CN105241769A - Dynamic loading device and dynamic loading method for concrete pole - Google Patents
Dynamic loading device and dynamic loading method for concrete pole Download PDFInfo
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- CN105241769A CN105241769A CN201510786432.4A CN201510786432A CN105241769A CN 105241769 A CN105241769 A CN 105241769A CN 201510786432 A CN201510786432 A CN 201510786432A CN 105241769 A CN105241769 A CN 105241769A
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Abstract
The invention relates to a dynamic loading device for a concrete pole. The dynamic loading device comprises a steel wire rope with one end fixed at the top of a concrete pole, and a cam mechanism used for dynamically dragging the steel wire rope, wherein the other end of the steel wire rope is fixed on the ground by a plurality of guide wheels longitudinally fixed at intervals; the guide wheels are fixed at the side of the concrete pole by a bracket; a tension sensor is connected to the steel wire rope in series and is electrically connected with a control unit; the cam mechanism comprises a fixed rack and a bi-directional screw rod arranged along the length direction of the fixed rack, a semi-elliptoid cam is fixed on each of two sliding nuts positioned on the bi-directional screw rod, the two cams are symmetric relative to the center of the fixed rack and can move along the fixed rack; the fixed rack is driven to rotate by a motor, and the rotating center overlaps with the center of the fixed rack. The dynamic loading device has the benefits that dynamic loading is carried out on a concrete pole or a like pole object fixed at the bottom so as to simulate the capacity of the loading device in bearing dynamic load such as typhoon.
Description
Technical field
The present invention relates to a kind of cement electric pole dynamic loading device and loading method, be applicable to carry out dynamic load to the fixing cement electric pole in bottom or similar shaft, simulate the ability that it bears dynamic load.
Background technology
In transmission and distribution networks, often there is the bulk phenomenon of falling bar due to typhoon effect in cement electric pole, and particularly in coastland, this situation can be more serious.Cement electric pole is by typhoon prostrated, and a kind of situation is the insufficient strength due to cement electric pole, ruptures under the effect of violent typhoon, and another kind of situation is because cement electric pole ground occurs to loosen under typhoon effect, easily causes collapsing of cement electric pole.No matter which kind of situation, electric line all may be caused to rupture, injure people by a crashing object, even produce other more serious consequence.For this reason, certain technological means must be taked, check actual power transmission and distribution cement electric pole whether can stand the typhoon grade of setting.The stressed effect of cement electric pole under typhoon effect, both can be equivalent to certain static force the stressed effect of typhoon to cement electric pole, also can be equivalent to the repeated action of dynamic force.If apply a certain static force to cement electric pole, its action effect is identical with the action effect of typhoon, so by artificially loading this specific static(al) to cement electric pole, just can play the effect whether inspection cement electric pole is toppled over or ruptured.If apply the dynamic force of a certain frequency and amplitude to cement electric pole, its action effect is identical with the action effect of typhoon, so by artificially applying the load with this frequency and amplitude characteristic to cement electric pole, the effect whether inspection cement electric pole can topple over or rupture can be played too.In the static equivalent loading of cement electric pole, patent (utility model: ZL201320721531, patent of invention: CN201310569485) gives specific design scheme and the loading method of charger.Due in static loading process, the thrust being applied to cement electric pole remains unchanged or changes very slow, can not reflect the dynamic effect that typhoon acts on cement electric pole.Typhoon itself has certain frequency characteristic, static loading is owing to cannot reflect the transition attribute of typhoon, be difficult to reach the action effect same with typhoon, therefore adopt the action effect of static loading method assessment typhoon to cement electric pole unsatisfactory, also need research trends loading method.
Summary of the invention
The object of the invention is for above weak point, provide a kind of cement electric pole dynamic loading device and loading method, realize the dynamic load that simulation cement electric pole can bear.
The scheme that technical solution problem of the present invention adopts is: a kind of cement electric pole dynamic loading device, comprise the wire rope that cement electric pole top is fixed in one end, the other end of described wire rope is fixed on ground through the angle sheave that several longitudinal separation is fixing, and the fixed position of the height and wire rope and cement electric pole that are positioned at the angle sheave of highest point is in sustained height; Described angle sheave is fixed on the side of cement electric pole through a support; Described wire rope is also serially connected with a pulling force sensor, and described pulling force sensor is electrically connected with a control module; Also comprise one for dynamically pulling the cam mechanism of described wire rope, described cam mechanism comprises a fixed mount, is provided with a Bidirectional-screw along fixed mount length direction, be positioned on two sliding nuts on Bidirectional-screw and be fixed with the elliptoid cam of half respectively, two cams relative to described fixed mount Central Symmetry, and move along described fixed mount; Described fixed mount drives through a motor and rotates, and the center superposition of rotation center and described fixed mount.
Further, the center fixed cover of described fixed mount is connected to one speed reducer, and described speed reduction unit is connected with described motor.
Further, described cam outer rim is circumferentially provided with groove, and described wire rope is pressed in described groove.
Further, the center of described fixed mount overlaps with the mid point of two cam summit lines, and the central axis of described reducer output shaft is vertical with two cam summit lines.
Further, the both sides of described fixed mount are respectively equipped with guide rail along its length, and described cam holder is located on described guide rail and is moved along described guide rail.
Further, described Bidirectional-screw is arranged in the middle part of described fixed mount and bearing seat through being positioned at fixed mount two ends is fixed, and described Bidirectional-screw wherein one end is provided with one for the handle of manual rotation Bidirectional-screw through described bearing seat.
Further, also comprise a signal acquisition process module, described pulling force sensor is electrically connected with control module through signal acquisition process module, and described motor is electrically connected with described control module through a motor drive module.
Further, also comprise one for showing the display module of the current rotating speed of motor and current pulling force sensor output value of thrust, described display module is connected with described control module.
The present invention also provides a kind of loading method of cement electric pole dynamic loading device as described above, comprises the following steps:
Step S1: according to typhoon grade, cement electric pole height and loading application point, calculate the minimum value of dynamic load power, maximal value and loading frequency;
Step S2: the original state of setting wire rope;
Step S20: rotate Bidirectional-screw by a rotary handle, adjustment is positioned at the distance of two sliding nuts on Bidirectional-screw, make the line on two cam summits the shortest, wire rope is pressed in the groove of cam outer rim, and make fixed mount around its center rotating by control module drive motor, make wire rope and cam contact point the shortest to fixed mount centre distance, stop drive motor, fixed mount center is rotation center;
Step S21: pretension wire rope, make wire rope pretightning force equal the minimum value of dynamic load power, now wire rope is in original state;
Step S3: the state of saturation of setting wire rope;
Step S31: rotated by control module drive motor, observes the value of thrust of pulling force sensor simultaneously, when value of thrust reaches maximum, motor is stopped to run, if this pulling force maximal value reaches the maximal value of required dynamic load power, then wire rope is in state of saturation, goes to step S4; Otherwise go to step S32;
Step S32: rotate Bidirectional-screw, makes cam along guide rail in fixed mount oppositely movement, observes the value of thrust of pulling force sensor simultaneously;
Step S33: if when the value of thrust of wire rope reaches the maximal value of dynamic load power, stop the rotation Bidirectional-screw, and now wire rope is in state of saturation; Otherwise go to step S32;
Step S4: the rotating speed determining motor; If motor speed is n rpm, speed reduction unit reduction gear ratio is
, then dynamic load frequency is
, after determining loading force frequency, motor speed n can be obtained accordingly;
Step S5: drive fixed mount continuous rotation by control module according to rotating speed n drive motor, dynamic load is carried out to cement electric pole, and record the delta data of lineoutofservice signal pull and loading force in loading procedure.
Compared with prior art, the present invention has following beneficial effect: for a certain towards typhoon, when acting on cement electric pole, its dynamic force produced, it may be only the pulsating quantity of this wind direction, and can not produce there is forward and reverse alternating force, that is, cement electric pole is unidirectional by typhoon acting force.Based on this, the present invention proposes to adopt wire rope to carry out the loading (wire rope can only bear pulling force, can not bear pressure) of dynamic loading.Wire rope has flexibility, change wire rope trend, and lineoutofservice signal pull can't change by angle sheave is convenient along with the change of wire rope trend, and this be that the design and installation of charger provide convenience, reduces the requirement to loading place.Cam mechanism is continuous rotation under driven by motor, thus drives tightness of steel wire rope alternately, makes cement electric pole generation to the to-and-fro movement in lineoutofservice signal pull direction.The benefit of this method is, power source is when continuous rotation (but not frequent forward and reverse switching), and achieve the to-and-fro movement to cement electric pole dynamic load, dynamic load power amplitude range is adjustable, significantly improve the life-span of power source, also improve the dirigibility of this charger.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, patent of the present invention is further illustrated.
Fig. 1 is the structural drawing of cement electric pole dynamic loading device of the present invention.
Fig. 2 is the structural representation of cam mechanism of the present invention.
Fig. 3 a is the state that cam of the present invention is in level;
Fig. 3 b is state in wire rope of the present invention press-in cam groove;
Fig. 3 c is wire rope Pre strained state of the present invention;
Cam vertical state when Fig. 3 d is motor of the present invention rotation;
Fig. 3 e is that the present invention makes Bidirectional-screw adjust the state of cam spacing by rotary handle.
In figure: 1-cement electric pole; 2-wire rope; 3-angle sheave; 4-motor; 5-speed reduction unit; 6-cam; 7-pulling force sensor; 8-fixed mount; 9-guide rail; 10-Bidirectional-screw.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
As shown in Fig. 1 ~ 2, a kind of cement electric pole dynamic loading device, comprise the wire rope 2 that cement electric pole 1 top is fixed in one end, the other end of described wire rope 2 is fixed on ground through the angle sheave 3 that several longitudinal separation is fixing, and the height and the wire rope 2 that are positioned at the angle sheave 3 of highest point are in sustained height with the fixed position of cement electric pole 1; Described angle sheave 3 is fixed on the side of cement electric pole 1 through a support; Described wire rope 2 is also serially connected with a pulling force sensor 7, described pulling force sensor 7 is electrically connected with a control module; Also comprise one for dynamically pulling cam 6 mechanism of described wire rope 2, described cam 6 mechanism comprises a fixed mount 8, is provided with a Bidirectional-screw 10 along fixed mount 8 length direction, be positioned on two sliding nuts on Bidirectional-screw 10 and be fixed with the elliptoid cam 6 of half respectively, two cams 6 relative to described fixed mount 8 Central Symmetry, and move along described fixed mount 8; Described fixed mount 8 drives through a motor 4 and rotates, and the center superposition of rotation center and described fixed mount 8.
In actual loaded device, the number of its angle sheave 3 can be arranged with place mounting condition according to actual needs flexibly, but the height being positioned at the angle sheave 3 of highest point needs to be fixed on cement electric pole 1 apical position with wire rope 2 is in sustained height, wire rope 2 is in 90 ° with cement electric pole 1, such guarantee is when pulling force is constant, and the moment produced cement electric pole 1 is maximum.From the foregoing, the present invention is fixed by wire rope 2 and cement electric pole 1, and wire rope 2 has flexibility, and the convenient wire rope 2 that changes moves towards, and therefore this charger can change the direction of acting force flexibly.Wire rope 2 produces dynamic load power and realizes carrying out reciprocal tension motion according to the frequency of setting by described cam 6 mechanism, make power source when continuous rotation (but not frequent positive anti-switching), achieve adjustable dynamically the loading continuously of power amplitude, significantly improve the life-span of power source, also improve the dirigibility of this charger.
Further, the center fixed cover of described fixed mount 8 is connected to one speed reducer 5, and described speed reduction unit 5 is connected with described motor 4.Speed reduction unit 5 plays increases the slow-revving effect of torque drop, and such as reduction gear ratio gets 80, and motor 4 rotating speed is 3000 revs/min, then loading frequency is 1.25Hz, because the power spectral energies of typhoon mainly concentrates within 1Hz, therefore, such one group of conventional parameter design can meet the requirement of dynamic load.
Further, described cam 6 outer rim is circumferentially provided with groove, and described wire rope 2 is pressed in described groove.
Further, the center of described fixed mount 8 overlaps with the mid point of two cam 6 summit lines, and the central axis of described speed reduction unit 5 output shaft is vertical with two cam 6 summit lines.Guarantee that the pulling force that good cam 6 pairs of wire rope 2 produce has symmetry.
Further, the both sides of described fixed mount 8 are respectively equipped with guide rail 9 along its length, and described cam 6 is set up on described guide rail 9 and moves along described guide rail 9.
Further, described Bidirectional-screw 10 is arranged in the middle part of described fixed mount 8 and bearing seat through being positioned at fixed mount 8 two ends is fixed, and described Bidirectional-screw 10 wherein one end is provided with one for the handle of manual rotation Bidirectional-screw 10 through described bearing seat.The sliding nut of Bidirectional-screw 10 is trapezium structure, has auto-lock function, and when motor 4 rotates, the distance between two cams 6 remains unchanged.
Further, also comprise a signal acquisition process module, described pulling force sensor 7 is electrically connected with control module through signal acquisition process module, and described motor 4 is electrically connected with described control module through motor 4 driver module.
Further, also comprise one to export value of thrust display module for showing the current rotating speed of motor 4 and current pulling force sensor 7, described display module is connected with described control module.Described control module can adopt PC, industrial computer or other embedded controllers, and signal acquisition process module carries out the process such as AD conversion, amplification, filtering to sensor signal, and the data after conversion are shown after control module in display module; Control module output order controls to the rotating speed of motor 4 driver module to motor 4.Signal acquisition process module can adopt PCI or usb bus data collecting card, motor 4 and motor 4 driver module can adopt AC servo motor 4 and supporting driver thereof, described control module can also connect a man-machine interface, and this man-machine interface can be touch-screen or keyboard, display etc.
As shown in Fig. 3 a ~ 3e, the present invention also provides a kind of loading method of cement electric pole dynamic loading device as described above, comprises the following steps:
Step S1: according to typhoon grade, cement electric pole height and loading application point, calculate the minimum value of dynamic load power, maximal value and loading frequency;
Step S2: the original state of setting wire rope 2;
Step S20: rotate Bidirectional-screw 10 by a rotary handle, adjustment is positioned at the distance of two sliding nuts on Bidirectional-screw 10, makes the line on two cam 6 summits the shortest, as shown in Figure 3 a; Wire rope 2 is pressed in the groove of cam 6 outer rim, and make fixed mount 8 around its center rotating by control module drive motor 4, make wire rope 2 and cam 6 contact point the shortest to fixed mount 8 centre distance, stop drive motor 4, fixed mount 8 center is rotation center, as shown in Figure 3 b;
Step S21: pretension wire rope 2, make wire rope 2 pretightning force equal the minimum value of dynamic load power, now wire rope 2 is in original state, as shown in Figure 3 c;
Step S3: the state of saturation of setting wire rope 2;
Step S31: rotated by control module drive motor 4, observe the value of thrust of pulling force sensor 7 simultaneously, when pulling force reaches maximal value, stop electric machine rotation, as shown in Figure 3 d, if this pulling force maximal value has reached the maximal value of required dynamic load power, then now wire rope 2 has been in state of saturation,, go to step S4; Otherwise go to step S32;
Step S32: rotate Bidirectional-screw 10, make cam 6 along guide rail 9 in fixed mount 8 oppositely movement, observes the value of thrust of pulling force sensor 7 simultaneously;
Step S33: if when the value of thrust of wire rope 2 reaches the maximal value of dynamic load power, stop the rotation Bidirectional-screw 10, and now wire rope 2 is in state of saturation, as shown in Figure 3 e; Otherwise go to step S32;
Step S4: the rotating speed determining motor 4; If motor 4 rotating speed is n rpm, speed reduction unit 5 reduction gear ratio is
, then dynamic load frequency is
, after determining loading force frequency, motor 4 rotating speed n can be obtained accordingly;
Step S5: drive fixed mount 8 continuous rotation according to rotating speed n drive motor 4 by control module, realizes carrying out dynamic load to cement electric pole 1, records the delta data of wire rope 2 pulling force and loading force simultaneously.
