Emergency treatment device for valve leakage of filler structure of steam system

Abstract

The invention provides a steam system filler structure valve leakage emergency treatment device. The steam system filler structure valve leakage emergency treatment device comprises a sealing cover assembly, a flexible locking assembly and a steam condensation assembly. Flexible locking assemblies are arranged at the two ends of the sealing cover assembly respectively and arranged on a steam pipeline in a sleeving mode so that the sealing cover assembly can wrap a filler structure valve located on the steam pipeline. And the steam condensation assembly is communicated with the sealing cover assembly so as to cool and discharge leaked steam. The sealing cover assembly wraps the outer side of the packing structure valve, the flexible locking assembly which is remotely operated is matched, the sealing cover assembly is pressed at the far end through the flexible locking assembly, the packing structure valve with steam leaking out is wrapped in the sealing cover assembly, shutdown or cutting off of a main steam system is not needed, and the sealing cover assembly is simple in structure and convenient to operate. Production delay and cost loss caused by shut-down and gas shut-down are directly eliminated; and meanwhile, high-temperature scald to personnel and temperature and humidity damage to surrounding equipment and instruments caused by leaked steam can be thoroughly avoided.

Description

Technical Field

[0001] This application belongs to the field of steam system steam leakage treatment technology, specifically relating to an emergency treatment device for external leakage of a steam system packing structure valve. Background Technology

[0002] The reactor steam system contains numerous valves with packing seals, including vent valves, drain valves, blowdown valves, sampling valves, instrument valves, pressure tapping valves, and shut-off valves. Routine inspections by maintenance personnel often fail to effectively identify packing damage, leading to frequent and unexpected steam leaks.

[0003] When a valve on a non-main steam pipeline leaks at its packing, although it does not directly trigger a system shutdown, given the high cost of shutting down the reactor and steam supply, on-site personnel typically opt for emergency temporary measures to maintain operation. However, steam has high temperature and pressure characteristics, and continuous leakage will significantly alter the temperature and humidity of the local environment, threatening not only the stable operation of surrounding equipment and instruments but also directly endangering the safety of on-site personnel.

[0004] Furthermore, according to reactor operating procedures, some leaking valves must remain under positive pressure after reactor shutdown. Under these conditions, opening / closing operations or maintenance work such as packing replacement are prohibited. This means that there is a long window of time between the occurrence of a leak and the system becoming ready for maintenance, during which the leaking steam cannot be effectively contained, causing the problem to persist.

[0005] The core technical challenges we face are: (1) During normal operation of the reactor or during system pressurization, if a sudden steam leak occurs in the valve packing, there is a lack of effective online emergency response measures. Continuous leakage without shutting down the reactor will change the ambient temperature and humidity, causing damage to surrounding operating systems, equipment, instruments, etc., and the high-temperature steam will seriously threaten personnel safety; (2) The amount of external leakage caused by a single steam valve is usually limited, and professional technicians can only repair the valve in the shutdown and cooling state, and the shutdown will delay the production process. Summary of the Invention

[0006] Therefore, the purpose of this application is to provide an emergency treatment device for external leakage of a steam system packing structure valve, which at least solves one of the technical problems mentioned in the background art.

[0007] To address the aforementioned problems, this application provides an emergency treatment device for external leakage of a steam system packing structure valve, comprising a sealing cover assembly, a flexible locking assembly, and a steam condensation assembly; the sealing cover assembly is provided with flexible locking assemblies at both ends, and the flexible locking assemblies are sleeved on the steam pipeline so that the sealing cover assembly encloses the packing structure valve located on the steam pipeline; the steam condensation assembly is connected to the sealing cover assembly to cool and discharge the leaked steam.

[0008] Optionally, the sealing cover assembly includes a sealing cover and a sealing strip. The interior of the sealing cover is hollow to form a packing structure valve mounting cavity. Steam pipe through holes are opened on both ends of the sealing cover. A sealing cover opening is provided on the circumferential sidewall of the sealing cover. The sealing cover opening penetrates the circumferential sidewall along the axial and radial directions of the sealing cover and communicates with the steam pipe through holes. A sealing strip is provided inside the sealing cover opening.

[0009] Optionally, the sealing strip is serrated, and the sealing cover openings are respectively provided with the sealing strips on opposite surfaces, with the teeth of one sealing strip engaging with the grooves of the other sealing strip.

