A reactor leakage monitoring pressurization experiment plugging device

Abstract

The present application belongs to the technical field of nuclear power plant reactor maintenance, and particularly relates to a reactor leakage monitoring pressurization experiment plugging device. The present application comprises an upper pipe orifice sealing adjustment assembly for sealing the leakage monitoring pipe orifice in the radial direction, which is installed on a lower positioning adjustment assembly; the lower positioning adjustment assembly is inserted into the inside of the upper assembly adapter pipe and establishes a sliding contact connection with the inner wall of the upper assembly adapter pipe; an adjustment ring is installed on the upper part of the lower positioning adjustment assembly, which is located on the lower sealing surface and used for adjusting the position of the lower positioning adjustment assembly in the upper assembly adapter pipe. The present application can reduce the burden of workers, improve the sealing efficiency and effect of the leakage monitoring pipe orifice in the upper assembly adapter pipe, ensure the smooth implementation of the leakage monitoring pressurization experiment, reduce the occurrence of sealing abnormalities, and reduce the total collective dose value of the reactor leakage monitoring pressurization experiment work.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power plant reactor maintenance technology, specifically relating to a reactor leakage monitoring and pressure testing sealing device. Background Technology

[0002] A nuclear power plant reactor superstructure has 139 top cover nozzles, including 121 for the control rod drive mechanism and 18 for the neutron temperature measurement channel. The pulse tube for the superstructure flange leakage signal system is installed in a sealed chamber formed by the top cover nozzles, flanges, and gaskets. The pulse tube has a diameter of Φ6mm and is made of nuclear safety level II seamless stainless steel. The inlet flange of the pulse tube is sealed by the preload provided by the bolts and nuts of the control rod drive mechanism pressure vessel or the neutron temperature measurement channel flange, which is mechanically transmitted to the Φ116×Φ107×6.5 and Φ107×Φ101×5 graphite sealing rings. The outlet side of the pulse tube is connected to the instrumentation and control leakage signal device. The function of the pulse tube is to provide a channel between the superstructure nozzles and the instrumentation and control leakage detection signal device. In the event of a seal failure at the superstructure nozzle sealing boundary, the pressure fluctuation in the primary loop will be transmitted through the pulse tube to the instrumentation and control pressure switch, which will then feed back to the main control room operating system to display a fault alarm.

[0003] During the unit overhaul, the upper component leakage monitoring pressure test requires 6 sets of tests on the upper component, and each set of tests requires sealing 3 pipe connection areas. There are two methods for the upper component leakage monitoring pressure test: one is to use the neutron temperature measurement channel flange to seal the pipe connection area for the upper component leakage monitoring pressure test, and the other method is to use Russian-supplied sector components for the upper component leakage monitoring pressure test.

[0004] The first method involves installing neutron temperature measurement channel flanges onto three connecting flanges, requiring a total of 18 neutron temperature measurement channel flanges. During the pressure test for leak monitoring of the upper component using measurement channel flange seals in the upper component inspection well, the neutron measurement channel connecting flanges and their sealing surfaces are first cleaned with alcohol. A layer of molybdenum disulfide is applied to the threads of six M27 stud bolts, which are then installed onto the measurement channel connecting flanges. Next, Φ107×Φ101×5 and Φ116×Φ107×6.5 graphite gaskets are installed on the neutron temperature measurement channel flanges, with an M12 threaded hole in the center of the flange. Screw in the tie rod and install the flange onto the corresponding neutron temperature measurement channel connector. Unscrew the tie rod from the flange, then install the sleeves and nuts on the six double-ended bolts. Tighten the nuts sequentially using torques of 50 NM, 100 NM, 150 NM, and 200 NM using a cross-tight method to complete the installation of the three neutron temperature measurement channel connector flanges corresponding to this group of leak monitoring flanges. Then connect the pressure testing line to the pressure test plug through a quick connector and pressurize by opening the nitrogen cylinder pressure reducing valve. After pressurization, remove the neutron temperature measurement channel flanges and fasteners from the connectors one by one and clean the flange sealing surfaces with alcohol.

[0005] The second method involves installing a rubber gasket on the leakage monitoring hole on the side of one of the neutron temperature measurement channel connecting flanges in any group of neutron temperature measurement channels. Then, using a Russian-supplied sector-shaped component, one side of the sector-shaped component is attached to the connecting flange. The locking nut in the middle of the sector-shaped component is tightened with a wrench to seal the leakage monitoring hole on the connecting flange. This process is repeated for the remaining two neutron temperature measurement channel connecting flanges in the same group. The pressure testing line is then connected to the pressure test plug via a quick-connect coupling. Pressure is applied by opening the nitrogen cylinder pressure reducing valve. After pressure testing, the sector-shaped components need to be removed one by one.

[0006] The above-described methods for pressure testing the upper component leakage monitoring system represent two methods currently used in overhauls. Based on feedback from post-overhaul experiences, when using the neutron temperature measurement channel flange sealing pipe area for upper component leakage monitoring pressure testing, the team faces several challenges. Firstly, the installation process is complex, involving numerous components and limited operating space. If the graphite gasket is not properly installed, many sealing components must be removed and reinstalled, extending the work time. Secondly, the high temperature environment leads to further fatigue among workers, and the high radiation dose rate increases the collective absorbed dose for workers. Using the second method, the sector-shaped component sealing pressure test, presents a problem where the rubber seal can easily detach during the sealing process. Figure 1As shown, the flange opening has a 1°30″ slope. When tightening the nut of the sector component, this slope can easily squeeze out the rubber, failing to achieve a seal. Therefore, the rubber gasket must be positioned with high precision and not be misaligned. Otherwise, the rubber needs to be reinstalled to achieve a seal, extending the operator's working time and increasing the radiation dose. Thus, in adverse working environments with high temperature and high radiation dose rates, workers are limited by poor working positions, physical strength and energy, and inherent human inertia. They may be unfamiliar with the leak monitoring pressure test method or fail to seal properly during the test, leading to the failure to successfully complete the leak monitoring pressure test.

[0007] In order to reduce the burden on staff, improve the sealing efficiency and effect of the leak monitoring pipe in the upper component connection, ensure the smooth implementation of the leak monitoring pressure test, reduce the occurrence of sealing abnormalities, and reduce the total collective dose value of this work, it is urgent to provide a reactor leak detection pressure test sealing device. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a reactor leakage monitoring pressure test sealing device, which can reduce the burden on the staff, improve the sealing efficiency and effect of the leakage monitoring pipe in the upper component pipe, enable the smooth implementation of the leakage monitoring pressure test, reduce the occurrence of sealing abnormalities, and at the same time reduce the total collective dose value of the reactor leakage monitoring pressure test.

[0009] The technical solution adopted in this invention is as follows:

[0010] A reactor leak monitoring pressure test plugging device includes a leak monitoring port on the upper part of the upper component connector to be monitored. The internal structure includes an upper sealing surface and a lower sealing surface from top to bottom. The plugging device includes an upper port sealing adjustment assembly for radially sealing the leak monitoring port. The upper port sealing adjustment assembly is mounted on a lower positioning adjustment assembly. The lower positioning adjustment assembly is inserted into the upper component connector and establishes a sliding contact connection with the inner wall of the upper component connector. An adjustment ring is installed on the upper part of the lower positioning adjustment assembly, located on the lower sealing surface, for adjusting the position of the lower positioning adjustment assembly within the upper component connector.

[0011] The upper pipe sealing adjustment assembly includes a steel ring, an adjusting block, a slide rail, a slide rod, a sealing rubber, a sealing rubber positioning tube, a packing hole, and a top screw. The steel ring is fixedly installed at the center of the top of the adjusting block. The adjusting block has a cuboid upper part and a cylinder lower part. The upper cuboid has a transverse slide rail. The slide rail has a threaded hole on the left side and a smooth hole on the right side. The slide rod is installed in the smooth hole of the slide rail, and the top screw mates with the threaded hole on the left side of the slide rail. The right head of the top screw contacts the slide rod, and a cylindrical packing hole is opened on the right side of the slide rod. The sealing rubber is installed in the cylindrical packing hole, and a sealing rubber positioning tube is installed at the center of the sealing rubber. The sealing rubber positioning tube is connected to the leakage monitoring pipe. The lower cylinder has threads on its outer wall.

[0012] The lower positioning and adjustment assembly includes a positioning cylinder. The main body of the positioning cylinder is cylindrical. The upper inner wall of the positioning cylinder is threaded, which is engaged with the threaded outer wall of the lower cylinder of the adjustment block. The lower part of the positioning cylinder has a cavity.

