CN113049164B - Inhaul cable length adjusting device for indoor test model of suspension cable crossing structure - Google Patents
Inhaul cable length adjusting device for indoor test model of suspension cable crossing structure Download PDFInfo
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- CN113049164B CN113049164B CN201911365850.0A CN201911365850A CN113049164B CN 113049164 B CN113049164 B CN 113049164B CN 201911365850 A CN201911365850 A CN 201911365850A CN 113049164 B CN113049164 B CN 113049164B
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- 238000005259 measurement Methods 0.000 claims description 14
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- 238000009440 infrastructure construction Methods 0.000 abstract 1
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- 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
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
The invention discloses a stay cable length adjusting device for an indoor test model of a suspension cable crossing structure, and belongs to the field of infrastructure construction. In the device, a tension and displacement measuring assembly comprises a body; the pull force scale and the displacement scale are arranged on two sides of the body; a spring suspended on the upper part of the body; a dowel bar connected with the spring; the two ends of the transverse pointer are respectively used for indicating the tension scale and the displacement scale; the rotating pointer is arranged at the lower end of the dowel bar and is used for indicating the annular scale at the top of the displacement adjusting assembly; the displacement adjusting assembly is connected with the lower end of the dowel bar and rotates to adjust the displacement of the target inhaul cable in the vertical direction; cable fixture block to fixed target cable, it includes: the cable pulling device comprises a fixture block body with a vertical through hole and adjusting clamps respectively in threaded connection with two sides of the fixture block body, wherein the vertical through hole is used for enabling a target cable to pass through. The device can adjust the pulling force and the displacement of the target inhaul cable with the size reduced in proportion.
Description
Technical Field
The invention relates to the field of infrastructure, in particular to a stay cable length adjusting device for an indoor test model of a suspension cable crossing structure.
Background
During the laying process of natural gas or crude oil pipelines, a span structure is usually used for spanning special sections such as high-fall undulating terrain, wide rivers and the like. In order to study the stress and displacement change conditions of the span structure of the suspension cable under the bridge state under the influence of factors such as wind load, earthquake load, pigging load and the like, an indoor experimental model with a reduced scale is often required to be built.
The indoor experimental model of the span structure of the suspension cable is reduced in proportion when being built, compared with a prototype structure of the span structure of the suspension cable, the internal force of the inhaul cable of the indoor experimental model of the span structure of the suspension cable is greatly reduced, and in order to balance the stress of a cable system, when the inhaul cable obtains corresponding stress, the length of the inhaul cable after being reduced in proportion needs to be micro-adjusted, so that the inhaul cable after being subjected to the stress balance after being subjected to the length fine adjustment. At present, a stay cable (generally a thin steel wire rope) with a reduced proportion is fixed by using a U-shaped lock catch chuck, a brake cable chuck or a double-hole screw wire locking device with minimum specifications and then is subjected to length adjustment, and meanwhile, a spring tension meter is used for measuring the tension force applied to the stay cable.
In the process of implementing the invention, the inventor finds that the prior art has at least the following technical problems:
u type hasp chuck, brake cable chuck or diplopore screw locking line ware etc. can't be stable with the cable lock, and the spring tensiometer can only measure the pulling force that the cable received, and can't be used for carrying out the micro-adjustment to the length of cable.
Disclosure of Invention
In view of this, the present invention provides a cable length adjusting device for a suspension cable crossing structure indoor test model, which can solve the above technical problems.
Specifically, the method comprises the following technical scheme:
a cable length adjustment device for a laboratory test model of a catenary span structure, the device for adjusting tension and displacement of a target cable having a scaled-down size, the device comprising: the device comprises a tension and displacement measuring assembly, a displacement adjusting assembly and a stay cable clamping block;
the tension and displacement measuring assembly comprises: a body;
the pull force scale and the displacement scale are correspondingly arranged on the left side and the right side of the body;
a spring suspended from an upper portion of the body;
a dowel bar connected with the lower end of the spring;
the transverse pointer is arranged at the upper end of the dowel bar, and two ends of the transverse pointer are respectively used for indicating the tension scale and the displacement scale;
the rotating pointer is arranged at the lower end of the dowel bar and used for indicating the annular scale at the top of the displacement adjusting assembly;
the displacement adjusting assembly is connected with the lower end of the dowel bar and is rotated to adjust the displacement of the target inhaul cable in the vertical direction;
the target stay cable is respectively connected with the top of the tension and displacement measuring assembly and the bottom of the displacement adjusting assembly through the stay cable clamping block;
wherein, the cable fixture block includes: the cable pulling fixture comprises a fixture block body with a vertical through hole and two adjusting clamps which are respectively in threaded connection with parts, located on two sides of the vertical through hole, of the fixture block body, wherein the vertical through hole is used for enabling the target cable to penetrate through.
