Driving rod seat and reactor

Abstract

The invention provides a driving rod seat and a reactor. The driving rod seat comprises a tube seat assembly and a thermal sleeve. The tube base assembly is used for connecting a pressure vessel top cover and a control rod driving mechanism, and a first channel is formed in the tube base assembly. The interior of the heat sleeve is used for allowing the driving rod to penetrate through, and the heat sleeve is contained in the first channel. The reactor provided by the invention comprises a pressure vessel top cover, a water outlet assembly and the driving rod seat in the embodiment. According to the driving rod seat and the reactor provided by the invention, as the heat sleeve is accommodated in the first channel, the side wall of the pipe seat assembly can prevent fluid from impacting the heat sleeve in the radial direction, so that the vibration of the heat sleeve in the working process is reduced, the heat sleeve is less prone to being abraded, the abrasion rate is reduced, the service life of the heat sleeve is longer, and the service life of the heat sleeve is prolonged. And the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant technology, specifically to a drive rod holder and a reactor. Background Technology

[0002] In related technologies, the control rod drive mechanism is fixed to the outside of the pressure vessel via a tube seat and can control the drive rod located inside the tube seat to enter and exit the pressure vessel, thereby controlling the reactor reaction process. A heat jacket is installed between the drive rod and the tube seat to accelerate the process of the drive rod entering the pressure vessel. However, the heat jacket will gradually wear down during long-term operation, and the heat jacket flange will also fall off into the tube seat after the heat jacket is severely worn, causing the drive rod to jam and affecting the process of the drive rod entering and exiting the pressure vessel.

[0003] To address the aforementioned issues, some technologies employ a heat jacket seated on a mounting base by gravity, allowing for vertical movement, lateral swinging, and axial rotation. Wear inevitably occurs between the heat jacket and the mounting base. During unit operation, the wear level of the heat jacket is checked, and repairs or replacements are performed once the wear criteria are met. In some technologies, the heat jacket flange consists of two half-rings and a support ring. This design facilitates flange replacement; when the flange wears to the point of needing replacement, the heat jacket is lifted, allowing the two half-rings and support ring to be removed sequentially, and new two half-rings and support rings to form a new heat jacket flange structure.

[0004] The above solution can effectively reduce the jamming of the drive rod by periodically replacing part or all of the structure of the heat jacket, but it still has the problems of high wear rate and short maintenance cycle of heat jacket. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a drive rod seat that can reduce the wear rate of the heat jacket, extend the maintenance cycle of the heat jacket, and reduce maintenance costs.

[0006] The present invention also proposes a reactor having the above-described drive rod seat.

[0007] According to a first aspect of the present invention, a drive lever holder includes: A tube seat assembly for connecting the pressure vessel top cover and the control rod drive mechanism, wherein the tube seat assembly has a first channel inside; A heat-insulating sleeve, internally for the drive rod to pass through, is housed within the first channel.

[0008] According to the embodiments of the present invention, the drive rod seat has at least the following beneficial effects: since the heat jacket is housed in the first channel, the sidewall of the tube seat assembly can prevent the fluid from impacting the heat jacket radially, thereby reducing the vibration of the heat jacket during operation, making the heat jacket less prone to wear, reducing the wear rate, and extending the service life of the heat jacket, which is beneficial to reducing maintenance costs.

[0009] According to some embodiments of the present invention, the tube seat assembly includes a tube seat unit and a horn cover. The tube seat unit includes a first connecting end and a second connecting end. The first connecting end is used to connect to the control rod drive mechanism, and the second connecting end is connected to the horn cover. The first channel has a second connecting section inside the horn cover. The cross-sectional area of ​​the second connecting section perpendicular to a first direction gradually increases along the first direction. The first direction is the direction from the first connecting end to the second connecting end.

[0010] According to some embodiments of the present invention, the tube seat unit further includes a tube seat and an extension tube, the tube seat being used to connect to the pressure vessel top cover and to the extension tube, the tube seat including a first connecting end, and the extension tube including a second connecting end; Alternatively, the tube seat unit may further include a tube seat for connecting to the pressure vessel top cover, and include a first connecting end and a second connecting end.

[0011] According to some embodiments of the present invention, the tube seat unit includes a tube seat and an extension tube. The tube seat is used to connect to the top cover of the pressure vessel and is connected to the extension tube. The tube seat includes a first connecting end, and the extension tube includes a second connecting end. The first channel has a first connecting section inside the tube seat and a third connecting section inside the extension tube. One end of the heat-shrinking tube along the first direction forms a third connecting end, and the third connecting end is located in the first connecting section, the second connecting section, or the third connecting section. Alternatively, the tube seat unit includes a tube seat for connecting the pressure vessel top cover, and includes a first connecting end and a second connecting end; the first channel has a first connecting section inside the tube seat, and one end of the heat jacket along the first direction forms a third connecting end, and the third connecting end is accommodated within the first connecting section or the second connecting section.

[0012] According to some embodiments of the present invention, the tube seat assembly includes a first connecting end and a second connecting end, wherein the first connecting end is used to connect to a control rod drive mechanism; The drive rod seat includes a horn cover, which is connected to one side of the heat jacket in a first direction. The first channel has a second connecting section inside the horn cover, and the cross-sectional area of ​​the second connecting section perpendicular to the first direction gradually increases along the first direction. The first direction is the direction from the first connecting end to the second connecting end.

[0013] According to some embodiments of the present invention, the tube seat unit further includes a tube seat and an extension tube, the tube seat being used to connect to the pressure vessel top cover and connected to the extension tube, the tube seat including a first connecting end, and the extension tube including a second connecting end; the first channel having a first connecting section inside the tube seat and a third connecting section inside the extension tube; The cross-sectional area of ​​the third connecting segment perpendicular to the first direction is greater than the cross-sectional area of ​​the first connecting segment perpendicular to the first direction. Alternatively, the third connecting segment includes a first extension segment and a first guiding segment, the first extension segment being located on one side of the first guiding segment in the first direction, and the inner wall surface of the first guiding segment being connected to the inner wall surface of the first extension segment; along the first direction, the cross-sectional area of ​​the first guiding segment perpendicular to the first direction gradually increases, and the cross-sectional area of ​​the first extension segment perpendicular to the first direction is greater than the cross-sectional area of ​​the first connecting segment perpendicular to the first direction.

[0014] According to some embodiments of the present invention, the tube seat unit further includes a tube seat and an extension tube, the tube seat being used to connect to the pressure vessel top cover and connected to the extension tube, the tube seat including a first connecting end, and the extension tube including a second connecting end; the first channel having a first connecting section inside the tube seat and a third connecting section inside the extension tube; The pipe seat includes a pipe seat body and a first sleeve portion connected together. The pipe seat body includes a first connecting end, and the first sleeve portion is connected to one end of the pipe seat body in the first direction. The extension pipe includes an extension pipe body and a second sleeve portion, and the second sleeve portion is connected to one end of the extension pipe body in the opposite direction from the first direction. The first sleeve portion and the second sleeve portion are sleeved together to connect the second connecting segment and the third connecting segment. The heat sleeve includes a third connecting end, which is located on one side in the first direction and is located in the second connecting segment or the third connecting segment; the first sleeve portion is sleeved on the outside of the second sleeve portion.

[0015] According to some embodiments of the present invention, the tube socket unit further includes a tube socket and an extension tube; One end of the extension tube is integrally connected to one side of the tube seat along the first direction, and the other end is integrally connected to the horn cover. Alternatively, one end of the extension tube is threaded to one side of the tube seat along the first direction, and the other end is threaded to the horn cover; Alternatively, one end of the extension tube is sleeved on one side of the tube seat along the first direction, and the other end is sleeved on the horn cover.

[0016] According to some embodiments of the present invention, the tube assembly includes a first connecting end and a second connecting end, the first connecting end being used to connect to a control rod drive mechanism, the heat sleeve having a second channel, and further including a sleeve body and a flow guide, the sleeve body being connected to the flow guide on one side in a first direction; the first direction is the direction from the first connecting end to the second connecting end; The second channel is used to accommodate the drive rod and has a fourth connecting section inside the sleeve body and a second guiding section inside the flow guide; along the first direction, the cross-sectional area of ​​the second guiding section perpendicular to the first direction gradually increases along the first direction.

[0017] A reactor according to a second aspect of the present invention comprises: The drive rod seat as described in any of the above embodiments; The pressure vessel top cover has a receiving cavity for containing fluid; a portion of the tube seat assembly is located outside the receiving cavity and is connectable to the control rod drive mechanism, while a portion of the tube seat assembly is inserted into the receiving cavity. A water outlet assembly has a water outlet connected to the receiving cavity and used to spray the fluid into the receiving cavity.

[0018] The reactor according to embodiments of the present invention has at least the following beneficial effects: Since the heat-insulating sleeve in the above embodiment is inserted into the cavity, the heat-insulating sleeve can prevent the fluid flowing toward the cavity from flowing directly through the part of the sleeve welded to the top cover of the pressure vessel, thereby reducing the thermal fatigue of the weld.

[0019] According to some embodiments of the present invention, the tube seat assembly includes a tube seat that is inserted into the pressure vessel top cover and into the receiving cavity, the circumferential sidewall of the tube seat is welded to the inner wall of the pressure vessel top cover, and the heat sleeve is inserted into the interior of the receiving cavity.

[0020] According to some embodiments of the present invention, the reactor includes a plurality of control rod drive mechanisms and a plurality of drive rod seats, each of the tube seat assemblies includes a tube seat and a horn cover, a portion of each tube seat is located outside the receiving cavity and is connectable to the control rod drive mechanism, and another portion of each tube seat is inserted into the receiving cavity and connected to the horn cover; The circumferential sidewall of each of the tube seats is welded to the inner wall of the pressure vessel top cover; along the direction in which the tube seat is inserted into the receiving cavity, the end of each tube seat is equidistant from the inner wall surface of the receiving cavity.

[0021] According to some embodiments of the present invention, the inner wall surface of the receiving cavity is an arc surface, and the height of each of the horn covers is the same; each of the drive rod seats further includes an extension tube, and each of the tube seats is connected to the horn cover through the extension tube.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a partial structural schematic diagram of a reactor according to some embodiments of the first aspect of the present invention; Figure 2 for Figure 1 Overall schematic diagram of the drive rod seat; Figure 3 for Figure 2 A magnified view shown at point A in the middle; Figure 4 This is an overall schematic diagram of the drive rod seat according to some embodiments of the second aspect of the present invention; Figure 5 for Figure 2 The enlarged view shown at point B in the middle; Figure 6 This is an overall schematic diagram of the drive rod seat according to some embodiments of the third aspect of the present invention; Figure 7 for Figure 6 A magnified view of the area shown at point C.

[0024] Figure label: Drive rod seat 10; Pipe socket assembly 100, first channel 110, pipe socket unit 120, pipe socket 121, first connecting section 1211, pipe socket body 1212, first socket part 1213, extension tube 122, third connecting section 1221, first extension section 12211, first guide section 12212, extension tube body 1222, second socket part 1223, first connecting end 130, second connecting end 140, horn cover 150, second connecting section 151; The components include: a heat jacket 200, a third connecting end 210, a second channel 220, a jacket body 230, a fourth connecting section 231, a flow guide 240, a second guiding section 241, and a heat jacket flange 250. Pressure vessel top cover 20, receiving cavity 21; Control rod drive mechanism 30, drive rod 31; Water outlet component 40, water outlet 41; Weld 50; Control rod guide cylinder 60. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0028] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Please refer to Figures 1 to 7 As shown, the present invention proposes a drive rod seat 10, including a tube seat assembly 100 and a heat sleeve 200.

[0031] Please refer to Figure 1 and Figure 2 As shown, where Figure 2 The control rod drive mechanism 30 is not shown. The tube seat assembly 100 of the present invention is used to connect the pressure vessel top cover 20 and the control rod drive mechanism 30. The tube seat assembly 100 has a first channel 110 inside. The pressure vessel top cover 20 referred to in the present invention is the top cover part of the pressure vessel, which, together with other parts of the pressure vessel, defines a space for accommodating the reactor core, in-core components, fluids, and part of the control rod assembly. The tube seat assembly 100 connected to the pressure vessel top cover 20 provides the control rod drive mechanism 30 with a first channel 110 for the drive rod 31 to pass through, so that the drive rod 31 of the control rod drive mechanism 30 located on one side of the pressure vessel top cover 20 can pass through the first channel 110 to the other side of the pressure vessel top cover 20. When controlling the reactor process, the control rod drive mechanism 30 can enter and exit the internal space of the pressure vessel by controlling the drive rod 31 to control the reactor reaction process. The control rod drive mechanism 30 can be installed by connecting and fixing it to one side of the pressure vessel top cover 20 with the tube seat assembly 100 of the present invention.

[0032] The interior of the thermal mantle 200 of the present invention is used for the drive rod 31 to pass through. During reactor process control, the thermal mantle 200 is located between the inner wall of the first channel 110 and the drive rod 31, and assists in accelerating the drive rod 31 as it enters the pressure vessel, thereby improving control efficiency. Specifically, when the drive rod 31 of the control rod drive mechanism 30 enters the interior of the pressure vessel through the first channel 110, it compresses the fluid inside the pressure vessel, increasing the pressure inside the pressure vessel. The heat jacket 200 is also compressed by the internal fluid and moves away from the interior of the pressure vessel, thus forming a channel between the inner wall of the first channel 110 and the heat jacket 200. The compressed fluid on one side of the heat jacket 200 in the extension direction can flow from the inner wall of the first channel 110 and the heat jacket 200 to the other side of the heat jacket 200 in the extension direction. Less fluid enters between the drive rod 31 and the interior of the heat jacket 200, resulting in less fluid resistance and a faster entry speed for the drive rod 31 when it enters the interior of the pressure vessel.

[0033] When the heat jacket 200 of the present invention is housed in the first channel 110, the sidewall of the tube seat assembly 100 can prevent the fluid from impacting the heat jacket 200 radially, thereby reducing the vibration of the heat jacket 200 during operation. The heat jacket 200 is less prone to wear, the wear rate decreases, and the service life of the heat jacket 200 is longer, which helps to reduce maintenance costs.

[0034] It should be noted that, without departing from the inventive concept of this invention, those skilled in the art can use the existing heat jacket 200 structure to achieve the effect of the heat jacket 200 accelerating the drive rod 31. For example, please refer to... Figure 2 As shown, in some embodiments, the heat jacket 200 includes a heat jacket 200 flange, which is located at one end of the heat jacket 200 and overlaps with the side of the pipe seat assembly 100 for connecting the control rod drive mechanism 30. After the drive rod 31 enters the pressure vessel, the fluid inside the pressure vessel can compress the heat jacket 200 and release the overlap between the heat jacket 200 flange and the pipe seat assembly 100, so that the space between the inner wall of the first channel 110 and the heat jacket 200 forms a channel. The compressed fluid on one side of the heat jacket 200 in the extension direction can flow from the space between the inner wall of the first channel 110 and the heat jacket 200 to the other side of the heat jacket 200 in the extension direction. Less fluid enters between the drive rod 31 and the interior of the heat jacket 200, resulting in less fluid resistance and a faster entry speed for the drive rod 31 when it enters the interior of the pressure vessel.

[0035] In some embodiments, the drive rod holder 10 further includes a horn cover 150, the interior of which is used to guide the drive rod 31. The horn cover 150 can guide the drive rod 31 by its own shape. During the assembly of the reactor, one end of the drive rod 31 can pass through the first channel 110 through the guiding effect of the horn cover 150, thereby facilitating subsequent connection with other parts of the control rod drive mechanism 30.

[0036] Based on the above solution, those skilled in the art can choose the connection method of the speaker cover 150.

[0037] As a preferred option, please refer to Figure 6 , Figure 7 As shown, in some embodiments, the tube seat assembly 100 includes a first connecting end 130 and a second connecting end 140. The first connecting end 130 is used to connect to the control rod drive mechanism 30. The drive rod seat 10 includes a horn cover 150, which is connected to one side of the heat jacket 200 in a first direction. The first channel 110 has a second connecting section 151 inside the horn cover 150. The cross-sectional area of ​​the second connecting section 151 perpendicular to the first direction gradually increases along the first direction. The first direction is the direction from the first connecting end 130 to the second connecting end 140 (that is, the first direction is...). Figure 6 (downward direction in the middle).

[0038] One end of the drive rod 31 can be reversed in the first direction during reactor assembly (that is, the reverse direction of the first direction is...). Figure 6The drive rod 31 enters the second connecting section 151 from the upper direction. Since the cross-sectional area of ​​the second connecting section 151 perpendicular to the first direction gradually increases along the first direction, and the horn cover 150 is directly connected to the heat sleeve 200, when one end of the drive rod 31 continues to extend into the second connecting section 151 in the reverse direction of the first direction, it will be directly guided into the interior of the heat sleeve 200 by the supporting force of the inner wall of the second connecting section 151, and finally pass through the interior of the heat sleeve 200 and through the first channel 110, thus facilitating subsequent connection with other parts of the control rod drive mechanism 30.

[0039] As another preferred option, please refer to Figure 2 , Figure 5 As shown, in some embodiments, the tube socket assembly 100 includes a tube socket unit 120 and a horn cover 150. The tube socket unit 120 includes a first connecting end 130 and a second connecting end 140. The first connecting end 130 is used to connect to the control rod drive mechanism 30, and the second connecting end 140 is connected to the horn cover 150. The horn cover 150 has a second connecting section 151 inside, and the cross-sectional area of ​​the second connecting section 151 perpendicular to the first direction gradually increases along the first direction. The first direction is the direction from the first connecting end 130 to the second connecting end 140 (that is, the first direction is...). Figure 2 (downward direction in the middle).

[0040] One end of the drive rod 31 can be reversed in the first direction during reactor assembly (that is, the reverse direction of the first direction is...). Figure 2 The drive rod 31 enters the second connecting section 151 in the upward direction. Since the cross-sectional area of ​​the second connecting section 151, perpendicular to the first direction, gradually increases along the first direction, one end of the drive rod 31, continuing to extend into the second connecting section 151 in the opposite direction of the first direction, will be guided by the supporting force of the inner wall of the second connecting section 151 to the interior of the tube seat unit 120, then through the interior of the heat jacket 200, and through the first channel 110, thus facilitating subsequent connection with other parts of the control rod drive mechanism 30. On the other hand, since the horn cover 150 is connected to the tube seat unit 120, the vibration caused to the heat jacket 200 when one end of the drive rod 31 is guided into the interior of the tube seat unit 120 is also smaller, which helps to reduce the wear on the heat jacket 200 during reactor installation.

[0041] Without departing from the inventive concept of the present invention, the present invention does not impose specific limitations on the structure of the tube seat unit 120.

[0042] Please refer to Figure 2As shown, in some embodiments, the tube seat unit 120 further includes a tube seat 121, which is used to connect the pressure vessel top cover 20. The tube seat 121 includes a first connecting end 130 and a second connecting end 140. With the above solution, one end of the tube seat 121 is directly used to connect to the control rod drive mechanism 30, and the other end is directly connected to the horn cover 150, which makes installation relatively simple and has high assembly efficiency.

[0043] Based on the above scheme, the end position of the heat jacket 200 can be further adjusted.

[0044] In some embodiments, the tube seat 121 has a first connecting section 1211 inside, and one end of the heat jacket 200 along a first direction forms a third connecting end 210, which is accommodated within a second connecting section 151. Since the third connecting end 210 is accommodated within the second connecting section 151, the sidewalls of the tube seat 121 and the horn cover 150 can jointly prevent the fluid from radially impacting the heat jacket 200, thereby reducing the vibration of the heat jacket 200 during operation.

[0045] Please refer to Figure 4 As shown, in some embodiments, the tube seat 121 has a first connecting section 1211 inside, and one end of the heat jacket 200 along the first direction forms a third connecting end 210, which is accommodated within the first connecting section 1211. Because the third connecting end 210 is accommodated within the first connecting section 1211, the sidewall of the tube seat 121 can prevent fluid from radially impacting the heat jacket 200, thereby reducing the vibration of the heat jacket 200 during operation. On the other hand, because the third connecting end 210 is accommodated within the first connecting section 1211, the distance between the end of the horn cover 150 in the first direction and the third connecting end 210 is greater, making it less likely for fluid in the reactor to flow from one side of the horn cover 150 in the first direction into the first channel 110 and contact the heat jacket 200, further reducing the risk of vibration in the heat jacket 200.

[0046] As a preferred embodiment of the tube socket unit 120, please refer to Figure 2 , Figure 3As shown, in some embodiments, the pipe seat unit 120 further includes a pipe seat 121 and an extension pipe 122. The pipe seat 121 is used to connect to the pressure vessel top cover 20 and is connected to the extension pipe 122. The pipe seat 121 includes a first connecting end 130, and the extension pipe 122 includes a second connecting end 140. With the above scheme, the pipe seat 121 is connected to the horn cover 150 through the extension pipe 122. Thus, the length of the pipe seat unit 120 in the first direction is longer, and the length of the first channel 110 in the first direction is also longer. The sidewalls of the pipe seat 121 and the sidewalls of the extension pipe 122 can jointly prevent the fluid from impacting the drive rod 31 radially, thereby reducing the vibration of the drive rod 31 during operation. On the other hand, since the tube seat 121 is connected to the horn cover 150 through the extension tube 122, the distance between the end of the horn cover 150 in the first direction and the third connection end 210 is greater, and the fluid in the reactor is less likely to flow from one side of the horn cover 150 in the first direction into the first channel 110 and come into contact with the heat jacket 200, further reducing the risk of vibration of the heat jacket 200.

[0047] Based on the above scheme, the end position of the heat jacket 200 can be further adjusted.

[0048] In some embodiments, the interior of the tube seat 121 has a first connecting section 1211, the interior of the extension tube 122 has a third connecting section 1221, and one end of the heat jacket 200 along a first direction forms a third connecting end 210, which is located in the third connecting section 1221. Since the third connecting end 210 is located in the third connecting section 1221, the sidewalls of the tube seat 121, the extension tube 122, and the horn cover 150 can jointly prevent the fluid from radially impacting the heat jacket 200, thereby reducing the vibration of the heat jacket 200 during operation.

[0049] Please refer to Figure 3 As shown, in some embodiments, the interior of the tube seat 121 has a first connecting section 1211, the interior of the extension tube 122 has a third connecting section 1221, and one end of the heat jacket 200 along the first direction forms a third connecting end 210, which is located in the second connecting section 151. Since the third connecting end 210 is located in the second connecting section 151, the sidewalls of the tube seat 121 and the extension tube 122 can jointly prevent the fluid from radially impacting the heat jacket 200, thereby reducing the vibration of the heat jacket 200 during operation. On the other hand, since the third connecting end 210 is accommodated within the second connecting section 151, the distance between the end of the horn cover 150 in the first direction and the third connecting end 210 is greater, making it less likely for fluid in the reactor to flow from one side of the horn cover 150 in the first direction into the first channel 110 and contact the heat jacket 200, further reducing the risk of vibration in the heat jacket 200.

[0050] Please refer to Figure 4 As shown, in some embodiments, the interior of the tube seat 121 has a first connecting section 1211, the interior of the extension tube 122 has a third connecting section 1221, and one end of the heat jacket 200 along the first direction forms a third connecting end 210, which is located in the first connecting section 1211. Since the third connecting end 210 is located in the first connecting section 1211, the sidewalls of the tube seat 121 can jointly prevent the fluid from radially impacting the heat jacket 200, thereby reducing the vibration of the heat jacket 200 during operation. On the other hand, since the third connecting end 210 is accommodated within the first connecting section 1211, the distance between the end of the horn cover 150 in the first direction and the third connecting end 210 is further increased, making it less likely for fluid in the reactor to flow from one side of the horn cover 150 in the first direction into the first channel 110 and contact the heat jacket 200, further reducing the risk of vibration in the heat jacket 200.

[0051] Based on the design of the tube socket unit 120 including the tube socket 121 and the extension tube 122, the shape of the first channel 110 can be further adjusted.

[0052] As a preferred option, please refer to Figure 2 , Figure 3 , Figure 4 As shown, in some embodiments, the pipe seat unit 120 includes a pipe seat 121 and an extension pipe 122. The pipe seat 121 is used to connect to the pressure vessel top cover 20 and is connected to the extension pipe 122. The pipe seat 121 includes a first connecting end 130, and the extension pipe 122 includes a second connecting end 140. A first channel 110 forms a first connecting section 1211 inside the pipe seat 121 and a third connecting section 1221 inside the extension pipe 122. The cross-sectional area of ​​the third connecting section 1221 perpendicular to the first direction is larger than the cross-sectional area of ​​the first connecting section 1211 perpendicular to the first direction.

[0053] When the tube seat 121 is connected to the pressure vessel top cover 20, it may deviate from the preset connection position due to factors such as processing errors and assembly errors. This causes the extension tube 122 connected to the tube seat 121 to also deviate from the preset position, and the horn cover 150 connected to the extension tube 122 to also deviate from the preset position. Consequently, the first channel 110 as a whole deviates from the preset position. The opening position of the third connecting section 1221 near the second connecting end 140 deviates significantly from the original preset position. The end of the drive rod 31 entering the second channel 220 section is more likely to come into contact with the inner wall of the third connecting section 1221, thereby causing wear on the drive rod 31 and the extension tube 122. During the long-term operation of the reactor, the side wall of the extension tube 122 is more likely to break due to the wear of the extension tube 122. Fluid will enter the first channel 110 from the broken position of the extension tube 122 and impact the heat jacket 200, resulting in a higher wear rate for the heat jacket 200.

[0054] In the above embodiment, since the cross-sectional area of ​​the third connecting segment 1221 perpendicular to the first direction is larger than the cross-sectional area of ​​the first connecting segment 1211 perpendicular to the first direction, the third connecting segment 1221 can provide a larger entry space perpendicular to the first direction. The end of the drive rod 31 entering the second channel 220 segment is less likely to contact the inner wall of the third connecting segment 1221, which is beneficial to improving the durability of the extension tube 122, thereby providing a more stable protection effect for the heat sleeve 200 and reducing the wear rate of the heat sleeve 200.

[0055] As another preferred option, please refer to Figure 2 , Figure 3 , Figure 4 As shown, in some embodiments, the pipe seat unit 120 includes a pipe seat 121 and an extension pipe 122. The pipe seat 121 is used to connect to the pressure vessel top cover 20 and is connected to the extension pipe 122. The pipe seat 121 includes a first connecting end 130, and the extension pipe 122 includes a second connecting end 140. A first channel 110 forms a first connecting section 1211 inside the pipe seat 121 and a third connecting section 1221 inside the extension pipe 122. The third connecting section 1221 includes a first extension section 12211 and a first guide section 12212. The first extension section 12211 is located on one side of the first guide section 12212 in a first direction, and the inner wall surface of the first guide section 12212 is in contact with the inner wall surface of the first extension section 12211. Along the first direction, the cross-sectional area of ​​the first guide section 12212 perpendicular to the first direction gradually increases, and the cross-sectional area of ​​the first extension section 12211 perpendicular to the first direction is greater than the cross-sectional area of ​​the first connecting section 1211 perpendicular to the first direction.

[0056] Through the above scheme, since the cross-sectional area of ​​the first extension section 12211 perpendicular to the first direction is larger than the cross-sectional area of ​​the first connecting section 1211 perpendicular to the first direction, the first extension section 12211 can provide a larger entry space perpendicular to the first direction. This makes it less likely for the end of the drive rod 31 entering the second channel 220 to contact the inner wall of the first extension section 12211, which helps improve the durability of the extension tube 122, thereby providing a more stable protective effect for the heat jacket 200 and reducing the wear rate of the heat jacket 200. When one end of the drive rod 31 enters the first extension section 12211 and continues to extend into the first guide section 12212, it will be guided to the first connecting section 1211 by the supporting force of the inner wall of the first guide section 12212, and finally pass through the interior of the heat jacket 200 and through the first channel 110, thus facilitating subsequent connection with other parts of the control rod drive mechanism 30.

[0057] The present invention does not limit the connection method between the tube seat 121, the extension tube 122 and the horn cover 150.

[0058] In some embodiments, one end of the extension tube 122 is integrally connected to one side of the tube seat 121 along the first direction, and the other end is integrally connected to the horn cover 150. With the above solution, the tube seat assembly 100 has stronger integrity, and the internal fluid of the pressure vessel is less likely to seep into the first channel 110 from the connection between the tube seat 121, the extension tube 122 and the horn cover 150, thereby reducing the impact of the internal fluid of the pressure vessel on the heat jacket 200 and reducing the vibration of the heat jacket 200.

[0059] In some embodiments, one end of the extension tube 122 is threaded to one side of the tube seat 121 along the first direction, and the other end is threaded to the horn cover 150. With the above solution, the tube seat 121, the extension tube 122 and the horn cover 150 are easier to assemble, which helps to improve the assembly efficiency of the drive rod seat 10.

[0060] Please refer to Figure 3 , Figure 4 , Figure 5 As shown, in some embodiments, one end of the extension tube 122 is sleeved on one side of the tube seat 121 along the first direction, and the other end is sleeved on the horn cover 150. Through this arrangement, the sleeved connection between the tube seat assemblies 100 makes it less likely for the internal fluid of the pressure vessel to seep into the first channel 110 from the connection between the tube seat 121, the extension tube 122, and the horn cover 150, thereby reducing the impact of the internal fluid of the pressure vessel on the heat jacket 200 and reducing the vibration of the heat jacket 200.

[0061] Without departing from the inventive concept of the present invention, the present invention does not impose restrictions on the connection method between the tube seat 121, the extension tube 122 and the horn cover 150.

[0062] Taking the connection between pipe socket 121 and extension pipe 122 as an example, please refer to... Figure 2 , Figure 3 As shown, in some embodiments, the tube seat 121 includes a tube seat body 1212 and a first sleeve portion 1213 connected together. The tube seat body 1212 includes a first connecting end 130, and the first sleeve portion 1213 is connected to one end of the tube seat body 1212 in a first direction. The extension tube 122 includes an extension tube body 1222 and a second sleeve portion 1223, and the second sleeve portion 1223 is connected to one end of the extension tube body 1222 in the opposite direction in the first direction. The first sleeve portion 1213 is sleeved with the second sleeve portion 1223 to connect the second connecting segment 151 and the third connecting segment 1221.

[0063] Based on the above plan, please refer to the following further information. Figure 2As shown, in some embodiments, the heat jacket 200 includes a third connecting end 210, which is located on one side in the first direction and is located in the second connecting section 151 or the third connecting section 1221. The first sleeve portion 1213 is sleeved on the outside of the second sleeve portion 1223. Since the first sleeve portion 1213 is sleeved on the outside of the second sleeve portion 1223, when the internal fluid of the pressure vessel accidentally flows into the first channel 110 through the sleeve position of the extension tube 122 and the tube seat 121, it will flow into the opposite position closer to the first direction and impact the part of the heat jacket 200 closer to the opposite position of the first direction. The vibration amplitude of the heat jacket 200 caused by the fluid impact is smaller, and it is less prone to wear, resulting in a lower wear rate of the heat jacket 200.

[0064] On the other hand, the reactor will have a water outlet assembly 40 located near the side wall. The fluid ejected from the water outlet assembly 40 through the water outlet 41 will flow along the inner wall of the reaction vessel. Since the first sleeve 1213 is sleeved on the outside of the second sleeve 1223, the outer joint formed by the sleeve of the pipe seat 121 and the extension pipe 122 is far away from the inner wall of the pressure vessel. The fluid flowing along the inner wall of the pressure vessel is less likely to enter the first channel 110 from the joint, and the heat jacket 200 is less prone to wear, resulting in a lower wear rate.

[0065] Without departing from the inventive concept of this invention, those skilled in the art can make further improvements to the structure of the heat jacket 200.

[0066] As a preferred option, please refer to Figure 3 As shown, in some embodiments, the tube assembly 100 includes a first connecting end 130 and a second connecting end 140. The first connecting end 130 is used to connect a control rod drive mechanism. The heat sleeve 200 has a second channel 220 and also includes a sleeve body 230 and a guide portion 240. The guide portion 240 is connected to one side of the sleeve body 230 in a first direction; the first direction is from the first connecting end 130 to the second connecting end 140. The second channel 220 is used to accommodate the drive rod 31 and forms a fourth connecting segment 231 inside the sleeve body 230 and a second guide segment 241 inside the guide portion 240; along the first direction, the cross-sectional area of ​​the second guide segment 241 perpendicular to the first direction gradually increases along the first direction.

[0067] With the above scheme, the second channel 220 has a larger accommodating space on the side closer to the first direction, making it easier for the end of the drive rod 31 to enter the second guide section 241, reducing the possibility of the end of the drive rod 31 abutting against the heat sleeve 200 in the first direction; and when it continues to extend into the fourth connecting section 231 in the reverse direction of the first direction, it is supported by the inner wall of the second guide section 241, making it easier for the end of the drive rod 31 to enter and pass through the fourth connecting section 231, and finally pass through the first channel 110, which facilitates subsequent connection with other parts of the control rod drive mechanism 30.

[0068] Please refer to Figure 2 , Figure 3 , Figure 5 As shown, in some embodiments, the second guide segment 241, the first guide segment 12212, and the second channel segment 220 are arranged sequentially along the first direction. With this arrangement, when the end of the drive rod 31 enters the first channel 110 in the reverse direction of the first direction, it is guided sequentially by the second guide segment 241, the first guide segment 12212, and the second channel segment 220, making it easier to pass through the drive rod seat 10 and facilitating subsequent connection with other parts of the control rod drive mechanism 30.

[0069] The present invention also proposes a reactor comprising a pressure vessel top cover 20, a water outlet assembly 40, and a drive rod seat 10 as described in any of the above embodiments.

[0070] The pressure vessel top cover 20 of the reactor of the present invention has a receiving cavity 21 for containing fluid; a portion of the tube seat assembly 100 is located outside the receiving cavity 21 and can be connected to the control rod drive mechanism 30, while a portion of the tube seat assembly 100 is inserted into the receiving cavity 21. This design allows the first channel 110 of the tube seat assembly 100 to connect the receiving cavity 21 with the external space, enabling the control rod of the control rod drive mechanism 30 located outside the receiving cavity 21 to enter the receiving cavity 21 through the first channel 110. When controlling the reactor process, the control rod drive mechanism 30 can enter and exit the internal space of the pressure vessel by controlling the drive rod 31 to control the reactor reaction process.

[0071] The water outlet assembly 40 in the reactor of the present invention has a water outlet 41, which is connected to the containment cavity 21 and is used to spray fluid into the containment cavity 21. The water outlet assembly 40 is used to promote the circulation of internal fluids in the reactor, thereby promoting the cooling of the pressure vessel top cover 20. The fluid sprayed from the water outlet 41 can flow along the inner wall of the containment cavity 21, and the fluid absorbs the heat of the pressure vessel top cover 20, thereby reducing the temperature of the pressure vessel top cover 20.

[0072] Since the heat sleeve 200 of the present invention is accommodated in the first channel 110, the side wall of the tube seat assembly 100 can prevent the fluid flowing along the inner wall of the accommodating cavity 21 from impacting the heat sleeve 200, thereby reducing the vibration of the heat sleeve 200 during operation, making the heat sleeve 200 less prone to wear, reducing the wear rate, and extending the service life of the heat sleeve 200, which is beneficial to reducing maintenance costs.

[0073] Further, please refer to Figure 1 , Figure 2 , Figure 3 As shown, in some embodiments, the tube seat assembly 100 includes a tube seat 121, which is inserted into the pressure vessel top cover 20 and into the receiving cavity 21. The circumferential sidewall of the tube seat 121 is welded to the inner wall of the pressure vessel top cover 20, and the heat sleeve 200 is inserted into the interior of the receiving cavity 21.

[0074] During actual operation, the internal fluid of the pressure vessel will also fill the first channel 110. In the reverse direction of the first direction, the fluid temperature of the first channel 110 will gradually decrease as it moves away from the receiving cavity 21. The fluid temperature in the reverse direction of the heat jacket 200 is lower than the fluid temperature in the receiving cavity 21. When the drive rod 31 withdraws from the receiving cavity 21, the pressure exerted by the fluid in the receiving cavity 21 on the heat jacket 200 decreases. The heat jacket 200 re-closes the channel formed by the inner wall of the first channel 110 and the heat jacket 200. The fluid in the reverse direction of the heat jacket 200 flows back into the receiving cavity 21 through the interior of the heat jacket 200. Since the heat jacket 200 in the above embodiment is inserted into the interior of the receiving cavity 21, the heat jacket 200 can prevent the fluid flowing towards the receiving cavity 21 from directly flowing through the part of the pipe seat 121 welded to the top cover 20 of the pressure vessel, reducing the thermal fatigue generated by the weld 50.

[0075] Further, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, in some embodiments, the reactor includes multiple control rod drive mechanisms 30 and multiple drive rod seats 10. Each seat assembly 100 includes a seat 121 and a horn cover 150. A portion of each seat 121 is located outside the receiving cavity 21 and can be connected to the control rod drive mechanism 30. Another portion of each seat 121 is inserted into the receiving cavity 21 and connected to the horn cover 150. The circumferential sidewall of each seat 121 is welded to the inner wall of the pressure vessel top cover 20. Along the direction in which the seat 121 is inserted into the receiving cavity 21, the end of each seat 121 is equidistant from the inner wall surface of the receiving cavity 21.

[0076] Since the distance between the end of each tube seat 121 and the inner wall of the receiving cavity 21 is the same, when multiple tube seats 121 are connected to the same pressure vessel top cover 20, the degree of offset between the end of each tube seat 121 and the preset position can be controlled within a specific range, reducing the risk of wear on the first channel 110 caused by excessive offset of the end of the tube seat 121, and ensuring the protective effect of the tube seat assembly 100 on the drive rod 31.

[0077] Further, please refer to Figure 1 As shown, in some embodiments, the inner wall of the receiving cavity 21 is curved, and each horn cover 150 has the same height; each drive rod seat 10 also includes an extension tube 122, and each tube seat 121 is connected to the horn cover 150 through the extension tube 122. Through the above scheme, the height position of each horn cover 150 is kept consistent through extension tubes 122 of different lengths, which helps to keep the distance between the horn cover 150 and the control rod guide cylinder 60 the same, thereby making the vibration experienced by each drive rod 31 accommodated in the first channel 110 smaller.

[0078] It should be understood that when connecting the tube seat 121 and the horn cover 150 via the extension tube 122, those skilled in the art can adjust the structure of the drive rod seat 10 to ensure the protective effect of the tube seat assembly 100 on the drive rod 31. In some embodiments, the inner diameter of the extension tube 122 is larger than the inner diameter of the tube seat 121, so that the interior of the extension tube 122 can provide a larger entry space for the drive rod 31 in the radial direction, thereby reducing the wear caused by the drive rod 31 on the inner wall of the extension tube 122. In some embodiments, when connecting the tube seat 121 and the extension tube 122, the operator can adjust the connection angle between the extension tube 122 and the tube seat 121 according to the offset of the second connection end 140, so that the extension tube 122 is offset relative to the tube seat 121 in the opposite direction of the offset direction of the tube seat 121, thereby avoiding interference between the extension tube 122 and the drive rod 31 and reducing the wear caused by the drive rod 31 on the inner wall of the extension tube 122.

[0079] Please refer to Figure 1 As shown, in some embodiments, the reactor includes a plurality of drive rod seats 10, all of which are connected to the pressure vessel top cover 20 and arranged along a second direction, which is perpendicular to the first direction (i.e., the second direction is perpendicular to the first direction). Figure 1 (In the left and right direction), the outlet 41 is located on one side of the multiple drive rod seats 10 in the second direction. With the above solution, the drive rod seat 10 close to the outlet 41 in the second direction can block the fluid, reduce the impact of the fluid ejected from the outlet 41 on the drive rod seat 10 far away from the outlet 41, and thus provide better protection for the heat jacket 200.

[0080] It should be noted that, based on the above scheme, those skilled in the art can also set multiple drive rod seats 10 in the third direction, with the first direction and the second direction being perpendicular to each other in the third direction.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A drive rod holder, characterized in that, include: A tube seat assembly for connecting the pressure vessel top cover and the control rod drive mechanism, wherein the tube seat assembly has a first channel inside; A heat-insulating sleeve, internally for the drive rod to pass through, is housed within the first channel.

2. The drive rod holder according to claim 1, characterized in that, The tube socket assembly includes a tube socket unit and a horn cover. The tube socket unit includes a first connecting end and a second connecting end. The first connecting end is used to connect to the control rod drive mechanism, and the second connecting end is connected to the horn cover. The first channel has a second connecting section inside the horn cover. The cross-sectional area of ​​the second connecting section perpendicular to the first direction gradually increases along the first direction. The first direction is the direction from the first connecting end to the second connecting end.

3. The drive rod holder according to claim 2, characterized in that, The pipe seat unit further includes a pipe seat and an extension pipe. The pipe seat is used to connect to the top cover of the pressure vessel and is connected to the extension pipe. The pipe seat includes a first connecting end, and the extension pipe includes a second connecting end. Alternatively, the tube seat unit may further include a tube seat for connecting to the pressure vessel top cover, and include a first connecting end and a second connecting end.

