Extraction device

Abstract

The application belongs to the technical field of valve maintenance, and particularly relates to a taking-out device suitable for taking out a lantern ring of a valve. The taking-out device comprises an adjusting assembly and a pulling-out assembly. The adjusting assembly comprises a first connecting rod, a second connecting rod and an adjusting plate. One end of the first connecting rod and one end of the second connecting rod are used for being connected with opposite sides of the lantern ring. At least one of the other end of the first connecting rod and the other end of the second connecting rod is movably connected with the adjusting plate, so that the distance between the first connecting rod and the second connecting rod is adjustable. The pulling-out assembly comprises a pulling rod and a pulling driving element. The pulling driving element is located on the side of the adjusting plate away from the lantern ring. One end of the pulling rod is connected with the adjusting plate, and the other end of the pulling rod is connected with the pulling driving element. The pulling driving element is used for driving the pulling rod to move in the direction away from the adjusting plate. The taking-out device can improve the maintenance efficiency and the maintenance quality of the lantern ring.

Description

Technical Field

[0001] This application belongs to the field of valve maintenance technology, and in particular relates to a removal device. Background Technology

[0002] In nuclear power plant valve systems, the lantern ring is a crucial component. It is installed within the valve's packing gland, which houses the valve stem. The lantern ring is fitted over the valve stem, and packing is located on both its upper and lower sides to seal the packing gland. During nuclear power plant maintenance, the lantern ring needs to be removed from the packing gland for replacement or repair. Removal primarily relies on two methods: pulling out with a screw and reverse tapping. However, these methods are not ideal for safely and efficiently removing the lantern ring from the valve, hindering maintenance efficiency and quality.

[0003] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0004] The purpose of this application is to provide a removal device that can improve the maintenance efficiency and quality of lantern rings.

[0005] The technical solution adopted in this application embodiment is: a removal device suitable for removing the lantern ring of a valve. The removal device includes an adjustment assembly and a pull-out assembly. The adjustment assembly includes a first connecting rod, a second connecting rod, and an adjustment plate. One end of the first connecting rod and one end of the second connecting rod are used to connect to opposite sides of the lantern ring. At least one of the other ends of the first and second connecting rods is movably connected to the adjustment plate so that the distance between the first and second connecting rods is adjustable. The pull-out assembly includes a pull rod and a pulling drive. The pulling drive is located on the side of the adjustment plate facing away from the lantern ring. One end of the pull rod is connected to the adjustment plate, and the pulling drive is connected to the other end of the pull rod. The pulling drive is used to drive the pull rod to move in the direction facing away from the adjustment plate.

[0006] Optionally, the pull-out assembly also includes a retainer for connection to the valve, and the pull drive is connected to the retainer.

[0007] Optionally, the pull drive component includes a rotating sleeve and a rotating handle. The rotating sleeve is sleeved on the outside of the pull rod and screwed to the pull rod. The rotating sleeve is rotatably connected to the fixed frame so that the rotating sleeve can rotate around the axis of the pull rod. The rotating sleeve is fixedly connected to the rotating handle.

[0008] Optionally, the pull drive component includes a limiting sleeve, a fixing bracket with a mounting hole, a pull rod passing through the mounting hole, a flange at the end of the rotating screw sleeve facing the adjusting plate, the flange being located inside the mounting hole, the inner wall surface of the mounting hole having a first stepped surface, the limiting sleeve being sleeved on the outside of the pull rod and screwed to the mounting hole, the flange being located between the first stepped surface and the limiting sleeve; the distance between the limiting sleeve and the first stepped surface is greater than the thickness of the flange.

[0009] Optionally, the mounting bracket also includes a mounting sleeve, two support rods, and two crossbars. The mounting sleeve has mounting holes and is connected between the two crossbars. The two support rods are located on opposite sides of the pull rod. One end of the two support rods is used to support the valve, and the other end of the two support rods is movably connected to the two crossbars respectively, so that the distance between the two support rods is adjustable.

[0010] Optionally, the mounting bracket is provided with a rotating screw hole, and the pull drive component is screwed into the rotating screw hole.

[0011] Optionally, the pull drive component includes a rotating sleeve and a movable sleeve. The pull rod is sleeved outside the valve stem of the valve, and the rotating sleeve is sleeved outside the valve stem of the valve. The pull rod is connected to the rotating sleeve and located between the rotating sleeve and the adjusting plate. The movable sleeve is sleeved outside the rotating sleeve. The rotating sleeve can rotate relative to the movable sleeve. The movable sleeve is screwed into the rotating screw hole to push the rotating sleeve to move in the direction away from the adjusting plate.

[0012] Optionally, the removal device further includes a first guide sleeve, which is sleeved outside the valve stem and located inside the rotating sleeve, and / or the removal device further includes a second guide sleeve, which is sleeved outside the valve stem and located inside the pull rod.

[0013] Optionally, the pull drive component includes a blocking component and a hammer. The hammer is sleeved outside the pull rod. The blocking component is connected to one end of the pull rod facing away from the adjusting plate. The hammer is located between the adjusting plate and the blocking component. The hammer is used to strike the blocking component along the pull rod axis to drive the pull rod to move away from the adjusting plate.

[0014] Optionally, the adjusting plate is provided with a first adjusting hole and a second adjusting hole, the first adjusting hole and the second adjusting hole extend radially along the pull rod, the first connecting rod passes through the first adjusting hole and can move along the extension direction of the first adjusting hole, and the second connecting rod passes through the second adjusting hole and can move along the extension direction of the second adjusting hole.

[0015] The extraction device provided in this application has at least one of the following technical effects: In use, the extraction device of this application connects one end of the first connecting rod and one end of the second connecting rod to the opposite sides of the lantern ring, and then drives the pull rod to move in the direction away from the adjusting plate, thereby moving the first and second connecting rods and pulling the lantern ring out of the packing gland. During this process, the opposite sides of the lantern ring are subjected to the tension of the first and second connecting rods, reducing the risk of the lantern ring becoming skewed, reducing the risk of damage to the lantern ring and the packing gland, and improving the safety of lantern ring disassembly. Compared with directly pulling the screw to pull out the lantern ring, operating the pull rod to move it in the direction away from the adjusting plate is simpler and less strenuous, which helps to reduce the difficulty and efficiency of lantern ring disassembly. The distance between the first and second connecting rods is adjustable, allowing the extraction device to meet the disassembly requirements of lantern rings of different diameters, thus meeting the disassembly needs of different valves and improving the versatility of the extraction device. The extraction device of this application can efficiently and safely extract the lantern ring, which helps to improve maintenance efficiency and quality.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 Schematic diagram of the structure of the extraction device provided in some embodiments of this application installed in the valve state. Figure 1 .

[0019] Figure 2 for Figure 1 The diagram shows the structure of the extraction device installed in the valve position. Figure 2 .

[0020] Figure 3 For along Figure 2 A cross-sectional view along line AA in the diagram.

[0021] Figure 4 for Figure 3 A magnified view of point B in the image.

[0022] Figure 5 for Figure 3 A magnified view of point C in the image.

[0023] Figure 6 for Figure 2 An exploded view of the extraction device and valves.

[0024] Figure 7 Schematic diagram of the structure of the extraction device provided in other embodiments of this application, installed in the valve state. Figure 1 .

[0025] Figure 8 for Figure 7 The diagram shows the structure of the extraction device installed in the valve position. Figure 2 .

[0026] Figure 9 For along Figure 8 A cross-sectional view of the DD line.

