Coke oven condition monitoring device, extruder

Abstract

To provide a condition monitoring device capable of accurately detecting symptom of clogging of a coke oven as one of purposes by the present disclosure.SOLUTION: A condition monitoring device 10 of a coke oven 1 of one aspect comprises: a vibration acquisition part that acquires vibration information related to vibration when pushing an extrusion ram 54 into a coke oven chamber 70 of the coke oven 1; and a determination part that determines a state of the coke oven chamber 70 based on the vibration information acquired by the vibration acquisition part.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a coke oven condition monitoring device and an extruder.

Background Art

[0002] Devices for monitoring the extrusion load of the carbonization chamber of a coke oven are known. For example, Patent Document 1 describes an extrusion load analysis device that analyzes the extrusion load to detect abnormalities in a coke oven. This analysis device generates an extrusion load change map representing the temporal change in the extrusion load of an extrusion ram that extrudes coke, and causes the generated extrusion load change map to be displayed on a display device so as to be visually distinguishable.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] A coke oven has a plurality of carbonization chambers, and the coke produced in each carbonization chamber is extruded and recovered outside the furnace by a ram beam mounted on an extruder. At that time, the extrusion of coke may be inhibited due to carbon adhering to the inside of the carbonization chamber or cracks or chips in the furnace wall due to damage, resulting in "jamming" where the ram beam cannot move. When jamming occurs, the compressed coke presses against the furnace wall, which can cause damage to the furnace wall. Eliminating jamming may take about half a day to three days, during which operation in the target carbonization chamber cannot be carried out and the operation efficiency decreases. Therefore, it is desirable to predict the occurrence of jamming and perform maintenance etc. in advance.

[0005] The extrusion load analyzer described in Patent Document 1 analyzes the extrusion load to detect abnormalities that indicate clogging and predicts the occurrence of clogging based on the detection results. However, since the condition of the furnace wall and the amount of carbon deposits differ in each carbonization chamber, the extrusion load also differs greatly from chamber to chamber. Therefore, there is a problem that simply analyzing the extrusion load does not allow for accurate detection of signs of clogging due to the influence of the differences in extrusion loads from one carbonization chamber to the other.

[0006] This invention has been made in view of these problems, and one of its objectives is to provide a condition monitoring device that can accurately detect signs of coke oven blockage. [Means for solving the problem]

[0007] To solve the above problems, a condition monitoring device according to one aspect of the present invention comprises a vibration acquisition unit that acquires vibration information relating to vibrations when an extrusion ram is pushed into the carbonization chamber of a coke oven, and a determination unit that determines the state of the carbonization chamber based on the vibration information acquired by the vibration acquisition unit.

[0008] Another aspect of the present invention is an extruder. This extruder comprises an extrusion ram, a drive unit for driving the extrusion ram, and a condition monitoring device provided on the drive unit. The condition monitoring device includes a vibration acquisition unit for acquiring vibration information related to vibrations when the extrusion ram is pushed into the carbonization chamber, and a determination unit for determining the state of the carbonization chamber based on the vibration information.

[0009] Furthermore, any combination of the above components, or in which the components or expressions of the present invention are mutually substituted among methods, systems, etc., are also valid embodiments of the present invention. [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a condition monitoring device that can accurately detect signs of coke oven blockage. [Brief explanation of the drawing]

[0011] [Figure 1]This figure shows an example of a coke oven equipped with a condition monitoring device according to the embodiment. [Figure 2] This is a block diagram schematically showing the condition monitoring device shown in Figure 1. [Figure 3] This figure shows an example of vibration information obtained for a coke oven. [Figure 4] This figure shows the relationship between the number of coke oven extrusion cycles and vibration information. [Modes for carrying out the invention]

[0012] The present disclosure will be described below with reference to the drawings, based on preferred embodiments. In embodiments and modifications, the same or equivalent components and members will be denoted by the same reference numerals, and redundant descriptions will be omitted as appropriate. In addition, the dimensions of members in each drawing will be enlarged or reduced as appropriate for ease of understanding. Furthermore, some members that are not important for explaining the embodiments will be omitted from the drawings.

