Paying-off tackle

Abstract

The utility model relates to a paying-off tackle which comprises a support (1) and a pulley block rotatably installed in the middle of the support through a center shaft (2), and the pulley block comprises a traction wheel (3) and wire pulleys (4) arranged on the two sides of the traction wheel side by side. Laser range finders (5) emitting laser beams to the support are installed on the two wire pulleys, the support is of a door frame structure, and when the laser range finders rotate along with the wire pulleys, the distance between the laser beams of the laser range finders and the door frame part and the distance between the laser beams of the laser range finders and the spare part change suddenly. By the adoption of the paying-off tackle, data of the wire pulley can be collected in real time and transmitted to a background system, the background system can control a stretching machine to stop working in time after finding abnormal conditions, constructors are informed to check the paying-off tackle and deal with faults, and the safety of the wire laying construction process is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power line stringing construction equipment, in particular to a wire laying pulley. Background Art

[0002] The wire-laying pulley is a machine used in the construction of power transmission lines. It mainly plays the role of supporting the wires in the construction of overhead wires, and smoothly lays the wires to the target position through the wire pulley, thereby reducing the friction of the cable during the wiring process, protecting the cable and speeding up the construction. The wire-laying pulley used in the construction is usually a three-wheel or five-wheel wire-laying pulley with multiple pulleys. The middle pulley is a traction wheel, which is used to pass the guide rope or traction rope connected to the traction machine. The pulleys arranged symmetrically on both sides are wire pulleys. Each wire pulley has a corresponding wire in the chute, which is used to pass the wire connected to the tension machine. The background system controls the tensioning machine including a traction machine and multiple tension machines. A guide rope or traction rope is used to pull multiple wires at the same time through the walking board connected to it for laying. When the walking board passes through the pulley, the walking speed of each wire is the same. When the wire is moving, it will be embedded in the chute of the wire pulley, driving the wire pulley to rotate, so each wire pulley maintains the same speed. However, during the use of each conductor pulley, due to uneven force or force exceeding its allowable load, it may cause faults such as jumping (two conductors jumping into the same chute), pulley overload deformation, partial jamming between pulleys, or bearing damage, causing the conductor pulley to slow down or stop rotating. At this time, the pulley speed is inconsistent with the conductor travel speed, the friction force on the conductor in the chute will increase, wire grinding will occur, and the conductor and pulley will be damaged; when the uneven force on the conductor pulley exceeds a certain limit, the wire-laying pulley often explodes due to excessive force. In severe cases, the conductor will be cut off, causing serious wire-laying accidents and affecting the lives of construction workers.

[0003] For the above reasons, the posture of the cable laying pulley needs to be monitored in real time during the cable laying process. By monitoring the speed and force of the wire pulley of the cable laying pulley, check whether there are abnormal conditions such as the pulley speed slowing down or not turning, jumping grooves, and pulley deformation, so as to promptly notify the construction personnel to shut down the machine to avoid accidents. At present, the monitoring of the state of the cable laying pulley mostly relies on the naked eye observation of the monitoring personnel. This method is easily affected by the weather. In rainy and foggy days, it is difficult for the monitoring personnel to obtain a clear field of vision, resulting in inadequate monitoring. In addition, since the speed and force of the pulley cannot be directly monitored by the naked eye, the accuracy of the monitoring personnel in judging the speed and force is low, and the error is large. When the pulley has not yet experienced obvious abnormalities such as jumping grooves and jamming, but the wire pulley force is already too large, or the speeds of the wire pulleys are inconsistent, it is difficult for the monitoring personnel to detect such abnormalities in time. In addition, when this method detects an abnormality in the pulley, the monitoring personnel also need to notify the construction personnel to shut down the machine separately, and there is a lag in its response. If the monitoring personnel fail to detect the abnormal situation of the conductor pulley in time and notify the construction personnel to shut down the machine in time, the conductor or the wire-laying pulley will be damaged. In serious cases, the pulley will explode due to excessive force and even cut the conductor, causing an accident and affecting the life safety of the construction personnel. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a wire-laying pulley which can collect and transmit the speed data of the wire pulley in real time during the wire laying construction process, so that the background system can more accurately and timely monitor the fault of the wire pulley on the wire-laying pulley, thereby ensuring the safety of the wire laying construction process.

[0005] A wire-laying pulley comprises a bracket and a pulley block rotatably installed in the middle of the bracket through a central axis, wherein the pulley block comprises a traction wheel and a conductor pulley arranged side by side on both sides of the traction wheel; a laser rangefinder for emitting a laser beam toward the bracket is installed on the two conductor pulleys, and the bracket is a door frame structure. When the laser rangefinder follows the rotation of the conductor pulley, there is a sudden change in the distance from the laser beam to the door frame part and the distance to the empty part.

