CN2839690Y - Superimposed relief valve - Google Patents
Superimposed relief valve Download PDFInfo
- Publication number
- CN2839690Y CN2839690Y CN 200520043694 CN200520043694U CN2839690Y CN 2839690 Y CN2839690 Y CN 2839690Y CN 200520043694 CN200520043694 CN 200520043694 CN 200520043694 U CN200520043694 U CN 200520043694U CN 2839690 Y CN2839690 Y CN 2839690Y
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- China
- Prior art keywords
- valve
- cylinder
- valve seat
- spool
- section
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- Expired - Lifetime
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Abstract
The utility model discloses a stacked overflow valve, which is composed of an overflow valve inserter and a stacked body, wherein the overflow valve inserter is composed of a valve seat, a valve core, a pressure adjusting spring, etc. The valve core forms a frustum shape, the right side of an oil inlet of the valve seat is provided with a section of cylinder in an extending way, and the inside of the cylinder is provided with a cylinder blind hole which is communicated with the oil inlet of the valve seat; the right end of the frustum of the valve core is provided with a section of cylinder in an extending way, and the outer lateral surface of the cylinder section of the valve core is also provided with an axial spiral groove. In the utility model, the cylinder section of the valve core is matched with the blind hole of the cylindrical body in the valve seat to guide, and the radial deflection of the conical sealing of the valve core and the valve seat can not occur; thus, the sealing is reliable, and the leakage can not occur; moreover, the outer lateral surface of the cylinder section of the valve core is provided with the axial spiral groove to form damping and the stability of pressure can be ensured. The utility model can not only be used as a general direct-acting overflow valve but also can be used as a safety valve which is installed in a stacked way.
Description
Technical field
The utility model relates to the hydraulic system element, is specifically related to the overlapping relief valve in the hydraulic system.
Background technique
Existing overlapping hydraulic pressure relief valve has direct-acting type and leading type from the structural principle branch, and direct-acting type is made up of valve body, taper or spherical valve core and pressure adjusting spring, and its pressure controling precision is low, often makes pilot valve and uses; Another kind is by pilot valve and two-stage or three grades of pilot operated compound relief valves that concentric main valve is formed, and this valve allows pressure is regulated minutely, and pressure controling precision is higher.But because the spool of pilot valve is taper or spherical, no matter be direct-acting type or leading type, generally all there is certain leakage rate, and working pressure is also stable inadequately, therefore locate near executive component (oil cylinder, oil motor) in hydraulic system, often will use a kind of safety valve, so that when work, can prevent the excess pressure that causes because of hydraulic shock, and valve does not have obvious internal leakage when static, thereby makes executive component remain on certain position.
Summary of the invention
Technical problem to be solved in the utility model is to overcome deficiency of the prior art, and a kind of overlapping relief valve that safety valve uses, that pressure stability is leaked, can be made to nothing of doing is provided.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions.
A kind of overlapping relief valve, form by relief valve plug-in unit and stack valve body, wherein the relief valve plug-in unit is made up of valve seat, spool, pressure adjusting spring, valve pocket, spring seat, adjustment sleeve, nut and adjustable lever, described spool is a taper type, wherein, one section cylinder is extended on right side at described valve seat filler opening, is provided with a cylindrical body blind hole in this cylinder and is communicated with the valve seat filler opening; Extend one section cylindrical body at described spool frustum right-hand member, the diameter and the length of cylinder blind hole are complementary in this cylindrical diameter and length and the described valve seat.
Above-mentioned overlapping relief valve, wherein, the outer side surface of described spool shell portion is provided with the axial screw groove.
Because the utility model adopts the sealing of spool and valve seat and bores sealing, more because of there being the interior cylindrical body blind hole of spool shell portion and valve seat to cooperate guiding, just make the awl sealing of spool and valve seat radial deflection can not take place, guarantee to seal reliable nothing and leak; Add that this cylindrical body outer side surface is provided with the damping that the axial screw groove forms, and guarantees pressure stability; Not only can make general straight moving relief valve and use, and the safety valve of installing that can superpose uses; Also can simplify the design of hydraulic valve block; Installation and maintenance are also very convenient.
Description of drawings
Fig. 1 is a structural representation of the present utility model.Fig. 2 is the utility model I portion enlarged view.
Embodiment
The utility model is described in further detail below in conjunction with drawings and embodiments.