[0013] The upper part of the positioning cylinder has a circular relief groove below the thread, and an exhaust hole is machined at the right side of the center of the plane below the relief groove.

[0014] The width of the relief groove is 1.5 times the thread pitch.

[0015] The bottom outer wall of the positioning cylinder is an inverted conical surface.

[0016] The upper outer wall of the positioning cylinder (13) is threaded, and the adjusting ring is sleeved on the upper part of the positioning cylinder through a threaded connection; the adjusting ring is installed on the lower sealing surface, the outer surface of the adjusting ring is smooth, the inner surface is threaded, and it cooperates with the positioning cylinder. The material is nylon.

[0017] The adjusting ring structure is a circular ring with a diameter 0.2 mm smaller than the diameter of the lower sealing surface step and a thickness 3 mm smaller than the thickness of the lower sealing surface step.

[0018] The sealing rubber undergoes radial displacement within the component, exerting force around the leak monitoring port. Due to the reaction force, the sealing rubber deforms and seals the leak monitoring port area.

[0019] The lower positioning adjustment component is inserted from the upper part of the upper component pipe. It is observed through the upper sealing surface to avoid collision between the positioning cylinder and the upper sealing surface. When the bottom of the adjustment ring on the positioning cylinder falls onto the step where the lower sealing surface is located, the initial installation position is in place.

[0020] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0021] (1) The reactor leakage monitoring pressure test sealing device provided by the present invention can reduce the burden on the staff, improve the efficiency of leakage monitoring pressure test, avoid the occurrence of abnormal events where the leakage monitoring pipe is difficult to seal, and at the same time reduce the total collective dose value of the reactor leakage monitoring pressure test.

[0022] (2) The reactor leakage monitoring pressure test sealing device provided by the present invention is lightweight and flexible. The main structure is a hollow cylindrical structure. While meeting the overall structural strength, the weight of the whole device is reduced to the maximum extent. At the same time, it is convenient for operators to observe, rotate and adjust the sealing direction and install.

[0023] (3) The reactor leakage monitoring pressure test sealing device provided by the present invention adopts a threaded connection to provide a reliable connection between the upper and lower components, and can conveniently and flexibly adjust the circumferential direction of the leak monitoring tube opening sealing according to the on-site requirements.

[0024] (4) The reactor leakage monitoring pressure test sealing device provided by the present invention achieves fine adjustment and axial height adjustment of the center position of the leakage monitoring pipe opening by moving the nylon adjustment ring of the device body up and down.

[0025] (5) The reactor leakage monitoring pressure test sealing device provided by the present invention has a screw rod, a cylindrical slide rod and sealing rubber moving in the slide. On the one hand, the circular motion can quickly form a linear motion channel, making the sealing position observation convenient and faster; on the other hand, the positioning tube in the center of the rubber block is positioned exactly in the center of the leakage monitoring tube, ensuring the accurate positioning of the seal.

[0026] (6) The present invention provides a reactor leakage monitoring pressure test sealing device. The rubber pressure block and nylon adjustment ring on the sealing device are relatively softer than metal materials, which can protect the sealing surface of the upper component pipe and the base material of the leakage monitoring pipe.

[0027] (7) The reactor leakage monitoring pressure test sealing device provided by the present invention has detachable and easily scattered components that strictly comply with the relevant requirements for foreign object prevention in power plants in terms of structural design, making it convenient to take foreign object prevention measures. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1This is a schematic diagram of the reactor leakage monitoring and pressure testing sealing device provided by the present invention;

[0030] Figure 2 A schematic diagram of the sealing device installation;

[0031] In the diagram: 1-Steel ring, 2-Adjusting block, 3-Slide rail, 4-Slide rod, 5-Sealing rubber, 6-Sealing rubber positioning tube, 7-Filling hole, 8-Relief groove, 9-Exhaust hole, 10-Inverted conical surface, 11-Top screw, 12-Adjusting ring, 13-Positioning cylinder, 14-Cavity, 15-Upper component connector, 16-Upper sealing surface, 17-Lower sealing surface, 18-Leakage monitoring port. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] like Figure 1 As shown, the reactor leak monitoring pressure test sealing device provided by the present invention includes an upper pipe port sealing adjustment assembly, which is used to generate radial displacement of the sealing rubber 5 within the assembly. The force is applied around the leak monitoring pipe 18 port, and due to the reaction force, the sealing rubber 5 deforms and seals the leak monitoring pipe 18 port area.

