Vertical drum mill and maintenance method for reduction gear

Abstract

The vertical roller grinding mill comprises a rotary table, a plurality of grinding rollers, a plurality of roller assemblies and a plurality of supporting frame parts. The rotary table is arranged in a rotatable mode. And the plurality of roller assemblies are respectively provided with a plurality of crushing rollers. The plurality of bracket portions arranged around the turntable include a first bracket portion. The first bracket portion supports the plurality of drum assemblies, and the plurality of drum assemblies are disposed adjacent to each other in the circumferential direction of the turntable. The first bracket part is provided with a plurality of bracket foot parts and a beam part. The strut legs are provided so as to extend in the vertical direction, and are arranged in pairs in the circumferential direction of the turntable. And the beam part is connected with the upper parts of the bracket foot parts in the circumferential direction of the rotary table. The first bracket portion is configured in a door shape by the bracket foot portion and the beam portion.

Description

Technical Field

[0001] The present disclosure relates to a vertical drum crusher. Background Art

[0002] Conventionally, there is known a vertical drum crusher for crushing an object to be crushed. Patent Document 1 discloses such a vertical drum crusher.

[0003] The drum crusher of Patent Document 1 comprises a turntable, a plurality of crushing drums, and a support frame. The turntable is arranged above a reduction gear. The turntable is rotationally driven by a rotation drive unit connected via the reduction gear. The plurality of crushing drums are arranged around the turntable. The plurality of crushing drums are respectively pressed against the turntable by a pressing drive unit. The drum crusher crushes the object by biting it between the turntable and the plurality of crushing drums.

[0004] The support frame is used to support the turntable and the plurality of crushing rollers. Specifically, the support frame has an arm support portion and a pressing drive device support portion. The pressing drive device support portion is used to support the turntable and the pressing drive portion. The pressing drive device support portion is arranged in a manner of surrounding the reduction device arranged below the turntable from the outside. An arm support portion is arranged on the pressing drive device support portion. A plurality of arm support portions are arranged in a manner corresponding to the plurality of crushing rollers respectively. A corresponding crushing roller is arranged on each arm support portion.

[0005] [Prior art literature]

[0006] [Patent Document]

[0007] Patent Document 1: Japanese Patent No. 5809708 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] In the structure of Patent Document 1, the support part includes an arm support part and a pressing drive device support part, and is configured to have a plurality of steps in the vertical direction in order to support the turntable and the plurality of grinding drums. Therefore, the structure of the support part is complicated.

[0010] In view of the above-mentioned situation, the present disclosure aims to realize a simple structure of a vertical drum crusher.

[0011] Technical solutions used to solve the problem

[0012] The problem to be solved by the present disclosure is as described above. The means for solving the problem and their effects are described below.

[0013] According to a first aspect of the present disclosure, a vertical roller crusher of the following structure is provided. That is, the vertical roller crusher includes a turntable, a plurality of crushing rollers, a plurality of roller assemblies, and a plurality of support parts. The turntable is arranged in a rotatable manner. The crushing roller is pressed on the crushing object on the turntable and can crush the crushing object. The roller assemblies are respectively provided with the plurality of crushing rollers. The support part is arranged around the turntable for supporting the roller assembly. The support part includes a first support part. The first support part supports a plurality of the roller assemblies, and the plurality of the roller assemblies are arranged adjacent to each other in the circumferential direction of the turntable. The first support part has a plurality of support legs and a beam part. The support legs are arranged in a manner extending in the up-down direction and are arranged in pairs in the circumferential direction of the turntable. The beam part connects the upper parts of the support legs to each other in the circumferential direction of the turntable. The first support part is formed into a gate shape by the support legs and the beam part.

[0014] Thus, the plurality of bracket portions are formed in a gate shape, so that the bracket portions can have a simple structure.

[0015] According to a second aspect of the present disclosure, a maintenance method for a speed reducer is provided. That is, the maintenance method for the speed reducer is applied to a vertical drum crusher, which includes a turntable, a plurality of crushing drums, a plurality of drum assemblies, a plurality of support parts, and a speed reducer. The turntable is arranged in a rotatable manner. The crushing drum is pressed on a crushing object on the turntable and can crush the crushing object. The plurality of crushing drums are respectively arranged on the drum assemblies. The support part is arranged around the turntable to support the drum assemblies. The speed reducer reduces the rotation input from the driving source and transmits it to the turntable. The support part includes a first support part. The first support part supports a plurality of drum assemblies, and the plurality of drum assemblies are arranged adjacent to each other in the circumferential direction of the turntable. The first support part has a plurality of support legs and a beam part. The support legs are arranged in a manner extending in the up-down direction and are arranged in pairs in the circumferential direction of the turntable. The beam part connects the upper parts of the support legs to each other in the circumferential direction of the turntable. The first support part is formed into a gate shape by the support leg part and the beam part. The maintenance method includes the step of moving the reduction gear through the internal space of the first support part to the outside of the vertical drum crusher.

