Hydraulic wedge-shaped clamp special for steel strand

Abstract

The utility model relates to the field of steel strand clamps, and discloses a special hydraulic wedge-shaped clamp for a steel strand, which comprises a clamp body, a piston is arranged on the inner surface of the clamp body, a Glyd ring is arranged on the surface of the piston, an end cover is arranged on the outer wall of the clamp body, a second screw is in threaded connection with the inner wall of the end cover, and the second screw is in threaded connection with the outer wall of the clamp body. The outer wall of the first screw is sleeved with a first gasket, the outer wall of the second screw is sleeved with a second gasket, the surface of the end cover is provided with a dustproof ring, the surface of the end cover is provided with an oil seal ring, the surface of the end cover is provided with a guide wear-resisting ring, the surface of the end cover is provided with an O-shaped ring, the surface of the clamp body is provided with a connector body, and the surface of the piston is provided with a limiting plate. A limiting nail is arranged on the inner surface of the limiting plate, and the inner wall of the limiting plate is in threaded connection with a first screw. According to the utility model, the clamping structure is arranged, so that a larger contact area with the sample is ensured, the clamping stability is ensured, and the clamping damage to the steel strand sample can be prevented.

Description

Technical Field

[0001] The utility model relates to the field of steel strand clamps, in particular to a hydraulic wedge clamp dedicated to steel strands. Background Art

[0002] Steel strand is a steel product composed of multiple steel wires twisted together. The surface can be coated with galvanized layers, zinc-aluminum alloy layers, aluminum-clad layers, copper-plated layers, epoxy resin coatings, etc. as needed. The main characteristics of steel strand are high strength, good relaxation performance, and it is relatively straight when unfolded. The core reason why steel strand needs to be tensile tested is to evaluate its mechanical properties and ensure that it meets the design and use requirements. The tensile test can obtain key indicators of steel strand such as tensile strength, yield strength, and elongation. These indicators are directly related to the safety and durability of steel strand in practical applications.

[0003] Specialized clamps for steel strands are primarily used for tensile testing of steel strands on torsion testing machines. Designed to minimize the increase in tensile capacity of the universal material testing machine, these clamps are engineered for ease of operation and reliability. They utilize a roller-type sliding design to minimize friction and prevent the clamp from locking and becoming inoperable after the strand breaks.

[0004] Steel strand is widely used in various construction industries. Its excellent mechanical properties and economical price make it widely used. Therefore, accurately knowing the mechanical parameters of steel strand is of vital importance to improving the processing technology of steel strand and enhancing its mechanical properties. The test standards and methods of steel strand determine the particularity of its dedicated clamp. With the change of steel strand size specifications, the clamping force and size of the clamp are required to be larger and larger. Manual clamps are difficult to meet the test requirements. Therefore, a hydraulic wedge clamp dedicated to steel strand is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a hydraulic wedge clamp dedicated to steel strands, which aims to improve the problem that the hydraulic wedge clamp dedicated to steel strands in the existing technology lacks the automatic clamping function for larger-sized steel strands, making it difficult to test the steel strands.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a hydraulic wedge clamp specially used for steel strand, comprising a clamping body, the inner surface of the clamping body is provided with a piston, the surface of the piston is provided with a grid ring, the outer wall of the clamping body is provided with an end cover, the inner wall of the end cover is threadedly connected with a screw 2, the outer wall of the screw 2 is sleeved with a gasket 2, the surface of the end cover is provided with a dust ring, the surface of the end cover is provided with an oil seal ring, the surface of the end cover is provided with a guide wear-resistant ring, the surface of the end cover is provided with an O-ring, the surface of the clamping body is provided with a joint body, the surface of the piston is provided with a limit plate, the limit plate A limiting nail is provided on the inner surface, and the inner wall of the limiting plate is threadedly connected to a screw one, and the outer wall of the screw one is sleeved with a washer one, the inner surface of the piston is provided with a magnetic steel, and the end face of the piston is fitted with a steel wire clamp, and the outer surface of the steel wire clamp is provided with a clamp guide plate, and the inner wall of the clamp guide plate is threadedly connected to a screw three, a connecting plate is provided on the surface of the clamp body, and the inner wall of the connecting plate is threadedly connected to the limiting screw, the surface of the steel wire clamp is threadedly connected to a hook, the surface of the clamp body is threadedly connected to a hanging ring, the outer surface of the hanging ring is provided with a tension spring, and the surface of the clamp body is threadedly connected to a lifting screw.

[0007] As a further description of the above technical solution:

[0008] The outer surface of the piston is adapted to the inner surface of the clamp body.

[0009] As a further description of the above technical solution:

[0010] A groove is provided on the surface of the steel strand clamp, and a boss is provided on the surface of the clamp guide plate. The inner surface of the steel strand clamp groove is matched with the outer surface of the boss of the clamp guide plate.

[0011] As a further description of the above technical solution:

[0012] The inner surface of the clamping body is wedge-shaped, the outer surface of the steel strand clamping block is wedge-shaped, and the wedge-shaped surface of the clamping body is matched with the wedge-shaped surface of the steel strand clamping block.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the screw three is threadedly connected to the inner wall of the clamp body, and the outer wall of the limit screw is threadedly connected to the inner wall of the clamp body.

[0015] As a further description of the above technical solution:

[0016] One end of the tension spring is sleeved on the outer wall of the hanging ring through a connecting ring, and the other end of the tension spring is sleeved on the outer wall of the hook through a connecting ring.

[0017] As a further description of the above technical solution:

[0018] The lifting screw is located on the outer wall of the clamp body close to one end of the connecting plate.

[0019] As a further description of the above technical solution:

[0020] The outer wall of the second screw is threadedly connected to the inner wall of the clamp body on one side close to the limiting plate.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present invention, the hydraulic oil can be introduced while ensuring dustproof sealing by providing a joint body, a piston, an oil seal ring, a dust ring, and a guide wear-resistant ring. The clamp body, the joint body, the steel strand clamp block, the clamp block guide plate, and the tension spring can clamp the steel strand through hydraulic pressure, ensuring a large contact area with the sample, ensuring stable clamping, and preventing damage to the steel strand sample.

[0023] 2. In the present invention, by providing the cooperation of the connecting plate, the limiting plate and the lifting screw, it is possible to ensure that the piston deflects during rotation, thereby ensuring the stability of the clamp body and facilitating the lifting and operation of the clamp body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a side view schematic diagram of the main structure of a hydraulic wedge clamp dedicated to steel strands proposed in the present invention;

[0025] Figure 2 This is a schematic diagram of a left-side cross-sectional view of the main structure of a hydraulic wedge-shaped clamp dedicated to steel strands proposed in the present invention;

[0026] Figure 3 This is a right side cross-sectional schematic diagram of the main structure of a hydraulic wedge clamp dedicated to steel strands proposed in the present invention;

[0027] Figure 4 This is a schematic diagram of the separation of the clamp body and the limit plate of a hydraulic wedge clamp specially designed for steel strands proposed by the present invention;

[0028] Figure 5 This is a schematic diagram of the main structure separation of a hydraulic wedge clamp dedicated to steel strands proposed in the present invention;

[0029] Figure 6 This is a schematic diagram of the partial structure separation of a hydraulic wedge clamp specially used for steel strands proposed in the present invention.

[0030] Legend:

[0031] 1. Clamp body; 2. Piston; 3. Dust seal; 4. Oil seal; 5. Guide wear ring; 6. Gly ring; 7. End cover; 8. Limit plate; 9. Limit pin; 10. Hanging ring; 11. Tension spring; 12. Connecting plate; 13. Strand clamp; 14. Clamp guide plate; 15. O-ring; 16. Connector body; 17. Limit screw; 18. Washer 1; 19. Screw 1; 20. Lifting screw; 21. Screw 2; 22. Washer 2; 24. Hook; 25. Screw 3; 26. Magnet. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clarify the technical solutions in the embodiments of the present invention; although it is clear that the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1-Figure 3The utility model provides an embodiment: a hydraulic wedge clamp dedicated to steel strands, comprising a clamp body 1, a piston 2 is provided on the inner surface of the clamp body 1, a grid ring 6 is provided on the surface of the piston 2, an annular groove is provided on the outer surface of the large cylinder in the middle of the piston 2, the grid ring 6 is embedded in the annular groove of the piston 2, an end cover 7 is provided on the outer wall of the clamp body 1, a screw 21 is threadedly connected to the inner wall of the end cover 7, a gasket 22 is provided on the outer wall of the screw 21, a dust ring 3 is provided on the surface of the end cover 7, an oil seal ring 4 is provided on the surface of the end cover 7, a guide wear-resistant ring 5 is provided on the surface of the end cover 7, and a dust ring 3 is provided on the surface of the end cover 7. The dust ring 3, the oil seal ring 4, and the guide wear-resistant ring 5 are respectively embedded in the inner grooves of the clamp body 1 and the end cover 7. The dust ring 3 is installed on the outermost side to isolate dust from falling into the inner cavity of the clamp body 1. The oil seal ring 4 is installed on the inner side of the dust ring 3 to prevent leakage of hydraulic oil and ensure the sealing of the clamp. The guide wear-resistant ring 5 is placed on the innermost side to ensure the guide positioning of the piston 2 during the movement. The surface of the end cover 7 is provided with an O-ring 15, and the surface of the clamp body 1 is provided with a joint body 16. The interior of the clamp body 1 is provided with a cavity. The joint body 16 and the cavity of the clamp body 1 are connected. The surface of the piston 2 is provided with a limited The inner surface of the limiting plate 8 is provided with a limiting nail 9, the inner wall of the limiting plate 8 is threadedly connected with a screw 19, the outer wall of the screw 19 is provided with a washer 18, the surface of the limiting plate 8 is provided with a boss, which is engaged with the square groove opened on the surface of the piston 2, the inner surface of the circular ring of the limiting plate 8 is matched with the outer cylindrical surface of the limiting nail 9, and the threaded end of the limiting nail 9 is connected to the end cover 7, providing a limit for the limiting plate 8 to prevent the piston 2 from deflecting, the inner surface of the piston 2 is provided with a magnetic steel 26, the end face of the piston 2 is fitted with a steel wire clamp 13, and the outer surface of the steel wire clamp 13 is provided with a clamp guide plate 1 4. The inner wall of the clamping block guide plate 14 is threadedly connected with a screw three 25, and a connecting plate 12 is provided on the surface of the clamp body 1. The inner wall of the connecting plate 12 is threadedly connected with a limit screw 17. The connecting plate 12 is fixed to the clamp body 1 by the limit screw 17, so that when a large stress is generated during the test process, the clamp body 1 is prevented from being deformed and damaged, thereby improving the reliability of the equipment. The surface of the steel strand clamping block 13 is threadedly connected with a hook 24, and the surface of the clamp body 1 is threadedly connected with a hanging ring 10. The outer surface of the hanging ring 10 is provided with a tension spring 11, and the surface of the clamp body 1 is threadedly connected with a lifting screw 20.

[0034] Reference Figure 3-Figure 6The outer surface of the piston 2 is adapted to the inner surface of the clamp body 1, and the outer wall of the screw three 25 is threadedly connected to the inner wall of the clamp body 1. The screw three 25 can fix the clamp block guide plate 14 on the outer wall of the clamp body 1, providing guidance for the steel wire clamp block 13 during clamping. The outer wall of the limit screw 17 is threadedly connected to the inner wall of the clamp body 1, one end of the tension spring 11 is sleeved on the outer wall of the hanging ring 10 through a connecting ring, and the other end of the tension spring 11 is sleeved on the outer wall of the hook 24 through a connecting ring. The tension spring 11 is connected to the clamp body 1 and the steel wire clamp block 13 through the connecting rings set at both ends. The lifting screw 20 is located on the outer wall of the clamp body 1 near one end of the connecting plate 12, and the outer wall of the screw two 21 is threadedly connected to the inner wall of the clamp body 1 on one side near the limit plate 8.

[0035] Reference Figure 3-Figure 6 The surface of the steel strand clamp 13 is provided with a groove, and the surface of the clamp guide plate 14 is provided with a boss. The inner surface of the steel strand clamp 13 groove is matched with the outer surface of the boss of the clamp guide plate 14. The inner surface of the clamp body 1 is wedge-shaped, and the outer surface of the steel strand clamp 13 is wedge-shaped. There are two groups of steel strand clamps 13, and the two groups of steel strand clamps 13 are mirror-imaged with the center point of the clamp body 1 as the axis of symmetry. The wedge-shaped surface of the clamp body 1 is matched with the wedge-shaped surface of the steel strand clamp 13. The length of the steel strand clamp 13 can ensure that the clamping length of the steel strand sample meets the test standard, and its tooth-shaped structure in contact with the sample is a thread. The thread structure can ensure a larger contact area for the sample and ensure the stability of the clamping, and the thread teeth can prevent the clamping of the steel strand sample from being damaged during the clamping process. The different thread sizes of the steel strand clamp 13 can meet the needs of steel strand samples of different specifications, and realize interchangeability.

