CN114441081A - Cableway traction cable stress state real-time monitoring device and method - Google Patents
Cableway traction cable stress state real-time monitoring device and method Download PDFInfo
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- CN114441081A CN114441081A CN202210021337.5A CN202210021337A CN114441081A CN 114441081 A CN114441081 A CN 114441081A CN 202210021337 A CN202210021337 A CN 202210021337A CN 114441081 A CN114441081 A CN 114441081A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
- G01L5/10—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a device and a method for monitoring the stress state of a cableway traction cable in real time, wherein the device comprises a metal bridge, the top of the metal bridge is fixedly connected with a fixing nut, the inner wall of the fixing nut is movably connected with an adjusting screw, the bottom of the adjusting screw is fixedly connected with a steel wire limiting device, the outer wall of the steel wire limiting device is fixedly connected with a ceramic pressure sensor, one side of the ceramic pressure sensor is fixedly connected with a pressure sensor connecting wire, the outer wall of the metal bridge is fixedly connected with a conductive spring, the inner wall of the metal bridge is fixedly connected with a signal amplifier, and one side of the metal bridge is fixedly connected with a clamping plate. The device for monitoring the stress state of the cableway traction cable in real time starts from a cableway cable supporting wheel, and provides a cable supporting wheel system which can monitor the tension of the cableway traction cable in real time and has a sensing function based on a pressure-sensitive sensor technology.
Description
Technical Field
The invention relates to the technical field of cableway traction, in particular to a device and a method for monitoring the stress state of a cableway traction cable in real time.
Background
In an aerial cableway, a core bearing member is a suspension cable system, the suspension cable system is required to bear the action of various complex loads in the working process, and the real-time loading state of the cable system is very important for the safe and stable operation of the cableway.
At present, the monitoring technical means for the key dynamic response characteristics of the cableway cable system in real time, such as real-time tension, vibration and the like of a bearing cable, are very limited.
Therefore, a device and a method for monitoring the stress state of a traction cable of a cableway in real time are provided so as to solve the problems.
Disclosure of Invention
The invention aims to provide a device and a method for monitoring the stress state of a cableway traction cable in real time, which aim to solve the problem that the prior art provides a very limited technical means for monitoring the key dynamic response characteristics of the cableway cable system in real time, such as real-time tension, vibration and the like of a bearing cable.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cableway haulage cable stress state real-time supervision device, includes the metal testing bridge, the top fixedly connected with fixation nut of metal testing bridge, fixation nut's inner wall swing joint has adjusting screw, adjusting screw's bottom fixedly connected with wire rope stop device, wire rope stop device's outer wall fixedly connected with pottery type pressure sensor, pottery type pressure sensor's one side fixedly connected with pressure sensor connecting wire, the outer wall fixedly connected with conductive spring of metal testing bridge, the inner wall fixedly connected with signal amplifier of metal testing bridge, one side fixedly connected with grip block of metal testing bridge.
The other side of the metal bridge frame is movably connected with a clamping piece, the inner wall of the clamping piece is movably connected with a fixing bolt mechanism, the inner wall of the clamping plate is fixedly connected with a bearing, the outer wall of the bearing is fixedly connected with a cast steel pulley, the outer wall of the cast steel pulley is fixedly connected with a polyurethane rubber liner, the outer wall of the polyurethane rubber liner is fixedly connected with a metal lantern ring, the inner wall of the rubber liner is provided with a sensor mounting groove, the inner wall of the sensor mounting groove is fixedly connected with a button type piezoelectric ceramic sensor, and the outer wall of the polyurethane rubber liner is fixedly connected with a metal wire ring.
Preferably, the fixing nut is in threaded connection with the adjusting screw rod, and the adjusting screw rod penetrates through the outer wall of the metal bridge frame through the fixing nut.
Preferably, one end of the conductive spring extends into the metal wire ring, and a pre-compression structure is arranged in the conductive spring, and the other end of the conductive spring is electrically connected with the signal amplifier.
Preferably, the urethane rubber pad has a ring shape, and the urethane rubber pad has an elastic structure.
Preferably, the sensor mounting grooves are distributed at equal angles along the axial center line of the polyurethane rubber gasket, current signal leads are led out from two sides of the button type piezoelectric ceramic sensor, and the tail ends of the positive electrode and the negative electrode of each current signal lead are electrically connected with the metal lantern ring respectively.
