CN204042033U - Safety valve elasticity selfsealings flap - Google Patents
Safety valve elasticity selfsealings flap Download PDFInfo
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- CN204042033U CN204042033U CN201420392622.9U CN201420392622U CN204042033U CN 204042033 U CN204042033 U CN 204042033U CN 201420392622 U CN201420392622 U CN 201420392622U CN 204042033 U CN204042033 U CN 204042033U
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- flap
- valve
- seal ring
- elastic seal
- pressure tank
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Abstract
Safety valve elasticity selfsealings flap, described flap upper surface center is provided with young interior large mounting groove, up big and down small conical grooves is provided with bottom mounting groove, described flap lower surface center is provided with lower little large conical blocks, flap lower surface center is provided with lower little large conical blocks, flap lower surface offers the pressure tank of annular, flap lower surface is provided with the elastic seal ring be positioned at outside pressure tank, elastic seal ring and flap are made into integration, elastic seal ring lower surface is valve clack sealing surface, angle between the internal surface of elastic seal ring and pressure tank bottom surface is 30-60 °, flap lower surface is provided with the elastic groove of ring, flap lower surface is provided with and is positioned at outside elastic groove and higher than the step of valve clack sealing surface.The utility model is reasonable in design, and sealability is high, valve rod lifting guiding and vertical stability high, adjust highly sensitive, the unlatching of valve, take-off, return seat performance and having stable behavior performance good, be specially adapted to the bad working environments such as high pressure, high temperature.
Description
Technical field
The utility model belongs to valve technology field, particularly a kind of safety valve elasticity selfsealings flap.
Background technique
Safety valve is a kind of safety protection valve; its open-shut device is in normally off by under External Force Acting; when the pressure medium in equipment or pipeline raises, automatically open when exceeding specified value, exceed specified value by preventing pressure medium in pipeline or equipment to discharge medium outside system.Safety valve belongs to self-acting valve class, is mainly used in gas, liquid and heat distribution pipe network system, and as on steam boiler, pressurized container, pipeline, control media pressure is no more than specified value, has run important protective action to personal safety and equipment.
The existing band radiating fin spring Fall lift safety valve structure used on thermodynamic system, steam boiler, steam container, pipeline is simple, and flap is plane sealing face, middle nothing is given prominence to; Valve rod is polished rod, bottom is slightly coarser than epimere.When media operation temperature is greater than 300 DEG C, the performance of valve is very unstable, can not meet standard-required; And sealing is also easily leaked, user reflects that suggestion is larger.
Model utility content
The utility model, in order to solve deficiency of the prior art, provides that a kind of stability is strong, the safety valve elasticity selfsealings flap of good sealing effect, sensitive reliable, long service life.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: safety valve elasticity selfsealings flap, described flap upper surface center is provided with young interior large mounting groove, up big and down small conical grooves is provided with bottom mounting groove, described flap lower surface center is provided with lower little large conical blocks, flap lower surface center is provided with lower little large conical blocks, flap lower surface offers the pressure tank of annular, pressure tank is up big and down small conical structure, flap lower surface is provided with the elastic seal ring be positioned at outside pressure tank, elastic seal ring and flap are made into integration, elastic seal ring lower surface is valve clack sealing surface, angle between the internal surface of elastic seal ring and pressure tank bottom surface is 30-60 °, flap lower surface is provided with the elastic groove of ring, pressure tank bottom surface radius is more than or equal to the distance of elastic groove center to flap center, flap lower surface is provided with and is positioned at outside elastic groove and higher than the step of valve clack sealing surface.
Angle between the internal surface of described elastic seal ring and pressure tank bottom surface is 45 °.
