Steel wire stress relaxation testing machine

Abstract

The utility model provides a steel wire stress relaxation testing machine which comprises a base plate, a stress testing mechanism used for pulling a steel wire is arranged on the base plate, and the stress testing mechanism comprises two-way moving platforms arranged on the left side and the right side of the base plate. The two bidirectional moving platforms are each provided with a clamping assembly used for clamping and fixing a steel wire, and an adsorption assembly used for adsorbing the broken steel wire is arranged below the clamping assemblies and located on the base plate. According to the utility model, a snapped steel wire can be adsorbed and fixed through the adsorption assembly, so that the problems that the surfaces of most testing machines are not provided with protection measures, fractures are likely to splash all around along with the snapping of metal materials such as steel wires and steel strands in an experiment process, and the testing efficiency is increased are solved. And certain body injuries can be caused to experimenters.

Description

Technical Field

[0001] The utility model relates to the technical field of steel wire stress testing equipment, in particular to a steel wire stress relaxation testing machine. Background Art

[0002] In the past decade, cable-stayed structures have developed rapidly and have been widely used in various large and medium-sized structures. As the core component of the cable-stayed structure, the performance of the cable plays an extremely important role in the safety of the structure. At present, the commonly used cables in the cable-stayed structure include steel strands, semi-parallel steel wire bundles, high-vanadium cables, steel tie rods, etc. Since the cable is subjected to high levels of tension in the structure, the cable will experience stress relaxation under long-term high-level tension, resulting in the loss of cable prestress, which has an important impact on the safety performance of the structure.

[0003] Due to its superior structural efficiency, the cable-stayed structure is usually used in large structures, such as stadiums, exhibition centers, railway stations, and large shopping malls. Such structures are characterized by dense personnel and high mobility, and their structural safety is particularly important. Therefore, the study of cable stress relaxation is also extremely necessary and urgent. However, the only research currently focuses on high-strength steel wires and steel strands, and is more involved in bridge structures and prestressed concrete structures, while there are fewer studies on the stress relaxation of cable-stayed structures. As for steel strands, the relevant data and results in bridge structures and prestressed concrete structures can be referred to; high-vanadium cable is actually a steel strand with a special coating, so its relaxation test can refer to the relevant research on steel strands; semi-parallel steel wire bundles are made of multiple high-strength steel wires twisted at a certain angle. Due to the special twisting characteristics, the relaxation performance of the entire cable body is somewhat different from the relaxation performance of a single high-strength steel wire, so it is necessary to conduct special research on its stress relaxation performance.

[0004] At present, most of the existing testing machines do not have protective measures on the surface. During the experiment, as metal materials such as steel wires and steel strands break, the broken ends are likely to splash around, which may cause certain physical harm to the experimenters. Utility Model Content

[0005] In view of this, the utility model provides a steel wire stress relaxation testing machine, which can adsorb and fix the broken steel wire through an adsorption component, solving the problem that most testing machines have no protective measures on the surface. During the experiment, as metal materials such as steel wire and steel strand break, the broken ends are likely to splash around, which may cause certain physical injuries to the experimenters.

[0006] To solve the above technical problems, the utility model provides a steel wire stress relaxation testing machine, including a base plate, on which a stress testing mechanism for pulling the steel wire is arranged, the stress testing mechanism including a two-way movable platform arranged on the left and right sides of the base plate, the two two-way movable platforms are respectively provided with a clamping assembly for clamping and fixing the steel wire, and an adsorption assembly for adsorbing the broken steel wire is arranged below the clamping assembly and on the base plate. The utility model can realize synchronous tightening operation of the clamping assembly for clamping the steel wire stress to be tested through the cooperation of the two-way movable platform, and can realize adsorption and fixation of the broken steel wire through the adsorption assembly, which solves the problem that most testing machines have no protective measures on the surface. During the experiment, as metal materials such as steel wire and steel strand are broken, the fracture is likely to splash around, which may cause certain physical injuries to the experimenters.

