CN202001685U - Pressure-bearing rod bell jar valve clack sealing type safety valve - Google Patents
Pressure-bearing rod bell jar valve clack sealing type safety valve Download PDFInfo
- Publication number
- CN202001685U CN202001685U CN2010206866880U CN201020686688U CN202001685U CN 202001685 U CN202001685 U CN 202001685U CN 2010206866880 U CN2010206866880 U CN 2010206866880U CN 201020686688 U CN201020686688 U CN 201020686688U CN 202001685 U CN202001685 U CN 202001685U
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- pressure
- valve
- safety valve
- bell jar
- sealing
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Abstract
The utility model provides a pressure-bearing rod bell jar valve clack sealing type safety valve, adopting the pressure-bearing rod bell jar valve clack sealing type which replaces the existing plane valve clack (valve core) sealing type of a safety valve, and simultaneously, the structure of a sealing seat of the safety valve used commonly at present is improved, namely, a pressure relief opening of the sealing seat is designed on the side wall of the sealing seat, the direction of an air discharging opening of the sealing seat is vertical to the opening direction of a bell jar valve clack, and a working medium of the safety valve opens the axial pressure of the bell jar calve clack, which is applied on the bell jar valve clack through a pressure bearing rod. In the pressure-bearing rod bell jar valve clack sealing type safety valve, the cross section of the pressure-bearing rod, used for bearing pressure axially, is unrelated to the cross section of a safety valve runner, and a loading mechanism for playing the role of pre-tightening and sealing can be designed and manufactured more lightly when being applied on the safety valve with high pressure and large caliber; for the pressure-bearing rod bell jar valve clack sealing type safety valve, the axial pressure-bearing area of the pressure-bearing rod is constant, and the pressure difference when the safety valve is closed or opened is zero and is note affected by back pressure, so that the safety valve can be started and discharged and returns to seat stably, and can not generate the phenomena of chatter and flutter; and the pressure-bearing rod bell jar valve clack sealing type safety valve technology can be applied on various types of safety valves of springs, heavy hammers and the like.
Description
Technical field
The utility model relates to the overvoltage safety protection device of pressure-bearing class special equipments such as boiler, pressurized container, especially a kind of pressure-bearing bar belljar valve flap seal formula safety valve that is applied on the pressure-bearing class special equipments such as boiler, pressurized container.
Background technique
Safety valve is a main safety attachment on the pressure-bearing class special equipments such as boiler, pressurized container; generally be installed on protective system safety on the equipment of locking system; when the pressure in the protected equipment surpasses design pressure; safety valve can be opened automatically, and the medium of excess pressure in the equipment is discharged, and the equipment internal pressure is reduced; thereby avoid equipment to be destroyed by superpressure; when the equipment internal pressure dropped to the pressure of setting, safety valve can cut out thereupon automatically, thereby the equipment that guarantees is able to continuous proper functioning.
The sealing means of the safety valve of extensive use at present adopts plane flap (spool) seal style mostly, adopt the major defect of plane flap (spool) sealed safety valve to be: 1, because plane flap (spool) diameter is bigger than Flow diameter (larynx footpath), and opening direction is identical with the media outlet direction, therefore flap is big in the variation in pressure that the unlatching front and back afford, thereby produced certain Blowdown of a safety valve, be generally 4%～10% of cracking pressure, if Blowdown of a safety valve is too little, flap will produce chatter and flutter phenomenon, thereby shorten the working life of safety valve, if Blowdown of a safety valve is too big, Reseating pressure of a safety valve will be low excessively, causes unnecessary waste and pollution even cause serious accident, influence ordinary production; 2, because the pretension sealing load that plane flap (spool) needs need be greater than pressure medium and the long-pending product of cross section of fluid channel, therefore under the situation of high pressure, big discharge capacity, make the pressure regulator of safety valve just must design very hugely or be forced to adopt Pilot operated safety valve, cost, installation and the working service cost of safety valve are increased.(number of patent application is the pressure-bearing rod seal formula safety valve of my design invention: 201010170052.5,201020187723.4), though can solve shortcoming 1 problem, shortcoming 2 problems are failed to solve.
Summary of the invention
The purpose of this utility model is can not solve the problems of the technologies described above at existing background technique, has proposed a kind of pressure-bearing bar belljar valve flap seal formula safety valve.
