CN111855560A - Top tension and compression type cable saddle anti-slip test assembly - Google Patents
Top tension and compression type cable saddle anti-slip test assembly Download PDFInfo
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- CN111855560A CN111855560A CN202010510279.3A CN202010510279A CN111855560A CN 111855560 A CN111855560 A CN 111855560A CN 202010510279 A CN202010510279 A CN 202010510279A CN 111855560 A CN111855560 A CN 111855560A
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- 238000012360 testing method Methods 0.000 title claims abstract description 77
- 238000007906 compression Methods 0.000 title claims abstract description 11
- 230000006835 compression Effects 0.000 title claims description 4
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 239000000306 component Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000005192 partition Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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- 239000008358 core component Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
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- 238000004088 simulation Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention discloses a top tension-compression type cable saddle anti-sliding test assembly which comprises a saddle and a tension part, wherein the saddle and the tension part are respectively arranged on a test table top of a test bed; the tensioning part is provided with a pushing mechanism for providing tension, the pushing mechanism is connected with the top end of the saddle through a pull rod, and the bottom end of the saddle is provided with a swinging mechanism; and a cable for testing penetrates through the saddle and is carried on the saddle, two ends of the cable are respectively connected with two ends of the test bed, and two connecting parts of the cable and the test bed are provided with tension force measuring sensors. Through the structural design of this test assembly for the pulling of saddle that stretch-draw portion accomplished through the top of saddle in this test assembly, thereby realize the relative movement of saddle and cable, and when taking place relative displacement between cable and saddle, accomplish the measurement of cable both ends pulling force, thereby calculate coefficient of friction based on the measuring result.
Description
Technical Field
The invention belongs to the technical field of suspension bridges, and particularly relates to a top tension-compression type cable saddle anti-sliding test assembly.
Background
The calculation of the slip resistance of the cable saddle in the road suspension bridge design specification (JTG/T D65-05-2015) does not take into account the influence of the diaphragm, nor does the large variation in the dimensions of the individual channels give a relevant explanation of the influence on the slip resistance. In order to verify the reliability of the core component and ensure the structure safety, an anti-sliding test is required to be carried out, and the anti-sliding coefficient of the steel wire in the saddle groove of the thick partition plate of the wide groove path is tested; verifying whether the structural strength of the cable saddle is safe; the influence degree of the thickness of the partition board and the width of the channel on the anti-slip coefficient is qualitatively and quantitatively researched.
The test saddle structure for the anti-sliding test should restore the stress form of the solid bridge as much as possible to obtain the test result which is closest to the actual test result.
In earlier skid tests, the test saddle was fixed directly to the test bench, as shown in fig. 1. And (4) performing a skid resistance test in a manner of tensioning at one end of the main cable. The multi-beam cable strand is difficult to stretch and draw simultaneously, the operation difficulty is extremely high, the expansion amount of the main cable steel wire on the side span side before sliding cannot be compensated, the sliding can be caused in advance theoretically, and the measured friction coefficient is smaller.
And the relative sliding of the main cable and the saddle can be realized only by a pulling device with extremely large tonnage. The cost of large tonnage pulling devices increases in geometric multiples as tonnage increases. Meanwhile, the pulling device is high in price, large in size, heavy in weight and very high in operation difficulty in a limited installation space.
Therefore, there is a need for a new saddle structure that can effectively perform the tension test.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a top tension-compression type cable saddle anti-slip test assembly.
The purpose of the invention is realized by the following technical scheme:
a top tension-compression type cable saddle anti-sliding test assembly comprises a saddle and a tension part, wherein the saddle and the tension part are respectively arranged on a test table top of a test bed; the tensioning part is provided with a pushing mechanism for providing tension, the pushing mechanism is connected with the top end of the saddle through a pull rod, and the bottom end of the saddle is provided with a swinging mechanism; and a cable for testing penetrates through the saddle and is carried on the saddle, two ends of the cable are respectively connected with two ends of the test bed, and two connecting parts of the cable and the test bed are provided with force measuring sensors.
According to a preferred embodiment, the pull rod is arranged in a horizontal direction.
According to a preferred embodiment, stretch-draw portion still includes reaction frame, first coupling assembly and connector, the reaction frame is fixed in on the test bench of test bench, the thrusting mechanism support through the reaction with the top of reaction frame is connected.
