CN203176464U - Pressure valve - Google Patents
Pressure valve Download PDFInfo
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- CN203176464U CN203176464U CN 201320229465 CN201320229465U CN203176464U CN 203176464 U CN203176464 U CN 203176464U CN 201320229465 CN201320229465 CN 201320229465 CN 201320229465 U CN201320229465 U CN 201320229465U CN 203176464 U CN203176464 U CN 203176464U
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- valve
- tapering
- pressure
- valve seat
- spool
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Abstract
本实用新型公开了一种压力阀，包括阀体、置于该阀体内的阀芯、及与所述阀芯配合实现流体流量调节的阀座；所述阀芯包括定位端部及与该定位端部相对的锥部；其特征在于：该锥部为回转体，其回转母线包括回转形成该锥部的锥面的第一直线段与第二直线段、及连接所述第一直线段与第二直线段从而形成所述锥部的端面的圆弧段。该压力阀通流特性得到改善，气穴影响减弱。
The utility model discloses a pressure valve, which comprises a valve body, a valve core placed in the valve body, and a valve seat which cooperates with the valve core to realize fluid flow regulation; A cone with opposite ends; it is characterized in that: the cone is a body of revolution, and its revolving generatrix includes a first straight line segment and a second straight line segment connecting the first straight line segment and the second straight line segment forming the cone surface of the cone The second straight line segment thus forms a circular arc segment of the end face of the cone. The flow characteristic of the pressure valve is improved, and the effect of cavitation is weakened.
Description
Technical field
The utility model relates to the hydraulics field, particularly the pressure valve in the hydraulic system.
Background technique
The application of pressure valve in hydrovalve is very extensive, especially in pressure and flow control valve.Good airproof performance, conveyance capacity are strong because having for pressure valve, response rapidly, the antifouling property advantages of higher, be widely used in screw-in cartridge valve, two-way plug-in valve and other traditional non-plug-in type control valves.
By the pressure valve throttle orifice that spool and valve seat constitute, be the important structure of pressure valve, the through-flow characteristic of its valve port, spool mechanical characteristic, transient response characteristic etc. all influence control accuracy and the stability of system; Simultaneously, harm such as the temperature rise that the valve port throttling action produces, cavitation erosion also can influence the application of pressure valve.Liquid-flow state in the former pressure valve is carried out numerical simulation find, the zone that easily produces air pocket in the pressure valve mainly is the area of low pressure of flowing velocity maximum in the valve pocket, is positioned at the valve port rear side and presses close to tapering and valve seat wall.Air pocket can cause the hydraulic work system mis-behave, except producing vibration and noise, also can occupy certain space because of bubble, and the oil filling capacity of the continuity of destruction liquid, reduction fuel sucking pipe, volumetric efficiency is reduced, part of damage in the life-span of shortening hydraulic element and pipeline, causes flow and pressure surge.
It is existing that to overcome above-mentioned defective mainly be to improve from the pressure valve valve core structure, from overcoming above-mentioned formula from the power of surging as can be known, pressure reduction △ p is the key factor that influences steady-state fluid force before and after the valve port, based on reducing local resistance and cavitation erosion harm two aspect targets in the valve pocket, the pressure valve structure is improved.Pressure valve inner flow passage irregular produces high loss, big noise, poor efficiency and short-life defective in the time of can making flowing medium through cone valve.The mobile entanglement of pressure valve inside is not only that the throttling of pressure valve port causes that the structure of runner inside also causes the variation of mobile direction and velocity magnitude, so the improvement of pressure valve structure can not only limit to valve core structure.For example existing a kind of pressure valve as shown in Figure 1, it comprises valve body (not illustrating) and spool 1a, this spool comprises tapering 11a, the end face 11b of above-mentioned tapering 11a is the plane, side angulation sudden change because of the plane structure of tapering 11a itself and tapering, make the hydraulic fluid pressure gradient bigger, thereby angle sudden change place local resistance is increased.
So, be necessary it is further improved.
Summary of the invention
The purpose of this utility model has provided a kind of pressure valve, and it has specifically carried out many improvement at the spool of pressure valve, and the through-flow characteristic of this pressure valve improves, and cavitation effects weakens.
