A valve with an online refill structure

Abstract

The utility model discloses a valve with online replacement packing structure, including valve body, sphere and valve shaft, still be equipped with the valve cover on the valve body, still be equipped with the movable packing box on the valve cover, the valve shaft includes upper shaft, middle axle and lower shaft, the middle axle is connected on the sphere and is inserted into the valve body through the valve cover, is equipped with the retaining step on the middle axle, is equipped with the radial hole on the valve body still, also include the wedge type ring with the inclined plane, is equipped with the wedge type lock block, inner hexagonal T type screw and screw plug in the radial hole, the valve of the utility model, through setting up by the wedge type ring, the lock block and the retaining step cooperation of middle axle constitutes the retaining structure, and sets up the shaft coupling between the middle axle and the upper shaft, when carrying out packing box dismounting replacement, the ball, the middle valve shaft are kept in position, and the packing is replaced alone on line, and the replacement maintenance of packing is convenient.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve with an online packing replacement structure. Background Technology

[0002] Ball valves are among the most widely used valves. They are simple in structure, reliable in sealing, and easy to maintain. The sealing surface and the ball are usually in a closed state, making them less susceptible to erosion by the medium. They are widely used in petroleum, chemical, metallurgical, textile, food, nuclear energy, and aerospace industries. Ball valves have a 90° rotation operation. The plug body is a ball with a circular through-hole or channel along its axis. In pipelines, they are mainly used for shut-off, distribution, and changing the flow direction of the medium. They require only a 90° rotation and a very small torque to achieve a tight seal.

[0003] Existing ball valves typically consist of a valve body, valve seat, valve cover, ball, and valve stem. The ball is positioned within the valve body by machining two ball shafts at its upper and lower ends, with corresponding ball shaft holes machined in both the valve body and valve cover. Bearings connect the ball shafts and their holes, thus achieving the ball's positioning. Ball valves usually have sealing packing between the valve cover, valve stem, and gland. This packing typically uses soft sealing structures, such as O-rings, packing, lip seals, and combinations thereof. The packing under operating pressure requires periodic maintenance, necessitating the disassembly of the valve cover for packing replacement. Utility Model Content

[0004] In view of the prior art, the purpose of this utility model is to provide a valve with an online packing replacement and maintenance structure, which allows operators to maintain and replace the valve packing online.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a valve with an online packing replacement structure, including a valve body, a ball, and a valve shaft. The valve body is also provided with a valve cover, and the valve cover is also provided with a movable packing gland. The valve shaft includes an upper shaft, a middle shaft, and a lower shaft. The middle shaft passes through the valve cover, extends into the valve body, and is connected to the ball. The middle shaft is provided with a retaining step. The valve body is provided with a radial hole and also includes a wedge-shaped ring with an inclined surface. The radial hole is provided with a wedge-shaped locking block, an internal hexagonal T-screw, and a screw plug.

[0006] As a further feature of the above scheme, the radial hole is provided with internal threads, and the internal hexagonal T-screw and the plug are provided with corresponding external threads.

[0007] As a further feature of the above scheme, the front end of the wedge-shaped locking block is provided with a wedge-shaped surface, which abuts against the inclined surface of the wedge-shaped ring.

[0008] As a further feature of the above solution, the movable stuffing box includes a stuffing ring, a stuffing pad ring, a stuffing sleeve, a stuffing gland, and gland bolts.

[0009] As a further provision of the above scheme, a coupling is provided between the upper shaft and the middle shaft, and the middle shaft and the lower shaft are connected to a ball.

[0010] As a further feature of the above scheme, a bracket is bolted to the valve cover, and an actuator is provided on the bracket. The output shaft of the actuator is connected to an upper shaft, and the lower end of the upper shaft extends into a coupling.

[0011] As a further feature of the above solution, the valve body is provided with a bottom cover relative to the lower shaft.

[0012] Beneficial effects: The valve of this utility model has a retaining structure consisting of a wedge-shaped ring, a locking block and a retaining step on the central shaft. A coupling is installed between the central shaft and the upper shaft. When the stuffing box is disassembled and replaced, the ball and the central valve shaft are limited and retained. The packing can be replaced online separately, which facilitates the replacement and maintenance of the packing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the valve structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the disassembly and retention structure in this embodiment.

[0015] Reference numerals: 1. Valve body; 2. Ball; 3. Valve shaft; 31. Retaining step; 32. Radial hole; 321. Internal thread; 322. External thread; 34. Inclined surface; 35. Upper shaft; 36. Middle shaft; 37. Lower shaft; 38. Bottom cover; 4. Movable stuffing box; 5. Packing gasket ring; 6. Packing ring; 8. Packing gland; 9. Packing gland; 10. Gland bolt; 11. Coupling; 15. Bracket; 16. Actuator; 17. Wedge ring; 18. Wedge locking block; 181. Wedge face; 19. Hexagonal T-screw; 20. Plug; 22. Valve cover. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0017] like Figure 1-2The valve shown includes a valve body 1, a ball 2, and a valve shaft 3. The valve body 1 is also provided with a valve cover 22, and the valve cover 22 is also provided with a movable stuffing box 4. The valve shaft 3 includes an upper shaft 35, a middle shaft 36, and a lower shaft 37. The middle shaft 36 passes through the valve cover 22, extends into the valve body 1, and is connected to the ball 2. The middle shaft 36 is provided with a retaining step 31. The valve body 1 is provided with a radial hole 32 and also includes a wedge-shaped ring 17 with an inclined surface 34. The radial hole 32 is provided with a wedge-shaped locking block 18, an internal hexagon T-screw 19, and a screw plug 20.

[0018] As a further provision of the above scheme, the radial hole 32 is provided with an internal thread 321, and the internal hexagon T-screw 19 and the plug 20 are provided with corresponding external threads 322.

[0019] As a further provision of the above scheme, the front end of the wedge-shaped locking block 18 is provided with a wedge-shaped surface 181, which abuts against the inclined surface 34 of the wedge-shaped ring 17.

[0020] As a further feature of the above scheme, the movable stuffing box 4 includes a stuffing ring 6, a stuffing pad ring 5, a stuffing sleeve 8, a stuffing gland 9, and a gland bolt 10.

[0021] As a further provision of the above scheme, a coupling 11 is provided between the upper shaft 35 and the middle shaft 36, the middle shaft 36 and the lower shaft 37 are connected to the ball 2, a bracket 15 is bolted to the valve cover 22, an actuator 16 is provided on the bracket 15, the output shaft of the actuator 16 is connected to the upper shaft 35, the lower end of the upper shaft 35 extends into the coupling 11, and the valve body 1 is provided with a bottom cover 38 opposite to the lower shaft 37.

[0022] refer to Figure 1 and Figure 2The valve of this utility model, as shown in this embodiment, allows for online packing replacement by operators, facilitating maintenance. Compared to existing solutions, this embodiment separates the valve shaft 3 between the ball 2 and the actuator 16, and connects them via a coupling 11. When the movable stuffing box 4 needs replacement, operators only need to disconnect the coupling 11 to create a gap between the upper shaft 35 and the middle shaft 36. Subsequently, by releasing the cover bolts 10 of the bracket 15 and the packing cover 9, the packing sleeve 8, packing ring 6, and packing pad ring 5 can be disassembled. During this process, the wedge-shaped surface 181 of the wedge-shaped locking block 18 in the radial hole 32 engages with the inclined surface 34 of the wedge-shaped ring 17, pressing the wedge-shaped ring 17 onto the retaining step 31 of the middle shaft 36, thereby limiting the movement of the middle shaft 36 and preventing it from moving upwards. This ensures that the disassembly of the movable stuffing box 4 does not affect the ball 2 or other components inside the valve, achieving online replacement without affecting the valve's operation during maintenance of the sealing packing structure.

[0023] Furthermore, such as Figure 1 As shown, the retaining structure of this embodiment uses an internal hexagon T-screw 19 to push the wedge-shaped locking block 18 to extend and retract radially relative to the central shaft 36. In use, the external thread 322 of the internal hexagon T-screw 19 engages with the internal thread 321 in the radial hole 32. In use, the screw plug 20 used to seal the radial hole 32 is unscrewed by threading, and then a hexagonal screwdriver is inserted to drive the internal hexagon T-screw 19 to rotate relative to the wedge-shaped locking block 18. The T-shaped head at the front end of the internal hexagon T-screw 19 rotates and locks in the wedge-shaped locking block 18. The threaded engagement drives the internal hexagon T-screw 19 to extend and retract relative to the radial hole 32. Through the action of the wedge-shaped locking block 18, the strength of pushing the wedge-shaped ring 17 downward to press the central shaft 36 is adjusted, and the friction between the wedge-shaped ring 17 and the central shaft 36 is adjusted.

[0024] 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 this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A valve with an online packing replacement structure, comprising a valve body (1), a ball (2), and a valve shaft (3), characterized in that: The valve body (1) is also provided with a valve cover (22), and the valve cover (22) is also provided with a movable stuffing box (4). The valve shaft (3) includes an upper shaft (35), a middle shaft (36) and a lower shaft (37). The middle shaft (36) passes through the valve cover (22) and extends into the valve body (1) and is connected to the ball (2). The middle shaft (36) is provided with a retaining step (31). The valve body (1) is provided with a radial hole (32) and also includes a wedge-shaped ring (17) with a bevel (34). The radial hole (32) is provided with a wedge-shaped locking block (18), an internal hexagonal T-screw (19) and a screw plug (20).

2. The valve with an online packing replacement structure according to claim 1, characterized in that: The radial hole (32) is provided with an internal thread (321), and the internal hexagon T-screw (19) and the plug (20) are provided with corresponding external threads (322).

3. A valve with an online packing replacement structure according to claim 1, characterized in that: The wedge-shaped locking block (18) has a wedge-shaped surface (181) at its front end, and the wedge-shaped surface (181) is set to abut against the inclined surface (34) of the wedge-shaped ring (17).

4. A valve with an online packing replacement structure according to claim 1, characterized in that: The movable stuffing box (4) includes a stuffing ring (6), a stuffing pad ring (5), a stuffing sleeve (8), a stuffing gland (9), and a gland bolt (10).

5. A valve with an online packing replacement structure according to claim 1, characterized in that: A coupling (11) is provided between the upper shaft (35) and the middle shaft (36), and the middle shaft (36) and the lower shaft (37) are connected to the ball (2).

6. A valve with an online packing replacement structure according to claim 5, characterized in that: The valve cover (22) is also bolted with a bracket (15), and the bracket (15) is provided with an actuator (16). The output shaft of the actuator (16) is connected to the upper shaft (35), and the lower end of the upper shaft (35) extends into the coupling (11).

7. A valve with an online packing replacement structure according to claim 1, characterized in that: The valve body (1) is provided with a bottom cover (38) relative to the lower shaft (37).

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