In sum, a kind of cement electric pole dynamic loading device provided by the invention and loading method, can realize carrying out pulling force dynamic load by wire rope to cement pole, thus simulation cement electric pole bears the ability of typhoon.
Above-listed preferred embodiment provided by the invention; the object, technical solutions and advantages of the present invention are further described; be understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a cement electric pole dynamic loading device, it is characterized in that: comprise the wire rope that cement electric pole top is fixed in one end, the other end of described wire rope is fixed on ground through the angle sheave that several longitudinal separation is fixing, and the fixed position of the height and wire rope and cement electric pole that are positioned at the angle sheave of highest point is in sustained height; Described angle sheave is fixed on the side of cement electric pole through a support; Described wire rope is also serially connected with a pulling force sensor, and described pulling force sensor is electrically connected with a control module; Also comprise one for dynamically pulling the cam mechanism of described wire rope, described cam mechanism comprises a fixed mount, is provided with a Bidirectional-screw along fixed mount length direction, be positioned on two sliding nuts on Bidirectional-screw and be fixed with the elliptoid cam of half respectively, two cams relative to described fixed mount Central Symmetry, and move along described fixed mount; Described fixed mount drives through a motor and rotates, and the center superposition of rotation center and described fixed mount.
2. a kind of cement electric pole dynamic loading device according to claim 1, is characterized in that: the center fixed cover of described fixed mount is connected to one speed reducer, and described speed reduction unit is connected with described motor.
3. a kind of cement electric pole dynamic loading device according to claim 1, is characterized in that: described cam outer rim is circumferentially provided with groove, and described wire rope is pressed in described groove.
4. a kind of cement electric pole dynamic loading device according to claim 1, is characterized in that: the center of described fixed mount overlaps with the mid point of two cam summit lines, and the central axis of described reducer output shaft is vertical with two cam summit lines.
5. a kind of cement electric pole dynamic loading device according to claim 1, is characterized in that: the both sides of described fixed mount are respectively equipped with guide rail along its length, and described cam holder is located on described guide rail and is moved along described guide rail.
6. a kind of cement electric pole dynamic loading device according to claim 1, it is characterized in that: described Bidirectional-screw is arranged in the middle part of described fixed mount and bearing seat through being positioned at fixed mount two ends is fixed, described Bidirectional-screw wherein one end is provided with one for the handle of manual rotation Bidirectional-screw through described bearing seat.
7. a kind of cement electric pole dynamic loading device according to claim 1, it is characterized in that: also comprise a signal acquisition process module, described pulling force sensor is electrically connected with control module through signal acquisition process module, and described motor is electrically connected with described control module through a motor drive module.
8. a kind of cement electric pole dynamic loading device according to claim 7, is characterized in that: also comprise one for showing the display module of the current rotating speed of motor and current pulling force sensor output value of thrust, described display module is connected with described control module.
