Crushing roller assembly of grate cooler

Abstract

The utility model provides a grate cooler crushing roller assembly, which comprises a hollow shaft and a liquid separation joint, a crushing roller sleeve, bearings and gears are fixedly sleeved on the hollow shaft, the bearings are arranged on two sides of the crushing roller sleeve, the gears are arranged at the end part of the hollow shaft, a shaft cover is arranged on one end surface of the hollow shaft in a sealing way, and the shaft cover is arranged on the other end surface of the hollow shaft. The end, away from the shaft cover, of the hollow shaft is connected with the liquid separation connector in a dynamic sealing mode, an inner pipe coaxial with the hollow shaft is arranged in the hollow shaft, an annular cavity is formed between the inner pipe and the hollow shaft, a liquid inlet and a liquid outlet are formed in the liquid separation connector, the annular cavity is communicated with the liquid inlet, and the inner pipe is communicated with the liquid outlet. When the crushing roller assembly operates in a high-temperature environment, heat conduction oil continuously exists to uniformly exchange heat for the crushing roller assembly, so that the temperature of the crushing roller assembly when the crushing roller assembly works under a high-temperature working condition is reduced, and the service life of the crushing roller assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of grate coolers, in particular to a crushing roller assembly of a grate cooler. Background Art

[0002] Grate coolers are commonly used in the metallurgical and cement industries. They are a type of rapid cooling equipment that can quickly reduce the temperature of materials. For example, in the industrial extraction process of lithium, the raw material spodumene is roasted and transformed in a rotary kiln to form a roasted material. The roasted material temperature can reach over 1000°C. A grate cooler is needed to cool the roasted material to about 100°C, and at the same time, the heat of the roasted material is recovered through cooling air.

[0003] The grate cooler includes a crushing device, which is used to crush the roasted material after roasting to facilitate the subsequent acidification process. The crushing device in the existing grate cooler is either set at the tail of the grate cooler or in the middle of the grate cooler. When the crushing device is set at the tail of the grate cooler, the heat inside the large-particle roasted material cannot be taken away by the cooling air in the grate cooler. After the large-particle roasted material is crushed, its internal heat is released and affects the overall cooling quality of the roasted material, which is not conducive to the subsequent acidification process; when the crushing device is set in the middle of the grate cooler, the roasted material can be completely crushed during the cooling process of the grate cooler, so that the cooling air can fully take away the heat therein, but the material temperature at the crushing device in the middle of the grate cooler is relatively high, and the crushing roller assembly therein will be seriously damaged if the crushing device operates under high temperature conditions for a long time. Summary of the invention

[0004] The utility model provides a crushing roller assembly of a grate cooler, so as to solve the technical problem in the prior art that the crushing roller assembly in a central crushing device of a grate cooler is easily damaged when running in a high temperature environment.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: the utility model provides a grate cooler crushing roller assembly, which includes a hollow shaft and a liquid separation joint, a crushing roller sleeve, a bearing, and a gear are provided on the fixed sleeve on the hollow shaft, the bearings are installed on both sides of the crushing roller sleeve, the gear is arranged at the end of the hollow shaft, a shaft cover is sealed on one end face of the hollow shaft, the end of the hollow shaft away from the shaft cover is dynamically sealed with the liquid separation joint, an inner tube coaxial with the hollow shaft is provided in the hollow shaft, an annular cavity is formed between the inner tube and the hollow shaft, a liquid inlet and a liquid outlet are provided on the liquid separation joint, the annular cavity is connected with the liquid inlet, and the inner tube is connected with the liquid outlet.

[0006] Furthermore, the liquid separation joint includes a shell, a liquid inlet and a liquid outlet are arranged on the shell, the shell is rotatably connected to the hollow shaft, the shell and the hollow shaft are dynamically sealed, a liquid inlet cavity is formed in the shell, the annular cavity is connected to the liquid inlet cavity, and the liquid inlet is connected to the liquid inlet cavity; one end of the inner tube away from the shaft cover is rotatably connected to the liquid outlet on the shell, and the inner tube and the liquid outlet are dynamically sealed.

[0007] Furthermore, the liquid inlet is arranged on the shell wall opposite to the annular cavity, the liquid outlet is arranged on the side wall of the shell, the liquid outlet extends into the liquid inlet cavity with an elbow, the elbow is rotatably connected to the inner tube, and the elbow is dynamically sealed to the inner tube.

[0008] Furthermore, it also includes a support frame, which is arranged in the annular cavity, fixedly connected to the inner tube, and fixedly connected to the hollow shaft.

[0009] Furthermore, a rounded structure is formed between the side of the shaft cover close to the inner tube and the inner wall of the shaft cover, a guide block protrudes from the middle of the side of the shaft cover close to the inner tube, the height of the guide block gradually decreases from the middle to the surrounding areas, and the middle of the guide block faces the middle of the inner tube.

[0010] Furthermore, the end face of the hollow shaft is threadedly connected and fixed to the shaft cover, and a sealing ring is provided between the shaft cover and the hollow shaft.

[0011] Furthermore, the crushing roller sleeve and the hollow shaft are connected via a first key transmission, the gear and the hollow shaft are connected via a second key transmission, a fastening device is provided on the hollow shaft, and the crushing roller sleeve, the bearing and the gear are axially fixed on the hollow shaft via the fastening device.

[0012] Furthermore, a shaft shoulder is provided on the hollow shaft, the fastening device includes a plurality of first wedge blocks and a plurality of second wedge blocks, a plurality of slide grooves are arranged in a ring array on the outer wall of the hollow shaft, the first wedge block is slidably installed in the slide groove, the second wedge block is threadedly connected to the hollow shaft, the inclined surfaces of the first wedge block and the second wedge block are in contact with each other, and the crushing roller sleeve, bearing and gear are installed and fixed between the first wedge block and the shaft shoulder.

[0013] Furthermore, a heat insulation layer is provided on the inner tube.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is a grate cooler crushing roller assembly, which is used in the central crushing device of the grate cooler. A hollow shaft is used to drive the crushing roller sleeve. The hollow shaft cooperates with the inner tube therein to form a coolant circuit. The annular cavity is directly connected to the liquid inlet of the coolant. The coolant is preferably heat transfer oil. The heat transfer oil directly enters the annular cavity outside the inner tube after passing through the liquid separation joint. The annular cavity is close to the crushing roller sleeve, so that the heat transfer oil can immediately exchange heat with the crushing roller sleeve as soon as it enters the assembly, thereby enhancing the heat exchange efficiency of the assembly. After heat exchange, the heat transfer oil flows out from the inner tube in the middle, so that the heat transfer oil continues to exist during the operation of the assembly to evenly exchange heat for the crushing roller assembly, thereby reducing the temperature of the crushing roller assembly itself when working under high temperature conditions, thereby increasing the service life of the crushing roller assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of a crushing roller assembly of a grate cooler involved in Example 1 of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of a crushing roller assembly of a grate cooler involved in Example 2 of the utility model;

[0017] Figure 3 for Figure 1 or Figure 2 A partial enlarged view of point A in the middle.

[0018] Illustrations: 1-gear; 2-second key; 3-bearing; 4-bracket; 5-first key; 6-crushing roller sleeve; 7-inner tube; 8-dynamic sealing device; 9-liquid separation joint; 91-liquid inlet; 92-liquid outlet; 921-elbow; 93-liquid inlet chamber; 94-housing; 10-dynamic sealing device; 11-hollow shaft; 111-shaft shoulder; 112-slideway; 12-annular chamber; 13-guide block; 14-shaft cover; 15-sealing ring; 16-second wedge block; 17-first wedge block; 18-screw. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the following will further describe the implementation of the utility model in conjunction with the accompanying drawings. The following is a preferred embodiment of the utility model among multiple possible embodiments, which is intended to provide a basic understanding of the utility model, but is not intended to confirm the key or decisive elements of the utility model or limit the scope of protection.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation methods of the present invention are not limited thereto.

