CN103236275A - Device for controlling state of particle falling switch - Google Patents
Device for controlling state of particle falling switch Download PDFInfo
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- CN103236275A CN103236275A CN201310141915XA CN201310141915A CN103236275A CN 103236275 A CN103236275 A CN 103236275A CN 201310141915X A CN201310141915X A CN 201310141915XA CN 201310141915 A CN201310141915 A CN 201310141915A CN 103236275 A CN103236275 A CN 103236275A
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- valve head
- particle
- orifice plate
- drive link
- blanking
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention provides a device for controlling the state of a particle falling switch. The device comprises a storage container and also comprises a storage container connecting section, a charging pore plate, a driving rod, a driving rod protecting sleeve, a guide tray and a valve head; the storage container connecting section is connected with the bottom of the storage container, the charging pore plate is fixedly connected to an outlet at the bottom of the storage container connecting section, and the charging pore plate is provided with a charging hole; the driving rod protecting sleeve is arranged on the central axis of the charging pore plate; the driving rod is arranged in the driving rod protecting sleeve; the guide tray is arranged at the lower end of the driving rod protecting sleeve; the valve head is connected to the tail end of the driving rod; and the charging pore plate, the driving rod protecting sleeve, the guide tray and the valve head are arranged coaxially. By utilizing a particle accumulation repose angle principle, the device can be used for effectively preventing particles from being crushed in the falling process when the valve head is closed.
Description
Technical field
The present invention relates to nuclear reactor engineering and safety technique field, particularly a kind of device of controlling particle whereabouts on off state.
Background technology
At present, pebble bed high temperature reactor has the reactive control of two covers and reactor shut-off system, and namely control rod system and KLAK system are used for guaranteeing security of operation and the shutdown of reactor.KLAK system has the falling sphere shutdown and strength is carried the standby function of return of serve.
The falling sphere shutdown function of KLAK system can realize into the absorption ball of the material (as boron carbide) that contains the energy intercept neutrons in right amount by declining to core reflector falling sphere duct.When reactor needed reactor startup, the absorption ball in the duct, reflection horizon (the common 5-10mm of diameter) need be released sent back in order to reusing.The return of serve of KLAK system can turn back to the absorption ball hold-up vessel (ball-storing tank) that is arranged in the reactor core top by the conveying of pipeline strength and be used for reusing realizing.The operating ambient temperature of hold-up vessel is about 250 ℃.
In the high temperature gas-cooled experimental reactor of ball bed formula 10MW that has formerly built up, what absorb that the switch control of ball whereabouts flow uses is ball-storing tank bottom feed opening from the structure of top shutoff (referring to Huang Zhiyong, Diao Xingzhong, the high temperature gas-cooled experimental reactor KLAK system of Zhou Huizhong .10MW thermal equipment test. Nuclear Science And Engineering, 2004,24(3): 230-234. and referring to Zhou H Z, Huang Z Y, Diao X Z.Design and verification test of the small absorber ball system of the HTR-10.Nuclear Engineering and Design, 2002,218:155-162.).For preventing when ball-storing tank bottom feed opening is closed, absorbing the crushed pollution reactor core of ball lateral reflection layer, will last till always that from absorbing the whole absorption ball dropping process that ball begins to fall absorbing ball all finishes and can not interrupt in whereabouts.In absorbing the ball dropping process, allow to interrupt absorbing the needs that ball falls owing to can not satisfy, bring big inconvenience therefore for the debugging of reactor and operation.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is to absorb in the ball dropping process at the ball bed high-temperature heap, how to realize that control absorption ball prevents that crushing from absorbing ball when interrupting.
(2) technical scheme
In order to address the above problem, the invention provides a kind of device of controlling particle whereabouts on off state, described device utilizes particle packing angle of repose principle, makes can effectively prevent the particle of crushing when closing valve head in the particle dropping process.
The device of control particle of the present invention whereabouts on off state comprises hold-up vessel, also comprises hold-up vessel linkage section, blanking orifice plate, drive link, drive link protective casing, guiding pallet, valve head; Described hold-up vessel linkage section is connected with the hold-up vessel bottom, and described blanking orifice plate is fixedly connected on hold-up vessel linkage section outlet at bottom, and described blanking orifice plate is provided with blanking hole; Described blanking orifice plate central axis arranges the drive link protective casing; Described drive link is arranged in the drive link protective casing; Described guiding pallet is arranged at drive link protective casing lower end; Described valve head is connected the drive link end; Described blanking orifice plate, drive link protective casing, guiding pallet and valve head are coaxial setting.
Further, the device of described control particle whereabouts on off state also comprises base hopper, block, set nut, labyrinth seal structure, set collar, valve head diaphragm seal; Described base hopper is connected in hold-up vessel linkage section bottom end face; Described base hopper inside surface is provided with block; Described valve head is connected the drive link end by set nut; Described valve head diaphragm seal is fixed in hold-up vessel linkage section bottom by set collar; Described valve head and blanking orifice plate bottom outer wall and drive link protective casing inwall all arrange labyrinth seal structure.
Wherein, described hold-up vessel shape of cross section can be circle, rectangle, square etc., but is not limited to aforementioned shapes, and described hold-up vessel linkage section is connected with the hold-up vessel bottom.
Wherein, described hold-up vessel linkage section inner boundary particle flow face is the conical surface.
Wherein, described blanking orifice plate is connected and fixed on hold-up vessel linkage section outlet at bottom, blanking hole is set is used for the particle flow whereabouts, and blanking orifice plate central axis arranges the drive link protective casing for the protection of drive link and motion guide.
Preferably, the blanking hole of described blanking orifice plate can be set to scallop hole, also can be set to slotted hole or circular hole.The minimum dimension that blanking hole is set is not less than 5 times of particle diameter, so that smooth and easy flow of particle and not stopping up.Metallic walls thickness between the adjacent blanking hole is set is not more than 3 times of particle diameter, so that uniform particles flows.
Wherein, described drive link protective casing top is fixed in the hold-up vessel, and described guiding pallet is static element, and drive link moves up and down and drives valve head and move up and down in the base hopper.Described guiding pallet is arranged on drive link protective casing lower end, is used for the load of the gravity direction of particle flow guiding and load bearing grain generation.
Wherein, described base hopper is connected by bolt with the hold-up vessel linkage section, and its inside surface arranges block and is used for restriction valve head smallest limit position, stops up because of the super design reference accident conditions to prevent the particle flow space.
Wherein, for expanding the applicability of this structure, labyrinth seal structure, set collar, valve head diaphragm seal are set, are beneficial to limit the quantity of gas leakage between particle hold-up vessel and the base hopper.
Wherein, described valve head and drive link lower end be by being threaded and set nut is set, and valve head upper limit and blanking orifice plate arrange idle motion in drive link direction of motion to be beneficial to compensate for heat expansion poor; Valve head and drive link protective casing inwall arrange mating surface and form motion guide, and labyrinth seal structure is set below this mating surface is beneficial to limit quantity of gas leakage; Valve head compresses valve head diaphragm seal formation hermetically-sealed construction and is beneficial to the restriction quantity of gas leakage in idle motion.Between the inboard particle surface of contact of valve head and the blanking orifice plate labyrinth seal structure is set and is beneficial to the restriction quantity of gas leakage.
Wherein, the lower surface of described blanking orifice plate, the guiding upper surface of pallet and the particle surface of contact of valve head inboard constitute the core of the device of described control particle whereabouts on off state jointly.Utilize particle packing angle of repose principle, be promoted to particle flow at the particle surface of contact of valve head inboard and pile up near the upper surface, realize the control to particle whereabouts on off state.
Wherein, particle surface of contact and the surface level of described guiding pallet have certain inclination angle, and it is relevant that the setting of this inclination angle minimum value and particle go out to flow the angle of repose.The minimum value that this inclination angle is set when structure space is limited is 10 °, and preferable range is 20 °-40 °.
