CN110848431A - Double-sealing spring type safety valve - Google Patents
Double-sealing spring type safety valve Download PDFInfo
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- CN110848431A CN110848431A CN201911278478.XA CN201911278478A CN110848431A CN 110848431 A CN110848431 A CN 110848431A CN 201911278478 A CN201911278478 A CN 201911278478A CN 110848431 A CN110848431 A CN 110848431A
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- seat
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- 238000007789 sealing Methods 0.000 title claims abstract description 75
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000009825 accumulation Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 238000003860 storage Methods 0.000 abstract description 14
- 238000001125 extrusion Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000010030 laminating Methods 0.000 description 26
- 230000006978 adaptation Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a double-sealing spring type safety valve, aiming at solving the defect of poor sealing effect of the safety valve. The invention comprises a valve body, a valve seat and a valve sleeve, wherein a connecting seat is tightly arranged between the valve body and the valve sleeve, a valve rod and a setting spring are arranged in the valve sleeve, the lower end of the valve rod is connected with a valve clack, a corrugated pipe is connected between the valve clack and the connecting seat, a sealing convex ring is arranged at the upper end of the valve seat, a pressing pad is connected at the lower end of the valve clack, an O-shaped ring is arranged between the outer wall of the pressing pad and the side wall of a mounting groove, an extrusion gap is arranged between the lower end edge of the pressing pad and the opening edge of the mounting groove, the O-shaped ring extends out of the extrusion gap, a pressure storage cavity is formed between the outer wall of the pressing pad, the side wall of the mounting groove and the side wall of the mounting groove, and the O-shaped.
Description
Technical Field
The invention relates to a safety valve, in particular to a double-sealing spring type safety valve.
Background
In industrial production, a safety valve is the most commonly used overpressure protection device capable of continuously working, and under certain working conditions, special materials (such as titanium) are often required to be used, but the sealing of the safety valve is difficult due to the fact that the materials are limited in characteristics and cannot be subjected to surfacing welding. The sealing mode of the safety valve commonly used at present mostly adopts single metal to metal sealing or metal to elastic material sealing, and the sealing effect is not good many times.
Disclosure of Invention
The invention overcomes the defect of poor sealing effect of the safety valve, and provides a double-sealing spring type safety valve which has double sealing characteristics and good sealing effect.
In order to solve the technical problems, the invention adopts the following technical scheme: a double-seal spring type safety valve comprises a valve body, a valve seat and a valve sleeve, wherein a connecting seat is tightly installed between the valve body and the valve sleeve, the valve seat is tightly installed in the valve body, a valve rod and a setting spring are installed in the valve sleeve, the setting spring is abutted between the valve rod and the valve sleeve, the valve rod penetrates through the connecting seat, the lower end of the valve rod is connected with a valve clack, a corrugated pipe is connected between the valve clack and the connecting seat, a sealing convex ring is arranged at the upper end of the valve seat, a mounting groove is formed in the lower surface of the valve clack, a pressing pad is connected in the mounting groove, an O-shaped ring is installed between the outer wall of the pressing pad and the side wall of the mounting groove, an extrusion gap is formed between the lower end edge of the pressing pad and the opening edge of the mounting groove, the O, the through flow groove is communicated between the pressure accumulation cavity and the through flow hole, one part of the upper end surface of the sealing bulge is abutted against the O-shaped ring, and the other part of the upper end surface of the sealing bulge is abutted against the lower surface of the pressing pad.
The safety valve is pressed down by the valve clack under the action of the setting spring, so that one part of the upper end surface of the sealing bulge at the upper end of the valve seat is abutted against the O-shaped ring, and the other part of the upper end surface of the sealing bulge at the upper end of the valve seat is abutted against the lower surface of the pressing pad. The pressing pad and the sealing bulge are abutted to form a metal-to-metal sealing mode, the sealing bulge and the O-shaped ring are abutted to form a metal-to-elastic material sealing mode, and the two sealing modes act together to greatly improve the sealing effect. After the medium gets into the disk seat, get into pressure accumulation cavity through discharge orifice, through-flow groove, the pressure effect of high-pressure medium circles at the O type, makes O type circle extrude to the extrusion gap, makes O type circle more inseparable butt to sealed protruding, improves sealed effect. The double-sealing spring type safety valve has double sealing characteristics and good sealing effect.
