Expansion type clamping device for tensile test of steel wire rope

Abstract

The utility model provides an expansion type clamping device used for a steel wire rope tensile test, the expansion type clamping device comprises a clamping plate, a double-arm connecting piece, a connecting rod, an anti-release buckle, a nut and a taper pipe assembly, during detection, the clamping plate and the double-arm connecting piece are connected together through the connecting rod, the anti-release buckle penetrates through a radial through hole in the connecting rod, and the taper pipe assembly is inserted into the connecting rod; the connecting rod is prevented from falling off; then a nut is screwed to the bottom of the screw of the double-arm connecting piece, a steel wire rope to be subjected to a tensile test sequentially penetrates through the inner conical piece and the outer conical pipe, the outer conical pipe is screwed to the bottom of the screw of the double-arm connecting piece, the clamping device at one end of the steel wire rope is installed, and the other end of the steel wire rope is installed on another clamping device with the same specification; during a tensile test, the two clamping devices are respectively clamped on an upper jaw and a lower jaw of a tensile testing machine, and then the equipment is started to complete the test. The device can solve the problem that the steel wire rope cannot be subjected to a tensile test.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical property testing, and particularly relates to an expansion type clamping device for wire rope tensile testing. Background Art

[0002] A wire rope is composed of steel wires, a rope core and grease. First, multiple layers of steel wires are twisted into strands, and then, with the rope core as the center, a certain number of strands are twisted into a spiral-shaped rope, which is a relatively loose structure. In physical and chemical inspections, in order to re-inspect the mechanical properties of the wire rope, a tensile test needs to be carried out on it. The jaws configured on the tensile testing machine are generally flat jaws or V-shaped jaws. No matter which type of jaw, during the experiment, the two ends of the wire rope are directly clamped by the jaws. Due to the loose structure of the wire rope, under the action of the clamping force, before the wire rope is broken, the clamped parts at both ends have already become scattered, and the wire rope has become loose into multiple strands of steel wires. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The utility model provides an expansion type clamping device for wire rope tensile testing to solve the technical problem that the wire rope cannot be subjected to tensile testing.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the utility model provides an expansion type clamping device for wire rope tensile testing. The expansion type clamping device includes a clamping plate, a double-arm connecting piece, a connecting rod, an anti-release buckle, a nut and a tapered tube assembly; wherein,

[0007] The clamping plate is processed with through holes for connecting with the double-arm connecting piece;

[0008] The upper part of the double-arm connecting piece is a U-shaped structural member. Through holes corresponding to the through holes on the clamping plate are processed on the two arms of the U-shaped structural member. The lower part of the double-arm connecting piece is a stud for connecting the nut and the tapered tube assembly;

[0009] The connecting rod passes through the through holes on the clamping plate and the double-arm connecting piece to connect the clamping plate and the double-arm connecting piece together; a radial through hole is processed at the front end of the connecting rod for installing the anti-release buckle;

[0010] The tapered tube assembly consists of an outer tapered tube and an inner tapered piece. The rear end of the outer tapered tube is machined with an internal thread connected to the stud of the double-arm connecting piece, and the front end is a conical tube body. The outer tapered tube plays a role in support and fixation. The inner tapered piece is in the form of a conical spring piece and is placed inside the outer tapered tube. The inner diameter of the outer tapered tube is larger than that of the inner tapered piece. During the test, a wire rope matching the inner diameter of the inner tapered piece is sequentially passed through the inner tapered piece and the outer tapered tube. Under the action of tension, the wire rope drives the inner tapered piece to move forward inside the outer tapered tube, thereby forming a positive pressure on the outer peripheral surface of the inner tapered piece, so that a friction self-locking is formed among the wire rope, the inner tapered piece and the outer tapered tube to fix the wire rope.

[0011] Furthermore, the clamping plate is a rectangular metal plate.

[0012] Furthermore, a limit boss is provided at the rear end of the connecting rod.

[0013] (III) Beneficial effects

[0014] The present utility model provides an expansion type clamping device for wire rope tensile test. The expansion type clamping device includes a clamping plate, a double-arm connecting piece, a connecting rod, an anti-loosening buckle, a nut and a tapered tube assembly. During detection, first use the connecting rod to connect the clamping plate and the double-arm connecting piece together, and pass the anti-loosening buckle through the radial through hole on the connecting rod to prevent the connecting rod from falling off. Then screw the nut to the bottom of the screw rod of the double-arm connecting piece, pass the wire rope to be subjected to tensile test through the inner tapered piece and the outer tapered tube in sequence, and screw the outer tapered tube to the bottom of the screw rod of the double-arm connecting piece, and the installation of the clamping device at one end of the wire rope is completed. In this way, install the other end of the wire rope on another clamping device of the same specification. During the tensile test, clamp the two clamping devices on the upper and lower jaws of the tensile testing machine respectively, and then start the equipment to complete the test. Using the present utility model can solve the problem that the wire rope cannot be subjected to tensile test. Description of the drawings

[0015] Figure 1 is a schematic diagram of the overall structure of the expansion type clamping device of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the clamping plate in the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the double-arm connecting piece in the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the connecting rod in the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the tapered tube assembly in the present utility model. Specific implementation manners

[0020] To make the objectives, content, and advantages of the present utility model clearer, the following further describes in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments.

[0021] This embodiment provides an expansion type clamping device for wire rope tensile tests, and its overall structure is as Figure 1 shown, mainly including a clamping plate 1, a double-arm connecting member 2, a connecting rod 3, an anti-release buckle 4, a nut 5, and a tapered tube assembly 6.

[0022] As Figure 2 shown, the clamping plate 1 is a rectangular metal plate, and through holes for connecting with the double-arm connecting member 2 are processed below.

[0023] The structure of the double-arm connecting member 2 is as Figure 3 shown. The upper part of the double-arm connecting member 2 is a U-shaped structural member, and through holes corresponding to the through holes on the clamping plate 1 are processed on the two arms of the U-shaped structural member. The lower part of the double-arm connecting member 2 is a stud for connecting the nut 5 and the tapered tube assembly 6.

[0024] The structure of the connecting rod 3 is as Figure 4 shown. The connecting rod 3 passes through the through holes on the clamping plate 1 and the double-arm connecting member 2 to connect the clamping plate 1 and the double-arm connecting member 2 together. A limiting boss is provided at the rear end of the connecting rod 3, and a radial through hole is processed at the front end of the connecting rod 3 for installing the anti-release buckle 4.

[0025] The structure of the tapered tube assembly 6 is as Figure 5 shown, and it is composed of an outer tapered tube 6-1 and an inner tapered piece 6-2. An internal thread connected to the stud of the double-arm connecting member 2 is processed at the rear end of the outer tapered tube 6-1, and the front end is a conical tube body. The outer tapered tube 6-1 plays a role in support and fixation. The inner tapered piece 6-2 is in the form of a tapered spring piece and is placed inside the outer tapered tube 6-1. The inner diameter of the outer tapered tube 6-1 is larger than the inner diameter of the inner tapered piece 6-2. During the test, a wire rope matching the inner diameter of the inner tapered piece 6-2 is sequentially passed through the inner tapered piece 6-2 and the outer tapered tube 6-1. Under the action of the tensile force, the wire rope drives the inner tapered piece 6-2 to move forward inside the outer tapered tube 6-1, and then a large positive pressure is formed on the outer peripheral surface of the inner tapered piece 6-2, so that a friction self-locking is formed among the wire rope, the inner tapered piece 6-2, and the outer tapered tube 6-1, thereby achieving the effect of fixing the wire rope.

[0026] When using the expansion type clamping device of the present utility model for wire rope tensile tests, the detection method specifically includes the following steps:

[0027] First, connect the clamping plate 1 and the double-arm connecting piece 2 together with the connecting rod 3, and pass the anti-release buckle 4 through the radial through-hole on the connecting rod 3 to prevent the connecting rod 3 from falling off. Then screw the nut 5 to the bottom of the screw rod of the double-arm connecting piece 2, pass the wire rope to be subjected to the tensile test through the inner conical piece 6-2 and the outer conical tube 6-1 in sequence, and screw the outer conical tube 6-1 to the bottom of the screw rod of the double-arm connecting piece 2, and the clamping device at one end of the wire rope is installed. In this way, install the other end of the wire rope on another clamping device of the same specification. During the tensile test, clamp the two clamping devices on the upper and lower jaws of the tensile testing machine respectively, and then start the equipment to complete the test.

[0028] The above is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. An expansion type clamping device for wire rope tensile test, characterized in that, The expansion type clamping device includes a clamping plate, a double-arm connecting piece, a connecting rod, an anti-release buckle, a nut and a taper pipe assembly; among them, The clamping plate is processed with through holes for connecting with the double-arm connecting piece; The upper part of the double-arm connecting piece is a U-shaped structural member, and through holes corresponding to the through holes on the clamping plate are processed on the two arms of the U-shaped structural member. The lower part of the double-arm connecting piece is a stud for connecting the nut and the taper pipe assembly; The connecting rod passes through the through holes on the clamping plate and the double-arm connecting piece to connect the clamping plate and the double-arm connecting piece together; a radial through hole is processed at the front end of the connecting rod for installing the anti-release buckle; The taper pipe assembly is composed of an outer taper pipe and an inner taper piece. The rear end of the outer taper pipe is processed with an internal thread connected to the stud of the double-arm connecting piece, and the front end is a conical pipe body. The outer taper pipe plays a role of support and fixation; the inner taper piece is in the form of a conical spring piece and is placed inside the outer taper pipe. The inner diameter of the outer taper pipe is larger than the inner diameter of the inner taper piece; during the test, a steel wire rope matching the inner diameter of the inner taper piece is selected to pass through the inner taper piece and the outer taper pipe in sequence. Under the action of tension, the steel wire rope drives the inner taper piece to move forward inside the outer taper pipe, and then a positive pressure is formed on the outer peripheral surface of the inner taper piece, so that a friction self-locking is formed among the steel wire rope, the inner taper piece and the outer taper pipe to fix the steel wire rope.

2. The expandable clamping device according to claim 1, wherein The clamping plate is a rectangular metal plate.

3. The inflatable clamping device according to claim 1, wherein A limit boss is arranged at the rear end of the connecting rod.

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