CN114382829A - Instrument guide assembly compresses tightly damping mechanism - Google Patents
Instrument guide assembly compresses tightly damping mechanism Download PDFInfo
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- CN114382829A CN114382829A CN202210021949.4A CN202210021949A CN114382829A CN 114382829 A CN114382829 A CN 114382829A CN 202210021949 A CN202210021949 A CN 202210021949A CN 114382829 A CN114382829 A CN 114382829A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
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- 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
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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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- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention relates to an instrument guide assembly compaction vibration reduction mechanism and a reactor, wherein the mechanism comprises an upper reactor internals supporting column and also comprises: the inner part of the sliding guide rod is of a hollow structure along the axial direction, the upper part in-pile component supporting column is provided with a first guide hole along the axial direction, the sliding guide rod is arranged in the first guide hole in the upper part in-pile component supporting column and can move along the axial direction, and the elastic piece is sleeved on the sliding guide rod. The above-mentioned scheme that this application provided, reactor core instrument guide assembly is located on upper portion internals support column, whole subassembly and upper portion internals realize accurate centering location, when sleeve on the reactor core instrument guide assembly inserts slip guide bar head guide section downwards, promote the slip guide bar lapse, reaction force through the elastic component upwards compresses tightly the sleeve, restraint fixed sleeve lower extreme, thereby reduce the reactor core measuring instrument subassembly of the interior passageway of sleeve and avoid rivers to influence and produce latent vibration.
Description
Technical Field
The invention relates to the technical field of a pressurized water reactor measuring connection pipe sealing assembly, in particular to a pressing vibration reduction mechanism of an instrument guide assembly.
Background
As shown in fig. 3, a conventional core instrumentation channel is introduced from a pressure vessel head 111 to a core measurement point position through a core instrumentation guide assembly 114, and the channel starts from a pressure vessel reactor nozzle 112, passes through a reactor nozzle seal assembly 113, the core instrumentation guide assembly 114, and an upper internals support column 115, and reaches the top of a fuel assembly 116. Due to the distance from the pressure vessel head 111 to the core fuel assemblies 116 and the different distribution positions of the fuel assemblies 116, the core instrumentation cannot be correctly introduced into the designated position of the core fuel assembly without the instrumentation guide assembly. During the first installation of the core instrument and the replacement of the core instrument (the extraction of an old instrument and the insertion of a new instrument), the channel provides guidance for the core measuring instrument assembly, and ensures that the core measuring instrument can be inserted into the position of a specified measuring point of the core and can be successfully extracted along the guide channel when the instrument is extracted.
Under each operating condition, the top cover cavity is affected by the fluid coolant, and if the reactor core instrument has no protection device, the reactor core instrument is impacted by the fluid, so that the risk that the reactor core instrument is damaged and cannot work is increased. The instrument guide channel provides protection for the reactor core measuring instrument, and potential vibration generated by the reactor core measuring instrument assembly under the influence of water flow is greatly reduced.
At present, as shown in fig. 4, in the conventional core instrumentation guide assembly, a main bottom plate 1141, an instrumentation guide tube support rod 1143 and an instrumentation guide tube fixing seat 1144 are welded to form a main body support structure, and a fixed instrumentation guide tube 1145 and a telescopic double-layer sleeve 1142 are installed to form an integral core instrumentation guide assembly structure. The instrumentation guide assembly 114 is integrally mounted on the upper support plate of the upper internals and movably connected to the upper internals, and the instrumentation guide assembly can be integrally lifted or inserted into the upper internals.