As preferred, O type circle cross-section profile edge divide into the deformation zone, valve clack laminating district, the pressure district, compress tightly pad laminating district, valve clack laminating district sets up with compressing tightly the pad laminating district relatively, be equipped with the recess on the mounting groove lateral wall, the recess includes the changeover portion, valve clack laminating section, the deformation section, the guide section, changeover portion and the equal slope setting of guide section, valve clack laminating section and deformation section all are the arc, it compresses tightly pad laminating section to be equipped with curved on the outer wall of lower extreme to compress tightly, the pressure district corresponds with the pressure storage cavity and arranges in between changeover portion and the compression pad outer wall, valve clack laminating district and valve clack laminating section adaptation and closely laminate, the deformation district corresponds with the deformation section and is equipped with the deformation clearance between district and the deformation section, compress tightly pad laminating district and compress tightly pad.
The valve clack laminating area of O type circle just closely laminates with the valve clack laminating section adaptation of recess, compresses tightly to fill up the laminating area and compress tightly to fill up laminating section adaptation and closely laminate to realize the steady reliable installation of O type circle. A deformation gap is formed between the deformation zone and the deformation section, so that a deformation space is provided for the O-shaped ring. The guide section plays a role in guiding the O-shaped ring, and the O-shaped ring is conveniently extruded out towards the direction of the extrusion gap in the deformation process.
As preferred, the changeover portion is from last to down the setting of inclining outwards, and the direction section is from last to down the setting of inclining inwards, and the contained angle of changeover portion and horizontal plane is 10 degrees, and the contained angle of direction section and horizontal plane is 20 degrees. The obliquely arranged transition section facilitates the flow of the medium. The inclination angle of the guide section is reasonable, the poor guide effect can not be caused by the over-small angle, and the clamping effect on the O-shaped ring can not be influenced by the over-large angle.
Preferably, the outer edge of the lower surface of the pressing pad is provided with a sealing boss, the lower surface of the sealing boss is lower than the lower surface of the valve clack, and the upper end face of the sealing boss abuts against the lower surface of the sealing boss. The sealing boss protrudes out of the lower surface of the pressing pad, and the sealing effect is better after the sealing boss is abutted to the sealing boss.
Preferably, the circulation groove is circular, a plurality of transverse grooves are uniformly distributed at the edge position of the upper surface of the compression pad, a plurality of vertical grooves are correspondingly arranged on the outer wall of the compression pad and the transverse grooves one by one, the transverse grooves are communicated between the circulation groove and the vertical grooves, and the vertical grooves are communicated with the pressure storage cavity. The structure arrangement makes the medium flow into the pressure accumulation cavity through the through hole more convenient and reliable.
Preferably, the lower end of the valve rod is connected with a valve clack seat, and the valve clack is installed at the lower end of the valve clack seat. The valve clack seat is arranged to facilitate installation of the valve clack.
Preferably, the connecting seat is provided with a positioning sleeve extending downwards, the valve flap seat is of an inverted T-shaped structure, and the small-diameter part of the valve flap seat is movably sleeved in the positioning sleeve. The positioning sleeve has good positioning effect on the valve rod, so that the lifting process of the valve rod is more stable and reliable, and the phenomenon of deviation cannot occur.
Preferably, the valve clack seat is provided with a positioning groove on the lower end face, the valve clack is installed in the positioning groove in an adaptive mode, the outer edge of the lower end of the valve clack seat is provided with a pressure storage ring extending downwards, the inner wall of the pressure storage ring is arranged in a downward inclining mode from top to bottom, the upper end of the valve seat is connected with an adjusting ring in a threaded mode, a chamfer is arranged on the inner wall of the upper end of the adjusting ring, a lower pressure storage ring groove is formed between the chamfer and the outer wall of the upper end. The upper pressure storage ring groove and the lower pressure storage ring groove can accumulate pressure, so that the valve clack can be conveniently opened, and the adjusting ring can rotate to adjust the upper position and the lower position, so that the size of the lower pressure storage ring groove is adjusted, and the fine adjustment of the opening pressure of the valve clack is realized.
