CN1590819A - Safety valve for nucleus - Google Patents
Safety valve for nucleus Download PDFInfo
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- CN1590819A CN1590819A CN 03135708 CN03135708A CN1590819A CN 1590819 A CN1590819 A CN 1590819A CN 03135708 CN03135708 CN 03135708 CN 03135708 A CN03135708 A CN 03135708A CN 1590819 A CN1590819 A CN 1590819A
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Abstract
A high-safety valve for nuclear power unit is composed of three functional modules: safety release, fast isolation and forced opening or closing. It has a primary valve and a secondary valve. When external valve flap is closed, the safety release and secondary valve can be cut off at the same time. Its advatnages are small size, light weight, high reliability and long service life.
Description
1. technical field
The present invention relates to safety valve, particularly the nuclear safety valve.
Nuclear is the visual plant of examining in the overpressure protection system with safety valve.The nuclear open and close of safety valve, its performance not only will meet the requirement of examining standard, and wants and can open and close reliably.In case occur to open and close fault, as do not have remedial measure timely, all might cause reactor core to lose heating medium and burn.
The unlatching of safety valve is solved preferably, uses many safety valves as parallel connection.Because when system overpressure, can not open by all safety valves.But wherein as long as do not close after a safety valve is opened, as do not have remedial measure timely, just might cause the reactor core dehydration.
Be generally the Fail-closed of guaranteeing safety valve and do not cause system to lose too much heating medium, on safety valve, increase some manual remote operations, or the positive closing mechanism that controls with pressure gauge with electric contact.Its shortcoming is: one can not solve a large amount of leakage rates that main valve seat causes because of damage; Next is to rely on the outer energy to be used as driving force.The result who further develops is, on safety valve inlet or outlet conduit, and the quick separating valve of connecting.In case after opening, safety valve is not related to, separating valve quick closedown automatically under the pressure medium effect of protected system fast, and lasting discharging that safety valve is not related to cause or main valve seat damage a large amount of leakages that cause and are solved.Most typical example is France's nuclear safety valve group.It is to use two safety valves to be combined in series, and wherein one as safety relief valve, and the quick separating valve of another conduct (being referred to as separating valve).
Purpose of the present invention is to provide a kind of way that does not adopt two valves of series connection to solve to be not related to after safety valve is opened and causes system's dehydration, and it is by safe release function, the novel nuclear safety valve formed of isolation features and forced opening-closing function fast.
The working principle of safe release function as shown in Figure 1.When the inlet ozzle contains pressure medium water, when steam or gas, pressure medium makes main valve clack (33) produce a downward power, it constitutes sealing force between main valve clack (33) and the main valve seat (31) together with main valve preloading spring (27) to the partial action power of main valve clack (33), this power increases (see figure 3) with system pressure, meanwhile, by with main valve seat (31) and main valve seat (32) between the pulsed tube (29) that is communicated with of annulus, filter (21), pulsed tube (14), enter the pressure medium in the auxilliary valve body (18), give the sealing force between auxilliary flap (78) and the auxilliary valve seat (77).Along with system pressure rises, the active force that acts on bellows (7) upper-end surface constantly increases, and auxilliary valve control spring (3) and the compressed numerical value of bellows (7) also increase thereupon, and is adjustable in abutting connection with gap delta
1Constantly reduce.When system pressure rises to a certain pressure P c, adjustable in abutting connection with gap delta
1Be closed.At this moment, the sealing force between auxilliary flap (78) and the auxilliary valve seat (77) reaches maximum value (seeing Fig. 2).After this along with system pressure increases, the sealing force between auxilliary flap (78) and the auxilliary valve seat (77) reduces rapidly.Reach the cracking pressure definite value P of auxilliary valve when system pressure.The time, sealing power is reduced to zero.When system pressure increased a minimum again, auxilliary flap (78) just was separated from auxilliary valve seat (77), and pressure medium enters pulsed tube (76) from auxilliary opening of valves, flows to the cavity of resorption of piston (67) through admission spacing block (24).Because of the area of section of piston (67) effective pressure active area times over main valve clack (33).The following cavity pressure of piston (67) need not be raised to system pressure, the power that acts on piston (67) lower end surface affacts main valve clack (33) by main valve stem (28), make sealing force between main valve clack (33) and the main valve seat (31) from the maximum value prompt drop to zero (seeing Fig. 3).Main valve clack (33) is opened, the release pressure medium.When system pressure dropped to the closing pressure Pc of auxilliary valve, auxilliary flap (78) was closed, and the cavity of resorption of piston (67) is additional because of dielectric leakage does not have, main valve clack (33) is under the effect of pressure medium and preloading spring (27), close rapidly, keep sealing, thereby finish the safe release function.