[0010] Optionally, the sealing cover assembly further includes a heat insulation layer, and the sealing cover has an internal interlayer space, with the heat insulation layer disposed within the interlayer space.

[0011] Optionally, the flexible locking assembly includes a locking ring and a remote locking rod. The locking ring is connected to the sealing cover assembly. The locking ring has a locking ring opening. At least two locking rod interfaces are provided on the outer peripheral surface of the locking ring on both sides of the locking ring opening. The remote locking rod is provided in the locking rod interface.

[0012] Optionally, the inner wall of the locking ring is provided with a plurality of curved grooves along the circumferential direction, and a boss is formed between adjacent curved grooves.

[0013] Optionally, the steam condensation assembly includes a steam cooler, a negative pressure generator, a steam overflow pipe section, and a medium outlet pipe section. The inlet of the steam cooler is connected to the sealing cover assembly through the steam overflow pipe section, the outlet of the steam cooler is connected to the inlet of the negative pressure generator through the connecting pipe, and the medium outlet pipe section is connected to the negative pressure generator.

[0014] Optionally, the steam condensation assembly further includes a pressure measuring element, which is disposed on the steam overflow pipe section.

[0015] Optionally, the internal cavity of the steam cooler forms a steam cavity, and the outer surface of the steam cooler is provided with heat dissipation fins, which are protruding structures that do not penetrate the wall thickness of the steam cooler.

[0016] Optionally, the side wall of the steam cooler is provided with a coolant filling cavity, which is filled with coolant.

[0017] By employing the above technical solution, the present invention has at least the following beneficial effects: This application provides an emergency treatment device for external leakage of a steam system packing structure valve. By wrapping a sealing cover assembly around the outside of the packing structure valve and using a remotely operated flexible locking assembly, the sealing cover assembly is pressed tightly at a remote end, enclosing the steam-leaking packing structure valve inside the sealing cover assembly. This eliminates the production delays and cost losses caused by reactor shutdowns and gas outages without the need to stop the machine or cut off the main steam system. At the same time, it can completely avoid high-temperature burns to personnel caused by leaked steam and temperature and humidity damage to surrounding equipment and instruments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an emergency treatment device for external leakage of a steam system packing structure valve, according to an embodiment of this application. Figure 2 This is a cross-sectional view of an emergency treatment device for external leakage of a steam system packing structure valve, according to an embodiment of this application. Figure 3 This is a cross-sectional view of the sealing cover assembly according to an embodiment of this application; Figure 4 This is a schematic diagram of the connection between the packing structure valve and the steam pipeline in an embodiment of this application; Figure 5 This is a schematic diagram of a flexible locking assembly according to an embodiment of this application; Figure 6 This is a schematic diagram of a steam condensation assembly according to an embodiment of this application; Figure 7 This is a cross-sectional view of a steam condensation assembly according to an embodiment of this application.

[0019] The reference numerals in the attached figures are as follows: 1. Sealing cover assembly; 11. Sealing cover; 12. Sealing strip; 13. Sealing cover sealing surface; 14. Thermal insulation layer; 2. Flexible locking assembly; 21. Locking ring; 22. Bending groove; 23. Boss; 24. Locking rod interface; 25. Remote locking rod; 3. Steam condensation assembly; 31. Steam cooler; 3101. Heat sink; 3102. Coolant filling chamber; 3103. Steam cavity; 32. Negative pressure generator; 33. Steam overflow pipe section; 34. Medium outlet pipe section; 35. Pressure measuring element; 36. Metal transition pipe; 4. Packing structure valves; 5. Steam pipes; 6. Insulation layer; 7. Location of steam leak. Detailed Implementation

[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] See also Figures 1 to 7 As shown in the embodiment of this application, an emergency treatment device for external leakage of a steam system packing structure valve is provided, including a sealing cover assembly 1, a flexible locking assembly 2, and a steam condensing assembly 3; the sealing cover assembly 1 is provided with flexible locking assemblies 2 at both ends, and the flexible locking assemblies 2 are sleeved on the steam pipe 5 so that the sealing cover assembly 1 covers the packing structure valve 4 located on the steam pipe 5; the steam condensing assembly 3 is connected to the sealing cover assembly 1 to cool and discharge the leaked steam.