This overlapping relief valve is made up of relief valve plug-in unit and stack valve body 1, and wherein the relief valve plug-in unit is made up of valve seat 2, spool 3, pressure adjusting spring 4, valve pocket 5, spring seat 6, adjustment sleeve 7, nut 8 and adjustable lever 9, and described spool 3 is a taper type.One section cylindrical body is extended on right side at described valve seat 2 filler openings, is provided with a cylindrical body blind hole 21 in this cylindrical body and is communicated with the valve seat filler opening; Extend one section cylindrical body 31 at described spool 3 frustum right-hand members, the diameter and the length of the diameter of this cylindrical body 31 and length and described valve seat 2 inner cylinder blind holes 21 are complementary.The outer side surface that described spool cylindrical body is 31 sections is provided with the axially groove of falling the trapezoid spiral 32.
In Fig. 1, logical (also can make with the B road logical) relief valve oil outlet in relief valve filler opening and A road and T road are logical.A road pressure acts on the right side of spool 3 through the spiral chute 32 of relief valve filler opening and spool 3.Be lower than the set pressure of pressure adjusting spring 4 when A road pressure, promptly do not arrive safe oil pressure relief, pressure adjusting spring 4 is pressed on spool 3 on the valve seat 2, at this moment, the shell portion 31 of spool 3 is located at 21 sections of cylinder blind holes in the valve seat 2, because the cylindrical body 31 on the spool 3 cooperates guiding with the cylinder blind hole 21 of valve seat 2, make the awl sealing of spool 3 and valve seat 2 radial deflection can not take place, guarantee to seal reliable nothing and leak.When A road pressure is increased to set pressure greater than pressure adjusting spring 4, spool 3 moves to left, spool frustum section and valve seat 2 break away from, A road binders liquid enters the T road by valve seat 2 oil outlet overflows, A road pressure no longer raises and keeps constant, at this moment, cylindrical body 31 on the spool 3 still leads in valve seat, spool 3 can not radially wobble in valve seat 2 and cause the circulation area inequality, add the damping that axially has spiral chute 32 to form at spool cylindrical body 31, make oil pressure relief stable, play the radial equilibrium effect again, spool 3 is floated in the middle of the valve seat 2, unlikely stuck.
Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technological schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (2)
1, a kind of overlapping relief valve is made up of relief valve plug-in unit and stack valve body, and wherein the relief valve plug-in unit is made up of valve seat, spool, pressure adjusting spring, valve pocket, spring seat, adjustment sleeve, nut and adjustable lever, and wherein spool is a taper type, it is characterized in that:
One section cylinder is extended on right side at described valve seat filler opening, is provided with a cylindrical body blind hole in this cylinder and is communicated with the valve seat filler opening;
Extend one section cylindrical body at described spool frustum right-hand member, the diameter and the length of cylinder blind hole are complementary in this cylindrical diameter and length and the described valve seat.
2, overlapping relief valve according to claim 1 is characterized in that, the cylindrical outer side surface of the right section of described spool is provided with the axial screw groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043694 CN2839690Y (en) | 2005-07-22 | 2005-07-22 | Superimposed relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520043694 CN2839690Y (en) | 2005-07-22 | 2005-07-22 | Superimposed relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2839690Y true CN2839690Y (en) | 2006-11-22 |
Family
ID=37427674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520043694 Expired - Lifetime CN2839690Y (en) | 2005-07-22 | 2005-07-22 | Superimposed relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2839690Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536941A (en) * | 2012-01-16 | 2012-07-04 | 浙江师范大学 | Overflow-valve device for reversing mechanism in drilling equipment |
| CN106438583A (en) * | 2016-10-11 | 2017-02-22 | 上海航天控制技术研究所 | Novel large-flow and small-inner-leakage-flow direct-acting type overflow valve |
| CN107002897A (en) * | 2014-12-16 | 2017-08-01 | 罗伯特·博世有限公司 | Pressure limiting valve |
-
2005
- 2005-07-22 CN CN 200520043694 patent/CN2839690Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536941A (en) * | 2012-01-16 | 2012-07-04 | 浙江师范大学 | Overflow-valve device for reversing mechanism in drilling equipment |
| CN107002897A (en) * | 2014-12-16 | 2017-08-01 | 罗伯特·博世有限公司 | Pressure limiting valve |
| US10890267B2 (en) | 2014-12-16 | 2021-01-12 | Robert Bosch Gmbh | Pressure-limiting valve |
| CN106438583A (en) * | 2016-10-11 | 2017-02-22 | 上海航天控制技术研究所 | Novel large-flow and small-inner-leakage-flow direct-acting type overflow 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 |
Expiration termination date: 20150722 Granted publication date: 20061122 |
|
| EXPY | Termination of patent right or utility model |