CN209084141U - A kind of nuclear energy safety relief valve and position indicator device - Google Patents

Abstract

The utility model relates to a kind of nuclear energy safety relief valve and position indicator devices, including shell, the interior of shell is provided with cunning chamber open at one end, guide rod is provided in the sliding chamber, being provided between the sliding chamber and guide rod has the elastic component of the kinetic-potential outside sliding chamber for making guide rod always, the shell deviates from sliding chamber open end is provided with the differential inductive displacement sensor whether moved for detecting guide rod, it can guarantee that safety relief valve displacement of valve rod and position can be in time, it is accurate monitored, reliability with higher, and have the advantages that use cost is low, and shell directly can be removed into maintenance in later period maintenance and maintenance, convenience easy to maintenance.

Description

A kind of nuclear energy safety relief valve and position indicator device

Technical field

The utility model relates to the technical field of Nuclear Safety relief valve, more particularly, to a kind of nuclear energy safety relief valve and Position indicator device.

Background technique

Pilot-operated type safety relief valve is one of important equipment of pressurized-water reactor nuclear power plant, as the primary Ioops system under accident conditions System safety guarantee, directly affects nuclear power station reliability of operation and safety, when the pressure rise in system and is more than safety valve Setting valve when, safety valve automatically turn on, by main valve member exhaust system medium, anti-locking system continues to boost；Work as pressure drop It when as low as blow pressure, can close in time automatically, guarantee that system continues to be safely operated.The function of main valve is exactly to realize system media Discharge.When superpressure operating condition occurs for nuclear reactor system, if safety valve main valve is not turned on or does not return seat after opening, it will draw Play serious accident.

The patent application of application publication number CN106286959A discloses a kind of main valve for pilot operated safety valve system Device, including upper cover and valve body, upper cover top are provided with position indicator；Upper cover bottom end is arranged in valve body upper end, on Location sensitive block and connecting rod are disposed with inside end socket from top to bottom, sensor block passes through with connecting rod to be connect；Valve inner It is disposed with reset spring, valve rod, piston component, flap component and valve seat from top to bottom, the valve rod is connect with connecting rod, Piston component is arranged on the valve rod in steel lining, and stem bottom is provided with flap, and flap is fitted closely on valve seat, valve seat It is fixed on body base, reset spring is set on valve rod, and reset spring top acts in upper cover, and reset spring bottom end is made With on piston component；Valve body upper side is provided with multiple runner holes, and runner hole is connected to the intracorporal main valve piston chamber of valve, valve body Upper side is provided with main valve inlet, and valve body bottom end offers Main valve outlet.When safety valve is on and off, valve rod will be along it It is axially displaced.

Pilot-operated type safety relief valve body cannot directly display open and close state and the valve rod present position of current valve, because This must detect the displacement of valve rod using position indicator, and current valve phase indicator all relies on import, use Higher cost.

Utility model content

The first of the utility model is designed to provide a kind of nuclear energy safety relief valve position indicator device, has and uses Advantage at low cost.

Above-mentioned first purpose of the utility model has the technical scheme that a kind of nuclear energy safety relief Valve position indicator device, including shell, the interior of shell are provided with cunning chamber open at one end, are provided with and lead in the sliding chamber Bar, being provided between the sliding chamber and guide rod has the elastic component of the kinetic-potential outside sliding chamber for making guide rod always, described outer Shell deviates from sliding chamber open end is provided with the differential inductive displacement sensor whether moved for detecting guide rod.

Through the above technical solutions, in use, shell is mounted on safety valve, and make the open end of sliding chamber towards peace Inside full valve, and guide rod is allowed to protrude into safety valve, elastic component will push guide rod to contact always with valve rod, if axial move occurs for valve rod It is dynamic, guide rod will be pushed to move, it is mobile to will test guide rod for difference induction formula sensor at this time, and then exports corresponding letter Number, so that people are conveniently clearly understood that whether valve rod moves, and then judge whether safety valve is opened, since equipment is complete Can oneself assembling and installation, therefore its cost is relatively low, using can save more cost after on safety relief valve, and Shell directly can be removed into maintenance, convenience easy to maintenance when later period maintenance and maintenance.

Preferably, the differential inductive displacement sensor includes the metal bone that shell is arranged in and deviates from sliding chamber open end Frame, the first coil being wound around in metallic framework, the second coil and the magnetizer that guide rod deviates from sliding chamber open end is set, it is described Magnetizer is located at first coil and the second coil inside, and the metallic framework surrounding housing is arranged, and is arranged in the metallic framework There are two around line chamber, described to be arranged around line chamber away from shell side opening, the first coil and the second coil are set around coiling In chamber, first coil and the second coil and two correspond around line chamber, and the metallic framework open end is provided with lid.

Through the above technical solutions, passing through the driving voltage of external input certain frequency, when magnetizer is in first coil When with the middle position of the second coil, first coil is equal with the induced electromotive force that the second coil generates, and such output voltage is Zero, when magnetizer is mobile in first coil and the second coil inside and deviates the two center, first coil and the second line The induced electromotive force that circle generates differs, and has a voltage output, and output voltage size depends on the size of displacement, and the electricity exported The displacement of pressure value and magnetizer is linear, thus the moving distance of magnetizer can be obtained according to linear relationship, i.e., It is exactly the moving distance of guide rod, when detection, is simple and convenient, simultaneously because the device is used in nuclear power station, therefore first coil and the Two coil can work in high temperature, high radiation environment, and first coil and the second coil can be carried out by setting lid and When safeguard.

Preferably, the encapsulating glue-line of high temperature resistant irradiation is provided between the lid and first coil and the second coil.

Through the above technical solutions, by with the encapsulating glue-line of high temperature resistant, resistance to high irradiation by first coil and the second coil It is packaged, so that the device is suitable for the high irradiation that nuclear power station scene is likely to occur, the operating condition of high temperature.

Preferably, the insulation of high temperature resistant irradiation is provided between the metallic framework and first coil and the second coil Layer.

Through the above technical solutions, to avoid first coil and the second coil in high temperature, high irradiation and metal bone Frame conducting, is isolated between first coil, the second coil and metallic framework using the insulating layer of excellent insulation performance, it is ensured that Equipment steady operation.

Preferably, the shell is located on the outer wall of sliding chamber open end and is provided with for locking screw thread with safety valve.

Through the above technical solutions, the device is mounted on safety valve for convenience, it is provided with locking screw on the shell Line, in use, shell and safety valve are linked together by locking screw.

Preferably, thread bush is equipped with the locking nut for abutting with safety valve, the locking nut position on the shell Deviate from sliding chamber open side in locking screw.

Through the above technical solutions, shell holds after connecting with safety valve due to being easy to produce vibration etc. in nuclear power station Yi Yin shakes the generations such as steam and loosens, and in order to effectively prevent such case, is provided with locking nut on the shell, when will be outer After shell screws on safety valve, locking nut is rotated, so that locking nut is close to safety valve and contradicts with safety valve outer wall, at this time Locking nut will be generated between the locking screw and safety valve that make on shell and be abutted, and increase rubbing between shell and safety valve Power is wiped, so that shell is not easy because generating loosening between vibration and safety valve.

Preferably, the guide rod is stretched out outside shell, and guide rod be located at one end end outside shell be provided with it is smooth And wear-resisting spin.

Through the above technical solutions, when in use, the valve rod meeting in safety valve and generation friction between guide rod, by leading Spin is arranged in boom end, can be rolled between valve rod and guide rod with spin and reduce the frictional force between guide rod and valve rod, made Guide rod and valve rod while be not easy to be worn but also the axial movement of valve rod is not easy to be affected, that is, will not influence safety valve Sensitivity.

Preferably, the guide rod is provided with snap slot close to spin end.

Through the above technical solutions, some emergency case lower guide rods can be there is a phenomenon where blocking, so that valve rod is not easy to send out Raw to be axially moved, guide rod will affect stem movement at this time, so that safety valve cannot close or open in time, by guide rod On be provided with snap slot and may make valve rod stress is larger guide rod fractures when needing to open or close, and then avoid guide rod by valve rod Stuck to prevent the case where valve rod is from moving, until later period maintenance, then removable lower casing takes out the guide rod to fracture more The guide rod renewed, when use, are more safe and reliable.

The second of the utility model is designed to provide a kind of nuclear energy safety relief valve, has the advantages that use cost is low.

Above-mentioned second purpose of the utility model has the technical scheme that a kind of nuclear energy safety relief Valve further includes safe valve body, institute including a kind of nuclear energy safety relief valve position indicator device described in above-mentioned technical proposal Stating safe valve body includes shell and setting valve rod in the housing, is provided with inclined surface on the valve rod, the inclined surface with The setting at an acute angle of the central axis of valve rod, the shell side are provided with through-hole, and the shell is located at sliding chamber open end and is connected to In through-hole, the guide rod is located at one end and inclined surface conflict outside sliding chamber.

Through the above technical solutions, in use, offering through-hole along the axial direction of vertical valve rod on shell, then By in one end insertion through-hole of the shell with locking screw, in shell and and inclined surface will be inserted by being now placed in the guide rod in sliding chamber Contradict, due to the effect of flexible part, guide rod end will always with inclination face contact, when safe valve body is on and off When, valve rod will generate axial movement, and guide rod will move under the action of inclined surface is with elastic component at this time, pass through difference induction Formula displacement sensor can be detected out the movement of guide rod, and then judge valve rod moving distance, be clearly understood that safety valve sheet Whether body is on and off.

In conclusion the utility model having the beneficial effect that in contrast to the prior art

1, simple and convenient when detection stem movement, and detection structure assembling is simple and convenient, cost is relatively low；

2, in use due to there is the safeguard measures such as casting glue, the device use is in the high temperature such as nuclear power station, high irradiation It can also be worked normally for a long time when under equal environment；

3, by setting snap slot and spin, the reliability of equipment is increased.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of embodiment one；

Fig. 2 is the structural schematic diagram of embodiment two.

Appended drawing reference: 1, spin；2, guide rod；3, locking screw；4, sliding chamber；5, locking nut；6, elastic component；7, magnetic conduction Body；8, straight pin；9, metallic framework；10, shell；11, first coil；12, the second coil；13, encapsulating glue-line；14, lid； 15, snap slot；16, shell；17, valve rod；18, inclined surface；19, through-hole；20, around line chamber.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

Embodiment one:

As shown in Figure 1, a kind of nuclear energy safety relief valve position indicator device, including shell 10, it is arranged inside shell 10 There is cunning chamber 4 open at one end, guide rod 2 is provided in sliding chamber 4, is provided with elastic component 6 between sliding chamber 4 and guide rod 2, shell 10 deviates from Sliding 4 open end of chamber is provided with differential inductive displacement sensor, and elastic component 6 is spring, one end of spring and cunning in the present embodiment The connection of 4 inner wall of chamber, the other end are connect with guide rod 2, when the valve rod 17 in safety valve moves that drive leader 2 is mobile, differential at this time Inductive displacement transducer will test out the mobile signal of guide rod 2, and then judge whether safety valve is opened.

In use, 2 one end of guide rod stretch out shell 10 outside, guide rod 2 be located at one end end outside shell 10 be provided with it is smooth And wear-resisting spin 1, ball is made of zirconium oxide material in the present embodiment, while being provided with and fractureing close to 1 end of spin in guide rod 2 Slot 15.

Differential inductive displacement sensor includes that shell 10 is arranged in deviate from the metallic framework 9 of sliding 4 open end of chamber, be wound around First coil 11, the second coil 12 in metallic framework 9 and the magnetizer 7 that guide rod 2 deviates from sliding 4 open end of chamber is set, magnetic conduction Body 7 is located inside first coil 11 and the second coil 12, and magnetizer 7 is fixed on guide rod 2 by straight pin 8.