[0022] Example 1

[0023] See also Figure 1 , 3The utility model provides a crushing roller assembly of a grate cooler, which includes a hollow shaft 11 and a liquid separation joint 9. A crushing roller sleeve 6, a bearing 3, and a gear 1 are fixedly sleeved on the hollow shaft 11. The bearing 3 is installed on both sides of the crushing roller sleeve 6. The gear 1 is arranged at the end of the hollow shaft 11. A shaft cover 14 is sealed and installed on one end surface of the hollow shaft 11. The end of the hollow shaft 11 away from the shaft cover 14 is dynamically sealed and connected with the liquid separation joint 9. An inner tube 7 coaxial with the hollow shaft 11 is arranged in the hollow shaft 11, and an annular cavity 12 is formed between the inner tube 7 and the hollow shaft 11. A liquid inlet 91 and a liquid outlet 92 are provided on the liquid separation joint 9. The annular cavity 12 is connected with the liquid inlet 91, and the inner tube 7 is connected with the liquid outlet 92.

[0024] See also Figure 1 , 3 The liquid separation joint 9 includes a shell 94, a liquid inlet 91 and a liquid outlet 92 are arranged on the shell, the shell 94 is rotatably connected to the hollow shaft 11, the shell 94 and the hollow shaft 11 are dynamically sealed by a dynamic sealing device 8, a liquid inlet cavity 93 is formed in the shell 94, the annular cavity 12 is connected to the liquid inlet cavity 93, and the liquid inlet 91 is connected to the liquid inlet cavity 93; one end of the inner tube 7 away from the shaft cover 14 is rotatably connected to the liquid outlet 92 on the shell, and the inner tube 7 and the liquid outlet 9 are dynamically sealed by a dynamic sealing device 10.

[0025] See also Figure 1 , 3 , this embodiment also includes a support frame 4, the support frame 4 is arranged in the annular cavity 12, the support frame 4 is fixedly connected to the inner tube 7, and the support frame 4 is fixedly connected to the hollow shaft 11. The side of the shaft cover 14 close to the inner tube 7 and the inner wall of the shaft cover are rounded structures, and the middle part of the side of the shaft cover 14 close to the inner tube protrudes with a guide block 13, and the height of the guide block 13 gradually decreases from the middle to the surroundings. The middle part of the guide block 13 faces the middle part of the inner tube 7. The guide block 13 and the rounded structure are used to reduce the flow resistance of the coolant therein, so that the liquid in the annular cavity 12 can smoothly enter the inner tube 7, reducing the energy consumption of the coolant supply. The end face of the hollow shaft 11 is threadedly connected and fixed to the shaft cover 14, and a sealing ring 15 is provided between the shaft cover 14 and the hollow shaft 11.

[0026] See also Figure 1 , 3The crushing roller sleeve 6 and the hollow shaft 11 are connected by a first key 5, and the gear 1 and the hollow shaft 11 are connected by a second key 2. A fastening device is provided on the hollow shaft 11, and the crushing roller sleeve 6, the bearing 3, and the gear 1 are axially fixed on the hollow shaft 11 by the fastening device. A shaft shoulder 111 is provided on the hollow shaft 11. The fastening device in this embodiment includes two first wedge blocks 17 and two second wedge blocks 16. Two slide grooves 112 are arranged in an annular array on the outer wall of the hollow shaft 11. The first wedge block 17 is slidably installed in the slide groove 112. The second wedge block 16 is threadedly connected to the hollow shaft 11. In this embodiment, the second wedge block 16 is threadedly connected and fixed to the hollow shaft 11 by a screw 18. The inclined surfaces of the first wedge block 17 and the second wedge block 16 contact each other. The crushing roller sleeve 6, the bearing 3, and the gear 1 are installed and fixed between the first wedge block 17 and the shaft shoulder 111. The crushing roller sleeve 6, the bearing 3, and the gear 1 can be axially fixed by tightening the screw 18. A heat insulation layer is provided on the inner tube 7 to prevent the high-temperature coolant after heat exchange in the inner tube 7 from affecting the coolant newly flowing into the annular cavity 12, thereby improving the heat exchange efficiency of the coolant.

[0027] The grate cooler crushing roller assembly involved in the utility model is applied to the center crushing device of the grate cooler, and adopts the hollow shaft 7 to drive the crushing roller sleeve 6, the hollow shaft 11 cooperates with the inner tube 7 therein to form a coolant circuit, and the annular cavity 12 is connected with the liquid inlet 91 of the coolant. Due to the high heat exchange temperature, the coolant is preferably heat-conducting oil, and the heat-conducting oil is directly input into the annular cavity 12 outside the inner tube after being input through the liquid inlet 91 on the liquid separation joint 9. The annular cavity is close to the crushing roller sleeve 6, so that the heat-conducting oil can immediately exchange heat with the crushing roller sleeve 6 as soon as it enters the crushing roller assembly, thereby enhancing the heat exchange efficiency of the heat-conducting oil. After the heat exchange, the heat-conducting oil flows out from the inner tube 7 again, flows back to the liquid separation joint 9 and is discharged from the liquid outlet 92. The heat insulation layer arranged on the inner tube 7 prevents the heat-conducting oil from transferring the high temperature to the annular cavity 12 after the heat exchange, thereby affecting the heat exchange efficiency. When the crushing roller assembly is in operation, the heat transfer oil continuously exists to evenly exchange heat for the crushing roller assembly, thereby reducing the temperature of the crushing roller assembly itself when working under high temperature conditions and increasing the service life of the crushing roller assembly.

[0028] Example 2

[0029] See also Figure 2 , 3The utility model provides a crushing roller assembly of a grate cooler, which includes a hollow shaft 11 and a liquid separation joint 9. A crushing roller sleeve 6, a bearing 3, and a gear 1 are fixedly sleeved on the hollow shaft 11. The bearing 3 is installed on both sides of the crushing roller sleeve 6. The gear 1 is arranged at the end of the hollow shaft 11. A shaft cover 14 is sealed and installed on one end surface of the hollow shaft 11. The end of the hollow shaft 11 away from the shaft cover 14 is dynamically sealed and connected with the liquid separation joint 9. An inner tube 7 coaxial with the hollow shaft is arranged in the hollow shaft 11, and an annular cavity 12 is formed between the inner tube 7 and the hollow shaft 11. A liquid inlet 91 and a liquid outlet 92 are provided on the liquid separation joint 9. The annular cavity 12 is connected with the liquid inlet 91, and the inner tube 7 is connected with the liquid outlet 92.

[0030] See also Figure 2 , 3 , the liquid-separating joint 9 includes a shell 94, a liquid inlet 91 and a liquid outlet 92 are arranged on the shell, the shell 94 is rotatably connected to the hollow shaft 11, the shell 94 and the hollow shaft 11 are dynamically sealed by the dynamic sealing device 8, a liquid inlet cavity 93 is formed in the shell 94, the annular cavity 12 is connected to the liquid inlet cavity 93, and the liquid inlet 91 is connected to the liquid inlet cavity 93; the end of the inner tube 7 away from the shaft cover 14 is rotatably connected to the liquid outlet 92 on the shell, and the inner tube 7 is dynamically sealed with the liquid outlet 9. The liquid inlet 91 in this embodiment is arranged on the shell wall opposite to the annular cavity 12, and the liquid outlet 92 is arranged on the side wall of the shell 94, and the liquid outlet 92 extends into the liquid inlet cavity with an elbow 921, the elbow 921 is rotatably connected to the inner tube 7, and the elbow 921 is dynamically sealed with the inner tube 7 by the dynamic sealing device 10. The direction in which the heat transfer oil or other coolant enters the crushing roller assembly is the same as the direction of the annular cavity 12 in the crushing roller assembly. The coolant directly enters the annular cavity 12 without changing direction, thereby reducing the flow resistance of the coolant.

