CN217954089U

CN217954089U - Concrete axial tension test anchor clamps

Info

Publication number: CN217954089U
Application number: CN202221466631.9U
Authority: CN
Inventors: 杨平; 张振宇; 高丽杰; 薄茗月; 吴红; 吴婕
Original assignee: Gezhouba Group Testing and Inspection Co Ltd
Current assignee: Gezhouba Group Testing and Inspection Co Ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-12-02
Anticipated expiration: 2032-06-13

Abstract

A concrete axial tensile test fixture comprises a bracket, wherein adjusting clamping plates are arranged on the left and right of the bracket, and a pull rod is arranged above or below the bracket; the adjusting clamp plate comprises a front baffle plate and a rear baffle plate, and the front baffle plate is connected with the rear baffle plate through a vertical rotating shaft and rotates relative to the rear baffle plate; the rear baffle is connected with the bracket through a horizontal rotating shaft and rotates relative to the bracket; the axes of the vertical rotating shaft and the horizontal rotating shaft are vertical to each other. The utility model provides a pair of concrete axial tensile test anchor clamps can be so that anchor clamps are adjusted in two position to adapt to test piece deformation and dimensional deviation.

Description

Concrete axial tension test anchor clamps

Technical Field

The utility model relates to an anchor clamps, especially a concrete axial tensile test anchor clamps can assist survey concrete axial tensile strength and ultimate tensile value.

Background

According to the requirements of the industry standard DL/T5150 'hydraulic concrete test regulations', the clamping modes of the concrete axial tensile test piece include a pull ring, a pull rod, a pull plate and a wing type. The current splayed clamp adopted for the airfoil test piece can only rotate in the axial direction of the parallel test piece. Due to the limitation of the clamp machining precision and the test piece manufacturing precision, the sizes of the clamp and the test piece cannot be hundred percent accurate, and the test piece is inevitably deviated when clamped on the clamp, so that the test piece is twisted instead of pulled off due to the torsion generated by the test piece when pulled, and the test result is deviated. If the test piece can rotate in the axial direction and the vertical and axial directions at the same time, the test piece can automatically adjust the angle after being pulled so that the stress direction is parallel to the axial direction, and further the torsion is eliminated.

The patent 'a concrete axial tension test clamp' of patent application number "202111384683.1, adopts unipolar drive wedge anchor clamps rotation, can only adjust in an azimuth, does not reach ideal effect.

Disclosure of Invention

The utility model aims to solve the technical problem that a concrete axial tensile test anchor clamps is provided, can be in parallel and vertical direction on free rotation to adapt to test piece deformation and dimensional deviation.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a concrete axial tensile test fixture comprises a bracket, wherein adjusting clamping plates are arranged on the left and right of the bracket, and a pull rod is arranged above or below the bracket;

the adjusting clamp plate comprises a front baffle plate and a rear baffle plate, and the front baffle plate is connected with the rear baffle plate through a vertical rotating shaft and rotates relative to the rear baffle plate; the rear baffle is connected with the bracket through a horizontal rotating shaft and rotates relative to the bracket; the axes of the vertical rotating shaft and the horizontal rotating shaft are vertical to each other.

And a limiting rod is arranged on one side of the front baffle plate from top to bottom and is positioned on the outer side of the bracket.

The support comprises a top plate, frames are fixed on the front and the back of the top plate, and through holes for the horizontal rotating shafts to pass through are formed in the left and the right of the lower end of each frame.

The utility model relates to a concrete axial tensile test anchor clamps has following technological effect: the front baffle plate can rotate freely in two directions by utilizing the two mutually perpendicular rotating shafts, so that the deformation and the size deviation of the test piece can be better adapted, and the test piece interruption rate is improved. By utilizing the device, the tensile test of the concrete axle center can be completed in an auxiliary manner according to the industrial specifications, and the data effectiveness is improved.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a front view of the middle adjusting splint of the present invention.

Fig. 2 is a left side view of the middle adjusting splint of the present invention.

Fig. 3 is a schematic structural view of the middle adjusting clamp plate of the present invention.

Fig. 4 is a front view of the middle support of the present invention.

Fig. 5 is a left side view of the middle support of the present invention.

Fig. 6 is a front view of the present invention.

Fig. 7 is a schematic structural diagram of the present invention.

Fig. 8 is a schematic view of the overall installation of the present invention.

In the figure: the device comprises a vertical rotating shaft 1, a horizontal rotating shaft 2, a front baffle 3, a rear baffle 4, a support 5, a pull rod 6, a limiting rod 7, a sample 8, a top plate 5.1 and a frame 5.2.