[0007] The two-way movable platform includes a slide rail arranged on a base plate, and two sliders are slidably arranged in the slide rail, and the two sliders are provided with internal threads with opposite threads, and the internal threads of the slide rail are connected with positive and negative thread screws, and the positive and negative thread screws respectively penetrate the slide blocks, and a driving motor is arranged outside the positive and negative thread screws. The utility model can drive the positive and negative thread screws to rotate together by the rotation of the output shaft of the driving motor, and combined with the threaded connection effect of the slider and the positive and negative thread screws and the guiding and limiting effect of the slide rail on the slider, the rotation of the positive and negative thread screws can drive the two sliders to move toward each other along the slide rail, thereby realizing the breaking operation of the steel wire, which is convenient for cooperating with the stress testing mechanism to detect the stress of the steel wire.

[0008] The clamping assembly includes a fixing plate arranged on two sliding blocks on the same horizontal line, the fixing plate is provided with a through hole for the steel wire to pass through, a bolt is connected to the inner thread of the through hole, the bottom of the bolt is a bare rod, a bearing is arranged at the bottom of the bolt and located in the through hole, and a clamping plate for clamping the steel wire is arranged under the bearing. The utility model can pre-insert the steel wire to be tested for stress into the through hole, and then tighten the bolt with the help of a wrench. The rotation of the bolt will move the bearing and the clamping plate downward to clamp the steel wire, which is more firm and convenient.

[0009] The adsorption component includes a placement plate arranged directly below the through hole and located on the substrate. The placement plate is provided with an electromagnet for adsorbing the broken steel wire. When the steel wire is about to reach a preset breaking stress, the electromagnet is started and energized. At this time, as the bidirectional moving platform continues to tighten, the broken steel wire will be adsorbed on the electromagnet, which is safer and more convenient.

[0010] A switch button for controlling the on and off power of the electromagnet is arranged on the placement plate. By pressing the switch button, the on and off power of the electromagnet can be controlled, which makes it more convenient to attract and fix the broken steel wire to prevent it from being thrown out and injuring people when it breaks.

[0011] A stress tester for detecting the stress when the steel wire breaks is arranged between the two fixing plates. The stress magnitude when the steel wire breaks can be tested by the stress tester, which is more convenient.

[0012] In summary, compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0013] 1. The utility model can realize synchronous tightening operation of the clamping assembly for clamping the steel wire stress to be measured through the cooperation of the bidirectional mobile platform, and can realize adsorption and fixation of the broken steel wire through the adsorption assembly, which solves the problem that most testing machines have no protective measures on the surface. During the experiment, as the metal materials such as steel wire and steel strand are broken, the fracture is likely to splash around, which may cause certain physical injuries to the experimenters.

[0014] 2. The utility model can drive the forward and reverse threaded screws to rotate together by rotating the output shaft of the driving motor. In addition, the rotation of the forward and reverse threaded screws can drive the two sliders to move toward each other along the slide rail, thereby realizing the wire breaking operation, which is convenient for cooperating with the stress testing mechanism to detect the stress of the steel wire.

[0015] 3. The utility model can insert the steel wire to be tested for stress into the through hole in advance, and then tighten the bolt with the help of a wrench. The rotation of the bolt will move the bearing and the clamping plate downward to clamp the steel wire, which is more firm and convenient.

[0016] 4. When the steel wire is about to reach the preset breaking stress, start the electromagnet and energize it. At this time, as the two-way moving platform continues to tighten, the broken steel wire will be adsorbed on the electromagnet, which is safer and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of the utility model steel wire stress relaxation testing machine;

[0018] Figure 2 It is a rear view of the steel wire stress relaxation testing machine of the utility model;

[0019] Figure 3 It is a top view of the steel wire stress relaxation testing machine of the utility model;

[0020] Figure 4 It is a side view of the steel wire stress relaxation testing machine of the utility model.

