Three-soft coal roadway prestress test device

Abstract

The utility model relates to the technical field of coal roadway prestress test, and discloses a three-soft coal roadway prestress test device which comprises a roadway and a base, a second connecting column is slidably connected in the roadway, a steel cable is slidably connected in the second connecting column, an elastic column is slidably connected to the outer wall of the steel cable, and the elastic column is fixedly connected with the base. A threaded column is fixedly connected to the side wall of the elastic column, the outer wall of the elastic column is in threaded connection with the interior of the steel cable, a slope is arranged in the second connecting column, and threads are arranged in the slope. According to the utility model, through the cooperation among the threaded column, the elastic column and the second connecting column, the effect of stably fixing the steel cable is achieved, the problems that a traditional anchoring device cannot stably fix the steel cable and is inconvenient to fix are solved, the firm and reliable fixation of the steel cable is ensured, the long-term stable operation of the test device is effectively supported, and the test efficiency is improved. And the stability of the coal roadway prestress test device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prestress tests in coal roadways, and particularly relates to a prestress test device for a "three-soft" coal roadway. Background Art

[0002] The prestress test in a coal roadway refers to a test carried out in coal mine engineering for soft rock roadways (usually roadways composed of soft rock and weak strata). The purpose of this test is to simulate and evaluate the mechanical response and structural behavior of the roadway in actual engineering by applying pre-designed internal forces or stresses to the coal roadway structure.

[0003] Traditional prestress test devices for "three-soft" coal roadways include a prestress loading system, a strain measurement device, a force sensor and a load detail measurement system, a control system and a data acquisition unit, as well as a support structure and safety equipment. The prestress loading system is responsible for applying prestress to the coal roadway structure, including a prestress anchoring system and tensioning equipment; the strain measurement device is used to monitor the strain changes in the structure; the force sensor and the load detail measurement system measure the forces applied to the structure; the control system adjusts the loading operation; the data acquisition unit records the data during the test; the support structure and safety equipment ensure the safety and stability of the test.

[0004] However, there are some potential problems with the traditional prestress anchoring system that has a single structure and the practice of knocking in a hollow column. First of all, knocking in a hollow column can lead to insecure anchoring in some cases, especially when the rock texture is poor or the coal roadway structure is irregular. This anchoring method also causes microcracks or damage to the surrounding materials, thus affecting the long-term stability and reliability of the anchoring. Therefore, a prestress test device for a "three-soft" coal roadway is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a prestress test device for a "three-soft" coal roadway, aiming to improve the problem that the steel cable cannot be effectively fastened by using a hollow column to knock and anchor in the existing technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A prestress test device for a "three-soft" coal roadway includes a roadway and a base. A second connecting column is slidably connected inside the roadway. A steel cable is slidably connected inside the second connecting column. An elastic column is slidably connected to the outer wall of the steel cable. A threaded column is fixedly connected to the side wall of the elastic column. The outer wall of the elastic column is threadedly connected inside the steel cable. A slope is provided inside the second connecting column, and threads are provided inside the slope. A lifting mechanism is provided on the top of the base, and the lifting mechanism is used to control the height of the second support plate.

[0008] As a further description of the above technical solution:

[0009] The lifting mechanism includes a motor, the bottom of the motor is fixedly connected to the top of the base, the output end of the motor is fixedly connected with a threaded rod, the outer wall of the threaded rod is threadedly connected with a first connecting block, and the side wall of the first connecting block is fixedly connected with a fixing column;

[0010] As a further description of the above technical solution:

[0011] The outer wall of the fixing column is rotatably connected with a first connecting rod, and the top of the first connecting rod is fixedly connected with a second support plate;

[0012] As a further description of the above technical solution:

[0013] The top of the second support plate is fixedly connected with a first support plate, the top of the first support plate is fixedly connected with a hollow column, and a second fixing plate is fixedly connected inside the hollow column;

[0014] As a further description of the above technical solution:

[0015] The side wall of the second fixing plate is fixedly connected with a second hydraulic cylinder, the output end of the second hydraulic cylinder is fixedly connected with a first fixing plate, and a first connecting column is arranged inside the first fixing plate;

[0016] As a further description of the above technical solution:

[0017] The side wall of the first fixing plate is fixedly connected with a slide rail, the inner wall of the slide rail is slidably connected with a slider, and the side wall of the slider is fixedly connected with a clamping block;

[0018] As a further description of the above technical solution:

[0019] The side wall of the first fixing plate is fixedly connected with a first hydraulic cylinder, and the output end of the first hydraulic cylinder is fixedly connected to the side wall of the clamping block;

[0020] As a further description of the above technical solution:

[0021] The top of the base is fixedly connected with a handrail, and the bottom of the base is fixedly connected with universal wheels.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, through the cooperation among the threaded column, the elastic column and the second connecting column, the effect of stably fixing the steel cable is achieved, solving the problems that the traditional anchoring device cannot stably fix the steel cable and is not convenient for fixing, ensuring that the steel cable is firmly fixed, thus effectively supporting the long-term stable operation of the test device and improving the stability of the prestressed test device for coal roadway.