[0031] See also Figure 2 , 3 , this embodiment also includes a support frame 4, the support frame 4 is arranged in the annular cavity 12, the support frame 4 is fixedly connected to the inner tube 7, and the support frame 4 is fixedly connected to the hollow shaft 11. The side of the shaft cover 14 close to the inner tube 7 and the inner wall of the shaft cover are rounded structures, and the middle part of the side of the shaft cover 14 close to the inner tube protrudes with a guide block 13, and the height of the guide block 13 gradually decreases from the middle to the surroundings. The middle part of the guide block 13 faces the middle part of the inner tube 7. The guide block and the rounded structure are used to reduce the flow resistance of the coolant therein, so that the liquid in the annular cavity can smoothly enter the inner tube, reducing the energy consumption of the coolant supply. The end face of the hollow shaft 11 is threadedly connected and fixed to the shaft cover 14, and a sealing ring 15 is provided between the shaft cover 14 and the hollow shaft 11.

[0032] See also Figure 2 , 3The crushing roller sleeve 6 is connected to the hollow shaft 11 by a first key 5, and the gear 1 is connected to the hollow shaft 11 by a second key 2. A fastening device is provided on the hollow shaft 11, and the crushing roller sleeve 6, the bearing 3, and the gear 1 are axially fixed on the hollow shaft 11 by the fastening device. A shoulder 111 is provided on the hollow shaft 11, and the fastening device includes two first wedge blocks 17 and two second wedge blocks 16. Two slide grooves 112 are arranged in an annular array on the outer wall of the hollow shaft 11. The first wedge block 17 is slidably installed in the slide groove 112, and the second wedge block 16 is threadedly connected to the hollow shaft 11. In this embodiment, the second wedge block 16 is threadedly connected and fixed to the hollow shaft 11 by a screw 18. The inclined surfaces of the first wedge block 17 and the second wedge block 16 contact each other. The crushing roller sleeve 6, the bearing 3, and the gear 1 are installed and fixed between the first wedge block 17 and the shoulder 111. The crushing roller sleeve 6, the bearing 3, and the gear 1 can be axially fixed by tightening the screw 18. The inner tube 7 is provided with a heat insulation layer to prevent the high-temperature coolant after heat exchange in the inner tube 7 from affecting the coolant newly flowing into the annular cavity, thereby improving the heat exchange efficiency of the coolant.

[0033] The grate cooler crushing roller assembly involved in the utility model is applied to the center crushing device of the grate cooler, and adopts the hollow shaft 7 to drive the crushing roller sleeve 6, the hollow shaft 11 cooperates with the inner tube 7 therein to form a coolant circuit, and the annular cavity 12 is connected with the liquid inlet 91 of the coolant. Due to the high heat exchange temperature, the coolant is preferably heat-conducting oil, and the heat-conducting oil is directly input into the annular cavity 12 outside the inner tube after being input through the liquid inlet 91 on the liquid separation joint 9. The annular cavity is close to the crushing roller sleeve 6, so that the heat-conducting oil can immediately exchange heat with the crushing roller sleeve 6 as soon as it enters the crushing roller assembly, thereby enhancing the heat exchange efficiency of the heat-conducting oil. After the heat exchange, the heat-conducting oil flows out from the inner tube 7 again, flows back to the liquid separation joint 9 and is discharged from the liquid outlet 92. The heat insulation layer arranged on the inner tube 7 prevents the heat-conducting oil from transferring the high temperature to the annular cavity 12 after the heat exchange, thereby affecting the heat exchange efficiency. When the crushing roller assembly is in operation, the heat transfer oil continuously exists to evenly exchange heat for the crushing roller assembly, thereby reducing the temperature of the crushing roller assembly itself when working under high temperature conditions and increasing the service life of the crushing roller assembly.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crushing roller assembly for a grate cooler, characterized in that: It includes a hollow shaft and a liquid separation joint. A crushing roller sleeve, a bearing and a gear are fixedly provided on the hollow shaft. The bearings are installed on both sides of the crushing roller sleeve. The gear is arranged at the end of the hollow shaft. A shaft cover is sealed on one end face of the hollow shaft. The end of the hollow shaft away from the shaft cover is dynamically sealed with the liquid separation joint. An inner tube coaxial with the hollow shaft is provided in the hollow shaft. An annular cavity is formed between the inner tube and the hollow shaft. A liquid inlet and a liquid outlet are provided on the liquid separation joint. The annular cavity is connected to the liquid inlet, and the inner tube is connected to the liquid outlet.

2. The crushing roller assembly of the grate cooler according to claim 1, characterized in that: The liquid separation joint includes a shell, a liquid inlet and a liquid outlet are arranged on the shell, the shell is rotatably connected to the hollow shaft, the shell and the hollow shaft are dynamically sealed, a liquid inlet cavity is formed in the shell, the annular cavity is connected to the liquid inlet cavity, and the liquid inlet is connected to the liquid inlet cavity; one end of the inner tube away from the shaft cover is rotatably connected to the liquid outlet on the shell, and the inner tube and the liquid outlet are dynamically sealed.

3. The crushing roller assembly of the grate cooler according to claim 2, characterized in that: The liquid inlet is arranged on the shell wall opposite to the annular cavity, the liquid outlet is arranged on the side wall of the shell, the liquid outlet is provided with an elbow extending into the liquid inlet cavity, the elbow is rotatably connected to the inner tube, and the elbow is dynamically sealed to the inner tube.

4. The crushing roller assembly of the grate cooler according to claim 1, characterized in that: It also includes a support frame, which is arranged in the annular cavity, fixedly connected to the inner tube, and fixedly connected to the hollow shaft.

5. The crushing roller assembly of the grate cooler according to claim 1, characterized in that: The side of the shaft cover close to the inner tube and the inner wall of the shaft cover are rounded structures, and a guide block protrudes from the middle of the side of the shaft cover close to the inner tube. The height of the guide block gradually decreases from the middle to the surrounding areas, and the middle of the guide block faces the middle of the inner tube.

6. The crushing roller assembly of the grate cooler according to claim 1, characterized in that: The end surface of the hollow shaft is threadedly connected and fixed to the shaft cover, and a sealing ring is arranged between the shaft cover and the hollow shaft.

7. The crushing roller assembly of the grate cooler according to claim 1, characterized in that: The crushing roller sleeve and the hollow shaft are connected via a first key transmission, the gear and the hollow shaft are connected via a second key transmission, a fastening device is provided on the hollow shaft, and the crushing roller sleeve, the bearing and the gear are axially fixed on the hollow shaft via the fastening device.

8. The crushing roller assembly of the grate cooler according to claim 7, characterized in that: A shaft shoulder is provided on the hollow shaft, and the fastening device includes a plurality of first wedge blocks and a plurality of second wedge blocks. A plurality of slide grooves are arranged in a ring array on the outer wall of the hollow shaft. The first wedge block is slidably installed in the slide groove, and the second wedge block is threadedly connected to the hollow shaft. The inclined surfaces of the first wedge block and the second wedge block contact each other, and the crushing roller sleeve, bearing, and gear are installed and fixed between the first wedge block and the shaft shoulder.

9. The crushing roller assembly of the grate cooler according to claim 7, characterized in that: A heat insulation layer is provided on the inner tube.

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