A travel monitoring method and device for a steel wire rope tension automatic balancing suspension device

Abstract

The present invention provides a travel monitoring device for an automatic balancing suspension device for wire rope tension, including a plurality of automatic balancing suspension devices for wire rope tension, each of which includes a hydraulic cylinder, a displacement sensor is arranged in the hydraulic cylinder, and the displacement sensor can monitor the displacement adjustment amount of the automatic balancing suspension device for wire rope tension. The present invention provides a travel monitoring method for an automatic balancing suspension device for wire rope tension, the displacement sensor transmits a displacement signal of a piston rod to a remote terminal through a signal transmitter, the remote terminal processes the received displacement signals to obtain the piston rod travel value and analyzes it, thereby determining whether the hydraulic cylinder has loose rope, stuck cylinder, leaking fluid, and unadjustable tension, and performing alarm and display. Based on the mutual cooperation of the above devices and methods, the stability, safety and efficiency of the travel monitoring device for the automatic balancing suspension device for wire rope tension are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of automatic wire rope tension balancing suspension devices, in particular to a travel monitoring method and device for automatic wire rope tension balancing suspension devices. Background Art

[0002] At present, the multi-rope lifting containers in coal mines basically use hydraulic automatic balancing suspension devices to achieve automatic balance of wire rope tension. The hydraulic automatic balancing device achieves pressure balance by connecting different hydraulic cylinder cavities. When the length of the wire rope changes, the force of the connected hydraulic cylinder changes at the same time, and the flow of hydraulic medium between different cavities enables the balancing device to regain balance. However, while the hydraulic balancing device has the advantage of automatic balancing, it often leaks oil, loose ropes, stuck cylinders, and unadjustable tension, which affects the safety of coal mines.

[0003] At present, the market often installs a displacement sensor on the wire rope tension automatic balancing suspension device to monitor the stroke of the piston rod in the hydraulic cylinder, so as to determine whether the tension adjustment function of the device can be used normally. However, with the increase in the use time and frequency of the wire rope tension automatic balancing suspension device and the influence of environmental factors, the wire rope tension automatic balancing suspension device often has a variety of abnormal conditions during use. If these abnormal conditions cannot be effectively identified, the working efficiency of the device will be reduced and the labor cost for maintenance will be greatly increased. Therefore, how to effectively judge these abnormal conditions to ensure the normal operation and maintenance of the wire rope tension automatic balancing suspension device in the later stage is a problem that still needs to be solved. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a travel monitoring method and device for a wire rope tension automatic balancing suspension device.

[0005] The present invention solves the technical problem by adopting the following technical solutions:

[0006] The present invention provides a travel monitoring device for a wire rope tension automatic balancing suspension device, comprising a connecting plate and a plurality of wire rope tension automatic balancing suspension devices, wherein a plurality of wire ropes are connected to the connecting plate through the plurality of wire rope tension automatic balancing suspension devices, each of the wire rope tension automatic balancing suspension devices comprises a hydraulic cylinder, a displacement sensor is arranged in the hydraulic cylinder, the displacement sensor comprises a fixedly connected signal end and a probe end, and the displacement sensor can monitor the displacement adjustment amount of the wire rope tension automatic balancing suspension device.

[0007] Preferably, the hydraulic cylinder includes a cylinder barrel and a piston rod, a signal end of a displacement sensor is embedded in the bottom of the cylinder barrel, the piston rod is a hollow structure and an annular groove is provided on the bottom end face of the piston rod, a magnetic ring is fixed in the annular groove, a magnetic isolation gasket is provided between the magnetic ring and the bottom end face of the annular groove, and the probe end of the displacement sensor passes through the magnetic ring and is provided in the hollow structure.

[0008] Preferably, a signal transmission line is led out from the signal end, the signal transmission line is led out to the outside of the hydraulic cylinder through the bottom of the cylinder barrel and is connected to a signal transmitter through a signal collector. The signal transmitter is fixed to the outside of the hydraulic cylinder. The signal transmitter is used to send sensor monitoring data to a remote terminal, and the remote terminal is connected to an alarm.

[0009] Preferably, the wire rope tension automatic balancing suspension device also includes a middle plate, a side plate and a reversing fork, the middle plate is connected to a wedge-shaped rope ring through a first connecting pin, the side plates are arranged on both sides of the middle plate, and the middle plate and the side plates are provided with limiting grooves matching the hydraulic cylinder, the hydraulic cylinder is arranged in the limiting groove, the bottom of the cylinder barrel of the hydraulic cylinder is fixedly connected to the side plate through a pressure plate, the top of the piston rod of the hydraulic cylinder is connected to the groove surface of the limiting groove at the bottom of the middle plate, one end of the reversing fork is connected to the bottom of the side plate through a second connecting pin, and the other end is fixedly connected to the connecting plate, and a sling is connected under the connecting plate.

