CN210487466U

CN210487466U - Cylinder test block splitting test fixture

Info

Publication number: CN210487466U
Application number: CN201921493458.XU
Authority: CN
Inventors: 陈孝强; 王杰
Original assignee: Fujian Jintong Construction Engineering Testing Co Ltd
Current assignee: Fujian Jintong Construction Engineering Testing Co Ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-05-08
Anticipated expiration: 2029-09-09

Abstract

The utility model relates to a cylinder test block splitting test fixture, including top board, holding down plate and test block stop gear, the lower terminal surface of top board and the center department of the up end of holding down plate respectively the rigid coupling have corresponding upper portion limiting rail and holding down strip, the top board has corresponding upper portion limiting rail in two of the both sides rigid coupling respectively of upper portion strip, the holding down plate in the both sides of holding down strip respectively the rigid coupling have two corresponding lower part limiting rail, test block stop gear contain movable device in two upper portion stoppers on two upper portion limiting rail and two lower part stoppers of movable device on two lower part limiting rail, the upper portion stopper does not install in one side of upper portion limiting rail to and the lower part stopper does not install in one side of lower part limiting rail and rotates respectively and installs corresponding spacing guide shaft. The utility model discloses can reach effectively to the cylinder test block form spacingly, can prevent to form rigid support on the cylinder test block simultaneously to effectively promote the accuracy nature of test result.

Description

Cylinder test block splitting test fixture

Technical Field

The utility model relates to a split test is with anchor clamps specifically indicates a cylinder test block split test anchor clamps.

Background

The splitting test is to put two upper and lower filler strips in the diameter direction of a cylindrical test piece, apply relative linear load, and destroy the cylindrical test piece along the diameter direction of the test piece to obtain the tensile strength of the test piece. In the test process, after the cylindrical test block is clamped by the clamp, a press machine is used for uniformly loading until the cylindrical test block is split, and the pressure for applying the load is recorded to be damaged, so that the test purpose is achieved. The traditional clamp for the splitting test is lack of limitation on the test block, and the problem of uneven pressure distribution caused by the fact that the force is difficult to be accurately applied to the diameter direction of the test block is often solved. Therefore, the existing clamp for the splitting test is generally additionally provided with a test block limiting mechanism correspondingly used for limiting the test block. The existing test block limiting mechanism generally adopts a mode that a group of screws are matched with a group of fixing plates, and the two sides of the test block are respectively positioned. Therefore, the limiting effect on the test block is improved, but a set of symmetrical rigid supports are additionally arranged on the two sides of the test block, great supporting force can be generated on the two sides of the test block, the stress in the test block splitting process is greatly influenced, and the accuracy of a test result is further excessively influenced. In order to improve the accuracy of the test result, the screws and the fixing plates on the two sides of the test block can be manually removed only when the test block is stressed to a certain degree, which is very troublesome. And the timing that the fixed plate takes away is difficult to correctly control, in the test process, when carrying out screw rod and fixed plate and taking away, still have great potential safety hazard. The effect of the hard supporting force generated in the earlier stage of the supporting plate on the sample result can not be eliminated.

Consequently, it can be enough effective to form spacingly to the cylinder test block to design a section, can effectively prevent to form rigid support on the cylinder test block simultaneously, effectively prevents that test block stop gear from causing excessive influence to the test result to effectively promote test result accuracy nature, and it is convenient to use, and the test process need not further carry out the cylinder test block splitting test anchor clamps of readjustment to the use of anchor clamps to the utility model discloses a research purpose.

Disclosure of Invention

To the problem that above-mentioned prior art exists, the utility model provides a cylinder test block splitting test fixture, this cylinder test block splitting test fixture can effectively solve the problem that above-mentioned prior art exists.

The technical scheme of the utility model is that:

a clamp for a cylindrical test block splitting test comprises an upper pressure plate, a lower pressure plate and a test block limiting mechanism, wherein the upper pressure plate can move up and down above the lower pressure plate, the centers of the lower end surface of the upper pressure plate and the upper end surface of the lower pressure plate are respectively fixedly connected with a corresponding upper pressing strip and a corresponding lower pressing strip, the upper pressing plate is fixedly connected with two corresponding upper limiting guide rails on two sides of the upper pressing bar respectively, the lower pressing plate is fixedly connected with two corresponding lower limiting guide rails on two sides of the lower pressing bar respectively, the test block limiting mechanism comprises two upper limiting blocks movably arranged on the two upper limiting guide rails and two lower limiting blocks movably arranged on the two lower limiting guide rails, the upper limiting blocks are not arranged on one side of the upper limiting guide rails, the lower limiting blocks are not arranged on one sides of the lower limiting guide rails and are respectively and rotatably provided with corresponding limiting guide shafts; the two ends of the upper pressure plate are fixedly connected with corresponding upper limiting plates downwards respectively, corresponding upper limiting springs are arranged between the outer sides of the upper limiting plates and the corresponding upper limiting plates respectively, corresponding lower limiting plates are fixedly connected with the two ends of the lower pressure plate upwards respectively, and corresponding lower limiting springs are arranged between the outer sides of the lower limiting plates and the corresponding lower limiting plates respectively.

