A kiln roof structure for calcium carbonate calcining kilns

Abstract

This application relates to a kiln roof structure for a calcium carbonate calcining kiln, belonging to the field of calcining kilns. It is installed at the top of the kiln and includes a feed pipe and a feed box. The feed pipe is rotatably connected to the kiln, and the feed box is mounted on the kiln, with its discharge end opposite to the feed pipe. A cleaning assembly is provided on the kiln. The cleaning assembly includes a support, a connecting rod, and a cleaning seat. The support is mounted on the kiln, and the connecting rod is rotatably connected to the support. A support shaft is rotatably connected to the connecting rod, and the cleaning seat is mounted on the support shaft. An abutment wheel is provided on the support shaft, and the abutment wheel abuts against the inner wall of the feed pipe. During the rotation of the feed pipe, the abutment wheel rotates along with it and controls the continuous rotation of the cleaning plate to clean any material that may remain on the inner wall of the feed pipe. This ensures that the material enters the kiln more stably from the feed pipe, thereby improving the stability of the calcining kiln roof during use.

Description

Technical Field

[0001] This application relates to the field of calcining kilns, and more particularly to a kiln roof structure for a calcium carbonate calcining kiln. Background Technology

[0002] Calcination of calcium carbonate is a key step in the preparation of calcium oxide, and it is usually carried out in a vertical kiln. The kiln top is the inlet for material input and also the channel for high-temperature flue gas discharge. Its structural performance directly affects the kiln's calcination efficiency, energy consumption level, flue gas emission quality, and operational stability.

[0003] The current kiln top structure mainly includes a rotary distributor and a feeding box. Both the rotary distributor and the feeding box are mounted on the top of the kiln. The feeding box is used to transport the material to be processed to the rotary distributor, which then distributes the material relatively evenly into the kiln so that the material can be fully burned in the future.

[0004] In actual use at the kiln top, some material tends to remain at the feed end of the rotary distributor, causing errors in the feed rate and resulting in a discrepancy between the amount of material in the kiln and the actual demand. Therefore, this issue needs to be addressed. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a kiln roof structure for a calcium carbonate calcining kiln.

[0006] This application provides a kiln roof structure for a calcium carbonate calcining kiln, which adopts the following technical solution: A kiln roof structure for a calcium carbonate calcining kiln is provided on the top of the kiln and includes a feed pipe and a feed box. The feed pipe is rotatably connected to the kiln, and the feed box is mounted on the kiln. The discharge end of the feed box is positioned opposite to the feed pipe. The kiln is equipped with a cleaning assembly, which includes a support, a connecting rod, and a cleaning seat. The support is mounted on the kiln, the connecting rod is rotatably connected to the support, and a support shaft is rotatably connected to the connecting rod. The cleaning seat is mounted on the support shaft, and an abutment wheel is mounted on the support shaft. The abutment wheel abuts against the inner wall of the feed pipe.

[0007] By adopting the above technical solution, during the feeding process of the calcining kiln, the feed box conveys the material into the feed pipe. Simultaneously, the worker controls the rotation of the connecting rod, which drives the support shaft and the cleaning seat to rotate, causing the cleaning seat to abut against the inner wall of the feed pipe. During the kiln feeding process, the feed pipe rotates to distribute the material more evenly into the kiln. At the same time, under the action of the abutting wheel, it rotates along with the feed pipe. The abutting wheel then drives the support shaft and the cleaning seat to rotate, and the cleaning seat cleans the material remaining on the feed pipe, ensuring that the material enters the kiln more stably from the feed pipe, thereby improving the stability of feeding from the kiln top.

[0008] Preferably, the cleaning seat has a sliding groove, a cleaning plate is slidably connected in the sliding groove, and a first spring is provided in the sliding groove, one end of the first spring is connected to the bottom of the sliding groove, and the other end is connected to the cleaning plate.

[0009] By adopting the above technical solution, the cleaning plate is supported by the elastic force of the first spring, so that the cleaning plate is more stably abutted against the inner wall of the feed pipe, thereby improving the cleaning effect of the cleaning component on the material.