Referring to fig. 5, the retractable double-layer sleeve 1142 mainly comprises a first sleeve 11421, a second sleeve 11422, a spring 11423, an inner sleeve 11424 and an outer sleeve 11425, wherein the inner sleeve 11424 is fixed on the bottom plate 1141 by a fastening member in a pressing connection, an inner hole of the inner sleeve is butted with an outlet of an instrument conduit to form an instrument continuous channel, the outer sleeve 11425 is axially slidable relative to the inner sleeve 11424, when the instrument is in a low position, the double-layer sleeve is nested and contracted to be stored in an upper inner-pile member supporting column, the outer sleeve 11425 is pressed downwards by the mounted spring 11423, the lower end of the outer sleeve 11425 is fixed with the supporting column, and the vibration of the outer sleeve during operation is absorbed; when the instrument is pulled to the high position, the inner sleeve 11424 is lifted upwards along with the integral grid, the outer sleeve 11425 slides downwards relative to the inner sleeve 11424, the reactor core instrument is always in a full-range guiding and protecting state, and the outer sleeve 11425 is not separated from the upper support column all the time in the process. When the instrument falls back to the reactor core, the double-layer sleeve extends and retracts into the supporting column again for storage.
The compression damping structure of the retractable double-layered sleeve 1142 mainly comprises a first sleeve 11421 fixed to the bottom plate 1141 and a second sleeve 11422 slidable relative to the first sleeve 11421, and the first sleeve 11421 and the second sleeve 11422 are both mounted outside the inner sleeve 11424 and are coaxial with the inner sleeve 11424. The spring 11423 is sleeved on the inner sleeve 11424, and one end of the spring 11423 abuts against the first sleeve 11421 and the other end abuts against the second sleeve 11422. When the meter is in the low position, the telescoping double sleeve 1142 retracts into the support post, the spring 11423 compresses, compressing the second sleeve 11422 downward, the second sleeve 11422 engages the outer sleeve 11425, thereby transferring the spring compression force to the outer sleeve 11425 to compress the outer sleeve.
The telescopic double-layer sleeve 1142 realizes a pressing function through sliding fit among four relatively movable components, namely the first sleeve 11421, the second sleeve 11422, the inner sleeve 11424 and the outer sleeve 11425, and has a complex structure, a large number of relatively slidable components, increased interference risks in an operation process and complex manufacturing and processing. Meanwhile, the telescopic double-layer sleeve can only realize the compression vibration reduction of the outer sleeve, the lower end of the inner sleeve is a free end, the vibration reduction function is avoided, the lower end of the telescopic double-layer sleeve is located near the reactor core outlet, the flow-induced vibration is severe, and the protection effect on the reactor core instrument can be weakened when the lower end of the inner sleeve without vibration reduction constraint vibrates.
Disclosure of Invention
Therefore, it is necessary to provide a compression damping mechanism for an instrument guide assembly and a reactor, aiming at the problems of complex overall structure and poor damping effect of the compression damping mechanism in the existing reactor core instrument guide assembly.
The invention provides a pressing and vibration damping mechanism of an instrument guide assembly, which comprises an upper in-pile component supporting column and further comprises: the upper part of the inner pile member supporting column is provided with a first guide hole along the axial direction, the sliding guide rod is arranged in the first guide hole on the upper part of the inner pile member supporting column, the sliding guide rod can move along the axial direction, the elastic piece is sleeved on the sliding guide rod, the upper end of the elastic piece is abutted against the sliding guide rod, and the lower end of the elastic piece is abutted against the upper part of the inner pile member supporting column.
The instrument guide assembly compresses the vibration reduction mechanism, the reactor core instrument guide assembly is located on the upper reactor internals support column, the whole assembly and the upper reactor internals realize accurate centering and positioning, and meanwhile, the whole assembly can move up and down along the axis relative to the upper reactor internals. When the sleeve on the reactor core instrument guide assembly is inserted into the head guide section of the sliding guide rod downwards, the sliding guide rod is pushed to slide downwards, the sleeve is upwards pressed through the reaction force of the elastic part, and the lower end of the fixed sleeve is restrained, so that the reactor core instrument assembly of the channel in the sleeve is prevented from generating potential vibration due to the influence of water flow. The whole vibration damping mechanism is compact in design, few in relative movable parts, low in card-related risk, good in reliability, simple in manufacturing and installing process, easy to implement and low in manufacturing cost.
