CN208751790U - For judging the device of bridge rotation critical balance - Google Patents

Abstract

The utility model discloses a kind of for judging the device of bridge rotation critical balance, device includes: that described device includes beam body, rotation flexural pivot and control device, the beam-ends of beam body has the first jack and the second jack of the beam-ends for loading beam body, and beam body is equipped with symmetrical the first pinboard and the second pinboard close to one end of rotation flexural pivot；First pinboard and the second pinboard are connected with the first displacement sensor and second displacement sensor for measuring displacement respectively；Control device is connected with the first jack and the second jack, for controlling the loading force being applied in beam body；Control device is connected with the first displacement sensor and second displacement sensor, for obtaining the displacement of the first pinboard and the second pinboard.The purpose of the utility model is to provide a kind of device, which searches out beam body in beam body loading procedure and rotates the rotation borderline balance state of flexural pivot, promotes rotator construction quality and reduces construction safety risk.

Description

For judging the device of bridge rotation critical balance

Technical field

The utility model relates to field of bridge construction, and in particular to a kind of for judging the dress of bridge rotation critical balance It sets.

Background technique

With the rapid development of traffic network and urban construction, various overcrossing railways, highway, river and urban road bridge Beam is more and more, the operation according to the work progress of conventional this cross-line bridge of method for bridge construction to existing railway, highway It affects greatly, causes traffic long-term unsmooth or even paralysis.It is domestic in recent years, it turns bridge construction gross tonnage and across footpath obtains The development and raising of breakthrough formula, swivel bridges construction Control Research technology is also more and more mature and reliable, but most swivel bridges The characteristics of be that tonnage is big, across footpath is big, straight line, it is less to the control research of large span curve broad box girder rotator construction.

Bridge is first parallel to existing traffic route using rotator construction to set up, then by setting in bridge pier bottom in advance The rotating ball hinge system set to existing traffic route surface, can greatly reduce in this way to existing traffic the flat turn of bridge entirety The interference of railroad embankment.For some cross a river roads bridge, this rotator construction largely can temporarily prop up to avoid building in waters Support structure reduces bridge construction cost.The equilibrium problem rotated in bridge construction by swing is a critical issue, with control Swivel process bridge keeps safety and stability.

Jack loading force is manual record at present, during recording loading force while loading, when naked eyes Observe and stop load when significant sliding occurs in displacement then occur the loading force number before and after significant sliding phenomenon according to displacement Critical loading force is sentenced according to estimating.The mode precision that this manual record loading force and artificially rule of thumb estimating sentences critical force is not high, existing Environmental Risk is high, and estimate the critical value sentenced cause the quiet friction moment of maximum finally calculated and coefficient of friction it is bigger than normal or It is less than normal, it can not realize standardized work, construction quality is affected by human factors greatly.It in addition cannot be to data during recording Processing in real time and the load of feedback control power, most likely resulting in overload in this way causes to rotate out of control, and beam body is toppled, to peace The control of full blast danger is very limited.

Therefore, the above problem also letter is to be solved.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to provide one kind for judging that bridge rotates The device of critical balance, the purpose of this utility model are intended to improve testing efficiency, working security, final to realize that bridge rotating is applied Work increased quality and construction safety risk decline.

To achieve the above objectives, the technical scheme adopted by the utility model is that:

It is a kind of for judging the device of bridge rotation critical balance, described device includes:

Flexural pivot is rotated, is fixedly mounted on pier footing；

Beam body is set on the rotation flexural pivot, and the beam-ends of the beam body has the beam-ends for loading the beam body First jack and the second jack, the beam body are equipped with the first symmetrical pinboard close to one end of the rotation flexural pivot With the second pinboard；First pinboard and second pinboard are connected with respectively for measuring first pinboard and institute State the first displacement sensor and second displacement sensor of the displacement of the second pinboard；

Control device is connected with first jack and second jack, is applied to the beam for controlling Loading force on body；The control device is connected with first displacement sensor and the second displacement sensor, for obtaining Take the displacement of first pinboard and second pinboard.

Based on the above technical solution, the control device includes computer and controller；The controller and institute It is wired connected to state the first displacement sensor, the second displacement sensor, first jack, second jack.

Based on the above technical solution, the connection of the computer and the controller is to be wirelessly connected；The nothing Line connection includes the first wireless bridge and the second wireless bridge being connected with first wireless bridge.

Based on the above technical solution, the controller is also connected with safe early warning loudspeaker.

