Pressure vessel of horizontal reactor

Abstract

A disclosed pressure vessel of a horizontal reactor comprises a top cover end socket assembly, a cylinder end socket assembly, a main bolt assembly and a vessel fixing and supporting assembly, the top cover end socket assembly comprises a top cover end socket, and the cylinder end socket assembly comprises a cylinder and a cylinder end socket which are connected with each other; the top cover seal head assembly and the cylinder seal head assembly are connected into a whole through the main bolt assembly to form a hollow cavity structure with the axial direction along the horizontal direction, the hollow cavity structure is used for accommodating a reactor core structure, and the container fixing and supporting assembly is located below the cylinder seal head assembly and is used for fixing the reactor core structure. And the hollow cavity structure is supported on a foundation in the horizontal reactor through the container fixing and supporting assembly. The pressure vessel provided by the invention can meet the use requirements of a horizontal reactor, and is relatively good in sealing performance and relatively high in safety.

Description

Technical Field

[0001] The invention relates to a pressure vessel, in particular to a pressure vessel for a horizontal reactor. Background Art

[0002] In order to meet the diverse energy needs, improve energy security, and promote the application of nuclear energy, the research on various reactors has also become diversified. Among them, the reactor pressure vessel (RPV) is one of the important main equipment of nuclear power plants. It is used to load the active area and all components in the reactor, and has a radiation shielding effect on the core; as a pressure boundary, it seals the high-temperature and high-pressure radioactive primary coolant and maintains its pressure; as a second barrier, it must prevent the fission products from escaping after the fuel element is damaged. The integrity of the reactor pressure vessel directly affects the safe operation of the nuclear power plant.

[0003] Reactor pressure vessels are usually designed in a vertical manner. This application relates to a horizontal reactor pressure vessel structure, the working medium is helium, and it operates at a high temperature of 500°C. In addition to meeting its own sealing requirements, it is also necessary to consider various loads under operating conditions such as operation, transportation, earthquake, and high temperature, and a special structural type is required to meet the above requirements. The design of the reactor pressure vessel should comprehensively consider the functions of horizontal loading of the in-core components, horizontal installation and operation of the control rod drive mechanism, bidirectional flow of the inlet and outlet of the coolant pipeline, and horizontal in-core support of the reactor pressure vessel.

[0004] Patent CN114334192A discloses a passive residual heat removal device for a micro-miniature horizontal reactor, and patent CN218413995U discloses a horizontal high-temperature gas-cooled reactor structure, including a reactor internal component and a pressure vessel, wherein the reactor internal component is arranged in the pressure vessel. The above prior arts lack a detailed description of the structure of the horizontal reactor pressure vessel.

[0005] In view of the above technical problems, the present invention is specially introduced. Summary of the invention

[0006] The main purpose of the present invention is to provide a pressure vessel for a horizontal reactor.

[0007] In order to achieve the above-mentioned object, the present invention proposes a pressure vessel for a horizontal reactor, comprising: a top cover head assembly, a cylinder head assembly, a main bolt assembly and a container fixing support assembly, wherein the top cover head assembly comprises a top cover head, and the cylinder head assembly comprises a cylinder and a cylinder head connected to each other.

[0008] The top cover head assembly and the cylinder head assembly are connected as a whole through the main bolt assembly to form a hollow cavity structure along the axial direction and the horizontal direction, which is used to accommodate the core structure. The container fixed support assembly is located below the cylinder head assembly, and the hollow cavity structure is supported on the foundation inside the horizontal reactor through the container fixed support assembly.

[0009] Furthermore, the top cover head assembly includes a top cover flange, which is located on the circumferential outside of the top cover head; the cylinder head assembly includes a cylinder flange, which is located on the circumferential outside of the cylinder; a plurality of main bolt holes are circumferentially arranged on the top cover flange and the cylinder flange; the main bolt assembly passes through the plurality of main bolt holes to fix the top cover flange and the cylinder flange in connection.