Adopt technique scheme, safety valve also comprises valve gap, valve body, valve seat, guide cylinder, sleeve, lower radiating fin, upper radiating fin and valve rod, upper spring seat is provided with in described valve gap, lower spring cup and two ends respectively with upper spring seat, the spring that lower spring cup is inserted in, described upper spring seat, spring, lower spring cup is set on outside valve rod successively, described valve gap, radiating fin, valve body is fixedly connected sequentially, valve seat to be placed in valve body and to be positioned at valve body lower end place, guide cylinder is fixedly arranged on the joint of lower radiating fin and valve body, described guide cylinder is socketed in sleeve outer surface, lower cartridge is enclosed within flap outer surface, valve rod lower end and center, flap upper-end surface connection for transmission, flap can be connected with valve seat in contact seal, described valve rod is provided be positioned at above lower radiating fin anti-and blows cover, anti-cover lower end surface of blowing is provided with groove in ring, lower heatsink upper surface is provided with the back-up ring that can stretch into and be engaged in groove, anti-blowing inside cover lower end surface is provided with the sealing drum that can extend into lower radiating fin inner ring, described valve rod is provided with the stop collar be positioned at below lower radiating fin, in the mounting groove that valve rod is plugged in flap upper surface and valve rod lower end coordinates with conical grooves, and valve rod is provided with the baffle ring being positioned at mounting groove, and baffle ring external diameter is greater than the aperture of mounting groove opening, and described valve rod is provided with the lock tube with flap upper surface press fit.
Valve seat upper-end surface is provided with cemented carbide sealing gasket, and cemented carbide sealing gasket upper surface is sealing surface of seat, and between valve clack sealing surface and sealing surface of seat, contact seal coordinates.
Described guide cylinder outside is provided with Adjusting ring, and valve seat top is provided with lower Adjusting ring, on valve body level be provided with inner respectively with the adjusting screw of upper Adjusting ring and lower Adjusting ring top press fit.
Described anti-cover, stop collar and the lock tube of blowing all is connected with valve rod by the cotter pin worn along valve rod radial direction, prevents that blowing cover, stop collar and lock tube inner ring is threaded with stem exterior surface respectively simultaneously.
Described valve rod is the multidiameter shaft structure that increases one by one of external diameter from top to bottom, and valve rod is less than valve rod at the external diameter being provided with stop collar place being provided with the anti-external diameter blowing cover place, and valve rod is less than valve rod at the external diameter being provided with lock tube place at the external diameter being provided with stop collar place.
Flap lower surface in safety valve and form elasticity selfsealings face structure between valve seat, and on valve rod, devise lock tube, stop collar, anti-structure of blowing cover, under the effect of spring force and medium power, flap and valve seat can be sealed under High Temperature High Pressure power operating mode completely; And the unlatching of valve under hot operating mode, take-off discharge, return seat performance reach standard-required, action repeatability is reliable and stable.Overcome flap plane sealing easily to sew and open when hot with valve, take-off, return seat performance and do not reach standard-required and the bad shortcoming of action repeatability.
Pressure fluid medium enters in the pressure tank of flap lower surface, the internal surface of the flowing medium compressing elastic seal ring in pressure tank, elastic seal ring is risen downwardly towards outer bullet, due to the setting of elastic groove, elastic groove narrowed width, such valve clack sealing surface produces due to pressure medium downwardly towards outer bullet tension force, increases the impacting force to sealing surface of seat, this selfsealings power produced by valve flap structure, makes valve seal more reliable; Middle conical blocks outstanding, increase the active area of pressure medium to flap, increase medium to flap thrust upwards, change air-flow recoil direction simultaneously, improve the recoil centering of air-flow to flap, make valve opening, take-off steady rapidly, improve the adjustment sensitivity of Adjusting ring and lower Adjusting ring.Valve opening, take-off, Reseating pressure of a safety valve is made easily to be adjusted to standard-required and action repetition stability.
The setting of elastic groove, the elasticity of elastic seal ring can be improved, angle simultaneously between the internal surface (i.e. pressure tank side surface) of elastic seal ring and pressure tank bottom surface is 30-60 °, preferably 45 °, pressure direction is perpendicular to the internal surface of elastic seal ring, can ensure that high-pressure medium produces pressure to elastic seal ring like this, strengthen the sealing effect between flap and valve seat.
Adopt the stem structure of three covers (preventing blowing cover, stop collar and lock tube).In the bottom of valve rod, be designed with lock tube near flap upper end surface, be fixed on valve rod with screw thread and cotter pin, for locking the connection between flap and valve rod, increasing the weight of valve rod lower end, making valve rod lower end be tending towards plate-like; Above lock tube, be designed with stop collar between below lower radiating fin, stop collar adopts screw thread and cotter pin to be fixed on valve rod, for accurately adjusting valve Lift, increasing the weight of valve rod lower end, making valve rod lower end be tending towards plate-like; Adding valve rod is up-thin-low-thick multidiameter shaft structure, so just makes stem lower portion weight increase, decentralization.At the beginning of valve opening, take-off, supersonic airstream promotes flap, valve rod is swift reaches standard regulation Lift, because stem lower portion weight is large, center of gravity on the lower, the cylindrical of stop collar and lock tube is larger than valve rod, the valve rod risen relatively at a high speed, and stop collar and lock tube can regard as discoid pieces, just produce the gyroscopic action of gyro, play the perpendicularity controlling valve rod precession lifting.Improve the guidance quality of valve rod vertical lift and the stability of vertical lift, improve the action stability of valve.
