Sealing device based on a grate drive beam

Abstract

The present application belongs to the technical field of garbage incineration, and relates to a sealing device based on a grate driving beam, which is installed on an ash bucket wall and used for movable sealing of the driving beam. The sealing device comprises a base box, a supporting block, a sealing assembly and a sealing sleeve. The base box is detachably fixedly connected to the ash bucket wall and arranged on the inner side of the ash bucket, and a hole for the driving beam to pass through is arranged on the base box. The supporting block is fixedly connected to the base box and arranged on the side of the base box away from the ash bucket, and a clamping groove for placing the sealing assembly is arranged on the supporting block. The sealing assembly is sleeved on the driving beam and placed in the clamping groove. The two ends of the sealing sleeve are connected to the sealing assembly and the base box respectively, so as to realize movable sealing of the driving beam. On the basis of canceling the sealing fan, the present application realizes effective sealing of the driving beam and the ash bucket during forward and backward reciprocating operation and long-time stable operation, and ensures sealing effect and operation quality.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waste incineration and relates to a sealing device based on a grate driving beam. BACKGROUND

[0002] In recent years, under the encouragement of the national industrial policy of waste reduction, harmlessness and resource utilization, the waste incineration industry in China has entered a period of rapid development. Various large and medium-sized cities have successively built waste incineration plants, and the level of waste harmless treatment and resource utilization is becoming higher and higher. The incinerator is the core equipment of the waste incineration process, which realizes the whole process of waste feeding, incineration and slagging, and the stable and reliable equipment is the effective guarantee for the overall operation. The grate is a device for realizing waste drying, combustion and burnout, and the waste is transported and combusted on the reciprocating core component grate plate. The reciprocating motion of the grate plate is driven by the driving beam in the high-temperature ash bucket below, and the driving beam penetrates the ash bucket and is connected with the external hydraulic device. The stable and reliable driving beam is an important guarantee for the continuous operation of the grate, and the effective sealing of the driving beam penetrating the high-temperature ash bucket is a key point for reliable operation.

[0003] Since the high-temperature ash bucket below the grate is a device for providing combustion air to the furnace and a collection device for grate ash leakage, the driving beam penetrates the wall of the ash bucket and moves continuously. During the operation process, the driving beam may also sway, which has a higher sealing requirement for the penetration position of the ash bucket. Leakage may occur, which will cause the high-temperature air in the ash bucket and the grate ash leakage to leak to the outside, seriously affecting the surrounding environment and the operation quality. The existing application design generally installs a metal sealing cover with a built-in sealing ring at the position where the driving beam penetrates the wall, and also connects a long-term running sealing air into the sealing cover to prevent the overflow of the primary air in the ash bucket. Since the sealing air demand is large, a separate sealing air fan needs to be set. This scheme is theoretically feasible, but as the running time progresses, the technical sealing ring will wear out, resulting in a decrease in its sealing effect. At the same time, since the sealing air needs to be set with a long-term running sealing air fan, it will require certain equipment cost and operation cost, and also increase the work and cost of maintenance and repair.

[0004] In summary, the research on new sealing solutions and the cancellation of the sealing fan setting is the focus of industry attention and innovation, which is conducive to improving the operation quality of waste incineration, reducing the operation cost and promoting the healthy development of the industry. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a sealing device based on a grate driving beam, which realizes the effective sealing of the driving beam with the ash bucket during the forward and backward reciprocating operation and the long-term stable operation on the basis of canceling the sealing fan, and ensures the sealing effect and operation quality.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] A sealing device based on a driving beam of a grate is installed on a wall of an ash bucket and is used for movable sealing of the driving beam, comprising a base box, a supporting block, a sealing assembly and a sealing sleeve, the base box is detachably fixedly connected to the wall of the ash bucket and is arranged on the inner side of the ash bucket, and a hole for the driving beam to pass through is arranged on the base box;

[0008] The supporting block is fixedly connected to the base box and is arranged on the side of the base box away from the ash bucket, a clamping groove for placing the sealing assembly is arranged on the supporting block, the sealing assembly is sleeved on the driving beam and is placed in the clamping groove, and the two ends of the sealing sleeve are connected to the sealing assembly and the base box respectively to realize movable sealing of the driving beam;

[0009] The base box is a hollow box structure with a cover plate on the right end face, a hole for the driving beam to pass through is arranged in the middle of the cover plate, the left end face of the base box is an open structure, and the base box is fixedly connected to the opening of the wall of the ash bucket, so that the driving beam passes through the wall of the ash bucket and the base box;

[0010] The sealing assembly comprises a supporting ring, a first sealing ring, a distance ring, a second sealing ring and a pressing plate, the first sealing ring, the distance ring and the second sealing ring are sequentially placed in the supporting ring from inside to outside, and the pressing plate is connected to the supporting ring through bolts and is arranged on the outside of the second sealing ring to mount the first sealing ring, the distance ring and the second sealing ring in the supporting ring.

[0011] Further, the clamping groove is arranged along the axial direction of the driving beam, and the axial width of the sealing assembly is smaller than the axial width of the clamping groove, so that the axial displacement of the sealing assembly is limited and the sealing assembly has a certain movement space in the clamping groove.

[0012] Further, the cover plate is perpendicular to the driving beam.

[0013] Further, the materials of the first sealing ring and the second sealing ring are polytetrafluoroethylene and polypropylene ammonium respectively.

[0014] Further, the sealing sleeve is a high-temperature-resistant flexible four-fluorine cloth.

[0015] Further, the inner hole sizes of the supporting ring, the distance ring and the pressing plate are larger than the outer diameter of the driving beam, and the inner hole sizes of the first sealing ring and the second sealing ring are matched with the outer diameter of the driving beam to form a transition fit.

[0016] Further, an annular cavity surrounding the driving beam is formed between the first sealing ring and the second sealing ring through cooperation of the first sealing ring, the second sealing ring and the distance ring.

[0017] The support ring is provided with an air inlet through hole, and an annular groove communicating with the air inlet through hole is arranged on the outer circle of one side of the distance ring; and a plurality of radial through grooves communicating with the annular groove and the inner cavity of the distance ring and facing the shaft center are arranged on the same side of the distance ring and the annular groove, so that the air inlet through hole communicates with the annular cavity on the inner side of the distance ring.

[0018] Further, the end of the air inlet through hole away from the annular groove is connected with the secondary air.

[0019] Further, the end of the air inlet through hole away from the annular groove is connected with the oil nozzle to inject high-temperature lubricating oil into it.

[0020] Further, the base box, the support ring, the first sealing ring, the distance ring, the second sealing ring and the pressing plate are in the form of left-right symmetry with the middle broken, so as to facilitate on-site installation, and further to realize online replacement and maintenance without dismounting the driving beam, so as to meet the operation and maintenance requirements.

[0021] The beneficial effects of the present application are as follows:

[0022] The sealing device based on the driving beam of the grate provided by the present application provides an innovative solution for the sealing problem of the driving beam penetrating through the high-temperature ash hopper in the waste incinerator. The device not only ensures the effective sealing of the driving beam with the ash hopper during reciprocating operation, but also realizes long-term stable operation, greatly improving the operation quality and environmental benefits of waste incineration.

[0023] Firstly, the sealing device is formed by organically combining the base box, the support block, the sealing assembly and the sealing sleeve through ingenious design, forming a complete and efficient sealing system. The base box is detachably fixed on the ash hopper wall and is provided with a hole for the driving beam to pass through, which is convenient for installation and maintenance. The sealing assembly is sleeved on the driving beam and connected with the base box through the flexible sealing sleeve, and the sealing assembly is placed through the bottom bearing type support block to form axial limiting. This design enables the sealing assembly to flexibly adjust with the fluctuation of the driving beam, avoiding additional stress and wear, thereby ensuring the stability and durability of the sealing.

[0024] Secondly, the innovation of the device also lies in the material selection and structural design of the sealing assembly; the sealing ring made of double-layer non-metallic material not only meets the requirements of high-temperature resistance, corrosion resistance and wear resistance, but also closely contacts with the driving beam, forming a good sealing effect. At the same time, the inner hole size of the sealing ring matches the outer diameter of the driving beam, forming a transition fit, further improving the reliability and service life of the sealing; in addition, the base box adopts a symmetrical broken design, making online maintenance and replacement more convenient and fast, greatly reducing the maintenance cost and time.

[0025] Finally, the sealing device also cancels the configuration of the traditional sealing air and the corresponding fan design, and adopts a clever air inlet channel design and an annular cavity, thereby being able to form a small volume air curtain by borrowing a small amount of existing secondary air, and realizing the sealing of the driving beam and the ash bucket in combination with the double-layer sealing ring structure. This innovative measure not only simplifies the system structure, reduces the equipment cost, but also reduces the operation and maintenance and energy consumption of the sealing fan, thereby saving the operation cost. This breakthrough design makes the sealing device of the application have a significant leading advantage in the waste incineration industry, and provides strong technical support for the healthy development of the industry.

[0026] In summary, the sealing device based on the driving beam of the grate in the application has innovative design, efficient sealing effect, stable operation performance and significant cost saving advantage, which shows its leading position and practical value in the waste incineration industry.

[0027] Other advantages, objects and features of the application will be set forth in part in the following specification, and in part will become apparent to those skilled in the art from the examination of the following specification, or can be learned from practice of the application. The objects and other advantages of the application can be realized and attained by the below description. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to make the objects, technical solutions and advantages of the application more clear, the preferred detailed description of the application will be combined with the drawings, in which:

[0029] Figure 1 is a structural schematic view of a sealing device based on the driving beam of the grate in Example 1;

[0030] Figure 2 is a structural schematic view of a sealing assembly in Example 1;

[0031] Figure 3 is Figure 2 A-A sectional view of;

[0032] Figure 4 is a plane schematic view of a base in Example 1;

[0033] Figure 5 is a structural schematic view of a support block in Example 1;

[0034] Figure 6 is a structural schematic view of a sealing device based on the driving beam of the grate in Example 2;

[0035] Figure 7 is a structural schematic view of a support ring in Example 2;

[0036] Figure 8Structure schematic diagram of the spacer ring in Example 2.

[0037] Figures: ash chute wall 1, base 2, cover plate 21, support block 3, clamping groove 31, sealing assembly 4, support ring 41, air inlet through hole 411, pressing plate 42, first sealing ring 43, spacer ring 44, annular groove 441, radial through groove 442, second sealing ring 45, sealing sleeve 5, drive beam 6. DETAILED DESCRIPTION

[0038] The advantages and effects of the present application can be easily understood by those skilled in the art from the description. The present application can also be implemented or applied in different specific embodiments, and various modifications or changes can be made to the details based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the features in the following examples and embodiments can be combined with each other without conflict.

[0039] The drawings are only used for illustrative description, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation of the present application; in order to better illustrate the embodiments of the present application, some components in the drawings are omitted, enlarged or reduced, and do not represent the actual product size; it is understandable for those skilled in the art that some known structures and their descriptions in the drawings can be omitted.

[0040] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for illustrative description, and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0041] Please refer to Figures 1-5 It is a sealing device based on the drive beam of the grate, which is installed on the ash chute wall 1 and used for the movable sealing of the drive beam 6, comprising a base box 2, a support block 3, a sealing assembly 4 and a sealing sleeve 5, the base box 2 is detachably fixedly connected to the ash chute wall 1 and arranged on the inner side of the ash chute, and a hole for the drive beam 6 to pass through is arranged on the base box 2;

[0042] The sealing assembly 4 is sleeved on the driving beam 6 and arranged on the side of the base box 2 away from the ash chute (close to the outer side of the ash chute). The two ends of the sealing sleeve 5 are connected with the sealing assembly 4 and the base box 2 respectively, so as to realize the movable sealing of the driving beam 6 by matching the sealing sleeve 5 and the base box 2 through the sealing assembly 4.

[0043] The support block 3 is fixedly connected to the base box 2 and arranged on the side of the base box 2 away from the ash chute. A clamping groove 31 for placing the sealing assembly 4 is arranged on the support block 3. The clamping groove 31 is arranged along the reciprocating direction (i.e. the axial direction) of the driving beam 6. The axial width of the sealing assembly 4 is 10-15 mm smaller than the axial width of the clamping groove 31. Therefore, the axial displacement of the sealing assembly 4 is limited, and the sealing assembly 4 has a certain moving space in the clamping groove 31. The depth of the clamping groove 31 is adaptively set according to the size of the sealing assembly 4, so that the sealing assembly 4 is preferably not dropped out of the clamping groove 31.

