High-temperature-resistant and wear-resistant valve seat structure with self-cleaning function

Abstract

A high-temperature-resistant and abrasion-resistant valve seat structure with a self-cleaning function comprises a gate plate, a valve seat, a valve body and a valve seat supporting ring, and the valve seat supporting ring is fixedly connected to the valve body in the direction of a flow channel. An annular groove is machined in the end face of the valve seat supporting ring, and a spring seat, a spring, a thrust pad and a sealing ring are sequentially installed in the annular groove. The front end of the sealing ring and the axial tail of the valve seat are connected in a meshed mode through a V-shaped structure, and the radial periphery of the valve seat is connected with the inner wall of the valve seat supporting ring through a V-shaped structure. The front end face of the valve seat is in contact sealing with the flashboard. The high-temperature solid dust conveying device is safer and more reliable in the process of conveying high-temperature solid dust media.

Description

Technical Field

[0001] This utility model relates to the field of valve manufacturing technology, specifically a high-temperature and wear-resistant valve seat structure with self-cleaning function. Background Technology

[0002] In the petrochemical industry, high-temperature solid powder media are transported using valves that are resistant to high temperatures and wear. However, during operation, these valves suffer from severe wear on the sealing surface due to media deposition, leading to valve seal failure; media deposition in the spring cavity causes spring failure; and solid slag deposits within the valve body prevent the valve from opening and closing. To address these problems, it is necessary to develop a valve seat structure that is structurally sound, has a long service life, is safe and reliable, resistant to high temperatures and wear, and possesses a self-cleaning function. Utility Model Content

[0003] This utility model provides a high-temperature and wear-resistant valve seat structure with self-cleaning function, which effectively solves the problems of high-temperature solid slag medium depositing on the gate plate surface and damaging the gate plate sealing surface, and high-temperature solid slag medium depositing in the valve seat spring cavity and causing spring failure and valve sealing damage. At the same time, it solves the problem of high-temperature solid slag medium entering the valve body cavity and causing the valve to be unable to open and close normally.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-temperature and wear-resistant valve seat structure with self-cleaning function includes a gate, a valve seat, and a valve body. The valve seat support ring is fixed to the valve body along the flow channel direction. An annular groove is machined on the end face of the valve seat support ring, and a spring seat, a spring, a thrust washer, and a sealing ring are sequentially installed in the annular groove. The front end of the sealing ring and the axial tail end of the valve seat are interlocked by a V-shaped structure, and the radial outer periphery of the valve seat is connected to the inner wall of the valve seat support ring by a V-shaped structure.

[0006] A dustproof ring is installed between the valve seat support ring and the valve seat.

[0007] The space between the valve seat support ring and the inner wall of the valve body is filled with heat insulation material.

[0008] The gate is provided with guard plates on both sides; the guard plates are fixed to the radial outer wall of the valve seat, and a guard plate support is installed between the guard plates. The guard plate support and the guard plates are fastened by studs, nuts and disc springs.

[0009] The gate moves along the guide rail, which is located at the front and rear of the valve body flow channel in the vertical direction and is fixed to the valve body cavity.

[0010] The cross-sectional shape of the gate channel is V-shaped.

[0011] The beneficial effects of this invention are: it makes the process of conveying high-temperature solid powder media safer and more reliable. The valve seat with a self-cleaning function allows the gate to effectively remove media deposited on the sealing surface during opening and closing through its V-shaped pointed structure, thus achieving a reliable sealing effect. The guard plate structure forms a sealed channel with the gate, completely blocking the media within the valve flow path, and the guard plate support effectively fixes the guard plate, preventing deformation. This invention effectively solves the following problems: high-temperature solid slag media depositing on the gate surface damages the gate sealing surface; high-temperature solid slag media depositing in the valve seat spring cavity causes spring failure and damages the valve seal; high-temperature solid slag media entering the valve body cavity prevents the valve from opening and closing normally. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Top view;

[0014] Figure 3 This is a schematic diagram of the valve seat of this utility model;

[0015] Figure 4 This utility model Figure 1 Left view;

[0016] In the diagram: 1-gate, 2-valve body, 3-valve seat support ring, 4-valve seat, 5-guard plate, 6-valve stem, 7-guide rail, 8-guard plate support seat, 9-stud, 10-nut, 11-disc spring, 12-spring seat, 13-spring, 14-thrust washer, 15-sealing ring, 16-dustproof ring, 17-heat insulation material, 18-V-type. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1 , Figure 3A high-temperature and wear-resistant valve seat with self-cleaning function mainly includes a valve body 2, a valve seat 4, a gate 1, and a valve stem 6. One end of the valve stem 6 is connected to the gate 1. The gate 1 and the valve seat 4 installed at the inlet and outlet of the flow channel of the valve body 2 constitute a valve sealing pair. It also includes a valve seat support ring 3, which is fixed to the valve body 2 along the flow channel direction. An annular groove is machined on the end face of the valve seat support ring 3, and a spring seat 12, a spring 13, a thrust washer 14, and a sealing ring 15 are sequentially installed in the annular groove. The sealing ring 15 is compressed by the spring 13 and the medium pressure, causing the inner and outer walls of the sealing ring 15 to tightly adhere to the annular groove of the valve seat support ring 3, forming a seal. The spring 13 is protected from malfunction due to medium deposition within the closed space formed by the sealing ring 15 and the annular groove of the valve seat support ring 3. The front end of the sealing ring 15 and the axial tail end of the valve seat 4 are interlocked by a V-shaped structure, and the radial outer circumference of the valve seat 4 is connected to the inner wall of the valve seat support ring 3 by a V-shaped structure. It can effectively remove deposits adhering to the inner wall of the valve seat support ring 3. The front end face of the valve seat 4 contacts and seals with the gate 1.

[0019] A dustproof ring 16 is installed between the valve seat support ring 3 and the valve seat 4 to prevent the medium from entering the gap formed between the valve seat 4 and the valve seat support ring 3.

[0020] The valve seat support ring 3 and the inner wall of the valve body 2 are filled with heat insulation material 17. The heat insulation material 17 can effectively prevent the high temperature of the flow channel of the valve body 2 from being conducted to the outer wall of the valve body 2.

[0021] Reference Figure 1 , Figure 2 and Figure 4 The gate 1 has protective plates 5 on both sides. These protective plates 5 are fixed to the radial outer wall of the valve seat 4. After fixing, the surfaces of the valve seat, protective plates, and gate contact ends are machined and ground together to ensure flatness requirements, allowing for a better fit with the gate and preventing the medium from leaking out through gaps. The protective plates 5 and gate 1 seal the flow channel of the valve body 2, completely preventing the medium in the flow channel of the valve body 2 from flowing into the central cavity of the valve body 2. A protective plate support 8 is installed between the protective plates 5 at the inlet and outlet positions of the flow channel. The protective plate support 8 and the protective plates 5 are fastened together by studs 9, nuts 10, and disc springs 11. This prevents deformation of the protective plates 5 at high temperatures.

[0022] Please refer to the figure. Figure 2 , Figure 4 The gate 1 moves along the guide rail 7, which is located at the front and rear of the flow channel of the valve body 2 in the vertical direction and is fixed to the middle cavity of the valve body 2. It guides the opening and closing process of the gate 2.

[0023] Please see Figure 1 The gate 1 has a V-shaped channel cross-section of 18. During the opening and closing process, the gate 1 can effectively remove surface deposits and prevent damage to the sealing surface.

Claims

1. A high-temperature and wear-resistant valve seat structure with self-cleaning function, comprising a gate, a valve seat, and a valve body, characterized in that, The valve seat support ring (3) is fixed to the valve body (2) along the flow channel direction. The valve seat support ring (3) has an annular groove machined on its end face. The spring seat (12), spring (13), thrust pad (14), and sealing ring (15) are installed in the annular groove in sequence. The front end of the sealing ring (15) and the axial tail end of the valve seat (4) are connected to each other by a V-shaped structure. The radial outer periphery of the valve seat (4) is connected to the inner wall of the valve seat support ring (3) by a V-shaped structure.

2. The high-temperature and wear-resistant valve seat structure with self-cleaning function according to claim 1, characterized in that, A dustproof ring (16) is installed between the valve seat support ring (3) and the valve seat (4).

3. The high-temperature and wear-resistant valve seat structure with self-cleaning function according to claim 1, characterized in that, The valve seat support ring (3) and the inner wall of the valve body (2) are filled with heat insulation material (17).

4. The high-temperature and wear-resistant valve seat structure with self-cleaning function according to claim 1, characterized in that, The gate (1) is provided with guard plates (5) on both sides; the guard plates (5) are fixed to the radial outer wall of the valve seat (4), and a guard plate support seat (8) is installed between the guard plates (5). The guard plate support seat (8) and the guard plates (5) are fastened by studs (9), nuts (10) and disc springs (11).

5. The high-temperature and wear-resistant valve seat structure with self-cleaning function according to claim 1, characterized in that, The gate (1) moves along the guide rail (7), which is located at the front and rear of the flow channel of the valve body (2) in the vertical direction and is fixed to the middle cavity of the valve body (2).

6. A high-temperature and wear-resistant valve seat structure with self-cleaning function according to any one of claims 1-5, characterized in that, The cross-sectional shape of the gate (1) is V-shaped (18).

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