Anti-crystallization corrosion-resistant wear-resistant ball valve

Abstract

The utility model discloses an anti-crystallization corrosion-resistant wear-resistant ball valve which comprises a valve body, a valve rod and a ceramic ball body, a shaft hole is formed in the upper end of the valve body, and the valve rod penetrates through the shaft hole, extends into the valve body and is in linkage connection with the ceramic ball body. The positions, corresponding to the two sides of the ceramic ball body, in the valve body are each provided with a ceramic valve seat abutting against the ceramic ball body. The ceramic ball valve further comprises an upper valve seat, the upper valve seat is arranged on the periphery of the valve rod in a sleeving mode, and the two ends of the upper valve seat abut against the inner wall of the valve body and the surface of the ceramic ball body respectively, so that the inner space of the upper valve seat is separated from an inner cavity of the valve body. A ceramic middle body sleeve is arranged on the inner wall of the valve body, an inner hole for the upper valve seat to penetrate through is formed in the upper end of the ceramic middle body sleeve, and an electric heating wire is installed on the ceramic middle body sleeve. The check valve can prevent media from being crystallized to block the valve core, can also prevent the media from being in contact with the metal valve rod, and has the advantages of being anti-crystallization and anti-corrosion.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a ball valve that is anti-crystallization, corrosion-resistant, and wear-resistant. Background Technology

[0002] Currently, in the chemical industry, ceramic ball valves are commonly used in corrosive and abrasive pipelines. However, when the medium contains solutions such as sodium chloride and copper sulfate, crystals are easily formed in the pipeline and valve cavity, which seriously hinders the opening and closing of the valve and may even cause the brittle ceramic ball to break and be damaged.

[0003] Furthermore, while the ceramic lining of ordinary ceramic ball valves is resistant to strong corrosion, the medium can still enter the valve cavity and come into contact with the metal valve stem when the ball is partially open. Corrosion-resistant metals such as Hastelloy, Monel, and titanium cannot withstand high temperatures and high concentrations of sulfuric acid and hydrochloric acid.

[0004] Therefore, how to ensure that the ceramic lining of the valve can completely isolate the medium from the metal material and avoid jamming caused by crystallization during opening and closing has become a technical problem that urgently needs to be solved in the industry. Utility Model Content

[0005] The purpose of this invention is to provide a ball valve that is anti-crystallization, corrosion-resistant, and wear-resistant. This invention can prevent the medium from crystallizing and jamming the valve core, and can also isolate the medium from contacting the metal valve stem, thus having the advantages of anti-crystallization and anti-corrosion.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an anti-crystallization, corrosion-resistant, and wear-resistant ball valve, comprising a valve body, a valve stem, and a ceramic ball. The valve body has a shaft hole at its upper end, and the valve stem extends through the shaft hole into the valve body and is linked to the ceramic ball. A ceramic valve seat is installed in the valve body at a position corresponding to both sides of the ceramic ball, and is tightly abutted against the ceramic ball. The valve body also includes an upper valve seat, which is sleeved on the outer periphery of the valve stem, and both ends of the upper valve seat are tightly abutted against the inner wall of the valve body and the surface of the ceramic ball, respectively, so that the internal space of the upper valve seat is separated from the internal cavity of the valve body.

[0007] By adopting the above technical solution and adding an upper valve seat, the internal space of the upper valve seat is separated from the internal cavity of the valve body, isolating the medium from contact with the valve stem, so that the metal material has no chance to react chemically with the highly corrosive fluid, thus giving the valve excellent corrosion resistance.

[0008] The present invention is further configured such that a ceramic inner sleeve is provided on the inner wall of the valve body, the upper end of the ceramic inner sleeve is provided with an inner hole for the upper valve seat to pass through, and an electric heating wire is installed on the ceramic inner sleeve.

[0009] By adopting the above technical solution, the ceramic inner sleeve can make the inner wall of the valve body corrosion resistant. The addition of an electric heating wire can maintain a constant temperature in the valve cavity after the heating wire is energized, preventing crystallization and solidification caused by the cooling of the medium.

[0010] The present invention is further configured such that multiple axial channels for installing heating wires are distributed in a circumferential array between the outer circular surface of the ceramic inner body and the inner circular surface of the valve body, and the multiple axial channels are interconnected. The bottom of the valve body is provided with an inlet channel connected to one of the axial channels.

[0011] By adopting the above technical solution, it is not only easy to install the heating wire, but also the heating wire is evenly distributed, which can make the heating in the valve cavity uniform and improve the anti-crystallization effect.

[0012] The present invention is further configured such that the valve body includes a middle body and end valve covers connected to both ends of the middle body by fasteners, and the ceramic middle body is sleeved on the inner circular surface of the middle body.

[0013] By adopting the above technical solution, the valve body has a split and detachable structure, which facilitates the disassembly and assembly of internal components.

[0014] The present invention is further configured such that an outwardly extending limiting flange is provided on the outer circular surface of the ceramic valve seat, the outer circular surface of the limiting flange is closely fitted with the inner circular surface of the ceramic inner body sleeve, and the end of the limiting flange away from the ceramic sphere abuts against the inner end face of the end valve cover to form a limiting fit.

[0015] By adopting the above technical solution, when installing the end valve cover, the end valve cover can directly press the ceramic valve seat onto the surface of the ceramic ball, making the installation operation very convenient.

[0016] The present invention is further configured such that a ceramic flange sleeve is provided on the inner circular surface of the end valve cover, and the ceramic flange sleeve is tightly fitted with the corresponding ceramic valve seat.

[0017] By adopting the above technical solution, the inner wall of the end valve cover can be made to have anti-corrosion properties.

[0018] The present invention is further configured such that a first sealing ring is provided between the upper valve seat and the ceramic middle body sleeve, a second sealing ring is provided between the ceramic valve seat and the ceramic middle body sleeve, and a third sealing ring is provided between the ceramic valve seat and the ceramic flange sleeve.

[0019] By adopting the above technical solution, the sealing between the ceramic components can be guaranteed, and the chemical reaction between the internal highly corrosive fluid and the metal components can be avoided.

[0020] The present invention is further configured to include a packing sealing assembly, which includes a packing pressure plate, a packing sleeve, and a sealing packing, which are sequentially sleeved on the outer periphery of the valve stem from top to bottom. The packing pressure plate is connected to the upper end of the valve body by fasteners. The packing pressure plate acts on the packing sleeve, causing the packing sleeve to press the sealing packing into the shaft hole. The upper end of the upper valve seat extends into the shaft hole and abuts against the sealing packing.

[0021] By adopting the above technical solution, reliable sealing performance between the valve stem and the valve body can be guaranteed, and the upper valve seat can also be positioned and installed during passage.

[0022] The present invention is further configured such that an annular limiting part is provided on the outer periphery of the valve stem, and an annular limiting groove that fits the annular limiting part is provided between the packing pressure plate and the packing pressure sleeve.

[0023] By adopting the above technical solution, the valve stem can be axially limited, allowing it to rotate only in the circumferential direction. Attached Figure Description

[0024] Figure 1 This is a first sectional view of the entire utility model.

[0025] Figure 2 This is a second sectional view of the entire utility model.

[0026] In the diagram: 1. Valve body; 2. Valve stem; 3. Ceramic ball; 4. Shaft hole; 5. Ceramic valve seat; 6. Upper valve seat; 7. Ceramic inner body sleeve; 8. Inner hole; 9. Heating wire; 10. Axial channel; 11. Inlet channel; 12. Middle body; 13. End valve cover; 14. Limiting flange; 15. Ceramic flange sleeve; 16. First sealing ring; 17. Second sealing ring; 18. Third sealing ring; 19. Packing pressure plate; 20. Packing pressure sleeve; 21. Sealing packing; 22. Annular limiting part; 23. Annular limiting groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: As attached Figure 1 and attached Figure 2The anti-crystallization, corrosion-resistant, and wear-resistant ball valve shown includes a valve body 1, a valve stem 2, and a ceramic ball 3. The valve body 1 has a shaft hole 4 at its upper end. The valve stem 2 extends through the shaft hole 4 into the valve body 1 and is linked to the ceramic ball 3. A ceramic valve seat 5 is installed inside the valve body 1, corresponding to both sides of the ceramic ball 3, and abuts against the ceramic ball 3. The ball valve also includes an upper valve seat 6, which can be made of ceramic material. The upper valve seat 6 has a sleeve-like structure and is fitted around the outer circumference of the valve stem 2. Both ends of the upper valve seat 6 abut against the inner wall of the valve body 1 and the surface of the ceramic ball 3, respectively, thus separating the internal space of the upper valve seat 6 from the inner cavity of the valve body 1. The addition of the upper valve seat 6, which separates its internal space from the inner cavity of the valve body 1, isolates the medium from the valve stem 2, preventing the metal material (valve stem 2) from chemically reacting with the highly corrosive fluid, thereby giving the valve excellent corrosion resistance.

[0029] As attached Figure 1 As shown, the inner wall of the valve body 1 is provided with a ceramic inner body 12 sleeve 7. The upper end of the ceramic inner body 12 sleeve 7 is provided with an inner hole 8 for the upper valve seat 6 to pass through. More specifically, the inner end of the inner hole 8 of the ceramic inner body 12 sleeve 7 has a limiting groove, and the outer periphery of the upper valve seat 6 has a step that forms a limiting fit with the inner end of the limiting groove. An electric heating wire 9 is installed on the ceramic inner body 12 sleeve 7. The ceramic inner body 12 sleeve 7 enables the inner wall of the valve body 1 to have anti-corrosion properties. The addition of the electric heating wire 9, after the electric heating wire 9 is energized, can maintain a constant temperature in the valve cavity and prevent crystallization and solidification caused by the cooling of the medium.

[0030] As attached Figure 1 and attached Figure 2 As shown, multiple axial channels 10 for mounting heating wires 9 are arranged in a circumferential array between the outer circular surface of the ceramic body 12 set 7 and the inner circular surface of the valve body 1, and these multiple axial channels 10 are interconnected. A wire inlet channel 11 is provided at the bottom of the valve body 1, which is connected to one of the axial channels 10. The wire inlet channel 11 allows a wire to pass through and connect to the heating wire 9. The wire is connected to an external power source to power the heating wire 9. The axial channels 10 can be located on the outer circular surface of the ceramic body 12 set 7, or on the inner circular surface of the valve body 1, or partially on the outer circular surface of the ceramic body 12 set 7 and partially on the inner circular surface of the valve body 1. This design not only facilitates the installation of the heating wires 9, but also ensures that the heating wires 9 are evenly distributed, resulting in uniform heating within the valve cavity and improving the anti-crystallization effect.

[0031] As attached Figure 1 As shown, the valve body 1 includes a middle body 12 and end valve covers 13 connected to both ends of the middle body 12 by fasteners (such as bolts). The ceramic middle body 12 sleeve 7 is disposed on the inner circular surface of the middle body 12. This not only facilitates the installation of the heating wire 9, but also ensures that the heating wire 9 is evenly distributed, enabling uniform heating within the valve cavity and improving the anti-crystallization effect.

[0032] As attached Figure 1 As shown, the outer circular surface of the ceramic valve seat 5 is provided with an outwardly extending limiting flange 14. The outer circular surface of the limiting flange 14 is in close contact with the inner circular surface of the ceramic body 12 sleeve 7. The end of the limiting flange 14 away from the ceramic ball 3 abuts against the inner end face of the end valve cover 13 to form a limiting fit. When installing the end valve cover 13, the end valve cover 13 can directly press the ceramic valve seat 5 onto the spherical surface of the ceramic ball 3, making the installation operation very convenient.

[0033] As attached Figure 1 As shown, a ceramic flange sleeve 15 is provided on the inner circular surface of the end valve cover 13. The ceramic flange sleeve 15 fits tightly with the corresponding ceramic valve seat 5. That is, a groove is provided on the inner circular surface of the ceramic flange sleeve 15 near the inner end for the outer end of the ceramic valve seat 5 to be inserted, so that the inner diameter of the ceramic valve seat 5 is approximately the same as the inner diameter of the ceramic flange sleeve 15. This design enables the inner wall of the end valve cover 13 to have corrosion resistance.

[0034] As attached Figure 1 As shown, a first sealing ring 16 is provided between the upper valve seat 6 and the ceramic middle body 12 sleeve 7, a second sealing ring 17 is provided between the ceramic valve seat 5 and the ceramic middle body 12 sleeve 7, and a third sealing ring 18 is provided between the ceramic valve seat 5 and the ceramic flange sleeve 15. This design can ensure the sealing performance between the ceramic components and prevent the strong corrosive fluid inside from reacting chemically with the metal components.

