Clamping piece for tensile test of steel strand

Abstract

The utility model discloses a clamping piece for a tensile test of a steel strand, and relates to the technical field of steel strand detection.The clamping piece comprises an upper clamp mechanism and a lower clamp mechanism, the upper clamp mechanism comprises an upper clamp of a semicircular structure, and two symmetrically-arranged connecting assemblies are installed on the outer wall of the upper clamp; a plurality of protection protrusions distributed at equal intervals are fixedly connected to the inner wall of the upper clamp, the lower clamp mechanism comprises a lower clamp of a semicircular structure, and a pressing assembly is installed on the outer wall of the lower clamp. According to the steel strand stretching device, the arc-shaped seat is arranged in the lower clamp mechanism, the pressing assembly is matched with the arc-shaped seat, a steel strand can be conveniently pressed and fixed, meanwhile, the arc-shaped seat is matched with the upper clamp, the effective contact area with the steel strand is increased, and the situation that the steel strand slips during stretching is effectively avoided.

Description

Technical Field

[0001] The present application relates to the technical field of steel strand detection, and in particular to a clip for steel strand tensile testing. Background Art

[0002] Steel strand is a steel product composed of multiple steel wires twisted together. The carbon steel surface can be coated with galvanized layer, zinc-aluminum alloy layer, aluminum clad layer, copper plating layer, epoxy resin coating, etc. as needed. After the steel strand is produced, a series of tests are required to determine whether the produced steel strand is qualified. The tensile strength test is an important test step.

[0003] After searching, the Chinese patent publication number CN217738838U discloses an anti-slip clip for tensile testing of steel strands, including a clamping head installed on a tensile testing machine and used to clamp the steel strands, the clamping head including an upper clamping head and a lower clamping head, the upper clamping head and the lower clamping head cooperate to form a circle, and the inner sides of the upper clamping head and the lower clamping head are provided with anti-slip sheets to prevent the steel strands from slipping.

[0004] The anti-slip clip for steel strand tensile testing in the above patent has the following shortcomings: in the above patent, the steel strand is compressed by two upper and lower clamps, but in actual use, due to the different diameters of the steel strands, the effective contact area between the upper and lower clamps and the steel strands is small, which makes it easy for the steel strand to slip during the clamping process. Utility Model Content

[0005] In order to improve the problem that existing steel strand clamps are prone to slipping, the present application provides a clamp for steel strand tensile testing.

[0006] The present application provides a clamp for tensile testing of steel strands, comprising an upper clamp mechanism and a lower clamp mechanism, the upper clamp mechanism comprising an upper clamp of a semicircular structure, and two symmetrically arranged connecting components are installed on the outer wall of the upper clamp, the inner wall of the upper clamp is fixedly connected with a plurality of equally spaced protective protrusions, and the lower clamp mechanism comprises a lower clamp of a semicircular structure, and a clamping component is installed on the outer wall of the lower clamp.

[0007] By adopting the above structure, the cooperation between the upper clamp mechanism and the lower clamp mechanism can facilitate the compression and fixation of the steel strand. The upper and lower clamps of the semicircular structure in the upper clamp mechanism and the lower clamp mechanism facilitate direct compression of the steel strand. The setting of the protective protrusion can increase the friction between the steel strand and the clamp.

[0008] An arc-shaped seat is provided on the outer wall of the top of the lower clamp, and the arc-shaped seat is connected to the pressing assembly.

[0009] By adopting the above structure, the arc seat is directly driven to move through the setting of the pressing assembly, thereby conveniently pressing the steel strand directly in the upper clamp.

[0010] The pressing assembly includes a pressing box fixedly connected to the outer wall of the lower clamp, and the inner wall of the pressing box is fixedly connected to two symmetrically arranged fixing rods, and the outer walls of the two fixing rods are slidably connected to the same sliding plate.

[0011] By adopting the above structure, the arrangement of the pressing box facilitates the installation of the pressing assembly on the lower fixture, and the arrangement of the two fixing rods in the pressing box facilitates the sliding installation of the sliding plate.