The working principle of isolation features as shown in Figure 1 fast.Suppose that closing fault appears in the safe release function, main valve clack (33) is not closed.The result that main valve clack (33) is not related to makes system pressure continue to descend.Along with system pressure descends, control spring (3) is elongation constantly, pushes away that bellows plug (6) is constantly moved up.With bellows plug (6) be fixed together be connected urceolus (80) also with on move.The pull bar (15) affixed with being connected urceolus (80) pushes away to make with its affixed being connected on the urceolus (70) and moves, and makes in abutting connection with gap delta
2Constantly reduce.Below pressure drops to nuclear operating pressure interval during a certain pressure, in abutting connection with gap delta
2Be closed.After this along with the increase of system pressure drop-out value, the sealing force between auxilliary flap (74) and the auxilliary valve seat (19) reduces rapidly.When system pressure dropped to the force value of regulation, auxilliary flap (74) just was separated from auxilliary valve seat (19), and pressure medium enters pulsed tube (75) from auxilliary valve seat (19) outlet port, flows into the epicoele of piston (55) through end socket lid (56).Act on the power on the piston (55), back down little flap (50) by push rod (52), the pressure medium of piston (42) cavity of resorption flows to the outlet plenum of main valve again through the opening of pulsed tube (46) from little flap (50) through pulsed tube (57), (58).Under piston (42) effect of pressure medium in the above, produce a downward power, by pull bar (38), push away that main valve clack (34) is closed, the pressure medium flow of cutting off the pressure medium flow between main valve clack (33) and main valve seat (31) and entering auxilliary valve body (18).Thereby finished quick isolation features.Avoided the excessive bleed of preloading thermit powder.Usually closing fault appears in the safe release function of safety valve, comes into operation after repairing again.
The working principle of enforced opening function as shown in Figure 1.Make solenoid valve (60) energising open, the pressure medium of piston (42) epicoele through the opening of pulsed tube (61) solenoid valve (60), flows to the outlet plenum of main valve again through pulsed tube (59), (58).Piston (42) under the effect of pressure medium, produces a power that makes progress below, draws back main valve clack (33), discharge pressure medium by pull bar (38).Cut off the power supply of solenoid valve (60), solenoid valve (60) cuts out, and pressure medium enters the epicoele of piston (42) through pulsed tube (65), and piston (42) is set back.Main valve clack (33) is closed under the effect of preloading spring (27) and pressure medium, thereby finishes the enforced opening function.
The working principle of positive closing function as shown in Figure 1.Make solenoid valve (63) open, will be discharged into the main valve outlet plenum through pulsed tube (62) and (58) from the pressure medium of piston (42) cavity of resorption.Piston (42) produces a downward power under the effect of upper cavity pressure medium, by pull bar (38) main valve clack (34) is closed.Cut off the power supply of solenoid valve (63), the cavity of resorption of piston (42) is full of the pressure medium from cylinder liner (39) lower end aperture.Make the active force of the upper and lower end face of piston (42) be in balance, because the active force of pressure medium that acts on main valve clack (34) is greater than the active force of pressure spring (40), main valve clack (34) is kept and is closed, and keeps sealing, thereby finishes the positive closing function.
