RTO rotary valve stator and rotor structure with annular sealing unit

Abstract

The RTO rotary valve stator and rotor structure with the annular sealing unit comprises a rotary valve stator, the rotary valve stator is cylindrical, round holes are formed in the centers of the upper surface and the lower surface of the rotary valve stator, a rotating shaft is arranged in the two round holes in a penetrating mode, and the rotating shaft is rotationally connected with the two round holes. The rotating shaft penetrating into the rotating valve stator is fixedly connected with a rotating valve rotor; and a plurality of groups of annular sealing units are arranged between the rotating valve stator and the rotating valve rotor. The RTO rotary valve stator and rotor structure with the annular sealing unit solves the problem that in the prior art, a sealing structure between a stator and a rotor in a traditional rotary valve is poor in sealing effect.

Description

Technical Field

[0001] This utility model relates to the technical field of high-temperature oxidation equipment for waste gas, specifically to the stator and rotor structure of an RTO rotary valve with an annular sealing unit. Background Technology

[0002] "RTO" is short for "Regenerative Thermal Oxidizer". This technology heats organic waste gas to a high temperature and then directly oxidizes and decomposes it into CO2 and H2O, thereby treating the waste gas pollutants and recovering the heat generated during decomposition. It is an energy-saving and environmentally friendly device for treating medium- to high-concentration organic waste gas.

[0003] Currently, there are two main types of RTOs on the market: bed-type and rotary. The main component of a rotary RTO is a rotary valve, through which exhaust gas circulates and switches between multiple regenerator chambers. Currently, the stator and rotor of rotary valves on the market are mainly contact-type or gas-tight, resulting in poor sealing, high leakage rates, and easy damage and short lifespan of the seals. This invention proposes an RTO rotary valve stator-rotor structure with an annular sealing unit, which significantly improves the sealing performance between the stator and rotor of the rotary valve, offering high reliability, long lifespan, and suitability for various operating conditions, thus further promoting the application of rotary RTOs. Utility Model Content

[0004] The purpose of this invention is to provide a stator-rotor structure for an RTO rotary valve with an annular sealing unit, which solves the problem of poor sealing effect of the sealing structure between the stator and rotor in the traditional rotary valve in the prior art.

[0005] The technical solution adopted in this utility model is: an RTO rotary valve stator and rotor structure with annular sealing units, including a rotary valve stator, which is cylindrical, with circular holes at the center of the upper and lower surfaces of the rotary valve stator, and a rotating shaft passing through the two circular holes. The rotating shaft is rotatably connected to the two circular holes, and a rotary valve rotor is fixedly connected to the rotating shaft passing through the rotary valve stator. Several sets of annular sealing units are provided between the rotary valve stator and the rotary valve rotor.

[0006] The features of this utility model also include:

[0007] The rotary valve rotor is located inside the rotary valve stator, and there is a gap between the rotary valve rotor and the rotary valve stator.

[0008] The axes of several annular sealing units coincide with the axis of the rotary valve rotor.

[0009] Several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor.

[0010] The annular sealing unit includes an annular plate. The outer ring of the annular plate is fixedly connected to the inner wall of the rotary valve stator. The inner ring diameter of the annular plate is larger than the diameter of the rotary valve rotor. The two sides of the annular plate are respectively provided with a first wear-resistant ring and a second wear-resistant ring. The outer rings of the first wear-resistant ring and the second wear-resistant ring are fixedly connected to the rotary valve stator.

[0011] The first and second wear-resistant rings are the same size, and the inner diameter of the first and second wear-resistant rings is larger than the inner diameter of the annular plate.

[0012] The annular sealing unit also includes a sealing ring with an "L" shaped cross-section. One ring surface of the sealing ring is fixed to the rotary valve rotor by bolts, and the other ring surface of the sealing ring is in contact with the corresponding first wear-resistant ring.

[0013] The annular sealing unit also includes two sealing rings with an "L" shaped cross-section. One ring surface of the two sealing rings is fixed to the rotary valve rotor by bolts, and the other ring surface of the two sealing rings is in contact with the corresponding first and second wear-resistant rings.

[0014] The beneficial effects of this invention are as follows: The RTO rotary valve stator and rotor structure with an annular sealing unit provides a circumferential contact lip-type rotary seal structure, isolating the fluid on both sides of the seal and solving the fluid sealing problem between the rotary valve stator and rotor while they rotate. Furthermore, even when the rotary valve stator and rotor are displaced relative to each other during operation, regardless of whether the rotor moves upward or downward, the sealing ring remains tightly fitted with the wear-resistant ring, ensuring sealing performance. The structure provided by this invention has a large sealing contact area, low leakage rate, and the sealing ring is not easily damaged, resulting in a long service life. It is a superior invention for replacing rotary valves on the market that suffer from high leakage and high maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the stator and rotor structure of the RTO rotary valve with an annular sealing unit according to the present invention.

[0016] Figure 2 This is a partially enlarged schematic diagram of the present invention.

[0017] In the diagram: 1. Rotary valve stator; 2. Rotary valve rotor; 3. Annular plate; 4. Second wear-resistant ring; 5. First wear-resistant ring; 7. Sealing ring. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1As shown, this utility model provides an RTO rotary valve stator and rotor structure with annular sealing units, including a rotary valve stator 1, which is cylindrical. The rotary valve stator 1 has a circular hole at the center of both the upper and lower surfaces. A rotating shaft passes through the two circular holes and is rotatably connected to the two circular holes. A rotary valve rotor 2 is fixedly connected to the rotating shaft that passes through the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2.

[0020] like Figure 1 and Figure 2 As shown, the rotary valve rotor 2 is located inside the rotary valve stator 1, and there is a gap between the rotary valve rotor 2 and the rotary valve stator 1.

[0021] The axes of several annular sealing units coincide with the axis of the rotary valve rotor 2.

[0022] Several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2.

[0023] The annular sealing unit includes an annular plate 3. The outer ring of the annular plate 3 is fixedly connected to the inner wall of the rotary valve stator 1. The inner ring diameter of the annular plate 3 is larger than the diameter of the rotary valve rotor 2. The two sides of the annular plate 3 are respectively provided with a first wear-resistant ring 5 and a second wear-resistant ring 4. The outer rings of the first wear-resistant ring 5 and the second wear-resistant ring 4 are fixedly connected to the rotary valve stator 1.

[0024] The first wear-resistant ring 5 and the second wear-resistant ring 4 have the same dimensions, and the inner diameter of the first wear-resistant ring 5 and the second wear-resistant ring 4 is larger than the inner diameter of the annular plate 3.

[0025] When the leakage rate of the RTO rotary valve is >0.05%, a single-ring seal is adopted. Specifically, the annular sealing unit also includes a sealing ring 7. The cross-section of the sealing ring 7 is "L" shaped. One ring surface of the sealing ring 7 is fixed to the rotary valve rotor 2 by bolts, and the other ring surface of the sealing ring 7 is in contact with the corresponding first wear-resistant ring 5 to form an annular lip seal.

[0026] When the leakage rate of the RTO rotary valve is ≤0.05%, a double-ring seal is adopted. Specifically, the annular sealing unit also includes two sealing rings 7. The cross-section of the sealing rings 7 is "L" shaped. One ring surface of the two sealing rings 7 is fixed to the rotary valve rotor 2 by bolts. The other ring surface of the two sealing rings 7 is in contact with the corresponding first wear-resistant ring 5 and second wear-resistant ring 4 to form an annular lip seal.

[0027] The annular plate 3, the second wear-resistant ring 4, and the first wear-resistant ring 5 remain stationary along with the rotary valve stator 1. The sealing ring 7 rotates together with the rotary valve rotor 2.

[0028] The annular sealing unit of this utility model can also allow the annular plate 3, the second wear-resistant ring 4 and the first wear-resistant ring 5, which were originally fixed to the rotary valve stator 1, to be fixed to the rotary valve rotor 2, and allow the sealing ring 7, which was originally fixed to the rotary valve rotor 2, to be fixed to the rotary valve stator 1.

[0029] The sealing ring 7 is made of elastic material and is L-shaped. One side is fixed to the rotary valve rotor 2, and the other side is tightly fitted to the wear-resistant ring. When the leakage rate of the RTO rotary valve is ≤0.05%, a double-ring seal is used, with L-shaped seals and wear-resistant rings on both sides; when the leakage rate of the RTO rotary valve is >0.05%, an L-shaped seal and wear-resistant ring are only provided on one side.