[0036] The upper pipe opening sealing adjustment assembly includes a steel ring 1, an adjusting block 2, a slide rail 3, a slide rod 4, a sealing rubber 5, a sealing rubber positioning tube 6, a packing hole 7, and a top screw 11.

[0037] The upper part of the adjusting block 2 is a cuboid and the lower part is a cylinder. The upper cuboid provides more space and facilitates operation when installing and disassembling the sealing device. The lower cylinder has threads on its outer wall. The top is a circular steel ring 1 with an outer diameter of Φ52mm and an inner diameter of Φ38mm. The steel ring 1 is welded to the center of the top of the adjusting block 2 by argon arc welding. Its function is twofold: firstly, it serves as a safety rope for the sealing device during installation (according to the classification of foreign object prevention for power station equipment, the upper component inspection well belongs to the first-level foreign object prevention area). According to the relevant requirements for foreign object prevention of the power station, it prevents the sealing device from falling into the top cover of the upper component and forming foreign objects. This complies with the power station's foreign object prevention management regulations and implements the power station's foreign object prevention measures. Secondly, it also serves as a handle for operators to install and operate the adjusting device.

[0038] The upper cuboid has a transverse slide rail 3. The slide rail 3 has a threaded hole on the left side and a smooth hole on the right side. The slide rod 4 is installed in the smooth hole of the slide rail 3. The top screw 11 is engaged with the threaded hole on the left side of the slide rail 3. The right head of the top screw 11 contacts the slide rod 4. The right side of the slide rod 4 has a cylindrical packing hole 7. The cylindrical packing hole 7 is filled with sealing rubber 5. The main structure of the sealing rubber 5 is a cylindrical rubber with a stainless steel sealing rubber positioning tube 6 with a diameter of Φ2mm at the center. Through the cooperation of the top screw 11, slide rod 4, slide rail 3 and sealing rubber 5 in the slide rail 3, the circular motion is cleverly converted into radial linear motion. This makes it easy for the operator to observe and rotate the top screw 11, ensuring that there are no gaps between the sealing rubber 5 and the leak detection pipe opening, and reliably adjusting the tightness of the leak detection pipe opening.

[0039] The upper pipe sealing adjustment assembly is installed on the lower positioning adjustment assembly. The lower positioning adjustment assembly includes a positioning cylinder 13. The main structure of the positioning cylinder 13 is cylindrical and made of stainless steel. The positioning cylinder 13 is located inside the upper assembly pipe 15 and establishes a sliding contact connection with the inner wall of the upper assembly pipe 15 to increase the rigidity and stability of the entire sealing device.

[0040] The upper inner wall of the positioning cylinder 13 is threaded, which is engaged with the thread on the lower cylindrical outer wall of the adjusting block 2. This connects the upper and lower components of the sealing device into a whole. A circular relief groove 8 is provided below the upper thread of the positioning cylinder 13. The width of the relief groove 8 is 1.5 times the thread pitch as required by the "Machining Process Handbook". This ensures that the threads do not "seize" when the internal and external threads are rotated. A vent hole 9 with a diameter of Φ3mm is machined at the center of the plane below the relief groove 8 on the right side. The function of the vent hole 9 is to remove residual air when the adjusting block 2 and the positioning cylinder 13 are engaged, so that there is no pressure from the reverse force on the mating parts, making the installation easy and smooth.

[0041] The lower part of the positioning cylinder 13 has a cavity 14. The cavity 14 is cylindrical in shape. The cavity 14 is designed to reduce weight and facilitate easy installation and disassembly by personnel. It is also the part where the weight of this sealing device is reduced the most, but it also ensures the overall rigidity of the device inside the upper component pipe 15.

[0042] The bottom outer wall of the positioning cylinder 13 is an inverted conical surface 10, which is cone-shaped. This part serves two purposes: firstly, when the upper component leakage monitoring and sealing device is about to be installed in the upper component side pipe area, the conical surface can act as a smooth transition, protecting the sealing surface step from being squeezed and thus preventing deformation at the edge of the sealing surface step; secondly, it can play a good guiding role when the upper component leakage sealing device is installed in the upper component side pipe area, facilitating the operator's real-time and accurate operation on site.