Safety valve just in case the safe release closing fault occurs, is met quick isolation features closing fault again in the course of the work, and (this kind probability of failure is minimum) can use the positive closing function.
As error operations, used the positive closing function, can use the enforced opening function to be recovered.
As starting once more after the reactor shutdown, after pressure reaches operating pressure, also can handle the enforced opening function, make the main valve clack (34) of quick isolation features be in opening state, simultaneously, by data shown in the pressure gauge of being adorned on the pressure tube shown in Figure 1 (12), judge whether main valve clack (34) is opened.
Use pressure gauge with electric contact to connect and cut off the power supply of solenoid valve, manual remote-controlled forced opening-closing can be become automatic forced opening-closing, make it become the automatic remedial measure of safe release and quick isolated fault.
2. background technique
At present, the safety valve with quick isolation features is a French Thebe nurse safety valve group, and it is used in pressurized-water reactor nuclear power plant, and it is to use two single functional safety valves to be cascaded to constitute.A single functional safety valve opening pressure definite value height (first valve) wherein, and the cracking pressure definite value of another single functional safety valve low (second valve).Under the situation of system's operating pressure, the first valve is in closed condition, and the second valve is in opening state.The first valve is connected with the discharge tube of system, and the inlet of second valve is connected with the exhaust port of first valve.Can not close when in a single day the first valve opens discharging decompressing, system pressure constantly descends, and when pressure was reduced to the closing pressure of second valve, the second valve cut out immediately, the lasting discharging of blocking-up first valve main valve.On two safety valves of series connection, increase some again and can implement enforced opening and positive closing with manual remote-controlled solenoid valve.
Two auxilliary valves of France's Thebe nurse safety valve group adopt fluid power to drive, and the temperature of employed pressure medium must be lower than 200 ℃, and the piston of two main valves adopts sylphon seal.When this valve is used in the pressurized water reactor power plant of High Temperature High Pressure; must be condensed into water from the water vapor in the protected system; and its temperature is cooled to below 200 ℃; can enter in the auxilliary valve; for this reason; this valve group need dispose a High Temperature High Pressure holding vessel that is used for the condensation cooling and can stores enough pressure mediums, though two main valves have been removed an inlet flange and outlet(discharge) flange in series connection.Two main valve bodies are linked to be a main valve body, form the member of a similar cuboid, with 900MW used in nuclear power station safety valve group body, its weight reaches 750Kg, if add holding vessel and other, its weight is very heavy.
France's Thebe nurse safety valve group, only be used in the pressurized water reactor power plant at present, as using in the nuclear power plant of non-condensing gas as heating medium, just there is a non-fluid power driving problems, when its temperature surpasses 200 ℃, just need a cooling system of configuration and the holding vessel that can store the sufficient amount heating medium.
France's Thebe nurse safety valve group is made up of the single functional safety valve of two identical in structure, when the high safety valve Fail-closed of cracking pressure definite value, just mean that also there is the possibility of Fail-closed in the low safety valve of cracking pressure, thereby homostructural safety valve has the probability of equal failure.
In France's Thebe nurse safety valve group, in case the close main valve that solve first valve of Fail-closed by second the single functional safety valve (second valve) in the series connection is not related to, but can not solve two auxilliary valve work failures and the loss of the pressure medium that causes as single functional safety valve (first valve) of safe release.
The main valve of France's Thebe nurse safety valve group uses sylphon seal, be to make two single functional safety valves institute that can be combined in series necessary, but its bellows will be subjected to high temperature action, is subjected to high temperature impact, damages easily.
3. summary of the invention
Novel nuclear safety valve provided by the invention, as shown in Figure 1, auxilliary valve is following, and relay valve is last, and main valve is placed in the middle, adds electromagnetism (60), (63) that can implement forced opening-closing.Connect accordingly by each pulsed tube, make it become an organic whole.The sealing force of all flaps and valve seat except that the preloading spring effect is arranged, mainly from the active force of pressure medium, is self-energized seal, does not have and leaks.Thereby we can say that novel nuclear also is a kind of no leakage safety valve with safety valve.
