CN107884106B - Single bellows vertical force detection device and detection method for bridge support - Google Patents
Single bellows vertical force detection device and detection method for bridge support Download PDFInfo
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- CN107884106B CN107884106B CN201711201282.1A CN201711201282A CN107884106B CN 107884106 B CN107884106 B CN 107884106B CN 201711201282 A CN201711201282 A CN 201711201282A CN 107884106 B CN107884106 B CN 107884106B
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- vertical force
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 description 7
- 230000003068 static effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a vertical force detection device of single bellows and detection method that bridge beam supports used, including roof, bellows, bottom plate, draw and press pipe and pressure sensor, the both ends of bellows are sealing connection roof and bottom plate respectively, enclose into the sealed chamber that is used for filling inert liquid between bellows, roof and the bottom plate, be provided with the one end of drawing and pressing the pipe in the sealed chamber, the other end of drawing and pressing the pipe is connected with pressure sensor, calculate bridge beam supports vertical force through measuring the numerical value, adopt device and method to measure and need not redesign the support structure, the mounting means is simple, solve the vertical dynamometry difficult problem of support, provide technical support for bridge beam monitoring.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a single bellows vertical force detection device and a single bellows vertical force detection method for a bridge support.
Background
Along with the increase of the construction of expressways and railway bridges in China year by year, the test and monitoring of various loads of the bridges, including static, dynamic, impact loads and other vertical loads, has important practical significance for the operation of the bridges. The bridge support, namely the acquisition of bridge vertical counter-force monitoring data, is realized, and a technical basis can be provided for the health monitoring of the bridge.
At present, the bridge support has fewer vertical counter force measuring devices, and the conventional method is to install a detection element or device in the support, for example, a spherical multidirectional force measuring support (patent number CN 102912772A) is used for measuring force by arranging a standard sensor on the lateral side of a pressure-bearing wedge-shaped member of the support; a vertical intelligent force measuring support (patent number CN 102032959A) mainly adopts a special-shaped part to set a resistance strain gauge so as to realize force measurement; a vertical force-measuring bridge support and a force-measuring method thereof (patent number: CN 106192739A) realize force measurement by installing a force-measuring sensor between a middle seat plate and a lower seat plate. The above method for measuring the reaction force of the support needs to redesign the structure of the support, indirectly obtain the load of the support by detecting the load of the selected point, and whether the selection of the measurement point reasonably and directly influences the measurement accuracy.
Disclosure of Invention
In order to solve the technical problems, the invention provides the single bellows vertical force detection device and the single bellows vertical force detection method for the bridge support, which are used for measuring without redesigning the support structure, have simple installation mode, solve the problem of support vertical force measurement and provide technical support for bridge monitoring.
In order to achieve the technical purpose, the adopted technical scheme is as follows: the utility model provides a vertical force detection device of single bellows that bridge beam support was used, sets up in bridge beam support below, including roof, bellows, bottom plate, draw pressure pipe and pressure sensor, the both ends of bellows are sealing connection roof and bottom plate respectively, enclose into the sealed chamber that is used for filling inert liquid between bellows, roof and the bottom plate, be provided with the one end of drawing pressure pipe in sealed chamber, draw the other end of pressure pipe to be connected with pressure sensor.
The sealing cavity is also communicated with an inlet pipe and an outlet pipe.
The pressure guiding pipe is provided with a valve.
The inlet and outlet pipes are provided with valves.
A displacement sensor for measuring the distance between the top plate and the bottom plate is arranged between the top plate and the bottom plate.
An axial guiding structure is arranged between the top plate and the bottom plate.
The axial guiding structure consists of a groove arranged in the center of the top plate and a convex block matched with the groove and arranged in the center of the bottom plate.
The axial guiding device consists of a groove arranged in the center of the bottom plate and a convex block matched with the groove and arranged in the center of the top plate.