In one embodiment, the first guide hole comprises a first through hole and a second through hole which are coaxially communicated, the diameter of the first through hole corresponds to the diameter of a sleeve on the reactor core instrument guide assembly, the first through hole is positioned above the second through hole, and the diameter of the first through hole is smaller than that of the second through hole; the sliding guide rod can move in the second through hole along the axial direction.
In one embodiment, a limiting block is arranged at the upper end of the sliding guide rod, the size of the limiting block is matched with the inner diameter of the second through hole, the diameter of the limiting block is larger than the inner diameter of the first through hole, a third through hole is formed in the limiting block along the axial direction of the sliding guide rod, the third through hole is communicated with the inside of the sliding guide rod, and the upper end of the elastic part is abutted to the limiting block.
In one embodiment, the third through hole has an inverted triangular structure, and the structure of the third through hole corresponds to the structure of the lower end of the sleeve.
In one embodiment, the sliding guide rod further comprises an end plug, the end plug is arranged in the upper internals support column, one end of the end plug, facing the second through hole, is provided with a limiting protrusion, the limiting protrusion is located in the second through hole, the lower end of the elastic piece abuts against the limiting protrusion, the end plug is provided with a second guide hole along the axial direction of the sliding guide rod, and the lower end of the sliding guide rod passes through the limiting protrusion and then is located in the second guide hole.
In one embodiment, the second guide hole includes a fourth through hole and a fifth through hole which are coaxially communicated, an inner diameter of the fourth through hole is larger than an inner diameter of the fifth through hole, the fourth through hole is located above the fifth through hole, a lower end of the sliding guide rod is located in the fourth through hole, and a diameter of the lower end of the sliding guide rod is larger than the inner diameter of the fifth through hole.
In one embodiment, the sliding guide rod is in clearance fit with the fourth through hole.
In one embodiment, the first through hole is in clearance fit with a sleeve on the core instrument guide assembly.
In one embodiment, the elastic member includes a compression spring, and the compression spring is sleeved on the sliding guide rod.
The invention also provides a reactor which is characterized by comprising a reactor body and the instrument guide assembly pressing and vibration damping mechanism as described in any one of the embodiment of the application, wherein the instrument guide assembly pressing and vibration damping mechanism is arranged on the reactor body.
Drawings
Fig. 1 is a schematic structural diagram of a meter guide assembly compression damping mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a guide assembly of the core instrument according to an embodiment of the present invention;
FIG. 3 is a schematic view of a prior art core instrumentation channel;
FIG. 4 is a schematic view of the instrument guide assembly of FIG. 3;
fig. 5 is a schematic view of the telescoping two-layer sleeve of fig. 4.
The figures are labeled as follows:
10. an upper internals support column; 101. a first through hole; 102. a second through hole; 20. a sliding guide bar; 201. a limiting block; 30. an elastic member; 40. an end plug; 401. a limiting bulge; 402. a fourth via hole; 403. a fifth through hole; 11. a base plate; 12. a sleeve; 13. an instrument conduit fixing seat; 14. an instrument guide support rod; 15. an instrumentation guide.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "horizontal", "inner", "axial", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, 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 an intermediate. 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.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "horizontal," "upper," "lower," and the like are for illustrative purposes only and do not represent the only embodiments.
