High-temperature stable-torque high-frequency ball valve

Abstract

The utility model discloses a high-temperature stable-torque high-frequency ball valve which comprises an outer shell, a ball body installed in the outer shell and a valve rod connected to the ball body, and a valve seat module for achieving clearance sealing is arranged between the ball body and the outer shell. The valve seat module comprises a valve seat, a wedge-shaped sealing ring, a pressing ring and an elastic assembly, wherein the wedge-shaped sealing ring is arranged on the outer wall of the valve seat to achieve sealing between the valve seat and the outer shell, the pressing ring is pressed on the side edge of the wedge-shaped sealing ring, and the elastic assembly is arranged on the side edge of the pressing ring and elastically pressed on the pressing ring. A floating gap allowing the elastic assembly to move left and right is formed between the elastic assembly and the valve seat. The elastic assembly comprises a T-shaped installation base and two disc spring sets oppositely arranged on the two sides of the T-shaped installation base. The structure of the valve seat is simplified, elastic failure caused by the fact that the disc spring set makes contact with media can be avoided, stable and effective pre-tightening force can be provided for the valve seat, and stability of torque during opening and closing of the ball valve is guaranteed.

Description

[Technical Field]

[0001] This utility model belongs to the field of ball valve technology, and in particular relates to a high-temperature stable torque high-frequency ball valve. [Background Technology]

[0002] With the continuous improvement of industrial standards, the application conditions of ball valves are becoming increasingly demanding. When traditional ball valves are used in ultra-high temperature conditions, the high temperature of the medium will affect the elasticity of the elastic device, causing the elasticity to decrease, which will lead to a decrease in the sealing performance of the ball and the valve seat and cause leakage.

[0003] A high-temperature hard-seal ball valve structure disclosed in Chinese Patent Publication No. CN221482710U features a spring seat at the end of the valve seat, and a double disc spring structure between the spring seat and the valve cover. The double disc spring structure and the spring seat are elastically coupled to ensure the seal between the valve seat and the ball by increasing the elastic force. However, in this design, the double disc spring structure is in direct contact with the medium, and the two disc springs are arranged close to each other. Under the long-term pressure impact of the medium, the two disc springs will interact and undergo irregular deformation, resulting in positional displacement. This causes uneven force on the valve seat, leading to the failure of the seal between the valve seat and the ball.

[0004] To address the problems of the aforementioned solutions, a PDS high-frequency switching ball valve disclosed in Chinese Patent Publication No. CN114427607A incorporates a butterfly spring assembly on the valve seat. This arrangement avoids direct contact between the butterfly spring assembly and the medium, preventing the medium pressure from affecting it. Furthermore, the butterfly spring assembly consists of two butterfly springs separated by a partition, which prevents deformation due to interaction between the two springs. While this solution addresses the issues in the solution of Publication No. CN221482710U, it introduces new problems. The valve seat supporting the butterfly spring assembly extends a considerable length and is relatively thin. The valve seat below the butterfly spring assembly directly contacts the medium, and the impact of the medium can cause deformation at this point, allowing the medium to enter the butterfly spring assembly and causing it to lose its elasticity. Moreover, the complex valve seat structure in this solution increases the difficulty of installation and raises production costs.

[0005] Therefore, it is necessary to provide a high-temperature, stable-torque, high-frequency ball valve to solve the above-mentioned technical problems. [Utility Model Content]

[0006] The main purpose of this utility model is to provide a high-temperature, stable torque, high-frequency ball valve, which simplifies the structure of the valve seat, avoids the disc spring assembly from contacting the medium and losing its elasticity, and can provide a stable and effective preload force to the valve seat, ensuring the stability of the torque when the ball valve is opened and closed.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a high-temperature stable torque high-frequency ball valve, comprising a housing, a ball installed inside the housing, and a valve stem connected to the ball, wherein a valve seat module is provided between the ball and the housing to achieve a gap seal; the valve seat module includes a valve seat, a wedge-shaped sealing ring disposed on the outer wall of the valve seat to achieve a seal between the valve seat and the housing, a pressure ring pressed against the side of the wedge-shaped sealing ring, and an elastic component disposed on the side of the pressure ring and elastically pressed against the pressure ring, wherein a floating gap is formed between the elastic component and the valve seat to allow the elastic component to move left and right; the elastic component includes a T-shaped mounting base and two disc spring assemblies disposed opposite to each other on both sides of the T-shaped mounting base.

[0008] Furthermore, the T-shaped mounting base includes a bottom support portion and an isolation portion extending vertically from the middle of the support portion to the inner wall of the outer shell. The left side of the isolation portion forms a first mounting cavity around the inner wall of the outer shell, and the right side forms a second mounting cavity with the side of the pressure ring. The disc spring assembly is provided in both the first mounting cavity and the second mounting cavity.

[0009] Furthermore, the valve seat includes a first sealing surface that contacts the ball to achieve a seal, a horizontal second sealing surface that contacts the outer casing to achieve a seal, and a vertical contact surface facing the elastic component. A floating gap is formed between the contact surface and the elastic component.

[0010] Furthermore, the first sealing surface is provided with an annular protrusion that first contacts and seals with the sphere.

[0011] Furthermore, the second sealing surface is provided with a wedge-shaped mounting groove on the side facing the elastic component, the wedge-shaped sealing ring is disposed in the wedge-shaped mounting groove, one side of the pressure ring is located in the wedge-shaped mounting groove and pressed against the side of the wedge-shaped sealing ring, and the other side is located in the floating gap and is elastically pressed by the elastic component.

[0012] Furthermore, the outer surface and inner cavity of the sphere, as well as the outer surface of the valve seat, are all coated with a nano-coating to prevent media adhesion.

[0013] Furthermore, the outer casing includes a valve body and a valve cap disposed on one side of the valve body, the ball is installed inside the valve body, a stuffing box is provided at the upper end of the valve body, and the stuffing box is provided with packing to achieve a gap seal between the valve body and the valve stem.

[0014] Compared with the prior art, the advantages of this high-temperature stable torque high-frequency ball valve are as follows:

[0015] (1) A T-shaped mounting seat for mounting disc spring assembly is provided on the side of the valve seat. The lower support of the T-shaped mounting seat can support the disc spring assembly. The middle isolation part can not only separate the disc spring assembly, but also abut against the inner wall of the outer shell to ensure the stability of the T-shaped mounting seat floating left and right. Compared with the prior art, the design of this solution simplifies the structure of the valve seat, and the T-shaped mounting seat can also prevent the disc spring assembly from contacting the medium and losing its elasticity.

[0016] (2) The two disc spring assemblies are supported by T-shaped mounting bases and separated from each other. The two disc spring assemblies are connected in parallel, which has high elasticity and good self-adjustment ability. Even when faced with large temperature and pressure changes, they can still output elastic force stably. The T-shaped mounting base and the two disc spring assemblies are assembled in parallel, which can effectively prevent the two disc spring assemblies from being misaligned during assembly. Moreover, in high temperature and high pressure conditions, when the components are thermally expanded, the T-shaped mounting base can ensure that the two disc spring assemblies are concentric and the force position is consistent, thereby continuously providing a stable and effective valve seat preload force and ensuring the stability of the torque when the ball valve is opened and closed. In addition, the two disc spring assemblies are installed in the first mounting cavity and the second mounting cavity respectively, which can also avoid the disc spring assemblies from being misaligned due to excessive instantaneous pipeline pressure, effectively preventing problems such as jamming and leakage. [Attached Image Description]

[0017] Figure 1 This is a cross-sectional structural schematic diagram of the high-temperature stable torque high-frequency ball valve according to an embodiment of the present invention;

[0018] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged structural diagram of point A;

[0019] The numbers in the image represent:

[0020] 100-High Temperature Stable Torque High Frequency Ball Valve;

[0021] 1-Outer shell, 11-Valve body, 12-Valve cap, 13-Stuffing gland, 14-Stuffing;

[0022] 2-Ball; 3-Valve stem;

[0023] 4-Valve seat module, 41-Valve seat, 411-First sealing surface, 412-Second sealing surface, 413-Contact surface, 414-Annular protrusion, 415-Wedge mounting groove, 42-Wedge sealing ring, 43-Pressure ring, 44-Elastic component, 441-T-type mounting base, 4411-Support part, 4412-Isolation part, 442-Disc spring assembly, 443-First mounting cavity, 444-Second mounting cavity, 45-Floating clearance.

Detailed Implementation Methods

[0024] Please refer to Figures 1-2This embodiment is a high-temperature stable torque high-frequency ball valve 100. The high-temperature stable torque high-frequency ball valve 100 includes a housing 1, a ball 2 installed inside the housing 1, and a valve stem 3 connected to the ball 2. A valve seat module 4 is provided between the ball 2 and the housing 1 to achieve a gap seal. The valve seat module 4 includes a valve seat 41, a wedge-shaped sealing ring 42 disposed on the outer wall of the valve seat 41 to achieve a seal between the valve seat 41 and the housing, a pressure ring 43 pressed against the side of the wedge-shaped sealing ring 42, and an elastic component 44 disposed on the side of the pressure ring 43 and elastically pressed against the pressure ring 43. A floating gap 45 is formed between the elastic component 44 and the valve seat 41 to allow the elastic component 44 to move left and right. The elastic component 44 includes a T-shaped mounting base 441 and two disc spring assemblies 442 disposed opposite to each other on both sides of the T-shaped mounting base 441.

[0025] The T-shaped mounting base 441 includes a support portion 4411 at the bottom and an isolation portion 4412 extending vertically from the middle of the support portion 4411 to the inner wall of the outer casing 1. The left side of the isolation portion 4412 and the inner wall of the outer casing 1 form a first mounting cavity 443, and the right side and the side of the pressure ring 43 form a second mounting cavity 444. Disc spring assemblies 442 are provided in both the first mounting cavity 443 and the second mounting cavity 444.

[0026] The valve seat 41 is provided with a T-shaped mounting base 441 for mounting the disc spring assembly 442 on its side. The lower support part 4411 of the T-shaped mounting base 441 can support the disc spring assembly 442, and the middle isolation part 4412 can not only separate the disc spring assembly 442, but also abut against the inner wall of the outer shell 1 to ensure the stability of the T-shaped mounting base 441 floating left and right. Compared with the prior art, the design of this solution simplifies the structure of the valve seat 41 and also avoids the disc spring assembly 442 from contacting the medium and losing its elasticity.

[0027] Two disc spring assemblies 442 are provided. Even if one disc spring assembly 442 degrades in performance due to wear or fatigue, the other disc spring assembly 442 can still provide sufficient preload, thereby maintaining the stability of the overall system and improving the sealing performance of the valve seat 41. Moreover, the two disc spring assemblies 442 are supported by a T-shaped mounting base 441 and spaced apart. The parallel structure of the two disc spring assemblies 442 has high elasticity and good self-adjustment capability, and can still stably output spring force even when facing large temperature and pressure changes. The T-shaped mounting base 441 and the two disc spring assemblies 442 are assembled in parallel. This method effectively prevents misalignment or displacement of the two disc spring assemblies 442 during assembly. Moreover, under high temperature and high pressure conditions, when components undergo thermal expansion, the T-shaped mounting base 441 ensures that the two disc spring assemblies 442 are concentric and have consistent force positions, thereby continuously providing a stable and effective valve seat preload and ensuring stable torque during ball valve opening and closing. In addition, since the two disc spring assemblies 442 are installed in the first mounting cavity 443 and the second mounting cavity 444 respectively, it can also prevent the disc spring assemblies 442 from shifting due to excessive instantaneous pipeline pressure, effectively preventing problems such as jamming and leakage.

[0028] When the ball 2 squeezes the valve seat 41, the two disc spring assemblies 442 are compressed simultaneously, and the T-shaped mounting seat 441 floats to the left. At this time, the two disc spring assemblies 442 are compressed and have a large preload. The two disc spring assemblies 442 extend and take the T-shaped mounting seat 441 to float to the right, thereby elastically squeezing the pressure ring 43. The pressure ring 43 further squeezes the wedge-shaped sealing ring 42. The wedge-shaped sealing ring 42 transmits pressure to the valve seat 41, so that the valve seat 41 and the ball 2 achieve a gap seal.

[0029] The valve seat 41 includes a first sealing surface 411 that contacts the ball to achieve a seal, a second sealing surface 412 that contacts the outer wall of the outer casing 1 to achieve a seal and is horizontal, and a contact surface 413 that faces the elastic component 44 and is vertical. A floating gap 45 is formed between the contact surface 413 and the elastic component 44.

[0030] To improve the sealing effect between the valve seat 41 and the ball 2, an annular protrusion 414 is provided on the first sealing surface 411, which first contacts and seals with the ball 2. The ball 2 first contacts and seals with the annular protrusion 414. After the extrusion pressure of the ball 2 increases, the ball 2 will squeeze the annular protrusion 414 and then make complete contact with the first sealing surface 411 to achieve a seal. Compared with ordinary flat contact, the annular protrusion 414 can significantly increase the elastic deformation after being compressed, improve the sealing effect between the valve seat 41 and the ball 2, and also enhance the bearing capacity of the valve seat 41, thereby reducing the wear on the valve seat 41 and extending the service life of the valve seat 41.

[0031] The second sealing surface 412 has a wedge-shaped mounting groove 415 on the side facing the elastic component 44. The wedge-shaped sealing ring 42 is disposed in the wedge-shaped mounting groove 415. One side of the pressure ring 43 is located in the wedge-shaped mounting groove 415 and pressed against the side of the wedge-shaped sealing ring 42, while the other side is located in the floating gap 45 and is elastically pressed by the elastic component 44. This allows the elastic component 44 to act on the pressure ring 43, causing the wedge-shaped sealing ring 42 and the valve seat 41 to move to the right, thus sealing the valve seat 41 and the ball 2. The wedge-shaped sealing ring 42 and the wedge-shaped mounting groove 415 conform to each other, and the wedge-shaped structure achieves the sealing of the wedge-shaped sealing ring 42, reducing the deformation stress of the wedge-shaped sealing ring 42, reducing the cold flow and wear of the wedge-shaped sealing ring 42. The material of the wedge-shaped sealing ring 42 is graphite, which is more stable and reliable, and can improve the sealing effect between the valve seat 41 and the outer shell 1, thereby increasing the service life of the ball valve.

[0032] The outer casing 1 includes a valve body 11 and a valve cap 12 disposed on one side of the valve body 11. A ball 2 is installed inside the valve body 11. A stuffing box 13 is provided at the upper end of the valve body 11. A packing 14 is provided inside the stuffing box 13 to achieve a gap seal between the valve body 11 and the valve stem 3.

[0033] The outer surface and inner cavity of the ball 2, as well as the outer surface of the valve seat 41, are all coated with a nano-coating to prevent media adhesion. This avoids adhesion, scratches, and wear caused by the medium 2 adhering to the surface of the valve seat 41 and the ball 2 after long-term use of the ball valve. This provides a strong guarantee for the stability of the valve torque and greatly improves the service life of the valve.

[0034] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A high-temperature, stable-torque, high-frequency ball valve, characterized in that: It includes an outer shell, a ball installed inside the outer shell, and a valve stem connected to the ball. A valve seat module is provided between the ball and the outer shell to achieve a gap seal. The valve seat module includes a valve seat, a wedge-shaped sealing ring disposed on the outer wall of the valve seat to achieve a seal between the valve seat and the outer shell, a pressure ring pressed against the side of the wedge-shaped sealing ring, and an elastic component disposed on the side of the pressure ring and elastically pressed against the pressure ring. A floating gap is formed between the elastic component and the valve seat to allow the elastic component to move left and right. The elastic component includes a T-shaped mounting base and two disc spring assemblies disposed opposite to each other on both sides of the T-shaped mounting base.

2. The high-temperature stable torque high-frequency ball valve as described in claim 1, characterized in that: The T-shaped mounting base includes a bottom support portion and an isolation portion extending vertically from the middle of the support portion to the inner wall of the outer shell. The left side of the isolation portion and the inner wall of the outer shell form a first mounting cavity, and the right side and the side of the pressure ring form a second mounting cavity. The disc spring assembly is provided in both the first mounting cavity and the second mounting cavity.

3. The high-temperature stable torque high-frequency ball valve as described in claim 1, characterized in that: The valve seat includes a first sealing surface that contacts the ball to achieve a seal, a horizontal second sealing surface that contacts the outer casing to achieve a seal, and a vertical contact surface facing the elastic component. A floating gap is formed between the contact surface and the elastic component.

4. The high-temperature stable torque high-frequency ball valve as described in claim 3, characterized in that: The first sealing surface is provided with an annular protrusion that first contacts and seals with the sphere.

5. A high-temperature, stable torque, high-frequency ball valve as described in claim 3, characterized in that: The second sealing surface has a wedge-shaped mounting groove on the side facing the elastic component. The wedge-shaped sealing ring is disposed in the wedge-shaped mounting groove. One side of the pressure ring is located in the wedge-shaped mounting groove and pressed against the side of the wedge-shaped sealing ring, while the other side is located in the floating gap and is elastically pressed by the elastic component.

6. The high-temperature stable torque high-frequency ball valve as described in claim 1, characterized in that: The outer surface and inner cavity of the sphere, as well as the outer surface of the valve seat, are all coated with a nano-coating to prevent media adhesion.

7. The high-temperature stable torque high-frequency ball valve as described in claim 1, characterized in that: The outer casing includes a valve body and a valve cap disposed on one side of the valve body. The ball is installed inside the valve body. A stuffing box is provided at the upper end of the valve body, and the stuffing box is provided with packing to achieve a gap seal between the valve body and the valve stem.

Images