[0013] Furthermore, separate components that share common characteristics are distinguished by adding "1st," "2nd," etc., to the beginning of their names, and these are omitted when referring to them collectively. Terms containing ordinal numbers such as "1st," "2nd," etc., are used to describe various components, but these terms are used solely for the purpose of distinguishing one component from others, and do not limit the components themselves.

[0014] [Embodiment] The condition monitoring device 10 according to the embodiment of this disclosure will be described below with reference to the drawings. Figure 1 is a diagram showing an example of a coke oven 1 equipped with the condition monitoring device 10 according to the embodiment. Figure 2 is a schematic block diagram showing the condition monitoring device 10. The condition monitoring device 10 is installed in the extruder 100 of the coke oven 1. In this specification, the installation surface of the extruder 100 is defined as the horizontal plane, the viewpoint from a direction perpendicular to the horizontal plane is referred to as a "plan view," and the diagram of the plan view is referred to as a "plan view."

[0015] For the sake of explanation, the explanation will primarily be based on the XYZ Cartesian coordinate system. The X-axis and Z-axis directions are mutually orthogonal directions along the horizontal plane, corresponding to the left-right and right-perpendicular directions on the paper in Figure 1. The Y-axis direction is perpendicular to the horizontal plane, corresponding to the up-down direction on the paper in Figure 1. The positive direction of the X, Y, and Z axes is defined by the direction of the arrow in each figure, and the negative direction is defined in the direction opposite to the arrow. This notation of directions does not restrict the operating orientation of the condition monitoring device 10, and the condition monitoring device 10 can be used in any orientation.

[0016] (Coke oven) As shown in Figure 1, the coke oven 1 mainly comprises an extruder 100 and a carbonization chamber 70. The coke oven 1 includes a plurality of carbonization chambers 70 arranged in the Z-axis direction. Hereinafter, in the X-axis direction, the side of the carbonization chamber 70 where the extruder 100 is located will be referred to as the inlet side (left side in the paper), and the opposite side will be referred to as the anti-inlet side (right side in the paper). The extruder 100 is positioned near the inlet side of the carbonization chamber 70 so as to be movable in the Z-axis direction on a rail 82 extending in the Z-axis direction. The carbonization chamber 70 has a furnace opening 71 provided on the inlet side and an outlet 73 provided on the anti-inlet side.

[0017] The extruder 100 moves along the rail 82 in the Z-axis direction, extruding coke from each carbonization chamber 70. The extruder 100 uses an extrusion ram 54 pushed in from the furnace opening 71 to extrude the coke 76 produced by carbonization in the carbonization chamber 70 towards the guide wheel 75 from the discharge port 73.

[0018] In this example, the coke oven 1 comprises a plurality (for example, three) of extruders 100 arranged in the Z-axis direction. Figure 1 shows one of the three extruders 100. For example, while one of the multiple extruders 100 is extruding coke in one carbonization chamber 70, another extruder 100 can extrude coke in another carbonization chamber 70.

[0019] The state monitoring device 10 may be provided in all of the plurality of extruders 100. In the present embodiment, the state monitoring device 10 is provided in some of the plurality of extruders 100 and is not provided in the extruders other than some of the plurality of extruders 100. In this example, the state monitoring device 10 is provided in one of the three extruders 100 and is not provided in the other two extruders 100.

[0020] The extruder 100 has a drive unit 60, an extrusion ram 54, and a carriage unit 80. The carriage unit 80 has a wheel unit 84 capable of traveling on a rail 82 and supports the drive unit 60 and the extrusion ram 54. The extrusion ram 54 includes a ram beam 55 extending in the X-axis direction and a ram head 56 provided on the non-inlet side of the ram beam 55. Rack teeth 57 are provided on the ram beam 55.