Wherein, the distance that arranges between the particle inclined contact surface of blanking orifice plate bottom surface and guiding pallet is not less than 4 times of particle diameter, stops up preventing.
Wherein, the inboard particle surface of contact of valve head is lower than the guiding pallet when standard-sized sheet particle inclined contact surface is set and is beneficial to nearly parietal layer particle flow.
Wherein, block for preventing particle flow, the particle flow area of blanking orifice plate blanking hole formation and the particle flow area of guiding pallet and blanking orifice plate bottom formation are set, all greater than base feed hopper bottom outlet opening flow area.By the size of base feed hopper bottom outlet opening flow area is set, can adjust the size of particle whereabouts mass rate.Base feed hopper bottom particle falls to exporting eccentric setting and is beneficial to prevent arch camber.
Wherein, described guiding tray bottom surface arranges boss.
Wherein, described blanking orifice plate bottom surface arranges boss near the central axis side, and guiding pallet top forms the particle flow clear area near the zone of blanking orifice plate bottom, prevents that effectively valve head from closing the particle of crushing in the closed procedure.
Wherein, all sharp edges of wall contact region that particle flows through are set are fillet or chamfering abate, produce dust to prevent that particle from being scratched by wall in flow process.
Wherein, the particle surface of contact radical length that described valve head provides behind fillet at the mating surface place with the valve head diaphragm seal is less than half of particle diameter, the particle surface of contact that is provided by valve head makes particle not stablize stop at this face in the closed procedure of valve head pass, and is crushed when the valve head lifting puts in place to prevent small quantities of particles.
Preferably, above-mentioned particle is for absorbing ball particle, and described device is preferably the device that control absorbs ball particle whereabouts on off state.
(3) beneficial effect
The device of control particle of the present invention whereabouts on off state has following advantage:
(1) device of control particle of the present invention whereabouts on off state utilizes particle packing angle of repose principle, is driven to move upward by drive link at valve head can prevent the particle of crushing when closing; But idle motion compensation system thermal expansion difference is set; Labyrinth seal structure is set reduces the flow leakage amount.Thermal expansion difference compensation and flow leakage amount are limited the measure of considering, further strengthened the applicability of described device.
(2) device of control particle of the present invention whereabouts on off state can be discharged to close the dropping process in hold-up vessel and be interrupted particle and fall and the particle of not crushing at particle, and the debugging and the operation that can be the ball bed high-temperature heap bring a lot of facilities.
Description of drawings
Fig. 1 is the schematic representation of apparatus of control particle whereabouts on off state in the embodiment of the invention;
Fig. 2 is the vertical view of the fan-shaped blanking hole of blanking orifice plate of the device of control particle whereabouts on off state in the embodiment of the invention;
Fig. 3 is the vertical view of the blanking orifice plate Long Circle blanking hole of the device of control particle whereabouts on off state in the embodiment of the invention;
Fig. 4 is the vertical view of the circular blanking hole of blanking orifice plate of the device of control particle whereabouts on off state in the embodiment of the invention;
Wherein: 1: the hold-up vessel linkage section; 2: the blanking orifice plate; 3: drive link; 4: the drive link protective casing; 5: the guiding pallet; 6: valve head; 7: the base hopper; 8: block; 9: set nut; 10: labyrinth seal structure; 11: set collar; 12: the valve head diaphragm seal; 13: absorb ball particle; 21: blanking orifice plate bottom surface boss; 51: guiding tray bottom surface boss.
Embodiment
Be described in further detail below in conjunction with the device of drawings and Examples to control particle of the present invention whereabouts on off state.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
In description of the invention, need to prove, close the orientation of indications such as term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " or position is based on orientation shown in the drawings or position relation; only be the present invention for convenience of description and simplify and describe; rather than the device of indication or hint indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, need to prove that unless clear and definite regulation and restriction are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand above-mentioned term concrete implication in the present invention.
In addition, in description of the invention, except as otherwise noted, the implication of " a plurality of " is two or more.
