CN215640549U

CN215640549U - Rock splitting method tensile test anchor clamps

Info

Publication number: CN215640549U
Application number: CN202121912028.4U
Authority: CN
Inventors: 张欣; 曹月明; 王铁墨; 王永丰; 刘敬上; 高月梅; 孙丽娜; 甘长娟; 何雨韩
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-25
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses a tensile test fixture for a rock splitting method, which comprises a filler strip, an arched base and a baffle provided with a sliding groove, wherein the baffle is respectively arranged on two sides of the arc-shaped section of the base; in the utility model, only the upper and lower backing strips are acted by force during the test, no influence of any lateral force exists, and the upper backing strip cannot be contacted with the sliding groove in the height adjusting process, so that the problem that the test result is influenced due to the obstruction of friction force is avoided; in addition, the base is arched, so that the sample can be prevented from deviating during installation, and the sliding groove of the baffle and the arched central line of the bottom are arranged on a vertical plane, so that the force is always along the diameter direction of the sample in the loading process.

Description

Rock splitting method tensile test anchor clamps

Technical Field

The utility model relates to the technical field of rock tensile splitting tests, in particular to a rock splitting method tensile test clamp.

Background

Tensile strength is one of the main indexes of rock mechanical properties, and is the weakest strength index of rock, and rock failure is often related to tensile stress found from a large number of engineering practices. The method for measuring the tensile strength of the rock comprises a material mechanics method, a circular sheet method and a splitting method. In the test, the tensile strength of the rock is mostly measured by adopting a splitting method indirect tensile test, namely, a relative linear load is applied along the diameter direction of the cylinder test, so that the tensile stress is caused in the sample along the radial direction to break, and the tensile strength of the rock is obtained. The tensile strength measured by the splitting method is slightly higher than that measured by the direct tensile test, due to friction caused by the closure of micro-fractures in the rock under pressure.

At present, when the existing rock splitting tensile test device is used for testing, because the upper bearing plate and the lower bearing plate need to be connected, friction force is generated between the connecting piece and the upper bearing plate and the lower bearing plate, and then influence interference is generated on applied force, so that the condition of inaccurate test is caused. In a rock splitting tensile test device disclosed in publication No. CN 208366723U, the upper holding member and the lower holding member are connected by a metal connecting rod, and during the test, friction force is generated between the upper holding member and the metal connecting rod and between the lower holding member and the metal connecting rod, so that the applied pressure changes, thereby affecting the test accuracy. In order to solve the problems, the utility model provides a rock splitting tensile test clamp, which solves the problem that the conventional rock splitting tensile test clamp is low in test precision.

Disclosure of Invention

The utility model aims to provide a tensile test clamp for a rock splitting method, which aims to improve the test precision.

In order to achieve the purpose, the utility model provides the following scheme:

the utility model provides a rock splitting method tensile test anchor clamps, includes filler strip, arch base and sets up the baffle of spout, the arc cross-section both sides of base are provided with respectively the baffle, the filler strip includes filler strip and lower filler strip, the filler strip sets up down on the central line of base arch face, the both ends of going up the filler strip are installed respectively on the spout, it is in to go up the filler strip projection on the base with the filler strip is in on the same straight line down.

Preferably, a groove is formed in the center line of the arch surface of the base, the lower filler strip is arranged in the groove, the width of the groove is the same as the diameter of the lower filler strip, and the depth of the groove is smaller than the diameter of the lower filler strip.

Preferably, the width of the sliding groove is larger than the diameter of the upper filler strip.

Preferably, the base material is 45 # steel, the baffle is the ya keli board.

Preferably, the diameter of the circle corresponding to the arched surface of the base is not less than 60 mm.

Preferably, the diameter of the backing strip is 2mm to 4 mm.

Preferably, the material of the filler strip is steel wire.

Preferably, a handle for lifting the base is mounted to an edge region of the base.

Compared with the prior art, the utility model has the following technical effects:

1. in the utility model, only force is applied to the upper and lower backing strips during testing without any influence of lateral force, and the upper backing strip cannot contact with the sliding groove in the height adjusting process, so that the testing precision is improved, and the problem that the testing result is influenced due to the fact that the upper backing strip is blocked by friction force is solved; in addition, the base is arched, so that the sample can be prevented from deviating during installation, and the sliding groove of the baffle and the arched central line of the bottom are arranged on a vertical plane, so that the force is always along the diameter direction of the sample in the loading process.

2. According to the utility model, the center line of the arch surface of the base is provided with the groove, the lower gasket is arranged in the groove, the width of the groove is the same as the diameter of the lower gasket, and the depth of the groove is smaller than the diameter of the lower gasket, so that the lower gasket is ensured to be fixed on the center line of the arch surface and to be contacted with a sample, and the test is accurately and efficiently carried out.

3. The width of the sliding groove is larger than the diameter of the upper padding strip, so that the upper padding strip cannot generate frictional sliding with the sliding groove in the process of adjusting the vertical height, and the influence of the frictional force on the test precision is avoided as much as possible.

4. The edge area of the base is provided with a handle for lifting the base.

Drawings

In order to more clearly illustrate the present invention or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a tensile test clamp by a rock splitting method;

FIG. 2 is a top view of a rock cleaving tensile test fixture;

FIG. 3 is a front view of a rock cleaving tensile test fixture;

FIG. 4 is a left side view of a rock cleaving tensile test fixture;

FIG. 5 is a sectional view taken along line A-A of the rock cleaving tensile test fixture;

wherein, 1, a baffle; 2. a base; 3. an upper filler strip; 4. a lower filler strip; 5. a rock sample.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1 to 3, a tensile test fixture by a rock splitting method comprises a filler strip, an arched base 2 and a baffle 1 provided with a sliding groove, wherein the baffle 1 is respectively arranged on two sides of an arc-shaped section of the base 2, the filler strip comprises an upper filler strip 3 and a lower filler strip 4, the lower filler strip 4 is arranged on a central line of an arched surface of the base 2, two ends of the upper filler strip 3 are respectively arranged on the sliding groove, and a projection of the upper filler strip 3 on the base 2 and the lower filler strip 4 are in the same straight line; in the utility model, only force is applied to the upper filler strip 3 during testing, no influence of any lateral force exists, and the upper filler strip 3 cannot be contacted with the sliding groove in the height adjusting process, so that the testing precision is improved, and the problem that the testing result is influenced because the upper filler strip 3 is blocked by friction force is solved; in addition, base 2 becomes the arch, can guarantee that the sample installation can not deviate, and the spout and the bottom arch central line of baffle 1 guarantee that the loading in-process power is along sample diameter direction all the time on a perpendicular.

Referring to fig. 1 or 3, a groove is formed in a center line of an arch surface of the base 2, the lower filler strip 4 is arranged in the groove, the width of the groove is the same as the diameter of the lower filler strip 4, and the depth of the groove is smaller than the diameter of the lower filler strip 4; the lower backing strip 4 is guaranteed to be fixed on the center line of the arch surface, and the lower backing strip 4 is made to contact with a sample, so that the test is accurate and efficient.

The width of spout is greater than the diameter of last filler strip 3 for go up filler strip 3 in the middle of the process of height control from top to bottom can not with the spout takes place the frictional sliding, avoids the influence that the production of frictional force caused the test precision as far as possible.

Further, base 2 material is 45 # steel, and the material of high strength makes base 2 can not take place to warp or collapse under the circumstances of applying the load, and baffle 1 is the ya keli board, and it is little to have a dead weight, long service life's characteristics, the removal of the rock splitting method tensile test anchor clamps of being convenient for, the life of extension rock splitting method tensile test anchor clamps simultaneously.

Furthermore, the diameter of the circle corresponding to the arched surface of the base 2 is not less than 60mm, so that most of the rock samples 5 can be conveniently placed.

Further, the diameter of the backing strip is 2mm to 4 mm.

Further, the steel wire is chooseed for use to the material of filler strip, and the cost is lower, and is convenient for change.

Further, a handle for lifting the base 2 is mounted on the edge area of the base 2.

Example 1, a specific mode of use of the utility model is as follows: firstly, mounting a lower backing strip 4 in a groove, and placing a rock sample 5 on the arch surface of a base 2 and contacting the lower backing strip 4; then, moving the upper filler strip 3 in the sliding groove and contacting with the rock sample 5; and finally, pressurizing the upper filler strip 3 by using a pressurizer, and recording related data to finish the tensile test of the rock.

Example 2, further, a pad can be placed on the upper filler strip 3, and the test procedure is as follows: firstly, mounting a lower backing strip 4 in a groove, and placing a rock sample 5 on the arch surface of a base 2 and contacting the lower backing strip 4; then, moving the upper filler strip 3 in the sliding groove and contacting with the rock sample 5, and placing a base plate on the upper filler strip 3; and finally, pressurizing the base plate by using a pressurizer, and recording related data to finish the tensile test of the rock.

The adaptation according to the actual needs is within the scope of the utility model.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a rock splitting method tensile test anchor clamps, its characterized in that, includes filler strip, arch base and sets up the baffle of spout, the arc cross-section both sides of base are provided with respectively the baffle, the filler strip includes filler strip and filler strip down, the filler strip sets up down on the central line of base arch face, the both ends of going up the filler strip are slidable mounting respectively on the spout, it is in to go up the filler strip projection on the base with the filler strip is in on the same straight line down.

2. The rock splitting tensile test fixture of claim 1, wherein a groove is formed on a center line of an arch surface of the base, the lower backing strip is arranged in the groove, the width of the groove is the same as the diameter of the lower backing strip, and the depth of the groove is smaller than the diameter of the lower backing strip.

3. The rock cleaving tensile test fixture of claim 1, wherein the width of the runner is greater than the diameter of the upper backing strip.

4. The rock cleaving tensile test fixture of claim 1, wherein the base is made of 45 steel, and the baffle is an acrylic plate.

5. The rock cleaving tensile test fixture of claim 1, wherein the arcuate surface of the base has a corresponding circular diameter of not less than 60 mm.

6. The rock cleaving tensile test fixture of claim 1, wherein the spacer has a diameter of 2mm to 4 mm.

7. The rock cleaving tensile test fixture of claim 6, wherein the filler strip is made of steel wire.

8. The rock cleaving tensile test fixture of claim 1, wherein a handle is mounted to an edge region of the base for lifting the base.