[0016] Invention effect

[0017] According to the present disclosure, a simple structure of a vertical drum crusher can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view showing the overall structure of a vertical drum crusher according to one embodiment of the present disclosure;

[0019] Figure 2 is a perspective view showing the lower portion of a vertical drum crusher; and

[0020] Figure 3 This is a perspective view showing a state where the reduction gear is removed from the lower part of the vertical drum crusher for maintenance. DETAILED DESCRIPTION

[0021] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Figure 1 1 is a cross-sectional view showing the overall structure of a vertical drum crusher 1 according to an embodiment of the present disclosure.

[0022] Figure 1 The vertical roller crusher 1 shown is fixed to an installation surface 50 such as a floor of a factory. The vertical roller crusher 1 can crush an object fed thereto. Examples of the object to be crushed include cement, slag, coal, etc., but are not limited thereto.

[0023] The vertical drum crusher 1 includes a housing 11 , a turntable 12 , a speed reduction device 13 , a plurality of crushing drums 14 , a plurality of drum assemblies 15 , a plurality of pressing driving parts 16 , a plurality of support parts 20 and a screening device 17 .

[0024] The housing 11 is formed in a hollow shape. The turntable 12 and the grinding drum 14 are arranged inside the housing 11 .

[0025] The turntable 12 is supported so as to be rotatable about a rotation axis extending in the vertical direction. The rotation axis can be basically regarded as the center of the vertical drum crusher 1. The plurality of bracket parts 20 are arranged so as to surround the turntable 12 in a plan view.

[0026] The turntable 12 is rotated by a motor 31 as a driving source. The motor 31 is disposed at a position slightly away from the center of the vertical drum crusher 1 and is fixed to the mounting surface 50 .

[0027] The reduction gear 13 is disposed below the turntable 12 and fixed to the mounting surface 50. The reduction gear 13 can be configured as a planetary gear device, for example, but is not limited thereto.

[0028] The input shaft of the reduction gear 13 is connected to the output shaft of the motor 31 via the transmission shaft 32. The turntable 12 is attached to the output side of the reduction gear 13.

[0029] In this configuration, the rotation of the output shaft of the motor 31 is transmitted to the speed reduction device 13 via the transmission shaft 32. The speed reduction device 13 reduces the speed of the input rotation and transmits it to the turntable 12. As a result, the turntable 12 rotates.

[0030] A cylindrical input guide 33 is provided above the turntable 12. The input guide 33 can guide the pulverized object onto the turntable 12. The input guide 33 is arranged obliquely so as to penetrate the housing 11.

[0031] The turntable 12 is formed in a circular shape in a plan view. The turntable 12 can receive the pulverized object dropped by the input guide 33 on its upper surface. A plurality of pulverizing drums 14 are arranged around the turntable 12.

[0032] The plurality of pulverizing rollers 14 are arranged so as to be placed on the peripheral edge of the upper surface of the turntable 12. The plurality of pulverizing rollers 14 are arranged in a row along the circumferential direction of the turntable 12. In the present embodiment, the six pulverizing rollers 14 are arranged at equal angular intervals, but they may also be arranged at unequal intervals. In the following, the circumferential direction of the turntable 12 is sometimes referred to as the circumferential direction.

[0033] Each pulverizing roller 14 can be moved closer to or farther from the peripheral edge of the upper surface of the turntable 12 by the roller assembly 15 and the pressing drive unit 16. Each pulverizing roller 14 presses against the pulverization object on the turntable 12 to pulverize the pulverization object.

[0034] A plurality of roller assemblies 15 are provided around the turntable 12 in a manner corresponding to the plurality of pulverizing rollers 14 , respectively. Each of the plurality of roller assemblies 15 is used to support the pulverizing roller 14 .

[0035] Each roller assembly 15 includes a first arm 51 and a second arm 52. The grinding roller 14 is mounted on one end of the first arm 51. The other end of the first arm 51 is connected to one end of the second arm 52.