The internal feature of this valve main valve is, contain a pair of coaxial inside and outside main valve clack (33), (34 of arranging) that are in the main valve body (30), and a pair ofly be in coaxial inside and outside main valve seat (31), (32 of arranging), piston (42), (67) be in respectively main valve seat (31), (32) directly over and under.By main valve stem (28) lower piston (67) and main valve clack (33) are linked together, by pull bar (38) plug screw (37) be connected urceolus (36) upper piston (42) and main valve clack (34) are linked together.Two main valve seats (31) (32) are to twist solid in main valve body (30) from bottom to top in the mode that is threaded.
The axis of inlet ozzle and the main valve body (30) of vertical layout be axis normal up and down, the minimum point of ozzle inwall is a little more than main valve seat (31), (32), when being used in the pressurized water reactor power plant, steam in main valve chamber the hot water under the condensation can be topped main valve seat (31) (32).
The internal feature of auxilliary valve is, contains in the auxilliary valve body (18) a pair ofly to be in coaxial auxilliary flap (74), (78 of arranging up and down), and a pair ofly is in coaxial auxilliary valve seat (19), (77 of arranging up and down).Bellows (7) and control spring (3), all be in auxilliary valve seat (19), (77) under.By pull bar (15) will connect urceolus (70) up and down, (80) link together.Pressed solidly together horizontal bolt (73), (79) all with connecting moving up and down and moving of urceolus (80) by inner/outer tube, make δ
1And δ
2Making opposite direction changes.And connect urceolus (80) and connect inner core (10), use the upper end Joint of rivet (9) and bellows plug (6), weld mutually with bellows plug (6) upper end of bellows (7), weld mutually with pressure-bearing sleeve (8) lower end, the lower end of bellows plug (6) is by upper spring seat (4), be connected with control spring (3), the screw-in by adjusting screw (1) can adjust original delta
1And δ
2Value, thus set up the cracking pressure of safety valve release function and the closing pressure value of quick isolation features.
The inside of relay valve is levied and is, the unlatching of little flap (50) is to rely on push rod (52) with piston (55) Joint to move down it is backed down.Little flap (50) is a plane sealing, and the reverse side of sealing surface has a taper thin bar that leads, as shown in Figure 4.Its pilot hole is the garden cylindrical hole.Also can act in a diametrically opposite way, the thin bar that leads is the garden cylindricality, and pilot hole is taper, as shown in Figure 5
Here the solenoid valve of using as forced opening-closing (60), (63) are Through solenoid valve, are connected on respectively in pulsed tube (59), (61) and (62), (64).
Novel nuclear safety valve compared with prior art, has several tangible characteristics:
1) not to form because of novel nuclear with safety valve by two single functional safety valve tandem compounds, thereby there are not reusable main valve and an auxilliary valve, auxilliary in addition valve is the pressure medium-driven of the High Temperature High Pressure in the directly employing system, need not dispose condensation, cooling, and the holding vessel of energy high temperature high voltage resistant.Thereby volume is little, and is in light weight.
2) do not cool off holding vessel because of there being bulky condensation, thereby do not used the restriction of place and space size, can be used in various dissimilar nuclear power plants, purposes is wide.
3) as the pressure medium of auxilliary flap (74), (78) driving source, take from the annulus that constitutes between the main valve seat (31) (32).When the action of quick isolation features, main valve clack (34) is closed, and it not only can cut off the main valve stream of safe release, can cut off two auxilliary flaps (78), (74) simultaneously and open and be not related to or close because of blocking the pressure medium flow that solid particulate matter is caused.Thereby isolation features can thoroughly be finished the responsibility that its protection pressure medium does not run off fast.
4) because of main valve piston does not adopt sylphon seal, do not exist to be subjected to high temperature action and to impact flimsy problem, thereby the reliability height of main valve work.
5) safe release function does not belong to a kind of structure with quick isolation features, does not have the probability of equal failure, the reliability height.