[0010] Preferably, the kiln is provided with a support, the support is provided with a rope winding machine, the rope winding machine is provided with a pull rope, and the end of the pull rope away from the rope winding machine is provided with a sealing cone for sealing the feed pipe.

[0011] By adopting the above technical solution, the sealing cone seals the feed pipe during kiln operation, reducing the possibility of cold air entering the kiln and preventing carbon dioxide from easily escaping, thus improving the stability of the kiln during operation. When material needs to be conveyed into the kiln, the rope winding machine starts and winds up the rope, which then moves the sealing cone, connecting the feed pipe to the external connection, allowing the material to be conveyed into the kiln.

[0012] Preferably, the bracket is provided with a stabilizing component for stabilizing the pull rope. The stabilizing component includes a stabilizing base, a stabilizing rod, and a stabilizing wheel. The stabilizing base is connected to the bracket and has a stabilizing groove. The stabilizing rod is slidably connected in the stabilizing groove. A second spring is provided in the stabilizing groove. One end of the second spring is connected to the bottom of the stabilizing groove and the other end is connected to the stabilizing rod. The stabilizing wheel is rotatably connected to the end of the stabilizing rod away from the stabilizing base and abuts against the pull rope.

[0013] By adopting the above technical solution, the second spring provides support for the stabilizing rod, allowing the stabilizing wheel to abut against the pull rope more stably. At this time, the stabilizing wheel supports the pull rope, reducing the possibility of swaying during use and thus improving the stability of the sealing cone during operation.

[0014] Preferably, the bracket is provided with a guide frame, the guide frame has a guide hole, and the pull rope is fitted with a guide post, which is slidably connected in the guide hole.

[0015] By adopting the above technical solution, the guide post moves during the movement of the pull rope. The guide post cooperates with the guide hole to further guide the pull rope, making it less likely for the pull rope to shake, thereby further improving the stability of the pull rope and sealing cone during use.

[0016] Preferably, the guide frame is provided with a control component for controlling the rotation of the connecting rod. The control component includes a rack, a first gear, a second gear, and a first synchronous pulley. The rack is mounted on a guide post. The guide frame has a control cavity communicating with a guide hole. The first gear and the second gear are both rotatably connected in the control cavity. The first gear meshes with the rack, and the second gear meshes with the first gear. The first synchronous pulley is connected to the shaft of the second gear. The shaft of the connecting rod is provided with a second synchronous pulley, and a synchronous belt is wound around the second synchronous pulley and the first synchronous pulley.

[0017] By adopting the above technical solution, the guide column moves, driving the rack to move. The rack then drives the first gear to rotate, which in turn drives the second gear to rotate. The second gear then drives the first synchronous pulley to rotate, which in turn drives the synchronous belt to rotate, which in turn drives the second synchronous pulley to rotate. The second synchronous pulley then drives the connecting rod to rotate, which in turn drives the support shaft and the cleaning seat to move, causing the cleaning plate to abut against the inner wall of the feed pipe. At the same time, the abutting wheel also abuts against the inner wall of the feed pipe. At this point, the cleaning plate can clean the inner wall of the feed pipe.

[0018] Preferably, the feed box is provided with a crushing assembly, which includes two crushing rollers arranged opposite each other. The two crushing rollers are rotatably connected in the feed box. The feed box is provided with a first motor. The output end of the first motor is connected to the rotating shaft of one of the crushing rollers. The rotating shafts of the two crushing rollers arranged opposite each other are provided with mating gears, and two adjacent mating gears mesh with each other.

[0019] By adopting the above technical solution, after the material enters the feed box, the first motor starts and drives one of the crushing rollers to rotate. The crushing roller then drives the corresponding mating gear to rotate, which in turn drives the adjacent mating gear to rotate in the opposite direction. The adjacent mating gear then drives the other crushing roller to rotate. At this time, since the two crushing rollers rotate in opposite directions, the adjacent crushing rollers can crush the material as it passes through them, making it less likely for the material to clog during the feeding process, thereby improving the stability of the feed box when conveying materials.

[0020] Preferably, the kiln is provided with a support frame, the support frame is provided with a second motor, the output end of the second motor is provided with a first transmission gear, the outside of the feed pipe is provided with a second transmission gear, and the second transmission gear meshes with the first transmission gear.