[0010] Furthermore, two sealing grooves are arranged at intervals along the radial direction at the connection between the top cover flange and the cylinder flange, respectively used to accommodate two metal sealing rings.

[0011] Furthermore, a sealing monitoring tube is provided at the connection between the cylinder flange and the top cover flange, and the sealing monitoring tube is connected to the position between the two sealing grooves to detect the sealing performance of the metal sealing ring in the inner groove.

[0012] Furthermore, a head shielding component is provided in the top cover head assembly along the radial direction, and two sides of the head shielding component are limited by a plurality of stoppers fixed on the top cover flange, and the head shielding component is used for shielding radiation.

[0013] Furthermore, the top cover head is provided with a temperature measuring instrument socket and a plurality of control rod drive mechanism sockets along the axial direction, and the plurality of control rod drive mechanism sockets all include a control rod drive mechanism socket flange located outside the top cover head for connecting with the control rod drive mechanism.

[0014] Furthermore, the plurality of control rod drive mechanism seats correspond to the axial position of the top cover head and the circumferential direction of the axis respectively, and the plurality of control rod drive mechanism seats located in the circumferential direction adopt an eccentricity design.

[0015] Furthermore, the cylinder head assembly also includes an outer main pipeline flange, which is connected to the axial position of the cylinder head and is used to be connected to the outer main pipeline. An inner main pipeline connected to the core structure is arranged inside the outer main pipeline flange.

[0016] Furthermore, the cylinder flange, the cylinder, the cylinder head and the outer main pipe flange are connected into an integrated structure.

[0017] Furthermore, a right-side core clamping structure is arranged in the cylinder head assembly, and the right-side core clamping structure includes a support plate and a fixed plate. A plurality of the fixed plates are circumferentially arranged on the inner side of the cylinder, and the support plate is arranged in the radial direction and its circumferential outer side cooperates with the plurality of fixed plates. A plurality of notches for passing the cooling medium are also arranged on the circumferential outer side of the support plate, and a support ring for passing the inner main pipe is arranged at the axis of the support plate.

[0018] Furthermore, the support plate is also provided with a plurality of reinforcing ribs distributed circumferentially around the outer side of the support ring and extending radially, and the reinforcing ribs vary in length along the axial direction and are used to guide the cooling medium to flow into the core structure through the notch.

[0019] Furthermore, a left-side core clamping structure is also provided in the top cover head assembly, and the left-side core clamping structure includes two baffles, a clamping spring and a support rod. A plurality of the support rods pass through the two baffles, one end of which is connected to the inner side of the top cover head, and the other end of which is connected to the core structure. A plurality of groups of the clamping springs are located between the two baffles.

[0020] Furthermore, the container fixed support assembly includes a fixed bottom plate, a fixed rib plate and a fixed web plate which are connected to each other. The fixed bottom plate is fixed to the base of the reactor by fasteners. The fixed web plate extends in a radial direction and is connected to the outer wall of the cylinder. A plurality of fixed rib plates are respectively arranged on both sides of the fixed web plate.

[0021] Furthermore, the container fixing support assembly is configured to have two elliptical fastener holes along the axial direction, and the fixing bottom plate of the container fixing support assembly close to the top cover head assembly is provided with oval fastener holes.

[0022] Furthermore, a core support assembly is provided below the core structure in the hollow cavity structure, and the core support assembly includes a support rib plate and a support connecting plate, the support rib plate is located between the support connecting plate and the inner wall of the cylinder, and the core structure is connected to the support rib plate by a binding strap.

[0023] By applying the technical solution of the present invention, at least the following beneficial effects are achieved:

[0024] 1. The pressure vessel of the present invention is provided with a top cover head assembly and a cylinder head assembly connected as a whole through a main bolt assembly, so that the pressure vessel is easy to install and disassemble, and can meet the use requirements of a horizontal reactor, with good sealing and high safety.

