A waterproof chain guide device for a slag removal machine

Abstract

This utility model discloses a waterproof chain guide device for a slag remover, comprising a bearing housing, a rotating shaft, a bearing, a first sealing end cover, a second sealing end cover, and a chain guide wheel. The bearing housing is detachably mounted on the side wall of the slag remover's cooling water tank by bolts. The bearing is located at the rear end of the rotating shaft, and a through hole is provided in the middle of the bearing housing, into which the bearing is embedded. The first and second sealing end covers are respectively located at both ends of the bearing housing. The front and rear ends of the rotating shaft extend beyond the second and first sealing end covers, respectively. The chain guide wheel is fixed to the front end of the rotating shaft and rotates with the shaft. The outer peripheral wall of the rear end of the bearing housing has a drainage hole communicating with the through hole in the radial direction. The technical solution of this utility model can effectively improve the waterproof performance of the slag remover chain guide device, extend its service life, improve performance stability, ensure continuous and stable production, and improve production and operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of slag removal machine technology, and in particular to a waterproof slag removal machine chain guide device. Background Technology

[0002] In the hazardous waste incineration process, the slag remover (also known as a wet scraper slag remover) is located at the lower part of the connection between the rotary kiln and the secondary combustion chamber. It is a key piece of equipment responsible for slag discharge and transportation. The upper part of the slag remover has a water tank for slag cooling. The high-temperature slag (about 600-800℃) falling from the tail of the rotary kiln is directly immersed in the water in the tank and is rapidly cooled and cracked. At the same time, the water seal effectively isolates the furnace from the external atmosphere, ensuring the stability of the negative pressure and combustion conditions of the entire incineration system.

[0003] The slag removal machine's water tank is equipped with scrapers and a drive chain for removing slag. The scrapers are fixedly connected to the drive chain at both ends, and their bottoms slide against the bottom of the water tank. The drive chain is engaged in a groove on the outer wall of a guide wheel, which acts as a guide. Driven by the chain drive, the scrapers circulate, scraping away the cooled slag submerged in water from the bottom of the water tank and conveying it upwards at a certain angle. During this process, the water carried by the slag naturally flows back under gravity, achieving initial dehydration. Finally, the dehydrated slag is ejected by the scraper at the head of the slag removal machine and falls into a subsequent slag bin or transport vehicle, completing the entire slag removal process.

[0004] Figure 1 The cross-sectional structure of the existing chain guide device for slag removal machines on the market is shown. This chain guide device for slag removal machines has no drainage outlet and it is inconvenient to add bearing lubricating oil. Due to the special working conditions of the slag removal machine, the guide wheel needs to be immersed in water for a long time, which can easily lead to bearing seal failure, resulting in water ingress, lubrication failure and wear of particles, thereby affecting the service life of the slag removal machine and causing the system to stop production.

[0005] Therefore, we propose a chain guide device for slag removers with higher waterproof performance. By optimizing the structural design, we improve the waterproof performance of the chain guide device, thereby extending the service life of key components of the slag remover, ensuring continuous and stable production, and improving production and operation efficiency. Utility Model Content

[0006] The main purpose of this invention is to provide a waterproof chain guide device for a slag removal machine, which aims to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model proposes a waterproof chain guide device for a slag remover, comprising a bearing housing, a rotating shaft, a bearing, a first sealing end cover, a second sealing end cover, and a chain guide wheel. The bearing housing is detachably mounted on the side wall of the slag remover's cooling water tank via bolts. The bearing is located at the rear end of the rotating shaft. The bearing housing has a through hole in the middle, and the bearing is embedded in the through hole. The rotating shaft is rotatably connected to the bearing housing via the bearing. The first and second sealing end covers are detachably mounted on both ends of the bearing housing via bolts. The front and rear ends of the rotating shaft extend beyond the second and first sealing end covers, respectively. The chain guide wheel is fixed to the front end of the rotating shaft and rotates with the rotating shaft. The outer peripheral wall of the chain guide wheel has a chain limiting guide groove along the circumferential direction. The chain guide wheel is located inside the slag remover's cooling water tank. The outer peripheral wall of the rear end of the bearing housing has a drainage hole communicating with the through hole along the radial direction.