The method for detecting the vertical load of the bridge support by using the single-ripple Guan Shuxiang force detection device comprises the following steps:
firstly, filling inert liquid into a sealed cavity with the pressure of 0 for the first time until the cavity is completely filled, wherein the axial gap between a top plate and a bottom plate is 0;
step two, fixedly connecting a top plate below the bridge support, and fixedly connecting a bottom plate with a foundation to finish fixation;
step three, pressing the bridge support on the top plate, injecting inert liquid into the sealing wall for the second time, moving the top plate along the axial direction of the device, and moving the top plate for a certain distanceStopping the injection of the inert liquid, and obtaining the pressure P of the inert liquid in the sealed cavity by the pressure sensorAnd obtaining the vertical load F of the bridge support, wherein D is the inner diameter of the corrugated pipe, H is the wave height of the corrugated pipe, K is the axial rigidity of the corrugated pipe, and x is the axial displacement of the corrugated pipe.
Further, the distance H between the top plate and the bottom plate before the second filling of the inert liquid and before the non-mounting is measured by the displacement sensor 0 The displacement sensor measures the space H between the top plate and the bottom plate after the secondary inert liquid is filled in real time 1 The gap resulting from the separation of the top and bottom plates is Δh=h 1 -H 0 The method comprises the steps of carrying out a first treatment on the surface of the Setting Δh min Is the minimum value of the gap before the top plate is contacted with the bottom plate, when delta H<Δh min When the sealed cavity is filled with inert liquid, the inert liquid is needed to be filled into the sealed cavity; setting Δh max For the maximum value of the gap before the top plate and the bottom plate are contacted, delta H is less than or equal to delta H max The guide structure is prevented from being invalid and cannot bear side load due to the fact that the top plate and the bottom plate are separated too much.
The invention has the beneficial effects that: according to the scheme, the vertical load of the support is obtained by detecting the inert liquid pressure in the sealing cavity and calculating the axial displacement of the corrugated pipe, the measuring method is simple and visual, the vertical load of the support can be directly and accurately obtained, and the measuring error caused by unreasonable selection of measuring points is avoided; in addition, the structure of the existing support is not required to be changed, and the installation and replacement operations are convenient and fast.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a bellows structure;
FIG. 3 is a schematic view of the top and bottom plates of the present invention;
in the figure: 1. the device comprises a top plate, 2, a bottom plate, 3, a corrugated pipe, 4, a pressure guiding pipe, 5, a valve, 6, a pressure sensor, 7, inert liquid, 8, a pull rod, 9, a nut, 10, a displacement sensor, 11 and an inlet pipe and an outlet pipe.
Detailed Description
A single bellows vertical force detection device for bridge supports is composed of a top plate 1, a bottom plate 2, a bellows 3, bolts and nuts 9, a pull rod 8 and the like before transportation and installation. The pull rod 8 and the nut 9 are used for tensioning and installing the top plate 1, the bottom plate 2 and the corrugated pipe 3 into a whole, the bolts and the pull rod are taken down when the device is used, the sealing cavity formed by the top plate, the bottom plate and the corrugated pipe is filled with inert liquid which is difficult to compress and has certain fluidity, such as hydraulic oil or silicone oil, the top plate is connected with the bridge support, the bottom plate is fixedly connected with the foundation, when a load acts on the top plate through the support, the rigidity of the corrugated pipe is known and the axial deformation of the load is measurable, the external pressure sensor of the pressure guiding pipe is used for measuring the static pressure inside the sealing cavity, and the vertical load born by the support can be obtained through calculation because the action area of the static pressure is known.
As shown in figure 1, a single bellows vertical force detection device for bridge beam supports sets up in bridge beam supports below when using, including roof 1, bellows 3, bottom plate 2, draw pressure pipe 4 and pressure sensor 6, the both ends of bellows 3 are sealing connection roof 1 and bottom plate 2 respectively, roof 1 and the shape of bottom plate 2 is unlimited, preferably circular and square, guarantee the seal at bellows both ends can, the roof 1 moves down along bellows 3 axis direction when receiving the vertical force, enclose into the sealed chamber that is used for filling inert liquid 7 between bellows 3, roof 1 and the bottom plate 2, be provided with the one end of drawing pressure pipe 4 in the sealed chamber, the other end and the pressure sensor 6 of drawing pressure pipe 4 are connected, pressure sensor is used for measuring the pressure of inert liquid in the sealed chamber.