[0024] 2. In the present utility model, the clamping block is driven by the slider to move. The movement of the clamping block fixes one side of it on the outer wall of the first connecting column, and at the same time, the clamping block slides on the side wall of the first fixed disk, achieving the effect of fixing the first connecting column, solving the problem that the first connecting column cannot be stably fixed, resulting in position deviation during the process of tensioning the first connecting column, and improving the practicability of the prestress test device for coal roadways. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a three-dimensional schematic diagram of a prestress test device for a three-soft coal roadway proposed by the present utility model;

[0026] Figure 2 is an internal structural schematic diagram of the hollow column of a prestress test device for a three-soft coal roadway proposed by the present utility model;

[0027] Figure 3 is a top structural schematic diagram of the base of a prestress test device for a three-soft coal roadway proposed by the present utility model;

[0028] Figure 4 is a sectional structural schematic diagram of the second connecting column of a prestress test device for a three-soft coal roadway proposed by the present utility model.

[0029] Legend:

[0030] 1. Roadway; 2. Steel cable; 3. Base; 4. Hollow column; 5. First support plate; 6. First connecting rod; 7. Handrail; 8. Second support plate; 9. First fixed disk; 10. First hydraulic cylinder; 11. Clamping block; 12. Slider; 13. First connecting column; 14. Second hydraulic cylinder; 15. Second fixed disk; 16. Motor; 17. Threaded rod; 18. First connecting block; 19. Universal wheel; 20. Second connecting column; 21. Elastic column; 22. Threaded column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0032] Refer to Figure 1 and Figure 4, an embodiment provided by the present utility model: a prestress test device for a three-soft coal roadway, including a roadway 1 and a base 3. A second connecting column 20 is slidably connected inside the roadway 1. A steel cable 2 is slidably connected inside the second connecting column 20. An elastic column 21 is slidably connected to the outer wall of the steel cable 2. A threaded column 22 is fixedly connected to the side wall of the elastic column 21. The outer wall of the elastic column 21 is threadedly connected inside the steel cable 2. A slope is provided inside the second connecting column 20, and threads are provided inside the slope.

[0033] Specifically, the steel cable 2 is installed inside the first connecting column 13. Subsequently, by rotating the threaded column 22, the rotation of the threaded column 22 drives the elastic column 21 on the side wall to rotate. The rotation of the elastic column 21 simultaneously affects the inside of the second connecting column 20 because the outer wall of the elastic column 21 is provided with threads. This rotation action causes the elastic column 21 to enter the inside of the second connecting column 20. At the same time, the elastic setting of the elastic column 21 makes its inner wall firmly fixed around the steel cable 2, thereby stably fixing the steel cable 2.

[0034] Refer to Figure 1 and Figure 2 , a first support plate 5 is fixedly connected to the top of the second support plate 8. A hollow column 4 is fixedly connected to the top of the first support plate 5. A second fixed disk 15 is fixedly connected inside the hollow column 4. A second hydraulic cylinder 14 is fixedly connected to the side wall of the second fixed disk 15. The output end of the second hydraulic cylinder 14 is fixedly connected to a first fixed disk 9. A first connecting column 13 is provided inside the first fixed disk 9. A slide rail is fixedly connected to the side wall of the first fixed disk 9. A slider 12 is slidably connected to the inner wall of the slide rail. A clamping block 11 is fixedly connected to the side wall of the slider 12. A first hydraulic cylinder 10 is fixedly connected to the side wall of the first fixed disk 9. The output end of the first hydraulic cylinder 10 is fixedly connected to the side wall of the clamping block 11.

[0035] Specifically, the output end of the first hydraulic cylinder 10 drives the clamping block 11 to move. One side of the clamping block 11 clamps the outer wall of the first connecting column 13. At the same time, the movement of the clamping block 11 causes the slider 12 on the side wall to slide inside the slide rail, and the slide rail is fixed to the side wall of the first fixed disk 9 to ensure the stable fixation of the first connecting column 13. Next, the output end of the second hydraulic cylinder 14 drives the first fixed disk 9 to move. The movement of the first fixed disk 9 further pulls the first connecting column 13 to achieve the stretching effect on the steel cable 2.

[0036] Refer to Figure 1 and Figure 3, a lifting mechanism is provided at the top of the base 3. The lifting mechanism is used to control the height function of the second support plate 8. The lifting mechanism includes a motor 16. The bottom of the motor 16 is fixedly connected to the top of the base 3. The output end of the motor 16 is fixedly connected to a threaded rod 17. A first connecting block 18 is threadedly connected to the outer wall of the threaded rod 17. A fixing column is fixedly connected to the side wall of the first connecting block 18. A first connecting rod 6 is rotatably connected to the outer wall of the fixing column. The top of the first connecting rod 6 is fixedly connected to the second support plate 8. A handrail 7 is fixedly connected to the top of the base 3. Universal wheels 19 are fixedly connected to the bottom of the base 3.

[0037] Specifically, when using the prestress test device for the three-soft coal roadway, first, the motor 16 drives the threaded rod 17 to rotate through the output end. The rotation of the threaded rod 17 causes the first connecting block 18 on the outer wall to move, and then drives the fixing column on the side wall to move simultaneously. The movement of the fixing rod further drives the first connecting rod 6 on the outer wall to rotate. The rotation of the first connecting rod 6 jacks up the second support plate 8 at the top. In addition, universal wheels 19 are fixedly connected to the bottom of the base 3, making the device easy to move and realizing the function of lifting the first support plate 5.

[0038] Working principle: When using a prestress test device for a three-soft coal roadway, first, the output end of the motor 16 drives the threaded rod 17 to rotate. The rotation of the threaded rod 17 drives the first connecting block 18 on the outer wall to move. The movement of the first connecting block 18 drives the fixing column on the side wall to move together. At the same time, the movement of the fixing rod drives the first connecting rod 6 on the outer wall to rotate. At the same time, the rotation of the first connecting rod 6 jacks up the second support plate 8 at the top. And universal wheels 19 are fixedly connected to the bottom of the base 3, facilitating the movement effect, achieving the effect of lifting the first support plate 5. Subsequently, the output end of the first hydraulic cylinder 10 drives the clamping block 11 to move. The movement of the clamping block 11 makes the outer wall of the first connecting column 13 clamped on one side. At the same time, the force on the clamping block 11 drives the slider 12 on the side wall to slide. The slider 12 slides inside the slide rail, and the slide rail is fixed to the side wall of the first fixed disk 9. At the same time, the first connecting column 13 is stably fixed. Subsequently, the output end of the second hydraulic cylinder 14 drives the first fixed disk 9 to move. The movement of the first fixed disk 9 drives the movement, achieving the effect of stretching the steel cable 2. At the same time, a steel cable 2 is arranged inside the first connecting column 13. Subsequently, by rotating the threaded column 22, the rotation of the threaded column 22 drives the elastic column 21 on the side wall to rotate. At the same time, the rotation of the elastic column 21 is inside the second connecting column 20. At the same time, threads are provided on the outer wall of the elastic column 21, and the elastic column 21 rotates into the inside of the second connecting column 20. And the elasticity of the elastic column 21 is set so that the inner wall is fixed inside the steel cable 2, achieving the effect of stably fixing the steel cable 2.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A three-soft coal roadway prestressing test device, comprising a roadway (1) and a base (3), characterized in that: The tunnel (1) is slidably connected to a second connecting column (20), the second connecting column (20) is slidably connected to a steel cable (2), the outer wall of the steel cable (2) is slidably connected to an elastic column (21), the side wall of the elastic column (21) is fixedly connected to a threaded column (22), the outer wall of the elastic column (21) is threadedly connected to the inside of the steel cable (2), a slope is provided inside the second connecting column (20), and threads are provided inside the slope, and a lifting mechanism is provided on the top of the base (3), and the lifting mechanism is used to control the height function of the second support plate (8).

2. A three-soft coal roadway prestressing test device according to claim 1, characterized in that: The lifting mechanism comprises a motor (16), the bottom of the motor (16) is fixedly connected to the top of the base (3), the output end of the motor (16) is fixedly connected to a threaded rod (17), the outer wall of the threaded rod (17) is threadedly connected to a first connecting block (18), and the side wall of the first connecting block (18) is fixedly connected to a fixing column.

3. A three-soft coal roadway prestressing test device according to claim 2, characterized in that: The outer wall of the fixed column is rotatably connected to a first connecting rod (6), and the top of the first connecting rod (6) is fixedly connected to a second supporting plate (8).

4. A three-soft coal roadway prestressing test device according to claim 3, characterized in that: The second support plate (8) is fixedly connected to the top of the first support plate (5), the first support plate (5) is fixedly connected to the top of the hollow column (4), and the second fixed plate (15) is fixedly connected inside the hollow column (4).

5. A three-soft coal roadway prestressing test device according to claim 4, characterized in that: The side wall of the second fixed plate (15) is fixedly connected to a second hydraulic cylinder (14), the output end of the second hydraulic cylinder (14) is fixedly connected to a first fixed plate (9), and a first connecting column (13) is arranged inside the first fixed plate (9).

6. A three-soft coal roadway prestressing test device according to claim 5, characterized in that: The side wall of the first fixed plate (9) is fixedly connected to a slide rail, the inner wall of the slide rail is slidably connected to a slider (12), and the side wall of the slider (12) is fixedly connected to a clamping block (11).

7. A three-soft coal roadway prestressing test device according to claim 6, characterized in that: A first hydraulic cylinder (10) is fixedly connected to the side wall of the first fixed plate (9), and an output end of the first hydraulic cylinder (10) is fixedly connected to the side wall of the clamping block (11).

8. The three-soft coal roadway prestressing test device according to claim 1 is characterized by: The top of the base (3) is fixedly connected to a handrail (7), and the bottom of the base (3) is fixedly connected to a universal wheel (19).

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