Packing structure of control valve

Abstract

The utility model discloses a packing structure of a control valve, and belongs to the technical field of control valves. The valve mainly comprises a valve body, a containing cavity is formed in the valve body, and a control rod is arranged in the containing cavity; the press fitting part comprises two sets of fixing blocks installed outside the valve body, bolts are rotationally installed on the two sides of each fixing block, pressing plates are arranged on the bolts, and through installation holes are formed in the two sides of each pressing plate; the packing assembly comprises a packing block, multiple sets of inserting blocks are detachably installed at the bottom of the packing block, one side of each inserting block extends outwards to be provided with a hooking block, multiple sets of arc-shaped connecting grooves are formed in the top of the packing block, one side of each connecting groove is provided with a mounting groove in a communicating mode, and the size of each mounting groove is matched with the size of each hooking block. According to the packing structure of the control valve, by arranging the packing assembly, the multiple sets of packing blocks can be combined with one another, the packing assembly can be completely taken out at a time when the packing assembly is taken out, and the replacement efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of control valve technology, specifically to a control valve packing structure. Background Technology

[0002] The packing of a control valve typically consists of a stuffing box assembly and packing material. The stuffing box assembly houses the packing and related components, providing a resilient dynamic seal on the valve stem to prevent leakage of process fluid through the moving valve stem surface. The packing material fills the stuffing box, making tight contact with the valve stem to form a seal.

[0003] For example, the patent with publication number CN210770628U discloses a packing sealing structure for a regulating valve. It uses a combination design of PTFE packing and graphite packing, with the graphite packing located close to the inner cavity of the upper valve cover. The graphite packing has higher stability, which can ensure sealing while reducing corrosion and protecting the PTFE packing, thus achieving a better sealing effect.

[0004] In the aforementioned patent, the packing structure, through the setting of a combined packing structure, can reduce corrosion while ensuring sealing, thus achieving a better sealing effect. However, since most existing packings are manually inserted into the stuffing box of the control valve, the graphite packing may need to be replaced periodically after the control valve has been used for a long time. In this case, the control valve must be closed first, and then the entire cover must be opened before the packings inside are removed one by one using tools. This replacement method is quite cumbersome. Therefore, it is necessary to provide a control valve packing structure that can be quickly removed to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a control valve packing structure that enables rapid replacement of the packing inside the control valve.

[0007] The technical solution adopted by this application to solve its technical problem is as follows: a control valve packing structure, including a valve body, the valve body having an internal receiving cavity, and a control rod disposed within the receiving cavity; a press-fitting part, the press-fitting part including two sets of fixing blocks installed on the outside of the valve body, bolts being rotatably installed on both sides of the fixing blocks, pressure plates being provided on the bolts, and through mounting holes being provided on both sides of the pressure plates; a packing assembly, the packing assembly being disposed between the valve body and the control rod, the packing assembly including: a packing block, multiple sets of insert blocks being detachably installed at the bottom of the packing block, a hook block extending outward from one side of the insert block, multiple sets of arc-shaped connecting grooves being provided at the top of the packing block, and an installation groove being connected to one side of the connecting groove, the size of the installation groove being adapted to the size of the hook block.

[0008] Furthermore, the length of the connecting groove is greater than the length of the hook block, and the depth of the connecting groove is adapted to the height of the insert block.

[0009] Furthermore, a pressure block is provided on the top of the packing block, an insert block is installed at the bottom of the pressure block, and the top of the pressure block is in contact with the pressure plate.

[0010] Furthermore, the top of the pressure block is provided with a mounting rod, and the top of the mounting rod has two sets of suction cups.

[0011] Furthermore, rubber layers are provided at both the top and bottom of the filler block.

[0012] The beneficial effects of this application are: the control valve packing structure provided by this application, by setting packing assemblies, allows multiple sets of packing blocks to be combined with each other. When removing, the packing assembly can be completely removed at one time, which speeds up the replacement efficiency. At the same time, since multiple sets of packing blocks are set, when a certain set of packing blocks is replaced, it can be replaced individually, saving material costs.

[0013] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0014] 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.

[0015] In the attached diagram:

[0016] Figure 1 This is an overall schematic diagram of a control valve packing structure according to this application;

[0017] Figure 2 for Figure 1 Schematic diagram of the internal structure of the valve body;

[0018] Figure 3for Figure 2 Schematic diagram of the structure of the filler assembly;

[0019] Figure 4 for Figure 3 Schematic diagram of the structure of the filler block;

[0020] Figure 5 for Figure 4 Connection diagram of the mounting rod;

[0021] The following are the labeling elements in the figure:

[0022] 1. Valve body; 11. Receiving cavity; 12. Control rod; 2. Packing assembly; 21. Packing block; 211. Through hole; 22. Insert block; 23. Hook block; 24. Connecting groove; 25. Mounting groove; 3. Rubber layer; 4. Press-fit part; 41. Fixing block; 42. Bolt; 43. Pressure plate; 5. Pressure block; 51. Mounting rod; 52. Suction cup. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] like Figures 1-2 As shown, this application provides a control valve packing structure, including a valve body 1, which is a conventional control valve in this application, containing a fluid passage for controlling the flow, pressure or direction of fluid;

[0026] Meanwhile, a receiving cavity 11 is provided inside the valve body 1, and a control rod 12 is provided inside the receiving cavity 11. A valve disc is provided at the bottom of the control rod 12. The control rod 12 is used to control the opening or closing of the valve body 1. At the same time, a packing assembly 2 is also provided inside the receiving cavity 11. The packing assembly 2 fills the space between the receiving cavity 11 and the control rod 12, and is in close contact with the control rod 12 to form a seal.

[0027] Meanwhile, a pressing part 4 is also provided on the top of the packing assembly 2. The pressing part 4 includes two sets of fixing blocks 41 fixedly installed on the outside of the valve body 1. Bolts 42 are rotatably installed on both sides of the fixing blocks 41. At the same time, a pressure plate 43 is provided on the top of the packing assembly 2. The pressure plate 43 has through mounting holes on both sides. During installation, the pressure plate 43 can be passed through the bolts 42 and made into contact with the packing assembly 2. Then, nuts are installed on the bolts 42 to press the packing assembly 2 tightly, thereby completing the fixing of the packing assembly 2.

[0028] like Figures 2-4 As shown, the packing assembly 2 includes a packing block 21 with a through hole 211 in the middle. The size of the through hole 211 is adapted to the size of the control rod 12, so that the packing block 21 will not affect the control rod 12 when it rotates. At the same time, multiple sets of insert blocks 22 are detachably installed at the bottom of the packing block 21. A hook block 23 is provided on one side of the insert block 22. At the same time, multiple sets of arc-shaped connecting grooves 24 are provided at the top of the packing block 21. The length of the connecting groove 24 is greater than the length of the hook block 23, and the depth of the connecting groove 24 is adapted to the height of the insert block 22, so that the insert block 22 can be quickly installed inside the connecting groove 24.

[0029] Meanwhile, an installation groove 25 is provided on one side of the connecting groove 24. The size of the installation groove 25 is adapted to the size of the hook block 23. When the two sets of packing blocks 21 are stacked on each other, the insert 22 at the bottom of one set of packing blocks 21 will extend into the interior of the connecting groove 24. At this time, the two sets of packing blocks 21 will contact each other. In order to increase the sealing of the equipment, rubber layers 3 are provided on the top and bottom of the packing blocks 21. During installation, the two sets of rubber layers 3 will stick together, thereby reducing the gap between the two sets of packing blocks 21 and ensuring the stability and sealing of the insert 22 in the connecting groove 24.

[0030] like Figures 3-5 As shown, in order to compress the packing, a pressure block 5 is also provided on the top of the packing block 21. The bottom of the pressure block 5 is also equipped with an insert block 22. When the packing block 21 needs to be installed, the insert block 22 located below the packing block 21 at the bottom is first removed. Then, a certain number of packing blocks 21 are selected according to the depth of the receiving cavity 11, and multiple sets of packing blocks 21 are placed into the receiving cavity 11 in sequence. At this time, multiple sets of packing blocks 21 will be combined with the insert block 22 through the connecting groove 24 without leaving gaps. Then, the pressure block 5 is placed on the top of the packing block 21, and the pressure block 5 is pressed by the pressure plate 43, so that the packing assembly 2 seals the receiving cavity 11.

[0031] To facilitate the quick removal of the packing assembly 2, an installation rod 51 is provided on the top of the pressure block 5. The top of the installation rod 51 has two sets of suction cups 52, which are suitable for fixing to the top of the pressure block 5 by negative pressure. When it is necessary to remove the packing assembly 2, the pressure block 5 is first removed, and then the control rod 12 is removed from the valve body 1. At this time, the installation rod 51 can be installed on the top of the pressure block 5 through the suction cups 52. Then, by rotating the installation rod 51, the pressure block 5 is rotated, so that the hook block 23 on the outside of the bottom insert 22 of the pressure block 5 is engaged in the installation groove 25. As the installation rod 51 continues to rotate, each packing block 21 at the bottom is connected to the installation groove 25 through the hook block 23. At this time, the packing assembly 2 can be pulled out from the receiving cavity 11 as a whole by pulling the installation rod 51, without having to disassemble the valve body 1 to remove it, thus increasing the replacement efficiency of the device.

[0032] In summary, this device, by setting up the packing assembly 2, allows multiple sets of packing blocks 21 to be combined with each other. When removing the packing assembly 2, it can be completely removed at once, which speeds up the replacement efficiency. At the same time, since there are multiple sets of packing blocks 21, when one set of packing blocks 21 is replaced, it can be replaced individually, saving material costs.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control valve packing structure, characterized in that: include: A valve body (1) is provided inside a receiving cavity (11), and a control rod (12) is provided inside the receiving cavity (11); The pressing part (4) includes two sets of fixing blocks (41) installed on the outside of the valve body (1). Bolts (42) are rotatably installed on both sides of the fixing blocks (41). Pressure plates (43) are provided on the bolts (42). Through mounting holes are provided on both sides of the pressure plates (43). A packing assembly (2) disposed between the valve body (1) and the control lever (12), the packing assembly (2) comprising: The packing block (21) has multiple sets of insert blocks (22) detachably installed at its bottom. A hook block (23) extends outward from one side of each insert block (22). Multiple sets of arc-shaped connecting grooves (24) are provided at the top of the packing block (21). An installation groove (25) is connected to one side of each connecting groove (24). The size of the installation groove (25) is adapted to the size of the hook block (23).

2. The control valve packing structure according to claim 1, characterized in that: The length of the connecting groove (24) is greater than the length of the hook block (23), and the depth of the connecting groove (24) is adapted to the height of the insert block (22).

3. The control valve packing structure according to claim 2, characterized in that: The top of the packing block (21) is also provided with a pressure block (5), and the bottom of the pressure block (5) is provided with an insert block (22). The top of the pressure block (5) is in contact with the pressure plate (43).

4. The control valve packing structure according to claim 3, characterized in that: The top of the pressure block (5) is provided with an installation rod (51), and the top of the installation rod (51) has two sets of suction cups (52).

5. The control valve packing structure according to claim 1, characterized in that: The top and bottom of the filler block (21) are provided with rubber layers (3).

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