According to a preferred embodiment, the pushing mechanism is connected with the pull rod through a first connecting assembly, and the tail end of the pull rod is provided with a connector and is connected with the top end of the saddle through the connector.
According to a preferred embodiment, the counter-force brace is a jacking arm of the jacking mechanism.
According to a preferred embodiment, a sensor assembly is further provided between the first connecting assembly and the pull rod.
According to a preferred embodiment, the top end of the saddle is provided with a raised anchor beam structure, and the clamping or pin connection of the connecting head is completed through the anchor beam.
According to a preferred embodiment, said jacking mechanism is constituted by a jack jacking device.
According to a preferred embodiment, the reaction frame is a frame structure.
According to a preferred embodiment, the reaction frame is connected to the test stand by welding or bolting.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
The invention has the beneficial effects that: in the test assembly, the pulling force F provided by the pushing mechanism acts on the top of the main cable saddle through the pull rod and is consistent with equivalent action points of the cable force Fc of the cable and the friction force F of the cable and the saddle groove of the saddle. The action direction of the pulling force F is horizontal, so that the model selection tonnage of the pushing mechanism is small, and the installation and the operation are convenient. The relative sliding of the cable and the saddle can be realized only by a pulling device with extremely large tonnage when the traditional technology is adopted. The cost of large tonnage pulling devices increases in geometric multiples as tonnage increases. Namely, the position of the pushing mechanism is arranged, so that the test cost is greatly saved.
Drawings
FIG. 1 is a schematic structural view of a fixed main cable saddle test stand used in the prior art;
FIG. 2 is a schematic view of the test stand configuration of the present invention;
FIG. 3 is a structural cross-sectional view of a test assembly of the present invention;
FIG. 4 is a schematic perspective view of the test assembly of the present invention;
FIG. 5 is a force diagram of a test assembly of the present invention;
the test platform comprises a test platform 100, a cable 101, a load cell 102, a cable clamp 103, a saddle 200, a swinging support 201, a main saddle support 202, a tensioning part 300, a reaction frame 301, a pushing mechanism 302, a reaction support 303, a first connecting component 304, a sensor component 305, a pull rod 306 and a connector 307.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, it should be noted that, in the present invention, if the specific structures, connection relationships, position relationships, power source relationships, and the like are not written in particular, the structures, connection relationships, position relationships, power source relationships, and the like related to the present invention can be known by those skilled in the art without creative work on the basis of the prior art.
Example 1:
referring to fig. 2 to 5, the invention discloses a top tension-compression type cable saddle anti-sliding test assembly. The test assembly includes a saddle 200 and a tension portion 300. The saddle 200 and the tensioning part 300 are respectively arranged on the test table top of the test table 100.
By simulating the force application condition of the actual bridge to the cable 101, a preset tension is applied to the two ends of the cable 101 by the test bed 100. The saddle 200 is driven by the tensioning part 300 to realize the relative displacement of the saddle 200 and the cable 101 carried by the saddle 200, and the tension force sensors 102 on the two sides of the test bed 100 finish the respective measurement of the tension force at the two ends of the cable 101 when the cable 101 and the saddle 200 move relatively. Thus, the measurement of the friction coefficient of the cable 101 with the saddle 200 in a specific simulation scenario is completed through the two measured tension magnitudes and the included angle of the two tension magnitudes.
Preferably, the bottom end of the saddle 200 is provided with a swing support 201, and the swing support 201 is connected to the surface of the test bed 100. The top of swing support 201 is protruding form cambered surface structure, the corresponding radius of cambered surface structure correspondence pitch arc is R. And a raised limit trapezoidal structure is further arranged in the middle of the top of the swing support 201.
Preferably, the main saddle support 202 of the saddle 200 is movably connected to the swing support 201 and can be rotated within a predetermined angle.
Further, the bottom surface of the main saddle support 202 is of a planar structure, and the bottom surface of the main saddle support 202 is provided with a containing groove for containing the limit trapezoidal structure of the swing support 201. So that the main saddle bearing 202 can roll or swing with respect to the swing bearing 201 when the main saddle bearing 202 is fitted on the swing bearing 201.
Preferably, the tensioning portion 300 includes at least a reaction frame 301, a pushing mechanism 302, a first connecting assembly 304, a sensor assembly 305, a pull rod 306, and a connector 307.
Preferably, the reaction frame 301 is fixed on the test table top of the test table 100. Further, the reaction frame 301 has a right trapezoid frame structure, and the contact surface with the test bed 100 is the longer bottom side of the trapezoid structure.
Preferably, the reaction frame 301 is connected to the test bed 100 by welding or bolting.
Preferably, the ejector mechanism 302 is connected to the top end of the saddle 200 via a tie rod 306.
Further, the top end of the saddle 200 is provided with a convex anchor beam structure, and the clamping or pin connection of the connecting head 307 at the end of the pull rod 302 is completed through the anchor beam. And the setting direction of the pull rod 306 is horizontal setting. By orienting the pull rod 306, the pushing mechanism 302 is facilitated to provide a relatively low force to accomplish the pulling of the saddle 200.
Preferably, the pushing mechanism 302 is connected to the top end of the reaction frame 301 through its reaction support 303. Wherein, the reaction support 303 is a jacking arm of the jacking mechanism 302.
That is, the jacking mechanism 302 applies the jacking reaction force to the reaction frame 304 through the force transmission of the reaction support 303, and the pull rod 306 is synchronously pulled by the jacking mechanism 302 through the first connecting component 304 to complete the pulling of the pull rod 306.
Further, the thrusting mechanism 302 may be constituted by a jack device.
Preferably, the pushing mechanism 302 is connected to the pull rod 306 through a first connecting assembly 304, and the end of the pull rod 306 is provided with a connector 307 and is connected to the top end of the saddle 200 through the connector 307.
Preferably, a sensor assembly 305 is further disposed between the first connecting assembly 304 and the pull rod 306, and the sensor assembly 305 is used for measuring the pulling force. The structural arrangement of the sensor assembly 305 is beneficial to enabling a tester to grasp the tension change condition provided by the tensioning part 300 in real time.
Preferably, a cable 101 for testing is inserted through and mounted on the saddle 200, both ends of the cable 101 are connected to both ends of the test bed 100, respectively, and load cells 102 are provided at both connections of the cable 101 and the test bed 100.
When a friction coefficient measurement test is performed, the test bench 100 completes the application of a preset tension to the cable 101 based on the actual tension applied to the cable by the object bridge to be simulated. The tension part 300 pulls the saddle 200, so that the saddle 200 and the cable 101 carried by the saddle are slid relatively. And the measurement of the tension of the two ends of the cable is completed through the load cell 102 at the moment of sliding. Based on the measured tension F of the tensioned end of the cable 101 ctTension F of the opposite slack end of the cable 101clAnd the included angle of the two tension forces to complete the calculation of the friction coefficient.
In summary, the present invention discloses the structural design of the test assembly, in the test assembly, the pulling force F provided by the pushing mechanism 302 acts on the top of the main cable saddle through the pull rod 306, and is consistent with the equivalent action point of the cable force Fc of the cable 101 and the friction force F between the cable 101 and the saddle groove of the saddle 200. The action direction of the pulling force F is horizontal, so that the model selection tonnage of the pushing mechanism is small, and the installation and the operation are convenient. The relative sliding of the cable and the saddle can be realized only by a pulling device with extremely large tonnage when the traditional technology is adopted. The cost of large tonnage pulling devices increases in geometric multiples as tonnage increases. Namely, the position of the pushing mechanism is arranged, so that the test cost is greatly saved.
Meanwhile, the cambered surface swing support 201 at the bottom of the saddle 200 is matched with the main saddle support 202 to form a flexible swing mechanism, so that the compensation for the elastic expansion amount of the cable can be completed through the swing of the saddle 200 before the main cable steel wire slides. The problem of premature slippage caused solely by elastic deformation of the cable 101 is avoided. Thereby ensuring the reliability of the friction coefficient measurement in the anti-sliding test process.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will. Numerous combinations will be known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The top tension-compression type cable saddle anti-slip test assembly is characterized by comprising a saddle (200) and a tension part (300), wherein the saddle (200) and the tension part (300) are respectively arranged on a test table top of a test bed (100);
the tensioning part (300) is provided with a pushing mechanism (302) for providing tension, the pushing mechanism (302) is connected with the top end of the saddle (200) through a pull rod (306), and the bottom end of the saddle (200) is provided with a swinging mechanism;
a cable (101) for testing penetrates through and is mounted on the saddle (200), two ends of the cable (101) are respectively connected with two ends of the test bed (100), and load cells (102) are arranged at two connecting positions of the cable (101) and the test bed (100).
