A ball valve

Abstract

The utility model discloses a built-in ball valve, including the valve body, be equipped with valve stem, valve core, water inlet channel and water outlet channel in the valve body, the valve stem is through the rotation action control valve core switching water inlet channel and water outlet channel's communication or cut -off state, be equipped with the valve seat for being sealedly connected with valve core in cut -off state on the valve body, be equipped with the mounting groove on the valve body, the valve seat includes the limiting ring in the mounting groove, the sealing part is installed on the limiting ring, the sealing part includes the first extension arm and the second extension arm of L type arrangement, the first extension arm and the second extension arm inside are equipped with the first push surface and the second push surface of the inclined setting and with the abutment of limiting ring, the limiting ring makes the sealing part abutment with valve core through the elastic push and forms the sealed connection.

Description

Technical Field

[0001] This utility model relates to a built-in ball valve, belonging to the field of valves. Background Technology

[0002] Existing ball valves typically consist of a valve body, valve core (ball), valve stem, valve seat, and seals. To ensure sealing in the shut-off state, a common practice is to install an elastic seal between the valve seat and the ball, combined with a spring, elastic seat ring, or elastic element within the seat ring. This allows the valve seat to press tightly against the ball under pressure, compensating for gaps caused by wear, tolerances, and thermal expansion, thereby maintaining sealing performance. Furthermore, to prevent particulate matter or media from entering the valve seat and causing leakage or jamming, in practical engineering, filters are often installed upstream of the valve, special seat ring structures are used, or limiting elements are installed within the valve body to position and protect the seals.

[0003] Although the above solutions are widely used in industry, several shortcomings and engineering problems still need to be addressed: in high-pressure or particulate media, soft seals are easily extruded or worn; the force of springs decreases after long-term loading, leading to insufficient sealing force and static leakage; while metal seals are wear-resistant, they require high precision in sealing fit and have high manufacturing and assembly costs. Practical engineering requires a valve seat structure with a reliable limiting and elastic actuation mechanism within the valve body, enabling the sealing part to maintain stable and continuous tight contact with the valve core in the off state, while facilitating assembly and replacement, effectively resisting particulate wear and elastic component fatigue, thereby improving the long-term sealing performance and maintenance convenience of the valve. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a built-in ball valve, which aims to solve the problem of insufficient sealing force of the valve seat in existing valves.

[0005] A built-in ball valve includes a valve body, which contains a valve stem, a valve core, an inlet channel, and an outlet channel. The valve stem controls the valve core to switch between the connected and disconnected states of the inlet and outlet channels by rotation. The valve body has a valve seat for sealingly connecting with the valve core in the disconnected state. The valve body has a mounting groove, and the valve seat includes a limiting ring disposed in the mounting groove. A sealing part is installed on the limiting ring. The sealing part includes a first extension arm and a second extension arm arranged in an L-shape. The inner sides of the first and second extension arms have a first pushing surface and a second pushing surface that are inclined and abut against the limiting ring. The limiting ring elastically pushes the sealing part to abut against the valve core to form a sealed connection.

[0006] This technical solution enables the structure to reliably position the seal and provide continuous elastic pre-tightening in the cut-off state, thereby compensating for gaps caused by wear and thermal expansion and maintaining long-term sealing performance. The inclined pushing surface effectively converts the elastic pushing force into uniform contact pressure, improving the tightness and wear resistance of the seal. The L-shaped extension arm provides better support and anti-extrusion capability for the seal, especially suitable for media containing particles or high-pressure conditions. In addition, the cooperation between the mounting groove and the limiting ring facilitates the disassembly and replacement of the seal, improving the maintainability of the valve and the efficiency of on-site maintenance.

[0007] Preferably, the outer sides of the first extension arm and the second extension arm are provided with a first sealing protrusion and a second sealing protrusion, and a recessed deformation groove is provided between the first sealing protrusion and the second sealing protrusion. The deformation groove is used for the first sealing protrusion and the second sealing protrusion to deform and bend.

[0008] This technical solution involves a recessed deformation groove between the first and second sealing protrusions. When the sealing part contacts the valve core, the two sealing protrusions can undergo controlled bending deformation around the deformation groove, resulting in better fit and adaptability. This deformation groove provides a localized flexible deformation zone, improving the sealing protrusion's ability to conform to microscopic unevenness or manufacturing tolerances on the valve core surface, thereby reducing the probability of static leakage. Furthermore, the first and second sealing protrusions are made of elastic material.

