A packing clamping device

Abstract

This utility model relates to the field of blast furnace production technology, and in particular to a packing clamping device. The packing clamping device of this application includes a main pressure cover and a secondary pressure cover. The main pressure cover is movably sleeved on the valve stem, with at least a portion extending into the flange box to clamp the first packing. A sealing groove is provided on the side of the main pressure cover away from the flange box, and the sealing groove is located near the valve stem. The sealing groove is used to fill a second packing, and the second packing contacts the valve stem. The secondary pressure cover is movably sleeved on the valve stem, located on the side of the main pressure cover away from the flange box, with at least a portion extending into the sealing groove to clamp the second packing. The packing clamping device provided in this application can improve the production efficiency of the blast furnace.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace production technology, and in particular to a packing packing clamping device. Background Technology

[0002] The blast furnace hot blast stove plays a crucial role in supplying hot air to the blast furnace during production. The switching of combustion and air supply states is achieved through the operation of various valves. The blast furnace hot blast stove area contains numerous valves. The valve stems are sealed using packing seals. This involves cutting packing to the appropriate size and inserting it into the flange box, then pressing the gland onto the packing. The lower edge of the gland must be inserted into the flange box. By adjusting the compression of the packing, it is tightened to grip the valve stem, preventing leakage of the medium from this point and achieving a seal.

[0003] The compression capacity of packing is limited. When the compression capacity of the packing reaches its limit, it needs to be repacked. The hot blast stove process dictates that some valve stem seals are constantly under pressure during production. Since it's impossible to directly repack the valve stem seals under pressure, packing can only be repacked at each maintenance interval to ensure the packing compression capacity within a maintenance cycle. However, in related technologies, if the packing becomes loose during production, leading to media leakage, production must be stopped, impacting efficiency. Utility Model Content

[0004] This application provides a packing clamping device, which to some extent improves the technical problem in related technologies where, if the sealing packing is found to be loose during the maintenance cycle, resulting in media leakage, production must be stopped, thus affecting production efficiency.

[0005] This application provides a packing clamping device applied to a valve. The valve includes a valve body, a valve stem, a first packing, and a flange box. The valve stem cooperates with the valve body, the flange box is installed in the valve body, a portion of the valve stem is located within the flange box, and the first packing fills the space between the valve stem and the flange box. The packing clamping device includes:

[0006] The main pressure cap is movably sleeved on the valve stem. At least a portion of the main pressure cap extends into the flange box to press the first packing. A sealing groove is provided on the side of the main pressure cap away from the flange box. The sealing groove is located close to the valve stem. The sealing groove is used to fill the second packing, and the second packing contacts the valve stem.

[0007] A secondary pressure cap is movably sleeved on the valve stem. The secondary pressure cap is located on the side of the main pressure cap away from the flange box. At least part of the secondary pressure cap extends into the sealing groove to press the second packing.

[0008] In some embodiments, the main pressure cap includes a first main body and a first pressing part connected together. The first pressing part is disposed on the side of the first main body near the pressure flange box. Both the first main body and the first pressing part are sleeved on the valve stem. The first pressing part extends into the pressure flange box to press the first packing. The sealing groove is disposed on the first main body.

[0009] In some embodiments, the packing clamping device further includes a screw and a first nut, the first main body having a first through hole, the screw passing through the first through hole and screwed into a screw hole on the clamping box, and the first nut located on the side of the first main body away from the first clamping part.

[0010] In some embodiments, the dimensions of the first packing and the screw are marked on the first body portion.

[0011] In some embodiments, the first clamping part is marked with scale lines.

[0012] In some embodiments, the secondary pressure cap includes a second main body and a second clamping part connected together, both the second main body and the second clamping part being sleeved on the valve stem, and the second clamping part extending into the sealing groove to clamp the second packing.

[0013] In some embodiments, the packing clamping device further includes a second nut, the second body portion having a second through hole, the screw passing through the second through hole, and the second nut located on the side of the second body portion away from the second clamping portion.

[0014] In some embodiments, the dimensions of the second packing and the screw are marked on the second body.

[0015] In some embodiments, the second clamping part is marked with scale lines.

[0016] In some embodiments, the sub-cap has an assembly hole through which the valve stem passes. The sub-cap includes a first cap portion and a second cap portion, which are connected to form the assembly hole. The first cap portion and the second cap portion are detachably connected.