[0012] The outer wall of the top of the sliding plate is fixedly connected with a driving seat, and the driving seat passes through the lower clamp and is fixed on the arc seat.

[0013] By adopting the above structure, when the sliding plate slides, it is convenient to directly drive the arc seat to move through the driving seat, and the arc seat can be adjusted to facilitate the compression of the steel strand.

[0014] The inner walls on both sides of the compression box are rotatably connected to the same bidirectional screw, and the outer wall of the bidirectional screw is screwed to two symmetrically arranged threaded sleeves, the outer walls of the two threaded sleeves are rotatably connected to connecting plates, and one end of the two connecting plates is rotatably connected to the sliding plate, the outer wall of one side of the compression box is rotatably connected to a rotating part, and one end of the transmission shaft of the rotating part is fixedly connected to the bidirectional screw.

[0015] By adopting the above structure, the bidirectional screw can be conveniently rotated and installed through the setting of the compression box, and the setting of the rotating part can directly drive the bidirectional screw to rotate. When the bidirectional screw rotates, it directly drives the two threaded sleeves to move. When the two threaded sleeves move toward or away from each other, it is convenient to directly pull the sliding plate through the connecting plate, thereby facilitating the compression of the steel strand.

[0016] The connecting assembly includes a connecting column that passes through and is fixedly connected to the upper clamp, and an installation cavity is opened on the inner wall of the connecting column. The inner wall of the installation cavity is rotatably connected to a screw rod, and the outer wall of the screw rod is screwed with a trapezoidal block.

[0017] By adopting the above structure, the connection assembly can be conveniently fixed on the upper fixture through the setting of the connection column, the opening of the installation cavity can facilitate the installation of the screw, and the screw can directly drive the trapezoidal block to move when it rotates.

[0018] The outer walls on both sides of the trapezoidal block are slidably connected to sliding blocks, and the outer walls of the two sliding blocks are rotatably connected to support plates. The inner walls on both sides of the installation cavity are provided with openings, and the inner walls of the two openings are rotatably connected to limit plates, and one end of the two support plates is rotatably connected to the two limit plates respectively.

[0019] By adopting the above structure, when the trapezoidal block moves, it is convenient to directly cooperate with the sliding block and the supporting plate to drive the two limit plates to move.

[0020] The top outer wall of the connecting column is rotatably connected to a rotating disk, and one end of the rotating disk transmission shaft is fixedly connected to the screw. The top outer wall of the lower clamp is provided with two symmetrical circular openings, and the specifications of the circular openings match those of the connecting column.

[0021] By adopting the above structure, the rotation of the rotating disk directly drives the screw to rotate, and the rotation of the screw directly drives the trapezoidal block to move. The movement of the trapezoidal block is convenient for directly adjusting the positions of the two limit plates.

[0022] In summary, the beneficial effects of this application are as follows:

[0023] 1. This application facilitates the compression and fixation of the steel strand by providing an arc seat in the lower clamp mechanism, and the cooperation between the clamping assembly and the arc seat. At the same time, the arc seat cooperates with the upper clamp to increase the effective contact area with the steel strand, effectively preventing the steel strand from slipping when being stretched.

[0024] 2. This application facilitates the direct driving of the driving seat to drive the arc seat to move by setting a bidirectional screw, a threaded sleeve, a connecting plate and a sliding plate in the compression assembly, and connects the upper and lower clamps through the setting of the connecting assembly, thereby facilitating the compression of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the entire application;

[0026] Figure 2 It is a schematic diagram of the clamp mechanism of this application;

[0027] Figure 3 It is a schematic diagram of the clamp mechanism under this application;

[0028] Figure 4 It is a schematic cross-sectional view of the clamping assembly of the present application;

[0029] Figure 5 It is a cross-sectional schematic diagram of the connection components of this application.

