A four-way damper valve and RTO system

Abstract

The application discloses a four-way air valve and an RTO system, and belongs to the valve field.The four-way air valve comprises a valve body, an actuator, valve rods, a connecting rod assembly, a valve plate and baffles.The valve body is provided with a first air port, a second air port, a third air port and a fourth air port.The second air port, the third air port and the fourth air port are all rotationally connected with the valve plate through the valve rods.The actuator is arranged on one side of the valve body.The valve rod of the second air port extends to the outside of the valve body and is connected with the actuator.The other ends of all the valve rods extend to the outside of the valve body and are connected with the connecting rod assembly.The upper and lower side walls in the third air port and the fourth air port are both provided with the baffles.The baffles on the upper side and the lower side are respectively arranged on the opposite sides of the valve plate.The four-way air valve is innovatively structured, and the technical problems of the traditional rotary RTO, such as high mechanical failure rate, frequent sealing failure, unstable purification efficiency and the like, are fundamentally solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of valves, and particularly relates to a four-way air valve and an RTO system. BACKGROUND

[0002] In the field of industrial waste gas treatment, efficient treatment of volatile organic compounds (VOCs) is a key link to control air pollution and achieve green production. As the mainstream equipment for treating VOCs, the regenerative thermal oxidizer (RTO) has become an important part of the industrial waste gas treatment system, with the core principle of high-temperature oxidation decomposition of organic waste gas, combined with the heat recovery technology of heat storage materials, and with the advantages of high purification efficiency and good energy saving.

[0003] The core operating mechanism of the traditional rotary RTO relies on a rotary valve to realize the dynamic switching of the functional partitions of the heat storage chamber. The specific working principle is as follows: the rotary valve cooperates with the heat storage chamber, changes the airflow channel through the rotary motion of the valve disc, and makes different areas of the heat storage chamber alternately assume the functions of preheating intake air, heat storage of exhaust air, and purging and cleaning.

[0004] However, this structure design based on the rotary valve has significant defects, which seriously affects the stability, economy and purification effect of the equipment:

[0005] Firstly, the rotary valve structure is extremely complex, usually requiring precise mechanical transmission mechanisms, high-temperature-resistant sealing components and precise positioning systems to ensure precise partition switching in high-temperature environments. In the long-term operation, problems such as valve disc wear, sealing component aging and failure, and transmission system jamming occur frequently, directly causing equipment downtime and affecting the continuity of industrial production.

[0006] Secondly, the dynamic sealing between the rotary valve and the heat storage chamber is a long-standing technical problem. Under high-temperature and frequent rotation conditions, the aging rate of the sealing component is significantly accelerated, and sealing failure problems are prone to occur. This directly reduces the purification efficiency of the equipment, and even causes emission to exceed the standard.

[0007] In addition, the purging link design of the traditional rotary RTO has obvious deficiencies. Currently, the purging gas is directly extracted from the outside air, and the dust, particulate matter and other impurities contained in the unfiltered air will enter the heat storage chamber during the purging process, gradually depositing and clogging the pore channels of the heat storage material. This not only reduces the heat exchange efficiency of the heat storage material, affecting the heat recovery effect, but also increases the system resistance, leading to increased energy consumption, and frequent downtime for cleaning the heat storage material, further increasing the maintenance cost of the equipment. SUMMARY

[0008] The present application aims to provide a four-way air valve and RTO system to overcome at least one of the above-mentioned deficiencies in the prior art.

[0009] To achieve the above object, the present application adopts the following technical solutions:

[0010] The four-way air valve provided by the present application comprises a valve body, an actuator, valve rods, a connecting rod assembly, valve plates, and baffles. The valve body has a first air port, a second air port, a third air port, and a fourth air port. The second air port, the third air port, and the fourth air port are each connected with a valve plate through a valve rod. The actuator is arranged on one side of the valve body. One end of the valve rod of the second air port extends to the outside of the valve body and is connected with the actuator. The other end of each valve rod extends to the outside of the valve body and is connected with the connecting rod assembly. The upper and lower sidewalls inside the third air port and the fourth air port are each provided with a baffle. The baffles on the upper and lower sides are respectively located on the opposite sides of the valve plate.

[0011] Preferably, the connecting rod assembly comprises a first connecting rod, a first elastic member, a second elastic member, and a second connecting rod. The valve rod of the second air port has a first transmission block and a second transmission block. One end of the first connecting rod is in transmission connection with the valve rod of the second air port through the first transmission block. The other end of the first connecting rod is fixedly connected with the valve rod of the third air port. One end of the first elastic member is connected to the third air port. The other end of the first elastic member is connected with the first connecting rod. The first elastic member is located on one side of the third air port. One end of the second connecting rod is in transmission connection with the valve rod of the second air port through the second transmission block. The other end of the second connecting rod is fixedly connected with the valve rod of the fourth air port. One end of the second elastic member is connected to the fourth air port. The other end of the second elastic member is connected with the second connecting rod. The second elastic member is located on one side of the fourth air port.

[0012] Preferably, the first connecting rod comprises a first connecting arm, a second connecting arm, a third connecting arm, a first pin shaft and a second pin shaft, one end of the first connecting arm is provided with a first arc-shaped slot, the first transmission block extends into the first arc-shaped slot, the other end of the first connecting arm is hingedly connected to one end of the second connecting arm through the first pin shaft, the other end of the second connecting arm is hingedly connected to one end of the third connecting arm through the second pin shaft, the other end of the third connecting arm is fixedly connected to the valve rod of the third air port, one end of the first elastic member is connected to the second pin shaft, in the initial state, the first elastic member is in the contracted state, the first transmission block abuts against the end wall of the first arc-shaped slot away from the first elastic member, the second connecting rod comprises a fourth connecting arm, a fifth connecting arm, a sixth connecting arm, a third pin shaft and a fourth pin shaft, one end of the fourth connecting arm is provided with a second arc-shaped slot, the second transmission block extends into the second arc-shaped slot, the other end of the fourth connecting arm is hingedly connected to one end of the fifth connecting arm through the third pin shaft, the other end of the fifth connecting arm is hingedly connected to one end of the sixth connecting arm through the fourth pin shaft, the other end of the sixth connecting arm is fixedly connected to the valve rod of the fourth air port, one end of the second elastic member is connected to the fourth pin shaft, in the initial state, the second elastic member is in the stretched state, the second transmission block abuts against the end wall of the second arc-shaped slot away from the second elastic member, the arc of the first arc-shaped slot and the arc of the second arc-shaped slot are both 90°.

[0013] Preferably, the PLC controller is further comprised, and the actuator is electrically connected with the PLC controller.

[0014] The application further provides an RTO system, which comprises a bottom plate, a first support column, a waste gas inlet ring, a second support column, a purge gas inlet ring, a four-way air valve, a regenerator, a combustion chamber, an outlet channel and a filter assembly, the four-way air valve is the four-way air valve described above, the first support column and the filter assembly are fixed on the top of the bottom plate, the waste gas inlet ring is fixed on the top of the first support column, the second support column is fixed on the top of the waste gas inlet ring, the regenerator is fixed on the top of the second support column, the combustion chamber is arranged on the top of the regenerator and communicates with the regenerator, the outlet channel is fixed on the bottom of the regenerator, the regenerator is provided with a plurality of sub-zones, each sub-zone is provided with one four-way air valve which communicates with the sub-zone, the first air port of each four-way air valve communicates with the sub-zone, the second air port of each four-way air valve communicates with the waste gas inlet ring, the third air port of each four-way air valve communicates with the outlet channel, and the fourth air port of each four-way air valve communicates with the purge gas inlet ring, the inlet end of the purge gas inlet ring communicates with the outlet end of the filter assembly.

[0015] Preferably, the inner cavity of the regenerator is equally divided into twelve sub-zones by a partition plate, each sub-zone is divided into two upper and lower packing zones by a partition net, each packing zone is filled with honeycomb ceramic regenerator, and the inner cavity of the regenerator is in a circular ring shape or a square ring shape.

[0016] Preferably, the gas outlet channel comprises a gas outlet cylinder and a gas outlet pipe, the top of the gas outlet cylinder is fixed at the center of the bottom of the heat storage chamber, the bottom of the gas outlet cylinder is fixedly connected with the gas outlet pipe, the bottom end of the gas outlet pipe penetrates through the exhaust gas inlet ring and extends below the exhaust gas inlet ring.

[0017] Preferably, the filter assembly comprises a sliding block, a rotating disc, a first bearing, a first pipe, a second pipe, a second bearing, a first valve, a filter box, a third pipe, a second valve, a stand, a gear ring, a connecting rod and a driving member, the stand is fixed to the top of the bottom plate, the exhaust gas inlet ring and the right side wall of the heat storage chamber and the left side wall of the stand are all fixed with the sliding block, the rotating disc has an annular sliding groove which is in sliding fit with the sliding block, the interiors of the left and right rotating discs are both provided with cavities, the left and right rotating discs are connected through the connecting rod, the middle portions of the outer side walls of the left and right rotating discs are both fixed with the first bearing, each first bearing is rotatably connected with the first pipe, and each first pipe is in communication with the cavity of the rotating disc, the left first pipe is fixedly communicated with the inlet end of the purge gas inlet ring, the right first pipe is fixed to the stand and is in communication with the purge gas source, the filter box is provided with two filter boxes, the left and right side walls of the upper portion of each filter box are both fixed with the second bearing, each second bearing is rotatably connected with the second pipe, the left end of the left second pipe is fixedly communicated with the cavity of the left rotating disc, and the left second pipe is provided with the first valve, the right end of the right second pipe is fixed to the left side wall of the right rotating disc, the right cavity is fixedly communicated with two third pipes, each third pipe is provided with the second valve, and the two third pipes are fixedly communicated with the lower portions of the two filter boxes, the two filter boxes are arranged in an up-down distribution mode, the outer wall of the right rotating disc is fixedly sleeved with the gear ring, and the driving member drives the gear ring to rotate.

[0018] Preferably, the driving member comprises a third bearing seat, a fourth bearing seat, a rotating shaft, a gear wheel, a worm wheel, a worm and a hand wheel, the lower portion of the stand is fixed with the third bearing seat and the fourth bearing seat, the left end of the rotating shaft penetrates through the third bearing seat and is fixed with the gear wheel, the gear wheel is in mesh with the gear ring, the right end of the rotating shaft is fixed with the worm wheel, the bottom end of the worm is inserted into the fourth bearing seat, the worm is in mesh with the worm wheel, and the top end of the worm is fixed with the hand wheel.

[0019] Preferably, the filter box comprises a box body, a filter plate, a sealing door and an insertion strip, the left and right side walls of the interior of the box body are both provided with an insertion slot, the left and right side walls of the filter plate are both provided with the insertion strip, the insertion strip is inserted into the insertion slot, the second bearing is located above the filter plate, the filter plate is located above the position where the third pipe is communicated with the box body, and the front side of the box body is provided with the sealing door.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. The structural innovation of the four-way valve fundamentally solves the technical problems of high mechanical failure rate, frequent sealing failure and unstable purification efficiency of the traditional rotary RTO.

[0022] 2. Only one actuator is needed to cooperate with the linkage assembly to realize multi-station control, without the need to configure a driving device for each tuyere, which greatly reduces the overall size of the valve body and is suitable for installation in narrow spaces.

[0023] 3. The mechanical linkage structure is used to replace multi-actuator cooperative control, which not only reduces the procurement and maintenance costs, the number of electrical control nodes and the failure probability by reducing the number of actuators, but also avoids synchronization errors or delays caused by time sequence differences, thereby improving the accuracy and stability of airflow switching.

[0024] 4. The first elastic member and the second elastic member can pull the corresponding first linkage member and the second linkage member to rotate and close the valve plate after the actuator force is removed, without the need for additional energy and with the help of pre-tightening force to realize mechanical self-holding of the valve plate closure, thereby eliminating the synchronization error of the traditional multi-actuator.

[0025] 5. The first arc-shaped groove and the second arc-shaped groove respectively limit the movement paths of the first transmission block and the second transmission block, realizing segmented control of the idle stroke and the driving stroke to ensure accurate driving of the corresponding valve plate by the actuator, and cooperating with the double three-arm hinged structure to avoid mis-triggering of adjacent valve plates and realize time sequence peak control of multiple valve plates, thereby completing three-station switching by a single actuator without complex structure, and improving switching stability.

[0026] 6. The complex rotary valve of the traditional rotary RTO is abandoned, and a structure of a fixed heat storage chamber and a single four-way air valve is used to control a single partition, thereby eliminating the need for a precise rotary transmission mechanism and a dynamic sealing assembly, fundamentally reducing the risk of mechanical failure, significantly improving the stability of equipment operation, and filtering the purge gas through a filter assembly to reduce blockage and maintenance costs.

[0027] 7. A single partition can realize three-station switching through only one four-way air valve, thereby reducing pipeline components, reducing installation space requirements, manufacturing costs and maintenance costs, and making the control system more simple and the synchronization more easily guaranteed.

[0028] 8. The static structure reduces heat loss caused by poor rotary sealing, further reduces auxiliary heating energy consumption, and is particularly suitable for high-concentration VOCs waste gas treatment scenarios.

[0029] 9. Each partition and four-way air valve is independently arranged, and can be individually repaired when a local fault occurs, without the need for shutdown and overall maintenance.

[0030] 10. Through the design of the upper and lower distribution of the double filter boxes and the rotation switching of the rotary disc, cooperating with the opening and closing control of the first valve and the second valve, the filter plate replacement can be completed while the purge gas is continuously supplied, thereby avoiding the influence of equipment shutdown on production continuity.

[0031] 11. After the filter box position is changed, the original upper filter box is moved to the lower position. The filter plates can be disassembled and installed without the need to set up climbing tools, which simplifies the operation process, reduces costs, and improves work safety.

[0032] 12. The cooperation between the second pipe and the second bearing ensures that the bottom of the filter box always faces downwards when the turntable rotates, preventing backflow of impurities into the filter box and ensuring stable filtration function.

[0033] 13. The purely manual mechanical structure of the filter assembly makes operation simple and reduces the complexity of malfunctions and maintenance.

[0034] 14. The use of worm gear and worm shaft for self-locking ensures stable locking of the filter box position after switching, preventing accidental rotation, improving operational safety, and enhancing equipment reliability. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the ventilation valve in Embodiment 1 of the present invention (when the actuator is in the 0° position).

[0036] Figure 2 This is a schematic diagram of the cooperation structure between the first connecting rod and the first transmission block in Embodiment 1 of the present invention (when the actuator is in the 0° position).

[0037] Figure 3 This is a schematic diagram of the cooperation structure of the second connecting rod and the second transmission block in Embodiment 1 of the present invention (when the actuator is in the 0° position).

[0038] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention (when the actuator is in the 90° position).

[0039] Figure 5 This is a schematic diagram of the cooperation structure between the first connecting rod and the first transmission block in Embodiment 1 of the present invention (when the actuator is in the 90° position).

[0040] Figure 6 This is a schematic diagram of the cooperation structure of the second connecting rod and the second transmission block in Embodiment 1 of the present invention (when the actuator is in the 90° position).

[0041] Figure 7 This is a schematic diagram of the structure of Embodiment 1 of the present invention (when the actuator is in the 180° position).

[0042] Figure 8 This is a schematic diagram of the cooperation structure between the first connecting rod and the first transmission block in Embodiment 1 of the present invention (when the actuator is in the 180° position).

[0043] Figure 9 This is a schematic diagram of the cooperation structure of the second connecting rod and the second transmission block in Embodiment 1 of the present invention (when the actuator is in the 180° position).

[0044] Figure 10 is a control block diagram of the embodiment one of the present application.

[0045] Figure 11 is a structural schematic diagram of the embodiment two of the present application.

[0046] Figure 12 is a partial three-dimensional structural schematic diagram (first perspective) of the embodiment two of the present application.

[0047] Figure 13 is a top view structural schematic diagram of the heat storage chamber of the embodiment two of the present application (except the honeycomb ceramic heat storage body).

[0048] Figure 14 is a top view structural schematic diagram of the heat storage chamber of the embodiment two of the present application.

[0049] Figure 15 is Figure 14 is a sectional view structural schematic diagram in A-A direction.

[0050] Figure 16 is a partial three-dimensional structural schematic diagram (second perspective) of the embodiment two of the present application.

[0051] Figure 17 is a structural schematic diagram of the filter assembly of the embodiment two of the present application.

[0052] Figure 18 is a partial sectional view structural schematic diagram of the filter assembly of the embodiment two of the present application.

[0053] The marks in the drawings are: 1-first support, 2-waste gas inlet ring, 3-second support, 4-purge inlet ring, 5-four-way valve, 6-regenerator, 7-combustion chamber, 8-outlet passage, 9-division, 10-baffle, 11-mesh, 12-packing zone, 13-honeycomb ceramic regenerator, 81-outlet cylinder, 82-outlet pipe, 51-valve body, 52-actuator, 53-valve rod, 54-link assembly, 55-valve plate, 511-first air port, 512-second air port, 513-third air port, 514-fourth air port, 541-first link piece, 542-first elastic piece, 543-second elastic piece, 544-second link piece, 56-first transmission block, 57-second transmission block, 5411-first connecting arm, 5412-second connecting arm, 5413-third connecting arm, 5414-first pin shaft, 5415-second pin shaft, 5416-first arc-shaped slot, 5441-fourth connecting arm, 5442-fifth connecting arm, 5443-sixth connecting arm, 5444-third pin shaft, 5445-fourth pin shaft, 5446-second arc-shaped slot, 58-PLC controller, 59-baffle, 14-bottom plate, 15-filtering assembly, 151-sliding block, 152-rotating disc, 153-first bearing, 154-first pipe, 155-second pipe, 156-second bearing, 157-first valve, 158-filter box, 159-driving piece, 1510-third pipe, 1511-second valve, 1512-stand, 1513-toothed ring, 1514-connecting rod, 1515-annular sliding slot, 1516-cavity, 1591-third bearing seat, 1592-fourth bearing seat, 1593-rotating shaft, 1594-gear, 1595-worm wheel, 1596-worm, 1597-hand wheel, 1581-box body, 1582-filter plate, 1583-sealing door, 1584-insert strip, 1585-insert slot. DETAILED DESCRIPTION

[0054] The application will be further described in conjunction with the drawings and specific embodiments.

[0055] The contents not described in detail in the specification belong to the prior art known to those skilled in the art. In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0056] Example 1:

[0057] like Figures 1 to 10 As shown, the four-ventilation valve provided in this embodiment includes a valve body 51, an actuator 52, a valve stem 53, a connecting rod assembly 54, a valve plate 55, and a baffle 59. The valve body 51 has a first air outlet 511, a second air outlet 512, a third air outlet 513, and a fourth air outlet 514. The second air outlet, the third air outlet, and the fourth air outlet are all rotatably connected to the valve plate through the valve stem. The actuator is disposed on one side of the valve body. One end of the valve stem of the second air outlet extends out of the valve body and connects to the actuator. The other end of all valve stems extends out of the valve body and connects to the connecting rod assembly. The upper and lower side walls inside the third air outlet and the fourth air outlet are equipped with baffles, which are located on opposite sides of the valve plate.

[0058] The actuator 52 outputs power to the valve stem 53 of the second air vent 512, directly driving the valve plate 55 of the second air vent 512 to rotate around its valve stem 53, thereby realizing the opening and closing action of the second air vent 512. At the same time, the valve stem 53 of the second air vent 512 transmits the rotational motion to the valve stems 53 of the third air vent 513 and the fourth air vent 514 through the connecting rod assembly 54, causing the valve plates 55 of the third air vent 513 and the fourth air vent 514 to rotate synchronously. By controlling the rotation angle of the valve stem 53 of the second air vent 512 (such as preset positions of 0°, 90°, and 180°, corresponding to the purging air intake position, the exhaust air intake position, and the exhaust position, respectively), the opening and closing state of the valve plates 55 of the second air vent 512, the third air vent 513, and the fourth air vent 514 can be adjusted synchronously, thereby realizing the three-position switching of the four ventilation ducts. Multi-station control can be achieved with only one actuator 52 and linkage assembly 54, eliminating the need for a separate drive unit for each air outlet, significantly reducing the overall size of the valve body 51 and making it suitable for installation in confined spaces. Replacing the collaborative control logic of multiple actuators 52 with a mechanical linkage structure avoids synchronization errors or delays caused by timing differences among multiple actuators 52, improving the accuracy and stability of airflow switching. Simultaneously, the single actuator 52 reduces electrical control nodes, lowering the probability of failure. Furthermore, reducing the number of actuators 52 lowers equipment procurement costs. With fewer structural components, later maintenance only requires inspection of a single actuator 52 and linkage assembly 54, simplifying the maintenance process and reducing maintenance costs. The baffle 59 limits the valve plates 55 of the third air outlet 513 and the fourth air outlet 514, preventing over-opening and over-closing.

[0059] The link assembly 54 comprises a first link piece 541, a first elastic piece 542, a second elastic piece 543, and a second link piece 544. The valve rod of the second air port has a first transmission block 56 and a second transmission block 57. One end of the first link piece is in transmission connection with the valve rod of the second air port through the first transmission block. The other end of the first link piece is in fixed connection with the valve rod of the third air port. One end of the first elastic piece is connected to the third air port. The other end of the first elastic piece is connected with the first link piece. The first elastic piece is located on one side of the third air port. One end of the second link piece is in transmission connection with the valve rod of the second air port through the second transmission block. The other end of the second link piece is in fixed connection with the valve rod of the fourth air port. One end of the second elastic piece is connected to the fourth air port. The other end of the second elastic piece is connected with the second link piece. The second elastic piece is located on one side of the fourth air port.

[0060] The first elastic piece 542 and the second elastic piece 543 are both springs. Through the pulling action of the first elastic piece 542 on the first link piece 541, it is ensured that the valve plate 55 of the third air port 513 can be rotated to be closed after the action force of the actuator 52 is removed. Through the pulling action of the second elastic piece 543 on the second link piece 544, it is ensured that the valve plate 55 of the fourth air port 514 can be rotated to be closed after the action force of the actuator 52 is removed. Through the first elastic piece 542 and the second elastic piece 543 as passive reset elements, no additional energy is needed for driving. The pre-tightening force of the first elastic piece 542 and the second elastic piece 543 is used to realize mechanical self-holding of the closed state of the valve plate 55, and the synchronization error of the traditional multiple actuators 52 is eliminated. The three-position switching is as follows:

[0061] When the actuator 52 is in the 0° position (purge air intake position), the valve plate 55 of the fourth air port 514 is opened, and the valve plates 55 of the third air port 513 and the second air port 512 are closed. At this time, the first elastic piece 542 is in a contracted state, and the second elastic piece 543 is in a stretched state.

[0062] When the actuator 52 is in the 90° position (waste gas intake position), the valve rod 53 of the second air port 512 directly drives the valve plate 55 of the second air port 512 to rotate 90°. At the same time, the second transmission block 57 removes the downward pulling force on the second link piece 544. The second elastic piece 543 pulls the second link piece 544 to move upward, and then the valve rod 53 of the fourth air port 514 is rotated 90°, driving the valve plate 55 of the fourth air port 514 to rotate 90°. In this state, the first transmission block 56 does not act on the first link piece 541. At this time, the valve plate 55 of the second air port 512 is opened, and the valve plates 55 of the third air port 513 and the fourth air port 514 are closed. The first elastic piece 542 and the second elastic piece 543 are both in a contracted state.

[0063] When the actuator 52 is in the 180° position (outlet working position), the valve rod 53 of the second air port 512 continues to drive the valve plate 55 of the second air port 512 to rotate 90°, and the first transmission block 56 pulls the first connecting rod member 541 downward, so that the valve rod 53 of the third air port 513 rotates 90°, driving the valve plate 55 of the third air port 513 to rotate 90°. In this state, the second transmission block 57 does not act on the second connecting rod member 544, at this time, the valve plate 55 of the third air port 513 is opened, the valve plates 55 of the second air port 512 and the fourth air port 514 are closed, and the first elastic member 542 is in a stretched state, and the second elastic member 543 is in a contracted state.

[0064] The first connecting rod member 541 includes a first connecting arm 5411, a second connecting arm 5412, a third connecting arm 5413, a first pin shaft 5414, and a second pin shaft 5415. One end of the first connecting arm 5411 has a first arc-shaped slot 5416, and the first transmission block 56 extends into the first arc-shaped slot 5416. The other end of the first connecting arm 5411 is hinged to one end of the second connecting arm 5412 through the first pin shaft 5414. The other end of the second connecting arm 5412 is hinged to one end of the third connecting arm 5413 through the second pin shaft 5415. The other end of the third connecting arm 5413 is fixedly connected to the valve rod 53 of the third air port 513. One end of the first elastic member 542 is connected to the second pin shaft 5415. In the initial state, the first elastic member 542 is in a contracted state, and the first transmission block 56 abuts against one end wall of the first arc-shaped slot 5416 close to the first elastic member 542. The second connecting rod member 544 includes a fourth connecting arm 5441, a fifth connecting arm 5442, a sixth connecting arm 5443, a third pin shaft 5444, and a fourth pin shaft 5445. One end of the fourth connecting arm 5441 has a second arc-shaped slot 5446, and the second transmission block 57 extends into the second arc-shaped slot 5446. The other end of the fourth connecting arm 5441 is hinged to one end of the fifth connecting arm 5442 through the third pin shaft 5444. The other end of the fifth connecting arm 5442 is hinged to one end of the sixth connecting arm 5443 through the fourth pin shaft 5445. The other end of the sixth connecting arm 5443 is fixedly connected to the valve rod 53 of the fourth air port 514. One end of the second elastic member 543 is connected to the fourth pin shaft 5445. In the initial state, the second elastic member 543 is in a stretched state, and the second transmission block 57 abuts against one end wall of the second arc-shaped slot 5446 away from the second elastic member 543. The radii of the first arc-shaped slot and the second arc-shaped slot are both 90°.

[0065] The movement path of the first transmission block 56 is defined by the design of the first arc-shaped groove 5416, realizing the segmented control of the idle stroke and the driving stroke, and ensuring that the actuator 52 accurately drives the valve plate 55 of the third air port 513 within a specific angle range. The movement path of the second transmission block 57 is defined by the design of the second arc-shaped groove 5446, realizing the segmented control of the idle stroke and the driving stroke, and ensuring that the actuator 52 accurately drives the valve plate 55 of the fourth air port 514 within a specific angle range. Through the cooperation of the first arc-shaped groove 5416, the first transmission block 56, the second arc-shaped groove 5446, and the second transmission block 57, the mis-triggering of the adjacent valve plate 55 is avoided, the stability of the switching process is improved, and the time sequence peak shifting control of the multi-valve plate 55 action is realized. Through the double three-arm hinged structure, the three-position switching of the single actuator 52 can be realized without complex structure.

[0066] The PLC controller 58 is also included, and the actuator 52 is electrically connected to the PLC controller 58. The PLC controller 58 automatically controls the actuator 52 to realize automatic switching of the workstations.

[0067] Embodiment two:

[0068] As shown in Figures 11 to 18 The RTO system provided in this embodiment includes a base plate 14, a first support 1, a waste gas inlet ring 2, a second support 3, a purge gas inlet ring 4, a four-way air valve 5, a regenerator 6, a combustion chamber 7, an outlet passage 8, and a filter assembly 15. The four-way air valve 5 is the four-way air valve of embodiment one.

[0069] The first support 1 and the filter assembly 15 are fixed to the top of the base plate 14. The waste gas inlet ring 2 is fixed to the top of the first support 1. The second support 3 is fixed to the top of the waste gas inlet ring 2. The regenerator 6 is fixed to the top of the second support 3. The combustion chamber 7 is in communication with the top of the regenerator 6. The outlet passage 8 is fixed to the bottom of the regenerator 6. The regenerator 6 has a plurality of partitions 9. Each partition 9 is in communication with one four-way air valve 5. The first air port 511 of each four-way air valve 5 is in communication with the partition 9. The second air port 512 of each four-way air valve 5 is in communication with the waste gas inlet ring 4. The third air port 513 of each four-way air valve 5 is in communication with the outlet passage 8. The fourth air port 514 of each four-way air valve 5 is in communication with the purge gas inlet ring 4. The inlet end of the purge gas inlet ring 4 is in communication with the outlet end of the filter assembly 15. The inner cavity of the regenerator 6 is divided into twelve partitions 9 by the partition 10. Each partition 9 is divided into two upper and lower packing zones 12 by the partition net 11. Each packing zone 12 is filled with honeycomb ceramic regenerator 13. The inner cavity of the regenerator 6 is circular or square, which can be selected according to actual use requirements.