[0025] 2. The pressure vessel of the present invention is provided with two metal sealing rings to ensure that when the inner ring leaks, the outer ring can still provide sealing guarantee. Furthermore, by designing a sealing monitoring tube, when the inner ring leaks, the leakage can be detected by the sealing detection tube and an alarm response can be issued to remind the operation and maintenance personnel to carry out relevant maintenance or replace the metal sealing ring in time.

[0026] 3. The pressure vessel of the present invention realizes the connection between the pressure vessel and the control rod drive mechanism by designing multiple control rod drive mechanism sockets. The control rod drive mechanism socket flange has good strength and stability, provides horizontal guidance for the control rod drive mechanism, and provides a guide channel for inserting and withdrawing the control rods in the core structure, thereby ensuring the safety of reactor operation.

[0027] 4. The pressure vessel of the present invention ensures the right-side positioning of the core structure by arranging the left-side core clamping structure and the right-side core clamping structure, and can withstand the axial load under the working conditions of transportation, operation, earthquake, etc., and can also offset the influence of the axial displacement load caused by the high temperature difference during operation and the axial vibration of the core structure.

[0028] 5. The pressure vessel of the present invention is provided with a core support assembly, and the surface of the support connecting plate provides a plane reference for the installation of the core structure, which greatly improves the installation accuracy of the core structure, reduces the installation difficulty, and ensures the integrity of the core structure; at the same time, a certain gap is left between the binding strap and the support connecting plate to offset the influence of temperature difference displacement during high-temperature operation.

[0029] 6. The pressure vessel of the present invention provides positioning support for the pressure vessel by setting a vessel fixing support assembly, and further designs an elliptical fastener hole to balance the temperature difference displacement of the pressure vessel under high temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 A schematic cross-sectional view of a pressure vessel according to an embodiment is shown;

[0032] Figure 2 A schematic cross-sectional view of a top cover head assembly according to an embodiment is shown;

[0033] Figure 3 Shows Figure 2 Left view of

[0034] Figure 4 A cross-sectional schematic diagram of a cylinder head assembly according to an embodiment is shown;

[0035] Figure 5 Shows Figure 4 A local schematic diagram of the B direction;

[0036] Figure 6 A schematic diagram of a container fixing support assembly according to an embodiment is shown;

[0037] Figure 7 A schematic diagram of a core support assembly according to an embodiment is shown;

[0038] Figure 8 A schematic diagram of a strap-connected core support assembly according to one embodiment is shown.

[0039] The above drawings include the following reference numerals:

[0040] 1. Top cover head assembly; 11. Top cover flange; 12. Top cover head; 13. Temperature measuring instrument socket; 14. Control rod drive mechanism socket; 141. Control rod drive mechanism socket flange; 15. Left core clamping structure; 151. Baffle; 152. Compression spring; 153. Support rod; 16. Head shield; 161. Block; 17. Metal sealing ring; 2. Cylinder head assembly; 21. Cylinder flange; 211. Sealing detection tube; 22. Cylinder; 23. Cylinder head; 24. External Main pipeline flange; 25. Right core clamping structure; 251. Support plate; 252. Fixed plate; 253. Reinforcement rib plate; 254. Support ring; 26. Inner main pipeline; 27. Sealing detection tube; 3. Core support assembly; 31. Support rib plate; 32. Support connecting plate 4. Container fixed support assembly; 41. Fixed bottom plate; 42. Fixed rib plate; 43. Fixed belly plate; 5. Main bolt assembly; 6. Control rod drive mechanism; 61. Control rod; 7. Core structure; 8. Outer main pipeline; 9. Binding strap. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] The present invention is further described in detail below in conjunction with specific embodiments, and these embodiments cannot be understood as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the existence of a feature, but does not exclude the existence or addition of one or more other features; the orientation or position relationship indicated by the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0043] In the description, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0044] Example:

[0045] The present invention proposes a pressure vessel for a horizontal reactor, see Figure 1 , including: a top cover head assembly 1, a cylinder head assembly 2, a main bolt assembly 5 and a container fixing support assembly 4, the top cover head assembly 1 includes a top cover head 12, and the cylinder head assembly 2 includes a cylinder 22 and a cylinder head 23 that are connected to each other.

