CN203784002U - Pilot-operated type check valve - Google Patents
Pilot-operated type check valve Download PDFInfo
- Publication number
- CN203784002U CN203784002U CN201420183904.8U CN201420183904U CN203784002U CN 203784002 U CN203784002 U CN 203784002U CN 201420183904 U CN201420183904 U CN 201420183904U CN 203784002 U CN203784002 U CN 203784002U
- Authority
- CN
- China
- Prior art keywords
- valve body
- pilot
- screw
- spool
- valve
- 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
Links
- 238000007789 sealing Methods 0.000 abstract description 8
- 239000003921 oil Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
Abstract
The utility model discloses a pilot-operated type check valve, which comprises a valve body, a pilot-operated valve core and a plug screw, wherein a sealing slot is arranged on the outer circle of the right end of the valve body, an O-type ring A is arranged in the sealing slot, a main valve core is arranged in the valve body, a pilot-operated valve core, a spring A and an impedance screw are orderly arranged in the main valve core from right to left, a shaft head, a shaft neck, an outer thread, an A mouth and a sealing slot are orderly arranged outside the left end of the valve body from left to right, an inner thread is arranged on the left end of the valve body, a through hole is drilled on a right cylindrical surface of the pilot-operated valve core, the through hole is communicated with a center hole of the pilot-operated valve core, the plug screw is connected with an inner thread of the left end of the valve body, a O-type ring C is arranged in the middle, and a spring B is arranged between an inner hole of the plug screw and the impedance screw. The pilot-operated type check valve is simple to assemble, convenient to debug and maintain and excellent in sealing without leakage.
Description
Technical field
The utility model belongs to hydraulic transmission technology field, particularly a kind of guiding one-way valve, and this guiding one-way valve is mainly used in, in the hydraulic system of engineering machinery, supporting the use with executive component, plays the logical oil of forward, oppositely oil sealing maintenance load.
Background technique
At present, along with industrial expansion, valve has obtained increasing utilization in nearly all fluid field, in the hydraulic system of engineering machinery, often use one-way valve, one-way valve claims again safety check or check valve, stops oil or current reverse flow for hydraulic system.
Domestic common guiding one-way valve, as shown in Figure 1, basic functional principle is: the pressurization of P mouth, main valve plug 6 is opened, and high pressure oil enters executive component by A mouth; After P mouth pressure releases, when high pressure oil acts on A mouth, main valve plug 6 and guide's spool 3 are closed, and do not allow to leak.In actual use, have following defect: (1), main valve plug 6 adopt integral quenching, endoporus machining accuracy is difficult to ensure; (2), guide's spool 3 has a facing cut flat, thereby guidance quality is poor in main valve plug 6 holes, the poor sealing of guide's spool 3, easily causes the leakage of valve simultaneously; (3), valve body 1 left end is connected with the internal thread of plug screw 8, to assembling and debugging and safeguard and make troubles.
Summary of the invention
The purpose of this utility model will solve the problems of the technologies described above.
The purpose of this utility model is achieved in that guiding one-way valve, comprises valve body, guide's spool, plug screw, on valve body right-hand member cylindrical, is provided with seal groove, is provided with O type circle A in seal groove; In valve body, be provided with main valve plug, in main valve plug, be disposed with from right to left guide's spool, spring A, impedance screw, it is characterized in that: described valve body left end outside is from left to right disposed with spindle nose, axle journal, outside thread, A mouth, seal groove; Described valve body left end is provided with internal thread.
The right-hand member cylndrical surface of described guide's spool drills through hole, and through hole communicates with the center hole of guide's spool.
Described plug screw is connected with valve body left end internal thread, and centre is provided with O type circle C; Between the endoporus of plug screw and impedance screw, be provided with spring B.
The utility model assembling is simple, is convenient to debugging and safeguards, good seal, does not leak.
Brief description of the drawings
Fig. 1 is the guiding one-way valve structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is schematic diagram of the present utility model.
In figure: 1. valve body; 2.O type circle A; 3. guide's spool; 4. spring A; 5. impedance screw; 6. main valve plug; 7. spring B; 8. plug screw; 9.O type circle B; 10.O type circle C.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to restriction of the present utility model:
Guiding one-way valve, comprises valve body 1, guide's spool 3, plug screw 8, on valve body 1 right-hand member cylindrical, is provided with seal groove, is provided with O type circle A2 in seal groove; In valve body 1, be provided with main valve plug 6, be disposed with from right to left guide's spool 3, spring A4, impedance screw 5 in main valve plug 6, valve body 1 left end outside is from left to right disposed with spindle nose, axle journal, outside thread, A mouth, seal groove; Valve body 1 left end is provided with internal thread; The right-hand member cylndrical surface of guide's spool 3 drills through hole, and through hole communicates with the center hole of guide's spool 3; Plug screw 8 is connected with valve body 1 left end internal thread, and centre is provided with O type circle C10; Between the endoporus of plug screw 8 and impedance screw 5, be provided with spring B 7.
When concrete enforcement, change main valve plug 6 into outer surface nitriding treatment by integral quenching, not nitrogenize of endoporus, can carry out fine finishing, and technology capability is good, has ensured precision; Guide's spool 3 is holed by the flat cylindrical that changes into of a facing cut, both ensure the fundamental function of its hydraulic principle, and can make again it in the hole of main valve plug 6, can not produce when axial motion crooked, improved sealing reliability, former valve body 1 and plug screw 8 part-structures are integrated, are convenient to assembling, debugging and safeguard.
Guiding one-way valve is arranged in hydraulic system, supports the use with executive component (as oil cylinder), while normally work, the pressurization of P mouth, main valve plug 6 is opened, and hydraulic oil enters oil cylinder through A mouth; When P mouth pressure releases, high pressure oil acting in opposition is in the time of A mouth, and main valve plug 6 and guide's spool 3 all need to close sealing, without leaking, with locked cylinder, prevents its landing; Can release A mouth with push rod promotion guide spool 3 is hydraulic oil in oil cylinder; The major function of this guiding one-way valve is equivalent to hydraulic lock.
Claims (3)
1. guiding one-way valve, comprises valve body (1), guide's spool (3), plug screw (8), on valve body (1) right-hand member cylindrical, is provided with seal groove, is provided with O type circle A(2 in seal groove); In valve body (1), be provided with main valve plug (6), in main valve plug (6), be disposed with from right to left guide's spool (3), spring A(4), impedance screw (5), it is characterized in that: described valve body (1) left end outside is from left to right disposed with spindle nose, axle journal, outside thread, A mouth, seal groove; Described valve body (1) left end is provided with internal thread.
2. guiding one-way valve according to claim 1, is characterized in that: the right-hand member cylndrical surface of described guide's spool (3) drills through hole, and through hole communicates with the center hole of guide's spool (3).
3. guiding one-way valve according to claim 1, is characterized in that: described plug screw (8) is connected with valve body (1) left end internal thread, and centre is provided with O type circle C(10); Between the endoporus of plug screw (8) and impedance screw (5), be provided with spring B (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183904.8U CN203784002U (en) | 2014-04-16 | 2014-04-16 | Pilot-operated type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183904.8U CN203784002U (en) | 2014-04-16 | 2014-04-16 | Pilot-operated type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784002U true CN203784002U (en) | 2014-08-20 |
Family
ID=51320194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420183904.8U Expired - Fee Related CN203784002U (en) | 2014-04-16 | 2014-04-16 | Pilot-operated type check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784002U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
-
2014
- 2014-04-16 CN CN201420183904.8U patent/CN203784002U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065359A (en) * | 2015-08-13 | 2015-11-18 | 山东常林机械集团股份有限公司 | Safety oil supplementing valve for multi-path valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140820 |