In one possible implementation, the vertical through hole is in a kidney-shaped hole shape.
In one possible implementation, the displacement adjustment assembly is connected to the tension and displacement measurement assembly by a ball and socket joint.
In one possible implementation, the displacement adjustment assembly includes: the adjusting bolt is connected with the spherical universal joint;
the adjusting nut is in threaded connection with the adjusting bolt;
and the inhaul cable connecting piece is connected with the adjusting nut and used for hanging the target inhaul cable.
In one possible implementation, the cable connector includes: the two transverse connecting sections are respectively connected with the left side and the right side of the adjusting nut;
and the two ends of the vertical connecting section are simultaneously connected with the two transverse connecting sections, and the vertical connecting section is used for hanging the target inhaul cable.
In one possible implementation, the vertical connecting section is in a V-shaped structure.
In one possible embodiment, the transverse connection section is rotatably connected to the adjusting nut.
In one possible implementation, the tension scale includes: a main tension scale and a vernier tension scale.
In one possible implementation, the displacement scale includes: a displacement main scale and a displacement vernier.
In a possible implementation manner, the top of the body is provided with a hanging hole.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the inhaul cable length adjusting device for the suspension cable crossing structure indoor test model provided by the embodiment of the invention can adjust the tension and displacement of a target inhaul cable with the size reduced in proportion. During the application, divide into two sections with the target cable, the hypomere is fixed and is hung in the bottom of displacement adjustment subassembly through the cable fixture block, and the top of pulling force and displacement measurement subassembly is fixed and connected through the cable fixture block to the upper segment, realizes this cable length adjustment device and target cable's stable connection. After the tension and displacement measurement assembly is reset to zero and calibrated, the displacement adjusting assembly is rotated to enable the downward displacement of the upper section target cable to drive the dowel bar to move downwards, the transverse pointer is driven to move downwards when the dowel bar moves downwards, when the indicating position of the transverse pointer on the tension scale indicates that the target cable obtains corresponding stress, the rotation of the displacement adjusting assembly is stopped, and the indicating position of the transverse pointer on the displacement scale is read simultaneously to obtain the displacement S1 caused by spring deformation. And acquiring the downward displacement S2 of the displacement adjusting component according to the rotation number of the displacement adjusting component and the indication position of the rotating pointer on the annular scale, wherein the shortened distance S3 of the target cable in the vertical direction is the downward displacement S2 of the displacement adjusting component minus the displacement S1 caused by the deformation of the spring. Therefore, the device provided by the embodiment of the invention can be used for measuring the pulling force of the target inhaul cable, so that the target inhaul cable obtains corresponding stress, and the vertical displacement of the target inhaul cable can be simultaneously and finely adjusted in the process, so that the stress of the target inhaul cable is balanced. In addition, the target inhaul cable with small size is fixed by the inhaul cable clamping block, and the two adjusting clamps are screwed on the clamping block body and can be used for stably locking the target inhaul cable, so that a stable fixing effect is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a guy cable length adjusting device for a laboratory test model of a suspension cable crossing structure according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a tension and displacement measurement assembly provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural view of a cable clamping block according to an embodiment of the present invention;
fig. 4 is a schematic view of a connection relationship between a dowel bar and a displacement adjusting assembly according to an embodiment of the present invention.
The reference numerals denote:
1-a tension and displacement measuring component, 2-a displacement adjusting component, 3-a cable clamping block, 4-a spherical universal joint,
101-body, 102-tension scale, 103-displacement scale, 104-spring, 105-dowel bar,
106-lateral pointer, 107-rotary pointer, 108-annular scale, 109-hanging hole,
201-adjusting bolt, 202-adjusting nut, 203-inhaul cable connecting piece,
301-fixture block body, 302-vertical through hole, 303-adjusting fixture.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the invention provides a stay cable length adjusting device for a suspension cable crossing structure indoor test model, wherein the stay cable length adjusting device can be used for adjusting the tension and displacement of a target stay cable with the size reduced in proportion, as shown in the attached figure 1, the device comprises: the device comprises a tension and displacement measuring component 1, a displacement adjusting component 2 and a pull cable clamping block 3.
As shown in fig. 1 and 2, the tension and displacement measuring assembly 1 includes: a body 101; a tension scale 102 and a displacement scale 103 which are correspondingly arranged at the left side and the right side of the body 101; a spring 104 suspended from the upper portion of the body 101; a dowel bar 105 connected to the lower end of the spring 104; a transverse pointer 106 arranged at the upper end of the dowel bar 105, wherein two ends of the transverse pointer 106 are respectively used for indicating the tension scale 102 and the displacement scale 103; a rotary pointer 107 is provided at the lower end of the dowel bar 105, and the rotary pointer 107 is used for indicating an annular scale 108 (see fig. 4) at the top of the displacement regulating assembly 2.
