CN110906846A - Lining type monitoring and warning module for structural deformation of overhead bridge - Google Patents
Lining type monitoring and warning module for structural deformation of overhead bridge Download PDFInfo
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- CN110906846A CN110906846A CN201911255328.7A CN201911255328A CN110906846A CN 110906846 A CN110906846 A CN 110906846A CN 201911255328 A CN201911255328 A CN 201911255328A CN 110906846 A CN110906846 A CN 110906846A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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Abstract
The invention discloses a monitoring and warning module which comprises a measuring line, an anchoring part, a display assembly and a wire tightening part, wherein the measuring line penetrates through a through hole formed in a bridge, one end of the measuring line, which extends into the bridge, is fixed with a concrete substrate of the bridge through the anchoring part, the wire tightening part is arranged at the other end of the measuring line for tightening and straightening, and the end part of the measuring line, which is close to the wire tightening part, is connected with the display assembly for displaying end part displacement. The measuring line sets up two and more, and the display module includes rack, gear, calibrated scale, and the rack is fixed on the measuring line, and the rack follows the measuring line and follows its tight direction translation that expands, and the gear passes through a pivot and sets up on one side of the rack and with rack toothing, the axis and the gear axis coincidence of calibrated scale, and the scale is located the gear tooth outside on the calibrated scale. The monitoring warning module still includes the constant temperature wheel, and the constant temperature wheel sets up in measuring line one side, and the constant temperature wheel supports tight measuring line surface, and the constant temperature wheel has the function of generating heat.
Description
Technical Field
The invention relates to the field of bridge deformation measurement, in particular to a lining type monitoring and warning module for structural deformation of an overhead bridge.
Background
The bridge deformation mainly comprises static deformation and dynamic deformation, wherein the static deformation comprises deformation with slow change such as foundation subsidence, inclination and stress relaxation, the dynamic deformation comprises deformation with large change rate in short time caused by wind, temperature, traffic load or site construction, and the deformation monitoring of the bridge deformation has important parameter significance for safety evaluation of the bridge.
Traditionally, usually through instruments such as amesdial, accelerometer, theodolite, regularly patrol and examine the bridge deformation that survey on the bridge surface, the detection means technical is higher, and the technical specialty that needs is stronger, and its measurement also has the artificial error of measurement greatly moreover.
Disclosure of Invention
The invention aims to provide a lining type monitoring and warning module for structural deformation of an overhead bridge, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a bushing type monitoring warning module in overhead bridge's structural deformation, is including measuring line, anchor assembly, display module and tight line spare, during the measuring line penetrates the through-hole of seting up in the bridge, the one end that the measuring line gos deep into the bridge is fixed mutually with the concrete matrix of bridge through anchor assembly, the other end of measuring line sets up tight line spare and tightens up the straightness that tightens up, the measuring line is close to the tip position connection display module of tight line spare and is used for showing the tip displacement.
One end of the measuring line arranged in the bridge is fixed on the bridge base body, while the other end is in a semi-free state although being tightened and straightened by the tightening line piece, therefore, when the length of the bridge body of the bridge changes due to various reasons (such as expansion caused by heat and contraction caused by cold, heavy pressure of a heavy truck, unstable foundation of a bridge pier, deflection and the like), the length of the measuring line in the bridge changes correspondingly, the displacement of the semi-free end of the measuring line positioned outside the bridge can be used as a representative quantity of the deflection deformation of the bridge, and the measuring line penetrates into the bridge instead of being exposed outside, therefore, the length measuring device can be perfectly protected, the length change of the measuring line cannot be influenced by external length interference factors, the length change of the measuring line is only related to bridge deformation and self linear expansion and contraction, and the length interference caused by expansion with heat and contraction with cold of the measuring line can be greatly reduced by selecting a material with a low linear expansion coefficient to manufacture the measuring line.
Furthermore, two or more measuring lines are arranged, the two ends of each measuring line are provided with anchoring parts, display components and tightening parts, the number of the anchoring parts, the display components and the tightening parts is corresponding to the number of the measuring lines, and the lengths of the plurality of measuring lines in the bridge form an arithmetic progression in an original state.