Based on the above technical solution, described device further includes solar panels and the storage that is connected with the solar panels Battery, the solar panels and battery are used for first displacement sensor, the second displacement sensor, described first Jack, second jack provide power supply.

Based on the above technical solution, first displacement sensor, the second displacement sensor be can be automatic Read any one in the displacement sensor of the dial gauges of data, stay wire sensor or radar range finder.

Based on the above technical solution, first displacement sensor, the second displacement sensor precision not Lower than 0.01mm.

Compared with the prior art, the advantages of the utility model are: the utility model includes changing existing artificial observation to sentence Critical loading force needed for disconnected test coefficient of maximum static friction, provide rotated in a kind of analysis Bridge Rotation Construction Technique it is critical flat The device of weighing apparatus, by the data of computer-automatic collection jack and displacement sensor realize test process fining load and The synchronous fining analysis of data, improves testing efficiency, realizes that key technology rotates flexural pivot confficient of static friction in Bridge Rotation Construction Technique The intelligent operation of weighing test；It is loaded by real time computer control jack, loading force size Real-time Feedback makes swivel bridges It is safely controllable during swivel, it avoids manually observing rotation flexural pivot sliding phenomenon in loading field, improves working security, The final promotion for realizing Bridge Rotation Construction Technique quality and construction safety risk decline.

Detailed description of the invention

Fig. 1 is a kind of for judging that bridge rotates the structural representation of the device of critical balance in the utility model embodiment Figure；

Fig. 2 is another for judging that bridge rotates the structural representation of the device of critical balance in the utility model embodiment Figure；

Fig. 3 is experiment of weighing initial schematic diagram when the friction moment of rotation flexural pivot is less than the unbalanced moments of beam body；

Fig. 4 is that experiment of weighing terminates schematic diagram when the friction moment of rotation flexural pivot is less than the unbalanced moments of beam body；

Fig. 5 is experiment of weighing initial schematic diagram when the friction moment of rotation flexural pivot is greater than the unbalanced moments of beam body；

Fig. 6 is that experiment of weighing terminates schematic diagram when the friction moment of rotation flexural pivot is greater than the unbalanced moments of beam body；

In figure: 1- beam body, 2- rotation flexural pivot, 3- pier footing, 4- computer, the first jack of 5-, the second jack of 6-, 7- second displacement sensor, the first displacement sensor of 8-, 10- controller, the first pinboard of 12-, the second pinboard of 13-, 14- Battery, 15- solar panels, the first wireless bridge of 16a-, the second wireless bridge of 16b-.

Specific embodiment

Clear, complete description is carried out below with reference to technical solution of the attached drawing to embodiment each in the utility model, is shown So, described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.It is practical based on this Novel embodiment, those of ordinary skill in the art's obtained all other reality without making creative work Example is applied, the range that the utility model is protected is belonged to.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.It should be pointed out that all attached drawings are illustrative expression.For the general of this field For logical technical staff, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.

The utility model is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.

Embodiment

It is shown in Figure 1, the utility model embodiment provide it is a kind of for judge bridge rotation critical balance device, Applied in rotator construction, described device includes beam body 1 and the rotation flexural pivot 2 that is fixedly mounted on pier footing 3；The beam body 1 beam-ends has the first jack 5 and the second jack 6, and first jack 5 and second jack 6 are for adding Carry the beam-ends of the beam body 1；The beam body 1 is equipped with the first symmetrical pinboard 12 close to one end of the rotation flexural pivot 2 With the second pinboard 13；First pinboard 12 and second pinboard 13 are connected with respectively for measuring first switching The first displacement sensor 8 and second displacement sensor 7 of the displacement of plate 12 and second pinboard 13；Control device, with First jack 5 is connected with second jack 6, for controlling the loading force being applied in the beam body 1；The control Device processed is connected with first displacement sensor 8 and the second displacement sensor 7, and loading force suffered by the beam body 1 is equal By increment Delta=100KN hierarchical loading, and steady load 1min, the control device obtain each load again after load every time The displacement of first pinboard 12 and second pinboard 13 when stablizing.

Further, the control device includes computing module and first judgment module；The computing module is according to every time The displacement of first pinboard 12 and second pinboard 13 that obtain, and carry out that X accordingly is calculated, X is calculated Formula be

In formula, S_NFor the flat of the sum of the displacement absolute value of the first pinboard 12 described in n-th and second pinboard 13 Mean value, S_N-1For the average value of the sum of the displacement absolute value of the N-1 times first pinboard 12 and second pinboard 13； Whether the value for the X that first judgment module is used to judge to be calculated is less than preset critical, and the preset critical is 0.67, if It is no, then stop loading the beam body 1, and define under current state as the rotation borderline balance state of beam body 1 and rotation flexural pivot 2； If so, continuing to load the beam body 1.

