A steel strand relaxation testing machine

Abstract

The utility model discloses a steel strand relaxation tester, comprising a bottom plate, wherein the upper ends of the bottom plate are respectively fixedly connected with a first side plate and a second side plate, a hydraulic cylinder is fixedly connected to the side wall of the first side plate, one end of the hydraulic cylinder is fixedly connected with a connecting plate, and clamping devices are provided on the opposite side walls of the connecting plate and the second side plate, and the upper side of the bottom plate is connected with two movable plates through a relative moving device, and the two movable plates are slidably connected to the upper side of the bottom plate, and a plurality of semi-ring blocks are fixedly connected to the upper side of each movable plate, and each of the semi-ring blocks is arranged in a semicircular ring shape, and the plurality of semi-ring blocks on the two movable plates are arranged symmetrically one by one. When the utility model conducts a steel strand relaxation test, the plurality of semi-ring blocks will be connected one by one to form a circular ring and then cover the steel strand body, thereby avoiding the possibility of injury to surrounding workers after the steel strand body breaks, and the safety is high.

Description

Technical Field

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

[0002] Steel strand is an important material in prestressed engineering construction. The manufacturing process is divided into single-wire manufacturing and stranded wire manufacturing. The (cold) wire drawing technology is used to make single-wire. Depending on the different materials of the product, it can be high-carbon steel wire rod, stainless steel wire rod or medium-low carbon steel wire rod. If galvanizing is required, electroplating or hot-dip treatment should be performed on the single wire. In the process of stranded wire manufacturing, a stranding machine is used to twist multiple steel wires into products. Prestressed steel strands also need to be continuously stabilized after forming. The final product is generally collected on a reel or completed as a reel-less roll. The quality of steel strands must be tested before construction. At present.

[0003] For example, Chinese patent number CN214503150U discloses a high-precision steel strand relaxation testing machine, which has the effect of reducing the possibility of loosening of steel strands and having high detection accuracy. However, when the existing steel strand relaxation testing device performs a tensile test, the steel strand is prone to break when being stretched, and after breaking, it is easy to injure surrounding personnel. Utility Model Content

[0004] The utility model provides a steel strand relaxation testing machine to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A steel strand relaxation testing machine comprises a base plate, wherein the first side plate and the second side plate are fixedly connected at both ends of the upper side of the base plate respectively, a hydraulic cylinder is fixedly connected to the side wall of the first side plate, one end of the hydraulic cylinder is fixedly connected to a connecting plate, clamping devices are provided on the opposite side walls of the connecting plate and the second side plate, two movable plates are connected to the upper side of the base plate through a relative moving device, the two movable plates are slidably connected to the upper side of the base plate, a plurality of semi-ring blocks are fixedly connected to the upper side of each of the movable plates, each of the semi-ring blocks is arranged in a semicircular ring shape, and the plurality of semi-ring blocks on the two movable plates are arranged symmetrically one to one.

[0007] Preferably, the clamping device includes a clamping head, and the two clamping heads are respectively fixedly connected to the side walls opposite to the connecting plate and the second side plate, and a placement groove is provided on the side wall of each clamping head, and a lifting groove is provided on the upper side of the placement groove, and a pressure block is slidably connected in the lifting groove, and the upper end of the pressure block is rotatably connected to a second threaded rod, the second threaded rod passes through the upper side of the lifting groove, the second threaded rod is threadedly connected to the upper side wall of the lifting groove, and the upper end of the second threaded rod is fixedly connected to a rotating plate.

[0008] Preferably, anti-slip grooves are provided on the bottom side walls of the pressing block.

[0009] Preferably, the relative movement device includes a motor and a fixed block, the motor and the fixed block are fixedly connected to the upper side of the base plate, the output end of the motor is fixedly connected to a first threaded rod, one end of the first threaded rod is rotatably connected to the side wall of the fixed block, the thread on the first threaded rod is divided into two sections, and the two sections of the thread are arranged opposite to each other, and the two movable plates are respectively threadedly connected to the two sections of the threaded side walls of the first threaded rod.

[0010] Preferably, a rubber layer is provided on the inner ring side wall of each of the semi-ring stoppers.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The device is reasonably designed. By arranging semi-ring blocks, movable plates, first threaded rods, motors, fixed blocks and other components to cooperate with each other, multiple semi-ring blocks will be connected one by one to form a circular ring to cover the steel strand body while conducting a steel strand relaxation test, thereby avoiding the possibility of injuring surrounding workers after the steel strand body breaks, and has high safety.

