CN113884233A - Pipeline suspension cable crossing structure model main cable stress adjusting device - Google Patents
Pipeline suspension cable crossing structure model main cable stress adjusting device Download PDFInfo
- Publication number
- CN113884233A CN113884233A CN202010622098.XA CN202010622098A CN113884233A CN 113884233 A CN113884233 A CN 113884233A CN 202010622098 A CN202010622098 A CN 202010622098A CN 113884233 A CN113884233 A CN 113884233A
- Authority
- CN
- China
- Prior art keywords
- scale
- stress
- main
- tension
- clamping section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 238000011065 in-situ storage Methods 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000009440 infrastructure construction Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
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
- 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
- G01L5/06—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 using mechanical means
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
Abstract
The invention discloses a stress adjusting device for a main cable of a pipeline suspension cable crossing structure model, and belongs to the field of infrastructure construction. In the device, a tension main scale and a stress main scale are symmetrically positioned at the left side and the right side of a measuring body, and the scales of the tension main scale and the stress main scale are in one-to-one correspondence; the spring is suspended at the upper part of the measuring body; the vernier scale is connected with the lower end of the spring, and vernier scales matched with the tension main scale and the stress main scale are arranged on the left side and the right side of the vernier scale respectively; the upper end of the dowel bar is vertically connected with the lower end of the vernier; the movable sliding rod is connected with the lower end of the dowel bar, and the wall of the movable sliding rod is provided with transmission teeth along the vertical direction; the adjusting screw rod is meshed with the transmission gear to drive the movable sliding rod to move along the vertical direction; the shell accommodates the adjusting screw and the movable sliding rod and enables the adjusting screw to rotate in situ; the upper hanging ring is fixed at the top of the measuring body, and the lower hanging ring is fixed at the bottom of the shell. The device can adjust and measure the stress of pipeline span structure scale model main cable to the size is less, satisfies the demand of miniature model for the experiment.
Description
Technical Field
The invention relates to the field of capital construction, in particular to a stress adjusting device for a main cable of a pipeline suspension cable crossing structure model.
Background
The oil and gas pipeline span structure is commonly used for spanning special sections such as continuous undulating terrain with large vertical fall distance, rivers with large width, canyons with large depth and the like. During the design, construction and operation processes, the stress state of the pipeline span structure is generally required to be analyzed so as to ensure the safety and stability of the pipeline span structure. In order to study the stress change condition inside each cable system when the pipeline suspension cable crossing structure is influenced by wind load, earthquake load, pigging dynamic load and the like in a bridge state, an indoor experimental model (namely, a pipeline suspension cable crossing structure model) with a reduced proportion needs to be built for analysis. For the main cable of the pipeline suspension cable crossing structure, after the main cable is reduced according to a certain proportion, the length and the diameter of the main cable are greatly reduced, and the situation that the tensile stress of the main cable is not convenient to adjust accurately due to the fact that the size of the main cable is too small can occur.
The correlation technique provides a model test is with suspension cable anchor and cable force testing arrangement, includes: the cable-stayed device comprises a stay cable, an adjusting joint is arranged on the stay cable, a cable adjusting screw rod is arranged on the upper surface and the lower surface of the adjusting joint in a penetrating way, a cable guide pipe communicated with the inside of the adjusting joint is arranged on the side surface of the adjusting joint, and one end of the stay cable penetrates through the cable guide pipe to extend into the adjusting joint and is fixed on the cable adjusting screw rod; the adjusting joint is connected with a tension sensor.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
the device provided by the related art is used for tension test of the stay cable and cannot be directly applied to stress adjustment of the main cable of the pipeline suspension cable crossing structure model.
Disclosure of Invention
In view of this, the invention provides a stress adjustment device for a main cable of a pipeline span structure model, which can accurately adjust the stress of the main cable of the pipeline span structure model.
Specifically, the method comprises the following technical scheme:
a pipeline catenary crossover structural model main cable stress adjustment apparatus, comprising: the tension and stress measuring assembly, the length adjusting assembly, the upper hanging ring and the lower hanging ring are arranged on the upper hanging ring;
the tension and stress measuring assembly comprises: the measuring device comprises a measuring body, a tension main scale, a stress main scale, a spring, a vernier and a dowel bar;
the tension main scale and the stress main scale are symmetrically positioned on the left side and the right side of the measuring body, and the scales of the stress main scale correspond to the scales of the tension main scale one by one;
the spring is suspended at the upper part of the measuring body;
the vernier scale is connected with the lower end of the spring, and the left side and the right side of the vernier scale are provided with a tension vernier scale and a stress vernier scale which are respectively matched with the tension main scale and the stress main scale;
the upper end of the dowel bar is vertically connected with the lower end of the vernier;
the length adjustment assembly includes: the sliding rod, the adjusting screw and the shell are moved;
the movable sliding rod is connected with the lower end of the dowel bar, and transmission teeth are arranged on the wall of the movable sliding rod along the vertical direction;
the adjusting screw is configured to be meshed with the transmission gear and drives the moving slide rod to move in the vertical direction through rotation;
the shell is configured to accommodate the adjusting screw rod and the moving slide rod and enable the adjusting screw rod to rotate in situ;
the upper hanging ring is fixed at the top of the measuring body, and the lower hanging ring is fixed at the bottom of the shell.
