JP4655829B2 - Reel cable disconnection prevention device - Google Patents

Description

  The present invention is applied to a mobile carriage provided with a cable reel for winding a cable that transmits power and / or control signals to the carriage, and by accurately grasping the cable reel winding abnormality, The present invention relates to a reel cable disconnection prevention device capable of preventing the disconnection of a reel cable caused by an abnormal take-off.

  In steelworks, steel receiving carts are used to transport molten steel that has been blown and adjusted in the converter to the degassing equipment, ladle refining furnace (LF), continuous casting equipment, etc., which are in the lower process. It has been. And this steel receiving cart is connected with a cable for transmitting power, control signals, etc. from the ground, and in order to prevent the cable from being hit by the moving cart, A cable reel is provided.

  Normally, power cables and control signal cables are provided near the middle point of the traveling rail where the connection part of the connector such as the feeding point that is the ground side fixed part is the traveling range of the mobile carriage in order to shorten the cable length. It is done. Therefore, with the fixed part as a boundary, depending on the traveling direction of the moving carriage, one is a direction for winding the cable, and the other is a direction for rewinding.

  Initially, the winding of the cable by the cable reel was simply controlled so that a rotational torque in a constant winding direction is always applied regardless of changes in the traveling direction and traveling speed of the movable carriage. In this case, the cable may be damaged by winding the cable with an abnormally high tension or applying an abnormally high tension without unwinding the cable. In addition, for example, the cable left on the ground side may be cut by the traveling wheel of the moving carriage by the oil leak of the hydraulic motor or the abnormality of the torque motor. In some cases, the cable may come off and wind around the cable reel shaft leading to cable cutting.

For such problems, Patent Document 1 discloses a cable winding abnormality detection device for control, power, etc. in a rail machine that travels on a rail such as a stacker or a reclaimer. This cable winding abnormality detection device has a phase according to the rotation of a cable reel that winds a running state detecting means that detects a running state of the rail machine and a cable that connects between the rail machine and the ground side fixing portion. A reel rotation detecting means for outputting a detection pulse that is shifted, a micro rotation area detecting means for detecting that the rail machine is in a micro rotation area of a cable reel based on a detection result of the running state detecting means, and the running Abnormal rotation direction and rotational speed of the cable reel based on the detection pulse of the reel rotation detection means when the state detection means detects that the vehicle is running and the minute rotation area detection means does not detect the minute rotation area. And abnormality determination means for determining whether or not any of the rotation hunting abnormality occurs. Thereby, it is possible to easily and reliably detect abnormal states of winding and unwinding of the cable by the cable reel.
Japanese Patent No. 2583544

  However, the cable winding abnormality detection device of Patent Document 1 calculates the rotation state of the cable reel and the traveling state of the rail machine based on the detection results of the reel rotation detection unit and the traveling state detection unit, On the basis of the judgment criteria set in advance, it is necessary to perform a complicated calculation to determine whether any of the abnormalities in the rotational direction, rotational speed and rotational hunting of the cable reel has occurred. In order to make the determination accurate, a high-performance sensor and a high-performance arithmetic device for performing complex arithmetic processing are required, which causes a problem that equipment costs increase.

  In addition, when the cable winding abnormality detection device of Patent Document 1 is applied to a steel receiving cart that transports molten steel from a converter to a facility in a lower process, there is a problem in that erroneous detection frequently occurs during rotation abnormality detection. there were. Here, while the steel receiving trolley is receiving steel from the converter, adjustment is performed by slightly moving the position of the trolley depending on the steel output angle of the converter in order to reliably receive steel. . The movement is called inching traveling, but the erroneous detection at the time of detecting the rotation abnormality frequently occurs during the inching traveling.

  Accordingly, the present invention provides a reel cable disconnection prevention device capable of preventing cable disconnection by accurately grasping cable reel winding abnormality while preventing an increase in equipment costs. Objective. It is also a first object of the present invention to provide a reel cable disconnection prevention device capable of preventing erroneous detection at the time of detecting rotation abnormality even when applied to a steel receiving cart that transports molten steel from a converter to a lower process facility. Second purpose.

In order to solve the above problems, the present invention has the following configuration.
[1] A reel cable disconnection prevention device in a mobile carriage provided with a cable reel for winding a cable that transmits power and / or control signals to the carriage,
A cable reel rotation detection means for detecting the rotation state of the cable reel;
Trolley position detecting means for detecting whether the mobile trolley is located on the front stage side or the rear stage side with reference to the ground side fixing portion of the cable;
Traveling state detection means for detecting at least data of the traveling direction of the mobile carriage;
Based on the cable reel rotation state detected by the cable reel rotation detection means, the carriage position detected by the carriage position detection means, and the traveling state of the movable carriage detected by the traveling state detection means, a moving carriage Detects anomalies that are rotating backward in the direction of winding or unwinding the cable reel during the movement of the cable , and detects an abnormal rotation that does not rotate the cable reel , and detects an abnormal rotation of the cable reel when the carriage is stopped Rotation abnormality detecting means for performing
An abnormality signal output means for outputting an abnormality signal when an abnormality is detected by the rotation abnormality detection means;
The cart position detection means detects the bending direction from the ground side fixing portion of the cable in the vicinity of the ground side fixing portion of the cable, and the bending direction of the cable from the ground side fixing portion is directed to the front stage side. When detected, the detection result is transmitted to the rotation abnormality detection means, and when it is detected that the bending direction of the cable from the ground side fixing portion of the cable is directed to the rear stage side, the detection result is detected as rotation abnormality. A bending direction detecting means for transmitting to the means;
The rotation abnormality detection unit is configured not to detect the cable reel rotation abnormality during the movement of the movable carriage in a section where the detection of the bending direction by the bending direction detection unit is not detected. Reel cable disconnection prevention device.
[2] In the above [1], the cable reel rotation detection means includes at least two proximity sensors;
A calculation unit that calculates the presence / absence and direction of rotation of the cable reel using detection pulses output from the at least two proximity sensors and transmits the calculation result to the rotation abnormality detection unit; Reel cable disconnection prevention device.
[3] In the above [1] or [2], the travel state detection means reads travel control information of a travel control system that remotely controls the mobile carriage, detects the travel state based on the travel control information, and detects the detection result. A reel cable disconnection prevention device characterized by being transmitted to a rotation abnormality detecting means.
[4] In any one of the above [1] to [3], the moving carriage is a steel receiving carriage that conveys molten steel from a converter provided on the front stage side to equipment in a lower process,
The rotation abnormality detection means is configured not to detect the cable reel reverse rotation abnormality during the movement of the steel receiving cart at least while the steel receiving cart receives the steel output from the converter, and the rotation abnormality is not detected. The reel cable disconnection prevention device is characterized in that a non-detection time from when a predetermined movement command is received is lengthened at the time of detection.

  According to the present invention, as a first effect, there is provided a reel cable disconnection prevention device capable of preventing cable disconnection by accurately grasping cable reel winding abnormality while preventing an increase in equipment cost. The In addition, as a second effect, there is a reel cable disconnection prevention device capable of preventing erroneous detection at the time of rotation abnormality detection even when applied to a steel receiving cart that transports molten steel from a converter to a lower process facility. Provided.

  Hereinafter, an example of the best mode for carrying out the present invention will be described.

  FIG. 1 is a diagram showing an example of a schematic configuration of a mobile carriage 1 having a cable reel 2 to which a reel cable disconnection preventing device according to the present invention is applied. In FIG. 1, the said mobile trolley has shown the case where it is a steel receiving trolley which conveys the molten steel from the converter 20 to the installation of a lower process. In addition, in the following description, although the said mobile trolley 1 is demonstrated as the steel receiving trolley 1, it is applicable also to a general mobile trolley.

  A reel cable disconnection prevention device according to the present invention is a reel cable disconnection prevention device in a steel receiving cart 1 provided with a cable reel 2 for winding up a cable 3 for transmitting power and / or control signals to the cart. The cable reel rotation detecting means 4 for detecting the rotation state of the reel 2 and the steel receiving cart 1 are arranged on the front stage side where the converter 20 is located or the lower process with reference to the feeding point 11 which is the ground side fixing portion of the cable 3. Are detected by the carriage position detecting means 5 for detecting which of the equipment is located on the rear stage side, the traveling state detecting means 6 for detecting the traveling state of the steel receiving carriage 1, and the cable reel rotation detecting means 4. The rotation state of the cable reel, the position of the steel receiving cart 1 detected by the cart position detecting means 5, and the steel receiving cart 1 detected by the running condition detecting means 6 Rotation abnormality detection means 7 for detecting a rotation abnormality of the cable reel based on the running state, and an abnormality signal output means 8 for outputting an abnormality signal when the rotation abnormality detection means 7 detects an abnormality. Is.

  Here, the case where the abnormality is detected by the rotation abnormality detecting means 7 is a case where the winding of the cable 3 is not normally performed and the cable 3 may be disconnected. Therefore, when an abnormality is detected by the rotation abnormality detection means 7, an abnormality signal is output from the abnormality signal output means 8, and an abnormality is notified to the operator by, for example, issuing an alarm or turning on a patrol light to notify the abnormality. The stop of the steel receiving cart 1 is urged. Alternatively, for example, a travel control system that receives an abnormal signal from the abnormal signal output means 8 and remotely controls the travel of the steel receiving cart 1 may automatically stop the travel of the steel receiving cart 1. By doing in this way, it becomes possible to prevent the cable 3 from being disconnected.

  Hereinafter, each of the means will be described in more detail.

[Cable reel rotation detection means 4]
FIG. 2 shows a configuration example of the cable reel rotation detection means 4. The cable reel rotation detection means 4 determines the presence / absence of rotation of the cable reel and the direction of rotation when the cable reel is rotating based on at least two proximity sensors and detection pulses out of phase output from the at least two proximity sensors. And a calculation unit 43 for calculating and transmitting the calculation result to the rotation abnormality detecting means 7. FIG. 2 shows a case where the two proximity sensors 41a and 41b are arranged on the side surface of the slit plate 42 having the same rotation axis as that of the cable reel 2 and rotating with the rotation of the cable reel 2, for example. The proximity sensors 41a and 41b are adjusted so as to output an on signal while the wing part (detection part) 42a of the slit plate 42 is passing, and the phase of each output pulse is shifted by 1/4, that is, 90 °. It is configured as follows. The presence / absence of rotation of the cable reel and the direction of rotation when the cable reel is rotating can be detected by the on / off timing of the two proximity sensors 41a and 41b.

  Here, the slit plate 42 shown in FIG. 2 shows a case in which twelve wing parts (detection parts) 42a are provided. The number of wing parts (detection parts) 42a depends on the required cable reel 2. The rotation detection accuracy can be selected as appropriate. For example, if the number of the wing parts (detection parts) 42a is increased, the rotation direction can be detected in a range where the rotation angle of the cable reel 2 is small.

  Needless to say, the configuration of the cable reel rotation detecting means 4 is not limited to the case shown in FIG. However, the method shown in FIG. 2 is preferable when it is attempted to detect the presence / absence of rotation of the cable reel and the direction of rotation when the cable reel is rotating reliably while simplifying the configuration. This also makes it possible to prevent an increase in equipment costs.

[Dolly position detecting means 5]
The carriage position detecting means 5 includes a bending direction detecting means for detecting a bending direction from the feeding point 11 of the cable 3 in the vicinity of the feeding point 11 which is a fixed portion on the ground side of the cable 3. When it is detected that the bending direction of the cable 3 from the feeding point 11 is directed to the previous stage where the converter 20 is located, the detection result is transmitted to the rotation abnormality detecting means 7, and the bending direction detecting means When it is detected that the bending direction of the cable 3 from the feeding point 11 is directed to the rear stage side, the detection result is transmitted to the rotation abnormality detecting means 7. When it is detected that the bending direction of the cable 3 from the feeding point 11 is directed to the front side where the converter 20 is located, it is determined that the steel receiving cart 1 is located on the front side, and the power feeding is performed. When it is detected that the bending direction of the cable 3 from the point 11 is directed to the rear stage side, it is determined that the steel receiving cart 1 is located on the rear stage side.

  FIG. 3 shows a configuration example of the bending direction detection means 51. The bending direction detecting means 51 may be configured such that, for example, the lower end portion thereof is pivotally supported on the ground side in the vicinity of the feeding point 11 of the cable 3 and the cable 3 is sandwiched between the upper end portion thereof. The tilting member 51a (see the perspective view) and two limit switches (LS) 51b and 51c for detecting the tilt direction of the tiltable member 51a can be used. The LSs 51b and 51c are provided on the left and right sides of the pivotable member 51a in the rotational direction, respectively, and the LS in the tilted direction of the tiltable member 51a is turned on so that the cable 3 from the feeding point 11 is turned on. Detect bending direction.

  The configuration of the carriage position detecting means 5 is not limited to the case shown in FIG. 3, and various configurations can be taken. For example, in the vicinity of the rail 12 closest to the feeding point 11, a lever that is tilted to the left and right by the passage of the steel receiving cart 1 is installed, and when the steel receiving cart 1 moves from the front side to the rear side, the lever moves to the rear side. It may be configured such that the rear side LS is turned on and the lever LS is turned on and the front side LS is turned on when the steel receiving cart 1 moves from the rear side to the front side.

[Running state detection means 6]
The traveling state detecting means 6 reads, for example, traveling control information such as traveling direction and traveling speed from a traveling control system that remotely controls the steel receiving cart 1 and transmits the read result to the rotation abnormality detecting means 7. It is. Here, it is assumed that the data transmitted to the rotation abnormality detecting means 7 includes at least data on the traveling direction of the steel receiving cart 1.

  Further, the traveling state detection means 6 does not read the traveling control information from the traveling control system as described above, but, for example, the rotational direction and the rotational direction of the traveling wheel attached to the traveling wheel of the steel receiving cart 1. The configuration may be such that the traveling direction, traveling speed, traveling position, and the like can be calculated by a signal from a sensor that counts the number.

[Rotation abnormality detection means 7]
The rotation abnormality detection means 7 is detected by the cable reel rotation detection means 4 and is transmitted by the transmission / reception data of the cable reel 2 and the rotation direction data when the cable reel 2 is rotating. And the transmitted data of the steel receiving cart 1 located on the front side or the rear side, and at least the data of the traveling direction of the steel receiving cart 1 transmitted by the traveling state detecting means 6. A rotation abnormality of the cable reel is detected by calculating with a computer or the like based on the data of the running state, and when the rotation abnormality is detected, the detection result of the rotation abnormality is transmitted to the abnormality signal output means 8. .

  Cases detected as abnormal rotation are described below.

(1) Cable reel rotation abnormality (reverse rotation abnormality and non-rotation abnormality) during movement of the steel receiving cart 1
A) The cart position detection means 5 detects that the steel receiving cart 1 is located on the front side, and the running state detection means 6 detects that the running direction is running to the converter 20 side (left side in FIG. 1). In this case, it is detected that the detection by the cable reel rotation detection means 4 is not rotating (non-rotating abnormality) or rotating in the direction of winding the cable (reverse rotating abnormality).

  B) When the receiving steel cart 1 is detected as being located on the rear stage side by the cart position detecting means 5, and further when the running state detecting means 6 is running on the equipment side of the lower process (right side in FIG. 1). When detected, it is detected that the detection by the cable reel rotation detection means 4 is not rotating (non-rotating abnormality) or rotating in the direction of winding the cable (reverse rotating abnormality).

  C) When the carriage position detection means 5 detects that the steel receiving carriage 1 is located on the front stage side, and the traveling state detection means 6 further travels the traveling direction toward the equipment side of the lower process (right side in FIG. 1). When detected, it is detected that the detection by the cable reel rotation detecting means 4 is not rotating (non-rotating abnormality) or rotating in the direction of unwinding the cable (reverse rotating abnormality).

  D) It is detected by the carriage position detection means 5 that the steel receiving carriage 1 is located on the rear side, and further, the running state detection means 6 detects that the running direction is running to the converter 20 side (left side in FIG. 1). In this case, it is detected that the detection by the cable reel rotation detecting means 4 is not rotating (non-rotating abnormality) or rotating in the direction of unwinding the cable (reverse rotating abnormality).

(2) Abnormal rotation of the cable reel while the receiving steel carriage 1 is stopped e) When the running condition detecting means 6 detects that the receiving steel carriage 1 is stopped, the detection by the cable reel rotation detecting means 4 When it is detected that it is rotating in the direction of taking or unwinding the cable.

  As described above, it is preferable to detect the cable reel reverse rotation abnormality and the non-rotation abnormality when the steel receiving carriage 1 is moved, and to detect the cable reel rotation abnormality when the steel receiving carriage 1 is stopped.

  By detecting the abnormality in the rotation abnormality detection means 7 by the above method, compared with the conventional method, a) it is not necessary to detect the absolute position of the carriage, and relative position detection around the feeding point may be used. B) Advanced rotation detection sensors (Selshin, TG), etc. are not required, and c) Basically, it is only necessary to process the ON and OFF signals. It is possible to prevent an increase in equipment cost due to the use of a high-performance computing device.

  Here, when the rotation abnormality is detected by the rotation abnormality detection means 7, the movement of the steel receiving carriage 1 is performed in a section where the detection of the bending direction by the bending direction detection means 51 in the carriage position detection means 5 is not detected. It is preferable not to detect the abnormal rotation of the cable reel at the time. This is to prevent a reduction in operating rate by preventing erroneous detection and preventing unnecessary device stoppage.

  The section in which the detection of the bending direction by the bending direction detecting means 51 is not detected is the case where the steel receiving cart 1 is located in the vicinity of the feeding point 11 and the cable 3 is less bent, that is, the cable 3 is almost upward. 3 is a section in which the tiltable member 51a shown in FIG. 3 has a small amount of tilt and the LS 51b and 51c are not turned on.

  Further, when the rotation abnormality detection means 7 detects the rotation abnormality, the cable reel reverse rotation abnormality during the movement of the steel receiving carriage 1 is at least during the time when the steel receiving carriage 1 receives steel from the converter 20. It is preferable not to perform the detection and to increase the non-detection time from the time of receiving the predetermined movement command when detecting the non-rotation abnormality. While the steel receiving cart 1 is receiving steel from the converter 20, this is called inching traveling in which the position of the steel receiving cart 1 is slightly moved according to the steel output angle of the converter 20 in order to reliably receive steel. Adjustments are being made. During this time, a movement command of a small distance with a short cycle is frequently issued to the steel receiving cart 1, so that the cable reel reverse rotation abnormality is not detected during the movement of the steel receiving cart 1, and When detecting anomalies, by extending the non-detection time from the time when a predetermined movement command is received, it is possible to prevent false detection and unnecessary equipment stoppage, and to prevent the operating rate from decreasing. It becomes.

  In detecting the non-rotation abnormality, to increase the non-detection time from the time of receiving a predetermined movement command, the normal non-detection time was 2 seconds, 1.5 times to 2 times, For example, it is 1.5 times 3 seconds. The extension of the non-detection time can be determined from the allowable amount of looseness when the cable is not wound.

[Abnormal signal output means 8]
The abnormality signal output means 8 outputs an abnormality signal when a rotation abnormality is received from the rotation abnormality detection means 7. As a method for outputting the abnormality signal, for example, a method of informing the operator of an abnormality by issuing an alarm or turning on a patrol light or the like that notifies the abnormality can be used. As a result, an operator who has noticed an abnormality can stop the steel receiving cart 1 and check the abnormal part to prevent the cable from being disconnected.

  Alternatively, a travel control system that receives the abnormality signal from the abnormality signal output means 8 and remotely controls the traveling of the steel receiving cart 1 may automatically stop the traveling of the steel receiving cart 1, for example.

  By applying the reel cable disconnection prevention device according to the present invention to the steel receiving cart having the configuration shown in FIG. 1, the disconnection of the cable that has conventionally occurred about 3 cases / year was 0 cases / year during the test period. It was.

  In addition, the malfunction due to the reel cable disconnection prevention device can be greatly reduced, and the effect of the present invention has been confirmed.

It is a figure which shows an example of schematic structure of the mobile trolley | bogie provided with the cable reel to which the reel cable disconnection prevention apparatus which concerns on this invention is applied. It is a figure which shows one structural example of the cable reel rotation detection means which concerns on this invention. It is a figure which shows the example of 1 structure of the bending direction detection means in the trolley | bogie position detection means which concerns on this invention.

Explanation of symbols

1 Steel receiving cart (mobile cart)
2 Cable reel 3 Cable 4 Cable reel rotation detection means 41a, 41b Proximity sensor 42 Slit plate 42a Wing (detection unit)
43 arithmetic unit 5 cart position detection means 51a retractable member 51b, 51c limit switch (LS)
6 Traveling state detection means 7 Rotation abnormality detection means 8 Abnormal signal output means 11 Feed point 12 Rail

Claims (4)

A reel cable disconnection preventing device in a mobile carriage provided with a cable reel for winding a cable for transmitting power and / or control signals to the carriage,
A cable reel rotation detecting means for detecting the presence / absence and rotation direction of the cable reel;
Trolley position detecting means for detecting whether the mobile trolley is located on the front stage side or the rear stage side with reference to the ground side fixing portion of the cable;
Traveling state detection means for detecting at least data of the traveling direction of the mobile carriage;
Based on the cable reel rotation state detected by the cable reel rotation detection means, the carriage position detected by the carriage position detection means, and the traveling state of the movable carriage detected by the traveling state detection means, a moving carriage Detects anomalies that are rotating backward in the direction of winding or unwinding the cable reel during the movement of the cable , and detects an abnormal rotation that does not rotate the cable reel , and detects an abnormal rotation of the cable reel when the carriage is stopped Rotation abnormality detecting means for performing
An abnormality signal output means for outputting an abnormality signal when an abnormality is detected by the rotation abnormality detection means;
The cart position detection means detects the bending direction from the ground side fixing portion of the cable in the vicinity of the ground side fixing portion of the cable, and the bending direction of the cable from the ground side fixing portion is directed to the front stage side. When detected, the detection result is transmitted to the rotation abnormality detection means, and when it is detected that the bending direction of the cable from the ground side fixing portion of the cable is directed to the rear stage side, the detection result is detected as rotation abnormality. A bending direction detecting means for transmitting to the means;
The rotation abnormality detection unit is configured not to detect the cable reel rotation abnormality during the movement of the movable carriage in a section where the detection of the bending direction by the bending direction detection unit is not detected. Reel cable disconnection prevention device. The cable reel rotation detecting means includes at least two proximity sensors;
A calculation unit that calculates the presence / absence and direction of rotation of the cable reel using detection pulses output from the at least two proximity sensors and transmits the calculation result to the rotation abnormality detection unit; The reel cable disconnection preventing device according to claim 1.   The travel state detection means reads travel control information of a travel control system for remotely traveling control of the mobile carriage, detects the travel state based on the travel control information, and transmits the detection result to the rotation abnormality detection means. The reel cable disconnection preventing device according to claim 1 or 2. The moving carriage is a steel receiving carriage that transports molten steel from the converter provided on the front stage side to the equipment in the lower process,
The rotation abnormality detection means is configured not to detect the cable reel reverse rotation abnormality during the movement of the steel receiving cart at least while the steel receiving cart receives the steel output from the converter, and the rotation abnormality is not detected. 4. The reel cable disconnection prevention device according to claim 1, wherein a non-detection time from the time of receiving a predetermined movement command is lengthened when detecting the movement command. 5.

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