For achieving the above object, the technological scheme that the utility model provides is as follows: pressure valve comprises valve body, places spool in this valve body, and cooperates the valve seat of realizing fluid flow regulation with described spool; Described spool comprises end, location and the tapering relative with this end, location; Wherein this tapering is solid of rotation, thus first straightway that its revolution bus comprises the side that is rotarily formed described tapering with second straightway, reach and be connected the arc section that described first straightway and second straightway form the end face in described tapering.
Particularly, described valve seat comprises entrance and at least one outlet for the fluid outflow that at least one flows into for fluid, and the valve seat side that cooperates with described tapering, described valve seat side comprises the rear valve base face near the preceding valve seat surface of described entrance and close described outlet, the angle that the side in valve seat surface and described tapering forms before described is 15 ° ~ 20 °, and the angle that the side in described back conical seat surface and described tapering forms is 10 ° ~ 18 °.
Particularly, described first straight line and second included angle of straight line are 60 ° to 65 °.
According to the technical solution of the utility model, keeping under the constant situation of flow-passing surface, in the process that preceding valve seat surface and tapering angle diminish, inflow-rate of water turbine reduces, and easily the air pocket position moves forward to the spool head, in the process that rear valve base face and tapering angle diminish, inflow-rate of water turbine increases, and side reflux weakens behind the valve port.The improvement thinking of pressure valve reduced rear valve base face and tapering for increasing properties of flow, dwindles preceding valve seat surface and tapering angle for improving cavitation effects, and the end, tapering is improved to round end, reduced pressure gradient.Pressure valve local resistance after the improvement reduces, flow enhancement about 20%.Do not produce backflow after improving back cone valve mouth, valve port produces after the air pocket, is just flowed by valve port rapidly and takes away, and to the influence minimizing of sealing place valve port and valve seat, after the improvement, the through-flow characteristic of cone valve improves, and cavitation effects weakens.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is existing pressure valve valve core structure schematic representation;
Fig. 2 is the utility model embodiment pressure valve structural representation;
Fig. 3 is the spool structural scheme of mechanism of the utility model embodiment pressure valve;
Fig. 4 is the utility model embodiment pressure valve angular dependence figure.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, further the utility model is described in detail:
For overcoming the defective of pressure valve in the prior art, a kind of pressure valve is provided, can be used for hydraulic system or possess in the machinery of hydraulic system the usefulness of overflow pressure release when the feed flow pressing system surpasses rated pressure.It can effectively avoid the hidden danger brought because hydraulic fluid pressure is too high in the hydraulic system.
As shown in Figure 2, Fig. 2 shows the pressure valve in the present embodiment, and it comprises valve body 1, spool 2, valve seat 3, valve pocket 4, pressure regulating screw 5, pressure adjusting spring 6; Spool is as in the valve body, and spool cooperates with valve seat realizes the flow of hydraulic fluid adjusting, and pressure regulating screw 5 is installed in the valve pocket, and valve body 1 one ends are threaded with valve pocket 4.
Embodiment's valve body 1 is moulding or the machined piece of hollow, and its two ends are equipped with the joint that links to each other for miscellaneous part, and a kind of common Placement is for being threaded.
As Fig. 2 ~ shown in Figure 3, above-mentioned spool 2 comprises tapering 21 and joint 22 is installed, and for ease of maintenance and damage the back and change, above-mentioned installation joint 22 is realized removable linking to each other with valve seat 3 by screw thread.For fear of hydraulic oil seepage from the joint gap that joint 22 and valve seat 3 centres are installed, described spool 2 goes out a seal ring assembly department 23 to valve core axis's direction indent, in the above-mentioned seal ring assembly department 23 at least one seal ring is installed simultaneously.For reaching better sealing effect, to avoid seal ring to install and cooperate the not good problem of the not good sealing effect that causes, preferred a kind of mode can be to be provided with packing ring in the seal ring assembly department of described spool 2, above-mentioned seal ring is placed on the packing ring.
Corresponding, the valve seat 3 of the end that links to each other with valve body 1 is provided with outside thread, and valve seat 3 and valve body 1 are by being threaded.Above-mentioned valve body 1 only is a kind of non-limiting exemplifying with the Placement of valve pocket 3, and in many embodiments who does not illustrate, it also can connect by other non-threaded Placements, for example transition fit, interference fit etc.Valve body 1 the other end has one first and lays step 11, the first and lay step 11 and can be used for installing valve seat 3.The mounting end of valve seat 3 is provided with first and lays corresponding being provided with of step 11 and second lay step (not illustrating in the accompanying drawing).Described first lay step 11 and second lay step can be fixing by being threaded.