In one possible implementation, the measurement apparatus further includes: the righting piece is fixed on the measuring body, and is matched with the measuring body to form a righting cavity;
the dowel bar penetrates through the righting cavity.
In one possible implementation, the centering member includes: the device comprises an arc-shaped righting sleeve and two fixing plates connected with two ends of the arc-shaped righting sleeve;
the two fixing plates are fixed on the measuring body through screws;
the circular arc-shaped righting sleeve is matched with the measuring body to form the righting cavity.
In a possible implementation manner, a first scale clamping piece is arranged on the measuring body at a position corresponding to the main tension scale;
the tension main scale is clamped with the first scale clamping piece.
In one possible implementation, the first scale escapement comprises: the card comprises a first vertical card section, a first horizontal card section and a second vertical card section;
the first vertical clamping section is provided with a first vertical clamping cavity, and the lower end of the first vertical clamping section is vertically connected with one end of the first horizontal clamping section;
the first horizontal clamping section is provided with a first horizontal clamping cavity, and the other end of the first horizontal clamping section is vertically connected with the lower end of the second vertical clamping section;
the second vertical clamping section is provided with a second vertical clamping cavity, and the upper end of the second vertical clamping section is located below the lowest scale mark of the main tension scale.
In a possible implementation manner, a second scale clamping piece is arranged on the measuring body at a position corresponding to the stress main scale;
and the stress main scale is clamped with the second scale clamping piece.
In one possible implementation, the second scale catch comprises: a third vertical clamping section, a second horizontal clamping section and a fourth vertical clamping section;
the third vertical clamping section is provided with a third vertical clamping cavity, and the lower end of the third vertical clamping section is vertically connected with one end of the second horizontal clamping section;
the second horizontal clamping section is provided with a second horizontal clamping cavity, and the other end of the second horizontal clamping section is vertically connected with the lower end of the fourth vertical clamping section;
the fourth vertical clamping section is provided with a fourth vertical clamping cavity, and the upper end of the fourth vertical clamping section is positioned below the lowest scale mark of the stress main scale.
In a possible implementation manner, the measuring body is provided with guide grooves which are sequentially communicated from top to bottom;
the surface of the vernier facing the measuring body is connected with a connecting piece;
the connecting piece is accommodated in the guide groove and can move up and down along the guide groove.
In a possible implementation manner, the shell is internally provided with a first accommodating cavity, the top of the shell is provided with a first through hole, and the first through hole is communicated with the top of the first accommodating cavity;
the movable sliding rod penetrates through the first through hole and is seated in the first accommodating cavity.
In one possible implementation manner, the housing has a second accommodating cavity inside, and a side portion of the second accommodating cavity is communicated with a side portion of the first accommodating cavity;
the bottom of the shell is provided with a second through hole which is communicated with the bottom of the second accommodating cavity;
the adjusting screw includes: the operating head is connected with the bottom of the rod body;
the rod body penetrates through the second through hole, is limited in the second containing cavity and is meshed with the transmission gear;
the operating head is located outside the housing.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the stress adjusting device for the main cable of the pipeline span structure model provided by the embodiment of the invention can adjust and measure the stress of the main cable with the size reduced in proportion in the pipeline span structure model. When the stress adjusting device is applied, the main cable is divided into two sections, the upper section is connected with the upper hanging ring, and the lower section is connected with the lower hanging ring, so that the stress adjusting device is stably connected with the main cable. The tension and stress measuring assembly is reset and calibrated, and specifically, the tension vernier scales on the left side and the right side of the vernier scale and the zero scale lines of the tension vernier scales are respectively aligned with the zero scale lines of the tension main scale and the stress main scale. The adjusting screw rod is rotated, so that the main cable is integrally just in a tensioning state, then the adjusting screw rod is continuously and slowly rotated to drive the movable sliding rod to move up and down, and then the vernier is driven by the dowel bar to move up and down (the vernier which moves up and down can adjust, for example, stretch the upper section of the main cable), and the indication scale of the vernier on the stress main scale is continuously observed in the process so as to judge whether the stress of the main cable reaches a preset value. When the stress of the main cable reaches a preset value, the adjusting screw stops rotating, and the stress of the main cable can be accurately adjusted.
Therefore, the stress adjusting device for the main cable of the pipeline suspension cable crossing structure model, provided by the embodiment of the invention, can realize the adjustment and measurement of the stress of the main cable of the pipeline suspension cable crossing structure scale model through the matching of the tension and stress measuring component and the length adjusting component, and can be set to be smaller in size, so that the requirement of a small model for experiments can be met.
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 an exemplary pipeline catenary crossover structural model main cable strain relief device provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a section A-A of FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an exemplary centralizer provided in accordance with embodiments of the present invention;
fig. 4 is a schematic structural diagram of a section B-B of fig. 1 according to an embodiment of the present invention.
The reference numerals denote:
1-a tension and stress measuring assembly,
101-the body of the measurement is,
102-a main scale of the pulling force,
103-a main scale of the stress-a,
104-a spring-loaded spring,
105-a vernier scale which is provided with a vernier scale,
106-a force-transmitting rod, is provided,
107-a connecting piece, the connecting piece,
2-a length-adjusting component, wherein,
201-moving the slide bar,
202-adjusting the screw rod of the screw rod,
2021-a rod body, which is provided with a rod body,
2022-adjusting the position of the head of the patient,
203-a housing, the housing being,
3-hanging the ring on the upper part of the hanging ring,
4-hanging the ring at the lower part,
5-a righting part is arranged on the frame,
501-a fixed plate is arranged on the upper surface of the frame,
502-a centering sleeve for centering the workpiece,
6-the first scale clamping piece is provided with a first scale clamping piece,
7-a second scale clamping piece,
8-screw.
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 stress adjusting device for a main cable of a pipeline span structure model, as shown in the attached figure 1, the stress adjusting device for the main cable of the pipeline span structure model comprises: the tension and stress measuring device comprises a tension and stress measuring component 1, a length adjusting component 2, an upper hanging ring 3 and a lower hanging ring 4.
Wherein, tensile force and stress measurement subassembly 1 includes: the measuring device comprises a measuring body 101, a main tension scale 102, a main stress scale 103, a spring 104, a vernier 105 and a dowel bar 106.
The main tension scale 102 and the main stress scale 103 are symmetrically positioned at the left side and the right side of the measuring body 101, and the scales of the main stress scale 103 correspond to the scales of the main tension scale 102 one by one;
the spring 104 is suspended on the upper part of the measuring body 101;
the vernier caliper 105 is connected with the lower end of the spring 104, and the left side and the right side of the vernier caliper 105 are provided with a tension vernier scale and a stress vernier scale which are respectively matched with the tension main scale 102 and the stress main scale 103;
the upper end of the dowel bar 106 is vertically connected with the lower end of the vernier 105;
the length adjustment assembly 2 includes: a movable sliding rod 201, an adjusting screw 202 and a shell 203;
the movable sliding rod 201 is connected with the lower end of the dowel bar 106, and the wall of the movable sliding rod 201 is provided with transmission teeth along the vertical direction;
referring to fig. 4, the adjusting screw 202 is configured to engage with the driving gear and move the moving slide 201 in the vertical direction by the rotational driving;
the housing 203 is configured to accommodate the adjusting screw 202 and the moving slide 201, and to rotate the adjusting screw 202 in situ;
the upper suspension loop 3 is fixed on the top of the measuring body 101, and the lower suspension loop 4 is fixed on the bottom of the shell 203.
The stress adjusting device for the main cable of the pipeline span structure model provided by the embodiment of the invention can adjust and measure the stress of the main cable with the size reduced in proportion in the pipeline span structure model. When the stress adjusting device is applied, the main cable is divided into two sections, the upper section is connected with the upper hanging ring 3, and the lower section is connected with the lower hanging ring 4, so that the stress adjusting device is stably connected with the main cable.
The tension and stress measuring assembly 1 is reset and calibrated, and specifically, the zero scale lines of the tension vernier scale and the stress vernier scale on the left side and the right side of the vernier scale 105 are respectively aligned with the zero scale lines of the tension main scale 102 and the stress main scale 103.
The adjusting screw 202 is rotated to enable the main cable to be in a tensioned state as a whole, then the adjusting screw 202 is continuously and slowly rotated to drive the movable sliding rod 201 to move up and down, and further the force transmission rod 106 drives the vernier 105 to move up and down (the vernier 105 moving up and down can adjust, for example stretch, the upper section of the main cable), and in the process, the indication scale of the vernier 105 on the stress main scale 103 is continuously observed to judge whether the stress of the main cable reaches a preset value. When the stress of the main cable reaches a preset value, the rotation of the adjusting screw 202 is stopped, and at the moment, the accurate adjustment of the stress of the main cable can be realized.
Therefore, the stress adjusting device for the main cable of the pipeline suspension cable crossing structure model, provided by the embodiment of the invention, can realize the adjustment and measurement of the stress of the main cable of the pipeline suspension cable crossing structure scale model through the matching of the tension and stress measuring component 1 and the length adjusting component 2, and can be set to be smaller in size, so that the requirement of a small model for experiments can be met.
It is understood that the tension and stress measuring assembly 1 in the embodiment of the present invention is substantially an improved spring 104 tension meter, which is improved in that: a stress main scale 103 is arranged on a traditional spring 104 tension meter, wherein the scales of the stress main scale 103 and the scales of the tension main scale 102 have one-to-one correspondence. In a certain state, for a certain main cable, the stress value is the tensile value ÷ diameter of the main cable. That is, the scale of the stress main scale 103 is equal to the scale of the corresponding tension main scale 102 ÷ the diameter of the main rope.