[0006] Preferably, an early warning block protruding toward the laser rangefinder is provided on the inner side of the door frame of the bracket, and the early warning block is slightly deviated from the irradiation point of the laser beam of the laser rangefinder on the bracket in the direction of the center axis. When the wire pulley is overloaded and deformed, the early warning block can block the laser beam emitted by the laser rangefinder.

[0007] Preferably, the warning block deviates from the laser beam irradiation location by a distance of 3-5 mm.

[0008] Preferably, the laser beam emitted by the laser rangefinder is parallel to the central axis direction.

[0009] Preferably, there are two warning blocks located on each side of the bracket, and they are symmetrically distributed along the axis direction of the central axis.

[0010] Preferably, there are more than two laser rangefinders located on the same wire pulley, which are respectively installed at different positions of the same wire pulley.

[0011] Preferably, the bracket is a channel steel bracket.

[0012] Preferably, a signal transceiver for receiving and forwarding the laser rangefinder data signal in a wireless manner is installed on the bracket or the wire pulley.

[0013] Preferably, the signal transceiver is equipped with a Bluetooth transmission module.

[0014] Preferably, an inclination sensor is installed on the bracket, and the inclination sensor measures the inclination angle between the wire-laying pulley and the vertical direction. The inclination angle measurement data of the inclination sensor is received and forwarded through a signal transceiver.

[0015] The technical effects of the utility model are:

[0016] A laser rangefinder is installed in the wire pulley of the wire laying pulley. The cooperation between the laser rangefinder and the bracket of the door frame structure makes the laser rangefinder follow the rotation of the wire pulley, and the distance from the laser beam to the door frame part and the distance to the free part have a sudden change. The distance is measured according to the set time period, and the distance measurement data is transmitted to the background system. The background system establishes the waveform diagrams corresponding to the two wire pulleys according to the transmitted distance measurement data, with the reception time of the distance measurement data as the horizontal coordinate and the distance value of the distance measurement data as the vertical coordinate.

[0017] During the wire deployment process, the wire pulley rotates driven by the wire in its chute, and the laser rangefinders on the two wire pulleys rotate with the wire pulleys. When the laser beam of the laser rangefinder is directed to the bracket, the laser beam will be blocked and reflected by the door frame of the bracket, and the distance between it and the door frame will be measured. The background system forms the high-level part of the rectangular wave in the waveform, and the distance value is the peak value of the rectangular wave; when the laser beam deviates from the bracket, the laser beam is directed to the empty part outside the bracket, and is not blocked and reflected. At this time, the laser rangefinder does not measure the specific distance value, so the distance measurement data return value obtained by the background system is zero, forming the low-level part of the rectangular wave in the waveform. Since the bracket adopts a door frame structure, every time the wire pulley rotates half a circle, the laser beam of the laser rangefinder that rotates accordingly will be emitted to the bracket. Therefore, the time interval between the rising edges of two adjacent rectangular waves in the waveform diagram, or the time interval between the falling edges of two adjacent rectangular waves, is the time taken by the wire pulley corresponding to the waveform diagram to rotate half a circle. The background system calculates the rotation speed of the two wire pulleys based on this time and the half circumference of the wire pulley groove according to the formula: rotation speed = half a circle circumference / half a circle time.

[0018] The background system monitors the difference in the rotation speeds of the two wire pulleys according to a preset range. When the difference between the rotation speeds of the two wire pulleys is within the preset range, the wire travel speeds in the two wire pulley chutes are basically the same, and the two wire pulleys rotate normally, so it can be judged that the wire-releasing pulley is in a normal state, and the background system controls the tensioning machine to continue the wire laying work; when the difference between the rotation speeds of the two wire pulleys exceeds the preset range, that is, one of the wire pulleys slows down or stops rotating due to an abnormal fault, and the rotation speed of the wire pulley is inconsistent with the travel speed of the wire in its chute, so it can be judged that the wire-releasing pulley is in an abnormal state. After the background system finds this situation, it can promptly control the tensioning machine to stop working, and notify the construction personnel to check and troubleshoot the wire pulley on the wire-releasing pulley, and continue to control the tensioning machine after the troubleshooting is completed, thereby preventing the wire pulley from slowing down or not rotating, causing its rotation speed to be inconsistent with the travel speed of the wire in its chute, resulting in excessive friction on the wire and damage to the wire, so that the background system can monitor the fault of the wire-releasing pulley during the wire laying construction process more accurately and timely, thereby ensuring the safety of the wire laying construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a wire-laying pulley provided in an embodiment of the utility model.

[0020] Figure 2 It is a side view of a wire-laying pulley provided in an embodiment of the utility model.

[0021] Figure 3 It is a schematic cross-sectional structural diagram of the upper half of a wire-laying pulley provided in an embodiment of the utility model.

[0022] Figure 4 It is a structural schematic diagram of a wire pulley in an embodiment of the utility model.

[0023] Figure 5 It is a waveform diagram of the measurement data of the laser rangefinder in the embodiment of the utility model.

