Steel strand testing machine

Abstract

The utility model discloses a steel strand testing machine, which relates to the field of steel strand testing machines and comprises a working table and two triangular supports with notches, one triangular support is fixedly mounted on the surface of the working table, and the other triangular support is movably mounted on the surface of the working table. According to the steel strand testing machine, the connecting springs, the triangular frames and the extrusion blocks are arranged, a steel strand is inserted between the two extrusion blocks through the round holes, the two extrusion blocks in the triangular frames are tightly attached to the surface of the steel strand due to the elastic force of the connecting springs, and at the moment, the hydraulic rods enable the corresponding triangular frames to move; the friction force between the steel strand and the extrusion block is relatively large, and when the tripod is pulled, the inner side of the tripod is continuously close to the extrusion block, so that the pressure between the extrusion block and the steel strand is increased, the steel strand is prevented from falling off, the tension of the steel strand is detected, the extrusion block does not need to be driven to move through an additional power source, and the detection efficiency is improved. And the use cost is lower.

Description

Technical Field

[0001] The utility model relates to the field of strand testing machines, and particularly relates to a strand testing machine. Background Technique

[0002] A strand is an iron and steel product composed of multiple steel wires stranded together, and is widely used in fields such as construction, bridges, and machinery manufacturing. To ensure that the production of strands meets the requirements, tensile tests are usually carried out on strands, and a strand testing machine is required. It is a mechanical equipment for the mechanical property test of prestressed strands, mainly for the detection of tensile properties, tensile strength and deformation rate, breaking force, and tear resistance, including wedge blocks and two right-angled holders inside.

[0003] When in use, both ends of the strand need to be placed between the two holders. Traditional testing machines usually use mechanical or electro-hydraulic servo systems to conduct tensile tests on strands, and a controller is required to make the clamping blocks move to pre-fix the strands. During the stretching process, the equipment will record data such as the deformation amount and tensile force of the strands. A power source needs to be set inside each wedge block to cooperate with the controller to clamp the strands, which increases the manufacturing cost and maintenance cost of the equipment. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a strand testing machine, which can effectively solve the problems in the background technique.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a strand testing machine, including a workbench and two triangular frames with notches. One of the triangular frames is fixedly installed on the surface of the workbench, and the other triangular frame is movably installed on the surface of the workbench. A hydraulic rod is installed on the surface of the workbench, and the hydraulic rod is fixed on the surface of the triangular frame. Two right-angled triangular pressing blocks are movably installed inside the triangular frame. A connecting spring is installed between the two pressing blocks. The opposite sides of the two pressing blocks of the fixedly installed triangular frame are in contact, and a through circular hole is opened on the surface of the triangular frame.

[0006] A hole plate is fixedly installed on the surface of the pressing block. A guide rod is movably installed inside the hole plate. The connecting spring is sleeved on the surface of the guide rod. Both ends of the connecting spring are fixed on the adjacent two hole plates. Anti-disengagement plates are fixedly installed at both ends of the guide rod.

[0007] A sliding rod is fixedly installed on the hypotenuse side of the pressing block. The cross-section of the sliding rod is T-shaped. A matching sliding groove is opened on the hypotenuse side of the inner wall of the triangular frame. The sliding rod is movably installed inside the sliding groove.

[0008] An installation plate is fixedly connected to the outer side of the tripod. A stud is fixedly installed on the surface of the workbench. The stud movably penetrates through the installation plate. A bolt is sleeved on the surface of the stud, and the bolt abuts against the surface of the installation plate.

[0009] A guiding inclined groove is formed on the lower surface of the extrusion block. The inclination degree of the guiding inclined groove is the same as that of the hypotenuse of the extrusion block. A roller member is fixedly installed on the surface of the workbench.

