Rock tensile strength testing device

Abstract

The utility model relates to the technical field of rock tensile strength testing, in particular to a rock tensile strength testing device which comprises a workbench, an installation box is arranged on the top face of the workbench, two supporting shafts are rotationally arranged in the installation box, and the top and the front side of the installation box are open. An adjusting assembly used for controlling the two supporting shafts to get close to each other or get away from each other is arranged on the rear side of the mounting box, a support is fixedly mounted above the workbench, and an upper pressing plate is arranged in the support. By arranging the mounting box, the supporting shaft, the adjusting assembly, the inclined plane and the driving assembly, the supporting shaft can support a test piece by utilizing the adjusting assembly, the tensile test part of the test piece is convenient to adjust, the supporting shaft is adaptive to test pieces with various diameters, and the mounting box is controlled to move by utilizing the driving assembly, so that the test piece is convenient to place or take out; the fragments in the mounting box are poured out by utilizing the inclination of the mounting box; the problems that test pieces are difficult to place and cannot be suitable for test pieces with various diameters are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rock tensile strength test technical field, especially a rock tensile strength testing device. BACKGROUND

[0002] In the field of geotechnical engineering such as mining engineering, underground tunnel engineering, water conservancy engineering, transportation engineering, oil exploitation and nuclear waste deep underground engineering, a large number of rock mechanics experiments need to be carried out, and the tensile strength of rock is an important rock mechanics experimental measurement parameter. Because the direct tensile test is difficult to complete in operation, the Brazilian split test is usually used to obtain the tensile strength of rock indirectly.

[0003] The basic principle of the Brazilian split test is to use a solid cylindrical test piece to bear radial compression linear load to failure, and the tensile strength of rock is indirectly obtained.

[0004] A Brazilian split test clamp is disclosed in Chinese patent publication No. CN110646279B. The Brazilian split test clamp uses a test piece fixing device to solve the problems of test piece deviation caused by single-handed placement of the test piece and experimental data deviation.

[0005] However, compared with the existing technology in the related field, because there are various test pieces with different diameters in daily use, and the existing equipment needs to produce a fixing device that matches the diameter of the test piece during use, the application range of the device is small, the use cost is high, and the diameters of the test pieces are different, and the weights of the test pieces are also different. Some heavy test pieces are not convenient for workers to place between the two pressure plates, and the test pieces will produce debris after the tensile strength test, and it is not convenient to clean up the debris. INVENTION CONTENTS

[0006] The utility model aims at overcoming the shortcomings of the prior art, solving the problems mentioned in the background art, and providing a rock tensile strength testing device.

[0007] The utility model discloses a workbench, the top surface of workbench is equipped with the installation box, the inside rotation of installation box is equipped with two support shafts, the top and front side of installation box are all open, the rear side of installation box is equipped with the adjusting assembly for controlling two support shafts are close to each other or each other away, the upper fixed mounting of workbench is equipped with the support, the inside of support is equipped with the upper pressure plate, the bottom of upper pressure plate and the inside of installation box are opposite respectively and are equipped with the pressure assembly, the support is equipped with the hydraulic cylinder for controlling the movement of upper pressure plate.

[0008] The workbench is provided with a driving assembly for controlling the sliding of the mounting box, the mounting box is hinged to the driving assembly, the front side of the top surface of the workbench is formed with an inclined surface, when the driving assembly controls the mounting box to move to the inclined surface, the opening on the front side of the mounting box is automatically inclined downward, when the driving assembly controls the mounting box to move below the upper pressing plate, the mounting box is automatically changed to a horizontal state.

[0009] Preferably, the adjusting assembly comprises two supporting members symmetrically fixed to the rear side of the mounting box, a first screw rod is rotatably arranged between the two supporting members, and a moving block is threadedly connected to the outer surface of the first screw rod at positions corresponding to the two supporting shafts, and the supporting shafts are rotatably connected to the moving block.

[0010] Preferably, the mounting box is provided with a moving groove at positions corresponding to the moving blocks, the first screw rod is a left-right screw rod, and the two moving blocks are each provided with a threaded hole corresponding to the position of the first screw rod.

[0011] Preferably, the outer surface of the supporting shaft is sleeved with a sponge layer, the moving block is provided with a rotating hole at a position corresponding to one end of the supporting shaft, and the end of the supporting shaft is connected to the rotating hole through a bearing.

[0012] Preferably, the pressing assembly comprises a triangular prism, the triangular prism is provided with an embedded groove, the embedded groove is inlaid with a pad, the bottom of the upper pressing plate and the inside of the mounting box are each provided with a sliding groove at positions corresponding to the triangular prism, and the triangular prism is fixedly provided with a sliding block corresponding to the sliding groove.

[0013] Preferably, the driving assembly comprises a movable groove arranged on the top of the workbench, a second screw rod is rotatably arranged in the movable groove, the outer surface of the second screw rod is threadedly connected with a movable block which is in sliding cooperation with the movable groove, the top of the movable block is provided with a hinge groove, a hinge member is fixedly arranged at a position close to the rear side of the bottom of the mounting box, the hinge member is hinged to the hinge groove through a rotating shaft, a motor is fixedly arranged at the rear side of the workbench, and the output end of the motor is connected with the second screw rod through the workbench.

[0014] Beneficial effects:

[0015] The rock tensile strength testing device, through the installation box, the supporting shaft, the adjusting assembly, the inclined surface and the driving assembly, on the one hand, the adjusting assembly can adjust the spacing of the two supporting shafts, so that the supporting shafts can hold up the cylindrical rock test piece, the staff can adjust the tensile test part of the cylindrical rock test piece, and the supporting shafts can adapt to cylindrical rock test pieces of various diameters, so that the centers of the cylindrical rock test pieces of various diameters can be connected in a straight line with the two loading points of the two pressure applying assemblies, effectively ensuring the accuracy of the test results of the cylindrical rock test piece, and on the other hand, the driving assembly can control the movement of the installation box, so that the staff can place or take out the cylindrical rock test piece, and the installation box can be tilted to facilitate the pouring of the fragments in the installation box, effectively improving the convenience of fragment cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 It is a state diagram of the installation box of the present application moving close to the inclined surface of the workbench;

[0018] Figure 2 It is a state diagram of the installation box of the present application moving below the upper pressing plate;

[0019] Figure 3 It is a first shaft side schematic diagram of the pressure applying assembly of the present application working;

[0020] Figure 4 It is a second shaft side schematic diagram of the pressure applying assembly of the present application working;

[0021] Figure 5 It is a first shaft side schematic diagram of the installation box of the present application tilting; Figure 4

[0022] Figure 6 It is a second shaft side schematic diagram of the installation box of the present application tilting;

[0023] Figure 7 It is a second shaft side schematic diagram of the installation box of the present application tilting;

[0024] Figure 8 It is a first shaft side schematic diagram of the installation box of the present application tilting; Figure 7

[0025] Figure 9 ​​The utility model discloses a structure schematic drawing of adjusting assembly.

[0026] In the drawing: 1, workbench;101, slope;2, installation box;201, moving groove;3, support shaft;4, adjusting assembly;401, support piece;402, first screw rod;403, moving block;5, support;6, upper pressing plate;7, pressing assembly;701, triangular prism;702, fitting groove;703, cushion block;704, sliding groove;705, sliding block;8, hydraulic cylinder;9, drive assembly;901, movable groove;902, second screw rod;903, movable block;904, hinged groove;905, hinged piece;10, motor. DETAILED DESCRIPTION

[0027] In the description of the utility model, it is to explain, unless there is the explicit stipulation and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood through specific circumstances.

[0028] The additional aspects and advantages of the utility model will be further given in the following description of the drawings, and part will become obvious from the following description, or understand through the practice of the utility model.

[0029] As Figures 1 to 9 The utility model discloses a rock tensile strength testing device, including workbench 1, the top of workbench 1 is equipped with installation box 2, the inside rotation of installation box 2 is equipped with two support shafts 3, the top and the front side of installation box 2 are open, the rear side of installation box 2 is equipped with adjusting assembly 4 for controlling two support shafts 3 to be close to each other or each other away, the top of workbench 1 is fixedly installed with support 5, the inside of support 5 is equipped with upper pressing plate 6, the bottom of upper pressing plate 6 and the inside of installation box 2 are opposite each other and are equipped with pressing assembly 7, and support 5 is equipped with hydraulic cylinder 8 for controlling the movement of upper pressing plate 6;Workbench 1 is equipped with drive assembly 9 for controlling installation box 2 to slide, and installation box 2 is hinged with drive assembly 9, and the front side of the top of workbench 1 is formed with slope 101, when drive assembly 9 controls installation box 2 to move to slope 101, the opening of the front side of installation box 2 is automatically inclined downward, when drive assembly 9 controls installation box 2 to move below upper pressing plate 6, installation box 2 automatically becomes the horizontal state.

[0030] As a preferred technical scheme of the utility model, as Figure 9As shown, the adjusting assembly 4 comprises two supports 401 fixedly installed on the rear side of the mounting box 2, a first screw rod 402 is rotatably arranged between the two supports 401, rotation holes are formed in positions of the two supports 401 corresponding to the first screw rod 402, the first screw rod 402 is connected with the rotation holes through bearings, so that the friction of the first screw rod 402 during rotation can be reduced, and the stability of the first screw rod 402 during rotation is improved, and moving blocks 403 are threadedly connected to the outer surface of the first screw rod 402 corresponding to the positions of the two support shafts 3, the support shafts 3 are rotatably connected with the moving blocks 403, and the mounting box 2 is provided with moving grooves 201 corresponding to the positions of the moving blocks 403, the first screw rod 402 is a left and right screw rod, the two moving blocks 403 are provided with thread holes matched with the positions of the first screw rod 402, the outer surface of the support shaft 3 is sleeved with a sponge layer, and the moving block 403 is provided with a rotation hole corresponding to one end of the support shaft 3, and the end of the support shaft 3 is connected with the rotation hole through a bearing. Figure 5 and Figure 9 As shown, the bearings can reduce the friction of the support shaft 3 during rotation and improve the stability of the support shaft 3 during rotation, so that the cylindrical rock test piece can be held up by the support shaft 3, at this time, the support shaft 3 can be rotated to facilitate the rotation of the cylindrical rock test piece by the staff, so as to adjust the tensile test position of the cylindrical rock test piece, and the distance between the two support shafts 3 can be adjusted according to the diameter of the cylindrical rock test piece, so that cylindrical rock test pieces of various diameters can be attached to the pressure applying assembly 7 inside the mounting box 2.

[0031] As a preferred technical scheme of the utility model, as shown in Figures 3 to 5 The pressure applying assembly 7 comprises three prisms 701, the three prisms 701 are provided with fitting grooves 702, the fitting grooves 702 are inlaid with pad blocks 703, the bottom of the upper pressing plate 6 is provided with sliding grooves 704 corresponding to the positions of the three prisms 701 inside the mounting box 2, and the three prisms 701 are fixedly provided with sliding blocks 705 matched with the positions of the sliding grooves 704, in use, the pad blocks 703 can be taken out from the fitting grooves 702, so that the pad blocks 703 can be replaced according to the material of the test piece, and the sliding blocks 705 on the three prisms 701 are embedded in the sliding grooves 704, so that the three prisms 701 will not slide when the mounting box 2 is inclined.

[0032] As a preferred technical scheme of the utility model, as shown in Figure 8As shown, the driving assembly 9 comprises a movable slot 901 opened on the top of the workbench 1, a second screw rod 902 is rotatably arranged inside the movable slot 901, the outer surface of the second screw rod 902 is threadedly connected with a movable block 903 which is in sliding cooperation with the movable slot 901, a hinged slot 904 is opened on the top of the movable block 903, a hinge part 905 is fixedly arranged on the bottom of the mounting box 2 near the rear side, the hinge part 905 is hinged with the hinged slot 904 through a rotating shaft, as shown in Figures 6 to 8 As shown, the movable block 903 is left with a gap from the bottom of the mounting box 2, so that when the rear side of the mounting box 2 reaches the slope 101 of the workbench 1, the mounting box 2 can be automatically tilted by using the hinged principle, as shown in Figure 1 and Figure 7 As shown, a motor 10 is fixedly arranged on the rear side of the workbench 1, the output end of the motor 10 penetrates through the workbench 1 and is connected with the second screw rod 902, in use, the motor 10 is controlled to rotate the second screw rod 902, then the movable block 903 is threadedly connected with the second screw rod 902, so that the movable block 903 drives the mounting box 2 to move to the side close to the slope 101 through the hinge part 905, at this time, the cylindrical rock sample can be placed on the two supporting shafts 3 (as shown in Figure 5 As shown, the outer surface of the cylindrical rock sample is attached to the pressing assembly 7 inside the mounting box 2), as shown in Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, when the cylindrical rock sample is placed on the two supporting shafts 3, the motor 10 is controlled to reversely rotate the second screw rod 902, so that the movable block 903 drives the mounting box 2 to move below the upper pressing plate 6 through the hinge part 905, when the tensile strength test of the cylindrical rock sample is completed, the motor 10 is controlled to rotate the second screw rod 902, then the movable block 903 is threadedly connected with the second screw rod 902, so that the movable block 903 drives the mounting box 2 to move to the side close to the slope 101 through the hinge part 905, at this time, the broken cylindrical rock sample can be taken down, then the mounting box 2 is continuously controlled to move to the side of the slope 101, when the mounting box 2 moves to the slope 101, the opening on the front side of the mounting box 2 will be automatically inclined downward, at this time, the broken pieces inside the mounting box 2 will be automatically poured out.

[0033] The hydraulic cylinder 8 and the motor 10 described in the present application are all known technologies, therefore the specific structure and working principle thereof are not described in detail.

[0034] The working process is as follows:

[0035] S1, as shown in Figure 1 , Figure 5 , Figure 7 and Figure 8As shown, in use, the second screw rod 902 is controlled to rotate by the motor 10, and then the movable block 903 is connected with the second screw rod 902 through screwing, so that the movable block 903 drives the installation box 2 to move to the side close to the inclined surface 101 through the hinge 905, at this time, the cylindrical rock sample can be placed on the two support shafts 3 (the outer surface of the cylindrical rock sample is attached to the pressure applying assembly 7 inside the installation box 2);

[0036] S2, as shown in Figure 2 and Figure 8 When the cylindrical rock sample is placed on the two support shafts 3, the second screw rod 902 is controlled to rotate reversely by the motor 10, so that the movable block 903 drives the installation box 2 to move to the lower side of the upper pressing plate 6 through the hinge 905;

[0037] S3, as shown in Figure 2 and Figure 9 When the installation box 2 moves to the lower side of the upper pressing plate 6, the first screw rod 402 is rotated to make the two movable blocks 403 drive the two support shafts 3 to approach each other, so that the cylindrical rock sample is lifted by the support shafts 3, at this time, the rotatable support shafts 3 facilitate the rotation of the cylindrical rock sample by the staff, so as to adjust the tensile test position of the cylindrical rock sample;

[0038] S4, as shown in Figure 3 , Figure 4 , Figure 5 and Figure 9 When the position of the cylindrical rock sample is adjusted, the first screw rod 402 is reversely rotated to make the two movable blocks 403 drive the two support shafts 3 to move away from each other, so that the cylindrical rock sample is attached to the pressure applying assembly 7 inside the installation box 2 again, so that the center of the sample and the two loading points of the pressure applying assembly 7 are connected in a straight line, at this time, the hydraulic cylinder 8 is started to move the upper pressing plate 6 downward, so that the pressure applying assembly 7 on the upper pressing plate 6 applies pressure to the cylindrical rock sample, and then the tensile strength of the cylindrical rock sample is obtained by indirectly stretching the sample through the Brazilian splitting test (when the cylindrical rock sample is pressed by the pressure applying assembly 7, the sponge layer on the outer surface of the support shaft 3 will be deformed, so as to avoid the influence of the lifting of the support shaft 3 on the measurement result);

[0039] S5, when the cylindrical rock sample is broken, the measurement value can be obtained, and the fragments of the cylindrical rock sample fall inside the installation box 2;

[0040] S6, as shown in Figures 6 to 8As shown, after the tensile strength test of the cylindrical rock specimen is completed, the second screw 902 is rotated by the motor 10. Then, the movable block 903 is threadedly connected to the second screw 902, so that the movable block 903 drives the mounting box 2 to move to the side close to the inclined plane 101 through the hinge 905. At this time, the broken cylindrical rock specimen can be removed. Then, the mounting box 2 is controlled to move to the side of the inclined plane 101. When the mounting box 2 moves to the inclined plane 101, the opening on the front side of the mounting box 2 will automatically tilt downward, and the fragments inside the mounting box 2 will be automatically poured out.

[0041] S7, such as Figure 5 and Figure 9 As shown, when the diameter of the cylindrical rock specimen changes, the first screw 402 controls the two moving blocks 403 to move closer or further apart, thereby adjusting the distance between the two support shafts 3 according to the diameter of the cylindrical rock specimen, so that cylindrical rock specimens of various diameters can be attached to the pressure component 7 inside the mounting box 2.

[0042] This rock tensile strength testing device comprises a mounting box, support shafts, adjustment components, an inclined plane, and a drive component. On one hand, the adjustment component allows for adjustment of the distance between the two support shafts, enabling the support shafts to both support the cylindrical rock specimen, facilitating the adjustment of the tensile testing area, and accommodate cylindrical rock specimens of various diameters. This ensures that the center of each specimen aligns with the loading points of the two pressure components, effectively guaranteeing the accuracy of the test results. On the other hand, the drive component controls the movement of the mounting box, facilitating the placement and removal of the cylindrical rock specimens, and the tilting mechanism of the mounting box allows for easy emptying of debris, significantly improving the convenience of debris removal.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A rock tensile strength testing device, characterized in that: The system includes a workbench (1), a mounting box (2) on the top surface of the workbench (1), two support shafts (3) rotatably mounted inside the mounting box (2), the top and front of the mounting box (2) being open, and an adjustment component (4) for controlling the two support shafts (3) to move closer or further apart on the rear side of the mounting box (2). A bracket (5) is fixedly mounted above the workbench (1), an upper pressure plate (6) is provided inside the bracket (5), and pressure application components (7) are provided at the bottom of the upper pressure plate (6) and opposite to the interior of the mounting box (2). A hydraulic cylinder (8) for controlling the movement of the upper pressure plate (6) is provided on the bracket (5). The workbench (1) is provided with a drive assembly (9) for controlling the sliding of the mounting box (2). The mounting box (2) is hinged to the drive assembly (9). The front side of the top surface of the workbench (1) is formed with an inclined surface (101). When the drive assembly (9) controls the mounting box (2) to move to the inclined surface (101), the opening on the front side of the mounting box (2) automatically tilts downward. When the drive assembly (9) controls the mounting box (2) to move downward to the upper pressure plate (6), the mounting box (2) automatically becomes horizontal.

2. The rock tensile strength testing device according to claim 1, characterized in that: The adjustment component (4) includes two support members (401) symmetrically fixedly installed on the rear side of the mounting box (2). A first screw (402) is rotatably provided between the two support members (401). The outer surface of the first screw (402) is threaded with a moving block (403) corresponding to the position of the two support shafts (3). The support shafts (3) are rotatably connected to the moving blocks (403).

3. The rock tensile strength testing device according to claim 2, characterized in that: The mounting box (2) has a moving groove (201) corresponding to the position of the moving block (403). The first screw (402) is a left- or right-hand threaded rod. Both moving blocks (403) have threaded holes that are compatible with the first screw (402) at their respective positions.

4. The rock tensile strength testing device according to claim 3, characterized in that: The outer surface of the support shaft (3) is fitted with a sponge layer, and the movable block (403) has a rotating hole at one end of the support shaft (3). The end of the support shaft (3) is connected to the rotating hole through a bearing.

5. The rock tensile strength testing device according to claim 1, characterized in that: The pressure application component (7) includes a triangular prism (701), each of which has a fitting groove (702). Each fitting groove (702) has a pad (703) embedded inside. The bottom of the upper pressure plate (6) and the interior of the mounting box (2) are provided with sliding grooves (704) corresponding to the positions of the triangular prisms (701). Each of the triangular prisms (701) is fixedly provided with a slider (705) that matches the sliding groove (704).

6. The rock tensile strength testing device according to claim 1, characterized in that: The drive assembly (9) includes a movable slot (901) opened on the top of the workbench (1). A second screw (902) is rotatably provided inside the movable slot (901). A movable block (903) that slides with the movable slot (901) is threadedly connected to the outer surface of the second screw (902). A hinge slot (904) is opened on the top of the movable block (903). A hinge (905) is fixedly provided at the bottom of the mounting box (2) near the rear side. The hinge (905) is hinged to the hinge slot (904) through a rotating shaft. A motor (10) is fixedly installed on the rear side of the workbench (1). The output end of the motor (10) passes through the workbench (1) and is connected to the second screw (902).

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