A tower-type three-chamber RTO switching valve mechanism

Abstract

The present invention discloses a tower-type three-chamber RTO switching valve mechanism. Aiming at the switching valve movement during the incineration of high-volume, high-concentration, and volatile organic waste gas, the mechanism incorporates the following structures: (1) a three-stage sealing structure consisting of graphite packing, compressed air, and a skeleton oil seal; (2) a flexible connection and compensation structure constructed of a fisheye joint and a Y-shaped joint; (3) a dual anti-slip structure constructed of a threaded pair and an anti-slip clamp; and (4) an adjustable support roller structure. This mechanism solves the problems of easy wear, leakage, easy detachment, and difficulty in adjustment during the operation of the switching valve, ensuring efficient and stable operation of the switching valve.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental protection equipment, in particular to a tower-type three-chamber RTO switching valve mechanism. Background Art

[0002] RTO is a highly efficient organic waste gas treatment device. Compared with traditional catalytic combustion and direct-fired thermal oxidation furnaces, it has the characteristics of high thermal efficiency, low operating costs, and the ability to treat large air volumes of low-concentration waste gas. RTO is a regenerative thermal oxidizer. The principle is to oxidize the organic matter in the waste gas into corresponding carbon dioxide and water at high temperatures, thereby purifying the waste gas and recovering the heat released when the waste gas decomposes. Taking the patent with authorization announcement number CN208237886U and the name "Three-chamber RTO regenerative combustion furnace body with purge pipeline" as an example, the main structure of RTO consists of a combustion chamber, a regenerative chamber, and a switching valve.

[0003] The switching valve mechanism is a critical component of the tower-type three-chamber RTO and is key to ensuring efficient processing. The valve shaft is rigidly connected to the cylinder's telescopic rod. During operation, the switching valve can be susceptible to wear, leakage, detachment, and difficulty adjusting due to harsh on-site environments and untimely maintenance. This can severely impact RTO efficiency and increase operational and maintenance costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a tower-type three-chamber RTO switching valve mechanism to solve the problems existing in the prior art.

[0005] The object of the present invention is achieved as follows: a tower-type three-chamber RTO switching valve mechanism, comprising:

[0006] A cylinder (1) mounted outside the RTO chamber;

[0007] A round rod-shaped valve shaft (5) moves horizontally through the outer wall (11) of the RTO and extends into the interior (10) of the RTO, and the telescopic rod of the cylinder (1) is connected to the valve shaft (5);

[0008] A switching valve plate (8) fixedly sleeved on the valve shaft (5) and located inside the RTO (10) for opening and closing the valve port (9);

[0009] An anti-leakage sealing structure (6), the anti-leakage sealing structure (6) being an annular structure as a whole and sealing the fitting gap between the valve shaft (5) and the RTO outer wall (11);

[0010] Flexible connection structure (2);

[0011] The flexible connection structure (2) movably connects the telescopic rod of the cylinder (1) and the valve shaft (5), and comprises a Y-shaped joint (21), a joint pin (22) and a fisheye joint (23); the Y-shaped joint (21) is threadedly connected to the valve shaft (5); the fisheye joint (23) is threadedly connected to the telescopic rod of the cylinder (1); the joint ball bearing of the fisheye joint (23) is located in the U-shaped groove of the Y-shaped joint (21); and the joint pin (22) movably connects the joint ball bearings of the Y-shaped joint (21) and the fisheye joint (23).

[0012] Furthermore, an anti-slip structure (3) is provided at the connection portion between the valve shaft (5) and the Y-shaped joint (21), and the anti-slip structure (3) includes an anti-slip clamp (31) which is a bent plate as a whole, and the anti-slip clamp (31) has a U-shaped clamping groove (31a), and the clamping groove (31a) is detachably fixed to the valve shaft (5) in a direction perpendicular to the axis of the valve shaft (5), and the anti-slip clamp (31) is detachably fixed to the Y-shaped joint (21).