[0025] By wrapping the sealing cover assembly 1 around the packing structure valve 4 and using the remotely operated flexible locking assembly 2, the sealing cover assembly 1 can be pressed tightly at the remote end through the flexible locking assembly 2, thus enclosing the steam-leaking packing structure valve 4 inside the sealing cover assembly 1. This eliminates the production delays and cost losses caused by the shutdown of the main steam system without the need to stop the machine or cut off the main steam system. At the same time, it can completely avoid the high-temperature burns to personnel caused by leaked steam, as well as the temperature and humidity damage to surrounding equipment and instruments.

[0026] The sealing cover assembly 1 is cylindrical in shape, with flexible locking components 2 at both ends. Specifically, flexible locking components 2 are located on both end faces of the sealing cover assembly 1 and are coaxially arranged with it. This allows the flexible locking components 2 to be fitted onto the steam pipe 5, thereby placing the packing structure valve 4 inside the sealing cover assembly 1. In the event of steam leakage, the flexible locking components 2 on both sides of the sealing cover assembly 1 are used to press it shut from both sides, ensuring the sealing performance of the sealing cover assembly 1 and preventing high-temperature steam from leaking into the external environment.

[0027] The steam condensation component 3 is connected to the sealing cover component 1, meaning that gas or liquid can flow between the sealing cover component 1 and the steam condensation component 3. When the packing structure valve 4 experiences high-temperature steam leakage, the steam leakage is temporarily stored in the sealing cover component 1 to prevent leakage to the external environment, and then discharged after being cooled down by the steam condensation component 3.

[0028] In another embodiment, the sealing cover assembly 1 includes a sealing cover 11 and a sealing strip 12. The sealing cover 11 is hollow inside to form a packing structure valve mounting cavity. Steam pipe through holes are opened on both ends of the sealing cover 11. A sealing cover opening is provided on the circumferential sidewall of the sealing cover 11. The sealing cover opening penetrates the circumferential sidewall along the axial and radial directions of the sealing cover 11 and communicates with the steam pipe through holes. A sealing strip 12 is provided inside the sealing cover opening.

[0029] The sealing cover 11 has a cylindrical structure and its interior is hollow to form a packing structure valve mounting cavity, which is used to enclose the packing structure valve 4 inside the packing structure valve mounting cavity.

[0030] Specifically, the volume of the installation cavity of the packing structure valve is larger than that of the packing structure valve 4, so that the space other than the installation cavity of the packing structure valve 4 can form a temporary storage cavity for leaking high-temperature steam, so as to seal the high-temperature steam in the sealing cover 11 and prevent it from leaking into the atmosphere.

[0031] Specifically, the sealing cover 11 is made of a flexible, high-temperature resistant material.

[0032] Among them, steam pipe through holes are opened on both ends of the sealing cover 11, and the hole wall of the steam pipe through hole forms the sealing surface 13 of the sealing cover; the steam pipe 5 and the packing structure valve 4 are both wrapped with heat insulation layer 6; the sealing surface 13 of the steam pipe through hole is directly attached to the outer surface of the heat insulation layer 6, and the sealing cover 11 is fitted on the steam pipe 5.

[0033] Specifically, the insulation layer 6 and the steam pipe 5 are fitted with a gap. The gap effectively blocks the thermal bridge and reduces the heat loss through direct contact between the insulation layer 6 and the steam pipe 5, so that the insulation function of the insulation layer 6 can be fully utilized, thereby reducing the energy loss in the steam transportation process.

[0034] Among them, the insulation layer 6 and the packing structure valve 4 form a steam leakage position 7 at the handwheel. When high-temperature steam leakage occurs, the high-temperature steam flows out from the steam leakage position 7 and enters the sealing cover 11.

[0035] The sealing cover 11 has a sealing cover opening on its circumferential sidewall. The sealing cover opening extends through the circumferential sidewall along the axial and radial directions of the sealing cover 11 and communicates with the through hole of the steam pipe. The arrangement of the sealing cover opening allows the sealing cover 11 to be fitted onto the steam pipe 5, so that the sealing surface 13 of the sealing cover at the through hole of the steam pipe is in contact with the outer surface of the insulation layer 6. A sealing strip 12 is provided inside the sealing cover opening, and the sealing strip 12 and the sealing cover 11 are integrally formed.

