Valve packing extractor

Abstract

The application relates to a valve packing taking-out device which comprises a positioning mechanism, two supporting mechanisms and an inserting and taking-out piece. The positioning mechanism comprises two positioning pieces which are oppositely arranged and detachably connected, and a containing space for containing a valve rod is formed between the two positioning pieces. Each of the two supporting mechanisms comprises a supporting column, an adjusting piece and a clamping piece. The supporting column can abut against the top and bottom of a mounting chamber to realize the positioning of the supporting column. The adjusting piece can be adjustably installed on the supporting column in the height direction. The clamping piece is rotatably connected to the adjusting piece. The two clamping pieces can be clamped with the two positioning pieces respectively, the position of the positioning piece in the height direction can be fixed, the inserting and taking-out piece is adjustably installed on the positioning piece in the height direction and can be inserted into the packing, then the position of the adjusting piece on the supporting column is adjusted, the packing can be taken out, the packing can be taken out without disassembling the valve, the packing chamber and the valve rod can be prevented from being damaged, and the replacement efficiency can be improved.

Description

Technical Field

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

[0002] Packing, also known as sealing packing, is typically made of woven, soft, thread-like material. It consists of square, rectangular, or circular strips that fill a sealing cavity and is widely used in nuclear-grade valves. The main function of valve packing is to prevent the internal medium from leaking out from the valve stem, ensuring a seal between the valve stem and the valve cover, and guaranteeing that the normal function of the valve is not affected.

[0003] Because packing requires a certain amount of clamping force during installation to balance the system pressure inside the valve cavity when the valve is online, the packing is often tightly pressed into the packing cavity. However, during valve disassembly, the packing needs to be replaced as a whole. Due to the severe compression and embedding of the packing within the packing cavity, disassembly is extremely difficult. Furthermore, the valve stem and the inner wall of the packing cavity form a sealing surface, requiring care not to damage these surfaces during packing removal. Therefore, on-site packing disassembly is challenging and high-risk.

[0004] In related technologies, packing removal tools often employ packing hooks. These tools can easily damage the packing chamber and valve stem, leading to leaks at the packing seal. This is especially problematic for PTFE packing, where valve disassembly is often necessary to remove and replace the packing. After valve disassembly, if scratches or pits appear in the packing chamber, repair welding and grinding are required. Using packing hooks not only risks damaging the packing chamber and valve stem but also increases workload and reduces replacement efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a valve packing removal device that can remove the packing without disassembling the valve, avoid damage to the packing chamber and valve stem, and improve replacement efficiency and reduce workload.

[0006] A valve packing removal device is provided for use with a valve, the valve including a mounting chamber, packing, and a valve stem, wherein the bottom of the mounting chamber has a placement groove for placing the packing; the valve stem passes through the mounting chamber and the packing, and the valve packing removal device includes:

[0007] The positioning mechanism includes two opposing positioning members, which are detachably connected, and a receiving space for accommodating the valve stem is formed between the two positioning members.

[0008] Two support mechanisms are provided, each including a support column, an adjusting member, and a locking member. The support column can abut against the top and bottom of the mounting chamber. The adjusting member can be adjusted in position along the height direction and is mounted on the support column. The locking member is rotatably connected to the adjusting member. The two locking members can respectively lock into the two positioning members.

[0009] An inserter is mounted to the positioning member in an adjustable position along the height direction and is capable of being inserted into the packing.

[0010] In one embodiment, the height of the support column is adjustable.

[0011] In one embodiment, the adjusting member is sleeved on the supporting column, and the supporting column is provided with a first thread, and the adjusting member is provided with a second thread that matches the first thread;

[0012] And / or, the support mechanism further includes an operating element connected to the adjusting element, which can drive the adjusting element to move along the height direction by driving the operating element.

[0013] In one embodiment, the operating member is sleeved on the adjusting member, and the operating member is provided with a first tooth, while the adjusting member is provided with a second tooth that meshes with the first tooth.

[0014] In one embodiment, a limiting groove is provided on the outer side wall of the adjusting member, and the snap-fit ​​member is sleeved in the limiting groove and rotatably connected to the limiting groove.

[0015] In one embodiment, the positioning member includes a snap-fit ​​portion and two enclosure portions. The snap-fit ​​portion is capable of snapping with the snap-fit ​​member, and the two enclosure portions are spaced apart at the end of the snap-fit ​​portion away from the snap-fit ​​member, and extend obliquely toward the side away from the snap-fit ​​member.

[0016] In one embodiment, the enclosure portion is provided with a plurality of positioning holes, which are spaced apart along the extending direction of the enclosure portion; the insert is threadedly connected to the positioning holes.

[0017] In one embodiment, the positioning member further includes two connecting portions, which are respectively connected to one end of the two enclosure portions away from the snap-fit ​​portion, and the connecting portions extend in a direction away from the receiving space; the two connecting portions of the positioning member are detachably connected by a mating structure.

[0018] In one embodiment, the mating structure includes a connecting rod, two locking nuts, and a connecting hole on the connecting part. The connecting rod includes a rotating part and a locking part. The rotating part is rotatably connected to one of the two connecting holes, and the locking part passes through the other of the two connecting holes. Both locking nuts are threadedly connected to the locking part and are respectively disposed on both sides of the connecting hole on the locking part.

[0019] In one embodiment, the inner wall of the enclosure is provided with anti-scratch plates;

[0020] And / or, the insert has a helical self-tapping head capable of being inserted into the packing.

[0021] In the above scheme, by setting up a support mechanism and a positioning mechanism, the support column can abut against the top and bottom of the installation chamber to achieve the positioning of the support column. By adjusting the position of the adjusting member on the support column, the snap-fit ​​member is moved along the height direction Z to the position corresponding to the positioning member. By rotating the snap-fit ​​member, the snap-fit ​​member is snapped into the positioning member, thereby fixing the position of the positioning member in the height direction Z. By adjusting the position of the insert member along the height direction Z on the positioning member, the insert member can be inserted into the packing by adjusting the position of the insert member in the height direction Z, thereby fixing it to the packing. After fixing it to the packing, by adjusting the position of the adjusting member on the support column, the snap-fit ​​member, the positioning member and the insert member move synchronously to remove the packing. In this application, the packing can be removed without disassembling the valve, and damage to the packing chamber and valve stem can be avoided, which can improve the replacement efficiency and reduce the workload. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the valve structure according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the connection structure of packing, valve stem, and valve packing removal device according to an embodiment of this application.

[0026] Figure 3This is a schematic diagram of the support mechanism shown in one embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the connection structure of the adjusting member, the snap-fit ​​member, and the operating member according to an embodiment of this application.

[0028] Figure 5 This is a schematic diagram of the connection structure of the positioning mechanism and the mating structure shown in one embodiment of this application.

[0029] Figure 6 This is a schematic diagram of the insert component shown in one embodiment of this application.

[0030] Explanation of reference numerals in the attached figures

[0031] 100. Valve; 110. Mounting chamber; 111. Communicating groove; 120. Packing; 130. Valve stem; 140. Valve yoke; 141. Sleeve; 142. Base; 143. Yoke cover;

[0032] 10. Valve packing removal device; 200. Positioning mechanism; 210. Positioning component; 211. Snap-fit ​​part; 212. Enclosing part; 213. Connecting part; 214. Positioning hole; 220. Anti-scratch plate; 300. Support mechanism; 310. Support column; 311. Outer tube; 312. Inner tube; 313. Adjusting part; 314. First thread; 320. Adjusting component; 321. Limiting groove; 322. Second tooth; 330. Snap-fit ​​part; 331. Rotating hole; 332. Snap groove; 340. Operating component; 400. Insertion component; 410. Spiral self-tapping head; 420. Threaded part; 430. Extension part; 440. Fixing part; 500. Mating structure; 510. Connecting rod; 511. Rotating part; 512. Threaded part; 520. Locking nut. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0035] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "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 mechanical connection or an electrical connection; 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 based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] Please see Figure 1 and Figure 2 This application relates to a valve packing removal device 10 for use with a valve 100. The valve 100 includes a mounting chamber 110, packing 120, and a valve stem 130. The bottom of the mounting chamber 110 has a placement groove for placing the packing 120. The valve stem 130 passes through the mounting chamber 110 and the packing 120. Specifically, the inner diameter of the placement groove is smaller than the inner diameter of the mounting chamber 110. A communicating groove 111 connecting to the outside is provided on the side wall of the mounting chamber 110.

[0040] Valve 100 also includes a valve yoke, which includes a sleeve 141, a base 142, and a yoke cover 143. The sleeve 141 is disposed on the base 142, and the yoke cover 143 is disposed at the end of the sleeve 141 away from the base 142. The sleeve 141 and the yoke cover 143 together form an installation chamber 110. A placement groove is disposed at the bottom of the sleeve 141.

[0041] Please see Figure 1 and Figure 2 The valve packing removal device 10 includes a positioning mechanism 200, two support mechanisms 300 and an insert 400. The positioning mechanism 200 is snapped into connection with the two support mechanisms 300, and the insert 400 is disposed on the positioning mechanism 200.

[0042] Please see Figure 1 , Figure 2 and Figure 5 The positioning mechanism 200 includes two opposing positioning members 210, which are detachably connected, and a receiving space for accommodating the valve stem 130 is formed between the two positioning members 210. Specifically, there is a gap between the two positioning members 210 and the valve stem 130 to prevent scratching the screw.

[0043] Please see Figure 1 , Figure 2 and Figure 3Both support mechanisms 300 include a support column 310, an adjusting member 320, and a locking member 330. The support column 310 can abut against the top and bottom of the mounting chamber 110 to achieve positioning of the support column 310. The adjusting member 320 can be adjusted and mounted on the support column 310 along the height direction Z. In this embodiment, the height direction Z is the height direction of the support column 310. The locking member 330 is rotatably connected to the adjusting member 320. The two locking members 330 can respectively engage with the two positioning members 210.

[0044] When the packing 120 needs to be removed, the support column 310 can be installed in the installation chamber 110 first, and then the two positioning pieces 210 can be installed on the outside of the valve stem 130. By adjusting the position of the adjusting piece 320 on the support column 310, the locking piece 330 is moved along the height direction Z to the position corresponding to the positioning piece 210. By rotating the locking piece 330, the locking piece 330 is engaged with the positioning piece 210, thereby fixing the position of the positioning piece 210 in the height direction Z. It should be understood that the adjustment piece 320 and the locking piece 330 can be adjusted through the connecting groove 111.

[0045] The insert 400 is adjustablely mounted on the positioning member 210 along the height direction Z and can be inserted into the packing 120. After the positioning member 210 is fixed, the insert 400 can be inserted into the packing 120 by adjusting its position in the height direction Z, thereby fixing the packing 120. After being fixed to the packing 120, the position of the adjusting member 320 on the support column 310 is adjusted to drive the locking member 330, the positioning member 210, and the insert 400 to move synchronously, so as to remove the packing 120. It should be noted that after the packing 120 is removed to the set position, the yoke cover 143 can be removed to take the packing 120 out of the valve 100.

[0046] The valve packing removal device 10 of this application is described in detail below with reference to the accompanying drawings.

[0047] Please see Figure 1 , Figure 2 and Figure 3 According to some embodiments of this application, optionally, the height of the support column 310 is adjustable. By adjusting the height of the support column 310, both ends of the support column 310 abut against the top and bottom of the mounting chamber 110, thereby fixing the support column 310 more firmly and allowing for the removal of packing 120 for different types of valves 100, providing versatility in use.

[0048] Specifically, the support column 310 has an outer tube 311 and an inner tube 312. The inner tube 312 is partially sleeved inside the outer tube 311 and is threadedly connected to the outer tube 311. An adjustment part 313 is also provided on the inner tube 312. The height of the support column 310 can be adjusted by rotating the adjustment part 313.

[0049] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the adjusting member 320 is threadedly connected to the support column 310. Specifically, the adjusting member 320 is sleeved on the support column 310, and the support column 310 has a first thread 314, while the adjusting member 320 has a second thread adapted to the first thread 314. When it is necessary to adjust the position of the adjusting member 320 in the height direction Z, it is only necessary to rotate the adjusting member 320.

[0050] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, the support mechanism 300 further includes an operating member 340, which is connected to the adjusting member 320. By driving the operating member 340, the adjusting member 320 can be moved along the height direction. Specifically, the operating member 340 is sleeved on the adjusting member 320, and the operating member 340 is provided with a first tooth, while the adjusting member 320 is provided with a second tooth 322 that meshes with the first tooth.

[0051] More specifically, the first tooth is disposed on the inner side wall of the operating member 340. The second tooth 322 is disposed on the outer side wall of the adjusting member 320. By rotating the operating member 340, the adjusting member 320 can be moved in the height direction Z. By setting the operating member 340, the position of the adjusting member 320 relative to the supporting column 310 can be easily adjusted, and the structure is simple, improving operating efficiency and convenience of use.

[0052] Please see Figure 2 , Figure 3 and Figure 4 According to some embodiments of this application, optionally, a limiting groove 321 is provided on the outer wall of the adjusting member 320, and the snap-fit ​​member 330 is sleeved in the limiting groove 321 and rotatably connected within the limiting groove 321. Specifically, a rotating hole 331 is provided on the snap-fit ​​member 330, and the snap-fit ​​member 330 is sleeved in the limiting groove 321 through the rotating hole 331. The rotating hole 331 is provided through the snap-fit ​​member 330. The snap-fit ​​member 330 can rotate on the adjusting member 320 but will not undergo axial movement.

[0053] By setting the limiting groove 321, the position of the snap-fit ​​component 330 can be limited to prevent the snap-fit ​​component 330 from shifting.

[0054] Please see Figure 1 , Figure 2 and Figure 5 According to some embodiments of this application, optionally, the positioning member 210 includes a snap-fit ​​portion 211 and two enclosure portions 212. The snap-fit ​​portion 211 can snap into the snap-fit ​​member 330. The two enclosure portions 212 are spaced apart at the end of the snap-fit ​​portion 211 away from the snap-fit ​​member 330, and extend obliquely toward the side away from the snap-fit ​​member 330. The two enclosure portions 212 of the two positioning members 210 together enclose a receiving space for accommodating the valve stem 130.

[0055] The snap-fit ​​component 330 has a snap-fit ​​groove 332. By rotating the snap-fit ​​component 330, the snap-fit ​​part 211 can be snapped into the snap-fit ​​groove 332 to achieve positioning of the snap-fit ​​component 330. When it is necessary to remove the snap-fit ​​part 211 from the snap-fit ​​groove 332, simply rotate the snap-fit ​​component 330. The operation is simple, convenient and quick, which can improve work efficiency.

[0056] The included angles between the two enclosure portions 212 and the engaging portion 211 are both obtuse angles. For example, the included angle between the two enclosure portions 212 is 90°. The included angle between the two enclosure portions 212 and the engaging portion 211 is 135°.

[0057] Please see Figure 1 , Figure 2 and Figure 5 According to some embodiments of this application, optionally, the enclosure portion 212 is provided with a plurality of positioning holes 214, which are spaced apart along the extending direction of the enclosure portion 212. The insert 400 is threadedly connected to the positioning holes 214. Specifically, the insert 400 has a third thread, and the positioning holes 214 are provided with a fourth thread adapted to the third thread. When it is necessary to adjust the position of the insert 400 in the height direction Z, it is only necessary to rotate the insert 400.

[0058] In one embodiment, the positioning holes 214 have different diameters to accommodate inserts 400 of different diameters. In another embodiment, the positioning holes 214 have the same diameter. In this embodiment, the number of enclosure portions 212 and the number of inserts 400 are four, which ensures the stability of packing 120 removal.

[0059] By providing several positioning holes 214 to accommodate valve stems 130 of different diameters, the removal of different types of packing 120 can be achieved, providing versatility in use. In use, the insert 400 simply needs to be inserted into the corresponding positioning hole 214.

[0060] Please see Figure 1 , Figure 2 and Figure 5According to some embodiments of this application, optionally, the positioning member 210 further includes two connecting portions 213, which are respectively connected to the ends of the two enclosure portions 212 away from the snap-fit ​​portion 211, and the connecting portions 213 extend in a direction away from the receiving space. The two connecting portions 213 of a positioning member 210 are detachably connected by a mating structure 500. Specifically, a rounded corner is also provided between the connecting portion 213 and the enclosure portion 212.

[0061] By extending the connecting portion 213 in a direction away from the receiving space, the connection between the two positioning members 210 can be facilitated.

[0062] Please see Figure 1 , Figure 2 and Figure 5 According to some embodiments of this application, optionally, the mating structure 500 includes a connecting rod 510, two locking nuts 520, and a connecting hole formed on the connecting portion 213. The connecting rod 510 includes a rotating portion 511 and a locking portion 512. The rotating portion 511 is rotatably connected to one of the two connecting holes, and the locking portion 512 passes through the other of the two connecting holes. Both locking nuts 520 are threadedly connected to the locking portion 512 and are respectively disposed on both sides of the connecting hole on the locking portion 512.

[0063] By rotatably connecting the rotating part 511 to one of the two connecting holes, and with the locking part 512 passing through the other connecting hole, the connecting rod 510 can only rotate without axial movement. When installation or disassembly is required, only the two locking nuts 520 need to be adjusted.

[0064] Please see Figure 1 , Figure 2 and Figure 5 According to some embodiments of this application, optionally, the inner sidewall of the enclosure 212 is provided with anti-scratch strips 220. Since the positioning member 210 will drive the insertion member 400 to move along the height direction Z, and there is a gap between the positioning member 210 and the valve stem 130.

[0065] By incorporating the anti-scratch plate 220, damage to the valve stem 130 can be prevented. The anti-scratch plate 220 is made of polytetrafluoroethylene (PTFE), and its smooth surface protects the valve stem 130 while also providing a guiding function.

[0066] Please see Figure 1 , Figure 2 and Figure 6According to some embodiments of this application, optionally, the insert 400 has a helical self-tapping head 410 capable of being inserted into the packing 120. By rotating the insert 400, the helical self-tapping head 410 at the end of the screw can be rotated, and a downward force can be continuously applied, thereby ensuring that the helical self-tapping head 410 rotates into the packing 120, thereby fixing the packing 120.

[0067] It should be noted that the packing 120 is made of graphite, nickel wire braid, and polytetrafluoroethylene, among other materials. To accommodate different packing 120 materials, a matching spiral self-tapping head 410 can be used.

[0068] The insert 400 also includes an insert rod, with a helical self-tapping head 410 disposed at the end of the insert rod. The helical self-tapping head 410 is inserted into the end of the self-tapping screw. To restrict the rotation of the helical self-tapping head 410, the two are connected by a square structure and secured with screws. More specifically, the insert rod includes a threaded portion 420, an extension portion 430, and a fixing portion 440. The threaded portion 420 is connected to the surrounding portion 212, and a third thread is disposed on the threaded portion 420. The fixing portion 440 is connected to the helical self-tapping head 410, and the extension portion 430 is disposed between the threaded portion 420 and the fixing portion 440. The extension portion 430 has a hexagonal structure. In this embodiment, the helical self-tapping heads 410 in the four inserts 400 are all different. In other embodiments, the helical self-tapping heads 410 in the four inserts 400 are all different.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A valve packing removal device for use with a valve, the valve comprising an installation chamber, packing, and a valve stem, wherein the bottom of the installation chamber has a placement groove for placing the packing; the valve stem passes through the installation chamber and the packing, characterized in that, The valve packing removal device includes: The positioning mechanism includes two opposing positioning members, which are detachably connected, and a receiving space for accommodating the valve stem is formed between the two positioning members. Two support mechanisms are provided, each including a support column, an adjusting member, and a locking member. The support column can abut against the top and bottom of the mounting chamber, and the height of the support column is adjustable. The adjusting member can be adjusted in position along the height direction and is mounted on the support column. The locking member is rotatably connected to the adjusting member. The two locking members can respectively lock into the two positioning members. An inserter, which is adjustable in position along the height direction and can be inserted into the packing; The adjusting component is sleeved on the supporting column, and the supporting column is provided with a first thread, and the adjusting component is provided with a second thread that is adapted to the first thread; The support mechanism also includes an operating component, which is connected to the adjusting component. By driving the operating component, the adjusting component can be moved along the height direction.

2. The valve packing removal device according to claim 1, characterized in that, The operating component is sleeved on the adjusting component, and the operating component is provided with a first tooth, while the adjusting component is provided with a second tooth that meshes with the first tooth.

3. The valve packing removal device according to claim 1, characterized in that, The outer wall of the adjusting member is provided with a limiting groove, and the snap-fit ​​member is sleeved in the limiting groove and rotatably connected to the limiting groove.

4. The valve packing removal device according to claim 1, characterized in that, The positioning member includes a snap-fit ​​portion and two surrounding portions. The snap-fit ​​portion can snap into the snap-fit ​​member. The two surrounding portions are spaced apart at the end of the snap-fit ​​portion away from the snap-fit ​​member and extend obliquely toward the side away from the snap-fit ​​member.

5. The valve packing removal device according to claim 4, characterized in that, The enclosure portion is provided with a plurality of positioning holes, which are spaced apart along the extension direction of the enclosure portion; the insert is threadedly connected to the positioning holes.

6. The valve packing removal device according to claim 4, characterized in that, The positioning member further includes two connecting portions, which are respectively connected to one end of the two enclosure portions away from the snap-fit ​​portion, and the connecting portions extend in a direction away from the receiving space; the two connecting portions of the positioning member are detachably connected by a mating structure.

7. The valve packing removal device according to claim 6, characterized in that, The mating structure includes a connecting rod, two locking nuts, and a connecting hole on the connecting part. The connecting rod includes a rotating part and a locking part. The rotating part is rotatably connected to one of the two connecting holes, and the locking part passes through the other of the two connecting holes. Both locking nuts are threadedly connected to the locking part and are respectively located on both sides of the connecting hole on the locking part.

8. The valve packing removal device according to claim 4, characterized in that, The inner wall of the enclosure is provided with anti-scratch plates; And / or, the insert has a helical self-tapping head capable of being inserted into the packing.

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