2. A top tension saddle anti-slip test assembly according to claim 1, wherein said tension section (300) further comprises a reaction frame (301), a first connection component (304) and a connector (307),
the reaction frame (301) is fixed on a test table top of the test bed (100), and the pushing mechanism (302) is connected with the top end of the reaction frame (301) through a reaction support (303).
3. The top tension saddle anti-slip test assembly as claimed in claim 2, wherein said pushing mechanism (302) is connected to said pull rod (306) via a first connecting component (304),
the tail end of the pull rod (306) is provided with a connector (307) and is connected with the top end of the saddle (200) through the connector (307).
4. A top tension and compression cable saddle slippage resistance test assembly as set forth in claim 3, wherein said reaction brace (303) is a jacking arm of said jacking mechanism (302).
5. A top tension saddle anti-slip test assembly as claimed in claim 3 wherein a sensor assembly (305) is further provided between said first connector assembly (304) and said pull rod (306).
6. A top tension-compression saddle anti-slip test assembly as claimed in claim 3, wherein said saddle (200) has a raised anchor beam structure at the top end and said connector (307) is snapped or pinned by said anchor beam.
7. A top tension and compression cable saddle anti-slip test assembly as claimed in claim 3, wherein said jacking mechanism (302) is comprised of a jack jacking device.
8. A top tension saddle anti-slip test assembly as claimed in claim 2, wherein said reaction frame (301) is of frame construction.
9. A top tension saddle anti-slip test assembly as claimed in claim 3, wherein said reaction frame (301) is connected to said test stand (100) by welding or bolting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010510279.3A CN111855560A (en) | 2020-06-08 | 2020-06-08 | Top tension and compression type cable saddle anti-slip test assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010510279.3A CN111855560A (en) | 2020-06-08 | 2020-06-08 | Top tension and compression type cable saddle anti-slip test assembly |
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| CN111855560A true CN111855560A (en) | 2020-10-30 |
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| CN202010510279.3A Pending CN111855560A (en) | 2020-06-08 | 2020-06-08 | Top tension and compression type cable saddle anti-slip test assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264443A (en) * | 2021-12-24 | 2022-04-01 | 重庆编福科技有限公司 | Vibration test stand with double table-boards |
| CN114358629A (en) * | 2022-01-10 | 2022-04-15 | 云南大学 | Anti-skid safety assessment method for straddle type cable clamp |
| CN114518225A (en) * | 2022-02-21 | 2022-05-20 | 云南大学 | Cable clamp anti-sliding bearing capacity test device and method based on suspender tensioning |
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| CN202075142U (en) * | 2011-05-18 | 2011-12-14 | 四川天元机械工程股份有限公司 | Anti-sliding test device for rope clip of rope suspension bridge |
| CN105220614A (en) * | 2014-12-23 | 2016-01-06 | 德阳天元重工股份有限公司 | A kind of pivoted axle falls apart cable saddle |
| CN106906744A (en) * | 2017-03-02 | 2017-06-30 | 西南交通大学 | A kind of critical packaged type main cable saddle for main push-towing rope antiskid |
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| CN212410041U (en) * | 2020-06-08 | 2021-01-26 | 中交二公局第二工程有限公司 | Cable saddle anti-slip test assembly |
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2020
- 2020-06-08 CN CN202010510279.3A patent/CN111855560A/en active Pending
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| CN202075142U (en) * | 2011-05-18 | 2011-12-14 | 四川天元机械工程股份有限公司 | Anti-sliding test device for rope clip of rope suspension bridge |
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| CN106906744A (en) * | 2017-03-02 | 2017-06-30 | 西南交通大学 | A kind of critical packaged type main cable saddle for main push-towing rope antiskid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264443A (en) * | 2021-12-24 | 2022-04-01 | 重庆编福科技有限公司 | Vibration test stand with double table-boards |
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| CN114518225A (en) * | 2022-02-21 | 2022-05-20 | 云南大学 | Cable clamp anti-sliding bearing capacity test device and method based on suspender tensioning |
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