[0021] By adopting the above technical solution, during the kiln feeding process, the second motor drives the first transmission gear to rotate, the first transmission gear then drives the second transmission gear to rotate, and the second transmission gear can drive the feed pipe to rotate, so that the feed pipe can transport the material into the kiln more evenly, thus facilitating the feeding of the kiln.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By setting up cleaning components, materials are less likely to remain on the inner wall of the feed pipe, which improves the stability of materials entering the kiln from the feed pipe and reduces the possibility of deviation between the actual amount of materials entering and the set amount of materials entering. By incorporating a stabilizing component, which provides support and guidance for the pull rope, the likelihood of the pull rope swaying during the control of the sealing cone's movement is reduced, thereby improving the stability of the sealing cone during use. By setting up a control component, the position of the cleaning component can be easily controlled. During the process of the sealing cone blocking the feed pipe, the cleaning component is less likely to collide with the sealing cone. After the sealing cone removes the blockage of the feed pipe, the control component can drive the cleaning component to extend to the feed pipe, so that the cleaning component can clean the material remaining in the feed pipe more stably, and the material can enter the kiln more stably. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a structural schematic diagram illustrating the positional relationship between the cleaning component and the feed pipe in an embodiment of this application; Figure 3 yes Figure 2 Enlarged structural diagram of section A in the middle; Figure 4 yes Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 yes Figure 2 Enlarged structural diagram of section C.

[0024] Explanation of reference numerals in the attached drawings: 1. Kiln; 11. Support frame; 111. Second motor; 112. First transmission gear; 12. Bracket; 121. Rope winding machine; 123. Pulling rope; 124. Sealing cone; 13. Guide frame; 131. Guide hole; 132. Guide column; 133. Control chamber; 2. Feed pipe; 21. Second transmission gear; 3. Feed box; 31. First motor; 4. Cleaning assembly; 41. Support; 42. Connecting rod; 421. Second synchronous pulley ; 43. Cleaning seat; 431. Slide groove; 432. Cleaning plate; 433. First spring; 44. Support shaft; 45. Abutment wheel; 5. Crushing assembly; 51. Crushing roller; 52. Matching gear; 6. Stabilizing assembly; 61. Stabilizing seat; 611. Stabilizing groove; 612. Second spring; 62. Stabilizing rod; 63. Stabilizing wheel; 7. Control assembly; 71. Rack; 72. First gear; 73. Second gear; 74. First synchronous pulley; 75. Synchronous belt. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0026] This application discloses a kiln roof structure for a calcium carbonate calcining kiln. (Refer to...) Figure 1 and Figure 2 A kiln roof structure for a calcium carbonate calcining kiln is provided, mounted on a kiln 1, including a feed pipe 2 and a feed box 3. The feed pipe 2 is rotatably connected to the kiln 1, and the feed box 3 is mounted on the kiln 1. The discharge end of the feed box 3 is positioned opposite to the feed pipe 2, and a cleaning assembly 4 for cleaning the feed pipe 2 is provided on the kiln 1. The cleaning assembly 4 cleans the material remaining on the inner wall of the feed pipe 2, so that the material enters the kiln 1 more stably from the feed pipe 2, reducing the possibility of deviation between the actual amount of material entering and the set amount.

[0027] Reference Figure 1 To reduce the possibility of material blockage at the feed pipe 2, a crushing assembly 5 is provided in the feed box 3. The crushing assembly 5 includes two crushing rollers 51 arranged opposite each other, both of which are rotatably connected in the feed box 3. A first motor 31 is fixed on the feed box 3, and the output end of the first motor 31 is connected to the rotating shaft of one of the crushing rollers 51. Each of the rotating shafts of the two crushing rollers 51 is provided with a meshing gear 52, and adjacent meshing gears 52 engage with each other.

[0028] After the material is conveyed to the feed hopper 3, the first motor 31 starts and drives the corresponding crushing roller 51 to rotate. The crushing roller then drives the corresponding mating gear 52 to rotate, and the mating gear 52 drives the adjacent mating gear 52 to rotate, so that the two mating gears 52 rotate in opposite directions. The two mating gears 52 simultaneously drive the corresponding crushing roller 51 to rotate, so that the two adjacent crushing rollers 51 rotate in opposite directions. At this time, the crushing roller 51 can crush the material, reducing the possibility of the material being too large and clogging the feed pipe 2.

[0029] Reference Figure 1 To facilitate control of the feed pipe 2, a support frame 11 is fixed on the kiln 1, and a second motor 111 is fixed on the support frame 11. A first transmission gear 112 is fixed on the output end of the second motor 111. A second transmission gear 21 is provided on the outside of the feed pipe 2, and the second transmission gear 21 meshes with the first transmission gear 112.

[0030] After the material in the feed box 3 enters the feed pipe 2, the second motor 111 starts and drives the first transmission gear 112 to rotate. The first transmission gear 112 then drives the second transmission gear 21 to rotate. The second transmission gear 21 then drives the feed pipe 2 to rotate. The feed pipe 2 is located at one end of the kiln 1 with a feed plate at an incline. At this time, the rotating feed pipe 2 and the feed plate can stably distribute the material in the kiln 1, improving the uniformity of the material in the kiln 1, so that the kiln 1 can process the material more stably.

[0031] Reference Figure 2 and Figure 3 The cleaning assembly 4 includes a support 41, a connecting rod 42, and a cleaning seat 43. The support 41 is fixed to the kiln 1, and the connecting rod 42 is rotatably connected to the support 41. A support shaft 44 is rotatably connected to the connecting rod 42, and the cleaning seat 43 is mounted on the support shaft 44. An abutment wheel 45 is mounted on the support shaft 44, and the abutment wheel 45 abuts against the inner wall of the feed pipe 2.

[0032] During the rotation of the feed pipe 2, the abutment wheel 45 abuts against the inner wall of the feed pipe 2. At this time, under the action of friction between the abutment wheel 45 and the inner wall of the feed pipe 2, the rotation of the feed pipe 2 drives the abutment wheel 45 to rotate. The abutment wheel 45 then drives the support shaft 44 to rotate, and the support shaft 44 then drives the cleaning seat 43 to rotate. The cleaning seat 43 agitates the material on the inner wall of the feed pipe 2 so that the material enters the kiln 1 more stably from the feed pipe 2.

[0033] Reference Figure 3To improve the stability of the cleaning seat 43 during use, a sliding groove 431 is provided on the cleaning seat 43, and a cleaning plate 432 is slidably connected in the sliding groove 431. Several first springs 433 are provided in the sliding groove 431, one end of each first spring 433 is connected to the bottom of the sliding groove 431, and the other end is connected to the cleaning plate 432.

[0034] During the rotation of the cleaning seat 43, the cleaning plate 432 is driven to rotate, which in turn moves the material on the inner wall of the feed pipe 2, allowing the material to enter the kiln 1 from the feed pipe 2. Furthermore, under the elastic force of the first spring 433, the cleaning plate 432 is stably pressed against the inner wall of the feed pipe 2, improving the cleaning effect of the cleaning plate 432 on the material and further facilitating the stable entry of the material into the kiln 1.

[0035] Reference Figure 2 A support frame 12 is fixed on the kiln 1, and a rope winding machine 121 is fixed on the support frame 12. A pull rope 123 is wound on the rope winding machine 121, and a sealing cone 124 for sealing the feed pipe 2 is connected to the end of the pull rope 123 away from the rope winding machine 121.

[0036] During the operation of the kiln 1, the sealing cone 124 abuts against the inner wall of the feed pipe 2 to seal the feed pipe 2. When it is necessary to transport materials into the kiln 1, the rope winding machine 121 starts and winds up the pull rope 123. The pull rope 123 drives the sealing cone 124 to move away from the feed pipe 2, so that the sealing cone 124 releases the seal on the feed pipe 2, and the material can then enter the kiln 1 from the feed pipe 2.

[0037] Reference Figure 3 and Figure 4 To improve the stability of the pull rope 123 during winding, a stabilizing component 6 is provided on the bracket 12 for stable lifting. The stabilizing component 6 includes a stabilizing base 61, a stabilizing rod 62, and a stabilizing wheel 63. The stabilizing base 61 is fixed to the bracket 12 and has a stabilizing groove 611. The stabilizing rod 62 is slidably connected in the stabilizing groove 611. A second spring 612 is provided in the stabilizing groove 611, with one end connected to the bottom of the groove and the other end connected to the stabilizing rod 62. The stabilizing wheel 63 is rotatably connected to the end of the stabilizing rod 62 away from the stabilizing base 61 and abuts against the pull rope 123.