[0008] Optionally, it also includes a first spacer sleeve, a second spacer sleeve, an elastic anti-reverse washer, and a sealing nut. The bearing is provided in two sets, each set of bearings being formed by two self-aligning roller bearings arranged side by side. The rear end of the through hole is provided with a bearing mounting groove along the circumferential direction. The outer circumferential wall of the middle of the rotating shaft is provided with a first limiting step along the circumferential direction. The outer circumferential walls of the bearings are all embedded in the bearing mounting groove. The first spacer sleeve and the second spacer sleeve are both sleeved on the rear end of the rotating shaft. The two ends of the first spacer sleeve respectively abut against the bearing. The inner sidewall of the bearing abuts against the bearing mounting groove and the first limiting step. The rear end of the rotating shaft is provided with an external thread. The sealing nut is screwed on the rear end of the rotating shaft. The elastic anti-reverse washer is provided on the inner side of the sealing nut. The two ends of the second spacer sleeve abut against the elastic anti-reverse washer and the bearing respectively. The inner sidewall of the first sealing end cap abuts against the bearing.

[0009] Optionally, it further includes a first skeleton oil seal, which is respectively sleeved on the middle of the rotating shaft and the outer peripheral wall of the second fixed-distance sleeve. The inner sidewall of the first sealing end cover is provided with a first receiving groove along the circumferential direction. The outer peripheral wall of the first skeleton oil seal is respectively embedded in the first receiving groove and the through hole. The inner sidewall of the rear end of the bearing seat is provided with a first lubrication channel. The lower ends of both ends of the first lubrication channel are provided with a first oil inlet communicating with the through hole. The first oil inlet is respectively connected to the gap formed between the two bearings arranged side by side. The upper end of the first lubrication channel is provided with a first oil injection port, and a first sealing bolt is screwed into the first oil injection port.

[0010] Optionally, it further includes a second sealing skeleton, which is sleeved side by side in the middle of the rotating shaft. The outer peripheral walls of the second sealing skeleton abut against the inner peripheral wall of the through hole. The outer peripheral wall of the front end of the rotating shaft is provided with a second limiting step along the circumferential direction. The front end of the inner peripheral wall of the through hole is provided with a third limiting step along the circumferential direction. The front end of the second sealing skeleton abuts against the second limiting step and the third limiting step, respectively. The inner side of the front end of the bearing seat is provided with a second lubrication channel. The lower end of the second lubrication channel is provided with a second oil inlet. The second oil inlet is connected to the gap formed between the side by side second sealing skeletons. The upper end of the second lubrication channel is provided with a second oil injection port. A second sealing bolt is screwed into the second oil injection port.

[0011] Optionally, it also includes a sealing ring, wherein the inner peripheral wall of the through hole is provided with a first groove along the circumferential direction, the sealing ring is embedded in the first groove, the first skeleton oil seal and the second sealing skeleton abut against the sealing ring, the inner peripheral wall of the sealing ring abuts against the outer peripheral wall of the rotating shaft, and the drain hole is located between the two sealing rings.

[0012] Optionally, the inner peripheral walls of the first skeleton oil seal and the second sealing skeleton are provided with deformable sealing lips protruding in the circumferential direction.

[0013] Optionally, it also includes a packing ring, which is sleeved on the outer peripheral wall of the front end of the rotating shaft. The outer peripheral wall of the packing ring abuts against the inner peripheral wall of the through hole, and the two ends of the packing ring abut against the second limiting step and the second end cap, respectively.

[0014] Optionally, the packing ring is made of graphite.