[0021] Explanation of the reference numerals: 100, substrate; 200, stress testing mechanism; 210, bidirectional movable platform; 211, slide rail; 212, slider; 213, positive and negative thread screw; 214, drive motor; 220, clamping assembly; 221, fixing plate; 222, through hole; 223, bolt; 224, bearing; 225, clamping plate; 300, adsorption assembly; 301, placement plate; 302, electromagnet; 303, switch button. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1-4 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] like Figure 1-4 As shown: This embodiment provides a steel wire stress relaxation testing machine, including a base plate 100, on which a stress testing mechanism 200 for pulling the steel wire is arranged, the stress testing mechanism 200 includes a two-way movable platform 210 arranged on the left and right sides of the base plate 100, and the two two-way movable platforms 210 are respectively provided with a clamping assembly 220 for clamping and fixing the steel wire, and an adsorption assembly 300 for adsorbing the broken steel wire is arranged below the clamping assembly 220 and located on the base plate 100. The utility model can realize the synchronous tightening operation of the clamping assembly 220 for clamping the steel wire stress to be tested through the cooperation of the two-way movable platform 210, and can realize the adsorption and fixation of the broken steel wire through the adsorption assembly 300, which solves the problem that most testing machines have no protective measures on the surface. During the experiment, as the metal materials such as steel wire and steel strand are broken, the fracture is likely to splash around, which may cause certain physical injuries to the experimenters.

[0024] According to one embodiment of the utility model, Figure 1-4As shown, the bidirectional movable platform 210 includes a slide rail 211 arranged on the base plate 100, and two sliders 212 are slidably arranged in the slide rail 211, and the two sliders 212 are provided with internal threads with opposite threads, and the internal threads of the slide rail 211 are connected with positive and negative thread screws 213, and the positive and negative thread screws 213 respectively penetrate the sliders 212, and the outside of the positive and negative thread screws 213 is provided with a driving motor 214. The utility model can drive the positive and negative thread screws 213 to rotate together by the rotation of the output shaft of the driving motor 214, and coupled with the threaded connection effect of the slider 212 and the positive and negative thread screws 213 and the guiding and limiting effect of the slide rail 211 on the slider 212, the rotation of the positive and negative thread screws 213 can drive the two sliders 212 to move toward each other along the slide rail 211, thereby realizing the breaking operation of the steel wire, which is convenient for cooperating with the stress testing mechanism 200 to detect the stress of the steel wire.

[0025] According to another embodiment of the present invention, Figure 1 and Figure 2 As shown, the clamping assembly 220 includes a fixing plate 221 arranged on two sliders 212 on the same horizontal line, and a through hole 222 for the steel wire to pass through is opened on the fixing plate 221, and a bolt 223 is connected to the inner thread of the through hole 222, and the bottom of the bolt 223 is a bare rod, and a bearing 224 is arranged at the bottom of the bolt 223 and located in the through hole 222, and a clamping plate 225 for clamping the steel wire is arranged at the lower part of the bearing 224. The utility model can pre-insert the steel wire to be tested for stress into the through hole 222, and then tighten the bolt 223 with the help of a wrench, and the rotation of the bolt 223 will move the bearing 224 and the clamping plate 225 downward to clamp the steel wire, which is more firm and convenient.

[0026] According to another embodiment of the present invention, Figure 1 and Figure 3 As shown, the adsorption component 300 includes a placement plate 301 arranged directly below the through hole 222 and located on the substrate 100. The placement plate 301 is provided with an electromagnet 302 for adsorbing the broken steel wire. When the steel wire is about to reach a preset breaking stress, the electromagnet 302 is started and energized. At this time, as the bidirectional moving platform 210 continues to be tightened, the broken steel wire will be adsorbed on the electromagnet 302, which is safer and more convenient.

[0027] According to another embodiment of the present invention, Figure 1 and Figure 4 As shown, a switch button 303 for controlling the on and off of the electromagnet 302 is provided on the placement plate 301. By pressing the switch button 303, the on and off of the electromagnet 302 can be controlled, so that the broken steel wire can be attracted and fixed more conveniently to prevent it from being thrown out and injuring people when it breaks.

[0028] A stress tester for detecting the stress when the steel wire breaks is arranged between the two fixing plates 221. The stress tester can be used to test the magnitude of the stress when the steel wire breaks, which is more convenient.