[0043] The upper outer wall of the positioning cylinder 13 is threaded, and the adjusting ring 12 is sleeved on the upper part of the positioning cylinder 13 through a threaded connection, fixing the cylinder body at the installation position of the upper component pipe 15 (below the lower sealing surface 17).

[0044] The adjusting ring 12 is installed on the lower sealing surface 17. The adjusting ring 12 is a circular ring with a diameter slightly smaller than the diameter Φ107×Φ101 sealing step by 0.2mm. The outer surface of the adjusting ring 12 is smooth, and the inner surface is threaded. It mates with the positioning cylinder 13 and is made of nylon. The main body of the lower sealing surface 17 is made of stainless steel. This fit can effectively protect the sealing surface of the pipe connection area from damage. The thickness of the adjusting ring 12 is 3mm less than the thickness of the upper step of the lower sealing surface 17. This allows for precise axial fine-tuning of the adjusting block 2 and the center of the leakage monitoring pipe 18 inside the pipe connection area on the upper component side. The function of the adjusting ring 12 is to support the weight of the entire sealing device inside the pipe connection of the upper component, ensure a stable and reliable connection, and fine-tune the alignment of the sealing device with the center of the leakage monitoring pipe 18.

[0045] like Figure 2The diagram shows the installation schematic of the reactor leak monitoring and pressure test sealing device provided by this invention.

[0046] On the positioning cylinder 13, rotate the adjusting ring 12 clockwise and counterclockwise to check that the adjusting ring 12 moves normally. Rotate the adjusting ring 12 clockwise until its upper end face is flush with the upper end face of the positioning cylinder 13;

[0047] Apply molybdenum disulfide 232 evenly to the threaded surfaces of the positioning cylinder 13 and the adjusting block 2. Rotate the steel ring 1 clockwise or counterclockwise to screw the adjusting block 2 into the positioning cylinder 13, and check that the adjustment block 2 moves normally. Tighten the adjusting block 2 clockwise through the steel ring 1 to the bottom of the threaded hole of the positioning cylinder 13 and back out one turn. Tighten the top screw 11 clockwise into the threaded hole of the adjusting block 2, controlling the depth to half the distance of the screw thread. Insert the sealing rubber 5 into the slide rod 4 to the bottom, ensuring that the installation direction of the positioning tube 6 with the sealing rubber is on the outside of the slide rod 4. Insert the slide rod 4 with the installed sealing rubber positioning tube 6 into the smooth hole inside the adjusting block 2, with the bottom close to the threaded hole. At this point, the reactor leakage monitoring pressure test sealing device is in the assembled state.

[0048] After securing the safety rope at steel ring 1, gently lift the assembled reactor leak monitoring pressure test plugging device and place it into the upper component connector 15 to be installed, passing through the inverted conical surface 10. Observe carefully during the process of passing through the upper sealing surface 16 step to avoid collision between the positioning cylinder 13 and the upper sealing surface 16. When the bottom of the adjusting ring 12 on the positioning cylinder 13 falls onto the step of the lower sealing surface 17, it indicates that the initial installation position of the plugging device has been achieved.

[0049] Based on the location of the leak monitoring tube 18 in the upper reactor assembly, precisely adjust the working position of the sealing device. During the on-site leak monitoring pressure test, the length of the top screw 11 is adjusted to push the slide rod 4, causing the slide rod 4 to move the sealing rubber 5 to seal the leak detection tube inlet on the upper assembly side. Workers can also use an open-end wrench to adjust the deformation of the sealing rubber 5 to ensure there are no gaps around the leak detection tube inlet, achieving a good sealing effect. For fine-tuning the center position of the upper assembly leak monitoring tube 18, one method is to adjust the height by rotating the thread of the adjusting ring 12 on the sealing device clockwise or counterclockwise to determine the precise radial positioning of the leak detection tube 18. Alternatively, the axial positioning of the leak detection tube 18 can be precisely adjusted by rotating the steel ring 1 on the sealing device. For leak monitoring pressure tests of other groups in the upper reactor assembly, repeat the above steps using the leak monitoring pressure test sealing device.

