A sealed ball valve

Abstract

The utility model discloses a kind of sealed ball valves, including valve seat, connecting seat, valve stem connecting piece, valve stem, valve and locking cover, connecting seat is equipped with butt joint stud, sealing groove one and two, locking cover is equipped with adaptive hole and sealing groove three, three sealing grooves are all equipped with sealing ring, and valve stem connecting piece outer wall positioning groove guarantees sealing stability;Its assembly does not need complex welding and special equipment, complete by thread, buckle and adaptive groove, when maintaining, disassemble locking cover, take valve stem connecting piece can replace aging wear sealing ring, without disassembling complete machine;Valve stem or valve stem connecting piece is damaged, disassemble locking stud can be separated and replaced, avoid partial failure to replace complete machine, greatly reduce maintenance cost and downtime;And the T-shaped mobile installation groove of valve stem connecting piece is adapted with stopper T-shaped mobile block, limit stopper radial displacement, keep synchronous rotation, can also slide disassembly stopper, improve maintenance convenience.

Description

Technical Field

[0001] This utility model specifically relates to a well-sealed ball valve. Background Technology

[0002] Ball valves are among the most widely used shut-off valves in fluid transport systems. They achieve the flow and cut-off of media by rotating a ball with a through hole. Ball valves have advantages such as simple structure, low flow resistance, and rapid opening and closing, playing an important role in many fields such as petroleum, chemical, power, and municipal water supply. With the upgrading of industrial technology and the expansion of extreme working conditions, downstream markets are placing increasingly stringent requirements on the sealing reliability of ball valves. Especially in special scenarios such as high temperature, high pressure, ultra-low temperature, strong corrosion, or high vacuum, sealing performance has become a core indicator determining system safety and operating efficiency.

[0003] Traditional packed valve stem seals are prone to wear due to friction between the seal and the valve stem during frequent opening and closing, especially in highly corrosive media. This significantly increases the risk of seal failure, becoming one of the main hidden dangers of media leakage. Furthermore, most existing valve stem seals are integrated designs, requiring the entire valve body and stem to be disassembled and replaced when the seal is damaged. This cumbersome maintenance process leads to prolonged equipment downtime and disrupts production continuity.

[0004] Therefore, it is necessary to invent a well-sealed ball valve to solve the above problems. Utility Model Content

[0005] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a well-sealed ball valve.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a well-sealed ball valve, characterized in that: it includes a valve seat, a connecting seat is provided on the top of the valve seat, a valve stem connector is installed inside the connecting seat, a valve stem is installed on the top of the valve stem connector, and a valve is connected to the bottom of the valve, and the valve is disposed inside the valve seat; The connecting seat is also provided with a locking cover, which is located outside the valve stem connector; The bottom of the connecting seat leads to the interior of the valve seat. A docking stud extends from the top of the connecting seat. A through hole is provided in the middle of the docking stud. A sealing groove 1 is provided on the inner wall of the through hole. A sealing groove 2 is provided on the inner wall of the bottom of the connecting seat. A limit block extends from the side of the connecting seat. The locking cover is installed on the docking stud. The locking cover is provided with an adapter hole in the middle that matches the valve stem connector. A sealing groove 3 is provided on the inner wall of the adapter hole. Sealing rings are installed in the first, second and third sealing grooves. The outer wall of the valve stem connector is provided with a positioning groove that matches the sealing ring. The top of the valve stem connector is provided with an installation groove for installing the valve stem. A stop block that matches the limiting block is installed on one side of the top of the valve stem connector. The valve stem end is provided with a locking pin that matches the mounting groove.

[0007] Preferably, the valve stem connector has locking holes on both sides of the inner wall of the mounting groove at the top, the locking pin is fixed in the locking holes, the valve stem end extends downward to a docking seat, the docking seat is positioned in the mounting groove, and the docking seat has telescopic grooves on both sides for mounting the locking pin, and a locking spring is provided between the inside of the telescopic groove and the bottom of the locking pin.