Be connected on valve rod anti-is set between lower radiating fin and valve rod and blows cover, the anti-cover that blows adopts screw thread and cotter pin to be fixed on valve rod, groove is offered in anti-cover lower end surface of blowing, fasten with the back-up ring of lower heatsink upper surface and assemble, make flap opening, take-off discharge time high velocity heated gas current control below lower radiating fin, the spring housing in valve gap can not be blown into and affect the performance of spring; In addition, anti-design of blowing cover, makes dust can not enter between guide cylinder and sleeve, reduces the kinetic friction between guide cylinder and sleeve, is conducive to flap, the rise of valve rod and falling, improves, stabilizes sealing and the performance of valve.
In sum, the utility model is reasonable in design, and valve seal performance is high, valve rod lifting guiding and vertical stability high, adjust highly sensitive, the unlatching of valve, take-off, return seat performance and having stable behavior performance good, be specially adapted to the bad working environments such as high pressure, high temperature.
Accompanying drawing explanation
Fig. 1 is the structural representation of safety valve;
Fig. 2 is valve rod in Fig. 1, anti-blows cover, erection drawing between stop collar and lock tube;
Fig. 3 is structural representation of the present utility model in Fig. 1;
Fig. 4 is the enlarged view at A place in Fig. 3.
Embodiment
As Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, safety valve, comprises valve gap 1, valve body 2, valve seat 3, flap 4, guide cylinder 5, sleeve 6, lower radiating fin 7, upper radiating fin 31 and valve rod 8, be provided with upper spring seat 9 in described valve gap 1, lower spring cup 10 and two ends respectively with upper spring seat 9, the spring 11 that lower spring cup 10 is inserted in, described upper spring seat 9, spring 11, lower spring cup 10 is set on outside valve rod 8 successively, described valve gap 1, upper radiating fin 31, lower radiating fin 7, valve body 2 is bolted to connection successively, valve seat 3 to be placed in valve body 2 and to be positioned at valve body 2 lower end, guide cylinder 5 is fixedly arranged on the joint of lower radiating fin 7 and valve body 2, described guide cylinder 5 is socketed in sleeve 6 outer surface, sleeve 6 bottom is enclosed within flap 4 outer surface, valve rod 8 lower end and center, flap 4 upper-end surface connection for transmission, flap 4 can be connected with valve seat 3 in contact seal, described valve rod 8 is provided be positioned at above lower radiating fin 7 anti-and blows cover 12, anti-cover 12 lower end surface of blowing is provided with groove 13 in ring, lower radiating fin 7 upper surface is provided with the back-up ring 14 that can stretch into and be engaged in groove 13, prevents blowing the sealing drum 15 being provided with inside cover 12 lower end surface and can extending into lower radiating fin 7 inner ring, described valve rod 8 is provided with the stop collar 16 be positioned at below lower radiating fin 7, described flap 4 upper surface center is provided with young interior large mounting groove 17, up big and down small conical grooves 18 is provided with bottom mounting groove 17, valve rod 8 is plugged in mounting groove 17 and valve rod 8 lower end and coordinates with conical grooves 18, valve rod 8 is provided with the baffle ring 19 being positioned at mounting groove 17, baffle ring 19 external diameter is greater than the aperture of mounting groove 17 opening, and described valve rod 8 is provided with the lock tube 20 with flap 4 upper surface press fit.