[0024] Figure 6 It is a schematic cross-sectional structural diagram of a wire-releasing pulley equipped with an early warning block in an embodiment of the utility model when the pulley is normal.

[0025] Figure 7 It is a schematic cross-sectional structural diagram of a wire-releasing pulley equipped with an early warning block when the pulley is deformed in an embodiment of the utility model.

[0026] Figure 8 It is a cross-sectional structural schematic diagram of another implementation manner of the wire-laying pulley in the embodiment of the utility model.

[0027] Fig. 9 It is a structural schematic diagram of another implementation manner of the wire pulley in the embodiment of the utility model.

[0028] Fig.10 It is another structural schematic diagram of the wire-laying pulley in the embodiment of the utility model.

[0029] Fig.11 It is a schematic diagram of the relationship between the inclination angles of the pulley and the walking board in the embodiment of the utility model.

[0030] Markings in the figure: 1- bracket, 2- center axis, 3- traction wheel, 4- conductor pulley, 5- laser rangefinder, 6- early warning block, 7- signal transceiver, 8- inclination sensor, 9- walking board, a- rectangular wave when the laser beam of the laser rangefinder is directed to the bracket, b- rectangular wave when the laser beam of the laser rangefinder is blocked by the early warning block, d1- peak value of rectangular wave a, d2- peak value of rectangular wave b, t- time interval between the rising edge / falling edge of two adjacent rectangular waves, θ1- inclination angle of the wire-paying pulley, θ2- inclination angle of the walking board. DETAILED DESCRIPTION

[0031] The specific embodiments of the utility model are further described in detail below in conjunction with the accompanying drawings. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, horizontal, vertical, counterclockwise, clockwise, radial, axial, etc.), then the directional indications are only used to explain the relative position relationship, movement, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] like Figures 1 to 4 As shown, an embodiment of the utility model provides a wire-laying pulley, comprising a bracket 1, and a pulley group rotatably installed in the middle of the bracket 1 through a central axis 2, wherein the pulley group comprises a traction wheel 3 and a wire pulley 4 arranged side by side on both sides of the traction wheel 3; the two wire pulleys 4 are both equipped with a laser rangefinder 5 for emitting a laser beam to the bracket 1, and the bracket 1 is a door frame structure. When the laser rangefinder 5 follows the rotation of the wire pulley 4, there is a sudden change in the distance to the door frame part and the distance to the remaining part measured by its laser beam.

[0034] refer to Figure 1 and Figure 2 The wire-laying pulley shown in the figure has a bracket 1 of a door frame structure, and the wire-laying pulley is rotatably installed with a pulley block through a central axis 2, and the pulley block includes three pulleys, among which the pulley located in the middle is a traction wheel 3, and a guide rope or a traction rope passes through the slide groove of the traction wheel 3 during the wire stringing construction, and the pulleys located on both sides of the traction wheel 3 and symmetrically arranged side by side are conductor pulleys 4, and during the wire stringing construction, each conductor pulley 4 has a corresponding slide groove in it, so that the conductor passes through the slide groove of the conductor pulley 4.

[0035] like Figure 3 As shown, in this embodiment, the two wire pulleys 4 are both equipped with a laser rangefinder 5 that emits a laser beam to the bracket 1. When the wire pulley 4 rotates, the laser rangefinder 5 can rotate accordingly. Figure 2 In the side view of the wire-laying pulley shown in the figure, the laser rangefinder 5 cooperates with the bracket 1 of the door frame structure, so that when the laser rangefinder 5 follows the rotation of the wire pulley 4, the distance to the door frame part and the distance to the remaining part measured by the laser beam of the laser rangefinder 5 will suddenly change, that is, the laser beam emitted by the laser rangefinder 5 will alternate between being directed toward the bracket 1 and deviating from the bracket 1, thus repeating the cycle. When the laser beam emitted by the laser rangefinder 5 changes from being deviated from the bracket 1 to being directed toward the bracket 1, the distance value measured by the laser rangefinder 5 suddenly changes from the distance to the remaining part to the distance to the bracket 1 of the door frame structure. Since the bracket 1 adopts the following method, Figure 2 and Figure 3The door frame structure shown, therefore, when the laser beam emitted by the laser rangefinder 5 changes from deviating from the bracket 1 to being directed toward the bracket 1 for the next time, it corresponds to the wire pulley 4 rotating half a circle. Accordingly, when the laser beam emitted by the laser rangefinder 5 changes from being directed toward the bracket 1 to being deviated from the bracket 1 twice in a row, that is, the distance value measured by the laser rangefinder 5 suddenly changes from the distance to the door frame structure bracket 1 to the distance to the free part, it corresponds to the wire pulley 4 rotating half a circle.