[0044] Specifically, the base box 2 adopts a box structure with a hollow and a cover plate 21 at the upper end. A circular hole for the driving beam 6 to pass through is arranged in the middle of the cover plate. The lower end of the box is an open structure. A circle of reserved installation outer edge is arranged around the open structure. The open structure is overlapped on the ash chute wall below the grate ash chute and fixed on the ash chute wall 1 through bolt connection. The cover plate 21 is perpendicular to the driving beam 6 and forms a certain angle with the lower end surface (adaptively set according to the angle of the ash chute wall).

[0045] Further, the base box 2 adopts a left-right symmetrical form with a broken middle, so as to be conveniently installed on the driving beam 6. After installation, the butt joint is welded and closed.

[0046] In another embodiment, the hole in the middle of the cover plate can be set as a corresponding hole type (such as a square hole) according to the shape of the driving beam 6.

[0047] The sealing assembly 4 includes a support ring 41, a first sealing ring 43, a distance ring 44, a second sealing ring 45, and a pressing plate 42. The first sealing ring 43, the distance ring 44, and the second sealing ring 45 are sequentially placed in the support ring 41 from bottom to top and tightly pressed by the pressing plate 42. The pressing plate 42 is connected with the support ring 41 through a bolt, so as to install the first sealing ring 43, the distance ring 44, and the second sealing ring 45 in the support ring 41.

[0048] Specifically, the sealing assembly 4 is integrally installed in the base box 2 and supported (placed) in the clamping groove 31 of the support block 3 on the inner side of the base box. The support block 3 is welded on the side of the cover plate 21 of the base box 2 away from the ash chute. The sealing assembly can move within a certain range in the clamping groove 31. The driving beam passes through the center of the sealing assembly 4.

[0049] The sealing assembly comprises a plurality of circular hollow, middle broken and left-right symmetrical overlapping mounting parts, from inside to outside (inside of the hopper to outside of the hopper), in sequence, a supporting ring 41, a first sealing ring 43, a distance ring 44, a second sealing ring 45 and a pressing plate 42, the pressing plate is fastened with the supporting ring through bolt connection, the first sealing ring 43, the distance ring 44 and the second sealing ring 45 are sequentially fixed in the inner cavity of the supporting ring, the circular boss at one end of the supporting ring 41 close to the base box 2 is connected with the circular boss on the inner side of the upper end cover of the base box through the sealing sleeve 5 made of high-temperature-resistant flexible Teflon cloth, realizing the connection and sealing of the sealing assembly 4 and the base box 2.

[0050] The sealing sleeve 5 can be sleeved on the end of the driving beam in whole or can be broken and then fixed on the outside of the driving beam and then high-temperature bonded and formed, except the sealing sleeve 5 and the sealing ring, other parts are made of metal material.

[0051] Further, the circular boss at one end of the supporting ring 41 close to the base box 2 and the circular boss on the inner side of the upper end cover of the base box are both provided with annular clamping grooves, so as to fix the sealing sleeve 5 through the clamping ring or the clamping hoop.

[0052] Further, the inner hole size of the supporting ring 41 and the pressing plate 42 is larger than the outer diameter of the driving beam 6, and the driving beam 6 is not in contact with the supporting ring 41 and the pressing plate 42, the two circular sealing rings are spaced and mounted in the groove of the supporting ring 41 through the distance ring 44, the first sealing ring 43 and the second sealing ring 45 are made of polytetrafluoroethylene and polypropylene acid ammonium material with a certain hardness, or are made of polytetrafluoroethylene material, or are made of polypropylene acid ammonium material; the inner hole size of the first sealing ring 43 and the second sealing ring 45 is consistent with or slightly larger than the outer diameter of the driving beam 6, forming a transition fit, and satisfying that no friction occurs between them, that is, the two sealing rings maintain overall contact with the outside of the driving beam, realizing double effective sealing.

[0053] The sealing assembly 4 and the base box are flexibly connected through the sealing sleeve 5, and are limited by the movable supporting block 3, so that the sealing assembly 4 can have small range fluctuation with the driving beam 6 in operation without damage such as abrasion, the sealing ring has certain softness, good sealing performance, and good high-temperature resistance, corrosion resistance and wear resistance, and long service life.

[0054] The driving beam 6 passes through the cover plate 21 of the base box 2 to the hopper, and realizes the isolation and sealing of the inside and outside of the hopper in the forward and backward reciprocating operation of the driving beam through the sealing assembly 2, after a certain period of operation, the sealing assembly 4 can be replaced online without disassembling the base box 2, and the maintenance is more convenient.

[0055] Specifically, the base box 2, the support ring 41, the first sealing ring 43, the distance ring 44, the second sealing ring 45 and the pressing plate 42 are all in the form of left-right symmetry with the middle broken, so as to facilitate on-site installation and online maintenance without removing the driving beam, thereby meeting the operation and maintenance requirements.

[0056] Embodiment 2

[0057] Please refer to Figures 6-8 The difference between the present embodiment and Embodiment 1 is that, in the present embodiment, the first sealing ring 43 and the second sealing ring 45 cooperate with the distance ring 44 to form an annular cavity around the driving beam 6 between the first sealing ring 43 and the second sealing ring 45, the support ring 41 is provided with an air inlet through hole 411, the outer circle of one side of the distance ring 44 is provided with an annular groove 441 communicating with the air inlet through hole 411, and the same side of the distance ring 44 and the annular groove 441 is provided with a plurality of radial through grooves 442 facing the shaft and communicating with the annular groove 441 and the inner cavity of the distance ring, so that the air inlet through hole 411 communicates with the annular cavity on the inner side of the distance ring.

[0058] Specifically, the secondary air branch pipe connected to the secondary air of the incinerator is connected to one end of the air inlet through hole 411 away from the annular groove 441, so as to use the secondary air with a certain pressure as sealing air, and then enter the annular groove 441 on the outer side of the distance ring through the air inlet through hole 411 of the support ring 41, and then enter the annular cavity on the inner side of the distance ring close to the driving beam through the plurality of radial through grooves 442 of the distance ring, and then form a sealing air curtain around the driving beam to prevent the primary air in the ash bucket from leaking to the outside of the ash bucket through the small gap between the first sealing ring 43 and the driving beam 6, thereby further ensuring the sealing between the driving beam and the ash bucket.

[0059] Since the gap between the first sealing ring 43 and the second sealing ring 45 and the driving beam is very small, and the volume of the annular cavity between the distance ring 44 and the driving beam is also relatively small, the air volume required to form a sealing air curtain in the annular cavity is also relatively small, so it is not necessary to set a separate sealing air fan, and a small amount of air volume can meet the requirements from the existing incinerator secondary air surplus, and since the amount of secondary air is small, it is not necessary to improve the design of the existing secondary air.

[0060] Specifically, taking a 600 tons / day incinerator as an example, the parameters of the secondary air are as follows in Table 1:

[0061] Table 1

[0062] Fan Fan Design air volume Design pressure Unit Nm 3 / h]]> Pa Primary fan Primary air 70000 4200 Secondary fan Secondary air 37000 5200 Seal fan Seal air 6000 7000

[0063] Wherein the primary air is into the ash bucket under the grate, and then through the air hole of the grate piece on the upper part of the ash bucket to blow into the furnace to achieve combustion support; the sealing device is to prevent the primary air with temperature and pressure in the ash bucket from leaking out due to the reciprocating movement of the driving beam through the ash bucket wall.

[0064] Wherein the secondary air is blown into the furnace through the tuyere around the upper outlet of the furnace, to achieve disturbance to the flue gas and promote complete combustion of the flue gas.

[0065] Because the existing sealing device requires a large amount of air and air pressure, and the parameters do not match, a separate sealing fan is needed to supply air.

[0066] In the present embodiment, the annular cavity around the driving beam that forms the sealing air curtain has a very small volume, and only a small amount of air is needed to meet the demand. Taking a 600-ton / day incinerator as an example, the air inlet hole 411 of the support ring 41 can be selected to have a diameter of 2 mm, the annular groove 441 of the outer circle of the distance ring can be selected to have a square cross-section with a side length of 2 mm, and the four radial grooves 442 with a cross-section of 4 mm*2 mm towards the axis are evenly distributed in the circumferential direction. The height of the annular cavity between the first sealing ring 43 and the second sealing ring 45 on the inside of the distance ring can be selected to be 3 mm. The thickness of the first sealing ring 43 and the second sealing ring 45 can be selected to be 5 mm, and the thickness of the distance ring 44 can be selected to be 7 mm. It only needs 300 Nm 3 / h, 5000 Pa air to meet the sealing requirement, and a small amount of excess air can be directly separated from the secondary air, so a separate fan is not needed, and the normal use of the secondary air will not be affected.

[0067] Embodiment 3

[0068] The difference between this embodiment and embodiment 2 is that in this embodiment, the air inlet hole of the support ring 41 is not ventilated, but an oil nozzle is connected to the end of the air inlet hole 411 away from the annular groove, and high-temperature lubricating oil is periodically added to the air inlet hole through the oil nozzle, so that the annular cavity between the distance ring 44 and the driving beam is filled with high-temperature lubricating oil, and the inside and outside of the ash bucket are isolated by the semi-solid high-temperature lubricating oil to achieve sealing of the movement gap of the driving beam.

[0069] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A seal arrangement based on a stoker drive beam, mounted on a hopper wall for the mobile seal of the drive beam, characterized in that: The base box is detachably fixedly connected to the wall of the ash bucket and arranged inside the ash bucket, and a hole for the driving beam to pass through is arranged on the base box; The support block is fixedly connected to the base box and arranged on the side of the base box away from the ash bucket, a clamping groove for placing the sealing assembly is arranged on the support block, the sealing assembly is sleeved on the driving beam and placed in the clamping groove, and the two ends of the sealing sleeve are connected to the sealing assembly and the base box respectively to achieve active sealing of the driving beam; The base box is a hollow box structure with a cover plate at the right end face, a hole for the driving beam to pass through is arranged in the middle of the cover plate, and the left end face of the base box is an open structure and is fixedly connected to the opening of the wall of the ash bucket, so that the driving beam passes through the wall of the ash bucket and the base box. The sealing assembly includes a support ring, a first sealing ring, a distance ring, a second sealing ring, and a pressing plate, the first sealing ring, the distance ring, and the second sealing ring are sequentially placed in the support ring from inside to outside, and the pressing plate is connected to the support ring by bolts and arranged on the outside of the second sealing ring to install the first sealing ring, the distance ring, and the second sealing ring in the support ring. The inner hole sizes of the support ring and the pressing plate are larger than the outer diameter of the driving beam, the inner hole sizes of the first sealing ring and the second sealing ring are the same and match the outer diameter of the driving beam to form a transition fit. An annular cavity around the driving beam is formed between the first sealing ring and the second sealing ring by the cooperation of the first sealing ring, the second sealing ring, and the distance ring. An air inlet through hole is arranged on the support ring, an annular groove communicating with the air inlet through hole is arranged on the outer circle of one side of the distance ring, and a plurality of radial through grooves communicating with the annular groove and the inner cavity of the distance ring are arranged on the same side of the distance ring and the annular groove and face the shaft center, so that the air inlet through hole communicates with the annular cavity on the inner side of the distance ring.

2. The seal arrangement based on the grate drive beam according to claim 1, characterized in that The clamping groove is arranged along the axial direction of the driving beam, and the axial width of the sealing assembly is smaller than the axial width of the clamping groove, so that the axial displacement of the sealing assembly is limited and the sealing assembly has a certain space for movement in the clamping groove.

3. The stoker drive beam based sealing arrangement of claim 1, wherein: The cover plate is perpendicular to the driving beam.

4. The stoker drive beam based sealing arrangement of claim 1, wherein: The materials of the first sealing ring and the second sealing ring are polytetrafluoroethylene and polypropylene ammonium, respectively.

5. The stoker drive beam based sealing apparatus of claim 1, wherein: The sealing sleeve is a high-temperature-resistant flexible four-fluorine cloth.

6. The stoker drive beam based sealing arrangement of claim 1, wherein: A secondary air inlet is connected to one end of the air inlet through hole away from the annular groove.

7. The stoker drive beam based sealing apparatus of claim 1, wherein: An oil nozzle is connected to one end of the air inlet through hole away from the annular groove to inject high-temperature lubricating oil into it.

8. The stoker drive beam based sealing arrangement of claim 1, wherein: The base box, the support ring, the first sealing ring, the distance ring, the second sealing ring, and the pressing plate are in a left-right symmetrical form with a middle break to facilitate on-site installation.

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