High-temperature oxygen fixing ball valve

Abstract

The utility model relates to the technical field of valves, in particular to a high-temperature oxygen fixing ball valve, which is characterized in that a runner is arranged in a valve body, and two valve covers are respectively connected with the valve body; the ball body is arranged in the flow channel, a through hole is formed in the ball body, and the ball body rotates in the flow channel so that the through hole can be aligned with the flow channel opening in the valve cover or the side wall of the ball body blocks the flow channel opening in the valve cover; the bottom end of the valve rod penetrates through a through hole in the valve body and then is fixed to the ball. The periphery of the valve rod is sleeved with the gland. The packing assembly is arranged between the inner wall of the top of the gland and the side wall of the valve rod. The top of the gland extends towards the top end of the valve rod so that the packing assembly can be away from the valve body. The outer sealing assembly comprises two oxygen-resistant pure metal soft gaskets and a metal graphite spiral wound gasket arranged between the two oxygen-resistant pure metal soft gaskets. The top of the gland extends towards the top end of the valve rod so that the packing assembly can be far away from the valve body, a certain distance exists between the packing assembly and the valve body, and then the high-temperature influence of a high-temperature medium in the valve body on the packing assembly can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a high-temperature oxygen fixed ball valve. Background Technology

[0002] High-temperature conditions are extremely common in the complex processes of chemical systems. As a key component controlling oxygen flow, the high-temperature oxygen ball valve's operating status directly affects the stability and safety of the entire production system. Oxygen itself is a combustion-supporting substance, and its oxidizing power increases exponentially when exposed to high temperatures.

[0003] Under these high-temperature conditions, the seals of high-temperature oxygen ball valves face severe challenges. General sealing materials maintain good sealing performance under normal temperature conditions. However, once exposed to a high-temperature oxidizing atmosphere, their internal molecular structure changes rapidly. Common rubber seals, for example, age faster, harden, and become brittle at high temperatures, leading to a severe decline in sealing performance within a short period. This decreased sealing performance not only causes oxygen leakage, making it difficult to accurately control oxygen concentration during chemical reactions, affecting reaction efficiency and product quality, but it can also trigger serious safety accidents such as fires or even explosions, causing incalculable losses to chemical companies.

[0004] Therefore, developing a high-temperature oxygen ball valve that can operate stably and reliably in a high-temperature oxygen environment and effectively solve the problem of seal failure caused by high temperature is an urgent need for the chemical industry to break through current technical bottlenecks and ensure safe production. Utility Model Content

[0005] In view of this, the present invention provides a high-temperature oxygen ball valve to solve the problem of seal failure caused by high temperature.

[0006] In a first aspect, this utility model provides a high-temperature oxygen ball valve, comprising:

[0007] The valve body includes a valve body and two valve covers. The valve body has a flow channel, and the two valve covers are respectively connected to the valve body and are located at both ends of the flow channel.

[0008] A sphere is disposed inside the flow channel. The sphere has a through hole. The sphere rotates inside the flow channel to align the through hole with the flow channel opening on the valve cover, or to block the flow channel opening on the valve cover with the side wall of the sphere.

[0009] A valve stem, the bottom end of which passes through a through hole in the valve body and is fixed to the ball, and the other end of the valve stem extends out of the valve body and is adapted to be connected to an operating mechanism;

[0010] A pressure cap has an internal through hole, and the pressure cap is fitted around the valve stem through the internal through hole. The bottom of the pressure cap is fixed to the valve body.

[0011] A packing assembly is disposed between the inner wall of the top of the gland and the side wall of the valve stem, wherein the top of the gland extends toward the tip of the valve stem to keep the packing assembly away from the valve body;

[0012] Several external sealing components, the external sealing components including two oxygen-resistant pure metal soft gaskets and a metal-graphite wound gasket disposed between the two oxygen-resistant pure metal soft gaskets; the external sealing components are disposed between the valve body and the two valve covers and between the valve body and the gland.

[0013] In the above structure, the top of the gland extends towards the top of the valve stem to keep the packing assembly away from the valve body, creating a certain distance between the packing assembly and the valve body. This reduces the high-temperature impact of the high-temperature medium inside the valve body on the packing assembly. Simultaneously, the external sealing assembly includes two oxygen-resistant pure metal gaskets and a metal-graphite spiral wound gasket positioned between them. The two oxygen-resistant pure metal gaskets, made of materials such as pure copper or Monel, are primarily used to isolate oxygen, reducing the oxidation of the intermediate metal-graphite spiral wound gasket by oxygen. This improves the external sealing performance and service life of the high-temperature oxygen valve, enhancing safety.

[0014] In one optional embodiment, the valve body is provided with an external sealing component mounting groove, the groove wall of which is stepped, and an oxygen-resistant pure metal gasket is disposed on the stepped groove wall in the external sealing component.

[0015] In one alternative embodiment, the two oxygen-resistant pure metal pads are aligned, and the metal graphite wound pad is offset from the two oxygen-resistant pure metal pads.

[0016] In one alternative embodiment, the high-temperature oxygen ball valve further includes a bracket fixed to the valve body, the top of the bracket being adapted to be fixed to the operating mechanism and to provide support for the operating mechanism.

[0017] In the above structure, the upper end of the valve stem extends out of the valve body and connects to the operating mechanism. A bracket is installed between the valve body and the operating mechanism, allowing the torque of the operating mechanism to be directly transmitted to the valve body through the bracket, reducing the impact of high temperature on the operating mechanism. In this embodiment, the bracket is directly fixed to the valve body with bolts.

[0018] In one alternative embodiment, the bracket is fixed to the valve body with bolts.

[0019] In one alternative embodiment, the high-temperature oxygen ball valve further includes a pivot, the ball being connected to the valve body via the pivot, and the ball being configured to rotate relative to the pivot.

[0020] In one alternative embodiment, the top of the pivot passes through the valve body and is movably connected to a slot at the bottom of the ball.

[0021] In one alternative embodiment, the pivot is bolted to the valve body.

[0022] In one alternative embodiment, the high-temperature oxygen ball valve further includes a plurality of bearing components disposed between the top of the pivot and the groove at the bottom of the ball, and between the valve stem and the valve body.

[0023] In one optional embodiment, the bearing component is a metal bearing with a thickness ≥10mm.

[0024] The high-temperature oxygen ball valve provided by this utility model has the following advantages:

[0025] 1. The high-temperature oxygen ball valve provided by this utility model includes a valve body, two valve covers, a ball, a valve stem, a gland, a packing assembly, and several external sealing assemblies. The valve body has a flow channel. The two valve covers are respectively connected to the valve body and are located at opposite ends of the flow channel. The ball is disposed inside the flow channel and has a through hole. The ball rotates inside the flow channel to align the through hole with the flow channel opening on the valve cover, or to block the flow channel opening on the valve cover with the side wall of the ball. The bottom end of the valve stem passes through the through hole on the valve body and is fixed to the ball. The other end of the valve stem... The valve extends out of the valve body and is suitable for connection with the operating mechanism; the gland has a through hole inside, and the gland is fitted around the valve stem through the through hole, with the bottom of the gland fixed to the valve body; the packing assembly is located between the inner wall of the top of the gland and the side wall of the valve stem, and the top of the gland extends towards the top of the valve stem to keep the packing assembly away from the valve body; the external sealing assembly includes two oxygen-resistant pure metal soft gaskets and a metal-graphite spiral wound gasket located between the two oxygen-resistant pure metal soft gaskets; the external sealing assembly is located between the valve body and the two valve covers and between the valve body and the gland.

[0026] This high-temperature oxygen ball valve features a gland that extends towards the top of the valve stem to keep the packing assembly away from the valve body. This creates a distance between the packing assembly and the valve body, reducing the impact of the high-temperature medium inside the valve body on the packing assembly. The external sealing assembly includes two oxygen-resistant pure metal gaskets and a metal-graphite spiral wound gasket positioned between them. The two oxygen-resistant pure metal gaskets, made of materials such as pure copper or Monel, are primarily used to isolate oxygen, reducing the oxidation of the intermediate metal-graphite spiral wound gasket by oxygen. This improves the external sealing performance and service life of the high-temperature oxygen valve, enhancing its safety.

[0027] 2. The high-temperature oxygen ball valve provided by this utility model also includes a bracket, which is fixed to the valve body. The top of the bracket is adapted to be fixed to the operating mechanism and to provide support for the operating mechanism.

[0028] In this high-temperature oxygen ball valve, the upper end of the valve stem extends out of the valve body and connects to the operating mechanism. A bracket is installed between the valve body and the operating mechanism, allowing the torque of the operating mechanism to be directly transmitted to the valve body through the bracket, thus reducing the impact of high temperature on the operating mechanism. In this embodiment, the bracket is directly fixed to the valve body with bolts. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic structural view of the high-temperature oxygen fixed ball valve provided in an embodiment of this utility model;

[0031] Figure 2 for Figure 1 Enlarged view of the structure at point A in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Valve body;

[0034] 2-Valve cover;

[0035] 3-sphere;

[0036] 4-Valve stem;

[0037] 5-Capping;

[0038] 6-Packaging assembly;

[0039] 7-External sealing assembly; 71-Oxygen-resistant pure metal soft gasket; 72-Metal graphite spiral wound gasket;

[0040] 8-Staff;

[0041] 9-Pivot;

[0042] 10-Bearing components. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] High-temperature conditions are extremely common in the complex processes of chemical systems. As a key component controlling oxygen flow, the high-temperature oxygen ball valve's operating status directly affects the stability and safety of the entire production system. Oxygen itself is a combustion-supporting substance, and its oxidizing power increases exponentially when exposed to high temperatures.

[0047] Under these high-temperature conditions, the seals of high-temperature oxygen ball valves face severe challenges. General sealing materials maintain good sealing performance under normal temperature conditions. However, once exposed to a high-temperature oxidizing atmosphere, their internal molecular structure changes rapidly. Common rubber seals, for example, age faster, harden, and become brittle at high temperatures, leading to a severe decline in sealing performance within a short period. This decreased sealing performance not only causes oxygen leakage, making it difficult to accurately control oxygen concentration during chemical reactions, affecting reaction efficiency and product quality, but it can also trigger serious safety accidents such as fires or even explosions, causing incalculable losses to chemical companies.

[0048] Therefore, this embodiment provides a high-temperature oxygen ball valve, such as... Figure 1 and Figure 2As shown, the valve includes a valve body 1, two valve covers 2, a ball 3, a valve stem 4, a gland 5, a packing assembly 6, and several external sealing assemblies 7. The valve body 1 has a flow channel. The two valve covers 2 are connected to the valve body 1, and are located at opposite ends of the flow channel. The ball 3 is located inside the flow channel and has a through hole. The ball 3 rotates inside the flow channel to align the through hole with the flow channel opening on the valve cover 2, or to block the flow channel opening on the valve cover 2 with its sidewall. The bottom end of the valve stem 4 passes through the through hole in the valve body 1 and is fixed to the ball 3. The other end of the valve stem 4 extends out of the valve body 1 and is adapted to... The operating mechanism is connected; the pressure cap 5 has a through hole inside, and the pressure cap 5 is sleeved around the valve stem 4 through its internal through hole, and the bottom of the pressure cap 5 is fixed to the valve body 1; the packing assembly 6 is located between the inner wall of the top of the pressure cap 5 and the side wall of the valve stem 4, and the top of the pressure cap 5 extends towards the top of the valve stem 4 so that the packing assembly 6 is away from the valve body 1; the outer sealing assembly 7 includes two oxygen-resistant pure metal soft gaskets 71 and a metal graphite spiral wound gasket 72 located between the two oxygen-resistant pure metal soft gaskets 71; the outer sealing assembly 7 is located between the valve body 1 and the two valve covers 2 and between the valve body 1 and the pressure cap 5.

[0049] In this embodiment, the top of the gland 5 extends towards the top of the valve stem 4 to keep the packing assembly 6 away from the valve body 1, thus forming a shape like... Figure 1 The packing assembly 6 shown is spaced apart from the valve body 1, which reduces the high-temperature impact of the high-temperature medium inside the valve body 1 on the packing assembly 6. Simultaneously, an external sealing assembly 7 is provided, including two oxygen-resistant pure metal gaskets 71 and a metal-graphite spiral wound gasket 72 positioned between the two oxygen-resistant pure metal gaskets 71. The two oxygen-resistant pure metal gaskets 71, made of materials such as pure copper or Monel, are primarily used to isolate oxygen, reducing the oxidation of the intermediate metal-graphite spiral wound gasket 72 by oxygen, thus improving the external sealing performance and service life of the high-temperature oxygen valve and enhancing safety. The packing assembly 6 is a commonly used structure in valves, and this embodiment adopts an existing structure.

[0050] In this embodiment, the valve body 1 is provided with an external sealing component mounting groove, the groove wall of which is stepped, and the oxygen-resistant pure metal soft gasket 71 in the external sealing component 7 is disposed on the stepped groove wall.

[0051] like Figure 2As shown, taking the external sealing assembly 7 between the valve body 1 and the valve cover 2 as an example, the external sealing assembly 7 is placed inside the external sealing assembly mounting groove on the valve body 1. The groove wall of the external sealing assembly mounting groove is stepped. Similarly, the valve cover 2 is also provided with a protrusion for insertion into the external sealing assembly mounting groove. The shape of this protrusion matches the shape of the groove wall of the external sealing assembly mounting groove. By setting the groove wall of the external sealing assembly mounting groove to be stepped, the oxygen-resistant pure metal soft gasket 71 can be abutted by the stepped groove wall during installation. The metal graphite spiral wound gasket 72 is placed on the bottom wall of the external sealing assembly mounting groove to fix the metal graphite spiral wound gasket 72 between the two oxygen-resistant pure metal soft gaskets 71.

[0052] In this embodiment, as Figure 2 As shown, two oxygen-resistant pure metal pads 71 ​​are aligned, while a metal-graphite wound pad 72 is offset from the two oxygen-resistant pure metal pads 71. That is... Figure 2 As shown, the two oxygen-resistant pure metal soft pads 71 ​​are on the same plane, and the metal graphite spiral wound pad 72 is set closer to the valve body than the two oxygen-resistant pure metal soft pads 71, so that the two oxygen-resistant pure metal soft pads 71 ​​do not contact the metal graphite spiral wound pad 72.

[0053] In this embodiment, the bottom end of the pressure cap 5 is fixed to the valve body 1 by bolts, and the external sealing component 7 between the pressure cap 5 and the valve body 1 is also installed in the manner described above, that is, an external sealing component mounting groove is also provided on the wall surface where the valve body 1 and the pressure cap 5 abut.

[0054] In this embodiment, as Figure 1 As shown, the high-temperature oxygen ball valve also includes a bracket 8, which is fixed to the valve body 1. The top of the bracket 8 is adapted to be fixed to the operating mechanism and provides support for the operating mechanism. The upper end of the valve stem 4 extends out of the valve body 1 and connects to the operating mechanism. By setting the bracket 8 between the valve body 1 and the operating mechanism, the torque of the operating mechanism is directly transmitted to the valve body 1 through the bracket 8, reducing the impact of high temperature on the operating mechanism. In this embodiment, the bracket 8 is directly fixed to the valve body 1 by bolts.

[0055] In this embodiment, the high-temperature oxygen ball valve also includes a pivot 9, and the ball 3 is connected to the valve body 1 via the pivot 9, and the ball 3 is configured to rotate relative to the pivot 9.

[0056] like Figure 1As shown, the ball 3 is located inside the flow channel, and the through hole on the ball 3 is aligned with the flow channel openings on the two valve covers 2 to achieve communication between the pipes on both sides of the valve body 1. By rotating the valve stem 4, the valve stem 4 drives the ball 3 to rotate, thereby causing the side wall of the ball 3 to block the flow channel openings on the valve cover 2, achieving the closure of the pipes on both sides of the valve body 1. In this embodiment, to facilitate the rotation of the ball 3, a pivot 9 is provided on the valve body 1, and the pivot 9 is movably connected to the ball 3, allowing the ball 3 to rotate relative to the pivot 9.

[0057] like Figure 1 As shown, the upper part of the pivot 9 is axial, and the top end of the pivot 9 passes through the valve body 1 and is inserted into the groove at the bottom of the ball 3. The top end of the pivot 9 is movably connected to the groove at the bottom of the ball 3 so that the ball 3 can rotate relative to the pivot 9.

[0058] like Figure 1 As shown, the bottom of the pivot 9 is fixed to the valve body 1 by bolts, and an external sealing assembly 7 is also provided between the pivot 9 and the valve body 1 to achieve sealing at the contact point between the pivot 9 and the valve body 1.

[0059] In this embodiment, the high-temperature oxygen ball valve also includes two bearing components 10. One bearing component 10 is located between the top of the pivot 9 and the groove at the bottom of the ball 3, and the other bearing component 10 is located between the valve stem 4 and the valve body 1. Since the ball 3 needs to rotate relative to the pivot 9, and the valve stem 4 needs to rotate relative to the valve body 1, bearing components 10 are provided between the top of the pivot 9 and the groove at the bottom of the ball 3, and between the valve stem 4 and the valve body 1, to facilitate rotation. In this embodiment, the bearing component 10 is made of integral hard nickel-based alloy with a thickness ≥10mm, improving safety performance.

[0060] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high temperature oxygen ball valve characterized by, The utility model relates to a valve, including: Valve body (1) and two valve covers (2), the valve body (1) is equipped with flow channel inside, two valve covers (2) are connected with valve body (1) respectively, and two valve covers (2) are at two ends of flow channel respectively; Ball (3) is equipped in flow channel inside, ball (3) is equipped with through -hole on it, ball (3) rotates in flow channel inside to make through -hole align with flow channel mouth on valve cover (2) or make ball (3) side wall block flow channel mouth on valve cover (2); Valve stem (4), the bottom end of valve stem (4) is fixed with ball (3) after penetrating through the through -hole on valve body (1), the other end of valve stem (4) is stretched out valve body (1) and is suitable for being connected with operating mechanism; Gland (5), it is equipped with through -hole inside, gland (5) is set in valve stem (4) circumferential side through its inside through -hole, and the bottom of gland (5) is fixed with valve body (1); Filler assembly (6) is equipped between the inner wall of the top of gland (5) and the side wall of valve stem (4), and the top of gland (5) extends to the top end of valve stem (4) to make filler assembly (6) away from valve body (1); Several outer sealing assemblies (7), the outer sealing assembly (7) includes two oxygen -resistant pure metal soft gasket (71) and metal graphite winding gasket (72) between two oxygen -resistant pure metal soft gasket (71); Outer sealing assembly (7) is arranged between valve body (1) and two valve covers (2) and between valve body (1) and gland (5).

2. The high temperature oxygen ball valve of claim 1, wherein, The valve body (1) is provided with an outer sealing assembly mounting groove, the groove wall of the outer sealing assembly mounting groove is in a stepped shape, and the oxygen-resistant pure metal soft gasket (71) in the outer sealing assembly (7) is arranged on the stepped groove wall.

3. The high temperature oxygen ball valve of claim 2, wherein, The two oxygen-resistant pure metal soft gaskets (71) are arranged in alignment, and the metal graphite winding gasket (72) is arranged in dislocation with the two oxygen-resistant pure metal soft gaskets (71).

4. The high-temperature oxygen ball valve of claim 1, wherein, It also includes a bracket (8), the bracket (8) is fixed with the valve body (1), and the top end of the bracket (8) is suitable for being fixed with the operating mechanism and providing support for the operating mechanism.

5. The high temperature oxygen ball valve of claim 4, wherein, The bracket (8) and the valve body (1) are fixed by bolts.

6. The high-temperature oxygen ball valve of claim 1, wherein, It also includes a pivot (9), the ball (3) is connected with the valve body (1) through the pivot (9), and the ball (3) is configured to rotate relative to the pivot (9).

7. The high-temperature oxygen ball valve of claim 6, wherein, The top end of the pivot (9) penetrates the valve body (1) and is movably connected with the notch of the bottom of the ball (3).

8. The high-temperature oxygen ball valve of claim 7, wherein, The pivot (9) and the valve body (1) are fixed by bolts.

9. The high-temperature oxygen ball valve of claim 7, wherein, It also includes several bearing parts (10), which are arranged between the top end of the pivot (9) and the notch of the bottom of the ball (3) and between the valve stem (4) and the valve body (1).

10. The high-temperature oxygen ball valve of claim 9, wherein, The bearing part (10) is a metal bearing, and the thickness of the bearing part (10) is greater than or equal to 10 mm.

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