CN202790558U - Self-tight type seal ultrahigh-pressure pressure relief valve - Google Patents
Self-tight type seal ultrahigh-pressure pressure relief valve Download PDFInfo
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- CN202790558U CN202790558U CN 201220386971 CN201220386971U CN202790558U CN 202790558 U CN202790558 U CN 202790558U CN 201220386971 CN201220386971 CN 201220386971 CN 201220386971 U CN201220386971 U CN 201220386971U CN 202790558 U CN202790558 U CN 202790558U
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- pressure
- self
- wedge
- relief valve
- ultrahigh
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Abstract
The utility model discloses a self-tight type seal ultrahigh-pressure pressure relief valve comprising a current limiting hole connector (1), a pressing seat (7) and a valve seat (3). The valve seat is fixed between a valve body (6) and the pressing seat (7). A cap-type flange cylinder (12) is arranged on the pressing seat and fixedly connected with the pressing seat (7) into a whole. A T-shaped valve core (9) penetrates through the valve seat (3) and is fixedly connected with a piston (15) arranged in the flange cylinder and above the pressing seat, a pin seal assembly (8) and a spring (13) in a penetrating mode so as to combine a self-tight seal control mechanism used for controlling an ultrahigh-pressure oil pressure relief channel. When a control oil inlet B does not have control oil, the piston moves upwards under the effect of the spring, the piston drives the valve core to move upwards and be tightly attached to a conical surface of the valve seat, and meanwhile hydraulic pressure brings extrusion force to bear on the valve core so as to achieve seal and an oil discharging channel is closed. When ultrahigh-pressure oil flows into an ultrahigh-pressure pressure relief valve inlet A, ultrahigh-pressure oil pressure brings extrusion force to bear on the valve core so as to achieve self-tight seal. The higher the ultrahigh-pressure oil pressure is, the better the seal becomes.
Description
Technical field
The utility model relates to a kind of self-energized seal ultrahigh pressure pressure-relief valve that is operated on the above extra-high tension unit of 100MPa that is mainly used in.
Background technique
The ultrahigh pressure pressure-relief valve is the complete rear release high pressure of extra-high tension unit pressurized operation, makes its working medium drop to the valve member of normal pressure.Because pressure reduction is very large before and after during the release of ultrahigh pressure pressure-relief valve, the initial instant of particularly opening when pressure-relief valve, pressure reduction is in maximum, and flow velocity is very high, and impact force is very large, causes easily the spool erosion.The effect of ultrahigh pressure pressure-relief valve in system is the control release, the most frequently one of parts of the rare several activities of extra high voltage system, not only require move flexible, good airproof performance, and requiring high pressure resistantly, heat-resisting, shock-resistant, wear-resistant etc., its performance directly affects reliability, Security, working efficiency and the working life of system works.The main failure forms of ultrahigh pressure pressure-relief valve: seal ring and near burn thereof groove, pit appear, in the distortion of spool, fracture, cracked, sealing surface.High-tension apparatus because pressure reduction is excessive, is easy to out security incident and equipment failure in stress-relief process.
The pressure-relief valve that prior art is applied on the extra-high tension unit is combined by the handwheel of assembly connection in valve body, screw rod, back of the body cap, a cover and the master ball and the sealing gasket that are loaded under the screw rod usually, is by means of screw thread power forced seal part and the structure that is reached sealing by the certain contact of generation between the Sealing.Traditional release valve member, often too much the pressure-relief valve design for reliably, be difficult to avoid spool and when being subject to erosive wear, not pushing and damage with valve seat.Actual reliability, maintenance, the poor stability that uses.
During general ultrahigh pressure pressure-relief valve work, flap is subject to a thrust that makes progress under the pressure medium effect, and the higher suffered thrust that makes progress of pressure is larger in the system, and the specific pressure of sealing surface is just lower.And valve is controlled the effect of pressure in the moment of closing, and valve seat is produced very large impact force, fragile sealing surface and working life of reducing valve.Prior art adopts the mitre velve of overhang, under the impact of high-voltage high-speed fluid, produces easily vibration and fatigue fracture under dither.And in order to prolong the working life of Super high pressure valve, also to consider its work condition environment: avoid valve under little aperture, to work.If needle unlatching lift is little or breakdown action is slow, under little aperture, work, throttle clearance is little, erosion is serious, also to suitably strengthen the pitch of locking mechanism, use torque spanner to lock, strengthen opening speed and lift, increase work aperture just can make throttle clearance large, washes away to weaken and improve working life.
Summary of the invention
The purpose of this utility model provides a kind of spool not washed away by medium for deficiency of the prior art, can reduce erosive wear, good airproof performance, safe and reliable self-energized seal ultrahigh pressure pressure-relief valve.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of self-energized seal ultrahigh pressure pressure-relief valve, comprise, a metering hole joint 1, wedge 7 and be fixed on valve body 6 and wedge 7 between valve seat 3, it is characterized in that: be provided with the cap shape flange cylinder body 12 that is fixedly connected with wedge 7 in the upper-end surface of wedge 7, the spool 9 of T word shape is coaxial by valve seat 3, pass through wedge 7, column sealing assembly 8 and spring 13 and connect firmly with the piston 15 that is arranged in the flange cylinder body 12, form the self-tightening sealing control mechanism of a control ultrahigh pressure fluid discharge channel.
The axial discharge channel of described metering hole joint 1 radial communication forms ultrahigh pressure fluid discharge channel A-C with ultrahigh pressure fuel tap import A and valve outlet port C.
Described metering hole joint 1 endoporus is pre-small post-large reducing cone shape hole.
The utility model has following beneficial effect than prior art:
The utility model adopts the self-tightening control mechanism of the control ultrahigh pressure fluid discharge channel of the piston formation that is arranged in the flange cylinder body, and spool is not washed away by medium directly, has reduced erosive wear.During valve closing, spool only is subjected to the elastic force effect of spring, so that spool is very little to the impact force of valve seat, sealing surface is difficult for impaired, has improved valve working life.Because its simple in structure, reliable operation can guarantee the stability when valve is worked under ultrahigh pressure.The metering hole joint exports the front throttling sealing gasket that arranges, and can reduce the flow velocity of pressure medium between valve seat and the spool when release.Metering hole joint endoporus is pre-small post-large taper hole shape, and the latus rectum of MEDIA FLOW warp changes from small to big, and pressure medium is progressively discharged, and can weaken cavitation erosion, reduces the erosion to valve seat and spool, plays the effect that prolongs valve seat and spool life cycle.Because valve seat is close in its spool lower end, the vibration of spool is very little like this, good stability in use.Have the reliability height, the self-tightening sealing performance is good, safe characteristics.The utility model has solved valve member superhigh pressure sealing poor performance, the excessive problem of valve member volume.
Description of drawings
Fig. 1 is the sectional structure schematic representation of the utility model self-energized seal ultrahigh pressure pressure-relief valve.
Fig. 2 is the plan view of Fig. 1.
Among the figure: 1. metering hole joint, 2. throttling sealing gasket, 3. valve seat, 4. seal ring, 5. sink step hole, 6. valve body, 7. wedge, 8. column sealing assembly, 9. spool, 10. bolt, 11. positioning rings, 12. flange cylinder bodies, 13. springs, 14. spring core cylinders, 15. pistons, 16.O shape circle, 17. screws.
Embodiment
In Fig. 1, a kind of ultrahigh pressure pressure-relief valve shown in Figure 2, there is one to be shaped with nozzle shape metering hole joint 1, wedge 7 and connect firmly valve seat 3 between valve body 6 and wedge 7.When being provided with in release, the termination of described metering hole joint 1 radial communication ultrahigh pressure fluid discharge channel can reduce the throttling sealing gasket 2 of pressure medium flow velocity between valve seat 3 and the spool 9.Connect firmly metering hole joint 1 in wedge 7 radial direction by screw thread, defeat tight throttling sealing gasket 2 by means of screw thread, make the contact of its generation and reach sealing.The axial discharge channel of metering hole joint 1 radial communication forms ultrahigh pressure fluid discharge channel A-C with ultrahigh pressure pressure-relief valve import A and valve outlet port C.Metering hole joint 1 endoporus is pre-small post-large reducing cone shape hole, and the latus rectum of MEDIA FLOW warp changes from small to big, and pressure medium is progressively discharged, and reduces velocity of medium, reduces the erosion of valve seat 3 with spool 9, plays the effect that prolongs valve seat 3 and spool 9 life cycles.
The cap shape flange cylinder body 12 that is positioned on wedge 7 end faces is fixedly connected by positioning ring 11 and wedge 7.Wedge 7 connects by the bolt 10 on the flange cylinder body 12 hat steps.The hole that screw 17 passes flange cylinder body 12, positioning ring 11 and wedge 7 is fixed on the valve body 6.Be provided with between flange cylinder body 12 and the wedge 7 for the positioning ring 11 of realizing coaxial positioning.T-valve core 9 is by valve seat 3, passes through wedge 7, column sealing assembly 8 and the spring 13 that is assemblied in the spring core cylinder 14 connects firmly with the piston 15 that is arranged in the flange cylinder body 12, forms a self-tightening control mechanism of controlling ultrahigh pressure fluid discharge channel.The spool 9 that is threaded connection piston 15 is screwed into the degree of depth of piston 15, the unlatching distance of regulating valve seat 3 and spool 9, the velocity of medium between control valve seat 3 and the spool 9.
Be shaped with annular groove on piston 15 cylindricals, be equipped with the O shape circle 16 for motive sealing piston 15 in the annular groove.The movement parts spool 9 upper end bodies of rod are connected with piston 15 by screw thread, and realize the motive sealing of its cylindrical by the column sealing assembly 8 of wedge 7.
Be embedded in the valve seat 3 of wedge 7 lower end central recess, the sagging step hole 5 in valve body 6 centers is passed through to the Step Shaft of downward-extension in its lower end.Spool 9 bodies of rod that one termination is shaped with conehead are connected column sealing assembly 8, the spring 13 that the upper end sink in the center hole by valve seat 3 center holes and are connected pistons 15 with wedge, spool 9 bar lower end coneheads form conical surface seal by valve seat 3 lower end mouth taper holes.Be equipped with seal ring 4 between the contact end face between the valve seat 3 in falling into wedge 7 lower end central recess.
When control oil-in B had passed into control oil, flange cylinder body 12 inner carriers 15 promoted spool 9, open the emptying passage, and at the ultrahigh pressure fluid discharge channel A-C that ultrahigh pressure pressure-relief valve import A and outlet C form, the ultrahigh pressure pressure-relief valve begins release; When control oil-in B was oily without control, piston moved upward under the effect of spring, moved with valve seat 3 conical surfaces on the piston 15 band movable valve plugs 9 and was close to, and hydraulic coupling applies extruding force to spool 9 and realizes sealing simultaneously, thereby closes the emptying passage.When ultrahigh pressure pressure-relief valve import A passed into super high pressure oil, super high pressure oil pressure applied extruding force and realizes self-energized seal spool 9, and the super high pressure oil hydraulic coupling is higher, and it is better to seal.
Claims (10)
1. self-energized seal ultrahigh pressure pressure-relief valve, comprise, a metering hole joint (1), wedge (7) and be fixed on valve body (6) and wedge (7) between valve seat (3), it is characterized in that: be provided with the cap shape flange cylinder body (12) that is fixedly connected with wedge (7) in the upper-end surface of wedge (7), the spool of T word shape (9) is coaxial by valve seat (3), pass through wedge (7), column sealing assembly (8) and spring (13) connect firmly with the piston (15) that is arranged in the flange cylinder body (12), form the self-tightening sealing control mechanism of a control ultrahigh pressure fluid discharge channel.
2. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1, it is characterized in that: be screwed into the degree of depth of piston (15) by the be threaded spool (9) of piston (15) of adjusting, the unlatching distance of regulating valve seat (3) and spool (9), the velocity of medium between control valve seat (3) and the spool (9).
3. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1, it is characterized in that: on the termination of described metering hole joint (1) radial communication ultrahigh pressure fluid discharge channel, be provided with the throttling sealing gasket (2) that when release, can reduce pressure medium flow velocity between valve seat (3) and the spool (9).
4. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1 is characterized in that: the cap shape flange cylinder body (12) that is positioned on wedge (7) end face is fixedly connected by positioning ring (11) and wedge (7).
5. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1, it is characterized in that: wedge (7) connects by the bolt (10) on flange cylinder body (12) the hat step, is provided with between flange cylinder body (12) and the wedge (7) for the positioning ring (11) of realizing coaxial positioning.
6. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1 is characterized in that: the axial discharge channel of metering hole joint (1) radial communication forms ultrahigh pressure fluid discharge channel A-C with ultrahigh pressure fuel tap import A and valve outlet port C.
7. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1, it is characterized in that: described metering hole joint (1) endoporus is pre-small post-large reducing cone shape hole.
8. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1 is characterized in that: be shaped with annular groove on piston (15) cylindrical, be equipped with the O shape circle (16) for packed-piston (15) in the annular groove.
9. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1, it is characterized in that: a termination is shaped with spool (9) body of rod of conehead, be connected 7 by valve seat (3) center hole with wedge) interior column sealing assembly (8), spring (13) the connection piston (15) of the sagging center hole in upper end, spool (9) bar lower end conehead forms axial conical surface seal by valve seat (3) lower end mouth taper hole.
10. self-energized seal ultrahigh pressure pressure-relief valve according to claim 1 is characterized in that: be equipped with seal ring (4) between the contact end face between the valve seat (3) in falling into wedge (7) lower end central recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386971 CN202790558U (en) | 2012-07-27 | 2012-07-27 | Self-tight type seal ultrahigh-pressure pressure relief valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220386971 CN202790558U (en) | 2012-07-27 | 2012-07-27 | Self-tight type seal ultrahigh-pressure pressure relief valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202790558U true CN202790558U (en) | 2013-03-13 |
Family
ID=47817823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220386971 Expired - Lifetime CN202790558U (en) | 2012-07-27 | 2012-07-27 | Self-tight type seal ultrahigh-pressure pressure relief valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202790558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889607A (en) * | 2016-06-21 | 2016-08-24 | 佛山市南海金刚新材料有限公司 | Ultrahigh pressure release valve |
| CN108644390A (en) * | 2018-06-04 | 2018-10-12 | 华东矿用设备有限公司 | A kind of high leakproofness regulating valve |
-
2012
- 2012-07-27 CN CN 201220386971 patent/CN202790558U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889607A (en) * | 2016-06-21 | 2016-08-24 | 佛山市南海金刚新材料有限公司 | Ultrahigh pressure release valve |
| CN108644390A (en) * | 2018-06-04 | 2018-10-12 | 华东矿用设备有限公司 | A kind of high leakproofness regulating 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |