Rock mechanics experiment device

Abstract

The utility model provides a rock mechanics experiment device which comprises a bottom plate, a supporting frame arranged above the bottom plate, a telescopic frame installed in the supporting frame, a transverse top plate connected above the telescopic frame, a hydraulic cylinder fixed above the top plate through a screw rod, and a telescopic rod of the hydraulic cylinder downwards penetrating through the top plate and connected with a pressing plate. A lower base cylinder is arranged on the upper surface of the bottom plate and located below the telescopic rod, an upper pressing cylinder is arranged above the lower base cylinder, and an open hole for the telescopic rod to penetrate through is formed in the middle of the upper pressing cylinder. When a rock sample needs to be placed, the experiment barrel can be opened only by unscrewing the screw sleeve and lifting the upper pressing barrel, compared with a traditional experiment device, the lifting stroke is shortened, the input cost of the hydraulic cylinder can be saved, the rock sample can be conveniently placed, the work detection efficiency is improved, and when the pressing plate needs to be replaced, the experiment barrel can be opened. And the upper pressing cylinder can be adsorbed below the top plate, so that the damaged pressing plate can be disassembled and replaced conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of rock mechanics experimental technology, and in particular relates to a rock mechanics experimental device. Background Technology

[0002] The forces acting on rocks within geological strata are highly complex, especially after engineering disturbances, which cause a redistribution of force equilibrium. During this equilibrium-disturbance-equilibrium process, if any force exceeds the rock's strength limit, it can lead to failure and trigger a series of geological disasters, severely impacting production activities. Therefore, understanding and mastering the mechanical properties of rocks under complex stress states is crucial.

[0003] The existing rock mechanics experimental apparatus is an integrated structure. When placing rock samples, the experimental cylinder must be fully lifted before the rock sample can be placed in the testing area, which affects the testing efficiency. In addition, rock mechanics experiments require the use of multiple devices such as hydraulic pumps. The equipment used in the existing rock mechanics experimental apparatus is arranged in a messy manner, occupies experimental space, and affects the normal conduct of the experiment. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a rock mechanics experimental device, and the technical solution adopted is as follows:

[0005] A rock mechanics experimental apparatus includes a base plate, a support frame above the base plate, a telescopic frame installed inside the support frame, a transverse top plate connected above the telescopic frame, and a hydraulic cylinder fixed above the top plate by a screw. The telescopic rod of the hydraulic cylinder passes downward through the top plate and is connected to a pressure plate.

[0006] A lower base cylinder is provided on the upper surface of the base plate and below the telescopic rod. An upper pressure cylinder is provided above the lower base cylinder. An opening for the telescopic rod to pass through is provided in the middle of the upper pressure cylinder.

[0007] Furthermore, a hydraulic tank is provided on the upper surface of the base plate and on one side of the support frame. A hydraulic pump is provided above the hydraulic tank. The inlet end of the hydraulic pump is connected to the hydraulic tank below through a pipeline, and the outlet end of the hydraulic pump is connected to the upper pressure cylinder through a connecting pipe. The lower end of the hydraulic tank is connected to the lower base cylinder through a return pipe, forming a closed hydraulic circulation system.

[0008] Furthermore, a valve is provided on one side of the lower base cylinder to control the opening and closing of the return pipe. After the test is completed, the valve is opened to automatically release pressure, allowing the pressurized liquid to flow back into the hydraulic tank.

[0009] Furthermore, the lower base cylinder is equipped with a base for placing the rock column, and a pressure sensor is provided on one side of the base to monitor the pressure changes inside the test cylinder in real time, ensuring the accuracy of the experimental data.

[0010] Furthermore, a magnet is provided on the upper surface of the upper pressure cylinder that can attract the lower end of the screw, so that the upper pressure cylinder can be attracted to the lower part of the screw for inspection and replacement of the pressure plate.

[0011] Furthermore, the lower base cylinder and the upper pressure cylinder are connected by a threaded sleeve, adopting a separate structure, which facilitates the placement and testing of the rock column.

[0012] Furthermore, the lower end of the telescopic frame is inserted into the support frame, and the two are fixed together by bolts. By adjusting the distance between the telescopic frame and the support frame, the height of the top plate can be adjusted, making it suitable for testing rock columns of different lengths and sizes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, the upper pressure cylinder and the lower base cylinder are connected by a screw sleeve. When it is necessary to place a rock sample, simply unscrew the screw sleeve and lift the upper pressure cylinder to open the experimental cylinder. Compared with traditional experimental devices, the lifting stroke is shortened, which can save the investment cost of hydraulic cylinders, facilitate the placement of rock samples, and improve the efficiency of work and testing.

[0015] This invention uses a magnet placed above the upper pressure cylinder to attract the upper pressure cylinder to the bottom of the top plate when the pressure plate needs to be replaced, with the pressure plate exposed on the lower surface of the upper pressure cylinder, thus facilitating the disassembly and replacement of the damaged pressure plate.

[0016] This invention integrates the hydraulic pump and hydraulic tank on the top of the base plate, thereby reducing the space occupied by the experimental equipment, allowing various equipment to be properly placed, and making the experimental environment cleaner. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the separation structure of the upper pressure cylinder and the lower base cylinder of this utility model;

[0019] Figure 3 This is a schematic diagram of the contact structure between the screw and the magnet of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of this utility model;

[0021] Figure 5 This is a utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0022] In the picture:

[0023] 1-Base plate, 11-Support frame, 12-Telescopic frame, 13-Top plate, 2-Lower base cylinder, 21-Threaded sleeve, 22-Valve, 23-Base, 24-Pressure sensor, 3-Upper pressure cylinder, 31-Magnet, 4-Hydraulic cylinder, 41-Telescopic rod, 42-Pressure plate, 5-Screw, 6-Hydraulic tank, 61-Return pipe, 7-Hydraulic pump, 71-Connecting pipe, 8-Rock column. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] As attached Figure 1-5 As shown.

[0026] A rock mechanics experimental apparatus includes a base plate 1, a support frame 11 above the base plate 1, a telescopic frame 12 installed inside the support frame 11, a transverse top plate 13 connected above the telescopic frame 12, and a hydraulic cylinder 4 fixed above the top plate 13 by a screw 5. The telescopic rod 41 of the hydraulic cylinder 4 passes downward through the top plate 13 and performs telescopic operation. A circular pressure plate 42 is installed at the lower end of the telescopic rod 41. The pressure plate 42 is threadedly connected to the telescopic rod 41. After long-term use, the pressure plate 42 can be disassembled and replaced.

[0027] A lower base cylinder 2 is provided on the upper surface of the base plate 1 and below the telescopic rod 41. An upper pressure cylinder 3 is provided above the lower base cylinder 2. An opening for the telescopic rod 41 to pass through is provided in the middle of the upper pressure cylinder 3. The upper pressure cylinder 3 and the telescopic rod 41 are sealed to prevent liquid from seeping out from the connection while keeping the telescopic rod 41 movable.

[0028] A magnet 31 that can attract the lower end of the screw 5 is provided on the upper surface of the upper pressure cylinder 3. A screw sleeve 21 that can be connected to the upper pressure cylinder 3 is provided above the lower base cylinder 2. By turning the screw sleeve 21, the lower base cylinder 2 and the upper pressure cylinder 3 can be combined or separated.

[0029] A hydraulic tank 6 is provided on the upper surface of the base plate 1 and on one side of the support frame 11. A hydraulic pump 7 is provided above the hydraulic tank 6. The inlet end of the hydraulic pump 7 is connected to the hydraulic tank 6 below through a pipeline. The outlet end of the hydraulic pump 7 is connected to the upper pressure cylinder 3 through a connecting pipe 71. The lower end of the hydraulic tank 6 is connected to the lower base cylinder 2 through a return pipe 61, forming a closed hydraulic circulation system.

[0030] The procedure for using this scheme is as follows: Before the experiment begins, the upper pressure cylinder 3 is separated from the lower base cylinder 2, and the rock column 8 to be tested is placed inside the lower base cylinder 2. Then, the upper pressure cylinder 3 is lowered and connected and fixed to the lower base cylinder 2 by the screw sleeve 21.

[0031] After the upper pressure cylinder 3 is lowered, the hydraulic cylinder 4 is activated, and the telescopic rod 41 descends to push the lower pressure plate 42 to press down the rock column 8, thus performing longitudinal pressure testing on the rock column 8.

[0032] After the telescopic rod 41 is activated, the hydraulic pump 7 starts, and the pressurized liquid enters the upper pressure cylinder 3 and the lower base cylinder 2 through the connecting pipe 71, applying pressure to the rock column 8 from all sides. The pressure sensor 24 monitors the pressure changes in real time to ensure the accuracy of the experimental data.

[0033] By adjusting the flow rate of hydraulic pump 7, the pressure on the surrounding rock column 8 can be precisely controlled to meet different experimental requirements. After the experiment, valve 22 installed on one side of the lower base cylinder 2 is opened, and the pressurized liquid returns to hydraulic tank 6 through return pipe 61, and the system automatically depressurizes to ensure safety.

[0034] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. A rock mechanics experimental apparatus, comprising a base plate (1), characterized in that: A support frame (11) is provided above the base plate (1), and a telescopic frame (12) is installed inside the support frame (11). A horizontal top plate (13) is connected above the telescopic frame (12). A hydraulic cylinder (4) is fixed above the top plate (13) by a screw (5). The telescopic rod (41) of the hydraulic cylinder (4) passes downward through the top plate (13) and is connected to the pressure plate (42). A lower base cylinder (2) is provided on the upper surface of the base plate (1) and below the telescopic rod (41). An upper pressure cylinder (3) is provided above the lower base cylinder (2). An opening for the telescopic rod (41) to pass through is provided in the middle of the upper pressure cylinder (3).

2. The rock mechanics experimental apparatus as described in claim 1, characterized in that: A hydraulic tank (6) is provided on the upper surface of the base plate (1) and on one side of the support frame (11). A hydraulic pump (7) is provided above the hydraulic tank (6). The inlet end of the hydraulic pump (7) is connected to the hydraulic tank (6) below through a pipeline. The outlet end of the hydraulic pump (7) is connected to the upper pressure cylinder (3) through a connecting pipe (71). The lower end of the hydraulic tank (6) is connected to the lower base cylinder (2) through a return pipe (61), forming a closed hydraulic circulation system.

3. The rock mechanics experimental apparatus as described in claim 2, characterized in that: A valve (22) for controlling the opening and closing of the return pipe (61) is provided on one side of the lower base cylinder (2).

4. The rock mechanics experimental apparatus as described in claim 1, characterized in that: The lower base cylinder (2) is provided with a base (23) for placing the rock column (8) inside, and a pressure sensor (24) is provided on one side of the base (23).

5. The rock mechanics experimental apparatus as described in claim 1, characterized in that: The upper surface of the upper pressure cylinder (3) is provided with a magnet (31) that can attract the lower end of the screw (5).

6. The rock mechanics experimental apparatus as described in claim 1, characterized in that: The lower base cylinder (2) and the upper pressure cylinder (3) are connected by a threaded sleeve (21).

7. The rock mechanics experimental apparatus as described in claim 1, characterized in that: The lower end of the telescopic frame (12) is inserted into the support frame (11), and the two are fixed together by bolts.

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