[0036] Specifically, in this embodiment, the sealing cover has an opening, which is used to form an open end so that the sealing cover 11 can be fitted onto the steam pipe 5.

[0037] In another embodiment, the sealing strip 12 is serrated, and the surfaces of the sealing cover openings arranged opposite each other are respectively provided with sealing strips 12, and the teeth of one sealing strip 12 engage with the grooves of the other sealing strip 12.

[0038] The sealing cover opening has two sealing strips 12 arranged on opposite surfaces. The sealing strips 12 are arranged radially and axially on the surface of the sealing cover opening, with the teeth of one sealing strip 12 engaging with the grooves of the other sealing strip 12. By providing axially arranged serrated sealing strips 12 at the sealing cover opening, axial displacement of the sealing cover 11 at the opening is prevented. At the same time, radially arranged sealing strips 12 at the sealing cover opening prevent radial displacement of the sealing cover 11 at the opening, ensuring a sealing effect. The serrated sealing strips 12 also increase the sealing area, further improving the sealing effect of the sealing cover 11.

[0039] In another embodiment, the sealing cover assembly 1 further includes a heat insulation layer 14, and the sealing cover 11 has an internal interlayer space, in which the heat insulation layer 14 is disposed.

[0040] The sealing cover 11 has an internal interlayer space, with interlayer spaces also located on the outer peripheral wall and inside the end plate of the sealing cover 11. A heat insulation layer 14 is installed within each interlayer space and is fixed therein by adhesive. To avoid thermal bridging, the heat insulation layer 14 is adhered to the middle portion of the interlayer space, creating gaps between the heat insulation layer 14 and the interlayer space near the outer wall of the sealing cover 11, and between the heat insulation layer 14 and the interlayer space near the inner wall of the sealing cover 11. The heat insulation layer 14 prevents the heat from the high-temperature steam inside the sealing cover 11 from being conducted to the external environment.

[0041] In another embodiment, the flexible locking assembly 2 includes a locking ring 21 and a remote locking rod 25. The locking ring 21 is connected to the sealing cover assembly 1. The locking ring 21 is provided with a locking ring opening. At least two locking rod interfaces 24 are provided on the outer peripheral surface of the locking ring 21 on both sides of the locking ring opening. The remote locking rod 25 is provided in the locking rod interface 24.

[0042] The locking ring 21 has a locking ring opening and is located at the end face of the sealing cover 11 of the sealing cover assembly 1, while ensuring that the locking ring opening of the locking ring 21 is connected to the sealing cover opening of the sealing cover 11.

[0043] Specifically, the locking ring 21 is installed at the steam pipe through hole on the end face of the sealing cover 11, and is coaxial with the steam pipe through hole and has the same hole diameter.

[0044] Specifically, the locking ring 21 and the sealing cover 11 are made of the same material, so that the locking ring 21 can be integrally formed with the sealing cover 11 of the sealing cover assembly 1, reducing the processing difficulty and ensuring the sealing of the connection.

[0045] Among them, at least two locking rod interfaces 24 are provided on the outer peripheral surface of the locking ring 21 on both sides of the locking ring opening. The two locking rod interfaces 24 are symmetrically arranged on the outer peripheral surface of the locking ring 21 with the locking ring opening as the center of symmetry, so as to ensure that the clamping force applied on both sides of the locking ring 21 is consistent when the sealing cover 11 is pressed by the locking ring 21.

[0046] Specifically, the locking rod interface 24 is a metal tube, which is installed on the locking ring 21 by embedding or gluing.

[0047] Specifically, the inner wall of the locking rod interface 24 is machined with internal threads, and at least one end of the remote locking rod 25 is machined with external threads, so that the remote locking rod 25 is connected to the locking rod interface 24 by means of threaded connection.

[0048] Specifically, in this embodiment, in order to facilitate the screwing of the remote locking rod 25 to the locking rod interface 24 in a confined space, three locking rod interfaces 24 are provided on the outer peripheral surface of the locking ring 21 on each side of the locking ring opening.

[0049] In another embodiment, the inner wall of the locking ring 21 is provided with a plurality of curved grooves 22 along the circumferential direction, and a boss 23 is formed between adjacent curved grooves 22.

