CN112017800B - Rod position measuring sensor pressure bearing shell and control rod hydraulic drive system - Google Patents

Rod position measuring sensor pressure bearing shell and control rod hydraulic drive system Download PDF

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Publication number
CN112017800B
CN112017800B CN202010763435.7A CN202010763435A CN112017800B CN 112017800 B CN112017800 B CN 112017800B CN 202010763435 A CN202010763435 A CN 202010763435A CN 112017800 B CN112017800 B CN 112017800B
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China
Prior art keywords
flange
measuring sensor
position measuring
rod position
rod
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CN202010763435.7A
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CN112017800A (en
Inventor
薄涵亮
王大中
张作义
刘潜峰
秦本科
王金海
赵陈儒
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Tsinghua University
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Tsinghua University
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
    • G21C7/12—Means for moving control elements to desired position
    • G21C7/16—Hydraulic or pneumatic drive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
    • 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

Abstract

The invention relates to the technical field of nuclear reactor engineering, and provides a rod position measuring sensor pressure bearing shell and a control rod hydraulic drive system, which comprise: the flange sleeve assembly is provided with a closed accommodating cavity; the rod position measuring sensor is arranged in the closed containing cavity and used for measuring the position of the control rod; and the lead interface piece is arranged on the flange sleeve component, is communicated with the closed container and is used for leading out a coil of the rod position measuring sensor. The rod position measuring sensor pressure bearing shell adopts the built-in rod position measuring sensor, the rod position measuring sensor is arranged in the closed containing cavity of the flange sleeve component, the coil of the rod position sensor is led out through the lead interface component, the position of a control rod driving mechanism can be detected without using an electric penetration piece, and the use reliability and stability of the rod position measuring sensor are improved.

Description

Rod position measuring sensor pressure bearing shell and control rod hydraulic drive system
Technical Field
The invention relates to the technical field of nuclear reactor engineering, in particular to a rod position measuring sensor pressure bearing shell and a control rod hydraulic drive system.
Background
Currently, in the nuclear reactor built-in control rod drive technology, a control rod drive mechanism is placed in a high temperature and high pressure environment within a reactor pressure vessel, and a rod position measurement sensor is used to measure the position of control rod movement. In the prior art, an electrical apparatus penetration piece is installed on a reactor pressure vessel, a coil lead of a rod position measuring sensor penetrates through the electrical penetration piece to transmit signals, and the existing electrical penetration piece has poor safety and stability in high-temperature and high-pressure environments, so that the stability and reliability of data detected by the rod position measuring sensor are directly influenced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the embodiment of the first aspect of the invention provides a pressure bearing shell of a rod position measuring sensor, which adopts a built-in rod position measuring sensor, the rod position measuring sensor is arranged in a closed containing cavity of a flange sleeve component, a coil of the rod position sensor is led out through a lead interface, the position of a control rod driving mechanism can be detected without using an electric penetration piece, and the reliability and the stability of the use of the rod position measuring sensor are improved.
Embodiments of the first aspect of the present invention provide a rod position measuring sensor pressure bearing shell, including: the flange sleeve assembly is provided with a closed accommodating cavity; the rod position measuring sensor is arranged in the closed containing cavity and used for measuring the position of a control rod; and the lead interface piece is arranged on the flange sleeve component, is communicated with the closed container and is used for leading out a coil of the rod position measuring sensor.
Embodiments of the first aspect of the present invention provide a rod position measuring sensor pressure housing comprising a flange-sleeve assembly, a rod position measuring sensor, and a lead interface member. Wherein, flange sleeve subassembly is equipped with airtight appearance chamber, through setting up stick position measurement sensor in airtight appearance intracavity to the high temperature of separation reactor, high pressure and radiation environment, and draw forth through the measurement coil with stick position measurement sensor through the lead wire interface piece, with the transmission that realizes measuring signal, cancelled and utilized electric penetration piece to carry out the mode of lead wire among the prior art scheme, effectively improved stick position measurement sensor detecting signal's stability and reliability.