Preferably, the upper end of the valve sleeve is provided with a connecting sleeve, the outer wall of the connecting sleeve is connected with a valve cap, the inner wall of the connecting sleeve is in threaded connection with a sleeve, the valve rod is movably sleeved with the sleeve, the upper end of the valve rod extends out of the sleeve, the outer wall of the upper end of the valve rod is provided with online detection threads, the valve rod is sleeved with an upper spring seat and a lower spring seat, the setting spring is installed between the upper spring seat and the lower spring seat, the upper spring seat abuts against the. The sleeve plays a good positioning role in the valve rod. The upper end of the valve rod is provided with an online detection thread, so that online verification is facilitated.
Preferably, an inflation cavity which is communicated up and down is arranged in the valve clack, a piston is arranged at the lower end position in the inflation cavity, the lower end face of the piston is arranged towards the through flow hole, the O-shaped ring is of a hollow structure, a circle of annular cavity is arranged in the O-shaped ring, an inflation hole is arranged in the valve clack, one end of the inflation hole is communicated to the position close to the upper end in the inflation cavity, the other end of the inflation hole extends to the side wall of the mounting groove, an inflation nozzle which is communicated with the annular cavity is arranged on the outer wall of the O-shaped ring, the inflation nozzle is hermetically arranged.
After the medium enters the valve seat, the medium pressure acts on the lower end face of the piston, so that air in the inflation cavity is inflated into the annular cavity in the O-shaped ring through the inflation hole and the inflation nozzle, the O-shaped ring expands outwards, and the sealing performance between the O-shaped ring and the sealing bulge is improved.
Compared with the prior art, the invention has the beneficial effects that: the double-sealing spring type safety valve has double sealing characteristics and good sealing effect.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a valve flap and a pressure pad of example 1 of the present invention;
FIG. 3 is a top view of the tamp pad of the present invention;
fig. 4 is a partially enlarged schematic view of the O-ring connection position of embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of a valve flap and a pressure pad of example 2 of the present invention;
in the figure: 1. the valve comprises a valve body, a valve seat, a valve body, a valve sleeve, a valve seat, a connecting seat, a valve rod, a setting spring, a valve clack, a connecting sleeve, a valve bonnet, a sleeve, an online detection thread, a valve rod, a setting spring, a valve clack, a sealing convex ring, a connecting sleeve, a valve bonnet, a sleeve, a valve clack, a pressure storage cavity, a pressure channel, a pressure storage cavity, a pressure channel, a pressure storage cavity, a pressure channel, a pressure, 42. the device comprises a pad disc, 43, a locking sleeve, 44, a locking groove, 45, an inflation cavity, 46, a piston, 47, a ring cavity, 48, an inflation hole, 49, an inflation nozzle, 50 and a sealing plug.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example 1: a double-seal spring type safety valve (see attached figures 1 to 4) comprises a valve body 1, a valve seat 2 and a valve sleeve 3, wherein a connecting seat 4 is tightly installed between the valve body and the valve sleeve, the valve seat is tightly installed in the valve body, a valve rod 5 and a setting spring 6 are installed in the valve sleeve, the setting spring is abutted between the valve rod and the valve sleeve, the valve rod penetrates through the connecting seat, and the lower end of the valve rod is connected with a valve clack 7. The upper end of the valve sleeve is provided with a connecting sleeve 8, the outer wall of the connecting sleeve is connected with a valve cap 9, the inner wall of the connecting sleeve is in threaded connection with a sleeve 10, the valve rod is movably sleeved with the sleeve, the upper end of the valve rod extends out of the sleeve, the outer wall of the upper end of the valve rod is provided with an online detection thread 11, and the upper ends of the sleeve and the valve rod. An upper spring seat 12 and a lower spring seat 13 are sleeved on the valve rod, the setting spring is installed between the upper spring seat and the lower spring seat, the upper spring seat is abutted to the lower end of the sleeve, and the lower spring seat is abutted to the outer wall of the valve rod. A circle of convex ring is arranged on the valve rod, and the lower spring seat is abutted against the convex ring.