The bridge is generally long, only one measuring line is used for measuring the total length change of the bridge from head to tail, the deformation of the whole bridge body of the bridge can be reflected, the local deformation of the bridge cannot be found, a plurality of measuring lines are arranged, the fixed ends of the measuring lines are fixed at different positions, the variable quantity of the bridge body with different lengths is measured by each measuring line, the deformation quantity of each length section of the bridge is obtained through addition and subtraction conversion, the deformation of the bridge at certain local positions is effectively and quickly identified, if the deformation rate of the bridge and the deformation rate of the rest bridge sections in a large length range, which is caused by temperature change, are greatly different, the external part is prompted to check the corresponding positions, and the further occurrence of deformation is prevented to cause danger and even collapse. It should be noted that, when setting up many measuring lines, should avoid making it to interfere or contact each other, avoid producing the displacement interference, when setting up, can be the branch be listed as in the bridge hole shape passageway of difference, also can set up with the same passageway of great aperture, but separate mutually with parts such as similar pulley, moreover, take place the kink at the measuring line, use the guide pulley to lead, prevent to collide with concrete matrix around.
Furthermore, the display assembly comprises a rack, a gear and a dial, the rack is fixed on the measuring line and translates along the expansion direction of the measuring line, the gear is arranged beside the rack through a rotating shaft and is meshed with the rack, the axis of the dial is overlapped with the axis of the gear, and the scale on the dial is positioned on the outer side of the gear teeth.
The method is characterized in that the semi-free end of the measuring line is required to be connected with a wire fastening piece, so that the corresponding structure is inconvenient to arrange when the end displacement of the semi-free end of the measuring line is directly measured to be used as the bridge deformation amount, the bridge deformation amount is not large, the end displacement of the semi-free end of the measuring line is not large, the identification precision is influenced, the end displacement of the measuring line is converted into the rotation amount of a gear by using a gear rack, a corresponding identification object can be arranged at a certain position outside the outer surface of the gear, and the dial is instantly used, so that the bridge deformation amount is converted into the rotation amount of the gear, the change of the corresponding position of a certain tooth of the gear on the dial represents the bridge deformation amount, and the numerical value on the dial can be converted in advance, so that a bridge manager can directly read the bridge deformation amount from the dial to.
Furthermore, the display assembly further comprises a pointer, the pointer is fixed on the gear and axially staggered with the tooth part, the pointer points along the radial direction of the gear, the length of the pointer is larger than the diameter of the addendum circle of the gear, and the scale of the dial is carved on the path of the end part of the pointer.
The outer diameter of the pointer is larger than the diameter of the addendum circle of the gear, the specific value is the displacement amplification coefficient of the semi-free end of the measuring line, after amplification is carried out, the reading sensitivity is higher, and the measurement is more accurate. The pointer has a limited amplification factor, and if the pointer is a short bridge and the measurement precision requirement for the deformation of the pointer is very high, a display component with a larger amplification factor can be arranged, for example, a gear set is used for carrying out multi-stage amplification, and finally, the display component is displayed on a scale for external reading. When the multi-stage gear or the pointer is arranged, the pointer is required to avoid the measuring line, the pointer and the measuring line are staggered for a certain distance along the axial direction of the gear, and the rotating axis is required to be kept consistent.
Furthermore, the measuring line is a metal wire, the measuring line is connected with the line tightening piece through a patch cord, and the patch cord is a flexible braided line. The measuring line is arranged in the bridge, and if the measuring line breaks, the measuring line is troublesome to replace, so in order to enable the measuring line to have certain strength, a metal wire is preferably used as the measuring line, and therefore, the possibility of breakage of the measuring line is greatly reduced in the using process. Because the measuring wire is made of metal, if the end of the measuring wire is tightened by using a wheel type winding type tightening wire piece, the end of the measuring wire can deform, and the connection between the measuring wire and the tightening wire piece is easily damaged in the past, so that a section of patch cord is added between the measuring wire and the tightening wire piece, the patch cord is flexible, can undergo deformation for many times without fatigue damage, protects the end position of the measuring wire, and only needs to be translated.
Preferably, the wire tightening element is a spiral spring. The volute spiral spring tightens the connecting wire and then tightens the measuring wire, the elastic force of the volute spiral spring does not change along with the deformation, constant tightening force can be provided for the measuring wire, and the length change of the measuring wire caused by the tightening force is eliminated.
As optimizing, the monitoring warning module still includes the constant temperature wheel, and the constant temperature wheel sets up in measuring line one side, and the constant temperature wheel supports tight measuring line surface, and the constant temperature wheel has the function of generating heat, and the constant temperature wheel is connected through the cable that has the surplus length with the outside.