The utility model is achieved in that
Above-described pressure-bearing bar belljar valve flap seal formula safety valve; by valve body; sealing mechanism; valve gap and load maintainer are formed; the sealing mechanism design is in valve body: the valve body bottom is connected with the sealing seat bottom; the bell jar flap realizes that with sealing seat concave-convex shape is tightly connected under the effect of load maintainer; be provided with pressure-bearing bar and O-ring seals between the two; the unlatching of safety valve rises the bell jar flap by the pressure-bearing masthead and realizes; positioning disk is installed in the valve body upper end; the valve gap lower end is connected movingly with bell jar flap top; valve gap is fastenedly connected in the valve body upper end by the connecting bolt nut; spring lower end in the valve gap is connected with bell jar flap upper end; the upper end is connected with upper spring seat; screw press is connected with valve gap upper end internal thread; and pass through upper spring seat; spring applies the sealing pretightening force to the bell jar flap; locking nut is installed in the valve gap top and is threaded with screw press; play the effect that the screw press of having adjusted is locked; bonnet is connected with the valve gap upper external screw thread, plays the effect of protection screw press and locking nut.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve, design has the pressure relief opening that is no less than 2 symmetries or equiblibrium mass distribution on the sidewall of its sealing seat, the total sectional area of pressure relief opening is not less than the sectional area of safety valve runner, each design of sealing seat outer wall pressure relief opening upper and lower has a groove that the O RunddichtringO is installed, the design of sealing seat crown center has a hole that cooperates with the pressure-bearing bar, also design the groove that has the O RunddichtringO is installed in the hole, the O RunddichtringO all is installed in each seal groove.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve, its bell jar flap is connected with the mutual concave-convex shape motive sealing of sealing seat under the effect of load maintainer, bell jar flap top has half deep hole and the pressure compensation opening that are connected with the pressure-bearing bar, and the upper end, top is connected with spring.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve, its pressure-bearing bar is two sections designs of size diameter, and major diameter epimere and bell jar flap half deep hole are connected, and the centre has pressure compensation opening, and the minor diameter hypomere cooperates with the sealing seat motive sealing.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve has a circular hole in the middle of its pilot seal dish and cooperates with the top motive sealing of bell jar flap, also designs the groove that has the O RunddichtringO is installed in the middle of the circular hole, and the O RunddichtringO is installed in the groove.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve, its load maintainer comprises valve gap, spring, upper spring seat, screw press, locking nut etc., bell jar flap top is connected with upper spring seat by spring, upper spring seat is connected with screw press, screw press is fixed on the valve gap by screw thread and locking nut, can regulate the Set pressure of safety valve.
Above-described pressure-bearing bar belljar valve flap seal formula safety valve; when safety valve is loaded less than Set pressure; the bell jar flap is sealed the pressure relief opening on the sealing seat sidewall fully; when the safety valve load meets or exceeds Set pressure; increasing along with load; the pressure-bearing bar overcomes the sealing pretightening force of load maintainer gradually with bell jar flap jack-up; but the sealing seat pressure relief opening is exhaust pressure relief just; thereby reach the purpose of protection bearing device or pipe safety; when safety valve load drops to or during low Set pressure; minimizing along with load; the bell jar flap is under the effect of load maintainer; overcome by pressure medium through pressure-bearing bar institute applied pressure, gradually the sealing seat pressure relief opening is sealed again, thereby recover proper functioning.
Advantage of the present utility model:
1. the utility model pressure-bearing bar belljar valve flap seal formula safety valve, because the bearing area of pressure-bearing bar is thick-and-thin, and be not subjected to the influence of back pressure, the action that safety valve bell jar flap is opened discharging is to strengthen gradually with the rising of pressure medium until reaching maximum discharging, reduce with pressure medium again and reducing gradually until returning seat, do not have unexpected take-off and return the seat action, it is all very steady to open and return seat, can not produce chatter and flutter phenomenon.
2. the utility model pressure-bearing bar belljar valve flap seal formula safety valve, because pressure-bearing rod area and safety valve cross section of fluid channel are long-pending irrelevant, the axial pressure of safety valve working medium only just acts on the bell jar flap after by the pressure-bearing bar, the comparatively safe valve cross section of fluid channel of the sectional area of the axial pressure-bearing of pressure-bearing bar is long-pending little, the sealing preload pressure that load maintainer need load is corresponding also little, use on high pressure, bigbore safety valve, its load maintainer just can manufacture and design lightly than the conventional security valve.
Description of drawings
Fig. 1 is the sectional arrangement drawing of the utility model pressure-bearing bar belljar valve flap seal formula safety valve.
Fig. 2 is the sectional view of the utility model pressure-bearing bar belljar valve flap seal formula safety valve parts sealing seat.
Fig. 3 is the sectional view of the utility model pressure-bearing bar belljar valve flap seal formula safety valve parts bell jar flap.
Fig. 4 is the sectional view of the utility model pressure-bearing bar belljar valve flap seal formula safety valve parts pressure-bearing bar.