When 6) being used in the pressurized water reactor power plant, topped condensation hot water on main valve seat (31), (32) is avoided from the hydrogen in the system, go out by the sealing face leakage between main valve clack (33), (34) and the seat of honour (31), (32), to decrease its sealing surface.Thereby the life-span of sealing surface work is long, because main valve body (30) is accepted the continuous heating of steam, coagulate water and coagulate the water periphery the pressure boundary temperature and be subjected to the temperature difference between the direct-fired pressure boundary of steam very little, during the safe release function action, the thermal shock that brings is very little.
4. description of drawings
Fig. 1 is the overall construction drawing of novel nuclear provided by the invention with safety valve.The auxilliary valve of this valve is following, and relay valve is last, and main valve is placed in the middle, and main and auxiliary valve, relay valve are the vertical layout of one, and forced opening-closing solenoid valve (60), (63) are connected on respectively in pulsed tube (59), (61) and pulsed tube (62), (64).Corresponding connection by each pulsed tube makes it become an organic whole.
Fig. 2 is that the novel nuclear of expression increases with the increase with system pressure of the auxilliary flap sealing force of the Safety function of safety valve, is dropped rapidly to the sealing characteristics curve of cracking pressure Po during to closing pressure Pc point.
Fig. 3 represents that novel nuclear changes two kinds of different sealing characteristics curves that inverse variation occurs with the main valve clack of the safe release function of safety valve and with the sealing force of bore Direct spring loaded safety valve flap with system pressure.
Fig. 4 represents relay valve, and the guide rod of the reverse side of little flap (50) sealing surface is the thin bar of taper, and the pilot hole of its pilot hole spare (48) is the structural drawing of garden cylindricality.
Fig. 5 represents in the relay valve that little flap (50) sealing guide rod is the thin bar of garden cylindricality, and the pilot hole of its pilot hole spare (48) is the structural drawing of taper.
Fig. 6 is that novel nuclear provided by the invention is arranged in right side or the left side that main valve is imported and exported with parallel the moving of the auxilliary valve of safety valve, is fixed together by link (85).Connect accordingly by each pulsed tube, make its each several part become the structure diagram of the novel nuclear of an organic whole with another embodiment of safety valve.
5. embodiment
Novel nuclear safety valve provided by the invention is made up of auxilliary valve, main valve, relay valve, forced opening-closing solenoid valve.The structure of main valve as shown in Figure 1, main valve seat (31), (32) are twisted solid in main valve body (30) from bottom to top in the mode that is threaded, the annulus that main valve seat (31), (32) constitute is connected with pulsed tube (29).Main valve clack (33) is topped on main valve seat (31), and with the main valve stem (28) that main valve clack (33) is fixed together, the screwed part in lower end is passed piston (67), with nut (26) main valve stem (28) is fixed on the piston (67).Act on the compressive force of the preloading spring (27) on the piston (67), act on the main valve clack (33), make its part become the pretension sealing force of main valve clack (33) by main valve stem (28).Another part is offset the compressive force of garden post helical spring (40), garden post helical spring (40) is installed between the bottom of piston (42) and cylinder liner (39), this compressive force be by the pull bar (38) that is fixed together with piston (42) and be connected with pull bar (38) be connected urceolus (36), and add melting welding and the main valve clack (34) that is connected urceolus (36) Joint threadably, pass to nut contacted (35) with it, nut (35) passes to its power on the main valve clack affixed with it (33), thereby offsets a part of pretightening force of preloading spring (27).
Cylinder liner (67) is packed in the main valve body (30) from bottom to top, is being pressed by seal washer (23), admission spacing block (24) and seal washer (68) by the upper end that is screwed into auxilliary valve body (18) wherein.Cylinder liner (42) is being pressed by seal washer (44) by the capping (45) that is screwed into wherein.
Admission spacing block (24) is connected with pulsed tube (76), and the aperture of the epicoele of piston (42) on cylinder liner (39) is connected with pulsed tube (61); Piston (42) cavity of resorption, the aperture on cylinder liner (39) is connected with pulsed tube (64).Be connected with pulsed tube (65) in the main valve inlet valve pocket.