Flap 4 lower surface center is provided with lower little large conical blocks 21, flap 4 lower surface offers the pressure tank 22 of annular, pressure tank 22 is up big and down small conical structure, flap 4 lower surface is provided with the elastic seal ring 23 be positioned at outside pressure tank 22, elastic seal ring 23 and flap 4 are made into integration, elastic seal ring 23 lower surface is valve clack sealing surface, the angle between the internal surface of elastic seal ring 23 and pressure tank 22 bottom surface
bfor 30-60 °, preferably 45 ° (as described in Figure 4), flap 4 lower surface is provided with the elastic groove 25 of ring, pressure tank 22 bottom surface radius is more than or equal to the distance of elastic groove 25 center to flap 4 center, valve seat 3 upper-end surface is provided with cemented carbide sealing gasket 24, elastic seal ring 23 lower surface contacts with cemented carbide sealing gasket 24 upper surface and coordinates, and cemented carbide sealing gasket 24 upper surface is sealing surface of seat, and between valve clack sealing surface and sealing surface of seat, contact seal coordinates.
Guide cylinder 5 outside is provided with Adjusting ring 26, and valve seat 3 top is provided with lower Adjusting ring 27, and on valve body 2, level is provided with the inner and pushes up the adjusting screw 28 of press fit with upper Adjusting ring 26 and lower Adjusting ring 27 respectively.
Flap 4 lower surface is provided with the step 30 be positioned at higher than valve clack sealing surface outside elastic groove 25, can guarantee that elastic seal ring 23 and cemented carbide sealing gasket 24 possess good sealing like this.
Prevent that blowing cover 12, stop collar 16 and lock tube 20 is all connected with valve rod 8 by the cotter pin 29 worn along valve rod 8 radial direction, prevent blowing cover 12 simultaneously, stop collar 16 is connected with valve rod 8 outer surface thread respectively with lock tube 20 inner ring.
Valve rod 8 is the multidiameter shaft structure that increases one by one of external diameter from top to bottom, and valve rod 8 is less than valve rod 8 at the external diameter being provided with stop collar 16 place being provided with the anti-external diameter blowing cover 12 place, and valve rod 8 is less than valve rod 8 at the external diameter being provided with lock tube 20 place at the external diameter being provided with stop collar 16 place.
Resilient seal surface structure is formed between flap 4 lower surface in the utility model and valve seat 3, and on valve rod 8, devise lock tube 20, stop collar 16, anti-structure of blowing cover 12, under the effect of spring 11, make flap 4 and valve seat 3 can seal completely under the effect of High Temperature High Pressure power; And valve reaches standard-required at hot lower unlatching, take-off discharge, time seat performance, the repeatability of performance is reliable and stable.Overcome flap 4 plane sealing easily to sew and open when hot with valve, take-off, return seat performance and do not reach standard-required and the bad shortcoming of action repeatability.
Pressure fluid medium enters in the pressure tank 22 of flap 4 lower surface, flowing medium in pressure tank 22 oppositely oppresses the internal surface of elastic seal ring 23, elastic seal ring 23 can be made outwards to open, due to the setting of elastic groove 25, elastic groove 25 narrowed width, such elastic seal ring 23 sealing surface produces downwardly towards outer bullet tension force due to pressure medium, increase the impacting force to valve seat cemented carbide sealing gasket 24 sealing surface, this selfsealings power produced by flap 4 structure, makes valve seal more reliable; Middle conical blocks 21 outstanding, increase the active area of pressure medium to flap 4, increase medium to flap 4 thrust upwards, change air-flow recoil direction simultaneously, improve the recoil centering of air-flow to flap 4, make valve opening, take-off steady rapidly, improve the adjustment sensitivity of Adjusting ring 26 and lower Adjusting ring 27.Valve opening, take-off, Reseating pressure of a safety valve is made easily to be adjusted to the stability of standard-required and action repetition.
The setting of elastic groove 25, the elasticity of elastic seal ring 23 can be improved, included angle B simultaneously between the internal surface (i.e. pressure tank 22 side surface) of elastic seal ring 23 and pressure tank 22 bottom surface is 30-60 °, preferably 45 ° (as described in Figure 4), pressure direction is perpendicular to the internal surface of elastic seal ring 23, can ensure that high-pressure medium produces pressure to elastic seal ring 23 like this, strengthen the sealing effect between flap 4 and valve seat 3.
Adopt three stem structures overlapped.In the bottom of valve rod 8, be designed with lock tube 20 near flap 4 upper end surface, be fixed on valve rod 8 with screw thread and cotter pin 29, for locking the connection between flap 4 and valve rod 8, increasing the weight of valve rod 8 lower end, making valve rod 8 lower end be tending towards plate-like; Above lock tube 20, be designed with stop collar 16 between below lower radiating fin 7, stop collar 16 adopts screw thread and cotter pin 29 to be fixed on valve rod 8, for accurate adjustment valve opening height, increases the weight of valve rod 8 lower end, makes valve rod 8 lower end be tending towards plate-like; Adding valve rod 8 is up-thin-low-thick multidiameter shaft structure, so just makes valve rod 8 bottom weight increase, decentralization.At the beginning of valve opening, take-off, supersonic airstream promotes flap 4, valve rod 8 is swift reaches standard regulation Lift, because valve rod 8 bottom weight is large, center of gravity on the lower, the cylindrical of stop collar 16 and lock tube 20 is larger than valve rod 8, the valve rod 8 risen relatively at a high speed, and stop collar 16 and lock tube 20 can regard as discoid pieces, just produce the gyroscopic action of gyro, play the perpendicularity controlling valve rod 8 precession lifting.Improve the guidance quality of valve rod 8 vertical lift and the stability of vertical lift, improve the having stable behavior performance of valve.
Be connected on valve rod 8 anti-is set between lower radiating fin 7 and valve rod 8 and blows cover 12, anti-ly blow cover 12 and adopt screw thread and cotter pin 29 to be fixed on valve rod 8, anti-ly blow cover 12 lower end surface and offer groove 13, fasten with the back-up ring 14 of lower radiating fin 7 upper surface and assemble.Make flap 4 opening, take-off discharge time high velocity heated gas current control below the lower flange of lower radiating fin 7, the spring housing in valve gap 1 can not be blown into and affect the performance of spring 11; In addition, anti-design of blowing cover 12, makes dust can not enter between guide cylinder 5 and sleeve 6, reduces the kinetic friction between guide cylinder 5 and sleeve 6, is conducive to flap 4, the rise of valve rod 8 and falling, improves, stabilizes sealing and the performance of valve.
Above-described embodiment not does any pro forma restriction to shape of the present utility model, material, structure etc.; every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all belong to the protection domain of technical solutions of the utility model.
Claims (2)
1. safety valve elasticity selfsealings flap, it is characterized in that: described flap upper surface center is provided with young interior large mounting groove, up big and down small conical grooves is provided with bottom mounting groove, described flap lower surface center is provided with lower little large conical blocks, flap lower surface center is provided with lower little large conical blocks, flap lower surface offers the pressure tank of annular, pressure tank is up big and down small conical structure, flap lower surface is provided with the elastic seal ring be positioned at outside pressure tank, elastic seal ring and flap are made into integration, elastic seal ring lower surface is valve clack sealing surface, angle between the internal surface of elastic seal ring and pressure tank bottom surface is 30-60 °, flap lower surface is provided with the elastic groove of ring, pressure tank bottom surface radius is more than or equal to the distance of elastic groove center to flap center, flap lower surface is provided with and is positioned at outside elastic groove and higher than the step of valve clack sealing surface.
2. safety valve elasticity selfsealings flap according to claim 1, is characterized in that: the angle between the internal surface of described elastic seal ring and pressure tank bottom surface is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392622.9U CN204042033U (en) | 2014-07-16 | 2014-07-16 | Safety valve elasticity selfsealings flap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420392622.9U CN204042033U (en) | 2014-07-16 | 2014-07-16 | Safety valve elasticity selfsealings flap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204042033U true CN204042033U (en) | 2014-12-24 |
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ID=52242701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420392622.9U Active CN204042033U (en) | 2014-07-16 | 2014-07-16 | Safety valve elasticity selfsealings flap |
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| Country | Link |
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| CN (1) | CN204042033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828697A (en) * | 2020-07-14 | 2020-10-27 | 哈电集团哈尔滨电站阀门有限公司 | Closed noise reduction safety valve |
-
2014
- 2014-07-16 CN CN201420392622.9U patent/CN204042033U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828697A (en) * | 2020-07-14 | 2020-10-27 | 哈电集团哈尔滨电站阀门有限公司 | Closed noise reduction safety valve |
| CN111828697B (en) * | 2020-07-14 | 2021-05-14 | 哈电集团哈尔滨电站阀门有限公司 | Closed noise reduction safety valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |