CN114112157A - Cable laying quality analysis monitoring system - Google Patents
Cable laying quality analysis monitoring system Download PDFInfo
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- CN114112157A CN114112157A CN202111373098.1A CN202111373098A CN114112157A CN 114112157 A CN114112157 A CN 114112157A CN 202111373098 A CN202111373098 A CN 202111373098A CN 114112157 A CN114112157 A CN 114112157A
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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
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
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Abstract
The invention discloses a cable laying quality analysis monitoring system, which comprises a first speed uniformity detection device for detecting the speed of a cable laying end; and a vertical side pressure detecting device for detecting the pressure detection of the vertical side of the cable before the cable enters the shaft; and a horizontal side pressure detecting device for detecting the horizontal side pressure detection of the cable after the cable enters the shaft; and the second speed uniformity detection device and the third speed detection device are arranged in the cable tunnel. The invention can collect the dynamic change of the horizontal dynamic lateral stress of the cable and the change of the laying speed, the cable structure stress and other data in the dynamic laying process of the cable when laying the cable from the ground to a working well and at the turning position of the working well gallery, thereby obtaining the cable form change of the cable in the horizontal X axis and the vertical Y axis, and further carrying out the timely adjustment and eliminating the laying risk possibly existing in the cable.
Description
Technical Field
The invention relates to the technical field of cable laying, in particular to a cable laying quality analysis monitoring system.
Background
Aiming at the corresponding national standard, row standard and enterprise standard in the laying standard of the extra-high voltage cable, the special stress range for the lateral pressure on the cable is specified in the laying process of the extra-high voltage cable; the ultrahigh-voltage cable is laid from the ground to a working well, and the cable laying trend at the turning position of the working well gallery is along, and in the dynamic laying process of the cable, the dynamic change of the horizontal direction dynamic lateral stress exists, and the cable form change of the cable in the horizontal X axis and the vertical direction Y axis is caused due to the change of data such as laying speed, cable structure stress and the like, so that the cable laying risk is easy to occur. We have therefore developed this and propose a cable laying quality analysis monitoring system.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a cable laying quality analysis monitoring system, which comprises a first speed uniformity detection device for detecting the speed of a cable laying end; and a vertical side pressure detecting device for detecting the pressure detection of the vertical side of the cable before the cable enters the shaft; and a horizontal side pressure detecting device for detecting the horizontal side pressure detection of the cable after the cable enters the shaft; and the second speed uniformity detection device and the third speed detection device are arranged in the cable tunnel.
As a preferred technical solution of the present invention, the first speed uniformity detecting device includes a bottom plate, the bottom plate is provided with a bottom supporting plate having an arched top, the bottom plate is provided with bases at two ends of the bottom supporting plate, one base is provided with a first speed measuring rotating shaft which is vertically upward, the other base is provided with a second speed measuring rotating shaft which is vertically upward, and the cable is wound around between the first speed measuring rotating shaft and the second speed measuring rotating shaft; and a first data processing device electrically connected with the first speed measuring rotating shaft and the second speed measuring rotating shaft is arranged on the outer side of the base.
As a preferred embodiment of the present invention, the second speed uniformity detector and the third speed uniformity detector have the same structure as the first speed uniformity detector.
As a preferred technical scheme of the invention, the vertical side pressure detection device comprises a base plate and a pulley, wherein two ends of the base plate are provided with supporting seats, two ends of the pulley are respectively provided with a cross rod, the supporting seats are provided with a chute for the vertical sliding of the cross rod up and down, the top of each supporting seat is provided with a sealing cover for sealing the chute, the supporting seat on one side is provided with a positioning plate, the positioning plate is provided with a pressure sensor, and the pressure sensor is provided with a detection rod fixedly connected with the cross rod; and a second data processing device electrically connected with the pressure sensor is arranged on the supporting seat on the other side.
As a preferred aspect of the present invention, the method for detecting the vertical side pressure of the vertical side pressure detecting device is characterized in that the formula for calculating the side pressure of the roller against the cable is as follows: p is approximately equal to 2T sin theta/2, wherein sin theta/2 is S/2R, and p is TS/R; where p is the lateral pressure, unit: n or kN; r is the arc radius of corner gyro wheel setting, unit: m; θ is the average angle of intersection between the rollers, in units: rad (radians); s is the distance between the rollers; t is the cable pulling force.
In a preferred embodiment of the present invention, when the installation is performed at a right angle and n rollers are uniformly arranged, the spacing between the rollers can be calculated by using the following approximate formula, i.e., S ═ pi R/2(n-1), and p ═ pi T/2 (n-1).
As a preferred technical scheme of the invention, the horizontal side pressure detection device comprises a base frame, wherein a vertical pressure detection mechanism for performing vertical pressure detection on a cable is arranged on the base frame, a lateral pressure detection mechanism for performing lateral pressure detection on the cable is also arranged on the base frame, the vertical pressure detection mechanism comprises a first pressure detection assembly fixed on the base frame, a first pressure detection laminate is arranged on the first pressure detection assembly, a first detection frame is arranged on the first pressure detection laminate, and first rotating rollers are respectively arranged on the upper side and the lower side of the first detection frame; a first channel for the cable to pass through is formed between the two first rotating rollers; the lateral pressure detection mechanism comprises a second pressure detection assembly fixed on the base frame, a second pressure detection layer plate is arranged on the second pressure detection assembly, a second detection frame is arranged on the second pressure detection layer plate, second rotating rollers which are vertically arranged are arranged on the left side and the right side of the second detection frame, a second channel is formed between the two second rotating rollers, and the first channel and the second channel are in butt joint; and a signal processing device electrically connected with the first pressure detection assembly and the second pressure detection assembly is arranged on one side of the base frame.
As a preferred technical solution of the present invention, the lateral pressure detecting mechanism and the vertical pressure detecting mechanism respectively detect a vertical pressure and a lateral pressure during a cable laying process, and when the detected vertical pressure or lateral pressure is greater than a critical value, the signal processing device emits an alarm sound.
As a preferred embodiment of the present invention, the threshold value is set by setting a lateral pressure of the cable sliding through the arc-shaped sliding plate at a turn as p ═ T/R, where T is a cable traction force and R is a cable bending radius;
when laying in the shaft, p → Pmax ═ Fmax/R;
fmax-maximum longitudinal tension of the cable.
As a preferable embodiment of the present invention, the cable traction T is calculated by a method in which when the horizontal straight line is laid, T is 9.8 μ WL;
when the cable is laid in a horizontal turning way: t is2＝T1eμθWherein T1 and T2 are respectively the traction force before and after turning;
when the vertical bending laying is carried out, when the convex curved surface is in a rising state,
T2＝[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]+T1 eμπ/2wherein θ is pi/2;
when the state is a descending state of the convex curved surface,
T2＝[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]+T1 eμπ/2wherein θ is π/2;
when the concave curved surface is in a rising state,
T2＝T1 eμπ/2-[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]wherein θ is π/2;
when the state is a descending state of the concave curved surface,
T2＝T1 eμπ/2-[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]wherein θ is π/2;
when the cable is vertically laid, Tmax is 9.8 Wh;
wherein T is the tractive effort, unit: n; t1 and T2 are respectively the traction force before and after turning, the unit is: n; mu is a friction coefficient; θ is the angle of turn or tilt, expressed in "radians"; w is the mass per unit length of the cable, potential: kg/m; l is cable length, unit: and m is selected.
The invention has the beneficial effects that:
1. this kind of cable laying quality analysis monitoring system lays to the worker's well on ground to and the cable laying trend of worker's well gallery turning, the dynamic laying in-process of cable, can gather the dynamic change of the horizontal direction dynamic side direction atress of cable, and gather the change to data such as laying speed and cable structure stress, thereby obtain the cable at horizontal X axle and the axial cable form change of vertical direction Y, thereby carry out timely adjustment, the risk of laying that probably exists during the elimination cable.
2. This kind of cable laying quality analysis monitoring system carries out multiple spot position to the cable laying in-process through setting up a plurality of degree of consistency detection device and detects, and is convenient for carry out accurate the detection to cable laying's speed to the risk of laying that probably exists when eliminating the cable.
3. According to the cable laying quality analysis monitoring system, the vertical side pressure detection device is arranged to detect the vertical side pressure detection of the cable before the cable enters the vertical shaft, so that the cable laying work can be adjusted in time, and the laying risk possibly existing in the cable laying process is eliminated.