As shown in Figure 1; the control of the embodiment of the invention absorbs the device of ball particle whereabouts on off state; be applied in the pebble bed high temperature reactor; described device comprises hold-up vessel, also comprises hold-up vessel linkage section 1, blanking orifice plate 2, drive link 3, drive link protective casing 4, guiding pallet 5, valve head 6, base hopper 7, block 8, set nut 9, labyrinth seal structure 10, set collar 11, valve head diaphragm seal 12, blanking orifice plate bottom surface boss 21, guiding tray bottom surface boss 51.
Described hold-up vessel linkage section 1 is connected with the hold-up vessel bottom.Described hold-up vessel is the container that can be connected with described hold-up vessel linkage section 1 arbitrarily, and its shape of cross section can be circle, rectangle, square etc., but is not limited to aforementioned shapes.It is the conical surface that described hold-up vessel linkage section 1 inner boundary absorbs the ball flow surface, and described blanking orifice plate 2 is connected and fixed on hold-up vessel linkage section 1 outlet at bottom.Described blanking orifice plate 2 arranges blanking hole and is used for absorbing ball particle 13 mobile whereabouts, and drive link protective casing 4 is set for the protection of drive link 3 and motion guide at blanking orifice plate 2 central axis.Described drive link protective casing 4 tops are fixed in the hold-up vessel, and drive link 3 is arranged in the drive link protective casing 4.
Valve head 6 is connected in drive link 3 ends by set nut 9, and with drive link protective casing 4 inwalls mating surface is set and forms motion guide, and labyrinth seal structure 10 is set below this mating surface is beneficial to limit quantity of gas leakage; Base hopper 7 is connected in hold-up vessel linkage section 1 bottom end face by bolt.Base hopper 7 inside surfaces evenly arrange three blocks 8, are used for restriction valve head 6 smallest limit positions, prevent from absorbing ball particle 13 flowing spaces and stop up because of the super design reference accident conditions.
Described valve head diaphragm seal 12 is fixed in hold-up vessel linkage section 1 bottom by set collar 11; Described valve head 6 all arranges labyrinth seal structure 10 with blanking orifice plate 2 bottom outer walls and drive link protective casing 4 inwalls.
The upper surface of the lower surface of blanking orifice plate 2, guiding pallet 5 and the absorption ball surface of contact of valve head 6 inboards, the common core that constitutes the device of control particle whereabouts on off state.Utilize particle packing angle of repose principle, be promoted at the absorption ball surface of contact of valve head 6 inboards and absorb ball and flow and pile up (shown in left side valve head dotted line position among Fig. 1) near the upper surface, realize absorbing the control of ball whereabouts on off state.
For the benefit of leading absorbs ball near the absorption ball inclined contact surface of pallet 5 and flows, and absorption ball surface of contact and surface level that guiding pallet 5 is set have certain inclination angle.To go out to flow the angle of repose relevant with absorbing ball in the setting of this inclination angle minimum value.The minimum value that this inclination angle is set when structure space is limited is 10 °, and preferable range is 20 °-40 °.
The distance that arranges between blanking orifice plate 2 bottom surfaces and the guiding pallet 5 absorption ball inclined contact surfaces is not less than 4 times that absorb ball particle 13 diameters, to prevent obstruction.
Arrange that valve head 6 is inboard to be absorbed the ball particle surface of contact are lower than guiding pallet 5 when standard-sized sheet absorption ball inclined contact surface and be beneficial to nearly parietal layer particle flow.
For preventing absorbing the ball flow blockage, absorption ball flow area and guiding pallet 5 and the absorption ball flow area that blanking orifice plate 2 bottoms constitute that blanking orifice plate 2 blanking holes provide are set, all lead to the cross section greater than base hopper 7 outlet at bottom orifice flows.By the size in the logical cross section of base hopper 7 outlet at bottom orifice flows is set, can adjust the size that absorbs ball whereabouts mass rate.Base hopper 7 bottom particles fall to exporting eccentric setting and are beneficial to prevent arch camber.
Wherein, valve head 6 upper limits and blanking orifice plate 2 arrange idle motion in drive link 3 direction of motion to be beneficial to compensate for heat expansion poor; Valve head 6 arranges mating surface with drive link protective casing 4 inwalls and forms motion guide, and labyrinth seal structure 10 is set below this mating surface is beneficial to limit quantity of gas leakage; Valve head 6 compresses valve head diaphragm seal 12 formation hermetically-sealed constructions and is beneficial to the restriction quantity of gas leakage in idle motion.Between valve head 6 inboard particle surface of contact and the blanking orifice plate 2 labyrinth seal structure is set and is beneficial to the restriction quantity of gas leakage.
Arrange valve head diaphragm seal 12 by set collar 11 by bolt in hold-up vessel linkage section 1 bottom.Valve head diaphragm seal 12 is the thin slice of metal material, and compression valve head diaphragm seal 12 formed mating surface (shown in valve head dotted line position in right side among Fig. 1) when valve head 6 was promoted to upper limit, was used for the quantity of gas leakage of 7 in restriction hold-up vessel linkage section 1 and base hopper.
Valve head 6 arranges suitable idle motion with blanking orifice plate 2 near upper limit, can compensate whole device along the thermal expansion difference of drive link 3 direction of motion.
When valve head 6 was promoted to upper limit, valve head 6 all arranged labyrinth seal structure with blanking orifice plate 2 bottom outer walls and drive link protective casing 4 inwalls, was used for further restriction quantity of gas leakage.
Guiding pallet 5 bottom surfaces have boss 51, and to increase and the valve head 6 inboard areas that cooperate that absorb the ball surface of contact, the minimizing dust enters in valve head 6 cavitys of guiding pallet 5 bottom surfaces.
The close central axis side in blanking orifice plate 2 bottom surfaces arranges boss 21, and guiding pallet 5 tops absorb the mobile clear area of ball near the zone formation of blanking orifice plate 2 bottoms, prevents that effectively valve head 6 from closing crushing absorption ball particle 13 in the closed procedures.
Arrange and absorb all sharp edges of wall contact region that ball flows through and all adopt fillet or chamfering abate, in flow process, scratched by wall and produce dust to prevent from absorbing ball particle 13.
The absorption ball particle 13 surface of contact radical lengths that valve head 6 provides behind fillet at the mating surface place with valve head diaphragm seal 12 are less than half of particle diameter.The absorption ball surface of contact that is provided by valve head 6 makes the absorption ball not stablize stop at this face in valve head 6 pass closed procedures, and is crushed when valve head 6 liftings put in place to prevent absorbing ball particle 13 on a small quantity.
As shown in Figure 2, the blanking hole of the blanking orifice plate 2 of the device of embodiment of the invention control particle whereabouts on off state is set to scallop hole, as shown in Figure 3-4, also can be set to slotted hole or circular hole.The minimum dimension that blanking hole is set is not less than 5 times that absorb ball particle 13 diameters, does not stop up in order to absorb smooth and easy the flowing of ball.The metallic walls thickness that arranges between the adjacent blanking hole is not more than 3 times that absorb ball particle 13 diameters, evenly flows so that absorb ball.
Form and the quantity of the blanking hole of the device of control particle of the present invention whereabouts on off state include but not limited to 3 cited scallop holes, 3 slotted holes and 8 circular ports.
The device that specifically describes control particle of the present invention whereabouts on off state below is applied to the falling sphere shutdown unit of high temperature gas cooled reactor KLAK system.
When stopping to absorb the ball whereabouts when interrupting the process that reactor is debugged and operation needs the absorption ball to release in hold-up vessel, the valve head 6 of drive link 3 bottoms is under the drive of drive unit, move upward and close to when to a certain degree and still not closing fully, because particle packing angle of repose principle, zone near blanking orifice plate 2 bottoms above guiding pallet 5 forms absorption ball stable-state flow clear area, absorbing ball no longer enters base hopper 7 and stops to fall the absorption ball of can not crushing.The mating surface of valve head 6 and valve head diaphragm seal 12 is behind rounding, and the absorption ball surface of contact that is provided by valve head 6 makes the absorption ball not stablize stop at this face in valve head 6 pass closed procedures, and it is crushed when valve head 6 is promoted to upper limit to prevent absorbing ball on a small quantity.When further poppet valve head 6 was to upper limit, valve head 6 compression valve head diaphragm seals 12 formed mating surface and are used for the restriction quantity of gas leakage.Valve head 6 is provided with the thermal expansion difference that idle motion is beneficial to compensate drive link 3 direction of motion when being promoted to upper limit.Valve head 6 all arranges labyrinth seal structure 10 with blanking orifice plate 2 bottom outer walls and drive link protective casing 4 inwalls and is used for further restriction quantity of gas leakage.
The device of the described control particle of simulation embodiment of the invention whereabouts on off state has carried out the actual effect confirmatory experiment.The absorption ball particle 13 that the glass bead of employing 6mm diameter is simulated same diameter has carried out closing the test that valve head 6 interrupts glass bead particle 13 dropping process.Base hopper 7 internal circulation spaces have adopted the organic glass material to constitute, in order to observe intuitively.Because particle packing angle of repose principle, when valve head 6 was not closed as yet fully, glass bead no longer entered in the base hopper 7 and stops to fall.The mating surface of valve head 6 and valve head diaphragm seal 12 is behind rounding, and the glass bead surface of contact that is provided by valve head 6 makes glass bead not prevent that a small amount of glass bead is crushed when valve head 6 is promoted to upper limit in the stable stop of this face in valve head 6 pass closed procedures.Test findings shows that valve head 6 is closed the glass bead of can not crushing in the glass bead dropping process, is not promoted to as yet when closing fully at valve head 6, and glass bead has interrupted and no longer entered in the base hopper 7, and valve head 6 is closed the glass bead of can not crushing.
The device of control particle of the present invention whereabouts on off state can be discharged to close the dropping process in hold-up vessel and be interrupted the particle whereabouts and the particle of not crushing at the absorption ball particle, and the debugging and the operation that can be the ball bed high-temperature heap bring a lot of facilities.
The device of control particle provided by the invention whereabouts on off state also can be used for other domain class like the whereabouts on off state control of particle.
Above embodiment only is used for explanation the present invention, and is not limitation of the present invention.The those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make a variety of changes and modification, so all technical schemes that are equal to also belong to category of the present invention, scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. a device of controlling particle whereabouts on off state comprises hold-up vessel, it is characterized in that, described device also comprises: hold-up vessel linkage section, blanking orifice plate, drive link, drive link protective casing, guiding pallet, valve head; Described hold-up vessel linkage section is connected with the hold-up vessel bottom, and described blanking orifice plate is fixedly connected on hold-up vessel linkage section outlet at bottom, and described blanking orifice plate is provided with blanking hole; Described blanking orifice plate central axis arranges the drive link protective casing; Described drive link is arranged in the drive link protective casing; Described guiding pallet is arranged at drive link protective casing lower end; Described valve head is connected the drive link end; Described blanking orifice plate, drive link protective casing, guiding pallet and valve head are coaxial setting.
2. device as claimed in claim 1 is characterized in that, described device also comprises base hopper, block, set nut, labyrinth seal structure, set collar, valve head diaphragm seal; Described base hopper is connected in hold-up vessel linkage section bottom end face; Described base hopper inside surface is provided with block; Described valve head is connected the drive link end by set nut; Described valve head diaphragm seal is fixed in hold-up vessel linkage section bottom by set collar; Described valve head and blanking orifice plate bottom outer wall and drive link protective casing inwall all arrange labyrinth seal structure.
3. device as claimed in claim 1 or 2 is characterized in that, the blanking hole of described blanking orifice plate is scallop hole, slotted hole or circular hole; The minimum dimension of described blanking hole is not less than 5 times of particle diameter; Metallic walls thickness between the adjacent blanking hole is not more than 3 times of particle diameter.
4. device as claimed in claim 1 or 2 is characterized in that, the particle surface of contact of described guiding pallet and the minimum value at surface level inclination angle are 10 °, and preferable range is 20 °-40 °.
5. device as claimed in claim 2 is characterized in that, the particle flow area of blanking orifice plate blanking hole formation and the particle flow area of guiding pallet and blanking orifice plate bottom formation is set, all greater than base feed hopper bottom outlet opening flow area.
6. device as claimed in claim 1 or 2 is characterized in that, the distance between the particle inclined contact surface of described blanking orifice plate bottom surface and guiding pallet is not less than 4 times of particle diameter.
7. device as claimed in claim 1 or 2 is characterized in that, the inboard particle surface of contact of described valve head is lower than the particle inclined contact surface of guiding pallet when standard-sized sheet.
8. device as claimed in claim 1 or 2 is characterized in that, described guiding tray bottom surface arranges boss, and described blanking orifice plate bottom surface arranges boss near the central axis side.
9. device as claimed in claim 2 is characterized in that, described valve head and blanking orifice plate arrange idle motion in drive link direction of motion; Described valve head compresses the valve head diaphragm seal and forms hermetically-sealed construction in idle motion.
10. device as claimed in claim 2 is characterized in that, all sharp edges of wall contact region that particle flows through is set is fillet or chamfering abate; The particle surface of contact radical length that described valve head provides behind fillet at the mating surface place with the valve head diaphragm seal is less than half of particle diameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310141915.XA CN103236275B (en) | 2013-04-22 | 2013-04-22 | Device for controlling state of particle falling switch |
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| CN201310141915.XA CN103236275B (en) | 2013-04-22 | 2013-04-22 | Device for controlling state of particle falling switch |
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| CN103236275A true CN103236275A (en) | 2013-08-07 |
| CN103236275B CN103236275B (en) | 2015-07-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566297A (en) * | 2022-01-28 | 2022-05-31 | 清华大学 | High-temperature gas cooled reactor absorption ball falling device |
| CN115171931A (en) * | 2022-06-24 | 2022-10-11 | 华能山东石岛湾核电有限公司 | Material level controllable ball falling device of high-temperature gas cooled reactor |
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| GB1291618A (en) * | 1970-06-12 | 1972-10-04 | British Nuclear Design Constr | Improvements in or relating to nuclear reactor shut-down systems |
| US4372912A (en) * | 1973-05-22 | 1983-02-08 | Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung | Method of controlling the reactivity of a gas-cooled core reactor |
| JP2002196091A (en) * | 2000-12-25 | 2002-07-10 | Kawasaki Heavy Ind Ltd | Backup shutdown rod |
| CN1447342A (en) * | 2003-04-04 | 2003-10-08 | 清华大学 | Second shutdown system of absorption ball applicable to gas-cooled reactor |
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2013
- 2013-04-22 CN CN201310141915.XA patent/CN103236275B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1291618A (en) * | 1970-06-12 | 1972-10-04 | British Nuclear Design Constr | Improvements in or relating to nuclear reactor shut-down systems |
| US4372912A (en) * | 1973-05-22 | 1983-02-08 | Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung | Method of controlling the reactivity of a gas-cooled core reactor |
| JP2002196091A (en) * | 2000-12-25 | 2002-07-10 | Kawasaki Heavy Ind Ltd | Backup shutdown rod |
| CN1447342A (en) * | 2003-04-04 | 2003-10-08 | 清华大学 | Second shutdown system of absorption ball applicable to gas-cooled reactor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566297A (en) * | 2022-01-28 | 2022-05-31 | 清华大学 | High-temperature gas cooled reactor absorption ball falling device |
| CN115171931A (en) * | 2022-06-24 | 2022-10-11 | 华能山东石岛湾核电有限公司 | Material level controllable ball falling device of high-temperature gas cooled reactor |
| CN115171931B (en) * | 2022-06-24 | 2024-01-23 | 华能山东石岛湾核电有限公司 | Material level controllable ball falling device for high-temperature gas cooled reactor |
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|---|---|
| CN103236275B (en) | 2015-07-15 |
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