Double packing seal compression anti-loose device

Abstract

The utility model relates to valve technical field, concretely relates to a double -layer packing seal presss from both sides and prevents loose device, include: valve cover, packing mechanism and bearing mechanism, are equipped with two thread grooves, packing box, arc groove and two limit slots on valve cover, be provided with gland on valve cover, and the both ends of gland are all screw joint and have fixed bolt. In the utility model, packing mechanism is arranged in the inside of packing box, and packing mechanism is extruded by using the gland, makes two compression springs extrude shrink, to make the sliding shell extrude packing seal, and then two packing seals are fixed tightly, and multiple V type elastic sheets will promote multiple connecting plates to extrude packing seal, thereby guarantee the tightness when packing seal is connected with valve rod, and then two packing seals can effectively prevent the medium in the valve from leaking to the outside environment between the gap of valve rod and valve body, and two packing seals realize double protection.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a double-layer packing seal tightening and anti-loosening device. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. They can be classified into ball valves, check valves, butterfly valves, etc. To ensure the sealing of the moving valve stem during operation, a packing seal is installed on the upper part of the valve body, and some valve bodies use double-layer packing seals. Double-layer packing seals are simple in structure, easy to maintain, and have good sealing performance. However, in existing technology, the double packing of valves is tightened from the top down on one side, resulting in an unsatisfactory tightening effect of the lower packing after assembly. This leads to leakage in the lower packing, affecting its use. Utility Model Content

[0003] The purpose of this invention is to provide a double-layer packing sealing and tightening anti-loosening device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A double-layer packing seal tightening and anti-loosening device includes:

[0006] The valve cover has two threaded grooves, a stuffing box, an arc groove and two limiting grooves. The valve cover is provided with a pressure cap, and both ends of the pressure cap are screwed to a fixing bolt, and one end of each fixing bolt is screwed to the corresponding threaded groove.

[0007] The packing mechanism is disposed inside the stuffing box;

[0008] The supporting mechanism is located on the outside of the packing mechanism.

[0009] Furthermore, the packing mechanism includes:

[0010] A packing pad is disposed inside the stuffing gland;

[0011] Two packing seals are respectively installed at the top and bottom of the packing pad. Compensation components are provided on the outer side of both packing seals, and anti-loosening components are provided on the outer side of both packing seals.

[0012] Preferably, the compensation component includes:

[0013] The connecting shell is sealed and bonded to the corresponding filler at the top and bottom, and the inner sidewall of the connecting shell is provided with multiple guide grooves;

[0014] Multiple connecting plates are located inside the connecting shell, and one end of each of the multiple connecting plates is sealed and bonded to the filler.

[0015] Multiple V-shaped spring pieces, one end of which is fixedly connected to the inner wall of the connecting shell, and the other end of each V-shaped spring piece is fixedly connected to a corresponding connecting plate.

[0016] Preferably, guide blocks are fixedly connected to the top and bottom of the connecting plate, and the guide blocks are slidably connected to the corresponding guide grooves.

[0017] Preferably, the anti-loosening component includes:

[0018] An annular shell is disposed on the outside of the connecting shell, and a sliding shell is slidably connected inside the annular shell, and the sliding shell is sealed and bonded to the corresponding filler.

[0019] A compression spring is disposed inside the annular shell and the sliding shell, and both ends of the compression spring are fixedly connected to the inner sidewalls of the annular shell and the sliding shell, respectively.

[0020] Furthermore, the supporting mechanism includes:

[0021] A support shell is slidably inserted into the stuffing box, the support shell is disposed on the outside of the stuffing mechanism, and a limit assembly is provided on the top of the support shell;

[0022] Two arc-shaped plates are fixedly connected to the top of the outer wall of the bearing shell. The bottom of the two arc-shaped plates is in contact with the bottom surface of the arc-shaped groove. Limiting blocks are fixedly connected to the bottom of the two arc-shaped plates, and the two limiting blocks are respectively inserted into the corresponding limiting grooves.

[0023] Preferably, the limiting component includes:

[0024] Both arc-shaped shells are fixedly connected to the inner wall of the arc-shaped groove;

[0025] Two baffles are slidably connected to the interior of the two arc-shaped shells respectively. The bottom of the two baffles is in contact with the top of the corresponding arc-shaped plate, and a push block is fixedly connected to one end of each baffle.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. By setting a packing mechanism inside the stuffing box and using a gland to compress the packing mechanism, two compression springs are compressed and contracted, which in turn causes the sliding shell to compress the packing body, thereby pressing and fixing the two packing bodies. In addition, multiple V-shaped springs push multiple connecting plates to compress the packing body, thus ensuring the tightness of the connection between the packing body and the valve stem. The two packing bodies can effectively prevent the medium inside the valve from leaking into the external environment through the gap between the valve stem and the valve body. The two packing bodies provide double protection. When the packing body wears during use, multiple V-shaped springs push multiple connecting plates to move, causing the packing body to deform. The two compression springs can also deform the packing seal, thereby automatically compensating for the wear of the packing seal and ensuring the sealing effect of the packing mechanism during use.

[0028] 2. By setting a bearing mechanism on the outside of the packing mechanism and using the bearing shell to support the packing mechanism, the two arc-shaped plates are exposed by pushing the baffle to retract. By pulling out the bearing shell, the packing mechanism inside can be quickly removed as a whole, which facilitates the replacement or maintenance of the packing mechanism. Moreover, no tools are needed when removing it, making it more convenient to use. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram showing the positional relationship between the valve cover and the pressure cap in this utility model;

[0031] Figure 3 This is a schematic diagram of the packing mechanism in this utility model;

[0032] Figure 4 This is a schematic diagram showing the positional relationship between the connecting shell and the packing seal in this utility model;

[0033] Figure 5 This is a schematic diagram showing the positional relationship between the packing seal and the connecting plate in this utility model;

[0034] Figure 6 This is a schematic diagram of the load-bearing mechanism in this utility model.

[0035] In the diagram: 100, valve cover; 101, threaded groove; 102, stuffing box; 103, arc groove; 104, limiting groove; 110, gland; 120, fixing bolt; 200, packing mechanism; 210, packing gasket; 220, connecting shell; 221, guide groove; 230, packing seal; 240, connecting plate; 241, guide block; 250, V-shaped spring; 260, annular shell; 261, sliding shell; 270, compression spring; 300, bearing mechanism; 310, bearing shell; 320, arc plate; 321, limiting block; 330, arc shell; 340, baffle; 341, push block. Detailed Implementation

[0036] 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.

[0037] Example 1

[0038] Please see Figure 1-6 In this embodiment of the utility model, a double-layer packing sealing and tightening anti-loosening device includes: a valve cover 100, a packing mechanism 200, and a bearing mechanism 300. The valve cover 100 has two threaded grooves 101, a stuffing box 102, an arc groove 103, and two limiting grooves 104. A pressure cap 110 is provided on the valve cover 100. Both ends of the pressure cap 110 are screwed with fixing bolts 120, and one end of each fixing bolt 120 is screwed with the corresponding threaded groove 101. The packing mechanism 200 is located inside the stuffing box 102, and the bearing mechanism 300 is located outside the packing mechanism 200.

[0039] Specifically, the gland 110 is fixed to the valve cover 100 by screwing the fixing bolt 120 and the threaded groove 101 together. After fixing, the gland 110 squeezes the packing mechanism 200, thereby tightening the packing mechanism 200 to prevent loosening. The packing mechanism 200 can effectively prevent the medium inside the valve from leaking into the external environment through the gap between the valve stem and the valve body, ensuring the performance of the packing mechanism 200. The bearing mechanism 300 makes it easy to remove the entire packing mechanism 200, which facilitates quick replacement of the packing mechanism 200.

[0040] like Figure 3-5As shown, in this embodiment, the packing mechanism 200 includes: a packing pad 210 and two packing seals 230. The packing pad 210 is disposed inside the stuffing box 102, and the two packing seals 230 are respectively disposed at the top and bottom of the packing pad 210. Compensation components are provided on the outer sides of both packing seals 230, and anti-loosening components are also provided on the outer sides of both packing seals 230. The compensation components include: a connecting shell 220, multiple connecting plates 240, and multiple V-shaped springs 250. The top and bottom of the connecting shell 220 are bonded and fixed to the corresponding packing seals 230. Multiple guide grooves 221 are formed on the inner sidewall of the connecting shell 220, and the multiple connecting plates 240 are all located within the connecting shell 220. Inside, one end of each of the multiple connecting plates 240 is bonded and fixed to the packing seal 230, one end of each of the multiple V-shaped springs 250 is fixed to the inner wall of the connecting shell 220, and the other end of each of the multiple V-shaped springs 250 is fixed to the corresponding connecting plate 240. The anti-loosening component includes: an annular shell 260 and a compression spring 270. The annular shell 260 is disposed on the outside of the connecting shell 220. A sliding shell 261 is slidably connected inside the annular shell 260, and the sliding shell 261 is bonded and fixed to the corresponding packing seal 230. The compression spring 270 is disposed inside the annular shell 260 and the sliding shell 261, and both ends of the compression spring 270 are fixed to the inner walls of the annular shell 260 and the sliding shell 261, respectively.

[0041] In this embodiment, when the gland 110 moves downward, the bottom of the gland 110 presses against the top annular shell 260, causing the two compression springs 270 to compress and contract. The compressed springs 270 then push the sliding shell 261 to press against the packing seal 230, thus securing the two packing seals 230. Furthermore, multiple V-shaped springs 250 push multiple connecting plates 240 to press against the packing seal 230, ensuring the tightness of the connection between the packing seal 230 and the valve stem. Therefore, the two packing seals 230 can effectively prevent... The system prevents the internal medium of the valve from leaking into the external environment through the gap between the valve stem and the valve body. The two packing seals 230 provide double protection. When the packing seal 230 wears during use, multiple V-shaped springs 250 push multiple connecting plates 240 to move, causing the packing seal 230 to deform. The two compression springs 270 also push the sliding shell 261 to squeeze the packing seal 230, causing the packing seal 230 to deform. This automatically compensates for the wear of the packing seal 230, thus ensuring the sealing effect of the packing mechanism 200 during use.

[0042] like Figure 5 As shown, in this embodiment, guide blocks 241 are fixedly connected to the top and bottom of the connecting plate 240, and the guide blocks 241 are slidably connected to the corresponding guide grooves 221.

[0043] In practice, the guide block 241 and the guide groove 221 are used together to limit the position and movement direction of the connecting plate 240.

[0044] Example 2

[0045] Based on Embodiment 1, in order to facilitate the removal of the packing mechanism 200 as a whole, thereby facilitating the replacement or maintenance of the packing mechanism 200.

[0046] like Figure 6 As shown, in this embodiment, the supporting mechanism 300 includes: a supporting shell 310 and two arc-shaped plates 320. The supporting shell 310 is slidably inserted into the stuffing box 102. The supporting shell 310 is disposed on the outside of the stuffing mechanism 200. A limit component is provided on the top of the supporting shell 310. The two arc-shaped plates 320 are fixedly connected to the top of the outer wall of the supporting shell 310. The bottom of the two arc-shaped plates 320 contacts the inner bottom surface of the arc-shaped groove 103. The bottom of the two arc-shaped plates 320 is fixedly connected to the top of the outer wall of the supporting shell 310. The limiting component includes two arc-shaped shells 330 and two baffles 340. The two arc-shaped shells 330 are fixedly connected to the inner sidewall of the arc-shaped groove 103. The two baffles 340 are slidably connected to the interior of the two arc-shaped shells 330. The bottom of the two baffles 340 contacts the top of the corresponding arc-shaped plate 320. A push block 341 is fixedly connected to one end of each of the two baffles 340.

[0047] In practice, the bearing shell 310 is used to support the packing mechanism 200. When the packing mechanism 200 needs to be removed, the pressure cap 110 is disassembled and the two push blocks 341 are pushed to move the two baffles 340 into the interior of the two arc-shaped shells 330. The two push blocks 341 do not contact the corresponding arc-shaped plates 320. The bearing shell 310 is then pulled out, making it easy to quickly remove the packing mechanism 200 as a whole. This facilitates the replacement or maintenance of the packing mechanism 200, and no tools are needed for removal, making it more convenient to use.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-layer packing seal tightening and anti-loosening device, characterized in that, include: A valve cover (100) is provided with two threaded grooves (101), a stuffing box (102), an arc groove (103) and two limiting grooves (104). A pressure cap (110) is provided on the valve cover (100). Both ends of the pressure cap (110) are screwed together with fixing bolts (120), and one end of each fixing bolt (120) is screwed together with the corresponding threaded groove (101). A packing mechanism (200) is disposed inside the stuffing box (102); The support mechanism (300) is located on the outside of the packing mechanism (200).

2. The double-layer packing sealing and tightening anti-loosening device according to claim 1, characterized in that, The packing mechanism (200) includes: A packing pad (210) is disposed inside the stuffing box (102); Two packing seals (230) are respectively disposed at the top and bottom of the packing pad (210). Compensation components are provided on the outer side of both packing seals (230), and anti-loosening components are provided on the outer side of both packing seals (230).

3. The double-layer packing sealing and tightening anti-loosening device according to claim 2, characterized in that, The compensation component includes: The connecting shell (220) is bonded and fixed to the top and bottom of the corresponding packing seal (230), and the inner sidewall of the connecting shell (220) is provided with a plurality of guide grooves (221); Multiple connecting plates (240) are located inside the connecting shell (220), and one end of each of the multiple connecting plates (240) is bonded and fixed to the packing seal (230); Multiple V-shaped spring pieces (250) are fixed at one end to the inner wall of the connecting shell (220), and the other end of the multiple V-shaped spring pieces (250) are fixed to the corresponding connecting plates (240).

4. The double-layer packing sealing and tightening anti-loosening device according to claim 3, characterized in that, The top and bottom of the connecting plate (240) are both fixedly connected to guide blocks (241), and the guide blocks (241) are slidably connected to the corresponding guide grooves (221).

5. The double-layer packing seal tightening and anti-loosening device according to any one of claims 2-4, characterized in that, The anti-loosening component includes: An annular shell (260) is disposed on the outside of the connecting shell (220). A sliding shell (261) is slidably connected inside the annular shell (260), and the sliding shell (261) is bonded and fixed to the corresponding packing seal (230). A compression spring (270) is disposed inside the annular shell (260) and the sliding shell (261), and the two ends of the compression spring (270) are fixedly connected to the inner sidewalls of the annular shell (260) and the sliding shell (261), respectively.

6. The double-layer packing sealing and tightening anti-loosening device according to claim 1, characterized in that, The bearing mechanism (300) includes: The support shell (310) is slidably inserted into the stuffing box (102), the support shell (310) is disposed on the outside of the stuffing mechanism (200), and a limit component is provided on the top of the support shell (310); Two arc-shaped plates (320) are fixedly connected to the top of the outer wall of the bearing shell (310). The bottom of the two arc-shaped plates (320) is in contact with the bottom surface of the arc-shaped groove (103). The bottom of the two arc-shaped plates (320) is fixedly connected to a limiting block (321), and the two limiting blocks (321) are respectively inserted into the corresponding limiting groove (104).

7. The double-layer packing seal tightening and anti-loosening device according to claim 6, characterized in that, The limiting component includes: Both arc-shaped shells (330) are fixedly connected to the inner wall of the arc-shaped groove (103); Two baffles (340) are slidably connected to the interior of the two arc-shaped shells (330), and the bottom of the two baffles (340) respectively contacts the top of the corresponding arc-shaped plate (320), and a push block (341) is fixedly connected to one end of each baffle (340).

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