CN112414850A - Experimental device for bending steel member and use method - Google Patents

Experimental device for bending steel member and use method Download PDF

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Publication number
CN112414850A
CN112414850A CN202011632157.8A CN202011632157A CN112414850A CN 112414850 A CN112414850 A CN 112414850A CN 202011632157 A CN202011632157 A CN 202011632157A CN 112414850 A CN112414850 A CN 112414850A
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seat
steel pipe
rectangular steel
telescopic ruler
rotating
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胡学友
徐庆辉
杨俊宇
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Anhui Yuyan Intelligent Machinery Technology Co ltd
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Anhui Yuyan Intelligent Machinery Technology Co ltd
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Publication of CN112414850A publication Critical patent/CN112414850A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/025—Geometry of the test
    • G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0274—Tubular or ring-shaped specimens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0605—Mechanical indicating, recording or sensing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0682—Spatial dimension, e.g. length, area, angle

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  • Educational Technology (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention belongs to the technical field of civil engineering experiments, and particularly relates to an experimental device for bending a steel member and a using method thereof, which comprises a rectangular steel pipe, an upper fixed seat, a measuring mechanism and a longitudinal telescopic ruler, wherein the upper fixed seat and the lower fixed seat are clamped at the upper end and the lower end of the rectangular steel pipe, the upper fixed seat and the lower fixed seat are respectively welded with an upper hinging mechanism and a lower hinging mechanism, a jack sleeve welded at the top end of the upper hinging mechanism is sleeved with a hydraulic jack, the hydraulic jack is arranged at the top of a counterforce frame, two adjacent vertical side surfaces of the upper hinging mechanism are connected with an upper U-shaped seat through a first fixed rod, the measuring mechanism is arranged on a guide rod in sliding connection with the upper U-shaped seat in a sliding manner, the vertical side surface at the other side of the upper hinging mechanism is connected with the longitudinal telescopic ruler through a second fixed rod and an L-shaped, the longitudinal telescopic ruler and the measuring mechanism can measure the transverse deformation and the longitudinal deformation of the rectangular steel pipe.

Description

Experimental device for bending steel member and use method
Technical Field
The invention belongs to the technical field of civil engineering experiments, and particularly relates to an experimental device for bending a steel member and a using method thereof.
Background
The demonstration experiment project of the steel structure teaching mainly covers the contents of integral stability of an axial compression member, local stability of the axial compression member, integral instability and connection of a bent member and the like, and the experiment project of the bending member does not exist, in the steel structure teaching setting, the research on the integral stability in a plane of the bending member is usually a research on a one-way bending member, the one-way bending member is acted by a one-way bending moment besides axial pressure, so that the influence of the eccentricity error of the bending member on the accuracy of an experiment result needs to be noticed in a bending test, in addition, when the one-way bending member is subjected to the one-way bending test, the inclination of the upper end surface and the lower end surface caused by the stress deformation of the bending member can influence the stability of a hydraulic jack on the pressure applied to a rectangular steel pipe, Chinese patent with an authorization publication No. CN106644534B discloses an experiment device of the bending steel member, and the effective support outside the integral instability plane of the bending steel member and the adjustment of the eccentricity are, but cannot measure the lateral deformation and the longitudinal deformation of the bent steel member.
Disclosure of Invention
To solve the problems set forth in the background art described above. The invention provides an experimental device for bending a steel member and a using method thereof.
In order to achieve the purpose, the invention provides the following technical scheme: the experimental device for bending the steel member comprises a rectangular steel pipe, an upper fixing seat, a measuring mechanism and a longitudinal telescopic ruler, wherein the upper end and the lower end of the rectangular steel pipe are respectively clamped and connected with the upper fixing seat and the lower fixing seat, the top end of the upper fixing seat is welded with an upper hinge mechanism, the bottom end of the lower fixing seat is welded with a lower hinge mechanism, the lower hinge mechanism is fixedly arranged on the inner bottom surface of a reaction frame, the top end of the upper hinge mechanism is welded with a jack sleeve, the jack sleeve is sleeved with a push rod connected with a hydraulic jack, the hydraulic jack is fixedly arranged at the top of the reaction frame, two adjacent vertical sides of the upper hinge mechanism are fixedly connected with an upper U-shaped seat through a first fixing rod, the bottom of the upper U-shaped seat is provided with a through hole for slidably connecting a guide rod, the guide rod is slidably arranged with the measuring mechanism, and the vertical side of the other side of the upper hinge mechanism is fixedly, the L-shaped seat is fixedly connected with the top end of the longitudinal telescopic ruler.
Preferably, the upper hinge mechanism and the lower hinge mechanism have the same structural size, the upper hinge mechanism comprises a knife hinge and a hinge base, the top surface of the knife hinge in the upper hinge mechanism is welded at the bottom of a jack sleeve, the jack sleeve is of a circular tube type structure, the knife hinge in the upper hinge mechanism is hinged and welded with the hinge base at the top end of an upper fixing base, the knife hinge in the lower hinge mechanism is welded at the inner bottom surface of a reaction frame, and the hinge base in the lower hinge mechanism is welded at the bottom surface of a lower fixing base; after the upper end face and the lower end face of the rectangular steel pipe incline due to stress deformation, the upper hinge mechanism and the lower hinge mechanism can keep the contact areas of the upper fixing seat, the lower fixing seat and the rectangular steel pipe within a small variation range, and apply stable pressure to the rectangular steel pipe.
Preferably, the structure size of the upper fixing seat is the same as that of the lower fixing seat, the upper fixing seat comprises a main seat, a first chute, a second chute, a first clamping block, a second clamping block, a first rotating rod and a second rotating rod, the end face of the main seat, which is connected with the rectangular steel pipe, is bilaterally symmetrical, the two first chutes are symmetrically arranged at the front and the back, the two second chutes are symmetrically arranged at the front and the back, the first rotating rod rotates to penetrate through the left end face and the right end face of the main seat, the second rotating rod rotates to penetrate through the front and the back end faces of the main seat, the first rotating rod is the same as the second rotating rod in structure, the first rotating rod is rotatably installed on the main seat above the second rotating rod, the first rotating rod comprises a rotating section, a screw rod and a hexagonal prism, the rotating section, the screw rod and the hexagonal prism are of an integrated structure, the rotating section is of a cylindrical structure, the screw rod is arranged at two ends of, The hexagonal prism is arranged at the other end of the first rotating rod, the screw threads at two ends of the rotating section of the first rotating rod are connected with first clamping blocks, and the screw threads at two ends of the rotating section of the second rotating rod are connected with second clamping blocks; when the fixed rectangle steel pipe of operating personnel was in the centre gripping, can use the spanner to rotate the hexagonal prism on fixing base and the lower fixing base, make the axis direction that is located the first grip block in the rectangle steel pipe outside and the upwards fixing base of second grip block remove the same horizontal distance, carry out the centre gripping of feeling relieved certainly to the rectangle steel pipe, reduce the influence of the eccentricity error of rectangle steel pipe to the experimental result accuracy.
Preferably, the first sliding groove and the second sliding groove are both of a dovetail groove structure, one end of the first clamping block is slidably mounted on the inner side of the first sliding groove, and one end of the second clamping block is slidably mounted on the inner side of the second sliding groove; first spout and second spout can provide spacing guide effect to first grip block, second grip block, improve the centre gripping effect of first grip block, second grip block to the rectangle steel pipe.
Preferably, the longitudinal telescopic ruler is vertically and fixedly installed on the inner bottom surface of the reaction frame and comprises an inner telescopic ruler, an outer sleeve, a screw hole, a scale mark, an inner guide rod and a spring, the inner telescopic ruler is of a square pipe structure with two closed ends, the outer sleeve is of a square pipe structure with a closed bottom end, the inner telescopic ruler is slidably installed on the inner side of the outer sleeve, the scale mark is arranged on the vertical side surface of the inner telescopic ruler, an internal thread through hole is formed in the top end of the inner telescopic ruler, a through hole connected with the inner guide rod in a sliding mode is formed in the bottom end of the inner telescopic ruler, the number of the inner guide rods is two, the inner guide rods are vertically and fixedly installed on the inner bottom surface of the outer sleeve, and the spring is sleeved on the outer side of the inner guide rod between the bottom surface of the inner telescopic ruler and the; when the hydraulic jack stretches and retracts to drive the upper hinge mechanism and the upper fixing seat to carry out bending test on the rectangular steel pipe, the longitudinal telescopic ruler stretches synchronously with the hydraulic jack under the driving of the second fixing rod and the L-shaped seat, and therefore the longitudinal deformation of the rectangular steel pipe is measured.
Preferably, the measuring mechanism comprises a lower U-shaped seat, a clamping screw rod, a rotating handle, a U-shaped base, a screw, a transverse telescopic ruler and a top joint, the transverse telescopic ruler is the same as the longitudinal telescopic ruler in structure, one end of the transverse telescopic ruler is fixedly arranged on the inner side of the U-shaped base through the screw, the other end of the transverse telescopic ruler is fixedly connected with the top joint, one end of the U-shaped base is fixedly connected with the side surface of the lower U-shaped seat facing the rectangular steel pipe, the bottom of the lower U-shaped seat is provided with a through hole in sliding connection with a guide rod, the top joint comprises a fixed block, a square groove, a rotating seat and a steel ball, the square groove is arranged on the side surface of the fixed block and sleeved on the outer side of one end of the transverse telescopic ruler, the rotating seat is fixedly arranged on the side surface of the fixed block opposite to the square groove, and the, the steel ball is rotatably arranged in a spherical groove formed in the rotating seat and is rotatably connected with the vertical side face of the rectangular steel pipe; the transverse expansion ruler in the measuring mechanism arranged on the adjacent side surfaces of the rectangular steel pipe can measure the transverse deformation of the rectangular steel pipe.
Preferably, the guide rod is vertically and fixedly installed on the inner bottom surface of the reaction frame, an internal thread through hole in threaded connection with a clamping screw rod is formed in the side surface of the lower U-shaped seat, and a rotating handle is fixedly connected to one end of the clamping screw rod; an operator can slidably adjust the height of the measuring mechanism on the guide rod, so that the top joint is positioned on the middle section of the rectangular steel pipe, the rotating handle is rotated to enable the clamping screw to translate to clamp the guide rod, the measuring mechanism and the guide rod are kept relatively fixed, and therefore the transverse deformation of the rectangular steel pipes with different heights can be accurately measured.
Preferably, the using method of the device operates according to the following flow:
step S1, respectively sleeving an upper fixing seat and a lower fixing seat on the upper end and the lower end of a rectangular steel pipe, rotating a hexagonal prism by using a wrench to enable a first clamping block and a second clamping block to horizontally move to clamp and fix the side face of the rectangular steel pipe, completing the connection of the upper fixing seat, the lower fixing seat and the rectangular steel pipe, and entering step S2;
step S2, the knife hinge welded with the jack sleeve is lifted in an upward sliding mode, the jack sleeve is sleeved on a push rod of a hydraulic jack, the rectangular steel pipe is vertically placed on the inner side of a reaction frame, a hinge seat at the bottom end of the lower fixing seat is hinged and connected with the knife hinge on the inner bottom surface of the reaction frame, then the hydraulic jack is controlled to be started to stretch, the push rod of the hydraulic jack drives the knife hinge at the bottom end of the jack sleeve to move downwards and is hinged and connected with the knife hinge at the top end of the upper fixing seat, the rectangular steel pipe is installed and fixed on the reaction frame, and the step S3 is carried out;
and S3, rotating the rotating handles on the two measuring mechanisms to release the clamping screw to clamp and fix the measuring mechanisms, then sliding the measuring mechanisms to enable the jacking joint to move to the plane where the middle section of the rectangular steel pipe is located, enabling the steel balls in the two measuring mechanisms to be in rolling contact with the side faces of the rectangular steel pipe at the moment, enabling the transverse telescopic ruler to generate elastic energy storage, recording initial values of the scale marks on the longitudinal telescopic ruler and the two transverse telescopic rulers by a tester at the moment, starting the hydraulic jack to perform a bending test, recording the value of the changed scale mark again after the loading is finished, and subtracting the value before the loading is finished from the recorded value after the loading is finished to obtain the transverse and longitudinal deformation distances of the rectangular steel pipe.
Compared with the prior art, the invention has the beneficial effects that: after the upper end surface and the lower end surface of the rectangular steel pipe are inclined due to stress deformation, the contact areas of the upper fixing seat, the lower fixing seat and the rectangular steel pipe can be kept in a small change range by the upper hinge mechanism and the lower hinge mechanism, and stable pressure is applied to the rectangular steel pipe; when an operator clamps and fixes the rectangular steel pipe, the hexagonal prisms on the upper fixing seat and the lower fixing seat can be rotated by using a wrench, so that the first clamping block and the second clamping block which are positioned on the outer side of the rectangular steel pipe move to the axial direction of the upper fixing seat by the same horizontal distance, the rectangular steel pipe is clamped by self-centering, and the influence of the eccentric distance error of the rectangular steel pipe on the accuracy of an experimental result is reduced; the first sliding groove and the second sliding groove can provide limiting and guiding effects for the first clamping block and the second clamping block, and the clamping effect of the first clamping block and the second clamping block on the rectangular steel pipe is improved; when the hydraulic jack stretches and drives the upper hinge mechanism and the upper fixing seat to carry out bending test on the rectangular steel pipe, the longitudinal telescopic ruler stretches synchronously with the hydraulic jack under the driving of the second fixing rod and the L-shaped seat, so that the longitudinal deformation of the rectangular steel pipe is measured; the transverse expansion ruler in the measuring mechanism arranged on the adjacent side surfaces of the rectangular steel pipe can measure the transverse deformation of the rectangular steel pipe; an operator can slidably adjust the height of the measuring mechanism on the guide rod, so that the top joint is positioned on the middle section of the rectangular steel pipe, the rotating handle is rotated to enable the clamping screw to translate to clamp the guide rod, the measuring mechanism and the guide rod are kept relatively fixed, and therefore the transverse deformation of the rectangular steel pipes with different heights can be accurately measured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is an enlarged view of A of the present invention;
FIG. 4 is a schematic view of a connection structure of an upper hinge mechanism, an upper fixing seat and a jack sleeve according to the present invention;
FIG. 5 is a schematic structural view of an upper fixing base according to the present invention;
FIG. 6 is a first longitudinal sectional view of the upper fixing base according to the present invention;
FIG. 7 is a second longitudinal sectional view of the upper fixing base of the present invention;
FIG. 8 is a schematic view of the installation structure of the measuring mechanism of the present invention;
FIG. 9 is a schematic view of the structure of the measuring mechanism of the present invention;
FIG. 10 is a schematic view of the construction of the top sub of the present invention;
FIG. 11 is a longitudinal cross-sectional view of the top sub of the present invention;
FIG. 12 is a schematic view of the longitudinal extension/contraction ruler according to the present invention;
FIG. 13 is a longitudinal sectional view of the longitudinal expansion/contraction ruler according to the present invention;
in the figure: 1. a reaction frame; 2. a hydraulic jack; 3. an upper hinge mechanism; 301. cutting and reaming; 302. hinging seat; 4. an upper fixed seat; 401. a main base; 402. a first chute; 403. a second chute; 404. a first clamping block; 405. a second clamping block; 406. a first rotating lever; 4061. a rotating section; 4062. a screw; 4063. a hexagonal prism; 407. a second rotating rod; 5. a rectangular steel pipe; 6. a first fixing lever; 7. an upper U-shaped seat; 8. a second fixing bar; 9. an L-shaped seat; 10. a guide bar; 11. a measuring mechanism; 111. a lower U-shaped seat; 112. clamping the screw rod; 113. a handle is rotated; 114. a U-shaped base; 115. a screw; 116. a transverse telescopic ruler; 117. a top sub; 1171. a fixed block; 1172. a square groove; 1173. a rotating seat; 1174. a steel ball; 12. a longitudinal extension rule; 121. an inner telescopic ruler; 122. an outer sleeve; 123. a screw hole; 124. scale lines; 125. an inner guide rod; 126. a spring; 13. a lower fixed seat; 14. a lower hinge mechanism; 15. a jack casing pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-13, the present invention provides the following technical solutions: the experimental device for bending the steel member and the using method thereof comprise a rectangular steel pipe 5, an upper fixing seat 4, a measuring mechanism 11 and a longitudinal telescopic ruler 12, wherein the upper end and the lower end of the rectangular steel pipe 5 are respectively connected with the upper fixing seat 4 and a lower fixing seat 13 in a clamping manner, the top end of the upper fixing seat 4 is welded with an upper hinge mechanism 3, the bottom end of the lower fixing seat 13 is welded with a lower hinge mechanism 14, the lower hinge mechanism 14 is fixedly arranged on the inner bottom surface of a reaction frame 1, the top end of the upper hinge mechanism 3 is welded with a jack sleeve 15, the jack sleeve 15 is sleeved with a push rod connected with a hydraulic jack 2, the hydraulic jack 2 is fixedly arranged at the top of the reaction frame 1, two adjacent vertical side surfaces of the upper hinge mechanism 3 are fixedly connected with an upper U-shaped seat 7 through a first fixing rod 6, and the bottom of the upper U-shaped seat 7 is provided with, the measuring mechanism 11 is arranged on the guide rod 10 in a sliding mode, the vertical side face of the other side of the upper hinge mechanism 3 is fixedly connected with an L-shaped seat 9 through a second fixing rod 8, and the L-shaped seat 9 is fixedly connected with the top end of a longitudinal telescopic ruler 12.
Specifically, the upper hinge mechanism 3 and the lower hinge mechanism 14 have the same structural size, the upper hinge mechanism 3 includes a knife hinge 301 and a hinge base 302, the top surface of the knife hinge 301 in the upper hinge mechanism 3 is welded to the bottom of a jack sleeve 15, the jack sleeve 15 is of a circular tube type structure, the knife hinge 301 in the upper hinge mechanism 3 is hinged to a hinge base 302 welded to the top end of an upper fixing base 4, the knife hinge 301 in the lower hinge mechanism 14 is welded to the inner bottom surface of a reaction frame 1, and the hinge base 302 in the lower hinge mechanism 14 is welded to the bottom surface of a lower fixing base 13; after the upper end surface and the lower end surface of the rectangular steel pipe 5 are inclined due to stress deformation, the upper hinge mechanism 3 and the lower hinge mechanism 14 can keep the contact areas of the upper fixing seat 4, the lower fixing seat 13 and the rectangular steel pipe 5 within a small variation range, and apply stable pressure to the rectangular steel pipe 5.
Specifically, the upper fixing seat 4 and the lower fixing seat 13 have the same structural size, the upper fixing seat 4 includes a main seat 401, a first sliding groove 402, a second sliding groove 403, a first clamping block 404, a second clamping block 405, a first rotating rod 406 and a second rotating rod 407, two first sliding grooves 402 are symmetrically arranged on the left and right of the end surface of the main seat 401 connected to the rectangular steel tube 5, two second sliding grooves 403 are symmetrically arranged on the front and back of the end surface, the first rotating rod 406 rotatably penetrates through the left and right end surfaces of the main seat 401, the second rotating rod 407 rotatably penetrates through the front and back end surfaces of the main seat 401, the first rotating rod 406 and the second rotating rod 407 have the same structure, the first rotating rod 406 is rotatably mounted on the main seat 401 above the second rotating rod 407, the first rotating rod 406 includes a rotating section 4061, a screw 4062 and a hexagonal prism 4063, the rotating section 4061, the screw 4062 and the hexagonal prism 4063 are of an integrated structure, the rotating section 4061 is of a cylindrical structure, the screws 4062 are arranged at two ends of the rotating section 4061, the rotating directions of the screws 4062 at the two ends of the rotating section 4061 are opposite, and the nominal diameter, the pitch and the length are the same, the hexagonal prism 4063 is arranged at the other end of the first rotating rod 406, the screws 4062 at the two ends of the rotating section 4061 of the first rotating rod 406 are in threaded connection with a first clamping block 404, and the screws 4062 at the two ends of the rotating section 4061 of the second rotating rod 407 are in threaded connection with a second clamping block 405; when the fixed rectangle steel pipe 5 of operating personnel, can use the spanner to rotate the hexagonal prism 4063 on fixing base 4 and the lower fixing base 13, make the first grip block 404 that is located the rectangle steel pipe 5 outside and second grip block 405 move the same horizontal distance to the axis direction of the upwards fixing base 4, carry out the centre gripping of feeling relieved certainly to rectangle steel pipe 5, reduce the influence of the eccentricity error of rectangle steel pipe 5 to the experimental result accuracy.