[0036] Working principle: The sample is placed into the clamp body 1 through the through hole at the center of the connecting plate 12, and the hydraulic oil enters the inner cavity of the clamp body 1 through the joint body 16, and generates thrust by contacting the inner ring surface of the piston 2, forcing the piston 2 to move toward one end of the connecting plate 12. The lower surface of the steel strand clamp 13 contacts and cooperates with the piston 2, so it follows the displacement of the piston 2, and the wedge surface of the steel strand clamp 13 contacts and contacts the clamp body 1, and is guided by the clamp guide plate 14. Therefore, as the moving distance increases, the distance between the two steel strand clamps 13 becomes closer and closer, realizing the function of clamping the sample. At the same time, the tension spring 11 is stretched and deformed with the displacement of the steel strand clamp 13, and the tension spring 11 assists in quickly clamping and releasing the sample, thereby improving the efficiency of the test. Since the driving force is hydraulically driven, the clamping force is uniform and lasting. Finally, two sets of lifting screws 20 can lift the clamp body 1, making it convenient for the operator to safely move it to the designated position, especially when it needs to be installed at high altitude or a long distance, while reducing the risk and labor intensity of manual handling.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic wedge clamp for steel strand, characterized by: The invention comprises a clamp body (1), wherein the inner surface of the clamp body (1) is provided with a piston (2), the surface of the piston (2) is provided with a grid ring (6), the outer wall of the clamp body (1) is provided with an end cover (7), the inner wall of the end cover (7) is threadedly connected with a screw (21), the outer wall of the screw (21) is sleeved with a washer (22), the surface of the end cover (7) is provided with a dust ring (3), the surface of the end cover (7) is provided with an oil seal ring (4), the surface of the end cover (7) is provided with a guide wear-resistant ring (5), the surface of the end cover (7) is provided with an O-ring (15), the surface of the clamp body (1) is provided with a joint body (16), the surface of the piston (2) is provided with a limit plate (8), the inner surface of the limit plate (8) is provided with a limit pin (9), the inner wall of the limit plate (8 ... A screw (19) is connected, and a washer (18) is provided on the outer wall of the screw (19). A magnetic steel (26) is provided on the inner surface of the piston (2). A steel wire clamp (13) is attached to the end face of the piston (2). A clamp guide plate (14) is provided on the outer surface of the steel wire clamp (13). The inner wall of the clamp guide plate (14) is threadedly connected with a screw (25). A connecting plate (12) is provided on the surface of the clamp body (1). The inner wall of the connecting plate (12) is threadedly connected with a limit screw (17). The surface of the steel wire clamp (13) is threadedly connected with a hook (24). The surface of the clamp body (1) is threadedly connected with a hanging ring (10). The outer surface of the hanging ring (10) is provided with a tension spring (11). The surface of the clamp body (1) is threadedly connected with a lifting screw (20).

2. A hydraulic wedge clamp for steel strand according to claim 1, characterized in that: The outer surface of the piston (2) is adapted to the inner surface of the clamp body (1).

3. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: A groove is provided on the surface of the steel strand clamp (13), and a boss is provided on the surface of the clamp guide plate (14). The inner surface of the groove of the steel strand clamp (13) is adapted to the outer surface of the boss of the clamp guide plate (14).

4. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: The inner surface of the clamp body (1) is wedge-shaped, and the outer surface of the steel strand clamp block (13) is wedge-shaped. The wedge-shaped surface of the clamp body (1) is adapted to the wedge-shaped surface of the steel strand clamp block (13).

5. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: The outer wall of the screw three (25) is threadedly connected to the inner wall of the clamp body (1), and the outer wall of the limit screw (17) is threadedly connected to the inner wall of the clamp body (1).

6. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: One end of the tension spring (11) is sleeved on the outer wall of the hanging ring (10) through a connecting ring, and the other end of the tension spring (11) is sleeved on the outer wall of the hook (24) through a connecting ring.

7. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: The lifting screw (20) is located on the outer wall of the clamp body (1) close to one end of the connecting plate (12).

8. The hydraulic wedge clamp for steel strand according to claim 1, characterized in that: The outer wall of the second screw (21) is threadedly connected to the inner wall of the clamp body (1) on one side close to the limiting plate (8).

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