A ceramic ball valve

Abstract

The utility model relates to valve technical field especially ceramic ball valve, including valve body, ball core and valve seat, ball core and valve seat sealed cooperation are arranged in the valve body inside, and ball core and valve seat all adopt ceramic material, the one end of valve body inner wall is equipped with ring groove near valve seat, and the elastic assembly is inlayed in the ring groove, the annular abutment of valve seat outer wall extends along the radial direction has, the elastic assembly is surrounded on valve seat and forms the circumferential abutment with annular abutntment, and the elastic assembly includes the elastic sealing ring of distribution along valve seat axial direction, sliding ring and disc spring, the elastic sealing ring is clamped between annular abutment and sliding ring, and the thickness of annular abutment, elastic sealing ring and sliding ring three along the radial direction of valve seat is same, and disc spring is clamped between sliding ring and ring groove, the utility model adopts disc spring and through sliding ring and elastic sealing ring indirectly push the annular abutment of valve seat, has realized the effect of floating valve seat, can make valve seat even stress not tilt again, has guaranteed stable sealing.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a ceramic ball valve. Background Technology

[0002] Ceramic ball valves are a type of ball valve that uses structural ceramic materials to manufacture sealing components and vulnerable parts, giving them characteristics such as corrosion resistance, wear resistance, and high hardness. All surfaces in contact with the medium are made of structural ceramic material with a Rockwell hardness of HRC90, exhibiting strong chemical stability. After precision grinding, they provide excellent sealing performance and can adapt to working conditions such as desulfurization slurry, dust, and highly corrosive media.

[0003] Existing ceramic ball valves typically employ a floating seat structure, which involves installing several circumferentially distributed helical springs between the valve body and the valve seat. These helical springs press the valve seat towards the ball core. Each helical spring has a very small contact area with the valve seat, and the helical springs provide different elastic forces due to varying degrees of fatigue. This results in uneven force distribution on the valve seat, causing it to tilt and potentially leading to leakage problems.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a ceramic ball valve. This invention uses a disc spring and indirectly pushes the annular contact part of the valve seat through a sliding ring and an elastic sealing ring, which not only achieves the effect of a floating valve seat, but also ensures that the valve seat is evenly stressed and does not tilt, thus guaranteeing a stable seal.

[0006] The technical solution adopted by this utility model is as follows: A ceramic ball valve includes a valve body, a ball core, and a valve seat. The ball core and the valve seat are sealed together inside the valve body, and both the ball core and the valve seat are made of ceramic material. An annular groove is provided on the inner wall of the valve body near the valve seat. An elastic component is embedded in the annular groove. An annular abutment portion extends radially from the outer wall of the valve seat. The elastic component surrounds the valve seat and forms a circumferential abutment with the annular abutment portion. The elastic component includes an elastic sealing ring, a sliding ring, and a disc spring distributed along the axial direction of the valve seat. The elastic sealing ring is sandwiched between the annular abutment portion and the sliding ring. The thickness of the annular abutment portion, the elastic sealing ring, and the sliding ring is the same along the radial direction of the valve seat. The disc spring is sandwiched between the sliding ring and the annular groove.

[0007] The elastic component also includes a clamping ring. The elastic sealing ring has a trapezoidal groove on the side near the sliding ring into which the clamping ring extends. The thickness of the clamping ring along the radial direction of the valve seat is less than that of the elastic sealing ring.

[0008] Both inner walls of the trapezoidal groove are inclined surfaces with the same slope, and the inner and outer edges of the end of the clamping ring that extends into the trapezoidal groove are provided with extrusion angles that match the inclined surfaces.

[0009] The clamping ring abuts against the inclined surface of the trapezoidal groove by squeezing the bevel, and a movable gap is formed between the clamping ring and the inner bottom wall of the trapezoidal groove.

[0010] The sliding ring has a U-shaped groove on the side away from the valve seat, and the disc spring is embedded in the U-shaped groove.

[0011] The valve body includes a valve core and connecting pipes disposed on both sides of the valve core. The valve core has a rotating cavity for installing a ball core. The annular groove is disposed on the inner wall of the connecting pipe. The connecting pipe is connected to the valve core through a connecting assembly, which includes bolts and nuts.

[0012] The bolt is also fitted with an anti-rotation washer and an elastic element. One end of the anti-rotation washer extends to a first washer that abuts against the side wall of the nut, and the other end extends to a second washer that abuts against both the connecting pipe and the valve body. The elastic element is abutted between the anti-rotation washer and the connecting pipe.

[0013] The valve body is also embedded with a ceramic liner, the annular abutment part abuts against the ceramic liner, and a sealing ring is provided between the annular abutment part and the ceramic liner.

[0014] The beneficial effects of this utility model are as follows: This utility model uses an elastic component to form a circumferential contact with the annular contact part of the valve seat, which can provide uniform radial elastic force and effectively avoid the valve seat tilting problem caused by uneven distribution or fatigue differences of traditional helical springs. The disc spring indirectly pushes the annular contact part of the valve seat through the sliding ring and the elastic sealing ring. Moreover, the thickness of the annular contact part, the elastic sealing ring and the sliding ring along the radial direction of the valve seat is the same, so that each component can transmit pressure evenly when subjected to force, avoid local stress concentration, improve the coordination of the overall structure and the fit of the sealing surface, achieve the effect of a floating valve seat, and ensure that the valve seat is evenly stressed and does not tilt, thus ensuring stable sealing. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a cross-sectional schematic diagram of a ceramic ball valve according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic diagram of the structure of the elastic sealing ring and the clamping ring in this utility model; Figure 4 for Figure 3 A magnified view of a portion of point B in the middle; In the diagram, 1-valve body, 2-ball core, 3-valve seat, 4-annular groove, 5-annular abutment part, 6-elastic sealing ring, 7-sliding ring, 8-disc spring, 9-compression ring, 10-trapezoidal groove, 11-inclined surface, 12-extrusion angle, 13-moving clearance, 14-U-shaped groove, 15-valve body, 16-connecting pipe, 17-rotating cavity, 18-bolt, 19-nut, 20-anti-rotation washer, 21-elastic element, 22-first washer, 23-second washer, 24-ceramic lining of the body, 25-sealing ring. Detailed Implementation

[0017] 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.

[0018] 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.

[0019] 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.

[0020] like Figures 1 to 4As shown, this is an embodiment of the present invention. A ceramic ball valve includes a valve body 1, a ball core 2, and a valve seat 3. The ball core 2 and the valve seat 3 are sealed together inside the valve body 1, and both the ball core 2 and the valve seat 3 are made of ceramic. An annular groove 4 is provided on the inner wall of the valve body 1 near the valve seat 3. An elastic component is embedded in the annular groove 4. An annular abutment portion 5 extends radially from the outer wall of the valve seat 3. The elastic component surrounds the valve seat 3 and forms a circumferential abutment with the annular abutment portion 5. The elastic component includes an elastic sealing ring 6, a sliding ring 7, and a disc spring 8 distributed axially along the valve seat 3. The elastic sealing ring 6 is sandwiched between the annular abutment portion 5 and the sliding ring 7. The thickness of the annular abutment portion 5, the elastic sealing ring 6, and the sliding ring 7 is the same along the radial direction of the valve seat 3. The disc spring 8 is sandwiched between the sliding ring 7 and the annular groove 4.

[0021] The beneficial effects of this design are as follows: This utility model uses an elastic component to form a circumferential contact with the annular contact part of the valve seat, which can provide uniform radial elastic force and effectively avoid the valve seat tilting problem caused by uneven distribution or fatigue differences of traditional helical springs. The disc spring indirectly pushes the annular contact part of the valve seat through the sliding ring and the elastic sealing ring. Moreover, the thickness of the annular contact part, the elastic sealing ring and the sliding ring along the radial direction of the valve seat is the same, so that each component can transmit pressure evenly when subjected to force, avoid local stress concentration, improve the coordination of the overall structure and the fit of the sealing surface, achieve the effect of a floating valve seat, and ensure that the valve seat is evenly stressed and does not tilt, thus ensuring stable sealing.

[0022] Furthermore, the elastic component also includes a clamping ring 9, and the elastic sealing ring 6 has a trapezoidal groove 10 on the side near the sliding ring 7 for the clamping ring 9 to extend into. The thickness of the clamping ring 9 along the radial direction of the valve seat 3 is less than that of the elastic sealing ring 6.

[0023] The beneficial effects of this design are as follows: the structure guides the elastic sealing ring to produce more optimized deformation, avoids uneven stress, makes the sealing stress distribution more uniform and gentle, improves the reliability of the seal and extends the life of the sealing ring. Moreover, the trapezoidal groove provides additional deformation space for the elastic sealing ring. Combined with the compression ring with a smaller radial thickness, the component can respond more sensitively to wear or pressure fluctuations, achieving better adaptive sealing compensation.

[0024] Furthermore, the inner walls on both sides of the trapezoidal groove 10 are inclined surfaces 11 with the same slope, and the inner and outer edges of the end of the clamping ring 9 that extends into the trapezoidal groove 10 are provided with extrusion angles 12 that are adapted to the inclined surfaces 11.

[0025] The beneficial effects of this design are as follows: the matching inclined surface and the extrusion angle form a perfect wedge-shaped fit structure, ensuring that the clamping ring can automatically center and align under force, effectively preventing skewing and making pressure transmission more precise and symmetrical. This wedge-shaped structure can smoothly convert the radial force borne by the clamping ring into a uniform expansion force acting on the inner walls of both sides of the trapezoidal groove of the elastic sealing ring, thereby greatly optimizing the stress deformation mode of the sealing ring, avoiding local stress concentration, and making the pressure distribution on the sealing surface more ideal. The optimized stress distribution is directly converted into a more stable and reliable sealing interface, ensuring the durability of the sealing effect.

[0026] In a further configuration, the clamping ring 9 abuts against the inclined surface 11 of the trapezoidal groove 10 by squeezing the chamfer 12, and an movable gap 13 is formed between the clamping ring 9 and the inner bottom wall of the trapezoidal groove 10.

[0027] The beneficial effects of this design are as follows: the movable gap provides crucial pre-displacement space for the clamping ring. When faced with pressure fluctuations, temperature changes, or slight wear on the sealing surface, the clamping ring can utilize this gap to make slight axial floats, timely compensating for and adjusting the clamping force on the elastic sealing ring. This greatly improves the stability and service life of the sealing system and also avoids excessive pre-compression of the elastic sealing ring by the clamping ring during installation, preventing premature aging of the sealing element.

[0028] Furthermore, the sliding ring 7 has a U-shaped groove 14 on the side away from the valve seat 3, and the disc spring 8 is embedded in the U-shaped groove 14.

[0029] The beneficial effects of this design are as follows: the U-shaped groove provides a precise installation and limiting structure for the disc spring, ensuring that the disc spring remains centered during compression and rebound, effectively preventing the risks of skewness, misalignment, or even instability, thereby ensuring the accuracy and consistency of the spring force application. The sliding ring also avoids direct contact between the disc spring and the valve seat, reducing the risk of ceramic valve seat brittleness.

[0030] Further, the valve body 1 includes a valve middle body 15 and connecting pipes 16 disposed on both sides of the valve middle body 15. The valve middle body 15 is provided with a rotating cavity 17 for mounting the ball core 2. The annular groove 4 is disposed on the inner wall of the connecting pipe 16. The connecting pipe 16 is connected to the valve middle body 15 through a connecting assembly, which includes bolts 18 and nuts 19.

[0031] The advantages of this design are as follows: the split design makes the valve assembly, disassembly and maintenance extremely convenient. There is no need to disassemble the entire valve, and internal parts can be replaced individually, reducing maintenance costs.

[0032] Furthermore, the bolt 18 is also fitted with an anti-rotation washer 20 and an elastic element 21. One end of the anti-rotation washer 20 extends to a first washer 22 that abuts against the side wall of the nut 19, and the other end extends to a second washer 23 that abuts against both the connecting pipe 16 and the valve body 15. The elastic element 21 is abutted between the anti-rotation washer 20 and the connecting pipe 16.

[0033] The beneficial effects of this design are as follows: the anti-rotation washer abuts against the side wall of the nut through its first washer, and the second washer abuts against both the connecting pipe and the valve body, forming a mechanical interlock. This effectively prevents the nut from rotating and loosening under vibration conditions. Combined with the continuous pressure provided by the elastic element, it constitutes a dual anti-loosening mechanism that combines mechanical locking and elastic pre-tightening, greatly improving the reliability of the bolt connection and the long-term sealing performance of the valve body structure. In this embodiment, the elastic element adopts a spring of existing technology.

