CN111968761A - Drive mechanism support structure and control rod drive wire - Google Patents
Drive mechanism support structure and control rod drive wire Download PDFInfo
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- CN111968761A CN111968761A CN202010761569.5A CN202010761569A CN111968761A CN 111968761 A CN111968761 A CN 111968761A CN 202010761569 A CN202010761569 A CN 202010761569A CN 111968761 A CN111968761 A CN 111968761A
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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
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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
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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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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The embodiment of the invention provides a driving mechanism supporting structure and a control rod driving wire, wherein the driving mechanism supporting structure comprises: the support device comprises a supporting piece, a supporting ring, a ring supporting piece and a lower end shrinkage hole piece; the inner wall of the ring support is provided with a support part; the lower side of the support ring is abutted against the support part, the upper side of the support ring is abutted against the bearing piece, the lower part of the bearing piece penetrates through the central hole of the support ring and is detachably connected with the upper end of the driving mechanism, and the upper end of the bearing piece is abutted against a component which is arranged in the guide cylinder and is axially fixed; the upper end of the lower end shrinkage hole piece is fixedly connected with the guide cylinder, the lower end of the lower end shrinkage hole piece is installed on the reactor core supporting plate, and the lower end shrinkage hole piece is sleeved on the outer side of the lower end of the driving mechanism and forms a gap with the lower end of the driving mechanism. Enough space is reserved for the operation of the hydraulic cylinder and the pin claw mechanism, the problem that the hydraulic cylinder and the pin claw mechanism are unreasonably stressed in the working state is solved, a water conduit of the driving mechanism is not interfered, and the performance and the reliability of the driving mechanism are improved.
Description
Technical Field
The invention relates to the technical field of nuclear reactor engineering, in particular to a driving mechanism supporting structure and a control rod driving wire.
Background
The built-in control rod driving technology has its driving mechanism set inside the reactor pressure container in high temperature, high pressure and irradiation environment, and adopts three hydraulic cylinders to drive the transmission and the two sets of pin and pawl mechanisms to move to realize the control rod raising, lowering and falling functions.
Based on the working principle of the driving mechanism, whether the supporting structure is reasonable or not directly influences the working performance, the service life and the reliability of the driving mechanism. The support of the drive mechanism needs to meet the following requirements: the stress is reasonable in the working process, and the additional stress on the hydraulic cylinder and the pin claw structure can not be generated to influence the movement of the hydraulic cylinder and the pin claw structure; the normal operation of the driving mechanism can be guaranteed under the conditions of earthquake, swing, inclination and impact; the long-distance disassembly and assembly is met; without interfering with the drive mechanism penstock. Therefore, a driving mechanism supporting structure needs to be created aiming at the characteristics of the movement of the hydraulic cylinder and the pin claw mechanism of the driving mechanism, so that the stress of the driving mechanism is in a stable pulling state, the hydraulic cylinder and the pin claw mechanism can keep free movement, the problem that the hydraulic cylinder and the pin claw mechanism are unreasonably stressed in the working state is solved, and the performance and the reliability of the driving mechanism are improved.
Disclosure of Invention
The embodiment of the invention provides a driving mechanism supporting structure and a control rod driving wire, which are used for solving the problem that a hydraulic cylinder and a pin claw mechanism are unreasonably stressed when a driving mechanism is in a working state in the prior art.
An embodiment of the present invention provides a driving mechanism support structure, including: the support device comprises a supporting piece, a supporting ring, a ring supporting piece and a lower end shrinkage hole piece;
the ring supporting piece is sleeved outside the driving mechanism and arranged on the guide cylinder of the driving mechanism, and a supporting part is arranged on the inner wall of the ring supporting piece;
the lower side of the support ring is abutted against the support part, the upper side of the support ring is abutted against the bearing part, three pipe penetrating grooves are formed in the support ring, and a notch is formed in one of the pipe penetrating grooves;
the lower part of the bearing piece penetrates through the central hole of the support ring and is detachably connected with the upper end of the driving mechanism, and the upper end of the bearing piece is abutted with a part which is arranged in the guide cylinder and is axially fixed;
the upper end of the lower end shrinkage hole piece is fixedly connected with the guide cylinder, the lower end of the lower end shrinkage hole piece is installed on the reactor core supporting plate, and the lower end shrinkage hole piece is sleeved on the outer side of the lower end of the driving mechanism and forms a gap with the lower end of the driving mechanism.
According to the driving mechanism supporting structure of one embodiment of the present invention, the driving mechanism supporting structure further includes a pressing disc spring, one side of the pressing disc spring abuts against the bearing member, and the other side of the pressing disc spring abuts against a member which is provided in the guide cylinder and is axially fixed.
According to the driving mechanism supporting structure of one embodiment of the present invention, the supporting portion is a protrusion structure provided on the inner wall of the ring support toward the axis of the ring support.
According to the drive mechanism support structure of one embodiment of the present invention, the support portions are provided at least two circumferentially spaced intervals on the inner wall of the ring support.
According to the driving mechanism supporting structure of one embodiment of the present invention, an outer shoulder is provided on an outer side of the supporting member, the supporting ring is sleeved with the supporting member, and an upper side of the supporting ring abuts against a lower side of the outer shoulder.
According to the supporting structure of the driving mechanism provided by the embodiment of the invention, the inner wall of the lower part of the supporting piece is provided with the internal thread, and the lower part of the supporting piece is sleeved on the outer side of the upper end of the driving mechanism and is in threaded connection with the upper end of the driving mechanism.
According to the driving mechanism supporting structure provided by the embodiment of the invention, the inner wall of the supporting piece is provided with the inner shoulder and the limiting groove along the axial direction of the supporting piece, the anti-rotation ring is arranged between the upper end of the driving mechanism and the lower side of the inner shoulder, the outer side of the anti-rotation ring is provided with the limiting bulge which is drawn into the supporting piece along the limiting groove, the inner side of the anti-rotation ring is provided with the limiting piece, and the limiting piece can be bent towards one side of the upper end of the driving mechanism and clamped into the groove at the upper end of the driving mechanism.
An embodiment of the present invention further provides a control rod drive line, including: the device comprises a guide cylinder, a driving mechanism, a spring box assembly, a rod position measuring assembly and a driving mechanism supporting structure of any one of the above parts;
the spring box assembly or the rod position measuring assembly and the driving mechanism supporting structure fix the driving mechanism in the guide cylinder;
avoidance channels capable of enabling the supporting part to slide through are arranged on the lifting cylinder outer sleeve cylinder, the transfer cylinder outer sleeve cylinder and the clamping cylinder outer sleeve cylinder of the driving mechanism;
the three water guide pipes of the driving mechanism are respectively penetrated by the three pipe penetrating grooves, and the water inlet of the lifting hydraulic cylinder of the driving mechanism is connected with the water guide pipes through the positions of the openings.
According to the control rod driving wire of one embodiment of the present invention, the guide cylinder includes an upper cylinder and a lower cylinder, both ends of the ring support are connected to a lower end of the upper cylinder and an upper end of the lower cylinder, respectively, and an upper end of the lower shrinkage cavity is connected to a lower end of the lower cylinder.
According to the control rod drive wire of one embodiment of the invention, the upper end and/or the lower end of the avoidance channel is/are provided with a flaring.
According to the driving mechanism supporting structure and the control rod driving wire provided by the embodiment of the invention, the driving mechanism can be fixed at the top of the driving mechanism through the bearing piece, the supporting ring and the ring supporting piece, the driving mechanism is hoisted in the guide cylinder, the inner wall of the guide cylinder is not attached to the hydraulic cylinder and the pin claw mechanism of the driving mechanism, enough space is reserved for the operation of the hydraulic cylinder and the pin claw mechanism, the problem that the hydraulic cylinder and the pin claw mechanism are unreasonably stressed in the working state is solved, the water conduit of the driving mechanism is not interfered, and the performance and the reliability of the driving mechanism are improved.
The lower end shrinkage piece can limit the lower end of the driving mechanism, so that the driving mechanism is kept vertical, and the running stability of the driving mechanism is maintained. The lower end shrinkage piece and the lower end of the driving mechanism form a gap, so that the running function of the driving mechanism under the conditions of earthquake, swing, inclination and impact can be guaranteed, and the problem of thermal expansion of the driving mechanism is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a mounting structure of a support structure of a driving mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a support structure of a driving mechanism according to another embodiment of the present invention;
FIG. 3 is a schematic view of the external structure of the driving mechanism according to an embodiment of the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 2;
FIG. 5 is an enlarged view of FIG. 2 at B;
FIG. 6 is a top view of the ring support;
FIG. 7 is a longitudinal cross-sectional view of the retainer;
FIG. 8 is a top view of an anti-rotation ring;
FIG. 9 is a schematic view of a support ring structure;
FIG. 10 is a schematic view of a lift cylinder positioning member;
reference numerals:
1. a support member; 11. an outer shoulder; 12. an inner shoulder; 13. a limiting groove; 14. an anti-rotation ring; 141. a limiting bulge; 142. a limiting sheet; 2. a support ring; 21. a pipe penetrating groove; 22. opening the gap; 3. a ring support; 31. a support portion; 4. a lower end hole shrinkage piece; 41. a gap; 5. a drive mechanism; 51. lifting the cylinder outer sleeve cylinder; 52. a transmission cylinder outer sleeve cylinder; 53. a clamping cylinder jacket cylinder; 54. avoiding the channel; 55. flaring; 56. a water conduit; 57. a lift cylinder positioning member; 58. a limiting plug; 59. a notch; 6. a guide cylinder; 61. feeding the cylinder; 62. a lower barrel; 7. pressing the disc spring; 8. a reactor core support plate; 9. a spring box assembly; 10. a rod position measuring assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
The driving mechanism supporting structure of the embodiment of the invention is mainly applied to a control rod driving wire and used for supporting and fixing the driving mechanism 5. The drive mechanism 5 on the control rod drive line includes a lift cylinder, transfer cylinder, clamping cylinder and pin jaw arrangement capable of driving the control rods for step up, step down and drop operations. The control rod drive wire has two structural forms, namely a rod position measuring assembly 10 and a spring box assembly 9 are arranged in the guide cylinder 6 (see figure 1, the rod position measuring assembly 10 is not shown in the figure) at the same time, and the spring box assembly 9 is arranged below the rod position measuring assembly 10; alternatively, by merely locating the rod position measuring assembly 10 within the guide cylinder 6 (see fig. 2), the drive mechanism support structure in the present embodiment can accommodate both forms of control rod drive line installation.
The drive mechanism support structure is described below with reference to the accompanying drawings:
with reference to fig. 1 to 5, the driving mechanism supporting structure includes a supporting member 1, a supporting ring 2, a ring supporting member 3, and a lower end hole shrinkage member 4, wherein the supporting member 1, the supporting ring 2, and the ring supporting member 3 can fix the upper end of the driving mechanism 5, and the lower end hole shrinkage member 4 can limit the lower end of the driving mechanism 5.
The ring support member 3 is sleeved outside the driving mechanism 5 and arranged on the guide cylinder 6 of the driving mechanism 5, the ring support member 3 and the guide cylinder 6 are coaxial, and the ring support member 3 cannot move axially or radially under the support of the guide cylinder 6.
Referring to fig. 4 and 6, a support portion 31 is disposed on the inner wall of the ring support 3, and the support portion 31 is a protruding structure on the inner wall of the ring support 3, and has a width direction along the radial direction of the ring support 3 and a length direction along the axial direction of the ring support 3. The support portion 31 and the ring support 3 may be formed integrally.
The support portion 31 can facilitate the mounting of the drive mechanism 5. Under the condition that the lifting cylinder, the transfer cylinder and the clamping cylinder of the driving mechanism 5 are provided with the grooves, when the driving mechanism 5 is hoisted, the supporting part 31 can be smoothly crossed by the groove positions of the lifting cylinder, the transfer cylinder and the clamping cylinder without influencing the downward placement of the driving mechanism 5.
In one embodiment, at least two supporting portions 31 are circumferentially arranged on the inner wall of the ring support 3 at intervals, and the supporting ring 2 is supported by more than two supporting portions 31, so that the stress is more balanced and the firmness is better. In further optimization scheme, supporting part 31 can set up threely, and evenly arranges in circumference on ring support piece 3's inner wall, adopts three supporting part 31 can satisfy the needs of firm support, by need not to open too much groove on lifting cylinder, transmission jar, centre gripping jar outer wall.
Referring to fig. 4 and 9, the support ring 2 is coaxial with the ring holder 3, and the lower side of the support ring 2 abuts against the support portion 31 and the upper side abuts against the receiver 1. The support part 31 can support the support ring 2, and at the same time, the support ring 2 can support the support member 1. Meanwhile, in order to avoid the influence of the supporting structure of the supporting ring 2 on the management arrangement of the driving mechanism 5, three pipe penetrating grooves 21 are arranged on the supporting ring 2, one of the pipe penetrating grooves 21 is provided with a notch 22, and the position of the notch 22 is the position of a water inlet pipe connector of a lifting cylinder on the driving mechanism 5.
The lower part of the supporting piece 1 penetrates through the center hole of the supporting ring 2 to be detachably connected with the upper end of the driving mechanism 5, and the upper end of the supporting piece 1 is abutted with a part which is arranged in the guide cylinder 6 and is axially fixed. The support ring 2 and the axially fixed part arranged in the guide cylinder 6 can thus together clamp the carrier 1, so that the upper end of the drive mechanism 5 is fixed.
In one embodiment, the axially fixed component disposed within the guide cylinder 6 may be a spring box structure (see FIG. 1), and in another embodiment the axially fixed component disposed within the guide cylinder 6 may be a rod position measurement structure (see FIG. 2), as determined by the particular needs of the control rod drive wire.
The upper end of the lower end shrinkage hole piece 4 is fixedly connected with the guide cylinder 6 in a threaded connection or welding mode. The lower end of the lower shrinkage-hole piece 4 is installed on the core support plate 8, and the control rods installed in the control rod driving wires can pass through the lower shrinkage-hole piece 4 and the core support plate 8 at the same time. The lower end shrinkage cavity piece 4 is sleeved outside the limiting blocking piece 58 at the lower end of the driving mechanism 5, and forms a gap 41 with the limiting blocking piece 58 at the lower end of the driving mechanism 5. The lower end shrinkage piece 4 has a limiting effect on the lower end of the driving mechanism 5, but the lower end of the driving mechanism 5 is not completely fixed, and the reserved gap 41 can adapt to the thermal expansion of the driving mechanism 5.
Under the supporting action of the driving supporting mechanism, the driving mechanism 5 is installed, the inner wall of the guide cylinder 6 does not need to be completely attached to the driving mechanism 5, and enough space can be reserved for the operation of the hydraulic cylinder and the pin claw mechanism.
Referring to fig. 4, in one embodiment, the driving mechanism supporting structure further comprises a pressing disc spring 7, and one side of the pressing disc spring 7 is abutted with the supporting member 1, and the other side is abutted with a component which is arranged in the guide cylinder 6 and is axially fixed, namely, the spring box assembly 9 or the rod position measuring assembly 10. The pressing disc spring 7 can enable the spring box component 9 or the rod position measuring component 10 to be elastically pressed with the supporting component 1, so that the component is prevented from being damaged by extrusion, the supporting component 1 can be always kept in a pressing state in the long-time use process, and the performance and the reliability of the driving mechanism 5 are improved.
With reference to fig. 4 and 7, the supporting member 1 is a combined sleeve structure with an upper outer diameter larger than a lower outer diameter, the upper portion of the combined sleeve structure can be sleeved outside the bottom end of the spring box assembly 9 or the rod position measuring assembly 10, and the upper portion of the combined sleeve structure with the lower inner diameter larger than the lower inner diameter of the supporting member 1, so that when the supporting member 1 is sleeved with the bottom end of the spring box assembly 9 or the rod position measuring assembly 10, the spring box assembly 9 or the rod position measuring assembly 10 can extrude the supporting member 1. The socket structure of the support 1 and the bottom end of the spring box assembly 9 or the rod position measuring assembly 10 can also facilitate the installation of the compression disc spring 7.
The diameter of the lower part of the supporting piece 1 is smaller than that of the upper part, so that the lower part of the supporting piece 1 can smoothly pass through the central hole of the supporting ring 2 to be connected with the upper end of the driving mechanism 5. The outer side of the supporting piece 1 is provided with an outer shoulder 11, the outer shoulder 11 is a part of the upper bottom end of the supporting piece 1, which protrudes out of the lower part of the supporting piece 1 along the radial direction of the supporting piece 1, and the upper side of the supporting ring 2 is abutted against the lower side of the outer shoulder 11, so that the supporting of the supporting ring 2 on the supporting piece 1 is realized.
The inner wall of the lower part of the supporting piece 1 is provided with an internal thread, the lower part of the supporting piece 1 is sleeved outside the upper end of the driving mechanism 5 and is in threaded connection with the lifting cylinder positioning piece 57 at the upper end of the driving mechanism 5, and the connecting mode is stable in structure, small in occupied space and easy to install.
With reference to fig. 4, 7 and 8, in one embodiment, the inner wall of the support 1 is provided with an inner shoulder 12 and a limit groove 13 along the axial direction of the support 1, and an anti-rotation ring 14 is provided between the upper end of the driving mechanism 5 and the lower side of the inner shoulder 12. The outer diameter of the anti-rotation ring 14 is not larger than the inner diameter of the lower part of the supporting piece 1, and the anti-rotation ring 14 can slide into the position of the inner shoulder 12 from the lower end opening of the supporting piece 1.
The outer side of the anti-rotation ring 14 is provided with a limiting protrusion 141 which is drawn into the supporting member 1 along the limiting groove 13, the limiting protrusion 141 is a protrusion structure which extends along the anti-rotation ring 14 in the radial direction towards the outer side of the anti-rotation ring 14, and when the anti-rotation ring 14 slides into the lower part of the supporting member 1 from the lower end of the supporting member 1, the limiting protrusion 141 slides into the limiting groove 13 from the lower end of the limiting groove 13. After the limiting protrusion 141 is matched with the limiting groove 13, the rotation-preventing ring 14 and the supporting member 1 cannot rotate relatively. The limit protrusion 141 and the limit groove 13 may be provided in only one set, or may be provided in more than two sets.
The inner side of the anti-rotation ring 14 is provided with a limiting piece 142, and the limiting piece 142 is a thin sheet structure with one end connected with the inner side of the anti-rotation ring 14 and the other end extending towards the axis of the anti-rotation ring 14. The stopper piece 142 can be bent toward the upper end side of the drive mechanism 5 and is caught in a notch 59 (see fig. 10) at the top end of the lift cylinder positioning piece 57 at the upper end of the drive mechanism 5. At this time, the limiting piece 142 and the upper end of the driving mechanism 5 cannot rotate relatively, so that the supporting piece 1 and the upper end of the driving mechanism 5 cannot rotate relatively, and the anti-loosening effect is achieved.
The limiting piece 142 may be formed by cutting the anti-rotation ring 14, and a plurality of limiting pieces 142 are circumferentially arranged on the inner side of the anti-rotation ring 14, so as to be adapted to the position of the notch 59 of the lifting cylinder positioning piece 57 at the upper end of the driving mechanism 5.
It should be noted that, in order to increase the firmness and stability of the mounting structure, the supporting structure of the driving mechanism is supported by using the supporting ring 2, and the supporting ring 2 is made of a wear-resistant material in a high-temperature and high-pressure environment, and specifically, a GH4169 material may be used, so as to meet the application requirements of nuclear reactor engineering.
Referring to fig. 1 to 3, in one embodiment of the present invention, a control rod drive line structure is provided, and the control rod drive line supports the drive mechanism 5 using the drive mechanism support structure of any of the above embodiments.
Specifically, the control rod drive wire structure comprises a guide cylinder 6, a drive mechanism 5, a spring box assembly 9, a rod position measuring assembly 10 and a drive mechanism supporting structure, wherein the rod position measuring assembly 10 is arranged above the drive mechanism 5, and the spring box assembly 9 can be arranged in the guide cylinder 6 or can be arranged outside the guide cylinder 6 and connected with a control rod. When the spring box assembly 9 is disposed within the guide cylinder 6, the spring box assembly 9 is positioned between the rod position measuring assembly 10 and the drive mechanism 5, and the spring box assembly 9 and the drive mechanism support structure secure the drive mechanism 5 within the guide cylinder 6. When the spring box assembly 9 is located outside the guide cylinder 6, the rod position measuring assembly 10 and the drive mechanism support structure fix the drive mechanism 5 within the guide cylinder 6.