The displacement adjusting assembly 2 is connected with the lower end of the dowel bar 105, and the displacement of the target cable is adjusted in the vertical direction by rotating the displacement adjusting assembly 2; through the cable clamping block 3, the target cable is respectively connected with the top of the tension and displacement measuring component 1 and the bottom of the displacement adjusting component 2.
Wherein, as shown in fig. 3, the cable latch 3 includes: the cable clamping device comprises a clamping block body 301 with a vertical through hole 302 and two adjusting clamps 303 which are respectively in threaded connection with parts, located on two sides of the vertical through hole 302, of the clamping block body 301, wherein the vertical through hole 302 is used for enabling a cable to pass through.
The inhaul cable length adjusting device for the suspension cable crossing structure indoor test model provided by the embodiment of the invention can adjust the tension and displacement of a target inhaul cable with the size reduced in proportion. During the application, divide into two sections with the target cable, the hypomere is fixed and is hung in the bottom of displacement adjustment subassembly 2 through cable fixture block 3, and the top of pulling force and displacement measurement subassembly 1 is fixed and is connected through cable fixture block 3 to the upper segment, realizes this cable length adjusting device and target cable's stable connection. After the tension and displacement measuring assembly 1 is reset to zero and calibrated, the displacement adjusting assembly 2 is rotated to enable the upper section of the target cable to displace downwards, meanwhile, the dowel bar 105 is driven to move downwards, the transverse pointer 106 is driven to move downwards when the dowel bar 105 moves downwards, when the indicating position of the transverse pointer 106 on the tension scale 102 indicates that the target cable obtains corresponding stress, the rotation of the displacement adjusting assembly 2 is stopped, and meanwhile, the indicating position of the transverse pointer 106 on the displacement scale 103 is read to obtain the displacement S1 caused by the deformation of the spring 104. The downward displacement S2 of the displacement adjusting assembly 2 is obtained according to the number of rotations of the displacement adjusting assembly 2 and the indication position of the rotating pointer 107 on the annular scale 108, and the distance S3 shortened in the vertical direction of the target cable is the sum of the downward displacement S2 of the displacement adjusting assembly minus the displacement S2 of the displacement S1 in the vertical direction caused by the deformation of the spring and the displacement S1 caused by the deformation of the spring 104, so that the displacement S2 in the vertical direction of the upper target cable can be obtained. Therefore, the device provided by the embodiment of the invention can be used for measuring the pulling force of the target inhaul cable, so that the target inhaul cable obtains corresponding stress, and the vertical displacement of the target inhaul cable can be simultaneously and finely adjusted in the process, so that the stress of the target inhaul cable is balanced. In addition, the cable fixture block 3 is used for fixing a target cable with small size, and the two adjusting clamps 303 are screwed on the fixture block body 301, so that the target cable can be stably locked, and a stable fixing effect is achieved.
It is understood that the vertical displacement S3 of the wire can also be understood as a displacement S4 of the main wire connected to the upper stage target wire in the vertical direction.
The target stay cable with the size reduced in proportion is generally a thin steel wire rope, and the stay cable fixture block 3 provided by the embodiment of the invention can effectively fix the target stay cable. For example, when the target cable is used, the end of the lower section of the target cable penetrates through the vertical through hole 302 in the fixture block body 301 and then is connected with the bottom of the displacement adjusting assembly 2, then the target cable returns to the vertical through hole 302, and then the two adjusting clamps 303 are screwed simultaneously to clamp the target cable. Of course, the locking of the target cable can be released through the reverse rotation adjusting clamp 303, the length of the target cable can be adjusted conveniently, and the zeroing and calibration operation of the tension and displacement measuring assembly 1 is facilitated.
The fixture block body 301 may be a screw, and the middle portion of the fixture block body is provided with a vertical through hole 302, and the adjusting clamp 303 may be a nut adapted to the fixture block body.
Therefore, the cable clamping block 3 with the structure can clamp and fix a thin steel wire rope (target cable) with the diameter smaller than 1mm, and can adjust the length of the thin steel wire rope after the adjusting clamp 303 on one side is loosened, so that the defect that a common U-shaped locking clamp, a brake cable clamp, a double-hole screw wire locking device, a single-hole or 8-shaped aluminum sleeve and the like are not suitable for fixing the thin steel wire rope with the small diameter is overcome.
As an example, the vertical through hole 302 may be a kidney-shaped hole so as to accommodate target cables of different thicknesses.
In the above, the vertical displacement of the target cable is adjusted by rotating the displacement adjusting assembly 2, so as to avoid that the tension and displacement adjusting assembly 2 generates torque along with the rotation of the displacement adjusting assembly 2, thereby affecting the tension and displacement measurement accuracy, in the cable length adjusting device provided by the embodiment of the invention, the displacement adjusting assembly 2 is connected with the tension and displacement measuring assembly 1 through the spherical universal joint.
