Reactor and sealing device thereof

Abstract

The embodiment of the invention relates to the field of sealing devices of nuclear reactors, in particular to a reactor and a sealing device thereof, and the sealing device is used for sealing an elevator tube socket on a cock of the reactor. A movable guide pipe lifting mechanism is arranged in the elevator pipe base and used for driving a pull rod connected with the movable guide pipe to ascend and descend. The sealing device comprises a connecting assembly and a sealing assembly. The pull rod connecting piece and the driving connecting piece are formed at the two ends of the rod piece, the pull rod connecting piece is used for being connected with a pull rod, and the driving connecting piece is used for being connected with a movable guide pipe lifting mechanism; the sealing assembly is arranged on the rod piece and used for sealing the elevator pipe base and the rod piece when the movable guide pipe lifting mechanism drives the rod piece to descend to the overhaul position. According to the sealing device provided by the embodiment of the invention, the sealing inside the reactor container can be ensured when the movable guide pipe lifting mechanism is overhauled, and radioactive gas inside the reactor container is prevented from leaking.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of sealing devices for nuclear reactors, and in particular to a reactor and a sealing device thereof. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] The cock is installed on the reactor vessel, and a through hole connected to the inside of the reactor vessel is provided on the cock, and the through hole is used to install the hoist pipe seat. The hoist pipe seat is provided with a moving guide tube lifting mechanism, which is used to drive the pull rod and the moving guide tube in the reactor vessel to move up and down, thereby driving the control rod to move up and down.

[0004] The hoist pipe seat can isolate the interior of the reactor container from the outside, so that the radioactive gas inside the reactor container will not leak out. Summary of the invention

[0005] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0006] During use, the dynamic guide tube lifting mechanism in the lifting machine pipe seat may be damaged. When the dynamic guide tube lifting mechanism is damaged, it is necessary to inspect and disassemble the dynamic guide tube lifting mechanism. However, when inspecting and disassembling the dynamic guide tube lifting mechanism, the radioactive gas inside the stack container may leak to the outside through the through hole on the cock, causing radioactive contamination.

[0007] In the related art, the situation that the moving guide tube lifting mechanism needs to be repaired is not considered, and therefore, how to ensure the sealing inside the stack container when the moving guide tube lifting mechanism is repaired is not considered.

[0008] In view of the above problems, embodiments of the present application provide a reactor and a sealing device thereof.

[0009] In the first aspect, an embodiment of the present application provides a sealing device for sealing a lifter pipe seat on a reactor's cock, wherein a moving guide tube lifting mechanism is provided in the lifter pipe seat, and the moving guide tube lifting mechanism is used to drive the pull rod connected to the moving guide tube to rise and fall. The sealing device provided by an embodiment of the present application includes a connecting assembly and a sealing assembly. The connecting assembly includes a rod and a pull rod connector and a driving connector formed at both ends of the rod, the pull rod connector is used to connect to the pull rod, and the driving connector is used to connect to the moving guide tube lifting mechanism; the sealing assembly is provided on the rod, and is used to seal between the lifter pipe seat and the rod when the moving guide tube lifting mechanism drives the rod to descend to the maintenance position.

[0010] In a second aspect, an embodiment of the present application provides a reactor, comprising: a stack container and a valve installed on the stack container; a lifting machine pipe seat installed on the valve; a pull rod and a moving guide tube connected to the pull rod; a moving guide tube lifting mechanism installed on the lifting machine pipe seat, the moving guide tube lifting mechanism being used to drive the pull rod to move up and down, thereby driving the moving guide tube to move up and down; the reactor also includes a sealing device according to the first aspect of the present application, which is installed on the lifting machine pipe seat and is used to seal the lifting machine pipe seat when the moving guide tube lifting mechanism drives the pull rod to descend to the maintenance position.

[0011] The sealing device provided in the embodiment of the present application can seal the lifting machine pipe seat and the rod through the sealing component when the moving guide tube lifting mechanism drives the rod to descend to the maintenance position, and can ensure the sealing of the inside of the stack container when the moving guide tube lifting mechanism is under maintenance to prevent leakage of radioactive gas inside the stack container. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0013] Figure 1 It is a schematic diagram of the structure of the sealing device provided in the embodiment of the present application.