The lift cylinder outer sleeve cylinder 51, the transfer cylinder outer sleeve cylinder 52 and the clamp cylinder outer sleeve cylinder 53 of the driving mechanism 5 are all provided with an avoidance channel 54, and the avoidance channel 54 extends along the axial direction of the lift cylinder outer sleeve cylinder 51, the transfer cylinder outer sleeve cylinder 52 and the clamp cylinder outer sleeve cylinder 53, and the width of the avoidance channel 54 is not less than the width of the support part 31. The number of escape passages 54 in the lift cylinder outer sleeve cylinder 51, the transfer cylinder outer sleeve cylinder 52, and the clamp cylinder outer sleeve cylinder 53 is the same as the number of the support portions 31. When the driving mechanism 5 is hoisted into the guide cylinder 6, the support portion 31 can slide through the escape passage 54. The design of the avoiding channel 54 can fully save the installation space on the premise of ensuring the smooth hoisting of the driving mechanism 5.
Three water guide pipes 56 of the driving mechanism 5 are respectively penetrated by three pipe penetrating grooves 21, and the water inlet of the lifting hydraulic cylinder of the driving mechanism 5 is connected with the water guide pipes 56 by the position of the opening 22.
In one embodiment, the guide cylinder 6 includes an upper cylinder 61 and a lower cylinder 62, both ends of the ring support 3 are connected to the lower end of the upper cylinder 61 and the upper end of the lower cylinder 62, respectively, and the upper end of the lower shrinkage-hole member 4 is connected to the lower end of the lower cylinder 62. The guide cylinder 6 is provided with an upper and lower split structure, which facilitates the installation of the ring support 3.
In one embodiment, the upper end and/or the lower end of the avoidance channel 54 is provided with a flared opening 55, the flared opening 55 is in an opening shape with gradually increasing width at the end of the avoidance channel 54, and the support portion 31 can be smoothly slid into the avoidance channel 54 by providing the structure of the flared opening 55.
When the installation is carried out, the ring support piece 3 and the lower end shrinkage hole piece 4 are installed on the guide cylinder 6 of the driving mechanism 5, the support ring 2 is sleeved on the support piece 1, the lower end of the support piece 1 is tightly suspended with the upper end of the driving mechanism 5, the limiting piece 142 is bent into the groove in the upper end of the driving mechanism 5, the support piece 1 is fixedly connected with the upper end of the driving mechanism 5, the driving mechanism 5 is hoisted into the guide cylinder 6, the upper end of the support part 31 on the ring support piece 3 is abutted against the support ring 2 at the moment, and finally the spring box component 9 and/or the rod position measuring component 10 are installed, so that the driving mechanism 5 is fixed.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A drive mechanism support structure, comprising: the support device comprises a supporting piece, a supporting ring, a ring supporting piece and a lower end shrinkage hole piece;
the ring supporting piece is sleeved outside the driving mechanism and arranged on the guide cylinder of the driving mechanism, and a supporting part is arranged on the inner wall of the ring supporting piece;
the lower side of the support ring is abutted against the support part, the upper side of the support ring is abutted against the bearing part, three pipe penetrating grooves are formed in the support ring, and a notch is formed in one of the pipe penetrating grooves;
the lower part of the bearing piece penetrates through the central hole of the support ring and is detachably connected with the upper end of the driving mechanism, and the upper end of the bearing piece is abutted with a part which is arranged in the guide cylinder and is axially fixed;
the upper end of the lower end shrinkage hole piece is fixedly connected with the guide cylinder, the lower end of the lower end shrinkage hole piece is installed on the reactor core supporting plate, and the lower end shrinkage hole piece is sleeved on the outer side of the lower end of the driving mechanism and forms a gap with the lower end of the driving mechanism.