According to one embodiment of the invention, the flange-sleeve assembly comprises: the first end face and the second end face of the flange are provided with sealing pieces; one end of the outer sleeve is connected with the second end face of the flange, and the other end of the outer sleeve extends in the direction far away from the flange; the inner sleeve is arranged in the outer sleeve, one end of the inner sleeve, which is close to the flange, is provided with a seal head, and the other end of the inner sleeve is provided with an opening, and the opening is used for a measuring rod of a control rod to pass through; the plugging piece is arranged at one end, far away from the flange, of the outer sleeve, and at least part of the plugging piece is plugged between the outer sleeve and the inner sleeve, so that the closed cavity is defined among the outer sleeve, the inner sleeve and the flange.
The flange-sleeve assembly includes a flange, an outer sleeve, an inner sleeve, and a closure. One end of the outer sleeve is connected with the second end face of the flange, and the other end of the outer sleeve extends in the direction far away from the flange; the inner sleeve is arranged in the outer sleeve, an accommodating space for installing the rod position measuring sensor is defined between the inner sleeve and the outer sleeve, a seal head is arranged at one end, close to the flange, of the inner sleeve to prevent high-temperature and high-pressure media from entering the accommodating space from the inner sleeve, an opening is formed in the other end of the inner sleeve, and the measuring rod of the control rod reciprocates in the inner sleeve through the opening, so that the rod position measuring sensor can measure position information of the control rod. The shutoff piece sets up the one end of keeping away from the flange at the outer sleeve, and at least partial shutoff is between outer sleeve and inner skleeve, the shutoff promptly between the internal face of outer sleeve and the outer wall of inner skleeve to realize sealed effect, prevent that high temperature high pressure medium from getting into accommodation space between outer sleeve and the inner skleeve, simultaneously, can prevent effectively again that stick position sensor from coming off in the accommodation space, improved stick position measuring transducer's stability and reliability.
The first end face of the flange is used for being connected with the combined valve structure, a sealing ring is arranged between the first end face of the flange and the combined valve structure, and the second end face of the flange is connected with a nozzle flange of the pressure container through a long fixing screw and sealed through the sealing ring.
In some embodiments, the flange is provided with a lead channel, one end of the lead channel is connected with the lead interface, and the other end of the lead channel extends along the radial direction of the flange to be communicated with the sealed cavity.
Through set up the lead wire passageway on the flange, the one end that the lead wire passes through holds the chamber intercommunication with airtight, and the other end is linked together with the outside of flange, with the one end fixed connection that lead wire interface spare and lead wire pass through, makes lead wire interface spare and airtight appearance chamber be linked together, stick position measuring transducer's measuring coil draws forth from lead wire interface spare through the lead wire passageway to realize the transmission of stick position signal, further improved stick position signal transmission's reliability.
It is worth mentioning that the distance between the flange and the reactor is far relative to the positions of the outer sleeve and the inner sleeve and the reactor, and by arranging the lead interface on the flange, when the coil of the rod position measuring sensor is led out from the lead interface, the coil is less influenced by the temperature and the pressure of the reactor, which is beneficial to further improving the accuracy of the rod position detection.
According to one embodiment of the invention, a pressure pipe is arranged at the top of the rod position measuring sensor, and the pressure pipe is connected with the flange and used for fixing a measuring coil of the rod position sensor; the top of the pressure pipe is provided with a locking nut, and the locking nut is fixedly connected with the flange; the top of the lock nut is provided with a sealing soldering lug, and the sealing soldering lug is welded with the first end face of the flange.
The top of stick position measurement sensor is equipped with presses the pipe, presses the pipe to play the effect of fixed stick position measurement sensor's coil, and the upper portion of pressing the pipe is fixed through locking female, and wherein, the flange fixed connection of locking female and flange sleeve subassembly, the top of locking female is equipped with sealed soldering lug, and sealed soldering lug is used for the first terminal surface seal welding with flange sleeve subassembly, plays sealed effect, helps further improving the stability and the reliability that stick position measurement sensor used.
In some embodiments, the flange, the outer sleeve, and the inner sleeve are disposed along a common axis.