9. a loading method for cement electric pole dynamic loading device as claimed in claim 1, is characterized in that, comprise the following steps:
Step S1: according to typhoon grade, cement electric pole height and loading application point, calculate the minimum value of dynamic load power, maximal value and loading frequency;
Step S2: the original state of setting wire rope;
Step S20: rotate Bidirectional-screw by a rotary handle, adjustment is positioned at the distance of two sliding nuts on Bidirectional-screw, make the line on two cam summits the shortest, wire rope is pressed in the groove of cam outer rim, and make fixed mount around its center rotating by control module drive motor, make wire rope and cam contact point the shortest to fixed mount centre distance, stop drive motor, fixed mount center is rotation center;
Step S21: pretension wire rope, make wire rope pretightning force equal the minimum value of dynamic load power, now wire rope is in original state;
Step S3: the state of saturation of setting wire rope;
Step S31: rotated by control module drive motor, observes the value of thrust of pulling force sensor simultaneously, when value of thrust reaches maximum, stop electric machine rotation, if this pulling force maximal value reaches the maximal value of required dynamic load power, then wire rope is in state of saturation, goes to step S4; Otherwise go to step S32;
Step S32: rotate Bidirectional-screw, makes cam along guide rail in fixed mount oppositely movement, observes the value of thrust of pulling force sensor simultaneously;
Step S33: if when the value of thrust of wire rope reaches the maximal value of dynamic load power, stop the rotation Bidirectional-screw, and now wire rope is in state of saturation; Otherwise go to step S32;
Step S4: the rotating speed determining motor; If motor speed is n rpm, speed reduction unit reduction gear ratio is
, then dynamic load frequency is
, after determining loading force frequency, motor speed n can be obtained accordingly;
Step S5: drive fixed mount continuous rotation according to rotating speed n drive motor by control module, carries out dynamic load namely to cement electric pole, records the delta data in loading procedure of lineoutofservice signal pull and loading force simultaneously.
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| CN105738143A (en) * | 2016-03-10 | 2016-07-06 | 国网福建省电力有限公司 | Cement electric pole equivalent wind load loading device and experiment method |
| CN105865826A (en) * | 2016-06-21 | 2016-08-17 | 国网福建省电力有限公司 | Method and device for testing basic overturning resistance of fire wire conical electric pole under action of wind load |
| CN108152134A (en) * | 2017-12-12 | 2018-06-12 | 中国西电电气股份有限公司 | A kind of wall bushing cantilever loading experimental rig and test method |
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| CN110873827A (en) * | 2018-08-29 | 2020-03-10 | 西安高压电器研究院有限责任公司 | Casing rotating device and casing testing method |
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| CN105738143A (en) * | 2016-03-10 | 2016-07-06 | 国网福建省电力有限公司 | Cement electric pole equivalent wind load loading device and experiment method |
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| CN105865826A (en) * | 2016-06-21 | 2016-08-17 | 国网福建省电力有限公司 | Method and device for testing basic overturning resistance of fire wire conical electric pole under action of wind load |
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| CN108152134A (en) * | 2017-12-12 | 2018-06-12 | 中国西电电气股份有限公司 | A kind of wall bushing cantilever loading experimental rig and test method |
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| CN110873827A (en) * | 2018-08-29 | 2020-03-10 | 西安高压电器研究院有限责任公司 | Casing rotating device and casing testing method |
| CN110455639A (en) * | 2019-08-02 | 2019-11-15 | 成都航天科工微电子系统研究院有限公司 | The lever axial direction force loading device of offset is generated for guinea pig elevating lever |
| JPWO2021100139A1 (en) * | 2019-11-20 | 2021-05-27 | ||
| WO2021100139A1 (en) * | 2019-11-20 | 2021-05-27 | 日本電信電話株式会社 | Telegraph pole test device |
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| CN117387929A (en) * | 2023-12-13 | 2024-01-12 | 宁波天控五轴数控技术有限公司 | A/C swing head clamping force static and dynamic detection device |
| CN117387929B (en) * | 2023-12-13 | 2024-02-09 | 宁波天控五轴数控技术有限公司 | A/C swing head clamping force static and dynamic detection device |
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