CN212110903U - A rock shear strength test device - Google Patents

Abstract

The utility model discloses a rock shearing strength testing device, which comprises a longitudinal pressure device and a horizontal pressure device. Two rock fixing boxes symmetrically up and down are arranged below the longitudinal pressure device, and the horizontal pressure device corresponds to the upper The side of the rock fixing box; the rock fixing box is a square box with a relatively inner opening, a limit plate is arranged in the middle of the rock fixing box, and a number of square support columns are longitudinally penetrated through the limit plate, and the square support columns are on the limit plate Arranged in a matrix, the square support column is provided with a longitudinal threaded hole, which is threadedly connected with the threaded column at one end. The utility model has the characteristics of simple structure, low cost, firm rock fixation, and difficulty in experiment failure; in addition, the experiment result is more accurate.

Description

A rock shear strength test device

technical field

The utility model relates to a rock shear resistance strength testing device, in particular to a rock shear resistance strength testing device.

Background technique

The rock shear strength test device is a test instrument for measuring the rock shear strength. It mainly includes two upper and lower rock fixing devices. The lower rock fixing device is fixed on the operating table. After the rock is installed in place, it is fixed on the upper rock. The vertical fixed pressure is applied on the top of the device, and the lateral thrust is applied on the side, and the relationship between the lateral thrust and the slippage of the rock structure surface is observed.

The main problems of the current rock shear strength testing devices are: although the professional equipment has high measurement accuracy, the structure is complex and the cost is high, which is not necessary for some experiments that require non-precision measurement; The experimental equipment is troublesome to operate, and the most important thing is the strange appearance of the rock sample, the fixation of the rock sample is very difficult, and the problems such as falling off, overturning and offset are easy to occur during the experiment, resulting in the failure of the experiment.

Utility model content

The purpose of the utility model is to provide a rock shear strength testing device. The utility model has the characteristics of simple structure, low cost, firm rock fixation, and difficult experiment failure; in addition, the experiment result is more accurate.

The technical scheme of the utility model is as follows: a rock shear strength testing device, comprising a longitudinal pressure device and a horizontal pressure device, two rock fixing boxes symmetrically arranged below the longitudinal pressure device, and the horizontal pressure device corresponds to The side of the upper rock fixing box; the rock fixing box is a square box with a relatively inner opening, a limit plate is arranged in the middle of the rock fixing box, and a number of square support columns are longitudinally penetrated on the limit plate, and the square support columns are in the limit The plates are arranged in a matrix, and the square support column is provided with longitudinal threaded holes, which are threadedly connected with the threaded column at one end.

In the aforementioned rock shear strength testing device, the rock fixing box is arranged on the operating table, the operating table is provided with a fixing frame for fixing the rock fixing box, and the side above the operating table is provided with a gantry; the longitudinal pressure device Including a pressure plate at the top of the rock fixing box above, the top of the pressure plate is connected with an axial pressure rod, the top of the axial pressure rod is connected with an axial telescopic cylinder, the axial telescopic cylinder is fixed on the gantry, and the axial pressure The rod is provided with a first pressure gauge; the horizontal pressure device includes a horizontal telescopic cylinder located on the side of the upper rock fixing box, the horizontal telescopic cylinder is connected with a horizontal pressure rod, and a second pressure rod is arranged on the horizontal pressure rod. Two pressure gauges.

In the aforementioned rock shear strength testing device, the bottom of the pressing plate is provided with a plurality of rotating rollers in parallel along the expansion and contraction direction of the horizontal pressing rod, and the lower end of the rotating rollers are located on a plane lower than the lower end surface of the pressing plate.

In the aforementioned rock shear strength testing device, the rotating roller is arranged in the endless belt.

In the aforementioned rock shear strength testing device, the bottom end of the threaded column is provided with a slot, and the side of the slot is slotted and connected with an iron limit piece through the rotating shaft, and one end of the iron limit piece is located in the slot. In the groove, one end is located on the side of the threaded column, the bottom of the rock fixing box is provided with a plurality of limiting grooves along the circumference of the threaded column, and the bottom of the limiting groove is provided with a magnet.

In the aforementioned rock shear strength testing device, the top end of the square support column is provided with a rubber buffer layer.

The beneficial effects of the utility model

The utility model belongs to a self-made instrument with relatively simple structure and relatively low cost, and is suitable for promotion in teaching experiments. By improving the structure of the rock fixing box, the utility model designs a fixing structure similar to movable type printing, which can be changed according to the shape of the rock surface, so that the rock sample fixing effect is better, and it is not easy to fall off during the experiment. Flip and offset, the experiment is carried out more smoothly, and it is not easy to fail; at the same time, by setting a rubber buffer layer on the top of the square support column in contact with the rock sample, it can avoid the brittle cracking caused by the force on the rock surface during the experiment, and improve the reliability of the experimental results. In addition, by setting the limit device at the bottom end of the threaded column, the problem of the reduction of firmness caused by the rotation of the threaded column during the longitudinal or lateral force process of the square support column is avoided, and the fixing is more firm. In addition, the utility model can greatly reduce the friction force between the pressure plate and the soil sample when the soil sample slips laterally after contacting with the soil sample, thereby further improving the accuracy of the experimental results; , By setting an endless belt outside the rotating roller, the contact surface between the pressure plate and the soil sample is larger, the longitudinal pressure is more uniform, and the experimental effect is better.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the three-dimensional schematic diagram of rock fixing box;

Accompanying drawing 3 is the plane structure schematic diagram of rock fixing box;

Accompanying drawing 4 is the enlarged view of d area in accompanying drawing 3;

Accompanying drawing 5 is the bottom view of accompanying drawing 4 position;

Accompanying drawing 6 is the use state diagram of rock fixing box;

Figure 7 is a schematic diagram of the structure of the pressing plate.

Description of reference numerals: 1- operation table, 2- gantry, 3- rock fixing box, 4- pressing plate, 5- axial pressing rod, 6- axial telescopic cylinder, 7- first pressure gauge, 8- horizontal direction Telescopic cylinder, 9-horizontal pressure rod, 10-second pressure gauge, 11-fixed frame, 12-limiting plate, 13-square support column, 14-threaded column, 15-slotted slot, 16-rotating shaft, 17 -Iron limiting piece, 18-limiting groove, 19-magnet, 20-rotating roller, 21- endless belt, 22-rubber buffer layer.

Detailed ways

The present utility model will be further described below in conjunction with the embodiments, but not as a basis for limiting the present utility model.

Embodiments of the present invention

A rock shear strength test device, as shown in Figures 1-7, includes a longitudinal pressure device and a horizontal pressure device, and two rock fixing boxes 3 symmetrically up and down are arranged below the longitudinal pressure device. The device corresponds to the side of the rock fixing box 3 above; the rock fixing box 3 is a square box with a relatively inner opening, a limit plate 12 is arranged in the middle of the rock fixing box 3, and a number of square supports are longitudinally penetrated through the limit plate 12 Column 13, the square support column 13 is arranged in a matrix on the limit plate 12, the square support column 13 is provided with a longitudinal threaded hole, and is threadedly connected with the threaded column 14 at one end, and one end of the threaded column 14 extends out of the rock fixing box 3 After the bottom of the rock fixing box 3, it is connected with the bottom of the rock fixing box 3 in a rotation; A gantry frame 2 is provided on one side of the frame; the longitudinal pressure device includes a pressure plate 4 arranged at the top of the rock fixing box 3 above, the top of the pressure plate 4 is connected with an axial pressure rod 5, and the top of the axial pressure rod 5 is connected with There is an axial telescopic cylinder 6, the axial telescopic cylinder 6 is fixed on the gantry 2, and a first pressure gauge 7 is arranged on the axial pressure rod 5; the horizontal pressure device includes the side of the rock fixing box 3 located above The horizontal telescopic cylinder 8 is connected with a horizontal pressure rod 9 , and a second pressure gauge 10 is arranged on the horizontal pressure rod 9 .

When working, first remove the rock fixing box 3, turn the threaded column 14 to retract the square support column 13 into the rock fixing box 3, and then put the rock sample into the rock fixing box 3, so that the upper and lower rock fixing boxes 3 are closed. Fix the position, then keep it still, turn each threaded column 14 of the upper and lower rock fixing boxes 3 in turn, so that the top of the square support column 13 is just in contact with the surface at the corresponding position of the rock sample, so that all the square support columns 13 The surface shape formed by the end face is consistent with the surface shape of the rock sample. The rock sample is completely wrapped and fixed. After the rock sample is installed in place, the rock fixing box 3 at the lower end is fixed in the fixing frame 11, so that it cannot be in the horizontal direction. Move, then cover the upper rock fixing box 3, activate the axial telescopic cylinder 6 to put down the pressure plate 4, so that the pressure plate 4 is pressed on the upper rock fixing box 3, after the first pressure gauge 7 observes that the set pressure is reached, The horizontal telescopic cylinder 8 is activated, and the rock fixing box 3 at the upper end is pushed by the horizontal pressing rod 9 to move laterally, so that the lateral thrust can be read by the second pressure gauge 10 .

Preferably, the bottom of the pressing plate 4 is provided with a plurality of rotating rollers 20 in parallel along the telescopic direction of the horizontal pressing rod 9. The lower end of the rotating rollers 20 is located on a plane lower than the lower end surface of the pressing plate 4. The pressing plate 4 is connected to the rock fixing box above. 3 contact, through the contact of the rotating roller 20, during the lateral movement of the rock fixing box 3, the rotating roller 20 rotates, reducing the friction between the rock fixing box 3.

Preferably, the rotating roller 20 is arranged in the endless belt 21, and the endless belt 21 is in contact with the rock fixing box 3 during the experiment to increase the contact area.

Preferably, the bottom end of the threaded post 14 is provided with a slot 15, the side of the slot 15 is slotted and connected to an iron limiting piece 17 through the rotating shaft 16, and one end of the iron limiting piece 17 is located in the slot 17. 15, one end is located on the side of the threaded column 14, the bottom of the rock fixing box 3 is provided with a plurality of limiting grooves 18 along the circumference of the threaded column 14, and the bottom of the limiting groove 18 is provided with a magnet 19. When the threaded post 14 needs to be rotated, the screwdriver is inserted into the slot 15, one end of the iron limiting piece 17 extending into the slot 15 moves downward under the extrusion of the screwdriver, while the other side is lifted up and out of the limit The groove 18, at this time the threaded post 14 can be rotated. After the rotation is in place, the screwdriver is taken out. Under the action of the magnet 19, the end of the iron limit piece 17 close to the limit groove 18 is turned over and inserted into the limit groove 18. , the threaded post 14 remains fixed and cannot be rotated, thereby achieving the purpose of limiting the position of the threaded post 14 .

Preferably, the top of the square support column 13 is provided with a rubber buffer layer 22. When the square support column 13 is in contact with the rock sample, the rubber buffer layer 22 is in contact with the surface of the rock sample, and the friction force is greater, firmer, and flexible. , brittle cracking will not occur on the contact surface between the rock and the square support column 13 during the experiment.

The above descriptions are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or modification of the technical solution and the utility model concept created according to the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. a rock shear strength testing device, is characterized in that: comprise longitudinal pressure device and horizontal pressure device, the bottom of longitudinal pressure device is provided with 2 rock fixing boxes (3) that are symmetrical up and down, horizontal pressure device Corresponding to the side surface of the rock fixing box (3) above; the rock fixing box (3) is a square box with a relatively inner opening, and a limit plate (12) is arranged in the middle of the rock fixing box (3), and the limit plate ( 12) A number of square support columns (13) are longitudinally penetrated through the upper part, and the square support columns (13) are arranged in a matrix on the limit plate (12). The threaded column (14) is threadedly connected, and after one end of the threaded column (14) protrudes from the bottom of the rock fixing box (3), it is rotatably connected with the bottom of the rock fixing box (3). 2. The rock shear strength testing device according to claim 1, wherein the rock fixing box (3) is arranged on the operating table (1), and the operating table (1) is provided with a fixed rock fixing box (3) of the fixing frame (11), a gantry frame (2) is arranged on the side above the operating table (1); the longitudinal pressure device includes a pressure plate (4) arranged at the top of the rock fixing box (3) above. ), the top of the pressure plate (4) is connected with an axial pressure rod (5), the top of the axial pressure rod (5) is connected with an axial telescopic cylinder (6), and the axial telescopic cylinder (6) is fixed on the gantry (2). ), the axial pressure rod (5) is provided with a first pressure gauge (7); the horizontal pressure device includes a horizontal telescopic cylinder (8) located on the side of the upper rock fixing box (3), and the horizontal A horizontal pressing rod (9) is connected to the telescopic cylinder (8), and a second pressure gauge (10) is arranged on the horizontal pressing rod (9). 3. The rock shear strength testing device according to claim 2, characterized in that: the bottom of the pressing plate (4) is juxtaposed with a plurality of rotating rollers (20) along the stretching direction of the horizontal pressing rod (9). , the plane where the lower end of the rotating roller (20) is located is lower than the lower end surface of the pressing plate (4). 4. The rock shear strength testing device according to claim 3, wherein the rotating roller (20) is arranged in the endless belt (21). 5. The rock shearing strength testing device according to claim 1, characterized in that: the bottom end of the threaded column (14) is provided with a slot (15), and the side of the slot (15) is slotted An iron limiting piece (17) is connected via the rotating shaft (16), one end of the iron limiting piece (17) is located in the slot (15), and one end is located on the side of the threaded column (14), and the rock fixing box (3) The bottom of the threaded post (14) is provided with a plurality of limiting grooves (18) along the circumference of the threaded post (14), and the bottom of the limiting grooves (18) is provided with a magnet (19). 6 . The rock shear strength testing device according to claim 1 , wherein a rubber buffer layer ( 22 ) is provided at the top of the square support column ( 13 ). 7 .

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