Clamp for tensile test of steel strand

Abstract

The clamp comprises a support base, a supporting plate and a support top plate, the supporting plate is located between the support base and the support top plate and fixedly connected with the support base and the support top plate, and the support base, the support top plate and the supporting plate form a frame with an opening in one side. A support rod is fixedly installed on one side of the upper end of the support base. The clamp has the beneficial effects that the clamp assembly consisting of the upper clamp body, the lower clamp body, the wear-resistant clamping seat and the anti-slip rubber seat is arranged, so that the clamp structure adopts a hard clamping structure and a soft clamping structure which are matched with each other, and double clamping, anti-slip and limiting effects with different properties can be provided for the steel strand; meanwhile, the stress points and the stress modes are increased, the stability of the clamping effect is ensured, abrasion or falling is not likely to happen, and in addition, when the abrasion phenomenon happens, disassembly, assembly and replacement can be conveniently carried out.

Description

Technical Field

[0001] The utility model relates to the field of clamps, in particular to a clamp for tensile testing of steel strands. 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, etc. as needed.

[0003] When conducting tensile tests on steel strands, an annular clamp device is usually required to tighten and limit them. Most existing annular clamp devices are composed of two semi-annular structures combined together, in which the steel strand can be placed and tightened to each other to achieve the purpose of limiting clamping. Such a clamp structure usually only adopts a single anti-slip structure, such as relying solely on the wear-resistant and anti-slip layer of the clamping surface to fit the outer wall of the steel strand and apply a certain pressure to produce a corresponding anti-slip effect. Although the tightening and clamping effect can be achieved, its force-bearing structure is single, prone to wear, and it is not convenient to quickly replace after wear. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a steel strand tensile test fixture that adopts multiple groups of hard clamping and wear-resistant clamping seats with different anti-slip structures that can be disassembled and assembled, and is matched with multiple groups of soft clamping anti-slip rubber seats to ensure the clamping effect and stability.

[0005] The present invention is realized through the following technical scheme: The present invention proposes a clamp for tensile testing of steel strands, comprising a bracket base, a support plate and a bracket top plate, the support plate being located between the bracket base and the bracket top plate and being fixedly connected, the bracket base, the bracket top plate and the support plate forming an open frame on one side, a support rod being fixedly mounted on one side of the upper end of the bracket base, a hydraulic telescopic rod being fixedly mounted at a position corresponding to the support rod on the lower end of the bracket top plate, a clamp assembly being arranged between the support rod and the hydraulic telescopic rod, the hydraulic telescopic rod driving the clamp assembly to open and close through its extension or contraction movement, and the clamp assembly having a built-in hard clamping seat and a soft clamping seat.

[0006] By adopting the above technical solution, the hard clamping seat and the soft clamping seat can enable the clamp assembly to have dual clamping and anti-slip effects of different properties, which can effectively improve the clamping stability of the clamp assembly.

[0007] Furthermore, the clamp assembly consists of two parts: an upper clamping body and a lower clamping body. The upper clamping body is fixedly installed on the bottom end of the hydraulic telescopic rod, and the lower clamping body is fixedly installed on the top end of the support rod.

[0008] By adopting the technical scheme, the upper clamp is driven to displace by the hydraulic telescopic rod, and the clamping operation is completed by the upper clamp and the lower clamp.

[0009] Further, the hard clamping seat is a wear-resistant clamping seat arranged on the side wall adjacent to the upper clamp and the lower clamp, and the soft clamping seat is a skid-resistant rubber seat arranged on the side wall adjacent to the upper clamp and the lower clamp, the clamping end face of the skid-resistant rubber seat is higher than that of the wear-resistant clamping seat, and the wear-resistant clamping seat and the skid-resistant rubber seat can be disassembled.

[0010] By adopting the technical scheme, the wear-resistant clamping seat can provide a hard clamping effect for the clamp assembly, and the skid-resistant rubber seat can provide a soft clamping effect for the clamp assembly.

[0011] Further, the wear-resistant clamping seat is formed with an embedded protrusion at the connection with the upper clamp and the lower clamp, the upper clamp and the lower clamp are each provided with an embedded groove corresponding to the embedded protrusion, and the wear-resistant clamping seat is connected to the upper clamp and the lower clamp in a detachable manner through the embedded protrusion.

[0012] By adopting the technical scheme, the wear-resistant clamping seat can be conveniently disassembled and replaced after being worn.

[0013] Further, the skid-resistant rubber seat is formed with an inserted protrusion on the side wall adjacent to the wear-resistant clamping seat, the wear-resistant clamping seat is provided with an inserted groove at the connection end with the inserted protrusion, and the skid-resistant rubber seat is connected to the wear-resistant clamping seat in a detachable manner through the inserted protrusion.

[0014] By adopting the technical scheme, the skid-resistant rubber seat can be conveniently disassembled and replaced after being worn.

[0015] Further, the wear-resistant clamping seat has three structures, i.e., a wear-resistant clamping seat with a longitudinal skid-resistant protrusion on the clamping face, a wear-resistant clamping seat with a transverse skid-resistant protrusion on the clamping face, and a wear-resistant clamping seat with a frosted skid-resistant layer on the clamping face, and the three structures are arranged in sequence.

[0016] By adopting the technical scheme, the wear-resistant clamping seat with three different skid-resistant styles can produce three different skid-resistant effects, so as to increase the clamping stress points or stress areas of the clamp assembly on the steel strand.

[0017] Further, the clamping face of the skid-resistant rubber seat has a rubber skid-resistant protrusion.

[0018] By adopting the above technical solution, the rubber anti-slip protrusion can further enhance the anti-slip effect of the anti-slip rubber seat.

[0019] Furthermore, both ends of the anti-slip rubber seat are formed with extended protrusions.

[0020] By adopting the above technical solution, the extended protrusion can cause the anti-slip rubber seat to deform, expand and dilate when squeezed, thereby further enhancing the clamping effect of the anti-slip rubber seat on the steel strand.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The utility model provides a clamp assembly consisting of an upper clamping body, a lower clamping body, a wear-resistant clamping seat, and an anti-slip rubber seat. The clamp structure can adopt a hard clamping structure and a soft clamping structure to cooperate with each other, so that it can provide dual clamping and anti-slip limiting effects of different properties for the steel strand, while increasing its force points and force methods, ensuring the stability of its clamping effect, and not easily causing wear or falling off. In addition, when wear occurs, it can also be conveniently disassembled and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of a fixture for tensile testing of steel strands according to the present invention;

[0024] Figure 2 This is a left side view of a fixture for tensile testing of steel strands according to the present invention;

[0025] Figure 3 This is a schematic structural diagram of a steel strand separation fixture for steel strand tensile testing according to the present invention;

[0026] Figure 4 This is a cross-sectional view of a fixture assembly in a fixture for tensile testing of steel strands described in the present invention;

[0027] Figure 5 This is a fixture for tensile testing of steel strands described in this utility model. Figure 4 A magnified view of the structure in the middle.

[0028] The following are the descriptions of the reference numerals:

[0029] 1. Bracket base; 2. Support plate; 3. Bracket top plate; 4. Support rod; 5. Hydraulic telescopic rod; 6. Clamp assembly; 7. Steel strand; 601. Upper clamping concrete; 602. Lower clamping concrete; 603. Wear-resistant clamping seat; 604. Anti-slip rubber seat; 605. Embedded protrusion; 606. Embedded groove; 607. Plug-in protrusion; 608. Plug-in groove; 609. Extension protrusion. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figure 1-Figure 3 As shown, a fixture for tensile testing of steel strands in this embodiment includes a bracket base 1, a support plate 2 and a bracket top plate 3. The support plate 2 is located between the bracket base 1 and the bracket top plate 3 and is fixedly connected. The bracket base 1, the bracket top plate 3 and the support plate 2 constitute an open frame on one side. A support rod 4 is fixedly installed on one side of the upper end of the bracket base 1, and a hydraulic telescopic rod 5 is fixedly installed at the lower end of the bracket top plate 3 corresponding to the support rod 4. A clamp assembly 6 is arranged between the support rod 4 and the hydraulic telescopic rod 5. The hydraulic telescopic rod 5 drives the clamp assembly 6 to open and close through its extension or contraction movement. The clamp assembly 6 has a built-in hard clamping seat and a soft clamping seat.

[0032] The embodiment of the present application provides a steel strand tensile test fixture that uses multiple sets of hard-clamping wear-resistant clamping seats with different anti-slip structures that can be disassembled and assembled, and is matched with multiple sets of soft-clamping anti-slip rubber seats to ensure the clamping effect and stability. This solves the problem that the fixture structure in the prior art usually only relies on the wear-resistant and anti-slip layer of the clamping surface to fit the outer wall surface of the steel strand and apply a certain pressure to produce the corresponding anti-slip effect. Although the tightening clamping effect can be achieved, its force-bearing structure is single, it is prone to wear, and it is inconvenient to use after wear. Regarding the problem of quick replacement, the overall idea of ​​this embodiment to solve the above problem is: by setting a hydraulic telescopic rod 5 to control the opening and closing management of the clamp assembly 6, the hard clamping seat inside the clamping assembly 6 realizes a hard clamping effect on the outer wall of the steel strand, and the soft clamping seat realizes a soft clamping effect on the outside of the steel strand. Therefore, the clamp assembly 6 can provide hard and soft clamping and limiting fixing effects on the steel strand at the same time, improve the diversity of the clamping and anti-slip effects, ensure that the clamping and anti-slip effects are stable, and not prone to falling off or wear.

[0033] like Figure 2-Figure 4 As shown, the clamp assembly 6 consists of two parts: an upper clamping body 601 and a lower clamping body 602. The upper clamping body 601 is fixedly mounted on the bottom end of the hydraulic telescopic rod 5, and the lower clamping body 602 is fixedly mounted on the top end of the support rod 4;

[0034] As an embodiment, the hydraulic telescopic rod 5 can drive the upper clamping body 601 to undergo displacement adjustment by extending or contracting. When the steel strand needs to be clamped and limited, the hydraulic telescopic rod 5 extends, driving the lower clamping body 601 to move downward, and cooperates with the lower clamping body 602 to clamp and limit the steel strand. When the limit fixation is released, the hydraulic telescopic rod 5 contracts, driving the upper clamping body 602 to move upward and separate from the lower clamping body 602, thereby releasing the clamping and limiting effect on the steel strand.

[0035] like Figure 3-Figure 5 As shown, the hard clamping seat is a wear-resistant clamping seat 603 arranged and distributed on the side walls adjacent to the upper clamping body 601 and the lower clamping body 602, and the soft clamping seat is an anti-slip rubber seat 604 arranged and distributed on the side walls adjacent to the upper clamping body 601 and the lower clamping body 602. The clamping end surface of the anti-slip rubber seat 604 is higher than the wear-resistant clamping seat 603. Both the wear-resistant clamping seat 603 and the anti-slip rubber seat 604 can be disassembled;

[0036] As an embodiment, the wear-resistant clamping seat 603 can make the closure of the upper clamping body 601 and the lower clamping body 602 have a hard clamping effect, and the anti-slip rubber seat 604 can make the closure of the upper clamping body 601 and the lower clamping body 602 have a soft clamping effect, thereby improving the diversity of the clamping and anti-slip effects of the clamp assembly 6 and increasing the stability of its clamping effect. The clamping end face of the anti-slip rubber seat 604 is higher than the wear-resistant clamping seat 603, so that the anti-slip rubber seat 604 can be deformed after being squeezed and stressed by the steel strand, so that it can more closely establish a friction and anti-slip effect with the steel strand.

[0037] like Figure 4 and Figure 5 As shown, the connection between the wear-resistant clamping seat 603 and the upper clamping body 601 and the lower clamping body 602 is formed with an engaging protrusion 605, and the upper clamping body 601 and the lower clamping body 602 are provided with an embedding groove 606 corresponding to the engaging protrusion 605. The wear-resistant clamping seat 603 establishes a detachable connection relationship with the upper clamping body 601 and the lower clamping body 602 through the engaging protrusion 605;

[0038] As an embodiment, the interlocking protrusion 605 and the embedding groove 606 cooperate with each other so that the wear-resistant clamping seat 603 can establish a stable detachable connection relationship with the upper clamping body 601 and the lower clamping body 602, so that the wear-resistant clamping seat 603 can be easily disassembled and replaced by the staff after wear occurs.

[0039] like Figure 4 and Figure 5As shown, a plug-in protrusion 607 is formed on the side wall of the anti-slip rubber seat 604 adjacent to the wear-resistant clamping seat 603, and a plug-in groove 608 is formed at the connecting end of the wear-resistant clamping seat 603 and the plug-in protrusion 607. The anti-slip rubber seat 604 establishes a detachable connection relationship with the wear-resistant clamping seat through the plug-in protrusion 607;

[0040] As an embodiment, the plug-in protrusion 607 and the plug-in groove 608 cooperate with each other, so that the anti-slip rubber seat 604 can establish a stable detachable connection relationship with the wear-resistant clamping seat 603, so that the anti-slip rubber seat 604 can be easily disassembled and replaced by the staff after wear occurs.

[0041] like Figure 4 and Figure 5 As shown, the wear-resistant clamping seat 603 has three structures: a wear-resistant clamping seat 603 with longitudinal anti-slip protrusions on the clamping surface, a wear-resistant clamping seat 603 with transverse anti-slip protrusions on the clamping surface, and a wear-resistant clamping seat 603 with a frosted anti-slip layer on the clamping surface. The wear-resistant clamping seat 603 with longitudinal anti-slip protrusions on the clamping surface, the wear-resistant clamping seat 603 with transverse anti-slip protrusions on the clamping surface, and the wear-resistant clamping seat 603 with a frosted anti-slip layer on the clamping surface are arranged in sequence;

[0042] As an embodiment, the wear-resistant clamping seat 603 with three different anti-slip structures can provide three different anti-slip clamping effects for the steel strand, so that the wear-resistant clamping seat 603 can provide more force-bearing methods for the steel strand under its hard clamping condition, thereby enhancing the stability of its clamping effect.

[0043] like Figure 4 and Figure 5 As shown, the clamping surface of the anti-slip rubber seat 604 has rubber anti-slip protrusions;

[0044] As an implementation method, the rubber anti-slip protrusions can further enhance the friction force points of the anti-slip rubber seat 604 , thereby enhancing the stability of its clamping effect.

[0045] like Figure 4-Figure 5 As shown, both ends of the anti-slip rubber seat 604 are formed with extended protrusions 609;

[0046] As an embodiment, the extended protrusions 609 located at both ends of the anti-slip rubber seat 604 will be squeezed against each other under the drive of the upper clamping body 601 and the lower clamping body 602, so that the overall volume of the anti-slip rubber seat 604 will deform, expand, and expand, thereby further filling the gap between the contact surface of the anti-slip rubber seat 604 and the outer wall of the steel strand, thereby effectively enhancing the force effect of the anti-slip rubber seat 604 and improving its clamping stability.

[0047] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixture for tensile testing of steel strands, characterized by: The invention comprises a support base (1), a support plate (2) and a support top plate (3), wherein the support plate (2) is located between the support base (1) and the support top plate (3) and is fixedly connected to each other, wherein the support base (1), the support top plate (3) and the support plate (2) form an open frame on one side, a support rod (4) is fixedly installed on one side of the upper end of the support base (1), a hydraulic telescopic rod (5) is fixedly installed at the lower end of the support top plate (3) corresponding to the support rod (4), a clamp assembly (6) is provided between the support rod (4) and the hydraulic telescopic rod (5), and the hydraulic telescopic rod (5) drives the clamp assembly (6) to open and close by its extension or contraction movement, and the clamp assembly (6) is built with a hard clamping seat and a soft clamping seat.

2. A steel strand tensile test fixture according to claim 1, characterized in that: The clamp assembly (6) consists of two parts: an upper clamping body (601) and a lower clamping body (602). The upper clamping body (601) is fixedly mounted on the bottom end of the hydraulic telescopic rod (5), and the lower clamping body (602) is fixedly mounted on the top end of the support rod (4).

3. A steel strand tensile test fixture according to claim 2, characterized in that: The hard clamping seat is a wear-resistant clamping seat (603) arranged and distributed on the side walls adjacent to the upper clamping body (601) and the lower clamping body (602); the soft clamping seat is an anti-slip rubber seat (604) arranged and distributed on the side walls adjacent to the upper clamping body (601) and the lower clamping body (602); the clamping end surface of the anti-slip rubber seat (604) is higher than the wear-resistant clamping seat (603); and both the wear-resistant clamping seat (603) and the anti-slip rubber seat (604) can be disassembled.

4. A steel strand tensile test fixture according to claim 3, characterized in that: The connection between the wear-resistant clamping seat (603) and the upper clamping body (601) and the lower clamping body (602) is formed with an interlocking protrusion (605), and the upper clamping body (601) and the lower clamping body (602) are both provided with an embedding groove (606) corresponding to the interlocking protrusion (605). The wear-resistant clamping seat (603) establishes a detachable connection relationship with the upper clamping body (601) and the lower clamping body (602) through the interlocking protrusion (605).

5. A steel strand tensile test fixture according to claim 4, characterized in that: A plug-in protrusion (607) is formed on the side wall of the anti-slip rubber seat (604) adjacent to the wear-resistant clamping seat (603), and a plug-in groove (608) is provided at the connecting end of the wear-resistant clamping seat (603) and the plug-in protrusion (607). The anti-slip rubber seat (604) establishes a detachable connection relationship with the wear-resistant clamping seat through the plug-in protrusion (607).

6. A steel strand tensile test fixture according to claim 5, characterized in that: The wear-resistant clamping seat (603) has three structures: a wear-resistant clamping seat (603) having longitudinal anti-slip protrusions on the clamping surface, a wear-resistant clamping seat (603) having transverse anti-slip protrusions on the clamping surface, and a wear-resistant clamping seat (603) having a frosted anti-slip layer on the clamping surface. The wear-resistant clamping seat (603) having longitudinal anti-slip protrusions on the clamping surface, the wear-resistant clamping seat (603) having transverse anti-slip protrusions on the clamping surface, and the wear-resistant clamping seat (603) having a frosted anti-slip layer on the clamping surface are arranged in sequence.

7. A steel strand tensile test fixture according to claim 6, characterized in that: The clamping surface of the anti-slip rubber seat (604) is provided with a rubber anti-slip protrusion.

8. The steel strand tensile test fixture according to claim 7, characterized in that: Both ends of the anti-slip rubber seat (604) are formed with extended protrusions (609).

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