As previously mentioned, there are two main factors that influence the change in length of the gauge wire from the anchor to the display assembly: deformation that bridge deformation and temperature variation arouse, wherein the deformation that temperature variation arouses should eliminate as far as, though chooseed the material preparation measuring line of low linear expansion coefficient for use, still can produce the influence because of temperature variation, and add behind the constant temperature wheel, the temperature variation influence of elimination that can the very big degree, the principle is: because the measuring line is a metal wire, the inside of the measuring line has a larger heat conductivity coefficient, a constant temperature wheel is used for abutting against the surface of the measuring line, the constant temperature wheel slightly heats the measuring line, the heating temperature of the constant temperature wheel can be selected as the average value of the highest historical temperature of the place where the bridge is located in the month, the measuring line has an almost stable temperature, the deformation quantity of the bridge caused by temperature difference is eliminated, and when the temperature of the constant temperature wheel is modified, the display assembly is adjusted to zero. The constant temperature wheel sets up in the measuring wire place passageway of bridge, and the heat-generating body in the constant temperature wheel passes through signal line and power supply line and external connection, and the signal line should not be straight with the power supply line, prevents that bridge deformation from causing the fracture.
As optimization, the exposed part of the measuring line positioned in the bridge is wrapped by the heat-insulating layer. The heat preservation keeps warm to the measuring wire, prevents that the heat loss is too much to lead to along the measuring wire length direction uneven temperature distribution arouse the measuring wire length change.
Furthermore, the anchoring piece comprises a central ball and a plurality of fixing spines extending out of the surface, the fixing spines are embedded in the concrete matrix of the bridge in a pouring mode, and the measuring lines are fixed with the central ball. The anchoring piece is used as an embedded piece and is implanted into the bridge when the bridge base body is produced, and then the measuring line is led to be welded with the central ball.
As optimization, the hub of the gear is provided with an angle sensor, and the angle sensor provides an angle variation signal to the outside. The angle change of the gear is related to the deformation of the bridge, and the gear is conveniently managed outside through electric signal transmission after the angle sensor is added.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the measuring line is arranged in the bridge, one end of the measuring line is fixed in the bridge base body, and the other end of the measuring line extends out and is tightened, so that the deformation of the bridge can be converted into the displacement of the tightened end of the measuring line for identification, the displacement of the tightened end of the measuring line is amplified and then displayed and remotely transmitted, a bridge manager can conveniently identify and detect the deformation, a large deformation position is timely found after a certain degree is exceeded, the site processing and maintenance are carried out, and the further occurrence of deformation is prevented to cause danger; through the constant temperature piece and the heat preservation layer arranged on the measuring line, the length change of the measuring line caused by the temperature change in the use occasion is greatly eliminated, and the numerical value displayed on the display component completely reflects the bridge deformation.
Drawings
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
FIG. 1 is a schematic view of the present invention in a bridge;
FIG. 2 is a schematic diagram of a variation of the present invention in a bridge;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic diagram of the connection of the display module, the patch cord, the strain gauge and the measurement cable according to the present invention;
FIG. 5 is a schematic structural view of a constant temperature wheel and a heat insulation layer arranged on the surface of the measuring line of the present invention;
fig. 6 is a schematic structural view of the thermostatic cartridge of the present invention.
In the figure: 1-measuring line, 2-anchoring piece, 21-center ball, 22-fixed thorn, 3-display component, 31-rack, 32-gear, 33-pointer, 34-dial, 4-patch cord, 5-wire tightening piece, 6-constant temperature wheel, 7-heat insulation layer, 8-constant temperature cylinder, 81-cylinder, 82-signal line and 9-guide wheel.
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.
As shown in fig. 1 and 4, a lining type monitoring and warning module for structural deformation of an overhead bridge comprises a measuring line 1, an anchoring part 2, a display component 3 and a wire tightening part 4, wherein the measuring line 1 penetrates through a through hole formed in the bridge, one end, penetrating into the bridge, of the measuring line 1 is fixed with a concrete matrix of the bridge through the anchoring part 2, the other end of the measuring line 1 is provided with the wire tightening part 4 for tightening and straightening, and the end part position, close to the wire tightening part 4, of the measuring line 1 is connected with the display component 3 and used for displaying end part displacement.
One end of the measuring line 1 arranged in the bridge is fixed on the bridge base body, while the other end is in a semi-free state despite being tightened and straightened by the tightening line piece 4, therefore, when the length of the bridge body of the bridge changes due to various reasons (such as expansion and contraction with heat, compression with heavy trucks, unstable foundation of the bridge pier, deflection and the like), and the length of the measuring line 1 in the bridge changes correspondingly as shown in fig. 2, the displacement of the semi-free end of the measuring line 1 outside the bridge can be used as a representative quantity of the deflection deformation of the bridge, and because the measuring line 1 penetrates into the bridge and is not exposed outside, therefore, the length measuring device can be perfectly protected, the length change of the measuring line 1 cannot be influenced by external length interference factors, the length change of the measuring line 1 is only related to bridge deformation and self linear expansion and contraction, and the length interference caused by expansion with heat and contraction with cold of the measuring line 1 can be greatly reduced by selecting a material with a low linear expansion coefficient to manufacture the measuring line 1.
As shown in fig. 1 and 3, two or more measuring lines 1 are provided, the number of the anchoring parts 2, the display components 3 and the tightening parts 4 corresponding to the number of the measuring lines 1 are provided at two ends of the measuring lines 1, and the lengths of the measuring lines 1 in the bridge form an arithmetic progression in an original state.
The bridge is generally longer, only one measuring line 1 is used for measuring the total length change of the bridge from beginning to end, the deformation of the whole bridge body of the bridge can be reflected, the local deformation of the bridge cannot be found, after a plurality of measuring lines 1 are arranged, the fixed ends of the measuring lines are fixed at different positions, the variable quantity of the bridge body with different lengths is measured by each measuring line 1, the deformation quantity of each length section of the bridge is obtained through addition and subtraction conversion, the deformation of the bridge at certain local positions is effectively and quickly identified, if the deformation rate of the bridge body is greatly different from the deformation rate of the rest bridge sections in a large length range due to temperature change, the outside is prompted to check the corresponding positions, and the further occurrence of deformation is prevented to cause danger and even collapse. It should be noted that, when a plurality of measuring lines 1 are arranged, the measuring lines should be prevented from interfering or contacting with each other and generating displacement interference, and when the measuring lines are arranged, the measuring lines can be arranged in different bridge hole-shaped channels or in the same channel with a larger hole diameter, but the measuring lines are separated from each other by using parts like pulleys, and moreover, at the bending position of the measuring lines 1, the guide wheels 9 are used for guiding and preventing the measuring lines from colliding with the surrounding concrete matrix.
As shown in fig. 4, the display assembly 3 comprises a rack 31, a gear 32 and a dial 34, wherein the rack 31 is fixed on the measuring line 1, the rack 31 follows the measuring line 1 to translate along the expansion direction, the gear 32 is arranged beside the rack 31 through a rotating shaft and is meshed with the rack 31, the axis of the dial 34 is coincident with the axis of the gear 32, and the scale on the dial 34 is positioned outside the teeth of the gear 32.
Since the half free end of the measuring line 1 needs to be connected with the wire tightening member 5, it is inconvenient to arrange a corresponding structure if directly measuring the end displacement of the half free end of the measuring line 1 as the deformation amount of the bridge, and since the deformation amount of the bridge is not large, so that the end displacement of the semi-free end of the measuring line 1 is not so large, and the recognition accuracy is affected, and the end displacement of the measuring line 1 is converted into the rotation amount of the gear 32 by using the rack and pinion, and a corresponding recognized object can be arranged at a position outside the outer surface of the gear 32, i.e. the dial 34, so that the bridge deformation is converted into the rotation of the gear 32, the change of the corresponding position of one tooth of the gear 32 on the dial 34 represents the bridge deformation, the numerical value on the dial 34 can be converted in advance, thus, the bridge manager can directly read the bridge deformation amount from the dial 34 for further management.
As shown in fig. 4, the display assembly 3 further comprises a pointer 33, the pointer 33 is fixed on the gear 32 and axially staggered with the tooth part, the pointer 33 points along the radial direction of the gear 32, the length of the pointer 33 is larger than the diameter of the addendum circle of the gear 32, and the scale of the dial 34 is marked on the path of the end of the pointer 33.
The outer diameter of the pointer 33 is larger than the diameter of the addendum circle of the gear 32, the specific value is the displacement amplification coefficient of the semi-free end of the measuring line 1, after amplification is carried out, the reading sensitivity is higher, and the measurement is more accurate. The pointer 33 has a limited magnification factor, and if the pointer is a short bridge and the measurement accuracy requirement for the deformation amount is very high, a display component with a larger magnification factor can be arranged, for example, a gear set is used for carrying out multi-stage magnification, and finally, the display component is displayed on a scale for external reading. When the multi-stage gear or pointer 33 is provided, attention is paid to avoiding the measuring line 1, which is overlapped in fig. 4, and actually, the pointer 33 is displaced from the measuring line 1 by a certain distance in the direction perpendicular to the plane of fig. 4, and it is only necessary to keep the rotation axes coincident.
The measuring line 1 is a metal wire, the measuring line 1 and the wire tightening piece 5 are connected through the patch cord 4, and the patch cord 4 is a flexible braided wire. The measuring line 1 is arranged in the bridge and is troublesome to replace if broken, so in order to ensure that the measuring line 1 has certain strength, a metal wire is preferably used as the measuring line 1, and the possibility of breakage of the measuring line 1 in the using process is greatly reduced. Because the measuring line is made of metal, if the end part of the measuring line 1 is tightened by using the wheel type winding type tightening line piece 5, the end part of the measuring line 1 can be deformed, and the connection between the measuring line 1 and the tightening line piece 5 is easily damaged in the past, so that a section of the patch cord 4 is added between the measuring line 1 and the tightening line piece 5, the patch cord 4 is flexible and can undergo deformation for many times without fatigue damage, the end position of the measuring line 1 is protected, and the measuring line 1 only needs to be translated.
The wire tightening element 4 is a spiral spring. The volute spiral spring tightens the rotating connection wire 4, then tightens the measuring wire 1, the elastic force of the volute spiral spring does not change along with the deformation, constant tightening force can be provided for the measuring wire 1, and the length change of the measuring wire 1 caused by the tightening force is eliminated.
As shown in fig. 6, the monitoring and warning module further comprises a constant temperature wheel 6, the constant temperature wheel 6 is arranged beside the measuring line 1, the constant temperature wheel 6 abuts against the surface of the measuring line 1, the constant temperature wheel 6 has a heating function, and the constant temperature wheel 6 is connected with the outside through a cable with surplus length.
As mentioned previously, there are two main factors that influence the change in length of the measuring wire 1 from the anchor 2 to the display assembly 3: deformation that bridge deformation and temperature variation arouse, wherein the deformation that temperature variation arouses should eliminate as far as, though chooseed the material preparation measuring line 1 of low linear expansion coefficient for use, still can produce the influence because of temperature variation, and add behind the constant temperature wheel 6, the temperature variation influence of elimination that can the very big degree, the principle is: because the measuring line 1 is a metal wire, the inside of the measuring line has a larger heat conductivity coefficient, the constant temperature wheel 6 is used for abutting against the surface of the measuring line 1, the constant temperature wheel 6 slightly heats the measuring line 1, the heating temperature of the constant temperature wheel 6 can be selected as the average value of the highest historical temperature of the place where the bridge is located in the month, the measuring line 1 has an almost stable temperature, the deformation quantity of the bridge caused by the temperature difference is eliminated, and the display component 3 should be zeroed when the temperature of the constant temperature wheel 6 is modified. The constant temperature wheel 6 is arranged in a channel where a measuring line 1 of the bridge is located, a heating body in the constant temperature wheel 6 is connected with the power supply line and the outside through a signal line, the signal line and the power supply line are not stretched straight, and the bridge is prevented from being deformed to cause fracture.
The constant temperature part can also use a constant temperature barrel 8 as shown in fig. 6, the constant temperature barrel 8 is provided with a barrel body 81 and a signal wire 82, a plurality of rolling balls are arranged in the barrel body 81, the barrel body 81 generates heat, the measuring wire 1 is conveyed to the measuring wire through the rolling balls, and the rolling balls are annularly wrapped on the measuring wire 1 and further play a role in guiding and serve as linear bearings.
As shown in fig. 5, the exposed part of the measuring line 1 in the bridge is wrapped by the insulating layer 7. The heat preservation layer 7 is used for preserving heat of the measuring line 1, and the measuring line length change caused by uneven temperature distribution along the length direction of the measuring line 1 due to excessive heat dissipation is prevented.
