External chain pressing wheel mechanism

Abstract

The utility model discloses an external chain pressing wheel mechanism which comprises an external transmission box body and a coke oven scraper machine body, a central transmission shaft is rotatably connected in the external transmission box body, a positioning sleeve is sleeved on the outer wall of the central transmission shaft, the positioning sleeve is fixedly connected with the external transmission box body, and the external transmission box body is fixedly connected with the coke oven scraper machine body. The outer wall of the center transmission shaft is sleeved with three first sealing rings, a double-row roller bearing and a spacer bush, and the outer wall of the center transmission shaft is sleeved with a one-way thrust roller bearing and a first adjusting pad. Through comprehensive application of the double-row roller bearing, the one-way thrust roller bearing, multiple sealing, lubricating and tensioning assemblies, the problems of hard friction, high abrasion, frequent maintenance, safety risks and the like of a traditional U-shaped wear-resisting steel plate scheme are solved, material waste and maintenance cost are remarkably reduced, production efficiency and equipment reliability are improved, and the service life of the device is prolonged. The device is suitable for long-term efficient operation of the coke oven scraper.

Description

Technical Field

[0001] This utility model relates to the technical field of coke oven scraper conveyors, and in particular to an external pressure chain wheel mechanism. Background Technology

[0002] Coke oven scraper conveyors are widely used in the production process of coking plants to transport materials such as coke, coke powder, and tar. For example, during the quenching process, the scraper conveyor can scrape coke powder from the settling tank onto the dewatering platform for processing. In addition, it is used at the front of the coke quenching car to transport materials such as red-hot coke, coke briquettes, and tar to the tail coke hopper. The chain is the core transmission component of the scraper conveyor. Driven by the sprocket, it makes the scraper circulate on the track, thereby achieving continuous material conveying. The chain is directly connected to the scraper, transmitting power to the scraper, causing it to slide on the bottom of the trough and move the material. The chain tension directly affects the operational stability of the scraper conveyor. If the chain is too loose, it will cause the scraper to jump, the chain to fall off, or the chain to derail; if the chain is too tight, it will increase the dynamic tension load on the chain links, which may lead to chain breakage or increased equipment vibration.

[0003] Currently, there are two solutions for the chain in the coke oven scraper conveyor at the turning point: the first is to use a U-shaped wear-resistant steel plate to rub against the turning point. The consequence is that the chain and the U-shaped plate have double hard friction, resulting in a lot of material waste and frequent replacement of the U-shaped wear-resistant steel plate. However, replacing the U-shaped wear-resistant steel plate requires hot work, so production must be stopped and the furnace shut down before replacement can be done. However, this poses great risks and difficulties to safe production and improving productivity. Therefore, we propose an external pressure sprocket mechanism to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing an external sprocket mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An external sprocket mechanism includes an external transmission housing and a coke oven scraper conveyor body. A central transmission shaft is rotatably connected inside the external transmission housing. A positioning sleeve is fitted onto the outer wall of the central transmission shaft, and the positioning sleeve is fixedly connected to the external transmission housing. Three first sealing rings are fitted onto the outer wall of the central transmission shaft. A double-row roller bearing and a spacer are fitted onto the outer wall of the central transmission shaft. A one-way thrust roller bearing and a first adjusting shim are fitted onto the outer wall of the central transmission shaft. A first parallel-threaded double cap is threaded onto the outer wall of the central transmission shaft. A rear end cover is fixedly connected to the outer wall of the external transmission housing. A front end cover is fixedly connected to the outer wall of the external transmission housing. A tensioning assembly is provided on the outer wall of the front end cover.

[0007] Preferably, the tensioning assembly includes a wheel body, three second sealing rings are placed inside the front end cover, the outer wall of the central drive shaft is fixedly connected to the inner wall of the wheel body, a second adjusting pad is sleeved on the outer wall of the central drive shaft, a second parallel thread double cap is threaded on the outer wall of the central drive shaft, two wall plates are fixedly installed on the outer wall of the coke oven scraper machine body, and the outer wall of the positioning sleeve is fixedly connected to the outer wall of the wall plate. The tensioning assembly ensures the stable transmission of the internal chain of the coke oven scraper machine body.

[0008] Preferably, the inner wall of the external transmission housing is provided with three annular grooves, and the inner walls of the three annular grooves respectively contact the outer walls of the three first sealing rings. By providing three first annular grooves, the sealing between the central transmission shaft and the external transmission housing is increased.

[0009] Preferably, the outer walls of the spacer and the first adjusting pad are in contact with the inner wall of the external transmission housing.

[0010] Preferably, the outer rings of the double-row roller bearing and the unidirectional thrust roller bearing are in contact with the inner wall of the external transmission housing.

[0011] Preferably, the outer wall of the external transmission housing is provided with an oil injection hole, and an oil injection nozzle is installed on the inner wall of the oil injection hole. By opening the oil injection nozzle, lubricating oil can be added to the interior of the external transmission housing.

[0012] Preferably, the inner wall of the front end cover is rotatably connected to the outer wall of the central drive shaft.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This solution, through the comprehensive application of double-row roller bearings, unidirectional thrust roller bearings, multiple seals, lubrication and tensioning components, solves the problems of hard friction, high wear, frequent maintenance and safety risks of traditional U-shaped wear-resistant steel plate solutions. It significantly reduces material waste and maintenance costs, improves production efficiency and equipment reliability, and is suitable for the long-term and efficient operation of coke oven scraper conveyors. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments 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 these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional structural diagram of an external pressure sprocket mechanism proposed in this utility model;

[0017] Figure 2This is an exploded structural diagram of an external sprocket mechanism proposed in this utility model;

[0018] Figure 3 This is a top view cross-sectional diagram of the coke discharge trough of an external pressure chain wheel mechanism proposed in this utility model;

[0019] Figure 4 This is a side cross-sectional view of the coke discharge trough structure of an external pressure chain wheel mechanism proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the wheel structure of an external sprocket mechanism proposed in this utility model.

[0021] In the diagram: 1. External transmission housing; 2. Central transmission shaft; 3. Positioning sleeve; 4. First sealing ring; 5. Double row roller bearing; 6. Spacer; 7. One-way thrust roller bearing; 8. First adjusting shim; 9. First parallel thread double cap; 10. Rear end cover; 11. Oil injection nozzle; 12. Second sealing ring; 13. Front end cover; 14. Wheel body; 15. Second adjusting shim; 16. Second parallel thread double cap; 17. Coke oven scraper conveyor body; 18. Wall panel. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] Depend on Figures 1-5 As shown, an external sprocket mechanism is disclosed, comprising an external transmission housing 1 and a coke oven scraper body 17. The coke oven scraper body 17 has a coke discharge trough inside. A central transmission shaft 2 is rotatably connected inside the external transmission housing 1. A positioning sleeve 3 is fitted on the outer wall of the central transmission shaft 2. The positioning sleeve 3 is fixedly connected to the external transmission housing 1. Three first sealing rings 4 are fitted on the outer wall of the central transmission shaft 2. Three annular grooves are formed on the inner wall of the external transmission housing 1. The inner walls of the three annular grooves respectively contact the outer walls of the three first sealing rings 4. The three first sealing rings 4 and the three second sealing rings 12 adopt an O-type structure to increase the sealing performance and play a role in dust prevention and waterproofing.

[0024] The outer wall of the central drive shaft 2 is fitted with a double-row roller bearing 5 and a spacer 6. The outer wall of the central drive shaft 2 is fitted with a one-way thrust roller bearing 7 and a first adjusting shim 8. The outer rings of the double-row roller bearing 5 and the one-way thrust roller bearing 7 are in contact with the inner wall of the external transmission housing 1. The double-row roller bearing 5 and the one-way thrust roller bearing 7 are used to assist the central drive shaft 2 in rotating, reducing friction and wear. The outer walls of the spacer 6 and the first adjusting shim 8 are in contact with the inner wall of the external transmission housing 1.

[0025] The outer wall of the central drive shaft 2 is threaded with a first parallel thread double cap 9. The outer wall of the external drive housing 1 is fixedly connected with a rear end cover 10. The outer wall of the external drive housing 1 is provided with an oil injection hole. An oil injection nozzle 11 is installed on the inner wall of the oil injection hole. Lubricating oil is provided through the oil injection nozzle 11 to reduce friction and heat generation in the external drive housing 1. The outer wall of the external drive housing 1 is fixedly connected with a front end cover 13. The inner wall of the front end cover 13 is rotatably connected to the outer wall of the central drive shaft 2.

[0026] The outer wall of the front cover 13 is equipped with a tensioning assembly, which includes a wheel 14. The inner hole of the wheel 14 is lined with copper and has a transition fit with the central drive shaft 2. The wheel 14 rolls with the chain in the sealed coke discharge trough. Compared with the existing U-shaped plate, the rolling of the wheel 14 greatly reduces the coefficient of friction, slowing down the excessive and premature wear and replacement rate of the chain. The front cover 13 has three second sealing rings 12 inside. The three first sealing rings 4 and the three second sealing rings 12 completely isolate the external transmission box 1 and the water tank, preventing impurities and water from entering the interior of the external transmission box 1, thereby maintaining normal lubrication inside the external transmission box 1. Because the rolling bearing rotates flexibly, the operating load of the scraper conveyor is greatly reduced, the stability is significantly improved, and maintenance is convenient. Replacement only requires disassembling the bolts, avoiding hot work and avoiding the explosion risk in the gas operation area. Because the bearing can be effectively lubricated, the service life and stability of the pressure sprocket are consolidated, greatly reducing excessive maintenance costs, and making loss reduction and consumption reduction work a reality, laying a good foundation for normal production.

[0027] The outer wall of the central drive shaft 2 is fixedly connected to the inner wall of the wheel body 14. The outer wall of the central drive shaft 2 is fitted with a second adjusting pad 15. The outer wall of the central drive shaft 2 is threaded with a second parallel thread double cap 16. Two wall plates 18 (the material of the wall plate 18 is Q235B-4mm) are fixedly installed on the outer wall of the coke oven scraper machine body 17. The outer wall of the positioning sleeve 3 is fixedly connected to the outer wall of the wall plate 18.

[0028] All standard parts used in this utility model can be purchased from the market. Irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. Furthermore, the structure and principle of the components known to those skilled in the art can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0029] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An external compression sprocket mechanism comprising an external transmission case (1) and a coke oven scraper body (17), characterized in that, The outer transmission box (1) is internally rotatably connected with a center transmission shaft (2), the outer wall of the center transmission shaft (2) is sleeved with a positioning sleeve (3), the positioning sleeve (3) is fixedly connected with the outer transmission box (1), the outer wall of the center transmission shaft (2) is sleeved with three first sealing rings (4), the outer wall of the center transmission shaft (2) is sleeved with a double-row roller bearing (5) and a spacer sleeve (6), the outer wall of the center transmission shaft (2) is sleeved with a one-way thrust roller bearing (7) and a first adjusting pad (8), the outer wall of the center transmission shaft (2) is threadedly sleeved with a first double-cap (9), the outer wall of the outer transmission box (1) is fixedly connected with a rear end cover (10), the outer wall of the outer transmission box (1) is fixedly connected with a front end cover (13), the outer wall of the front end cover (13) is provided with a tensioning assembly.

2. An external press chain wheel mechanism according to claim 1, wherein The tensioning assembly comprises a wheel body (14), the inner part of the front end cover (13) is placed with three second sealing rings (12), the outer wall of the center transmission shaft (2) is fixedly connected with the inner wall of the wheel body (14), the outer wall of the center transmission shaft (2) is sleeved with a second adjusting pad (15), the outer wall of the center transmission shaft (2) is threadedly sleeved with a second double-cap (16), the outer wall of the coke oven scraper body (17) is fixedly installed with two wallboards (18), the outer wall of the positioning sleeve (3) is fixedly connected with the outer wall of the wallboard (18).

3. An external press chain wheel mechanism according to claim 1, wherein The inner wall of the outer transmission box (1) is provided with three annular grooves, the inner wall of the three annular grooves is respectively in contact with the outer wall of the three first sealing rings (4).

4. An external press chain wheel mechanism according to claim 1, wherein The outer wall of the spacer sleeve (6) and the first adjusting pad (8) is in contact with the inner wall of the outer transmission box (1).

5. An external press chain wheel mechanism according to claim 1, wherein The outer ring of the double-row roller bearing (5) and the one-way thrust roller bearing (7) is in contact with the inner wall of the outer transmission box (1).

6. An external press chain wheel mechanism according to claim 1, wherein The outer wall of the outer transmission box (1) is provided with an oil injection hole, and the inner wall of the oil injection hole is installed with an oil injection nozzle (11).

7. An external press chain wheel mechanism according to claim 1, wherein The inner wall of the front end cover (13) is rotatably connected with the outer wall of the center transmission shaft (2).

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