As Fig. 2 ~ shown in Figure 3, for hydraulic fluid can be flowed in pressure valve, above-mentioned valve seat 3 is provided with a feed flow hydraulic fluid, the for example entrance 32 of hydraulic oil inflow and outlet 33 for the hydraulic oil outflow, above-mentioned entrance 32 can open under the effect of spool 2 with outlet 33 or be closed, in order to control hydraulic fluid flow rate.With making to avoiding hydraulic oil from leaking out in the valve pocket 4, valve seat 3 seals by seal ring with valve pocket 4.
Have the tubbiness of inner chamber in the middle of valve pocket 4 is, this intracavity sidewall is provided with internal thread, and 4 one ends of valve pocket are provided with a through hole 41.Valve pocket 4 is locked by locking nut 7.
The double-screw bolt of pressure regulating screw 5 passes in through hole 41 by the inner chamber of valve pocket 4, and spiral shell head and valve pocket 4 offset.The internal diameter of the through hole 41 of valve pocket is less than the external diameter of spiral shell head, and Gu Luotou can not pass from through hole 41, is stopped spacing by valve pocket 4.Under the effect of pressure adjusting spring 6, above-mentioned pressure regulating screw 5 can be done reciprocal radial motion in the certain stroke in valve pocket 4.
Working procedure and principle below in conjunction with the pressure valve of the present embodiment of Fig. 2 ~ Fig. 3 describe.
As shown in Figure 2, under normal conditions, because the existence of pressure regulating screw 5 is arranged, pressure adjusting spring 6 is in compressive state all the time, and spool 2 blocks entrance 32 and outlet 33, makes the hydraulic fluid can not conducting.By regulating the locking degree of pressure regulating screw 5, when the decrement that can regulate pressure adjusting spring 6, decrement were more high, the reverse resistance of pressure adjusting spring 5 was more big, so the threshold value of hydraulic fluid promotion spool 2 is more high.
When the thrust of giving spool 2 of hydraulic fluid was not enough to overcome the reverse resistance of pressure adjusting spring 6, spool 2 still was in initial position, and pressure valve is turn-offed.When the pressure of hydraulic fluid enough high, to such an extent as to when being enough to overcome pressure adjusting spring 6 elastic resistances for the thrust of spool 2, spool 2 is subjected to displacement spring is further compressed.At this moment, the entrance 32 of valve pocket 4 is communicated with outlet 33, and hydraulic fluid can flow to from entrance 32, and outlet 33 is flowed out.When hydraulic fluid pressure during less than pressure adjusting spring 6 elastic resistances, pressure adjusting spring 6 resets and makes spool reply initial position, and then turn-offs pressure valve.
By foregoing description, this pressure valve can avoid that hydraulic fluid pressure continues to increase in the hydraulic system, can effectively protect component in the hydraulic system by the overflow pressure release.
Describe concrete improvements of the present utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 2, in the present embodiment, above-mentioned tapering 21 is solid of rotation, thus first straightway 211 that its revolution bus comprises the side that is rotarily formed described tapering with second straightway 212, reach and be connected the arc section 213 that described first straightway 211 and second straightway 212 form the end face in described tapering 21.
Because the existence of arc section 213, then form the end of a globular model during bus rotation, avoid that the side is lofty to go out surface of discontinuity, reduce pressure gradient.Lower local hydraulic fluid resistance.The concrete shape of above-mentioned arc section 213 does not limit, and only needs to form rounding off with first straight line 211 and second straightway 212 and gets final product.
As shown in Figure 4, described valve seat 3 comprises entrance 32 and at least one outlet 33 for the fluid outflow that at least one flows into for fluid, and the valve seat side 34 that cooperates with described tapering 21, described valve seat side 34 comprises near the preceding valve seat surface 341 of described entrance and the rear valve base face 342 of close described outlet, valve seat surface 341 is 15 ° ~ 20 ° with the optimum angle of the side formation in described tapering 21 before described, and the optimum angle that the side in described back conical seat surface 342 and described tapering 21 forms is 10 ° ~ 18 °.Many experiment showed, in the above-mentioned angular range, pressure minimum when hydraulic fluid is flowed through spool 2.A kind of preferably mode of having a try is, described before valve seat surface 314 be 18 ° with the angle that 21 sides, described tapering form, the angle of the side formation in rear valve base face and tapering is 15 °.