4. In the cable laying quality analyzing and monitoring system, a vertical pressure detection mechanism for detecting the vertical pressure of a cable is arranged on a base frame, and a lateral pressure detection mechanism for detecting the lateral pressure of the cable is also arranged on the base frame, wherein the lateral pressure detection mechanism and the vertical pressure detection mechanism respectively detect the vertical pressure and the lateral pressure in the cable laying process, which is beneficial for an operator to know the cable form changes of the horizontal X axis and the vertical Y axis in the cable laying process in time, thereby timely adjusting, eliminating laying risks possibly existing in the process of cables, calculating a critical value of vertical pressure or lateral pressure by a characteristic detection method, when the detected vertical pressure or lateral pressure is larger than a critical value, the signal processing device gives out an alarm sound, so that the safety of the cable is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a cable laying quality analyzing and monitoring system according to the present invention;
FIG. 2 is a schematic structural diagram of a first speed uniformity detection device of a cable laying quality analysis monitoring system according to the present invention;
FIG. 3 is a schematic structural diagram of a vertical side pressure detecting device of the cable laying quality analyzing and monitoring system according to the present invention;
FIG. 4 is a schematic structural diagram of a lateral pressure detection mechanism of a cable laying quality analysis monitoring system according to the present invention;
fig. 5 is a schematic structural diagram of a vertical pressure detection mechanism of a cable laying quality analysis monitoring system according to the present invention.
In the figure: 1. a first velocity uniformity detection device; 101. a base plate; 102. a bottom pallet; 103. a base; 104. a first speed measuring rotating shaft; 105. a second speed measuring rotating shaft; 106. a first data processing device; 2. a vertical side pressure detecting device; 201. a substrate; 203. a pulley; 204. a cross bar; 205. a chute; 206. sealing the cover; 207. positioning a plate; 208. a pressure sensor; 209. a detection lever; 3. a horizontal side pressure detecting device; 301. a base frame; 302. a vertical pressure detection mechanism; 303. a lateral pressure detection mechanism; 304. a first pressure detection assembly; 305. a first pressure detection laminate; 306. a first detection frame; 307. a first rotating roller; 308. a second pressure sensing assembly; 309. a second pressure detection laminate; 310. a second detection frame; 311. a second rotating roller; 312. a signal processing device.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1 to 5, the cable laying quality analyzing and monitoring system of the present invention includes a first speed uniformity detecting device 1 for detecting a speed of a cable laying end; and a vertical side pressure detecting device 2 for detecting the pressure detection of the vertical side of the cable before the cable enters the shaft; and a horizontal side pressure detecting device 3 for detecting the horizontal side pressure detection of the cable after the cable enters the shaft; and a second speed uniformity detection device 4 and a third speed detection device 5 are arranged in the cable tunnel. Laying to the worker well on ground to and the cable laying trend of worker well gallery turning, the developments of cable lay the in-process, can gather the dynamic change of the horizontal direction developments side direction atress of cable, and gather the change of data such as laying speed and cable structure stress, thereby obtain the cable at horizontal X axle and the axial cable form change of vertical direction Y, thereby carry out timely adjustment, the risk of laying that probably exists during the elimination cable.
The first speed uniformity detection device 1 comprises a bottom plate 101, wherein a bottom supporting plate 102 with an arched top is arranged on the bottom plate 101, bases 103 are respectively arranged at two ends of the bottom supporting plate 102 of the bottom plate 101, a first speed measurement rotating shaft 104 which is vertically upward is arranged on one base 103, a second speed measurement rotating shaft 105 which is vertically upward is arranged on the other base 103, and the cable bypasses between the first speed measurement rotating shaft 104 and the second speed measurement rotating shaft 105; a first data processing device 106 electrically connected with the first speed measuring rotating shaft 104 and the second speed measuring rotating shaft 105 is installed on the outer side of one base 103.
The second speed uniformity detecting device 4 and the third speed uniformity detecting device 5 have the same structure as the first speed uniformity detecting device 1. Carry out the multiple spot position through setting up a plurality of degree of consistency detection devices and detect among the cable laying process, and be convenient for carry out accurate the detection to cable laying's speed to the risk of laying that probably exists when eliminating the cable.
The vertical side pressure detection device 2 comprises a base plate 201 and a pulley 202, wherein two ends of the base plate 201 are provided with supporting seats 203, two ends of the pulley 202 are respectively provided with a cross bar 204, the supporting seats 203 are provided with sliding grooves 205 for the vertical sliding of the cross bar 204 up and down, the top of each supporting seat 203 is provided with a sealing cover 206 for sealing the corresponding sliding groove 205, one side of each supporting seat 203 is provided with a positioning plate 207, the positioning plate 207 is provided with a pressure sensor 208, and the pressure sensor 208 is provided with a detection rod 209 fixedly connected with the cross bar; and a second data processing device electrically connected with the pressure sensor 208 is arranged on the other side of the supporting seat 203. The vertical side pressure detection device is arranged to detect the vertical side pressure detection of the cable before the cable enters the vertical shaft, so that the cable laying work can be adjusted in time, and the laying risk possibly existing in the cable laying process is eliminated.
The detection method of the vertical side pressure detection device is that the side pressure calculation formula of the roller to the cable is as follows: p is approximately equal to 2T sin theta/2, wherein sin theta/2 is S/2R, and p is TS/R; where p is the lateral pressure, unit: n or kN; r is the arc radius of corner gyro wheel setting, unit: m; θ is the average angle of intersection between the rollers, in units: rad (radians); s is the distance between the rollers; t is the cable pulling force.
When the laying is at right angles to a turn and n rollers are uniformly arranged, the spacing between the rollers can be calculated by the following approximate formula, namely S-pi R/2(n-1), and p-pi T/2 (n-1).
The horizontal side pressure detection device 3 comprises a base frame 301, a vertical pressure detection mechanism 302 for performing vertical pressure detection on a cable is arranged on the base frame 301, a lateral pressure detection mechanism 303 for performing lateral pressure detection on the cable is further arranged on the base frame 301, the vertical pressure detection mechanism 303 comprises a first pressure detection assembly 304 fixed on the base frame 301, a first pressure detection layer plate 305 is arranged on the first pressure detection assembly 304, a first detection frame 306 is arranged on the first pressure detection layer plate 305, and first rotating rollers 307 are arranged on the upper side and the lower side of the first detection frame 306; a first channel for passing the cable is formed between the two first rotating rollers 307; the lateral pressure detection mechanism 303 comprises a second pressure detection assembly 308 fixed on the base frame 301, a second pressure detection layer plate 309 is arranged on the second pressure detection assembly 308, a second detection frame 310 is arranged on the second pressure detection layer plate 309, second rotating rollers 311 vertically arranged are arranged on the left side and the right side of the second detection frame 310, a second channel is formed between the two second rotating rollers 311, and the first channel and the second channel are in butt joint; a signal processing device 312 electrically connected with the first pressure detection assembly 304 and the second pressure detection assembly 308 is arranged on one side of the base frame 301.
The lateral pressure detection mechanism 303 and the vertical pressure detection mechanism 302 respectively detect the vertical pressure and the lateral pressure in the cable laying process, and when the detected vertical pressure or the detected lateral pressure is greater than a critical value, the signal processing device sends out an alarm sound.
The critical value is set by the method that when the cable slides through the arc-shaped sliding plate at a turning position, the lateral pressure is p ═ T/R, wherein T is cable traction force, and R is cable bending radius;
when laying in the shaft, p → Pmax ═ Fmax/R;
fmax-maximum longitudinal tension of the cable.
The method for calculating the cable traction force T is that when horizontal straight line laying is carried out, T is 9.8 μ WL;
when the cable is laid in a horizontal turning way: t is2＝T1eμθWherein T1 and T2 are respectively the traction force before and after turning;
when the vertical bending laying is carried out, when the convex curved surface is in a rising state,
T2＝[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]+T1 eμπ/2wherein θ is pi/2;
when the state is a descending state of the convex curved surface,
T2＝[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]+T1 eμπ/2wherein θ is π/2;
when the concave curved surface is in a rising state,
T2＝T1 eμπ/2-[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]wherein θ is π/2;
when the state is a descending state of the concave curved surface,
T2＝T1 eμπ/2-[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]wherein θ is π/2;
when the cable is vertically laid, Tmax is 9.8 Wh;
wherein T is the tractive effort, unit: n or kN; t1 and T2 are respectively the traction force before and after turning, the unit is: n or kN; mu is a friction coefficient; θ is the angle of turn or tilt, expressed in "radians"; w is the mass per unit length of the cable, potential: kg/m; l is cable length, unit: m or km.
The vertical pressure detection mechanism is arranged on the base frame and used for detecting the vertical pressure of the cable, the lateral pressure detection mechanism is also arranged on the base frame and used for detecting the lateral pressure of the cable, the lateral pressure detection mechanism and the vertical pressure detection mechanism respectively detect the vertical pressure and the lateral pressure in the cable laying process, an operator can know the cable form change of a horizontal X axis and a vertical Y axis in the cable laying process in time, and therefore timely adjustment is conducted, laying risks possibly existing in the cable are eliminated, the critical value of the vertical pressure or the lateral pressure is obtained through the characteristic detection method, when the detected vertical pressure or the detected lateral pressure is larger than the critical value, the signal processing device sends out an alarm sound, and therefore the safety in the cable laying process is guaranteed.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a cable laying quality analysis monitoring system which characterized in that: the device comprises a first speed uniformity detection device (1) for detecting the speed of a cable pay-off end; and a vertical side pressure detecting device (2) for detecting the pressure detection of the vertical side of the cable before the cable enters the shaft; and a horizontal side pressure detecting device (3) for detecting the horizontal side pressure detection of the cable after the cable enters the shaft; and the second speed uniformity detection device (4) and the third speed detection device (5) are arranged in the cable tunnel.
2. The cable laying quality analyzing and monitoring system according to claim 1, wherein the first speed uniformity detecting device (1) comprises a bottom plate (101), a bottom supporting plate (102) with an arched top is arranged on the bottom plate (101), bases (103) are respectively arranged at two ends of the bottom supporting plate (102) of the bottom plate (101), a first speed measuring rotating shaft (104) which is vertically upward is arranged on one base (103), a second speed measuring rotating shaft (105) which is vertically upward is arranged on the other base (103), and the cable bypasses between the first speed measuring rotating shaft (104) and the second speed measuring rotating shaft (105); and a first data processing device (106) electrically connected with the first speed measuring rotating shaft (104) and the second speed measuring rotating shaft (105) is arranged on the outer side of one base (103).
3. A cabling quality analysis monitoring system according to claim 1, wherein said second speed uniformity testing means (4) and third speed testing means (5) are of the same construction as the first speed uniformity testing means (1).
4. The cable laying quality analyzing and monitoring system according to claim 2, wherein the vertical side pressure detecting device (2) comprises a base plate (201) and a pulley (202), two ends of the base plate (201) are provided with supporting seats (203), two ends of the pulley (202) are provided with cross bars (204), the supporting seats (203) are provided with sliding grooves (205) for the cross bars (204) to vertically slide up and down, the top of the supporting seats (203) is provided with a sealing cover (206) for sealing the sliding grooves (205), one side of the supporting seats (203) is provided with a positioning plate (207), the positioning plate (207) is provided with a pressure sensor (208), and the pressure sensor (208) is provided with a detecting rod (209) fixedly connected with the cross bars; and a second data processing device electrically connected with the pressure sensor (208) is arranged on the supporting seat (203) on the other side.
5. The system for analyzing and monitoring the quality of cable laying according to claim 2, wherein the vertical side pressure of the vertical side pressure detecting device is detected by calculating the side pressure of the roller on the cable according to the formula: p is approximately equal to 2T sin theta/2, wherein sin theta/2 is S/2R, and p is TS/R; where p is the lateral pressure, unit: n or kN; r is the arc radius of corner gyro wheel setting, unit: m; θ is the average angle of intersection between the rollers, in units: rad (radians); s is the distance between the rollers; t is the cable pulling force.
6. A cable laying quality analysis monitoring system according to claim 5, wherein when laying is at right angles to a turn and n rollers are uniformly arranged, the spacing between the rollers is calculated using the following approximate formula, i.e. where S is π R/2(n-1) and p is π T/2 (n-1).
7. The cable laying quality analyzing and monitoring system according to claim 1, wherein the horizontal side pressure detecting device (3) comprises a base frame (301), a vertical pressure detecting mechanism (302) for detecting the vertical pressure of the cable is arranged on the base frame (301), a lateral pressure detecting mechanism (303) for detecting the lateral pressure of the cable is further arranged on the base frame (301), the vertical pressure detecting mechanism (303) comprises a first pressure detecting assembly (304) fixed on the base frame (301), a first pressure detecting laminate (305) is arranged on the first pressure detecting assembly (304), a first detecting frame (306) is arranged on the first pressure detecting laminate (305), and first rotating rollers (307) are respectively arranged on the upper side and the lower side of the first detecting frame (306); a first channel for passing the cable is formed between the two first rotating rollers (307); the lateral pressure detection mechanism (303) comprises a second pressure detection assembly (308) fixed on the base frame (301), a second pressure detection layer plate (309) is arranged on the second pressure detection assembly (308), a second detection frame (310) is arranged on the second pressure detection layer plate (309), second rotating rollers (311) which are vertically arranged are arranged on the left side and the right side of the second detection frame (310), a second channel is formed between the two second rotating rollers (311), and the first channel and the second channel are in butt joint; and a signal processing device (312) electrically connected with the first pressure detection assembly (304) and the second pressure detection assembly (308) is arranged on one side of the base frame (301).
8. The system for analyzing and monitoring the laying quality of the cable according to claim 7, wherein the lateral pressure detection mechanism (303) and the vertical pressure detection mechanism (302) respectively detect the vertical pressure and the lateral pressure during the laying process of the cable, and the signal processing device gives an alarm when the detected vertical pressure or the detected lateral pressure is greater than a critical value.
9. A cabling quality analysis monitoring system according to claim 8, wherein said threshold is set by setting the lateral pressure of the cable as it slides through the arcuate slider at a bend at p-T/R, where T is cable pull and R is cable bend radius;
when laying in the shaft, p → Pmax ═ Fmax/R;
fmax-maximum longitudinal tension of the cable.
10. A cabling quality analysis monitoring system according to claim 9, wherein said cable tractive effort T is calculated by, when laying a horizontal straight line, T-9.8 μ WL;
when the cable is laid in a horizontal turning way: t is2＝T1eμθWherein T1 and T2 are respectively the traction force before and after turning;
when the vertical bending laying is carried out, when the convex curved surface is in a rising state,
T2＝[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]+T1eμπ/2wherein θ is μ/2;
when the state is a descending state of the convex curved surface,
T2＝[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]+T1eμπ/2wherein θ is π/2;
when the concave curved surface is in a rising state,
T2＝T1eμπ/2-[9.8WR/(1+μ2)][2μ-(1-μ2)eμπ/2]wherein θ is π/2;
when the state is a descending state of the concave curved surface,
T2＝T1eμπ/2-[9.8WR/(1+μ2)][(1-μ2)+2μeμπ/2]wherein θ is π/2;
when the cable is vertically laid, Tmax is 9.8 Wh;
wherein T is the tractive effort, unit: n (or kN); t1 and T2 are respectively the traction force before and after turning, the unit is: n (or kN); mu is a friction coefficient; θ is the angle of turn or tilt, expressed in "radians"; w is the mass per unit length of the cable, potential: kg/m; l is cable length, unit: m (or km).
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|---|---|---|---|
| CN202111373098.1A CN114112157A (en) | 2021-11-19 | 2021-11-19 | Cable laying quality analysis monitoring system |
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| CN202111373098.1A CN114112157A (en) | 2021-11-19 | 2021-11-19 | Cable laying quality analysis monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114491895A (en) * | 2022-04-01 | 2022-05-13 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
| CN115164987A (en) * | 2022-07-07 | 2022-10-11 | 国网福建省电力有限公司漳平市供电公司 | Cable laying multipoint speed uniformity acquisition and monitoring system |
-
2021
- 2021-11-19 CN CN202111373098.1A patent/CN114112157A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114491895A (en) * | 2022-04-01 | 2022-05-13 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
| CN114491895B (en) * | 2022-04-01 | 2022-08-30 | 广东电网有限责任公司东莞供电局 | Cable laying stress analysis method and device |
| CN115164987A (en) * | 2022-07-07 | 2022-10-11 | 国网福建省电力有限公司漳平市供电公司 | Cable laying multipoint speed uniformity acquisition and monitoring system |
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