As shown in Figure 1, wherein the setting of 9 surrounding housing 10 of metallic framework, and there are two coilings for setting in metallic framework 9 Chamber 20 is being covered with a layer insulating around 20 inner wall of line chamber, and first coil 11 and the second coil 12 are set around in line chamber 20, For convenience in the coiling in line chamber 20 so that around line chamber 20 away from 10 side opening of shell setting, therefore can be convenient by around The open side of line chamber 20 carries out coiling, and first coil 11 and the second coil 12 with two around the one-to-one correspondence of line chamber 20, metal bone 9 open end of frame is provided with lid 14, in the encapsulating casting glue in line chamber 20 after 12 coiling of first coil 11 and the second coil Then lid 14 is covered the opening welding in metallic framework 9 again by layer 13, casting glue is by high temperature resistant, radiotolerant material It is made, is potted in the purpose that can play protection first coil 11 and the second coil 12 in line chamber 20.

Wherein, insulating layer is to avoid first coil 11 and the second coil 12 in high temperature, high irradiation and metal bone Frame 9 is connected, and insulating layer selects high temperature resistant, the material of radiation resistance and insulation.

Shell 10, which is located on the outer wall of sliding 4 open end of chamber, is provided with locking screw 3, and thread bush is equipped with and is used on shell 10 The locking nut 5 abutted with safety valve, locking nut 5 is located at locking screw 3 and deviates from sliding 4 open side of chamber, in use, by locking screw Line 3 is threaded on safety valve, then by rotating locking nut 5 locking nut 5 and safety valve outer wall is contradicted, and then allows shell 10 connect with safety valve it is even closer.

The differential inductive displacement sensor used in the present embodiment its working principle is that the prior art, as Shanghai wish it is quick from The XM-D21 series LVDT displacement sensor of Dong Hua equipment Co., Ltd production has just used similar principle, the utility model pair Cell winding part be made that it is some change so that differential inductive displacement sensor can be adapted for nuclear power station high temperature, In high radiation environment.Meanwhile the utility model is not limited only to the differential inductive displacement sensor selected in the present embodiment, two-wire Detection can be achieved in circle, the self-induction of multi-coil or mutual inductance electromagnetic sensor.

Wherein, encapsulating glue-line 13 can be obtained by epoxy resin modification, control the epoxide number of epoxy resin, and selection is suitable Curing agent, the proportion and dosage between speed, the degree of cross linking, rouge and packing density, each component to control reaction, improves casting glue Temperature tolerance, radiation resistance, adhesive force, air-tightness reduce the density of casting glue.High temperature resistant, radiotolerant can be selected in encapsulating glue-line 13 Casting glue.

Embodiment two:

As shown in Fig. 2, a kind of nuclear energy safety relief valve, including embodiment one, it further include safe valve body, safe valve body Including shell 16 and the valve rod 17 being arranged in shell 16, inclined surface 18, inclined surface 18 and valve rod 17 are provided on valve rod 17 Central axis setting at an acute angle, 16 side of shell are provided with through-hole 19, and shell 10 is located at sliding 4 open end of chamber and is connected to through-hole 19 In, guide rod 2 is located at one end and the conflict of inclined surface 18 outside sliding chamber 4.

In use, through-hole 19 is offered along the axial direction of vertical valve rod 17 on housing 16, then by 10 end of shell Interpolating unit enters in through-hole 19 and makes locking screw 3 and 19 inner wall of through-hole to cooperate, and the guide rod 2 being now placed in sliding chamber 4 will be inserted into shell It is contradicted in body 16 and with inclined surface 18, due to the effect of flexible part 6,2 end of guide rod will be contacted with inclined surface 18 always. When safe valve body is on and off, valve rod 17 will generate axial movement, and inclined surface 18 will generate opposite shifting between guide rod 2 Dynamic, the spin 1 for being now placed in 2 end of guide rod will roll, so that frictional force reduces between inclined surface 18 and guide rod 2, later Guide rod 2 will move under the action of inclined surface 18, then be realized by differential inductive displacement sensor to 2 position of guide rod And the detection of displacement, inductance is formed between first coil 11 and the second coil 12 by external input excitation, at magnetizer 7 When middle position, both ends inductance is identical, can form difference in inductance between two coils to any end movement, and pass through electricity The translation circuits such as bridge are acquired, then by conversion output number or analog signals, and then may determine that the position of valve rod 17 It sets and moving distance.