[0013] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0015] Figure 1 This is a front view structural schematic diagram of a steel strand relaxation testing machine proposed by the utility model;

[0016] Figure 2This is a schematic diagram of the top view of a steel strand relaxation testing machine proposed by the utility model;

[0017] Figure 3 This is a front cross-sectional structural schematic diagram of a steel strand relaxation testing machine proposed by the utility model;

[0018] Figure 4 It is a side cross-sectional structural schematic diagram of a steel strand relaxation testing machine proposed by the utility model;

[0019] Figure 5 for Figure 3 A is a schematic diagram of the partially enlarged structure of the middle part;

[0020] Figure 6 It is a schematic diagram of the side cross-sectional structure of the clamping head in the utility model;

[0021] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping head in the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. First side plate; 2. Hydraulic cylinder; 3. Connecting plate; 4. Motor; 5. Moving plate; 6. Clamping head; 7. Second side plate; 8. Steel strand body; 9. Semi-ring stopper; 10. Rubber layer; 11. Turning plate; 12. Bottom plate; 13. Fixed block; 14. First threaded rod; 15. Second threaded rod; 16. Lifting slot; 17. Pressing block; 18. Placement slot. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figures 1 to 7 In an embodiment of the utility model, a steel strand relaxation testing machine comprises a bottom plate 12, the upper ends of the bottom plate 12 are respectively fixedly connected with a first side plate 1 and a second side plate 7, a hydraulic cylinder 2 is fixedly connected to the side wall of the first side plate 1, one end of the hydraulic cylinder 2 is fixedly connected to a connecting plate 3, and clamping devices are provided on the opposite side walls of the connecting plate 3 and the second side plate 7, and the upper side of the bottom plate 12 is connected to two movable plates 5 through a relative moving device, and the two movable plates 5 are slidably connected to the upper side of the bottom plate 12, and a plurality of semi-ring stoppers 9 are fixedly connected to the upper side of each movable plate 5, each semi-ring stopper 9 is arranged in a semicircular ring shape, and the plurality of semi-ring stoppers 9 on the two movable plates 5 are arranged symmetrically one by one, and a rubber layer 10 is provided on the inner ring side wall of each semi-ring stopper 9.

[0028] Specifically, the clamping device includes a clamping head 6, and the two clamping heads 6 are respectively fixedly connected to the side walls opposite to the connecting plate 3 and the second side plate 7. A placement groove 18 is provided on the side wall of each clamping head 6, and a lifting groove 16 is provided on the upper side of the placement groove 18. A pressure block 17 is slidably connected in the lifting groove 16, and an anti-slip pattern is provided on the bottom side wall of the pressure block 17. The upper end of the pressure block 17 is rotatably connected to a second threaded rod 15, and the second threaded rod 15 passes through the upper side of the lifting groove 16. The second threaded rod 15 is threadedly connected to the upper side wall of the lifting groove 16. Then, the upper end of the second threaded rod 15 is fixedly connected with a rotating plate 11, and the center lines of the placement grooves 18 on the two clamping heads 6 are collinear. When installing the steel strand body 8, firstly, the two ends of the steel strand body 8 are respectively extended into the placement grooves 18 on the side walls of the two clamping heads 6, and then the rotating plate 11 is grasped to drive the second threaded rod 15 to be screwed downward. When the second threaded rod 15 is screwed, it can drive the pressing block 17 to clamp one end of the steel strand body 8 downward, thereby clamping one end of the steel strand body 8 and fixing it in the placement groove 18.

[0029] Specifically, the relative movement device includes a motor 4 and a fixed block 13, the motor 4 and the fixed block 13 are fixedly connected to the upper side of the base plate 12, the output end of the motor 4 is fixedly connected to a first threaded rod 14, one end of the first threaded rod 14 is rotatably connected to the side wall of the fixed block 13, the thread on the first threaded rod 14 is divided into two sections, and the two sections of the thread are arranged opposite to each other, the two movable plates 5 are respectively threadedly connected to the two sections of the threaded side walls of the first threaded rod 14, the control motor 4 drives the first threaded rod 14 to rotate, and the rotation of the first threaded rod 14 can drive the two movable plates 5 to move relative to each other, when the two movable plates 5 are docked, the multiple semi-ring blocks 9 on the upper sides of the two movable plates 5 will dock one by one to form a circular ring to cover the steel strand body 8, and the steel strand body 8 can be blocked by the multiple semi-ring blocks 9 even after it breaks.