The four corners of the lower pressure plate are respectively and fixedly connected with corresponding conduits upwards, the four corners of the upper pressure plate are respectively and fixedly connected with corresponding guide shafts downwards at the positions corresponding to the conduits, the guide shafts are respectively and movably sleeved in the corresponding conduits, and corresponding positioning springs are respectively fixed between the guide shafts and the bottoms of the corresponding conduits,

the lower end surface of the upper pressing strip and the upper end surface of the lower pressing strip are both arranged in an arc surface shape.

The upper limiting block and the lower limiting block are respectively arranged in an inward inclined mode.

The cross sections of the upper limiting guide rail and the lower limiting guide rail are in inverted trapezoid shapes

And a corresponding stamping base plate is fixedly connected to the center of the top of the upper pressure plate.

The utility model has the advantages that:

in the test process of the utility model, firstly, the cylindrical test block is arranged above the lower pressing plate, and the stable limit support is formed on the cylindrical test block through the cooperation of the lower pressing plate and the limit guide shafts on the two lower limit blocks; the upper pressing plate is stressed to drive the upper pressing bar to move downwards to perform splitting operation on the cylindrical test block, and in the process, the limiting guide shafts on the two upper limiting blocks are positioned on two sides of the top of the cylindrical test block to limit the cylindrical test block; with the continuous descending of the upper pressing strip, the limiting guide shafts on the upper limiting block and the lower limiting block roll on the surface of the cylindrical test block and generate displacement, but are always matched with the upper pressing strip and the lower pressing strip, four limiting points are uniformly distributed on the surface of the cylindrical test block, and the positioning is effectively formed; the upper limiting block and the lower limiting block can displace towards the outer ends of the two sides along with the splitting of the cylinder test block, and hard support is prevented from being formed until the cylinder test block is split. Whole process can enough effectively form spacingly to the cylinder test block, can effectively prevent to form rigid support on the cylinder test block simultaneously. The elasticity of last spacing spring and lower spacing spring compares in splitting pressure, and the influence is minimum, effectively prevents that test block stop gear from causing excessive influence to the test result to effectively promote the accuracy nature of test result. Just the utility model discloses it is very convenient to use in the splitting test process, and the test process need not adjust once more.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a usage state diagram of the present invention.

Detailed Description

To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail with reference to the following examples:

referring to fig. 1-2, a cylindrical test block splitting test fixture comprises an upper press plate 1, a lower press plate 2 and a test block limiting mechanism 3, wherein the upper press plate 1 can move up and down above the lower press plate 2, the centers of the lower end surface of the upper press plate 1 and the upper end surface of the lower press plate 2 are respectively and fixedly connected with a corresponding upper press bar 4 and a corresponding lower press bar 5, two sides of the upper press plate 4 of the upper press plate 1 are respectively and fixedly connected with two corresponding upper limiting guide rails 6, two sides of the lower press bar 5 of the lower press plate 2 are respectively and fixedly connected with two corresponding lower limiting guide rails 7, the test block limiting mechanism 3 comprises two upper limiting blocks 301 movably arranged on the two upper limiting guide rails 6 and two lower limiting blocks 302 movably arranged on the two lower limiting guide rails 7, the upper limiting blocks 301 are not arranged on one side of the upper limiting guide rails 6, the lower limiting blocks 302 are not arranged on one sides of the lower limiting guide rails 7, and are respectively and rotatably provided with corresponding limiting guide shafts 303; the two ends of the upper pressure plate 1 are respectively and fixedly connected with corresponding upper limiting plates 304 downwards, corresponding upper limiting springs 305 are respectively arranged between the outer side of the upper limiting plate 301 and the corresponding upper limiting plates 304, corresponding lower limiting plates 306 are respectively and fixedly connected with the two ends of the lower pressure plate 2 upwards, and corresponding lower limiting springs 307 are respectively arranged between the outer side of the lower limiting plate 302 and the corresponding lower limiting plates 306.

Four corners of the lower press plate 2 are respectively and fixedly connected with corresponding guide pipes 8 upwards, four corners of the upper press plate 2 are respectively and fixedly connected with corresponding guide shafts 9 downwards at positions corresponding to the guide pipes 8, the guide shafts 9 are respectively movably sleeved in the corresponding guide pipes 8, and corresponding positioning springs (not marked) are respectively fixed between the guide shafts 9 and the bottoms of the corresponding guide pipes 8,

the lower end surface of the upper pressing strip 4 and the upper end surface of the lower pressing strip 5 are both arc-surface-shaped.

The upper limiting block 301 and the lower limiting block 302 are respectively arranged to be inclined inward.

The cross sections of the upper limiting guide rail 6 and the lower limiting guide rail 7 are in an inverted trapezoid shape

A corresponding stamping pad plate 10 is fixedly connected to the center of the top of the upper pressure plate 1.

The utility model discloses the operation flow in splitting test process as follows:

1) the cylindrical test block 11 is arranged above the lower pressure plate 2, and the cylindrical test block 11 is stably limited and supported by the cooperation of the lower pressure strip 5 and the limiting guide shafts 303 on the two lower limiting blocks 302;

2) the upper pressing plate 1 is stressed to drive the upper pressing bar 4 to move downwards to perform splitting operation on the cylindrical test block 11, and in the process, the limiting guide shafts 303 on the two upper limiting blocks 301 are positioned on two sides of the top of the cylindrical test block 11 to limit the cylindrical test block 11;

3) with the continuous descending of the upper pressing strip 4, the limiting guide shafts 303 on the upper limiting block 301 and the lower limiting block 302 roll on the surface of the cylindrical test block 11 and generate displacement, but are always matched with the upper pressing strip 4 and the lower pressing strip 5, four limiting points are uniformly distributed on the surface of the cylindrical test block 11, and the positioning is effectively formed;

4) in the splitting process, the upper limiting block 301 and the lower limiting block 302 can displace towards the outer ends of the two sides along with the splitting of the cylindrical test block 11, so that rigid support is prevented from being formed until the cylindrical test block 11 is split.

Whole process can enough effectively form spacingly to cylinder test block 11, can effectively prevent to form rigid support on cylinder test block 11 simultaneously. Compared with the splitting pressure, the elasticity of the upper limiting spring 305 and the lower limiting spring 307 has little influence, and the test block limiting mechanism 3 is effectively prevented from causing excessive influence on the test result, so that the accuracy of the test result is effectively improved. And the utility model discloses it is very convenient to use in the splitting test process, and the test process need not adjust once more.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a cylinder test block splitting test fixture, includes top board, holding down plate and test block stop gear, the top board can realize reciprocating in the holding down plate top, the center department of the lower terminal surface of top board and the up end of holding down plate respectively the rigid coupling have corresponding upper moulding strip and holding down strip, its characterized in that: the test block limiting mechanism comprises two upper limiting blocks movably arranged on the two upper limiting guide rails and two lower limiting blocks movably arranged on the two lower limiting guide rails, the upper limiting blocks are not arranged on one side of the upper limiting guide rails, and the lower limiting blocks are not arranged on one side of the lower limiting guide rails and are respectively and rotatably provided with corresponding limiting guide shafts; the two ends of the upper pressure plate are fixedly connected with corresponding upper limiting plates downwards respectively, corresponding upper limiting springs are arranged between the outer sides of the upper limiting plates and the corresponding upper limiting plates respectively, corresponding lower limiting plates are fixedly connected with the two ends of the lower pressure plate upwards respectively, and corresponding lower limiting springs are arranged between the outer sides of the lower limiting plates and the corresponding lower limiting plates respectively.

2. The clamp for the splitting test of the cylindrical test block according to claim 1, wherein: the four corners of the lower pressing plate are respectively and fixedly connected with corresponding guide pipes upwards, the four corners of the upper pressing plate are respectively and fixedly connected with corresponding guide shafts downwards at positions corresponding to the guide pipes, the guide shafts are respectively movably sleeved in the corresponding guide pipes, and corresponding positioning springs are respectively fixed between the guide shafts and the bottoms of the corresponding guide pipes.

3. The clamp for the splitting test of the cylindrical test block according to claim 1, wherein: the lower end surface of the upper pressing strip and the upper end surface of the lower pressing strip are both arranged in an arc surface shape.

4. The clamp for the splitting test of the cylindrical test block according to claim 1, wherein: the upper limiting block and the lower limiting block are respectively arranged in an inward inclined mode.

5. The clamp for the splitting test of the cylindrical test block according to claim 1, wherein: the cross sections of the upper limiting guide rail and the lower limiting guide rail are both in an inverted trapezoid shape.

6. The clamp for the splitting test of the cylindrical test block according to claim 1, wherein: and a corresponding stamping base plate is fixedly connected to the center of the top of the upper pressure plate.