[0017] The beneficial effects of this application are as follows:

[0018] In the packing clamping device provided in this application, when the tightness of the first packing is insufficient during production, causing medium leakage in the valve, the second packing is filled into the sealing groove of the main pressure plate, and the second packing contacts the valve stem. The second packing is then pressed by the auxiliary pressure plate so that the second packing grips the valve stem, thereby sealing the valve. This allows blast furnace production to continue without shutdown, thus improving production efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model.

[0020] Figure 1 A schematic diagram of the packing clamping device and valve assembly is shown.

[0021] Figure 2 It shows Figure 1 A schematic diagram of the structure of the main pressure cap.

[0022] Figure 3 It shows Figure 2 Top view.

[0023] Figure 4 It shows Figure 1 A schematic diagram of the structure of the middle auxiliary pressure cap.

[0024] Figure 5 It shows Figure 4 Top view.

[0025] Explanation of reference numerals in the attached figures:

[0026] 10-Valve, 11-Valve body, 12-Valve stem, 13-First packing, 14-Flange box, 14a-Screw hole, 15-Second packing, 20-Packing clamping device, 100-Main gland, 110-First main body, 111-Sealing groove, 112-First through hole, 113-Dimension mark of the first packing, 114-Dimension mark of the screw, 115-Scale line, 120-First clamping part, 200-Second gland, 200a-First gland part, 200b-Second gland part, 210-Second main body, 211-Second through hole, 212-Dimension mark of the second packing, 220-Second clamping part, 230-Bolt, 240-Assembly hole, 300-Screw, 310-First nut, 320-Second nut. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Please see Figure 1 This application provides a packing clamping device 20, applied to a valve 10 in a blast furnace hot blast stove. The valve 10 includes a valve body 11, a valve stem 12, a first packing 13, and a flange box 14. The valve stem 12 cooperates with the valve body 11, and the flange box 14 is installed on the valve body 11. A portion of the valve stem 12 is located within the flange box 14. The first packing 13 fills the space between the valve stem 12 and the flange box 14 to seal the valve stem 12 and prevent media leakage. The packing clamping device 20 provided in this application can improve the production efficiency of the blast furnace.

[0032] In this embodiment, the packing clamping device 20 includes a main pressure cap 100 and a secondary pressure cap 200. The main pressure cap 100 is movably sleeved on the valve stem 12, with at least a portion of the main pressure cap 100 extending into the flange box 14 to clamp the first packing 13. A sealing groove 111 is provided on the side of the main pressure cap 100 away from the flange box 14, and the sealing groove 111 is located near the valve stem 12. The sealing groove 111 is used to fill the second packing 15, and the second packing 15 contacts the valve stem 12. The secondary pressure cap 200 is movably sleeved on the valve stem 12, located on the side of the main pressure cap 100 away from the flange box 14, with at least a portion of the secondary pressure cap 200 extending into the sealing groove 111 to clamp the second packing 15.

[0033] At least a portion of the main pressure cap 100 extends into the flange box 14, thereby compressing the first packing 13 so that the first packing 13 grips the valve stem 12, achieving a seal. Since the main pressure cap 100 is movably sleeved on the valve stem 12, the main pressure cap 100 can compress the first packing 13 by moving towards it, and the amount of compression of the first packing 13 can be adjusted by adjusting the amount of movement of the main pressure cap 100.

[0034] Since the sealing groove 111 of the main pressure cap 100 is used to fill the second packing 15, and the second packing 15 is in contact with the valve stem 12, when the tightening of the first packing 13 is insufficient during blast furnace production, the second packing 15 can be filled into the sealing groove 111. Since at least part of the secondary pressure cap 200 extends into the sealing groove 111, the second packing 15 can be compressed, causing the second packing 15 to grip the valve stem 12 and achieve a seal. Since the secondary pressure cap 200 is movably sleeved on the valve stem 12, the secondary pressure cap 200 can be moved towards the second packing 15 to compress the second packing 15, and the compression of the second packing 15 can be adjusted by adjusting the amount of movement of the secondary pressure cap 200.

[0035] In the initial stage, only the main pressure cap 100 needs to be installed on the valve stem 12. The main pressure cap 100 presses the first packing 13 in the flange box 14 to achieve a seal. If the tightening of the first packing 13 is sufficient throughout the production period, the second packing 15 does not need to be filled, thus eliminating the need to install the auxiliary pressure cap 200. However, if the tightening of the first packing 13 is insufficient during production, resulting in a weakened sealing effect and media leakage, the valve stem 12 is under pressure, so packing cannot be directly filled into the flange box 14. Therefore, the second packing 15 can be filled into the sealing groove 111 of the main pressure cap 100, and the auxiliary pressure cap 200 can be installed. The auxiliary pressure cap 200 presses the second packing 15, and since the second packing 15 is in contact with the valve stem 12, a seal is achieved without stopping production, thereby improving the production efficiency of the blast furnace.

[0036] Please see Figure 2In some embodiments, the main pressure cap 100 includes a first main body 110 and a first pressing part 120 connected together. The first pressing part 120 is disposed on the side of the first main body 110 near the pressure flange box 14. The first main body 110 and the first pressing part 120 are both sleeved on the valve stem 12. The first pressing part 120 extends into the pressure flange box 14 to press the first packing 13. The sealing groove 111 is disposed on the first main body 110.

[0037] The first main body 110 can be plate-shaped, and the first pressing part 120 can be cylindrical. The first pressing part 120 has a certain length, thereby adjusting the amount of pressing on the first packing 13. The sealing groove 111 is annular and surrounds the valve stem 12. Specifically, the sealing groove 111 has a bottom wall and a side wall arranged at an angle. The side wall is located on the side of the bottom wall away from the valve stem 12. A filling space is formed between the bottom wall, the side wall, and the outer peripheral surface of the valve stem 12. The second packing 15 fills this filling space, thereby achieving contact between the second packing 15 and the valve stem 12.

[0038] Please see Figures 1-3 In some embodiments, the packing clamping device 20 further includes a screw 300 and a first nut 310. The first main body 110 has a first through hole 112. The screw 300 passes through the first through hole 112 and is screwed into a screw hole 14a on the clamping box 14. The first nut 310 is located on the side of the first main body 110 away from the first clamping part 120.

[0039] Since the first clamping part 120 is located on the side of the first main body 110 near the pressure plate box 14, and the first nut 310 is located on the side of the first main body 110 away from the first clamping part 120, the first nut 310 is threaded in the direction of the first packing 13. This allows the first main body 110 to drive the first clamping part 120 to move closer to the first packing 13, thereby pressing the first clamping part 120 against the first packing 13. Furthermore, since the screw 300 is screwed into the screw hole 14a on the pressure plate box 14, the screw 300 and the first nut 310 can be used together to fix the first main body 110 and the pressure plate box 14, thereby locking the main cover plate and fixing its position to maintain the pressure on the first packing 13.

[0040] Specifically, first through holes 112 can be provided on both sides of the first main body 110. The two first through holes 112 correspond to the two screw holes 14a on the pressure box 14, so that the first main body 110 is subjected to uniform force and can maintain balance during movement.

[0041] In some embodiments, the first main body 110 is provided with a size mark 113 for the first packing 13 and a size mark 114 for the screw 300.

[0042] In actual production, due to the large number and varying sizes of valves 10 in the hot blast furnace area, the packing dimensions used for sealing also differ. Therefore, multiple types of packing need to be prepared on-site for backup. However, the personnel participating in each maintenance operation are different, making it impossible to visually determine the packing dimensions at the sealing point. They can only open the gland at the valve stem 12 sealing point to measure the internal packing dimensions, then select the appropriate type of packing for cutting to achieve the same size, and finally fill the packing, which severely impacts work efficiency.

[0043] Furthermore, due to the influence of on-site working conditions, the disassembly and assembly of some valve stem 12 sealing parts require wrenches of specific sizes. However, the wrench size cannot be accurately determined by visual inspection. During the construction process, maintenance personnel need to measure with measuring tools in advance and then prepare tools of the corresponding size, which will also affect the construction progress.

[0044] Therefore, in this embodiment, the dimensions of the first packing 13 and the screw 300 are marked on the first main body 110, so that a suitable tool can be selected without measurement and the dimensions of the first packing 13 can be known without removing the main pressure cap 100. This solves the problem that the dimensions of the first packing 13 cannot be known before the main pressure cap 100 is removed during the production process and the tool dimensions cannot be accurately determined by visual inspection, thereby improving production efficiency.

[0045] Specifically, to facilitate inspection by maintenance personnel, the dimensions of the first packing 13 and the screw 300 can be marked on the outer peripheral surface of the first main body 110.

[0046] In some embodiments, the first clamping part 120 is marked with scale lines 115.

[0047] When installing the main pressure cap 100, the circumference of the bottom end of the first clamping part 120 must be completely inserted into the flange box 14. Otherwise, if leakage occurs at the valve stem 12 seal and the main pressure cap 100 needs to be moved to compress the first packing 13, the bottom end of the first clamping part 120 will easily make hard contact with the upper edge of the flange box 14, which will cause the main pressure cap 100 to crack and cause a serious leakage accident. Since the gap between the outer diameter of the bottom end of the first pressing part 120 and the inner diameter of the pressure box 14 is very small, when the main pressure cover 100 is reinstalled after the new first packing 13 is filled, there is no visible reference to determine whether the bottom end of the first pressing part 120 has completely entered the pressure box 14. Therefore, in this embodiment, the first pressing part 120 is marked with a scale line 115, so that when installing the main pressure cover 100, the scale line 115 can be observed to determine whether the bottom end of the first pressing part 120 has completely entered the pressure box 14, thus improving the installation convenience of the main pressure cover 100.

[0048] Specifically, the scale values ​​are marked on the scale line 115. The magnitude and direction of the scale values ​​need to be determined according to the spacing of the scale lines 115 and the on-site working conditions. The scale values ​​are evenly distributed along the circumference of the scale line 115 they represent, and are marked sequentially from zero from the lower edge to the upper edge of the first pressing part 120. The scale values ​​marked on the surface of the first pressing part 120 do not protrude from the surface of the first pressing part 120, and the marking should not be too deep, just enough for maintenance personnel to see clearly.

[0049] Please see Figure 4 In some embodiments, the secondary pressure cap 200 includes a second main body 210 and a second pressing part 220 connected together. The second main body 210 and the second pressing part 220 are both sleeved on the valve stem 12. The second pressing part 220 extends into the sealing groove 111 to press the second packing 15.

[0050] The second pressing part 220 is disposed on the side of the second main body 210 near the main pressure cover 100. The second main body 210 can be plate-shaped, and the second pressing part 220 can be cylindrical. The second pressing part 220 has a certain length, thereby adjusting the amount of pressing on the second packing 15.

[0051] Please see Figure 1 and Figure 4 In some embodiments, the packing clamping device 20 further includes a second nut 320, the second main body 210 has a second through hole 211, the screw 300 passes through the second through hole 211, and the second nut 320 is located on the side of the second main body 210 away from the second clamping part 220.

[0052] That is, the screw 300 can be simultaneously inserted into the first through hole 112 and the second through hole 211. Since the second clamping part 220 is located on the side of the second main body 210 near the main pressure cover 100, and the second nut 320 is located on the side of the second main body 210 away from the second clamping part 220, the second nut 320 is threaded in the direction of the second packing 15. This allows the second main body 210 to drive the second clamping part 220 to move closer to the second packing 15, thereby pressing the second packing 15 with the second clamping part 220. Since the screw 300 is screwed into the screw hole 14a on the pressure flange box 14, the screw 300 and the second nut 320 can be jointly fixedly connected to the second main body 210 and the pressure flange box 14, thereby locking the sub-cover plate and fixing the position of the sub-cover plate to maintain the pressing of the second packing 15.

[0053] Specifically, second through holes 211 can be provided on both sides of the second main body 210. The two second through holes 211 correspond to the two first through holes 112 on the first main body 110, so that the second main body 210 is subjected to uniform force and can maintain balance during movement.

[0054] Similarly, the second main body is also provided with a size mark 212 for the second packing 15 and a size mark 114 for the screw 300. The second clamping part 220 is marked with a scale line 115. The function of the marking is the same as that of the size mark for the first packing 13 and the screw 300 on the first main body and the scale line 115 on the first clamping part 120, as described above. It will not be repeated here.

[0055] Please see Figure 5 In some embodiments, the secondary pressure cap 200 has an assembly hole 240 through which the valve stem 12 passes. The secondary pressure cap 200 includes a first pressure cap portion 200a and a second pressure cap portion 200b, which are connected to form the assembly hole 240. The first pressure cap portion 200a and the second pressure cap portion 200b are detachably connected.

[0056] The valve stem 12 passes through the assembly hole 240 so that the secondary pressure cap 200 is fitted onto the valve stem 12. Since the secondary pressure cap 200 is installed onto the valve stem 12 during the production process, and other components are located on the upper part of the valve stem 12 during production, it is inconvenient to fit the secondary pressure cap 200 onto the valve stem 12 from the top. Therefore, the secondary pressure cap 200 includes a first pressure cap portion 200a and a second pressure cap portion 200b that are detachably connected. When installing the secondary pressure cap 200, the first pressure cap portion 200a and the second pressure cap portion 200b are first separated, and then the first pressure cap portion 200a and the second pressure cap portion 200b are respectively fitted onto the valve stem 12 to form the assembly hole 240 that mates with the valve stem 12. Finally, the first pressure cap portion 200a and the second pressure cap portion 200b are connected.

[0057] Specifically, the secondary pressure cap 200 also includes two bolts 230, one of which connects one end of the first pressure cap portion 200a and the second pressure cap portion 200b, and the other bolt 230 connects the other end of the first pressure cap portion 200a and the second pressure cap portion 200b, so that the first pressure cap portion 200a and the second pressure cap portion 200b are connected as one unit.

[0058] Since the secondary pressure cap 200 includes a connected second main body 210 and a second clamping part 220, the second main body 210 includes two parts, and the second clamping part 220 also includes two parts. One part of the second main body 210 and the corresponding one part of the second clamping part 220 form a first pressure cap 200a, and the other part of the second main body 210 and the corresponding other part of the second clamping part 220 form a second pressure cap 200b. Two bolts 230 can be provided on the second main body 210.

[0059] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0060] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A packing compression device applied to a valve, the valve comprising a valve body, a valve stem, a first packing and a gland box, the valve stem being cooperated with the valve body, the gland box being installed to the valve body, a part of the valve stem being located in the gland box, the first packing being filled between the valve stem and the gland box, characterized in that, The packing clamping device includes: The main pressure cap is movably sleeved on the valve stem. At least a portion of the main pressure cap extends into the flange box to press the first packing. A sealing groove is provided on the side of the main pressure cap away from the flange box. The sealing groove is located close to the valve stem. The sealing groove is used to fill the second packing, and the second packing contacts the valve stem. A secondary pressure cap is movably sleeved on the valve stem. The secondary pressure cap is located on the side of the main pressure cap away from the flange box. At least part of the secondary pressure cap extends into the sealing groove to press the second packing.

2. The packing press device according to claim 1, characterized by The main pressure cap includes a first main body and a first pressing part connected together. The first pressing part is disposed on the side of the first main body near the pressure flange box. Both the first main body and the first pressing part are sleeved on the valve stem. The first pressing part extends into the pressure flange box to press the first packing. The sealing groove is disposed on the first main body.

3. The packing press device according to claim 2, characterized in that, The packing clamping device further includes a screw and a first nut. The first main body has a first through hole. The screw passes through the first through hole and is screwed into a screw hole on the clamping box. The first nut is located on the side of the first main body away from the first clamping part.

4. The packing press device according to claim 3, characterized in that The first main body is provided with the size markings of the first packing and the screw.

5. The packing press device according to claim 3, wherein The first pressing part is marked with scale lines.

6. The packing press device according to claim 3, wherein The secondary pressure cap includes a second main body and a second pressing part connected together. Both the second main body and the second pressing part are sleeved on the valve stem. The second pressing part extends into the sealing groove to press the second packing.

7. The packing press device according to claim 6, characterized in that The packing clamping device further includes a second nut, the second main body has a second through hole, the screw passes through the second through hole, and the second nut is located on the side of the second main body away from the second clamping part.

8. The packing press device according to claim 6, characterized by The second body is provided with size markings for the second packing and the screw.

9. The packing press device according to claim 6, characterized by The second pressing part is marked with scale lines.

10. A packing compression device according to any one of claims 1-9, characterized in that The secondary pressure cap has an assembly hole through which the valve stem passes. The secondary pressure cap includes a first pressure cap portion and a second pressure cap portion, which are connected to form the assembly hole. The first pressure cap portion and the second pressure cap portion are detachably connected.

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