[0010] An arc is arranged on the opposite side of the tripod.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, by arranging a connecting spring, a tripod and an extrusion block, the steel strand is inserted between the two extrusion blocks through a round hole. The two extrusion blocks inside the tripod are tightly attached to the surface of the steel strand due to the elastic force of the connecting spring. At this time, the hydraulic rod makes the corresponding tripod move, and the friction force between the steel strand and the extrusion block will be relatively large. When the tripod is pulled more, its inner side will continuously approach the extrusion block, thereby increasing the pressure between the extrusion block and the steel strand, preventing the steel strand from falling off, and thus realizing the detection of the tensile force of the steel strand. There is no need to drive the movement of the extrusion block through an additional power source, and the use cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a steel strand testing machine of the utility model;

[0014] Figure 2 It is a schematic diagram of a partial structure at the position of the guiding inclined groove of a steel strand testing machine of the utility model;

[0015] Figure 3 It is a schematic diagram of a partial structure at the position of the sliding rod of a steel strand testing machine of the utility model;

[0016] Figure 4 It is a schematic diagram of a partial structure at the position of the roller member of a steel strand testing machine of the utility model.

[0017] In the figure: 1, workbench; 2, tripod; 3, hydraulic rod; 4, extrusion block; 5, connecting spring; 6, round hole; 7, hole plate; 8, guiding rod; 9, anti - detachment plate; 10, sliding rod; 11, sliding groove; 12, installation plate; 13, stud; 14, bolt; 15, guiding inclined groove; 16, roller member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the technical means, creative features, achieving purposes and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

[0019] As Figures 1-4 shown, a strand testing machine includes a workbench 1 and two triangular frames 2 with notches located at the angular positions of the triangular frames 2. One of the triangular frames 2 is fixedly installed on the surface of the workbench 1, and the other triangular frame 2 is movably installed on the surface of the workbench 1. A hydraulic rod 3 is installed on the surface of the workbench 1, and the hydraulic rod 3 is fixed on the surface of the triangular frame 2. When the hydraulic rod 3 is activated, it can pull the triangular frame 2 to move. Two right-angled triangular pressing blocks 4 are movably installed inside the triangular frame 2. The two right-angled sides of the pressing block 4 are opposite sides, and the pressing blocks 4 are symmetrically arranged. A connecting spring 5 is installed between the two pressing blocks 4. The opposite sides of the two pressing blocks 4 of the fixedly installed triangular frame 2 are in contact. That is, when the connecting spring 5 at this position is in the initial state, the distance between the two pressing blocks 4 is less than the diameter of the strand. As Figure 1 shown, the distance between the initial positions of the other two pressing blocks 4 is much greater than the diameter of the strand, and a through circular hole 6 is provided on the surface of the triangular frame 2.

[0020] The overall initial state is as Figure 1 shown. The strand is inserted between the two pressing blocks 4 through the circular hole 6. The two pressing blocks 4 inside the triangular frame 2 are tightly attached to the surface of the strand due to the elastic force of the connecting spring 5. At this time, the hydraulic rod 3 makes the corresponding triangular frame 2 move. Due to the elastic force of the connecting spring 5 at this position, the two pressing blocks 4 are tightly attached to the surface of the strand, and the frictional force between the strand and the pressing blocks 4 will be relatively large. When the triangular frame 2 is pulled, its inner side will continuously approach the pressing blocks 4, thereby increasing the pressure between the pressing blocks 4 and the strand, preventing the strand from falling off, and thus realizing the detection of the tensile force of the strand. There is no need to drive the movement of the pressing blocks 4 through an additional power source, and the use cost is lower.

[0021] A hole plate 7 is fixedly installed on the surface of the pressing block 4. A guide rod 8 is movably installed inside the hole plate 7. The connecting spring 5 is sleeved on the surface of the guide rod 8. The guide rod 8 guides the movement of the connecting spring 5. The guide rod 8 can ensure that the movement states of two adjacent pressing blocks 4 are consistent, making the force on the pressing blocks 4 more evenly distributed when squeezing the strand. The two ends of the connecting spring 5 are fixed on two adjacent hole plates 7. Anti-disengagement plates 9 are fixedly installed at both ends of the guide rod 8 to prevent the guide rod 8 from falling off.

[0022] A sliding rod 10 is fixedly installed on the hypotenuse side of the pressing block 4. The cross-section of the sliding rod 10 is T-shaped. A matching sliding groove 11 is provided on the hypotenuse side of the inner wall of the triangular frame 2. The sliding rod 10 is movably installed inside the sliding groove 11 to prevent the pressing block 4 from being extruded by the triangular frame 2 and ensure the stable movement of the pressing block 4.

