Reinforcing steel bar performance detection equipment

Abstract

The utility model relates to the field of reinforcing steel bar detection, in particular to reinforcing steel bar performance detection equipment, and aims to solve the technical problem that integrated detection equipment in the prior art is bloated and inconvenient to carry due to the fact that stretching and cold bending detection are carried out by arranging a plurality of groups of hydraulic cylinders. A hydraulic mechanism is arranged above the middle of the base, the lower end of a telescopic rod of the hydraulic mechanism is connected with a first supporting lug, the first supporting lug is hinged to two second supporting lugs through two hinged connecting rods respectively, the two second supporting lugs are connected to two clamps respectively, tensile property detection and cold bending property detection can be carried out only through a single hydraulic cylinder, and the device is portable, convenient to use and high in practicability. And the tensile property detection and the cold bending property detection are switched by switching the hinge points of the connecting rods, so that the switching is convenient.

Description

Technical Field

[0001] The utility model relates to the field of steel bar detection, in particular to steel bar performance detection equipment. Background Art

[0002] The defects of steel bars during melting and rolling, as well as the instability of the chemical composition of steel bars, are often reflected in the tensile strength. When the carbon content is too high and the temperature is too low when rolling is terminated, the tensile strength may be very high; when the carbon content is low and there are too many non-metallic inclusions in the steel, the tensile strength is low. The tensile strength has a direct impact on the ability of reinforced concrete structures to resist repeated loads. The elongation is calculated as the percentage of the length of the elongated part of the original length when the steel bar breaks under tension. Putting the two broken sections of the specimen together, the length of the gauge section after the fracture, L1, can be measured. Subtracting the original length of the gauge, L0, is the plastic deformation value. The ratio of this value to the original length is expressed by δ, that is, the larger the elongation δ value, the better the plasticity of the steel. The elongation is related to the gauge length. For the gauge length of hot-rolled steel bars, 10 times the length of the specimen diameter is taken as the measurement standard, and its elongation is expressed as δ10. For steel wire, the gauge length of 100mm is taken as the standard for the most test, expressed as δ100. For steel strands, it is δ200. At the same time, the cold bending in the test refers to the ability of the steel bar to resist cracking when it undergoes plastic deformation through cold processing. The cold bending test is a test to determine the ability of the steel bar to withstand bending deformation at room temperature;

[0003] The integrated testing equipment in the prior art performs stretching and cold bending testing by setting up multiple groups of hydraulic cylinders, and the equipment is bulky and not portable. Utility Model Content

[0004] The utility model provides a steel bar performance testing device to solve the technical problem that the integrated testing device in the prior art performs stretching and cold bending testing by setting multiple groups of hydraulic cylinders, and the equipment is bulky and not portable.

[0005] A steel bar performance testing device comprises: a base, a slide rail is connected to the upper surface of the base, two clamps arranged opposite to each other are slidably connected to the slide rail, the clamps can be locked on the slide rail, cold-bent brackets are connected to opposite sides of the two clamps, a hydraulic mechanism is arranged above the middle of the base, a support ear 1 is connected to the lower end of the telescopic rod of the hydraulic mechanism, the support ear 1 is hinged to two support ears 2 respectively through two hinged connecting rods, and the two support ears 2 are respectively connected to the two clamps.

[0006] Furthermore, the upper surfaces at both ends of the base are respectively connected to two support ears three, and the connecting rod can be cut off and hinged with the support ear three or the support ear one.

[0007] Furthermore, the slide rail is made of cast iron and has a flat upper surface.

[0008] Furthermore, the clamp includes a slide, which is axially rotatably connected to a rotating shaft, the inner end of the rotating shaft is connected to a turntable, the inner surface of the turntable is connected to a vortex spiral track, the slide has three clamping jaws that slide in the circumferential direction, one side of the clamping jaws is slidably connected to the vortex spiral track, and a clamping port is provided on the other axial side of the slide.

[0009] Beneficial effects of the utility model:

[0010] 1. Only a single hydraulic cylinder is needed to carry out tensile strength test and cold bending performance test, and the equipment is portable;

[0011] 2. The test of tensile strength and cold bending performance can be switched by switching the hinge point of the connecting rod, which is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the structural section of the utility model.

[0014] In the figure: base 1; slide rail 2; fixture 3; cold-bent bracket 4; hydraulic mechanism 5; support ear 1 6; connecting rod 7; support ear 2 8; support ear 3 9; slide frame 31; rotating shaft 32; turntable 33; vortex spiral track 34; clamping claw 35; clamping mouth 36. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] The rotational connection described in this device refers to the process of baking the bearing on the shaft, providing a spring retaining ring groove on the shaft or the shaft hole, and clamping the elastic retaining ring in the retaining ring groove to achieve axial fixation of the bearing and realize rotation; the articulation refers to a connection method that is active on connecting parts such as hinges, pins and short shafts.

[0017] The present invention will be described in detail below with reference to the accompanying drawings.

[0018] Embodiment 1:

[0019] The following is combined with Figure 1-2The present embodiment describes a steel bar performance testing device, comprising: a base 1, a slide rail 2 is connected to the upper surface of the base 1, two clamps 3 are slidably connected to the slide rail 2 and arranged opposite to each other, the clamps 3 can be locked on the slide rail 2, cold-bent brackets 4 are connected to the opposite sides of the two clamps 3, a hydraulic mechanism 5 is provided at the upper middle part of the base 1, a support ear 1 6 is connected to the lower end of the telescopic rod of the hydraulic mechanism 5, the support ear 1 6 is respectively hinged to two support ears 2 8 through two hinged connecting rods 7, and the two support ears 2 8 are respectively connected to the two clamps 3;

[0020] When testing the cold bending performance, remove the connecting rod 7, lock the two clamps 3 symmetrically on the slide rail 2 along the vertical center plane of the base 1, place the steel bar on the arc rods of the two cold bending brackets 4, control the hydraulic mechanism 5 to press the telescopic rod downward, and the telescopic rod drives the support ear 1 6 to press downward. The support ear 1 6 is pressed down to the center of the steel bar and starts to bend with the cold bending bracket 4 as the fulcrum. After meeting the bending requirements, observe whether there are fractures or cracks. When testing the tensile strength, hinge the two ends of the connecting rod 7 on the support ear 1 6 and the support ear 2 8 respectively, clamp the two ends of the steel bar in the two clamps 3 respectively, press the telescopic rod downward, and the telescopic rod drives the two clamps 3 to move away from each other at the same time through the connecting rod 7 to stretch the steel bar, thereby completing the testing of tensile strength and cold bending performance.

[0021] The upper surfaces of both ends of the base 1 are respectively connected to two support ears 3 9, and the connecting rod 7 can be cut off and hinged with the support ear 3 9 or the support ear 1 6;

[0022] When testing the cold bending performance, the upper end of the connecting rod 7 is removed and hinged to the supporting ear 3 9 to complete the locking of the clamp 3.

[0023] The slide rail 2 is made of cast iron and has a flat upper surface;

[0024] The upper surface of the slide rail 2 can be used as a platform to test the compression resistance and other properties of the steel bars.

[0025] The fixture 3 includes a slide 31, the slide 31 is axially rotatably connected to a rotating shaft 32, the inner end of the rotating shaft 32 is connected to a rotating disk 33, the inner surface of the rotating disk 33 is connected to a vortex spiral track 34, the slide 31 is circumferentially slidable with three clamping jaws 35, one side of the clamping jaws 35 is slidably connected to the vortex spiral track 34, and the other axial side of the slide 31 is provided with a clamping opening 36;

[0026] Place the steel bar in the clamping opening 36, rotate the rotating shaft 32, the rotating shaft 32 drives the rotating disk 33 to rotate, the rotating disk 33 drives the vortex spiral track 34 to rotate, and the vortex spiral track 34 drives the three clamping claws 35 to move simultaneously in the sliding groove on the slide 31 to clamp the steel bar and self-lock, thereby completing the clamping.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar performance testing device, comprising: A base (1) is provided, wherein the upper surface of the base (1) is connected to a slide rail (2), and two clamps (3) arranged opposite to each other are slidably connected to the slide rail (2), and the clamps (3) can be locked on the slide rail (2). The invention is characterized in that: a cold-bent bracket (4) is connected to the opposite sides of the two clamps (3); a hydraulic mechanism (5) is provided above the middle of the base (1); a support ear (6) is connected to the lower end of the telescopic rod of the hydraulic mechanism (5); the support ear (6) is hinged to two support ears (8) respectively through two hinged connecting rods (7); and the two support ears (8) are respectively connected to the two clamps (3).

2. A steel bar performance testing device according to claim 1, characterized in that: The upper surfaces at both ends of the base (1) are respectively connected to two support ears (9), and the connecting rod (7) can be cut off and hinged with the support ear (9) or the support ear (6).

3. A steel bar performance testing device according to claim 1, characterized in that: The slide rail (2) is made of cast iron and has a flat upper surface.

4. A steel bar performance testing device according to claim 1, characterized in that: The clamp (3) comprises a slide (31), the slide (31) is axially rotatably connected to a rotating shaft (32), the inner end of the rotating shaft (32) is connected to a rotating disk (33), the inner surface of the rotating disk (33) is connected to a vortex spiral track (34), the slide (31) is provided with three clamping jaws (35) which slide in the circumferential direction, one side of the clamping jaws (35) is slidably connected to the vortex spiral track (34), and the slide (31) is provided with a clamping opening (36) on the other axial side.

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