[0035] As attached Figure 1 As shown, the ball valve also includes a packing seal assembly, which comprises a packing pressure plate 19, a packing sleeve 20, and a sealing packing 21, which are sequentially fitted around the outer periphery of the valve stem 2 from top to bottom. The packing pressure plate 19 is connected to the upper end of the valve body 1 by fasteners. The packing pressure plate 19 acts on the packing sleeve 20, causing the packing sleeve 20 to press the sealing packing 21 tightly into the shaft hole 4. The upper end of the upper valve seat 6 extends into the shaft hole 4 and abuts against the sealing packing 21. This design ensures reliable sealing performance between the valve stem 2 and the valve body 1, and also allows for the positioning and installation of the upper valve seat 6 during operation.

[0036] As attached Figure 1 As shown, the valve stem 2 has an annular limiting part 22 on its outer periphery, and an annular limiting groove 23 that fits into the annular limiting part 22 is provided between the packing pressure plate 19 and the packing pressure sleeve 20. This design can achieve axial limiting of the valve stem 2, so that it can only rotate circumferentially.

Claims

1. A ball valve for preventing crystallization, corrosion, and wear, comprising a valve body (1), a valve stem (2), and a ceramic ball (3), wherein the upper end of the valve body (1) is provided with a shaft hole (4), the valve stem (2) extends through the shaft hole (4) into the valve body (1) and is linked to the ceramic ball (3), and a ceramic valve seat (5) is respectively installed in the valve body (1) at positions corresponding to both sides of the ceramic ball (3) and abuts against the ceramic ball (3); characterized in that: It also includes an upper valve seat (6), which is sleeved on the outer periphery of the valve stem (2), and the two ends of the upper valve seat (6) are respectively abutted against the inner wall of the valve body (1) and the surface of the ceramic ball (3), so that the internal space of the upper valve seat (6) is separated from the inner cavity of the valve body (1); a ceramic middle body sleeve (7) is provided on the inner wall of the valve body (1), and the upper end of the ceramic middle body sleeve (7) is provided with an inner hole (8) for the upper valve seat (6) to pass through, and an electric heating wire (9) is installed on the ceramic middle body sleeve (7).

2. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 1, characterized in that: The outer circular surface of the ceramic inner sleeve (7) and the inner circular surface of the valve body (1) are arranged in a circumferential array with multiple axial channels (10) for installing heating wires (9), and the multiple axial channels (10) are interconnected. The bottom of the valve body (1) is provided with an inlet channel (11) that is connected to one of the axial channels (10).

3. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 1, characterized in that: The valve body (1) includes a middle body (12) and end valve covers (13) connected to both ends of the middle body (12) by fasteners. The ceramic middle body sleeve (7) is disposed on the inner circular surface of the middle body (12).

4. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 3, characterized in that: The outer circular surface of the ceramic valve seat (5) is provided with an outwardly extending limiting flange (14). The outer circular surface of the limiting flange (14) is closely fitted with the inner circular surface of the ceramic inner body sleeve (7). The end of the limiting flange (14) away from the ceramic ball (3) abuts against the inner end face of the end valve cover (13) to form a limiting fit.

5. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 3, characterized in that: The inner circular surface of the end valve cover (13) is provided with a ceramic flange sleeve (15), which is in close contact with the corresponding ceramic valve seat (5).

6. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 5, characterized in that: A first sealing ring (16) is provided between the upper valve seat (6) and the ceramic inner sleeve (7), a second sealing ring (17) is provided between the ceramic valve seat (5) and the ceramic inner sleeve (7), and a third sealing ring (18) is provided between the ceramic valve seat (5) and the ceramic flange sleeve (15).

7. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 1, characterized in that: It also includes a packing seal assembly, which includes a packing pressure plate (19), a packing sleeve (20) and a sealing packing (21) that are sequentially sleeved on the outer periphery of the valve stem (2) from top to bottom. The packing pressure plate (19) is connected to the upper end of the valve body (1) by fasteners. The packing pressure plate (19) acts on the packing sleeve (20) to cause the packing sleeve (20) to press the sealing packing (21) into the shaft hole (4). The upper end of the upper valve seat (6) extends into the shaft hole (4) and abuts against the sealing packing (21).

8. The anti-crystallization, corrosion-resistant, and wear-resistant ball valve according to claim 7, characterized in that: The valve stem (2) is provided with an annular limiting part (22) on its outer periphery, and an annular limiting groove (23) that fits the annular limiting part (22) is provided between the packing pressure plate (19) and the packing pressure sleeve (20).

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