[0046] The top cover head assembly 1 and the cylinder head assembly 2 are connected as a whole by the main bolt assembly 5 to form a hollow cavity structure with the axial direction along the horizontal direction. The central axis of the cavity is in the horizontal direction, and a horizontal structure is adopted to accommodate the core structure 7. The container fixed support assembly 4 is located below the cylinder head assembly 2, and the hollow cavity structure is supported on the foundation in the horizontal reactor through the container fixed support assembly 4.

[0047] Combination Figure 2 and Figure 4 As shown, the top cover head assembly 1 includes a top cover flange 11, which is located on the circumferential outside of the top cover head 12, and the cylinder head assembly 2 includes a cylinder flange 21, which is located on the circumferential outside of the cylinder 22. A plurality of main bolt holes are circumferentially arranged on the top cover flange 11 and the cylinder flange 21, and the main bolt assembly 5 passes through the plurality of main bolt holes to fix the top cover flange 11 and the cylinder flange 21 together.

[0048] Furthermore, two sealing grooves are arranged at intervals along the radial direction at the connection between the top cover flange 11 and the cylinder flange 21, respectively used to accommodate two metal sealing rings 17. A sealing monitoring tube 27 is arranged at the connection between the cylinder flange 21 and the top cover flange 11, and the sealing monitoring tube 27 is connected to the position between the two sealing grooves to detect the sealing performance of the inner metal sealing ring 17.

[0049] Preferably, the top cover head 12 is an elliptical spherical cap, which is welded to the neck of the top cover flange 11. This design can ensure that the top cover head 12 and the top cover flange 11 are well stressed and strong at the connection, and save the space occupied by the main body as a whole. A double-pass metal sealing ring connection is adopted, so that when the inner ring leaks, the outer ring can still provide sealing guarantee. A sealing detection tube 211 is arranged between the double-pass metal sealing rings, and the sealing detection tube 211 is connected to the external leak detection system. When the inner ring leaks, the leakage can be detected by the sealing detection tube and an alarm response is issued to remind the operation and maintenance personnel to carry out relevant maintenance or replace the sealing ring in time.

[0050] Combination Figure 2 and Figure 3 As shown, a head shielding member 16 is provided in the top cover head assembly 1 along the radial direction, and both sides of the head shielding member 16 are limited by a plurality of stoppers 161 fixed on the top cover flange 11 , and the head shielding member 16 is used for shielding radiation.

[0051] Furthermore, a temperature measuring instrument socket 13 and a plurality of control rod drive mechanism sockets 14 are provided on the top cover head 12 along the axial direction. The plurality of control rod drive mechanism sockets 14 each include a control rod drive mechanism socket flange 141 located outside the top cover head 12 for connecting with the control rod drive mechanism 6.

[0052] Preferably, the plurality of control rod drive mechanism pipe seats 14 correspond to the axial position of the top cover head 12 and the circumferential direction of the axial center, respectively, and the plurality of control rod drive mechanism pipe seats 14 located in the circumferential direction adopt an eccentricity design. In this embodiment, the top cover head 12 is connected with two temperature measuring instrument pipe seats 13 and seven control rod drive mechanism pipe seats 14, wherein the flange plates of the surrounding six control rod drive mechanism pipe seat flanges 141 adopt an eccentricity structure, which is used for horizontally arranging and fixing the control rod drive mechanism.

[0053] Specifically, two temperature measuring instrument sockets 13 are connected to the external measuring instrument system by threaded connection and then welding. The control rod drive mechanism socket 14 is connected to the top cover head 12 by full penetration welding. The control rod drive mechanism socket flange 141 and the external control rod drive mechanism system are connected by flange bolt connection and double metal sealing to achieve the connection between the pressure vessel and the control rod drive mechanism 6. The flange plate of the control rod drive mechanism socket flange 141 needs to have good strength and stability to provide horizontal guidance for the control rod drive mechanism, provide a guide channel for the insertion and extraction of the control rod 61 in the core, and ensure the safety of reactor operation.