[0027] Figure 10 for Figure 8 An exploded view of the extraction device.

[0028] Figure 11 Schematic diagram of the structure of the extraction device provided in some embodiments of this application installed in the valve state. Figure 1 .

[0029] The following are the labeling elements in the figure:

[0030] 100. Removal device; 110. Adjustment assembly; 111. First connecting rod; 112. Second connecting rod; 113. Adjustment plate; 1131. First adjustment hole; 1132. Second adjustment hole; 114. First locking nut; 115. Second locking nut; 120. Pull-out assembly; 121. Pull rod; 1211. Connecting nut; 122. Pull drive component; 1221. Fixing bracket; 12211. Mounting sleeve; 12212. Support rod; 12213. Crossbar; 12214. Mounting hole; 12215. First stepped surface; 12216. Rotating screw hole; 12217. Fastening bolt; 12218. Fixing sleeve; 12219. Connecting part; 12220. Adjustment hole; 1222. Rotating screw hole 12221, Flange; 12222, Limiting sleeve; 1223, Rotating handle; 12231, Operating lever; 12232, Connecting hole; 12233, Fixing nut; 1224, Rotating sleeve; 12241, Rotating handle; 12242, Blocking nut; 12243, First rolling bearing plate; 12244, Second stepped surface; 12245, Second rolling bearing plate; 1225, Moving sleeve; 12251, Applying force handle; 1226, First guide sleeve; 1227, Second guide sleeve; 1228, Blocking element; 1229, Hand hammer; 200, Valve; 201, Packing gland; 210, Lantern ring; 211, Annular space; 212, Drainage hole; 220, Yoke; 230, Valve stem. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of the embodiments of this application, 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 indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0033] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0037] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0038] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0039] In nuclear power plant valve systems, lantern rings play multiple crucial roles. From a sealing perspective, they work with other components to enhance valve tightness, ensuring that radioactive media do not leak and guaranteeing the safe operation of the nuclear power plant. Regarding compensation, their flexibility and extensibility effectively address thermal expansion and contraction and displacement caused by temperature and pressure changes in pipelines and valves, preventing equipment damage due to stress concentration. They also provide cushioning and shock absorption, absorbing vibrations and impacts generated during operation, reducing the impact on valves and related equipment, and isolating the internal media from the external environment to prevent impurities from entering and the media from reacting with the outside. Most importantly, in terms of leakage control, they are located between the upper and lower packing glands. When media leaks from the lower packing gland, it is collected in the annular space within the lantern ring. The pressure difference created by the annular space and the leakage pipe on the valve cover guides the leaking media out through the leakage pipe. This media is then collected through pipelines and transported to the waste treatment system, preventing the leakage of radioactive media into the environment and comprehensively ensuring the safe and stable operation of the nuclear power plant.

[0040] In the field of nuclear power valve maintenance, the removal of the lantern ring mainly relies on two methods: pulling out the lead screw and knocking in the opposite direction.

[0041] The method of pulling out the lantern ring involves directly screwing the screw into the drainage hole on one side of the lantern ring. Then, a person holds the other end of the screw and pulls it to remove the lantern ring. This method is effective when the valve is in good working condition, the inner wall of the packing gland is smooth, without obvious deformation or corrosion, and the lantern ring and packing gland fit properly. The principle is simple and easy for maintenance personnel to master. However, when the valve is under harsh conditions of high temperature, high pressure, strong corrosion, and frequent thermal expansion and contraction, the inner wall of the packing gland may deform, corrode, or develop burrs, making it difficult for the screw to pull out the lantern ring and significantly reducing the removal effectiveness.

[0042] Reverse tapping is a simple and direct emergency method commonly used on-site, allowing for quick removal attempts in situations lacking specialized tools or in urgent emergencies. However, this method relies entirely on manual experience, making it difficult to precisely control the force and direction of the tapping. It is highly susceptible to damage to the lantern ring due to excessive force or directional deviation, compromising its structural integrity and sealing performance, and potentially causing irreversible damage to the packing gland.

[0043] In practice, both methods—pulling the lantern ring out from one side with the lead screw and striking the lantern ring in the opposite direction—can lead to damage to the lantern ring and packing gland due to unilateral misalignment. These methods are detrimental to maintenance efficiency and cannot guarantee the safety of components during dismantling, hindering the smooth progress of nuclear power plant maintenance. Therefore, how to safely and efficiently dismantle the lantern ring is an important research topic.

[0044] Based on this, this application provides a removal device. In use, one end of the first connecting rod and one end of the second connecting rod are respectively connected to the opposite sides of the lantern ring. Then, the pull drive is driven to move the pull rod in the direction away from the adjusting plate, thereby moving the first connecting rod and the second connecting rod, and thus pulling the lantern ring out of the packing gland. During this process, the opposite sides of the lantern ring are subjected to the tension of the first connecting rod and the second connecting rod, reducing the risk of the lantern ring becoming skewed, reducing the risk of damage to the lantern ring and the packing gland, and improving the safety of lantern ring disassembly. The operation method of using the pull drive to move the pull rod in the direction away from the adjusting plate is simple and labor-saving, which helps to reduce the difficulty and efficiency of lantern ring disassembly. The distance between the first connecting rod and the second connecting rod is adjustable, so that the removal device can meet the disassembly requirements of lantern rings of different diameters.

[0045] The following combination Figures 1-11 The extraction device 100 of the present application embodiment will be described.

[0046] like Figures 1-6 As shown, the removal device 100 is adapted to remove the lantern ring 210 of the valve 200. The removal device 100 includes an adjustment assembly 110 and a pull-out assembly 120. The adjustment assembly 110 includes a first connecting rod 111, a second connecting rod 112, and an adjustment plate 113. One end of the first connecting rod 111 and one end of the second connecting rod 112 are used to connect to opposite sides of the lantern ring 210. At least one of the other ends of the first connecting rod 111 and the second connecting rod 112 is movably connected to the adjustment plate 113 so that the distance between the first connecting rod 111 and the second connecting rod 112 is adjustable. The pull-out assembly 120 includes a pull rod 121 and a pull drive member 122. The pull drive member 122 is located on the side of the adjustment plate 113 facing away from the lantern ring 210. One end of the pull rod 121 is connected to the adjustment plate 113, and the pull drive member 122 is connected to the other end of the pull rod 121. The pull drive member 122 is used to drive the pull rod 121 to move in a direction away from the adjustment plate 113.

[0047] See Figure 3 and Figure 4 As shown, the lantern ring 210 is installed inside the packing gland 201 of the valve 200. The lantern ring 210 has a circular ring structure, and packing is provided on the upper and lower sides of the lantern ring 210. The packing is located inside the packing gland 201 to seal the packing gland 201. The lantern ring 210 has an annular space 211 inside and a drainage hole 212 communicating with the annular space 211. Drainage holes 212 are provided on both sides of the annular space 211. The drainage holes 212 can guide the medium in the annular space 211 to the leakage pipe and flow out from the leakage pipe. Then, these media are collected through pipelines and transported to the waste treatment system to prevent the leakage of radioactive media into the environment and comprehensively ensure the safe and stable operation of the nuclear power plant.

[0048] The first connecting rod 111 and the second connecting rod 112 can refer to components that are respectively connected to the opposite sides of the lantern ring 210. The connection between the first connecting rod 111 and the second connecting rod 112 and the lantern ring 210 can be by screwing, bonding, snapping, etc.; the first connecting rod 111 and the second connecting rod 112 can be straight rods.