[0050] The inner wall of the locking ring 21 is provided with multiple curved grooves 22 along the axial direction, and the curved grooves 22 penetrate the end face of the locking ring 21 along the width direction of the locking ring 21. When the locking ring 21 is locked, its inner wall will undergo extrusion deformation due to its small diameter. The curved grooves 22 can directly accommodate this deformation allowance, avoiding irregular deformation of the inner wall due to lack of accommodation space, preventing the sealing surface from forming a non-standard circle, reducing gap formation from the root, and ensuring the sealing effect. At the same time, the accommodating effect of the curved grooves 22 on the deformation allowance reduces the obstruction caused by the deformation of the inner wall during the locking process, making the operation of the remote locking rod 25 smoother, without the need for additional adjustment of the deformed parts, and indirectly improving the locking efficiency of the device.

[0051] In another embodiment, the steam condensation assembly 3 includes a steam cooler 31, a negative pressure generator 32, a steam overflow pipe section 33, and a medium outlet pipe section 34. The inlet of the steam cooler 31 is connected to the sealing cover assembly 1 through the steam overflow pipe section 33, the outlet of the steam cooler 31 is connected to the inlet of the negative pressure generator 32 through a connecting pipe, and the medium outlet pipe section 34 is connected to the negative pressure generator 32.

[0052] The sealing cover assembly 1 has a through hole on its outer peripheral surface. The inlet of the steam overflow pipe section 33 is connected to the through hole of the sealing cover 11, so that the leaking high-temperature steam inside the sealing cover 11 can flow into the steam overflow pipe section 33 through the through hole. The outlet of the steam overflow pipe section 33 is connected to the inlet end of the steam cooler 31, so that the leaking high-temperature steam is transported to the steam cooler 31 through the steam overflow pipe section 33 for cooling.

[0053] Specifically, the steam overflow pipe section 33 and the sealing cover 11 are connected by adhesive. In this embodiment, the steam overflow pipe section 33 is a high-temperature resistant flexible pipe.

[0054] The outlet of the steam cooler 31 is connected to the inlet of the negative pressure generator 32 through a connecting pipe, and the medium outlet pipe section 34 is connected to the negative pressure generator 32. The connecting pipe is a transition pipe section that connects the steam cooler 31 and the negative pressure generator 32. It is used to allow the gas or liquid that has been cooled by the steam cooler 31 to enter the negative pressure generator 32 through the connecting pipe and be discharged through the medium outlet pipe section 34.

[0055] Specifically, the negative pressure generator 32 is an axial flow fan.

[0056] The steam cooler 31 has an internal cavity with a large volume, which can significantly reduce the flow rate of high-temperature steam entering the steam cooler 31, prolong the residence time of steam in the steam cooler 31, create conditions for heat exchange, and thus improve the cooling efficiency of steam.

[0057] The specific implementation process of the steam condensation assembly 3 is as follows: During operation, after the axial flow fan starts, it draws air outward through the medium outlet pipe section 34, creating a slightly negative pressure environment relative to atmospheric pressure inside the sealing cover 11, the steam overflow pipe section 33, and the steam cooler 31. This provides power for the sealing cover 11 to collect leaked high-temperature steam and prevents high-temperature steam from overflowing from the sealing gap of the sealing cover 11. Under the action of negative pressure, the high-temperature steam inside the sealing cover 11 flows into the steam cooler 31 through the steam overflow pipe section 33 and is cooled down to form low-temperature gas (or condensate). Under the continuous suction of the axial flow fan, it is stably discharged through the medium outlet pipe section 34.

[0058] In another embodiment, the steam condensation assembly 3 further includes a pressure measuring element 35 disposed on the steam overflow pipe section 33.

[0059] Among them, a metal transition pipe 36 is installed on the steam overflow pipe section 33 by embedding or gluing, and the pressure measuring element 35 is installed on the metal transition pipe 36 by threaded connection, which is used to monitor the micro negative pressure conditions inside the sealing cover 11.

[0060] Specifically, in this embodiment, the pressure measuring element 35 is a pressure gauge.

[0061] In another embodiment, the internal cavity of the steam cooler 31 forms a steam cavity 3103, and the outer surface of the steam cooler 31 is provided with heat sink 3101, which is a protruding structure that does not penetrate the wall thickness of the steam cooler 31.