[0010] The present invention provides a travel monitoring method for a wire rope tension automatic balancing suspension device, comprising the following steps:

[0011] (1) Each of the displacement sensors measures the stroke of each piston rod and sends the displacement signal to the signal transmitter;

[0012] (2) The signal transmitter sends the displacement signal to the remote terminal;

[0013] (3) The remote terminal processes the received displacement signals to obtain the piston rod stroke value and analyzes it to determine whether the hydraulic cylinder has loose rope, stuck cylinder, leakage, or unadjustable tension;

[0014] (4) The remote terminal displays the stroke of each piston rod. If the hydraulic cylinder is judged to be operating abnormally, the control alarm will sound.

[0015] Preferably, the displacement sensor transmits the displacement signal of the piston rod to the remote terminal once every 10 ms via the signal transmitter.

[0016] Preferably, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder has a loose rope phenomenon are specifically as follows:

[0017] (1) The remote terminal records the piston rod stroke value received each time;

[0018] (2) The remote terminal compares the stroke value obtained each time with the value recorded last time to determine the increase or decrease status of the piston rod stroke;

[0019] (3) If the stroke volume increases continuously for a number of times greater than the preset value in the remote terminal, it is determined that a loose rope event has occurred and the alarm will sound.

[0020] Preferably, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder has leakage are as follows:

[0021] (1) The remote terminal records the piston rod stroke value received each time;

[0022] (2) The remote terminal compares the piston rod stroke value received each time with the value recorded last time, and calculates the increase or decrease in the current piston rod stroke;

[0023] (3) Add the increase and decrease in the stroke of each piston rod in a single stroke and determine whether it is 0.

[0024] (4) If the sum of the increase and decrease in the stroke of each piston rod is not 0, it is determined that a leakage event has occurred and the alarm will sound.

[0025] Preferably, the data analysis steps for the remote terminal to determine whether the tension of the hydraulic cylinder cannot be adjusted are as follows:

[0026] (1) The maximum and minimum strokes allowed by the piston rod are preset in the remote terminal;

[0027] (2) Compare the received piston rod stroke value with the preset value;

[0028] (3) If the piston rod stroke reaches the preset value, it is judged that the tension cannot be adjusted and the alarm goes off.

[0029] Preferably, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder is stuck are as follows:

[0030] (1) The remote terminal has a preset maximum time value for the piston rod stroke to remain unchanged;

[0031] (2) The remote terminal records the piston rod stroke value received each time;

[0032] (3) Compare the piston rod stroke value received each time with the value recorded last time to determine whether there is a change;

[0033] (4) Compare the time value during which the travel amount value remains unchanged during the continuous time with the preset value;

[0034] (5) If the time value reaches the preset value, it is judged that a cylinder jam has occurred and the alarm will sound.

[0035] The advantages and positive effects of the present invention are:

[0036] (1) The method and device provided by the present invention can monitor and judge various abnormal conditions (leakage, loose rope, cylinder jam, and unadjustable tension) of the wire rope tension automatic balancing suspension device, so that the staff can find the problem more timely and conduct effective debugging, thereby improving work efficiency and reducing labor costs.

[0037] (2) The method and device provided by the present invention can achieve multiple monitoring effects by only using one displacement sensor, thereby reducing the manufacturing cost and use cost of the travel monitoring device of the wire rope tension automatic balancing suspension device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure when the present invention is used;

[0039] Figure 2 It is a schematic diagram of the structure inside the hydraulic cylinder of the present invention;

[0040] Figure 3 It is a structural schematic diagram of the automatic balancing suspension device for wire rope tension of the present invention;

[0041] Figure 4 It is a structural schematic diagram of the sling of the present invention;

[0042] Figure 5 is a flow chart of a method for determining a loose rope event according to the present invention;

[0043] Figure 6 is a flow chart of a method for determining a liquid leakage event according to the present invention;

[0044] Figure 7 is a flow chart of a method for determining an event in which tension cannot be adjusted according to the present invention;

[0045] Figure 8 It is a flow chart of the method for judging a cylinder stuck event of the present invention.

[0046] In the figure: 1. Automatic balancing suspension device for wire rope tension; 2. Connecting plate; 3. Hydraulic cylinder; 4. Displacement sensor; 5. Pressure sensor; 6. First connecting pipe; 7. Second connecting pipe; 8. Valve; 9. Lifting device; 10. Arc-shaped pressure block;

[0047] 11. middle plate; 12. side plate; 13. reversing fork; 14. first connecting pin; 15. wedge-shaped rope ring; 16. pressing plate; 17. limiting groove; 18. second connecting pin;

[0048] 31. Cylinder barrel; 32. Piston rod; 33. Annular groove;

[0049] 41. signal end; 42. probe end; 43. magnetic ring; 44. magnetic isolation gasket; 45. signal transmission line;

[0050] 81. third fixing plate; 82. fourth fixing plate; 83. second threaded fixing hole;

[0051] 91. Connecting frame; 92. First opening and closing plate; 93. Second opening and closing plate; 94. First fixing plate; 95. Second fixing plate; 96. First threaded fixing hole; 97. Weight reduction hole; 98. First connecting hole; 99. Third connecting hole. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0053] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a travel monitoring device for a wire rope tension automatic balancing suspension device, including a connecting plate 2 and a plurality of wire rope tension automatic balancing suspension devices 1, a plurality of wire ropes are connected to the connecting plate 2 through the plurality of wire rope tension automatic balancing suspension devices 1, each of the wire rope tension automatic balancing suspension devices 1 includes a hydraulic cylinder 3, a displacement sensor 4 is arranged in the hydraulic cylinder 3, the displacement sensor 4 includes a fixedly connected signal end 41 and a probe end 42, and the displacement sensor 4 can monitor the displacement adjustment amount of the wire rope tension automatic balancing suspension device 1. It should be supplemented that the displacement sensor 4 is a magnetostrictive liquid level sensor, and the magnetostrictive liquid level sensor adopts a non-contact measurement method, so that it is not easily affected by the medium in the hydraulic cylinder 3, thereby improving the stability of the measurement.