[0030] Explanation of the accompanying drawings: 1. Upper clamp mechanism; 2. Lower clamp mechanism; 3. Upper clamp; 4. Protective protrusion; 5. Connecting assembly; 6. Lower clamp; 7. Clamping assembly; 8. Arc seat; 9. Clamping box; 10. Fixed rod; 11. Sliding plate; 12. Driving seat; 13. Connecting plate; 14. Bidirectional screw; 15. Threaded sleeve; 16. Rotating part; 17. Connecting column; 18. Rotating disk; 19. Mounting cavity; 20. Screw; 21. Trapezoidal block; 22. Sliding block; 23. Support plate; 24. Limiting plate. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] See also Figure 1-3 A clamp for tensile testing of steel strands. Steel strands are steel products composed of multiple steel wires twisted together. The carbon steel surface can be coated with galvanized layers, zinc-aluminum alloy layers, aluminum-clad layers, copper-plated layers, epoxy resin coatings, etc. as needed. After the production of steel strands is completed, they need to be subjected to tensile testing. During the tensile testing of steel strands, the two ends of the steel strands need to be clamped by clamps. During the actual operation, the clamps are prone to slippage due to problems with the clamps. Therefore, a solution to the slippage of steel strands is proposed, including an upper clamp mechanism 1 and a lower clamp mechanism 2. The upper clamp mechanism The structure 1 includes an upper clamp 3 with a semicircular structure, and the outer wall of the upper clamp 3 is equipped with two symmetrically arranged connecting components 5, and the inner wall of the upper clamp 3 is fixedly connected with a plurality of equally distributed protective protrusions 4. The setting of the upper clamp 3 and the protective protrusions 4 increases the friction with the steel strand, thereby preventing the steel strand from slipping. The protective protrusions 4 are made of rubber. The lower clamp mechanism 2 includes a lower clamp 6 with a semicircular structure, and the outer wall of the lower clamp 6 is equipped with a clamping component 7. The clamping component 7 is arranged on the lower clamp 6 to facilitate the clamping and fixing of the auxiliary steel strand.

[0033] When in use, the steel strand can be compressed and fixed conveniently through the cooperation between the upper clamp mechanism 1 and the lower clamp mechanism 2. The upper and lower clamps of the semicircular structure in the upper clamp mechanism 1 and the lower clamp mechanism 2 can directly compress the steel strand conveniently. The setting of the protective protrusion 4 can increase the friction between the steel strand and the clamp.

[0034] Reference Figure 3 An arc-shaped seat 8 is provided on the top outer wall of the lower clamp 6. The setting of the arc-shaped seat 8 is convenient for directly compacting the steel strand, which expands the effective compacting area of the steel strand, and the arc-shaped seat 8 is connected to the compacting component 7. The setting of the compacting component 7 is convenient for directly adjusting the position of the arc-shaped seat 8, thereby facilitating compacting the steel strand. The arc-shaped seat 8 is directly driven to move through the setting of the compacting component 7, thereby facilitating directly compacting the steel strand in the upper clamp 3.

[0035] Reference Figure 3 and Figure 4The clamping assembly 7 includes a clamping box 9 fixedly connected to the outer wall of the lower clamp 6. The clamping box 9 fixes the clamping assembly 7 to the lower clamp 6, and the inner wall of the clamping box 9 is fixedly connected to two symmetrically arranged fixing rods 10. The outer walls of the two fixing rods 10 are slidably connected to the same sliding plate 11. The setting of the fixing rods 10 is convenient for limiting the sliding trajectory of the sliding plate 11 to avoid offset when the sliding plate 11 slides. The setting of the clamping box 9 facilitates the installation of the clamping assembly 7 on the lower clamp 6, and the setting of the two fixing rods 10 in the clamping box 9 facilitates the sliding installation of the sliding plate 11.

[0036] Reference Figure 4 The top outer wall of the sliding plate 11 is fixedly connected to a driving seat 12, and the driving seat 12 passes through the lower clamp 6 and is fixed on the arc seat 8. During the sliding process, the sliding plate 11 cooperates with the driving seat 12 to drive the arc seat 8 to be pressed tightly on the steel strand. When the sliding plate 11 slides, it is convenient to directly drive the arc seat 8 to move through the driving seat 12, and the arc seat 8 can be adjusted to facilitate the compression of the steel strand.