[0036] In this embodiment, reference Figure 4 , the laser rangefinder 5 can be installed and fixed on the inner rib of the wire pulley 4, so that the length of the laser rangefinder 5 from the center of the wire pulley 4 is greater than the width of the side of the door frame structure bracket 1. Of course, the laser rangefinder 5 can also be installed at other positions on the wire pulley 4, as long as it is ensured that the position where the laser rangefinder 5 is installed can achieve the above-mentioned distance measurement requirements, so that the laser rangefinder 5 rotates with the wire pulley 4, and its laser beam alternates between being directed toward the bracket 1 and deviating from the bracket 1, and there is a sudden change between the distance measured by the laser beam to the door frame part and the distance to the empty part.

[0037] The laser rangefinder 5 described in this embodiment has the characteristics of real-time monitoring and precise measurement, and performs distance measurement by emitting a laser beam. Before using the laser rangefinder 5, it is necessary to set the time period for each laser rangefinder 5 to emit a laser beam for distance measurement to be short enough to achieve millisecond-level accuracy. The shortest time period can be up to 0.4 seconds, ensuring that the laser rangefinder 5 can collect measurement data in real time and avoid missed data detection. A sufficiently short time period can ensure that when the distance measurement data forms a waveform diagram in the background system, its waveform is close to a continuous rectangular wave, which is conducive to the background system in the above-mentioned monitoring method to more accurately determine the time corresponding to the rising edge / falling edge of the waveform. Preferably, the time period for distance measurement by the laser rangefinder 5 is 0.4-0.8 seconds.

[0038] During the conductor deployment construction process, the conductor pulley 4 rotates driven by the conductor in its slideway, and the laser rangefinders 5 on the two conductor pulleys 4 measure the distance according to the set time period, and transmit the distance measurement data to the background system. Among them, the background system can use the Internet of Things to realize the reception of measurement data and the control of the working state of the tensioning machine, or other methods can be used, which is not limited in this embodiment. The receiving carrier of the background system can be an industrial computer, a computer, etc., which are well known to everyone in life, and will not be described in detail here. As long as the function of controlling the tensioning machine and receiving the measurement data can be realized in the utility model, it is ensured that the fault of the conductor pulley 4 on the wire-laying pulley can be accurately and timely monitored.

[0039] Since the side of the wire pulley 4 is relatively parallel to the side of the bracket 1, the distance measured by the laser rangefinder 5 during the rotation of the wire pulley 4 is basically consistent. The background system establishes waveform diagrams corresponding to the two wire pulleys 4 based on the transmitted distance measurement data, with the reception time of the distance measurement data as the horizontal coordinate and the distance value of the distance measurement data as the vertical coordinate. The high level part of the waveform diagram maintains the same peak value to form a rectangular wave, such as Figure 5 shown.

[0040] When the laser rangefinder 5 rotates with the wire pulley 4, the laser beam it emits will alternate between being directed toward the bracket 1 and being deviated from the bracket 1; when the laser beam is directed toward the bracket 1, it will be blocked and reflected by the door frame of the bracket 1, and the laser beam measures the distance to the door frame of the bracket 1. The distance measurement data is transmitted to the background system, forming the high level part of the rectangular wave in the waveform diagram. The distance value is the peak value of the rectangular wave, that is, the corresponding Figure 5 The peak value d1 of the high level part of the rectangular wave a in the waveform; when the laser beam deviates from the bracket 1, the laser beam is directed to the empty part outside the bracket 1 and is not blocked and reflected. At this time, the laser rangefinder 5 does not measure a specific distance value, so the distance measurement data return value obtained by the background system is zero, forming the low level part of the rectangular wave in the waveform, which corresponds to Figure 5 The low level part of rectangular wave a in the waveform.

[0041] The background system calculates the rotational speed of the two wire pulleys 4 according to the following formula based on the established waveform diagram of the two wire pulleys 4: rotational speed = half-circle circumference / half-circle time; wherein, half-circle circumference is half-circle length of the guide groove of the wire pulley 4, and half-circle time is the time interval between the rising edge / falling edge of two adjacent rectangular waves in the waveform diagram.

[0042] Since the bracket 1 adopts a door frame structure, when the wire pulley 4 rotates half a circle, the laser beam of the laser rangefinder 5 that rotates accordingly will be emitted to the bracket 1. Therefore, the time interval between the rising edges of two adjacent rectangular waves in the waveform diagram, or the time interval between the falling edges of two adjacent rectangular waves, is the time taken by the wire pulley 4 corresponding to the waveform diagram to rotate half a circle. Figure 5 , the time t between two adjacent rising edges of the peak value d1 in the rectangular wave a is the time taken by the corresponding wire pulley 4 to rotate half a circle, which is the half-circle time required in the formula. Of course, the half-circle time can also be Figure 5 The time interval between the falling edges of two adjacent rectangular waves a in the figure is the time interval between the falling edges of the two adjacent rectangular waves a. The half-circle time obtained in this way is also the time taken for the corresponding wire pulley 4 to rotate half a circle. The background system calculates the rotation speed of the two wire pulleys 4 according to the above formula based on the obtained time t and the half circumference of the guide groove of the wire pulley 4.

[0043] The background system compares the difference in rotational speed of the two wire pulleys 4 with a preset range to determine whether the rotational speeds of the two wire pulleys 4 are substantially consistent, wherein the preset range needs to be set in advance in the background system, and the preset range is used to reduce the situation where the background system falsely reports a fault due to a slight difference in rotational speed of the two wire pulleys 4, and the specific numerical range is not limited in this solution. When the difference in the rotational speeds of the two wire pulleys 4 is within a preset range, the wire travel speeds in the chutes of the two wire pulleys 4 are basically the same, and the two wire pulleys 4 rotate normally, it can be judged that the wire-releasing pulley is in a normal state, and the background system controls the tensioning machine to continue the wire laying work; when the difference in the rotational speeds of the two wire pulleys 4 exceeds the preset range, that is, one of the wire pulleys 4 causes its rotation speed to slow down or stop due to an abnormal fault, at this time, the rotation speed of the wire pulley 4 is inconsistent with the travel speed of the wire in its chute, it can be judged that the wire-releasing pulley is in an abnormal state. After the background system finds this situation, it can promptly control the tensioning machine to stop working, and notify the construction personnel to check and handle the fault of the wire pulley 4 on the wire-releasing pulley, and continue to control the tensioning machine after the handling is completed, thereby preventing the wire pulley 4 from slowing down or not rotating, causing its rotation speed to be inconsistent with the travel speed of the wire in its chute, resulting in excessive friction on the wire and damage to the wire, so that the background system can monitor the fault of the wire-releasing pulley during the wire laying construction process more accurately and timely, thereby ensuring the safety of the wire laying construction process.

[0044] The power supply method of the laser rangefinder 5 is not specifically limited in this solution. Optionally, the laser rangefinder 5 can be powered by a built-in battery, and a generator charging device can also be installed on the line-laying pulley, which converts the mechanical energy brought by the rotation of the pulley block on the line-laying pulley into electrical energy to charge the built-in battery. The use of this structure can reduce the frequent disassembly of the line-laying pulley to replace the battery due to battery failure, making the configuration more convenient and reasonable. Of course, the power supply method for the laser rangefinder 5 in this solution can also be other, as long as it can power the laser rangefinder 5 and ensure its normal operation.

[0045] As a further improvement of this embodiment, Figure 6 and Figure 7 As shown, an early warning block 6 protruding toward the laser rangefinder 5 is provided on the inner side of the door frame of the bracket 1, and the early warning block 6 slightly deviates from the irradiation position of the laser beam of the laser rangefinder 5 on the bracket 1 in the direction of the central axis 2. When the wire pulley 4 is overloaded and deformed, the early warning block 6 can block the laser beam emitted by the laser rangefinder 5. When the wire pulley 4 is unevenly stressed or the stress exceeds its allowable load, the wire pulley 4 will be overloaded and deformed, and the outer periphery of its chute will be radially offset, resulting in damage to the wire-releasing pulley. Therefore, the early warning block 6 on the inner side of the door frame of the bracket 1 cooperates with the laser rangefinder 5 to accurately and timely monitor the deformation of the wire pulley 4.

[0046] When setting the warning block 6, refer to Figure 6 and Figure 7 According to the allowable load and force characteristics of the wire pulley 4, the position of the warning block 6 installed on the inner side of the door frame structure of the bracket 1 is determined so that it is slightly deviated from the laser beam irradiation point in the direction of the central axis 2 to ensure that the wire pulley 4 is in a normal state. Figure 6 As shown, the laser beam emitted by the laser rangefinder 5 can reach the door frame portion of the bracket 1 without being blocked by the warning block 6; after the wire pulley 4 is deformed, as shown in FIG. Figure 7 As shown, the laser rangefinder 5 is radially offset inward along with the deformed wire pulley 4, and at this time, the warning block 6 can block the laser beam emitted by the laser rangefinder 5. The warning block 6 has a certain thickness, and the specific thickness is not limited in this solution, as long as the distance between the laser rangefinder 5 and the warning block 6 is less than the distance between the laser rangefinder 5 and the door frame part of the bracket 1.

[0047] During the wire laying process, the laser rangefinder 5 rotates with the wire pulley 4. When the wire pulley 4 is in a normal state, Figure 6 As shown, the wire pulley 4 is not deformed, and the laser beam of the laser rangefinder 5 will not be blocked by the warning block 6 when it is directed to the door frame part of the bracket 1. At this time, the distance measured by the laser rangefinder 5 is the distance between the laser rangefinder 5 and the door frame part of the bracket 1; when the wire pulley 4 is deformed due to exceeding its allowable load, as shown in FIG. Figure 7 As shown, the laser rangefinder 5 on the wire pulley 4 is shifted in the deformation direction, i.e. radially. When the laser beam of the laser rangefinder 5 is directed toward the bracket 1, it will be blocked by the warning block 6. At this time, the distance measured by the laser rangefinder 5 is the distance between the laser rangefinder 5 and the warning block 6.

[0048] The ranging data is transmitted to the background system. The background system establishes waveform diagrams corresponding to the two wire pulleys 4 according to the transmitted ranging data, with the receiving time of the ranging data as the horizontal axis and the distance value of the ranging data as the vertical axis. The waveform diagrams refer to Figure 5 . After establishing the waveform diagram, the background system stores the peak value of the first rectangular wave in the waveform diagram of the two wire pulleys 4. Among them, the peak value d1 of the first rectangular wave a is the distance between the laser rangefinder 5 and the door frame part of the bracket 1 when the corresponding wire pulley 4 is under normal stress. The background system uses this peak value as a reference value for subsequent comparison. Afterwards, the background system compares the peak value of the rectangular wave in the waveform diagram with the first peak value, specifically calculating the difference between the peak value of the rectangular wave obtained each time in each waveform diagram and the first peak value stored, and comparing the difference with the preset range to monitor the stress condition of the wire pulley 4, wherein the preset range needs to be set in advance in the background system, and the preset range is used to reduce the situation where the background system falsely reports a fault due to only a slight difference between the two peak values, and its specific numerical range is not limited in this scheme.

[0049] refer to Figure 5 , when the difference between the peak value of the rectangular wave and the first peak value is within the preset range, that is, the peak value of the rectangular wave a in the figure remains at d1, and the difference is basically maintained at a small value and within the preset range, the laser beam can be directed to the door frame part of the bracket 1 without being blocked by the warning block 6, such as Figure 6 As shown, the background system determines that the wire pulley 4 corresponding to the waveform diagram is normally stressed and not deformed, and the background system controls the tensioning machine to continue the wire deployment work; when the difference between the peak value of the rectangular wave and the first peak value exceeds the preset range, that is, the rectangular wave in the figure will change from the shape of a to the shape of b shown by the dotted line, and the peak value will change from d1 to d2. Since d2 is obviously smaller than the first peak value d1, the difference will change greatly, causing it to exceed the preset range. At this time, the laser beam is blocked by the warning block 6, as shown in FIG. Figure 7 As shown, the background system determines that the conductor pulley 4 corresponding to the waveform diagram is abnormally stressed, promptly controls the tensioning machine to stop working, and notifies the construction personnel to check and confirm whether the corresponding conductor pulley 4 on the wire-releasing pulley is in a deformed state due to the force exceeding the allowable load, so as to avoid the conductor pulley 4 continuing to work in a deformed state and causing damage to the wire-releasing pulley and the conductor. This allows the background system to monitor the stress condition of the conductor pulley 4 more accurately and timely during the construction process, thereby ensuring the safety of the construction process.

[0050] Preferably, the distance between the warning block 6 and the laser beam irradiation point in this embodiment is 3-5 mm. Setting this distance can not only enable the background system to accurately monitor the deformation of the wire pulley 4, but also reduce the situation where the normal slight deformation of the wire pulley 4 caused by external disturbance or misoperation causes the background system to falsely report a fault, thereby improving the accuracy of the background system's monitoring of the wire pulley.

[0051] Preferably, Figure 3 As shown, the laser beam emitted by the laser rangefinder 5 is parallel to the direction of the central axis 2. This installation structure ensures that during the rotation of the wire pulley 4, the laser beam emitted by the laser rangefinder 5 is perpendicular to the side of the bracket 1, so that the distance value measured by the laser rangefinder 5 is closer to the distance between the wire pulley 4 and the side of the bracket 1, which is convenient for setting the position of the early warning block 6 away from the laser beam irradiation position, reducing the measurement error, and facilitating the direct reading of the distance between the wire pulley 4 and the side of the bracket 1 from the background system.

[0052] Preferably, Figure 8 As shown, the number of the warning blocks 6 located on each side of the bracket 1 is two, and they are symmetrically distributed along the axis direction of the central axis 2. With this installation structure, when the wire pulley 4 is deformed to cause the laser rangefinder 5 to deviate radially inward, the distance data measured by the laser rangefinder 5 every half a circle is the distance between the laser rangefinder 5 and the warning block 6, ensuring that the obtained measurement data is unified. Figure 5As shown, the peak value of the formed rectangular wave b is kept at d2, which is convenient for the background system to analyze and process the data.

[0053] Preferably, there are two or more laser rangefinders 5 located on the same wire pulley 4, which are respectively installed at different positions of the same wire pulley 4. Fig. 9 As shown, in this embodiment, two laser rangefinders 5 in different orientations are installed on the wire pulley 4. Of course, the number of laser rangefinders 5 can also be other, and the specific orientation of the installation can be set according to the actual situation, as long as it is ensured that when each installed laser rangefinder 5 rotates with the wire pulley 4, its laser beam measures a sudden change in the distance to the door frame part and the distance to the empty part. Other laser rangefinders 5 are installed at other different orientations of the wire pulley 4, and cooperate with the early warning block 6. The measurement data of each laser rangefinder 5 is transmitted to the background system, so that the background system forms multiple waveforms corresponding to one wire pulley 4 and monitors it, which can more accurately monitor the deformation of the wire pulley 4 in different directions, avoid the background system from missing the deformation of the wire pulley 4 in a certain direction, and further ensure the construction safety.