[0054] Specifically, there are several steel wire ropes connected to the connecting plate 2 through several steel wire rope tension automatic balancing suspension devices 1, each steel wire rope is respectively connected to a corresponding steel wire rope tension automatic balancing suspension device 1, and a container to be lifted is hoisted below the connecting plate 2. The steel wire rope tension automatic balancing suspension device 1 is used to adjust the tension of the steel wire ropes connected thereto through the telescopic movement of the internal hydraulic cylinder 3, so that the tension of each steel wire rope is kept consistent after adjustment, thereby keeping the end face of the container to be lifted in a horizontal state, thereby stably lifting. It should be added that the number of the steel wire ropes and the steel wire rope tension automatic balancing suspension devices 1 should be selected according to the actual application situation.

[0055] Furthermore, if Figure 1 , Figure 2 , Figure 3As shown, the hydraulic cylinder 3 includes a cylinder barrel 31 and a piston rod 32, the bottom of the cylinder barrel 31 is embedded with a signal end 41 of a displacement sensor 4, the piston rod 32 is a hollow structure and the bottom end face of the piston rod 32 is provided with an annular groove 33, a magnetic ring 43 is fixed in the annular groove 33, a magnetic isolation gasket 44 is provided between the magnetic ring 43 and the bottom end face of the annular groove 33, and the probe end 42 of the displacement sensor 4 passes through the magnetic ring 43 and is provided in the hollow structure. The magnetic isolation gasket 44 is used to separate the magnetic ring 43 from the piston rod 32 to prevent magnetic leakage and other events, thereby improving the stability of the measurement.

[0056] Furthermore, if Figure 1 , Figure 2 , Figure 3 As shown, a signal transmission line 45 is led out from the signal end 41, and the signal transmission line 45 is led out to the outside of the hydraulic cylinder 3 through the bottom of the cylinder barrel 31 and connected to the signal transmitter through a signal collector. The signal transmitter is fixed to the outside of the hydraulic cylinder 3. The signal collector is used to collect the analog signal sent by the signal transmission line 45 and send the analog signal to the signal transmitter. The signal transmitter is used to send the received signal to a remote terminal, and the remote terminal is connected to an alarm. It should be supplemented that a sealing device is provided at the connection between the signal transmission line 45 and the bottom of the cylinder barrel 31. The sealing device can be a sealing ring, and other sealing structures can be selected according to actual conditions to prevent the hydraulic cylinder 3 from leaking. And the signal transmission lines 45 in the several wire rope tension automatic balancing suspension devices 1 are all connected to the same signal transmitter through a signal collector.

[0057] In one embodiment of the present invention, the piston rod 32 can drive the magnetic ring 43 to reciprocate outside the probe end 42 of the displacement sensor 4. The probe end 42 generates a corresponding pulse signal according to the displacement of the magnetic ring 43 based on the principle of magnetostriction measurement, and transmits the pulse signal to the signal end 41. A detection circuit is arranged in the signal end 41. The detection circuit can determine the displacement of the magnetic ring 43 by analyzing and calculating the pulse signal. Then, the detection circuit transmits the displacement signal to the signal transmitter through the signal collector. The signal transmitter can transmit the displacement signal to the remote terminal through wireless transmission for real-time viewing by the staff.

[0058] Furthermore, if Figure 1 , Figure 3 , Figure 4As shown, the wire rope tension automatic balancing suspension device 1 also includes a middle plate 11, a side plate 12 and a reversing fork 13. The middle plate 11 is connected to a wedge-shaped rope ring 15 through a first connecting pin 14. The side plates 12 are arranged on both sides of the middle plate 11. The middle plate 11 and the side plates 12 are provided with limiting grooves 17 matching the hydraulic cylinder 3. The hydraulic cylinder 3 is arranged in the limiting groove 17. The bottom of the cylinder barrel 31 of the hydraulic cylinder 3 is fixedly connected to the side plate 12 through a pressure plate 16. The top of the piston rod 32 of the hydraulic cylinder 3 is connected to the groove surface of the limiting groove 17 at the bottom of the middle plate 11. One end of the reversing fork 13 is connected to the bottom of the side plate 12 through a second connecting pin 18, and the other end is fixedly connected to the connecting plate 2. A sling 9 is connected below the connecting plate 2. It should be supplemented that a steel wire rope is connected to the wedge-shaped rope ring 15 , and the wedge-shaped rope ring 15 is used to connect the steel wire rope to the steel wire rope tension automatic balancing suspension device 1 , and the signal transmitter is specifically fixed to one side of the side plate 12 .

