High-temperature-resistant top-mounted integral bevel ball valve

Abstract

The utility model discloses a high-temperature-resistant top-mounted integral inclined surface ball valve which comprises a valve body, a ball body, a valve seat, a valve rod and a valve cover, the valve cover covers the valve body, and the valve rod is arranged in the valve cover in a penetrating mode and connected with the ball body. Inclined planes for mounting the valve seat are arranged on flow channels on the left and right sides of the valve body; the vertical distances between the inclined planes and the central line of the valve rod are gradually reduced from the upper end to the lower end; the valve seat is made of metal; a valve seat pressing ring groove parallel to the inclined face is formed in the valve body, the valve seat pressing ring groove is formed between the valve body and the valve seat, the valve seat pressing ring groove is used for installing a sealing assembly, and the sealing assembly is parallel to the inclined face. The ball body is arranged between the valve seats, and the valve seats are attached to the upper spherical surface and the lower spherical surface of the ball body. According to the utility model, the inclined plane sealing design, the elastic compensation structure and the top-mounted maintenance are adopted, so that the problem of online maintenance of the traditional ball valve and the risk of deformation of the conventional top-mounted ball valve under high pressure and high temperature are solved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a high-temperature resistant top-mounted integral inclined ball valve. Background Technology

[0002] In existing technologies, traditional floating ball valves adopt a side-mounted split structure. If the pipeline needs to be inspected, it needs to be disassembled from the pipeline, which can lead to long downtime and high labor costs, which is unacceptable, especially in critical fields such as petrochemicals and long-distance pipelines. Conventional top-mounted ball valves mostly have a flat seat design, which is prone to heat deformation and sealing failure at high temperatures. Summary of the Invention

[0003] According to an embodiment of the present utility model, a high-temperature resistant top-mounted integral inclined ball valve is provided, comprising a valve body, a ball, a valve seat, a valve stem, and a valve cover, wherein the valve cover is disposed on the valve body, and the valve stem passes through the valve cover and is connected to the ball;

[0004] The flow channels on the left and right sides of the valve body are provided with inclined surfaces for valve seat installation. The vertical distance between the inclined surfaces and the center line of the valve stem gradually decreases from the top to the bottom.

[0005] The valve seat is made of metal;

[0006] The valve body is provided with a valve seat pressure ring groove parallel to the inclined plane. The valve seat pressure ring groove is located between the valve body and the valve seat. The valve seat pressure ring groove is used to install the sealing assembly. The sealing assembly is parallel to the inclined plane.

[0007] The flow channel end face of the sphere is parallel to the inclined plane, and the sphere is placed between the valve seats, with the upper and lower spherical surfaces of the valve seats fitting together with the sphere.

[0008] Furthermore, the sealing assembly includes: a valve seat pressure ring, a graphite ring, and a disc spring;

[0009] The valve seat pressure ring, graphite ring, and disc spring are sequentially bonded together and embedded in the valve seat pressure ring groove;

[0010] The valve seat pressure ring and graphite ring are pressed and adhered to the valve seat.

[0011] Furthermore, a pressure ring is provided inside the valve body, which presses against the valve seat. The cross-section of the pressure ring is shaped like the number 7.

[0012] Furthermore, a spring is fitted at the lower end of the valve stem, with the two ends of the spring abutting against the valve stem and the ball respectively, and the spring is used to provide preload.

[0013] Furthermore, a metal bearing and a bushing are provided between the valve stem and the valve cover, and the metal bearing and bushing are located at the shoulder of the valve stem.

[0014] Furthermore, it also includes: sealing packing, pressure sleeve, and pressure plate;

[0015] The sealing packing is placed between the valve stem and the valve cover;

[0016] The compression sleeve is pressed onto the sealing packing;

[0017] The pressure plate presses onto the pressure sleeve and is connected to the valve cover.

[0018] Furthermore, the pressure plate is connected to the valve cover via studs and nuts.

[0019] The high-temperature resistant top-mounted integral inclined ball valve according to the present invention adopts an inclined sealing design, an elastic compensation structure, and top-mounted maintenance, which solves the problem of online maintenance of traditional ball valves and the risk of deformation of conventional top-mounted ball valves under high pressure and high temperature.

[0020] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of a high-temperature resistant top-mounted integral inclined ball valve according to an embodiment of the present utility model;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Reference numerals: 1. Valve body; 2. Valve cover; 3. Ball; 4. Valve stem; 5. Valve seat; 6. Graphite ring; 7. Valve seat pressure ring; 8. Disc spring; 9. Pressure ring; 10. Metal bearing; 11. Bushing; 12. Sealing packing; 13. Pressure sleeve; 14. Pressure plate; 15. Stud; 16. Nut; 17. Spring. Detailed Implementation

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0025] First, combine Figures 1-2 The present invention describes a high-temperature resistant, top-mounted, integral inclined ball valve according to an embodiment of the present invention, which is used in long-distance pipelines and has a wide range of applications.

[0026] like Figures 1-2 As shown, the high-temperature resistant top-mounted integral inclined ball valve of this utility model includes a valve body 1, a ball 3, a valve seat 5, a valve stem 4, and a valve cover 2. The valve cover 2 is placed on the valve body 1, and the valve stem 4 passes through the valve cover 2 and is connected to the ball 3. The valve stem 4 drives the ball 3 to rotate to connect and disconnect the pipeline.

[0027] Specifically, such as Figures 1-2As shown, in this embodiment, the flow channels on both sides of the valve body 1 are provided with inclined surfaces for installing the valve seat 5. The vertical distance between the inclined surfaces and the center line of the valve stem 4 gradually decreases from the top to the bottom, that is, the inclined surfaces of the flow channels on both sides are cone-shaped with upward opening. The valve seat 5 is made of metal and can be used in high temperature and high pressure conditions. The valve body 1 is provided with a valve seat pressure ring 7 groove parallel to the inclined surface. The valve seat pressure ring 7 groove is located between the valve body 1 and the valve seat 5. The valve seat pressure ring 7 groove is used to install the sealing component, which is parallel to the inclined surface. The flow channel end face of the ball 3 is parallel to the inclined surface. The ball 3 is located between the valve seat 5 and the upper and lower spherical surfaces of the valve seat 5 and the ball 3 are in contact. In this embodiment, the inclined surfaces between the valve seat 5 and the ball 3 and the sealing component cooperate to generate a self-tightening effect. As the medium pressure increases, the sealing surface clamping force increases, effectively preventing leakage, which is especially suitable for high pressure or high and low temperature conditions. The inclined surface in the valve body 1 facilitates the direct disassembly and assembly of the ball 3 and the valve seat 5 from the top of the valve body 1, improving valve maintenance efficiency and facilitating maintenance.

[0028] Furthermore, such as Figures 1-2 As shown, in this embodiment, the sealing assembly includes: a valve seat pressure ring 7, a graphite ring 6, and a disc spring 8; the valve seat pressure ring 7, the graphite ring 6, and the disc spring 8 are sequentially bonded together and embedded in the groove of the valve seat pressure ring 7; the valve seat pressure ring 7 and the graphite ring 6 are bonded and pressed onto the valve seat 5, and a hard seal is achieved through the disc spring 8 and the graphite ring 6, which can absorb and compensate for high temperature thermal expansion, resist temperature shock, improve sealing performance and durability, and is suitable for high temperature and high pressure conditions.

[0029] Furthermore, such as Figure 1 As shown, in this embodiment, a pressure ring 9 is provided inside the valve body 1. The pressure ring 9 presses against the valve seat 5. The cross-section of the pressure ring 9 is shaped like the number 7. The pressure ring 9 fixes the valve seat 5 in the valve cavity by mechanically pressing, preventing the valve seat 5 from shifting upward or loosening, ensuring that the sealing surfaces of the valve seat 5 and the ball 3 are always aligned, maintaining a seal, compensating for wear, and extending the valve's lifespan. When maintaining the valve, it is not necessary to disassemble the entire valve; the valve seat 5 and the ball 3 can be easily removed simply by taking out the pressure ring 9.

[0030] Furthermore, such as Figure 1 As shown, in this embodiment, a spring 17 is sleeved on the lower end of the valve stem 4. The two ends of the spring 17 abut against the valve stem 4 and the ball 3 respectively. The spring 17 is used to provide preload force, which can make the ball 3 fit better with the valve seat 5 and ensure sealing. When the sealing surface of the valve seat 5 is worn and a gap is generated between it and the ball 3, due to its inclined surface design, the sealing surface is automatically compensated and compressed under the action of the spring force to ensure reliable sealing.

