RTO equipment lift valve with novel sealing structure

Abstract

The utility model relates to the technical field of RTO equipment, in particular to a novel sealing structure for a lift valve of RTO equipment, which comprises a valve body frame, a valve rod, a valve seat, a valve plate and an air cylinder, the valve rod and the valve seat are arranged on the valve body frame, the valve plate is arranged on the valve rod, the air cylinder is connected with the valve rod, the valve rod penetrates through the valve seat, and the sealing structure is arranged on the valve seat. The valve plate is matched with the sealing structure, and the sealing structure comprises a soft seal located on the outer side and a hard seal located on the inner side. According to the RTO equipment lift valve with the novel sealing structure, a soft and hard sealing combined mode is adopted, linear hard sealing is adopted for the inner ring, elastic silicon rubber soft sealing is adopted for the outer ring, the good sealing effect is achieved, the service life of the RTO equipment lift valve is effectively prolonged, the sealing performance of the RTO equipment lift valve is effectively improved, and zero leakage is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of RTO equipment, in particular to an RTO equipment lifting valve with a novel sealing structure. Background Art

[0002] With the rapid development of industrial technology, a large number of V O C s Discharged into the environment, regenerative thermal incinerator (RTO) is widely used in V O C s In the treatment process, the lift valve is an important component of the RTO system, which determines whether the RTO equipment can operate efficiently. How to improve the sealing performance of the lift valve in a high temperature environment has been a topic of research and discussion in recent years.

[0003] Poppet valves operate in high-temperature environments for extended periods, and the valve plate seals are susceptible to deformation during use. Furthermore, the exhaust gas passing through the poppet valve is complex, containing small amounts of particulate matter and sticky substances that can easily adhere to the valve plate surface. This can create a small gap between the valve plate and the seal, increasing valve leakage. A sliding pair exists between the valve stem and the sleeve of the poppet valve to facilitate its raising and lowering motion. However, if the sealing of this sliding pair weakens, the pressure inside the valve will exceed the pressure outside the valve, and the flowing medium will easily leak out of the housing. Furthermore, if the exhaust gas contains corrosive components, the leaked gas can easily corrode the electrical drive system. Therefore, ensuring a good seal between the valve plate and the valve stem is crucial. Utility Model Content

[0004] To address the above technical issues, this utility model proposes a poppet valve for RTO equipment with a novel sealing structure. Combining the characteristics of both hard and soft seals, this unique sealing method reduces wear, extends service life, and reduces the risk of contaminant leakage.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solutions:

[0006] A lifting valve for RTO equipment with a novel sealing structure includes a valve body frame, a valve stem and a valve seat arranged on the valve body frame, a valve plate arranged on the valve stem, and a cylinder connected to the valve stem. The valve stem passes through the valve seat, and a sealing structure is provided on the valve seat. The valve plate cooperates with the sealing structure, and the sealing structure includes a soft seal located on the outside and a hard seal located on the inside.

[0007] As a further improvement of the present invention, the soft seal is a silicone rubber sealing ring.

[0008] As a further improvement of the present invention, the hard seal is a stainless steel sealing ring.

[0009] The beneficial effects of the utility model are:

[0010] The utility model provides an RTO equipment lifting valve with a new sealing structure, which adopts a combination of soft and hard seals. The inner ring adopts a linear hard seal and the outer ring adopts an elastic silicone rubber soft seal to achieve a good sealing effect, effectively improve the service life and sealing performance of the RTO equipment lifting valve, and achieve zero leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below with reference to the accompanying drawings and embodiments:

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

[0013] Figure 2 This is a schematic diagram of the sealing structure of the utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the sealing structure of the utility model.

[0015] In the figure: 1. Valve body frame; 2. Valve stem; 3. Valve plate; 4. Sealing structure; 41. Soft seal; 42. Hard seal; 5. Support structure; 6. Valve seat; 7. Cylinder; 8. Inspection cover. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, an RTO equipment lifting valve with a new sealing structure is mainly composed of a valve body frame 1, a valve stem 2, a valve plate 3, a sealing structure 4, a supporting structure 5, a valve seat 6, a cylinder 7, and an inspection cover 8.

[0018] The valve body frame 1 serves as an integral external structure and serves to fix the valve stem 2 for horizontal or vertical limited movement; the valve stem 2 is connected to the cylinder 7; the valve plate 3 is mounted on the valve stem 2 and is mainly composed of multiple plates. The plate directly connected to the valve stem 2 is mainly used for reinforcement, the middle plate ensures the lifting stability of the valve body assembly, and the bottom plate is a gland; the sealing structure 4 is provided on the valve seat 6, as shown in FIG. Figure 2 and Figure 3As shown, it mainly consists of a soft seal 41 located on the outside and a hard seal 42 located on the inside. The soft seal 41 is a silicone rubber sealing ring that is sleeved onto the valve seat 6. The hard seal 42 is a stainless steel sealing ring that is welded to the valve seat 6. The contact surface on the hard seal 42 is a linear contact surface with chamfers on both sides to ensure flatness. The assembly of the soft seal 41 and the hard seal 42 requires that the inner and outer rings are basically on the same plane. This device combines the soft seal 41 and the hard seal 42 by using a linear hard seal on the inner ring and an elastic silicone rubber seal on the outer ring, thereby improving the sealing effect, reducing the wear rate of the seals, and extending the replacement cycle.

[0019] The support structure 5 is welded on the valve body frame 1 and is used to connect the valve seat 6; the cylinder 7 serves as a power mechanism for moving the valve stem 2 to realize the push-pull action of the valve plate 3; the inspection cover plate 8 is fixed on the valve body frame 1 and is used for regular inspection and maintenance of the valve plate assembly.

[0020] The working principle and use process of this utility model:

[0021] During operation, the gas inlet and outlet are located directly below the valve plate 3. When the exhaust gas needs to enter the RTO system, the valve plate 3 moves vertically upward through the cylinder 7 and is lifted to the sleeve of the valve stem 2, reaching a fully open state; when the RTO system prohibits the flow of exhaust gas, the valve plate 3 falls vertically downward through the cylinder 7 to the initial closed state. In the closed state, the valve plate 3 is in direct contact with the soft seal 41 and the hard seal 42 on the sealing structure 4.

[0022] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A poppet valve for RTO equipment with a new sealing structure, characterized by: The invention comprises a valve body frame (1), a valve stem (2) and a valve seat (6) arranged on the valve body frame (1), a valve plate (3) arranged on the valve stem (2), and a cylinder (7) connected to the valve stem (2); the valve stem (2) passes through the valve seat (6); a sealing structure (4) is arranged on the valve seat (6); the valve plate (3) cooperates with the sealing structure (4); the sealing structure (4) comprises a soft seal (41) located on the outside and a hard seal (42) located on the inside; the soft seal (41) is a silicone rubber sealing ring; the hard seal (42) is a stainless steel sealing ring; and the contact surface on the hard seal (42) is a linear contact surface.

2. The RTO equipment lift valve with a novel sealing structure according to claim 1, characterized in that: The contact surface on the hard seal (42) is chamfered on both sides.

3. The RTO equipment lift valve with a novel sealing structure according to claim 1, characterized in that: The valve seat (6) is connected to a support structure (5), and the support structure (5) is fixed on the valve body frame (1).

4. The RTO equipment lift valve with a novel sealing structure according to claim 1, characterized in that: An inspection cover plate (8) is provided on the valve body frame (1).

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