[0059] It should be added that Figure 1 , Figure 3 As shown, each hydraulic cylinder 3 of the steel wire rope tension automatic balancing suspension device 1 is connected to a first connecting pipe 6 near the pressure plate 16, and the first connecting pipe 6 and the first connecting pipe 6 are connected through the second connecting pipe 7. A valve 8 is provided at the connection between the first connecting pipe 6 and the second connecting pipe 7, and hydraulic balance is achieved between each hydraulic cylinder 3 through the first connecting pipe 6, the second connecting pipe 7 and the valve 8. A pressure sensor 5 for detecting oil pressure is provided on the second connecting pipe 7, and the pressure sensor 5 is connected to the signal transmitter through a signal collector. The pressure sensor 5 is used to detect the oil pressure of the steel wire rope tension automatic balancing suspension device 1, and send the oil pressure signal to the signal transmitter through the signal collector. The signal transmitter receives the oil pressure signal and sends it to the remote terminal. The oil pressure sensor is used to assist the displacement sensor 4 in monitoring the working state of the steel wire rope tension automatic balancing suspension device 1. Specifically, in one embodiment of the present invention, the remote terminal can judge the lifting amount of the steel wire rope tension automatic balancing suspension device 1 by processing and analyzing the oil pressure signal.

[0060] In one embodiment of the present invention, the steel wire rope tension automatic balancing suspension device 1 is specifically provided with four. When the tension of the steel wire rope connected to one of the steel wire rope tension automatic balancing suspension devices 1 is large, for the steel wire rope tension automatic balancing suspension device 1, there are:

[0061] Due to the high tension of the steel wire rope, the middle plate 11 is driven to move upward through the wedge-shaped rope ring 15. Since the top of the piston rod 32 of the hydraulic cylinder 3 is connected to the groove surface of the limiting groove 17 at the bottom of the middle plate 11, during the movement of the middle plate 11, the piston rod 32 of the hydraulic cylinder 3 moves upward synchronously with the middle plate 11, so that the hydraulic cylinder 3 is compressed and the hydraulic pressure in the hydraulic cylinder 3 increases. In addition, since the hydraulic cylinders 3 are connected through the first connecting pipe 6, the second connecting pipe 7 and the valve 8, the liquid in the hydraulic cylinder 3 with increased hydraulic pressure will automatically flow to other hydraulic cylinders 3 with lower pressure through the first connecting pipe 6, the second connecting pipe 7 and the valve 8 until the hydraulic pressure in each hydraulic cylinder 3 is equal and the liquid stops flowing to realize hydraulic balance. In this process, the liquid in the hydraulic cylinder 3 with lower pressure previously increases, driving the corresponding piston rod 32 to extend. During the extension of the piston rod 32, the steel wire rope is driven downward through the middle plate 11 to increase the tension until it is equal to the tension of the steel wire rope with higher tension previously, thereby realizing the tension balance of the steel wire rope. During this working process, the pressure sensor 5 monitors the oil pressure in the second connecting pipe 7 and sends the data to the remote terminal through the signal collector and the signal transmitter.

[0062] Specifically, Figure 4 As shown, it should be noted that in mine operations, the container to be lifted can specifically be a container such as a skip, a cage or a bucket. The skip and the cage are usually lifted by multiple steel ropes provided with a balancing device, and the bucket is mostly lifted by a single rope. During the single-rope lifting process, the bucket is prone to rotation or displacement, thereby affecting the lifting effect, and the two sets of equipment for single-rope and multi-rope lifting greatly increase the use cost of mine operations. Therefore, the present invention adds a sling 9 between the connecting plate 2 and the container to be lifted, and the sling 9 is suitable for three types of lifting containers, namely, skips, cages or buckets.