[0030] This utility model provides an RTO rotary valve stator and rotor structure with an annular sealing unit. Its working principle is as follows: the rotary valve rotor 2 has an internal structure divided into two sides, with a channel hole in the middle annular plate. Exhaust gas passes through the rotary valve stator 1 and rotary valve rotor 2 into the first layer region, then through the middle annular plate into the second layer region, and finally exits from the second layer region. As the rotary valve rotor 2 rotates, the exhaust gas is distributed to different regions. The purified airflow, following the same principle, enters the first layer from the second layer, achieving the guiding effect of RTO airflow. The sealing ring 7 rotates with the rotary valve rotor 2, and its contact surface rubs against the wear-resistant ring. Fluid flows between the rotary valve stator 1 and rotary valve rotor 2, and is isolated at this sealing structure, achieving fluid stratification inside the rotary valve. This solves the problem of fluid sealing between the rotary valve stator and rotor while they rotate.

[0031] With this invention, the rotary valve stator 1 and rotary valve rotor 2 rotate simultaneously, while maintaining strong fluid sealing between them. Furthermore, even when the rotary valve stator and rotor are displaced relative to each other during operation, regardless of whether the rotor moves upward or downward, the sealing ring remains tightly fitted to the wear-resistant ring, ensuring sealing performance.

[0032] Example 1

[0033] like Figure 1 As shown, the RTO rotary valve stator and rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. The rotary valve stator 1 has a circular hole at the center of both the upper and lower surfaces. A rotating shaft passes through the two circular holes and is rotatably connected to the two circular holes. A rotary valve rotor 2 is fixedly connected to the rotating shaft that passes through the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2.

[0034] Example 2

[0035] like Figure 1 and Figure 2As shown, the RTO rotary valve stator and rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. Rotary shafts pass through these holes and are rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shafts inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1.

[0036] Example 3

[0037] like Figure 1 and Figure 2 As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2.

[0038] Example 4

[0039] like Figure 1 and Figure 2 As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2. The several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2.

[0040] Example 5

[0041] like Figure 1 and Figure 2As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2. The several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2. The annular sealing unit includes an annular plate 3. The outer ring of the annular plate 3 is fixedly connected to the inner wall of the rotary valve stator 1. The inner ring diameter of the annular plate 3 is larger than the diameter of the rotary valve rotor 2. The two sides of the annular plate 3 are respectively provided with a first wear-resistant ring 5 and a second wear-resistant ring 4. The outer rings of the first wear-resistant ring 5 and the second wear-resistant ring 4 are fixedly connected to the rotary valve stator 1.

[0042] Example 6

[0043] like Figure 1 and Figure 2 As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2. The several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2. The annular sealing unit includes an annular plate 3. The outer ring of the annular plate 3 is fixedly connected to the inner wall of the rotary valve stator 1. The inner ring diameter of the annular plate 3 is larger than the diameter of the rotary valve rotor 2. A first wear-resistant ring 5 and a second wear-resistant ring 4 are respectively provided on two sides of the annular plate 3. The outer rings of the first wear-resistant ring 5 and the second wear-resistant ring 4 are fixedly connected to the rotary valve stator 1. The first wear-resistant ring 5 and the second wear-resistant ring 4 have the same dimensions, and the inner ring diameter of the first wear-resistant ring 5 and the second wear-resistant ring 4 is larger than the inner ring diameter of the annular plate 3.

[0044] Example 7

[0045] like Figure 1 and Figure 2As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2. The several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2. The annular sealing unit includes an annular plate 3. The outer ring of the annular plate 3 is fixedly connected to the inner wall of the rotary valve stator 1. The inner ring diameter of the annular plate 3 is larger than the diameter of the rotary valve rotor 2. A first wear-resistant ring 5 and a second wear-resistant ring 4 are respectively provided on two sides of the annular plate 3. The outer rings of the first wear-resistant ring 5 and the second wear-resistant ring 4 are fixedly connected to the rotary valve stator 1. The first wear-resistant ring 5 and the second wear-resistant ring 4 have the same dimensions, and the inner ring diameter of the first wear-resistant ring 5 and the second wear-resistant ring 4 is larger than the inner ring diameter of the annular plate 3. The annular sealing unit also includes a sealing ring 7. The sealing ring 7 has an "L"-shaped cross-section. One ring surface of the sealing ring 7 is fixedly connected to the rotary valve rotor 2 by bolts, and the other ring surface of the sealing ring 7 is in contact with the corresponding first wear-resistant ring 5.

[0046] Example 8

[0047] like Figure 1 and Figure 2As shown, the RTO rotary valve stator-rotor structure with annular sealing units proposed in this embodiment includes a rotary valve stator 1, which is cylindrical. Circular holes are formed at the centers of both the upper and lower surfaces of the rotary valve stator 1. A rotating shaft passes through each of the two circular holes and is rotatably connected to them. A rotary valve rotor 2 is fixedly connected to the rotating shaft inside the rotary valve stator 1. Several sets of annular sealing units are provided between the rotary valve stator 1 and the rotary valve rotor 2. The rotary valve rotor 2 is located inside the rotary valve stator 1, and a gap exists between the rotary valve rotor 2 and the rotary valve stator 1. The axes of the several annular sealing units coincide with the axis of the rotary valve rotor 2. The several annular sealing units are evenly distributed along the axial direction of the rotary valve rotor 2. The annular sealing unit includes an annular plate 3. The outer ring of the annular plate 3 is fixedly connected to the inner wall of the rotary valve stator 1. The inner ring diameter of the annular plate 3 is larger than the diameter of the rotary valve rotor 2. A first wear-resistant ring 5 and a second wear-resistant ring 4 are respectively provided on two sides of the annular plate 3. The outer rings of the first wear-resistant ring 5 and the second wear-resistant ring 4 are fixedly connected to the rotary valve stator 1. The first wear-resistant ring 5 and the second wear-resistant ring 4 have the same dimensions, and their inner ring diameters are larger than the inner ring diameter of the annular plate 3. The annular sealing unit also includes two sealing rings 7. The sealing rings 7 have an "L"-shaped cross-section. One ring surface of the two sealing rings 7 is fixedly connected to the rotary valve rotor 2 by bolts, and the other ring surface of the two sealing rings 7 is in contact with the corresponding first wear-resistant ring 5 and second wear-resistant ring 4.

Claims

1. An RTO rotary valve stator and rotor structure with an annular sealing unit, characterized in that, The device includes a rotary valve stator (1), which is cylindrical. The center of the upper and lower surfaces of the rotary valve stator (1) is provided with a circular hole. A rotating shaft passes through the two circular holes and is rotatably connected to the two circular holes. A rotary valve rotor (2) is fixedly connected to the rotating shaft that passes through the rotary valve stator (1). Several sets of annular sealing units are provided between the rotary valve stator (1) and the rotary valve rotor (2).

2. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 1, characterized in that, The rotary valve rotor (2) is located inside the rotary valve stator (1), and there is a gap between the rotary valve rotor (2) and the rotary valve stator (1).

3. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 2, characterized in that, The axes of several of the annular sealing units coincide with the axis of the rotary valve rotor (2).

4. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 3, characterized in that, The plurality of annular sealing units are evenly distributed along the axial direction of the rotary valve rotor (2).

5. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 4, characterized in that, The annular sealing unit includes an annular plate (3), the outer ring of the annular plate (3) is fixedly connected to the inner wall of the rotary valve stator (1), the inner ring diameter of the annular plate (3) is larger than the diameter of the rotary valve rotor (2), and the two sides of the annular plate (3) are respectively provided with a first wear-resistant ring (5) and a second wear-resistant ring (4), the outer rings of the first wear-resistant ring (5) and the second wear-resistant ring (4) are fixedly connected to the rotary valve stator (1).

6. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 5, characterized in that, The first wear-resistant ring (5) and the second wear-resistant ring (4) are the same size, and the inner diameter of the first wear-resistant ring (5) and the second wear-resistant ring (4) is larger than the inner diameter of the annular plate (3).

7. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 6, characterized in that, The annular sealing unit also includes a sealing ring (7), the cross-section of which is "L" shaped. One ring surface of the sealing ring (7) is fixed to the rotary valve rotor (2) by bolts, and the other ring surface of the sealing ring (7) is in contact with the corresponding first wear-resistant ring (5).

8. The RTO rotary valve stator and rotor structure with an annular sealing unit according to claim 6, characterized in that, The annular sealing unit also includes two sealing rings (7). The cross-section of the sealing rings (7) is "L" shaped. One ring surface of the two sealing rings (7) is fixed to the rotary valve rotor (2) by bolts. The other ring surface of the two sealing rings (7) is in contact with the corresponding first wear-resistant ring (5) and second wear-resistant ring (4).

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