As an example, as shown in fig. 1, the displacement adjusting assembly 2 includes: an adjusting bolt 201 connected with the ball-shaped universal joint; an adjusting nut 202 screwed with the adjusting bolt 201; and a cable connector 203 connected to the adjusting nut 202, the cable connector 203 being used to suspend the target cable. During application, the adjusting nut 202 is kept in a fixed state by a hand or a wrench and the like, and the adjusting bolt 201 is rotated to achieve the effect of displacement along the vertical direction.
The head of the adjusting bolt 201 may be provided with a spherical limiting groove adapted to the spherical universal joint, so that the spherical universal joint is limited therein without affecting the rotation thereof. One side of the head of the adjusting bolt 201 is further provided with a ball inlet channel communicated with the spherical limiting groove, so that the spherical universal joint can enter the spherical limiting groove.
Spherical universal joint's top and dowel steel 105 fixed connection, the bottom with adjusting bolt 201's head swing joint can, can make adjusting bolt 201 directly link to each other with pulling force and displacement measurement subassembly 1 through it, show the length and the size that reduce this cable length adjustment device, not only simple installation, and make its demand that can satisfy the laboratory experiment model.
The target cable is suspended by the cable link 203, that is, in application, the end of the target cable may be suspended by passing through the cable link 203. In order to ensure that the target cable is always in the vertical direction and the axis is always coincident with the axis of the dowel 105, in the embodiment of the present invention, as shown in fig. 1, the cable connector 203 comprises: two transverse connecting sections respectively connected with the left side and the right side of the adjusting nut 202; and the two ends of the vertical connecting section are simultaneously connected with the two transverse connecting sections, and the vertical connecting section is used for hanging a target inhaul cable. The two transverse connecting sections are consistent in structure and length and are symmetrically arranged on two sides of the adjusting nut 202.
The vertical connecting section at least has a concave hanging part, and the vertical connecting section can be in a V-shaped structure or a semicircular ring structure. Based on the V-shaped structure, the suspension bracket has the advantages of simple structure, convenience in manufacturing, stability in suspension and the like, and in the embodiment of the invention, the vertical connecting section can be in a V-shaped structure. A V-shaped wire rope may be used as the vertical connecting section.
In order to keep the lower segment of the target cable in a vertical state all the time, the transverse connecting segment can be rotatably connected with the adjusting nut 202, that is, the transverse connecting segment can freely rotate 360 degrees around the adjusting nut 202, so that the target cable is kept vertical all the time under the action of gravity.
In an embodiment of the present invention, the tension and displacement measuring assembly 1 includes: a body 101; a tension scale 102 and a displacement scale 103 which are correspondingly arranged at the left side and the right side of the body 101; a spring 104 suspended from the upper portion of the body 101; a dowel bar 105 connected to the lower end of the spring 104; a transverse pointer 106 arranged at the upper end of the dowel bar 105, wherein two ends of the transverse pointer 106 are respectively used for indicating the tension scale 102 and the displacement scale 103; a rotary pointer 107 is arranged at the lower end of the dowel bar 105, and the rotary pointer 107 is used for indicating an annular scale 108 on the top of the displacement adjusting assembly 2.
As shown in fig. 2, a slot may be formed in the body 101, the slot being sequentially connected from top to bottom to accommodate the dowel bar 105, and the middle of the transverse pointer 106 is connected to the upper end of the dowel bar 105 and located outside the slot.
The tension scale 102 is used for measuring tension applied to the upper section of the target cable, and the displacement scale 103 is used for measuring vertical displacement of the spring 104 after the target cable is correspondingly stressed.
In order to improve the measurement accuracy of the tension scale 102 and the displacement scale 103, the tension scale 102 may include: main tension scale and tension vernier scale, displacement scale 103 can include: a displacement main scale and a displacement vernier.
In order to facilitate the connection of the adjusting device and the upper section of the target cable, a hanging hole 109 can be formed in the top of the body 101, and after the upper section of the target cable passes through the hanging hole 109, the cable clamping block 3 is used for fixing.
The pull scale 102 and the displacement scale 103 can be manufactured by a spring 104 tensiometer and a vernier caliper which are conventional in the art, for example, a spring 104 tensiometer with a measuring range of 50N and a division value of 1N and a vernier caliper with a length of 20cm and a division value of 0.02 mm.
When manufacturing the tension and displacement measuring assembly 1, a displacement main scale and a tension main scale are respectively arranged on the left side and the right side of the body 101, and scale marks are arranged on the surfaces of the corresponding sides of the transverse pointer 106. For example, can set up pulling force main scale and pulling force vernier scale on the right side of body 101, the body 101 left side sets up displacement main scale and displacement vernier scale, and wherein, the zero scale mark of two above vernier scales aligns with the zero scale mark of the main scale that corresponds.
For the identification of the graduation marks on the tension scale 102 and the displacement scale 103, the following methods can be seen: for the pull-force scale 102, if the range of a certain segment on the pull-force main scale is F1N, the division value is F2N, and the segment has N equal division lines in total (e.g., the range of a certain segment on the pull-force main scale is 10N, the division value is 1N, and 10 equal division lines in total), the range Y1 of the corresponding vernier is equal to F1-F2N, and at this time, the same N equal division lines are taken, and the division value is Y2 equal to F2/N (e.g., the range of the pull-force vernier is 9N, and the division value is 0.1N if 10 equal division lines exist); similarly, for the displacement scale 103 on the other side, scale marking can be performed using the same method.
When the tension and displacement are measured, the reading method of the tension and displacement data is the same as that of the traditional spring 104 tension meter and vernier caliper, for example, if the 0 scale mark of the vernier caliper is just aligned with a certain scale mark of the main scale, the corresponding scale mark value is the value of the tension or displacement; if the 0 scale mark of the vernier is located between the two scale marks of the main scale, reading the numerical value a of the previous scale mark on the main scale, and comprehensively calculating to obtain the measured value of a + mxy 2 according to the scale mark (such as the mth grid) on the vernier which is most closely aligned with a certain scale mark of the main scale, thereby obtaining the measured tension or displacement.
For the annular scale 108, for example, at the top of the displacement adjusting assembly 2, for example, at the position where the head surface of the adjusting bolt 201 is close to the boundary, as shown in fig. 4, the graduation lines are divided, and N bisectors (for example, 36 bisectors) are totally divided, since the thread pitch of the adjusting bolt 201 is a fixed value L, the forward displacement can be obtained by calculating the number of turns of the adjusting bolt 201 when the adjusting bolt 201 rotates, and if the adjusting bolt 201 rotates exactly r turns, the axial displacement is r × L; when there is less than one rotation (e.g., r rotations + m/N rotations), the advance displacement J of the adjusting bolt 201 is (r + m/N) × L. It can be seen that the displacement adjusting assembly 2 not only can adjust the length, but also can assist in accurately calculating the precession displacement.
For the rotating pointer 107, it may include: an inclined section (downward inclination) connected with the lower end of dowel bar 105, and a horizontal section connected with the inclined section, wherein the horizontal section is used for indicating annular scale 108.
In summary, compared with the conventional spring 104, the tension and displacement measuring assembly 1 provided by the embodiment of the invention can only roughly display the tension, and can simultaneously and accurately display the tension measured value, the deformation displacement of the spring 104 and the displacement of the displacement adjusting assembly 2, thereby finally realizing the measurement of the internal force of the target cable and the adjustment of the length of the target cable. Therefore, the adjusting device provided by the invention is suitable for length adjustment of the stay cable and measurement of the tension in the experimental process when a natural gas or crude oil pipeline suspension cable crossing structure experiment is carried out.
For the adjusting device provided by the embodiment of the invention, in one example, the spring 104, the dowel bar 105, the spherical universal joint and the adjusting bolt 201 are sequentially connected from top to bottom, so that parts such as a hook are omitted, and the length of the whole device is shortened.
As an example, an embodiment of the present invention provides a cable length adjusting device including: the device comprises a tension and displacement measuring component 1, a displacement adjusting component 2 and a pull cable clamping block 3.
Wherein, pulling force and displacement measurement subassembly 1 includes: a body 101; a tension scale 102 and a displacement scale 103 which are correspondingly arranged at the left side and the right side of the body 101; a spring 104 suspended from the upper portion of the body 101; a dowel bar 105 connected to the lower end of the spring 104; a transverse pointer 106 arranged at the upper end of the dowel bar 105, wherein two ends of the transverse pointer 106 are respectively used for indicating the tension scale 102 and the displacement scale 103; a rotary pointer 107 is provided at the lower end of the dowel bar 105, and the rotary pointer 107 is used for indicating an annular scale 108 on the top of the displacement regulating assembly 2.
The displacement regulating assembly 2 includes: an adjusting bolt 201 connected with a spherical universal joint, wherein the upper end of the spherical universal joint is connected with the dowel bar 105; an adjusting nut 202 screwed with the adjusting bolt 201; and a cable connector 203 connected to the adjusting nut 202, the cable connector 203 being used to suspend the target cable. The cable link 203 includes: two transverse connecting sections respectively connected with the left side and the right side of the adjusting nut 202; and the two ends of the vertical connecting section are simultaneously connected with the two transverse connecting sections, and the vertical connecting section is used for hanging a target inhaul cable.