[0021] [[ID=⑧]]The drive unit 60 includes a motor 61, a pinion gear 64 meshing with the rack teeth 57 of the ram beam 55, and a speed reducer 62 that decelerates the output rotation of the motor 61 and transmits it to the pinion gear 64. The speed reducer 62 is a right-angle speed reducer whose input-side rotation axis extends in the X-axis direction and whose output-side rotation axis extends in the Z-axis direction. When the pinion gear 64 rotates due to the rotation of the motor 61, the rack teeth 57 meshing with the pinion gear 64 move integrally with the extrusion ram 54 in the X-axis direction. For example, when the motor 61 rotates in the forward direction, the extrusion ram 54 moves toward the non-inlet side, and when the motor 61 rotates in the reverse direction, the extrusion ram 54 moves toward the inlet side. That is, the drive unit 60 applies a pushing load to the extrusion ram 54 via the pinion gear 64.

[0022] (State monitoring device) In the present embodiment, the state monitoring device 10 is provided in the drive unit 60. The state monitoring device 10 includes a vibration acquisition unit 12, a load acquisition unit 14, a speed acquisition unit 16, and an information processing unit 30. The information processing unit 30 includes a determination unit 33, which will be described later.

[0023] The vibration acquisition unit 12 acquires vibration information J1 related to the vibrations when the extrusion ram 54 is pushed into the carbonization chamber 70 of the coke oven 1. There are no limitations on the configuration of the vibration acquisition unit 12, but in this example, the vibration acquisition unit 12 includes a vibration sensor 11 that detects vibrations. As the vibration sensor 11, a known vibration sensor such as a piezoelectric acceleration sensor can be used. The vibration data detected by the vibration sensor 11 is exemplified by the vibration information J1.

[0024] There are no limitations on the installation location of the vibration sensor 11, but in this example, the vibration sensor 11 detects vibrations of the drive unit 60 that applies a pressing load to the extrusion ram 54. Specifically, it is attached to a cylindrical portion 68 of the casing of the drive unit 60 that supports the output shaft 63 of the reduction gear 62 to which the pinion gear 64 is fixed. The cylindrical portion 68 surrounds the output shaft 63 and supports the output shaft 63 via bearing means (not shown).

[0025] The load acquisition unit 14 acquires load information J2 related to the pressing load when the extrusion ram 54 is pressed. There are no limitations on the configuration of the load acquisition unit 14, but in this example, the load acquisition unit 14 includes a current sensor 13 that detects the drive current of the motor 61. The drive current of the motor 61 is roughly proportional to the pressing load of the extrusion ram 54. As an example, the load information J2 is exemplified by the drive current (A) of the motor 61 detected by the current sensor 13.

[0026] The speed acquisition unit 16 acquires speed information J3 relating to the moving speed of the extrusion ram 54. There are no limitations on the configuration of the speed acquisition unit 16, but in this example, the speed acquisition unit 16 includes a speed sensor 15 that detects the rotational speed of the motor 61. The speed sensor 15 is a proximity sensor positioned to detect the approach of an axial projection 153 (e.g., a bolt head) provided on a rotating body 152 (e.g., a coupling) that rotates integrally with the output shaft 612 of the motor 61. Multiple projections 153 may be provided at predetermined intervals in the circumferential direction. The speed sensor 15 outputs a pulse signal when the projection 153 approaches and moves away. The interval (duration) of the pulse signal output by the speed sensor 15 is roughly inversely proportional to the moving speed of the extrusion ram 54. As an example, the speed information J3 is exemplified by the rotational speed (rpm) of the pinion gear 64, which is calculated from the interval of the pulse signal detected by the speed sensor 15.