[0014] Figure 2 It is a schematic diagram of the structure of the sealing device provided in an embodiment of the present application after being installed on the lifting machine pipe seat, wherein the dynamic guide tube lifting mechanism does not drive the rod to descend to the maintenance position.

[0015] Figure 3 It is a schematic diagram of the structure of the sealing device provided in an embodiment of the present application after being installed on a lifting machine pipe seat, wherein the dynamic pipe lifting mechanism drives the rod to descend to the maintenance position.

[0016] Figure 4 yes Figure 1 A schematic structural diagram of a sealing assembly of a sealing device is shown.

[0017] Figure 5 yes Figure 4A schematic structural diagram of an elastic seal of a sealing assembly is shown.

[0018] Figure 6 yes Figure 1 A schematic diagram of a structure consisting of a first rod member and a pull rod connecting member of a sealing device is shown.

[0019] Figure 7 yes Figure 6 A schematic cross-sectional view of the structure is shown.

[0020] Description of reference numerals:

[0021] 100. Sealing device;

[0022] 10. Connecting assembly; 11. Rod; 111. First rod; 1111. Limiting portion; 1112. Circumferential limiting portion; 1113. Mounting groove; 112. Second rod; 113. Threaded connector; 12. Tie rod connector; 121. Connecting groove; 122. Matching hole; 123. Positioning pin; 13. Driving connector; 101. Locking nut; 102. Locking matching member;

[0023] 20. Sealing assembly; 21. First sealing member; 22. Second sealing member; 221. Elastic sealing member; 2210. Circular arc surface; 2211. First part; 22110. V-shaped groove; 2212. Second part; 222. Sealing member retainer; 2220. Retaining mounting groove; 2221. Groove; 223. Retaining fitting member; 23. End fixing member; 231. Flange; 232. End fixing nut; 24. Elastic member; 25. Anti-loosening member; 26. Adjusting member;

[0024] 200, cock; 300, hoist pipe seat; 310, pipe seat passage; 320, pipe seat mounting groove; 330, pipe seat through hole; 340, middle passage; 350, cone surface;

[0025] 400, dynamic guide tube lifting mechanism; 410, housing; 420, rack; 500, pull rod.

[0026] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0027] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0028] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present application are shown in the accompanying drawings, while other details that are not very relevant to the present application are omitted.

[0029] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the present application provides a sealing device 100 for sealing a lifting machine pipe seat 300 on a reactor plug 200. A moving guide tube lifting mechanism 400 is provided in the lifting machine pipe seat 300. The moving guide tube lifting mechanism 400 is used to drive a pull rod 500 connected to the moving guide tube to rise and fall.

[0030] The sealing device 100 provided in the embodiment of the present application may include a connection assembly 10 and a sealing assembly 20. The connection assembly 10 includes a rod 11 and a pull rod connection member 12 and a drive connection member 13 formed at both ends of the rod 11, the pull rod connection member 12 is used to connect with the pull rod 500, and the drive connection member 13 is used to connect with the dynamic duct lifting mechanism 400; the sealing assembly 20 is arranged on the rod 11, and is used to seal between the lifting machine pipe seat 300 and the rod 11 when the dynamic duct lifting mechanism 400 drives the rod 11 to descend to the maintenance position.

[0031] The sealing device 100 provided in the embodiment of the present application can seal the space between the lifting machine pipe seat 300 and the rod 11 through the sealing assembly 20 when the dynamic duct lifting mechanism 400 drives the rod 11 to descend to the maintenance position, thereby ensuring the sealing of the interior of the stack container when the dynamic duct lifting mechanism 400 is under maintenance and preventing leakage of radioactive gas inside the stack container.

[0032] In some embodiments, after the dynamic duct lifting mechanism 400 is overhauled, the rod 11 can be driven to rise by the dynamic duct lifting mechanism 400. When the rod 11 leaves the overhaul position, the sealing assembly 20 cannot seal between the lifting machine pipe seat 300 and the rod 11.

[0033] It is easy to understand that the dynamic duct lifting mechanism 400 can drive the pull rod to the initial position and the lowered position, at which time the lifting machine pipe seat 300 is sealed by its original structure; the dynamic duct lifting mechanism 400 can drive the pull rod to further descend to the maintenance position, at which time the sealing device 100 realizes the sealing of the lifting machine pipe seat 300.