The tension and stress measuring assembly 1 provided by the embodiment of the invention overcomes the problems that a common stress-strain measuring instrument can only display data and cannot adjust the stress, and the defects that the traditional spring 104 tension meter cannot display the stress and cannot adjust the length of a main cable in real time. This pulling force and stress measurement subassembly 1 can the integral type structure, and simple structure and whole length are shorter, and installation and convenient to use are applicable to the regulation and the measurement of the inside pulling force of main cable and stress in the indoor scale model experiment of natural gas or crude oil pipeline span structure.
The following briefly describes the preparation process of the tension and stress measuring assembly 1 provided by the embodiment of the present invention:
the tension and stress measuring assembly 1 is fabricated in a manner similar to the fabrication of conventional spring 104 tensiometers and vernier calipers. For example, a tension and stress measuring assembly 1 with a 50N pull span and a 1N division value and a vernier scale 105 with a length of 20cm and a division value of 0.02mm are prepared below.
The left side and the right side of the measuring body 101 are respectively provided with a detachable tension main scale 102 and a detachable tension main scale 103, and the corresponding side surface of the vernier 105 is provided with vernier scale marks. Thus, one side of the measuring body 101 forms the tension main scale 102 and the tension vernier scale 105, and the other side of the measuring body 101 forms the stress main scale 103 and the stress vernier scale 105. During application, the tension and stress measuring assembly 1 is zeroed and calibrated so that the zero scale line of the vernier 105 is aligned with the zero scale line of the corresponding main scale.
For the drawing of the graduation marks on the main tension scale 102 and the main tension scale 103, for example, if the range of a certain segment on the main tension scale 102 is L and the division value is F, the segment has N equal division graduation lines (e.g., the range of a certain segment on the main tension scale 102 is 10N, the division value is 1N, and the total of 10 equal division graduation lines), then the range Y of the vernier 105 corresponding to the main tension scale 102 is L-F, and at this time, the same N equal division graduation lines are taken, and the division value is F1 is F/N (e.g., the range Y of the vernier 105 is 10-1 or 9N, and the division value is 0.1N if the number of 10 equal division graduation lines is provided). Similarly, for the design of the stress main scale 103, the same method is used for scale marking.
For reading the scale marks on the main tension scale 102 and the main tension scale 103, the reading method is the same as that of a traditional spring 104 tension meter and a traditional vernier caliper: if the zero scale mark of the middle vernier 105 is exactly aligned with a certain scale mark of the main vernier, the numerical value marked on the corresponding scale mark is the tensile force value or the stress value; if the zero scale mark of the vernier 105 is located between the two scale marks of the main scale, the numerical value j of the previous scale mark is read, and then the measured value of the vernier 105 is calculated to be j + kxf 1 according to the scale mark (for example, the kth lattice) on the vernier 105 which is most closely aligned with a certain scale mark of the main scale, so that the measured tension value or the measured stress value is obtained.
In a possible implementation manner, as shown in fig. 1, the stress adjustment device for a main cable of a pipeline catenary-spanning structural model according to an embodiment of the present invention further includes: the device comprises a righting piece 5, a measuring body 101 and a measuring body, wherein the righting piece 5 is fixed on the measuring body 101, and the righting piece 5 is matched with the measuring body 101 to form a righting cavity; dowel bar 106 extends through the righting chamber.
The dowel bar 106 is centered by using the centering bar, so that the dowel bar 106 is always kept in a vertical state, and the accuracy in stress adjustment and measurement is further ensured.
The size of this cavity of righting and dowel bar 106's size looks adaptation can realize effectively righting to dowel bar 106 under the prerequisite that does not influence dowel bar 106 up-and-down motion.
As an example, as shown in fig. 3, the centering member 5 includes: the arc-shaped centering sleeve 502 and two fixing plates 501 connected with two ends of the arc-shaped centering sleeve 502; two fixing plates 501 are fixed to the measuring body 101 by screws 8.
The righting member 5 is fixed on the measuring body 101 through the fixing plate 501, so that a righting cavity which is through up and down can be formed between the circular arc righting sleeve 502 and the measuring body 101 in a matching manner.
The arc-shaped centering sleeve 502 may be a semi-arc shape, and the above-mentioned centering member 5 may be made of a metal sheet, for example, an iron sheet.
In the embodiment of the present invention, the main tension scale 102 is disposed in the tension and stress measuring assembly 1, and is used to prevent over-range measurement, that is, to prevent the spring 104 from being damaged due to excessive tension, which is beneficial to ensuring the service life of the tension and stress measuring assembly 1.
In order to facilitate the detachment and installation of the main tension scale 102, the embodiment of the invention enables the main tension scale 102 to be detachably connected with the measurement body 101. As for the detachable connection manner between the two, as an example, a first scale clamper 6 is arranged at a position on the measurement body 101 corresponding to the main pull scale 102, and the main pull scale 102 is clamped with the first scale clamper 6.
In one possible implementation, as shown in figures 1 and 2, the first scale escapement 6 comprises: the card comprises a first vertical card section, a first horizontal card section and a second vertical card section;
the first vertical clamping section is provided with a first vertical clamping cavity, and the lower end of the first vertical clamping section is vertically connected with one end of the first horizontal clamping section;
the first horizontal clamping section is provided with a first horizontal clamping cavity, and the other end of the first horizontal clamping section is vertically connected with the lower end of the second vertical clamping section;
the second vertical clip section has a second vertical clip cavity, and the upper end of the second vertical clip section is located below the lowest scale line of the main tension scale 102.
During the application, make a side portion of pulling force main scale 102 insert the first vertical card intracavity of first vertical card section, make the bottom of pulling force main scale 102 insert the first horizontal card intracavity of first horizontal card section, make another lateral part of pulling force main scale 102 insert the second vertical card intracavity of second vertical card section, three card chamber cooperation realizes the installation of pulling force main scale 102 on first scale fastener 6 and fixes. When the pull force main scale 102 is disassembled, the pull force main scale 102 is only required to be pulled out from the clamping cavities.
The upper end of the second vertical clamping section is located below the lowest scale line of the main pulling force scale 102, so that the main pulling force scale 102 can be normally used, and the scale line is prevented from being shielded.
In order to facilitate the detachment and installation of the stress main scale 103, the embodiment of the invention enables the stress main scale 103 to be detachably connected with the measurement body 101. As for the detachable connection manner between the two, as shown in fig. 1 and fig. 2, as an example, a second scale clamper 7 is arranged on the measuring body 101 at a position corresponding to the stress main scale 103; the stress main scale 103 is clamped with the second scale clamping piece 7.
In one possible implementation, the second scale escapement 7 comprises: a third vertical clamping section, a second horizontal clamping section and a fourth vertical clamping section;
the third vertical clamping section is provided with a third vertical clamping cavity, and the lower end of the third vertical clamping section is vertically connected with one end of the second horizontal clamping section;
the second horizontal clamping section is provided with a second horizontal clamping cavity, and the other end of the second horizontal clamping section is vertically connected with the lower end of the fourth vertical clamping section;
the fourth vertical clip section has a fourth vertical clip cavity, and the upper end of the fourth vertical clip section is located below the lowest scale line of the stress main scale 103.
During the application, make a side portion of stress main scale 103 insert the third vertical card intracavity of third vertical card section, make the bottom of stress main scale 103 insert the second horizontal card intracavity of second horizontal card section, make another lateral part of stress main scale 103 insert the fourth vertical card intracavity of fourth vertical card section, three card chamber cooperation realizes the installation of stress main scale 103 on first scale fastener 6 and fixes. When the stress main scale 103 is disassembled, the stress main scale 103 is only required to be pulled out from the clamping cavities.
Wherein, the upper end that makes the fourth vertical card section is located the below of the minimum scale mark of stress main scale 103 to ensure that stress main scale 103 can normal use, avoid sheltering from the scale mark.
When the main cables with different diameters are subjected to stress adjustment and measurement, the tension of the tension and stress measurement assembly 1 is unchanged, and the stress value is the tension value divided by the diameter of the main cable. Therefore, only the stress main scale 103 needs to be replaced. The scale of the new main scale 103 for stress is determined according to the diameter of the main cable to be measured, and has the same one-to-one correspondence relationship with the main scale 102 for tension.
Therefore, the tension and stress measuring assembly 1 provided by the embodiment of the invention can flexibly replace the stress main scale 103 according to the diameter of the main cable of the spanning structure model, so as to achieve the purpose of accurately and visually displaying the internal stress of the main cable to be measured.
During stress adjustment and measurement, the vernier 105 moves up and down along the measurement body 101 along with the rotation of the adjusting screw 202, and in order to keep the up-and-down movement of the vernier 105 stable and vertical, guide grooves which are sequentially communicated from top to bottom are formed in the measurement body 101; as shown in fig. 2, a connecting piece 107 is connected to the surface of the vernier scale 105 facing the measuring body 101; the link 107 is accommodated in the guide groove and can move up and down along the guide groove.
For example, the connecting member 107 includes: a first section connected to the surface of the vernier 105 facing the measuring body 101, which may be in a rod-like configuration, and a second section connected to the first section, which may be in a plate-like configuration. Correspondingly, the guide groove comprises: a first slot adapted to receive the first section and a second slot adapted to receive the second section.
The vernier scale 105 may be configured as a standard rectangular sheet structure, and corresponding vernier scales are respectively disposed on left and right sides of the main tension scale 102 and the main tension scale 103.
For the length adjustment assembly 2, it is used to adjust the tension of the main cable and thus its stress. The housing 203 in the length adjustment assembly 2 is used to house the moving slide 201 and the adjustment screw 202 in order to shield them.
In one possible implementation manner, as shown in fig. 1, the housing 203 has a first accommodating cavity therein, and the top of the housing 203 has a first through hole, and the first through hole is communicated with the top of the first accommodating cavity; the movable sliding rod 201 passes through the first through hole and is seated in the first accommodating cavity.