The cable fixture block 3 includes: the cable clamping device comprises a clamping block body 301 with a vertical through hole 302 and two adjusting clamps 303 which are respectively in threaded connection with parts, located on two sides of the vertical through hole 302, of the clamping block body 301, wherein the vertical through hole 302 is used for enabling a cable to pass through.
Based on the adjusting device described in this example, the following is briefly described with respect to its application:
the first step, return to zero and the calibration to pulling force and displacement measurement subassembly 1, make the zero scale mark of displacement vernier scale, pulling force vernier scale align with the zero scale mark of displacement main scale, pulling force main scale respectively.
Secondly, the thin steel wire rope (namely, the lower section of the target cable) passes through the vertical through hole 302 in the fixture block body 301, then bypasses the vertical connecting section of the V-shaped structure on the adjusting nut 202, then returns to pass through the vertical through hole 302, and then is fixed by screwing the adjusting clamps 303 on the two sides; in the same way, the upper end of the target cable is connected and fixed with the cable clamping block 3 through the hanging hole 109 on the upper part of the body 101.
And thirdly, adjusting the length of the target cable by loosening and tightening the adjusting clamp 303 of the cable clamping block 3, so that the target cable and the whole device are in a vertical state, and simultaneously, the zero scale lines of the two vernier scales are aligned with the zero scale line of the corresponding main scale. At the same time, rotating pointer 107 is adjusted to indicate the start point of annular scale 108.
Fourthly, slowly rotating the adjusting bolt 201, controlling the transverse pointer 106 to move at the same time, and recording the number of rotating circles, wherein the length of less than one circle is calculated through the graduation mark indicated by the rotating pointer 107; meanwhile, the magnitude of the tension indicated by the zero scale line of the tension vernier is observed, and when the design required value is reached (i.e., the target cable reaches the corresponding stress), the adjusting bolt 201 is stopped being screwed in.
In the fifth step, the displacement value indicated by the displacement scale 103 due to the deformation of the spring 104 is directly read.
Therefore, the adjusting device provided by the embodiment of the invention has the advantages of simple structure, easiness in preparation, convenience in operation and high accuracy of measuring results, and is suitable for length adjustment and high-accuracy measurement of the sling, the wind cable stay cable and the conjugate stay cable in the pipeline suspension cable crossing structure experiment model.
The length of a main span of a suspended cable spanning structure of a certain natural gas pipeline is 360m, the vector span ratio of a main cable is 1/10, 72 main cable inhaul cables are arranged on one side of the suspended cable spanning structure, the length of the inhaul cable at the position of 1/2 span is 2.604m, the diameter of the section of the inhaul cable is 18mm, and the magnitude of internal force obtained by field detection in a bridge forming state is 20 kN. The indoor experiment platform is built on the whole span structure by adopting a reduced scale of 1/20, and the length of a main cable guy cable at the position 1/2 of the span is 13.02cm, the diameter of the cross section of the guy cable is 0.9mm, and the size of the received internal force is 50N after calculation according to the similarity criterion. Based on the above, the device provided by the invention is adopted for adjustment so as to meet the requirements of design calculation. The method comprises the following steps:
(1) the scale of the tension and displacement measuring component 1 is arranged: for the right pull force main scale, the measuring range is 100N, the division value is 2N, 50 equal division scale lines are provided in total, the measuring range of the corresponding pull force vernier scale is 38N, 20 equal division scale lines are provided in total, and the division value is 0.1N. For the left displacement main scale, the measuring range is 50mm, the division value is 1mm, 20 equally-divided scale lines are arranged, and the measuring range of the corresponding displacement vernier scale is 19mm, and the division value is 0.05 mm. Wherein, the 0 scale mark of left and right main scale is parallel and level, and the 0 scale mark of left and right vernier scale is parallel and level.
(2) The length of the adjusting bolt 201 is selected and is arranged with the scale of the annular scale 108: the length of the thread pitch of the adjusting bolt 201 is set to 1mm, the head is divided by 20 equally-divided graduation lines, and the advancing distance of the thread represented by one rotation is 0.05 mm.
(3) Calibration and zeroing: calibrating and zeroing the tension and displacement measuring assembly 1 to enable the 0 scale lines of the vernier scale to be respectively aligned with the 0 scale lines of the main scale; at the same time, the rotating pointer 107 is adjusted so that its top is at the starting point.
(4) Installation of the adjusting device: a thin steel wire rope (namely, the lower section of a target inhaul cable) passes through the vertical through hole 302 in the fixture block body 301, then bypasses the vertical connecting section of the V-shaped structure on the adjusting nut 202, then returns to pass through the vertical through hole 302, and then is fixed by screwing the adjusting clamps 303 on the two sides; in the same way, the upper end of the target cable is connected and fixed with the cable clamping block 3 through the hanging hole 109 on the upper part of the body 101. The length of the target cable is adjusted through the adjusting clamp 303 of the cable clamping block 3 to be loose and tight, so that the target cable and the whole device are in a vertical state, and meanwhile, the zero scale lines of the two vernier scales are aligned with the zero scale line of the corresponding main scale. At the same time, the rotary pointer 107 is adjusted to indicate the start point of the annular scale 108. The overall length L0 of the target cable at this time is recorded.
(5) Test procedures and results: the moving distance of the transverse pointer 106 is controlled by slowly rotating the adjusting bolt 201, an integral number r of turns of the adjusting bolt 201 is recorded, and the length of less than one turn is calculated by the interval number m of the equal division scale lines indicated by the rotating pointer 107; meanwhile, observing the pulling force indicated by the zero scale line of the pulling force vernier, when the pulling force of the target cable reaches 50N, stopping screwing in the adjusting bolt 201, reading the displacement value L1 indicated by the displacement scale 103 at this time, and then shortening the displacement size L2 of the target cable is (r × 1+ m × 0.05) -L1, and further obtaining the length of the target cable at this time as: L3-L0-L2, which achieves the purpose of fine adjustment of its length.
The above description is only for facilitating the understanding of the technical solutions of the present invention by those skilled in the art, and is not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A cable length adjusting device for a laboratory test model of a catenary span structure, the device being used for adjusting tension and displacement of a target cable whose size is scaled down, the device comprising: the device comprises a tension and displacement measuring assembly, a displacement adjusting assembly and a stay cable clamping block;
the tension and displacement measuring assembly comprises: a body;
the pull force scale and the displacement scale are correspondingly arranged on the left side and the right side of the body;
a spring suspended from an upper portion of the body;
a dowel bar connected with the lower end of the spring;
the transverse pointer is arranged at the upper end of the dowel bar, and two ends of the transverse pointer are respectively used for indicating the tension scale and the displacement scale;
the rotating pointer is arranged at the lower end of the dowel bar and used for indicating the annular scale at the top of the displacement adjusting assembly;
the displacement adjusting assembly is connected with the lower end of the dowel bar through a spherical universal joint and is rotated to adjust the displacement of the target inhaul cable in the vertical direction;
the displacement adjustment assembly includes: the adjusting bolt is connected with the spherical universal joint;
the adjusting nut is in threaded connection with the adjusting bolt;
the inhaul cable connecting piece is connected with the adjusting nut and used for hanging the target inhaul cable;
the cable fixture block includes: the cable pulling fixture comprises a fixture block body with a vertical through hole and two adjusting clamps which are respectively in threaded connection with parts of the fixture block body, which are positioned on two sides of the vertical through hole, wherein the vertical through hole is used for a target cable to pass through;
the target inhaul cable is divided into two sections, including an upper section and a lower section, and a hanging hole is formed in the top of the body;
the lower section of the target cable is fixed and suspended at the bottom of the displacement adjusting assembly through the cable clamping block, and the target cable comprises: after the end part of the lower section of the target inhaul cable penetrates through the vertical through hole in the fixture block body, the end part of the lower section of the target inhaul cable is connected with the bottom of the displacement adjusting assembly and returns to the vertical through hole, and the lower section of the target inhaul cable is tightly clamped by the two adjusting clamps by screwing the two adjusting clamps;
the upper segment of target cable passes through the cable fixture block is fixed and is connected the top of pulling force and displacement measurement subassembly, this includes: and after the upper section of the target inhaul cable passes through the hanging hole in the top of the body, the inhaul cable clamping block is used for fixing.
2. The guy cable length adjusting device for the indoor test model of the suspension cable crossing structure as claimed in claim 1, wherein the vertical through hole is in a kidney-shaped hole shape.
3. A cable length adjustment device for a catenary crossover structural laboratory model according to claim 1, wherein the cable connector comprises: the two transverse connecting sections are respectively connected with the left side and the right side of the adjusting nut;
and the two ends of the vertical connecting section are simultaneously connected with the two transverse connecting sections, and the vertical connecting section is used for hanging the target inhaul cable.
4. A guy cable length adjustment device for indoor test models of suspension cable crossing structures according to claim 3, characterized in that the vertical connecting section is of a V-shaped structure.
5. A cable length adjustment device for a laboratory test model of a catenary span structure according to claim 3, wherein the transverse connection section is rotatably connected to the adjustment nut.
6. A guy cable length adjustment device for a laboratory test model of a catenary span structure according to claim 1, wherein the guy scale comprises: a main tension scale and a vernier tension scale.
7. A guy cable length adjustment device for a laboratory test model of a catenary span structure according to claim 1, wherein the displacement scale comprises: a displacement main scale and a displacement vernier.