The sealed cavity is also communicated with an inlet pipe 11, and inert liquid can be filled into or discharged from the sealed cavity through the inlet pipe 11.
The pressure guiding pipe 4 is provided with a valve for closing the pressure guiding pipe pipeline.
The inlet and outlet pipe 11 is provided with a valve which is used for closing the pipeline channel of the inlet and outlet pipe.
A displacement sensor 10 for measuring the distance between the top plate 1 and the bottom plate 2 is arranged between the top plate 1 and the bottom plate 2, the distance between the top plate 1 and the bottom plate 2 can be measured in real time by the displacement sensor, and the change of the distance is the change of the gap between the bottom surface of the top plate 1 and the top surface of the bottom plate.
An axial guiding structure is arranged between the top plate 1 and the bottom plate 2, the structure does not influence the pressure in the sealing cavity, only the guiding function is needed, the top plate is prevented from being influenced by the pressure instead of the vertical backward inclination, the device is enabled to move in the axial direction of the corrugated pipe, and further the measurement is enabled to be more accurate.
As shown in fig. 3, the axial guide structure is not limited to the two forms described below as follows.
A. The axial guiding structure consists of a groove arranged in the center of the top plate 1 and a convex block matched with the groove and arranged in the center of the bottom plate 2.
B. The axial guiding device consists of a groove arranged in the center of the bottom plate 2 and a convex block matched with the groove and arranged in the center of the top plate 1.
The method for detecting the vertical load of the bridge support by using the single-ripple Guan Shuxiang force detection device comprises the following steps:
firstly, filling inert liquid into a sealed cavity with the pressure of 0 for the first time until the cavity is completely filled, wherein the axial gap between the groove and the lug is 0;
step two, fixedly connecting a top plate below the bridge support, and fixedly connecting a bottom plate with a foundation to finish fixation;
step three, pressing the bridge support on the top plate, injecting inert liquid into the sealing wall for the second time, moving the top plate along the axial direction of the device, stopping injecting the inert liquid after the top plate moves for a certain distance, obtaining the pressure P of the inert liquid in the sealing cavity by the pressure sensor, and obtaining the pressure P of the inert liquid in the sealing cavity by the pressure sensorAnd obtaining the vertical load F of the bridge support, wherein D is the inner diameter of the corrugated pipe, H is the wave height of the corrugated pipe, K is the axial rigidity of the corrugated pipe, and x is the axial displacement of the corrugated pipe.
The displacement sensor measures the distance H between the top plate and the bottom plate before the second filling of the inert liquid and before the non-installation 0 The displacement sensor measures the space H between the top plate and the bottom plate after the secondary inert liquid is filled in real time 1 Obtaining the top plate andthe gap separating the bottom plates is Δh=h 1 -H 0 The method comprises the steps of carrying out a first treatment on the surface of the Setting Δhmin as the minimum value of the gap before the top plate contacts the bottom plate, and when ΔH<Δh min When the measuring device is used, inert gas needs to be supplemented into the sealing cavity, so that the top plate and the bottom plate are prevented from being in direct contact, and the measuring result is prevented from being influenced; setting Δh max For the maximum value of the gap before the top plate and the bottom plate are contacted, delta H is less than or equal to delta H max The guide structure is prevented from being invalid and cannot bear side load due to the fact that the top plate and the bottom plate are separated too much.
Example 1
The invention comprises a top plate 1, a bottom plate 2, a corrugated pipe 3, a pressure guiding pipe 4, a pressure sensor 6, a displacement sensor 10, a pull rod 8, a nut 9, an inlet pipe 11 and the like. As shown in fig. 1, the top plate 1, the bottom plate 2 and the bellows 3 form a sealed cavity, and the cavity is filled with inert liquid such as hydraulic oil. The pressure sensor is communicated with the sealed cavity through the pressure guiding pipe and can detect the static pressure of inert liquid. The displacement sensor is arranged between the top plate and the bottom plate outside the corrugated pipe, detects the distance between the top plate and the bottom plate, and is used for calculating the gap between the top plate and the bottom plate in the corrugated pipe. The inlet and outlet pipe 11 is communicated with the sealing cavity, and can be used for injecting or leading out internal liquid through the sealing cavity with the inlet and outlet. As shown in fig. 3, the lower part of the top plate and the upper part of the bottom plate have an axial guiding function and can bear side load.
The device is filled with inert liquid when leaving factory, the top plate and the bottom plate are contacted with each other under the action of the pull rod nut, the pressure of the liquid in the device is zero, and the height of the device is H with the original height 0 The method comprises the steps of carrying out a first treatment on the surface of the After the pull rod is installed in place, the locking of the pull rod nut is released, inert liquid is filled into the sealed cavity through the inlet and outlet pipe, the pressure in the cavity is gradually increased, the top plate and the bottom plate are gradually separated, and the distance between the top plate and the bottom plate is H 1 . The distance separating the top plate from the bottom plate (i.e., the gap) is Δh=h 1 -H 0 Δh should satisfy the following conditions:
Δh min <ΔH<Δh max
Δh min for a minimum top plate to bottom plate gap, when ΔH is less than this value, there may be direct contact between the top plate and bottom plate, vertical loadingThe load is not completely borne by the liquid in the sealed cavity, affecting the measurement accuracy, and Δh needs to be greater than this value. In practical use, once ΔH is found<Δh min Inert liquid needs to be supplemented into the sealing cavity.
Δh max For maximum gap between the top plate and the bottom plate, ΔH needs to be smaller than the maximum gap in order to ensure that the device height does not change greatly when the sealing cavity leaks; and can prevent the guide structure from failing and not bearing side load caused by the overlarge separation of the top plate and the bottom plate.
At this time, the static pressure in the cavity is balanced with the vertical load of the device, and the vertical load of the device is calculated as shown in the following formula.
Wherein: p is the liquid pressure, D is the inner diameter of the corrugated tube, H is the wave height of the corrugated tube (as shown in figure 2), K is the axial stiffness of the corrugated tube, and x is the axial displacement of the corrugated tube.
Claims (9)
1. The utility model provides a vertical force detection device of single bellows that bridge beam supports was used, sets up in bridge beam supports below, its characterized in that: the device comprises a top plate (1), a corrugated pipe (3), a bottom plate (2), a pressure guiding pipe (4) and a pressure sensor (6), wherein two ends of the corrugated pipe (3) are respectively and hermetically connected with the top plate (1) and the bottom plate (2), a sealing cavity for filling inert liquid (7) is formed by enclosing the corrugated pipe (3), the top plate (1) and the bottom plate (2), one end of the pressure guiding pipe (4) is arranged in the sealing cavity, and the other end of the pressure guiding pipe (4) is connected with the pressure sensor (6);
the method for detecting the vertical load of the bridge support by using the single bellows vertical force detection device comprises the following steps:
firstly, filling inert liquid into a sealed cavity with the pressure of 0 for the first time until the cavity is completely filled, wherein the axial gap between a top plate and a bottom plate is 0;
step two, fixedly connecting a top plate below the bridge support, and fixedly connecting a bottom plate with a foundation to finish fixation;
step three, pressing and setting bridge supportInjecting inert liquid into the sealing wall for the second time on the top plate, moving the top plate along the axial direction of the device, stopping injecting the inert liquid after the top plate moves for a certain distance, and obtaining the pressure P of the inert liquid in the sealing cavity by the pressure sensorAnd obtaining the vertical load F of the bridge support, wherein D is the inner diameter of the corrugated pipe, H is the wave height of the corrugated pipe, K is the axial rigidity of the corrugated pipe, and x is the axial displacement of the corrugated pipe.
2. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 1, wherein: an inlet and outlet pipe (11) is also communicated in the sealing cavity.
3. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 1, wherein: the pressure guiding pipe (4) is provided with a valve.
4. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 2, wherein: and a valve is arranged on the inlet and outlet pipe (11).
5. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 1, wherein: a displacement sensor (10) for measuring the distance between the top plate (1) and the bottom plate (2) is arranged between the top plate (1) and the bottom plate (2).
6. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 1, wherein: an axial guiding structure is arranged between the top plate (1) and the bottom plate (2).
7. The single bellows vertical force detecting device for bridge supports according to claim 6, wherein: the axial guiding structure consists of a groove arranged in the center of the top plate (1) and a convex block matched with the groove and arranged in the center of the bottom plate (2).
8. The single bellows vertical force detecting device for bridge supports according to claim 6, wherein: the axial guiding device consists of a groove arranged at the center of the bottom plate (2) and a convex block matched with the groove and arranged at the center of the top plate (1).
9. A single bellows vertical force detection apparatus for a bridge bearing as defined in claim 1, wherein: the displacement sensor detects the distance H between the top plate and the bottom plate before filling and after not mounting the inert liquid for the second time 0 The displacement sensor measures the space H between the top plate and the bottom plate after the secondary inert liquid is filled in real time 1 The gap resulting from the separation of the top and bottom plates is Δh=h 1 -H 0 The method comprises the steps of carrying out a first treatment on the surface of the Setting Δh min Is the minimum value of the gap before the top plate is contacted with the bottom plate, when delta H<Δh min When the sealed cavity is filled with inert liquid, the inert liquid is needed to be filled into the sealed cavity; setting Δh max For the maximum value of the gap before the top plate and the bottom plate are contacted, delta H is less than or equal to delta H max The guide structure is prevented from being invalid and cannot bear side load due to the fact that the top plate and the bottom plate are separated too much.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711201282.1A CN107884106B (en) | 2017-11-27 | 2017-11-27 | Single bellows vertical force detection device and detection method for bridge support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711201282.1A CN107884106B (en) | 2017-11-27 | 2017-11-27 | Single bellows vertical force detection device and detection method for bridge support |
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| CN107884106B true CN107884106B (en) | 2023-11-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110174192A (en) * | 2019-04-26 | 2019-08-27 | 洛阳双瑞特种装备有限公司 | A kind of vertical device for measuring force and force measuring method |
| CN110595646A (en) * | 2019-05-01 | 2019-12-20 | 河南交院工程技术有限公司 | Force measuring device |
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| CN2775634Y (en) * | 2005-02-08 | 2006-04-26 | 武汉合力开关有限公司 | Novel pressure sensor |
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| CN103953853A (en) * | 2014-04-22 | 2014-07-30 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
| CN107059606A (en) * | 2017-06-14 | 2017-08-18 | 中国铁路设计集团有限公司 | A kind of bridge health monitoring bearing and its monitoring method |
| CN207622907U (en) * | 2017-11-27 | 2018-07-17 | 洛阳双瑞特种装备有限公司 | A kind of vertical force checking device of single bellows of bridge pad |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4759838B2 (en) * | 2000-11-08 | 2011-08-31 | 株式会社デンソー | Load detection device |
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2017
- 2017-11-27 CN CN201711201282.1A patent/CN107884106B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2775634Y (en) * | 2005-02-08 | 2006-04-26 | 武汉合力开关有限公司 | Novel pressure sensor |
| CN200979466Y (en) * | 2006-12-14 | 2007-11-21 | 柳州欧维姆机械股份有限公司 | A force measurement sensor |
| CN101201275A (en) * | 2006-12-14 | 2008-06-18 | 柳州欧维姆机械股份有限公司 | Sensor for measuring force as well as method for measuring pre-stress anchor wire and bridge support stress |
| CN103953853A (en) * | 2014-04-22 | 2014-07-30 | 东莞中子科学中心 | Device for balancing pressure fluctuation of liquid circulation loop |
| CN107059606A (en) * | 2017-06-14 | 2017-08-18 | 中国铁路设计集团有限公司 | A kind of bridge health monitoring bearing and its monitoring method |
| CN207622907U (en) * | 2017-11-27 | 2018-07-17 | 洛阳双瑞特种装备有限公司 | A kind of vertical force checking device of single bellows of bridge pad |
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