CN203881467U - Force monitoring device for in-use bridge bearing - Google Patents
Force monitoring device for in-use bridge bearing Download PDFInfo
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- CN203881467U CN203881467U CN201420306714.0U CN201420306714U CN203881467U CN 203881467 U CN203881467 U CN 203881467U CN 201420306714 U CN201420306714 U CN 201420306714U CN 203881467 U CN203881467 U CN 203881467U
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- spring
- strain
- housing
- spring leaf
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a force monitoring device for an in-use bridge bearing. The force monitoring device includes two sub-devices which are connected to each other. A metal fixing layer is arranged on an inner wall of a shell body of each sub-device. One ends of a plurality of spring pieces are uniformly and symmetrically fixed on the same horizontal plane and the other ends of the spring pieces are gathered at a central position in the shell body and are connected together. A force-transmission rod, with an end part being provided with a contact block, passes through a through hole, which is formed in the center of an upper end cover, and is connected to the central position on which the spring pieces gather so that a force, which is caused by change of the bridge bearing and is monitored by the contact block, can be transmitted to the spring pieces. A pair of strain pieces is respectively attached to a front surface and a back surface of each spring piece, wherein the position of the strain piece attached to the front surface of each spring piece is corresponding to the position of the strain piece attached to the back surface of each spring piece. The strain pieces are connected to a wire which is let out from a wire hole formed in the bottom of the shell body. The strain pieces transmit a strain force amplified by the spring piece to an external strain meter. By means of the force monitoring device, an actual force on the bridge bearing can be monitored so that a problem of nonuniform forces on the bridge bearing can be found out by operators and a maintaining operation can be carried out.
Description
Technical field
The utility model belongs to bridge monitoring field, relates to bridge pad, is specifically related to one and is using bridge pad load-bearing monitor device.
Background technology
Bearing is as the basic building block of bridge structure, and Main Function is the whole load on bridge span structure to be delivered to Bridge Pier get on.During bridge detects, Bearing Seat Force inequality is recurrent, more general in assembled slab bridge, curved bridge and skew bridge.Bearing Seat Force inequality causes beam body plane by four fulcrums or three fulcrum supports, even two fulcrum supports, and partial pressing increases, and causes that bridge superstructure is stressed to go wrong, and when serious, even occurs that beam body topples.But the uneven situation naked eyes of a lot of Bearing Seat Forces are difficult to identification, and need testing staff's work high above the ground, therefore artificial detection is difficult to the true stressed situation of bearing to make judgement accurately.
Summary of the invention
The deficiency existing for prior art, the purpose of this utility model is, provides a kind of and is using bridge pad load-bearing monitor device, to true stressed monitoring of bridge pad, so that staff finds in time the problem of Bearing Seat Force inequality and keeps in repair.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of with bridge pad load-bearing monitor device, it is characterized in that: comprise two sub-devices, between two sub-devices by auxiliary connecting rod be connected make two sub-devices in the time monitoring in same level position;
Described sub-device comprises the housing with lower bottom base, on housing, be provided with upper end cover, in inner walls, be provided with layer of metal fixed bed, the one end that is fixed with symmetrically multiple spring leafs in the same level of metal fixed bed, the other end of spring leaf converges to the center in housing and links together;
End is connected through the through hole at upper end cover center and the convergence center of spring leaf with the transmission rod of contact block, the bridge pad that contact block is monitored changes the power causing and passes to spring leaf, foil gauge is posted in the position that on each spring leaf, tow sides are identical, foil gauge is connected with wire, wire is drawn through the wire guide of housing bottom, and the strain transfer that foil gauge amplifies spring leaf by wire is given outside strainmeter.
The utility model also has following technical characterictic:
Described housing is cylindrical shell.
Described spring leaf is three limb spring leafs, and three limb spring leafs are that three angles differ the spring leaf composition of 120 °.
On described housing, be processed with threaded hole, the two ends of auxiliary connecting rod are arranged on respectively in the threaded hole of a sub-device.
Described transmission rod is the transmission rod of adjustable in length.
The utility model compared with prior art, has following technique effect:
The utility model can be to true stressed monitoring of bridge pad, so that staff finds in time the problem of Bearing Seat Force inequality and keeps in repair.Experience at the bottom of bearing place beam and the relative displacement at bent cap top by three limb spring leafs and foil gauge above, and then judge the stressing conditions of bearing, there is highly sensitive, good stability, be easy to demarcation, easy to use, be convenient to the advantages such as observation.