During the application, the lower extreme of removing slide bar 201 passes first via hole and gets into first chamber that holds, until with the first diapire looks butt contact that holds the chamber, like this, removes slide bar 201 and can stably be located first intracavity that holds.
Further, as shown in fig. 1, the housing 203 has a second accommodating chamber therein, and a side portion of the second accommodating chamber communicates with a side portion of the first accommodating chamber; the bottom of the housing 203 is provided with a second through hole, and the second through hole is communicated with the bottom of the second accommodating cavity. The adjustment screw 202 includes: a rod body 2021 with screw threads, an operating head 2022 connected with the bottom of the rod body 2021; the rod body 2021 penetrates through the second through hole and is limited in the second containing cavity to be meshed with the transmission gear; the operating head 2022 is located outside the housing 203.
The upper end of the adjusting screw 202 passes through the second through hole and enters the second accommodating cavity until being abutted against the top wall of the second accommodating cavity. Meanwhile, the rod body 2021 of the adjusting screw 202 is engaged with the transmission gear on the moving slide rod 201 through the thread thereon (the side part of the second accommodating chamber is communicated with the side part of the first accommodating chamber, providing an engaging space for the second accommodating chamber), so that the adjusting screw 202 is limited and prevented from falling from the second accommodating chamber.
During application, the operating head 2022 of the adjusting screw 202 is rotated to drive the rod body 2021 of the adjusting screw 202 to rotate, and since the upper end of the rod body 2021 is limited by the top wall of the second accommodating chamber, the lower end of the rod body 2021 is limited by a user (for example, the user rotates the operating head 2022 with a finger and always upwards supports the operating head 2022), so that the adjusting screw 202 can be rotated in situ in the second accommodating chamber all the time without moving in the vertical direction.
The rotation of the rod 2021 can be converted into a linear movement of the moving slide 201 in the vertical direction, based on the engagement of the thread on the rod 2021 of the adjusting screw 202 with the gear teeth. Wherein the drive teeth may be trapezoidal teeth. The operating head 2022 of the adjustment screw 202 may be a hex nut.
The stress of a main cable of a pipeline suspension cable crossing structure model is adjusted and tested by using the stress adjusting device for the main cable of the pipeline suspension cable crossing structure model provided by the embodiment of the invention, and the specific operation is as follows:
the length of a main span of a suspended cable spanning structure of a natural gas pipeline is 360m, the vector span ratio of a main cable is 1/10, the diameter of the section of a steel rope of the main cable is 118mm, and the internal force of the suspended cable spanning structure is 2000kN in a bridge state by field detection, namely the prestress is 183 MPa. The whole spanning structure is built on an indoor experimental platform by adopting a reduced scale of 1/40, and the cross section diameter of a main cable size reduction model (steel rope) is 2.95mm, the size of the received internal force is 1250N, and the prestress is 183MPa through calculation of geometric, material and static force similarity criteria. Based on the above, the pipeline suspension cable crossing structure model main cable stress adjusting device provided by the embodiment of the invention is adopted for debugging to meet the design requirements, and the steps are as follows:
(1) the scale of the tension and stress measuring assembly 1 is arranged: for the main pull scale 102 on one side, the measuring range is 2000N, the division value is 20N, and there are 100 equally divided graduation lines in total, and the measuring range of the corresponding vernier 105 is set to 180N, and there are 20 equally divided graduation lines in total, so the division value is 1N.
For the main stress scale 103 on the other side, the measuring range is 250MPa, the division value is 5MPa, 50 equal division scale lines are arranged, the measuring range of the corresponding vernier 105 is 45MPa, 10 equal division scale lines are arranged, and the division value is 0.5 MPa. Wherein the 0 scale mark of each main scale is level and level with the left and right 0 scale marks of the vernier 105.
(2) Calibration and zeroing: the tension and stress measuring assembly 1 is calibrated and zeroed so that the vernier scale 1050 graduation lines are aligned with the 0 graduation lines of the tension main scale 102 and the stress main scale 103 respectively.
(3) Installation of the stress measuring device: the main cable model, i.e. the thin steel wire rope, is divided into two sections, the upper section is connected with the upper suspension loop 3, and the lower section is connected with the lower suspension loop 4. By rotating the adjusting screw 202, the main cable together with the entire device is just under tension.
(4) Test procedures and results: by slowly rotating the adjusting screw 202 to control the moving distance of the vernier 105 while observing the magnitude of the stress indicated by the zero scale line corresponding to the side of the stress main scale 103, the rotation of the adjusting screw 202 is stopped when the stress of the main cable reaches 183 MPa. At this time, the scale value of the corresponding stress main scale 103 is recorded as 180MPa, the vernier 105 is located between the 36 th scale mark (180MPa) and the 37 th scale mark (185MPa), and the reading of the vernier 105 is 3MPa, that is, the 6 th scale mark of the vernier 105 is exactly aligned with the scale mark of the main scale. At the moment, the prestress borne by the main cable crossing the pipeline can be successfully debugged.
(5) Similarly, when the prestress of the main cable with other diameters needs to be adjusted, the main stress scale 103 only needs to be taken out and correspondingly replaced by the adaptive main stress scale.
In embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
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 (10)
1. A pipeline span structure model main cable stress adjusting device is characterized by comprising: the tension and stress measuring assembly, the length adjusting assembly, the upper hanging ring and the lower hanging ring are arranged on the upper hanging ring;
the tension and stress measuring assembly comprises: the measuring device comprises a measuring body, a tension main scale, a stress main scale, a spring, a vernier and a dowel bar;
the tension main scale and the stress main scale are symmetrically positioned on the left side and the right side of the measuring body, and the scales of the stress main scale correspond to the scales of the tension main scale one by one;
the spring is suspended at the upper part of the measuring body;
the vernier scale is connected with the lower end of the spring, and the left side and the right side of the vernier scale are provided with a tension vernier scale and a stress vernier scale which are respectively matched with the tension main scale and the stress main scale;
the upper end of the dowel bar is vertically connected with the lower end of the vernier;
the length adjustment assembly includes: the sliding rod, the adjusting screw and the shell are moved;
the movable sliding rod is connected with the lower end of the dowel bar, and transmission teeth are arranged on the wall of the movable sliding rod along the vertical direction;
the adjusting screw is configured to be meshed with the transmission gear and drives the moving slide rod to move in the vertical direction through rotation;
the shell is configured to accommodate the adjusting screw rod and the moving slide rod and enable the adjusting screw rod to rotate in situ;
the upper hanging ring is fixed at the top of the measuring body, and the lower hanging ring is fixed at the bottom of the shell.
2. The apparatus for adjusting the stress of a main cable of a pipe catenary span structural model according to claim 1, wherein the measuring apparatus further comprises: the righting piece is fixed on the measuring body, and is matched with the measuring body to form a righting cavity;
the dowel bar penetrates through the righting cavity.
3. The apparatus for adjusting the stress in a pipe catenary crossover structural model main cable of claim 2, wherein the centralizer comprises: the device comprises an arc-shaped righting sleeve and two fixing plates connected with two ends of the arc-shaped righting sleeve;
the two fixing plates are fixed on the measuring body through screws;
the circular arc-shaped righting sleeve is matched with the measuring body to form the righting cavity.
4. The device for adjusting the stress of a main cable of a pipeline span structure model according to claim 1, wherein a first scale clamp is arranged on the measuring body at a position corresponding to the main tension scale;
the tension main scale is clamped with the first scale clamping piece.
5. The apparatus for adjusting the stress of a main cable spanning a structural model of a pipe messenger according to claim 4, wherein the first scale catch comprises: the card comprises a first vertical card section, a first horizontal card section and a second vertical card section;
the first vertical clamping section is provided with a first vertical clamping cavity, and the lower end of the first vertical clamping section is vertically connected with one end of the first horizontal clamping section;
the first horizontal clamping section is provided with a first horizontal clamping cavity, and the other end of the first horizontal clamping section is vertically connected with the lower end of the second vertical clamping section;
the second vertical clamping section is provided with a second vertical clamping cavity, and the upper end of the second vertical clamping section is located below the lowest scale mark of the main tension scale.
6. The device for adjusting the stress of a main cable of a pipeline span structural model according to claim 1, wherein a second scale catch is provided on the measuring body at a position corresponding to the main stress scale;
and the stress main scale is clamped with the second scale clamping piece.
7. The apparatus for adjusting the stress of a main cable for a pipe messenger spanning a structural model according to claim 6, wherein the second scale catch comprises: a third vertical clamping section, a second horizontal clamping section and a fourth vertical clamping section;
the third vertical clamping section is provided with a third vertical clamping cavity, and the lower end of the third vertical clamping section is vertically connected with one end of the second horizontal clamping section;
the second horizontal clamping section is provided with a second horizontal clamping cavity, and the other end of the second horizontal clamping section is vertically connected with the lower end of the fourth vertical clamping section;
the fourth vertical clamping section is provided with a fourth vertical clamping cavity, and the upper end of the fourth vertical clamping section is positioned below the lowest scale mark of the stress main scale.
8. The stress adjusting device for the main cable of the pipeline suspension cable crossing structure model according to claim 1, wherein the measuring body is provided with guide grooves which are sequentially communicated from top to bottom;
the surface of the vernier facing the measuring body is connected with a connecting piece;
the connecting piece is accommodated in the guide groove and can move up and down along the guide groove.
9. The device for adjusting the main cable stress of a pipe span structural model according to claim 1, wherein the housing has a first accommodating cavity inside, the housing top has a first through hole, and the first through hole is communicated with the top of the first accommodating cavity;
the movable sliding rod penetrates through the first through hole and is seated in the first accommodating cavity.