The invention provides another technical scheme which is a monitoring method of a device for monitoring the stress state of a cableway traction cable in real time, comprising the following steps:
the method comprises the following steps: firstly, the adjusting screw rod is shifted to adjust the upper position and the lower position of the adjusting screw rod, so that the adjusting screw rod drives the ceramic pressure sensor to adjust the position;
step two: penetrating an external steel wire rope into the steel wire rope limiting device, and limiting the position of the steel wire rope through the steel wire rope limiting device;
step three: the external steel wire rope transmits pressure to the button type piezoelectric ceramic sensor through the polyurethane rubber gasket, the button type piezoelectric ceramic sensor generates signal current under the action of the pressure, and the current signal enters the signal amplifier through the lead, the metal lead ring and the conductive spring;
step four: amplifying the measured signal by a signal amplifier, filtering to form a standard 4-20mA analog quantity signal, and calibrating the signal with the pressure applied to the polyurethane rubber gasket by the steel wire rope to determine the pressure value represented by the 4-20mA analog quantity signal;
step five: after the position of the adjusting screw is set, the positions of the ceramic pressure sensor and the cast steel pulleys on two sides are determined, the included angle a between the axis of the steel wire rope and the axis of the adjusting screw is determined, and the stress analysis is carried out on the steel wire rope section at the position of the ceramic pressure sensor to obtain a stress relation formula, which is as follows:
T＝F/(2*cosa)；
step six: f in the formula is a pressure value which can be directly measured by the button type piezoelectric ceramic sensor, the tensioning tension T of the steel wire rope can be obtained through the formula, accordingly, the tension of the cableway traction rope can be monitored in real time by means of the button type piezoelectric ceramic sensor by utilizing the triangular geometric position relation between two adjacent cast steel pulleys of the rope supporting wheel set and the adjusting screw, and the change of the tension of the steel wire rope can be indirectly measured by the button type piezoelectric ceramic sensor in real time.
Compared with the prior art, the invention has the beneficial effects that: the device for monitoring the stress state of the cableway traction cable in real time starts from a cableway cable supporting wheel, and provides a cable supporting wheel system which can monitor the tension of the cableway traction cable in real time and has a sensing function based on a pressure-sensitive sensor technology;
1. the polyurethane rubber gasket is annular and is sleeved on the cast steel pulley, a gasket rope groove is formed in the back of the gasket, and the traction steel wire rope is positioned in the groove, so that the steel wire rope is prevented from being in direct contact with the metal pulley, and the abrasion of the traction steel wire rope is reduced;
2. one end of the conductive spring is precompressed by a certain length and is tightly pressed on the metal wire ring, and the other end of the conductive spring is connected with the signal input end of the signal amplifier, so that even if the cast steel pulley is driven by the friction force of the traction steel wire rope to rotate, because one end of the conductive spring is tightly pressed on the metal wire ring, no matter how the pulley rotates, signal current can transmit signals through the metal wire ring and the conductive spring;
3. in actual work, the cast steel pulley can rotate under the action of friction between the traction steel wire rope and the polyurethane rubber gasket, so that four button type piezoelectric ceramic sensors are uniformly arranged along the circumferential direction of the polyurethane rubber gasket, and the contact pressure between the cast steel pulley and the traction steel wire rope can be timely measured under the condition that the cast steel pulley rotates.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of the present invention;
FIG. 3 is a schematic side view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic view of the cross-sectional structure of the present invention B-B;
FIG. 6 is a front view of a polyurethane rubber gasket according to the present invention;
FIG. 7 is a schematic view of a side structure of a urethane rubber cushion according to the present invention;
FIG. 8 is a schematic top view of a polyurethane rubber gasket of the present invention;
FIG. 9 is a schematic view of the cross-sectional structure of C-C of the present invention;
FIG. 10 is a schematic view of the cross-sectional structure of the present invention in D-D;
fig. 11 is a schematic structural view of the principle of tension calculation of the steel wire rope according to the present invention.
In the figure: 1. a metal bridge frame; 2. fixing a nut; 3. adjusting the screw rod; 4. a ceramic type pressure sensor; 5. a wire rope limiting device; 6. a pressure sensor connecting wire; 7. a conductive spring; 8. a signal amplifier; 9. a clamping plate; 10. a clip; 11. a fixed bolt mechanism; 12. a bearing; 13. a urethane rubber pad; 14. casting steel pulleys; 15. a metal collar; 16. a sensor mounting groove; 17. a button-type piezoelectric ceramic sensor; 18. a metal wire loop.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-11, the present invention provides a technical solution: the device comprises a metal bridge 1, wherein a fixing nut 2 is fixedly connected to the top of the metal bridge 1, an adjusting screw 3 is movably connected to the inner wall of the fixing nut 2, a steel wire rope limiting device 5 is fixedly connected to the bottom of the adjusting screw 3, a ceramic pressure sensor 4 is fixedly connected to the outer wall of the steel wire rope limiting device 5, a pressure sensor connecting wire 6 is fixedly connected to one side of the ceramic pressure sensor 4, a conductive spring 7 is fixedly connected to the outer wall of the metal bridge 1, a signal amplifier 8 is fixedly connected to the inner wall of the metal bridge 1, and a clamping plate 9 is fixedly connected to one side of the metal bridge 1.
The other side swing joint of metal testing bridge 1 has clamping piece 10, the inner wall swing joint of clamping piece 10 has fixing bolt mechanism 11, the inner wall fixedly connected with bearing 12 of grip block 9, the outer wall fixedly connected with cast steel pulley 14 of bearing 12, the outer wall fixedly connected with polyurethane rubber liner 13 of cast steel pulley 14, the outer wall fixedly connected with metal lantern ring 15 of polyurethane rubber liner 13, sensor mounting groove 16 has been seted up to the inner wall of polyurethane rubber liner 13, the inner wall fixedly connected with button type piezoceramics sensor 17 of sensor mounting groove 16, the outer wall fixedly connected with metal conductor ring 18 of polyurethane rubber liner 13.
The fixing nut 2 is in threaded connection with the adjusting screw rod 3, and the adjusting screw rod 3 penetrates through the outer wall of the metal bridge frame 1 through the fixing nut 2.
One end of the conductive spring 7 extends into the metal wire ring 18 and is provided with a pre-compression structure, and the other end of the conductive spring 7 is electrically connected with the signal amplifier 8.
When the pulley is driven to rotate by the friction force of the traction rope, but one end of the conductive spring 7 is pressed on the metal wire ring 18, no matter how the pulley rotates, the signal current can transmit signals through the metal wire ring 18 and the conductive spring 7.
The urethane rubber pad 13 has a ring shape, and the urethane rubber pad 13 has an elastic structure.
Thereby avoiding the direct contact of the steel wire rope and the metal pulley and reducing the abrasion of the traction steel wire rope.
The sensor mounting grooves 16 are distributed at equal angles along the axial center line of the polyurethane rubber gasket 13, current signal leads are led out from both sides of the button type piezoelectric ceramic sensor 17, and the tail ends of the positive electrode and the negative electrode of the current signal leads are respectively and electrically connected with the metal lantern ring 15.
The cast steel pulley 14 rotates under the action of friction between the traction steel wire rope and the polyurethane rubber liner 13, so that four button-type piezoelectric ceramic sensors 17 are uniformly arranged along the circumferential direction of the polyurethane liner, and the contact pressure between the cast steel pulley 14 and the traction steel wire rope can be timely measured under the condition that the cast steel pulley 14 rotates.
In order to better show a specific use method of the device for monitoring the stress state of the cableway traction cable in real time, the monitoring method of the device for monitoring the stress state of the cableway traction cable in real time in the embodiment includes the following steps:
the method comprises the following steps: firstly, the adjusting screw 3 is shifted to adjust the upper and lower positions of the adjusting screw 3, so that the adjusting screw 3 drives the ceramic pressure sensor 4 to adjust the position;
step two: penetrating an external steel wire rope into the steel wire rope limiting device 5, and limiting the position of the steel wire rope through the steel wire rope limiting device 5;
step three: the external steel wire rope transmits pressure to the button type piezoelectric ceramic sensor 17 through the polyurethane rubber gasket 13, the button type piezoelectric ceramic sensor 17 generates signal current under the action of the pressure, and the current signal enters the signal amplifier 8 through the lead, the metal lead ring 18 and the conductive spring 7;
step four: the measured signal is amplified by a signal amplifier 8 and filtered to form a standard 4-20mA analog quantity signal, and the signal is calibrated with the pressure applied to the polyurethane rubber gasket 13 by the steel wire rope, so that the pressure value represented by the 4-20mA analog quantity signal can be determined;
step five: after the position of the adjusting screw 3 is set, the positions of the ceramic pressure sensor 4 and the cast steel pulleys 14 on the two sides are determined, the included angle a between the axis of the steel wire rope and the axis of the adjusting screw 3 is determined, and the steel wire rope section at the position of the ceramic pressure sensor 4 is subjected to stress analysis to obtain a stress relation formula I, which is as follows:
T＝F/(2*cosa)；
step six: in the formula, F is a pressure value which can be directly measured by the button type piezoelectric ceramic sensor 17, the tensioning tension T of the steel wire rope can be obtained through the formula, accordingly, the tension of the cableway traction rope can be monitored in real time by means of the button type piezoelectric ceramic sensor 17 by utilizing the triangular geometric position relation between the two adjacent cast steel pulleys 14 of the rope supporting wheel set and the adjusting screw 3, and the change of the tension of the steel wire rope can be indirectly measured by the button type piezoelectric ceramic sensor 17 in real time.
The working principle of the embodiment is as follows: firstly, the adjusting screw rod 3 is shifted to adjust the upper and lower positions of the adjusting screw rod 3, so that the adjusting screw rod 3 drives the ceramic type pressure sensor 4 to adjust the position, then an external steel wire rope penetrates into the steel wire rope limiting device 5 to limit the position of the steel wire rope through the steel wire rope limiting device 5, then the external steel wire rope transmits the pressure to the button type piezoelectric ceramic sensor 17 through the polyurethane rubber gasket 13, the button type piezoelectric ceramic sensor 17 generates signal current under the action of the pressure, the current signal enters the signal amplifier 8 through a wire, a metal wire ring 18 and a conductive spring 7, finally the measured signal is amplified through the signal amplifier 8 and filtered to form a standard 4-20mA analog quantity signal, the signal is calibrated with the pressure applied to the polyurethane rubber gasket 13 by the steel wire rope, and the pressure value represented by the 4-20mA analog quantity signal can be determined, after the position of the adjusting screw 3 is adjusted, the positions of the ceramic pressure sensor 4 and the cast steel pulleys 14 on the two sides are determined, the included angle a between the axis of the steel wire rope and the axis of the adjusting screw 3 is determined, the stress of the steel wire rope section at the position of the ceramic pressure sensor 4 is analyzed to obtain a stress relation formula I, the pressure value which can be directly measured by the button type piezoelectric ceramic sensor 17 is obtained according to F in the stress relation formula I, the tensioning tension T of the steel wire rope can be obtained through the above formula, accordingly, the triangular geometric position relation between the two adjacent cast steel pulleys 14 of the rope supporting wheel set and the adjusting screw 3 is utilized, the tensioning force of the cableway traction rope can be monitored in real time by the button type piezoelectric ceramic sensor 17, and the change of the tensioning force of the steel wire rope can be indirectly measured by the button type piezoelectric ceramic sensor 17 in real time.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof.
Claims (6)
1. The utility model provides a cableway haulage cable stress state real-time supervision device, includes metal testing bridge (1), its characterized in that: the metal bridge frame comprises a metal bridge frame (1), and is characterized in that a fixing nut (2) is fixedly connected to the top of the metal bridge frame (1), an adjusting screw (3) is movably connected to the inner wall of the fixing nut (2), a steel wire rope limiting device (5) is fixedly connected to the bottom of the adjusting screw (3), a ceramic pressure sensor (4) is fixedly connected to the outer wall of the steel wire rope limiting device (5), a pressure sensor connecting wire (6) is fixedly connected to one side of the ceramic pressure sensor (4), a conductive spring (7) is fixedly connected to the outer wall of the metal bridge frame (1), a signal amplifier (8) is fixedly connected to the inner wall of the metal bridge frame (1), and a clamping plate (9) is fixedly connected to one side of the metal bridge frame (1);
the other side swing joint of metal testing bridge (1) has clamping piece (10), the inner wall swing joint of clamping piece (10) has fixing bolt mechanism (11), the inner wall fixedly connected with bearing (12) of grip block (9), the outer wall fixedly connected with cast steel pulley (14) of bearing (12), the outer wall fixedly connected with polyurethane rubber liner (13) of cast steel pulley (14), the outer wall fixedly connected with metal lantern ring (15) of polyurethane rubber liner (13), sensor mounting groove (16) have been seted up to the inner wall of rubber liner (13), the inner wall fixedly connected with button type piezoceramics sensor (17) of sensor mounting groove (16), the outer wall fixedly connected with metal wire ring (18) of polyurethane rubber liner (13).
2. The device for monitoring the stress state of the traction cable of the cableway in real time according to claim 1, characterized in that: the fixing nut (2) is in threaded connection with the adjusting screw rod (3), and the adjusting screw rod (3) penetrates through the outer wall of the metal bridge frame (1) through the fixing nut (2).
3. The device for monitoring the stress state of the traction cable of the cableway in real time according to claim 1, characterized in that: one end of the conductive spring (7) extends into the metal wire ring (18) and is provided with a pre-compression structure, and the other end of the conductive spring (7) is electrically connected with the signal amplifier (8).
4. The device for monitoring the stress state of the traction cable of the cableway in real time according to claim 1, characterized in that: the polyurethane rubber gasket (13) is annular, and the polyurethane rubber gasket (13) is of an elastic structure.
5. The device for monitoring the stress state of the traction cable of the cableway in real time according to claim 1, characterized in that: the sensor mounting grooves (16) are distributed at equal angles along the axial center line of the polyurethane rubber gasket (13), current signal leads are led out from two sides of the button type piezoelectric ceramic sensor (17), and the tail ends of the positive electrode and the negative electrode of the current signal leads are respectively electrically connected with the metal lantern ring (15).
6. The monitoring method of the cableway traction cable stress state real-time monitoring device according to claim 1, characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: firstly, the adjusting screw (3) is shifted to adjust the vertical position of the adjusting screw (3), so that the adjusting screw (3) drives the ceramic pressure sensor (4) to adjust the position;
step two: penetrating an external steel wire rope into the steel wire rope limiting device (5), and limiting the position of the steel wire rope through the steel wire rope limiting device (5);
step three: the external steel wire rope transmits pressure to the button type piezoelectric ceramic sensor (17) through the polyurethane rubber gasket (13), the button type piezoelectric ceramic sensor (17) generates signal current under the action of the pressure, and the current signal enters the signal amplifier (8) through the wire, the metal wire ring (18) and the conductive spring (7);
step four: the measured signal is amplified by a signal amplifier (8) and filtered to form a standard 4-20mA analog quantity signal, and the signal is calibrated with the pressure applied to the polyurethane rubber gasket (13) by the steel wire rope, so that the pressure value represented by the 4-20mA analog quantity signal can be determined;
step five: after the position of the adjusting screw (3) is set, the positions of the ceramic pressure sensor (4) and the cast steel pulleys (14) on the two sides are determined, the included angle a between the axis of the steel wire rope and the axis of the adjusting screw (3) is determined, and the steel wire rope section at the position of the ceramic pressure sensor (4) is subjected to stress analysis to obtain a stress relation formula (I), which is as follows:
T＝F/(2*cosa)；
step six: f in the formula is a pressure value which can be directly measured by the button type piezoelectric ceramic sensor (17), the tensioning tension T of the steel wire rope can be obtained through the formula, accordingly, the tension of the cableway traction rope can be monitored in real time by means of the button type piezoelectric ceramic sensor (17) by utilizing the triangular geometric position relation between two adjacent cast steel pulleys (14) of the rope supporting wheel set and the adjusting screw (3), and the tension of the steel wire rope can be indirectly measured by the button type piezoelectric ceramic sensor (17) in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210021337.5A CN114441081A (en) | 2022-01-10 | 2022-01-10 | Cableway traction cable stress state real-time monitoring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210021337.5A CN114441081A (en) | 2022-01-10 | 2022-01-10 | Cableway traction cable stress state real-time monitoring device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114441081A true CN114441081A (en) | 2022-05-06 |
Family
ID=81367519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210021337.5A Withdrawn CN114441081A (en) | 2022-01-10 | 2022-01-10 | Cableway traction cable stress state real-time monitoring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114441081A (en) |
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2022
- 2022-01-10 CN CN202210021337.5A patent/CN114441081A/en not_active Withdrawn
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Application publication date: 20220506 |
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