Compaction die for applying different confining pressure states

Abstract

The utility model discloses a compaction mould of applying different confining pressure state, including confining pressure device and base, the confining pressure device is composed of confining pressure plate, confining pressure column, cover plate, bolt, compression spring, strain gauge and shell, the confining pressure column, bolt and shell are equipped with corresponding screw thread, the confining pressure column and shell pass through the screw thread connection, and the cover plate is equipped with the cover plate. The strain gauge is attached between the confining pressure column and the confining pressure plate, the confining pressure column can be sleeved with the compression spring, and the confining pressure device is placed on the base. The confining pressure device for providing confining pressure in different states is additionally arranged, and the confining pressure device can be placed on the base so as to stabilize the confining pressure device. When a traditional compaction mold applies pressure to rock in a compression experiment, the influence of peripheral confining pressure is not considered, a rock sample is directly taken out after compression is completed, the measuring device is additionally provided with a confining pressure device to provide peripheral confining pressure, and rigid confining pressure and elastic confining pressure can be selected according to requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of compaction molds, in particular to a compaction mold applying different confining pressure states. Background Art

[0002] Currently, there is no equipment for measuring rock compaction rate that can apply different confining pressure states to simulate the confining pressure applied to it on both sides of the tunnel after the collapse above the underground goaf and the confining pressure along the excavation direction. This will affect the impact of the hydraulic press on the relevant experimental data during compression. Therefore, we propose a new type of compaction mold that applies different confining pressure states. Utility Model Content

[0003] The utility model provides a compaction die applying different confining pressure states to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A compaction mold for applying different confining pressure states comprises a confining pressure device and a base, wherein the confining pressure device consists of a confining pressure plate, a confining pressure column, a cover plate, bolts, a compression spring, a strain gauge and a shell, wherein the confining pressure column, the bolts and the shell are threaded with corresponding threads, the confining pressure column is connected to the shell by threads, the strain gauge is attached between the confining pressure column and the confining pressure plate, the compression spring can be sleeved on the confining pressure column, and the confining pressure device is placed on the base.

[0006] As a further improvement of the technical solution: the confining pressure plates are divided into two types, one for determining the longitudinal distance and the other for determining the transverse distance, both of which are made of 12 mm thick steel plates.

[0007] As a further improvement of the technical solution: the outer shell and cover plate of the confining pressure device are made of 12 mm thick steel plate.

[0008] As a further improvement of the technical solution: the confining pressure device is a double-layer structure, and the inner layer is composed of two transverse confining pressure plates and two longitudinal confining pressure plates.

[0009] As a further improvement of the technical solution: the compression spring is selected to have a large spring coefficient, and its diameter is slightly larger than the diameter of the confining pressure column so that it can be mounted thereon.

[0010] As a further improvement of the technical solution: the confining pressure column is provided with an external thread, the corresponding outer shell is provided with an internal thread, and the bolts fix the confining pressure column.

[0011] As a further improvement of the technical solution: the side length of the quadrilateral of the base is slightly larger than the side length of the confining pressure device.

[0012] As a further improvement of the technical solution: the confining pressure device can be placed on a base to stabilize the confining pressure device.

[0013] As a further improvement of the technical solution: the strain gauge is attached between the confining pressure column and the confining pressure plate.

[0014] As a further improvement of the technical solution: the confining pressure column can move freely on the shell through the thread to control the corresponding distance.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model improves the compaction mold in the traditional compression experiment, adds a confining pressure device that provides confining pressures in different states, and the confining pressure device can be placed on a base to stabilize the confining pressure device. When the traditional compaction mold applies pressure to the rock in the compression experiment, the influence of the surrounding pressure is not considered, and the rock sample is directly taken out after the compression is completed. The measuring device adds a confining pressure device to provide confining pressure on all sides, and rigid and elastic confining pressures can be selected according to needs. Due to the use of the above-mentioned confining pressure device, the utility model realizes the provision of surrounding pressure when the rock is compacted, so that the relevant experimental data is more accurate.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 2 It is a three-dimensional picture of the confining pressure column in the utility model;

[0021] Figure 3 A three-dimensional picture of the housing in the utility model;

[0022] Figure 4 A three-dimensional picture of a bolt in the utility model;

[0023] Figure 5 A three-dimensional picture of the compression spring in the utility model;

[0024] Figure 6A picture of a strain gauge in the utility model;

[0025] Figure 7 A three-dimensional picture of the base in the utility model;

[0026] Figure 8 This is a picture of the lower part of the base in the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Confining pressure column; 2. Outer shell; 3. Bolts; 4. Cover; 5. Compression spring; 6. Strain gauge; 7. Base. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] See also Figures 1 to 8 In an embodiment of the utility model, a compaction mold for applying different confining pressure states includes a confining pressure device and a base. The confining pressure device is composed of a confining pressure plate, a confining pressure column, a cover plate, bolts, a compression spring, a strain gauge and a shell. The confining pressure column, the bolts and the shell are threaded with corresponding threads. The confining pressure column and the shell are connected by threads. The strain gauge is attached between the confining pressure column and the confining pressure plate. The compression spring can be put on the confining pressure column. The confining pressure device is placed on the base.

[0033] See also Figure 1 There are two types of confining pressure plates, one for determining the longitudinal distance and the other for determining the transverse distance. Both are made of 12mm thick steel plates. The use of transverse and longitudinal fence plates can facilitate the quick determination of transverse and vertical distances.

[0034] See also Figure 1 and Figure 3 The shell and cover of the confining pressure device are made of 12mm thick steel plate. The shell and cover of the confining pressure device made of 2mm thick steel plate have the characteristics of high hardness and not easy to deform. They can easily withstand pressures of different sizes and are convenient for confining pressure tests, which can meet daily use needs.

[0035] See also Figure 1 and Figure 3 The confining pressure device has a double-layer structure, and the inner layer is composed of two horizontal confining pressure plates and two vertical confining pressure plates. The inner layer of the confining pressure device and the two horizontal confining pressure plates and the two vertical confining pressure plates can make the pressure test data more accurate and also facilitate daily test operations.

[0036] See also Figure 5 The compression spring should have a large coefficient of stiffness. Its diameter should be slightly larger than the diameter of the confining pressure column so that it can be put on it. By selecting a compression spring with a large coefficient of stiffness, it can easily meet the daily pressure test. At the same time, a compression spring with a large coefficient of stiffness can avoid the situation where the compression spring fails due to excessive pressure.

[0037] See also Figure 1-3 The confining pressure column is provided with an external thread, the corresponding outer shell is provided with an internal thread, the confining pressure column is fixed with bolts, and the confining pressure column is limited and fixed by the bolts. At the same time, the external thread on the confining pressure column is adapted to the thread on the outer shell.

[0038] See also Figure 1-8 The side length of the quadrilateral of the base is slightly larger than the side length of the confining pressure device. By setting the side length of the quadrilateral of the base to be slightly larger than the side length of the confining pressure device, the confining pressure device can be stably placed on the base.

[0039] See also Figure 1-8 The confining pressure device can be placed on the base to stabilize the confining pressure device, and the base is used to limit and fix the confining pressure device, so that the confining pressure device can be stably placed on the base for daily use.

[0040] See also Figure 1-8 The strain gauge is attached between the confining pressure column and the confining pressure plate. By attaching the strain gauge on the contact surface between the confining pressure column and the confining pressure plate, it is convenient to calculate the rigid confining pressure after the test.

[0041] See also Figure 1-8 The confining pressure column can move freely on the shell through the thread to control the corresponding distance. By controlling the moving distance of the confining pressure column, the distance between the confining pressure plates can be controlled.

[0042] The working principle of the utility model is: first assemble the confining pressure device, after the assembly is completed, place the confining pressure device on a base to stabilize the confining pressure device, place the rock sample in the waiting area among the four confining pressure plates, and then start the compression test. During the compression process, the confining pressure column and the confining pressure plate provide corresponding confining pressure, and strain gauges can be attached to the contact surfaces between the confining pressure column and the confining pressure plate. After the test is completed, the rigid confining pressure can be calculated. In addition, compression springs can be put on different confining pressure columns to convert them into elastic confining pressure, and the elastic confining pressure can be calculated according to the stiffness coefficient of the compression spring.

[0043] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A compaction die for applying different confining pressure states, characterized in that: It includes a confining pressure device and a base. The confining pressure device is composed of a confining pressure plate, a confining pressure column, a cover plate, bolts, a compression spring, a strain gauge and a shell. The confining pressure column, the bolts and the shell are threaded with corresponding threads. The confining pressure column is connected to the shell by threads. The strain gauge is attached between the confining pressure column and the confining pressure plate. The compression spring can be sleeved on the confining pressure column. The confining pressure device is placed on the base.

2. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The confining pressure plates are divided into two types, one for determining the longitudinal distance and the other for determining the transverse distance, both of which are made of 12 mm thick steel plates.

3. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The shell and cover plate of the confining pressure device are made of 12 mm thick steel plates.

4. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The confining pressure device is a double-layer structure, and the inner layer is composed of two transverse confining pressure plates and two longitudinal confining pressure plates.

5. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The compression spring is selected to have a large spring coefficient, and its diameter should be slightly larger than the diameter of the confining pressure column so that it can be mounted on it.

6. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The confining pressure column is provided with an external thread, the corresponding outer shell is provided with an internal thread, and the bolts fix the confining pressure column.

7. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The side length of the quadrilateral of the base is slightly greater than the side length of the confining pressure device.

8. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The confining pressure device may be placed on a base to stabilize the confining pressure device.

9. A compaction die for applying different confining pressure states according to claim 1, characterized in that: The confining pressure column can be freely moved on the shell through the thread to control the corresponding distance.

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