[0063] Specifically, the sling 9 includes a connecting frame 91, which is in the shape of a square frame with an opening facing downward. A first opening and closing plate 92 and a second opening and closing plate 93 are oppositely arranged on both sides of the connecting frame 91. The first opening and closing plate 92 and the second opening and closing plate 93 are respectively hinged to the connecting frame 91, and the first opening and closing plate 92 and the second opening and closing plate 93 are both one-way opening and closing and have opposite opening and closing directions. The first and second opening and closing plates 92 and 93 are cross-arranged with a first fixing plate 94 and a second fixing plate 95 at one end near the opening of the connecting frame 91, and the first and second opening and closing plates 92 and 93 are cross-arranged with a third fixing plate 81 and a fourth fixing plate 82 at one end away from the opening of the connecting frame 91. The first fixing plate 94 and the second fixing plate 95 are provided with matching first threaded fixing holes 96, and the third fixing plate 81, the fourth fixing plate 82 and the connecting frame 91 are provided with matching second threaded fixing holes 83. The first fixing plate 94 and the second fixing plate 95 can be fixed by passing bolts through the first threaded fixing holes 96, and the third fixing plate 81, the fourth fixing plate 82 and the connecting frame 91 can be fixed by passing bolts through the second threaded fixing holes 83. When both ends of the first and second opening and closing plates 92 and 93 are fixed, the longitudinal section of the first and second opening and closing plates 92, 93 and the connecting frame 91 remain in the same plane, and the bottom end section of the first and second opening and closing plates 92, 93 and the connecting frame 91 remain in the same plane. It should be noted that the first opening and closing plate 92 and the second opening and closing plate 93 are both provided with triangular weight-reducing holes 97, and the third fixing plate 81 and the fourth fixing plate 82 are designed to make one end of the first opening and closing plate 92 and the second opening and closing plate be fixedly connected to the connecting frame 91 when in use, so that the connecting frame 91 can bear weight together with the first opening and closing plate 92 and the second opening and closing plate 93, thereby ensuring the stability of the sling 9 when working. It should be supplemented that a plurality of first connecting holes 98 are provided on the horizontal plate above the connecting frame 91, and a second connecting hole matching the first connecting hole 98 is provided at a corresponding position on the connecting plate 2, so as to realize the fixed connection between the connecting plate 2 and the connecting frame 91. A plurality of third connecting holes 99 are provided on one side of the first opening and closing plate 92 and the second opening and closing plate 93 and on both sides of the connecting frame 91, and the third connecting holes 99 match the lifting connection holes on the container to be lifted, specifically the bucket and the cage, so as to realize the fixed connection between the sling 9 and the container to be lifted. It should be emphasized that the length of the connecting frame 91 should be selected according to actual conditions, and the number of the slings 9 should also be selected according to actual conditions. Specifically, for example, a single sling 9 can be selected when lifting a bucket, and multiple sets of slings 9 can be selected for sharing when lifting a bucket or a cage, or a single sling 9 can be selected for all.

[0064] In the first embodiment of the present invention, when the container to be lifted is a bucket or a cage, the first opening and closing plate 92 and the second opening and closing plate 93 are directly fixed through the first fixing plate 94 and the second fixing plate 95, and the third fixing plate 81 and the fourth fixing plate 82. One end of the sling 9 is fixedly connected to the connecting plate 2 through the first connecting hole 98 on the connecting frame 91, and the other end of the sling 9 is fixed to the bucket or the cage through the connecting frame 91, the first opening and closing plate 92, and the third connecting hole 99 on the second opening and closing plate 93. Then, lifting is started by means of a wire rope, thereby achieving the effect of lifting the bucket or the cage by the sling 9.

[0065] In the second embodiment of the present invention, when the container to be lifted is a bucket, the bolts on the first fixing plate 94 and the second fixing plate 95, the third fixing plate 81 and the fourth fixing plate 82 are loosened to separate them, and then the lifting ring on the bucket is moved between the two ends of the first opening and closing plate 92 and the second opening and closing plate 93, and then the first opening and closing plate 92 and the second opening and closing plate 93 are fixed by the first fixing plate 94 and the second fixing plate 95, the third fixing plate 81 and the fourth fixing plate 82, and the lifting ring is attached to the first fixing plate 94, and then the lifting ring is fixed between the arc pressing block 10 and the first fixing plate 94 by an arc pressing block 10, and the arc pressing block 10 is fixed to the top of the first fixing plate 94 by bolts, thereby realizing the fixed connection between the sling 9 and the bucket. After ensuring that the top of the sling 9 is fixedly connected to the connecting plate 2 through the first connecting hole 98 on the connecting frame 91, it is lifted by a wire rope, so as to realize the lifting of the bucket by the sling 9.

[0066] In the third embodiment of the present invention, the first connecting hole 98 on the sling 9 can be replaced by a mounting hole that matches the wire rope tension automatic balancing suspension device 1, that is, the sling 9 can replace the connecting plate 2 and be directly fixedly connected to the wire rope tension automatic balancing suspension device 1. Whether a connecting plate 2 is provided between the wire rope tension automatic balancing suspension device 1 and the sling 9 should be determined according to actual needs.

[0067] The present invention also provides a travel monitoring method of a travel monitoring device applied to the wire rope tension automatic balancing suspension device 1, and the steps are as follows:

[0068] (1) Each of the displacement sensors 4 measures the stroke of each piston rod 32 and sends the displacement signal to the signal transmitter;

[0069] (2) The signal transmitter sends the displacement signal to the remote terminal;

[0070] (3) The remote terminal processes the received displacement signals to obtain the stroke value of the piston rod 32 and analyzes it to determine whether the hydraulic cylinder 3 has loose rope, stuck cylinder, leakage, or unadjustable tension;

[0071] (4) The remote terminal displays the stroke of each piston rod 32. If it is determined that the hydraulic cylinder 3 is working abnormally, the control alarm will sound.

[0072] Furthermore, if Figure 5 As shown, the displacement sensor 4 transmits the displacement signal of the piston rod 32 to the remote terminal every 10 ms via the signal transmitter.

[0073] Furthermore, if Figure 5 As shown, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder 3 has a loose rope phenomenon are as follows:

[0074] (1) The remote terminal records the stroke value of the piston rod 32 received each time;

[0075] (2) The remote terminal compares the stroke value obtained each time with the value recorded last time to determine the increase or decrease state of the stroke of the piston rod 32;

[0076] (3) If the stroke volume increases continuously for a number of times greater than the preset value in the remote terminal, it is determined that a loose rope event has occurred and the alarm will sound.