Fig. 5 is the sectional view of the utility model pressure-bearing bar belljar valve flap seal formula safety valve parts positioning disk.
Among the figure, 1 is that valve body, 2 is that sealing seat, 3 is that bell jar flap, 4 is that pressure-bearing bar, 5 is that O-ring seals, 6 is that positioning disk, 7 is that connecting bolt nut, 8 is that valve gap, 9 is that spring, 10 is that upper spring seat, 11 is that screw press, 12 is that locking nut, 13 is a bonnet.
Embodiment
As shown in Figure 1; a kind of pressure-bearing rod seal formula safety valve; by valve body (1); sealing mechanism; valve gap (8) and load maintainer are formed; the sealing mechanism design is in valve body (1): valve body (1) bottom is connected with sealing seat (2) bottom; bell jar flap (3) realizes that with sealing seat (2) concave-convex shape is tightly connected under the effect of load maintainer; also be provided with pressure-bearing bar (4) and O-ring seals (5) between the two; the unlatching of safety valve is realized by pressure-bearing bar (4) jacking bell jar flap (3); positioning disk (6) is connected movingly with bell jar flap (3) top and is installed on the valve body (1); valve gap (8) lower end; valve gap (8) is fastenedly connected in valve body (1) upper end by connecting bolt nut (7); its inner spring (9) lower end is connected with bell jar flap (3) upper end; the upper end is connected with upper spring seat (10); screw press (11) is connected with internal thread on valve gap (8); and bell jar flap (3) is applied the sealing pretightening force by upper spring seat (10) and spring (9); locking nut (12) is installed in valve gap (8) top and is threaded with screw press (11); play the effect that the screw press of having adjusted (11) is locked; bonnet (13) is connected with valve gap (8) upper external screw thread, plays the effect of protection screw press (11) and locking nut (12).
The comparison of flap sealed safety valve sealing preload pressure and pressure-bearing bar belljar valve flap seal formula safety valve sealing preload pressure:
If: the sealing preload pressure Py of plane flap sealed safety valve
[putting down], the sealing preload pressure Py of pressure-bearing bar belljar valve flap seal formula safety valve
[cover], the Set pressure of safety valve is that Pz, cross section of fluid channel are long-pending for Ad, pressure-bearing rod area are Ac,
Then: the sealing preload pressure Py of plane flap sealed safety valve
[putting down]=Pz * Ad,
The sealing preload pressure Py of pressure-bearing bar belljar valve flap seal formula safety valve
[cover]=Pz * Ac;
Obviously, Ac is little than Ad, so pressure-bearing bar belljar valve flap seal formula safety valve preload pressure Py
[cover]Than plane flap sealed safety valve preload pressure Py
[putting down]Little, the pass between them is:
Py
[putting down]/ Py
[cover]=Ad/Ac,
Py
[cover]=(Ac/Ad) Py
[putting down]
That is: pressure-bearing rod area Ac is littler several times than the long-pending Ad of cross section of fluid channel, pressure-bearing bar belljar valve flap seal formula safety valve preload pressure Py
[cover]Than plane flap sealed safety valve preload pressure Py
[putting down]Just little several times.
Claims (6)
1. pressure-bearing bar belljar valve flap seal formula safety valve, comprise valve body (1), sealing mechanism, valve gap (8) and load maintainer, the sealing mechanism design is in valve body (1), sealing mechanism comprises valve body (1), sealing seat (2), bell jar flap (3), pressure-bearing bar (4), pilot seal dish (6) and 4 O RunddichtringOs, load maintainer is located in the valve gap (8), load maintainer comprises valve gap (8), spring (9), upper spring seat (10), screw press (11), locking nut (12) etc., valve body (1) is installed in valve gap (8) below, and is fastenedly connected by connecting bolt nut (7); It is characterized in that: the pressure relief opening design of sealing seat (2) is at the sealing seat sidewall, bell jar flap (3) is realized being tightly connected with the mutual concave-convex shape of sealing seat (2) under the effect of pressure regulator, both are equipped with a pressure-bearing bar (4) between the top, the unlatching of safety valve is realized by pressure-bearing bar (4) jacking bell jar flap (3).
2. pressure-bearing bar belljar valve flap seal formula safety valve according to claim 1, it is characterized in that: design has the pressure relief opening that is no less than 2 symmetries or equiblibrium mass distribution on the sidewall of sealing seat (2), the total sectional area of pressure relief opening is not less than the sectional area of safety valve runner, each design of sealing seat (2) outer wall pressure relief opening upper and lower has a groove that the O RunddichtringO is installed, the design of sealing seat (2) crown center has a hole that cooperates with pressure-bearing bar (4), also designs the groove that has the O RunddichtringO is installed in the hole.
3. pressure-bearing bar belljar valve flap seal formula safety valve according to claim 1, it is characterized in that: bell jar flap (3) is connected for the concave-convex shape motive sealing with sealing seat (2), bell jar flap (3) top has half deep hole and a pressure compensation opening that is connected with pressure-bearing bar (4), and the upper end, top is connected with spring (9).
4. pressure-bearing bar belljar valve flap seal formula safety valve according to claim 1, it is characterized in that: pressure-bearing bar (4) is two sections designs of size diameter, major diameter epimere and bell jar flap (3) half deep holes are connected and have pressure compensation opening, and the minor diameter hypomere cooperates with sealing seat (2) motive sealing.
5. pressure-bearing bar belljar valve flap seal formula safety valve according to claim 1 is characterized in that: have a circular hole in the middle of the pilot seal dish (6) and cooperate with bell jar flap (3) upper end motive sealing, design has a groove that the O RunddichtringO is installed in the middle of the circular hole.
6. pressure-bearing bar belljar valve flap seal formula safety valve according to claim 1, it is characterized in that: load maintainer comprises spring (9), upper spring seat (8), screw press (9), locking nut (10), bell jar flap (3) top is connected with upper spring seat (8) by spring (7), upper spring seat (8) is connected with screw press (9), and screw press (9) is fixed on the valve gap (6) by screw thread and locking nut (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206866880U CN202001685U (en) | 2010-12-29 | 2010-12-29 | Pressure-bearing rod bell jar valve clack sealing type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206866880U CN202001685U (en) | 2010-12-29 | 2010-12-29 | Pressure-bearing rod bell jar valve clack sealing type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202001685U true CN202001685U (en) | 2011-10-05 |
Family
ID=44704426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206866880U Expired - Lifetime CN202001685U (en) | 2010-12-29 | 2010-12-29 | Pressure-bearing rod bell jar valve clack sealing type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202001685U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095006A (en) * | 2010-12-29 | 2011-06-15 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN103470217A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Low-voltage triggering type compression bar unstability wellhead shutdown valve |
| CN103470215A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Compression bar buckling triggering type wellhead safety valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN103711752A (en) * | 2013-12-27 | 2014-04-09 | 胜瑞兰工业设备（苏州）有限公司 | Pressure relief valve with function of automatic air exhaust on hydraulic oil cavity |
| CN103886922A (en) * | 2012-12-22 | 2014-06-25 | 阿海珐有限公司 | Pipe shut-off arrangement, and device for emergency supply coolant liquid and comprising such pipe shut-off arrangement |
| CN103968113A (en) * | 2013-09-16 | 2014-08-06 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN107816567A (en) * | 2017-11-20 | 2018-03-20 | 北京京诚科林环保科技有限公司 | Explosion venting device |
-
2010
- 2010-12-29 CN CN2010206866880U patent/CN202001685U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095006A (en) * | 2010-12-29 | 2011-06-15 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN102095006B (en) * | 2010-12-29 | 2012-07-25 | 江村 | Sealing type safety valve with bell jar valve clack of pressure bearing rod |
| CN103470217A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Low-voltage triggering type compression bar unstability wellhead shutdown valve |
| CN103470215A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Compression bar buckling triggering type wellhead safety valve |
| CN103470218A (en) * | 2012-06-08 | 2013-12-25 | 刘海亮 | Novel low-pressure triggering pressure lever instability shut-off valve |
| CN103886922A (en) * | 2012-12-22 | 2014-06-25 | 阿海珐有限公司 | Pipe shut-off arrangement, and device for emergency supply coolant liquid and comprising such pipe shut-off arrangement |
| CN103968113A (en) * | 2013-09-16 | 2014-08-06 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN103968113B (en) * | 2013-09-16 | 2017-02-01 | 北京航天动力研究所 | Low-pressure large-diameter safety valve |
| CN103711752A (en) * | 2013-12-27 | 2014-04-09 | 胜瑞兰工业设备（苏州）有限公司 | Pressure relief valve with function of automatic air exhaust on hydraulic oil cavity |
| CN103711752B (en) * | 2013-12-27 | 2016-08-24 | 胜瑞兰工业设备（苏州）有限公司 | The pressure relief valve of band automatic ventilating function on hydraulic fluid chamber |
| CN107816567A (en) * | 2017-11-20 | 2018-03-20 | 北京京诚科林环保科技有限公司 | Explosion venting device |
| CN107816567B (en) * | 2017-11-20 | 2023-11-10 | 北京京诚科林环保科技有限公司 | explosion venting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20120725 |