[0027] (Information Processing Department) The information processing unit 30 will be described with reference to Figure 2. Each block shown in Figure 2 can be realized in hardware terms by elements and mechanical devices such as the CPU (Central Processing Unit) of a computer, and in software terms by computer programs, etc., but here, the functional blocks realized through the cooperation of these are depicted. Therefore, it will be understood by those skilled in the art who have read this specification that these functional blocks can be realized in various forms by combinations of hardware and software.

[0028] The information processing unit 30 includes an input unit 31, a storage unit 32, a determination unit 33, and a transmission unit 34. The input unit 31 is an input port that receives vibration information J1, load information J2, and velocity information J3. Hereinafter, vibration information J1, load information J2, and velocity information J3 will be collectively referred to as "received information." The storage unit 32 stores the received information received by the input unit 31 in chronological order. The storage unit 32 also stores previously acquired reference vibration information S1, threshold information for determination by the determination unit 33, and intermediate information generated within the information processing unit 30. The storage unit 32 can store the stored information in association with the carbonization chamber 70 corresponding to that information.

[0029] The determination unit 33 determines the state of the carbonization chamber 70 based on the vibration information J1. In particular, the determination unit 33 in this example determines the state of the carbonization chamber 70 based on the vibration information J1, load information J2, and velocity information J3. For example, the determination unit 33 can determine the state of each carbonization chamber 70 using reference vibration information S1 that has been acquired in advance for each carbonization chamber 70.

[0030] The determination unit 33 evaluates the vibration information J1 by referring to the reference vibration information S1, classifies it into several ranks according to the level of difference between the vibration information J1 and the reference vibration information S1, and provides the resulting rank as the determination result E1. For example, the determination result E1 is rank 1 if it is determined that the possibility of jamming is low, rank 2 if it is determined that the possibility of jamming is moderate, and rank 3 if it is determined that there is a high possibility of jamming. The determination result E1 is stored in the storage unit 32.

[0031] The transmitting unit 34 transmits the judgment result E1 to an external source. For example, the judgment result E1 transmitted by the transmitting unit 34 may be displayed on the screen of the monitor 36 in the driver's cab. In this example, if the judgment result E1 transmitted by the transmitting unit 34 is rank 3, the notification unit 35 located near the corresponding carbonization chamber 70 is made to emit light in a predetermined manner.

[0032] Next, an example of the determination method will be explained. Figure 3 shows an example of vibration information J1 acquired for coke oven 1. This figure shows the vibration envelope acquired for the carbonization chamber 70 in which coke oven 1 is located. The horizontal axis of this figure shows the elapsed time from the start to the end of the extrusion operation of the extrusion ram 54, and the vertical axis of this figure shows the amplitude of the vibration information J1 as a relative value. Here, we show an example in which a blockage occurred in the Nth extrusion operation after maintenance of the carbonization chamber 70. The solid line graph g1 shows the envelope of vibration information J1 acquired in the first extrusion operation after maintenance of the carbonization chamber 70. The dashed line graph g3 shows the envelope of vibration information J1 when a blockage occurred in the Nth extrusion operation after maintenance. The dashed line graph g2 shows the envelope of vibration information J1 acquired in the extrusion operation immediately before the blockage (N-1th operation after maintenance).

[0033] As shown in graph g1, in the initial period after maintenance, the vibration information J1 has a gradually increasing section where the amplitude gradually increases from the start of the extrusion operation, a constant amplitude section where the amplitude remains almost constant from the end of the gradually increasing section, and a gradually decreasing section where the amplitude gradually decreases from the end of the constant amplitude section. Note that these patterns are merely examples, and various patterns may occur.

[0034] As shown in graph g3, in a jammed state, the vibration information J1 is characterized by the random appearance of large-amplitude sections with particularly large vibrations and small-amplitude sections with particularly small vibrations. Small-amplitude sections appear when the extrusion resistance of the coke 76 becomes excessive and the extrusion ram 54 stops moving. Large-amplitude sections appear when the pressing load is increased while the machine is stopped, or when the extrusion ram 54 moves for a short time. After the small-amplitude and large-amplitude sections appear alternately, the small-amplitude sections remain continuous. At this time, the machine is in a jammed state where the extrusion ram 54 remains stopped.

[0035] As shown in graph g2, in the state immediately before jamming, the vibration information J1 has a gradually increasing portion, a constant amplitude portion, and a gradually decreasing portion, and the overall amplitude is greater than that shown in graph g1. By identifying the characteristics of the vibration information J1 immediately before jamming, signs of jamming can be detected early. The vibration information J1 can be quantified as the envelope peak, the average value of the amplitude, and the effective value of the amplitude. In this embodiment, the vibration information J1 is quantified by the effective value of the amplitude (root mean square) over a predetermined period from the start of the extrusion operation. The predetermined period may be, for example, from the start of extrusion to the end of extrusion. In the following description, vibration information J1 means the effective value of the amplitude.

[0036] Figure 4 shows the relationship between the number of extrusion operations (ordinal) after maintenance and vibration information J1. The number of extrusions on the horizontal axis is shown as an ordinal number, with the number of operations when jamming occurred being N. As shown in Figure 4, the vibration information J1 at the N-1 and N-2 operations immediately before jamming was significantly greater than the vibration information J1 at the 1st to 3rd, N-4th, and N-3rd operations. When the same evaluation was performed for many other carbonization chambers 70, although there were differences in the absolute value of vibration for each carbonization chamber 70, the pattern of change when relative showed the same trend.

[0037] Based on these findings, in this embodiment, the determination unit 33 determines that, for a given vibration information J1 of a target for determination, the vibration information J1 from the extrusion operation immediately preceding the target for determination is used as pre-acquired reference vibration information S1. As an example, the determination unit 33 determines that if the vibration information J1 of the target for determination is 25% or more higher than the reference vibration information S1, it is ranked as rank 3, indicating a high probability of jamming; if it is 20% to 24% higher, it is ranked as rank 2, indicating a moderate probability of jamming; and in all other cases, it is ranked as rank 1, indicating a low probability of jamming.

[0038] For example, if the value obtained by adding 25% of the reference vibration information S1 is set as the first threshold TV-1, and the vibration information J1 is greater than or equal to the first threshold TV-1, it can be determined that there is a high probability of compression occurring. Similarly, if the value obtained by adding 20% ​​of the reference vibration information S1 is set as the second threshold TV-2, and the vibration information J1 is less than the first threshold TV-1 but greater than or equal to the second threshold TV-2, it can be determined that there is a moderate probability of compression occurring. These determination methods and thresholds are merely examples, and various modifications are possible. The first threshold TV-1 and the second threshold TV-2 can be set based on experimental results.

[0039] High accuracy in the determination is desirable. Therefore, in this embodiment, the determination unit 33 determines the state of the carbonization chamber 70 based on vibration information J1, load information J2, and velocity information J3. According to the inventors' studies, it has been found that before blockage occurs, the load increases compared to before, and the velocity decreases compared to before. For example, the load information J2 in the N-1 and N-2 cycles immediately before blockage is higher than the load information J2 in the N-3 to N-4 cycles, and the velocity information J3 in the N-1 and N-2 cycles immediately before blockage is lower than the velocity information J3 in the N-3 to N-4 cycles.

[0040] Based on these findings, in this embodiment, a threshold TL is set for load information J2 and a threshold TS is set for velocity information J3. In this embodiment, the determination unit 33 evaluates and determines the vibration information J1 based on the first threshold TV-1 and the second threshold TV-2 when, for a given target for determination, the load information J2 is greater than or equal to the threshold TL and the velocity information J3 is less than or equal to the threshold TS. The thresholds TL and TS can be set based on experimental results. For example, the threshold TL can be set to 500A and the threshold TS to 200rpm.

[0041] The features of the condition monitoring device 10 configured as described above will now be explained. The coke oven condition monitoring device 10 of this embodiment includes a vibration acquisition unit 12 that acquires vibration information J1 related to vibrations when the extrusion ram 54 is pushed into the carbonization chamber 70 of the coke oven 1, and a determination unit 33 that determines the state of the carbonization chamber 70 based on the vibration information J1 acquired by the vibration acquisition unit 12.

[0042] With this configuration, the state of the carbonization chamber 70 is determined based on vibration information J1, thereby reducing the influence of individual differences in the carbonization chamber 70 and improving the accuracy of the determination.

[0043] In this embodiment, the determination unit 33 determines the state of each carbonization chamber 70 using reference vibration information S1 acquired in advance for each carbonization chamber 70. In this case, the determination can be made by comparing it with reference vibration information S1 acquired in the past for each carbonization chamber 70, thereby reducing the influence of individual differences in the carbonization chambers 70 and further improving the determination accuracy.

[0044] This embodiment further includes a load acquisition unit 14 that acquires load information J2 related to the pressing load when the extrusion ram 54 is pressed, and a speed acquisition unit 16 that acquires speed information J3 related to the moving speed of the extrusion ram 54. In the condition monitoring device 10, the determination unit 33 determines the state of the carbonization chamber 70 based on vibration information J1, load information J2 acquired by the load acquisition unit 14, and speed information J3 acquired by the speed acquisition unit 16. In this case, since load information J2 and speed information J3 are used in addition to vibration information J1, the number of misjudgments can be reduced.

[0045] In this embodiment, the vibration acquisition unit 12 includes a vibration sensor 11 that detects vibrations of the drive unit 60 that applies a pressing load to the extrusion ram 54. In this case, the vibration sensor 11 can be positioned away from the high-temperature carbonization chamber 70, thus reducing thermal damage to the vibration sensor 11. Furthermore, since vibrations between the coke 76 and the furnace wall of the carbonization chamber 70 are directly transmitted to the drive unit 60 via the extrusion ram 54, these vibrations can be detected efficiently with minimal transmission loss.

[0046] In this embodiment, a transmission unit 34 is provided to transmit the determination result of the determination unit 33 to an external source. In this case, the operator can easily recognize the determination result, allowing for quick response to maintenance and other issues.

[0047] In this embodiment, the extruder 100 includes an extrusion ram 54, a drive unit 60 that drives the extrusion ram 54, and a condition monitoring device 10 provided on the drive unit 60. The condition monitoring device 10 includes a vibration acquisition unit 12 that acquires vibration information J1 related to vibrations when the extrusion ram 54 is pushed into the carbonization chamber 70, and a determination unit 33 that determines the state of the carbonization chamber 70 based on the vibration information J1. In this case, compared to the case in which the condition monitoring device 10 is provided on all extruders 100, maintenance of the condition monitoring device 10 becomes easier and is more cost-effective.

[0048] The embodiments of the present invention have been described in detail above. The embodiments described above are merely examples of how to implement the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes, such as changes, additions, and deletions of components, are possible as long as they do not depart from the spirit of the invention as defined in the claims. In the embodiments described above, such design changes are described with notations such as "of the embodiments" or "in the embodiments," but design changes are also permitted in contents without such notations.

[0049] The following describes modified examples. In the drawings and descriptions of modified examples, components and parts that are the same as or equivalent to those in the embodiments are denoted by the same reference numerals. Descriptions that overlap with those in the embodiments will be omitted as appropriate, and the descriptions will focus on the configurations that differ from those in the embodiments.

[0050] (modified version) In the description of the embodiment, an example was shown in which the vibration information J1 from the extrusion operation immediately preceding the extrusion operation to be judged is set as the reference vibration information S1, but the invention is not limited to this. The reference vibration information S1 may be set based on the vibration information J1 from any extrusion operation prior to the extrusion operation to be judged, not just the immediate preceding one. For example, the minimum vibration information J1 from multiple extrusion operations prior to the extrusion operation to be judged may be used as the reference vibration information S1, or the average value of the vibration information J1 from multiple extrusion operations prior to the extrusion operation to be judged may be used as the reference vibration information S1.

[0051] The description of the embodiment shows an example in which the vibration information J1 of a single extrusion operation is used for determination, but it is not limited to this. The vibration information J1 of multiple extrusion operations may also be used for determination.

[0052] In the description of the embodiment, an example was shown in which it is determined that there is a high probability of jamming occurring when the vibration information J1 of a single extrusion operation is above a threshold, but the invention is not limited to this. For example, it may be determined that there is a high probability of jamming occurring when the vibration information J1 of multiple consecutive extrusion operations (e.g., two times) exceeds the threshold.

[0053] Each of the above-described modifications produces the same functions and effects as the embodiments.

[0054] Any combination of the components and modifications of the embodiments described above is also useful as an embodiment of the present invention. The new embodiments resulting from these combinations possess the combined effects of both the combined embodiments and the modifications. [Explanation of Symbols]

[0055] 1 coke oven, 10 condition monitoring device, 11 vibration sensor, 12 vibration acquisition unit, 14 load acquisition unit, 16 speed acquisition unit, 33 judgment unit, 34 transmission unit, 54 extrusion ram, 60 drive unit, 70 carbonization chamber, 76 coke, 100 extruder.

Claims

1. A vibration acquisition unit that acquires vibration information related to vibrations detected as the acceleration of the extrusion ram when the extrusion ram is pushed into the carbonization chamber of the coke oven, A determination unit that determines the state of the carbonization chamber based on the vibration information acquired by the vibration acquisition unit, Equipped with, The determination unit is a coke oven condition monitoring device that determines signs of clogging in the carbonization chamber based on the characteristics of the vibration information immediately before clogging.

2. The vibration information includes a gradually increasing section in which the amplitude gradually increases from the start of the extrusion operation, a constant amplitude section in which the amplitude remains almost constant from the end of the gradually increasing section, and a gradually decreasing section in which the amplitude gradually decreases from the end of the constant amplitude section. The condition monitoring device according to claim 1, wherein the characteristics of the vibration information include any of the characteristics of the increasing portion, the constant amplitude portion, and the decreasing portion.

3. The condition monitoring device according to claim 1 or 2, wherein the determination unit determines the state of the carbonization chamber using reference vibration information acquired in advance for the carbonization chamber.

4. The condition monitoring device according to claim 3, wherein the determination unit classifies the vibration information into a plurality of ranks according to the level of difference of the vibration information with respect to the reference vibration information, and provides the rank after classification as a determination result.

5. A load acquisition unit that acquires load information relating to the pressing load when the extrusion ram is pressed in, A speed acquisition unit that acquires speed information relating to the moving speed of the extrusion ram, Furthermore, The condition monitoring device according to any one of claims 1 to 4, wherein the determination unit determines the state of the carbonization chamber based on the vibration information, the load information acquired by the load acquisition unit, and the speed information acquired by the speed acquisition unit.

6. The condition monitoring device according to any one of claims 1 to 5, wherein the vibration acquisition unit includes a vibration sensor that detects vibrations of a drive unit that applies a pressing load to the extrusion ram.

7. The status monitoring device according to any one of claims 1 to 6, further comprising a transmission unit for transmitting the determination result of the determination unit to an external source.

8. Extruded ram and, A drive unit for driving the extrusion ram, A condition monitoring device provided in the drive unit, Equipped with, The state monitoring device includes a vibration acquisition unit that acquires vibration information related to vibration detected as the acceleration of the extrusion ram when the extrusion ram is pushed into the carbonization chamber, and a determination unit that determines signs of jamming in the carbonization chamber based on the vibration information immediately before jamming. An extruder having the following features.

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