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 high-temperature solid dust medium conveying process.

Description

Technical Field

[0001] The invention relates to the technical field of valve manufacturing, in particular to a high-temperature-resistant and wear-resistant valve seat structure with a self-cleaning function. Background Art

[0002] In the process of conveying high-temperature solid powder media in the petrochemical field, a high-temperature and wear-resistant valve is needed to control it. During the use of the valve, the sealing surface is severely worn due to the deposition of media on the sealing surface, and the valve seal fails; the spring cavity is deposited with media, causing the spring to fail; and during the use of the valve, solid slag is deposited in the body cavity, causing the valve to be unable to open and close. In view of the existing problems, it is necessary to develop a valve seat structure with reasonable structure, long service life, safety and reliability, high temperature resistance, wear resistance and self-cleaning function. Summary of the invention

[0003] The present invention provides a high-temperature and wear-resistant valve seat structure with a self-cleaning function, which effectively solves the problem that high-temperature solid slag media is deposited on the surface of the gate plate to damage the gate plate sealing surface and that high-temperature solid slag media is deposited in the valve seat spring cavity, causing spring failure and damaging the valve seal. At the same time, it solves the problem that high-temperature solid slag media enters the valve body cavity, causing the valve to be unable to open and close normally.

[0004] To achieve the above object, the present invention provides the following technical solutions: A high-temperature and wear-resistant valve seat structure with a self-cleaning function, comprising a gate, a valve seat, a valve body, and a valve seat support ring, which is fixed to the valve body along the flow direction; an annular groove is processed on the end face of the valve seat support ring, and a spring seat, a spring, a thrust washer, and a sealing ring are installed in the annular groove in sequence; the front end of the sealing ring and the axial tail of the valve seat are interlocked and connected with each other through 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.

[0005] A dust ring is installed between the valve seat support ring and the valve seat.

[0006] The space between the valve seat support ring and the inner wall of the valve body is filled with heat insulation material.

[0007] Guard plates are arranged on both sides of the gate plate; the guard plates are fixedly connected to the radial outer wall of the valve seat, and guard plate support seats are installed between the guard plates. The guard plate support seats and the guard plates are fastened by studs, nuts and disc springs.

[0008] The gate plate moves along a guide rail, which is arranged at the front and rear of the valve body flow channel in a vertical direction and is fixed to the middle cavity of the valve body.

[0009] The gate channel has a V-shaped cross section.

[0010] The beneficial effects of the present invention are: it is safer and more reliable in the process of conveying high-temperature solid powder media. The use of a valve seat with a self-cleaning function allows the gate to effectively remove the medium deposited on the sealing surface through the V-shaped sharp angle structure during the opening and closing process, so that the valve can achieve a reliable sealing effect. The guard plate structure and the gate plate form a closed channel to completely block the medium in the valve flow channel, and the guard plate support seat effectively fixes the guard plate to prevent the guard plate from deformation. The present invention effectively solves the following problems: high-temperature solid slag media is deposited on the surface of the gate plate and damages the sealing surface of the gate plate; high-temperature solid slag media is deposited in the valve seat spring cavity, causing the spring to fail and destroy the valve seal; high-temperature solid slag media enters the valve body cavity, causing the valve to fail to open and close normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 Top view; Figure 3 A schematic diagram of a valve seat of the present invention; Figure 4 For the present invention Figure 1 Left view; In the figure: 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 pad, 15-sealing ring, 16-dust ring, 17-insulation material, 18-V-type. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] See also Figure 1 , Figure 3, a 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; the end surface of the valve seat support ring 3 is processed with an annular groove, and a spring seat 12, a spring 13, a thrust pad 14, and a sealing ring 15 are installed in sequence in the annular groove; the sealing ring 15 is squeezed by the spring 13 and the medium pressure, so that the inner wall and the outer wall of the sealing ring 15 are close to the annular groove of the valve seat support ring 3 to form a seal. The spring 13 is in the closed space formed by the sealing ring 15 and the annular groove of the valve seat support ring 3, which is protected from the deposition of the medium and the malfunction of the spring 13. The front end of the sealing ring 15 and the axial tail of the valve seat 4 are interlocked and connected with each other through a V-shaped structure, and 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. The sediment attached to the inner wall of the valve seat support ring 3 can be effectively removed. The front end surface of the valve seat 4 is in contact and sealed with the gate plate 1.

[0014] A dust 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 by the valve seat 4 and the valve seat support ring 3 .

[0015] The space between the valve seat support ring 3 and the inner wall of the valve body 2 is filled with a heat insulating material 17 , and the heat insulating material 17 can effectively prevent the high temperature of the flow channel of the valve body 2 from being transmitted to the outer wall of the valve body 2 .

[0016] Reference Figure 1 , Figure 2 and Figure 4 , guard plates 5 are arranged on both sides of the gate plate 1; the guard plates 5 are fixedly connected to the radial outer wall of the valve seat 4. After the fixing, the surfaces of the contact end of the valve seat and the guard plates and the gate plates are processed and ground together to ensure the flatness requirements, so that the gate plates can be better fitted together to prevent the medium from leaking out from the gap. The guard plates 5 and the gate plates 1 close 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 middle cavity of the valve body 2. A guard plate support seat 8 is installed between the guard plates 5 at the inlet and outlet positions of the flow channel, and the guard plate support seat 8 and the guard plate 5 are fastened by studs 9, nuts 10, and disc springs 11. The guard plate 5 is prevented from deformation at high temperatures.

[0017] Please refer to the figure Figure 2 , Figure 4 The gate plate 1 moves along the guide rail 7, which is arranged 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. The gate plate 2 is guided during the opening and closing process.

[0018] See also Figure 1 The gate 1 has a V-shaped channel cross-section 18, and the gate 1 can effectively remove surface deposits during opening and closing to prevent the sealing surface from being damaged.

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 fixedly connected to the valve body (2) along the flow channel direction; the end surface of the valve seat support ring (3) is processed with an annular groove, and a spring seat (12), a spring (13), a thrust washer (14), and a sealing ring (15) are installed in sequence in the annular groove; the front end of the sealing ring (15) and the axial rear end of the valve seat (4) are interlocked and connected through a V-shaped structure, and the radial outer periphery of the valve seat (4) and the inner wall of the valve seat support ring (3) are connected through a V-shaped structure.

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

3. According to claim 1, a high temperature and wear resistant valve seat structure with self-cleaning function, characterized in that: A heat insulating material (17) is filled between the valve seat support ring (3) and the inner wall of the valve body (2).

4. According to claim 1, a high temperature and wear resistant valve seat structure with self-cleaning function, characterized in that: Guard plates (5) are provided on both sides of the gate plate (1); the guard plates (5) are fixedly connected to the radial outer wall of the valve seat (4); guard plate support seats (8) are installed between the guard plates (5); the guard plate support seats (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 plate (1) moves along a guide rail (7), which is arranged at the front and rear of the flow channel of the valve body (2) in a vertical direction and is fixedly connected 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 to 5, characterized in that: The gate plate (1) channel cross-section is V-shaped (18).

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