The structure of auxilliary valve is assisted the outlet end of valve seat (77), (19) as shown in Figure 1, and topped in two auxilliary valve seats (77), the capping (16) of (19) outlet end, (17), is welded together with auxilliary valve body (18) respectively.Outlet end in auxilliary valve seat (77), (19) forms a capacitor that does not communicate with auxilliary valve body (18) inner chamber respectively, and this chamber is connected with pulsed tube (76), (75) respectively.Be seated in the auxilliary flap (78) on auxilliary valve seat (77), (19), the other end of (74) contacts with compressed little spring (81), (71).The compressive force of little spring (81), (71) constitutes auxilliary flap (78), (74) respectively to assisting the pretension sealing force of valve seat (77), (19).Horizontal bolt (79), (73) of passing the rectangular hole of auxilliary flap (78), (74) be connected inner core (10), (72) and be connected urceolus (80), (70) press solidly together.With the upper end of the bellows plug (6) of little spring (81), (71) contact and end socket (69) by rivet (9), (22) respectively be connected inner core (10), (72) and be connected urceolus (80), (70) are fixed together.Pull bar (15) is fixed on by set screw (13), (20) respectively and connects on urceolus (80), (70).The upper end of bellows (7) and bellows plug (6) are welded together, and lower end and pressure-bearing sleeve (8) are welded together.The lower end of bellows plug (6) contacts with the spring seat of honour (4), and control spring (3) is between the spring seat of honour (4) and the spring lower seat (2), and spring lower seat (2) contacts with adjusting screw (1).When being torqued into adjusting screw (1), compressed control spring (3) pushes away to make on the bellows plug (6) and moves, meanwhile, with its Joint be connected urceolus (80), (70), pull bar (15), horizontal bolt (79), (73) move up simultaneously, make in abutting connection with gap delta
1Value increases, δ
2Value reduces.Adjusting screw (1) is the form to be threaded, and twists in spring strut (5).Spring strut (5) is fixed on the auxilliary valve body (18) in the mode that is threaded, and presses pressure-bearing sleeve (8) and seal washer (11), to keep interior external sealed.The upper end of auxilliary valve body (18) is fixed on the main valve body (30) in the mode that is threaded, and compression seal packing ring (23), admission spacing block (24), seal washer (68), itself and main valve is separated by, and keeps external sealed.
The structure of relay valve as shown in Figure 1, little valve seat (51) is with the mode and relaying valve body (82) Joint of melting welding, the taper of topped little flap (50) on little valve seat (51) the thin bar that leads, stretch in the garden cylindrical hole of guiding element (48), guiding element (48) is being pressed by the relaying valve body (82) that is screwed into capping (45), seal washer (47) is kept external sealed, be compressed in the compressive force of the little spring (49) between little flap (50) and the guiding element (48), become the initial pretension sealing force of little flap (50), mode and push rod (52) Joint of piston (55) to be threaded, push rod (52) enters in the little valve seat (51) through guide pad (53), piston (55) moves down, can back down little flap (50) by push rod (52), the capping (56) of piston (55) top adds the mode and relaying valve body (82) Joint of melting welding with screw thread.Piston (55) epicoele communicates with pulsed tube (75), and the entrance cavity of little valve seat (51) communicates with pulsed tube (46).
Two solenoid valves (60) of forced opening-closing, (63) are connected on respectively in pulsed tube (59), (61) and pulsed tube (62), (64).