2. The drive mechanism support structure of claim 1, further comprising a hold-down disc spring abutting the bearing on one side and an axially fixed component disposed within the guide cylinder on the other side.
3. The drive mechanism support structure of claim 1, wherein the support portion is a projection structure provided on an inner wall of the ring support toward an axial center of the ring support.
4. The drive mechanism support structure of claim 1, wherein the support portions are provided at least two circumferentially spaced intervals on the inner wall of the ring support.
5. The drive mechanism support structure according to claim 1, wherein an outer shoulder is provided on an outer side of the retainer, the support ring is fitted to the retainer, and an upper side of the support ring abuts against a lower side of the outer shoulder.
6. The drive mechanism support structure of claim 1, wherein the inner wall of the lower portion of the support member is provided with an internal thread, and the lower portion of the support member is sleeved outside the upper end of the drive mechanism and is in threaded connection with the upper end of the drive mechanism.
7. The driving mechanism supporting structure according to claim 1, wherein an inner shoulder and a limiting groove along an axial direction of the supporting member are arranged on an inner wall of the supporting member, an anti-rotation ring is arranged between an upper end of the driving mechanism and a lower side of the inner shoulder, a limiting protrusion which is drawn into the supporting member along the limiting groove is arranged on an outer side of the anti-rotation ring, a limiting piece is arranged on an inner side of the anti-rotation ring, and the limiting piece can be bent towards one side of the upper end of the driving mechanism and clamped into the groove which is located on the upper end of the driving mechanism.
8. A control rod drive wire, comprising: a guide cylinder, a drive mechanism, a box spring assembly, a rod position measuring assembly and a drive mechanism support structure according to any one of claims 1 to 7;
the spring box assembly or the rod position measuring assembly and the driving mechanism supporting structure fix the driving mechanism in the guide cylinder;
avoidance channels capable of enabling the supporting part to slide through are arranged on the lifting cylinder outer sleeve cylinder, the transfer cylinder outer sleeve cylinder and the clamping cylinder outer sleeve cylinder of the driving mechanism;
the three water guide pipes of the driving mechanism are respectively penetrated by the three pipe penetrating grooves, and the water inlet of the lifting hydraulic cylinder of the driving mechanism is connected with the water guide pipes through the positions of the openings.
9. The control rod drive line according to claim 8, wherein the guide cylinder includes an upper cylinder and a lower cylinder, both ends of the ring support are connected to a lower end of the upper cylinder and an upper end of the lower cylinder, respectively, and an upper end of the lower reducer is connected to a lower end of the lower cylinder.
10. The control rod drive line as set forth in claim 8, wherein an upper end and/or a lower end of the bypass channel is provided with a flare.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761569.5A CN111968761B (en) | 2020-07-31 | 2020-07-31 | Drive mechanism support structure and control rod drive wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010761569.5A CN111968761B (en) | 2020-07-31 | 2020-07-31 | Drive mechanism support structure and control rod drive wire |
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| CN111968761B CN111968761B (en) | 2022-09-16 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421673A (en) * | 2021-06-23 | 2021-09-21 | 中国核动力研究设计院 | Disassembling tool for nuclear reactor control rod accelerating spring |
| CN113838585A (en) * | 2021-09-22 | 2021-12-24 | 中国原子能科学研究院 | Control rod driving mechanism, butt joint separation device and operation method |
| RU2811134C1 (en) * | 2023-06-13 | 2024-01-11 | Роман Евгеньевич Тишин | Nuclear reactor control drive |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421673A (en) * | 2021-06-23 | 2021-09-21 | 中国核动力研究设计院 | Disassembling tool for nuclear reactor control rod accelerating spring |
| CN113838585A (en) * | 2021-09-22 | 2021-12-24 | 中国原子能科学研究院 | Control rod driving mechanism, butt joint separation device and operation method |
| CN113838585B (en) * | 2021-09-22 | 2023-11-10 | 中国原子能科学研究院 | Control rod driving mechanism, butt joint separation device and operation method |
| RU2811134C1 (en) * | 2023-06-13 | 2024-01-11 | Роман Евгеньевич Тишин | Nuclear reactor control drive |
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| CN111968761B (en) | 2022-09-16 |
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