[0013] Furthermore, the anti-slipping fixture (31) is an L-shaped bent plate as a whole and is divided into two mutually perpendicular parts, one part of the anti-slipping fixture (31) is perpendicular to the valve shaft (5) and is provided with a card slot (31a), and the other part of the anti-slipping fixture (31) is parallel to the valve shaft (5) and is provided with an oblong hole (31b), and the oblong hole (31b) is parallel to the valve shaft (5), and the anti-slipping structure (3) is also provided with a fixing screw (32), and the fixing screw (32) is passed through the oblong hole (31b) and is threadedly connected to the Y-shaped joint (21).

[0014] Furthermore, an anti-slip structure (4) is provided at the connection portion between the fisheye joint (23) and the telescopic rod of the cylinder (1), and the anti-slip structure (4) comprises an anti-slip clamp (41) and a fixed base plate (43). The anti-slip clamp (41) is a bent plate as a whole and has a U-shaped clamping groove (41a). The clamping groove (41a) is detachably fixed to the fisheye joint (23) in a direction perpendicular to the axis of the valve shaft (5). The fixed base plate (43) is fixedly connected to the telescopic rod of the cylinder (1), and the anti-slip clamp (41) is detachably fixed to the fixed base plate (43).

[0015] Furthermore, the second anti-slip structure (4) includes a second fixing screw (42) with a nut, and a second fixing hole (41b) is provided on the second anti-slip clamp (41). The second fixing screw (42) passes through the second fixing hole (41b) and is connected to the fixed base plate (43), and is locked by a nut provided therewith.

[0016] Furthermore, the anti-leakage sealing structure (6) comprises:

[0017] an annular main seat (610) fixedly attached to the outer wall (11) of the RTO, wherein the annular main seat (610) surrounds the valve shaft (5);

[0018] An annular graphite packing (66) is fixed to the inner wall of the annular main seat (610). The valve shaft (5) is movably fitted with the graphite packing (66) in the axial direction and uses the graphite packing (66) as a sliding support. The graphite packing (66) is provided in a pair and is spaced apart in the axial direction.

[0019] An annular gas sealing ring (67) surrounds the valve shaft (5), and a pair of graphite packings (66) relatively clamp the gas sealing ring (67) in the axial direction. The gas sealing ring (67) is provided with a compressed air connector (69), which is plugged into an annular main seat (610). The annular main seat (610) is provided with a vent channel (68) extending along its radial direction. The gas sealing ring (67) is provided with an air vent. The compressed air connector (69) is connected to an air compressor. The compressed air connector (69), the vent channel (68), and the air vent of the gas sealing ring (67) are connected in sequence, so that the fitting gap between the gas sealing ring (67) and the valve shaft (5) is filled with a high-pressure sealing gas having a pressure value greater than the air pressure inside the RTO (10).

[0020] Furthermore, the anti-leakage sealing structure (6) further comprises:

[0021] A gland group, the gland group is composed of an annular first gland (62) and a second gland (64), the gland group is provided with a plurality of locking screws (61) surrounding the valve shaft (5) and distributed along the circumferential direction, the first gland (62), the second gland (64), and the annular main seat (610) are distributed in sequence along the axial direction of the valve shaft (5), the locking screws (61) pass through the first gland (62) and the second gland (64) and are then threadedly connected to the annular main seat (610), so that the gland group is fixedly connected to the outer shaft end of the annular main seat (610);

[0022] An annular skeleton oil seal (63), wherein the inner circumference of the first gland (62) is coaxially formed with an annular groove, the skeleton oil seal (63) is fixed in the annular groove, and the inner circumference of the skeleton oil seal (63) is sealed against the valve shaft (5) under the locking action of the locking screw (61);

[0023] The annular backing ring (65) and the second gland (64) have an axial protrusion protruding toward the interior (10) of the RTO. Under the locking action of the locking screw (61), the axial protrusion of the second gland (64) presses the backing ring (65) against one of the graphite packings (66).

[0024] Furthermore, it also includes at least two sets of adjustable supporting wheel structures (7) located inside the RTO (10);

[0025] The supporting wheel structure (7) comprises:

[0026] A supporting wheel (71) for rolling support of the valve shaft (5);

[0027] An upper supporting seat (73), wherein the upper supporting seat (73) is provided with an axle pin (72), and the supporting wheel (71) is rotatably connected to the upper supporting seat (73) via the axle pin (72);

[0028] A lower bracket (76) is located directly below the upper support seat (73);

[0029] Two sets of adjustment components, the upper support seat (73) is connected to the lower bracket (76) through the adjustment components for lifting and adjusting, the two sets of adjustment components are quasi-symmetrically distributed with respect to the central axis of the supporting wheel (71), the number of each set of adjustment components is two, and they are respectively located below the two axial ends of the supporting wheel (71);

[0030] Each adjustment assembly includes an adjustment bolt (74) and a plurality of fixing nuts (75) fitted with the adjustment bolts (74). The adjustment bolts (74) penetrate the upper support seat (73) and the lower bracket (76), and the fixing nuts (75) lock the distance between the upper support seat (73) and the lower bracket (76).

[0031] Furthermore, the upper support seat (73) is provided with four upper adjustment holes (73a) which are passed through from top to bottom and matched with the adjustment components one by one. The upper adjustment holes (73a) are set as oblong holes, and their length directions are parallel to the axial direction of the supporting wheel (71). The adjustment bolts (74) are passed through the upper adjustment holes (73a).

[0032] The beneficial effects of the present invention are:

[0033] 1. Improved sealing scheme. Graphite packing, compressed air and skeleton oil seal form a three-level sealing structure. The three-level seals complement each other, not only preventing the exhaust gas inside the RTO from leaking to the outside, but also ensuring a certain degree of freedom of movement of the valve shaft, slowing down wear and extending service life;

[0034] 2. Use a flexible connection structure to connect the telescopic rod of the cylinder and the valve shaft, and connect the fisheye joint to the Y-shaped joint. Even if the valve shaft and the telescopic rod of the cylinder are not concentric, sufficient axial driving force can be obtained. During the movement, the valve shaft will automatically find the concentricity and compensate for the concentricity deviation to ensure that the switching valve is well sealed. At the same time, it also avoids many shortcomings of the rigid connection between the valve shaft and the telescopic rod of the cylinder;

[0035] 3. Anti-slip structure 1 and anti-slip structure 2 are set. Anti-slip structure 1 fixes the valve shaft and Y-shaped joint, while anti-slip structure 2 fixes the fisheye joint and the telescopic rod of the cylinder. Without affecting the axial and radial movement of the valve shaft, it effectively solves the problem of the switching valve being dislocated during long-term movement.

[0036] 4. An adjustable supporting roller structure is set up, and an adjusting bolt is arranged under the supporting roller to realize the longitudinal adjustment operation of the supporting roller. An upper adjusting hole is arranged on the upper supporting seat to realize the lateral adjustment operation of the supporting roller. By regularly adjusting the longitudinal and lateral positions of the supporting roller, the valve shaft and the anti-leakage sealing structure are always concentric, ensuring the effect of the three-level sealing, reducing the wear of the switching valve shaft, and extending the service life of the valve shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a system layout diagram of the present invention.

[0038] Figure 2 It is a cross-sectional view of the anti-leakage sealing structure.

[0039] Figure 3 It is a structural diagram of a flexible connection structure.

[0040] Figure 4 It is a detailed schematic diagram of the flexible connection structure.

[0041] Figure 5 It is a structural diagram of an anti-dropping card component.

[0042] Figure 6 It is a structural diagram of the second anti-dropping card.

[0043] Figure 7 It is a schematic diagram of an adjustable supporting wheel structure.

[0044] Figure 8 yes Figure 7 Top view in . DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-8 The present invention is further described with reference to the accompanying drawings and specific examples.

[0046] In the existing technology, during the operation of the switching valve, due to the harsh on-site environment and untimely inspection and maintenance, the switching valve is prone to wear, leakage, falling off, and difficulty in adjustment, which seriously affects the RTO operation efficiency.

[0047] like Figure 1 As shown, a tower-type three-chamber RTO switching valve mechanism includes:

[0048] Cylinder 1 installed outside the RTO chamber;

[0049] A round rod-shaped valve shaft 5 moves horizontally through the outer wall 11 of the RTO and extends into the interior 10 of the RTO, and the telescopic rod of the cylinder 1 is connected to the valve shaft 5;

[0050] The switching valve plate 8, which is fixedly sleeved on the valve shaft 5 and located inside the RTO 10 and is used to open and close the valve port 9, is driven by the cylinder 1 to translate the valve shaft 5, driving the switching valve plate 8 to translate to open and close the valve port 9;

[0051] Flexible connection structure 2, such as Figure 3 、 4 As shown, the flexible connection structure 2 movably connects the telescopic rod of the cylinder 1 and the valve shaft 5, including a Y-shaped joint 21, a joint pin 22 and a fisheye joint 23. The Y-shaped joint 21 is threadedly connected to the valve shaft 5, and the fisheye joint 23 is threadedly connected to the telescopic rod of the cylinder 1. The joint ball bearing of the fisheye joint 23 is located in the U-shaped groove of the Y-shaped joint 21, and the joint pin 22 movably connects the joint ball bearings of the Y-shaped joint 21 and the fisheye joint 23;

[0052] The anti-leakage sealing structure 6 is an annular structure as a whole and seals the fitting gap between the valve shaft 5 and the RTO outer wall 11.

[0053] Among them, an anti-slip structure 3 is provided at the connection position between the valve shaft 5 and the Y-shaped joint 21. The anti-slip structure 3 includes an anti-slip clamp 31 which is a bent plate as a whole. The anti-slip clamp 31 has a U-shaped clamping groove 31a. The clamping groove 31a is detachably fixed to the valve shaft 5 in a direction perpendicular to the axis of the valve shaft 5. The anti-slip clamp 31 is detachably fixed to the Y-shaped joint 21.

[0054] The above-mentioned anti-slipping clamp 31 is an L-shaped bent plate as a whole and is divided into two mutually perpendicular parts. One part of the anti-slipping clamp 31 is perpendicular to the valve shaft 5 and is provided with a clamping groove 31a, and the other part of the anti-slipping clamp 31 is parallel to the valve shaft 5 and is provided with an oblong hole 31b. The oblong hole 31b is parallel to the valve shaft 5. The anti-slipping structure 3 is also provided with a fixing screw 32, which is inserted into the oblong hole 31b and is threadedly connected to the Y-shaped connector 21.

[0055] An anti-slip structure 4 is provided at the connection portion between the fisheye joint 23 and the telescopic rod of the cylinder 1. The anti-slip structure 4 includes an anti-slip clamp 41 and a fixed base plate 43. The anti-slip clamp 41 is a bent plate as a whole and has a U-shaped slot 41a. The slot 41a is detachably fixed to the fisheye joint 23 in a direction perpendicular to the axis of the valve shaft 5. The fixed base plate 43 is fixed to the telescopic rod of the cylinder 1. The anti-slip clamp 41 is detachably fixed to the fixed base plate 43.

[0056] The above-mentioned anti-slip structure 4 includes a fixing screw 42 with a nut. A fixing hole 41b is opened on the anti-slip clamp 41. The fixing screw 42 passes through the fixing hole 41b and the fixing base plate 43, and is locked by its own nut.

[0057] The anti-leakage sealing structure 6 includes:

[0058] An annular main seat 610 is fixedly and sealingly attached to the outer wall 11 of the RTO, and the annular main seat 610 surrounds the valve shaft 5;

[0059] An annular graphite packing 66 is fixed to the inner wall of the annular main seat 610. The graphite packing 66 is mainly made of graphite wire reinforced with various reinforcing fibers and metal wires (steel wire, copper wire, nickel wire, carbon fiber, pre-oxidized wire, glass yarn), and is carefully woven. It is suitable for dynamic sealing under high temperature and high pressure conditions. The valve shaft 5 is axially movable through the graphite packing 66 and uses the graphite packing 66 as a sliding support. There is a pair of graphite packings 66, which are spaced apart along the axial direction.

[0060] An annular gas seal ring 67 surrounds the valve shaft 5. A pair of graphite packings 66 clamp the gas seal ring 67 relative to each other in the axial direction. The gas seal ring 67 is equipped with a compressed air connector 69, which is plugged into the annular main seat 610. The annular main seat 610 is provided with a vent 68 extending radially thereof. The gas seal ring 67 is provided with an air vent. The compressed air connector 69 is connected to the air compressor. The compressed air connector 69, the vent 68, and the air vent of the gas seal ring 67 are connected in sequence, so that the fitting gap between the gas seal ring 67 and the valve shaft 5 is filled with a high-pressure sealing gas with a pressure value greater than 10% of the internal pressure of the RTO.

[0061] The gland assembly consists of an annular first gland 62 and a second gland 64. The gland assembly is equipped with a plurality of locking screws 61 that surround the valve shaft 5 and are distributed circumferentially. The first gland 62, the second gland 64, and the annular main seat 610 are sequentially distributed along the axial direction of the valve shaft 5. The locking screws 61 pass through the first gland 62 and the second gland 64 and are threadedly connected to the annular main seat 610, so that the gland assembly is fixedly connected to the outer shaft end of the annular main seat 610.

[0062] The annular skeleton oil seal 63 has an annular groove coaxially formed on the inner circumference of the first gland 62. The skeleton oil seal 63 is fixed in the annular groove. Under the locking action of the locking screw 61, the inner circumference of the skeleton oil seal 63 is sealed against the valve shaft 5.

[0063] The annular backing ring 65 and the second gland 64 have an axial protrusion protruding toward the interior 10 of the RTO. Under the locking action of the locking screw 61 , the axial protrusion of the second gland 64 presses the backing ring 65 against one of the graphite packings 66 .

[0064] In addition, the mechanism also includes two sets of adjustable roller structures 7 located inside the RTO 10.

[0065] The above-mentioned supporting wheel structure 7 includes:

[0066] A supporting wheel 71 that rolls and supports the valve shaft 5;

[0067] The upper support seat 73 is provided with an axle pin 72 , and the supporting wheel 71 is rotatably connected to the upper support seat 73 via the axle pin 72 ;

[0068] The lower bracket 76 is located directly below the upper bracket 73;

[0069] There are two sets of adjustment components, and the upper support seat 73 is connected to the lower bracket 76 through the adjustment components for lifting and lowering adjustment. The two sets of adjustment components are quasi-symmetrically distributed around the central axis of the supporting wheel 71. There are two adjustment components in each set, and they are respectively located below the two axial ends of the supporting wheel 71.

[0070] Each adjustment assembly includes an adjustment bolt 74 and a plurality of fixing nuts 75 that fit the adjustment bolt 74 . The adjustment bolt 74 passes through the upper bracket 73 and the lower bracket 76 , and the fixing nut 75 locks the distance between the upper bracket 73 and the lower bracket 76 .

[0071] The upper support seat 73 is provided with four upper adjustment holes 73a which pass through the upper and lower parts and match the adjustment components one by one. The upper adjustment holes 73a are set as oblong holes, and their length directions are parallel to the axial direction of the supporting wheel 71. The adjustment bolts 74 are passed through the upper adjustment holes 73a.

[0072] This embodiment has the following advantages:

[0073] Graphite packing 66, compressed air and skeleton oil seal 63 form a three-level sealing structure ( Figure 2 As shown in the anti-leakage sealing structure 6), the valve shaft 5 moves horizontally (axially) under the drive of the cylinder 1 and is in close contact with the above-mentioned three-level sealing structure.

[0074] The first-level sealing solution is: the graphite packing 66 contacts the inner circular surface of the valve shaft 5, which is surface contact. The graphite packing 66 is made of graphite and has a lubricating effect. While ensuring the sealing performance of the valve shaft 5, the valve shaft 5 can also move horizontally.

[0075] The secondary sealing solution is: the compressed air connector 69 is connected to an air compressor or other types of pressure air sources, and the high-pressure air enters the gap between the air sealing ring 67 and the valve shaft 5 through the ventilation channel 68 and the air holes of the air sealing ring 67. 0.4-0.6MPa compressed air is introduced into the air sealing ring 67, so that the internal air pressure of the air sealing ring 67 is greater than the air pressure inside the RTO 10. The air pressure difference ensures that the exhaust gas inside the RTO 10 will not escape to the outside of the equipment, thereby achieving a good sealing effect.

[0076] The three-stage sealing solution is: the skeleton oil seal 63 is in line contact with the valve shaft 5. Under the action of the internal and external pressure difference of the RTO, the sealing lip of the skeleton oil seal 63 and the contact part of the valve shaft 5 form a crescent surface, preventing the leakage of exhaust gas, thereby realizing the sealing of the valve shaft 5.

[0077] In the above-mentioned three-stage sealing design, the three-stage sealing complements each other, which not only prevents the exhaust gas inside the RTO 10 from leaking to the outside, but also ensures that the switching valve shaft 5 has a certain degree of freedom of movement, slows down the wear of the switching valve shaft 5, and extends the service life of the valve shaft 5, achieving twice the result with half the effort.

[0078] This embodiment provides a flexible connection structure 2, the valve shaft 5 is connected to the Y-shaped joint 21 through a threaded pair, the fisheye joint 23 is connected to the telescopic rod of the cylinder 1 through a threaded pair, the Y-shaped joint 21 and the fisheye joint 23 are connected by a joint pin 22, and the telescopic rod of the cylinder 1 pushes the valve shaft 5 to move horizontally. Even if the valve shaft 5 and the telescopic rod of the cylinder 1 are not concentric, sufficient axial driving force can be obtained, and the concentricity is automatically found during the movement to compensate for the concentricity deviation, thereby ensuring that the switching valve is well sealed. At the same time, many disadvantages of the rigid connection between the valve shaft 5 and the telescopic rod of the cylinder 1 are avoided.

[0079] The switching valve shaft 5 is connected to the Y-shaped joint 21 through a threaded pair, and the fisheye joint 23 is connected to the telescopic rod of the cylinder 1 through a threaded pair, thereby ensuring that the valve shaft 5 does not come off the axis during axial operation.

[0080] Combine Figure 3-5 As shown, the slot 31a of the anti-dropout clamp 31 holds the valve shaft 5 and is fixed to the Y-shaped connector 21 by a fixing screw 32, ensuring that the valve shaft 5 and the Y-shaped connector 21 are integrated and can move coaxially.

[0081] Combine Figure 3 、 4 As shown in Figures 6 and 7, the second retaining groove 41a of the second anti-slip retaining member 41 holds the fisheye connector 23 and is secured to the fixed base plate 43 of the telescopic rod of the cylinder 1 via the second fixing screw 42, ensuring that the fisheye connector 23 is fixed to the telescopic rod of the cylinder 1 and can move coaxially. The first and second anti-slip retaining structures 3 and 4 address the issues of loosening and decoupling. This interlocking design leverages the respective advantages of the threaded pair and the anti-slip retaining structure, effectively resolving the issue of decoupling during long-term operation of the switching valve without affecting the axial and radial movement of the valve shaft 5.

[0082] like Figure 1 、 7 As shown in Figures 8 and 9, an adjustable support roller 71 supports the valve shaft 5 for horizontal movement. The support roller 71 is connected to the upper support seat 73 via a shaft pin 72, which allows the support roller 71 to rotate. The upper support seat 73 is connected to the lower bracket 76 via an adjustment bolt 74, which allows the support roller 71 to be adjusted longitudinally (up and down). The upper support seat 73 is equipped with an upper adjustment hole 73a, which allows the support roller 71 to be adjusted transversely (horizontally). By regularly adjusting the longitudinal and transverse positions of the support roller 71, the valve shaft 5 and the anti-leakage sealing structure 6 (three-stage sealing component) are always concentric, ensuring the three-stage sealing effect, reducing wear on the valve shaft 5, and extending the service life of the valve shaft 5.

[0083] The above are preferred embodiments of the present invention. Those skilled in the art may make various changes or improvements based on the above. Without departing from the overall concept of the present invention, these changes or improvements should fall within the scope of protection required by the present invention.

Claims

1. A tower-type three-chamber RTO switching valve mechanism, comprising: A cylinder (1) mounted outside the RTO chamber; A round rod-shaped valve shaft (5) moves horizontally through the outer wall (11) of the RTO and extends into the interior (10) of the RTO, and the telescopic rod of the cylinder (1) is connected to the valve shaft (5); A switching valve plate (8) fixedly sleeved on the valve shaft (5) and located inside the RTO (10) for opening and closing the valve port (9); It is characterized by further comprising: An anti-leakage sealing structure (6), the anti-leakage sealing structure (6) being an annular structure as a whole and sealing the fitting gap between the valve shaft (5) and the RTO outer wall (11); Flexible connection structure (2); The flexible connection structure (2) movably connects the telescopic rod of the cylinder (1) and the valve shaft (5), and comprises a Y-shaped joint (21), a joint pin (22) and a fisheye joint (23); the Y-shaped joint (21) is threadedly connected to the valve shaft (5); the fisheye joint (23) is threadedly connected to the telescopic rod of the cylinder (1); the joint ball bearing of the fisheye joint (23) is located in the U-shaped groove of the Y-shaped joint (21); and the joint pin (22) movably connects the joint ball bearings of the Y-shaped joint (21) and the fisheye joint (23); An anti-slip structure (3) is provided at the connection portion between the valve shaft (5) and the Y-shaped joint (21), the anti-slip structure (3) comprising an anti-slip clamp (31) which is a bent plate as a whole, the anti-slip clamp (31) having a U-shaped clamping groove (31a), the clamping groove (31a) being detachably fixed to the valve shaft (5) in a direction perpendicular to the axis of the valve shaft (5), and the anti-slip clamp (31) being detachably fixed to the Y-shaped joint (21); An anti-slip structure (4) is provided at the connection portion between the fisheye joint (23) and the telescopic rod of the cylinder (1). The anti-slip structure (4) comprises an anti-slip clamp (41) and a fixed base plate (43). The anti-slip clamp (41) is a bent plate as a whole and has a U-shaped clamping groove (41a). The clamping groove (41a) is detachably fixed to the fisheye joint (23) in a direction perpendicular to the axis of the valve shaft (5). The fixed base plate (43) is fixed to the telescopic rod of the cylinder (1). The anti-slip clamp (41) is detachably fixed to the fixed base plate (43).

2. The tower-type three-chamber RTO switching valve mechanism according to claim 1, characterized in that: The anti-slipping fixture (31) is an L-shaped bent plate as a whole and is divided into two mutually perpendicular parts. One part of the anti-slipping fixture (31) is perpendicular to the valve shaft (5) and is provided with a card slot (31a). The other part of the anti-slipping fixture (31) is parallel to the valve shaft (5) and is provided with an oblong hole (31b). The oblong hole (31b) is parallel to the valve shaft (5). The anti-slipping structure (3) is also provided with a fixing screw (32). The fixing screw (32) is passed through the oblong hole (31b) and is threadedly connected to the Y-shaped connector (21).

3. The tower-type three-chamber RTO switching valve mechanism according to claim 1, characterized in that: The second anti-slip structure (4) includes a second fixing screw (42) with a nut, and a second fixing hole (41b) is provided on the second anti-slip clamp (41). The second fixing screw (42) passes through the second fixing hole (41b) and is connected to the fixed base plate (43), and is locked by a nut provided therewith.