[0077] In one embodiment of the present invention, one of the wire rope tension automatic balancing suspension devices 1 in the stroke monitoring device of the wire rope tension automatic balancing suspension device 1 is taken as an example: the displacement sensor 4 transmits the displacement signal of the piston rod 32 to the remote terminal once every 10 ms through the signal transmitter, and the remote terminal receives the displacement signal transmitted by the signal transmitter each time and processes it to obtain the piston rod 32 stroke value, and the remote terminal records the previous piston rod 32 stroke value. After receiving the adjacent next piston rod 32 stroke value, the remote terminal compares the two stroke values ​​to determine the increase or decrease state of the piston rod 32 stroke. If the piston rod 32 stroke increases at this time, the loose rope alarm coefficient in the remote terminal increases by 1 to 1, and then the remote terminal compares the new stroke value received again with the adjacent previous piston rod 32 stroke value, and determines the increase or decrease state of the piston rod 32 stroke again. If the piston rod 32 stroke is still increasing at this time, the loose rope alarm coefficient in the remote terminal increases by 1 to 2 again. If the piston rod 32 stroke decreases at this time, the loose rope alarm coefficient in the remote terminal is directly set to 0. Repeat the above steps. When the loose rope alarm coefficient in the remote terminal reaches the preset value, it means that the wire rope connected to the wire rope tension automatic balancing suspension device 1 is in a loose rope state. At this time, the remote terminal controls the alarm and the staff conducts maintenance.

[0078] Specifically, in another embodiment of the present invention, when the remote terminal compares the stroke values ​​of the piston rod 32 for two consecutive times, it will also perform specific numerical calculations to calculate the specific numerical value of each increase or decrease in stroke. When the calculation finds that the stroke value received each time becomes larger continuously, and the amplitude of each increase does not increase, the remote terminal determines that the alarm is turned on when the loose rope alarm coefficient increases to 4. On the contrary, if the calculation finds that the stroke value received each time becomes larger continuously, and the amplitude of each increase also increases, the remote terminal determines that the alarm is turned on when the loose rope alarm coefficient increases to 2, thereby making the monitoring effect of the stroke monitoring device more stable.

[0079] Furthermore, if Figure 6 As shown, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder 3 has leakage are as follows:

[0080] (1) The remote terminal records the stroke value of the piston rod 32 received each time;

[0081] (2) The remote terminal compares the piston rod 32 stroke value received each time with the last recorded value, and calculates the increase or decrease in the current piston rod 32 stroke value;

[0082] (3) Add the increase and decrease of the stroke amount of each piston rod 32 in a single stroke and determine whether it is 0.

[0083] (4) If the sum of the increase and decrease in the stroke volume of each piston rod 32 is not equal to 0, it is determined that a leakage event has occurred and the alarm is sounded.

[0084] In one embodiment of the present invention, the wire rope tension automatic balancing suspension device 1 is specifically provided with four, that is, the displacement sensors 4 are also provided with four, and the four displacement sensors 4 transmit the displacement signal of the piston rod 32 to the remote terminal once every 10ms through the signal transmitter, and the remote terminal receives the displacement signal transmitted by the signal transmitter each time and processes it to obtain the piston rod 32 stroke value, and the remote terminal records the four piston rod 32 stroke values ​​of the previous time, and after receiving the adjacent four piston rod 32 stroke values ​​of the next time, the remote terminal compares and calculates the two stroke values ​​of the same piston rod 32 respectively, and calculates the increase and decrease of the stroke of the next piston rod 32. After that, the remote terminal adds the increase and decrease of the four piston rod 32 strokes received at the same time, and the increase is positive and the decrease is negative, and judges whether the result is 0. If it is 0, it means that there is no leakage in the hydraulic cylinder 3, and if it is not equal to 0, it means that there is leakage in the hydraulic cylinder 3. At this time, the remote terminal controls the alarm to alarm, and the staff performs maintenance.

[0085] Furthermore, if Figure 7As shown, the data analysis steps for the remote terminal to determine whether the tension of the hydraulic cylinder 3 cannot be adjusted are as follows:

[0086] (1) The remote terminal is preset with the maximum and minimum strokes allowed by the piston rod 32;

[0087] (2) comparing the received piston rod 32 stroke value with a preset value;

[0088] (3) If the stroke value of the piston rod 32 reaches the preset value, it is determined that the tension cannot be adjusted and the alarm is sounded.

[0089] In one embodiment of the present invention, one of the wire rope tension automatic balancing suspension devices 1 in the stroke monitoring device of the wire rope tension automatic balancing suspension device 1 is taken as an example: the displacement sensor 4 transmits the displacement signal of the piston rod 32 to the remote terminal every 10 ms through the signal transmitter, and the remote terminal receives the displacement signal transmitted by the signal transmitter each time and processes it to obtain the stroke value of the piston rod 32. The remote terminal is preset with the maximum stroke and the minimum stroke allowed by the piston rod 32. The remote terminal compares the received stroke value of the piston rod 32 with the preset value. If the stroke value of the piston rod 32 reaches the preset value, it means that the piston rod of the hydraulic cylinder 3 is extended to the maximum or minimum at this time, and the hydraulic cylinder 3 is in a state where a certain chamber is compressed to be empty, and the tension of the wire rope connected to it can no longer be increased or decreased, that is, the adjustment effect can no longer be achieved. At this time, the remote terminal controls the alarm and the staff conducts maintenance.

[0090] Furthermore, if Figure 8 As shown, the data analysis steps for the remote terminal to determine whether the hydraulic cylinder 3 is stuck are as follows:

[0091] (1) The remote terminal is preset with a maximum time value for which the stroke of the piston rod 32 is allowed to remain unchanged;

[0092] (2) The remote terminal records the stroke value of the piston rod 32 received each time;

[0093] (3) Compare the piston rod 32 stroke value received each time with the last recorded value to determine whether a change has occurred;

[0094] (4) Compare the time value during which the travel amount value remains unchanged during the continuous time with the preset value;

[0095] (5) If the time value reaches the preset value, it is judged that a cylinder jam has occurred and the alarm will sound.

[0096] In one embodiment of the present invention, one of the wire rope tension automatic balancing suspension devices 1 in the stroke monitoring device of the wire rope tension automatic balancing suspension device 1 is taken as an example: the displacement sensor 4 transmits the displacement signal of the piston rod 32 to the remote terminal every 10 ms through the signal transmitter, and the remote terminal receives the displacement signal transmitted by the signal transmitter each time and processes it to obtain the piston rod 32 stroke value, and the remote terminal is preset with the maximum time value that the piston rod 32 stroke is allowed to remain unchanged; the remote terminal compares the piston rod 32 stroke value received each time with the last recorded value to determine whether it has changed. If it remains unchanged, the time value for which the stroke value remains unchanged is recorded. When the recorded time value reaches the preset value, it means that the wire rope tension automatic balancing suspension device 1 is in a stuck cylinder state, and the tension of the wire ropes connected to other wire rope tension automatic balancing suspension devices 1 is forced to increase, which is prone to dangerous situations. At this time, the remote terminal controls the alarm to sound an alarm, and the staff conducts maintenance. It should be added that if the travel value changes before the time value for which the recorded travel value remains unchanged reaches the preset value, the remote terminal will reset the recorded time value and start recording again until the next time the travel value remains unchanged.

[0097] The working process of the present invention is as follows:

[0098] During use, a number of steel wire ropes are connected to the connecting plate 2 through a number of steel wire rope tension automatic balancing suspension devices 1, and the container to be lifted is hoisted under the connecting plate 2 through a sling 9. Each of the steel wire rope tension automatic balancing suspension devices 1 is provided with a hydraulic cylinder 3, and hydraulic balance is achieved between the hydraulic cylinders 3 through the first connecting pipe 6, the second connecting pipe 7 and the valve 8. When the tension of the steel wire rope connected to one of the steel wire rope tension automatic balancing suspension devices 1 is large, the steel wire rope drives the middle plate 11 of the device to move upward through the wedge-shaped rope ring 15, and the middle plate 11 drives the piston rod 32 of the hydraulic cylinder 3 in the device to move upward synchronously and compress the hydraulic cylinder 3. Due to the increase in hydraulic pressure, the liquid in the hydraulic cylinder 3 flows through the first connecting pipe 6, the second connecting pipe 7 and the valve 8 to other hydraulic cylinders 3 with smaller hydraulic pressure. When the hydraulic pressure in each hydraulic cylinder 3 is equal, the liquid no longer flows to achieve hydraulic balance, thereby achieving steel wire rope tension balance. During this working process, each hydraulic cylinder 3 is provided with a displacement sensor 4, and the displacement sensor 4 can monitor the displacement stroke of the piston rod 32 in each hydraulic cylinder 3, and transmit it to the remote terminal through the signal collector and the signal transmitter. The remote terminal processes the received displacement signals to obtain the piston rod 32 stroke value and then analyzes it. Through the analysis, it can be determined whether the hydraulic cylinder 3 has loose rope, leakage and unadjustable tension, and corresponding display and alarm are performed. Based on the mutual cooperation of the above mechanisms and methods, the stability, safety and efficiency of the stroke monitoring device of the wire rope tension automatic balancing suspension device 1 are guaranteed.