Preferred embodiment, described first straight line 211 and second straight line, 222 optimum angles are 60 ° to 65 °.Many first straight line 211 and second straight line, 222 angles of experiment showed, are best in this scope, the pressure minimum when this moment, hydraulic fluid was flowed through spool 2.
As Fig. 2 ~ shown in Figure 4, according to the technical solution of the utility model, keeping under the constant situation of flow-passing surface, in the process that preceding valve seat surface 341 and tapering 21 angles diminish, inflow-rate of water turbine reduces, and easily the air pocket position moves forward to spool 2 heads, in the process that rear valve base face 342 and tapering angle diminish, inflow-rate of water turbine increases, and side reflux weakens behind the valve port.The improvement thinking of pressure valve reduced rear valve base face and tapering for increasing properties of flow, dwindles preceding valve seat surface and tapering angle for improving cavitation effects, and the end, tapering is improved to round end, reduced pressure gradient.Pressure valve local resistance after the improvement reduces, flow enhancement about 20%.Do not produce backflow after improving back cone valve mouth, valve port produces after the air pocket, is just flowed by valve port rapidly and takes away, and to the influence minimizing of sealing place valve port and valve seat, after the improvement, the through-flow characteristic of cone valve improves, and cavitation effects weakens.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. pressure valve comprises valve body, places spool in this valve body, and cooperates the valve seat of realizing fluid flow regulation with described spool; Described spool comprises end, location and the tapering relative with this end, location; It is characterized in that: this tapering is solid of rotation, thus first straightway that its revolution bus comprises the conical surface that is rotarily formed this tapering with second straightway, reach and be connected the arc section that described first straightway and second straightway form the end face in described tapering.
2. pressure valve according to claim 1, it is characterized in that: described valve seat comprises the entrance of at least one feed flow hydraulic fluid inflow and the outlet that at least one feed flow hydraulic fluid flows out, and the valve seat side that cooperates with described tapering, described valve seat side comprises the rear valve base face near the preceding valve seat surface of described entrance and close described outlet, the angle that the side in valve seat surface and described tapering forms before described is 15 ° ~ 20 °, and the angle that the side in described back conical seat surface and described tapering forms is 10 ° ~ 18 °.
3. pressure valve according to claim 2, it is characterized in that: described first straight line and second included angle of straight line are 60 ° to 65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229465 CN203176464U (en) | 2013-05-01 | 2013-05-01 | Pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229465 CN203176464U (en) | 2013-05-01 | 2013-05-01 | Pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176464U true CN203176464U (en) | 2013-09-04 |
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ID=49073161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320229465 Expired - Fee Related CN203176464U (en) | 2013-05-01 | 2013-05-01 | Pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176464U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468640A (en) * | 2018-04-04 | 2018-08-31 | 太原理工大学 | A kind of emulsion pump high speed flat valve |
| CN111677924A (en) * | 2020-06-30 | 2020-09-18 | 上海捷氢科技有限公司 | Plug-in type pressure relief safety valve |
| CN113323934A (en) * | 2021-05-26 | 2021-08-31 | 江苏八方动力机械有限公司 | Novel check valve component |
-
2013
- 2013-05-01 CN CN 201320229465 patent/CN203176464U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108468640A (en) * | 2018-04-04 | 2018-08-31 | 太原理工大学 | A kind of emulsion pump high speed flat valve |
| CN108468640B (en) * | 2018-04-04 | 2024-02-20 | 太原理工大学 | High-speed distributing valve of emulsion pump |
| CN111677924A (en) * | 2020-06-30 | 2020-09-18 | 上海捷氢科技有限公司 | Plug-in type pressure relief safety valve |
| CN113323934A (en) * | 2021-05-26 | 2021-08-31 | 江苏八方动力机械有限公司 | Novel check valve component |
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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: 20130904 Termination date: 20150501 |
|
| EXPY | Termination of patent right or utility model |