[0054] In order to improve the overall stability of the pressure vessel, a left core clamping structure 15 is also provided in the top cover head assembly 1. The left core clamping structure 15 includes two baffles 151, a compression spring 152 and a support rod 153. A plurality of support rods 153 pass through the two baffles 151, one end of which is connected to the inner side of the top cover head 12, and the other end is connected to the core structure 7. A plurality of groups of compression springs 152 are located between the two baffles 151.

[0055] Specifically, a plurality of tube holes for supporting rods 153 and guide channels for control rod drive mechanisms are opened in the middle of the baffles 151 on both sides of the compression springs 152. One side of the supporting rods 153 is connected and fixed to the top cover head 12 by welding, and a support is provided to the baffles 151 through the channels. In the middle are multiple groups of compression springs 152. The compression springs 152 are made of 718 nickel-based alloy material, which has good high-temperature performance and can meet the requirements of high temperature and high pressure. During the installation of the top cover head assembly 1, the compression springs 152 are compressed, and the baffles 151 are pushed by elastic force to compress the core structure, which can withstand axial loads in transportation, operation, earthquake and other working conditions, and can also offset the axial displacement load caused by the high temperature difference during operation and the influence of axial vibration of the core structure.

[0056] refer to Figure 4 As shown, the barrel head assembly 2 also includes an outer main pipe flange 24, which is connected to the axial center of the barrel head 23 and is used to be connected to the outer main pipe 8. An inner main pipe 26 connected to the core structure 7 is arranged inside the outer main pipe flange 24. Cold fluid helium flows in from the outer main pipe along the inner wall of the cavity, one side of the inner main pipe 26 is connected to the core structure, and the other side of the pipe is extended to deliver the hot fluid helium heated by the core structure to the steam turbine.

[0057] Preferably, the cylinder flange 21, the cylinder 22, the cylinder head 23 and the outer main pipe flange 24 are connected into an integrated structure.

[0058] In order to fix the core structure, a right-side core clamping structure 25 is arranged in the cylinder head assembly 2, and the right-side core clamping structure 25 includes a support plate 251 and a fixed plate 252. A plurality of fixed plates 252 are circumferentially arranged on the inner side of the cylinder 22, and the support plate 251 is arranged along the radial direction and its circumferential outer side cooperates with the plurality of fixed plates 252. A plurality of notches for passing the cooling medium are also arranged on the circumferential outer side of the support plate 251, and a support ring 254 for passing the inner main pipe 26 is provided at the axial center of the support plate 251.

[0059] Furthermore, the support plate 251 is provided with a plurality of reinforcing ribs 253 which are distributed circumferentially around the outer side of the support ring 254 and extend radially. The reinforcing ribs 253 vary in length along the axial direction and are used to guide the cooling medium to flow into the core structure 7 through the notch.

[0060] Specifically, combined Figure 4 and Figure 5 As shown, six fixing plates 252 are evenly fixed on the cylinder 22 in the axial direction. Accordingly, six notches are opened around the support plate 251 to leave a channel for the cold medium helium to enter the core structure. The part between the notches is connected to the fixing plate 252 to play a positioning role. Twelve reinforcing rib plates 253 are evenly distributed on the support plate 251. The support plate 251, the reinforcing rib plate 253 and the support ring 254 form a combination. Through the support positioning of the fixing plate 252, the right side positioning of the core structure is ensured, and the axial load and axial temperature difference load brought by the core structure under the conditions of transportation and operation are carried.

[0061] refer to Figure 1 and Figure 6 As shown, the container fixed support assembly 4 includes a fixed bottom plate 41, a fixed rib plate 42 and a fixed web 43 which are interconnected. The fixed bottom plate 41 is fixed to the foundation of the reactor by fasteners. The fixed web 43 extends in the radial direction and is connected to the outer wall of the cylinder 22. A plurality of fixed rib plates 42 are respectively arranged on both sides of the fixed web 43.

[0062] Specifically, the stability of the pressure vessel is achieved by the container fixing support assembly 4. In this embodiment, the pressure vessel is fixed to the foundation by anchor bolts through the container fixing support assembly 4. The container fixing support assembly 4 is divided into two parts. The difference between the two parts is that the openings of the fixed bottom plate 41 are different. One is a round hole and the other is an elliptical hole. The container fixing support assembly 4 with a round hole is located on the main pipeline side and is connected to the main pipeline to play a fastening and positioning function. The oblong hole of the container fixing support assembly 4 with an elliptical hole is used to balance the temperature difference displacement of the device under high temperature conditions. The fixed web 43 is a saddle-type support for a heavy-duty horizontal container with a large wrap angle of 150°. The fixed web 43 and the container cylinder 22 are welded by full penetration. The support is provided with 16 rib plates to increase the strength of the support, and is fixedly connected to the factory floor foundation through the anchor bolts on the support bottom plate.

[0063] Combination Figure 1 , Figure 7 and Figure 8 As shown, a core support assembly 3 is further provided below the core structure 7 in the hollow cavity structure, and the positioning point of the core structure 7 is located at the core support assembly 3 on the inner wall of the cylinder 22. The core support assembly 3 includes a support rib plate 31 and a support connecting plate 32, the support rib plate 31 is located between the support connecting plate 32 and the inner wall of the cylinder 22, and the core structure 7 is connected to the support rib plate 31 by a binding band 9.

[0064] Specifically, there are two supporting ribs 31 and one supporting connecting plate 32, which are arranged on the upper surface of the bottom of the cylinder 22 along the length direction of the cylinder, and the core structure is fixed on the supporting ribs 31 by means of binding straps. The core support assembly 3 is an integral internal support structure of the container. When installing the binding strap core structure, the core structure with the binding strap is pushed from the left side of the container to the right side along the supporting connecting plate 32 to achieve the installation of the core structure. The upper surface of the supporting connecting plate 32 requires a high level. The upper surface of the integral supporting structure provides a plane reference for the installation of the core structure, which greatly improves the installation accuracy of the core structure, reduces the installation difficulty, and ensures the integrity of the core structure. At the same time, a certain gap is left between the binding strap and the supporting connecting plate 32 to offset the influence of temperature difference displacement during high-temperature operation.

[0065] In order to stabilize the core structure in the pressure vessel, please continue to refer to Figure 1 , 2 , 4, 7, in this embodiment, the left core clamping structure 15, the right core clamping structure 25 and the core supporting assembly 3 are fixed in the device by the binding straps of the core structure itself, so as to contain the core structure, and the cold and hot fluid helium circulate in the closed cavity of the device.

[0066] The circulation process of the fluid helium in the device will be specifically described below: the cold fluid helium enters the barrel head assembly 2 along the cavity from between the inner and outer main pipelines, enters from between the inner main pipeline 26 and the outer main pipeline flange 24, flows along the inner wall side of the barrel head 23, the barrel 22, and the barrel flange 21 in sequence to the side of the top cover head assembly 1, enters the core structure for heating, flows out through the inner main pipeline 26, enters the turbine through the inner wall pipe of the main pipeline, returns between the inner and outer main pipelines after cooling, and then enters the device for a reciprocating cycle.

[0067] The pressure-bearing body of the device described above is made of 316H, the main bolt assembly 5 is made of 718 nickel-based alloy, the design pressure is 3.3MPa, and the medium is helium. They all have high high-temperature performance and radiation resistance.

[0068] In summary, the horizontal reactor pressure vessel device has high safety and can meet the use requirements of horizontal reactor pressure vessels in nuclear power plants.

[0069] In summary, from the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0070] 1. The pressure vessel of the present invention is provided with a top cover head assembly and a cylinder head assembly connected as a whole through a main bolt assembly, so that the pressure vessel is easy to install and disassemble, and can meet the use requirements of a horizontal reactor, with good sealing and high safety.

[0071] 2. The pressure vessel of the present invention is provided with two metal sealing rings to ensure that when the inner ring leaks, the outer ring can still provide sealing guarantee. Furthermore, by designing a sealing monitoring tube, when the inner ring leaks, the leakage can be detected by the sealing detection tube and an alarm response can be issued to remind the operation and maintenance personnel to carry out relevant maintenance or replace the metal sealing ring in time.

[0072] 3. The pressure vessel of the present invention realizes the connection between the pressure vessel and the control rod drive mechanism by designing multiple control rod drive mechanism sockets. The control rod drive mechanism socket flange has good strength and stability, provides horizontal guidance for the control rod drive mechanism, and provides a guide channel for inserting and withdrawing the control rods in the core structure, thereby ensuring the safety of reactor operation.

[0073] 4. The pressure vessel of the present invention ensures the right-side positioning of the core structure by arranging the left-side core clamping structure and the right-side core clamping structure, and can withstand the axial load under the working conditions of transportation, operation, earthquake, etc., and can also offset the influence of the axial displacement load caused by the high temperature difference during operation and the axial vibration of the core structure.

[0074] 5. The pressure vessel of the present invention is provided with a core support assembly, and the surface of the support connecting plate provides a plane reference for the installation of the core structure, which greatly improves the installation accuracy of the core structure, reduces the installation difficulty, and ensures the integrity of the core structure; at the same time, a certain gap is left between the binding strap and the support connecting plate to offset the influence of temperature difference displacement during high-temperature operation.

[0075] 6. The pressure vessel of the present invention provides positioning support for the pressure vessel by setting a vessel fixing support assembly, and further designs an elliptical fastener hole to balance the temperature difference displacement of the pressure vessel under high temperature conditions.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure vessel for a horizontal reactor, characterized in that: include: A top cover head assembly (1), a cylinder head assembly (2), a main bolt assembly (5) and a container fixing support assembly (4), wherein the top cover head assembly (1) comprises a top cover head (12), and the cylinder head assembly (2) comprises a cylinder (22) and a cylinder head (23) connected to each other. The top cover head assembly (1) and the cylinder head assembly (2) are connected as a whole via the main bolt assembly (5) to form a hollow cavity structure with the axial direction along the horizontal direction, which is used to accommodate the core structure (7); the container fixing support assembly (4) is located below the cylinder head assembly (2); and the hollow cavity structure is supported on a foundation inside the horizontal reactor via the container fixing support assembly (4).

2. The pressure vessel according to claim 1, characterized in that: The top cover head assembly (1) comprises a top cover flange (11), wherein the top cover flange (11) is located on the circumferential outer side of the top cover head (12); the cylinder head assembly (2) comprises a cylinder flange (21), wherein the cylinder flange (21) is located on the circumferential outer side of the cylinder (22); a plurality of main bolt holes are circumferentially arranged on the top cover flange (11) and the cylinder flange (21); and the main bolt assembly (5) passes through the plurality of main bolt holes to fix the top cover flange (11) and the cylinder flange (21) in connection.

3. The pressure vessel according to claim 2, characterized in that: Two sealing grooves are arranged at intervals along the radial direction at the connection between the top cover flange (11) and the cylinder flange (21), respectively used to accommodate two metal sealing rings (17).

4. The pressure vessel according to claim 3, characterized in that: A sealing monitoring tube (27) is provided at the connection between the cylinder flange (21) and the top cover flange (11), and the sealing monitoring tube (27) is connected to the position between the two sealing grooves to detect the sealing performance of the metal sealing ring (17) in the inner groove.

