Valve seat fixing structure of ultrahigh-temperature valve

Abstract

The utility model discloses a valve seat fixing structure of an ultra-high temperature valve, which relates to the field of valves, and comprises a valve body, a valve seat, an outer clamping ring, an inner clamping ring, an inner clamping ring, an inner clamping ring and a sealing ring, the lower clamping ring is fixedly mounted on the inner wall surface of the flow channel and is fixedly connected with the lower surface of the valve seat through a shrinkage fit process; the pressing plate is fixedly mounted in the valve body and presses the valve seat; an inner sleeve, a heat insulation ring and an outer sleeve which are made of high-temperature-resistant materials are sequentially arranged between the valve seat and the outer clamping ring from inside to outside. The utility model has the advantages of good working stability and high temperature resistance.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a valve seat fixing structure of an ultra-high temperature valve. Background Art

[0002] The valve seats in the prior art are all fixedly installed on the inner wall of the valve body by welding, but this structure is only suitable for working environments with medium temperatures ≤ 1000°C. For working environments with medium temperatures greater than 1000°C, this valve seat fixing structure will fail. Therefore, there is an urgent need for a valve seat fixing structure that is resistant to ultra-high temperatures. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a valve seat fixing structure of an ultra-high temperature valve with good working stability and high temperature resistance.

[0004] The technical solution adopted by the utility model is: a valve seat fixing structure of an ultra-high temperature valve, which includes a valve body and a valve seat, wherein a flow channel is provided in the valve body, and further includes:

[0005] An external clamping ring, which is fixedly mounted on the inner wall of the valve body and corresponds to the circumferential surface of the valve seat;

[0006] A lower clamping ring, which is fixedly mounted on the inner wall of the flow channel and is fixedly connected to the lower surface of the valve seat through a red sleeve process;

[0007] A pressure plate, which is fixedly installed in the valve body and presses the valve seat tightly;

[0008] An inner sleeve, a heat-insulating ring and an outer sleeve made of high-temperature resistant material are arranged in sequence from the inside to the outside between the valve seat and the outer clamping ring.

[0009] The valve seat is made of TaW10 alloy, and the outer surface of the valve seat is provided with a first heat-insulating coating and adopts ZS-1 coating.

[0010] The inner sleeve is made of metallurgical ceramic Si3N4.

[0011] The heat insulation ring is made of compression molded ZrO2 ceramics.

[0012] The outer sleeve is made of GH3128 alloy.

[0013] The outer retaining ring is welded and fixed to the inner wall of the valve body, and the lower retaining ring is welded and fixed to the inner wall of the flow channel of the valve body; the materials of the valve body, the outer retaining ring and the lower retaining ring are all made of 35CrNi3MoVR gun steel.

[0014] A heat-insulating sleeve is arranged in the flow channel, and a second heat-insulating coating is arranged on the outer wall surface of the heat-insulating sleeve.

[0015] The material of the thermal insulation sleeve is Nb521 alloy.

[0016] The second thermal insulation coating adopts ZS-1 coating.

[0017] The beneficial effects of the utility model are as follows: the technical solution firmly fixes the valve seat inside the valve body through the lower clamping ring, the outer clamping ring and the pressure plate. The lower clamping ring, the outer clamping ring and the valve body are made of the same material and can therefore be fixed by welding. The lower clamping ring and the valve seat are firmly fixed by a red sleeve process. In addition, the valve seat is provided with an inner sleeve, an insulating ring and an outer sleeve made of high-temperature resistant material, which has the advantages of good working stability and high temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the valve seat fixing structure of the ultra-high temperature valve according to an embodiment of the utility model. DETAILED DESCRIPTION

[0019] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0020] As shown in the figure, the valve seat fixing structure of the ultra-high temperature valve includes a valve body 1 and a valve seat 2. The valve body 1 is provided with a flow channel 11, and also includes:

[0021] An external clamping ring 7, which is fixedly mounted on the inner wall of the valve body and corresponds to the circumferential surface of the valve seat;

[0022] A lower clamping ring 8, which is fixedly mounted on the inner wall of the flow channel and is fixedly connected to the lower surface of the valve seat through a red sleeve process;

[0023] A pressure plate 3, which is fixedly installed in the valve body and presses the valve seat;

[0024] An inner sleeve 4, an insulating ring 5 and an outer sleeve 6 made of high-temperature resistant material are arranged in sequence between the valve seat 2 and the outer clamp ring 7 from the inside to the outside; this technical solution firmly fixes the valve seat to the inside of the valve body through the lower clamp ring, the outer clamp ring and the pressure plate. The lower clamp ring, the outer clamp ring and the valve body are made of the same material and can therefore be fixed by welding. The lower clamp ring and the valve seat are firmly fixed by a red sleeve process. In addition, an inner sleeve, an insulating ring and an outer sleeve made of high-temperature resistant material are arranged outside the valve seat, which has the advantages of good working stability and high temperature resistance.

[0025] The valve seat 2 is made of TaW10 alloy, and the outer surface of the valve seat is provided with a first heat-insulating coating 12 and adopts ZS-1 coating; the material is not only resistant to high temperatures of 2100°C, but also resistant to high-temperature and high-speed fluid erosion.

[0026] The inner sleeve 4 is made of metallurgical ceramic Si3N 4， The maximum temperature resistance is 1500℃, and the heat insulation effect is ideal. Through heat insulation, the temperature can be reduced to below 400℃.

[0027] The insulation ring 5 is made of compression molded ZrO2 ceramic, which is a lightweight, refractory and energy-saving material with good high-temperature stability, a thermal conductivity of 0.055, no volatilization and no loss at high temperatures, and the temperature can be reduced to below 100°C through insulation.

[0028] The outer sleeve 6 is made of GH3128 alloy and has good high temperature resistance.

[0029] The outer retaining ring 7 is welded and fixed to the inner wall of the valve body 1, and the lower retaining ring 8 is welded and fixed to the inner wall of the flow channel of the valve body 1; the valve body 1, the outer retaining ring 7 and the lower retaining ring 8 are all made of 35CrNi3MoVR gun steel, which are the same material and can be fixed by welding, having the advantage of a stable structure.

[0030] An insulating sleeve 9 is provided in the flow channel, and a second insulating coating 10 is provided on the outer wall of the insulating sleeve 9. The insulating sleeve 9 is made of Nb521 alloy; the second insulating coating 10 is made of ZS-1 paint, which has good insulating performance and greatly reduces the stability of the valve body surface.

[0031] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0033] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

Claims

1. A valve seat fixing structure for an ultra-high temperature valve, comprising a valve body (1) and a valve seat (2), wherein a flow channel (11) is provided in the valve body (1), and characterized in that: Also includes: An external clamping ring (7) fixedly mounted on the inner wall of the valve body and corresponding to the circumferential surface of the valve seat; A lower clamping ring (8) which is fixedly mounted on the inner wall surface of the flow channel and is fixedly connected to the lower surface of the valve seat by a red sleeve process; A pressure plate (3) fixedly mounted in the valve body and pressing the valve seat; An inner sleeve (4), a heat-insulating ring (5), and an outer sleeve (6) made of high-temperature resistant material are provided in sequence from the inside to the outside between the valve seat (2) and the outer clamping ring (7).

2. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: The material used for the valve seat (2) is TaW10 alloy, and the outer surface of the valve seat is provided with a first heat-insulating coating (12) and uses ZS-1 paint.

3. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: The inner sleeve (4) is made of metallurgical ceramic Si3N4.

4. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: The heat insulating ring (5) is made of compression molded ZrO2 ceramics.

5. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: The outer sleeve (6) is made of GH3128 alloy.

6. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: The outer retaining ring (7) is fixedly welded to the inner wall of the valve body (1), and the lower retaining ring (8) is fixedly welded to the inner wall of the flow channel of the valve body (1); the valve body (1), the outer retaining ring (7) and the lower retaining ring (8) are all made of 35CrNi3MoVR blast steel.

7. The valve seat fixing structure of the ultra-high temperature valve according to claim 1, characterized in that: A heat-insulating sleeve (9) is provided in the flow channel, and a second heat-insulating coating (10) is provided on the outer wall surface of the heat-insulating sleeve (9).

8. The valve seat fixing structure of the ultra-high temperature valve according to claim 7, characterized in that: The material of the thermal insulation sleeve (9) is Nb521 alloy.

9. The valve seat fixing structure of the ultra-high temperature valve according to claim 7, characterized in that: The second thermal insulation coating (10) adopts ZS-1 coating.

Images