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CN-122016522-A - T-shaped joint drop hammer impact test device and impact test method thereof

CN122016522ACN 122016522 ACN122016522 ACN 122016522ACN-122016522-A

Abstract

The invention discloses a T-shaped joint drop hammer impact test device and an impact test method thereof, wherein the device comprises a frame body, a fixing base is arranged at the bottom of the inner part of the frame body, a T-shaped joint sample is connected to the fixing base, an impact assembly, a locking assembly and a lifting assembly are arranged above the fixing base, the lifting assembly is connected with the impact assembly through the locking assembly, the locking assembly is provided with a locking position and a release position, when the locking assembly is in the locking position, the lifting assembly is in locking linkage with the impact assembly, when the locking assembly is in the release position, the impact assembly breaks away from the lifting assembly to impact, an acceleration sensor and a stress sensor are arranged on the impact assembly, and signal output ends of the acceleration sensor and the stress sensor are connected with signal input ends of a PLC.

Inventors

  • CAI HONGNENG
  • MA SIJIE
  • Lv huan
  • SHI YUHANG

Assignees

  • 西安交通大学

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. A T-shaped joint drop hammer impact test device is characterized in that a fixing base (6) is arranged at the bottom of the inside of the frame body (1), a T-shaped joint sample (5) is connected to the fixing base (6), an impact component (4), a locking component (3) and a lifting component (2) which are arranged in the frame body (1) are sequentially arranged above the T-shaped joint sample (5), the lifting component (2) is connected with the impact component (4) through the locking component (3), the locking component (3) is provided with a locking position and a release position, when the locking component (3) is located at the locking position, the lifting component (2) is in locking linkage with the impact component (4), when the locking component (3) is located at the release position, the impact component (4) is separated from the lifting component (2) to be impacted, and an acceleration sensor and a stress sensor are arranged on the impact component (4), and signal output ends of the acceleration sensor and the stress sensor are connected with a signal input end of a PLC.
  2. 2. The T-joint drop hammer impact test device according to claim 1, wherein the frame body (1) comprises two smooth vertical guide rods (8) which are arranged in parallel, and the top ends of the two guide rods (8) are fixedly connected through a connecting plate (7).
  3. 3. The T-shaped joint drop hammer impact test device is characterized in that the lifting assembly (2) comprises a first protection box (9) arranged at the bottom of the connecting plate (7), a lifting motor (10) and a winding drum (11) are arranged in the first protection box (9), a power output shaft of the lifting motor (10) is connected with a driving wheel (12), one side surface of the winding drum (11) is connected with a driven wheel (13), a transmission belt (14) is sleeved between the driving wheel (12) and the driven wheel (13), a cable chain (15) is diffracted on the winding drum (11), and a signal output end of a PLC (programmable logic controller) is connected with a signal input end of the lifting motor (10).
  4. 4. The T-joint drop hammer impact test device is characterized in that the locking assembly (3) comprises a second protection box (16) connected with a cable chain (15), a locking motor (17) is arranged in the second protection box (16), a power output shaft of the locking motor (17) is connected with a worm (19) through a coupler (18), turbines meshed with the worm (19) are symmetrically arranged on two sides of the worm (19), namely a first turbine (21) and a second turbine (22), and L-shaped catches (23) with locking positions and releasing positions are arranged on the first turbine (21) and the second turbine (22).
  5. 5. The T-joint drop hammer impact test device according to claim 1, wherein the impact assembly (4) comprises a retaining ring (24), when the L-shaped lock catch (23) is located at a locking position, the L-shaped lock catch (23) is locked with the retaining ring (24), when the L-shaped lock catch (23) is located at a releasing position, the L-shaped lock catch (23) is separated from the retaining ring (24), the retaining ring (24) is connected with a balancing weight (26) through a short screw (25), the balancing weight (26) is connected with a drop hammer plate (28) through a long screw (27), guide through holes (29) are formed in two ends of the drop hammer plate (28), a guide rod (8) of the frame body (1) is slidably connected with the drop hammer plate (28) through the guide through holes (29), at least two mounting positions are arranged at the bottom of the drop hammer plate (28), and the drop hammer plate (28) is detachably connected with two symmetrically arranged impact hammerheads (31) through fasteners.
  6. 6. The T-joint drop hammer impact test device according to claim 5, wherein the impact hammer head (31) is of a longitudinally extending rod-shaped structure and sequentially comprises a connecting section (32), a transition section (33) and a working rod section (34) from top to bottom, the connecting section (32) is arranged in an installation position on a drop hammer plate (28), the top end of the transition section (33) is connected with the connecting section (32), the bottom end of the transition section is smoothly connected to the working rod section (34) through a reducing transition, and the working rod section (34) is of a flat strip-shaped plate-shaped structure and is processed into an arc shape.
  7. 7. The T-joint drop hammer impact test device according to claim 1, wherein the T-joint sample (5) comprises a wing plate (35), the bottom end of the wing plate (35) is welded to the middle part of the web plate (36), and a flat plate (38) is arranged at the top end of the wing plate (35).
  8. 8. The T-joint drop hammer impact test device according to claim 1, wherein the fixing base (6) is of a symmetrical split type triangular table structure, the split type triangular table structure comprises a first base (41) and a second base (42) which are identical in structure and symmetrical, the first base (41) or the second base (42) comprises a clamping plate (43), the bottom end of the clamping plate (43) is connected with a clamping seat (44), a supporting block (45) is arranged in the clamping seat (44) and extends out of the clamping seat (44), the clamping plate (43) is connected with a flat plate (38) of a T-joint sample (5), and the top of the supporting block (45) is connected with a web plate (36) of the T-joint sample (5).
  9. 9. The T-joint drop impact test device according to claim 8, wherein rubber buffer blocks positioned between two supporting blocks (45) are arranged inside the two clamping seats (44).
  10. 10. A T-shaped joint drop hammer impact test method is characterized by comprising the steps of installing an acceleration sensor and a stress sensor on an impact assembly (4), lifting the impact assembly (4) to a preset test height, releasing the impact assembly (4) to enable the impact assembly to freely fall, enabling an impact hammer head (31) of the impact assembly (4) to freely fall and apply force to a web plate (36) of a T-shaped joint sample (5) fixed below, applying impact load to the T-shaped joint sample (5), and calculating impact energy when the T-shaped joint sample (5) is deformed or broken after being impacted by adjusting the integral mass and lifting height of the impact assembly (4) and the spans of two impact hammer heads (31).

Description

T-shaped joint drop hammer impact test device and impact test method thereof Technical Field The invention belongs to the technical field of impact tests, and particularly relates to a T-shaped joint drop hammer impact test device and an impact test method thereof. Background The T-shaped joint is a key connection part in a large-scale oil tank, and when the oil tank is subjected to arc fault explosion, the oil tank is easily damaged due to bearing huge explosion impact load, and even the oil tank is damaged to bring huge economic loss and potential safety hazard. Therefore, the impact performance of the T-joint is important to the safety performance of large tanks. The performances of T-shaped joints obtained by welding with different welding processes and parameters are also greatly different. Thus, it is necessary to evaluate the impact properties of a T-joint, however, because of the different stresses of the T-joint in different structural applications and because of its special construction, it is difficult to evaluate a T-joint as simply as it is to evaluate the impact properties of a butt joint. At present, an existing T-shaped joint drop hammer impact test device (bulletin No. CN 114878370A) comprises an impact machine of a frame structure, impact components are arranged on the inner side of the impact machine in a vertical sliding mode, fixing mechanisms are arranged under the impact components at intervals, the impact components are pulled by a cable chain on the inner top surface of the impact machine, and the impact components are driven to freely descend through a control system of the impact machine. However, the test device can only perform tensile impact test on the wing plate of the T-shaped joint, and cannot perform impact test on the web plate of the T-shaped joint. When the oil tank is subjected to arc fault explosion, the wing plates and the web plates of the T-shaped connector can bear huge explosion impact load to be damaged. It is therefore necessary to design a suitable test apparatus to evaluate the impact properties of the T-joint web. Disclosure of Invention In order to solve the problems in the prior art, the invention aims to provide a T-shaped joint drop hammer impact test device and an impact test method thereof, wherein the total potential energy of an impact test is changed by adjusting the height of an impact assembly and the weight of a balancing weight, the impact load is converted into an impact load to be loaded on a web plate of a T-shaped joint sample, the web plate of the T-shaped joint sample is impacted, meanwhile, as a wing plate of the T-shaped joint sample is fixed, impact hammerheads can also apply impact tensile load to a welding seam of the T-shaped joint, drop hammer impact tests of different spans are realized by adjusting the installation positions of two impact hammerheads on a drop hammer plate, and high-speed impact tests under different impact loads can be realized on different positions of the web plate of the complete T-shaped joint, so that the high-speed impact resistance of the T-shaped joint and the strength difference of different welding process parameters can be evaluated, and a test method for optimizing the T-shaped joint is provided for some devices needing to bear the high-speed impact, and therefore whether the impact performance of the T-shaped joint and the corresponding welding process meet the actual industrial requirements is tested. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: A T-shaped joint drop hammer impact test device comprises a frame body 1, wherein a fixing base 6 is arranged at the bottom of the inside of the frame body 1, a T-shaped joint sample 5 is connected to the fixing base 6, an impact assembly 4, a locking assembly 3 and a lifting assembly 2 which are arranged in the frame body 1 are sequentially arranged above the T-shaped joint sample 5, the lifting assembly 2 is connected with the impact assembly 4 through the locking assembly 3, the locking assembly 3 is provided with a locking position and a release position, when the locking assembly 3 is located at the locking position, the lifting assembly 2 is in locking linkage with the impact assembly 4, when the locking assembly 3 is located at the release position, the impact assembly 4 is separated from the lifting assembly 2 to impact, an acceleration sensor and a stress sensor are arranged on the impact assembly 4, and signal output ends of the acceleration sensor and the stress sensor are connected with a signal input end of a PLC. The frame body 1 comprises two smooth vertical guide rods 8 which are arranged in parallel, and the top ends of the two guide rods 8 are fixedly connected through a connecting plate 7. The lifting assembly 2 comprises a first protection box 9 arranged at the bottom of the connecting plate 7, a lifting motor 10 and a winding drum 11 are arranged in the first protection box 9, a powe