[0036] The first arm 51 is provided so as to extend in the radial direction of the turntable 12 in a plan view. The first arm 51 is supported by the support part 20 via a horizontal axis and is rotatable relative to the support part 20.

[0037] The first arm 51 is disposed so as to penetrate the housing 11. Inside the housing 11, the grinding drum 14 is rotatably supported at the front end of the first arm 51.

[0038] The second arm 52 is provided so as to extend in the up-down direction. A longitudinal middle portion of the second arm 52 is supported by the corresponding bracket portion 20 so as to be rotatable around a horizontal axis.

[0039] The second arm 52 is located near the outer side of the housing 11. The second arm 52 is disposed near the end portion of the bracket portion 20 close to the housing 11. The first arm 51 is connected to the upper end portion of the second arm 52 outside the housing 11.

[0040] The pressing driving unit 16 is provided in each of the plurality of roller assemblies 15. The pressing driving unit 16 is disposed below the roller assembly 15. Each of the pressing driving units 16 can press the grinding roller 14 onto the turntable 12 via the roller assembly 15.

[0041] In the present embodiment, the pressing drive unit 16 is a hydraulic cylinder device. One end of the hydraulic cylinder is connected to the lower end of the second arm 52, and the other end is connected to the mounting surface 50. By extending and retracting the hydraulic cylinder, the grinding drum 14 can be moved closer to or away from the turntable 12. However, the structure of the pressing drive unit 16 is not limited to the hydraulic cylinder.

[0042] The pressing drive unit 16 can strongly press the grinding drum 14 against the turntable 12. The grinding target object supplied to the turntable 12 is ground between the grinding drum 14 and the turntable 12.

[0043] A hot air supply port 35 is provided at the lower portion of the housing 11. An appropriate hot air supply source is connected to the hot air supply port 35 via a duct (not shown). The hot air supplied into the housing 11 from the hot air supply port 35 blows up the crushed material crushed by the turntable 12.

[0044] The screening device 17 is disposed above the turntable 12. The screening device 17 can screen the pulverized material blown by the hot air.

[0045] The screening device 17 includes a partition plate 41 and a return guide 42 .

[0046] The partition plate 41 is disposed above the turntable 12 in the housing 11. The partition plate 41 is driven by a partition plate driving device 43 (eg, a motor).

[0047] The return guide 42 is disposed between the turntable 12 and the partition plate 41 in the up-down direction. The return guide 42 is formed in a funnel shape, with the lower opening facing the turntable 12 and the upper opening facing the partition plate 41.

[0048] The fine powder discharge conduit 44 is provided at the upper part of the housing 11. The partition plate 41 discharges the fine powder finer than the predetermined particle size (particle diameter) among the transferred pulverized materials from the fine powder discharge conduit 44. The remaining pulverized materials are returned to the turntable 12 via the return guide 42 and pulverized again by the pulverizing drum 14.

[0049] A plurality of support parts 20 are provided around the turntable 12 (outside the housing 11) at positions corresponding to the respective pulverizing rollers 14. One or two roller assemblies 15 are supported on each of the plurality of support parts 20.

[0050] Secondly, refer to Figure 2 The plurality of bracket parts 20 will be described in detail. Figure 2 1 is a perspective view showing the lower part of the vertical drum crusher 1. Figure 2In the figure, the housing 11, the input guide 33, the return guide 42, etc. are omitted.

[0051] The bracket parts 20 are arranged at appropriate intervals in the circumferential direction so as to surround the turntable 12 and the reduction gear 13 in a plan view. The plurality of bracket parts 20 are each made of concrete with steel bars embedded as a reinforcing material.

[0052] The vertical drum crusher 1 of this embodiment includes five support parts 20. In order to identify each support part 20, it may be sometimes referred to as a first support part 21, a second support part 22, a third support part 23, a fourth support part 24, and a fifth support part 25.

[0053] The second bracket portion 22 , the third bracket portion 23 , the fourth bracket portion 24 , and the fifth bracket portion 25 all have the same structure, and therefore the fifth bracket portion 25 will be described as a representative example.

[0054] like Figure 2 As shown in FIG. 1 , the fifth bracket portion 25 is formed substantially in an isosceles triangle shape in a plan view. The fifth bracket portion 25 supports one drum assembly 15 .

[0055] The fifth bracket portion 25 includes two bracket legs 71 and one beam portion 72. The bracket legs 71 and the beam portion 72 are integrally formed.

[0056] The bracket leg portions 71 are arranged in a pair at a distance from each other in the circumferential direction. The beam portion 72 is provided so as to connect the upper end portions of the pair of bracket leg portions 71 in the circumferential direction.

[0057] The pressing drive unit 16 is disposed below the beam 72 and between the support legs 71 .

[0058] A recessed portion 73 is formed on the side of the beam portion 72 close to the turntable 12. Inside the recessed portion 73, the second arm 52 included in the drum assembly 15 is arranged.

[0059] As described above, the fifth bracket portion 25 includes a pair of bracket legs 71 and a beam portion 72 that connects the upper portions of the pair of bracket legs 71. Thus, the fifth bracket portion 25 is configured in a gate shape.

[0060] The first bracket portion 21 is basically equivalent to an integral structure of two fifth bracket portions 25. The first bracket portion 21 supports two drum assemblies 15 adjacent to each other in the circumferential direction.

[0061] The first bracket portion 21 includes two bracket legs 71 and one beam portion 74. The bracket legs 71 and the beam portion 74 are integrally formed.

[0062] The bracket legs 71 are arranged in pairs at intervals in the circumferential direction of the housing 11. The beam 74 is provided to connect the upper ends of the pair of bracket legs 71. The beam 74 is formed in a shape curved along the outer peripheral surface of the turntable 12.

[0063] Two pressing drive units 16 are disposed below the beam 74 and between the support legs 71. A transmission shaft 32 is disposed between the two pressing drive units 16, and the transmission shaft 32 is used to transmit the driving force to the speed reducer 13.

[0064] Two recessed portions 73 are formed on the side of the beam portion 74 close to the turntable 12. In each recessed portion 73, the second arm 52 of the roller assembly 15 is disposed.

[0065] In the first frame portion 21, two roller assemblies 15 are located between two frame legs 71. In the second frame portion 22, the third frame portion 23, the fourth frame portion 24, and the fifth frame portion 25, one roller assembly 15 is located between two frame legs 71. Thus, the frame legs 71 and the roller assemblies 15 are arranged in different phases from each other in a plan view.

[0066] Next, the first bracket portion 21 will be described in detail.

[0067] As described above, the size of the first bracket portion 21 is substantially equal to the size of the two other bracket portions in the circumferential direction of the turntable 12. On the other hand, the number of bracket legs 71 is the same in the first bracket portion 21 and the other bracket portions. Thus, by using the first bracket portion 21, the two bracket legs 71 can be basically omitted.

[0068] The support legs 71 of the first support part 21 are arranged only at two positions at both ends in the circumferential direction, and no support legs are provided at the middle position in the circumferential direction. The two roller assemblies 15 are arranged between the support legs 71 at both ends of the first support part 21 in the circumferential direction.

[0069] In the case of considering the bisection point P1 of the circumferential length of the first support portion 21, two roller assemblies 15 are arranged between the support leg 71 closest to one circumferential side from the bisection point P1 and the support leg 71 closest to the other circumferential side from the bisection point P1 in a plan view. In other words, a beam 72 is provided between the support leg 71 closest to one circumferential side from the bisection point P1 and the support leg 71 closest to the other circumferential side, and the two roller assemblies 15 are fixed to the shared beam 72. No support leg is arranged in the circumferential middle portion of the beam 72.

[0070] In a plan view, one of the two roller assemblies 15 is disposed between the bisection point P1 and the support leg 71 closest to one circumferential side of the bisection point P1. The remaining roller assembly 15 is disposed between the bisection point P1 and the support leg 71 closest to the other circumferential side of the bisection point P1.

[0071] The beam portion 74 of the first bracket portion 21 is longer in the circumferential direction than the beam portion 72 of the other bracket portions. Therefore, the circumferential dimension L1 of the internal space of the gate-shaped first bracket portion 21 (the space between the bracket legs 71) is also longer than the circumferential dimension L2 of the internal space of the other bracket portions (L1>L2).

[0072] Thus, in the first support portion 21, a sufficient space can be ensured between the support legs 71. In the present embodiment, this space is used as a space for arranging the transmission shaft 32 and the motor 31. As a result, a vertical drum crusher 1 that is compact as a whole can be realized.