The control device obtains the position of the N-1 times, the first pinboard 12 and second pinboard 13 described in n-th It moves；The displacement relation first fit inequality of the first pinboard 12 and second pinboard 13 described in the N-1 times, the n-thWhen, first jack 5 and second jack 6 stop loading the beam body 1, and definition is current It is the rotation borderline balance state of beam body 1 and rotation flexural pivot 2 under state.

As shown in Figure 1, the control device includes computer 4 and the controller 10 for connecting the computer 4；The control Device 10 and first displacement sensor 8, the second displacement sensor 7, first jack 5, second jack 6 It is wired to be connected；First displacement sensor 8, second displacement sensor 7 be the dial gauge that can read data automatically, stay wire sensor or Any one precision in radar range finder etc. is not less than the displacement sensor of 0.01mm.

As shown in Fig. 2, the control device includes computer 4 and controller 10；The computer 4 and the controller 10 Connection be to be wirelessly connected, master controller 10 connect with the first wireless bridge 16a, the second wireless bridge 16b and the company of computer 4 It connects, wherein the first wireless bridge 16a and the second wireless bridge 16b is connected.The controller 10 and first displacement sensor 8, the second displacement sensor 7, first jack 5, second jack 6 are wired is connected；The controller 10 is also Safe early warning loudspeaker 17 are connected with, for carrying out alarm prompt；Described device further include solar panels 15 and with the solar panels 15 connected batteries 14, the solar panels 15 and battery 14 are used to provide power supply to described device.

Control device described in the utility model embodiment further includes the second judgment module, is used to judge whether the value of X to be small In default early warning value, wherein the default early warning value is less than preset critical, if it is not, then the control device carries out alarm and mentions Show；If so, continuing to load the beam body 1.

In initial loading, during first jack 5 and the 6 uniform hierarchical loading of the second jack, The average value S of the displacement absolute value of first pinboard 12 and second pinboard 13 uniformly increases, when loading moment connects When the critical friction moment of nearly rotation flexural pivot 2, S can be dramatically increased, and first jack 5 and second jack 6 do not stop Before only loading the beam body 1, the displacement according to first pinboard 12 and second pinboard 13 obtained every time is judged Whether the value for the X being accordingly calculated is less than default early warning value, wherein and the default early warning value is less than preset critical, If it is not, then the control device carries out alarm prompt, prompts relevant staff to improve early warning and guard, improve working security； If so, continuing to load the beam body 1.Specifically, the displacement relation of first pinboard 12 and second pinboard 13 The following calculation formula of first fit:

In formula, M < N, S_MFor the sum of the M times first pinboard 12 and displacement absolute value of second pinboard 13 Average value, S_M-1For the flat of the sum of the displacement absolute value of the M-1 times first pinboard 12 and second pinboard 13 Mean value.

The utility model embodiment applies also for calculating for rotating flexural pivot confficient of static friction, institute in Bridge Rotation Construction Technique Stating calculation method includes:

Step S1: after n-th load, stop the load to beam body 1, it is very heavy to obtain the N-1 times the first jack 5 and second The loading force of the corresponding beam body 1 of 6 load of top；

Step S2: the beam body 1 is calculated according to uneven experiment of weighing mathematical model and the known load force parameter Unbalanced moments；

Step S3: according to the calculation method of rotation flexural pivot confficient of static friction and 1 injustice of the beam body calculated by step S2 The confficient of static friction of the Calculating Torque during Rotary that weighs rotation flexural pivot 2.

Further, in step S2, according to uneven experiment of weighing mathematical model, if the friction moment of rotation flexural pivot 2 is small In the unbalanced moments of beam body 1, it is meant that after temporary consolidation is removed, rotation body portion is issued in the unbalanced moments effect of itself Raw rotation.As shown in figs. 34, it is assumed that 1 center of gravity of swivel is biased to west side, carries out uneven experiment of weighing at this time, turns 1 west side branch Point caving, makes swivel 1 that clockwise direction minor rotation occur in the upright plane along beam axis, while east side loading force is zero； Then west side fulcrum rises top, counter clockwise direction minor rotation occurs, while east side loading force is zero；Beam body 1 is calculated not The calculation method of trimming moment are as follows:

M_Z=(P_{It rises}-P_{It falls})L_West/ 2,

If the friction moment for rotating flexural pivot 2 is greater than the unbalanced moments of beam body 1, it is meant that after temporary consolidation is removed, swivel 1 It cannot rotate under the unbalanced moments effect of itself.Uneven experiment of weighing is carried out at this time, as shown in Fig. 5~6, respectively From 1 east, west side fulcrum top beam is turned, make swivel 1 that counterclockwise, small turn of clockwise direction occur in the upright plane along beam axis It is dynamic, the calculation method of the unbalanced moments of beam body 1 is calculated are as follows:

M_Z=(P_{It rises}-P_{It falls})L_West/ 2,

In formula, M_ZFor the unbalanced moments of beam body 1, P_{It falls}、P_{It rises}The load of fulcrum when respectively 1 west side caving of beam body, liter push up Power；P_East、P_WestRespectively the east of beam body 1, west side top beam when fulcrum loading force；L_East、L_WestRespectively beam body east, west side fulcrum are away from rotation The distance of 2 geometric center of flexural pivot.

Further, in step S3, the calculation method of the confficient of static friction is the frictional resistance using the rotation flexural pivot 2 Square is that the frictional resistance on the rotation flexural pivot 2 calculates the rotation to the sum of the torque of the rotation 2 center vertical transfer normal of flexural pivot The confficient of static friction of flexural pivot 2, calculation method are as follows:

In formula, μ is confficient of static friction, M_ZFor the friction moment of the rotation flexural pivot 2, α is rotation flexural pivot central angle half, R is rotating ball hinged ball radius, and G is the weight of the beam body.

The above method is also verified in practice, and theory obtains when calculating obtained confficient of static friction and preliminary operation Confficient of static friction is more consistent, provides scientific basis for the construction and Construction control of large span curve broad box girder swivel bridges, has Very strong practical function can obtain higher construction efficiency and economic benefit.

The utility model is not limited to above embodiment, for those skilled in the art, not Under the premise of being detached from the utility model principle, several improvements and modifications can also be made, these improvements and modifications are also considered as this reality Within novel protection scope.The content being not described in detail in this specification belongs to well known to professional and technical personnel in the field The prior art.

Claims (7)

1. a kind of for judging the device of bridge rotation critical balance, which is characterized in that described device includes:

It rotates flexural pivot (2), is fixedly mounted on pier footing (3)；

Beam body (1) is set on the rotation flexural pivot (2), and the beam-ends of the beam body (1) has for loading the beam body (1) Beam-ends the first jack (5) and the second jack (6), the beam body (1) close to it is described rotation flexural pivot (2) one end be equipped with Symmetrical the first pinboard (12) and the second pinboard (13)；First pinboard (12) and second pinboard (13) it is connected with the first displacement sensing for measuring first pinboard (12) and second pinboard (13) displacement respectively Device (8) and second displacement sensor (7)；

Control device is connected with first jack (5) and second jack (6), is applied to for control described Loading force in beam body (1)；The control device and first displacement sensor (8) and the second displacement sensor (7) It is connected, for obtaining the displacement of first pinboard (12) and second pinboard (13).

2. according to claim 1 for judging the device of bridge rotation critical balance, which is characterized in that the control dress It sets including computer (4) and controller (10)；The controller (10) and first displacement sensor (8), the second Displacement sensor (7), first jack (5), second jack (6) are wired to be connected.

3. according to claim 2 for judging the device of bridge rotation critical balance, which is characterized in that the computer (4) and the connection of the controller (10) is to be wirelessly connected；It is described be wirelessly connected include the first wireless bridge (16a) and with it is described Connected the second wireless bridge (16b) of first wireless bridge (16a).

4. according to claim 2 for judging the device of bridge rotation critical balance, which is characterized in that the controller (10) safe early warning loudspeaker (17) are also connected with.

5. according to claim 1 for judging the device of bridge rotation critical balance, which is characterized in that described device is also Including solar panels (15) and the battery (14) being connected with the solar panels (15), the solar panels (15) and battery (14) for first displacement sensor (8), the second displacement sensor (7), first jack (5), described Second jack (6) provides power supply.

6. according to claim 1 for judging the device of bridge rotation critical balance, which is characterized in that described first Displacement sensor (8), the second displacement sensor (7) are dial gauge, stay wire sensor or the radar survey that can read data automatically Any one in the displacement sensor of distance meter.

7. according to claim 1 for judging the device of bridge rotation critical balance, which is characterized in that described first Displacement sensor (8), the second displacement sensor (7) precision be not less than 0.01mm.