The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical Within novel protection scope.

Claims (9)

1. a kind of nuclear energy safety relief valve position indicator device, it is characterised in that: including shell (10), in the shell (10) Portion is provided with cunning chamber (4) open at one end, is provided with guide rod (2) in the sliding chamber (4), between the sliding chamber (4) and guide rod (2) It is provided with and is used for so that guide rod (2) has the elastic component (6) to sliding chamber (4) outer kinetic-potential always, the shell (10) is away from cunning Chamber (4) open end is provided with the differential inductive displacement sensor whether moved for detecting guide rod (2).

2. a kind of nuclear energy safety relief valve position indicator device according to claim 1, it is characterised in that: described differential Inductive displacement transducer includes being arranged deviate from the metallic framework (9) of sliding chamber (4) open end in shell (10), be wound around metal bone First coil (11), the second coil (12) and setting in frame (9) deviate from the magnetizer of sliding chamber (4) open end in guide rod (2) (7), the magnetizer (7) is located at first coil (11) and the second coil (12) inside, metallic framework (9) surrounding housing (10) it is arranged, it is described to be opened around line chamber (20) away from shell (10) side around line chamber (20) there are two settings in the metallic framework (9) Mouth setting, the first coil (11) and the second coil (12) are set around in line chamber (20), first coil (11) and second Coil (12) is corresponded with two around line chamber (20), and metallic framework (9) open end is provided with lid (14).

3. a kind of nuclear energy safety relief valve position indicator device according to claim 2, it is characterised in that: the lid (14) the encapsulating glue-line (13) of high temperature resistant irradiation is provided between first coil (11) and the second coil (12).

4. a kind of nuclear energy safety relief valve position indicator device according to claim 2, it is characterised in that: the metal The insulating layer of high temperature resistant irradiation is provided between skeleton (9) and first coil (11) and the second coil (12).

5. a kind of nuclear energy safety relief valve position indicator device according to claim 1, it is characterised in that: the shell (10) it is located on the outer wall of sliding chamber (4) open end and is provided with for locking screw thread (3) with safety valve.

6. a kind of nuclear energy safety relief valve position indicator device according to claim 5, it is characterised in that: the shell (10) thread bush is equipped with the locking nut (5) for abutting with safety valve on, and the locking nut (5) is located at locking screw (3) Away from sliding chamber (4) open side.

7. a kind of nuclear energy safety relief valve position indicator device according to claim 1, it is characterised in that: the guide rod (2) shell (10) are stretched out outside in one end, and are located at one end end of shell (10) outside in guide rod (2) and are provided with smooth and wear-resisting rolling Ball (1).

8. a kind of nuclear energy safety relief valve position indicator device according to claim 7, it is characterised in that: the guide rod (2) spin (1) end is provided with snap slot (15).

9. a kind of nuclear energy safety relief valve, it is characterised in that: including a kind of safety of nuclear energy described in claim 1 ~ 8 any one Pressure release valve position indicator device further includes safe valve body, and the safe valve body includes shell (16) and is arranged in shell (16) valve rod (17) in is provided with inclined surface (18) on the valve rod (17), in the inclined surface (18) and valve rod (17) The setting at an acute angle of mandrel line, shell (16) side are provided with through-hole (19), and the shell (10) is located at sliding chamber (4) open end It is connected in through-hole (19), the guide rod (2) is located at the one end of sliding chamber (4) outside and contradicts with inclined surface (18).