4. The drive rod holder according to claim 2, characterized in that, The tube seat unit includes a tube seat and an extension tube. The tube seat is used to connect to the top cover of the pressure vessel and is connected to the extension tube. The tube seat includes a first connecting end, and the extension tube includes a second connecting end. The first channel has a first connecting section inside the tube seat and a third connecting section inside the extension tube. One end of the heat-shrinking tube along the first direction forms a third connecting end, which is located in the first connecting section, the second connecting section, or the third connecting section. Alternatively, the tube seat unit includes a tube seat for connecting the pressure vessel top cover, and includes a first connecting end and a second connecting end; the first channel has a first connecting section inside the tube seat, and one end of the heat jacket along the first direction forms a third connecting end, and the third connecting end is accommodated within the first connecting section or the second connecting section.

5. The drive rod holder according to claim 1, characterized in that, The tube seat assembly includes a first connecting end and a second connecting end, wherein the first connecting end is used to connect to the control rod drive mechanism. The drive rod seat includes a horn cover, which is connected to one side of the heat jacket in a first direction. The first channel has a second connecting section inside the horn cover, and the cross-sectional area of ​​the second connecting section perpendicular to the first direction gradually increases along the first direction. The first direction is the direction from the first connecting end to the second connecting end.

6. The drive rod holder according to claim 2, characterized in that, The tube seat unit further includes a tube seat and an extension tube. The tube seat is used to connect to the top cover of the pressure vessel and is connected to the extension tube. The tube seat includes a first connecting end, and the extension tube includes a second connecting end. The first channel has a first connecting section inside the tube seat and a third connecting section inside the extension tube. The cross-sectional area of ​​the third connecting segment perpendicular to the first direction is greater than the cross-sectional area of ​​the first connecting segment perpendicular to the first direction. Alternatively, the third connecting segment includes a first extension segment and a first guiding segment, the first extension segment being located on one side of the first guiding segment in the first direction, and the inner wall surface of the first guiding segment being connected to the inner wall surface of the first extension segment; along the first direction, the cross-sectional area of ​​the first guiding segment perpendicular to the first direction gradually increases, and the cross-sectional area of ​​the first extension segment perpendicular to the first direction is greater than the cross-sectional area of ​​the first connecting segment perpendicular to the first direction.

7. The drive rod holder according to claim 2, characterized in that, The tube seat unit further includes a tube seat and an extension tube. The tube seat is used to connect to the top cover of the pressure vessel and is connected to the extension tube. The tube seat includes a first connecting end, and the extension tube includes a second connecting end. The first channel has a first connecting section inside the tube seat and a third connecting section inside the extension tube. The pipe seat includes a pipe seat body and a first sleeve portion connected together. The pipe seat body includes a first connecting end, and the first sleeve portion is connected to one end of the pipe seat body in the first direction. The extension pipe includes an extension pipe body and a second sleeve portion, and the second sleeve portion is connected to one end of the extension pipe body in the opposite direction from the first direction. The first sleeve portion and the second sleeve portion are sleeved together to connect the second connecting segment and the third connecting segment. The heat sleeve includes a third connecting end, which is located on one side in the first direction and is located in the second connecting segment or the third connecting segment; the first sleeve portion is sleeved on the outside of the second sleeve portion.

8. The drive rod holder according to claim 2, characterized in that, The tube socket unit also includes a tube socket and an extension tube; One end of the extension tube is integrally connected to one side of the tube seat along the first direction, and the other end is integrally connected to the horn cover. Alternatively, one end of the extension tube is threaded to one side of the tube seat along the first direction, and the other end is threaded to the horn cover; Alternatively, one end of the extension tube is sleeved on one side of the tube seat along the first direction, and the other end is sleeved on the horn cover.

9. The drive rod holder according to claim 1, characterized in that, The tube assembly includes a first connecting end and a second connecting end. The first connecting end is used to connect to a control rod drive mechanism. The heat sleeve has a second channel and also includes a sleeve body and a flow guide. The flow guide is connected to one side of the sleeve body in a first direction. The first direction is the direction from the first connecting end to the second connecting end. The second channel is used to accommodate the drive rod and has a fourth connecting section inside the sleeve body and a second guiding section inside the flow guide; along the first direction, the cross-sectional area of ​​the second guiding section perpendicular to the first direction gradually increases along the first direction.

10. A reactor, characterized in that, include: Drive rod seat as described in any one of claims 1 to 9; The pressure vessel top cover has a receiving cavity for containing fluid; a portion of the tube seat assembly is located outside the receiving cavity and is connectable to the control rod drive mechanism, while a portion of the tube seat assembly is inserted into the receiving cavity. A water outlet assembly has a water outlet connected to the receiving cavity and used to spray the fluid into the receiving cavity.

11. The reactor according to claim 10, characterized in that, The tube seat assembly includes a tube seat that is inserted into the pressure vessel top cover and into the receiving cavity. The circumferential sidewall of the tube seat is welded to the inner wall of the pressure vessel top cover, and the heat sleeve is inserted into the interior of the receiving cavity.

12. The reactor according to claim 10, characterized in that, The reactor includes multiple control rod drive mechanisms and multiple drive rod seats. Each tube seat assembly includes a tube seat and a horn cover. A portion of each tube seat is located outside the receiving cavity and can be connected to the control rod drive mechanism. Another portion of each tube seat is inserted into the receiving cavity and connected to the horn cover. The circumferential sidewall of each of the tube seats is welded to the inner wall of the pressure vessel top cover; along the direction in which the tube seat is inserted into the receiving cavity, the end of each tube seat is equidistant from the inner wall surface of the receiving cavity.

13. The reactor according to claim 12, characterized in that, The inner wall of the receiving cavity is curved, and each of the horn covers has the same height; each of the drive rod seats also includes an extension tube, and each tube seat is connected to the horn cover through the extension tube.

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