[0054] Preferably, the bracket 1 in this embodiment is a channel steel bracket. Channel steel is a long steel strip with a groove-shaped cross section. Since its cross section is groove-shaped, the channel steel bracket with this structure has the characteristics of simple structure and light weight, and is easy to process, transport and install during construction, with low cost. The channel steel bracket also has the characteristics of high strength, high rigidity and corrosion resistance, and can withstand large load external forces, extend the service life of the wire pulley, and further improve the safety of construction.

[0055] As a further improvement of this embodiment, a signal transceiver 7 capable of receiving and forwarding data signals of the laser rangefinder 5 is installed on the bracket 1 or the wire pulley 4. The specific installation position of the signal transceiver 7 in this embodiment can be referred to Figure 1 and Figure 2 As shown, the signal transceiver 7 is installed at the position where the bracket 1 is connected to the central axis 2. Of course, the signal transceiver 7 can also be installed at other positions of the bracket 1, or on the wire pulley 4, as long as the functions of receiving and forwarding can be realized. In order to make the monitored data more accurate, the measurement data signal of the laser rangefinder 5 can be received by the signal transceiver 7, and the collected data signal can be amplified and processed in the signal transceiver 7, and then transmitted to the background system in real time, so that the data received by the background system is clear and accurate enough to ensure that its monitoring work on the wire pulley is accurate and timely. In this embodiment, the specific internal structure of the signal transceiver 7 is not limited, as long as the above functions can be realized.

[0056] In the embodiment of the utility model, the laser rangefinder 5 and the signal transceiver 7 transmit data by wireless means, wherein the wireless means can specifically be to transmit data by means of WIFI, Bluetooth, wireless network, 4G or 5G mobile network, etc., as long as each measurement signal can be accurately transmitted in the utility model. Preferably, the signal transceiver 7 is equipped with a Bluetooth transmission module, and the signal transceiver 7 receives and forwards the data signal of the laser rangefinder 5 by Bluetooth transmission. The Bluetooth method is applicable to a large number of devices, and the cost and power consumption are low. Therefore, the Bluetooth transmission module can be uniformly installed and used in each laser rangefinder 5, reducing the production cost of the line-laying pulley, ensuring that the transmission mode of each laser rangefinder 5 is consistent, and reducing the power consumption of the device, and extending the service life of the built-in battery of the device. In addition, since the Bluetooth method has strong security and anti-interference ability, it can ensure high transmission quality and efficiency. Therefore, the use of the Bluetooth method in the utility model can effectively reduce the signal interference between the laser rangefinders 5, as well as the signal interference from other communication devices in the construction environment, improve the accuracy and timeliness of the data, and is suitable for complex line construction environments.

[0057] As another improvement of this embodiment, Fig.10 As shown, a tilt sensor 8 is installed on the bracket 1 of the wire-laying pulley, and the tilt sensor 8 measures the tilt angle between the wire-laying pulley and the vertical direction. The tilt angle measurement data of the tilt sensor 8 is received and forwarded through the signal transceiver 7. When the wire-laying pulley is used as a corner pulley, Fig.11 As shown, both the wire-laying pulley and the walking board 9 need to have a certain inclination angle with the vertical direction. When in use, it is necessary to ensure that the inclination angle θ1 of the wire-laying pulley is consistent with the inclination angle θ2 of the walking board 9, so that the walking board 9 can pass through the wire-laying pulley and the wire pulled by it can fall on the corresponding wire pulley 4. In order to more accurately monitor the inclination of the pulley, an inclination sensor 8 can be installed on the bracket 1 of the wire-laying pulley. The inclination sensor 8 is used to measure the inclination angle θ1 of the wire-laying pulley in real time. The inclination data is received by the signal transceiver 7, amplified and forwarded to the background system, so that the background system can accurately monitor the inclination of the wire-laying pulley.

[0058] The background system compares the received inclination angle θ1 of the wire-laying pulley with the pre-stored inclination angle θ2 of the board 9, specifically, calculates the difference between the two inclination angles, and compares the difference with the preset range. When the wire-laying pulley is in a normal state, the inclination angle θ1 of the wire-laying pulley is basically consistent with the inclination angle θ2 of the board 9, and the difference is within the preset range at this time, and the background system controls the tensioning machine to continue working; when the wire-laying pulley is offset, so that the inclination angle θ1 of the wire-laying pulley and the inclination angle θ2 of the board 9 are greatly different, at this time the difference will exceed the preset range, and the background system determines that the wire-laying pulley is abnormally overturned, and can timely control the tensioning machine to stop, and notify the construction personnel to check and troubleshoot the inclination angle of the wire-laying pulley, so as to avoid the situation where the board 9 cannot pass through the wire-laying pulley due to the inconsistency between the inclination angle θ1 of the wire-laying pulley and the inclination angle θ2 of the board 9, so as to make the monitoring of the inclination angle more accurate and timely, improve the construction efficiency, and prevent the board 9 from overturning due to inconsistent inclination angles and causing accidents, so as to ensure the safety of the construction process.

[0059] In this embodiment, the specific installation position and internal structure of the inclination sensor 8 are not limited. The inclination sensor 8 can refer to Fig.10 The position of the bracket 1 can be installed on the side of the bracket 1, or it can be installed at other positions as long as the above functions can be achieved.

[0060] The power supply method of the inclination sensor 8 is not specifically limited in this solution. Optionally, the inclination sensor 8 can be powered by a built-in battery, and a generator charging device can also be installed on the wire-laying pulley, and the charging device converts the mechanical energy brought by the rotation of the pulley block on the wire-laying pulley into electrical energy to charge the built-in battery. With this structure, the operation of frequently replacing the battery of the inclination sensor 8 due to battery exhaustion can be reduced, making the configuration more convenient and reasonable. Of course, the power supply method of the inclination sensor 8 in this solution can also be other, as long as it can power the inclination sensor 8 and ensure its normal operation.

[0061] In the embodiment of the utility model, the data transmission mode of the inclination sensor 8 can be a common wireless mode. Preferably, the data transmission mode of the inclination sensor 8 is specifically a Bluetooth transmission mode. The use of Bluetooth can reduce the power consumption of the inclination sensor 8, extend the service life of its built-in battery, and effectively reduce the signal interference between the inclination sensor 8 and other laser rangefinders 5, as well as the signal interference from other communication devices in the construction environment, improve the accuracy and timeliness of the data, and is suitable for complex wiring construction environments.

[0062] The signal connection method between the background system and the laser rangefinder 5, the signal transceiver 7 and the inclination sensor 8 can be connected using various commonly used wireless methods, such as WIFI, Bluetooth, wireless network, etc., or other methods, which are not specifically limited in this embodiment.

[0063] The above are only some embodiments of the utility model, and the protection scope of the utility model patent is not limited thereto. Those skilled in the art can make non-substantial changes or substitutions based on the utility model, which still fall within the protection scope of the utility model patent.

Claims

1. A wire-laying pulley, comprising a bracket (1), and a pulley block rotatably mounted in the middle of the bracket (1) via a central axis (2), the pulley block comprising a traction wheel (3) and a conductor pulley (4) arranged side by side on both sides of the traction wheel (3); characterized in that: The two wire pulleys (4) are each equipped with a laser rangefinder (5) for emitting a laser beam towards the bracket (1); the bracket (1) is a door frame structure; when the laser rangefinder (5) follows the rotation of the wire pulley (4), the distance between the laser beam of the laser rangefinder (5) and the door frame portion and the distance to the remaining portion change suddenly.

2. The wire-laying pulley according to claim 1, characterized in that: An early warning block (6) protruding in the direction of the laser rangefinder (5) is arranged on the inner side of the door frame of the bracket (1); the early warning block (6) is slightly deviated from the irradiation position of the laser beam of the laser rangefinder (5) on the bracket (1) in the direction of the central axis (2); when the wire pulley (4) is overloaded and deformed, the early warning block (6) can block the laser beam emitted by the laser rangefinder (5).

3. The wire-laying pulley according to claim 2, characterized in that: The distance between the warning block (6) and the laser beam irradiation point is 3-5 mm.

4. The wire-laying pulley according to claim 2, characterized in that: The laser beam emitted by the laser rangefinder (5) is parallel to the direction of the central axis (2).

5. The wire-laying pulley according to claim 2, characterized in that: The number of the early warning blocks (6) located on each side of the bracket (1) is two, and they are symmetrically distributed along the axial direction of the central axis (2).

6. The wire-laying pulley according to claim 2, characterized in that: The number of laser rangefinders (5) installed on the same wire pulley (4) is more than two, and they are respectively installed at different positions of the same wire pulley (4).

7. The wire-laying block according to any one of claims 1 to 6, characterized in that: The bracket (1) is a channel steel bracket.

8. The wire-laying block according to any one of claims 1 to 6, characterized in that: The support (1) or the wire pulley (4) is provided with a signal transceiver (7) for receiving and forwarding data signals of the laser rangefinder (5) in a wireless manner.

9. The wire-laying pulley according to claim 8, characterized in that: The signal transceiver (7) is equipped with a Bluetooth transmission module.

10. The wire-laying pulley according to claim 8, characterized in that: An inclination sensor (8) is installed on the bracket (1), and the inclination sensor (8) measures the inclination angle between the wire-laying pulley and the vertical direction. The inclination angle measurement data of the inclination sensor (8) is received and forwarded via the signal transceiver (7).

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