As shown in fig. 3, a conventional core instrumentation channel is introduced from a pressure vessel head 111 to a core measurement point position through a core instrumentation guide assembly 114, and the channel starts from a pressure vessel reactor nozzle 112, passes through a reactor nozzle seal assembly 113, the core instrumentation guide assembly 114, and an upper internals support column 115, and reaches the top of a fuel assembly 116. Due to the distance from the pressure vessel head 111 to the core fuel assemblies 116 and the different distribution positions of the fuel assemblies 116, the core instrumentation cannot be correctly introduced into the designated position of the core fuel assembly without the instrumentation guide assembly. During the first installation of the core instrument and the replacement of the core instrument (the extraction of an old instrument and the insertion of a new instrument), the channel provides guidance for the core measuring instrument assembly, and ensures that the core measuring instrument can be inserted into the position of a specified measuring point of the core and can be successfully extracted along the guide channel when the instrument is extracted. Under each operating condition, the top cover cavity is affected by the fluid coolant, and if the reactor core instrument has no protection device, the reactor core instrument is impacted by the fluid, so that the risk that the reactor core instrument is damaged and cannot work is increased. The instrument guide channel provides protection for the reactor core measuring instrument, and potential vibration generated by the reactor core measuring instrument assembly under the influence of water flow is greatly reduced. At present, as shown in fig. 4, in the conventional core instrumentation guide assembly, a main bottom plate 1141, an instrumentation guide tube support rod 1143 and an instrumentation guide tube fixing seat 1144 are welded to form a main body support structure, and a fixed instrumentation guide tube 1145 and a telescopic double-layer sleeve 1142 are installed to form an integral core instrumentation guide assembly structure. The instrumentation guide assembly 114 is integrally mounted on the upper support plate of the upper internals and movably connected to the upper internals, and the instrumentation guide assembly can be integrally lifted or inserted into the upper internals. Referring to fig. 5, the retractable double-layer sleeve 1142 mainly comprises a first sleeve 11421, a second sleeve 11422, a spring 11423, an inner sleeve 11424 and an outer sleeve 11425, wherein the inner sleeve 11424 is fixed on the bottom plate 1141 by a fastening member in a pressing connection, an inner hole of the inner sleeve is butted with an outlet of an instrument conduit to form an instrument continuous channel, the outer sleeve 11425 is axially slidable relative to the inner sleeve 11424, when the instrument is in a low position, the double-layer sleeve is nested and contracted to be stored in an upper inner-pile member supporting column, the outer sleeve 11425 is pressed downwards by the mounted spring 11423, the lower end of the outer sleeve 11425 is fixed with the supporting column, and the vibration of the outer sleeve during operation is absorbed; when the instrument is pulled to the high position, the inner sleeve 11424 is lifted upwards along with the integral grid, the outer sleeve 11425 slides downwards relative to the inner sleeve 11424, the reactor core instrument is always in a full-range guiding and protecting state, and the outer sleeve 11425 is not separated from the upper support column all the time in the process. When the instrument falls back to the reactor core, the double-layer sleeve extends and retracts into the supporting column again for storage. The compression damping structure of the retractable double-layered sleeve 1142 mainly comprises a first sleeve 11421 fixed to the bottom plate 1141 and a second sleeve 11422 slidable relative to the first sleeve 11421, and the first sleeve 11421 and the second sleeve 11422 are both mounted outside the inner sleeve 11424 and are coaxial with the inner sleeve 11424. The spring 11423 is sleeved on the inner sleeve 11424, and one end of the spring 11423 abuts against the first sleeve 11421 and the other end abuts against the second sleeve 11422. When the meter is in the low position, the telescoping double sleeve 1142 retracts into the support post, the spring 11423 compresses, compressing the second sleeve 11422 downward, the second sleeve 11422 engages the outer sleeve 11425, thereby transferring the spring compression force to the outer sleeve 11425 to compress the outer sleeve. The telescopic double-layer sleeve 1142 realizes a pressing function through sliding fit among four relatively movable components, namely the first sleeve 11421, the second sleeve 11422, the inner sleeve 11424 and the outer sleeve 11425, and has a complex structure, a large number of relatively slidable components, increased interference risks in an operation process and complex manufacturing and processing. Meanwhile, the telescopic double-layer sleeve can only realize the compression vibration reduction of the outer sleeve, the lower end of the inner sleeve is a free end, the vibration reduction function is avoided, the lower end of the telescopic double-layer sleeve is located near the reactor core outlet, the flow-induced vibration is severe, and the protection effect on the reactor core instrument can be weakened when the lower end of the inner sleeve without vibration reduction constraint vibrates.