[0073] In this embodiment, the circumferential dimension L1 of the inner space of the first bracket portion 21 is slightly larger than Figure 3 The size L3 (L1>L3) of the reduction gear 13 is shown. Therefore, the reduction gear 13 can be moved as long as the pressing drive unit 16, the motor 31, the transmission shaft 32, etc. arranged on the first support part 21 are removed and moved to another place. Figure 3 The two support legs 71 are arranged across the passage of the reduction gear 13. As a result, the reduction gear 13 can be removed from the vertical drum crusher 1 through the space below the beam 72 without lifting it, thereby achieving efficient maintenance work.

[0074] Thus, in the vertical drum crusher 1 of the present embodiment, the reduction gear 13 can be moved to the outside of the first bracket portion 21 so as to pass through the gate-shaped first bracket portion 21 .

[0075] In the structure of Patent Document 1, in order to move the reducer 13 out of the turntable without interfering with the support part, the reducer 13 is arranged at a position significantly lower than the turntable. In this embodiment, a space for a path for moving the reducer 13 to the outside can be ensured inside the gate-shaped first support part 21. Thus, a simple-shaped support part 20 can be realized, and the connection structure between the reducer 13 and the turntable 12 can also be simplified.

[0076] As described above, the vertical drum crusher 1 of the present embodiment includes a turntable 12, a plurality of crushing drums 14, a plurality of drum assemblies 15, and a plurality of support parts 20. The turntable 12 is arranged in a rotatable manner. The crushing drum 14 is pressed on the crushing object on the turntable 12 to crush the crushing object. The drum assemblies 15 are respectively provided with a plurality of crushing drums 14. The support part 20 is arranged around the turntable 12 to support the drum assemblies 15. The support part 20 includes a first support part 21. The first support part 21 supports a plurality of drum assemblies 15, and the plurality of drum assemblies 15 are arranged adjacent to each other in the circumferential direction of the turntable 12. The first support part 21 has a plurality of support legs 71 and a beam part 74. The support legs 71 are arranged in a manner extending in the up-down direction and are arranged in pairs in the circumferential direction of the turntable 12. The beam part 74 connects the upper parts of the support legs 71 in the circumferential direction of the turntable 12. The first bracket portion 21 is formed into a gate shape by the bracket leg portions 71 and the beam portions 74 .

[0077] Thus, since a plurality of drum assemblies 15 can be supported by one first support portion 21, the support portion 20 can be constructed simply as a whole. In addition, since the internal space of the gate-shaped first support portion 21 can be sufficiently ensured, it can be easily and flexibly used to store various components.

[0078] In the vertical roller crusher 1 of the present embodiment, a plurality of roller assemblies 15 are arranged between the frame leg 71 closest to one circumferential side from the bisection point P1 which divides the circumferential length of the first frame portion 21 equally and the frame leg 71 closest to the other circumferential side from the bisection point P1.

[0079] Thus, a wide internal space can be ensured in the circumferential center portion of the first stay portion 21 .

[0080] Furthermore, in the vertical drum crusher 1 of the present embodiment, the first support portion 21 supports the two drum assemblies 15 .

[0081] This makes it possible to realize a simple structure of the first stay portion 21 .

[0082] The vertical drum crusher 1 of this embodiment includes a speed reducer 13 for reducing the speed of rotation input from the driving source and transmitting the rotation to the turntable 12. The dimension L1 between the bracket legs 71 of the first bracket part 21 is larger than the dimension L3 of the speed reducer 13.

[0083] Thus, the reduction gear 13 can be moved to the outside of the vertical drum crusher 1 by passing through the internal space of the first bracket portion 21. Thus, the reduction gear 13 can be easily maintained.

[0084] Moreover, in the vertical drum crusher 1 of this embodiment, the first support part 21 is made of a material including concrete.

[0085] Thus, it is possible to suppress vibration and impact generated when the objects to be crushed are bitten between the plurality of crushing rollers 14 and the turntable 12 and crushed. In addition, in the support part 20 made of concrete, the support leg part 71 is generally formed in a thick columnar shape. Therefore, if a structure is provided to support a plurality of roller assemblies 15 like the first support part 21, a larger space can be created by omitting the support leg part 71, which is quite beneficial.

[0086] In addition, in the vertical roller crusher 1 of this embodiment, six roller assemblies 15 are provided.

[0087] When a plurality of roller assemblies 15 are arranged, the circumferential intervals of the plurality of roller assemblies 15 become smaller. In this case, in order to simplify the structure of the bracket 20, it is preferable to use a structure in which a plurality of roller assemblies 15 are supported by one bracket like the first bracket 21.

[0088] In the vertical roller crusher 1 of the present embodiment, maintenance of the reduction gear 13 includes a step of moving the reduction gear 13 out of the vertical roller crusher 1 through the internal space of the first bracket portion 21 .

[0089] This makes it easier to maintain the reduction gear device 13 .

[0090] The preferred embodiments of the present disclosure have been described above, but the above-described configurations can be modified, for example, as follows.

[0091] In the above embodiment, the number of the plurality of pulverizing rollers 14 (in other words, the number of roller assemblies 15 ) is set to 6, but the present invention is not limited thereto. The number of pulverizing rollers 14 may be 2 or more.

[0092] In the above embodiment, the plurality of bracket parts 20 are made of concrete, but may be made of steel, for example, instead.

[0093] In the above-described embodiment, the first bracket portion 21 is used to support two roller assemblies 15 adjacent to each other in the circumferential direction of the turntable 12 , but the first bracket portion 21 may support more than two roller assemblies 15 .

[0094] In the above embodiment, the number of the bracket legs 71 of the first bracket portion 21 is 2, but the present invention is not limited thereto and may be 4. However, all the bracket legs 71 are preferably disposed at the ends of the first bracket portion 21 in the circumferential direction.

[0095] The structures of the second bracket portion 22 , the third bracket portion 23 , the fourth bracket portion 24 , and the fifth bracket portion 25 may be arbitrarily selected.

[0096] For example, the upper portion of the third bracket portion 23 and the upper portion of the fourth bracket portion 24 may be connected to form an integral structure. Figure 3 The vertical drum crusher 1 may further include a circulation path for discharging coarse particles of the crushed objects and guiding them to the input guide 33. The discharge conveyor constituting the circulation path may be arranged below the connection part 80.

[0097] For example, the second bracket portion 22 and the third bracket portion 23 may be omitted, and bracket portions similar to the first bracket portion 21 may be arranged instead. The same applies to the fourth bracket portion 24 and the fifth bracket portion 25.

[0098] Considering the difference in span length between the beam portions 74 and 72 , the thickness of the beam portion 74 in the first bracket portion 21 can be set larger than the thickness of the beam portion 72 in the other bracket portions.

[0099] Based on the above teachings, it is obvious that the present disclosure can take many changes and modifications. Therefore, it should be understood that the present disclosure can be implemented in ways other than those described in this specification within the scope of the appended claims.

[0100] According to the disclosure, at least the following technical ideas can be grasped.

[0101] (Item 1) A vertical drum crusher comprising:

[0102] a turntable arranged in a rotatable manner;

[0103] a plurality of crushing rollers, which are pressed on the crushing object on the turntable to crush the crushing object;

[0104] a plurality of roller assemblies, each of which is provided with the pulverizing roller; and

[0105] A plurality of support parts are arranged around the turntable and used to support the roller assembly.

[0106] The support part includes a first support part supporting a plurality of the roller assemblies, and the plurality of the roller assemblies are adjacently arranged in the circumferential direction of the turntable.

[0107] The first support portion comprises:

[0108] a plurality of support legs which are provided so as to extend in the up-down direction and are arranged in pairs in the circumferential direction of the turntable; and

[0109] a beam portion connecting the upper portions of the support legs to each other in the circumferential direction of the turntable,

[0110] The first bracket portion is formed into a gate shape by the bracket leg portion and the beam portion.

[0111] (Item 2) The vertical drum crusher according to Item 1, wherein:

[0112] In a plan view, a plurality of the roller assemblies are arranged between the frame leg portion closest to one circumferential side from a point dividing the circumferential length of the first frame portion by two and the frame leg portion closest to the other circumferential side from the point dividing the circumferential length by two.

[0113] (Item 3) The vertical drum crusher according to Item 1 or 2, wherein:

[0114] The first bracket portion supports the two roller assemblies.

[0115] (Item 4) The vertical drum crusher according to Item 3, wherein:

[0116] A reduction device is provided, which reduces the speed of rotation input from a driving source and transmits it to the turntable,

[0117] The dimension between the bracket legs in the first bracket portion is larger than the dimension of the reduction gear transmission.

[0118] (Item 5) A vertical roller crusher according to any one of Items 1 to 4, wherein:

[0119] The first bracket portion is made of a material including concrete.

[0120] (Item 6) A vertical roller crusher according to any one of Items 1 to 5, wherein:

[0121] The number of the roller assemblies is 6 or more.

[0122] (Item 7) A vertical roller crusher according to any one of Items 1 to 6, wherein:

[0123] In the first bracket portion, the bracket leg portion and the drum assembly are arranged in phases different from each other.

[0124] (Item 8) A method for maintaining a speed reducer is a method for maintaining the speed reducer in a vertical drum crusher, the vertical drum crusher comprising:

[0125] a turntable arranged in a rotatable manner;

[0126] a plurality of crushing rollers, which are pressed on the crushing object on the turntable to crush the crushing object;

[0127] A plurality of roller assemblies, each of which is provided with a plurality of the crushing rollers;

[0128] a plurality of support parts, which are arranged around the turntable and used to support the roller assembly; and

[0129] A reduction gear is used to reduce the speed of rotation input from a driving source and transmit it to the turntable, wherein:

[0130] The support part includes a first support part supporting a plurality of the roller assemblies, and the plurality of the roller assemblies are adjacently arranged in the circumferential direction of the turntable.

[0131] The first support portion comprises:

[0132] a plurality of support legs which are provided so as to extend in the up-down direction and are arranged in pairs in the circumferential direction of the turntable; and

[0133] a beam portion connecting the upper portions of the support legs to each other in the circumferential direction of the turntable,

[0134] The first support part is formed into a gate shape by the support leg part and the beam part, and

[0135] The method includes the step of moving the reduction device out of the vertical drum crusher through the internal space of the first support portion.

Claims

1. A vertical drum crusher, comprising: a turntable arranged in a rotatable manner; a plurality of crushing rollers, which are pressed on the crushing object on the turntable to crush the crushing object; a plurality of roller assemblies, each of which is provided with the pulverizing roller; and A plurality of support parts are arranged around the turntable and used to support the roller assembly, the support part includes a first support part supporting the plurality of roller assemblies, and the plurality of roller assemblies are adjacently arranged in the circumferential direction of the turntable. The first support portion comprises: a plurality of support legs which are provided so as to extend in the up-down direction and are arranged in pairs in the circumferential direction of the turntable; and a beam portion connecting the upper portions of the support legs to each other in the circumferential direction of the turntable, The first bracket portion is formed into a gate shape by the bracket leg portion and the beam portion.

2. The vertical drum crusher according to claim 1, wherein: In a plan view, a plurality of the roller assemblies are arranged between the frame leg portion closest to one circumferential side from a point dividing the circumferential length of the first frame portion by two and the frame leg portion closest to the other circumferential side from the point dividing the circumferential length by two.

3. The vertical drum crusher according to claim 1, wherein: The first bracket portion supports the two roller assemblies.

4. The vertical drum crusher according to claim 3, wherein: A reduction device is provided, which reduces the speed of rotation input from a driving source and transmits it to the turntable, The dimension between the bracket legs in the first bracket portion is larger than the dimension of the reduction gear transmission.

5. The vertical drum crusher according to claim 1, wherein: The first bracket portion is made of a material including concrete.

6. The vertical drum crusher according to claim 1, wherein: The number of the roller assemblies is 6 or more.

7. The vertical drum crusher according to claim 1, wherein: In the first bracket portion, the bracket leg portion and the drum assembly are arranged in phases different from each other.

8. A method for maintaining a speed reducer, which is a method for maintaining the speed reducer in a vertical drum crusher, the vertical drum crusher comprising: a turntable arranged in a rotatable manner; a plurality of crushing rollers, which are pressed on the crushing object on the turntable to crush the crushing object; A plurality of roller assemblies, each of which is provided with a plurality of the crushing rollers; A plurality of support parts, which are arranged around the turntable and used to support the roller assembly; and A deceleration device, which is used to decelerate the rotation input from the driving source and transmit it to the turntable, wherein the support part includes a first support part supporting a plurality of the roller assemblies, and the plurality of the roller assemblies are adjacently arranged in the circumferential direction of the turntable, The first support portion comprises: a plurality of support legs which are provided so as to extend in the up-down direction and are arranged in pairs in the circumferential direction of the turntable; and a beam portion connecting the upper portions of the support legs to each other in the circumferential direction of the turntable, The first support part is formed into a gate shape by the support leg part and the beam part, and the method includes the step of moving the reduction gear device out of the vertical drum crusher through the internal space of the first support part.

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