Through setting up flange, outer sleeve and inner skleeve along same axis, then product overall structure is comparatively regular, helps improving the pleasing to the eye degree of product, and the stick position measuring sensor of being convenient for installs in airtight appearance intracavity, improves stick position measuring sensor's installation or dismantlement efficiency.
According to one embodiment of the invention, the flange is provided with a cylinder inlet water pipe, a cylinder inlet flow passage and a zero return flow passage, the cylinder inlet water pipe is communicated with the cylinder inlet flow passage, the cylinder inlet water pipe is used for being connected with a water pipe assembly of the spring box, the zero return flow passage is used for being communicated with a zero return flow hole of the combination valve structure, and the cylinder inlet flow passage is used for being communicated with a water inlet flow hole of the combination valve structure.
The flange is provided with a cylinder inlet water pipe, a cylinder inlet flow passage and a zero return flow passage, wherein the cylinder inlet flow passage is communicated with a water inlet flow hole of the combined valve structure, the zero return flow passage is communicated with the zero return flow passage of the combined valve structure, the cylinder inlet water pipe is communicated with the cylinder inlet flow passage, and the cylinder inlet water pipe is used for guiding water to a water pipe assembly of the spring box so as to realize water supply to the control rod driving mechanism.
According to one embodiment of the invention, one end of the zero returning flow passage, which is used for being communicated with the zero returning flow hole of the combined valve structure, is provided with a first sealing ring; and a second sealing ring is arranged at one end of the cylinder inlet flow passage, which is communicated with the water inlet flow hole of the combined valve structure.
The first sealing ring is arranged between the return-to-zero flow channel and the return-to-zero flow hole of the combined valve structure, the second sealing ring is arranged between the water inlet flow channel and the water inlet flow hole of the combined valve structure, the first sealing ring and the second sealing ring play a sealing role, water flow is prevented from flowing out from the return-to-zero flow channel to the return-to-zero flow hole of the combined valve structure or the water inlet flow channel to the water inlet flow hole of the combined valve structure, and therefore the stability and the safety of product use are improved. Wherein, first sealing washer and second sealing washer are C type sealing washer.
According to one embodiment of the invention, the number of the cylinder inlet flow passages is multiple, and the multiple cylinder inlet flow passages are arranged at intervals along the circumferential direction of the flange.
The number of cylinder inlet runners is increased, the flow of cylinder inlet water flow is improved, the plurality of cylinder inlet runners are arranged at intervals along the circumferential direction of the flange, the water supply efficiency of the driving mechanism is improved, and the attractiveness of products is improved.
The number of the cylinder inlet runners and the number of the zero returning runners are the same as those of the cylinder inlet runners and the zero returning runners of the combined valve structure, and the cylinder inlet runners and the zero returning runners are in one-to-one correspondence.
In some embodiments, the flange is provided with a first threaded hole and a hoisting stud, the first threaded hole penetrates through the first end face and the second end face of the flange, and the hoisting stud is in threaded connection with the first threaded hole; the flange is provided with a step hole and a mounting screw, the step hole penetrates through the first end face and the second end face of the flange, and the mounting screw is in threaded connection with the step hole and is used for being connected with a nozzle flange of the pressure vessel; the flange is provided with a thread through hole which penetrates through the first end face and the second end face of the flange and is used for allowing a screw of the combined valve structure to penetrate through so as to be connected with a nozzle flange of the pressure container.
The flange is provided with a first threaded hole and a hoisting stud, the hoisting stud is in threaded connection with the first threaded hole, is provided with a nut and is anti-loose in spot welding, and is used for being in sliding connection with the spring box component so as to facilitate hoisting of a product. The number of the first threaded holes is three, and the three hoisting studs respectively penetrate through the three first threaded holes and are in sliding connection with the spring box component, so that the rod position measuring assembly is hoisted.
The flange is provided with a step hole and a mounting screw, wherein the mounting screw is matched with the step hole, and the mounting screw is fixedly connected with the nozzle flange of the pressure container through the step hole, so that the reliability of product mounting is improved.
The flange is equipped with the screw thread through hole, and the screw thread through hole includes 6 through-holes and 2 screw thread through-holes, 8 long set screws of combination valve structure pass 6 through-holes and 2 screw thread through-holes in order to realize with pressure vessel's the fixed connection of mouthpiece flange, simultaneously, also can consolidate the joint strength of flange sleeve subassembly and pressure vent mouthpiece flange. Wherein, 2 screw through-holes are the hoist and mount hole site for flange sleeve subassembly's integral hoisting. In some embodiments, the closed volume is pi-shaped.
An embodiment of a second aspect of the present invention provides a control rod hydraulic drive system comprising: a control rod including a measuring rod; and the rod position measuring sensor pressure shell according to any one of the embodiments of the first aspect, wherein the rod position sensor of the rod position measuring sensor pressure shell is in electromagnetic induction connection with the measuring rod.
The control rod hydraulic drive system provided by the embodiment of the second aspect of the present invention includes the rod position measuring sensor pressure shell according to any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments described above are achieved, and further description is omitted here.
According to the rod position measuring sensor pressure bearing shell provided by the embodiment of the first aspect of the invention, the built-in rod position measuring sensor is adopted, the rod position measuring sensor is arranged in the closed containing cavity of the flange sleeve component, and the coil of the rod position sensor is led out through the lead interface component, so that the position of a control rod driving mechanism can be detected without using an electric penetration piece, and the reliability and the stability of the use of the rod position measuring sensor are improved.
Drawings
Fig. 1 is a schematic structural diagram of a pressure-bearing shell of a rod position measuring sensor according to an embodiment of the present invention;
FIG. 2 is an exploded view of a pressure-bearing shell of a rod position measuring sensor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a pressure-bearing shell of a rod position measuring sensor according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another view angle of the pressure-bearing shell of the rod position measuring sensor according to an embodiment of the present invention;
FIG. 5 is a schematic diagram in partial cross-section of a control rod hydraulic drive system according to an embodiment of the present invention;
fig. 6 is an enlarged schematic view of a portion a in fig. 5.
The reference numbers illustrate:
1. the rod position measuring sensor bears the pressure shell; 10. a flange sleeve assembly; 101. sealing the cavity; 102. a flange; 1021. a wire passage; 1022. pressing a pipe; 1023. locking a nut; 1024. sealing the soldering lug; 1025. a cylinder inlet flow passage; 1026. a cylinder inlet water pipe; 1027. a return-to-zero flow channel; 1028. a threaded through hole; 1029. a stepped bore; 103. an inner sleeve; 104. an outer sleeve; 105. a blocking member; 20. a rod position measuring sensor; 30. a lead interface member; 40. hoisting the stud; 50. a nut; 60. mounting screws; 70. a first seal ring; 80. a set screw; 90. a pressure vessel nozzle flange; 2. a control rod hydraulic drive system; 21. a combination valve structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, an embodiment of the first aspect of the present invention provides a rod position measuring sensor pressure-bearing shell 1, including: a flange sleeve assembly 10, a rod position measuring sensor 20, and a lead interface 30.
Wherein, the flange sleeve component 10 is provided with a closed cavity 101; the rod position measuring sensor 20 is arranged in the closed containing cavity 101 and used for measuring the position of a control rod; the lead interface 30 is disposed on the flange-sleeve assembly 10 and is in communication with the closed volume for extracting the coil of the rod position measuring sensor 20.
According to the rod position measuring sensor pressure-bearing shell 1 provided by the embodiment of the first aspect of the invention, the rod position measuring sensor 20 is arranged in the closed accommodating cavity 101 to block the high-temperature, high-pressure and radiation environments of a reactor, and the measuring coil of the rod position measuring sensor 20 is led out through the lead interface piece 30 to realize the transmission of the measuring signal, so that the mode of leading by using an electric penetration piece in the prior art is eliminated, the structure of the product is simplified, and the stability and reliability of the signal detected by the rod position measuring sensor 20 are effectively improved.
As shown in fig. 2, according to one embodiment of the present invention, a flange-sleeve assembly 10 includes: a flange 102, wherein a first end surface of the flange 102 is provided with a sealing element; one end of the outer sleeve 104 is connected with the second end face of the flange 102, and the other end of the outer sleeve 104 extends in the direction away from the flange 102; the inner sleeve 103 is arranged in the outer sleeve 104, one end of the inner sleeve 103 close to the flange 102 is provided with a seal head, and the other end of the inner sleeve 103 is provided with an opening for a measuring rod of a control rod to pass through; a blocking piece 105, the blocking piece 105 is arranged at one end of the outer sleeve 104 far away from the flange 102, and at least part of the blocking piece 105 is blocked between the outer sleeve 104 and the inner sleeve 103, so that a closed cavity 101 is defined between the outer sleeve 104, the inner sleeve 103 and the flange 102.
The flange-sleeve assembly 10 comprises a flange 102, an outer sleeve 104, an inner sleeve 103 and a closure 105. Wherein, one end of the outer sleeve 104 is connected with the second end face of the flange 102, and the other end extends in the direction far away from the flange 102; the inner sleeve 103 is disposed in the outer sleeve 104 and defines a receiving space for mounting the rod position measuring sensor 20 with the outer sleeve 104, and one end of the inner sleeve 103 near the flange 102 is provided with a seal to prevent high temperature and high pressure medium from entering the receiving space from the inner sleeve 103, and the other end is provided with an opening through which the measuring rod of the control rod reciprocates in the inner sleeve 103, thereby enabling the rod position measuring sensor 20 to measure position information of the control rod. The blocking piece 105 is arranged at one end, far away from the flange 102, of the outer sleeve 104, and at least partially blocks between the outer sleeve 104 and the inner sleeve 103, namely, blocks between the inner wall surface of the outer sleeve 104 and the outer wall surface of the inner sleeve 103, so that a sealing effect is achieved, high-temperature and high-pressure media are prevented from entering the accommodating space from the space between the outer sleeve 104 and the inner sleeve 103, meanwhile, the rod position sensor can be effectively prevented from falling off from the accommodating space, and the stability and the reliability of the rod position measuring sensor 20 are improved.
The first end face of the flange 102 is used for being connected with a combined valve structure, a sealing ring is arranged between the first end face of the flange 102 and the combined valve structure, and the second end face of the flange 102 is connected with a nozzle flange of a pressure container through long fixing screws and short fixing screws and sealed through the sealing ring.
As shown in fig. 1 and 2, in some embodiments, the flange 102 is provided with a lead passage 1021, and one end of the lead passage 1021 is connected to the lead interface member 30, and the other end extends in a radial direction of the flange 102 to communicate with the sealed cavity 101.
Through setting up lead wire passageway 1021 on flange 102, the one end that the lead wire passes through is linked together with airtight appearance chamber 101, and the other end is linked together with the outside of flange 102, makes lead wire interface member 30 and airtight appearance chamber 101 be linked together, and the measurement coil of stick position measurement sensor 20 draws out from lead wire interface member 30 through lead wire passageway 1021 to realize the transmission of stick position signal, further improved the reliability of stick position signal transmission.
It should be noted that the distance between the flange 102 and the reactor is relatively long compared with the positions of the outer sleeve 104 and the inner sleeve 103 and the reactor, and by disposing the lead interface 30 on the flange 102, the coil of the rod position measuring sensor 20 is less affected by the temperature and pressure of the reactor when being led out from the lead interface 30, which contributes to further improving the accuracy of the rod position detection.
As shown in FIG. 2, in some embodiments, a pressure tube 1022 is provided on the top of the rod position measuring sensor 20, and the pressure tube 1022 is connected to the flange 102 for securing the measuring coil of the rod position sensor; the top of the pressing pipe 1022 is provided with a locking nut 1023, and the locking nut 1023 is fixedly connected with the flange 102; the top of the lock nut 1023 is provided with a sealing welding piece 1024, and the sealing welding piece 1024 is welded with the first end face of the flange 102.
The top of stick position measurement sensor 20 is equipped with presses pipe 1022, press pipe 1022 to play the effect of fixed stick position measurement sensor 20's coil, the upper portion of pressing pipe 1022 is fixed through locking nut 1023, wherein, locking nut 1023 and flange 102 fixed connection of flange sleeve subassembly 10, the top of locking nut 1023 is equipped with sealed soldering lug 1024, sealed soldering lug 1024 is used for the first terminal surface sealing weld with flange sleeve subassembly 10, play the sealing effect, help further improving the stability and the reliability that stick position measurement sensor 20 used.
As shown in fig. 1 and 2, in some embodiments, the flange 102, the outer sleeve 104, and the inner sleeve 103 are disposed along the same axis.
By arranging the flange 102, the outer sleeve 104 and the inner sleeve 103 along the same axis, the overall structure of the product is more regular, which is beneficial to improving the aesthetic degree of the product, and the rod position measuring sensor 20 is convenient to be installed in the closed cavity 101, so that the installation or disassembly efficiency of the rod position measuring sensor 20 is improved.
As shown in fig. 2 to 4, according to an embodiment of the present invention, the flange 102 is provided with a cylinder inlet pipe 1026, a cylinder inlet passage 1025, and a zero return passage 1027, the cylinder inlet pipe 1026 is communicated with the cylinder inlet passage 1025, the cylinder inlet pipe 1026 is used for being connected with the water pipe assembly of the spring box, the zero return passage 1027 is used for being communicated with the zero return flow hole of the combination valve structure 21, and the cylinder inlet passage 1025 is used for being communicated with the water inlet flow hole of the combination valve structure 21.
A cylinder inlet water pipe 1026, a cylinder inlet flow passage 1025 and a zero return flow passage 1027 are arranged on the flange 102, wherein the cylinder inlet flow passage 1025 is communicated with a water inlet hole of the combination valve structure 21, the zero return flow passage 1027 is communicated with the zero return flow passage 1027 of the combination valve structure 21, the cylinder inlet water pipe 1026 is communicated with the cylinder inlet flow passage 1025, and the cylinder inlet water pipe 1026 is used for guiding water to a water pipe assembly of a spring box so as to realize water supply to the control rod driving mechanism.
As shown in fig. 2, the zeroing flow passage 1027 is provided with a first sealing ring 70 at one end communicating with the zeroing flow hole of the combination valve structure 21 according to an embodiment of the present invention.
According to one embodiment of the present invention, the cylinder inlet channel 1025 has a second gasket (not shown) at its end for communicating with the inlet flow hole of the combination valve structure 21.
By arranging the first sealing ring 70 between the return-to-zero flow passage 1027 and the return-to-zero flow hole of the combination valve, and arranging the second sealing ring between the water inlet flow passage and the water inlet flow hole of the combination valve structure 21, the first sealing ring 70 and the second sealing ring play a role in sealing, so that water flow is prevented from flowing out from between the return-to-zero flow passage 1027 and the return-to-zero flow hole of the combination valve structure 21 or between the water inlet flow passage and the water inlet flow hole of the combination valve structure 21, and the stability and the safety of product use are further improved. Wherein the first seal ring 70 and the second seal ring are C-shaped seal rings.
As shown in fig. 3 and 4, according to an embodiment of the present invention, the number of the cylinder inlet channel 1025 is plural, and the plural cylinder inlet channels 1025 are arranged at intervals along the circumferential direction of the flange 102.
The number of the cylinder inlet flow channels 1025 is increased, the flow of water flow of the cylinder inlet is improved, the plurality of cylinder inlet flow channels 1025 are arranged at intervals along the circumferential direction of the flange 102, the water supply efficiency of the driving mechanism is improved, and the attractiveness of products is improved.
The number of the cylinder inlet flow passages 1025 and the number of the zero returning flow passages 1027 are the same as those of the cylinder inlet flow passages 1025 and the number of the zero returning flow passages 1027 of the combined valve structure 21, and the cylinder inlet flow passages 1025 and the zero returning flow passages 1027 are in one-to-one correspondence.
As shown in fig. 2 and 6, in some embodiments, the flange 102 is provided with a first threaded hole and a lifting stud 40, the lifting stud 40 being threadedly connected to the first threaded hole.
The flange 102 is provided with a first threaded hole and a hoisting stud 40, the first threaded hole is a threaded blind hole, the hoisting stud 40 is in threaded connection with the first threaded hole, and is provided with a nut 50 and is anti-loose through spot welding, so that the hoisting stud is in sliding connection with the spring box component, and the spring box product can be assembled and hoisted conveniently. The number of the first threaded holes is three, and the three hoisting studs are respectively connected with the three first threaded holes and are in sliding connection with the spring box component, so that the spring box is assembled and hoisted. As shown in fig. 2 and 6, in some embodiments, the flange 102 is provided with a stepped hole 1029 and mounting screws 60, the stepped hole 1029 penetrates through a first end face and a second end face of the flange 102, and the mounting screws 60 are flange-connected with a nozzle of a pressure vessel through the stepped hole 1029.
The flange 102 is provided with a stepped hole 1029 and a mounting screw 60, wherein the stepped hole 1029 is a screw stepped hole, the mounting screw is matched with the stepped hole, and the mounting screw is fixedly connected with a nozzle flange of the pressure container through the stepped hole 1029, so that the reliability of product mounting is improved.
As shown in fig. 2 and 6, in some embodiments, the flange 102 is provided with a threaded through hole 1028, and the threaded through hole 1028 penetrates the first end face and the second end face of the flange 102 for passing a screw of the combination valve structure 21 therethrough to be flange-connected with the nozzle of the pressure vessel.
The flange 102 is provided with a thread through hole 1028 including 6 through holes and 2 thread through holes, and 8 fixing screws 80 of the combined valve structure 21 pass through the 6 through holes and the 2 thread through holes to realize the fixed connection with the pressure vessel nozzle flange 90, and meanwhile, the connection strength of the flange sleeve assembly 10 and the pressure vessel nozzle flange 90 can also be reinforced. Wherein, 2 screw through-holes are the hoist and mount hole site for flange sleeve subassembly 10's integral hoisting.
In some embodiments, enclosed volume 101 is pi-shaped.
As shown in fig. 5, an embodiment of a second aspect of the present invention provides a control rod hydraulic drive system 2, including: a control rod including a measuring rod; and a rod position measuring sensor pressure-bearing shell 1 as in any one of the embodiments of the first aspect, the rod position sensor of the rod position measuring sensor pressure-bearing shell 1 being in electromagnetic induction connection with the measuring rod.
The control rod hydraulic drive system 2 provided by the embodiment of the second aspect of the present invention includes the rod position measuring sensor pressure shell 1 of any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments described above are achieved, and further description is omitted here.
According to the rod position measuring sensor pressure bearing shell provided by the embodiment of the first aspect of the invention, the built-in rod position measuring sensor is adopted, the rod position measuring sensor is arranged in the closed containing cavity of the flange sleeve component, and the coil of the rod position sensor is led out through the lead interface component, so that the position of a control rod driving mechanism can be detected without using an electric penetration piece, and the reliability and the stability of the use of the rod position measuring sensor are improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A rod position measuring sensor pressure-bearing shell is characterized by comprising:
the flange sleeve assembly is provided with a closed accommodating cavity;
the rod position measuring sensor is arranged in the closed containing cavity and used for measuring the position of a control rod;
and the lead interface piece is arranged on the flange sleeve component, is communicated with the closed cavity and is used for leading out a coil of the rod position measuring sensor.
2. The rod position measuring sensor pressure shell of claim 1, wherein the flange-sleeve assembly comprises:
the first end face and the second end face of the flange are provided with sealing pieces;
one end of the outer sleeve is connected with the second end face of the flange, and the other end of the outer sleeve extends in the direction far away from the flange;
the inner sleeve is arranged in the outer sleeve, one end, close to the flange, of the inner sleeve is provided with a seal head, and the other end of the inner sleeve is provided with an opening, and the opening is used for a measuring rod of a control rod to pass through;
the plugging piece is arranged at one end, far away from the flange, of the outer sleeve, and at least part of the plugging piece is plugged between the outer sleeve and the inner sleeve, so that the closed cavity is defined among the outer sleeve, the inner sleeve and the flange.
3. The rod position measuring sensor pressure shell of claim 2,
the flange is provided with a lead channel, one end of the lead channel is connected with the lead interface element, and the other end of the lead channel extends to be communicated with the closed cavity along the radial direction of the flange.