[0034] In some embodiments, the rod connector 12 is threadedly connected to the rod 500. In some embodiments, the end of the rod 500 is formed with threads; the rod connector 12 forms a connecting groove 121, and the inner wall of the connecting groove 121 is formed with threads, and the threads of the inner wall of the connecting groove 121 cooperate with the threads of the rod 500 to make the rod connector 12 threadedly connected to the rod 500.

[0035] In some embodiments, the driving connector 13 is threadedly connected to the movable conduit lifting mechanism 400. In some embodiments, the movable conduit lifting mechanism 400 includes a housing 410 and a rack 420 disposed in the housing 410, and the rack 420 is threadedly connected to the driving connector 13.

[0036] When the dynamic conduit lifting mechanism 400 drives the rod 11 to descend, the sealing assembly 20 can descend along with the rod 11 to seal between the lifting machine pipe seat 300 and the rod 11 .

[0037] See also Figure 4 In some embodiments, the sealing assembly 20 may include a first sealing member 21 and a second sealing member 22 that are sealed together. The first sealing member 21 is used to be sealed together with the rod 11, and the second sealing member 22 is used to form a seal with the lifter pipe seat 300 when the movable duct lifting mechanism 400 drives the rod 11 to descend to the maintenance position. In such an embodiment, when the movable duct lifting mechanism 400 drives the rod 11 to descend to the maintenance position, the lifter pipe seat 300 and the rod 11 can be sealed by the first sealing member 21 and the second sealing member 22; at the same time, by setting the first sealing member 21 to be sealed together with the rod 11 and the second sealing member 22, the leakage of radioactive gas entering the sealing assembly 20 can be prevented, which is conducive to ensuring the sealing inside the stack container.

[0038] In some embodiments, the first sealing member 21 is welded to the rod 11. In some embodiments, the first sealing member 21 and the second sealing member 22 can be lowered together with the rod 11.

[0039] See also Figure 4In some embodiments, the second seal 22 may include an elastic seal 221 and a seal holder 222. The elastic seal 221 is used to abut against the lifter pipe seat 300 to form a seal when the movable guide tube lifting mechanism 400 drives the rod 11 to descend to the maintenance position; the seal holder 222 is used to hold the elastic seal 221, and the seal holder 222 is sealed and connected to the first seal 21. In such an embodiment, by abutting the elastic seal 221 against the lifter pipe seat 300 to form a seal, no gap is generated, the radioactive gas inside the stack container is prevented from leaking from the gap, and the sealing effect is ensured; at the same time, the seal holder 222 is set to be sealed and connected to the first seal 21, which can prevent the radioactive gas inside the stack container from leaking from the connection between the first seal 21 and the seal holder 222.

[0040] In some embodiments, the elastic sealing member 221 may be a sealing ring. In some embodiments, the elastic sealing member 221 may be made of fluoroplastics, which have the advantages of corrosion resistance and long service life.

[0041] In some embodiments, the elastic seal 221 and the seal holder 222 can be raised and lowered together with the rod 11. In some embodiments, after the maintenance of the dynamic duct lifting mechanism 400 is completed, the dynamic duct lifting mechanism 400 drives the rod 11 to rise, so that the elastic seal 221 and the lifting machine pipe seat 300 are no longer in contact to release the seal.

[0042] In some embodiments, when the elastic seal 221 abuts against the lifter pipe seat 300 to form a seal, the dynamic duct lifting mechanism 400 will still drive the rod 11 to descend a certain distance so that the elastic seal 221 abuts against the lifter pipe seat 300, which is beneficial to improve the sealing effect. In some embodiments, after the maintenance of the dynamic duct lifting mechanism 400 is completed, the dynamic duct lifting mechanism 400 will first drive the rod 11 to rise a certain distance so that the elastic seal 221 and the lifter pipe seat 300 are no longer abutted, and then the dynamic duct lifting mechanism 400 will drive the rod 11 to continue to rise so that the elastic seal 221 and the lifter pipe seat 300 are no longer abutted to release the seal.

[0043] See also Figure 4 In some embodiments, the first sealing member 21 may be an expansion joint. In such an embodiment, when the elastic sealing member 221 contacts the lifting machine pipe seat 300, the elastic sealing member 221 stops descending and remains stationary, thereby causing the sealing member retaining member 222 to stop descending and remain stationary. Since the expansion joint is flexible, the rod 11 can continue to descend, so that the elastic sealing member 221 and the lifting machine pipe seat 300 can be tightly contacted.