10. The apparatus for adjusting the main cable tension in a pipe span structural model according to claim 9, wherein the housing has a second receiving chamber therein, a side portion of the second receiving chamber communicating with a side portion of the first receiving chamber;
the bottom of the shell is provided with a second through hole which is communicated with the bottom of the second accommodating cavity;
the adjusting screw includes: the operating head is connected with the bottom of the rod body;
the rod body penetrates through the second through hole, is limited in the second containing cavity and is meshed with the transmission gear;
the operating head is located outside the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010622098.XA CN113884233B (en) | 2020-07-01 | 2020-07-01 | Main cable stress adjusting device of pipeline suspension cable crossing structure model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010622098.XA CN113884233B (en) | 2020-07-01 | 2020-07-01 | Main cable stress adjusting device of pipeline suspension cable crossing structure model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113884233A true CN113884233A (en) | 2022-01-04 |
| CN113884233B CN113884233B (en) | 2023-12-22 |
Family
ID=79012671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010622098.XA Active CN113884233B (en) | 2020-07-01 | 2020-07-01 | Main cable stress adjusting device of pipeline suspension cable crossing structure model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113884233B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251492A (en) * | 1991-02-28 | 1993-10-12 | Deutsche Aerospace Airbus Gmbh | Apparatus and method for measuring a tension force in a rope or cable |
| CN205843854U (en) * | 2016-07-27 | 2016-12-28 | 师海满 | A kind of high accuracy weight beam |
| CN106500900A (en) * | 2016-11-07 | 2017-03-15 | 重庆交通大学 | A kind of Cable force measuring device and its measuring method |
| DE102016106076A1 (en) * | 2016-04-04 | 2017-10-05 | Hans Schmidt & Co GmbH | Mobile tension measuring device |
| CN109489882A (en) * | 2018-11-22 | 2019-03-19 | 长安大学 | Big-size model test is anchored with cable-stayed bridge cable and cable tension test device and method |
| CN210722124U (en) * | 2019-11-19 | 2020-06-09 | 中国交通建设股份有限公司 | Suspension tunnel test cable initial tension's adjusting device and test system under water |
-
2020
- 2020-07-01 CN CN202010622098.XA patent/CN113884233B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251492A (en) * | 1991-02-28 | 1993-10-12 | Deutsche Aerospace Airbus Gmbh | Apparatus and method for measuring a tension force in a rope or cable |
| DE102016106076A1 (en) * | 2016-04-04 | 2017-10-05 | Hans Schmidt & Co GmbH | Mobile tension measuring device |
| CN205843854U (en) * | 2016-07-27 | 2016-12-28 | 师海满 | A kind of high accuracy weight beam |
| CN106500900A (en) * | 2016-11-07 | 2017-03-15 | 重庆交通大学 | A kind of Cable force measuring device and its measuring method |
| CN109489882A (en) * | 2018-11-22 | 2019-03-19 | 长安大学 | Big-size model test is anchored with cable-stayed bridge cable and cable tension test device and method |
| CN210722124U (en) * | 2019-11-19 | 2020-06-09 | 中国交通建设股份有限公司 | Suspension tunnel test cable initial tension's adjusting device and test system under water |
Non-Patent Citations (1)
| Title |
|---|
| 任洪田等: "悬索桥主缆索夹抗滑试验及应力测试分析", 《北方交通》, no. 3, pages 74 - 76 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113884233B (en) | 2023-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100937475B1 (en) | Apparatus for testing solenoid valve wire | |
| US8950268B2 (en) | Material testing machine | |
| CN200986512Y (en) | Spring extension and compression testing machine | |
| JP4453980B2 (en) | Hose bending stiffness measuring device | |
| CN103292969B (en) | Manual spring tension and compression testing machine | |
| CN201569384U (en) | Auxiliary clamp of dial indicator measuring instrument | |
| CN102353318A (en) | Long-spans mall-displacement automatic measuring method and apparatus thereof | |
| CN113884233A (en) | Pipeline suspension cable crossing structure model main cable stress adjusting device | |
| CN107328645B (en) | Thin-walled bar experimental rig and test method | |
| US3286516A (en) | Apparatus for performing flexure tests | |
| US3600939A (en) | Extensometer and attachment | |
| CN209215110U (en) | A kind of experimental rig of the uniaxial tensile test suitable for viscoelastic material | |
| CN203287173U (en) | Manual spring tension-compression testing machine | |
| CN201133909Y (en) | Yarn crimp tester | |
| CN102853735B (en) | Clamping sheet exposing value measuring device of front clamping type jack | |
| CN208860513U (en) | A kind of spring force value test machine | |
| CN210255847U (en) | Clamp for crutch deflection bending test | |
| US3425131A (en) | Extensometer | |
| CN202709956U (en) | Device for measuring exposure value of clamping piece of front clamp type jack | |
| CN105716765A (en) | Force measuring device and method capable of changing magnitude of applied force continuously | |
| CN206891361U (en) | A kind of cylinder linearity testing apparatus | |
| CN201000378Y (en) | Curtain wall tightwire pull force tester | |
| US631540A (en) | Indicator for use in testing materials. | |
| CN216485021U (en) | Automatic measure testing arrangement of concrete shrinkage | |
| RU156966U1 (en) | DEVICE FOR MEASURING RADIAL BEATING OF AN EXTERNAL TOOL DIAMETER |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |