CN203614489U - Overflow valve - Google Patents
Overflow valve Download PDFInfo
- Publication number
- CN203614489U CN203614489U CN201320666996.0U CN201320666996U CN203614489U CN 203614489 U CN203614489 U CN 203614489U CN 201320666996 U CN201320666996 U CN 201320666996U CN 203614489 U CN203614489 U CN 203614489U
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- Prior art keywords
- valve
- valve seat
- seat
- valve core
- valve body
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Abstract
The utility model discloses an overflow valve, which relates to the field of hydraulic control and solves the problems of the existing overflow valve that the stability is poor, and the squeaking can be easily generated. The overflow valve comprises a valve body, a valve core assembly and a pressure regulating device, wherein the valve body is sealed through front and back end covers, the valve core assembly and the pressure regulating assembly are arranged in the valve body, the valve core assembly comprises a valve seat and a valve core, the valve seat is fixedly arranged at one end of a valve cavity, the valve core is embedded in the valve seat, the pressure regulating device comprises a pressure regulating screw rod and a spring, the pressure regulating screw rod penetrates through the front end cover, the spring is connected between the valve core and the pressure regulating screw rod, an oil inlet and an oil overflow opening which are selectively separated by the valve core are formed in the valve body, a throttling opening is formed in the valve seat, oil liquid of the oil inlet can enter the throttling opening to generate hydraulic pressure for pushing the valve core to be opened, the oil liquid can be discharged from the overflow opening, and the system pressure is relieved. The overflow valve has the advantages that the fixed valve seat is adopted, and in addition, the valve core is embedded in the valve seat, so the stability of the valve core assembly is high, vibration cannot easily occur during the oil liquid discharging, and the squeaking noise is avoided; meanwhile, the internal structure of the valve body is simple, and the pressure control is convenient and flexible.
Description
Technical field
The utility model relates to hydraulic control field, is specifically related to a kind of structural stability, without uttering long and high-pitched sounds, and the convenient relief valve flexibly of pressure control.
Background technique
Relief valve is usually used in, in the hydraulic system automation control in each fields such as molding machine, lathe, metallurgy, mine, engineering, being commonly used to unload the system pressure in hydraulic system.General relief valve internal structure design is complicated, and mangetic core assembly poor stability, in the time that relief valve carries out hydraulic pressure unloading, spool can produce vibration under the brute force of pressure oil is impacted, thereby sends ear-piercing whistle, produces great noise, meanwhile, affect the control sensitivity of relief valve.
Model utility content
The defect existing in order to solve above-mentioned technology, the utility model provides a kind of structural stability, without uttering long and high-pitched sounds, the convenient relief valve flexibly of pressure control.
The utility model is realized the technological scheme that above-mentioned technique effect adopts:
A kind of relief valve, comprise the valve body that employing front cover, rear end cover seal and be located at mangetic core assembly and the regulator in described valve body, described mangetic core assembly comprises valve seat and spool, described regulator comprise run through the screw press of described front cover and be connected to described spool and described screw press between spring, wherein, described valve seat is fixed on one end of described valve inner valve pocket, and described valve seat is provided with groove and restriction, and described spool is embedded in the groove of described valve seat.
Above-mentioned a kind of relief valve, described valve body is provided with filler opening and the oil spilling mouth, described filler opening and the described restriction conducting that are cut off by described spool selectivity.
Above-mentioned a kind of relief valve, one end that described screw press stretches into described valve pocket is provided with spring seat, and one end of described spring is socketed on described spring seat.
Above-mentioned a kind of relief valve, is provided with rubber contiguous block between described rear end cover and described valve seat.
Above-mentioned a kind of relief valve, the joining place of described front cover and described valve body is provided with seal ring, and the joining place of described rear end cover and described valve body is provided with seal ring.
Above-mentioned a kind of relief valve, is provided with damper in described filler opening.
The beneficial effects of the utility model are: this relief valve adopts fixing valve seat, and by spool inserted valve seat, make the stability of mangetic core assembly stronger, and in the time that fluid gushes, spool is difficult for producing vibration, has avoided whistler; Meanwhile, valve inner is simple in structure, and pressure control is convenient, flexible.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1-valve body, 2-front cover, 3-rear end cover, 4-valve seat, 5-spool, 6-spring, 7-filler opening, 8-restriction, 9-oil spilling mouth, 10-spring seat, 11-rubber contiguous block, 12-seal ring, 21-screw press, 22-safety cover.
Embodiment
For making that the utility model is had to further understanding, below with reference to Figure of description and specific embodiment, the utility model is described in further detail:
Shown in Fig. 1, a kind of relief valve, comprises the valve body 1 that employing front cover 2, rear end cover 3 seal and is located at mangetic core assembly and the regulator in valve body 1.Mangetic core assembly comprises valve seat 4 and spool 5, regulator comprise run through the screw press 21 of front cover 2 and be connected to spool 5 and screw press 21 between spring 6, the protected cover 22 of rear end cover 3 covers, and has dust-proof effect.Wherein, valve seat 4 is fixed on one end of valve pocket, and valve seat 4 is provided with groove and restriction 8, and spool 5 is embedded in the groove of valve seat 4, and can move forward and backward under external force.Valve body 1 is provided with filler opening 7 and oil spilling mouth 9, between filler opening 7 and oil spilling mouth 9, optionally cuts off by spool 5, and in the time that spool 5 is closed, filler opening 7 and the 9 not conductings of oil spilling mouth, in the time that spool 5 is opened, filler opening 7 and 9 conductings of oil spilling mouth.
When enforcement, valve seat 4 is less than the diameter of valve seat 4 towards one end of front cover 2 towards the diameter of one end of rear end cover 3, valve seat 4 fits tightly between one end of front cover 2 and valve pocket inwall, and be fixed in valve pocket, valve seat 4 keeps slight distance between the outer peripheral surface of one end of rear end cover 3 and valve pocket inwall, form narrow and small fluid passage between the two, filler opening 7 passes through this fluid passage conducting with restriction 8.One end that screw press 21 stretches into valve pocket is provided with spring seat 10, and one end of spring 6 is socketed on spring seat 10.The pre compressed magnitude of spring 6 presets by screw press 21, in the time that the oil liquid pressure at restriction 8 places reaches the prestressing force of spring 6, and spool 5 unlatching that moves to right.In order to strengthen the stability of valve seat 4, between valve seat 4 and rear end cover 3, be provided with the rotten rubber contiguous block 11 of the certain elasticity of tool and corrosion resistant, this rubber contiguous block 11 makes to form crashproof buffering between rear end cover 3 and valve seat 4, and can prevent contingency time, valve seat 4 comes off and impacts rear end cover 3.In order to guarantee the sealing of relief valve, front cover 2 is provided with seal ring 12 with the joining place of valve body 1, and rear end cover 3 is provided with seal ring 12 with the joining place of valve body 1.For mute further, in filler opening 7, be provided with damper.
The working principle of this relief valve is: when original state, spool 5 is tightly fitted on the end face of valve seat 4 under the prestressing force of spring 6, spool 5 is closed, between filler opening 7 and oil spilling mouth 9, cut off not conducting, when fluid constantly enters valve pocket from filler opening 7, fluid enters into restriction 8 from the fluid passage forming between valve seat 4 and valve pocket inwall, in the time that the oil liquid pressure at restriction 8 places reaches the prestressing force that can overcome spring 6, spool 5 moves right, spool 5 is opened, fluid enters valve pocket from restriction 8, then gush from flow-off 9, discharge the system pressure of hydraulic system.After system pressure declines, when the oil liquid pressure at restriction 8 places is not enough to overcome the prestressing force of spring 6, spring 6 promotes spool 5 left and resets, and makes spool 5 get back to initial closed state.By spool 5 automatically opening and closing repeatedly, carry out the discharge degree of hydraulic system, guarantee that the automation control of hydraulic system is carried out in order.
This relief valve adopts fixing valve seat 4, and by spool 5 inserted valve seats 4, makes the stability of mangetic core assembly stronger, and in the time that fluid gushes, spool 5 is difficult for producing vibration, has avoided whistler; Meanwhile, valve inner is simple in structure, and pressure control is convenient, flexible.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications; these changes and improvements all fall in claimed scope of the present utility model, and the protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (6)
1. a relief valve, comprise the valve body that employing front cover, rear end cover seal and be located at mangetic core assembly and the regulator in described valve body, described mangetic core assembly comprises valve seat and spool, described regulator comprise run through the screw press of described front cover and be connected to described spool and described screw press between spring, it is characterized in that, described valve seat is fixed on one end of described valve inner valve pocket, described valve seat is provided with groove and restriction, and described spool is embedded in the groove of described valve seat.
2. a kind of relief valve according to claim 1, is characterized in that, described valve body is provided with filler opening and the oil spilling mouth, described filler opening and the described restriction conducting that are cut off by described spool selectivity.
3. a kind of relief valve according to claim 1, is characterized in that, one end that described screw press stretches into described valve pocket is provided with spring seat, and one end of described spring is socketed on described spring seat.
4. a kind of relief valve according to claim 1, is characterized in that, between described rear end cover and described valve seat, is provided with rubber contiguous block.
5. a kind of relief valve according to claim 1, is characterized in that, the joining place of described front cover and described valve body is provided with seal ring, and the joining place of described rear end cover and described valve body is provided with seal ring.
6. a kind of relief valve according to claim 1 and 2, is characterized in that, in described filler opening, is provided with damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666996.0U CN203614489U (en) | 2013-10-25 | 2013-10-25 | Overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320666996.0U CN203614489U (en) | 2013-10-25 | 2013-10-25 | Overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203614489U true CN203614489U (en) | 2014-05-28 |
Family
ID=50767138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320666996.0U Expired - Fee Related CN203614489U (en) | 2013-10-25 | 2013-10-25 | Overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203614489U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595267A (en) * | 2014-11-27 | 2015-05-06 | 宁波中意液压马达有限公司 | Implanted direct relief valve |
-
2013
- 2013-10-25 CN CN201320666996.0U patent/CN203614489U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104595267A (en) * | 2014-11-27 | 2015-05-06 | 宁波中意液压马达有限公司 | Implanted direct relief valve |
| CN104595267B (en) * | 2014-11-27 | 2017-02-22 | 宁波中意液压马达有限公司 | Implanted direct relief 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: 20140528 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |