An RTO switching valve

Abstract

This invention provides an RTO switching valve, including an outer side plate, an inner side plate, a valve shaft, a valve plate, and a drive mechanism. The inner and outer side plates are arranged opposite each other. A valve port for exhaust gas to enter and exit is provided on the inner side plate. One end of the valve shaft passes through the outer side plate and connects to the drive mechanism, while the other end passes through the inner side plate. The valve plate is mounted on the valve shaft and can seal the valve port. A corrugated telescopic tube is sleeved on the valve shaft, and the tube freely expands and contracts with the reciprocating motion of the valve shaft. This invention, by using a corrugated telescopic tube on the valve shaft, ensures complete coverage of the valve shaft during movement, preventing direct contact between exhaust gas and the valve shaft, thus preventing the generation of condensate on the shaft section and avoiding the accumulation of condensate from other parts of the RTO furnace along the valve shaft at the valve sealing device, effectively protecting the sealing mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to an RTO switching valve. Background Technology

[0002] Regenerative thermal oxidizers (RTOs) are commonly used equipment for treating organic waste gas. They purify waste gas by oxidizing and decomposing organic matter at high temperatures. In an RTO system, the switching valve is a key component, responsible for controlling the flow direction of waste gas and ensuring efficient system operation. With increasingly stringent environmental protection requirements, the sealing performance and service life of RTO switching valves have become a focus of industry attention.

[0003] Currently, common RTO switching valves on the market mainly include components such as valve seat, valve plate, valve shaft, and drive mechanism. For example, Chinese patent CN214662049U discloses an elastic hard-seal RTO switching valve, which includes an outer side plate and an inner side plate of a housing arranged opposite each other. The inner side plate of the housing has a valve port for exhaust gas to enter and exit the housing. A valve seat is provided on the outer wall of the outer side plate of the housing, and a valve stem passes through the valve seat. One end of the valve stem is connected to a cylinder that drives the valve stem to push and pull, and the other end of the valve stem is placed on a guide support mechanism. A valve plate is provided on the valve stem at a position between the outer side plate and the inner side plate of the housing. A sealing device is provided between the valve seat and the valve stem.

[0004] However, existing RTO switching valves still have some technical problems in practical applications. These mainly manifest in the following ways: when high-temperature exhaust gas passes through the switching valve, the organic matter in the exhaust gas easily forms condensate upon contact with the metal components of the switching valve. This condensate flows outward along the valve shaft and accumulates at the valve's sealing mechanism. As the condensate accumulates, it gradually damages the sealing function of the sealing device, leading to seal failure and allowing exhaust gas to escape into the external environment. This not only reduces the treatment efficiency of the RTO system but may also cause secondary pollution, affecting environmental safety and equipment operational stability.

[0005] Therefore, there is an urgent need for an RTO switching valve structure that can effectively prevent condensate waste liquid from flowing along the valve shaft and has good sealing performance, in order to solve the problems existing in the prior art. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an RTO switching valve to solve the problem that in the prior art, condensate waste liquid flows outward along the valve shaft, accumulates at the valve sealing mechanism, damages the sealing function, and causes sealing failure.

[0007] To achieve the above and other related objectives, this utility model provides an RTO switching valve, including an outer side plate, an inner side plate, a valve shaft, a valve plate, and a drive mechanism. The inner side plate and the outer side plate are arranged opposite to each other. A valve port for exhaust gas to enter and exit is opened on the inner side plate. One end of the valve shaft passes through the outer side plate and is connected to the drive mechanism, while the other end of the valve shaft passes through the inner side plate. The valve plate is disposed on the valve shaft and can block the valve port. A corrugated telescopic tube is sleeved on the valve shaft, and the corrugated telescopic tube can freely expand and contract with the reciprocating motion of the valve shaft.

[0008] In one embodiment of the present invention, the two ends of the corrugated telescopic tube are detachably mounted on the valve shaft via connecting components.

[0009] In one embodiment of the present invention, the connecting assembly includes a mounting base and a hose clamp. The two mounting bases are fixed to the valve shaft at intervals. The two ends of the corrugated telescopic tube are respectively sleeved on the two mounting bases and locked and fixed by the hose clamp.

[0010] In one embodiment of the present invention, one mounting base is fixed near the valve plate, and the other mounting base is fixed near the outer side plate.

[0011] In one embodiment of this utility model, the corrugated expansion joint has a multi-section folded corrugated structure along the axial direction, and its expansion stroke covers the maximum movement displacement of the valve shaft; the expansion and contraction movement of the corrugated expansion joint isolates the condensate from contact with the valve shaft and the sealing mechanism.

[0012] In one embodiment of this utility model, the corrugated expansion tube is made of a non-metallic material, including any one of polytetrafluoroethylene, fluororubber, or silicone.

[0013] In one embodiment of this utility model, the driving mechanism is any one of a cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0014] In one embodiment of the present invention, a sealing mechanism is further included, the sealing mechanism being disposed on the outer side plate, and the valve shaft passing through the sealing mechanism.

[0015] In one embodiment of the present invention, the outer side plate has an inwardly recessed stepped groove, and the sealing mechanism is disposed in the stepped groove.

[0016] As described above, the RTO switching valve of this invention has the following beneficial effects: 1. This utility model uses a corrugated telescopic tube fitted over the valve shaft. The corrugated telescopic tube completely covers the movement range of the valve shaft. When the valve shaft moves, the corrugated telescopic tube expands and contracts accordingly, always maintaining complete coverage of the valve shaft. This isolates the exhaust gas from direct contact with the valve shaft, preventing the generation of condensate in the shaft section from the source. It also prevents condensate from other parts of the RTO furnace from accumulating along the switching valve shaft at the switching valve sealing mechanism, effectively protecting the valve shaft and solving the problem of condensate damaging the sealing function and causing seal failure. At the same time, it extends the service life of the switching valve sealing device.

[0017] 2. The corrugated expansion joint is installed on two mounting seats via hose clamps. It has a simple structure and is easy to install. It can freely expand and contract with the reciprocating linear movement of the valve shaft, effectively protecting the sealing components of the switching valve without affecting the function of the switching valve device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the RTO switching valve disclosed in the embodiments of this utility model.

[0019] Component designation explanation 1. Inner side plate; 11. Valve port; 2. Valve plate; 3. Valve shaft; 4. Mounting seat; 5. Hose clamp; 6. Corrugated expansion tube; 7. Outer side plate; 71. Step groove; 8. Sealing mechanism; 9. Drive mechanism. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] Please see Figure 1 This utility model provides an RTO switching valve, including an outer side plate 7, an inner side plate 1, a valve shaft 3, a valve plate 2, and a drive mechanism 9. The inner side plate 1 and the outer side plate 7 are arranged opposite to each other. The inner side plate 1 has a valve port 11 for exhaust gas to enter and exit, and the valve port 11 connects to the interior of the RTO. The outer side plate 7 is used to isolate the exterior of the RTO. One end of the valve shaft 3 passes through the outer side plate 7 and is connected to the drive mechanism 9. The other end of the valve shaft 3 passes through the inner side plate 1 and enters the interior of the RTO. The valve plate 2 is disposed on the valve shaft 3 and can block the valve port 11. It is worth noting that the valve shaft 3 is fitted with a corrugated telescopic tube 6, which freely expands and contracts with the reciprocating motion of the valve shaft 3.

[0022] The two ends of the corrugated expansion joint 6 are detachably mounted on the valve shaft 3 via connecting assemblies. The connecting assemblies include mounting seats 4 and hose clamps 5. The mounting seats 4 are tubular, with two seats 4 spaced apart and fixed to the valve shaft 3. The two ends of the corrugated expansion joint 6 are respectively fitted onto the two mounting seats 4 and locked in place by the hose clamps 5. This detachable connection method facilitates the installation and replacement of the corrugated expansion joint 6, improving maintenance efficiency.

[0023] Specifically, one mounting base 4 is fixed near the valve plate 2, and the other mounting base 4 is fixed near the outer plate 7. This arrangement allows the bellows expansion tube 6 to completely cover the portion of the valve shaft 3 between the inner plate 1 and the outer plate 7, effectively preventing exhaust gas leakage and the entry of external impurities.

[0024] The corrugated expansion joint 6 has a multi-section folded corrugated structure along the axial direction, and its expansion and contraction stroke covers the maximum movement displacement of the valve shaft 3. This corrugated structure allows the expansion joint to flexibly expand and contract during the reciprocating motion of the valve shaft 3, adapting to the movement requirements of the valve shaft 3 while maintaining good sealing performance.

[0025] The corrugated expansion joint 6 is made of a non-metallic material, including any one of polytetrafluoroethylene (PTFE), fluororubber, or silicone. These materials have excellent high-temperature resistance and corrosion resistance, enabling them to adapt to the harsh operating environment in RTO systems and extending the service life of the corrugated expansion joint 6. In a preferred embodiment, the corrugated expansion joint 6 is made of polytetrafluoroethylene (PTFE), which has excellent chemical corrosion resistance and high-temperature resistance, making it suitable for high-temperature environments containing corrosive gases.

[0026] Furthermore, the drive mechanism 9 can be any one of a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod. The drive mechanism 9 is connected to the valve shaft 3 and controls the reciprocating motion of the valve shaft 3 to open and close the valve plate 2 to the valve port 11. In a preferred embodiment, the drive mechanism 9 is a pneumatic cylinder, which drives the valve shaft 3 to move by compressed air. It has the characteristics of fast response speed and high control accuracy, and is suitable for the frequent switching conditions in the RTO system.

[0027] Furthermore, the RTO switching valve also includes a sealing mechanism 8, which is mounted on the outer side plate 7, and the valve shaft 3 passes through the sealing mechanism 8. The sealing mechanism 8, together with the bellows expansion joint 6, forms a double-seal protection, further improving the overall sealing performance of the switching valve. The sealing mechanism 8 can be any sealing structure already existing in the prior art.

[0028] Furthermore, the outer side plate 7 has an inwardly recessed stepped groove 71, within which the sealing mechanism 8 is disposed. This structural design allows the sealing mechanism 8 to be embedded in the stepped groove 71, which not only saves installation space but also improves the stability and sealing effect of the sealing mechanism 8.

[0029] Instructions for Use: During the operation of the RTO switching valve, the drive mechanism controls the valve shaft to reciprocate, causing the valve plate to open or close the valve port, thus switching the direction of exhaust gas flow. As the valve shaft moves, the bellows expansion tube extends and retracts accordingly, always maintaining complete coverage of the valve shaft to prevent exhaust gas leakage and the entry of external impurities. Simultaneously, a sealing mechanism located in the stepped groove of the outer side plate seals the valve shaft, forming a double-seal protection with the bellows expansion tube. This double-seal structure significantly improves the sealing performance and service life of the RTO switching valve, reduces maintenance frequency, and lowers operating costs.

[0030] In summary, this invention, by installing a corrugated expansion tube around the valve shaft, ensures complete coverage of the valve shaft during its movement. This prevents direct contact between exhaust gas and the valve shaft, inhibits condensate buildup on the shaft, and avoids the accumulation of condensate from other parts of the RTO furnace along the valve shaft at the valve's sealing device, effectively protecting the sealing mechanism. Therefore, this invention effectively overcomes the shortcomings of existing technologies and possesses high industrial applicability.

[0031] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0032] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An RTO switching valve characterized by, The device includes an outer side plate, an inner side plate, a valve shaft, a valve plate, and a drive mechanism. The inner side plate and the outer side plate are arranged opposite to each other. The inner side plate has a valve port for exhaust gas to enter and exit. One end of the valve shaft passes through the outer side plate and is connected to the drive mechanism, while the other end of the valve shaft passes through the inner side plate. The valve plate is mounted on the valve shaft and can block the valve port. The valve shaft is fitted with a corrugated telescopic tube, which freely expands and contracts with the reciprocating motion of the valve shaft.

2. The RTO switching valve according to claim 1, characterized in that, Both ends of the corrugated expansion tube are detachably mounted on the valve shaft via connecting components.

3. The RTO switch valve of claim 2, wherein, The connecting assembly includes a mounting base and a hose clamp. The two mounting bases are fixed to the valve shaft at intervals. The two ends of the corrugated telescopic tube are respectively sleeved on the two mounting bases and locked and fixed by the hose clamp.

4. The RTO switch valve of claim 3, wherein, One mounting bracket is fixed near the valve plate, and the other mounting bracket is fixed near the outer side plate.

5. The RTO switch valve of claim 1, wherein, The corrugated expansion tube has a multi-section folded corrugated structure along the axial direction, and its expansion stroke covers the maximum movement displacement of the valve shaft.

6. The RTO switch valve of claim 1, wherein, The corrugated expansion tube is made of non-metallic material, including any one of polytetrafluoroethylene, fluororubber, or silicone.

7. The RTO switch valve of claim 1, wherein, The drive mechanism is any one of a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod.

8. The RTO switching valve according to claim 1, characterized in that, It also includes a sealing mechanism disposed on the outer side plate, and the valve shaft passes through the sealing mechanism.

9. The RTO switch valve of claim 8, wherein, The outer side plate has an inwardly recessed stepped groove, and the sealing mechanism is disposed within the stepped groove.

Images