4. The tower-type three-chamber RTO switching valve mechanism according to claim 1, characterized in that: The anti-leakage sealing structure (6) comprises: an annular main seat (610) fixedly attached to the outer wall (11) of the RTO, wherein the annular main seat (610) surrounds the valve shaft (5); an annular graphite packing (66) fixed to the inner wall of the annular main seat (610); the valve shaft (5) is movably fitted with the graphite packing (66) in the axial direction and uses the graphite packing (66) as a sliding support; a pair of graphite packings (66) are provided and spaced apart in the axial direction; An annular air seal ring (67) surrounding the valve shaft (5) is provided. A pair of graphite packings (66) relatively clamp the air seal ring (67) in the axial direction. The air seal ring (67) is provided with a compressed air connector (69). The compressed air connector (69) is plugged into the annular main seat (610). The annular main seat (610) is provided with a vent channel (68) extending along its radial direction. The air seal ring (67) is provided with an air vent. The compressed air connector (69) is connected to the air compressor. The compressed air connector (69), the vent channel (68), and the air vent of the air seal ring (67) are connected in sequence so that the fitting gap between the air seal ring (67) and the valve shaft (5) is filled with a high-pressure sealing gas having a pressure value greater than the air pressure inside the RTO (10).

5. The tower-type three-chamber RTO switching valve mechanism according to claim 4, characterized in that: The anti-leakage sealing structure (6) further comprises: A gland group, the gland group is composed of an annular first gland (62) and a second gland (64), the gland group is provided with a plurality of locking screws (61) surrounding the valve shaft (5) and distributed along the circumferential direction, the first gland (62), the second gland (64), and the annular main seat (610) are distributed in sequence along the axial direction of the valve shaft (5), the locking screws (61) pass through the first gland (62) and the second gland (64) and are then threadedly connected to the annular main seat (610), so that the gland group is fixedly connected to the outer shaft end of the annular main seat (610); An annular skeleton oil seal (63), wherein the inner circumference of the first gland (62) is coaxially formed with an annular groove, the skeleton oil seal (63) is fixed in the annular groove, and the inner circumference of the skeleton oil seal (63) is sealed against the valve shaft (5) under the locking action of the locking screw (61); The annular backing ring (65) and the second gland (64) have an axial protrusion protruding toward the interior (10) of the RTO, and under the locking action of the locking screw (61), the axial protrusion of the second gland (64) presses the backing ring (65) against one of the graphite packings (66).

6. The tower-type three-chamber RTO switching valve mechanism according to claim 1, characterized in that: It also includes at least two sets of adjustable roller structures (7) located inside the RTO (10); The supporting wheel structure (7) comprises: A supporting wheel (71) for rolling support of the valve shaft (5); An upper supporting seat (73), wherein the upper supporting seat (73) is provided with an axle pin (72), and the supporting wheel (71) is rotatably connected to the upper supporting seat (73) via the axle pin (72); A lower bracket (76) is located directly below the upper support seat (73); Two sets of adjustment components, the upper support seat (73) is connected to the lower bracket (76) through the adjustment components, and the two sets of adjustment components are quasi-symmetrically distributed with the central axis of the supporting wheel (71). The number of each set of adjustment components is two, and they are respectively located below the two axial ends of the supporting wheel (71); Each adjustment assembly includes an adjustment bolt (74) and a plurality of fixing nuts (75) fitted with the adjustment bolts (74). The adjustment bolts (74) penetrate the upper support seat (73) and the lower bracket (76), and the fixing nuts (75) lock the distance between the upper support seat (73) and the lower bracket (76).

7. The tower-type three-chamber RTO switching valve mechanism according to claim 6, characterized in that: The upper support seat (73) is provided with four upper adjustment holes (73a) that pass through the upper and lower parts and match the adjustment components one by one. The upper adjustment holes (73a) are configured as oblong holes, and their length directions are parallel to the axial direction of the supporting wheel (71). The adjustment bolts (74) are passed through the upper adjustment holes (73a).

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