[0070] The four-way air valve 5 of the five continuous partitions 9 is switched to the exhaust gas intake position to form an exhaust gas intake area, the four-way air valve 5 of the five continuous partitions 9 is switched to the exhaust gas outlet position to form an exhaust gas outlet area, and the two partitions 9 between the two areas remain in the initial state of the four-way air valve 5 to form a purge area.

[0071] After the exhaust gas to be treated enters the exhaust gas intake ring 2, it enters the regenerator 6 through the corresponding four-way air valve 5 of the exhaust gas intake area (such as the 1-5# partition), exchanges heat with the honeycomb ceramic regenerator 13 in the heat release state, and is preheated to a high temperature before entering the combustion chamber 7 for oxidation decomposition. The high-temperature purified gas after combustion enters the exhaust gas outlet area (such as the 7-11# partition), and the heat is absorbed by the honeycomb ceramic regenerator 13 in the heat storage state in this area, and the purified gas is cooled and then enters the exhaust gas outlet channel 8 through the corresponding four-way air valve 5. The purge area (such as the 6# and 12# partitions) is connected to the purge intake ring 4 through the four-way air valve 5, and the purge gas enters the purge intake ring 4 after being filtered by the filter assembly 15. The filtered purge gas enters the partition 9, and the untreated exhaust gas remaining in the pores of the honeycomb ceramic regenerator 13 is blown into the combustion chamber 7 for oxidation again, avoiding the mixing of residual exhaust gas into the purified gas. By synchronously switching the position of the four-way air valve 5 through timing control, the function of the partition 9 is cyclically switched (for example, in the subsequent cycle, 2-6# is the exhaust gas intake area, 8-12# is the exhaust gas outlet area, and 7# and 1# are the purge areas), realizing continuous and stable exhaust gas treatment and heat recovery.

[0072] The present application discards the complex rotary valve of the traditional rotary RTO, adopts a structure of fixed regenerators 6 and a single four-way air valve 5 to control a single partition 9, saves the precise rotary transmission mechanism and dynamic sealing assembly, fundamentally reduces the risk of mechanical failure, and significantly improves the stability of equipment operation. A single partition 9 can realize three-position switching through only one four-way air valve 5, reducing the number of pipeline components, the installation space requirement, the manufacturing cost and the maintenance cost, and the control system is more simple and the synchronization is easier to guarantee. Moreover, the honeycomb ceramic regenerator 13 is filled in two layers, increasing the heat exchange area, and the heat recovery rate can reach more than 90%; the static structure reduces the heat loss caused by poor rotary sealing, further reduces the auxiliary heating energy consumption, and is especially suitable for high-concentration VOCs exhaust gas treatment scenarios. The partitions 9 and the four-way air valve 5 are independently arranged, and can be individually repaired without stopping the machine for overall maintenance. The filter assembly 15 filters the purge gas, which can reduce the blockage of the honeycomb ceramic regenerator 13, improve the heat exchange efficiency, reduce the maintenance cost, stabilize the purification efficiency, and ensure the efficient and stable operation of the equipment.

[0073] The gas outlet channel 8 comprises a gas outlet cylinder 81 and a gas outlet pipe 82. The top of the gas outlet cylinder 81 is fixed to the center of the bottom of the heat storage chamber 6. The bottom of the gas outlet cylinder 81 is fixedly connected with the gas outlet pipe 82. The bottom end of the gas outlet pipe 82 penetrates through the exhaust gas inlet ring 2 and extends below the exhaust gas inlet ring 2. The gas discharged from the gas outlet area first enters the gas outlet cylinder 81 and then is discharged through the gas outlet pipe 82.

[0074] The filter assembly 15 comprises sliding blocks 151, rotating discs 152, first bearings 153, first pipes 154, second pipes 155, second bearings 156, first valves 157, filter boxes 158, third pipes 1510, second valves 1511, stands 1512, gear rings 1513, connecting rods 1514 and a driving member 159. The stands 1512 are fixed to the top of the bottom plate 14. The exhaust gas inlet ring 2 and the right side wall of the heat storage chamber 6 are fixed with the sliding blocks 151. The rotating discs 152 have annular sliding grooves 1515 which are in sliding fit with the sliding blocks 151. The interiors of the left and right rotating discs 152 are provided with cavities 1516. The left and right rotating discs 152 are connected through the connecting rods 1514. The middle portions of the outer side walls of the left and right rotating discs 152 are fixed with the first bearings 153. Each first bearing 153 is rotatably connected with the first pipe 154. Each first pipe 154 is in communication with the cavity 1516 of the rotating disc 152. The left first pipe 154 is fixedly connected with the gas inlet end of the purge gas inlet ring 4. The right first pipe 154 is fixed to the stand 1512 and is in communication with the purge gas source. There are two filter boxes 158. The left and right side walls of the upper portion of each filter box 158 are fixed with the second bearings 156. Each second bearing 156 is rotatably connected with the second pipe 155. The left end of the left second pipe 155 is fixedly connected with the cavity 1516 of the left rotating disc 152. The left second pipe 155 is provided with the first valve 157. The right end of the right second pipe 155 is fixed to the left side wall of the right rotating disc 152. The right cavity 1516 is fixedly connected with two third pipes 1510. Each third pipe 1510 is provided with the second valve 1511. The two third pipes 1510 are fixedly connected with the lower portions of the two filter boxes 158. The two filter boxes 158 are arranged in an up-down manner. The outer wall of the right rotating disc 152 is fixedly sleeved with the gear ring 1513. The driving member 159 drives the gear ring 1513 to rotate.

[0075] The sliding cooperation of the slider 151 and the annular sliding groove 1515 of the rotating disc 152, and the connection of the connecting rod 1514 to the left and right rotating discs 152, realize the stable and synchronous rotation of the rotating disc 152; the first pipe 154 cooperates with the first bearing 153 to ensure stable aeration when the rotating disc 152 rotates. The purge gas enters the cavity 1516 of the right rotating disc 152 through the right first pipe 154, and when the first valve 157 and the second valve 1511 of the upper filter box 158 are opened (the corresponding valve below is closed), the purge gas enters the filter box 158 through the upper third pipe 1510 for filtration, and after filtration, it enters the cavity 1516 of the left rotating disc 152 through the upper left second pipe 155 (rotatably connected to the filter box 158 through the second bearing 156), and finally enters the purge inlet ring 4 through the left first pipe 154. When the filter plate 1582 of the upper filter box 158 needs to be replaced, the lower valve is opened, the driving member 159 is manually rotated, the driving ring gear 1513 drives the rotating disc 152 to rotate, and the upper and lower filter boxes 158 are exchanged in position (the filter box 158 always keeps the bottom of the box downward due to the rotation cooperation of the second bearing 156 and the second pipe 155 and the action of gravity); after the exchange, the first valve 157 and the second valve 1511 of the original upper filter box 158 (now located below) are closed, and the filter plate 1582 is disassembled, and at this time the purge gas continues to be supplied through the original lower filter box 158 (now located above), realizing non-stop operation.

[0076] Through the design of the double filter boxes 158 distributed above and below and the rotation switching of the rotating disc 152, combined with the opening and closing control of the first valve 157 and the second valve 1511, the filter plate 1582 can be replaced while the purge gas is continuously supplied, avoiding the influence of equipment downtime on production continuity. After the position of the filter box 158 is exchanged, the original upper filter box 158 is moved to the lower position, and the filter plate 1582 can be disassembled without the need to erect climbing tools, simplifying the operation process, reducing costs, and improving operation safety. The cooperation of the second pipe 155 and the second bearing 156 ensures that the filter box 158 always keeps the bottom of the box downward when the rotating disc 152 rotates, avoiding the backflow of impurities in the filter box 158, and ensuring the stability of the filtering function. Through the mechanical structure, the rotating disc 152 realizes stable rotation and aeration sealing, without the need for electric control, and the switching can be completed manually, reducing the risk of failure and the complexity of maintenance. Through the alternating work of the double filter boxes 158, combined with the deep purification of the purge gas by the filter assembly 15, impurities are continuously intercepted, ensuring the long-term smoothness of the regenerator and maintaining the efficient operation of the equipment.

[0077] The driving member 159 comprises a third bearing seat 1591, a fourth bearing seat 1592, a rotating shaft 1593, a gear 1594, a worm wheel 1595, a worm 1596 and a hand wheel 1597. The third bearing seat 1591 and the fourth bearing seat 1592 are fixed to the lower part of the stand 1512. The left end of the rotating shaft 1593 penetrates through the third bearing seat 1591 and is fixed with the gear 1594. The gear 1594 is engaged with the gear ring 1513. The right end of the rotating shaft 1593 is fixed with the worm wheel 1595. The bottom end of the worm 1596 is inserted into the fourth bearing seat 1592. The worm 1596 is engaged with the worm wheel 1595. The top end of the worm 1596 is fixed with the hand wheel 1597. The hand wheel 1597 is rotated to drive the worm 1596 to rotate, so that the worm wheel 1595 is rotated, the rotating shaft 1593 is rotated, the gear 1594 is rotated, the gear ring 1513 is rotated, and the rotating disc 152 is rotated. The worm wheel 1595 and the worm 1596 are matched to realize self-locking, so that the position of the filter box 158 after switching can be stably locked, accidental rotation is prevented, operation safety is improved, and equipment reliability is enhanced.

[0078] The filter box 158 comprises a box body 1581, a filter plate 1582, a sealing door 1583 and an insertion strip 1584. The left and right side walls inside the box body 1581 are both provided with insertion grooves 1585. The left and right side walls of the filter plate 1582 are both provided with the insertion strip 1584. The insertion strip 1584 is inserted into the insertion groove 1585. The second bearing 156 is located above the filter plate 1582. The filter plate 1582 is located above the position where the third pipe 1510 and the box body 1581 are communicated. The front side of the box body 1581 is provided with the sealing door 1583. When the filter plate 1582 needs to be taken out, the sealing door 1583 is only needed to be opened, and then the filter plate 1582 is pulled out forward. When the filter plate 1582 needs to be installed, the insertion strip 1584 is only needed to be matched with the insertion groove 1585, and then the insertion strip 1584 is inserted into the box body 1581 backward. The filter plate 1582 can be conveniently and quickly disassembled and assembled.

[0079] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features, and the modification or replacement does not change the essence of the corresponding technical solutions, and does not deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A four-way damper valve, characterized in that: comprising a valve body, an actuator, valve stems, a linkage assembly, valve plates, and baffles; the valve body has a first air port, a second air port, a third air port, and a fourth air port; the second air port, the third air port, and the fourth air port are each connected with a valve plate through a valve stem; the actuator is arranged on one side of the valve body; one end of the valve stem of the second air port extends out of the valve body and is connected with the actuator; the other end of each of the valve stems extends out of the valve body and is connected with the linkage assembly; the upper and lower side walls inside the third air port and the fourth air port are each provided with a baffle, and the baffles on the upper and lower sides are respectively located on the opposite sides of the valve plate; the linkage assembly comprises a first linkage member, a first elastic member, a second elastic member, and a second linkage member; the valve stem of the second air port has a first transmission block and a second transmission block; one end of the first linkage member is in transmission connection with the valve stem of the second air port through the first transmission block, and the other end of the first linkage member is fixedly connected with the valve stem of the third air port; one end of the first elastic member is connected to the third air port, the other end of the first elastic member is connected with the first linkage member, and the first elastic member is located on one side of the third air port; one end of the second linkage member is in transmission connection with the valve stem of the second air port through the second transmission block, and the other end of the second linkage member is fixedly connected with the valve stem of the fourth air port; one end of the second elastic member is connected to the fourth air port, the other end of the second elastic member is connected with the second linkage member, and the second elastic member is located on one side of the fourth air port; the first linkage member comprises a first connecting arm, a second connecting arm, a third connecting arm, a first pin shaft, and a second pin shaft; one end of the first connecting arm has a first arc-shaped groove, and the first transmission block extends into the first arc-shaped groove; the other end of the first connecting arm is hingedly connected with one end of the second connecting arm through the first pin shaft; the other end of the second connecting arm is hingedly connected with one end of the third connecting arm through the second pin shaft; the other end of the third connecting arm is fixedly connected with the valve stem of the third air port; one end of the first elastic member is connected with the second pin shaft; in an initial state, the first elastic member is in a contracted state, and the first transmission block abuts against one end wall of the first arc-shaped groove close to the first elastic member; the second linkage member comprises a fourth connecting arm, a fifth connecting arm, a sixth connecting arm, a third pin shaft, and a fourth pin shaft; one end of the fourth connecting arm has a second arc-shaped groove, and the second transmission block extends into the second arc-shaped groove; the other end of the fourth connecting arm is hingedly connected with one end of the fifth connecting arm through the third pin shaft; the other end of the fifth connecting arm is hingedly connected with one end of the sixth connecting arm through the fourth pin shaft; the other end of the sixth connecting arm is fixedly connected with the valve stem of the fourth air port; one end of the second elastic member is connected with the fourth pin shaft; in an initial state, the second elastic member is in a stretched state, and the second transmission block abuts against one end wall of the second arc-shaped groove away from the second elastic member. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The four-way damper according to claim 1, wherein: the first and second arc-shaped grooves each have an arc of 90°.

3. The four-way damper according to claim 1, wherein: a PLC controller is further included; the actuator is electrically connected to the PLC controller.

4. An RTO system, comprising: a base plate, a first support, a waste gas inlet ring, a second support, a purge gas inlet ring, a four-way damper, a regenerator, a combustion chamber, an outlet channel, and a filter assembly; the four-way damper is any one of claims 1-3; the top of the base plate is fixed with the first support and the filter assembly; the top of the first support is fixed with the waste gas inlet ring; the top of the waste gas inlet ring is fixed with the second support; the top of the second support is fixed with the regenerator, the top of the regenerator is provided with the combustion chamber in communication therewith, and the bottom of the regenerator is fixed with the outlet channel; the regenerator has a plurality of sub-zones; each sub-zone is in communication with one four-way damper; the first port of each four-way damper is in communication with the sub-zone, the second port of each four-way damper is in communication with the waste gas inlet ring, the third port of each four-way damper is in communication with the outlet channel, and the fourth port of each four-way damper is in communication with the purge gas inlet ring; the inlet end of the purge gas inlet ring is in communication with the outlet end of the filter assembly.

5. The RTO system according to claim 4, wherein: the inner cavity of the regenerator is equally divided into twelve sub-zones by a partition plate; each sub-zone is divided into an upper packing zone and a lower packing zone by a partition net, and each packing zone is filled with honeycomb ceramic regenerators; the inner cavity of the regenerator has a circular or square ring shape.

6. The RTO system according to claim 4, wherein: the outlet channel comprises an outlet cylinder and an outlet pipe; the top of the outlet cylinder is fixed at the center of the bottom of the regenerator; the bottom of the outlet cylinder is fixedly connected with the outlet pipe, the bottom end of the outlet pipe penetrates through the waste gas inlet ring and extends below the waste gas inlet ring.

7. The RTO system according to claim 4, wherein: the filter assembly comprises a sliding block, a rotating disc, a first bearing, a first pipe, a second pipe, a second bearing, a first valve, a filter box, a third pipe, a second valve, a stand, a gear ring, a connecting rod, and a driving member; the stand is fixed to the top of the base plate; the right side wall of the waste gas inlet ring and the regenerator, and the left side wall of the stand are each fixed with a sliding block; the rotating disc has an annular sliding groove which is in sliding cooperation with the sliding block; the inner cavities of the left and right rotating discs are each provided with a cavity, and the left and right rotating discs are connected by a connecting rod; the middle part of the outer side wall of each rotating disc is fixed with a first bearing, each first bearing is rotatably connected with a first pipe, each first pipe is in communication with the cavity of the rotating disc, the left first pipe is fixedly connected with the inlet end of the purge gas inlet ring, and the right first pipe is fixed to the stand and in communication with a purge gas source; the second pipe is rotatably connected with a second bearing, the second bearing is fixed to the top of the stand, the third pipe is rotatably connected with a second valve, the second valve is fixed to the top of the stand, the filter box is fixed to the top of the stand, the filter box is in communication with the first valve, the first valve is fixed to the top of the stand, and the driving member is fixed to the top of the stand. The two filter boxes are arranged in an up-down manner. The outer wall of the right rotating disc is fixedly sleeved with a gear ring.

8. The RTO system of claim 7, wherein: The driving member comprises a third bearing seat, a fourth bearing seat, a rotating shaft, a gear, a worm wheel, a worm, and a hand wheel. The lower part of the stand is fixedly provided with the third bearing seat and the fourth bearing seat. The left end of the rotating shaft penetrates through the third bearing seat and is fixedly provided with the gear which is engaged with the gear ring. The bottom end of the worm is inserted into the fourth bearing seat, the worm is engaged with the worm wheel, and the top end of the worm is fixedly provided with the hand wheel.

9. The RTO system of claim 8, wherein: The filter box comprises a box body, a filter plate, a sealing door, and a plug; The left and right side walls inside the box body are provided with plug slots; The left and right side walls of the filter plate are provided with plugs which are inserted into the plug slots; The second bearing is located above the filter plate which is located above the position where the third pipe and the box body are communicated; The front side of the box body is provided with a sealing door. ​

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