A high-temperature RTO valve

Abstract

This utility model belongs to the field of waste gas treatment technology and discloses an RTO high-temperature valve, including an outer valve plate, an inner valve plate fixedly disposed inside the outer valve plate, a rotatable intermediate shaft disposed inside the outer valve plate and the inner valve plate, a valve plate fixedly disposed on the surface of the intermediate shaft, a graphite-based material sealing gasket fixedly disposed on the surface of the valve plate, and a pressure plate fixedly disposed on the surface of the graphite-based material sealing gasket. The high-temperature valve of this utility model has a compact structure, stable performance, and advantages such as convenient operation and installation, resistance to valve plate and valve shaft jamming, reliable sealing, low leakage rate, and long actuator life.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology and relates to an RTO high temperature valve. Background Technology

[0002] RTO stands for Regenerative Thermal Oxidizer. It is an energy-saving and environmentally friendly device used to treat low- to medium-concentration volatile organic waste gas. Its principle is to oxidize the organic waste gas into carbon dioxide and water at high temperature, thereby removing it and purifying the waste gas. It also recovers the heat released during the decomposition of the waste gas. The waste gas decomposition efficiency reaches over 99%, and the heat recovery efficiency reaches over 96%.

[0003] With the development of society, regenerative thermal oxidizer systems have been widely used in the VOCs treatment industry. However, existing high-temperature valves used in RTOs still have many problems or defects, such as valve shaft jamming in high-temperature environments, poor sealing at the valve plate and valve seat, collapse or detachment of refractory materials, and damage to actuators due to high-temperature conduction, which affect the lifespan of high-temperature valves. Summary of the Invention

[0004] The purpose of this invention is to provide an RTO high-temperature valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An RTO high-temperature valve includes an outer valve plate, an inner valve plate fixedly disposed inside the outer valve plate, a rotatable intermediate shaft disposed inside the outer valve plate and the inner valve plate, a valve plate fixedly disposed on the surface of the intermediate shaft, a graphite-based material sealing gasket fixedly disposed on the surface of the valve plate, and a pressure plate fixedly disposed on the surface of the graphite-based material sealing gasket.

[0006] In the aforementioned RTO high-temperature valve, a plurality of rake nails are fixedly arranged at equal intervals between the outer plate of the valve body and the inner plate of the valve body, and steel fiber reinforced castable is filled between the outer plate of the valve body and the inner plate of the valve body.

[0007] In the aforementioned RTO high-temperature valve, a first bracket is fixedly provided at the center of the top of the valve body plate, a second bracket is fixedly installed at the top of the first bracket, an electric actuator is fixedly installed at the top of the second bracket, and a first heat insulation gasket is fixedly provided between the first bracket and the second bracket and between the second bracket and the electric actuator.

[0008] In the aforementioned RTO high-temperature valve, the top end of the intermediate shaft extends through the valve body plate to the inside of the first bracket and is fixedly connected to the first valve shaft via a flange. A second heat insulation gasket is fixedly provided at the connection between the intermediate shaft and the first valve shaft.

[0009] In the aforementioned RTO high-temperature valve, the top of the second bracket is rotatably connected to a connecting sleeve that is fixedly connected to the output end of an electric actuator. The connecting sleeve has a keyway inside. The top of the first valve shaft extends into the interior of the second bracket and is fixed to the connecting sleeve through the keyway. The connecting sleeve has a recessed hole that matches the top of the first valve shaft, and a compression spring is nested inside the recessed hole.

[0010] In the aforementioned RTO high-temperature valve, a third bracket is fixedly provided at the center of the bottom end of the valve body plate, and the bottom end of the intermediate shaft extends into the third bracket and is fixedly connected to the second valve shaft via a flange. A third heat insulation gasket is fixedly provided between the intermediate shaft and the second valve shaft.

[0011] Compared with the prior art, the advantages of this utility model are: the high temperature valve has a compact structure, stable performance, convenient operation and installation, the valve plate and valve shaft are not easy to jam, reliable sealing, low leakage rate, and long actuator life. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of an RTO high-temperature valve according to the present invention; Figure 2 This utility model relates to an RTO high-temperature valve. Figure 1 A schematic diagram of the cross-sectional structure at point A_A; Figure 3 This utility model relates to a high-temperature RTO valve. Figure 2 A magnified schematic diagram of the structure at point B in the diagram.

[0013] In the diagram: 1. Valve body plate; 2. Steel fiber reinforced castable; 3. First support; 4. Second support; 5. Electric actuator; 6. First heat insulation gasket; 7. Compression spring; 8. First valve shaft; 9. Intermediate shaft; 10. Second heat insulation gasket; 11. Valve body plate; 12. Valve plate; 13. Third support; 14. Second valve shaft; 15. Third heat insulation gasket; 16. Rake nail; 17. Graphite-based sealing gasket; 18. Pressure plate; 19. Connecting sleeve. Detailed Implementation

[0014] 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.

[0015] Example 1: Please refer to Figure 1-3 This utility model provides a technical solution for an RTO high-temperature valve: according to Figure 1-3 As shown, an RTO high-temperature valve includes an outer valve plate 1, an inner valve plate 11 fixedly disposed inside the outer valve plate 1, a rotatable intermediate shaft 9 disposed inside the outer valve plate 1 and the inner valve plate 11, a valve plate 12 fixedly disposed on the surface of the intermediate shaft 9, a graphite-based material sealing gasket 17 fixedly disposed on the surface of the valve plate 12, and a pressure plate 18 fixedly disposed on the surface of the graphite-based material sealing gasket 17.

[0016] It should be noted that the intermediate shaft 9 is made of high-temperature resistant material 310S or special high-temperature resistant alloy steel, and the valve plate 12 is made of 310S steel plate with a thickness of 12mm-16mm. Since the valve plate 12 and the valve body are hard seals, processing errors and thermal deformation can lead to poor sealing. A layer of graphite-based material sealing gasket 17 is fixedly covered on the valve plate 12 and fixed with pressure plate 18. Since the operating temperature of graphite-based material is 1000-1600℃ and graphite has good compression resilience, it can closely fit the sealing surface of the valve plate 12 and the valve body, resulting in better sealing effect and reduced leakage rate.

[0017] Example 2: Please refer to Figure 1-3 ,according to Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses an RTO high temperature valve, in which multiple rake nails 16 are fixed at equal intervals between the outer plate 1 and the inner plate 11 of the valve body, and steel fiber reinforced castable 2 is filled between the outer plate 1 and the inner plate 11 of the valve body.

[0018] Specifically, the space between the inner plate 11 and the outer plate 1 is filled with high-temperature resistant steel fiber reinforced castable 2. Compared with fiber cotton refractory materials and ordinary castables, steel fiber reinforced castable 2 has higher density, higher temperature resistance, no deformation, better toughness, and better anti-stripping properties. Due to the addition of steel fiber reinforced castable 2, the strength of the material after casting is greatly enhanced, eliminating concerns about fiber cotton collapsing at high temperatures or ordinary castables cracking. The outer plate 1 of the valve body is equipped with several Y-shaped rake nails 16. In order to reserve a certain amount of expansion, asphalt paint is applied to the rake nails 16 at a ratio of 1.5 mm thick paint to a diameter of 10 mm. This can prevent the castable from falling off. After casting, it is baked according to a certain heating curve to avoid affecting the use effect of the castable due to untimely baking or excessive heating.

[0019] A first bracket 3 is fixedly installed at the center of the top of the valve body plate 1. A second bracket 4 is fixedly installed at the top of the first bracket 3. An electric actuator 5 is fixedly installed at the top of the second bracket 4. A first heat insulation gasket 6 is fixedly installed between the first bracket 3 and the second bracket 4 and between the second bracket 4 and the electric actuator 5.

[0020] The top end of the intermediate shaft 9 extends through the outer plate 1 of the valve body to the interior of the first bracket 3 and is fixedly connected to the first valve shaft 8 by a flange. A second heat insulation gasket 10 is fixedly provided at the connection between the intermediate shaft 9 and the first valve shaft 8.

[0021] Specifically, a second heat insulation gasket 10 is provided between the first valve shaft 8 and the intermediate shaft 9, and a first heat insulation gasket 6 is provided between the second bracket 4 and the electric actuator 5, and between the second bracket 4 and the first bracket 3, which can block heat conduction to the electric actuator 5, thereby protecting the electric actuator 5.

[0022] The top of the second bracket 4 is rotatably connected to a connecting sleeve 19 which is fixedly connected to the output end of the electric actuator 5. A keyway is provided inside the connecting sleeve 19. The top of the first valve shaft 8 extends into the interior of the second bracket 4 and is fixed to the connecting sleeve 19 through the keyway. The connecting sleeve 19 has a recessed hole that matches the top of the first valve shaft 8. A compression spring 7 is nested inside the recessed hole.

[0023] Specifically, one end of the connecting sleeve 19 with an internal keyway is connected to the output end of the electric actuator 5, and the other end is connected to the first valve shaft 8. The connecting sleeve 19 has heat sinks on the outside for faster heat dissipation and to prevent high temperature conduction from damaging the electric actuator 5. The connecting sleeve 19 has a recessed hole inside that matches the top of the first valve shaft 8. The recessed hole is relatively deep and a compression spring 7 is installed inside the recessed hole. The compression spring 7 is used to relieve the elongation caused by the thermal expansion and contraction of the first valve shaft 8, which could damage the electric actuator 5.

[0024] A third bracket 13 is fixedly provided at the center of the bottom end of the valve body plate 1. The bottom end of the intermediate shaft 9 extends into the third bracket 13 and is fixedly connected to the second valve shaft 14 through a flange. A third heat insulation gasket 15 is fixedly provided between the intermediate shaft 9 and the second valve shaft 14.

[0025] Specifically, a third heat insulation pad 15 is fixed between the intermediate shaft 9 and the second valve shaft 14 to block heat from being transferred to the bearing.

[0026] It should be noted that expansion joints are provided around the inside of the valve body to prevent the valve body inner plate 11 from deforming due to thermal expansion and contraction at high temperatures, which could cause the intermediate shaft 9 to jam with the valve body.

[0027] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A high-temperature RTO valve, comprising an outer valve body plate (1), wherein an inner valve body plate (11) is fixedly disposed inside the outer valve body plate (1), characterized in that, The valve body outer plate (1) and the valve body inner plate (11) are provided with a rotatable intermediate shaft (9), and a valve plate (12) is fixedly provided on the surface of the intermediate shaft (9). A graphite-based material sealing gasket (17) is fixedly provided on the surface of the valve plate (12); A pressure plate (18) is fixedly provided on the surface of the graphite-based material sealing gasket (17).

2. The RTO high-temperature valve according to claim 1, characterized in that: Multiple rake nails (16) are fixed at equal intervals between the outer plate (1) and the inner plate (11) of the valve body, and steel fiber reinforced castable (2) is filled between the outer plate (1) and the inner plate (11).

3. The RTO high-temperature valve according to claim 2, characterized in that: A first bracket (3) is fixedly provided at the center of the top of the valve body plate (1). A second bracket (4) is fixedly installed at the top of the first bracket (3). An electric actuator (5) is fixedly installed at the top of the second bracket (4). A first heat insulation gasket (6) is fixedly provided between the first bracket (3) and the second bracket (4) and between the second bracket (4) and the electric actuator (5).

4. The RTO high-temperature valve according to claim 3, characterized in that: The top end of the intermediate shaft (9) extends through the outer plate (1) of the valve body to the inside of the first bracket (3) and is fixedly connected to the first valve shaft (8) by a flange. A second heat insulation gasket (10) is fixedly provided at the connection between the intermediate shaft (9) and the first valve shaft (8).

5. The RTO high-temperature valve according to claim 4, characterized in that: The top of the second bracket (4) is rotatably connected to a connecting sleeve (19) that is fixedly connected to the output end of the electric actuator (5). The connecting sleeve (19) has a keyway inside. The top of the first valve shaft (8) extends into the interior of the second bracket (4) and is fixed to the connecting sleeve (19) through the keyway. The connecting sleeve (19) has a recessed hole that matches the top of the first valve shaft (8). A compression spring (7) is nested inside the recessed hole.

6. The RTO high-temperature valve according to claim 1, characterized in that: A third bracket (13) is fixedly provided at the center of the bottom end of the valve body plate (1). The bottom end of the intermediate shaft (9) extends into the third bracket (13) and is fixedly connected to the second valve shaft (14) through a flange. A third heat insulation gasket (15) is fixedly provided between the intermediate shaft (9) and the second valve shaft (14).

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