[0050] The reactor leak monitoring pressure test plugging device solves the problems existing in the previous reactor leak monitoring pressure test process. It simplifies the plugging method of leak detection pipes, improves the observation capabilities of operators during installation and disassembly, enhances the efficiency of plugging leak monitoring pipes in the connection area, reduces the plugging time of reactor leak monitoring pressure tests during unit overhaul by two-thirds, saves operator physical labor, and reduces the total collective dose value of reactor leak monitoring pressure tests. This project can be promoted and applied in related work of similar units.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reactor leakage monitoring and pressure testing sealing device, wherein the upper component connector (15) to be monitored is provided with a leakage monitoring port (18) at its upper part, and the interior includes an upper sealing surface (16) and a lower sealing surface (17) from top to bottom, characterized in that: The sealing device includes an upper port sealing adjustment assembly for sealing the leak monitoring port (18) radially. The upper port sealing adjustment assembly is mounted on a lower positioning adjustment assembly. The lower positioning adjustment assembly is inserted into the upper assembly connector (15) and establishes a sliding contact connection with the inner wall of the upper assembly connector (15). An adjustment ring (12) is installed on the upper part of the lower positioning adjustment assembly. The adjustment ring (12) is located on the lower sealing surface (17) and is used to adjust the position of the lower positioning adjustment assembly within the upper assembly connector (15). The upper pipe sealing adjustment assembly includes a steel ring (1), an adjustment block (2), a slide rail (3), a slide rod (4), a sealing rubber (5), a sealing rubber positioning tube (6), a packing hole (7), and a top screw rod (11). The steel ring (1) is fixedly installed at the top center of the adjustment block (2). The upper part of the adjustment block (2) is a cuboid and the lower part is a cylinder. The upper cuboid has a transverse slide rail (3). The slide rail (3) has a threaded hole near the left side and a smooth hole on the right side. The slide rod (4) is installed in the smooth hole of the slide rail (3), and the top screw (11) is engaged with the threaded hole on the left side of the slide rail (3); the right head of the top screw (11) contacts the slide rod (4), and a cylindrical packing hole (7) is opened on the right side of the slide rod (4); a sealing rubber (5) is installed in the cylindrical packing hole (7), and a sealing rubber positioning tube (6) is installed at the center of the sealing rubber (5); it is connected to the leakage monitoring pipe port (18) through the sealing rubber positioning tube (6); the lower cylindrical body is threaded.

2. The sealing device according to claim 1, characterized in that: The lower positioning adjustment component includes a positioning cylinder (13), the main structure of the positioning cylinder (13) is cylindrical, the upper inner wall of the positioning cylinder (13) is threaded, and it is connected to the lower cylindrical outer wall of the adjustment block (2) by thread; the lower part of the positioning cylinder (13) has a cavity (14).

3. The sealing device according to claim 2, characterized in that: The positioning cylinder (13) has an annular relief groove (8) below the upper thread, and an exhaust hole (9) is machined at the right side of the center of the plane below the relief groove (8).

4. The sealing device according to claim 3, characterized in that: The width of the relief groove (8) is 1.5 times the thread pitch.

5. The sealing device according to claim 2, characterized in that: The bottom outer wall of the positioning cylinder (13) is an inverted conical surface (10).

6. The sealing device according to claim 2, characterized in that: The upper outer wall of the positioning cylinder (13) is threaded, and the adjusting ring (12) is sleeved on the upper part of the positioning cylinder (13) through a threaded connection; the adjusting ring (12) is installed on the lower sealing surface (17). The outer surface of the adjusting ring (12) is smooth, and the inner surface is threaded. It cooperates with the positioning cylinder (13) and is made of nylon material.

7. The sealing device according to claim 6, characterized in that: The adjusting ring (12) is a circular ring with a diameter 0.2 mm smaller than the diameter of the step of the lower sealing surface (17) and a thickness 3 mm smaller than the thickness of the step of the lower sealing surface (17).

8. The sealing device according to claim 1, characterized in that: The sealing rubber (5) generates radial displacement within the component, and the force acts around the leakage monitoring port (18). Due to the reaction force, the sealing rubber (5) deforms and seals the area of ​​the leakage monitoring port (18).

9. The sealing device according to claim 2, characterized in that: The lower positioning adjustment component is inserted from the upper part of the upper component pipe (15). It is observed through the upper sealing surface (16) to avoid the positioning cylinder (13) from colliding with the upper sealing surface (16). When the bottom of the adjustment ring (12) on the positioning cylinder (13) falls onto the step where the lower sealing surface (17) is located, the initial installation position is in place.

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