CN112282478B - Force bearing adjusting device and power transmission tower - Google Patents
Force bearing adjusting device and power transmission tower Download PDFInfo
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- CN112282478B CN112282478B CN202011110715.4A CN202011110715A CN112282478B CN 112282478 B CN112282478 B CN 112282478B CN 202011110715 A CN202011110715 A CN 202011110715A CN 112282478 B CN112282478 B CN 112282478B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a bearing force adjusting device and a power transmission iron tower, and relates to the technical field of power transmission. The power transmission iron tower comprises a plurality of rod pieces, and the force bearing adjusting device comprises two fixing pieces, a sensor and a telescopic assembly. The two fixing pieces are respectively arranged at two axial ends of the rod piece; the sensor can detect the displacement of the fixing piece along the length direction of the rod piece; the telescopic assembly is in communication connection with the sensor, two ends of the telescopic assembly are respectively connected with the two fixing pieces, and the telescopic assembly can stretch according to a detection result of the sensor so as to exert an adjusting force opposite to the displacement direction on the fixing pieces. The bearing adjusting device can automatically repair the deformation of the rod piece caused by external force, and reduce the influence of external disturbance on the rod piece.
Description
Technical Field
The invention relates to the technical field of power transmission, in particular to a bearing force adjusting device and a power transmission iron tower.
Background
With the development of the current society, the demand for electric power energy in production and life is increasing day by day. And the energy distribution is not uniform in China, so that the establishment of long-distance high-voltage transmission lines is a trend. Due to the long transmission line and the high-voltage extra-high voltage transmission, the transmission line can be erected on a transmission iron tower to ensure the smoothness and the surrounding safety of transmission, and the maintenance difficulty of the transmission line is increased. And the stability of the power transmission iron tower becomes a problem which needs to be considered due to the fact that the power transmission iron tower is built higher and higher. The power transmission iron tower is often in a swaying state under the influence of high-altitude strong wind power, and although the swaying is slight macroscopically, the power transmission iron tower inevitably bears the load-bearing rod piece of the power transmission iron tower. The rod piece on one side of the power transmission iron tower deviated in the swinging process is subjected to extra pressure, the rod piece on the other side is subjected to extra tension, the rod piece is continuously subjected to force exceeding the force which needs to be borne during normal work in the swinging process, and the tension and the pressure are changed alternately, so that the rod piece of the power transmission iron tower is easy to fatigue, bending and even breaking are caused, and accidents are caused.
In view of the above problems, it is necessary to develop a force-bearing adjusting device and a power transmission tower so as to solve the problem of fatigue fracture of a rod member of the power transmission tower after the rod member is subjected to tensile force and pressure alternately for a long time.
Disclosure of Invention
The invention aims to provide a force bearing adjusting device and a power transmission iron tower, which can automatically repair the deformation of a rod piece caused by external force and reduce the influence of external disturbance on the rod piece.
In order to achieve the purpose, the invention adopts the following technical scheme:
a force-bearing adjusting device is used for an electric power tower, the electric power tower comprises a plurality of rod pieces, and the force-bearing adjusting device comprises:
the two fixing pieces are respectively arranged at two ends of the rod piece in the length direction;
a sensor capable of detecting displacement of the fixing member in a length direction of the rod member;
the telescopic assembly is in communication connection with the sensor, two ends of the telescopic assembly are respectively connected with the two fixing pieces, and the telescopic assembly can stretch according to a detection result of the sensor so as to exert an adjusting force opposite to the displacement direction on the fixing pieces.
Preferably, the sensor is a piezoelectric sensor, two ends of the sensor are respectively connected with the two fixing pieces, and the polarization direction of the piezoelectric sensor is consistent with the length direction of the rod piece.
Preferably, the telescopic assembly comprises a piezoelectric driving member, and the polarization direction of the piezoelectric driving member is consistent with the length direction of the rod member.
Preferably, the piezoelectric actuator further comprises a voltage amplifying assembly, wherein the voltage amplifying assembly is in communication connection with the piezoelectric sensor and the piezoelectric actuator, and can amplify the voltage generated by the piezoelectric sensor so as to increase the deformation amount of the piezoelectric actuator.
Preferably, still include the safety cover, the safety cover set up in on the member, the sensor with flexible subassembly all is located in the safety cover.
Preferably, the piezoelectric driving part is provided with a plurality of piezoelectric driving parts which are uniformly distributed between the two fixing parts.
Preferably, the force bearing adjusting device further comprises a data collecting assembly which is electrically connected with the sensor and can collect the change of the distance between the two fixing pieces.