[0037] Reference Figure 4 , the inner walls of both sides of the compression box 9 are rotatably connected with the same bidirectional screw 14, and the outer wall of the bidirectional screw 14 is screwed with two symmetrically arranged threaded sleeves 15, and the midpoint of the bidirectional screw 14 is rotatably connected to a support seat, which is fixed in the compression box 9. When the bidirectional screw 14 rotates, it directly drives the two threaded sleeves 15 to move toward or away from each other. The outer walls of the two threaded sleeves 15 are rotatably connected with a connecting plate 13, and one end of the two connecting plates 13 is rotatably connected to the sliding plate 11. When the bidirectional screw 14 rotates, the two threaded sleeves 15 are driven to move toward each other, and the sliding plate 11 is directly driven up through the connecting plate 13. Conversely, when the two threaded sleeves 15 move away from each other, they are directly driven up through The sliding plate 11 is driven downward by the connecting plate 13, and the outer wall of one side of the compression box 9 is rotatably connected to a rotating part 16. The cross-section of the rotating part 16 is a regular hexagon, which is convenient for cooperating with a socket wrench to directly drive the rotating part 16 to rotate, and one end of the transmission shaft of the rotating part 16 is fixedly connected to the bidirectional screw 14. The setting of the compression box 9 facilitates the rotation and installation of the bidirectional screw 14. The setting of the rotating part 16 facilitates the direct rotation of the bidirectional screw 14. When the bidirectional screw 14 rotates, it directly drives the two threaded sleeves 15 to move. When the two threaded sleeves 15 move toward or away from each other, it is convenient to directly pull the sliding plate 11 through the connecting plate 13, thereby facilitating the compression of the steel strand.

[0038] Reference Figure 5The connecting component 5 includes a connecting column 17 that passes through and is fixedly connected to the upper clamp 3. The connecting column 17 is fixed on the upper clamp 3, and an installation cavity 19 is opened on the inner wall of the connecting column 17. The inner wall of the installation cavity 19 is rotatably connected to a screw 20. The setting of the installation cavity 19 facilitates the rotational installation of the screw 20. The outer wall of the screw 20 is screwed with a trapezoidal block 21. When the screw 20 rotates, it is convenient to directly drive the trapezoidal block 21 to move. The setting of the connecting column 17 facilitates the fixing of the connecting component 5 on the upper clamp 3. The opening of the installation cavity 19 facilitates the installation of the screw 20. When the screw 20 rotates, it is convenient to directly drive the trapezoidal block 21 to move.

[0039] Reference Figure 5 The outer walls of both sides of the trapezoidal block 21 are slidably connected with sliding blocks 22, and the outer walls of the two sliding blocks 22 are rotatably connected with support plates 23. Through the cooperation between the sliding blocks 22 and the support plates 23, the trapezoidal block 21 can be effectively restricted from rotating with the screw 20. The inner walls of both sides of the mounting cavity 19 are provided with openings, and the inner walls of the two openings are rotatably connected to the limiting plates 24. One end of the two support plates 23 is rotatably connected to the two limiting plates 24 respectively. The special structure of the trapezoidal block 21 directly drives the two limiting plates 24 to move toward or away from each other when it moves. When the two limiting plates 24 move away from each other, the lower clamp 6 can be effectively prevented from separating from the connecting column 17. When the trapezoidal block 21 moves, it is convenient to directly cooperate with the sliding block 22 and the support plate 23 to drive the two limiting plates 24 to move.