8. The inhaul cable length adjusting device for the indoor test model of the suspension cable crossing structure as claimed in claim 1, wherein a hanging hole is formed in the top of the body.
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| CN201911365850.0A CN113049164B (en) | 2019-12-26 | 2019-12-26 | Inhaul cable length adjusting device for indoor test model of suspension cable crossing structure |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276426A (en) * | 1926-05-26 | 1927-08-26 | Cussons Ltd G | Improvements in appliances for indicating tension and compression stresses |
| US4549353A (en) * | 1982-07-28 | 1985-10-29 | Mitutoyo Mfg. Co., Ltd. | Displacement measuring instrument |
| CN101576444A (en) * | 2009-06-26 | 2009-11-11 | 清华大学 | Spatial structure integral model test cable force self-balanced loading control method |
| KR100969005B1 (en) * | 2009-11-06 | 2010-07-09 | 동아대학교 산학협력단 | Constructing method of suspension bridge and temporary cable therefor |
| CN201535651U (en) * | 2009-09-30 | 2010-07-28 | 中国科学院武汉岩土力学研究所 | Calibration device of guy rope type displacement meter |
| CN202814382U (en) * | 2012-08-28 | 2013-03-20 | 中交二公局第五工程有限公司 | Adjustable type main cable strand sag measurement tool |
| CN204128526U (en) * | 2014-09-26 | 2015-01-28 | 上海城建市政工程（集团）有限公司 | Be positioned at the displacement transducer mounting structure hung on mould suspension cable |
| CN104776780A (en) * | 2015-04-02 | 2015-07-15 | 力帆实业(集团)股份有限公司 | Device for measuring and detecting gear shift cable of automobile |
| CN105633577A (en) * | 2016-01-25 | 2016-06-01 | 西安电子科技大学 | Boundary cable position micro-adjustment and cable force measurement device and method for thin-film reflecting surface |
| CN109100071A (en) * | 2018-08-24 | 2018-12-28 | 华中科技大学 | Parallel wire stay cable force detecting device |
| CN109489968A (en) * | 2019-01-11 | 2019-03-19 | 杭叉集团股份有限公司 | Operate drag-line detection device |
-
2019
- 2019-12-26 CN CN201911365850.0A patent/CN113049164B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB276426A (en) * | 1926-05-26 | 1927-08-26 | Cussons Ltd G | Improvements in appliances for indicating tension and compression stresses |
| US4549353A (en) * | 1982-07-28 | 1985-10-29 | Mitutoyo Mfg. Co., Ltd. | Displacement measuring instrument |
| CN101576444A (en) * | 2009-06-26 | 2009-11-11 | 清华大学 | Spatial structure integral model test cable force self-balanced loading control method |
| CN201535651U (en) * | 2009-09-30 | 2010-07-28 | 中国科学院武汉岩土力学研究所 | Calibration device of guy rope type displacement meter |
| KR100969005B1 (en) * | 2009-11-06 | 2010-07-09 | 동아대학교 산학협력단 | Constructing method of suspension bridge and temporary cable therefor |
| CN202814382U (en) * | 2012-08-28 | 2013-03-20 | 中交二公局第五工程有限公司 | Adjustable type main cable strand sag measurement tool |
| CN204128526U (en) * | 2014-09-26 | 2015-01-28 | 上海城建市政工程（集团）有限公司 | Be positioned at the displacement transducer mounting structure hung on mould suspension cable |
| CN104776780A (en) * | 2015-04-02 | 2015-07-15 | 力帆实业(集团)股份有限公司 | Device for measuring and detecting gear shift cable of automobile |
| CN105633577A (en) * | 2016-01-25 | 2016-06-01 | 西安电子科技大学 | Boundary cable position micro-adjustment and cable force measurement device and method for thin-film reflecting surface |
| CN109100071A (en) * | 2018-08-24 | 2018-12-28 | 华中科技大学 | Parallel wire stay cable force detecting device |
| CN109489968A (en) * | 2019-01-11 | 2019-03-19 | 杭叉集团股份有限公司 | Operate drag-line detection device |
Non-Patent Citations (4)
| Title |
|---|
| 利用索力对管道悬索跨越结构的健康检测;王金国;《大庆石油学院学报》;20050430;第20卷(第02期);第95-97页 * |
| 多跨斜拉-自锚式悬索组合体系桥全桥静力模型试验;赵煜等;《长安大学学报(自然科学版)》;20120930;第32卷(第05期);第45-64页 * |
| 模拟损伤状态下长输管道悬索跨越结构抗震性能的试验研究;王金国等;《地震工程与工程振动》;20060831;第26卷(第04期);第192-198页 * |
| 长输管道悬索跨越结构抗震性能的试验研究;王金国等;《地震工程与工程振动》;20090228;第29卷(第02期);第124-130页 * |
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