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CN-121595328-B - Device for steel pipe drawing test

CN121595328BCN 121595328 BCN121595328 BCN 121595328BCN-121595328-B

Abstract

The invention relates to the field of drawing test devices, in particular to a device for a steel pipe drawing test. The device comprises a mounting seat, an outer side plate, an inner side plate, a drawing test assembly and a double-head drawing force application assembly. The two groups of outer side plates are respectively arranged on the two side rotary driving frames, the two groups of inner side plates are rotatably arranged on the two groups of outer side plates, the plurality of groups of drawing test assemblies are transversely arranged between the two groups of inner side plates, the end part of the drawing test channel is provided with a spraying section, the middle part of the drawing test channel is provided with an imaging monitoring section, and the plurality of groups of double-head drawing force application assemblies are transversely and penetratingly arranged on the two groups of outer side plates. According to the invention, the stations are switched through the rotation of the outer side plate and the inner side plate, the environment control and the on-line monitoring of the drawing test assembly and the synchronous and accurate loading of the double-head drawing force application assembly are closely linked, so that the batch automatic operation of the steel pipe drawing test is realized, and the remarkable progress is achieved in the aspects of clamping precision, stress state control, deformation measurement accuracy and the like.

Inventors

  • WU RENJIE
  • LIU XUGANG
  • Si Jingxian
  • ZHAO JINGUI
  • YANG YANG
  • He Bangji
  • LI FANG

Assignees

  • 中国水利水电第六工程局有限公司

Dates

Publication Date
20260508
Application Date
20260115

Claims (9)

  1. 1. An apparatus for steel pipe drawing test, comprising: the device comprises a mounting seat (1), wherein two sides of the mounting seat (1) are provided with an upper material inlet and a lower material inlet (101) which are opposite in position and a rotary driving frame (2) positioned below the upper material inlet and the lower material inlet (101) at two sides; the two groups of outer side plates (3) are respectively arranged on the rotating ends of the rotating driving frames (2) at the two sides in parallel, and a plurality of groups of through grooves (301) which are in one-to-one correspondence are arranged around the rotating ends, and each group of through grooves (301) is respectively provided with a feeding station and a discharging station and a drawing station; the inner side plates (4) are arranged at opposite ends of the two groups of outer side plates (3) in a one-to-one correspondence manner, and each group of inner side plates (4) is provided with a circle of through holes (401) which are in one-to-one correspondence with the through grooves (301); The steel tube drawing device comprises drawing test components (5), a plurality of groups of drawing test components (5) and a plurality of groups of drawing test components, wherein the drawing test components (5) are transversely arranged between two groups of inner side plates (4), drawing test channels are arranged in each group of drawing test components (5), two ends of each drawing test channel are respectively communicated with through holes (401) on two sides in a one-to-one correspondence manner, spraying sections are arranged at the end parts of the drawing test channels, a layer of random black-white speckle patterns are sprayed on the steel tube to be tested to generate digital fingerprints, imaging monitoring sections are arranged at the middle parts of the drawing test channels, and shooting is carried out on the image deformation process in the drawing test to acquire deformation data; The double-end drawing force application assemblies (6) are transversely penetrated on the two groups of outer side plates (3), and two ends of each group of double-end drawing force application assemblies (6) extend out of the outer side plates (3) and are respectively provided with drawing ends which are in one-to-one correspondence with the drawing stations, wherein a first connecting piece (7) connected with the inner threaded end of the steel pipe is arranged at one drawing end of one side, and a second connecting piece (8) connected with the outer threaded end of the steel pipe is arranged at the other drawing end of the other side; When a drawing test is carried out on the steel pipe, the first connecting piece (7) and the second connecting piece (8) are respectively connected with two ends of the steel pipe, and then the drawing ends of the two ends are synchronously controlled to apply incremental axial tension to the two ends of the steel pipe at a preset loading rate; when the tensile force reaches a preset threshold value, switching to a force maintaining mode to enable the tensile force applied to the steel pipe to be stable, and acquiring deformation data by the imaging monitoring section; The drawing test assembly (5) comprises a drawing test tube (501) with two ends communicated with corresponding side through holes (401), a drawing test channel is arranged in the drawing test tube (501), a spraying part is arranged at a position, corresponding to a spraying section, of the drawing test tube (501), and an imaging monitoring part (504) is arranged at a position, corresponding to an imaging monitoring section, of the drawing test tube (501).
  2. 2. The device for steel pipe drawing test according to claim 1, wherein the through groove (301) is provided with an arc shape, and the loading and unloading station and the drawing station are respectively arranged at two ends of the arc-shaped section of the through groove (301); the arc-shaped structure of the through groove (301) is matched with the rotation track of the through hole (401).
  3. 3. The device for steel pipe drawing test according to claim 1, wherein the inner side plate (4) is annular, a circle of toothed ring (403) is arranged on the outer wall of the ring, and the gear (404) is rotatably arranged on one side of the inner side plate (4) and is meshed with the toothed ring (403); The through hole (401) is arranged along the ring body, and a first moving part (402) acting on the steel pipe is arranged in the through hole (401).
  4. 4. A device for steel pipe drawing test according to claim 3, characterized in that the first moving member (402) comprises a mounting cylinder (40201) positioned in the through hole (401), a circle of electrically controlled telescopic lifting tables (40202) are arranged on the inner wall of the mounting cylinder (40201), and a plurality of groups of lifting tables (40202) are alternately provided with a first moving head (40203) and a second moving head (40204); the first moving head (40203) and the second moving head (40204) are provided with electric moving wheels with staggered rotating directions, the first moving head (40203) drives the steel pipe to rotate along the length direction, and the second moving head (40204) drives the steel pipe to rotate along the circumferential direction; the upper and lower feed opening (101) is arranged on the rotating track of the through hole (401), and a moving part II which has the same structure as the moving part I (402) is arranged in the upper and lower feed opening (101).
  5. 5. The device for steel pipe drawing test according to claim 1, wherein the spray member comprises a spray rack (502) at the mouth of the drawing test pipe (501), the spray rack (502) being in communication with an external paint storage device through the pipe (503); The spraying frame (502) is arranged in a ring shape, and the spray heads are arranged along the circumference of the spraying frame.
  6. 6. The device for steel pipe drawing test according to claim 1, wherein the imaging monitoring pieces (504) are provided in a plurality of groups, each group of imaging monitoring pieces (504) comprises an imaging monitoring sleeve (50401) horizontally moving in the drawing test channel along the length direction of the drawing test pipe (501), an annular track (50403) positioned in the middle and brightness adjusting areas (50402) positioned on two sides of the annular track (50403) are arranged on the inner wall of the imaging monitoring sleeve (50401), the imaging device (50404) moves in a circular track by sliding along the annular track (50403), and the brightness adjusting areas (50402) are provided with LED lamps along the annular track.
  7. 7. A device for steel tube drawing test according to claim 3, characterized in that the double-headed drawing force application assembly (6) comprises a plurality of sets of double-headed force applicators (601) arranged between the two sets of outer plates (3) and drawing force application frames (602) arranged outside the two sets of outer plates (3); The double-end force applicators (601) of the inner ring are arranged along the ring inner hole of the inner side plate (4), and the double-end force applicators (601) of the outer ring are arranged along the ring periphery of the inner side plate (4); the drawing force application frame (602) is a drawing end and comprises a frame body (60201), the position of the frame body (60201) corresponds to the drawing stations one by one, two ends of the frame body are respectively connected with the force application ends of the two groups of double-head force application devices (601) of the inner ring and the outer ring in pairs through fixing frames (60202), and an installation table (60203) connected with the first connecting piece (7) or the second connecting piece (8) is arranged in the middle of the frame body (60201).
  8. 8. The device for steel pipe drawing test according to claim 7, wherein the first connecting piece (7) comprises a first rotating seat (702) which is rotationally connected with the mounting table (60203), a threaded column (705) which is in threaded fit with the inner threaded end of the steel pipe is arranged in the center of the first rotating seat (702), a limit sleeve (701) which is in threaded fit with the outer wall of the steel pipe is arranged on the periphery of the first rotating seat (702), an annular steel pipe connecting cavity I is formed between the limit sleeve (701) and the threaded column (705), and a second limit cylinder I (703) is sleeved outside the limit sleeve (701); The first secondary limiting cylinder (703) is in threaded fit with the limiting sleeve (701), and an anti-slip ring (704) matched with the outer wall of the steel pipe is arranged on the cylinder mouth of the first secondary limiting cylinder (703).
  9. 9. The device for steel pipe drawing test according to claim 7, wherein the second connecting piece (8) comprises a second rotating seat (802) which is rotationally connected with the mounting table (60203), a limiting column (805) which is matched with the inner wall of the steel pipe is arranged in the center of the second rotating seat (802), a threaded sleeve (801) which is in threaded fit with the outer threaded end of the steel pipe is arranged on the periphery of the second rotating seat (802), an annular steel pipe connecting cavity II is formed between the threaded sleeve (801) and the limiting column (805), and a second limiting cylinder II (803) is arranged outside the threaded sleeve (801); the second limiting cylinder (803) is in threaded fit with the threaded sleeve (801), and an anti-slip ring (804) matched with the outer wall of the steel pipe is arranged on the cylinder mouth of the second limiting cylinder (803).

Description

Device for steel pipe drawing test Technical Field The invention relates to the field of drawing test devices, in particular to a device for a steel pipe drawing test. Background The conditions of drill sticking, hole collapse, incapability of forming holes and the like often occur in the construction of side slope anchor bar piles and mortar anchor rod drilling, and the condition of drill sticking also occurs when workers try self-advancing anchor rod construction. In order to ensure the stability of the side slope, workers replace the side slope anchor rods and the anchor bar piles with steel flower pipes for construction, and the constructed steel flower pipes are not pulled out to form the condition that the steel flower pipes replace the anchor rods. And in the initial stage of construction, the anchor rod is subjected to a drawing test of the steel floral tube according to 3% of the number of the working anchor rods. The clamping mode of the traditional steel pipe drawing test device is difficult to reliably adapt to internal and external thread structures with different ends of a steel pipe, additional stress is easy to introduce to cause data distortion, manual single serial test efficiency is low, the aging requirement of engineering batch sampling inspection cannot be met, the deformation acquisition means (such as an extensometer) relying on local point measurement is difficult to capture complex strain distribution of a thread area and the whole field of a pipe body, the automation degree of a test process is low, sample preparation, clamping, loading and measuring links are dependent on manpower, data consistency and comparability are poor, cooperative control of sample surface pretreatment quality and a test imaging environment is lacked, and the application effect of a high-precision full-field optical measurement method (such as a digital image correlation method) is limited. Therefore, there is a need for a device for steel tube drawing tests that can achieve efficient, accurate, automated batch testing. Disclosure of Invention Aiming at the problems in the background art, the device for the steel pipe drawing test is provided, station switching is carried out through rotation of the outer side plate and the inner side plate, the environment control and the on-line monitoring of the drawing test assembly and the synchronous accurate loading of the double-head drawing force application assembly are closely linked, so that batch automatic operation of the steel pipe drawing test is realized, and remarkable progress is made in the aspects of clamping precision, stress state control, deformation measurement accuracy and the like. The invention provides a device for a steel pipe drawing test, which comprises a mounting seat, an outer side plate, an inner side plate, a drawing test assembly and a double-head drawing force application assembly. The two sides of the mounting seat are provided with upper and lower feed inlets which are opposite in position, and the rotary driving frames are positioned below the upper and lower feed inlets on the two sides; the two groups of outer side plates are respectively arranged on the rotating ends of the rotating driving frames at the two sides in parallel, and a plurality of groups of through grooves which correspond to each other one by one are arranged around the rotating ends; each group of through grooves is respectively provided with a loading and unloading station and a drawing station; the steel tube drawing device comprises two groups of inner side plates, a plurality of groups of drawing test components, a plurality of groups of drawing test channels, a plurality of groups of imaging monitoring sections, a plurality of groups of double-head drawing force application components, a steel tube drawing device and a drawing device, wherein the two groups of inner side plates are arranged at opposite ends of the two groups of outer side plates in a one-to-one correspondence manner, the two groups of inner side plates are respectively provided with a drawing test channel in one-to-one correspondence manner, the two ends of the drawing test channel are respectively communicated with the through holes at the two sides in one-to-one correspondence manner, a spraying section is arranged at the end of the drawing test channel, a layer of random black-white speckle pattern is sprayed on the steel tube to be tested, a digital fingerprint is generated, an imaging monitoring section is arranged at the middle of the drawing test channel, an image deformation process in the drawing test is shot, deformation data is acquired, the drawing device is transversely arranged at the two groups of the outer side plates, the two groups of the double-head drawing force application components extend out of the outer side plate through the inner side, and are respectively provided with drawing ends corresponding to the drawing station, one to the drawing device, one drawing ends