4. The rod position measuring sensor pressure shell according to claim 2 or 3,
the top of the rod position measuring sensor is provided with a pressure pipe, and the pressure pipe is connected with the flange and used for fixing a measuring coil of the rod position measuring sensor;
the top of the pressure pipe is provided with a locking nut, and the locking nut is fixedly connected with the flange;
the top of the lock nut is provided with a sealing soldering lug, and the sealing soldering lug is welded with the first end face of the flange.
5. The rod position measuring sensor pressure shell according to claim 2 or 3,
the flange, the outer sleeve and the inner sleeve are arranged along the same axis.
6. The rod position measuring sensor pressure shell according to claim 2 or 3,
the flange is equipped with into jar water pipe, advances jar runner and return to zero runner, advance the jar water pipe with advance the jar runner and be linked together, advance the jar water pipe and be used for linking to each other with the water pipe assembly of spring box, return to zero runner and be used for returning to zero discharge orifice with the combination valve structure and be linked together, advance the jar runner and be used for being linked together with the inflow discharge orifice of combination valve structure.
7. The rod position measuring sensor pressure shell of claim 6,
a first sealing ring is arranged at one end of the zero returning flow passage, which is communicated with the zero returning flow hole of the combined valve structure; and a second sealing ring is arranged at one end of the cylinder inlet flow passage, which is communicated with the water inlet flow hole of the combined valve structure.
8. The rod position measuring sensor pressure shell of claim 6,
the number of the cylinder inlet runners is multiple, and the cylinder inlet runners are arranged at intervals along the circumferential direction of the flange.
9. The rod position measuring sensor pressure shell according to claim 2 or 3,
the flange is provided with a first threaded hole and a hoisting stud, the first threaded hole penetrates through the first end face and the second end face of the flange, and the hoisting stud is in threaded connection with the first threaded hole;
the flange is provided with a step hole and a mounting screw, the step hole penetrates through the first end face and the second end face of the flange, and the mounting screw penetrates through the step hole and is used for being connected with a nozzle flange of the pressure container; the flange is provided with a thread through hole which penetrates through the first end face and the second end face of the flange and is used for a fixing screw of the combined valve structure to penetrate through so as to be connected with a nozzle flange of the pressure container.
10. A control rod hydraulic drive system, comprising:
a control rod including a measuring rod; and
the rod position measuring sensor pressure shell of any one of claims 1 to 9, the rod position sensor of the rod position measuring sensor pressure shell being in electromagnetic induction connection with the measuring rod.
CN202010763435.7A 2020-07-31 2020-07-31 Rod position measuring sensor pressure bearing shell and control rod hydraulic drive system Active CN112017800B (en)

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Publication number Priority date Publication date Assignee Title
CH468695A (en) * 1967-06-07 1969-02-15 Gulf General Atomic Inc Nuclear reactor
CN101794627A (en) * 2010-03-12 2010-08-04 清华大学 Rod position measuring device based on differential pressure variation
CN102483962A (en) * 2009-06-10 2012-05-30 巴布科克和威尔科克斯核作业集团股份有限公司 Control rod drive mechanism for nuclear reactor
KR101616004B1 (en) * 2014-11-27 2016-04-27 주식회사 우진 Apparatus and Method for Confirming Position of Control Rod in Nuclear Reactor

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Publication number Priority date Publication date Assignee Title
US9407131B2 (en) * 2012-04-17 2016-08-02 Bwxt Nuclear Operations Group, Inc. Positional encoder and control rod position indicator for nuclear reactor using same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH468695A (en) * 1967-06-07 1969-02-15 Gulf General Atomic Inc Nuclear reactor
CN102483962A (en) * 2009-06-10 2012-05-30 巴布科克和威尔科克斯核作业集团股份有限公司 Control rod drive mechanism for nuclear reactor
CN101794627A (en) * 2010-03-12 2010-08-04 清华大学 Rod position measuring device based on differential pressure variation
KR101616004B1 (en) * 2014-11-27 2016-04-27 주식회사 우진 Apparatus and Method for Confirming Position of Control Rod in Nuclear Reactor

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