[0030] The surrounding staff may be injured.

[0031] The working principle of the utility model is:

[0032] When conducting a steel strand relaxation test, firstly, the two ends of the steel strand body 8 are respectively inserted into the placement grooves 18 on the side walls of the two clamping heads 6, and then the rotating plate 11 is grasped to drive the second threaded rod 15 to screw downward. When the second threaded rod 15 screws, it can drive the pressing block 17 to clamp one end of the steel strand body 8 downward, so that one end of the steel strand body 8 is clamped and fixedly connected in the placement groove 18, and then the hydraulic cylinder 2 is retracted to move the hydraulic cylinder 2 through the connecting plate 3, thereby driving the steel strand body 8 to stretch. At this time, the tensile strain of the steel strand body 8 can be detected by a detection device such as a patch strain sensor (not shown);

[0033] While conducting the relaxation test of the steel strand body 8, the motor 4 is controlled to drive the first threaded rod 14 to rotate. The rotation of the first threaded rod 14 can drive the two movable plates 5 to move relative to each other. When the two movable plates 5 are docked, the multiple semi-ring blocks 9 on the upper sides of the two movable plates 5 will dock one by one to form a circular ring to cover the steel strand body 8. The multiple semi-ring blocks 9 can protect the steel strand body 8, thereby avoiding the possibility of injuring surrounding personnel after the steel strand body 8 breaks.

[0034] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A steel strand relaxation testing machine, comprising a bottom plate (12), characterized in that: The two ends of the upper side of the bottom plate (12) are respectively fixedly connected to the first side plate (1) and the second side plate (7); the side wall of the first side plate (1) is fixedly connected to a hydraulic cylinder (2); one end of the hydraulic cylinder (2) is fixedly connected to a connecting plate (3); the connecting plate (3) and the second side plate (7) are provided with clamping devices on the opposite side walls; the upper side of the bottom plate (12) is connected to two movable plates (5) via a relative moving device; the two movable plates (5) are slidably connected to the upper side of the bottom plate (12); the upper side of each movable plate (5) is fixedly connected to a plurality of semi-ring stoppers (9); each semi-ring stopper (9) is arranged in a semicircular ring shape; and the plurality of semi-ring stoppers (9) on the two movable plates (5) are arranged symmetrically one to one.

2. A steel strand relaxation testing machine according to claim 1, characterized in that: The clamping device comprises a clamping head (6), wherein the two clamping heads (6) are respectively fixedly connected to the side walls opposite to the connecting plate (3) and the second side plate (7), a placement groove (18) is provided on the side wall of each clamping head (6), a lifting groove (16) is provided on the upper side of the placement groove (18), a pressure block (17) is slidably connected in the lifting groove (16), the upper end of the pressure block (17) is rotatably connected to a second threaded rod (15), the second threaded rod (15) passes through the upper side of the lifting groove (16), the second threaded rod (15) is threadedly connected to the upper side wall of the lifting groove (16), and the upper end of the second threaded rod (15) is fixedly connected to a rotating plate (11).

3. A steel strand relaxation testing machine according to claim 2, characterized in that: The bottom side wall of the pressing block (17) is provided with anti-slip grooves.

4. A steel strand relaxation testing machine according to claim 3, characterized in that: The relative movement device comprises a motor (4) and a fixed block (13), wherein the motor (4) and the fixed block (13) are both fixedly connected to the upper side of the bottom plate (12), the output end of the motor (4) is fixedly connected to a first threaded rod (14), one end of the first threaded rod (14) is rotatably connected to the side wall of the fixed block (13), the thread on the first threaded rod (14) is divided into two sections, and the two sections of the thread are arranged opposite to each other, and the two movable plates (5) are respectively threadedly connected to the two sections of the threaded side walls of the first threaded rod (14).

5. A steel strand relaxation testing machine according to claim 4, characterized in that: A rubber layer (10) is provided on the inner ring side wall of each semi-ring stopper (9).

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