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CN-224231519-U - Reverse bending fatigue testing device for prestressed tendons

CN224231519UCN 224231519 UCN224231519 UCN 224231519UCN-224231519-U

Abstract

The utility model relates to the technical field of steel bar testing and discloses a prestressed reinforcement reverse bending fatigue testing device which comprises a base, wherein a movable frame is movably arranged on the top side of the base, a connecting rod is arranged on the right side of the movable frame, a placing table is fixedly arranged on the top side of the movable frame, a limiting seat is movably arranged on the top side of the placing table, a guide frame is movably arranged on the top side of the base, and a blocking seat is fixedly arranged on the top side of the guide frame. According to the utility model, in the bending fatigue test process, the two ends of the steel bar can be tilted by a certain extent, and at the moment, the two ends of the steel bar are clamped with the inclined grooves at the bottom side of the limiting seat, so that the limiting seat is pushed to move when the two ends of the steel bar are continuously tilted in the test process, the steel bar is limited by generating a reaction force through the fastening spring in the process, and meanwhile, the movable frame of the placing table is pulled to move, so that the test stability is improved, the steel bar is prevented from being ejected, and the test safety is further improved.

Inventors

  • Zu Guorui
  • ZHANG QI

Assignees

  • 青岛交科检测有限公司

Dates

Publication Date
20260512
Application Date
20250528

Claims (6)

  1. 1. The device for testing reverse bending fatigue of the prestressed tendons comprises a base (1) and is characterized in that a movable frame (2) is movably arranged on the top side of the base (1), a connecting rod (3) is arranged on the right side of the movable frame (2), a placing table (4) is fixedly arranged on the top side of the movable frame (2), a limiting seat (5) is movably arranged on the top side of the placing table (4), a guide frame (6) is movably arranged on the top side of the base (1), a blocking seat (7) is fixedly arranged on the top side of the guide frame (6), a support frame (8) is fixedly arranged on the top side of the base (1), a cylinder (9) is arranged on the top side of the support frame (8), a pressing block (10) is fixedly arranged at the driving end of the cylinder (9), and a rubber clamping seat (11) is arranged on the bottom side of the pressing block (10).
  2. 2. The device for testing reverse bending fatigue of the prestressed tendons is characterized in that sliding rails (101) are fixedly arranged on the top side of the base (1), two sliding rails (101) are respectively arranged in a group, two groups are totally arranged, side plates (102) are respectively fixedly arranged at the left end and the right end of the top side of the base (1), and a first positioning hole (103) is formed in the right side of the side plate (102).
  3. 3. The device for testing reverse bending fatigue of the prestressed tendons is characterized in that sliding seats (201) are fixedly arranged at two ends of the bottom side of the movable frame (2) respectively, the sliding seats (201) are movably arranged on the outer sides of sliding rails (101), second positioning holes (202) are formed in the left side of the movable frame (2), nuts (301) are connected to one end, close to the baffle seat (7), of the connecting rod (3) through threads, and reset springs (302) are sleeved on the outer sides, far away from one end of the baffle seat (7), of the connecting rod (3).
  4. 4. The device for testing reverse bending fatigue of the prestressed tendons according to claim 1, wherein the top side of the placing table (4) is provided with a first placing groove (401), two ends of the top side of the placing table (4) are respectively provided with a sliding groove (402) and a baffle (403), the sliding groove (402) and the baffle (403) are in a group, and four groups are arranged in total.
  5. 5. The device for testing reverse bending fatigue of a tendon according to claim 4, wherein a movable rod (502) is fixedly arranged on one side of the limit seat (5) close to the baffle plate (403), a fastening spring (5021) is arranged between the movable rod (502) and the baffle plate (403), and a chute (501) is arranged on the bottom side of the limit seat (5).
  6. 6. The device for testing reverse bending fatigue of the prestressed tendons is characterized in that guide rods (601) are fixedly installed at four corners of the bottom side of the guide frame (6), buffer springs (602) are arranged between the lower ends of the guide rods (601) and the base (1), second mounting grooves (701) are formed in the top side of the baffle seat (7), and the size and shape of the second mounting grooves (701) are matched with those of the first mounting grooves (401).

Description

Reverse bending fatigue testing device for prestressed tendons Technical Field The utility model relates to the technical field of steel bar testing, in particular to a device for testing reverse bending fatigue of a prestressed reinforcement. Background The steel bar reverse bending test machine is a process device for carrying out cold bending test and plane reverse bending test on steel bars, and comprises a frame, a workbench, a working disc, a speed reducer, a pressing device, an electric control box and the like, and has the characteristics of compact structure, simplicity in operation, large bearing capacity, stability in running, low noise, visual bending angle display, safety, reliability, convenience in maintenance and the like. But at present, in the process of using the reverse bending test machine for the steel bars, the steel bars are usually placed on the top side of a workbench and then are tested through pressing block extrusion, the steel bars can slide on the inner side of a groove on the top side of the workbench when being bent in the test process, the steel bars are easy to pop out, the safety is poor, and when the middle part of the steel bars are bent and stressed, the steel bars are easy to rotate, the test precision is influenced, and the stability is poor. Disclosure of utility model (One) solving the technical problems Aiming at the defects of the prior art, the utility model provides a prestressed reinforcement reverse bending fatigue testing device which has the advantages of limiting effect of the reinforcing steel bars, avoiding popup, improving the use safety, along with stable structure, ensuring that the reinforcing steel bars are not easy to rotate in the test and improving the testing precision, and solves the technical problems. (II) technical scheme The technical scheme is that the prestress rib reverse bending fatigue testing device comprises a base, wherein a movable frame is movably arranged on the top side of the base, a connecting rod is arranged on the right side of the movable frame, a placing table is fixedly arranged on the top side of the movable frame, a limiting seat is movably arranged on the top side of the placing table, a guide frame is movably arranged on the top side of the base, a blocking seat is fixedly arranged on the top side of the guide frame, a supporting frame is fixedly arranged on the top side of the base, an air cylinder is arranged on the top side of the supporting frame, a pressing block is fixedly arranged at the driving end of the air cylinder, and a rubber clamping seat is arranged on the bottom side of the pressing block. Preferably, the top side of base fixed mounting has the slide rail, the slide rail uses two to be a set of respectively, is provided with two sets of altogether, the both ends are fixed mounting respectively has the curb plate about the base top side, the locating hole No. one has been seted up on the right side of curb plate. Through above-mentioned technical scheme, under the effect of slide rail, stability and smoothness when being favorable to improving the movable frame and remove, under the effect of curb plate moreover, make things convenient for reset spring to produce the reaction force, and then conveniently test and accomplish the back movable frame and reset. Preferably, the both ends of movable frame bottom side are fixed mounting respectively has the slide, slide movable mounting is in the outside of slide rail, just No. two locating holes have been seted up in the left side of movable frame, the one end that is close to the fender seat of connecting rod has the nut through threaded connection, the connecting rod has cup jointed reset spring in keeping away from the outside of fender seat one end. Through above-mentioned technical scheme, under the effect of No. two locating holes and locating hole, convenient quick location installation connecting rod, through after tearing down the nut down simultaneously, convenient quick dismantlement is decomposed, improves the use convenience. Preferably, the top side of the placing table is provided with a first placing groove, two ends of the top side of the placing table are respectively provided with a sliding groove and a baffle, the sliding grooves and the baffles are in one group, and four groups are arranged in total. Through above-mentioned technical scheme, under the effect of a standing groove, conveniently place the test reinforcing bar, under two sets of spouts effect that correspond moreover, be favorable to improving the stability when spacing seat removes, through the baffle simultaneously, further improve the steadiness of spacing seat. Preferably, a movable rod is fixedly arranged on one side, close to the baffle, of the limiting seat, a fastening spring is arranged between the movable rod and the baffle, and a chute is formed in the bottom side of the limiting seat. Through above-mentioned technical scheme, at the in-process that carries out be