[0049] For example, the ends of the first connecting rod 111 and the second connecting rod 112 are respectively screwed into the drainage holes 212 on opposite sides of the lantern ring 210. This allows for direct connection using the drainage holes 212 of the lantern ring 210 without the need for additional drilling. This simplifies the connection operations between the first connecting rod 111 and the lantern ring 210, as well as between the second connecting rod 112 and the lantern ring 210, and improves the disassembly efficiency of the lantern ring 210.

[0050] Adjusting plate 113 can refer to a component that is movably connected to the first connecting rod 111 and the second connecting rod 112. Adjusting plate 113 is movably connected to the first connecting rod 111, or the second connecting rod 112 is movably connected to the adjusting plate 113, or both the first connecting rod 111 and the second connecting rod 112 are movably connected to the adjusting plate 113, so that the distance between the first connecting rod 111 and the second connecting rod 112 is adjustable. The first connecting rod 111 and the second connecting rod 112 can be connected to lantern rings 210 of different diameters. The removal device 100 can meet the disassembly requirements of lantern rings 210 of valves 200 of different sizes, and the removal device 100 has good versatility.

[0051] In some examples, the first connecting rod 111 and the adjusting plate 113 are movably connected via a nut and an elongated hole. The first connecting rod 111 passes through the elongated hole and is then screwed onto the nut. The nut prevents the first connecting rod 111 from coming out of the elongated hole. Simultaneously, the first connecting rod 111 can move along the extension direction of the elongated hole, thereby adjusting the distance between the first connecting rod 111 and the second connecting rod 112. Two nuts can be used, with the adjusting plate 113 positioned between them. By tightening the two nuts, the first connecting rod 111 can be fixed in a preset position within the elongated hole, facilitating the subsequent pulling out of the lantern ring 210.

[0052] The second connecting rod 112 and the adjusting plate 113 can be movably connected via a nut and an elongated hole. For example, the second connecting rod 112 passes through the elongated hole and is then screwed onto the nut. The nut prevents the second connecting rod 112 from coming out of the elongated hole. Simultaneously, the second connecting rod 112 can move along the extension direction of the elongated hole, thus allowing the distance between the second connecting rod 112 and the elongated hole to be adjustable. Two nuts can be used, with the adjusting plate 113 positioned between them. By tightening the two nuts, the second connecting rod 112 can be fixed in a preset position within the elongated hole, facilitating the subsequent pulling out of the lantern ring 210.

[0053] The pull-out assembly 120 can refer to the component used to drive the first connecting rod 111 and the second connecting rod 112 to move, so as to pull the lantern ring 210 out of the packing box 201. The pull-out assembly 120 includes a pull rod 121 and a pulling drive component 122. The pull rod 121 can refer to the component that connects the adjusting plate 113 and the pulling drive component 122. The pull rod 121 and the adjusting plate 113 can be connected by fasteners such as bolts and screws, as well as by snap-fitting, adhesive bonding, etc.

[0054] For example, the end of the pull rod 121 passes through the adjusting plate 113 and is screwed into the nut, thereby connecting the adjusting plate 113 and the pull rod 121.

[0055] For example, the pull rod 121 and the adjusting plate 113 can also be connected by bolts.

[0056] The pull-out assembly 120 is located on the side of the adjusting plate 113 facing away from the lantern ring 210. The pull drive 122 is connected to the pull rod 121. The pull drive 122 drives the pull rod 121 to move in the direction away from the adjusting plate 113. The adjusting plate 113 moves away from the valve 200, thereby pulling the lantern ring 210 out of the packing gland 201.

[0057] In some examples, the pull rod 121 is arranged parallel to the first connecting rod 111, and the pull rod 121 can be located in the middle position between the first connecting rod 111 and the second connecting rod 112. This allows the pull rod 121 to be coaxially arranged with the lantern ring 210, which helps to keep the forces exerted by the first connecting rod 111 and the second connecting rod 112 on both sides of the lantern ring 210 consistent and reduces the risk of the lantern ring 210 tilting.

[0058] In some examples, the pull drive 122 and the pull rod 121 can be connected by screws, and the pull drive 122 can also be a component such as a cylinder.

[0059] In this embodiment of the application, the removal device 100 connects one end of the first connecting rod 111 and one end of the second connecting rod 112 to the opposite sides of the lantern ring 210. Then, the pulling drive 122 drives the pull rod 121 to move in the direction away from the adjusting plate 113, thereby moving the first connecting rod 111 and the second connecting rod 112 and pulling the lantern ring 210 out of the packing box 201. During this process, the opposite sides of the lantern ring 210 are subjected to the pulling force of the first connecting rod 111 and the second connecting rod 112, reducing the risk of the lantern ring 210 becoming skewed and reducing the risk of damage to the lantern ring 210 and the packing box 201, thus improving the efficiency of the lantern ring 210. 10. Safety of disassembly; Compared with the method of directly pulling the screw to pull out the lantern ring 210, the method of operating the pull drive 122 to pull the pull rod 121 to move in the direction away from the adjusting plate 113 is simpler and less labor-intensive, which helps to reduce the disassembly difficulty and efficiency of the lantern ring 210; The distance between the first connecting rod 111 and the second connecting rod 112 is adjustable, so that the extraction device 100 can meet the disassembly requirements of lantern rings 210 of different diameters, so as to meet the disassembly requirements of different valves 200 and improve the versatility of the extraction device 100; The extraction device 100 of this embodiment can efficiently and safely extract the lantern ring 210, which helps to improve maintenance efficiency and maintenance quality.

[0060] In some embodiments, see Figure 1 As shown, the pull-out assembly 120 also includes a fixing bracket 1221, which is used to connect to the valve 200, and the pull drive 122 is connected to the fixing bracket 1221.

[0061] The fixed frame 1221 can refer to the component used to support the pulling drive component 122; the fixed frame 1221 can serve as the mounting base for the pulling drive component 122, and the fixed frame 1221 can be in the form of a gantry structure, or of course, other structural forms.

[0062] In some examples, the bracket 1221 can be supported on the valve 200 or fixed to the valve 200 by fasteners such as bolts and screws.

[0063] In some examples, the mounting bracket 1221 can be directly screwed to the pull drive 122, and the pull rod 121 can be moved by rotating the pull drive 122, thereby realizing the disassembly of the lantern ring 210.

[0064] In some examples, the pull drive 122 may also be rotatably mounted on the fixed frame 1221. The pull drive 122 rotates relative to the fixed frame 1221, thereby driving the pull rod 121 to move and thus remove the lantern ring 210 from the packing box 201.

[0065] By adopting the technical solution of this embodiment, the fixing bracket 1221 is used to support the pulling drive component 122, making the movement of the pulling drive component 122 more stable and reliable, reducing the shaking during the pulling of the pull rod 121, which helps to reduce damage to the lantern ring 210 and packing gland 201, and improves the quality of maintenance. Compared with directly pulling out the pull using the lead screw, the reaction force of operating the pulling drive component 122 can be transmitted to the valve 200 through the fixing bracket 1221, making the operation of the pulling drive component 122 more labor-saving and efficient.

[0066] In some embodiments, see Figures 3-5 As shown, the pull drive component 122 includes a rotating screw sleeve 1222 and a rotating handle 1223. The rotating screw sleeve 1222 is sleeved on the outside of the pull rod 121 and screwed to the pull rod 121. The rotating screw sleeve 1222 is rotatably connected to the fixed frame 1221 so that the rotating screw sleeve 1222 can rotate around the axis of the pull rod 121. The rotating screw sleeve 1222 is fixedly connected to the rotating handle 1223.

[0067] The rotating threaded sleeve 1222 can refer to the component that is screwed to the pull rod 121. The rotating threaded sleeve 1222 has an internal thread, and the outer wall surface of the pull rod 121 has an external thread. The rotating threaded sleeve 1222 and the pull rod 121 are screwed together by the engagement of the internal and external threads. The rotating threaded sleeve 1222 is rotatably connected to the fixed frame 1221. The rotating threaded sleeve 1222 can be installed on the fixed frame 1221 by free rotation. When the rotating threaded sleeve 1222 rotates, the fixed frame 1221 will not rotate accordingly.

[0068] The rotating handle 1223 can refer to a rotating component connected to the rotating sleeve 1222. The rotating handle 1223 and the rotating sleeve 1222 can be fixedly connected, for example, by screwing, snapping, or bonding. The rotating handle 1223 can be a disc structure; the rotating handle 1223 can also be a rod structure. The rotating handle 1223 is vertically connected to the outer periphery of the rotating sleeve 1222, or it can be other structures.

[0069] By adopting the technical solution of this embodiment, rotating the handle 1223 causes the rotating sleeve 1222 to rotate, which in turn causes the pull rod 121 to move along its own axis, thereby pulling the lantern ring 210 out of the packing gland 201, thus achieving the disassembly of the lantern ring 210. The rotating sleeve 1222 and the pull rod 121 are connected by a thread, making it time-saving and labor-saving to operate the rotating sleeve 1222 and the pulling rod 121. This is also suitable for disassembling the lantern ring 210 under harsh conditions. The threaded connection between the rotating sleeve 1222 and the pull rod 121 allows the pull rod 121 to move stably along its axis, reducing the risk of damage to the lantern ring 210 and the valve body due to the lantern ring 210 being misaligned. Compared to directly pulling out the pull rod using a screw, the reaction force of pulling the pull rod 121 can be transmitted to the valve 200 through the fixing bracket 1221, making the pulling out of the pull rod 121 more labor-saving and efficient. The method of rotating the handle 1223 to drive the rotating screw sleeve 1222 is simple and labor-saving, which helps to improve the removal efficiency of the lantern ring 210.

[0070] In some embodiments, see Figure 6 As shown, the rotating handle 1223 is equipped with an operating lever 12231, which is used by personnel to hold and push the rotating handle 1223 to rotate, making the rotation of the rotating handle 1223 simpler and less strenuous.

[0071] In some embodiments, see Figure 6 As shown, the rotating handle 1223 has a connecting hole 12232, and the rotating screw sleeve 1222 passes through the connecting hole 12232. The connecting hole 12232 is a flat hole, and the cross-section of the part of the rotating screw sleeve 1222 inserted into the connecting hole 12232 is a flat structure. Both the rotating screw and the connecting hole 12232 are flat, so that the rotating handle 1223 will not slip when it drives the rotating screw sleeve 1222 to rotate.

[0072] In some embodiments, see Figure 6 As shown, a fixing nut 12233 is provided on the side of the rotating handle 1223 facing away from the fixed frame 1221. The fixing nut 12233 is screwed to the rotating sleeve 1222. The rotating handle 1223 is clamped between the nut and the fixed frame 1221, thereby realizing the axial positioning of the rotating handle 1223.

[0073] For example, the rotating handle 1223 has a flat hole without threads. The shape of the flat hole matches the rotating sleeve 1222. The upper surface of the rotating handle 1223 fits against the fixing nut 12233. The rotating handle 1223 is then fixed to the rotating sleeve 1222 by the fixing nut 12233. The rotating sleeve 1222 is rotated by rotating the handwheel. The rotating sleeve 1222 moves the pull rod 121 upward through its internal threads, thereby moving the adjusting plate 113 and pulling out the lantern ring 210.

[0074] In some embodiments, see Figure 5 and Figure 6 As shown, the pull drive component 122 includes a limiting sleeve 12222, a fixing frame 1221 with a mounting hole 12214, a pull rod 121 passing through the mounting hole 12214, a rotating screw sleeve 1222 having a flange 12221 at its end facing the adjusting plate 113, the flange 12221 being located inside the mounting hole 12214, the inner wall surface of the mounting hole 12214 having a first stepped surface 12215, the limiting sleeve 12222 being sleeved on the outside of the pull rod 121 and screwed to the mounting hole 12214, the flange 12221 being located between the first stepped surface 12215 and the limiting sleeve 12222; the distance L between the limiting sleeve 12222 and the first stepped surface 12215 is greater than the thickness T of the flange 12221.

[0075] The limiting sleeve 12222 refers to a component used to restrict the rotation of the nut from moving out of the mounting hole 12214. The limiting sleeve 12222 is directly screwed into the mounting hole 12214, and the fixing method of the limiting sleeve 12222 is simple. The mounting hole 12214 is used for the pull rod 121 to pass through and provides installation space for the rotating threaded sleeve 1222 to facilitate the installation of the rotating threaded sleeve 1222. The mounting hole 12214 is a stepped hole, and the plane formed at the change of the diameter of the stepped hole is the first step surface 12215.

[0076] The flange 12221 can refer to an annular protrusion structure at the end of the rotating screw sleeve 1222 facing the adjusting plate 113. This annular protrusion structure extends circumferentially along the rotating screw sleeve 1222. The flange 12221 is located between the limiting sleeve 12222 and the first step surface 12215. The opposite sides of the flange 12221 are respectively limited by the limiting sleeve 12222 and the first step surface 12215, which can realize the axial positioning of the rotating screw sleeve 1222 in the mounting hole 12214 and connect the fixing frame 1221 and the rotating screw sleeve 1222 into a whole, improving the reliability of the device.

[0077] By adopting the technical solution of this embodiment, the distance L between the limiting sleeve 12222 and the first step surface 12215 is greater than the thickness T of the flange 12221, so that there is a gap between the flange 12221 and the limiting sleeve 12222 and / or the first step surface 12215. The flange 12221 does not need to be tightly fitted with the first step surface 12215 and the limiting sleeve 12222 at the same time, which reduces the rotational friction of the rotating screw sleeve 1222, making the rotation of the rotating screw sleeve 1222 smoother and reducing the risk of the rotating screw sleeve 1222 getting stuck. In addition, when the pull rod 121 and the lantern ring 210 are misaligned, this gap allows the flange 12221 to move between the limiting sleeve 12222 and the first step surface 12215 to form an inclination, thereby making the pull rod 121 and the lantern ring 210 aligned, giving the rotating screw sleeve 1222 a certain adjustment space, and improving the robustness and reliability of the entire device.

[0078] In some embodiments, see Figure 6 As shown, the mounting bracket 1221 also includes a mounting sleeve 12211, two support rods 12212 and two crossbars 12213. The mounting sleeve 12211 has a mounting hole 12214 and is connected between the two crossbars 12213. The two support rods 12212 are located on opposite sides of the pull rod 121. One end of the two support rods 12212 is used to support the valve 200, and the other end of the two support rods 12212 is movably connected to the two crossbars 12213 respectively, so that the distance between the two support rods 12212 is adjustable.

[0079] Mounting sleeve 12211 can refer to a component sleeved outside the tie rod 121. The inner hole of mounting sleeve 12211 forms mounting hole 12214, and flange 12221 is located inside mounting sleeve 12211. Support rod 12212 is vertically arranged, and crossbar 12213 is horizontally arranged. Support rod 12212 and crossbar 12213 are vertically connected or nearly vertically connected. One end of support rod 12212 abuts against or is fixed to valve 200, and the other end of support rod 12212 is connected to one end of crossbar 12213. The other end of crossbar 12213 can be fixed to mounting sleeve 12211 by screwing, snapping, or gluing. The two support rods 12212 are symmetrically arranged on opposite sides of mounting sleeve 12211, thus forming a gantry structure. The stability of the entire device fixed to valve 200 is good.

[0080] For example, the mounting sleeve 12211 has flat surfaces on opposite sides and arc surfaces on the other two opposite sides. The mounting sleeve 12211 has internal threads for screwing into the limiting sleeve 12222. The arc surfaces have symmetrical internal threaded holes for screwing into the ends of the two crossbars 12213.

[0081] In some examples, see Figure 6As shown, the lower part of the rotating sleeve 1222 has a step, namely the flange 12221, which mates with the mounting sleeve 12211 and can move around its own axis within the mounting sleeve 12211. The upper part of the rotating sleeve 1222 has an external thread, and the side of the rotating sleeve 1222 is flat. The fixing nut 12233 on the upper part of the rotating sleeve 1222 mates with the rotating sleeve 1222 through a thread, fixing the rotating sleeve 1222 onto the mounting sleeve 12211, so that the rotating sleeve 1222 can rotate circumferentially around its own axis on the mounting sleeve 12211. The interior of the rotating sleeve 1222 has an internal thread, which is screwed into the pull rod 121.

[0082] The support rod 12212 and the crossbar 12213 are connected in a movable manner, so that the distance between the two support rods 12212 is adjustable, thereby meeting the disassembly requirements of the lantern ring 210 of valves 200 of different sizes.

[0083] In some examples, the end of the support rod 12212 is sleeved on the crossbar 12213, and the support rod 12212 can move along the axial direction of the crossbar 12213, thereby realizing the distance adjustment between the two support rods 12212.

[0084] In some examples, the end of the support rod 12212 has a threaded hole, and the fastening bolt 12217 abuts against the outer peripheral surface of the crossbar 12213 through the threaded hole to fix the crossbar 12213 and the support rod 12212, thereby improving the overall stability of the extraction device 100.

[0085] In some examples, the crossbar 12213 is screwed to the side of the mounting sleeve 12211, so that the crossbar 12213 can be stably embedded in the mounting sleeve 12211, achieving a tight connection between the two, reducing unnecessary shaking or displacement, improving the efficient transmission of reaction force, and improving the safety and effectiveness of removing the lantern ring 210.

[0086] In some examples, the support rod 12212 adopts a stable cuboid structure and is designed as an extended structure to adapt to valves 200 of different sizes on site, so as to adapt to different working conditions and facilitate operation.

[0087] In some examples, the crossbar 12213 can be an extended structure to adapt to different space usage conditions on site, improve the efficiency of on-site maintenance, and adapt to different working conditions.

[0088] For example, the support rod 12212 is rectangular with a side length of 100mm. This size satisfies the spatial coordination requirements of the device support while ensuring the compactness and stability of the overall structure. A threaded hole is located at the top of the support rod 12212, and a hole on its side is used to connect it to the crossbar 12213. An internal hex bolt (i.e., fastening bolt 12217) is connected to the threaded hole for a secure connection between the crossbar 12213 and the support rod 12212. A threaded hole is located at the bottom of the support rod 12212, allowing the connection of an extension rod to accommodate the removal space of the lantern ring 210 of valves 200 of different sizes. The crossbar 12213 passes through the side hole of the support rod 12212, and the support rod 12212 can move left and right on the crossbar 12213 to adjust the appropriate support position before being fixed with the internal hex bolt.

[0089] For example, the crossbar 12213 is in the shape of a long cylinder and is 100mm long. One end of the crossbar 12213 is provided with an external thread, which is screwed into the mounting sleeve 12211. The other end of the crossbar 12213 is also provided with an external thread, which is engaged with the internal thread of the extension rod to adapt to the removal of the lantern ring 210 of the large valve 200.

[0090] By adopting the technical solution of this embodiment, the distance between the two support rods 12212 is adjustable, thereby meeting the disassembly requirements of the lantern ring 210 of valves 200 of different sizes; the fixing frame 1221 adopts the structure of support rod 12212, crossbar 12213 and mounting sleeve 12211, which has good structural reliability, which is conducive to improving the reliability of the device and is easy to assemble.

[0091] In some embodiments, see Figures 7-10 As shown, the fixing bracket 1221 is provided with a rotating screw hole 12216, and the pulling drive 122 is screwed into the rotating screw hole 12216.

[0092] The fixing bracket 1221 is provided with a through hole, and the inner wall surface of the through hole is provided with an internal thread. The through hole forms a rotating screw hole 12216. The pulling drive member 122 engages with the rotating screw hole 12216, thereby realizing the screw connection between the fixing bracket 1221 and the rotating screw hole 12216. Under the engagement of the threads, the pulling drive member 122 is rotated, and the pulling drive member 122 is moved along the axial direction of the rotating screw hole 12216, thereby pulling the pull rod 121 to move, and then taking the lantern ring 210 out of the packing box 201.

[0093] By adopting the technical solution of this embodiment, the pull drive 122 and the fixed frame 1221 are connected by a threaded engagement. By rotating the pull drive 122, the lantern ring 210 can be disassembled. The disassembly operation is simple and saves time and effort. In addition, by using the threaded engagement, the lantern ring 210 under harsh conditions can also be easily removed from the packing box 201.

[0094] In some embodiments, see Figure 9 and Figure 10 As shown, the pull drive component 122 includes a rotating sleeve 1224 and a movable sleeve 1225. The pull rod 121 is sleeved outside the valve stem 230 of the valve 200, and the rotating sleeve 1224 is sleeved outside the valve stem 230 of the valve 200. The pull rod 121 is connected to the rotating sleeve 1224 and is located between the rotating sleeve 1224 and the adjusting plate 113. The movable sleeve 1225 is sleeved outside the rotating sleeve 1224 and can rotate relative to the movable sleeve 1225. The movable sleeve 1225 is screwed into the rotating screw hole 12216 to push the rotating sleeve 1224 to move in the direction away from the adjusting plate 113.

[0095] The movable sleeve 1225 can refer to the component that pushes the rotating sleeve 1224 to move. The movable sleeve 1225 is sleeved outside the rotating sleeve 1224. The outer wall surface of the movable sleeve 1225 has an external thread, which meshes with the internal thread of the rotating screw hole 12216. Through the mutual meshing of the internal and external threads, the fixed frame 1221 and the movable sleeve 1225 are screwed together. Under the meshing action of the internal and external threads, the movable sleeve 1225 rotates and can move relative to the fixed frame 1221 along the axial direction of the valve stem 230, thereby pulling the movable sleeve 1225 to move in the direction away from the adjusting plate 113. The rotating sleeve 1224 drives the pull rod 121 to move, thereby pushing the adjusting plate 113 to move away from the packing box 201, thereby removing the lantern ring 210 from the packing box 201.

[0096] The rotating sleeve 1224 can refer to the component located inside the movable sleeve 1225 and connected to the pull rod 121, with the movable sleeve 1225 fitted over the rotating sleeve 1224. The pull rod 121 and the rotating sleeve 1224 can be integrally formed or formed separately and then connected together.

[0097] For example, the movable sleeve 1225, the rotating sleeve 1224, the pull rod 121, and the movable sleeve 1225 are all hollow circular sleeves. The pull rod 121 and the movable sleeve 1225 are sleeved outside the valve stem 230, and the movable sleeve 1225 is sleeved outside the rotating sleeve 1224. One end of the rotating sleeve 1224 is connected to the pull rod 121. The rotating sleeve 1224 and the pull rod 121 are coaxially arranged. The rotating sleeve 1224 and the pull rod 121 are both clearance-fitted with the valve stem 230. The rotating sleeve 1224 rotates relative to the valve stem 230, thereby driving the pull rod 121, the first connecting rod 111, and the second connecting rod 112 to rotate, so that the first connecting rod 111 and the second connecting rod 112 can be aligned with the drainage holes 212 on opposite sides of the lantern ring 210, thereby facilitating subsequent screwing. There are multiple first connecting rods 111 and multiple second connecting rods 112. The multiple first connecting rods 111 and multiple second connecting rods 112 are distributed at intervals along the circumference of the pull rod 121. The arrangement of multiple first connecting rods 111 and multiple second connecting rods 112 allows the lantern ring 210 and the extraction device 100 to form multiple connection points, which helps to improve the stability and reliability of the extraction of the lantern ring 210.

[0098] By adopting the technical solution of this embodiment, the movable sleeve 1225 and the fixed frame 1221 are connected by a threaded connection, which has a simple connection structure and makes the movement of the movable sleeve 1225 simpler; in addition, the rotating sleeve 1224 can drive the pull rod 121 to rotate, thereby facilitating the connection between the first connecting rod 111 and the second connecting rod 112 and the lantern ring 210.

[0099] In some embodiments, the rotating sleeve 1224 is provided with two rotating handles 12241. One end of the two rotating handles 12241 is respectively installed on opposite sides of the rotating sleeve 1224. The two rotating handles 12241 are arranged perpendicular to the axis of the rotating sleeve 1224. When a person holds the two rotating handles 12241, the rotating sleeve 1224 is rotated, making the rotation operation of the rotating sleeve 1224 more time-saving and labor-saving.

[0100] In some embodiments, the movable sleeve 1225 is provided with two force-applying handles 12251. One end of the two force-applying handles 12251 is respectively installed on opposite sides of the movable sleeve 1225. The two force-applying handles 12251 are arranged perpendicular to the axis of the movable sleeve 1225. When a person holds the two force-applying handles 12251, the movable sleeve 1225 is rotated, making the rotation operation of the movable sleeve 1225 more time-saving and labor-saving.

[0101] In some embodiments, the removal device 100 further includes a blocking nut 12242, which is sleeved on the outside of the rotating sleeve 1224 and screwed to the rotating sleeve 1224. The blocking nut 12242 is located at the end of the movable sleeve 1225 facing away from the adjusting plate 113 and is used to abut against the movable sleeve 1225.

[0102] The blocking nut 12242 is used to be screwed onto the outside of the movable sleeve 1225, and the internal thread of the blocking nut 12242 engages with the external thread of the movable sleeve 1225.

[0103] By adopting the technical solution of this embodiment, during the process of the movable sleeve 1225 moving away from the packing box 201, the movable sleeve 1225 abuts against the blocking nut 12242, so that the movement of the movable sleeve 1225 can drive the rotating sleeve 1224 and the adjusting plate 113 to move away from the packing box 201, thereby pulling the lantern ring 210 out of the packing box 201 and realizing the removal of the lantern ring 210.

[0104] In some embodiments, a first rolling bearing plate 12243 is provided between the blocking nut 12242 and the movable sleeve 1225.

[0105] The first rolling bearing plate 12243 can refer to the rolling bearing plate located between the blocking nut 12242 and the movable sleeve 1225.

[0106] In some examples, the rolling bearing plates are made of high-precision bearing steel with a hardened surface treatment, resulting in high hardness and good wear resistance. The balls in the rolling bearing plates are closely and evenly arranged, which effectively reduces the rotational friction between the blocking nut 12242 and the moving sleeve 1225.

[0107] By adopting the technical solution of this embodiment, a first rolling bearing plate 12243 is provided between the blocking nut 12242 and the moving sleeve 1225. The first rolling bearing plate 12243 can effectively reduce the rotational friction between the blocking nut 12242 and the moving sleeve 1225, making the moving sleeve 1225 rotate more smoothly, the operation more labor-saving, and improving the working efficiency of the entire extraction device 100.

[0108] In some embodiments, the outer peripheral surface of the rotating sleeve 1224 has a second stepped surface 12244, which is used to abut against the end of the movable sleeve 1225 near the adjusting plate 113.

[0109] The rotating sleeve 1224 is a stepped bushing, and the plane formed at the diameter change of the stepped bushing is the second step surface 12244.

[0110] For example, one end of the rotating sleeve 1224 has a large diameter and the other end has a small diameter. The movable sleeve 1225 is fitted onto the smaller diameter end of the rotating sleeve 1224 and abuts against the second step surface 12244.

[0111] By adopting the technical solution of this embodiment, the cooperation between the second step surface 12244 and the blocking nut 12242 can realize the axial positioning of the moving sleeve 1225, which is beneficial to improving the reliability of the take-out device 100.

[0112] In some embodiments, a second rolling bearing plate 12245 is provided between the end face of the second stepped surface 12244 and the movable sleeve 1225.

[0113] The second rolling bearing plate 12245 can refer to the rolling bearing plate disposed between the second step surface 12244 and the movable sleeve 1225.

[0114] By adopting the technical solution of this embodiment, a second rolling bearing plate 12245 is provided between the second step surface 12244 and the moving sleeve 1225. The second rolling bearing plate 12245 can effectively reduce the rotational friction between the second step surface 12244 and the moving sleeve 1225, making the moving sleeve 1225 rotate more smoothly, the operation more labor-saving, and improving the working efficiency of the entire extraction device 100.

[0115] In some cases, due to the small space of the packing gland 201 of valve 200, the valve stem 230 or packing gland 201 may be damaged during the removal of lantern ring 210, causing secondary damage to valve 200 and reducing the service life of valve 200.

[0116] In some embodiments, the removal device 100 further includes a first guide sleeve 1226, which is sleeved outside the valve stem 230 of the valve 200 and located inside the rotating sleeve 1224, and / or, the removal device 100 further includes a second guide sleeve 1227, which is sleeved outside the valve stem 230 of the valve 200 and located inside the pull rod 121.

[0117] The first guide sleeve 1226 is fitted over the valve stem 230, and the rotating sleeve 1224 is fitted over the first guide sleeve 1226. The first guide sleeve 1226 and the valve stem 230 can be fitted with a clearance or a tight fit; the rotating sleeve 1224 and the first guide sleeve 1226 can also be fitted with a clearance or a tight fit. The first guide sleeve 1226 can separate the rotating sleeve 1224 and the valve stem 230, reducing the risk of damage to the valve stem 230. In addition, the first guide sleeve 1226 can also guide the rotating sleeve 1224, thereby guiding the pull-out assembly 120 to move along a preset path, reducing the risk of damage to the packing gland 201, reducing the risk of damage to the valve 200, and improving the service life of the valve 200.

[0118] The second guide sleeve 1227 is fitted over the valve stem 230, and the pull rod 121 is fitted over the second guide sleeve 1227. The second guide sleeve 1227 and the valve stem 230 can be fitted with a clearance or a tight fit; the pull rod 121 and the second guide sleeve 1227 can also be fitted with a clearance or a tight fit. The second guide sleeve 1227 can separate the pull rod 121 and the valve stem 230, reducing the risk of damage to the valve stem 230. In addition, the second guide sleeve 1227 can also guide the pull rod 121, thereby guiding the pull-out assembly 120 to move along a preset path, reducing the risk of damage to the packing gland 201, reducing the risk of damage to the valve 200, and improving the service life of the valve 200.