Detailed Description

As shown in figure 1, the clamp for the concrete axial tension test comprises a support 5, adjusting clamping plates are arranged on the left and right sides of the support 5, and a pull rod 6 is arranged above or below the support 5.

The adjusting splint comprises a vertical rotating shaft 1, a horizontal rotating shaft 2, a front baffle 3 and a rear baffle 4.

The vertical rotating shaft 1 is an M16 high-strength bolt, and the vertical rotating shaft 1 is used for connecting the front baffle 3 and the rear baffle 4 and enabling the front baffle 3 to rotate around the axis of the vertical rotating shaft 1 relative to the rear baffle 4.

The horizontal rotating shaft 2 is an M16 high-strength bolt, and the horizontal rotating shaft 2 is horizontally arranged and is vertical to the axis of the vertical rotating shaft 1 and is arranged in a staggered mode. The horizontal rotating shaft 2 is fixed on the rear baffle 4, and the horizontal rotating shaft 2 horizontally passes through holes in the front and the rear of the bracket 5 and then is locked by a nut. This makes it possible to turn the adjusting clamp as a whole about the axis of the horizontal axis of rotation 2 with respect to the bracket 5.

The front baffle 3 is made of high-quality high-strength steel and is used for directly contacting with a test piece and transmitting the tension to the test piece. Chamfering is done at the upper and lower both ends of preceding baffle 3, prevents that the baffle right angle from damaging the concrete test block. Two limiting rods 7 are arranged on the side face of the baffle, and the limiting rods 7 can control the rotation range of the adjusting clamp plate, so that the test piece can be conveniently installed.

The rear baffle 4 is made of high-quality high-strength steel and is used for installing the front baffle 3 and enabling the front baffle 3 to rotate relative to the rear baffle 4.

The bracket 5 is made of high-quality high-strength steel and serves as a supporting part. The support 5 comprises a top plate 5.1, frames 5.2 are fixed to the front and the rear of the top plate 5.1, and the frames 5.2 are of isosceles trapezoid structures. The lower end of the frame 5.2 is provided with a through hole for the horizontal rotating shaft 2 to pass through.

The pull rod 6 is made of high-quality high-strength steel, an M16 screw rod is arranged on one side, a hemispherical expansion end is arranged on the other side, and the pull rod 6 is used for connecting the support 5 and the testing machine.

The working principle and the process are as follows:

1) Preparing two sets of test fixtures, and respectively clamping the pull rod 6 of each set of test fixture in the upper jaw and the lower jaw of the testing machine after the pull rod is installed on the bracket 5;

2) A group of adjusting clamp plates are respectively arranged on the same side of the upper bracket 5 and the lower bracket 5, and the cross beam of the tensile machine is adjusted to a proper position;

3) Mounting the test piece 8 in the upper and lower brackets 5, and then mounting the adjusting clamp plate on the other side, wherein the final mounting effect is shown in fig. 8;

4) When the adjusting device needs to be adjusted, the rear baffle 4 can be held to be fixed, the front baffle 3 can be swung forwards or backwards, the front baffle 3 can be rotated relative to the axis of the vertical rotating shaft 1, and the nut is locked after the adjusting device is in place; or, the rear baffle 4 can also be directly rotated around the horizontal rotating shaft 2, so that the front baffle 3 and the rear baffle 4 integrally rotate, and the nut is locked after the front baffle and the rear baffle are in place.

Claims

1. The utility model provides a concrete axial tension test anchor clamps which characterized in that: comprises a bracket (5), adjusting clamping plates are arranged on the left and right of the bracket (5), and a pull rod (6) is arranged above or below the bracket (5);

the adjusting clamp plate comprises a front baffle plate (3) and a rear baffle plate (4), wherein the front baffle plate (3) is connected with the rear baffle plate (4) through a vertical rotating shaft (1) and rotates relative to the rear baffle plate (4); the rear baffle (4) is connected with the bracket (5) through the horizontal rotating shaft (2) and rotates relative to the bracket (5); the axes of the vertical rotating shaft (1) and the horizontal rotating shaft (2) are vertical to each other.

2. The clamp for the concrete axial tension test according to claim 1, wherein: and a limiting rod (7) is arranged on one side of the front baffle (3) from top to bottom, and the limiting rod (7) is positioned on the outer side of the bracket (5).

3. The clamp for the concrete axial tension test according to claim 1, wherein: the support (5) comprises a top plate (5.1), frames (5.2) are fixed to the front and the back of the top plate (5.1), and through holes for the horizontal rotating shafts (2) to pass through are formed in the left and the right of the lower end of each frame (5.2).