[0031] Furthermore, such as Figure 1As shown, in this embodiment, a metal bearing 10 and a bushing 11 are provided between the valve stem 4 and the valve cover 2. The metal bearing 10 and the bushing 11 are located at the shoulder of the valve stem 4. The metal bearing 10 can withstand high temperature to prevent the valve stem 4 from flying out and ensure safety. The bushing 11 makes the centering of the valve stem 4 rotation better, improves the sealing performance and reduces the torque.

[0032] Furthermore, such as Figure 1 As shown, this embodiment further includes: a sealing packing 12, a pressure sleeve 13, and a pressure plate 14; the sealing packing 12 is disposed between the valve stem 4 and the valve cover 2; the pressure sleeve 13 presses onto the sealing packing 12; the pressure plate 14 presses onto the pressure sleeve 13 and is connected to the valve cover 2. By separately configuring the pressure sleeve 13 and the pressure plate 14, the packing is uniformly compressed. In this embodiment, the pressure plate 14 is connected to the valve cover 2 by studs 15 and nuts 16 to prevent loosening caused by thermal vibration, making it suitable for high-temperature and high-pressure conditions.

[0033] Above, refer to Figures 1-2 This invention describes a high-temperature resistant top-mounted integral inclined ball valve according to an embodiment of the present invention. It adopts an inclined sealing design, an elastic compensation structure, and top-mounted maintenance, which solves the problem of online maintenance of traditional ball valves and the risk of deformation of conventional top-mounted ball valves under high pressure and high temperature.

[0034] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0035] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A high-temperature resistant, top-mounted, integral inclined ball valve, comprising a valve body, a ball, a valve seat, a valve stem, and a valve cover, wherein the valve cover is disposed on the valve body, and the valve stem passes through the valve cover and is connected to the ball, characterized in that, The flow channels on the left and right sides of the valve body are provided with inclined surfaces for mounting the valve seat, and the vertical distance between the inclined surfaces and the center line of the valve stem gradually decreases from the upper end to the lower end; The valve seat is made of metal; The valve body is provided with a valve seat pressure ring groove parallel to the inclined surface. The valve seat pressure ring groove is disposed between the valve body and the valve seat. The valve seat pressure ring groove is used to install a sealing assembly. The sealing assembly is parallel to the inclined surface. The flow channel end face of the sphere is parallel to the inclined plane, the sphere is disposed between the valve seats, and the valve seats are in contact with the upper and lower spherical surfaces of the sphere; The sealing assembly includes: a valve seat pressure ring, a graphite ring, and a disc spring; The valve seat pressure ring, the graphite ring, and the disc spring are sequentially bonded together and embedded in the valve seat pressure ring groove; The valve seat pressure ring and the graphite ring are pressed together on the valve seat.

2. The high-temperature resistant top-mounted integral inclined ball valve as described in claim 1, characterized in that, The valve body is provided with a pressure ring, which presses against the valve seat. The cross-section of the pressure ring is shaped like the number 7.

3. The high-temperature resistant top-mounted integral inclined ball valve as described in claim 1, characterized in that, A spring is fitted at the lower end of the valve stem, and the two ends of the spring abut against the valve stem and the ball, respectively. The spring is used to provide preload.

4. The high-temperature resistant top-mounted integral inclined ball valve as described in claim 1, characterized in that, A metal bearing and a bushing are provided between the valve stem and the valve cover, and the metal bearing and the bushing are located at the shoulder of the valve stem.

5. The high-temperature resistant top-mounted integral inclined ball valve as described in claim 1, characterized in that, It also includes: sealing packing, pressure sleeve, and pressure plate; The sealing packing is disposed between the valve stem and the valve cover; The compression sleeve is pressed onto the sealing packing; The pressure plate presses onto the pressure sleeve and is connected to the valve cover.

6. The high-temperature resistant top-mounted integral inclined ball valve as described in claim 5, characterized in that, The pressure plate is connected to the valve cover by studs and nuts.

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