[0023] An installation plate 12 is fixedly connected to the outer side of the tripod 2. A stud 13 is fixedly installed on the surface of the workbench 1. The stud 13 movably penetrates through the installation plate 12. A bolt 14 is sleeved on the surface of the stud 13. The bolt 14 abuts against the surface of the installation plate 12 to prevent the tripod 2 at this position from being pulled. At the same time, due to the frictional force between the steel strand and the extrusion block 4, the steel strand pulls the extrusion block 4 to move, so that the extrusion block 4 can also move inside the tripod 2, ensuring stable clamping of the steel strand.

[0024] A guiding inclined groove 15 is formed on the lower surface of the extrusion block 4. The inclination degree of the guiding inclined groove 15 is the same as that of the hypotenuse of the extrusion block 4. A roller member 16 is fixedly installed on the surface of the workbench 1. The roller of the roller member 16 is movably installed inside the guiding inclined groove 15. When the extrusion block 4 moves, due to the guiding function of the roller member 16, the original frictional force during movement can be reduced, ensuring that the extrusion block 4 moves more smoothly.

[0025] An arc is provided on the opposite sides of the tripod 2 to ensure stable clamping of the steel strand.

[0026] It should be noted that the present invention is a steel strand testing machine. When in use, the steel strand is inserted between the two extrusion blocks 4 through the round hole 6. The two extrusion blocks 4 inside the tripod 2 are tightly attached to the surface of the steel strand due to the elastic force of the connecting spring 5. At this time, the hydraulic rod 3 moves the corresponding tripod 2. Due to the elastic force of the connecting spring 5, the two extrusion blocks 4 are tightly attached to the surface of the steel strand. When the tripod 2 is pulled, its inner side will continuously approach the extrusion block 4, thereby increasing the pressure between the extrusion block 4 and the steel strand. The two extrusion blocks 4 at another position move due to the frictional force, so that the steel strand pulls the extrusion block 4 to move, so that the extrusion block 4 can also move inside the tripod 2, ensuring stable clamping of the steel strand, thereby increasing the pressure between the extrusion block 4 and the steel strand, preventing the steel strand from falling off, and thus realizing the detection of the tensile force of the steel strand. There is no need to drive the movement of the extrusion block 4 through an additional power source, and the use cost is lower.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel strand testing machine, comprising a workbench (1) and two triangular frames (2) with notches, wherein one of the triangular frames (2) is fixedly installed on the surface of the workbench (1), and the other triangular frame (2) is movably installed on the surface of the workbench (1). A hydraulic rod (3) is installed on the surface of the workbench (1), and the hydraulic rod (3) is fixed on the surface of the triangular frame (2), and is characterized in that: Two right-angled triangular pressing blocks (4) are movably installed inside the tripod (2). A connecting spring (5) is installed between the two pressing blocks (4). The opposite sides of the two pressing blocks (4) of the fixedly installed tripod (2) are in contact, and a through circular hole (6) is formed on the surface of the tripod (2).

2. The strand testing machine according to claim 1, wherein: A hole plate (7) is fixedly installed on the surface of the pressing block (4). A guide rod (8) is movably installed inside the hole plate (7). The connecting spring (5) is sleeved on the surface of the guide rod (8). Both ends of the connecting spring (5) are fixed on the adjacent two hole plates (7). Anti-disengagement plates (9) are fixedly installed at both ends of the guide rod (8).

3. A steel strand testing machine according to claim 1, characterized in that: A slide rod (10) is fixedly installed on the hypotenuse side of the pressing block (4). The cross section of the slide rod (10) is T-shaped. A matching slide groove (11) is formed on the hypotenuse side of the inner wall of the tripod (2). The slide rod (10) is movably installed inside the slide groove (11).

4. The strand testing machine according to claim 1, characterized in that: An installation plate (12) is fixedly connected to the outside of the tripod (2). A stud (13) is fixedly installed on the surface of the workbench (1). The stud (13) movably penetrates through the installation plate (12). A bolt (14) is sleeved on the surface of the stud (13). The bolt (14) abuts against the surface of the installation plate (12).

5. A strand testing machine according to claim 1, characterized in that: A guide inclined groove (15) is formed on the lower surface of the pressing block (4). The inclination degree of the guide inclined groove (15) is the same as that of the hypotenuse of the pressing block (4). A roller member (16) is fixedly installed on the surface of the workbench (1).

6. The strand testing machine according to claim 1, wherein: The opposite sides of the tripod (2) are provided with arcs.

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