Ball valve casting with sealing function

Abstract

A ball valve casting with sealing function, including a valve body, the valve body is equipped with medium inlet and medium outlet, the valve body is equipped with valve stem, valve core and upper valve cover, the valve body and upper valve cover are equipped with sealing parts, the sealing parts include a compression ring, the compression ring is connected with the upper valve cover through a limiting bolt, one end of the compression ring extends to the valve body and the upper compression cover and abuts against a sealing block, the compression ring is provided with a connecting hole, the limiting bolt is provided with a limiting sleeve, the limiting sleeve is in abutment with the upper valve cover at the bottom to form a gap between the compression ring and the upper valve cover, when the upper valve cover is pressed, the limiting bolt is moved to press the sealing block.

Description

Technical Field

[0001] This utility model relates to a ball valve casting with sealing function, belonging to the field of valves. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can also be used for fluid regulation and control. Hard-seal V-type ball valves, with their V-shaped ball core and hard alloy-faced metal seat, possess strong shearing force, making them particularly suitable for media containing fibers or small solid particles. Multi-port ball valves not only flexibly control the merging, splitting, and switching of flow directions in pipelines, but also allow the closure of any channel while connecting two other channels.

[0003] In the prior art, when fluid flows through the valve body and the upper valve cover, the upper valve cover must be fixed in the axial direction so that the fluid can be sealed stably. However, the larger the size of the ball valve, the greater the force acting on the upper valve cover, which can easily lead to deformation. Traditional valves are generally fixed with bolts, but this connection method is not strong enough when the ball valve diameter is large, and cannot guarantee the performance of the ball 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 ball valve casting with sealing function, aiming to solve the problem of poor sealing effect of the upper valve cover when the existing ball valve has excessive delay.

[0005] A ball valve casting with sealing function includes a valve body, a medium inlet and a medium outlet, a valve stem, a valve core and an upper valve cover, and a sealing component between the valve body and the upper valve cover. The sealing component includes a pressure ring, which is connected to the upper valve cover by a limiting bolt. One end of the pressure ring extends to a sealing block between the valve body and the upper valve cover. The pressure ring has a connecting hole. A limiting sleeve is fitted over the limiting bolt. The bottom of the limiting sleeve abuts against the upper valve cover, creating a gap between the pressure ring and the upper valve cover. When the upper valve cover is compressed, it moves toward the limiting bolt to press the sealing block.

[0006] This technical solution utilizes a mating structure of the pressure ring, limiting bolt, and sealing block. When the upper valve cover is under pressure, it automatically moves towards the limiting bolt, thus tightening the sealing block and significantly improving the sealing performance between the upper valve cover and the valve body. The gap structure between the pressure ring and the upper valve cover, formed by the limiting sleeve, effectively avoids the problem of insufficient bolt fixing strength caused by the large diameter of the ball valve. This prevents deformation of the upper valve cover under stress, ensuring reliable sealing. The gap between the pressure ring and the upper valve cover is adjustable by the length of the limiting sleeve, offering high flexibility and reducing the loosening and sealing failure issues that easily occur with traditional direct bolt fixing methods, thus extending the service life of the ball valve.

[0007] Preferably, a sealing groove is provided between the valve body and the upper valve cover, and the sealing block is disposed in the sealing groove and is wedge-shaped.

[0008] This technical solution utilizes a wedge-shaped sealing block design, which generates a self-locking effect under pressure, ensuring a tighter fit between the sealing block and the valve body and upper valve cover, thus enhancing the sealing effect. This is particularly suitable for sealing requirements under high pressure or large-diameter conditions. The wedge-shaped sealing block is automatically guided into the sealing groove during assembly, facilitating installation and disassembly, reducing assembly difficulty, and improving maintenance efficiency.

[0009] Furthermore, the sealing block is made of graphite.

[0010] This technical solution utilizes graphite material for the sealing block, which possesses excellent high and low temperature resistance, ensuring stable sealing performance of the ball valve even under extreme operating conditions. It is particularly suitable for applications involving liquefied gases and steam. Graphite material also exhibits good wear resistance and self-lubricating properties, reducing frictional resistance during valve stem or cover movement and extending service life.

[0011] Preferably, the upper valve cover is provided with a first step and a second step, the limiting bolt is connected to the first step, and the gap between the second step and the pressure ring is the same as the gap between the first step and the pressure ring.

[0012] This technical solution ensures that the gap between the second step and the pressure ring is the same as the gap between the first step and the pressure ring, allowing the pressure ring to maintain a uniform stress state during operation and preventing displacement or deformation caused by uneven stress. The double-step limiting structure effectively enhances the fit stability between the limiting bolt and the pressure ring, enabling the pressure ring to reliably apply pressure to the sealing block, thereby improving sealing performance.

[0013] Preferably, the pressure ring is fitted with a limiting ring, the bottom of the limiting ring is inclined, the valve body is provided with a mounting groove, the mounting groove is provided with a mounting block, and the mounting block abuts against the bottom of the limiting ring to form a limiting connection.

[0014] This technical solution utilizes the contact between the mounting block and the inclined surface at the bottom of the limiting ring to form a limiting connection, effectively preventing axial or radial displacement of the pressure ring during stress, thus further enhancing structural stability. The inclined design at the bottom of the limiting ring ensures that the pressure ring is guided to the correct position when subjected to external forces, thereby achieving a self-correcting function and preventing seal failure due to misalignment.

[0015] Furthermore, the pressure ring is provided with a fixing hole, and a fixing bolt is installed in the fixing hole. One end of the fixing bolt extends to the limiting ring and abuts against the end face of the limiting ring to restrict the axial movement of the limiting ring.

[0016] This technical solution effectively restricts the axial movement of the limiting ring, preventing displacement due to pressure or vibration, thereby improving the stability of the limiting structure. The abutment design between the fixing bolt and the limiting ring further enhances the overall connection strength between the pressure ring and the limiting ring, ensuring that the pressure ring maintains a stable stress state during operation and improving the sealing effect.

[0017] Furthermore, the outer surface of the mounting block is arc-shaped and made of an elastic material.

[0018] This technical solution allows for a more complete fit when the device comes into contact with the inclined surface at the bottom of the limiting ring. The mounting block is made of elastic material, which can deform under stress, thus buffering and absorbing impacts, effectively reducing hard impact wear between the limiting ring and the pressure ring, and extending service life.

[0019] Preferably, the valve body is made of casting.

[0020] This technical solution utilizes a casting process to manufacture the valve body, enabling the integrated molding of complex geometric structures. This reduces the number of parts, thereby lowering assembly difficulty and errors, and improving the overall structural stability of the valve body. The cast valve body possesses excellent mechanical strength and pressure resistance, capable of withstanding the forces exerted by large-diameter ball valves under high-pressure conditions, ensuring the reliability of the sealing structure.

[0021] The beneficial effects of this utility model are as follows: The cooperative structure of the pressure ring, limiting bolt, and sealing block can automatically move towards the limiting bolt when the upper valve cover is under pressure, thereby tightening the sealing block and significantly improving the sealing performance between the upper valve cover and the valve body. The gap structure formed between the pressure ring and the upper valve cover by the limiting sleeve effectively avoids the problem of insufficient bolt fixing strength caused by the large diameter of the ball valve, preventing deformation of the upper valve cover under stress and ensuring the reliability of the seal. The gap between the pressure ring and the upper valve cover can be adjusted by the length of the limiting sleeve, providing high flexibility and reducing the loosening and sealing failure phenomena that are prone to occur under traditional direct bolt fixing methods, thus extending the service life of the ball valve. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 yes Figure 1 Enlarged detail image;

[0025] Figure 3 This is a schematic diagram of the structure of this utility model;

[0026] Figure 4 yes Figure 2 Enlarged detail image;

[0027] In the diagram, 1. Valve body; 11. Medium inlet; 12. Medium outlet; 13. Sealing groove; 14. Mounting groove; 15. Mounting block; 2. Valve stem; 3. Valve core; 4. Upper valve cover; 41. First step; 42. Second step; 5. Sealing component; 51. Pressure ring; 511. Connecting hole; 512. Fixing hole; 52. Limit bolt; 53. Limit sleeve; 54. Fixing bolt; 55. Sealing block; 56. Limit ring. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figure 1-4The illustration shows an embodiment of a ball valve casting with sealing function according to this utility model. It includes a valve body 1, with a medium inlet 11 and a medium outlet 12 inside. The valve body 1 also includes a valve stem 2, a valve core 3, and an upper valve cover 4. A sealing component 5 is provided between the valve body 1 and the upper valve cover 4. The sealing component 5 includes a pressure ring 51, which is connected to the upper valve cover 4 via a limiting bolt 52. One end of the pressure ring 51 extends to abut against a sealing block 55 between the valve body 1 and the upper valve cover. The pressure ring 51 has a connecting hole 511. A limiting sleeve 53 is fitted over the limiting bolt 52, and the bottom of the limiting sleeve 53 abuts against the upper valve cover 4, creating a gap between the pressure ring 51 and the upper valve cover 4. When the upper valve cover 4 is compressed, it moves towards the limiting bolt 52, thereby pressing the sealing block 55.

[0032] Through this technical solution, the mating structure of the pressure ring 51, the limiting bolt 52, and the sealing block 55 allows the upper valve cover 4 to automatically move towards the limiting bolt 52 when under pressure, thereby tightening the sealing block 55 and significantly improving the sealing performance between the upper valve cover 4 and the valve body 1. The pressure ring 51 and the upper valve cover 4 form a gap structure through the limiting sleeve 53, effectively avoiding the problem of insufficient bolt fixing strength caused by the large diameter of the ball valve. This prevents the upper valve cover 4 from deforming under stress, ensuring the reliability of the seal. The gap between the pressure ring 51 and the upper valve cover 4 is adjustable by the length of the limiting sleeve 53, offering high flexibility and reducing the loosening and sealing failure phenomena that easily occur under traditional direct bolt fixing methods, thus extending the service life of the ball valve.

[0033] A sealing groove 13 is provided between the valve body 1 and the upper valve cover 4, and the sealing block 55 is disposed in the sealing groove 13. The sealing block 55 is wedge-shaped.

[0034] This technical solution utilizes a wedge-shaped sealing block 55, which generates a self-locking effect under pressure, ensuring a tighter fit between the sealing block 55 and the valve body 1 and upper valve cover 4, thus enhancing the sealing effect. This design is particularly suitable for sealing requirements under high pressure or large-diameter conditions. During assembly, the wedge-shaped sealing block 55 is automatically guided into the sealing groove 13, facilitating installation and disassembly, reducing assembly difficulty, and improving maintenance efficiency.

[0035] The sealing block 55 is made of graphite.

[0036] This technical solution utilizes graphite material for the sealing block 55, which possesses excellent high and low temperature resistance, ensuring stable sealing performance of the ball valve even under extreme operating conditions. It is particularly suitable for applications involving liquefied gases and steam. Graphite material also exhibits good wear resistance and self-lubricating properties, resulting in lower frictional resistance during the movement of the valve stem 2 or valve cover, thus extending its service life.

[0037] The upper valve cover 4 is provided with a first step 41 and a second step 42. The limiting bolt 52 is connected to the first step 41. The gap between the second step 42 and the pressure ring 51 is the same as the gap between the first step 41 and the pressure ring 51.

[0038] This technical solution ensures that the gap between the second step 42 and the pressure ring 51 is the same as the gap between the first step 41 and the pressure ring 51, allowing the pressure ring 51 to maintain a uniform stress state during the stress process and avoiding displacement or deformation caused by uneven stress. The double-step limiting structure effectively enhances the fit stability between the limiting bolt 52 and the pressure ring 51, enabling the pressure ring 51 to reliably apply pressure to the sealing block 55, thereby improving the sealing performance.

[0039] The pressure ring 51 is covered with a limiting ring 56. The bottom of the limiting ring 56 is inclined. The valve body 1 is provided with a mounting groove 14. The mounting groove 14 is provided with a mounting block 15. The mounting block 15 abuts against the bottom of the limiting ring 56 to form a limiting connection.

[0040] This technical solution utilizes the contact between the mounting block 15 and the inclined surface at the bottom of the limiting ring 56 to form a limiting connection, effectively preventing axial or radial displacement of the pressure ring 51 during stress, thus further enhancing the stability of the structure. The inclined design at the bottom of the limiting ring 56 allows the pressure ring 51 to be guided to the correct position when subjected to external force, thereby achieving a self-correcting function and avoiding sealing failure due to misalignment.

[0041] The pressure ring 51 is provided with a fixing hole 512, and a fixing bolt 54 is installed in the fixing hole 512. One end of the fixing bolt 54 extends to the limiting ring 56 and abuts against the end face of the limiting ring 56 to limit the axial movement of the limiting ring 56.

[0042] This technical solution effectively restricts the axial movement of the limiting ring 56, preventing displacement due to pressure or vibration, thereby improving the stability of the limiting structure. The abutment design between the fixing bolt 54 and the limiting ring 56 further enhances the overall connection strength between the pressure ring 51 and the limiting ring 56, ensuring that the pressure ring 51 maintains a stable stress state during operation and improving the sealing effect.

[0043] The mounting block 15 has an arc-shaped exterior and is made of an elastic material.

[0044] This technical solution enables a more complete fit when it comes into contact with the inclined surface at the bottom of the limiting ring 56. The mounting block 15 is made of elastic material, which can deform to a certain extent during the stress process, playing a role in buffering and absorbing impact, effectively reducing hard impact wear between the limiting ring 56 and the pressure ring 51, and extending service life.

[0045] The valve body 1 is made by casting.

[0046] Through this technical solution, the valve body 1 is manufactured using a casting process, enabling the integrated molding of complex geometric structures, reducing the number of parts, thereby lowering assembly difficulty and errors, and improving the overall structural stability of the valve body 1. The cast valve body 1 possesses excellent mechanical strength and pressure resistance, capable of withstanding the forces exerted by large-diameter ball valves under high-pressure conditions, ensuring the reliability of the sealing structure.

[0047] 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.

[0048] 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 ball valve casting with sealing function, characterized in that: The device includes a valve body with a medium inlet and a medium outlet. The valve body also includes a valve stem, a valve core, and an upper valve cover. A sealing component is provided between the valve body and the upper valve cover. The sealing component includes a pressure ring, which is connected to the upper valve cover via a limiting bolt. One end of the pressure ring extends to a sealing block between the valve body and the upper valve cover. The pressure ring has a connecting hole. A limiting sleeve is fitted over the limiting bolt, and the bottom of the limiting sleeve abuts against the upper valve cover, creating a gap between the pressure ring and the upper valve cover. When the upper valve cover is compressed, it moves towards the limiting bolt, thereby pressing the sealing block.

2. A ball valve casting with sealing function as described in claim 1, characterized in that: A sealing groove is provided between the valve body and the upper valve cover, and the sealing block is disposed in the sealing groove. The sealing block is wedge-shaped.

3. A ball valve casting with sealing function as described in claim 2, characterized in that: The sealing block is made of graphite.

4. A ball valve casting with sealing function as described in claim 1, characterized in that: The upper valve cover is provided with a first step and a second step. The limiting bolt is connected to the first step. The gap between the second step and the pressure ring is the same as the gap between the first step and the pressure ring.

5. A ball valve casting with sealing function as described in claim 1, characterized in that: The pressure ring is fitted with a limiting ring, the bottom of which is inclined. The valve body is provided with a mounting groove, and a mounting block is provided in the mounting groove. The mounting block abuts against the bottom of the limiting ring to form a limiting connection.

6. A ball valve casting with sealing function as described in claim 5, characterized in that: The pressure ring is provided with a fixing hole, and a fixing bolt is installed in the fixing hole. One end of the fixing bolt extends to the limiting ring and abuts against the end face of the limiting ring to restrict the axial movement of the limiting ring.

7. A ball valve casting with sealing function as described in claim 5, characterized in that: The mounting block has an arc-shaped exterior and is made of an elastic material.

8. A ball valve casting with sealing function as described in claim 1, characterized in that: The valve body is made by casting.

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