[0062] Among them, the heat sink 3101 is only processed and formed on the outer surface of the steam cooler 31 and does not penetrate the wall thickness of the steam cooler 31. While increasing the heat dissipation area, it ensures the integrity of the inner wall of the steam cooler 31 and guarantees the sealing performance and structural strength of the steam cooler 31.

[0063] Specifically, the steam cooler 31 has a cylindrical or rectangular main structure, and the heat dissipation fins 3101 are evenly arranged around the outer surface (that is, except for the outer surface where the steam overflow pipe section 33 and the connecting pipe are installed, the other surfaces are provided with heat dissipation fins 3101), maximizing the coverage of the outer surface of the steam cooler 31 and ensuring the heat dissipation capacity of the steam cooler 31.

[0064] In another embodiment, a coolant filling cavity 3102 is provided inside the side wall of the steam cooler 31, and the coolant filling cavity 3102 is filled with coolant.

[0065] The steam cooler 31 has a coolant filling cavity 3102 inside its side wall. That is, the side wall corresponding to the heat sink 3101 is provided with a coolant filling cavity 3102 along the circumference, and the coolant filling cavity 3102 is filled with coolant.

[0066] Specifically, in this embodiment, the coolant is in a closed, non-flowing state.

[0067] The high-temperature steam entering the cavity of the steam cooler 31 comes into direct contact with the closed, non-flowing coolant. The coolant absorbs heat from the steam through heat conduction, causing an initial decrease in steam temperature; some steam may condense into a liquid state. During this process, the coolant remains stationary, temporarily storing heat only through its own heat capacity. After absorbing heat, the coolant conducts it to the heat sink 3101, which then rapidly dissipates the heat into the atmosphere through convection and radiation, lowering the coolant temperature and restoring its heat absorption capacity, thus forming a continuous heat exchange cycle.

[0068] The specific implementation process of the emergency treatment device for external leakage of steam system packing structure valves is as follows: When steam is found to be leaking from steam leak point 7 due to packing damage in packing valve 4, immediately set packing valve 4 to an inoperable state to prevent personnel from being burned by high-temperature steam. Simultaneously, avoid rotating packing valve 4, as this could lead to further packing damage and increased leakage. Start negative pressure generator 32 and maintain continuous operation. Confirm that the external leakage treatment device is in a slightly negative pressure state relative to atmospheric pressure using pressure measuring device 35. Simultaneously check whether there is gas or liquid flowing out of medium outlet pipe section 34 to ensure that the initial function of steam condensation assembly 3 is normal.

[0069] Based on the spatial location of the leaking packing structure valve 4 and steam pipeline 5, select a suitable locking rod interface 24, and tighten the remote locking rod 25 to the locking rod interface 24 via a threaded connection. Under slight negative pressure, the operator operates the remote locking rod 25 to ensure a tight fit with the sealing strip 12, precisely wrapping the sealing cover 11 around the leaking area of ​​the externally leaking packing structure valve 4. If the space at the leak location is complex, the number of remote locking rods 25 can be increased to assist in wrapping, ensuring that the sealing cover 11 completely covers the externally leaking packing structure valve 4.

[0070] Check that there are no obvious gaps between the sealing surface 13 of the sealing cover 11 and the insulation layer 6 to prevent steam leakage from the sealing gap. Verify again through the side pressure component 35 that the external leakage emergency handling device maintains a slight negative pressure state. Simultaneously check that the steam cooler 31 is operating normally and that there is low-temperature gas or liquid flowing out of the medium outlet pipe section 34, ensuring that the leaked steam has been properly handled according to the collection, cooling, and discharge procedures. After all checks are completed, use ropes or other tools to lock and secure the end of the remote locking rod 25 to prevent the equipment from shifting during operation and ensure continuous sealing.

[0071] A non-flowing liquid coolant is added to the side wall of the steam cooler 31 to realize a heat transfer path of steam-liquid coolant-atmosphere, thereby improving heat dissipation efficiency. The use of a non-flowing liquid coolant avoids the additional system complexity caused by external liquid coolant, and realizes the portability of the equipment.