In order to solve the above problem, as shown in fig. 1, in an embodiment of the present invention, there is provided an instrument guide assembly pressing vibration reduction mechanism including an upper internals support column 10, further including: sliding guide 20 and elastic component 30, wherein, elastic component 30 can select compression spring, sliding guide 20's inside is hollow structure along the axial, upper portion internals support post 10 is provided with first guiding hole along the axial, sliding guide 20 sets up in the first guiding hole on upper portion internals support post 10, and sliding guide 20 can follow axial displacement, elastic component 30 cover is established on sliding guide 20, the upper end and the sliding guide 20 butt of elastic component 30, the lower extreme and upper portion internals support post 10 butt.
Specifically, as shown in fig. 2, the core instrument guide assembly in the present application includes a bottom plate 11, a sleeve 12, an instrument guide fixing 13, an instrument guide support 14, and an instrument guide 15, and since the core instrument guide assembly is a conventional art, the connection relationship of the components in the core instrument guide assembly will not be described again;
when the reactor core instrument guide assembly is used, the reactor core instrument guide assembly is located on the upper reactor internals supporting column, the whole assembly and the upper reactor internals realize accurate centering and positioning, and meanwhile, the reactor core instrument guide assembly can move up and down along the axis relative to the upper reactor internals. As shown in fig. 1, when the sleeve 12 of the instrument guide assembly is inserted downward into the head guide section of the slide guide rod 20, the slide guide rod 20 is pushed to slide downward, the sleeve 12 is pressed upward by the reaction force of the elastic member 30, and the lower end of the sleeve 12 is restrained, so that the potential vibration of the instrument measurement assembly of the channel in the sleeve 12, which is caused by the water flow, is reduced. The whole vibration damping mechanism is compact in design, few in relative movable parts, low in card-related risk, good in reliability, simple in manufacturing and installing process, easy to implement and low in manufacturing cost.
In some embodiments, as shown in fig. 1, the first guide hole in the present application includes a first through hole 101 and a second through hole 102 which are coaxially communicated, wherein the diameter of the first through hole 101 corresponds to the diameter of the sleeve 12 on the core instrument guide assembly, the first through hole 101 is located above the second through hole 102, and the diameter of the first through hole 101 is smaller than the diameter of the second through hole 102; the sliding guide 20 can move axially in the second through hole 102, and the sliding guide 20 is limited in the second through hole 102 and cannot be pulled out of the first through hole 101.
In some embodiments, as shown in fig. 1, the upper end of the sliding guide rod 20 in the present application is provided with a limiting block 201, the size of the limiting block 201 matches with the inner diameter of the second through hole 102, the diameter of the limiting block 201 is greater than the inner diameter of the first through hole 101, the limiting block 201 is provided with a third through hole along the axial direction of the sliding guide rod 20, the third through hole is communicated with the inside of the sliding guide rod 20, and the upper end of the elastic member 30 abuts against the limiting block 201.
Because the size of the limiting block 201 is matched with the inner diameter of the second through hole 102, and the diameter of the limiting block 201 is greater than the inner diameter of the first through hole 101, the limiting block 201 can only move in the second through hole 102, and meanwhile, because the limiting block 201 is located at the upper end of the sliding guide rod 20, therefore, the sliding guide rod 20 can only move in the second through hole 102, after the sleeve 12 on the reactor core instrument guide assembly downwards passes through the first through hole 101 and enters the second through hole 102, the lower end of the sleeve 12 can be inserted into the third through hole on the limiting block 201, and then the sliding guide rod 20 is pushed to slide downwards, the sleeve 12 is upwards compressed through the reaction force of the elastic part 30, and then the lower end of the fixed sleeve 12 is restrained, so that the reactor core instrument assembly with the inner channel of the sleeve 12 is prevented from being influenced by water flow to generate potential vibration
In some embodiments, the third through hole is an inverted triangle structure, and the structure of the third through hole corresponds to the structure of the lower end of the sleeve 12. Since the third through hole is of an inverted triangle structure and the lower end of the sleeve 12 is also of an inverted triangle structure, the lower end of the sleeve 12 can be conveniently inserted into the third through hole.
