A valve with a seal structure that is easy to replace

Abstract

The utility model relates to a valve with sealing structure easy to replace belongs to valve maintenance technical field, the valve with sealing structure easy to replace, include: valve body, the top rotation of valve body is installed with hand wheel, sealing replacement mechanism is used for the convenient replacement of the sealing packing of valve and is set up between valve body and hand wheel telescopic sealing replacement mechanism, wherein, the sealing replacement mechanism includes the sealing seat fixed mounting at the outside of valve body and hand wheel, one side of sealing seat is provided with replacement subassembly, through replacement subassembly to the sealing packing in sealing seat direct ejection, spares the cumbersome operation of traditional tool layer by layer to hook, realizes the quick removal and replacement of packing, simplifies the process, reduces maintenance difficulty, promotes work efficiency, is applicable to frequently replaces or emergency overhaul. The sealing assembly is arranged at the top of the sealing seat, can effectively shield the sealing packing when the replacement mechanism works, prevents medium leakage, ensures valve sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of valve maintenance technology, and in particular to a valve with an easily replaceable sealing structure. Background Technology

[0002] A valve is a key mechanical component used to control the flow, shut off, regulate, or divert fluids in a pipeline system. It is widely used in industries such as petroleum, chemical, power, water supply, and HVAC. To ensure effective prevention of media leakage during valve opening, closing, or regulation, sealing packing is typically installed in critical areas such as the valve stem, valve body, and valve cover. This sealing packing is generally made of flexible graphite, polytetrafluoroethylene (PTFE), rubber, or composite materials, and is filled inside the valve's stuffing box. Pre-tightening force is applied through components such as a gland to achieve a seal between the valve stem and the external environment.

[0003] During long-term valve use, the sealing packing will experience a decline in sealing performance due to factors such as wear, aging, high temperature and pressure, or corrosion, requiring regular replacement and maintenance. Existing methods for replacing sealing packing generally suffer from cumbersome operations: after the packing rings are compacted and tightly fitted, traditional replacement requires the use of special tools such as hooks to remove the packing layer by layer, which is time-consuming and labor-intensive, and the operating space is limited, often resulting in packing residue that is difficult to completely remove and damage to the cavity wall. Utility Model Content

[0004] Therefore, it is necessary to address the issue that during long-term valve use, the sealing packing will experience a decline in sealing performance due to factors such as wear, aging, high temperature and pressure, or corrosion, requiring regular replacement and maintenance. Existing methods for replacing sealing packing generally suffer from cumbersome operations: the packing rings are tightly packed after being compacted, and traditional replacement requires the use of specialized tools such as hooks to remove the packing layer by layer, a time-consuming and labor-intensive process. Furthermore, the limited operating space often results in problems such as packing residue that is difficult to completely remove and damage to the cavity wall. To address this, a valve with an easily replaceable sealing structure is provided. This valve includes: a valve body with a handwheel rotatably mounted on its top; and a sealing replacement mechanism, a telescopic sealing replacement mechanism for convenient replacement of the valve's sealing packing, disposed between the valve body and the handwheel; wherein the sealing replacement mechanism includes a sealing seat fixedly installed on the outside of the valve body and the handwheel, a replacement component on one side of the sealing seat, and a sealing component on the top of the sealing seat.

[0005] The replacement component includes a movable tube slidably installed inside a sealing seat. A sealing groove is provided on the top of the sealing seat. One end of the movable tube extends into the interior of the sealing groove. A top plate is fixedly connected to one end of the movable tube in the sealing groove. The top plate is slidably connected to the sealing groove. Movable grooves are provided on both sides of the sealing seat. The adjacent side of the two movable grooves extends into one side of the movable tube. Two drive plates are fixedly installed on the surface of the movable tube. The two drive plates are respectively located inside the two movable grooves, and the opposite side of the two drive plates extends out of the movable groove.

[0006] A sealing tube is slidably connected to the outside of the sealing seat. The sealing tube is sleeved on the outside of the two movable grooves, and the two drive plates on opposite sides are located on the outside of the sealing tube.

[0007] Two branch pipes are fixedly installed on the surface of the valve body. One end of each branch pipe is slidably connected to an impact rod. The two impact rods are located at the bottom of the two drive plates respectively. A spring is fixedly installed between the bottom end of the two impact rods and the inner wall of the branch pipe.

[0008] Both impact rods are fitted with the same drive ring on their outer sides, and the drive ring is fitted on the outer side of the sealing seat.

[0009] A lever is fixedly installed on one side of the drive ring, and the lever is set in an arc shape.

[0010] The sealing assembly includes two screws fixedly installed on the top of the sealing seat. A sealing cover is slidably installed on the surface of the handwheel. Mounting plates are fixedly installed on both sides of the sealing cover. The two screws pass through the two mounting plates respectively. A connecting ring is rotatably installed on the top of each of the two mounting plates. The two connecting rings are connected to the corresponding screw threads. The sealing cover is located at the top of the sealing groove.

[0011] A sealing pressure plate is fixedly installed at the bottom of the sealing cover, and one side of the sealing pressure plate extends into the interior of the sealing groove.

[0012] Beneficial effects 1. The sealing packing inside the sealing seat is directly ejected by the replacement component, eliminating the tedious operation of traditional tools to remove it layer by layer. This enables rapid removal and replacement of the packing, simplifies the process, reduces maintenance difficulty, and improves work efficiency. It is suitable for frequent replacements or emergency repairs. The sealing component is located on top of the sealing seat and can effectively shield the sealing packing when the replacement mechanism is working, preventing media leakage and ensuring valve sealing reliability. 2. By connecting the two mounting plates to the corresponding screws with connecting rings, the sealing cover can be securely placed on top of the sealing groove, forming an effective sealing barrier. The connecting rings can be screwed on to adjust the vertical pressure of the sealing cover, ensuring that it remains in a close fit during long-term operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the sealing replacement mechanism of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the sealing seat of this utility model; Figure 4 This is a schematic diagram of the drive ring and impact rod structure of this utility model; Figure 5 This is a schematic diagram of the sealing component structure of this utility model.

[0015] Figure label: 100. Valve body; 200. Handwheel; 300. Seal replacement mechanism; 310. Seal seat; 311. Seal groove; 320. Replacement assembly; 321. Movable tube; 322. Ejector plate; 323. Movable groove; 324. Drive plate; 325. Seal tube; 326. Branch tube; 327. Impact rod; 328. Spring; 329. Drive ring; 3210. Paddle; 330. Seal assembly; 331. Screw; 332. Seal cover; 333. Mounting plate; 334. Connecting ring; 335. Seal pressure plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0017] The following is combined with Figures 1-5 This invention describes a valve with an easily replaceable sealing structure.

[0018] In one embodiment, a valve with an easily replaceable sealing structure includes: a valve body 100, with a handwheel 200 rotatably mounted on the top of the valve body 100; and a sealing replacement mechanism 300, a telescopic sealing replacement mechanism 300 for convenient replacement of the valve's sealing packing, disposed between the valve body 100 and the handwheel 200; wherein the sealing replacement mechanism 300 includes a sealing seat 310 fixedly installed on the outside of the valve body 100 and the handwheel 200, a replacement component 320 disposed on one side of the sealing seat 310, and a sealing component 330 disposed on the top of the sealing seat 310.

[0019] In this embodiment, the sealing packing inside the sealing seat 310 is directly ejected by the replacement component 320, eliminating the need for traditional hook tools to remove it layer by layer. This enables rapid and thorough removal and convenient replacement of the sealing packing, significantly simplifying the replacement process, reducing maintenance difficulty, and improving overall work efficiency. It is especially suitable for frequent replacements or emergency maintenance. The sealing component 330 is located on the top of the sealing seat 310 and shields and seals the sealing packing when the sealing replacement mechanism 300 is working normally, effectively preventing media leakage and ensuring the reliability of valve sealing. It should be noted that existing valves typically include basic components such as a valve body 100, valve cover, valve stem, sealing packing, handwheel 200, sealing gland, and related fastening and guiding assemblies. Replacement assembly 320 and sealing assembly 330 are additional structures arranged between the valve body 100 and the handwheel 200. Replacement assembly 320 is mainly used for convenient ejection and replacement of the sealing packing, while sealing assembly 330 is used for shielding and sealing the sealing packing. The structural design of these two components maintains physical independence from the valve's original opening, closing, regulating, and sealing functions. They intervene when replacing or maintaining the sealing packing, and do not interfere with the valve's main functions such as valve stem actuation, media flow, and valve core control during daily operation, thus not affecting the valve's normal opening and closing, sealing reliability, or overall structural stability.

[0020] like Figure 2 , Figure 3 and Figure 4 As shown, the replacement component 320 includes a movable tube 321 slidably installed inside the sealing seat 310. A sealing groove 311 is provided on the top of the sealing seat 310. One end of the movable tube 321 extends into the interior of the sealing groove 311. An ejector plate 322 is fixedly connected to one end of the movable tube 321 located in the sealing groove 311. The ejector plate 322 is slidably connected to the sealing groove 311. Movable grooves 323 are provided on both sides of the sealing seat 310. The adjacent side of the two movable grooves 323 extends into one side of the movable tube 321. Two drive plates 324 are fixedly installed on the surface of the movable tube 321. The two drive plates 324 are respectively located inside the two movable grooves 323, and the side of the two drive plates 324 that is far apart extends out of the movable grooves 323.

[0021] In this embodiment, the movable tube 321 can be driven by the drive plate 324 to slide along the sealing seat 310, thereby driving the ejector plate 322 to move upward synchronously, directly acting on the sealing packing in the sealing groove 311. This achieves rapid ejection of the entire or residual sealing packing, avoiding the cumbersome operation of repeatedly probing, pulling, and removing the sealing packing with tools such as hooks and spiral hooks in traditional replacement. This significantly reduces scratching and damage to the inner wall of the sealing groove 311, extending the service life of the sealing components. At the same time, the drive plate 324 achieves limiting guidance through the movable groove 323, ensuring that the ejection action of the movable tube 321 is smooth and orderly, and that the complete ejection of the sealing packing is not affected by skew or jamming. It should be noted that the sealing packing is a key component of the valve sealing structure. It is usually filled in the stuffing box or sealing groove 311 between the valve stem and the valve body 100. Its main function is to form a sealing barrier between the valve stem and the valve body 100 by compression, preventing the medium from leaking to the outside of the valve body 100 along the valve stem. Common sealing packings include graphite packing, polytetrafluoroethylene packing, asbestos rope packing, etc. These materials have good pressure resistance, temperature resistance and chemical stability, and are suitable for a variety of fluid control applications.

[0022] A sealing tube 325 is slidably connected to the outer side of the sealing seat 310. The sealing tube 325 is sleeved on the outer side of the two movable grooves 323, and the two drive plates 324 are located on the outer side of the sealing tube 325 on opposite sides.

[0023] In this embodiment, the sealing tube 325 is slidably sleeved on the outside of the two movable grooves 323, which can cover and shield the exposed part of the drive plate 324, preventing dust, water vapor or corrosive media from entering the interior of the movable grooves 323, thereby improving the protective performance and service life of the entire sealing replacement structure. The sliding connection of the sealing tube 325 ensures that the sealing tube 325 will not get stuck or interfere while the drive plate 324 pushes the movable tube 321 to perform up and down ejection, ensuring smooth structural operation and thus achieving an efficient and stable sealing filler ejection process.

[0024] Two branch pipes 326 are fixedly installed on the surface of the valve body 100. One end of each branch pipe 326 is slidably connected to an impact rod 327. The two impact rods 327 are located at the bottom of the two drive plates 324 respectively. A spring 328 is fixedly installed between the bottom end of the two impact rods 327 and the inner wall of the branch pipe 326.

[0025] In this embodiment, by continuously pressing down and releasing the impact rod 327, the impact rod 327 will periodically rebound under the action of the spring 328, thereby forming an intermittent impact force on the drive plate 324 located above it, which in turn drives the movable tube 321 to move upward, thereby realizing the rapid ejection of the sealing packing in the sealing groove 311.

[0026] The same drive ring 329 is fitted on the outer side of both impact rods 327, and the drive ring 329 is fitted on the outer side of the sealing seat 310.

[0027] In this embodiment, the driving ring 329 synchronously drives multiple impact rods 327, which can make two impact rods 327 move upward simultaneously under the same action, applying a uniform impact force to the two driving plates 324, thereby achieving a stable upward push of the movable tube 321 and improving the synchronicity and reliability of the ejection action.

[0028] A lever 3210 is fixedly installed on one side of the drive ring 329. The lever 3210 is set in an arc shape.

[0029] In this embodiment, the paddle 3210 provides a structural contact surface that facilitates the application of force. The paddle 3210 is designed in an arc shape to conform to the force trajectory when a finger or tool is pressed, which helps to achieve a smooth downward movement of the drive ring 329 in the vertical direction. During the downward movement of the drive ring 329, multiple impact rods 327 can be pressed down simultaneously, thereby pushing the springs 328 at their respective lower ends to compress and rebound, instantly impacting the drive plate 324 located above, driving the movable tube 321 to slide upward, and achieving rapid ejection of the sealing packing.

[0030] like Figure 2 , Figure 3 and Figure 5 As shown, the sealing assembly 330 includes two screws 331 fixedly installed on the top of the sealing seat 310, a sealing cover 332 slidably installed on the surface of the handwheel 200, and mounting plates 333 fixedly installed on both sides of the sealing cover 332. The two screws 331 pass through the two mounting plates 333 respectively, and a connecting ring 334 is rotatably installed on the top of the two mounting plates 333. The two connecting rings 334 are threaded to the corresponding screws 331. The sealing cover 332 is located on the top of the sealing groove 311.

[0031] In this embodiment, by connecting the two mounting plates 333 to the corresponding screws 331 with the connecting ring 334, the sealing cover 332 can be stably covered on the top of the sealing groove 311, forming an effective sealing barrier. The connecting ring 334 can achieve vertical pressing adjustment of the sealing cover 332 by thread engagement, ensuring that it remains in a close fit during long-term operation.

[0032] A sealing pressure plate 335 is fixedly installed at the bottom of the sealing cover 332, and one side of the sealing pressure plate 335 extends into the interior of the sealing groove 311.

[0033] In this embodiment, after the sealing cover 332 is tightened and positioned, the sealing pressure plate 335 generates a continuous pressing force on the sealing packing, thereby effectively enhancing the sealing performance and preventing leakage at the handwheel 200. As an internal sealing contact component, the sealing pressure plate 335 has good fit and rigidity, and can form a stable compaction on the packing after the ejection structure is reset, ensuring that the sealing effect of the valve is not affected by the ejection operation during long-term use.

[0034] Working Principle: During valve operation, the sealing packing fills the sealing groove 311 to form a sealing barrier between the valve stem and the valve body 100, preventing media leakage. If the sealing packing needs to be replaced, first loosen the connecting ring 334 in the sealing assembly 330, causing the sealing cover 332 and the sealing pressure plate 335 below it to lift, exposing the sealing groove 311. Then, the drive ring 329 is pressed downward by the paddle 3210, causing it to move vertically downward and press against the two impact rods 327. Under the action of the spring 328, the impact rods 327 generate an upward impact force, intermittently impacting the drive plate 324, which in turn pushes the movable tube 321 upward along the inside of the sealing seat 310, causing the ejector plate 322 to apply a pushing force to the sealing packing, achieving a rapid and complete ejection process. The movement of the drive plate 324 is restricted and guided within the movable groove 323 to avoid deflection and jamming. The sealing tube 325 is sleeved on the outside to form protection and prevent foreign objects from entering. After cleaning, new sealing packing can be refilled, and the connecting ring 334 can be screwed on, causing the sealing cover 332 to drive the sealing pressure plate 335 to press the packing tightly, restoring normal sealing function. The entire replacement process does not require disassembling the valve body; the actuating structure is physically separated from the valve opening and closing mechanism, ensuring convenient operation and reliable sealing.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A valve with an easily replaceable sealing structure, characterized in that, include: A valve body (100) is rotatably mounted on the top of the valve body (100). A telescopic seal replacement mechanism (300) for convenient replacement of the valve's sealing packing is located between the valve body (100) and the handwheel (200); The sealing replacement mechanism (300) includes a sealing seat (310) fixedly installed on the outside of the valve body (100) and the handwheel (200), a replacement component (320) is provided on one side of the sealing seat (310), and a sealing component (330) is provided on the top of the sealing seat (310).

2. The valve with an easily replaceable sealing structure according to claim 1, characterized in that, The replacement component (320) includes a movable tube (321) slidably installed inside a sealing seat (310). A sealing groove (311) is provided on the top of the sealing seat (310). One end of the movable tube (321) extends into the interior of the sealing groove (311). A top plate (322) is fixedly connected to one end of the movable tube (321) located in the sealing groove (311). The top plate (322) is slidably connected to the sealing groove (311). Movable grooves (323) are provided on both sides of the sealing seat (310). The adjacent side of the two movable grooves (323) extends into one side of the movable tube (321). Two drive plates (324) are fixedly installed on the surface of the movable tube (321). The two drive plates (324) are respectively located inside the two movable grooves (323), and the opposite side of the two drive plates (324) extends out of the movable grooves (323).

3. The valve with an easily replaceable sealing structure according to claim 2, characterized in that, A sealing tube (325) is slidably connected to the outside of the sealing seat (310). The sealing tube (325) is sleeved on the outside of the two movable grooves (323). The two drive plates (324) are located on the outside of the sealing tube (325) on opposite sides.

4. The valve with an easily replaceable sealing structure according to claim 2, characterized in that, Two branch pipes (326) are fixedly installed on the surface of the valve body (100). One end of each branch pipe (326) is slidably connected to an impact rod (327). The two impact rods (327) are located at the bottom of the two drive plates (324). A spring (328) is fixedly installed between the bottom end of the two impact rods (327) and the inner wall of the branch pipe (326).

5. The valve with an easily replaceable sealing structure according to claim 2, characterized in that, The same drive ring (329) is fitted on the outer side of both impact rods (327), and the drive ring (329) is fitted on the outer side of the sealing seat (310).

6. The valve with an easily replaceable sealing structure according to claim 5, characterized in that, A paddle (3210) is fixedly installed on one side of the drive ring (329), and the paddle (3210) is set in an arc shape.

7. The valve with an easily replaceable sealing structure according to claim 1, characterized in that, The sealing assembly (330) includes two screws (331) fixedly installed on the top of the sealing seat (310), a sealing cover (332) is slidably installed on the surface of the handwheel (200), and mounting plates (333) are fixedly installed on both sides of the sealing cover (332). The two screws (331) pass through the two mounting plates (333) respectively. A connecting ring (334) is rotatably installed on the top of the two mounting plates (333). The two connecting rings (334) are threaded to the corresponding screws (331). The sealing cover (332) is located at the top of the sealing groove (311).

8. The valve with an easily replaceable sealing structure according to claim 7, characterized in that, A sealing pressure plate (335) is fixedly installed at the bottom of the sealing cover (332), and one side of the sealing pressure plate (335) extends into the interior of the sealing groove (311).

Images