[0099] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive, and therefore the present invention is not limited to the embodiments described in the specific implementation manners. Any other implementation manners derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A travel monitoring device for a wire rope tension automatic balancing suspension device, characterized in that: The invention comprises a connecting plate (2) and a plurality of steel wire rope tension automatic balancing suspension devices (1), wherein a plurality of steel wire ropes are connected to the connecting plate (2) via the plurality of steel wire rope tension automatic balancing suspension devices (1), each of the steel wire rope tension automatic balancing suspension devices (1) comprises a hydraulic cylinder (3), a displacement sensor (4) is arranged in the hydraulic cylinder (3), the displacement sensor (4) comprises a fixedly connected signal end (41) and a probe end (42), and the displacement sensor (4) can monitor the displacement adjustment amount of the steel wire rope tension automatic balancing suspension device (1); The hydraulic cylinder (3) comprises a cylinder barrel (31) and a piston rod (32); a signal end (41) of a displacement sensor (4) is embedded in the bottom of the cylinder barrel (31); the piston rod (32) is a hollow structure and an annular groove (33) is provided on the bottom end surface of the piston rod (32); a magnetic ring (43) is fixed in the annular groove (33); a magnetic isolation gasket (44) is provided between the magnetic ring (43) and the bottom end surface of the annular groove (33); and a probe end (42) of the displacement sensor (4) passes through the magnetic ring (43) and is provided in the hollow structure; A signal transmission line (45) is led out from the signal end (41), the signal transmission line (45) is led out through the bottom of the cylinder barrel (31) to the outside of the hydraulic cylinder (3) and is connected to a signal transmitter through a signal collector, the signal transmitter is fixed to the outside of the hydraulic cylinder (3), the signal transmitter is used to send sensor monitoring data to a remote terminal, and the remote terminal is connected to an alarm; The wire rope tension automatic balancing suspension device (1) also includes a middle plate (11), a side plate (12) and a reversing fork (13), wherein the middle plate (11) is connected to a wedge-shaped rope ring (15) via a first connecting pin (14), and the side plates (12) are arranged on both sides of the middle plate (11). Both the middle plate (11) and the side plates (12) are provided with a limiting groove (17) matching the hydraulic cylinder (3), and the hydraulic cylinder (3) is arranged in the limiting groove (17). The bottom of the cylinder barrel (31) of the hydraulic cylinder (3) is fixedly connected to the side plate (12) via a pressure plate (16), and the top of the piston rod (32) of the hydraulic cylinder (3) is connected to the groove surface of the limiting groove (17) at the bottom of the middle plate (11). One end of the reversing fork (13) is connected to the bottom of the side plate (12) via a second connecting pin (18), and the other end is fixedly connected to the connecting plate (2), and a sling (9) is connected below the connecting plate (2).

2. A travel monitoring method for a travel monitoring device of a wire rope tension automatic balancing suspension device according to claim 1, characterized in that : (1) Each of the displacement sensors (4) measures the stroke of each piston rod (32) and sends a displacement signal to a signal transmitter; (2) The signal transmitter sends the displacement signal to the remote terminal; (3) The remote terminal processes the received displacement signals to obtain the stroke value of the piston rod (32) and analyzes the stroke value to determine whether the hydraulic cylinder (3) has loose rope, stuck cylinder, leaking fluid, or the tension cannot be adjusted; (4) The remote terminal displays the stroke of each piston rod (32). If it is determined that the hydraulic cylinder (3) is working abnormally, the control alarm will sound an alarm.

3. The travel monitoring method of a wire rope tension automatic balancing suspension device according to claim 2 is characterized in that The displacement sensor (4) transmits the displacement signal of the piston rod (32) to the remote terminal every 10 ms via the signal transmitter.

4. A travel monitoring method for a wire rope tension automatic balancing suspension device according to claim 3, characterized in that The specific data analysis steps for the remote terminal to determine whether the hydraulic cylinder (3) has a loose rope phenomenon are as follows: (1) The remote terminal records the stroke value of the piston rod (32) received each time; (2) The remote terminal compares the stroke value obtained each time with the value recorded last time to determine the increase or decrease state of the stroke of the piston rod (32); (3) If the stroke volume increases continuously for a number of times greater than the preset value in the remote terminal, it is judged that a loose rope event has occurred and the alarm will sound.

5. A method for monitoring the travel of a wire rope tension automatic balancing suspension device according to claim 4, characterized in that The specific data analysis steps for the remote terminal to determine whether the hydraulic cylinder (3) is leaking are as follows: (1) The remote terminal records the stroke value of the piston rod (32) received each time; (2) The remote terminal compares the piston rod (32) stroke value received each time with the last recorded value, and calculates the increase or decrease in the current piston rod (32) stroke value; (3) Add the increase and decrease of the stroke of each piston rod (32) in a single stroke to determine whether it is 0; (4) If the sum of the increase and decrease in the stroke of each piston rod (32) is not equal to 0, it is determined that a leakage event has occurred and the alarm is sounded.

6. A method for monitoring the travel of a wire rope tension automatic balancing suspension device according to claim 5, characterized in that The specific data analysis steps for the remote terminal to determine whether the tension of the hydraulic cylinder (3) cannot be adjusted are as follows: (1) The remote terminal is preset with the maximum and minimum allowable strokes of the piston rod (32); (2) comparing the received piston rod (32) stroke value with a preset value; (3) If the stroke value of the piston rod (32) reaches a preset value, it is determined that the tension cannot be adjusted and the alarm is sounded.

7. A method for monitoring the travel of a wire rope tension automatic balancing suspension device according to claim 6, characterized in that The specific data analysis steps for the remote terminal to determine whether the hydraulic cylinder (3) is stuck are as follows: (1) The remote terminal is preset with a maximum time value for which the stroke of the piston rod (32) is allowed to remain unchanged; (2) The remote terminal records the stroke value of the piston rod (32) received each time; (3) comparing the piston rod (32) stroke value received each time with the last recorded value to determine whether a change has occurred; (4) Compare the time value during which the travel distance value remains unchanged for a continuous period of time with the preset value; (5) If the time value reaches the preset value, it is judged that a cylinder jam event has occurred and the alarm will sound.

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