[0044] See also Figure 2 and Figure 4In some embodiments, the pipe seat 300 of the hoist can be formed with a pipe seat passage 310 for the pull rod 500 to pass through and a pipe seat installation groove 320 for installing the sealing assembly 20. The bottom wall of the pipe seat installation groove 320 forms a pipe seat through hole 330 connected to the pipe seat passage 310. The bottom wall of the pipe seat installation groove 320 located at the periphery of the pipe seat through hole 330 forms a conical surface 350. The elastic seal 221 forms an arc surface 2210 that matches the bottom wall of the pipe seat installation groove 320. In such an embodiment, the arc surface 2210 and the conical surface 350 are conducive to forming a seal between the elastic seal 221 and the pipe seat through hole 330 when the elastic seal 221 and the pipe seat through hole 330 are not centered or when the elastic seal 221 is tilted.

[0045] In some embodiments, the inclined surface of the conical surface 350 formed on the bottom wall of the tube seat mounting groove 320 located at the periphery of the tube seat through hole 330 extends downward from the radial outer side toward the radial inner side, and accordingly, the inclined surface of the arc surface 2210 formed by the elastic sealing member 221 also extends downward from the radial outer side toward the radial inner side.

[0046] See also Figure 4 In some embodiments, the seal holder 222 is formed with a retaining installation groove 2220 on one side facing the bottom wall of the pipe seat installation groove 320, and the elastic seal 221 can be arranged in the retaining installation groove 2220. In some embodiments, the second seal 22 may further include a retaining fitting 223 connected to the seal holder 222 to prevent the elastic seal 221 from being separated from the retaining installation groove 2220. In such an embodiment, the elastic seal 221 is arranged in the retaining installation groove 2220 by the retaining fitting 223 so as not to be separated, so that the elastic seal 221 abuts against the lift pipe seat 300.

[0047] In some embodiments, the retaining fitting 223 may be a square nut, which is more suitable for the installation and fastening of the second sealing member 22 and is more securely fixed.

[0048] In some embodiments, see Figure 4 The sealing assembly 20 may further include an anti-loosening member 25, which is disposed between the retaining fitting 223 and the seal retaining member 222 to prevent the retaining fitting 223 and the seal retaining member 222 from loosening. In some embodiments, the anti-loosening member 25 may be a gasket.

[0049] See also Figure 4In some embodiments, the elastic seal 221 is clearance-matched with the retaining installation groove 2220. In such an embodiment, the elastic seal 221 can be provided with axial and radial movement, so that when the elastic seal 221 is not centered with the pipe seat through hole 330, a seal can still be formed between the elastic seal 221 and the pipe seat through hole 330, and between the elastic seal 221 and the seal holder 222. The axial and radial movement is related to the degree of misalignment between the tie rod 500 and the hoist pipe seat 300.

[0050] See also Figure 4 and Figure 5 In some embodiments, the elastic seal 221 may include a first portion 2211 and a second portion 2212 connected to the first portion 2211, wherein the first portion 2211 is located in the retaining installation groove 2220 and is stopped by the retaining fitting 223, and the second portion 2212 extends from the first portion 2211 toward the bottom wall of the tube seat installation groove 320; wherein a V-shaped groove 22110 is formed on the end surface of the first portion 2211 away from the second portion 2212. In such an embodiment, by providing the V-shaped groove 22110, the first portion 2211 is easily deformed, and the sealing effect between the elastic seal 221 and the seal holder 222 can be further improved when the elastic seal 221 and the tube seat through hole 330 are not centered or when the elastic seal 221 is tilted.

[0051] See also Figure 1 and Figure 4 In some embodiments, the sealing assembly 20 may further include an end fixing member 23 and an elastic member 24. The end fixing member 23 is disposed on the rod 11; the elastic member 24 is disposed between the end fixing member 23 and the second sealing member 22, and is used to provide a force for the second sealing member 22 to be pressed against the lifter pipe seat 300. In such an embodiment, by arranging the elastic member 24 between the end fixing member 23 and the second sealing member 22, the elastic member 24 can provide a force to the second sealing member 22 to press the second sealing member 22 against the lifter pipe seat 300, thereby ensuring a sealing effect.

[0052] In some embodiments, the elastic member 24 may be a square spring, which is more suitable for the sealing structure and has better elasticity and anti-fatigue effect. Compared with a round spring, a square spring is smaller in size and easier to install.

[0053] The elastic member 24 may be disposed between the end fixing member 23 and the seal holder 222 , and the elastic member 24 may be used to provide a force for the elastic seal 221 to be pressed against the lifter pipe seat 300 .

[0054] In some embodiments, the end fixing member 23 may include a flange 231 and an end fixing nut 232, and the elastic member 24 may be arranged between the flange 231 and the sealing member retaining member 222; the flange 231 is sleeved on the rod 11, and the flange 231 can compress the square spring so that the spring can provide a force to the elastic seal 221; the end fixing nut 232 is threadedly connected to the rod 11 at the upper end of the flange 231, and is used to position the sealing assembly 20 on the rod 11.

[0055] Specifically, when the elastic seal 221 abuts against the hoist pipe seat 300, the elastic seal 221 stops descending and remains stationary, thereby causing the seal retainer 222 to stop descending and remain stationary; since the expansion joint is flexible, the rod 11 can continue to descend; the continued descent of the rod 11 will drive the end fixing nut 232 to descend, thereby causing the flange 231 to compress the spring, so that the spring provides a force to the elastic seal 221, thereby pressing the elastic seal 221 and the hoist pipe seat 300 tightly.

[0056] See also Figure 4 In some embodiments, the sealing assembly 20 may further include an adjusting member 26, which is disposed between the flange 231 and the elastic member 24, and between the elastic member 24 and the sealing member retaining member 222, and is used to adjust the gap between the flange 231 and the elastic member 24, and the gap between the elastic member 24 and the sealing member retaining member 222. The adjusting member 26 is, for example, an adjusting pad. By setting the thickness of the adjusting member 26, the spring compression amount and the pressing force of the elastic member 24 can be adjusted to ensure that the pressing force of the elastic member 24 after installation meets the use requirements.

[0057] See also Figure 1 , Figure 6 and Figure 7 In some embodiments, the rod 11 may include a first rod 111, a second rod 112, and a threaded connector 113. The first rod 111 and the pull rod connector 12 are an integrally formed part, and the second rod 112 and the drive connector 13 are an integrally formed part. For ease of description, the integrally formed part consisting of the first rod 111 and the pull rod connector 12 may be referred to as a first rod connector, and the integrally formed part consisting of the second rod 112 and the drive connector 13 may be referred to as a second rod connector.

[0058] The threaded connector 113 is threadedly connected to the first rod 111 and the second rod 112 respectively; wherein the sealing assembly 20 is disposed on the first rod 111. Since the dynamic conduit lifting mechanism 400 can only be lifted upward to a relatively small height, such a structure facilitates the installation of the sealing device 100 in the pipe seat installation groove 320 of the lifting machine pipe seat 300.

[0059] In some embodiments, the threaded connector 113 may be a long nut. In some embodiments, the flange 231 is sleeved on the first rod 111 , and the end fixing nut 232 is screwedly connected to the first rod 111 .

[0060] See also Figure 4 and Figure 6 In some embodiments, the first rod 111 includes a limiting portion 1111, which is formed above the tie rod connector 12 and is used to limit the bottom end of the second sealing member 22. In such an embodiment, the bottom end of the second sealing member 22 can be limited by the limiting portion 1111 to achieve axial limiting of the sealing assembly 20.

[0061] See also Figure 2 and Figure 3 In some embodiments, the lifting machine pipe seat 300 also forms an intermediate channel 340 connecting the pipe seat channel 310 and the pipe seat mounting groove 320. When the dynamic pipe lifting mechanism 400 drives the rod 11 to descend to the maintenance position, the limiting portion 1111 enters the intermediate channel 340 and abuts against the bottom wall of the intermediate channel 340.

[0062] In some embodiments, the end surface of the seal holder 222 facing the first rod 111 is formed with a groove 2221 extending in the axial direction. Figure 4 In some embodiments, the sealing device 100 may further include a circumferential limiting portion 1112 for limiting the circumference of the seal holder 222. The circumferential limiting portion 1112 is disposed above the limiting portion 1111, and the circumferential limiting portion 1112 can enter the groove 2221 of the seal holder 222; in the process of the movable duct lifting mechanism 400 driving the rod 11 to descend to the maintenance position, the circumferential limiting portion 1112 can move axially in the groove 2221 of the seal holder 222, but cannot move in the circumferential direction. In such an embodiment, the seal holder 222 can be limited by the movement of the circumferential limiting portion 1112 in the groove 2221 of the seal holder 222, thereby preventing the seal holder 222 from rotating circumferentially, which is beneficial to ensure the sealing effect of the sealing assembly 20.

[0063] In some embodiments, the first rod 111 is provided with a mounting groove 1113, and the circumferential limiting portion 1112 is disposed on the first rod 111 through the mounting groove 1113. In some embodiments, the circumferential limiting portion 1112 is a screw.

[0064] In some embodiments, the lower part of the tie rod connector 12 may also be provided with a plurality of matching holes 122 along the circumferential direction. When the tie rod 500 is threadedly connected to the tie rod connector 12, the circumferential anti-rotation hole of the tie rod 500 faces the two oppositely arranged matching holes 122. The tie rod 500 and the tie rod connector 12 are prevented from rotating relative to each other by the positioning pin 123 passing through the matching hole 122 and the circumferential anti-rotation hole. The positioning pin 123 may be, for example, a cotter pin. The vertical length of the matching hole 122 may be greater than 5 cm, so as to adjust the vertical height of the tie rod 500 when the tie rod 500 is threadedly connected to the tie rod connector 12.

[0065] In some embodiments, the sealing device 100 may further include a locking nut 101 and a locking fitting 102, which are disposed on the second rod connector and are used to lock the second rod connector and the rack 420 to prevent the connection from loosening. The locking fitting 102 is, for example, a stop washer.

[0066] In some embodiments, during the installation of the sealing device 100, the first rod connector can be threadedly connected to the pull rod 500 first, and then the sealing assembly 20 can be positioned by the end fixing nut 232, and the sealing assembly 20 can be assembled with the first rod connector; then the second rod connector can be threadedly connected to the rack 420 of the dynamic guide tube lifting mechanism 400, and the second rod connector and the rack 420 can be locked using the locking nut 101 and the locking fitting 102; finally, the first rod connector and the second rod connector can be connected using the threaded connector 113 to complete the installation.

[0067] An embodiment of the present application also provides a reactor, comprising: a stack container and a valve installed on the stack container; a lifting machine pipe seat 300 installed on the valve; a pull rod and a moving guide tube connected to the pull rod; a moving guide tube lifting mechanism 400 installed on the lifting machine pipe seat 300, the moving guide tube lifting mechanism 400 is used to drive the pull rod to move up and down, thereby driving the moving guide tube to move up and down; the reactor also includes a sealing device 100 of any embodiment of the present application, which is installed on the lifting machine pipe seat 300 and is used to seal the lifting machine pipe seat 300 when the moving guide tube lifting mechanism 400 drives the pull rod to descend to the maintenance position.

[0068] The dynamic duct lifting mechanism 400 can drive the pull rod to be in the initial position and the lowered position, at which time the lifting machine pipe seat 300 and the dynamic duct lifting mechanism 400 form a sealed space; the dynamic duct lifting mechanism 400 can drive the pull rod to further descend from the lowered position to the maintenance position, at which time the sealing device 100 realizes the sealing of the lifting machine pipe seat 300.

[0069] The following describes the process of sealing and releasing the sealing of the lifting machine pipe seat 300 using the sealing device 100 provided in the embodiment of the present application.

[0070] See also Figure 2 and Figure 3 When the dynamic duct lifting mechanism 400 is inspected and repaired, the rack 420 of the dynamic duct lifting mechanism 400 drives the rod 11 to descend, and then drives the entire sealing assembly 20 to descend, and the elastic seal 221 gradually begins to contact with the lifting machine pipe seat 300; when the elastic seal 221 abuts against the lifting machine pipe seat 300, a seal is formed between the lifting machine pipe seat 300 and the elastic seal 221; thereafter, the rack 420 continues to descend, and the limiting portion 1111 enters the middle channel 340 and abuts against the bottom wall of the middle channel 340, and the square spring is compressed, exerting a pressing force on the elastic seal 221, so that the elastic seal 221 abuts against the lifting machine pipe seat 300 to complete the sealing.