The Placement of pulsed tube as shown in Figure 1, weld mutually with main valve body (30) pulsed tube (29) upper end, the annulus that forms with two main valve seats (31), (32) communicates, weld mutually with filter (21) lower end, the lower end and the auxilliary valve body (18) of the pulsed tube (14) that welds mutually with filter (21) lower end weld mutually, communicate with the entrance cavity of auxilliary valve seat (77).Weld mutually with main valve body (30) upper end of pulsed tube (76), communicate with the cavity of resorption of piston (67), weld mutually with auxilliary valve body (18) lower end, communicate with the outlet plenum of auxilliary valve seat (77), weld mutually with capping (56) upper end of pulsed tube (75), communicate with the epicoele of piston (55), weld mutually with auxilliary valve body (18) lower end, communicates with the outlet plenum of auxilliary valve seat (19).The left end and the main valve body (30) of the pulsed tube (61) that welds mutually with the inlet ozzle of solenoid valve (60) weld mutually, communicate with the epicoele of piston (42); The left end and the main valve body (30) of the pulsed tube (64) that welds mutually with the inlet ozzle of solenoid valve (63) weld mutually, communicate with the cavity of resorption of piston (42); The right-hand member of the pulsed tube (59) that welds mutually with the outlet ozzle of solenoid valve (60) welds mutually with pulsed tube (58) and communicates with its tube chamber; The right-hand member and the pulsed tube (58) of the pulsed tube (62) that welds mutually with the outlet ozzle of solenoid valve (63) weld mutually, and communicate with its tube chamber.The left end of pulsed tube (57) welds mutually with relaying valve body (82), communicates with the outlet plenum of little valve seat (51); Right-hand member welds mutually with pulsed tube (58), and communicates with its tube chamber.Weld mutually with relaying valve body (82) upper end of pulsed tube (58), communicates with the cavity of resorption of piston (55), and weld mutually with the outlet ozzle of main valve body (30) lower end, communicates with the outlet tube chamber of main valve body (30).
Claims (3)
1. novel nuclear safety valve, it is made up of main valve, auxilliary valve, relay valve and forced opening-closing solenoid valve, and auxilliary valve is descending, and relay valve is last, and main valve is placed in the middle.The forced opening-closing solenoid valve is connected on pulsed tube (59) respectively, (61) and pulsed tube (62), (64) between, it is a kind of vertical layout, corresponding connection by each pulsed tube, constitute an organic whole, it is characterized in that being provided with in the main valve body (30) a pair of coaxial inside and outside main valve seat of arranging (31) that is in, (32) and a pair ofly be in the coaxial inside and outside main valve clack of arranging (33), (34), piston (42), (67) be in main valve seat (31) respectively, (32) directly over and under, upper piston (42) is by the pull bar affixed with it (38), plug screw (37), connect urceolus (36) and main valve clack (34) Joint, lower piston (67) is by main valve stem affixed with it (28) and main valve clack (33) Joint; Be provided with a pair of coaxial auxilliary valve seat of arranging up and down (19) that is in the auxilliary valve body (18), (77) and a pair ofly be in the coaxial auxilliary flap of arranging up and down (74), (78), pull bar (15) is by screw (13), (20) be separately fixed at connection urceolus (80), (70) on, rivet (9), (22) will connect urceolus (80) respectively, (70) be connected inner core (10), (72) rivet clasp together, horizontal bolt (79), (73) pressed solidly in the upper-end surface and the lower end surface that is connected inner core (72) that connect inner core (10) respectively, on being connected urceolus (80) top and the interior edge face that is connected urceolus (70) bottom, connect urceolus (80), (70) and the moving up and down of pull bar (15), horizontal bolt (79), (73) follow and move up and down, make horizontal bolt (79), (73) with auxilliary flap (78), (74) constitute between in abutting connection with gap delta
1The value and in abutting connection with gap delta
2Value is done rightabout variation; The unlatching of the little flap (50) of relay valve is to rely on piston (55) to move down the push rod (52) that makes with its Joint to move down, it is backed down, the pressure medium that the pressure medium that piston (55) is moved down emits from the unlatching of assisting flap (74), the pressure medium in the auxilliary valve pocket is from the annulus that constitutes between main valve seat (31), (32).
2. according to another embodiment of the described safety valve of claim 1, it is characterized in that auxilliary valve is arranged in the right side (or left side) that main valve is imported and exported, and is fixed on the main valve body (30) by link (85).
3. according to the described safety valve of claim 1, the reverse side that it is characterized in that the sealing surface of little flap (50) is provided with the taper thin bar that leads, and pilot hole is the garden cylindricality, or acts in a diametrically opposite way, and the thin bar that leads is the garden cylindricality, and pilot hole is taper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031357083A CN100386547C (en) | 2003-08-29 | 2003-08-29 | Safety valve for nucleus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031357083A CN100386547C (en) | 2003-08-29 | 2003-08-29 | Safety valve for nucleus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1590819A true CN1590819A (en) | 2005-03-09 |
| CN100386547C CN100386547C (en) | 2008-05-07 |
Family
ID=34597205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031357083A Expired - Fee Related CN100386547C (en) | 2003-08-29 | 2003-08-29 | Safety valve for nucleus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100386547C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557346A (en) * | 2012-04-17 | 2014-02-05 | 巴布科克和威尔科克斯M能量股份有限公司 | Crdm divert valve |
| CN109723897A (en) * | 2017-10-27 | 2019-05-07 | 赵斌 | Zero energy consumption normally-open normally-close solenoid valve of big flux |
| CN109764168A (en) * | 2017-11-09 | 2019-05-17 | 赵斌 | Exclude thermal shock safety valve |
| CN110296257A (en) * | 2018-03-22 | 2019-10-01 | 赵斌 | Novel zero energy consumption normally-open normally-close solenoid valve of big flux |
| CN112096937A (en) * | 2020-09-09 | 2020-12-18 | 赵斌 | Novel large-flux high-temperature high-pressure electromagnetic release valve |
| CN112823255A (en) * | 2018-10-10 | 2021-05-18 | 艾默生过程管理调节技术公司 | Emergency shutdown safety assembly for providing redundant safety shutdown |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59507352D1 (en) * | 1994-09-13 | 2000-01-05 | Siemens Ag | SAFETY VALVE, ESPECIALLY PRESSURE RELIEF VALVE AND PRESSURE RELEASE VALVE |
| CN2310906Y (en) * | 1997-02-01 | 1999-03-17 | 哈尔滨工程大学 | Spring direct acting safety valve with external balance mechanism |
| CN1098431C (en) * | 1997-10-13 | 2003-01-08 | 赵文轩 | leakless safety valve |
| JP4527859B2 (en) * | 2000-08-28 | 2010-08-18 | 東亜バルブエンジニアリング株式会社 | Relief safety valve with a forced operating device |
-
2003
- 2003-08-29 CN CNB031357083A patent/CN100386547C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557346A (en) * | 2012-04-17 | 2014-02-05 | 巴布科克和威尔科克斯M能量股份有限公司 | Crdm divert valve |
| CN109723897A (en) * | 2017-10-27 | 2019-05-07 | 赵斌 | Zero energy consumption normally-open normally-close solenoid valve of big flux |
| CN109723897B (en) * | 2017-10-27 | 2020-10-16 | 赵斌 | Large-flux normally open normally closed electromagnetic valve |
| CN109764168A (en) * | 2017-11-09 | 2019-05-17 | 赵斌 | Exclude thermal shock safety valve |
| CN109764168B (en) * | 2017-11-09 | 2020-06-12 | 赵斌 | Safety valve for eliminating thermal shock |
| CN110296257A (en) * | 2018-03-22 | 2019-10-01 | 赵斌 | Novel zero energy consumption normally-open normally-close solenoid valve of big flux |
| CN110296257B (en) * | 2018-03-22 | 2020-11-10 | 赵斌 | Novel large-flux normally open normally closed solenoid valve |
| CN112823255A (en) * | 2018-10-10 | 2021-05-18 | 艾默生过程管理调节技术公司 | Emergency shutdown safety assembly for providing redundant safety shutdown |
| CN112096937A (en) * | 2020-09-09 | 2020-12-18 | 赵斌 | Novel large-flux high-temperature high-pressure electromagnetic release valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100386547C (en) | 2008-05-07 |
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