Connecting bellows 14 between valve clack and the connecting seat, the disk seat upper end is equipped with sealed bulge loop 15, be equipped with the mounting groove on the valve clack lower surface, connect in the mounting groove and compress tightly pad 16, it installs O type circle 17 to compress tightly between filling up outer wall and the mounting groove lateral wall, it extrudes clearance 18 to compress tightly to be equipped with between filling up lower extreme edge and the mounting groove opening edge, O type circle stretches out and extrudes the clearance, it is close to upper portion position to compress tightly the pad outer wall, the mounting groove lateral wall is close to the bottom position, form pressure accumulation cavity 19 between the O type circle three, it is equipped with through-flow groove 20 on the upper surface to compress tightly to stack up, it is. The circulation groove is circular, compresses tightly to stack up surface border position equipartition and is equipped with a plurality of cross slot 22, compresses tightly to be equipped with a plurality of on the pad outer wall and erect groove 23 with the cross slot one-to-one, and the cross slot intercommunication is in the circulation groove and is erected between the groove, erects groove and pressure storage cavity intercommunication. One part of the upper end surface of the sealing bulge abuts against the O-shaped ring, and the other part of the upper end surface of the sealing bulge abuts against the lower surface of the pressing pad. The outer edge of the lower surface of the pressing pad is provided with a sealing boss 24, the lower surface of the sealing boss is lower than the lower surface of the valve clack, and the upper end face of the sealing boss is abutted to the lower surface of the sealing boss.
O type circle cross-section profile edge divide into deformation zone 25, valve clack laminating district 26, receive the district 27, compress tightly pad laminating district 28, four district equipartitions set up, valve clack laminating district sets up with compressing tightly the pad laminating district relatively, be equipped with the recess on the mounting groove lateral wall, the recess includes changeover portion 29, valve clack laminating section 30, deformation section 31, guide section 32, changeover portion and guide section all slope the setting, valve clack laminating section and deformation section all are the arc, it fills up laminating section 33 to be equipped with curved compressing tightly on the outer wall of lower extreme to compress tightly, it corresponds and arranges in the changeover portion and compresses tightly between the pad outer wall with the pressure storage cavity to receive the district, valve clack laminating district and valve clack laminating section adaptation and closely laminating, deformation district and deformation section correspond and be equipped with deformation clearance 34 between district and the deformation section with compressing tightly pad laminating section adaptation and closely laminating. The changeover portion is from the setting that down leans out, and the direction section is from the setting that down leans in, and the changeover portion is 10 degrees with the contained angle of horizontal plane, and the contained angle of direction section and horizontal plane is 20 degrees. A gap is arranged between the guide section and the deformation area on the outer wall of the O-shaped ring.
The valve rod lower extreme is connected valve clack seat 35, and the valve clack is installed at valve clack seat lower extreme. The connecting seat is provided with a positioning sleeve 36 extending downwards, the valve clack seat is in an inverted T-shaped structure, and the small-diameter part of the valve clack seat is movably sleeved in the positioning sleeve. The valve seat is provided with a positioning groove 37 on the lower end face, the valve clack is installed in the positioning groove in a matched mode, a pressure accumulating ring 38 extending downwards is arranged on the outer edge of the lower end of the valve clack seat, the inner wall of the pressure accumulating ring is arranged to incline outwards from top to bottom, the upper end of the valve seat is connected with an adjusting ring 39 in a threaded mode, a chamfer angle is arranged on the inner wall of the upper end of the adjusting ring, a lower pressure accumulating ring groove 40 is formed between the chamfer angle and the outer wall of the upper end of the valve seat. The upper end of the corrugated pipe is connected with an annular pad 42, the lower end of the corrugated pipe is connected with a locking sleeve 43, the pad is tightly installed between the installation seat and the valve body, and the locking sleeve is tightly sleeved on the valve flap seat. A plurality of locking grooves 44 are uniformly distributed on the outer wall of the adjusting ring, the outer wall of the valve body is tightly connected with set screws, and the front ends of the set screws are abutted to the locking grooves.