[0071] After the inspection of the dynamic duct lifting mechanism 400 is completed, the rack 420 drives the rod 11 to rise, and then drives the entire sealing assembly 20 to rise, the compression of the square spring is released, and the elastic seal 221 and the lifting machine pipe seat 300 are no longer tightly abutted; then, the rack 420 continues to rise, so that the elastic seal 221 and the lifting machine pipe seat 300 are no longer abutted, and the seal is released.

[0072] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0073] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A sealing device for sealing a lifting machine pipe seat on a reactor cock, wherein a moving guide tube lifting mechanism is provided in the lifting machine pipe seat, and the moving guide tube lifting mechanism is used to drive a pull rod connected to the moving guide tube to rise and fall, characterized in that: The sealing device comprises: A connecting assembly, the connecting assembly comprising a rod and a pull rod connecting member and a driving connecting member formed at both ends of the rod, the pull rod connecting member being used to connect with the pull rod, and the driving connecting member being used to connect with the moving guide tube lifting mechanism; A sealing assembly is arranged on the rod and is used to seal between the lifting machine pipe seat and the rod when the movable duct lifting mechanism drives the rod to descend to the maintenance position.

2. The sealing device according to claim 1, characterized in that: The sealing assembly includes a first sealing member and a second sealing member which are sealed and connected to each other. The first sealing member is used for sealingly connecting to the rod member, and the second sealing member is used for forming a seal with the lifting machine pipe seat when the moving guide tube lifting mechanism drives the rod member to descend to the maintenance position.

3. The sealing device according to claim 2, characterized in that: The first sealing member is an expansion joint.

4. The sealing device according to claim 2, characterized in that: The second sealing member comprises: An elastic sealing member, used for abutting against the lifting machine pipe seat to form a seal when the movable pipe lifting mechanism drives the rod member to descend to the maintenance position; A seal holder is used to hold the elastic seal, and the seal holder is sealingly connected to the first seal.

5. The sealing device according to claim 4, characterized in that: The pipe seat of the lifting machine is formed with a pipe seat passage for the pull rod to pass through and a pipe seat installation groove for installing the sealing assembly, the bottom wall of the pipe seat installation groove is formed with a pipe seat through hole communicating with the pipe seat passage, and the bottom wall of the pipe seat installation groove located at the periphery of the pipe seat through hole is formed with a conical surface; The elastic sealing member forms an arc surface matched with the bottom wall of the tube seat installation groove.

6. The sealing device according to claim 5, characterized in that: The sealing member retainer has a side facing the bottom wall of the tube seat mounting groove to form a retaining and mounting groove, and the elastic sealing member is arranged in the retaining and mounting groove; The second sealing member also includes a retaining fitting connected to the sealing member retaining member for preventing the elastic sealing member from being separated from the retaining mounting groove.

7. The sealing device according to claim 6, characterized in that: The elastic sealing member is clearance-matched with the retaining installation groove.

8. The sealing device according to claim 7, characterized in that: The elastic sealing member includes a first portion and a second portion connected to the first portion, the first portion is located in the retaining installation groove and is stopped by the retaining fitting, and the second portion extends from the first portion toward the bottom wall of the tube seat installation groove; Wherein, a V-shaped groove is formed on the end surface of the first part away from the second part.

9. The sealing device according to claim 2, characterized in that: The sealing assembly further comprises: An end fixing member, arranged on the rod member; The elastic member is arranged between the end fixing member and the second sealing member, and is used for providing a force for pressing the second sealing member against the lifting machine pipe seat.

10. A reactor comprising: A stack container and a cock disposed on the stack container; A lifting machine pipe seat, arranged on the cock; A pull rod and a moving guide tube connected to the pull rod; A moving conduit lifting mechanism is arranged on the lifting machine pipe seat, and the moving conduit lifting mechanism is used to drive the pull rod to move up and down, thereby driving the moving conduit to move up and down; It is characterized in that the reactor also includes a sealing device as described in any one of claims 1 to 9, which is arranged on the elevator tube seat and is used to seal the elevator tube seat when the moving guide tube lifting mechanism drives the pull rod to descend to the maintenance position.

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