[0015] The technical solution of this utility model has the following beneficial effects: The bearing housing is detachably mounted on the side wall of the cooling water tank of the slag remover via bolts. The bearing is located at the rear end of the rotating shaft. A through hole is provided in the middle of the bearing housing, and the bearing is embedded in the through hole. The rotating shaft is rotatably connected to the bearing housing via the bearing. A first sealing end cap and a second sealing end cap are detachably mounted on both ends of the bearing housing via bolts. The front and rear ends of the rotating shaft extend beyond the second and first sealing end caps, respectively. A chain guide wheel is fixed to the front end of the rotating shaft and rotates with it. The outer circumferential wall of the chain guide wheel is provided with chain limiting and guiding along the circumferential direction. The chain guide wheel is located in the cooling water tank of the slag remover. The outer peripheral wall of the rear end of the bearing housing has a drainage hole connected to the through hole in the radial direction. When sewage enters the inside of the rotating shaft, it can be discharged through the drainage hole. This prevents sewage from entering the bearing and causing bearing failure. Lubricating oil can directly enter the bearing and the skeleton oil seal through the lubrication channel, ensuring that the grease directly penetrates into the bearing balls and the skeleton oil seal, extending the service life of the bearing and the skeleton oil seal, improving their sealing performance, and further improving the waterproof performance of the slag remover chain guide device. This extends the service life of the slag remover chain guide device, ensures its performance stability, ensures continuous and stable production, and improves production and operation efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the existing chain guide device for slag removal machines; Figure 2 This is a schematic diagram of the overall structure of a waterproof slag removal machine chain guide device according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a waterproof slag removal machine chain guide device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of another part of the structure of a waterproof slag removal machine chain guide device according to an embodiment of the present invention.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a waterproof chain guide device for a slag removal machine.

[0023] like Figures 2 to 4 As shown in one embodiment of this utility model, the waterproof slag remover chain guide device includes a bearing seat 101, a rotating shaft 102, a bearing 103, a first sealing end cover 104, a second sealing end cover 105, and a chain guide wheel 106. The bearing seat 101 is detachably mounted on the side wall of the slag remover cooling water tank by bolts. The bearing 103 is located at the rear end of the rotating shaft 102. A through hole 1011 is provided in the middle of the bearing seat 101, and the bearing 103 is embedded in the through hole 1011. The rotating shaft 102 is rotatably connected to the bearing seat 101 through the bearing 103. The first sealing end cover 104 and the second sealing end cover 105 are respectively... The bearing housing 102 is detachably mounted on both ends of the bearing housing 101 by bolts. The front and rear ends of the rotating shaft 102 extend out of the second sealing end cover 105 and the first sealing end cover 104, respectively. The chain guide wheel 106 is fixed to the front end of the rotating shaft 102 and rotates with the rotating shaft 102. The outer peripheral wall of the chain guide wheel 106 is provided with a chain limiting guide groove 1061 along the circumferential direction. The chain guide wheel 106 is located in the cooling water tank of the slag remover. The outer peripheral wall of the rear end of the bearing housing 101 is provided with a drain hole 200 communicating with the through hole along the radial direction. When sewage enters the interior of the rotating shaft, it can be discharged through the drain hole to prevent sewage from entering the bearing and causing bearing failure.

[0024] Specifically, it also includes a first spacer sleeve 107, a second spacer sleeve 108, an elastic anti-reverse washer 109, and a sealing nut 110. Two sets of bearings 103 are provided, each set consisting of two self-aligning roller bearings arranged side-by-side. A bearing mounting groove 1012 is provided at the rear end of the through hole 1011 along the circumferential direction. A first limiting step 1021 is provided on the outer circumferential wall of the rotating shaft 102 in the middle. The outer circumferential walls of the bearings 103 are all embedded in the bearing mounting grooves 1012. The first spacer sleeve 107 and the second spacer sleeve 108 are both fitted onto the rear end of the rotating shaft 102. The two ends of the first spacer sleeve 107 respectively abut against the bearings 103. The inner wall of bearing 103 abuts against bearing mounting groove 1012 and first limiting step 1021. The rear end of rotating shaft 102 is provided with external thread (not shown). Sealing nut 110 is screwed onto the rear end of rotating shaft 102. Elastic anti-reverse washer 109 is provided on the inner side of sealing nut 110. The two ends of second spacer sleeve 108 abut against elastic anti-reverse washer 109 and bearing 103 respectively. The inner wall of first sealing end cap 104 abuts against bearing 103. Through the combined action of first spacer sleeve 107, second spacer sleeve 108, elastic anti-reverse washer 109 and sealing nut 110, the positions of the two sets of bearings are ensured to be accurate and no axial displacement occurs.