[0040] Reference Figure 5 The top outer wall of the connecting column 17 is rotatably connected to a rotating disk 18, and one end of the transmission shaft of the rotating disk 18 is fixedly connected to the screw 20. The setting of the rotating disk 18 is convenient for directly manually driving the screw 20 to rotate, and then conveniently adjusting the position of the two limit plates 24, so as to facilitate the connection and fixation of the upper clamp 3 and the lower clamp 6. The top outer wall of the lower clamp 6 is provided with two symmetrical circular openings, and the specifications of the circular openings match the specifications of the connecting column 17. When the rotating disk 18 rotates, the screw 20 is directly driven to rotate, and when the screw 20 rotates, the trapezoidal block 21 is directly driven to move. The movement of the trapezoidal block 21 facilitates the direct adjustment of the position of the two limit plates 24.

[0041] When the two threaded sleeves 15 move toward each other, they directly drive the sliding plate 11 to move upward through the connecting plate 13. When the sliding plate 11 moves upward, it directly drives the arc seat 8 to be pressed on the steel strand, thereby facilitating the compression and fixing of the steel strand.

[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A clamp for a steel strand tensile test, comprising an upper clamp mechanism (1) and a lower clamp mechanism (2), characterized in that: The upper clamp mechanism (1) comprises an upper clamp (3) with a semicircular structure, and the outer wall of the upper clamp (3) is equipped with two symmetrically arranged connecting components (5), and the inner wall of the upper clamp (3) is fixedly connected with a plurality of equally spaced protective protrusions (4), and the lower clamp mechanism (2) comprises a lower clamp (6) with a semicircular structure, and the outer wall of the lower clamp (6) is equipped with a pressing component (7).

2. A clip for steel strand tensile testing according to claim 1, characterized in that: An arc-shaped seat (8) is provided on the top outer wall of the lower clamp (6), and the arc-shaped seat (8) is connected to the pressing assembly (7).

3. A clip for steel strand tensile testing according to claim 2, characterized in that: The pressing assembly (7) includes a pressing box (9) fixedly connected to the outer wall of the lower clamp (6), and the inner wall of the pressing box (9) is fixedly connected to two symmetrically arranged fixing rods (10), and the outer walls of the two fixing rods (10) are slidably connected to the same sliding plate (11).

4. A clip for steel strand tensile testing according to claim 3, characterized in that: The top outer wall of the sliding plate (11) is fixedly connected to a driving seat (12), and the driving seat (12) passes through the lower clamp (6) and is fixed on the arc seat (8).

5. The clip for steel strand tensile testing according to claim 4, characterized in that: The inner walls of both sides of the compression box (9) are rotatably connected to the same bidirectional screw (14), and the outer wall of the bidirectional screw (14) is screwed to two symmetrically arranged threaded sleeves (15), the outer walls of the two threaded sleeves (15) are rotatably connected to the connecting plates (13), and one end of the two connecting plates (13) is rotatably connected to the sliding plate (11), and the outer wall of one side of the compression box (9) is rotatably connected to the rotating part (16), and one end of the transmission shaft of the rotating part (16) is fixedly connected to the bidirectional screw (14).

6. The clip for steel strand tensile testing according to claim 5, characterized in that: The connecting assembly (5) comprises a connecting column (17) which is fixedly connected to the upper clamp (3), and an installation cavity (19) is provided on the inner wall of the connecting column (17). A screw (20) is rotatably connected to the inner wall of the installation cavity (19), and a trapezoidal block (21) is screwed to the outer wall of the screw (20).

7. The clip for steel strand tensile testing according to claim 6, characterized in that: The outer walls on both sides of the trapezoidal block (21) are slidably connected to the sliding blocks (22), and the outer walls of the two sliding blocks (22) are rotatably connected to the support plates (23). The inner walls on both sides of the installation cavity (19) are provided with openings, and the inner walls of the two openings are rotatably connected to the limit plates (24). One end of the two support plates (23) is rotatably connected to the two limit plates (24).

8. The clip for steel strand tensile testing according to claim 7, characterized in that: The top outer wall of the connecting column (17) is rotatably connected to a rotating disk (18), and one end of the transmission shaft of the rotating disk (18) is fixedly connected to the screw (20). The top outer wall of the lower clamp (6) is provided with two symmetrical circular openings, and the specifications of the circular openings match the specifications of the connecting column (17).

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