The safety valve is pressed down by the valve clack under the action of the setting spring, so that one part of the upper end surface of the sealing bulge at the upper end of the valve seat is abutted against the O-shaped ring, and the other part of the upper end surface of the sealing bulge at the upper end of the valve seat is abutted against the lower surface of the pressing pad. The pressing pad and the sealing bulge are abutted to form a metal-to-metal sealing mode, the sealing bulge and the O-shaped ring are abutted to form a metal-to-elastic material sealing mode, and the two sealing modes act together to greatly improve the sealing effect. After the medium gets into the disk seat, get into pressure accumulation cavity through discharge orifice, through-flow groove, the pressure effect of high-pressure medium circles at the O type, makes O type circle extrude to the extrusion gap, makes O type circle more inseparable butt to sealed protruding, improves sealed effect. The double-sealing spring type safety valve has double sealing characteristics and good sealing effect.
Example 2: a double-seal spring type safety valve (see attached figure 5) is similar to embodiment 1 in structure, and mainly different in that an inflation cavity 45 which is communicated up and down is arranged in a valve flap in the embodiment, a piston 46 is installed at the lower end position in the inflation cavity in a matched mode, the piston is of a T-shaped structure, the lower end face of the piston is arranged towards a through hole, an O-shaped ring is of a hollow structure, a ring annular cavity 47 is arranged in the O-shaped ring, an inflation hole 48 is arranged in the valve flap, one end of the inflation hole is communicated with the position, close to the upper end, in the inflation cavity, the other end of the inflation hole extends to the side wall of a mounting groove, an inflation nozzle 49 which is installed on the outer wall of the O-shaped ring and communicated with the annular cavity is installed. A one-way inflation valve can be arranged in the inflation nozzle to prevent air in the annular cavity from flowing outwards. The other structure is the same as embodiment 1. After the medium enters the valve seat, the medium pressure acts on the lower end face of the piston, so that air in the inflation cavity is inflated into the annular cavity in the O-shaped ring through the inflation hole and the inflation nozzle, the O-shaped ring expands outwards, and the sealing performance between the O-shaped ring and the sealing bulge is improved.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A double-seal spring type safety valve comprises a valve body, a valve seat and a valve sleeve, wherein a connecting seat is tightly installed between the valve body and the valve sleeve, the valve seat is tightly installed in the valve body, a valve rod and a setting spring are installed in the valve sleeve, the setting spring is abutted between the valve rod and the valve sleeve, the valve rod penetrates through the connecting seat, and the lower end of the valve rod is connected with a valve clack. The through flow groove is communicated between the pressure accumulation cavity and the through flow hole, one part of the upper end surface of the sealing bulge is abutted against the O-shaped ring, and the other part of the upper end surface of the sealing bulge is abutted against the lower surface of the pressing pad.
2. The double seal spring type safety valve according to claim 1, wherein the cross-sectional profile edge of the O-ring is divided into a deformation region, a valve flap attachment region, a pressure region, and a pressure pad attachment region, the valve flap attachment region and the pressure pad attachment region are oppositely disposed, a groove is disposed on the side wall of the mounting groove, the groove includes a transition section, a valve flap attachment section, a deformation section, and a guide section, the transition section and the guide section are both obliquely disposed, the valve flap attachment section and the deformation section are both arc-shaped, an arc-shaped pressure pad attachment section is disposed on the outer wall of the lower end of the pressure pad, the pressure region corresponds to the pressure accumulation cavity and is disposed between the transition section and the outer wall of the pressure pad, the valve flap attachment region and the valve flap attachment section are adapted and tightly attached, the deformation region and the deformation section correspond to each other, and a deformation gap is.