[0025] Specifically, the bearing is a self-aligning roller bearing, which has self-aligning capability, extremely high radial load capacity, and improves the overall load capacity of the chain guide wheel.

[0026] Specifically, it also includes a first skeleton oil seal 111, which is respectively sleeved on the middle of the rotating shaft 102 and the outer peripheral wall of the second fixed-distance sleeve 108. The inner sidewall of the first sealing end cover 104 is provided with a first receiving groove 1041 along the circumferential direction. The outer peripheral wall of the first skeleton oil seal 111 is respectively embedded in the first receiving groove 1041 and the through hole 1011. The inner sidewall of the rear end of the bearing seat 101 is provided with a first lubrication channel 1013. The lower ends of both ends of the first lubrication channel 1013 are provided with a first oil inlet 1014 communicating with the through hole. An oil inlet 1014 is connected to the gap formed between two bearings 103 arranged side by side. The upper end of the first lubrication channel 1013 is provided with a first oil filling port (not shown). A first sealing bolt 115 is screwed into the first oil filling port. Lubricating oil can be added to the bearing and the first skeleton oil seal through the first lubrication channel to provide good lubrication to the bearing and the first skeleton oil seal, effectively extending the service life of the bearing and the first skeleton oil seal. At the same time, the lubricating oil acts as an oil seal, which increases the sealing performance to a certain extent, prevents water intrusion, and effectively improves the waterproof performance.

[0027] Specifically, it also includes a second sealing skeleton 112, which is sleeved side by side in the middle of the rotating shaft 102. The outer peripheral walls of the second sealing skeleton 112 abut against the inner peripheral walls of the through holes 1011. The outer peripheral wall of the front end of the rotating shaft 102 is provided with a second limiting step 1022 along the circumferential direction, and the front end of the inner peripheral wall of the through holes 1011 is provided with a third limiting step 1015 along the circumferential direction. The front end of the second sealing skeleton 112 abuts against the second limiting step 1022 and the third limiting step 1015 respectively. The inner side of the front end of the bearing seat 101 is provided with a second lubrication channel 1016. The lower end is provided with a second oil inlet 1017, which is connected to the gap formed between the second oil inlet 1017 and the second sealing skeleton 112 arranged side by side. The upper end of the second lubrication channel 1016 is provided with a second oil injection port (not shown). A second sealing bolt 1018 is screwed into the second oil injection port. Lubricating oil can be added to the second sealing skeleton through the second lubrication channel to lubricate the second sealing skeleton, similar to a sliding bearing, which effectively extends the service life of the second sealing skeleton. At the same time, the lubricating oil acts as an oil seal, which to a certain extent increases the sealing performance between the second sealing skeleton and the rotating shaft, preventing water intrusion and effectively improving the waterproof performance.

[0028] Specifically, it also includes a sealing ring 113. The inner peripheral wall of the through hole 1011 is provided with a first groove 1019 along the circumferential direction. The sealing ring 113 is embedded in the first groove 1019. The first skeleton oil seal 111 and the second sealing skeleton 112 abut against the sealing ring 113. The inner peripheral wall of the sealing ring 113 abuts against the outer peripheral wall of the rotating shaft 102. The drain hole 200 is located between the two sealing rings 113. The sealing rings play a fixing role for the first skeleton oil seal 111 and the second sealing skeleton 112, effectively preventing them from moving along the axial direction and affecting the sealing performance.

[0029] Specifically, the inner peripheral walls of the first skeleton oil seal 111 and the second sealing skeleton 112 are provided with deformable sealing lips (not shown) protruding in the circumferential direction. The sealing lips will deform under radial compression, and the resulting radial clamping force will make the sealing lips fit tightly against the surface of the rotating shaft to prevent the medium from leaking out, effectively improving the sealing performance of the first skeleton oil seal 111 and the second sealing skeleton 112, and effectively improving the waterproof performance.

[0030] Specifically, it also includes a packing ring 114, which is sleeved on the outer peripheral wall of the front end of the rotating shaft 102. The outer peripheral wall of the packing ring 114 abuts against the inner peripheral wall of the through hole 1011. The two ends of the packing ring 114 abut against the second limiting step 1022 and the second end cover 105, respectively. The packing ring is usually woven from a relatively soft thread, and the cross-sectional area is usually square, rectangular, or circular strips filled in the sealing cavity to achieve a seal. The seal is reliable and easy to operate. The pressing force of the packing ring on the rotating shaft is generated by the second sealing end cover. Since the packing ring is an elastic-plastic body, when it is axially pressed, friction is generated, causing the pressing force to gradually decrease along the axial direction. At the same time, the radial pressing force generated makes the packing ring stick tightly to the surface of the rotating shaft to prevent the lubricating grease medium from leaking out, thereby obtaining good sealing performance and further improving the waterproof performance of the slag remover chain guide device.

[0031] Specifically, the packing ring 114 is made of graphite material. Graphite has good self-lubricating properties, a low coefficient of friction, and is wear-resistant; it also has temperature resistance, meaning it can withstand a certain temperature after friction generates heat.

[0032] Specifically, the working principle and process of this utility model are as follows: The bearing housing is detachably mounted on the side wall of the slag remover's cooling water tank via bolts. The bearing is located at the rear end of the rotating shaft. The bearing housing has a through hole in the middle, and the bearing is embedded in the through hole. The rotating shaft is rotatably connected to the bearing housing via the bearing. The first and second sealing end caps are detachably mounted on both ends of the bearing housing via bolts. The front and rear ends of the rotating shaft extend beyond the second and first sealing end caps, respectively. The chain guide wheel is fixed to the front end of the rotating shaft and rotates with the shaft. The outer circumferential wall of the chain guide wheel has a chain limiting guide groove along the circumferential direction. The chain guide wheel is located inside the slag remover's cooling water tank. The outer peripheral wall at the rear end of the bearing housing is provided with a drainage hole communicating with the through hole in the radial direction. When sewage enters the inside of the rotating shaft, it can be discharged through the drainage hole. This prevents sewage from entering the bearing and causing bearing failure. Lubricating oil can directly enter the bearing and the skeleton oil seal through the lubrication channel, ensuring that the grease directly penetrates into the bearing balls and the skeleton oil seal, extending the service life of the bearing and the skeleton oil seal, improving their sealing performance, and further improving the waterproof performance of the slag remover chain guide device. This extends the service life of the slag remover chain guide device, ensures its performance stability, ensures continuous and stable production, and improves production and operation efficiency.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A waterproof chain guide device for a slag removal machine, characterized in that, The system includes a bearing housing, a rotating shaft, a bearing, a first sealing end cap, a second sealing end cap, and a chain guide wheel. The bearing housing is detachably mounted on the side wall of the slag remover's cooling water tank by bolts. The bearing is located at the rear end of the rotating shaft. The bearing housing has a through hole in the middle, and the bearing is embedded in the through hole. The rotating shaft is rotatably connected to the bearing housing through the bearing. The first and second sealing end caps are detachably mounted on both ends of the bearing housing by bolts. The front and rear ends of the rotating shaft extend beyond the second and first sealing end caps, respectively. The chain guide wheel is fixed to the front end of the rotating shaft and rotates with the rotating shaft. The outer peripheral wall of the chain guide wheel has a chain limiting guide groove along the circumferential direction. The chain guide wheel is located inside the slag remover's cooling water tank. The outer peripheral wall of the rear end of the bearing housing has a drain hole communicating with the through hole in the radial direction.

2. The waterproof chain guide device for a slag removal machine according to claim 1, characterized in that, It also includes a first spacer sleeve, a second spacer sleeve, an elastic anti-reverse washer, and a sealing nut. The bearing is provided in two sets, each set of bearings is formed by two self-aligning roller bearings arranged side by side. The rear end of the through hole is provided with a bearing mounting groove along the circumferential direction. The outer circumferential wall of the middle of the rotating shaft is provided with a first limiting step along the circumferential direction. The outer circumferential walls of the bearings are all embedded in the bearing mounting groove. The first spacer sleeve and the second spacer sleeve are both sleeved on the rear end of the rotating shaft. The two ends of the first spacer sleeve respectively abut against the bearing. The inner side wall of the bearing abuts against the bearing mounting groove and the first limiting step. The rear end of the rotating shaft is provided with an external thread. The sealing nut is screwed on the rear end of the rotating shaft. The elastic anti-reverse washer is provided on the inner side of the sealing nut. The two ends of the second spacer sleeve abut against the elastic anti-reverse washer and the bearing respectively. The inner side wall of the first sealing end cap abuts against the bearing.

3. The waterproof chain guide device for a slag removal machine according to claim 2, characterized in that, It also includes a first skeleton oil seal, which is respectively sleeved on the middle of the rotating shaft and the outer peripheral wall of the second fixed-distance sleeve. The inner sidewall of the first sealing end cover is provided with a first receiving groove along the circumferential direction. The outer peripheral wall of the first skeleton oil seal is respectively embedded in the first receiving groove and the through hole. The inner sidewall of the rear end of the bearing seat is provided with a first lubrication channel. The lower ends of both ends of the first lubrication channel are provided with a first oil inlet communicating with the through hole. The first oil inlet is respectively connected to the gap formed between the two bearings arranged side by side. The upper end of the first lubrication channel is provided with a first oil injection port, and a first sealing bolt is screwed into the first oil injection port.

4. The waterproof chain guide device for a slag removal machine according to claim 3, characterized in that, It also includes a second sealing skeleton, which is fitted side by side in the middle of the rotating shaft. The outer peripheral walls of the second sealing skeleton abut against the inner peripheral walls of the through hole. The outer peripheral wall of the front end of the rotating shaft is provided with a second limiting step along the circumferential direction. The front end of the inner peripheral wall of the through hole is provided with a third limiting step along the circumferential direction. The front end of the second sealing skeleton abuts against the second limiting step and the third limiting step, respectively. The inner side of the front end of the bearing seat is provided with a second lubrication channel. The lower end of the second lubrication channel is provided with a second oil inlet. The second oil inlet is connected to the gap formed between the second sealing skeletons arranged side by side. The upper end of the second lubrication channel is provided with a second oil injection port. A second sealing bolt is screwed into the second oil injection port.

5. The waterproof chain guide device for a slag remover according to claim 4, characterized in that, It also includes a sealing ring, the inner peripheral wall of the through hole is provided with a first groove along the circumferential direction, the sealing ring is embedded in the first groove, the first skeleton oil seal and the second sealing skeleton abut against the sealing ring, the inner peripheral wall of the sealing ring abuts against the outer peripheral wall of the rotating shaft, and the drain hole is located between the two sealing rings.

6. The waterproof chain guide device for a slag removal machine according to claim 5, characterized in that, The inner peripheral walls of the first skeleton oil seal and the second sealing skeleton are provided with deformable sealing lips protruding in the circumferential direction.

7. The waterproof chain guide device for a slag removal machine according to claim 4, characterized in that, It also includes a packing ring, which is sleeved on the outer peripheral wall of the front end of the rotating shaft. The outer peripheral wall of the packing ring abuts against the inner peripheral wall of the through hole, and the two ends of the packing ring abut against the second limiting step and the second end cap, respectively.

8. The waterproof chain guide device for a slag removal machine according to claim 7, characterized in that, The packing ring is made of graphite.

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