[0009] Through this technical solution, the elastic material can actively compensate for minor irregularities and assembly tolerances on the valve core surface, further reducing the risk of static leakage. In the case of fluids containing particles or rapid opening and closing of the valve core, the elastic material can absorb impact and disperse stress, reducing hard contact wear on the valve core surface.

[0010] Furthermore, a limiting protrusion is provided above the first extension arm, and a limiting step is provided on the valve body to engage with the limiting protrusion.

[0011] With this technical solution, under conditions of media impact, valve core opening and closing, or long-term vibration, the sealing part will not lose its sealing contact with the valve core due to force displacement; the limiting step provides a clear installation position, enabling the sealing part to automatically align during assembly, and the snap-fit ​​limiting can limit the compression stroke of the sealing part, preventing premature damage to the seal due to excessive assembly force.

[0012] Preferably, the first pushing surface and the second pushing surface are V-shaped, and a buffer groove is provided between the first pushing surface and the second pushing surface.

[0013] Through this technical solution, the V-shaped structure can provide bidirectional guidance during the pushing process of the limiting ring, making the sealing part more uniformly stressed and avoiding unilateral deviation; the buffer groove can generate elastic deformation space during the contact between the sealing part and the valve core, absorbing part of the extrusion energy and reducing fatigue damage to the seal.

[0014] Preferably, the top of the limiting ring is provided with a first limiting surface and a second limiting surface, and the connection between the first limiting surface and the second limiting surface abuts against the limiting step to form a limiting connection.

[0015] This technical solution enables curved surfaces to act as self-guides and self-correctors during assembly, making it easier for the locating ring to be aligned with the correct position. Compared to straight steps, curved surface connections are more tolerant of assembly tolerances, making them easier for mass production.

[0016] Furthermore, a spring is also provided in the mounting groove, and a push plate is provided at the bottom of the spring to abut against the second limiting curved surface. The push plate is used to push the limiting ring so that the sealing part abuts against the valve core to form a sealing connection.

[0017] With this technical solution, the spring can continuously provide elastic preload, pushing the limit ring to always press the sealing part tightly, so that the seal can be maintained even if the valve core is worn or has tolerances; when the valve core or sealing part is worn or deformed due to long-term use, the spring can automatically compensate to avoid a decrease in sealing force.

[0018] Furthermore, the limiting ring is made of an elastic material.

[0019] Through this technical solution, the elastic limiting ring can automatically deform under the action of the valve core, continuously pushing the sealing part to fit the valve core, thus achieving a long-term reliable seal; the limiting ring can repeatedly deform under the action of the medium pressure and the valve core, automatically compensating for the gaps caused by wear, tolerance, and thermal expansion and contraction.

[0020] Preferably, the other end of the valve stem is connected to an electric actuator.

[0021] This technical solution enables automatic opening and closing of valves, eliminating manual operation and improving system operating efficiency. The electric actuator can be combined with limit switches and position feedback devices to form a complete automated execution unit, expanding application scenarios.

[0022] Preferably, the valve core is provided with a mating interface that connects with the inlet channel and the outlet channel when in the connected state.

[0023] This technical solution optimizes the flow of different fluids (liquids, gases, slurries) by changing the shape of the interface (such as circular, elliptical, or rectangular grooves).

[0024] The beneficial effects of this utility model are as follows: This structure can reliably position the seal and provide continuous elastic pre-tightening in the cut-off state, thereby compensating for the gaps caused by wear and thermal expansion and maintaining long-term sealing performance; the inclined pushing surface effectively converts the elastic pushing force into uniform contact pressure, improving the tightness and wear resistance of the seal; the L-shaped extension arm provides better support and anti-extrusion capability for the seal, especially suitable for media containing particles or high-pressure conditions; in addition, the cooperation between the mounting groove and the limiting ring facilitates the disassembly and replacement of the sealing part, improving the maintainability of the valve and the efficiency of on-site maintenance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a utility model Figure 2 A magnified view showing the details at point A in the middle; In the diagram, 1. Valve body; 11. Inlet channel; 12. Outlet channel; 13. Mounting groove; 14. Limiting step; 15. Spring; 16. Push plate; 2. Valve stem; 3. Electric actuator; 4. Valve core; 41. Connecting interface; 5. Valve seat; 51. Limiting ring; 511. First limiting curved surface; 512. Second limiting curved surface; 513. Sealing part; 52. First extension arm; 521. First pushing surface; 522. First sealing protrusion; 523. Deformation groove; 524. Limiting protrusion; 525. Buffer groove; 53. Second extension arm; 531. Second pushing surface; 532. Second sealing protrusion. Detailed Implementation

[0027] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0028] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0029] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0030] like Figure 1-3 The illustration shows an embodiment of a built-in ball valve according to the present invention, comprising a valve body 1, wherein the valve body 1 is provided with a valve stem 2, a valve core 4, an inlet channel 11, and an outlet channel 12. The valve stem 2 controls the valve core 4 to switch the connection or disconnection state of the inlet channel 11 and the outlet channel 12 by rotating. The valve body 1 is provided with a valve seat 5 for sealing connection with the valve core 4 in the disconnected state. The valve body 1 is provided with a mounting groove 13. The valve seat 5 includes a limiting ring 51 disposed in the mounting groove 13. A sealing part 513 is installed on the limiting ring 51. The sealing part 513 includes a first extension arm 52 and a second extension arm 53 arranged in an L-shape. The inner sides of the first extension arm 52 and the second extension arm 53 are provided with a first pushing surface 521 and a second pushing surface 531 that are inclined and abut against the limiting ring 51. The limiting ring 51 elastically pushes the sealing part 513 to abut against the valve core 4 to form a sealing connection.

[0031] Through this technical solution, the structure can reliably position the seal and provide continuous elastic pre-tightening in the cut-off state, thereby compensating for gaps caused by wear and thermal expansion and maintaining long-term sealing performance; the inclined pushing surface effectively converts the elastic pushing force into uniform contact pressure, improving the tightness and wear resistance of the seal; the L-shaped extension arm provides better support and anti-extrusion capability for the seal, especially suitable for particulate media or high-pressure conditions; in addition, the cooperation between the mounting groove 13 and the limiting ring 51 facilitates the disassembly and replacement of the sealing part 513, improving the maintainability of the valve and the efficiency of on-site maintenance.

[0032] The first extension arm 52 and the second extension arm 53 are provided with a first sealing protrusion 522 and a second sealing protrusion 532 on their outer sides. A deformation groove 523 is provided between the first sealing protrusion 522 and the second sealing protrusion 532. The deformation groove 523 is used for the first sealing protrusion 522 and the second sealing protrusion 532 to deform and bend.

[0033] This technical solution involves a recessed deformation groove 523 between the first sealing protrusion 522 and the second sealing protrusion 532. This allows the sealing protrusions on both sides to undergo controlled bending deformation around the deformation groove 523 when the sealing part 513 contacts the valve core 4, thereby achieving better fit and adaptability. The deformation groove 523 provides a localized flexible deformation zone, improving the sealing protrusion's ability to fit microscopic unevenness or manufacturing tolerances on the valve core 4 surface, thus reducing the probability of static leakage. The first sealing protrusion 522 and the second sealing protrusion 532 are made of elastic material.

[0034] Through this technical solution, the elastic material can actively compensate for the minor unevenness and assembly tolerances on the surface of the valve core 4, further reducing the risk of static leakage; under conditions of particulate fluid or rapid opening and closing of the valve core 4, the elastic material can absorb impact and disperse stress, reducing hard contact wear on the surface of the valve core 4.

[0035] A limiting protrusion 524 is provided above the first extension arm 52, and a limiting step 14 is provided on the valve body 1 to engage with the limiting protrusion 524.

[0036] With this technical solution, under conditions of media impact, valve core 4 opening and closing, or long-term vibration, the sealing part 513 will not lose its sealing contact with the valve core 4 due to force displacement; the limiting step 14 provides a clear installation position, so that the sealing part 513 is automatically aligned during assembly, and the snap-fit ​​limiting can limit the compression stroke of the sealing part 513, preventing premature damage to the seal due to excessive assembly force.

[0037] The first pushing surface 521 and the second pushing surface 531 are V-shaped, and a buffer groove 525 is provided between the first pushing surface 521 and the second pushing surface 531.

[0038] Through this technical solution, the V-shaped structure can provide bidirectional guidance during the pushing process of the limiting ring 51, making the sealing part 513 more uniformly stressed and avoiding unilateral deviation; the buffer groove 525 can generate elastic deformation space during the contact between the sealing part 513 and the valve core 4, absorbing part of the extrusion energy and reducing fatigue damage to the seal.

[0039] The top of the limiting ring 51 is provided with a first limiting surface 511 and a second limiting surface 512, and the connection between the first limiting surface 511 and the second limiting surface 512 abuts against the limiting step 14 to form a limiting connection.

[0040] Through this technical solution, the curved surface fit can play a self-guiding and self-correcting role during assembly, making it easier for the limit ring 51 to be aligned with the correct position; compared with straight steps, the curved surface connection is more tolerant of assembly tolerances and is convenient for mass production.

[0041] A spring 15 is also provided in the mounting groove 13. The bottom of the spring 15 is provided with a push plate 16 that abuts against the second limiting curved surface 512. The push plate 16 is used to push the limiting ring 51 so that the sealing part 513 abuts against the valve core 4 to form a sealed connection.

[0042] Through this technical solution, the spring 15 can continuously provide elastic preload force to push the limit ring 51 to always press the sealing part 513, so that the seal can be maintained even if the valve core 4 is worn or has tolerances; when the valve core 4 or the sealing part 513 is worn or deformed due to long-term use, the spring 15 can automatically compensate to avoid the decrease in sealing force.

[0043] The limiting ring 51 is made of an elastic material.

[0044] Through this technical solution, the elastic limiting ring 51 can automatically deform under the action of the valve core 4, continuously pushing the sealing part 513 to fit against the valve core 4, thus achieving a long-term reliable seal; the limiting ring 51 can repeatedly deform under the action of the medium pressure and the valve core 4, automatically compensating for the gaps caused by wear, tolerance, and thermal expansion and contraction.

[0045] The other end of the valve stem 2 is connected to an electric actuator 3.

[0046] This technical solution enables automatic opening and closing of valves, eliminating manual operation and improving system operating efficiency. The electric actuator 3 can be combined with limit switches and position feedback devices to form a complete automated execution unit, expanding application scenarios.

[0047] The valve core 4 is provided with a docking interface 41 that connects with the water inlet channel 11 and the water outlet channel 12 when in the connected state.

[0048] This technical solution optimizes the flow of different fluids (liquids, gases, slurries) by changing the shape of the interface 41 (e.g., circular, elliptical, rectangular groove).

[0049] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0050] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A built-in ball valve, characterized in that: The valve includes a valve body, which contains a valve stem, a valve core, an inlet channel, and an outlet channel. The valve stem controls the valve core to switch between the connected and disconnected states of the inlet and outlet channels through rotation. The valve body has a valve seat for sealing connection with the valve core in the disconnected state. The valve body has a mounting groove, and the valve seat includes a limiting ring disposed in the mounting groove. A sealing part is installed on the limiting ring. The sealing part includes a first extension arm and a second extension arm arranged in an L-shape. The inner sides of the first extension arm and the second extension arm are provided with a first pushing surface and a second pushing surface that are inclined and abut against the limiting ring. The limiting ring elastically pushes the sealing part to abut against the valve core to form a sealed connection.

2. The built-in ball valve as described in claim 1, characterized in that: The first extension arm and the second extension arm are provided with a first sealing protrusion and a second sealing protrusion on their outer sides. A deformation groove is provided between the first sealing protrusion and the second sealing protrusion. The deformation groove is used for the first sealing protrusion and the second sealing protrusion to deform and bend.

3. The built-in ball valve as described in claim 2, characterized in that: The first and second sealing protrusions are made of elastic material.

4. The built-in ball valve as described in claim 3, characterized in that: A limiting protrusion is provided above the first extension arm, and a limiting step is provided on the valve body to engage with the limiting protrusion.

5. The built-in ball valve as described in claim 1, characterized in that: The first and second pushing surfaces are arranged in a V-shape, and a buffer groove is provided between the first and second pushing surfaces.

6. The built-in ball valve as described in claim 1, characterized in that: The top of the limiting ring is provided with a first limiting surface and a second limiting surface, and the connection between the first limiting surface and the second limiting surface abuts against the limiting step to form a limiting connection.

7. The built-in ball valve as described in claim 6, characterized in that: A spring is also provided in the mounting groove. The bottom of the spring is provided with a push plate that abuts against the second limiting curved surface. The push plate is used to push the limiting ring so that the sealing part abuts against the valve core to form a sealing connection.

8. The built-in ball valve as described in claim 1 or 6, characterized in that: The limiting ring is made of an elastic material.

9. The built-in ball valve as described in claim 1, characterized in that: An electric actuator is connected to the other end of the valve stem.

10. The built-in ball valve as described in claim 1, characterized in that: The valve core is provided with a connector that connects to the inlet and outlet water channels when in the connected state.

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