3. The double spring-loaded safety valve of claim 2, wherein the transition section is inclined outwardly from top to bottom, the pilot section is inclined inwardly from top to bottom, the transition section forms an angle of 10 degrees with the horizontal plane, and the pilot section forms an angle of 20 degrees with the horizontal plane.
4. The double-sealing spring type safety valve of claim 1, wherein the outer edge of the lower surface of the pressure pad is provided with a sealing boss, the lower surface of the sealing boss is lower than the lower surface of the valve flap, and the upper end surface of the sealing boss abuts against the lower surface of the sealing boss.
5. The double-sealing spring safety valve of claim 1, wherein the flow channel is circular, the pressure pad has a plurality of transverse grooves uniformly disposed at the edge of the upper surface thereof, the outer wall of the pressure pad has a plurality of vertical grooves corresponding to the transverse grooves, the transverse grooves communicate between the flow channel and the vertical grooves, and the vertical grooves communicate with the pressure accumulation cavity.
6. A dual seal spring safety valve according to any one of claims 1 to 5 wherein the lower end of the stem is connected to a valve flap seat and the valve flap is mounted to the lower end of the valve flap seat.
7. The double-sealing spring type safety valve as claimed in claim 6, wherein the connecting seat is provided with a downwardly extending locating sleeve, the valve flap seat is in an inverted T-shaped configuration, and the small diameter portion of the valve flap seat is movably fitted in the locating sleeve.
8. The double sealing spring type safety valve according to claim 6, wherein the valve flap seat has a positioning groove on its lower end surface, the valve flap is fitted in the positioning groove, the outer edge of the lower end of the valve flap seat is provided with a pressure accumulating ring extending downward, the inner wall of the pressure accumulating ring is inclined outward from top to bottom, the upper end of the valve seat is connected with the adjusting ring by a thread, the inner wall of the adjusting ring is provided with a chamfer, a lower pressure accumulating ring groove is formed between the chamfer and the outer wall of the upper end of the valve seat, and an upper pressure accumulating ring groove is formed between the inner.
9. A double sealing spring safety valve according to any one of claims 1 to 5, wherein the upper end of the valve housing is provided with a connecting sleeve, the outer wall of the connecting sleeve is connected with the valve cap, the inner wall of the connecting sleeve is in threaded connection with the sleeve, the valve stem is movably sleeved with the sleeve, the upper end of the valve stem extends out of the sleeve, the outer wall of the upper end of the valve stem is provided with an on-line detection thread, the upper end of the valve stem is sleeved with an upper spring seat and a lower spring seat, the setting spring is installed between the upper spring seat and the lower spring seat.
10. The double sealing spring type safety valve according to any one of claims 1 to 5, wherein an inflation cavity is formed in the valve flap and penetrates up and down, a piston is mounted at the lower end of the inflation cavity, the lower end face of the piston faces the through-flow hole, the O-ring is of a hollow structure, a circle of annular cavity is formed in the O-ring, an inflation hole is formed in the valve flap, one end of the inflation hole is communicated with the position close to the upper end of the inflation cavity, the other end of the inflation hole extends to the side wall of the mounting groove, an inflation nozzle is mounted on the outer wall of the O-ring and communicated with the annular cavity, the inflation nozzle is mounted at the opening end of the inflation hole in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278478.XA CN110848431B (en) | 2019-12-13 | 2019-12-13 | Double-sealing spring type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278478.XA CN110848431B (en) | 2019-12-13 | 2019-12-13 | Double-sealing spring type safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110848431A true CN110848431A (en) | 2020-02-28 |
| CN110848431B CN110848431B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911278478.XA Active CN110848431B (en) | 2019-12-13 | 2019-12-13 | Double-sealing spring type safety valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734859A (en) * | 2020-08-10 | 2020-10-02 | 罗浮阀门集团有限公司 | Liquid phase medium full-open type safety valve |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111734859A (en) * | 2020-08-10 | 2020-10-02 | 罗浮阀门集团有限公司 | Liquid phase medium full-open type safety valve |
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| CN110848431B (en) | 2023-06-30 |
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