[0038] During the use of the pull rope 123, the stabilizing wheel 63 abuts against the pull rope 123, providing guidance and limiting for the pull rope 123, making it less likely for the pull rope 123 to sway during movement. At the same time, under the elastic force of the first spring 433, the guiding and limiting capabilities of the stabilizing rod 62 and the stabilizing wheel 63 for the pull rope 123 are improved, further reducing the possibility of the pull rope 123 and the sealing cone 124 swaying during use.

[0039] Reference Figure 3 and Figure 5 A guide frame 13 is fixed on the bracket 12, and a guide hole 131 is provided on the guide frame 13. A guide post 132 is slidably connected in the guide hole 131, and the guide post 132 is sleeved on the outside of the pull rope 123. During the movement of the pull rope 123, the guide post 132 cooperates with the guide hole 131 to further guide the pull rope 123, further reducing the possibility of shaking of the pull rope 123 and the sealing cone 124 during use, thereby further improving the stability of the pull rope 123 and the sealing cone 124 during use.

[0040] Reference Figure 3 and Figure 5 To reduce the possibility of interference between the cleaning component 4 and the sealing cone 124, a control component 7 for controlling the rotation of the connecting rod 42 is provided on the guide frame 13.

[0041] The control assembly 7 includes a rack 71, a first gear 72, a second gear 73, and a first synchronizing pulley 74. The rack 71 is fixed to the guide post 132. The guide frame 13 has a control cavity 133 that communicates with the guide hole 131. The first gear 72 and the second gear 73 are both rotatably connected in the control cavity 133. The first gear 72 meshes with the rack 71, and the second gear 73 meshes with the first gear 72.

[0042] The first synchronous pulley 74 is connected to the shaft of the second gear 73, and the shaft of the connecting rod 42 is provided with a second synchronous pulley 421. A synchronous belt 75 is wound around the second synchronous pulley 421 and the first synchronous pulley 74. Both the first synchronous pulley 74 and the second synchronous pulley 421 are configured as synchronous belt pulleys, and the synchronous belt 75 is configured as a synchronous toothed belt.

[0043] During the movement of the guide column 132, the rack 71 moves, which in turn drives the first gear 72 to rotate, which in turn drives the second gear 73 to rotate. The second gear 73 then drives the first synchronous pulley 74 to rotate, which in turn drives the synchronous belt 75 to rotate, which in turn drives the second synchronous pulley 421 to rotate. The second synchronous pulley 421 then drives the connecting rod 42 to rotate, which in turn drives the support shaft 44 and the cleaning seat 43 to move, so that the cleaning plate 432 abuts against the inner wall of the feed pipe 2, and at the same time, the abutting wheel 45 abuts against the inner wall of the feed pipe 2. At this time, the cleaning plate 432 can clean the inner wall of the feed pipe 2. At this time, under the action of the control component 7, the sealing cone 124 is less likely to come into contact with the cleaning component 4 during its movement, and the cleaning component 4 is less likely to interfere with the sealing cone 124, thus improving the stability of the sealing cone 124 and the cleaning component 4 during use.

[0044] The implementation principle of the kiln roof structure for calcium carbonate calcining kiln in this application embodiment is as follows: During the use of the kiln 1, the cleaning component 4 cleans the material that may remain on the inner wall of the feed pipe 2, so that the material enters the kiln 1 more stably from the feed pipe 2, reducing the possibility of material residue at the feed pipe 2, making it less likely that the actual amount of material entering will deviate from the set amount of material entering, and providing convenience for the kiln 1 to process materials more stably.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A kiln roof structure for a calcium carbonate calcining kiln, disposed on the top of a kiln (1), characterized in that: It includes a feed pipe (2) and a feed box (3). The feed pipe (2) is rotatably connected to the kiln (1). The feed box (3) is mounted on the kiln (1). The discharge end of the feed box (3) is opposite to the feed pipe (2). The kiln (1) is equipped with a cleaning assembly (4), which includes a support (41), a connecting rod (42), and a cleaning seat (43). The support (41) is mounted on the kiln (1), the connecting rod (42) is rotatably connected to the support (41), and a support shaft (44) is rotatably connected to the connecting rod (42). The cleaning seat (43) is mounted on the support shaft (44), and an abutting wheel (45) is mounted on the support shaft (44). The abutting wheel (45) abuts against the inner wall of the feed pipe (2).

2. The kiln roof structure for a calcium carbonate calcining kiln according to claim 1, characterized in that: The cleaning seat (43) is provided with a sliding groove (431), and a cleaning plate (432) is slidably connected in the sliding groove (431). A first spring (433) is provided in the sliding groove (431), one end of the first spring (433) is connected to the bottom of the sliding groove (431), and the other end is connected to the cleaning plate (432).

3. The kiln roof structure for a calcium carbonate calcining kiln according to claim 1, characterized in that: The kiln (1) is provided with a support (12), the support (12) is provided with a rope winding machine (121), the rope winding machine (121) is provided with a pull rope (123), and the end of the pull rope (123) away from the rope winding machine (121) is provided with a sealing cone (124) for sealing the feed pipe (2).

4. The kiln roof structure for a calcium carbonate calcining kiln according to claim 3, characterized in that: The bracket (12) is provided with a stabilizing component (6) for stabilizing the pull rope (123). The stabilizing component (6) includes a stabilizing base (61), a stabilizing rod (62), and a stabilizing wheel (63). The stabilizing base (61) is connected to the bracket (12). A stabilizing groove (611) is provided on the stabilizing base (61). The stabilizing rod (62) is slidably connected in the stabilizing groove (611). A second spring (612) is provided in the stabilizing groove (611). One end of the second spring (612) is connected to the bottom of the stabilizing groove (611), and the other end is connected to the stabilizing rod (62). The stabilizing wheel (63) is rotatably connected to the end of the stabilizing rod (62) away from the stabilizing base (61). The stabilizing wheel (63) abuts against the pull rope (123).

5. The kiln roof structure for a calcium carbonate calcining kiln according to claim 3, characterized in that: The bracket (12) is provided with a guide frame (13), the guide frame (13) is provided with a guide hole (131), the pull rope (123) is provided with a guide post (132), and the guide post (132) is slidably connected in the guide hole (131).

6. The kiln roof structure for a calcium carbonate calcining kiln according to claim 5, characterized in that: The guide frame (13) is provided with a control component (7) for controlling the rotation of the connecting rod (42). The control component (7) includes a rack (71), a first gear (72), a second gear (73), and a first synchronous pulley (74). The rack (71) is set on the guide post (132). The guide frame (13) is provided with a control cavity (133) that communicates with the guide hole (131). The first gear (72) and the second gear (73) are rotatably connected in the control cavity (133). The first gear (72) meshes with the rack (71), and the second gear (73) meshes with the first gear (72). The first synchronous pulley (74) is connected to the shaft of the second gear (73). The shaft of the connecting rod (42) is provided with a second synchronous pulley (421). A synchronous belt (75) is wound around the second synchronous pulley (421) and the first synchronous pulley (74).

7. The kiln roof structure for a calcium carbonate calcining kiln according to claim 1, characterized in that: The feed box (3) is provided with a crushing assembly (5), which includes two crushing rollers (51) arranged opposite to each other. The two crushing rollers (51) are rotatably connected in the feed box (3). The feed box (3) is provided with a first motor (31). The output end of the first motor (31) is connected to the rotating shaft of one of the crushing rollers (51). The rotating shafts of the two crushing rollers (51) arranged opposite to each other are provided with a mating gear (52). The two adjacent mating gears (52) mesh with each other.

8. The kiln roof structure for a calcium carbonate calcining kiln according to claim 1, characterized in that: The kiln (1) is provided with a support frame (11), and the support frame (11) is provided with a second motor (111). The output end of the second motor (111) is provided with a first transmission gear (112). The outside of the feed pipe (2) is provided with a second transmission gear (21), and the second transmission gear (21) meshes with the first transmission gear (112).

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