, and described caging bolt coordinates with this tapped through hole and stretches in described plunger shaft,
The described stepped die cavity of piston base setting table, described step die cavity near the degree of depth of the part of described piston termination less than the degree of depth of part near described piston tail,
Described piston reset spring and described valve core reseting spring are respectively placed at described piston tail and described spool tail end.
2. a kind of spacing return check valve as claimed in claim 1, it is characterized in that, when described caging bolt stretches into described step die cavity when the part of described piston tail, described step die cavity is partially covered on, near described piston termination, the position that described drainback passage is connected with plunger shaft
When described caging bolt is positioned at described step die cavity when the part of described piston termination, described plunger shaft connects 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 |
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CN104074823A CN104074823A (en) | 2014-10-01 |
CN104074823B true CN104074823B (en) | 2016-07-06 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201410289632.4A Expired - Fee Related CN104074823B (en) | 2014-06-26 | 2014-06-26 | A kind of spacing return check valve |
Country Status (1)
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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 |
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CN104074823A (en) | 2014-10-01 |
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Granted publication date: 20160706 Termination date: 20170626 |