[0008] Preferably, a limiting ring is provided at the opening of the telescopic groove, a limiting plate matching the limiting ring is provided at the bottom edge of the locking post, and the end of the locking post is hemispherical.

[0009] Preferably, the connecting seat is filled with a filler material located outside the valve stem connector.

[0010] Preferably, the valve stem connector has a movable mounting groove on one side of its top, and the stop block has a movable block on one side that matches the movable mounting groove. The movable block and the movable mounting groove have matching cross-sections and are both T-shaped. The stop block is L-shaped overall.

[0011] Preferably, the limiting block is provided with a limiting hook that matches the stop block on one side.

[0012] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: 1. The components of this utility model are assembled using threaded connections, snap-fit ​​engagement, and adapter groove positioning, eliminating the need for complex welding or specialized equipment. When the sealing ring ages or wears, the sealing ring can be replaced simply by removing the locking cover and taking out the valve stem connector, without disassembling the entire ball valve. If the valve stem or valve stem connector is damaged individually, the two can be separated by disassembling the locking pin, allowing for individual replacement of the damaged component. This avoids the need to replace the entire machine due to a partial fault, significantly reducing maintenance costs and downtime. 2. The T-shaped movable mounting groove on the top of the valve stem connector of this utility model is adapted to the T-shaped movable block of the stop, which can not only limit the radial displacement of the stop and ensure that the stop rotates synchronously with the valve stem connector, but also allow the stop to be directly slidably disassembled along the movable mounting groove when it is necessary to replace the stop, without damaging other structures, thus improving the convenience of maintenance operations. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the valve stem disassembled structure of this utility model; Figure 3 This is a schematic diagram of the disassembled locking cover structure of this utility model; Figure 4 This is a schematic diagram of the disassembled structure of the valve stem connector of this utility model; Figure 5 This is a schematic diagram of the locking post installation structure of this utility model; Figure 6 This is a schematic diagram of the connector of this utility model from another perspective.

[0015] Explanation of reference numerals in the attached figures: 1. Valve seat; 2. Connecting seat; 21. Docking stud; 22. Through hole; 23. Sealing groove one; 24. Sealing groove two; 25. Limiting block; 26. Limiting hook; 3. Valve stem connector; 31. Positioning groove; 32. Mounting groove; 33. Stop block; 34. Locking hole; 35. Moving mounting groove; 36. Moving block; 4. Valve stem; 41. Locking pin; 42. Docking seat; 43. Telescopic groove; 44. Locking spring; 45. Limiting ring; 46. Limiting plate; 5. Locking cover; 51. Adapter hole; 52. Sealing groove three; 6. Sealing ring. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-6 The ball valve shown is characterized in that it includes a valve seat 1, a connecting seat 2 is provided on the top of the valve seat 1, a valve stem connector 3 is installed inside the connecting seat 2, a valve stem 4 is installed on the top of the valve stem connector 3, and a valve is connected to the bottom of the valve, and the valve is located inside the valve seat 1. The connecting seat 2 is also provided with a locking cover 5, which is located outside the valve stem connecting piece 3; The bottom of the connecting seat 2 leads to the interior of the valve seat 1. The top of the connecting seat 2 extends with a mating stud 21. The middle of the mating stud 21 is provided with a through hole 22. The inner wall of the through hole 22 is provided with a sealing groove 23. The inner wall of the bottom of the connecting seat 2 is provided with a sealing groove 24. The side of the connecting seat 2 extends with a limit block 25. The locking cover 5 is installed on the mating stud 21. The middle of the locking cover 5 is provided with an adapter hole 51 for matching the valve stem connector 3. The inner wall of the adapter hole 51 is provided with a sealing groove 52. Sealing rings 6 are installed in sealing groove 1 23, sealing groove 24 and sealing groove 3 52. The outer wall of valve stem connector 3 is provided with positioning groove 31 matching sealing ring 6. The top of valve stem connector 3 is provided with mounting groove 32 for installing valve stem 4. A stop block 33 matching limit block 25 is installed on one side of the top of valve stem connector 3. The valve stem 4 has a locking pin 41 at its end that matches the mounting groove 32.

[0018] Locking holes 34 are provided on both sides of the inner wall of the top mounting groove 32 of the valve stem connector 3. The locking pin 41 is positioned and fixed in the locking hole 34. The valve stem 4 has a docking seat 42 extending downward from the end. The docking seat 42 is positioned in the mounting groove 32, and telescopic grooves 43 for mounting the locking pin 41 are provided on both sides of the docking seat 42. A locking spring 44 is provided between the telescopic groove 43 and the bottom of the locking pin 41.

[0019] A limiting ring 45 is provided at the opening of the telescopic groove 43, and a limiting plate 46 matching the limiting ring 45 is provided at the bottom edge of the locking post 41. The end of the locking post 41 is hemispherical.

[0020] The connecting seat 2 is placed inside the valve stem connecting piece 3 and is filled with a filler.

[0021] The valve stem connector 3 has a movable mounting groove 35 on one side of its top, and a movable block 36 matching the movable mounting groove 35 is provided on one side of the stop block 33. The movable block 36 and the movable mounting groove 35 have matching cross sections and are both T-shaped. The stop block 33 is L-shaped overall.

[0022] The limiting block 25 is provided with a limiting hook 26 on one side of the matching stop block 33.

[0023] In this embodiment, valve seat 1, connecting seat 2, valve stem connector 3, valve stem 4, locking cover 5, and sealing ring 6 are manufactured according to design specifications. Among them, the connecting seat 2 needs to be integrally formed with the docking stud 21, the limiting block 25 and the limiting hook 26. At the same time, a through hole 22 is machined in the middle of the docking stud 21, and a sealing groove 1 23 and a sealing groove 24 are respectively opened on the inner wall of the through hole 22 and the bottom inner wall of the connecting seat 2. The locking cover 5 is machined with the adapter hole 51 in the middle, and a sealing groove 3 52 is opened on the inner wall of the adapter hole 51. The valve stem connector 3 is machined with the positioning groove 31 on the outer wall, and the top is opened with the installation groove 32 and the movable installation groove 35. Locking holes 34 are drilled on both sides of the inner wall of the installation groove 32. The valve stem 4 is machined with the locking post 41 and the docking seat 42. The docking seat 42 is opened with the telescopic groove 43 on both sides. The opening of the telescopic groove 43 is installed with the limiting ring 45. The bottom edge of the locking post 41 is machined with the limiting plate 46 and the end is ground into a hemispherical shape. The stop block 33 is machined into an L shape, and a T-shaped movable block 36 is integrally formed on one side. Based on the dimensions of sealing groove 1 (23), sealing groove 2 (24), and sealing groove 3 (52), wear-resistant and corrosion-resistant elastic sealing rings 6 are selected and pre-installed into the three sealing grooves to ensure that the sealing rings 6 fit the groove walls without gaps.

[0024] Specifically, the locking spring 44 is placed into the telescopic groove 43 of the valve stem 4 docking seat 42, and then the locking pin 41 is placed into the telescopic groove 43. At this time, the limiting plate 46 and the limiting ring 45 cooperate to prevent the locking pin 41 from disengaging from the telescopic groove 43. Press the locking pin 41 and insert the docking seat 42 into the mounting groove 32 of the valve stem connector 3. When the locking pin 41 is aligned with the locking hole 34, the locking spring 44 resets and pushes the locking pin 41 into the locking hole 34, thus completing the fixation of the valve stem 4 and the valve stem connector 3 and realizing the synchronous rotation of the two.

[0025] Specifically, the T-shaped moving block 36 of the stop block 33 is aligned with the T-shaped moving mounting groove 35 of the valve stem connector 3, and the stop block 33 is pushed along the groove to the designated position so that the stop block 33 can rotate synchronously with the valve stem connector 3, and the radial displacement of the stop block 33 can be restricted by the moving mounting groove 35.

[0026] Specifically, the valve stem connector 3, with the valve stem 4 and the stop block 33 assembled, is inserted into the through hole 22 of the mating stud 21 at the top of the connecting seat 2, so that the positioning groove 31 on the outer wall of the valve stem connector 3 precisely fits with the sealing ring 6 in the sealing groove 23 and sealing groove 24 of the connecting seat 2. At the same time, it is ensured that the stop block 33 corresponds to the limiting block 25 of the connecting seat 2, and the limiting hook 26 on one side of the limiting block 25 can limit the rotation of the stop block 33.

[0027] Specifically, the locking cover 5 is screwed onto the mating stud 21 via the internal thread. During the process, it is ensured that the sealing groove 3 52 on the inner wall of the adapter hole 51 of the locking cover 5 fits against the outer wall of the valve stem connector 3. The sealing ring 6 in the sealing groove 3 52 is deformed under pressure, further enhancing the sealing performance between the valve stem connector 3 and the locking cover 5. After tightening, the locking cover 5 forms an axial fixation on the valve stem connector 3, preventing it from moving up and down.

[0028] Specifically, a sealing filler is filled into the gap between the inside of the connecting seat 2 and the outside of the valve stem connector 3. During the filling process, the filler is ensured to be evenly compacted to eliminate the gap. Finally, the valve is connected to the bottom of the valve stem connector 3 and the valve is placed inside the valve seat 1 to complete the overall assembly of the ball valve.

[0029] Specifically, rotating the valve stem 4 causes the valve stem connector 3 to rotate synchronously through the engagement of the locking pin 41 and the locking hole 34. The valve stem connector 3 then drives the bottom valve to rotate, thus opening and closing the ball valve. During rotation, the stop block 33 rotates with the valve stem connector 3. When the stop block 33 contacts the limit hook 26 of the limit block 25, the valve reaches its maximum open or closed position, preventing excessive rotation and damage to components. Regularly check the tightness of the locking cover 5. If it becomes loose, tighten it promptly to ensure that the sealing ring 6 is always in an effective sealing state. When the sealing ring 6 ages or wears, the locking cover 5 and the valve stem connector 3 can be disassembled to replace the sealing ring 6 with a new one, making maintenance convenient.

[0030] In this embodiment, sealing groove 1 23, sealing groove 24, and sealing groove 3 52 are respectively bonded to the outer wall of valve stem connector 3 through sealing ring 6, forming a triple sealing structure (upper, middle, and lower). This effectively prevents media leakage from the gap between valve stem connector 3 and connecting seat 2 and locking cover 5, solving the problem of easy failure of single seal in traditional ball valves. The positioning groove 31 on the outer wall of valve stem connector 3 can radially limit the sealing ring 6, preventing the sealing ring 6 from shifting due to friction during valve opening and closing, ensuring that the sealing surface is always in contact, and further improving sealing stability. At the same time, after the locking cover 5 is tightened, it generates continuous pressure on the sealing ring 6 in sealing groove 3 52, keeping the sealing ring 6 in a compressed state and enhancing the sealing effect.

[0031] In this embodiment, the valve stem 4 and the valve stem connector 3 are detachably fixed through the cooperation of the locking post 41, the locking spring 44, and the locking hole 34, resulting in high connection strength and preventing wear caused by relative sliding between the two. The end of the locking post 41 is hemispherical, which facilitates quick alignment with the locking hole 34 during assembly, and the cooperation between the limiting plate 46 and the limiting ring 45 can prevent the locking post 41 from falling off, making the structural design more reliable. The limiting block 25 and the limiting hook 26 of the connecting seat 2 can limit the rotation of the stop block 33, preventing the valve stem connector 3 from rotating excessively and causing the valve to collide and be damaged by the valve seat 1. The T-shaped moving block 36 of the stop block 33 cooperates with the T-shaped moving mounting groove 35 of the valve stem connector 3 to limit the radial displacement of the stop block 33, while not affecting its synchronous rotation with the valve stem connector 3, ensuring the long-term stability of the limiting structure. The filling material inside the connecting seat 2 can fill the tiny gap between the valve stem connector 3 and the connecting seat 2. On the one hand, it can assist in sealing, and on the other hand, it can reduce the direct friction between the valve stem connector 3 and the connecting seat 2 when rotating, reduce component wear, and extend the overall service life of the ball valve.

[0032] In this embodiment, the components are assembled using snap-fit, threaded, and adapter groove methods, eliminating the need for complex welding or special tools. For example, the valve stem 4 and valve stem connector 3 are quickly fixed by locking pin 41, and the locking cover 5 is quickly installed via threads, resulting in high assembly efficiency and facilitating mass production. When the sealing ring 6 ages or wears, it can be replaced simply by removing the locking cover 5 and taking out the valve stem connector 3, without disassembling the entire ball valve. The detachable design of the valve stem 4 and valve stem connector 3 also facilitates the individual replacement of damaged valve stems or valve stem connectors, reducing overall replacement costs and simplifying maintenance.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A well-sealed ball valve, characterized in that: Includes a valve seat (1), the valve seat (1) is provided with a connecting seat (2) at the top, a valve stem connector (3) is installed inside the connecting seat (2), a valve stem (4) is installed at the top of the valve stem connector (3), and a valve is connected to the bottom, the valve is located inside the valve seat (1); The connecting seat (2) is also provided with a locking cover (5), which is placed outside the valve stem connector (3); The bottom of the connecting seat (2) leads to the interior of the valve seat (1). The top of the connecting seat (2) extends with a docking stud (21). The middle of the docking stud (21) is provided with a through hole (22). The inner wall of the through hole (22) is provided with a sealing groove (23). The inner wall of the bottom of the connecting seat (2) is provided with a sealing groove (24). The side of the connecting seat (2) extends with a limiting block (25). The locking cover (5) is installed on the docking stud (21). The middle of the locking cover (5) is provided with an adapter hole (51) that matches the valve stem connector (3). The inner wall of the adapter hole (51) is provided with a sealing groove (52). A sealing ring (6) is installed in each of the sealing groove 1 (23), the sealing groove 2 (24) and the sealing groove 3 (52). A positioning groove (31) matching the sealing ring (6) is provided on the outer wall of the valve stem connector (3). An installation groove (32) for installing the valve stem (4) is provided on the top of the valve stem connector (3). A stop block (33) matching the limiting block (25) is installed on one side of the top of the valve stem connector (3). The valve stem (4) has a locking pin (41) at its end that matches the mounting groove (32).

2. The well-sealed ball valve according to claim 1, characterized in that: The valve stem connector (3) has locking holes (34) on both sides of the inner wall of the mounting groove (32) at the top. The locking pin (41) is fixed in the locking hole (34). The valve stem (4) has a docking seat (42) extending downward at its end. The docking seat (42) is positioned in the mounting groove (32). The docking seat (42) has telescopic grooves (43) on both sides for mounting the locking pin (41). A locking spring (44) is provided between the inside of the telescopic groove (43) and the bottom of the locking pin (41).

3. A well-sealed ball valve according to claim 2, characterized in that: The expansion groove (43) is provided with a limiting ring (45) at the opening, and the bottom edge of the locking post (41) is provided with a limiting plate (46) matching the limiting ring (45). The end of the locking post (41) is hemispherical.

4. A well-sealed ball valve according to claim 1, characterized in that: The connecting seat (2) is filled with a filling material placed inside the valve stem connector (3) outside.

5. A well-sealed ball valve according to claim 1, characterized in that: The valve stem connector (3) has a movable mounting groove (35) on one side of its top, and a movable block (36) matching the movable mounting groove (35) is provided on one side of the stop block (33). The movable block (36) and the movable mounting groove (35) have matching cross sections and are both T-shaped. The stop block (33) is L-shaped overall.

6. A well-sealed ball valve according to claim 1, characterized in that: The limiting block (25) has a limiting hook (26) on one side that matches the stop block (33).

Images