[0072] Through the effective coordination of the sealing cover assembly 1, the flexible locking assembly 2, and the steam condensation assembly 3, reactor shutdowns or system isolation due to leaks from non-critical equipment in non-critical systems are avoided. This also prevents "operation with defects" during steam leaks and avoids harm to personnel and surrounding equipment from leaking high-temperature steam. It overcomes engineering challenges such as limited space, complex pipeline layouts, and poor accessibility at steam leak sites, reducing the operating costs of reactor shutdowns and gas outages caused by leaks. The applicable packing valves mainly include small, manually operated valves such as vent valves, drain valves, blowdown valves, sampling valves, instrument valves, pressure tapping valves, and shut-off valves. Simultaneously, the external leakage emergency treatment device can also be applied in other temporary steam leak handling applications.

[0073] Employing a purely mechanical structure, it can be operated remotely. The main body uses a high-temperature resistant flexible structure, facilitating use in confined spaces, at heights, pits, and other hard-to-reach areas; it also ensures a tight seal between the device and the insulation layer 6, protecting the insulation layer 6 from secondary damage. This device is designed for temporary emergency repairs, therefore it features lightweight construction, ease of use, simple structure, and stable performance.

[0074] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. An emergency treatment device for external leakage of a steam system packing structure valve, characterized in that, include: Sealing cover assembly (1); Flexible locking assembly (2); Flexible locking assemblies (2) are respectively provided at both ends of the sealing cover assembly (1). The flexible locking assemblies (2) are sleeved on the steam pipe (5) so that the sealing cover assembly (1) wraps the packing structure valve (4) located on the steam pipe (5). Steam condensation assembly (3); the steam condensation assembly (3) is connected to the sealing cover assembly (1) to cool and discharge leaked steam.

2. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 1, characterized in that, The sealing cover assembly (1) includes a sealing cover (11) and a sealing strip (12). The sealing cover (11) is hollow inside to form a packing structure valve mounting cavity. Steam pipe through holes are opened on both ends of the sealing cover (11). A sealing cover opening is provided on the circumferential side wall of the sealing cover (11). The sealing cover opening penetrates the circumferential side wall along the axial and radial directions of the sealing cover (11) and communicates with the steam pipe through hole. A sealing strip (12) is provided inside the sealing cover opening.

3. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 2, characterized in that, The sealing strip (12) is serrated, and the sealing cover openings are respectively provided with the sealing strip (12) on their opposite surfaces, with the teeth of one sealing strip (12) engaging with the grooves of the other sealing strip (12).

4. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 2, characterized in that, The sealing cover assembly (1) further includes a heat insulation layer (14), and the sealing cover (11) has an internal interlayer space, in which the heat insulation layer (14) is disposed.

5. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 1, characterized in that, The flexible locking assembly (2) includes a locking ring (21) and a remote locking rod (25). The locking ring (21) is connected to the sealing cover assembly (1). The locking ring (21) is provided with a locking ring opening. At least two locking rod interfaces (24) are provided on the outer peripheral surface of the locking ring (21) on both sides of the locking ring opening. The remote locking rod (25) is provided in the locking rod interface (24).

6. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 5, characterized in that, The inner wall of the locking ring (21) is provided with a plurality of curved grooves (22) along the circumferential direction, and a boss (23) is formed between adjacent curved grooves (22).

7. The emergency treatment device for external leakage of a steam system packing structure valve according to claim 1, characterized in that, The steam condensation assembly (3) includes a steam cooler (31), a negative pressure generator (32), a steam overflow pipe section (33), and a medium outlet pipe section (34). The inlet of the steam cooler (31) is connected to the sealing cover assembly (1) through the steam overflow pipe section (33), the outlet of the steam cooler (31) is connected to the inlet of the negative pressure generator (32) through the connecting pipe, and the medium outlet pipe section (34) is connected to the negative pressure generator (32).

8. An emergency treatment device for external leakage of a steam system packing structure valve according to claim 7, characterized in that, The steam condensation assembly (3) also includes a pressure measuring element (35), which is disposed on the steam overflow pipe section (33).

9. An emergency treatment device for external leakage of a steam system packing structure valve according to claim 7, characterized in that, The internal cavity of the steam cooler (31) forms a steam cavity (3103), and the outer surface of the steam cooler (31) is provided with heat sinks (3101), which are protruding structures that do not penetrate the wall thickness of the steam cooler (31).

10. An emergency treatment device for external leakage of a steam system packing structure valve according to claim 9, characterized in that, The steam cooler (31) has a coolant filling chamber (3102) inside its side wall, and the coolant filling chamber (3102) is filled with coolant.

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