[0029] The use of the utility model:

[0030] First of all, it should be made clear that the testing machine involved in the utility model is mainly used to detect the stress of the steel wire. The utility model takes the steel wire stress detection test as an example to explain its use method in detail. It should be made clear here that the stress tester is an instrument used to experiment with the stress size in the prior art. Here, it is necessary to first set an elastic rope between the two fixed plates 221, and fix the two ends of the elastic rope to the force measuring probe of the stress tester respectively. When it is necessary to detect the stress when the steel wire breaks, the steel wire is passed through the through holes 222 on the two fixed plates 221 by hand, and then the bolts 223 on the through holes 222 on the fixed plates 221 are respectively screwed until the rotation of the bolts 223 drives the bearing 224 and the clamping plate 2 25 moves downward to clamp the steel wire, and then starts the output shaft of the driving motor 214 to rotate, and the rotation of the output shaft of the driving motor 214 drives the positive and negative threaded screws 213 to rotate together. In addition, the threaded connection between the slider 212 and the positive and negative threaded screws 213 and the guiding and limiting effect of the slide rail 211 on the slider 212, the rotation of the positive and negative threaded screws 213 can drive the two sliders 212 to move toward each other along the slide rail 211, thereby realizing the wire breaking operation. At the same time, start the electromagnet 302 to energize. At this time, with the continuous tightening of the bidirectional movable platform 210, the steel wire will eventually break. At this time, the data on the stress detector is recorded, and the broken steel wire will be adsorbed on the electromagnet 302. The utility model can realize synchronous tightening operation of clamping component 220 for clamping the steel wire stress to be measured through cooperation of bidirectional moving platform 210, and can realize adsorption and fixation of broken steel wire through adsorption component 300, thus solving the problem that most testing machines have no protective measures on the surface, and during the experiment, as the metal materials such as steel wire and steel strand are broken, the broken ends are likely to splash around, which may cause certain physical harm to the experimenters.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A steel wire stress relaxation testing machine, comprising a base plate (100), characterized in that: The substrate (100) is provided with a stress testing mechanism (200) for pulling the steel wire, and the stress testing mechanism (200) comprises two bidirectional movable platforms (210) arranged on the left and right sides of the substrate (100), and the two bidirectional movable platforms (210) are respectively provided with clamping assemblies (220) for clamping and fixing the steel wire, and an adsorption assembly (300) for adsorbing the broken steel wire is arranged below the clamping assembly (220) and on the substrate (100).

2. The steel wire stress relaxation testing machine according to claim 1, characterized in that: The bidirectional movable platform (210) comprises a slide rail (211) arranged on a base plate (100), two sliders (212) are slidably arranged inside the slide rail (211), the two sliders (212) are provided with internal threads with opposite screw threads, the internal threads of the slide rail (211) are connected with positive and negative thread screws (213), the positive and negative thread screws (213) respectively penetrate the sliders (212), and a driving motor (214) is arranged outside the positive and negative thread screws (213).

3. The steel wire stress relaxation testing machine according to claim 2, characterized in that: The clamping assembly (220) comprises a fixing plate (221) arranged on two sliders (212) on the same horizontal line, the fixing plate (221) is provided with a through hole (222) for the steel wire to pass through, a bolt (223) is connected to the through hole (222) by a thread, the bottom of the bolt (223) is a bare rod, a bearing (224) is arranged at the bottom of the bolt (223) and located in the through hole (222), and a clamping plate (225) for clamping the steel wire is arranged at the lower part of the bearing (224).

4. The steel wire stress relaxation testing machine according to claim 3, characterized in that: The adsorption assembly (300) comprises a placement plate (301) arranged directly below the through hole (222) and located on the substrate (100), and an electromagnet (302) for adsorbing the broken steel wire is arranged on the placement plate (301).

5. The steel wire stress relaxation testing machine according to claim 4, characterized in that: The placement plate (301) is provided with a switch button (303) for controlling the on and off of the electromagnet (302).

6. The steel wire stress relaxation testing machine according to claim 5, characterized in that: A stress tester for detecting stress when the steel wire breaks is arranged between the two fixing plates (221).

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