The power transmission iron tower comprises a tower body, wherein the tower body comprises the rod piece, and the power transmission iron tower further comprises the bearing force adjusting device.
Preferably, the rod is an angle steel.
Preferably, each side wall of the angle steel is provided with one bearing adjusting device.
The invention has the beneficial effects that:
the invention provides a bearing force adjusting device and a power transmission iron tower. In the device, the member is only born the axial force, when steel pylons rocks under the effect of external force, the member of one side that steel pylons is partial to bears pressure, and the member of opposite side bears the pulling force for the member can produce certain deformation, and the sensor on the load adjusting device can detect the size and the direction of deformation, and then control flexible subassembly to carry out corresponding extension or shorten and offset the power that arouses the deformation of member, reduces the influence of external disturbance to steel pylons.
Drawings
Fig. 1 is a schematic structural diagram of a force bearing adjusting device provided by the invention.
1. A fixing member; 11. a through hole; 2. a sensor; 3. a telescoping assembly; 4. and (5) angle steel.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
First embodiment
The embodiment provides a power transmission tower for supporting a high-voltage power transmission line. The transmission tower is often influenced by strong wind power due to the height of the transmission tower, so that the transmission tower shakes. And the member bar of one side that transmission tower deflected to in rocking can receive extra pressure, and the member bar of opposite side can receive extra pulling force, leads to the damage of member bar easily, causes the incident.
Therefore, the power transmission iron tower further comprises a bearing force adjusting device. As shown in fig. 1, the force-bearing adjusting device comprises two fixed parts 1, a sensor 2 and a telescopic assembly 3. The pole piece of steel pylons is two power poles when designing, just bears the axial force promptly. The two fixing pieces 1 are respectively arranged at two ends of the rod piece in the length direction. The sensor 2 is capable of detecting displacement of the two fixing members 1 along the length of the rod. The flexible subassembly 3 is connected with the communication of sensor 2, and the both ends of flexible subassembly 3 are connected with two mounting 1 respectively, and flexible subassembly 3 can stretch out and draw back according to sensor 2's testing result to exert the adjustment force opposite with the displacement direction to mounting 1. That is, when the sensor 2 detects that the distance between the two fixed members 1 is shortened, the telescopic assembly 3 can be extended, and when the sensor 2 detects that the distance between the two fixed members 1 is extended, the telescopic assembly 3 can be shortened.
Since high voltage transmission requires that the electric wire must be erected high, the transmission tower must be built high. And the very high power transmission iron tower is very unstable, and especially the high wind power is very large, so that the power transmission iron tower shakes. When the power transmission tower shakes, the rod piece deviated to one side of the power transmission tower is stressed by pressure, and the rod piece on the other side of the power transmission tower is stressed by tension. The member can produce deformation when bearing extra pressure or pulling force, and sensor 2 can detect this deformation in real time through the change of distance between two mounting 1, if the member receives pressure to shorten, flexible subassembly 3 just extends, if the member receives the pulling force extension, flexible subassembly 3 just shortens, offsets the deformation that external force made the member produce with shortening through the extension of flexible subassembly 3, and then reduces the interference of external factors to steel pylons. And sensor 2 and flexible subassembly 3 are direct with the member fixed, the degree of difficulty is great, and firm inadequately, and flexible subassembly 3 is extending or shortening in order to offset the power when the deformation that external force arouses the member great, so at member atress direction's both ends design two mounting 1, with member fixed connection, sensor 2 and flexible subassembly 3 all are used on mounting 1.
The dielectric body is deformed in a certain direction by applying force in the certain direction, and charges with opposite positive and negative polarities appear at two ends of the dielectric body in the certain direction, or the dielectric body is deformed by applying an electric field in the certain direction, and the direction is called the polarization direction of the dielectric body. When some dielectrics are deformed by an external force in a polarization direction, polarization occurs in the dielectrics, and opposite charges occur on two opposite surfaces of the dielectrics. When the external force is removed, it returns to its uncharged state, and when the direction of the applied force changes, the polarity of the charge changes, which is called the positive piezoelectric effect. When an electric field is applied in the polarization direction of some dielectrics, these dielectrics also deform, and after the electric field is removed, the deformation of the dielectrics disappears, which is called the inverse piezoelectric effect.
Preferably, the sensor 2 is a piezoelectric sensor, and the polarization direction of the piezoelectric sensor coincides with the length direction of the rod.
The piezoelectric sensor utilizes a positive piezoelectric effect, the piezoelectric sensor deforms along with the deformation of the rod piece after the rod piece is stressed, voltages are generated at two ends of the rod piece, and the deformation direction and degree of the rod piece can be known according to the directions and the sizes of the positive and negative electrodes of the voltages.
Further, the telescopic assembly 3 is a piezoelectric driving member, and the polarization direction of the piezoelectric driving member is consistent with the length direction of the rod member.
The piezoelectric driving part utilizes the inverse piezoelectric effect, the piezoelectric sensor is electrically connected with the piezoelectric driving part, when the piezoelectric sensor is shortened, the piezoelectric driving part is driven to be extended, and when the piezoelectric sensor is extended, the piezoelectric driving part is driven to be shortened. When the two poles of the piezoelectric sensor generate voltage due to deformation, and the voltage is applied to the piezoelectric driving part, the piezoelectric driving part starts to generate deformation to extend or shorten so as to offset the deformation of the rod piece.
In order to make the telescopic assembly 3 capable of providing a large force to counteract the external force, the telescopic assembly 3 includes a plurality of piezoelectric driving members, and the plurality of piezoelectric driving members are uniformly distributed between the two fixing members 1, so as to ensure the balance of the force.
Because the action force of the swing of the power transmission iron tower on the rod piece is very large, and the deformation amount of the rod piece in the length direction is small, the voltage generated at the two ends of the piezoelectric sensor is small, so that the driving force for extending or shortening the piezoelectric driving piece is small, and the deformation caused by the external force borne by the rod piece cannot be well counteracted.
In order to solve the problems, the bearing force adjusting device further comprises a voltage amplifying assembly which amplifies the voltage generated by the piezoelectric sensor to increase the deformation amount of the electric driving element.
In other embodiments, the sensor 2 may also be a displacement meter and the retraction assembly 3 may also be a motor driven lead screw nut.
The displacement meter is fixed on one fixing member 1, and the probe of the displacement meter is abutted against the other fixing member 1, so that the change of the distance between the two fixing members 1, namely the deformation amount of the rod member can be measured. The motor is fixed in the one end of a mounting 1, and the lead screw is connected with the output shaft transmission of motor, and the nut is fixed in on another mounting 1. According to the deformation of the rod piece, the screw rod rotates under the driving of the motor, and the distance between the two fixing pieces 1 changes along with the movement of the nut so as to offset the deformation of the rod piece caused by bearing external force.
In order to make the connection of the fixing member 1 and the rod member more firm, the fixing member 1 includes a plurality of through holes 11, and the fixing member 1 and the rod member are fixedly connected by fastening bolts.
In order to further improve the fastening performance and safety, the strength of the material of the fixing member 1 is higher than that of the material of the rod member, and the side of the fixing member 1, which is in contact with the rod member, needs to be polished and then frosted.
When the telescopic mechanism works, the acting force on the fixing piece 1 is large, and if the static friction force between the fixing piece 1 and the rod piece is too small, the fastening bolt can bear overlarge radial shear force, so that the fastening bolt is easy to break to cause serious accidents. Therefore, one side, in contact with the rod piece, of the fixing piece 1 is polished to ensure the fitting performance of the fixing piece 1 and the rod piece, the friction area is increased, then the fixing piece is subjected to frosting treatment to increase the friction coefficient, the acting force of the telescopic mechanism on the fixing piece 1 is smaller than the maximum static friction force between the fixing piece 1 and the rod piece, relative sliding does not exist between the fixing piece 1 and the rod piece, and the fastening bolt only bears the axial force to ensure safety.
Preferably, the force bearing adjusting device further comprises a protective cover, the protective cover is arranged on the rod, and the sensor 2 and the telescopic assembly 3 are both located in the protective cover.
A protective cover is arranged for the sensor 2 and the telescopic component 3, so that long-time normal work of the sensor 2 and the telescopic component 3 is guaranteed. If the sensor 2 and the telescopic assembly 3 are exposed to the air, the sensor 2 and the telescopic assembly 3 are easily damaged after long-term wind and rain, and the function is lost.
Preferably, the force bearing adjusting device further comprises a data collecting assembly which is electrically connected with the sensor 2 and can collect the change of the distance between the two fixing pieces 1.
The data collection assembly can collect the working state data of the bearing adjusting device, so that workers can conveniently evaluate the state of the rod piece of the power transmission tower according to the data, and the rod piece with potential safety hazards can be maintained or replaced in time, and safety is guaranteed.
Second embodiment
The embodiment provides a power transmission tower, which further comprises a data transmission assembly on the basis of the first embodiment.
Further, this steel pylons still includes data transmission assembly, and data transmission assembly is connected with the data collection subassembly electricity.
The data transmission assembly can transmit the data collected by the data collection assembly to the data analysis end, and the state of the power transmission tower rod piece is monitored in real time.
Preferably, the rod piece of the power transmission tower is an angle iron 4.
The angle iron 4 is a long steel bar with two sides perpendicular to each other to form an angle shape, and has the advantages of low cost, easy forming, high strength and simple and convenient installation. The rod piece of the power transmission iron tower is the angle steel 4, all the angle steels 4 only bear the force in the length direction during design, when the angle steels 4 deform due to stress, the whole load-bearing adjusting device can automatically offset the deformation through the cooperation of the sensor 2 and the telescopic assembly 3, and the automatic repairing function is achieved.
Furthermore, in order to ensure the balance of the angle iron 4 in terms of stress, each side wall of the angle iron 4 needs to be provided with a telescopic assembly 3, so that the whole angle iron 4 is balanced in the stress direction, and no lateral force exists.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (8)
1. A load-bearing adjusting device is used for an electric power tower, the electric power tower comprises a plurality of rod pieces, and the load-bearing adjusting device is characterized by comprising:
two fixing pieces (1) respectively arranged at two ends of the rod piece in the length direction;
the sensor (2) is a piezoelectric sensor, two ends of the piezoelectric sensor are respectively connected with the two fixing pieces (1), the polarization direction of the piezoelectric sensor is consistent with the length direction of the rod piece, and the piezoelectric sensor can detect the displacement of the fixing pieces (1) along the length direction of the rod piece;
flexible subassembly (3), with sensor (2) communication is connected, the both ends of flexible subassembly (3) respectively with two mounting (1) are connected, just flexible subassembly (3) can be based on the testing result of sensor (2) is flexible, in order to right mounting (1) apply with displacement opposite direction's adjustment force, flexible subassembly (3) include the piezoelectricity driving piece, the polarization direction of piezoelectricity driving piece with the length direction of member is unanimous.
2. The force-bearing adjusting device of claim 1, further comprising a voltage amplifying assembly, wherein the voltage amplifying assembly is in communication connection with the piezoelectric sensor and the piezoelectric actuator, and the voltage amplifying assembly can amplify the voltage generated by the piezoelectric sensor to increase the deformation amount of the piezoelectric actuator.
3. Bearing adjustment device according to claim 1 or 2, characterized in that it further comprises a protective cover arranged on the rod, wherein the sensor (2) and the telescopic assembly (3) are both located in the protective cover.
4. Force-bearing adjusting device according to claim 1, wherein the piezoelectric driving member is provided in plurality, and the plurality of piezoelectric driving members are uniformly distributed between the two fixing members (1).
5. Bearing adjustment device according to claim 1, characterized in that it further comprises a data collection assembly, electrically connected to the sensor (2), able to collect the variation of the distance between the two fixtures (1).
6. An electricity pylon comprising a tower body including the rod, wherein the iron pylon further comprises a bearing force adjusting device according to any one of claims 1 to 5.
7. Iron tower according to claim 6, characterised in that said rods are angle irons (4).
8. The pylon according to claim 7, characterized in that one of said bearing adjustment means is provided on each side wall of said angle steel (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011110715.4A CN112282478B (en) | 2020-10-16 | 2020-10-16 | Force bearing adjusting device and power transmission tower |
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| CN202011110715.4A CN112282478B (en) | 2020-10-16 | 2020-10-16 | Force bearing adjusting device and power transmission tower |
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| CN112282478A CN112282478A (en) | 2021-01-29 |
| CN112282478B true CN112282478B (en) | 2022-05-13 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207178106U (en) * | 2017-09-05 | 2018-04-03 | 山东科技大学 | A kind of novel wind power generator blade Flutter Suppression system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0943903B1 (en) * | 1997-09-08 | 2004-11-24 | Ngk Insulators, Ltd. | Mass sensor and mass detection method |
| CN201963017U (en) * | 2011-02-21 | 2011-09-07 | 广东省电力设计研究院 | Combined angle steel and electric transmission line iron tower |
| CN103990662A (en) * | 2014-06-07 | 2014-08-20 | 国家电网公司 | Portable iron tower material straightening device |
| CN104741417A (en) * | 2015-03-27 | 2015-07-01 | 国网辽宁省电力有限公司辽阳供电公司 | Iron tower material corrector |
| JP6734688B2 (en) * | 2016-04-08 | 2020-08-05 | 電源開発株式会社 | Jig for adjusting distance between main pillars of steel tower |
| CN106760876B (en) * | 2016-12-20 | 2019-05-07 | 中国矿业大学 | Minery electric power pylon slidably transform node device and its design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207178106U (en) * | 2017-09-05 | 2018-04-03 | 山东科技大学 | A kind of novel wind power generator blade Flutter Suppression system |
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