Specifically, the first sliding groove 402 and the second sliding groove 403 are both dovetail groove structures, one end of the first clamping block 404 is slidably mounted inside the first sliding groove 402, and one end of the second clamping block 405 is slidably mounted inside the second sliding groove 403; the first sliding groove 402 and the second sliding groove 403 can provide limiting guide effects for the first clamping block 404 and the second clamping block 405, and clamping effects of the first clamping block 404 and the second clamping block 405 on the rectangular steel pipe 5 are improved.
Specifically, the longitudinal telescopic ruler 12 is vertically and fixedly installed on the inner bottom surface of the reaction frame 1, the longitudinal telescopic ruler 12 comprises an inner telescopic ruler 121, an outer sleeve 122, a screw hole 123, a scale mark 124, an inner guide rod 125 and a spring 126, the inner telescopic rule 121 is a square tube structure with two closed ends, the outer sleeve 122 is a square tube structure with a closed bottom end, the inner telescopic rule 121 is slidably mounted inside the outer sleeve 122, the vertical side of the inner telescopic rule 121 is provided with scale marks 124, the top end of the inner telescopic rule 121 is provided with an internal thread through hole, the bottom end of the inner telescopic rule 121 is provided with a through hole which is connected with the inner guide rod 125 in a sliding way, the number of the inner guide rods 125 is two, the inner guide rods 125 are vertically and fixedly installed on the inner bottom surface of the outer sleeve 122, a spring 126 is sleeved outside the inner guide rod 125 between the bottom surface of the inner telescopic rule 121 and the inner bottom surface of the outer sleeve 122; when the hydraulic jack 2 stretches and retracts to drive the upper hinge mechanism 3 and the upper fixing seat 4 to carry out bending test on the rectangular steel pipe 5, the longitudinal telescopic ruler 12 is driven by the second fixing rod 8 and the L-shaped seat 9 to stretch and retract synchronously with the hydraulic jack 2, and therefore the longitudinal deformation of the rectangular steel pipe 5 is measured.
Specifically, the measuring mechanism 11 includes a lower U-shaped seat 111, a clamping screw 112, a rotating handle 113, a U-shaped base 114, a screw 115, a transverse telescopic ruler 116, and a top joint 117, the transverse telescopic ruler 116 and the longitudinal telescopic ruler 12 have the same structure, one end of the transverse telescopic ruler 116 is fixedly installed on the inner side of the U-shaped base 114 through the screw 115, the other end of the transverse telescopic ruler 116 is fixedly connected with the top joint 117, one end of the U-shaped base 114 is fixedly connected with the side surface of the lower U-shaped seat 111 facing the rectangular steel pipe 5, the bottom of the lower U-shaped seat 111 is provided with a through hole for slidably connecting the guide rod 10, the top joint 117 includes a fixed block 1171, a square groove 1172, a rotating seat 1173, and a steel ball 1174, the square groove 1172 is provided on the side surface of the fixed block 1171 and is sleeved on the outer side surface of one end of the transverse telescopic ruler 116, the rotating seat 1173 is fixedly installed on the side surface of the fixed, a spherical groove structure is formed in one end, facing the rectangular steel pipe 5, of the rotating seat 1173, the steel ball 1174 is rotatably installed in the spherical groove formed in the rotating seat 1173, and the steel ball 1174 is rotatably connected with the vertical side face of the rectangular steel pipe 5; the lateral expansion and contraction ruler 116 installed in the measuring mechanism 11 on the adjacent side of the rectangular steel pipe 5 can measure the lateral deformation of the rectangular steel pipe 5.
Specifically, the guide rod 10 is vertically and fixedly installed on the inner bottom surface of the reaction frame 1, an internal thread through hole in threaded connection with a clamping screw 112 is formed in the side surface of the lower U-shaped seat 111, and a rotating handle 113 is fixedly connected to one end of the clamping screw 112; an operator can slidably adjust the height of the measuring mechanism 11 on the guide rod 10 to enable the top connector 117 to be located on the middle section of the rectangular steel pipe 5, and rotate the rotating handle 113 to enable the clamping screw 112 to translate to clamp the guide rod 10, so that the measuring mechanism 11 and the guide rod 10 are kept relatively fixed, and therefore the transverse deformation of the rectangular steel pipes 5 with different heights can be accurately measured.
Specifically, the using method of the device operates according to the following flow:
step S1, respectively sleeving the upper fixing seat 4 and the lower fixing seat 13 of the hinged support 302 on the upper end and the lower end of the rectangular steel pipe 5, rotating the hexagonal prism 4063 by using a wrench to enable the first clamping block 404 and the second clamping block 405 to horizontally move to clamp and fix the side surface of the rectangular steel pipe 5, completing the connection of the upper fixing seat 4, the lower fixing seat 13 and the rectangular steel pipe 5, and entering step S2;
step S2, the knife hinges 301 welded with the jack sleeves 15 are lifted in an upward sliding mode, the jack sleeves 15 are sleeved on push rods of hydraulic jacks 2, the rectangular steel pipes 5 are vertically placed on the inner side of a reaction frame 1, hinge bases 302 at the bottom ends of the lower fixing bases 13 are hinged and connected with the knife hinges 301 on the inner bottom surface of the reaction frame 1, then the hydraulic jacks 2 are controlled to be started to stretch, the push rods of the hydraulic jacks 2 drive the knife hinges 301 at the bottom ends of the jack sleeves 15 to move downwards and are hinged and connected with the knife hinges 301 at the top ends of the upper fixing bases 4, installation and fixation of the rectangular steel pipes 5 on the reaction frame 1 are completed, and the step S3 is entered; .
Step S3, rotating the rotating handles 113 on the two measuring mechanisms 11 to release the clamping screw 112 to clamp and fix the measuring mechanisms 11, then sliding the measuring mechanisms 11 to move the top joint 117 to the plane where the middle section of the rectangular steel pipe 5 is located, at this time, the steel balls 1174 in the two measuring mechanisms 11 are in rolling contact with the side faces of the rectangular steel pipe 5, the transverse telescopic ruler 116 generates elastic energy storage, at this time, a tester records the initial values of the scale marks 124 on the longitudinal telescopic ruler 12 and the two transverse telescopic rulers 116, then, the hydraulic jack 2 is started to perform bending test, the changed values of the scale marks 124 are recorded again after loading is finished, and the values recorded after loading is reduced by the values before loading is started to obtain the transverse and longitudinal deformation distances of the rectangular steel pipe 5.
The working principle and the using process of the invention are as follows: the upper fixing seat 4 welded with the hinged support 302 and the lower fixing seat 13 are respectively sleeved at the upper end and the lower end of the rectangular steel pipe 5, and a wrench is used for rotating the hexagonal prism 4063 to enable the first clamping block 404 and the second clamping block 405 to move towards the center of the upper fixing seat 4 on the first rotating rod 406 and the second rotating rod 407, so that the side surface of the rectangular steel pipe 5 is clamped and fixed;
the knife hinges 301 welded with the jack sleeves 15 are lifted up in an upward sliding manner, the jack sleeves 15 are sleeved on push rods of hydraulic jacks 2, the rectangular steel pipes 5 are vertically placed on the inner side of a reaction frame 1, hinge bases 302 at the bottom ends of the lower fixing bases 13 are hinged and connected with the knife hinges 301 on the inner bottom surface of the reaction frame 1, then the hydraulic jacks 2 are controlled to be started to stretch, the push rods of the hydraulic jacks 2 drive the knife hinges 301 at the bottom ends of the jack sleeves 15 to move downwards, and the knife hinges 301 are hinged and connected with the knife hinges 301 at the top ends of the upper fixing bases 4;
rotating handles 113 on the two measuring mechanisms 11 to enable the clamping screw 112 to move downwards to the outer side of the U-shaped seat 111, then sliding the measuring mechanisms 11 up and down to enable the top joint 117 to be adjusted to the plane where the middle section of the rectangular steel pipe 5 is located, at the moment, the steel balls 1174 in the two measuring mechanisms 11 are in rolling contact with the side face of the rectangular steel pipe 5, the transverse telescopic ruler 116 generates elastic energy storage, at the moment, a tester records initial values of the scale marks 124 on the longitudinal telescopic ruler 12 and the two transverse telescopic rulers 116, then, the hydraulic jack 2 is started to perform a bending test, after the rectangular steel pipe 5 is subjected to load and generates longitudinal and transverse deformation, the inner telescopic rulers 121 on the longitudinal telescopic ruler 12 and the transverse telescopic ruler 116 move towards the other end of the outer sleeve 122, the spring 126 is squeezed to enable the spring 126 to generate elastic energy storage, and after the loading is finished, the value of the changed scale marks 124 is recorded again, and subtracting the numerical value before the loading is started from the numerical value recorded after the loading is finished to obtain the transverse and longitudinal deformation distances of the rectangular steel pipe 5.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the 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. The experimental device for bending the steel member and the using method thereof are characterized in that: the device comprises a rectangular steel pipe (5), an upper fixing seat (4), a measuring mechanism (11) and a longitudinal telescopic ruler (12), wherein the upper end and the lower end of the rectangular steel pipe (5) are respectively connected with the upper fixing seat (4) and a lower fixing seat (13) in a clamping manner, the top end of the upper fixing seat (4) is welded with an upper hinge mechanism (3), the bottom end of the lower fixing seat (13) is welded with a lower hinge mechanism (14), the lower hinge mechanism (14) is fixedly installed on the inner bottom surface of a reaction frame (1), the top end of the upper hinge mechanism (3) is welded with a jack sleeve (15), the jack sleeve (15) is sleeved with a push rod connected with a hydraulic jack (2), the hydraulic jack (2) is fixedly installed at the top of the reaction frame (1), two adjacent vertical side surfaces of the upper hinge mechanism (3) are fixedly connected with an upper U-shaped seat (7) through a first fixing rod (6), go up the through-hole of sliding connection guide arm (10) seted up to the bottom of U type seat (7), slidable mounting has measuring mechanism (11) on guide arm (10), go up vertical side of articulated mechanism (3) opposite side and pass through second dead lever (8) fixedly connected with L type seat (9), the top of the vertical telescopic ruler (12) of L type seat (9) fixed connection.
2. An experimental facility and method of use for bending a steel member according to claim 1, wherein: go up hinge mechanism (3) and the structure size of lower hinge mechanism (14) the same, it includes sword hinge (301), free bearing (302) to go up hinge mechanism (3), go up the bottom of the top surface welding jack sleeve pipe (15) of sword hinge (301) in hinge mechanism (3), jack sleeve pipe (15) are round tubular structure, the articulated connection of sword hinge (301) in going up hinge mechanism (3) welds free bearing (302) on last fixing base (4) top, the interior bottom surface of sword hinge (301) welding reaction frame (1) in lower hinge mechanism (14), the bottom surface of fixing base (13) under free bearing (302) welding in lower hinge mechanism (14).
3. An experimental facility and method of use for bending a steel member according to claim 1, wherein: the structure size of going up fixing base (4) is the same with lower fixing base (13), go up fixing base (4) and include main seat (401), first spout (402), second spout (403), first grip block (404), second grip block (405), first bull stick (406), second bull stick (407), two first spouts (402) have been seted up to the terminal surface bilateral symmetry that main seat (401) and rectangle steel pipe (5) meet, two second spouts (403) have been seted up to the front and back symmetry, first bull stick (406) rotate and link up the left and right sides terminal surface of main seat (401), second bull stick (407) rotate and link up main seat (401) front and back terminal surface, first bull stick (406) are the same with second bull stick (407) structure, first bull stick (406) rotate and install on main seat (401) above second bull stick (407), first bull stick (406) include rotate section (4061), Screw rod (4062) and hexagonal prism (4063), section (4061), screw rod (4062) and hexagonal prism (4063) formula structure as an organic whole rotate, section (4061) is cylindrical structure rotates, screw rod (4062) sets up the both ends at section (4061) rotates, the opposite and nominal diameter of the rotation of screw rod (4062) at section (4061) both ends, moment of a thread, length are the same, hexagonal prism (4063) sets up the other end at first bull stick (406), screw rod (4062) threaded connection at section (4061) both ends of rotating of first bull stick (406) has first centre gripping piece (404), screw rod (4062) threaded connection at section (4061) both ends of rotating of second bull stick (407) has second centre gripping piece (405).
4. An experimental setup and method of use of a steel member being bent according to claim 3, characterized in that: the first sliding groove (402) and the second sliding groove (403) are both of dovetail groove structures, one end of the first clamping block (404) is slidably mounted on the inner side of the first sliding groove (402), and one end of the second clamping block (405) is slidably mounted on the inner side of the second sliding groove (403).
5. An experimental facility and method of use for bending a steel member according to claim 1, wherein: the longitudinal telescopic ruler (12) is vertically and fixedly installed on the inner bottom surface of the reaction frame (1), the longitudinal telescopic ruler (12) comprises an inner telescopic ruler (121), an outer sleeve (122), a screw hole (123), scale marks (124), inner guide rods (125) and a spring (126), the inner telescopic ruler (121) is of a square tube structure with two closed ends, the outer sleeve (122) is of a square tube structure with a closed bottom end, the inner telescopic ruler (121) is installed on the inner side of the outer sleeve (122) in a sliding mode, the scale marks (124) are arranged on the vertical side surface of the inner telescopic ruler (121), an internal thread through hole is formed in the top end of the inner telescopic ruler (121), the bottom end of the inner telescopic ruler (121) is provided with a through hole connected with the inner guide rods (125) in a sliding mode, the number of the inner guide rods (125) is two, and the inner guide rods (125) are vertically and fixedly installed on the inner bottom surface of the outer sleeve (122, a spring (126) is sleeved on the outer side of an inner guide rod (125) between the bottom surface of the inner telescopic ruler (121) and the inner bottom surface of the outer sleeve (122).
6. An experimental facility and method of use for bending a steel member according to claim 1, wherein: the measuring mechanism (11) comprises a lower U-shaped seat (111), a clamping screw rod (112), a rotating handle (113), a U-shaped base (114), a screw (115), a transverse telescopic ruler (116) and a top joint (117), the transverse telescopic ruler (116) is identical to the longitudinal telescopic ruler (12) in structure, one end of the transverse telescopic ruler (116) is fixedly installed on the inner side of the U-shaped base (114) through the screw (115), the other end of the transverse telescopic ruler (116) is fixedly connected with the top joint (117), one end of the U-shaped base (114) is fixedly connected with the side face of the lower U-shaped seat (111) facing the rectangular steel pipe (5), a through hole in sliding connection with a guide rod (10) is formed in the bottom of the lower U-shaped seat (111), the top joint (117) comprises a fixed block (1171), a square groove (1172), a rotating seat (1173) and a steel ball (1174), the square groove (1172) is formed in the side face of the fixed block (1171) and the outer side face of one end of the The steel ball fixing device is characterized in that the rotating seat (1173) is fixedly arranged on the side face of the fixing block (1171) opposite to the square groove (1172), a spherical groove structure is formed in one end, facing the rectangular steel pipe (5), of the rotating seat (1173), the steel ball (1174) is rotatably arranged in the spherical groove formed in the rotating seat (1173), and the steel ball (1174) is rotatably connected with the vertical side face of the rectangular steel pipe (5).
7. An experimental setup and method of use of a steel member according to claim 1 or 6, characterized in that: the guide rod (10) is vertically and fixedly installed on the inner bottom surface of the reaction frame (1), an internal thread through hole in threaded connection with a clamping screw rod (112) is formed in the side surface of the lower U-shaped seat (111), and a rotating handle (113) is fixedly connected to one end of the clamping screw rod (112).
8. An experimental facility and method of use for bending a steel member according to claim 1, wherein: the using method of the device operates according to the following procedures:
s1, respectively sleeving an upper fixing seat (4) and a lower fixing seat (13) at the upper end and the lower end of a rectangular steel pipe (5), rotating a hexagonal prism (4063) by using a wrench to enable a first clamping block (404) and a second clamping block (405) to horizontally move to clamp and fix the side face of the rectangular steel pipe (5), completing the connection of the upper fixing seat (4), the lower fixing seat (13) and the rectangular steel pipe (5), and entering S2;
s2, lifting the cutter hinges (301) welded with the jack sleeves (15) in an upward sliding mode, enabling the jack sleeves (15) to be sleeved on push rods of hydraulic jacks (2), vertically placing the rectangular steel pipes (5) into the inner side of a reaction frame (1), enabling hinge seats (302) at the bottom ends of lower fixing seats (13) to be hinged to the cutter hinges (301) on the inner bottom surface of the reaction frame (1), then controlling and starting the hydraulic jacks (2) to stretch, enabling the push rods of the hydraulic jacks (2) to drive the cutter hinges (301) at the bottom ends of the jack sleeves (15) to move downwards and to be hinged to the cutter hinges (301) at the top ends of upper fixing seats (4), completing installation and fixation of the rectangular steel pipes (5) on the reaction frame (1), and entering step S3;
step S3, rotating the rotating handles (113) on the two measuring mechanisms (11) to release the clamping screw (112) to clamp and fix the measuring mechanisms (11), then the measuring mechanisms (11) are slid to enable the jacking joint (117) to move to the plane where the middle section of the rectangular steel pipe (5) is located, at the moment, the steel balls (1174) in the two measuring mechanisms (11) are in rolling contact with the side face of the rectangular steel pipe (5), and the transverse telescopic ruler (116) generates elastic energy storage, at the moment, a tester records the initial numerical values of the scale marks (124) on the longitudinal telescopic ruler (12) and the two transverse telescopic rulers (116), then starts the hydraulic jack (2) to perform a bending test, and records the numerical value of the changed scale mark (124) again after the loading is finished, and subtracting the numerical value before the loading is started from the numerical value recorded after the loading is finished to obtain the transverse and longitudinal deformation distances of the rectangular steel pipe (5).
CN202011632157.8A 2020-12-31 2020-12-31 Experimental device for bending steel member and use method Withdrawn CN112414850A (en)

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Application Number Priority Date Filing Date Title
CN202011632157.8A CN112414850A (en) 2020-12-31 2020-12-31 Experimental device for bending steel member and use method

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Application Number Priority Date Filing Date Title
CN202011632157.8A CN112414850A (en) 2020-12-31 2020-12-31 Experimental device for bending steel member and use method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112782002A (en) * 2021-03-01 2021-05-11 西南石油大学 Metal casing deformation testing device in well cementation cement slurry coagulation waiting process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112782002A (en) * 2021-03-01 2021-05-11 西南石油大学 Metal casing deformation testing device in well cementation cement slurry coagulation waiting process

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Application publication date: 20210226