As shown in fig. 3, the anchoring member 2 includes a central ball 21 and a plurality of fixing thorns 22 extending from the surface, the fixing thorns 22 are embedded and cast in the concrete matrix of the bridge, and the measuring line 1 is fixed with the central ball 21. The anchoring piece 2 is used as an embedded part and is implanted into the bridge when the bridge matrix is produced, and then the measuring line 1 is only required to be led over and welded with the central ball 21.
The hub of the gear 32 is provided with an angle sensor which provides an angle variation signal to the outside. The angle change of the gear 32 is related to the bridge deformation, and the angle sensor is added to facilitate the management of transmitting an electric signal to the outside.
The use principle of the device is as follows: one end of a measuring line 1 penetrating into the bridge is fixed with the bridge base body, the other end of the measuring line extends out and is tightened, when the bridge deforms due to some factors, the length of the measuring line 1 from the anchoring part end to the display component 3 changes, the displacement of the end part of the tightening end of the measuring line 1 is converted into the display component 3 to display the deformation and transmit the deformation outwards, and the outside is further managed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a bushing type monitoring warning module in overhead bridge's structural deformation volume which characterized in that: the monitoring warning module comprises a measuring line (1), an anchoring part (2), a display assembly (3) and a wire tightening part (4), wherein the measuring line (1) penetrates through a through hole formed in the bridge, one end, penetrating into the bridge, of the measuring line (1) is fixed with a concrete substrate of the bridge through the anchoring part (2), the other end of the measuring line (1) is provided with the wire tightening part (4) for tightening and straightening, and the end part position, close to the wire tightening part (4), of the measuring line (1) is connected with the display assembly (3) and used for displaying end part displacement.
2. The module of claim 1, wherein the module comprises: the measuring line (1) is provided with two or more than two, the two ends of the measuring line (1) are provided with anchoring parts (2), display components (3) and tightening parts (4) corresponding to the number of the measuring lines, and the lengths of the measuring lines (1) in the bridge form an arithmetic progression in an original state.
3. The module of claim 1, wherein the module comprises: display module (3) are including rack (31), gear (32), calibrated scale (34), rack (31) are fixed on measuring line (1), and measuring line (1) is followed in rack (31) and is followed to expand tight direction translation, gear (32) set up on one side rack (31) and mesh with rack (31) through a pivot, the axis and the gear (32) axis coincidence of calibrated scale (34), the scale is located gear (32) tooth outside on calibrated scale (34).
4. The module of claim 3, wherein the module comprises: the display assembly (3) further comprises a pointer (33), the pointer (33) is fixed on the gear (32) and axially staggered with the tooth part, the pointer (33) points along the radial direction of the gear (32), the length of the pointer (33) is larger than the diameter of the addendum circle of the gear (32), and scales of the dial (34) are carved on the path of the end part of the pointer (33).
5. The module of claim 1, wherein the module comprises: the measuring line (1) is a metal wire, the measuring line (1) and the wire fastening piece (4) are connected through the adapter wire (4), and the adapter wire (4) is a flexible braided wire.
6. The module of claim 5, wherein the module comprises: the wire tightening piece (4) is a volute spiral spring.
7. The module of claim 5, wherein the module comprises: monitoring warning module still includes constant temperature wheel (6), constant temperature wheel (6) set up in measuring line (1) one side, and constant temperature wheel (6) support tight measuring line (1) surface, and constant temperature wheel (6) have the function of generating heat, and constant temperature wheel (6) are connected through the cable that has length surplus with the outside.
8. The module of claim 7, wherein the module comprises: the exposed part of the measuring line (1) in the bridge is wrapped with an insulating layer (7).
9. The module of claim 1, wherein the module comprises: the anchoring piece (2) comprises a central ball (21) and a plurality of fixing thorns (22) extending out of the surface, the fixing thorns (22) are pre-cast in a concrete matrix of the bridge, and the measuring line (1) is fixed with the central ball (21).
10. The module of claim 4, wherein the module comprises: the hub of the gear (32) is provided with an angle sensor, and the angle sensor provides an angle variation signal to the outside.
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| CN201911255328.7A CN110906846A (en) | 2019-12-10 | 2019-12-10 | Lining type monitoring and warning module for structural deformation of overhead bridge |
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| CN201911255328.7A CN110906846A (en) | 2019-12-10 | 2019-12-10 | Lining type monitoring and warning module for structural deformation of overhead bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378312A (en) * | 2020-10-16 | 2021-02-19 | 东风柳州汽车有限公司 | Device for measuring opening of gear bracket |
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