Wear-resistant and corrosion-resistant valve seat assembly

Abstract

The utility model discloses a wear-resistant and corrosion-resistant valve seat assembly, which belongs to the technical field of valves and comprises a valve seat body, a wear-resistant layer and a corrosion-resistant layer are arranged on the inner side of the valve seat body, a connecting pipe is fixedly communicated with the bottom of the valve seat body, an annular threaded sleeve is arranged on the outer side of the connecting pipe, and a valve rod is arranged on the annular threaded sleeve. A bottom cover is arranged at the bottom of the connecting pipe, inserting rods are fixedly installed on the left side and the right side of the top of the bottom cover, positioning bolts are arranged on the left side and the right side of an annular threaded sleeve, and a filter plate is fixedly installed in an inner cavity of the valve seat body. According to the valve seat assembly, the abrasion resistance and the corrosion resistance of the valve seat assembly are effectively improved, the valve seat assembly can adapt to various complex working conditions, the service life of the valve seat is greatly prolonged, operation is easy and fast in the mounting and dismounting process, the maintenance efficiency can be improved, and the maintenance cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a wear-resistant and corrosion-resistant valve seat assembly. Background Technology

[0002] In industrial production, valves, as key components for controlling the flow of fluid media, are widely used in many fields such as petroleum, chemical, power, and metallurgy. The valve seat, as an important part of the valve, is in direct contact with the fluid media and is subjected to the scouring, corrosion, and frequent opening and closing friction of the media. However, existing valve seat assemblies have many problems in practical use.

[0003] Existing devices are mostly made of a single material, which has limited wear and corrosion resistance. When conveying corrosive media, such as acidic or alkaline liquids, the valve seat is easily corroded, leading to a decrease in sealing performance and fluid leakage. This not only wastes resources but may also pose a threat to the environment and production safety. Furthermore, it is inconvenient to clean and maintain the inside of the valve seat body, hindering rapid repair and maintenance. Therefore, we propose a wear-resistant and corrosion-resistant valve seat assembly to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a wear-resistant and corrosion-resistant valve seat assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wear-resistant and corrosion-resistant valve seat assembly includes a valve seat body, the inner side of which is provided with a wear-resistant layer and a corrosion-resistant layer. A connecting pipe is fixedly connected to the bottom of the valve seat body, an annular threaded sleeve is provided on the outer side of the connecting pipe, and a bottom cover is provided at the bottom of the connecting pipe. Insert rods are fixedly installed on the left and right sides of the top of the bottom cover. Positioning bolts are provided on the left and right sides of the annular threaded sleeve. A filter plate is fixedly installed in the inner cavity of the valve seat body.

[0007] Preferably, the wear-resistant layer is fixedly installed on the inner wall of the valve seat body, and the corrosion-resistant layer covers the outer side of the wear-resistant layer.

[0008] Preferably, a valve stem is fixedly installed on the right side of the top of the valve seat body, and the bottom of the valve stem extends into the inner cavity of the valve seat body and is fixedly connected to a baffle.

[0009] Preferably, the right side of the positioning bolt on the left and the left side of the positioning bolt on the right both have threads that penetrate the annular threaded sleeve and extend into the interior of the bottom cover. A sealing gasket is provided on the top of the bottom cover, and the top of the insertion rod penetrates the sealing gasket and extends into the interior of the connecting rod.

[0010] Preferably, the inner side of the annular threaded sleeve is rotatably connected to the outer side of the connecting pipe, and the outer side of the bottom cover is threadedly connected to the inner wall of the annular threaded sleeve.

[0011] Preferably, flanges are fixedly installed on both the left and right sides of the outer side of the valve seat body, and threaded holes are opened on the outer side of the flanges on both the left and right sides. There are four sets of threaded holes, which are distributed in a ring array.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The composite structure design of the wear-resistant layer and the corrosion-resistant layer in this utility model effectively improves the wear resistance and corrosion resistance of the valve seat assembly, enabling it to adapt to various complex working conditions and greatly extending the service life of the valve seat.

[0014] 2. In this utility model, by rotating the positioning bolts in the forward direction, the positioning bolts on the left and right sides move away from each other. When the positioning bolts move away from the connecting pipe, the annular threaded sleeve rotates in the forward direction. The annular threaded sleeve drives the bottom cover that is screwed to it to move downward. The bottom cover drives the insertion rod to move downward, so that the insertion rod moves away from the connecting pipe. Then, the bottom cover and the sealing gasket are removed in sequence. The operation is simple and quick during installation and disassembly, which can improve maintenance efficiency and reduce maintenance costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a wear-resistant and corrosion-resistant valve seat assembly proposed in this utility model.

[0016] Figure 2 This is a bottom sectional view of a wear-resistant and corrosion-resistant valve seat assembly proposed in this utility model.

[0017] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0018] In the diagram: 1. Valve seat body; 2. Flange; 3. Connecting pipe; 4. Wear-resistant layer; 5. Corrosion-resistant layer; 6. Filter plate; 7. Annular threaded sleeve; 8. Valve stem; 9. Bottom cover; 10. Insert rod; 11. Sealing gasket; 12. Positioning bolt; 13. Baffle; 14. Threaded hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-3A wear-resistant and corrosion-resistant valve seat assembly includes a valve seat body 1, with a wear-resistant layer 4 and a corrosion-resistant layer 5 disposed on the inner side of the valve seat body 1, a connecting pipe 3 fixedly connected to the bottom of the valve seat body 1, an annular threaded sleeve 7 disposed on the outer side of the connecting pipe 3, a bottom cover 9 disposed at the bottom of the connecting pipe 3, and insert rods 10 fixedly installed on the left and right sides of the top of the bottom cover 9, positioning bolts 12 disposed on the left and right sides of the annular threaded sleeve 7, and a filter plate 6 fixedly installed in the inner cavity of the valve seat body 1.

[0021] In this embodiment, the wear-resistant layer 4 is fixedly installed on the inner wall of the valve seat body 1, and the corrosion-resistant layer 5 covers the outer side of the wear-resistant layer 4. A layer of wear-resistant material, such as a tungsten carbide coating, is applied to the surface of the valve seat body 1 in contact with the fluid via a thermal spraying process. Tungsten carbide has extremely high hardness and wear resistance, effectively resisting fluid erosion and extending the service life of the valve seat body 1. The thickness of the wear-resistant layer 4 is rationally designed according to actual working conditions, generally between 0.5 and 2 mm. A corrosion-resistant metal or alloy, such as a nickel-phosphorus alloy, is deposited on the surface of the wear-resistant layer 4 using a chemical plating method. Nickel-phosphorus alloys have good corrosion resistance, effectively resisting the erosion of various corrosive media and protecting the internal wear-resistant layer 4 and the valve seat body 1. The thickness of the corrosion-resistant layer 5 is typically controlled between 0.05 and 0.2 mm. Within millimeters, it can ensure good corrosion resistance without affecting the overall performance of the valve seat body 1. A valve stem 8 is fixedly installed on the right side of the top of the valve seat body 1. The bottom of the valve stem 8 extends into the inner cavity of the valve seat body 1 and is fixedly connected to a baffle 13.

[0022] In this embodiment, the right side of the left positioning bolt 12 and the left side of the right positioning bolt 12 both thread through the annular threaded sleeve 7 and extend into the interior of the bottom cover 9. A sealing gasket 11 is provided on the top of the bottom cover 9. The top of the insertion rod 10 passes through the sealing gasket 11 and extends into the interior of the connecting rod. The insertion rod 10 can limit the bottom cover 9, improving the installation stability of the bottom cover 9. The sealing gasket 11 improves the sealing effect of the bottom cover 9 and prevents fluid leakage.

[0023] In this embodiment, the inner side of the annular threaded sleeve 7 is rotatably connected to the outer side of the connecting pipe 3, and the outer side of the bottom cover 9 is threadedly connected to the inner wall of the annular threaded sleeve 7. Flanges 2 are fixedly installed on both the left and right sides of the outer side of the valve seat body 1. Threaded holes 14 are opened on the outer side of the flanges 2 on both the left and right sides. There are four sets of threaded holes 14, which are arranged in a ring array. The threaded holes 14 opened on the outer side of the flanges 2 make it easy to accurately determine the installation position of the valve seat body 1 and ensure that the valve seat body 1 will not be displaced after installation. The threaded holes 14 are used to fix the valve seat body 1 to the external pipe with external bolts.

[0024] In this embodiment, during use, the valve seat body 1 is installed and fixed by the flanges 2 on the left and right sides. By rotating the valve stem 8, the baffle 13 can be rotated to adjust the flow rate of the liquid inside the valve seat body 1. When it is necessary to clean the inside of the valve seat body 1, the positioning bolts 12 on the left and right sides are moved away from each other by rotating the positioning bolts 12 in the forward direction. When the positioning bolts 12 are away from the connecting pipe 3, the annular threaded sleeve 7 is rotated in the forward direction. The annular threaded sleeve 7 drives the bottom cover 9, which is screwed to it, to move downward. The bottom cover 9 drives the insertion rod 10 to move downward, so that the insertion rod 10 is away from the connecting pipe 3. Then, the bottom cover 9 and the sealing gasket 11 are removed in sequence to clean the inside of the valve seat body 1.

[0025] The above provides a detailed description of the wear-resistant and corrosion-resistant valve seat assembly provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A wear-resistant and corrosion-resistant valve seat assembly, comprising a valve seat body (1), characterized in that: The valve seat body (1) is provided with a wear-resistant layer (4) and a corrosion-resistant layer (5) on its inner side. The bottom of the valve seat body (1) is fixedly connected to a connecting pipe (3). The outer side of the connecting pipe (3) is provided with an annular threaded sleeve (7). The bottom of the connecting pipe (3) is provided with a bottom cover (9). The left and right sides of the top of the bottom cover (9) are fixedly installed with insert rods (10). The left and right sides of the annular threaded sleeve (7) are provided with positioning bolts (12). The inner cavity of the valve seat body (1) is fixedly installed with a filter plate (6).

2. The wear-resistant and corrosion-resistant valve seat assembly according to claim 1, characterized in that: The wear-resistant layer (4) is fixedly installed on the inner wall of the valve seat body (1), and the corrosion-resistant layer (5) covers the outer side of the wear-resistant layer (4).

3. The wear-resistant and corrosion-resistant valve seat assembly according to claim 1, characterized in that: A valve stem (8) is fixedly installed on the right side of the top of the valve seat body (1). The bottom of the valve stem (8) extends into the inner cavity of the valve seat body (1) and is fixedly connected to a baffle (13).

4. The wear-resistant and corrosion-resistant valve seat assembly according to claim 1, characterized in that: The right side of the positioning bolt (12) on the left and the left side of the positioning bolt (12) on the right are both threaded through the annular threaded sleeve (7) and threaded to the inside of the bottom cover (9). A sealing gasket (11) is provided on the top of the bottom cover (9). The top of the insertion rod (10) passes through the sealing gasket (11) and extends to the inside of the connecting rod.

5. The wear-resistant and corrosion-resistant valve seat assembly according to claim 1, characterized in that: The inner side of the annular threaded sleeve (7) is rotatably connected to the outer side of the connecting pipe (3), and the outer side of the bottom cover (9) is threadedly connected to the inner wall of the annular threaded sleeve (7).

6. The wear-resistant and corrosion-resistant valve seat assembly according to claim 1, characterized in that: Flanges (2) are fixedly installed on both the left and right sides of the valve seat body (1). Threaded holes (14) are opened on the outer sides of the flanges (2) on both the left and right sides. There are four sets of threaded holes (14) and they are arranged in a ring array.

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