Brief description of the drawings
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Fig. 2 is the sectional structure schematic diagram of sub-device of the present utility model.
Fig. 3 is the structural representation of three limb spring leafs.
Installation site schematic diagram when Fig. 4 is monitoring device work of the present utility model.
In figure, the implication of each label is: 1-device, 2-auxiliary connecting rod, 3-housing, 4-lower bottom base, 5-upper end cover, 6-metal fixed bed, 7-spring leaf, 8-contact block, 9-transmission rod, 10-through hole, 11-foil gauge, 12-wire, 13-wire guide, 14-strainmeter, 15-threaded hole, 16-beam body, 17-bearing, 18-bent cap, 19-bridge pier.
Below in conjunction with accompanying drawing, particular content of the present utility model is further explained in detail to explanation.
Embodiment
Below provide specific embodiment of the utility model, it should be noted that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.
Embodiment:
Defer to technique scheme, as shown in Figure 1 to Figure 3, the present embodiment provides a kind of with bridge pad load-bearing monitor device, it is characterized in that: comprise between 1, two sub-device 1 of two sub-devices by auxiliary connecting rod 2 be connected make two sub-devices 1 when the monitoring in same level position;
Described sub-device 1 comprises the housing 3 with lower bottom base 4, on housing 3, be provided with upper end cover 5, on housing 3 inwalls, be provided with layer of metal fixed bed 6, the one end that is fixed with symmetrically multiple spring leafs 7 in the same level of metal fixed bed 6, the other end of spring leaf 7 converges to the center in housing 3 and links together;
End is connected with the convergence center of spring leaf 7 through the through hole 10 at upper end cover 5 centers with the transmission rod 9 of contact block 8, the bridge pad that contact block 8 is monitored changes the power causing and passes to spring leaf 7, on each spring leaf 7, foil gauge 11 is posted in the identical position of tow sides, foil gauge 11 is connected with wire 12, wire 12 is drawn through the wire guide 13 of housing 3 bottoms, and the strain transfer that foil gauge 11 amplifies spring leaf 7 by wire 12 is given outside strainmeter 14.
Housing 3 is cylindrical shell, and cylindrical shell can make spring leaf 7 fixing on cylindric metal fixed bed 6 symmetrical installation better, and after convergence center is stressed, the distortion of each spring leaf 7 keeps evenly.
Multiple spring leafs 7 are three limb spring leafs, and three limb spring leafs are that three angles differ the spring leaf 7 of 120 ° and form.
On housing 3, be processed with threaded hole 15, the two ends of auxiliary connecting rod 2 are arranged on respectively in the threaded hole 15 of a sub-device 1.
The transmission rod that transmission rod 9 is adjustable in length, to be suitable for different bridge pad 17.
In the present embodiment, bearing 17 is the circular tetrafluoro slide plate of highway bridge natural rubber bearing, diameter 300mm.Thickness 54mm, the length of auxiliary connecting rod 2 is selected 250mm, and the thickness of three limb spring leafs is 1mm.
The course of work of the present utility model is as described below:
The material of selecting according to spring leaf and the difference of size, the corresponding relation of the relative displacement of the reading strain that strainmeter 14 is exported and beam body 16 bottom surfaces and bent cap 18 end faces is different, therefore need to carry out verification, to the displacement of the step-lengths such as device input is a series of, strainmeter 14 is exported corresponding reading strain, then return out the regression equation between beam body 16 bottom surfaces and the relative displacement y of bent cap 18 end faces generations and the strain x of the flexural deformation generation of spring leaf, the reading substitution regression equation of strainmeter 14 just can be determined to the relative displacement of beam body 16 bottom surfaces and bent cap 18 end faces.
After bridge construction completes, as shown in Figure 4, bearing 17 is arranged between beam body 16 and bent cap 18, bent cap 18 is bridge pier 19 below, two of monitoring device of the present utility model sub-devices 1 are placed on to the both sides of bearing 17, two sub-devices 1 couple together by auxiliary connecting rod, select the transmission rod 9 mating with bearing 17 or the length that regulates transmission rod 9 to make it adapt to bearing 17, the contact block 8 of transmission rod 9 ends contacts with the bottom surface of beam body 16, the lower bottom base 4 of sub-device 1 is placed on the end face of bent cap 18, testing staff only needs wire 12 to access strainmeter 14, read reading, substitution regression equation, obtain the relative displacement of beam body 16 bottom surfaces and bent cap 18 end faces, if one of the relative displacement recording in two sub-devices is larger, one less, difference is greater than setting, judge bearing 17 unbalance stress.Now, testing staff should take measures in time, and it is carried out to maintenance, maintenance.
When bearing 17 unbalance stress, show beam body 16 bottom surfaces and bent cap 18 end face generation relative displacements, cause the vertical displacement with contact block 8 transmission rods 9, and then the flexural deformation of drive spring leaf 7, foil gauge 11 records the strain of the flexural deformation generation of spring leaf, the transformational relation of the relative displacement of the reading strain of exporting by verification strainmeter 14 and beam body 16 bottom surfaces and bent cap 18 end faces, by the reading strain substitution regression equation of strainmeter 14, thus the relative displacement that acquisition beam body 16 bottom surfaces and bent cap 18 end faces occur.
In the present embodiment, the bearing of certain bridge is the circular tetrafluoro slide plate of highway bridge natural rubber bearing, diameter 300mm.Thickness 54mm, the length of auxiliary connecting rod 2 is selected 250mm, and the thickness of three limb spring leafs is 1mm, and the length of every limb is 11mm.Obtaining regression curve by verification is that (unit of x is μ ε to y=0.1176x; The unit of y is mm).Device is installed and is finished and work after a period of time, and the reading strain that records sub-device 1 is 30 μ ε, and it is 3.528mm that substitution regression curve is tried to achieve relative displacement; The reading strain of sub-device 2 is 62 μ ε, and it is 7.291mm that substitution regression curve is tried to achieve relative displacement, and the difference of the relative displacement that two sub-devices record is 3.763mm, and difference is greater than 2mm, and Bearing Seat Force inequality is described.
Claims (5)
1. using bridge pad load-bearing monitor device for one kind, comprise two sub-devices (1), it is characterized in that: between two sub-devices (1) by auxiliary connecting rod (2) be connected make two sub-devices (1) in when monitoring in same level position;
Described sub-device (1) comprises the housing (3) with lower bottom base (4), on housing (3), be provided with upper end cover (5), on housing (3) inwall, be provided with layer of metal fixed bed (6), in the same level of metal fixed bed (6), be fixed with symmetrically one end of multiple spring leafs (7), the other end of spring leaf (7) converges to the center in housing (3) and links together;
End is connected with the convergence center of spring leaf (7) through the through hole (10) at upper end cover (5) center with the transmission rod (9) of contact block (8), the bridge pad that contact block (8) is monitored changes the power causing and passes to spring leaf (7), foil gauge (11) is posted in the identical position of the upper tow sides of each spring leaf (7), foil gauge (11) is connected with wire (12), wire (12) is drawn through the wire guide (13) of housing (3) bottom, the strain transfer that foil gauge (11) amplifies spring leaf (7) by wire (12) is given outside strainmeter (14).
2. as claimed in claim 1 with bridge pad load-bearing monitor device, it is characterized in that: described housing (3) is cylindrical shell.
3. as claimed in claim 1ly it is characterized in that: described multiple spring leafs (7) are three limb spring leafs with bridge pad load-bearing monitor device, three limb spring leafs are that three angles differ spring leaf (7) composition of 120 °.
4. as claimed in claim 1 at use bridge pad load-bearing monitor device, it is characterized in that: on described housing (3), be processed with threaded hole (15), the two ends of auxiliary connecting rod (2) are arranged on respectively in the threaded hole (15) of a sub-device (1).
5. as claimed in claim 1 with bridge pad load-bearing monitor device, it is characterized in that: described transmission rod (9) is the transmission rod of adjustable in length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306714.0U CN203881467U (en) | 2014-06-10 | 2014-06-10 | Force monitoring device for in-use bridge bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306714.0U CN203881467U (en) | 2014-06-10 | 2014-06-10 | Force monitoring device for in-use bridge bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881467U true CN203881467U (en) | 2014-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306714.0U Expired - Fee Related CN203881467U (en) | 2014-06-10 | 2014-06-10 | Force monitoring device for in-use bridge bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203881467U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411688A (en) * | 2019-07-31 | 2019-11-05 | 广州市城市规划勘测设计研究院 | A kind of abutment safety monitoring device |
-
2014
- 2014-06-10 CN CN201420306714.0U patent/CN203881467U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411688A (en) * | 2019-07-31 | 2019-11-05 | 广州市城市规划勘测设计研究院 | A kind of abutment safety monitoring device |
| CN110411688B (en) * | 2019-07-31 | 2020-11-24 | 广州市城市规划勘测设计研究院 | Support safety monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20160610 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |