A packing gland device for a stop valve

Abstract

The utility model provides a kind of stop valve stuffing box pressing device, it is related to stop valve sealing stuffing box technical field. Including bonnet, the upper portion sliding connection of bonnet is connected with compaction pedestal, the lower portion sliding connection of compaction pedestal is connected with sealing packing, the surface of sealing packing is slidingly connected with bonnet, the upper portion rotationally connected with screw rod of bonnet, the surface screw thread connection of screw rod is connected with locating ring, the surface of screw rod is slidingly connected with compaction pedestal, the lower end of locating ring is slidingly connected with compaction pedestal, the surface fixedly connected with protruding tooth of locating ring, the upper end rotationally connected with gear ring of compaction pedestal, the inner wall of gear ring is engaged with protruding tooth. By gear ring rotation simultaneously drive locating ring rotation, make it under the guidance of screw rod, from both ends simultaneously press down compaction pedestal, so that sealing packing is subjected to uniform pressure, so that the adhesion of sealing packing and valve stem and bonnet is higher, reduce the risk of valve leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing stuffing boxes for gate valves, specifically a gate valve stuffing box pressing device. Background Technology

[0002] As the core valve used to cut off and regulate the flow of media in industrial pipelines, the sealing performance of the gate valve directly determines the safety and stability of the pipeline system. The stuffing box is a key sealing component of the valve stem of the gate valve. It is located at the junction of the valve body and the valve cover, where the valve stem passes through. Its core function is to allow the valve stem to move up and down or rotate to open and close the valve, while preventing the medium in the pipe from leaking outward along the gap between the valve stem and the valve body.

[0003] According to the publicly available announcement (CN212338218U), a vertical pipeline anti-erosion shut-off valve is disclosed. This technology discloses that it includes a shut-off valve body and a valve core. The valve body is mounted on the shut-off valve body, and a centripetal fluid seat is mounted on the upper end of the valve body. A valve seat is disposed above the centripetal fluid seat, and a valve core is mounted on the top of the valve seat. Valve covers are disposed on both sides of the upper part of the valve core, and a valve stem guide groove is mounted above the valve core. An energy storage disc spring is disposed at the rear end of the valve stem guide groove. The energy storage disc spring is equipped with an energy storage coupling on one side of its upper end. The bottom of the valve seat is provided with a valve seat sealing surface, and the lower end of the valve seat sealing surface is provided with a valve core window adjustment surface. The valve core window adjustment surface is connected to the centripetal fluid seat. These technical solutions have the advantages of effectively ensuring the concentricity of the lower valve stem, valve seat, and stuffing box by setting the energy storage coupling. At the same time, the angle between the valve stem and the vertical pipe is 50 degrees during installation, which greatly improves the force on the drive device relative to the valve body and has good application prospects.

[0004] However, in the aforementioned comparative documents, after the sealing packing is inserted, the base is compacted by individually squeezing it with nuts at both ends. As a result, when the pressure is applied, the two ends of the sealing packing cannot be subjected to force simultaneously and the force is different, leading to uneven force distribution. This can easily cause excessive deformation of the sealing packing, reduce the fit between the surface and the valve stem and valve cover, and increase the risk of valve leakage.

[0005] Therefore, this utility model provides a sealing valve stuffing box clamping device. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies and provide a sealing valve stuffing box clamping device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a stop valve stuffing box clamping device, comprising a valve cover, a compaction base slidably connected to the upper part of the valve cover, a sealing packing slidably connected to the lower part of the compaction base, the surface of the sealing packing slidably connected to the valve cover, a screw rotatably connected to the upper part of the valve cover, a positioning ring threadedly connected to the surface of the screw, the surface of the screw slidably connected to the compaction base, the lower end of the positioning ring slidably connected to the compaction base, a protruding tooth fixedly connected to the surface of the positioning ring, and a toothed ring rotatably connected to the upper end of the compaction base, the inner wall of the toothed ring meshing with the protruding tooth.

[0008] In a preferred embodiment, the upper end of the screw is provided with a guiding arc surface, and the surface of the toothed ring is provided with anti-slip texture.

[0009] The technical effect of adopting the above-mentioned further solution is that it simplifies the compaction operation and saves more effort.

[0010] In a preferred embodiment, the lower end of the valve cover is fixedly connected to the valve body by bolts, and the inner wall of the valve body is threadedly connected to the valve stem.

[0011] The technical effect of adopting the above-mentioned further solution is that the valve stem can rotate up and down inside the valve body.

[0012] In a preferred embodiment, a handwheel is fixedly connected to the upper end of the valve stem, a valve disc is fixedly connected to the lower end of the valve stem, and a sealing seat ring is fixedly connected to the surface of the valve disc.

[0013] The technical effect of adopting the above-mentioned further solution is that the valve can achieve basic functions by setting it up.

[0014] In a preferred embodiment, the surface of the compaction base is provided with a positioning mechanism, which includes a positioning rod, a handle, a spring, a top plate, a fixing rod, a slot, and an arc head.

[0015] The technical effect of adopting the above-mentioned further solution is that it avoids a decrease in the fit between the sealing packing and the valve stem and valve cover.

[0016] In a preferred embodiment, the surface of the positioning rod is threadedly connected to the compaction base, the upper end of the handle is fixedly connected to the positioning rod, the fixed end of the spring is fixedly connected to the positioning rod, the upper end of the spring is fixedly connected to the top plate, and the lower end of the fixing rod is rotatably connected to the top plate.

[0017] The technical effect of adopting the above-mentioned further solution is that the fixing rod can be raised and lowered within the compaction base.

[0018] In a preferred embodiment, the slot is located at the lower end of the toothed ring, the lower end of the arc head is fixedly connected to the fixing rod, and the surface of the arc head is slidably connected to the toothed ring through the slot.

[0019] The technical effect of adopting the above-mentioned further solution is that by setting it so that when the toothed ring rotates, it can provide feedback when the arc head and the slot are aligned, thereby better aligning and positioning the toothed ring at an angle.

[0020] This utility model provides a packing gland clamping device for a gate valve. It has the following beneficial effects:

[0021] The rotation of the gear ring simultaneously drives the rotation of the positioning ring, which, guided by the screw, presses down on the compaction base from both ends. This ensures that the sealing packing is subjected to uniform pressure, resulting in a higher fit between the sealing packing and the valve stem and valve cover, thus reducing the risk of valve leakage.

[0022] The positioning rod positions the toothed ring after the sealing packing is compacted, preventing the contact points between the sealing packing and the valve stem and valve cover from becoming loose, which would reduce the fit and further reduce the risk of valve leakage. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a stop valve stuffing box clamping device provided by this utility model;

[0024] Figure 2 A schematic diagram of the valve disc and related structures of a gate valve stuffing box clamping device provided by this utility model;

[0025] Figure 3 A schematic diagram of the protruding teeth and related structures of a gate valve stuffing box clamping device provided by this utility model;

[0026] Figure 4 This utility model provides a gate valve stuffing box clamping device. Figure 3 Enlarged structural diagram at point A in the middle.

[0027] Legend:

[0028] 1. Valve cover; 2. Compacting base; 3. Sealing packing; 4. Screw; 5. Locating ring; 6. Protruding teeth; 7. Toothed ring; 8. Guide arc surface; 9. Anti-slip texture; 10. Valve body; 11. Valve stem; 12. Handwheel; 13. Valve disc; 14. Sealing seat ring; 15. Locating rod; 16. Handle; 17. Spring; 18. Top plate; 19. Fixing rod; 20. Slot; 21. Arc head. Detailed Implementation

[0029] 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.

[0030] like Figure 1 - Figure 4 As shown, this embodiment provides a technical solution: a gate valve stuffing box clamping device, including a valve cover 1, a compaction base 2 slidably connected to the upper part of the valve cover 1, the inner circumference of the valve cover 1 being equal to the outer circumference of the compaction base 2, a sealing packing 3 slidably connected to the lower part of the compaction base 2, the surface of the sealing packing 3 being slidably connected to the valve cover 1, the sealing packing 3 being adapted to the valve cover 1, and a screw 4 rotatably connected to the upper part of the valve cover 1, two screws 4 being provided, a positioning ring 5 being threadedly connected to the surface of the screw 4, the screw 4 being adapted to the positioning ring 5, and the surface of the screw 4 being slidably connected to the compaction base 2. Then, the screw 4 is adapted to the compaction base 2, the lower end of the positioning ring 5 is slidably connected to the compaction base 2, the surface of the positioning ring 5 is fixedly connected with the protruding teeth 6, and the upper end of the compaction base 2 is rotatably connected with the toothed ring 7. The inner wall of the toothed ring 7 meshes with the protruding teeth 6. The toothed ring 7 and the protruding teeth 6 are adapted to each other. The rotation of the toothed ring 7 drives the positioning ring 5 to rotate at the same time, so that under the guidance of the screw 4, it presses down on the compaction base 2 from both ends at the same time. Therefore, the sealing packing 3 is subjected to uniform pressure, so that the sealing packing 3 fits the valve stem 11 and the valve cover 1 better, reducing the risk of valve leakage.

[0031] like Figure 1 - Figure 3 As shown: The upper end of the screw 4 is provided with a guide arc surface 8, and the surface of the toothed ring 7 is provided with anti-slip texture 9. The positioning ring 5 can be quickly put onto the screw 4 through the valve stem 11. The anti-slip texture 9 increases the friction, making the rotation of the toothed ring 7 more effortless.

[0032] like Figure 1 - Figure 2 As shown: The lower end of the valve cover 1 is fixedly connected to the valve body 10 by bolts. The valve stem 11 is threadedly connected to the inner wall of the valve body 10. The valve body 10 and the valve stem 11 are compatible. When the valve stem 11 rotates, it can move up and down inside the valve body 10.

[0033] like Figure 1 - Figure 2 As shown: A handwheel 12 is fixedly connected to the upper end of the valve stem 11, and a valve disc 13 is fixedly connected to the lower end of the valve stem 11. A sealing seat ring 14 is fixedly connected to the surface of the valve disc 13. When the handwheel 12 rotates, it drives the valve stem 11 to rotate, thereby causing the valve disc 13 to press down and achieve the opening and closing effect of the valve.

[0034] like Figure 3 - Figure 4 As shown: The surface of the compaction base 2 is provided with a positioning mechanism, which includes a positioning rod 15, a handle 16, a spring 17, a top plate 18, a fixing rod 19, a slot 20 and an arc head 21. By setting it up, the angle of the toothed ring 7 is fixed after assisting in compacting the sealing packing 3, so as to avoid the decrease in the fit between the sealing packing 3 and the valve stem 11 and the valve cover 1.

[0035] like Figure 3 - Figure 4 As shown: the surface of the positioning rod 15 is threadedly connected to the compaction base 2, and the positioning rod 15 is adapted to the compaction base 2. The upper end of the handle 16 is fixedly connected to the positioning rod 15. The fixed end of the spring 17 is fixedly connected to the positioning rod 15. The upper end of the spring 17 is fixedly connected to the top plate 18, so that the top plate 18 loses pressure and is pushed upward by the spring 17. The lower end of the fixing rod 19 is rotatably connected to the top plate 18. The fixing rod 19 is adapted to the top plate 18. The outer circumference of the fixing rod 19 is smaller than the outer circumference of the top plate 18, so that the top plate 18 will be blocked by the compaction base 2 after moving upward a certain distance. When the handle 16 is rotated, it drives the positioning rod 15 to rotate, and the positioning rod 15 pushes the spring 17 to move up and down in the compaction base 2. When the spring 17 pushes the top plate 18 to move up and down, it drives the fixing rod 19 to move up and down, and stops when the top plate 18 moves upward and contacts the upper end of the compaction base 2.

[0036] like Figure 3 - Figure 4 As shown: Slots 20 are provided at the lower end of the toothed ring 7. Several slots 20 are provided. The lower end of the arc head 21 is fixedly connected to the fixing rod 19. The surface of the arc head 21 is slidably connected to the toothed ring 7 through the slots 20. The arc head 21 is adapted to the toothed ring 7. When the toothed ring 7 rotates, the toothed ring 7 squeezes the arc head 21 to move it downward and compress the spring 17. When the arc head 21 is aligned with the slot 20, the spring 17 pushes the arc head 21 upward, thereby providing feedback when the arc head 21 is aligned with the slot 20. At this time, the handle 16 is rotated to insert the fixing rod 19 into the slot 20 to position the angle of the toothed ring 7.

[0037] Working principle:

[0038] like Figure 1 - Figure 4 As shown:

[0039] In use: The rotation of the gear ring 7 simultaneously drives the rotation of the positioning ring 5, which, guided by the screw 4, presses down on the compaction base 2 from both ends. This ensures that the sealing packing 3 receives uniform pressure, resulting in a better fit between the sealing packing 3 and the valve stem 11 and valve cover 1, reducing the risk of valve leakage. When the gear ring 7 rotates, it squeezes the arc head 21, causing it to move downwards and compress the spring 17. When the arc head 21 aligns with the slot 20, the spring 17 pushes the arc head 21 upwards, providing feedback when the arc head 21 is aligned with the slot 20. When the gear ring 7 completes its rotation, compaction is achieved. When the base 2 finishes pressing, the slot 20 is aligned with the arc head 21. At this time, the handle 16 is turned, which drives the positioning rod 15 to rotate. The positioning rod 15 pushes the spring 17 to move up and down in the compaction base 2. When the spring 17 pushes the top plate 18 to move up and down, it drives the fixing rod 19 to move up and down. The top plate 18 stops when it moves up to the upper end and contacts the compaction base 2. This completes the positioning of the angle of the toothed ring 7, preventing the contact points between the sealing packing 3 and the valve stem 11 and valve cover 1 from loosening, which would reduce the fit and further reduce the risk of valve leakage.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model 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 basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] 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 stop valve stuffing box clamping device, comprising a valve cover (1), characterized in that, The upper part of the valve cover (1) is slidably connected to a compaction base (2), and the lower part of the compaction base (2) is slidably connected to a sealing packing (3). The surface of the sealing packing (3) is slidably connected to the valve cover (1). The upper part of the valve cover (1) is rotatably connected to a screw (4). The surface of the screw (4) is threadedly connected to a positioning ring (5). The surface of the screw (4) is slidably connected to the compaction base (2). The lower end of the positioning ring (5) is slidably connected to the compaction base (2). The surface of the positioning ring (5) is fixedly connected to a protruding tooth (6). The upper end of the compaction base (2) is rotatably connected to a toothed ring (7). The inner wall of the toothed ring (7) meshes with the protruding tooth (6).

2. The stop valve stuffing box clamping device according to claim 1, characterized in that: The upper end of the screw (4) is provided with a guide arc surface (8), and the surface of the toothed ring (7) is provided with anti-slip texture (9).

3. The stop valve stuffing box clamping device according to claim 1, characterized in that: The lower end of the valve cover (1) is fixedly connected to the valve body (10) by bolts, and the valve stem (11) is threadedly connected to the inner wall of the valve body (10).

4. The stop valve stuffing box clamping device according to claim 3, characterized in that: A handwheel (12) is fixedly connected to the upper end of the valve stem (11), and a valve disc (13) is fixedly connected to the lower end of the valve stem (11). A sealing seat ring (14) is fixedly connected to the surface of the valve disc (13).

5. The stop valve stuffing box clamping device according to claim 1, characterized in that: The compaction base (2) is provided with a positioning mechanism on its surface, which includes a positioning rod (15), a handle (16), a spring (17), a top plate (18), a fixing rod (19), a slot (20), and an arc head (21).

6. The stop valve stuffing box clamping device according to claim 5, characterized in that: The surface of the positioning rod (15) is threadedly connected to the compaction base (2), the upper end of the handle (16) is fixedly connected to the positioning rod (15), the fixed end of the spring (17) is fixedly connected to the positioning rod (15), the upper end of the spring (17) is fixedly connected to the top plate (18), and the lower end of the fixing rod (19) is rotatably connected to the top plate (18).

7. The stop valve stuffing box clamping device according to claim 5, characterized in that: The slot (20) is located at the lower end of the toothed ring (7), and the lower end of the arc head (21) is fixedly connected to the fixing rod (19). The surface of the arc head (21) is slidably connected to the toothed ring (7) through the slot (20).

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