In some embodiments, as shown in fig. 1, the instrument guide assembly compression damping mechanism of the present application further includes an end plug 40, the end plug 40 is disposed in the upper internals support column 10, one end of the end plug 40 facing the second through hole 102 is provided with a limit protrusion 401, the limit protrusion 401 is located in the second through hole 102, the lower end of the elastic member 30 abuts against the limit protrusion 401, the end plug 40 is provided with a second guide hole along the axial direction of the sliding guide 20, and the lower end of the sliding guide 20 passes through the limit protrusion 401 and then is located in the second guide hole. The end plug 40 serves to restrain the lower end of the sliding guide rod 20 while ensuring that the entire meter channel is continuously intact.
Further, as shown in fig. 1, the second guiding hole in the present application includes a fourth through hole 402 and a fifth through hole 403 that are coaxially communicated, an inner diameter of the fourth through hole 402 is greater than an inner diameter of the fifth through hole 403, the fourth through hole 402 is located above the fifth through hole 403, a lower end of the sliding guide rod 20 is located in the fourth through hole 402, a diameter of the lower end of the sliding guide rod 20 is greater than an inner diameter of the fifth through hole 403, and the sliding guide rod 20 is in clearance fit with the fourth through hole 402.
The invention further provides a reactor, which comprises a reactor body and the instrument guide assembly pressing and vibration reducing mechanism as described in any one of the embodiments of the application, wherein the instrument guide assembly pressing and vibration reducing mechanism is arranged on the reactor body.
In summary, the reactor core instrument guide assembly in the reactor of the present application is seated on the upper internals support column, and the integral assembly and the upper internals achieve accurate centering and positioning, and simultaneously can move up and down along the axis relative to the upper internals. An instrument channel sleeve 12 is arranged on the reactor core instrument guide assembly, and the sleeve 12 is inserted into the upper internals support column channel to provide a guide and protection channel for the instrument. The compaction vibration reduction mechanism is arranged in the upper reactor internals support column, and when the reactor runs, the compaction vibration reduction restraint on the lower end of the sleeve is realized, so that the reactor core measuring instrument assembly of the inner channel of the sleeve is prevented from generating potential vibration due to the influence of water flow, and the reactor core measuring instrument is protected.
The compression vibration reduction structure comprises a sliding guide rod 20 and a compression spring, wherein the compression spring is sleeved on the outer circle of the sliding guide rod 20, the sliding guide rod 20 is installed at the bottom of the supporting column, the lower end of the sliding guide rod 20 is inserted into a fourth through hole 402 on the supporting column end plug 40, the upper end of the sliding guide rod 20 is axially limited in the supporting column, the supporting column is prevented from being separated from the upper part, and the lower part of the sliding guide rod is not separated from the end plug all the time. The sliding guide 20 is provided with a clearance fit with the inner wall of the support post and the inner diameter of the end plug to ensure a centering and relative sliding function. When the reactor core instrument guide assembly is inserted downwards into the guide section of the head part of the sliding guide rod, the sliding guide rod is pushed to slide downwards, the sleeve is pressed upwards through the compression reaction force of the compression spring, and the lower end of the fixed sleeve is restrained, so that the reactor core instrument assembly of the channel in the sleeve is prevented from generating potential vibration due to the influence of water flow.
Through set up at the sleeve lower extreme and compress tightly damping mechanism, realize upwards compressing tightly the sleeve lower extreme through compression spring pretightning force to the reactor core measuring instrument subassembly of greatly reduced sleeve inner channel avoids receiving rivers to influence and produces latent vibration. Meanwhile, the pressing vibration reduction mechanism is arranged at the lower end of the supporting connecting column, can freely slide along the supporting column within the stroke range, and cannot be separated from the supporting column. When the instrument is low, the sleeve is compressed and serves as a part of an instrument channel to guide the reactor core instrument, so that the integrity of the instrument channel is ensured. The whole vibration damping mechanism is compact in design, few in relative movable parts, low in card-related risk and good in reliability. Meanwhile, the manufacturing and installation process is simple, the implementation is easy, and the manufacturing cost is low.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An instrument guide assembly compression damping mechanism comprising an upper internals support column (10), further comprising: sliding guide pole (20) and elastic component (30), the inside of sliding guide pole (20) is hollow structure along the axial, upper portion is piled in the component supporting post (10) and is provided with first guiding hole along the axial, sliding guide pole (20) set up in the first guiding hole on the component supporting post (10) is piled on upper portion, just sliding guide pole (20) can be followed axial displacement, elastic component (30) cover is established on sliding guide pole (20), the upper end of elastic component (30) with sliding guide pole (20) butt, the lower extreme with upper portion is piled in the component supporting post (10) butt.
2. The instrumentation guide assembly hold-down damping mechanism according to claim 1, wherein the first guide hole comprises a first through hole (101) and a second through hole (102) which are coaxially communicated, the diameter of the first through hole (101) corresponds to the diameter of a sleeve (12) on the core instrumentation guide assembly, the first through hole (101) is located above the second through hole (102), and the diameter of the first through hole (101) is smaller than that of the second through hole (102); the sliding guide rod (20) can move in the second through hole (102) along the axial direction.
3. The instrument guide assembly pressing and vibration damping mechanism according to claim 2 is characterized in that a limiting block (201) is arranged at the upper end of the sliding guide rod (20), the size of the limiting block (201) is matched with the inner diameter of the second through hole (102), the diameter of the limiting block (201) is larger than the inner diameter of the first through hole (101), a third through hole is formed in the limiting block (201) along the axial direction of the sliding guide rod (20), the third through hole is communicated with the inside of the sliding guide rod (20), and the upper end of the elastic part (30) is abutted to the limiting block (201).
4. The meter guide assembly hold down and vibration damping mechanism of claim 3, wherein the third through hole is of an inverted triangular configuration corresponding to the configuration of the lower end of the sleeve (12).
5. The instrument guide assembly compression damping mechanism according to claim 3, further comprising an end plug (40), wherein the end plug (40) is disposed in the upper internals support column (10), one end of the end plug (40) facing the second through hole (102) is provided with a limit protrusion (401), the limit protrusion (401) is located in the second through hole (102), the lower end of the elastic member (30) abuts against the limit protrusion (401), the end plug (40) is provided with a second guide hole along the axial direction of the slide guide rod (20), and the lower end of the slide guide rod (20) passes through the limit protrusion (401) and then is located in the second guide hole.
6. The meter guide assembly hold-down damping mechanism according to claim 5, wherein the second guide hole includes a fourth through hole (402) and a fifth through hole (403) which are coaxially communicated, the fourth through hole (402) has an inner diameter larger than that of the fifth through hole (403), the fourth through hole (402) is located above the fifth through hole (403), the lower end of the slide guide (20) is located in the fourth through hole (402), and the diameter of the lower end of the slide guide (20) is larger than that of the fifth through hole (403).
7. The meter guide assembly hold down damping mechanism of claim 6, wherein the sliding guide rod (20) is clearance fit with the fourth through hole (402).
8. The instrumentation guide assembly hold down damping mechanism of claim 2 wherein the first through hole (101) is clearance fit with a sleeve (12) on the core instrumentation guide assembly.
9. The meter guide assembly hold down damping mechanism of claim 1, wherein the resilient member (30) comprises a compression spring that is sleeved over the sliding guide rod (20).
10. A reactor, characterized by comprising a reactor body and the instrument guide assembly pressing and vibration damping mechanism as claimed in any one of claims 1 to 9, wherein the instrument guide assembly pressing and vibration damping mechanism is arranged on the reactor body.
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| CN202210021949.4A CN114382829B (en) | 2022-01-10 | 2022-01-10 | Instrument guide assembly compacting vibration reduction mechanism |
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| CN114382829B CN114382829B (en) | 2023-07-04 |
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| CN114382829B (en) | 2023-07-04 |
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