[0119] During use, the first guide sleeve 1226 and the second guide sleeve 1227 of different sizes can be replaced according to the valve 200 of different sizes to meet the requirements for removing the lantern ring 210 of the valve 200 of different sizes.

[0120] In some examples, the first guide sleeve 1226 and the second guide sleeve 1227 are made of polytetrafluoroethylene (PTFE), which has an extremely low coefficient of friction, good chemical stability, and corrosion resistance. The first guide sleeve 1226 and the second guide sleeve 1227 are respectively installed in the stepped holes of the rotating sleeve 1224 and the pull rod 121. The first guide sleeve 1226 and the second guide sleeve 1227 can tightly wrap the valve stem 230. During the removal of the lantern ring 210, they can not only play a guiding role, but also effectively isolate the rotating sleeve 1224 from the valve stem 230 and the pull rod 121 from the valve stem 230, reducing any scratches or wear on the valve stem 230 and the packing gland 201, which helps to extend the service life of the valve 200.

[0121] In some embodiments, the fixing frame 1221 includes a fixing sleeve 12218 and a plurality of connecting parts 12219. The fixing sleeve 12218 is sleeved on the outside of the movable sleeve 1225. The plurality of connecting parts 12219 are connected to the fixing sleeve 12218 and are distributed at intervals along the circumference of the fixing sleeve 12218. The connecting parts 12219 are provided with adjustment holes 12220 extending radially along the fixing sleeve 12218. The adjustment holes 12220 are connected to the yoke 220 of the valve 200 by fasteners.

[0122] The inner hole of the fixed sleeve 12218 forms a rotating screw hole 12216. The movable sleeve 1225 is screwed into the fixed sleeve 12218. The connecting part 12219 has an elongated structure and extends radially along the fixed sleeve 12218. There are multiple connecting parts 12219, which are distributed circumferentially along the fixed sleeve 12218. The connecting part 12219 is provided with an adjustment hole 12220. The adjustment hole 12220 is an elongated hole that extends radially along the fixed sleeve 12218. In this way, fasteners such as bolts and screws can move along the extension direction of the adjustment hole 12220 to connect with the yoke 220 of valves 200 of different sizes. This allows the removal device 100 to be fixed on valves 200 of different sizes, meeting the removal requirements of the lantern ring 210 of valves 200 of different sizes.

[0123] In some examples, the mounting bracket 1221 is made of high-quality carbon steel and galvanized to enhance its corrosion resistance. The four connecting parts 12219 resemble a cross structure, with four elongated holes offering high positional accuracy. When connected to the yoke 220 of the valve 200 via bolts, this ensures a secure and stable installation. The rotating screw hole 12216 within the mounting sleeve 12218 has a high degree of thread matching with the moving sleeve 1225, guaranteeing effective force transmission. The high precision machining of the internal thread of the mounting sleeve 12218 ensures a stable fit with the moving sleeve 1225, providing precise guidance for the rotating sleeve 1224 and stably applying the reaction force generated during operation to the valve 200.

[0124] In some embodiments, see Figure 11 As shown, the pull drive component 122 includes a blocking component 1228 and a hammer 1229. The hammer 1229 is movably sleeved outside the pull rod 121. The blocking component 1228 is connected to one end of the pull rod 121 facing away from the adjusting plate 113. The hammer 1229 is located between the adjusting plate 113 and the blocking component 1228.

[0125] A blocking element 1228 is installed at one end of the pull rod 121 facing away from the adjusting plate 113. The blocking element 1228 is used to prevent the hammer 1229 from disengaging from the pull rod 121. For example, the blocking element 1228 is a nut, which is screwed onto the pull rod 121. The hammer 1229 is sleeved on the outside of the pull rod 121, and the hammer 1229 and the pull rod 121 are clearance-fitted. The inner diameter of the hammer 1229 is smaller than the outer diameter of the nut, so that the hammer 1229 cannot be disengaged from the pull rod 121.

[0126] The hammer 1229 can refer to a component with a certain inertia. When in use, a force is applied to the hammer 1229 toward the blocking member 1228, causing the hammer 1229 to move toward the blocking member 1228 and strike the blocking member 1228. This applies a force to the blocking member 1228 in the direction away from the adjusting plate 113, thereby pulling the lever 121 in the direction away from the adjusting plate 113, and thus pulling the lantern ring 210 out of the packing box 201.

[0127] In some examples, the hammer 1229 is a cylindrical knurled cylinder with a hollow interior. The hammer 1229 moves along the axial direction of the pull rod 121. The knurling on the middle of the outer surface of the hammer 1229 is used to increase the grip friction. The hammer 1229 has heavier masses at both ends to increase the inertia of movement, making it easier to apply a pulling force to the lantern.

[0128] By adopting the technical solution of this embodiment, the operation of pulling out the lantern ring 210 by striking the blocking member 1228 with the hammer 1229 is simple and helps to reduce the difficulty of removing the lantern ring 210.

[0129] In some embodiments, the adjusting plate 113 is provided with a first adjusting hole 1131 and a second adjusting hole 1132. The first adjusting hole 1131 and the second adjusting hole 1132 extend radially along the pull rod 121. The first connecting rod 111 passes through the first adjusting hole 1131 and can move along the extending direction of the first adjusting hole 1131. The second connecting rod 112 passes through the second adjusting hole 1132 and can move along the extending direction of the second adjusting hole 1132.

[0130] The first adjustment hole 1131 and the second adjustment hole 1132 are elongated strips. The first adjustment hole 1131 and the second adjustment hole 1132 extend radially along the pull rod 121. The first connecting rod 111 passes through the first adjustment hole 1131 and can move within the first adjustment hole 1131. The second connecting rod 112 passes through the second adjustment hole 1132 and can move within the second adjustment hole 1132, thereby realizing the distance adjustment between the first connecting rod 111 and the second connecting rod 112 to meet the disassembly requirements of lantern rings 210 of different sizes.

[0131] In some examples, see Figure 1As shown, the first connecting rod 111 and the second connecting rod 112 are screw rods. The first connecting rod 111 passes through the first adjusting hole 1131 and is screwed to the first locking nut 114. The first locking nut 114 is located on the side of the adjusting plate 113 facing the pull-out assembly 120. The second connecting rod 112 passes through the second adjusting hole 1132 and is screwed to the second locking nut 115. The second locking nut 115 is located on the side of the adjusting plate 113 facing the pull-out assembly 120. Through the blocking effect of the first locking nut 114 and the second locking nut 115, the first connecting rod 111 and the second connecting rod 112 will not come out of the first adjusting hole 1131 and the second adjusting hole 1132 during the pull-out process of the lantern ring 210.

[0132] For example, see Figure 1 As shown, the lower ends of the first connecting rod 111 and the second connecting rod 112 are screwed to the two drainage holes 212 on the lantern ring 210. The upper ends of the first connecting rod 111 and the second connecting rod 112 are respectively inserted into the first adjusting hole 1131 and the second adjusting hole 1132 of the adjusting plate 113, and then fixed by the first locking nut 114 and the second locking nut 115 respectively. The first connecting rod 111 and the second connecting rod 112 can move left and right in the first adjusting hole 1131 and the second adjusting hole 1132 respectively to accommodate the removal of the lantern ring 210 of different sized valves 200.

[0133] In some examples, see Figure 11 As shown, there are two first locking nuts 114, which are located on opposite sides of the adjusting plate 113 to lock the first connecting rod 111 to the adjusting plate 113; there are two second locking nuts 115, which are located on opposite sides of the adjusting plate 113 to lock the second connecting rod 112 to the adjusting plate 113.

[0134] In some examples, the adjusting plate 113 is integrally formed with the pull rod 121, or it can be formed separately and then assembled together with fasteners such as nuts.

[0135] For example, see Figure 3 and Figure 6 As shown, the lower end of the pull rod 121 passes through the adjusting plate 113 and is fixed by the connecting nut 1211. When the pull rod 121 moves upward, it drives the wire adjusting plate 113 to move upward, thereby driving the first connecting rod 111 and the second connecting rod 112 to move upward, thus pulling out the lantern ring 210. The pull rod 121 and the adjusting plate 113 are fixedly connected by the connecting nut 1211 below, ensuring the upward vertical pulling force of the pull rod 121 and the space for retraction, avoiding damage to the device or the lantern ring 210.

[0136] The removal device 100 of this application embodiment can have a pull-out component 120 with various structures. It can use a movable hammer 1229 to generate an upward pulling force by utilizing its motion inertia. The operation is simple and more efficient than traditional prying and pulling methods. It can quickly remove the lantern ring 210 and shorten maintenance time. When it is difficult to remove, the pull-out component 120 can use a rotating screw sleeve 1222 or a moving sleeve 1225 and a stretching structure to pull out the lantern ring 210.

[0137] Compared to the lead screw pulling and reverse knocking methods, the extraction device 100 of this application embodiment offers significantly improved operational convenience. It eliminates the need for cumbersome and complex procedures and various tools, and its unique design makes the operation steps simpler and more efficient. In terms of applicability, it breaks through the limitations on valve type, size, and operating conditions, flexibly handling the extraction of lantern rings 210 from various specifications and types of nuclear-grade valves 200. Reliability is also enhanced; compared to the reverse knocking extraction method, it reduces the risk of damage to the packing gland 201 and lantern ring 210. Regarding personnel safety, by shortening operation time and optimizing protective design, it greatly reduces the radiation dose to personnel. These advantages bring excellent results, not only improving extraction efficiency and reducing maintenance time, but also reducing the risk of equipment damage and extending equipment lifespan. More importantly, it significantly improves overall safety, effectively reducing the probability of safety accidents and laying a solid foundation for the stable operation of nuclear power plants. It fundamentally ensures the long-term stable operation of valves 200, which is of great significance for improving the safety, reliability, and economy of industrial production systems.

[0138] The removal device 100 of this application embodiment solves the problem of removing the lantern ring 210 during the maintenance of nuclear power plant valves 200, creating multiple benefits for the power plant. By optimizing the removal method, damage to the lantern ring 210 is avoided, extending its service life and reducing equipment replacement costs; improved force transmission and operation methods increase removal efficiency, shorten maintenance time, and reduce power generation losses due to downtime, indirectly improving the power plant's economic benefits; it protects the packing gland 201, reducing maintenance costs; the adaptive adjustment mechanism adapts to various valve specifications 200, reducing tool procurement expenditures; the flexible structural design overcomes space limitations, ensuring smooth removal work; and diverse power acquisition methods ensure removal reliability, reducing the failure rate, comprehensively reducing costs and increasing efficiency for the power plant, and improving overall operational efficiency.

[0139] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A removal device suitable for removing the lantern ring of a valve, characterized in that, The extraction device includes: The adjustment assembly includes a first connecting rod, a second connecting rod, and an adjustment plate; one end of the first connecting rod and one end of the second connecting rod are used to connect to opposite sides of the lantern ring; at least one of the other ends of the first connecting rod and the second connecting rod is movably connected to the adjustment plate so that the distance between the first connecting rod and the second connecting rod is adjustable. The pull-out assembly includes a pull rod and a pull drive component. The pull drive component is located on the side of the adjustment plate opposite to the lantern ring. One end of the pull rod is connected to the adjustment plate, and the pull drive component is connected to the other end of the pull rod. The pull drive component is used to drive the pull rod to move in a direction opposite to the adjustment plate.

2. The extraction device according to claim 1, characterized in that: The pull-out assembly also includes a fixing bracket for connecting to the valve, and the pull drive is connected to the fixing bracket.

3. The extraction device according to claim 2, characterized in that: The pulling drive component includes a rotating sleeve and a rotating handle. The rotating sleeve is sleeved on the outside of the pull rod and screwed to the pull rod. The rotating sleeve is rotatably connected to the fixed frame so that the rotating sleeve can rotate around the axis of the pull rod. The rotating sleeve is fixedly connected to the rotating handle.

4. The extraction device according to claim 3, characterized in that: The pulling drive component includes a limiting sleeve, the fixing frame has a mounting hole, the pull rod passes through the mounting hole, the end of the rotating screw sleeve facing the adjusting plate has a flange, the flange is located inside the mounting hole, the inner wall surface of the mounting hole has a first stepped surface, the limiting sleeve is sleeved on the pull rod and screwed to the mounting hole, the flange is located between the first stepped surface and the limiting sleeve; the distance between the limiting sleeve and the first stepped surface is greater than the thickness of the flange.

5. The extraction device according to claim 4, characterized in that: The mounting bracket further includes a mounting sleeve, two support rods, and two crossbars. The mounting sleeve has the mounting hole and is connected between the two crossbars. The two support rods are located on opposite sides of the pull rod. One end of each support rod is used to support the valve, and the other end of each support rod is movably connected to the two crossbars, so that the distance between the two support rods is adjustable.

6. The extraction device according to claim 2, characterized in that: The fixed frame is provided with a rotating screw hole, and the pulling drive component is screwed into the rotating screw hole.

7. The extraction device according to claim 6, characterized in that: The pull drive component includes a rotating sleeve and a movable sleeve. The pull rod is sleeved outside the valve stem of the valve, and the rotating sleeve is sleeved outside the valve stem of the valve. The pull rod is connected to the rotating sleeve and located between the rotating sleeve and the adjusting plate. The movable sleeve is sleeved outside the rotating sleeve and can rotate relative to the movable sleeve. The movable sleeve is screwed into the rotating screw hole to push the rotating sleeve to move in a direction away from the adjusting plate.

8. The extraction device according to claim 7, characterized in that: The extraction device further includes a first guide sleeve, which is sleeved outside the valve stem and located inside the rotating sleeve, and / or, The extraction device further includes a second guide sleeve, which is sleeved outside the valve stem and located inside the pull rod.

9. The extraction device according to claim 1, characterized in that: The pulling drive component includes a blocking component and a hammer. The hammer is sleeved on the outside of the pull rod. The blocking component is connected to the end of the pull rod facing away from the adjusting plate. The hammer is located between the adjusting plate and the blocking component. The hammer is used to strike the blocking component along the axial direction of the pull rod to drive the pull rod to move away from the adjusting plate.

10. The extraction device according to any one of claims 1 to 9, characterized in that: The adjusting plate is provided with a first adjusting hole and a second adjusting hole, the first adjusting hole and the second adjusting hole extend radially along the pull rod, the first connecting rod passes through the first adjusting hole and can move along the extending direction of the first adjusting hole, and the second connecting rod passes through the second adjusting hole and can move along the extending direction of the second adjusting hole.

Images