[0034] Furthermore, the valve body 15 is also embedded with a ceramic liner 24, the annular abutment portion 5 abuts against the ceramic liner 24, and a sealing ring 25 is provided between the annular abutment portion 5 and the ceramic liner 24.

[0035] The beneficial effects of this design are as follows: the ceramic lining in the middle body ensures that all surfaces in contact with the medium are made of ceramic material, and the sealing ring enhances the sealing between the valve seat and the ceramic lining in the middle body, effectively preventing leakage of the medium in the rotating cavity and forming a crucial second sealing barrier.

[0036] 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.

Claims

1. A ceramic ball valve, comprising a valve body (1), a ball core (2), and a valve seat (3), wherein the ball core (2) and the valve seat (3) are sealed together inside the valve body (1), and both the ball core (2) and the valve seat (3) are made of ceramic material, characterized in that: The valve body (1) has an annular groove (4) at one end of its inner wall near the valve seat (3). An elastic component is embedded in the annular groove (4). The valve seat (3) has an annular abutment portion (5) extending radially on its outer wall. The elastic component surrounds the valve seat (3) and forms a circumferential abutment with the annular abutment portion (5). The elastic component includes an elastic sealing ring (6), a sliding ring (7), and a disc spring (8) distributed axially along the valve seat (3). The elastic sealing ring (6) is sandwiched between the annular abutment portion (5) and the sliding ring (7). The thickness of the annular abutment portion (5), the elastic sealing ring (6), and the sliding ring (7) is the same along the radial direction of the valve seat (3). The disc spring (8) is sandwiched between the sliding ring (7) and the annular groove (4).

2. The ceramic ball valve according to claim 1, characterized in that: The elastic component also includes a clamping ring (9), and the elastic sealing ring (6) has a trapezoidal groove (10) on the side near the sliding ring (7) for the clamping ring (9) to extend into. The thickness of the clamping ring (9) along the radial direction of the valve seat (3) is less than that of the elastic sealing ring (6).

3. A ceramic ball valve according to claim 2, characterized in that: The inner walls on both sides of the trapezoidal groove (10) are inclined surfaces (11) with the same slope. The inner edge and outer edge of the end of the clamping ring (9) that extends into the trapezoidal groove (10) are provided with a squeezing angle (12) that matches the inclined surface (11).

4. A ceramic ball valve according to claim 3, characterized in that: The clamping ring (9) abuts against the inclined surface (11) of the trapezoidal groove (10) by squeezing the chamfer (12), and a movable gap (13) is formed between the clamping ring (9) and the inner bottom wall of the trapezoidal groove (10).

5. A ceramic ball valve according to claim 1, characterized in that: The sliding ring (7) has a U-shaped groove (14) on the side away from the valve seat (3), and the disc spring (8) is embedded in the U-shaped groove (14).

6. A ceramic ball valve according to claim 1, characterized in that: The valve body (1) includes a valve middle body (15) and connecting pipes (16) disposed on both sides of the valve middle body (15). The valve middle body (15) is provided with a rotating cavity (17) for installing the ball core (2). The annular groove (4) is disposed on the inner wall of the connecting pipe (16). The connecting pipe (16) is connected to the valve middle body (15) through a connecting assembly. The connecting assembly includes bolts (18) and nuts (19).

7. A ceramic ball valve according to claim 6, characterized in that: The bolt (18) is also covered with an anti-rotation washer (20) and an elastic element (21). One end of the anti-rotation washer (20) extends to a first washer (22) that abuts against the side wall of the nut (19), and the other end extends to a second washer (23) that abuts against both the connecting pipe (16) and the valve body (15). The elastic element (21) is abutted between the anti-rotation washer (20) and the connecting pipe (16).

8. A ceramic ball valve according to claim 6, characterized in that: The valve body (15) is also embedded with a ceramic liner (24), the annular abutment part (5) abuts against the ceramic liner (24), and a sealing ring (25) is provided between the annular abutment part (5) and the ceramic liner (24).

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