5. The pressure vessel according to any one of claims 2 to 4, characterized in that: A head shielding component (16) is arranged in the radial direction inside the top cover head assembly (1), and two sides of the head shielding component (16) are limited by a plurality of stoppers (161) fixed on the top cover flange (11), and the head shielding component (16) is used to shield radiation.

6. The pressure vessel according to claim 1, characterized in that: The top cover head (12) is provided with a temperature measuring instrument pipe seat (13) and a plurality of control rod drive mechanism pipe seats (14) along the axial direction. The plurality of control rod drive mechanism pipe seats (14) each include a control rod drive mechanism pipe seat flange (14) located outside the top cover head (12) and used for connecting to the control rod drive mechanism (6).

7. The pressure vessel according to claim 6, characterized in that: The plurality of control rod drive mechanism pipe seats (14) respectively correspond to the axial position of the top cover head (12) and the circumferential direction of the axial center, and the plurality of control rod drive mechanism pipe seats (14) located in the circumferential direction adopt an eccentricity design.

8. The pressure vessel according to claim 2, characterized in that: The cylinder head assembly (2) further comprises an outer main pipeline flange (24), which is connected to the axial center of the cylinder head (23) and is used to be connected to the outer main pipeline (8). An inner main pipeline (26) connected to the core structure (7) is arranged inside the outer main pipeline flange (24).

9. The pressure vessel according to claim 8, characterized in that: The cylinder flange (21), the cylinder (22), the cylinder head (23) and the outer main pipe flange (24) are connected to form an integrated structure.

10. The pressure vessel according to claim 8, characterized in that: A right core clamping structure (25) is arranged inside the cylinder head assembly (2), and the right core clamping structure (25) comprises a support plate (251) and a fixing plate (252). A plurality of the fixing plates (252) are arranged circumferentially on the inner side of the cylinder (22). The support plate (251) is arranged in a radial direction and its circumferential outer side cooperates with the plurality of fixing plates (252). A plurality of notches for passing cooling medium are also arranged on the circumferential outer side of the support plate (251). A support ring (254) for passing the inner main pipe (26) is arranged at the axis of the support plate (251).

11. The pressure vessel according to claim 10, characterized in that: The support plate (251) is also provided with a plurality of reinforcing rib plates (253) which are distributed circumferentially around the outer side of the support ring (254) and extend radially. The reinforcing rib plates (253) vary in length along the axial direction and are used to guide the cooling medium to flow into the core structure (7) through the notch.

12. The pressure vessel according to claim 6, characterized in that: A left core clamping structure (15) is also provided in the top cover head assembly (1), and the left core clamping structure (15) comprises two baffles (151), a clamping spring (152) and a support rod (153). A plurality of the support rods (153) pass through the two baffles (151), one end of which is connected to the inner side of the top cover head (12) and the other end of which is connected to the core structure (7). A plurality of groups of the clamping springs (152) are located between the two baffles (151).

13. The pressure vessel according to claim 1, characterized in that: The container fixed support assembly (4) comprises a fixed bottom plate (41), a fixed rib plate (42) and a fixed web plate (43) which are connected to each other. The fixed bottom plate (41) is fixed to the base of the reactor by fasteners. The fixed web plate (43) extends in a radial direction and is connected to the outer wall of the cylinder (22). A plurality of fixed rib plates (42) are respectively arranged on both sides of the fixed web plate (43).

14. The pressure vessel according to claim 13, characterized in that: The container fixing support assembly (4) is arranged in two portions along the axial direction, and an elliptical fastener hole is provided on the fixing bottom plate (41) of the container fixing support assembly (4) close to the top cover head assembly (1).

15. The pressure vessel according to claim 1, characterized in that: A core support assembly (3) is also provided below the core structure (7) in the hollow cavity structure. The core support assembly (3) comprises a support rib plate (31) and a support connecting plate (32). The support rib plate (31) is located between the support connecting plate (32) and the inner wall of the cylinder (22). The core structure (7) is connected to the support rib plate (31) via a binding strap (9).

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