A rock compressive strength on-site testing device

Abstract

The utility model discloses a kind of rock compressive strength field testing devices, including placing bottom plate, the top of placing bottom plate is fixedly installed with two side plates, two side plates are fixedly installed with connecting fixed plate between, two rotating seats are rotatably installed with between two side plates, rock sample placing bottom tray is fixedly installed between two rotating seats, horizontal blocking component is arranged between side plate and rock sample placing bottom tray, vertically pressure rod is movably installed on connecting fixed plate, the top of vertically pressure rod is provided with drilling rig connecting component, the rock compressive strength field testing device, rock that needs to be tested is placed on rock sample placing bottom tray, the drilling rig connecting component set, vertically pressure rod is conveniently connected with drilling rig drill rod, drilling rig is operated to drive vertically pressure rod to move downwards, pressurize rock sample fixed in fixed groove, when drilling rig is continuously pressurized, to rock sample burst damage, the reading of rock sample burst is measured by manometer as compressive strength limit value.

Description

Technical Field

[0001] This utility model relates to the field of rock compressive strength testing technology, and in particular to a field testing device for rock compressive strength. Background Technology

[0002] With the acceleration of urbanization, the workload of construction projects is increasing, and geotechnical engineering investigation is an essential part of construction. The existing geotechnical engineering investigation method is mainly drilling. In the current investigation site, due to the uneven weathering of rocks and the different standards for judging the degree of rock weathering by different technicians on site, as well as the tight construction period on site (especially for advance drilling investigation), it is necessary to quickly and accurately identify moderately weathered rocks, and compressive strength is an important factor in the judgment.

[0003] Currently, the methods related to the project mainly focus on using the drop hammer penetration method and external equipment such as hydraulic jacks to carry out the test. The existing instruments and equipment rely too much on auxiliary equipment such as jacks and do not rely on available equipment on site. They are greatly affected by the site environment, and there are problems such as inconvenience in carrying and the delicate parts of the equipment being susceptible to damage. Therefore, a field testing device for rock compressive strength is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a field testing device for rock compressive strength. This simple device, which is integrated with a drilling rig (i.e., integrates with existing equipment on site to the greatest extent possible), assists in the identification of moderately and slightly weathered rocks during on-site exploration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A field testing device for rock compressive strength includes a base plate, two side plates fixedly mounted on the top of the base plate, a connecting plate fixedly mounted between the two side plates, a rotating seat rotatably mounted between the two side plates, a rock sample placement base fixedly mounted between the two rotating seats, a horizontal blocking assembly between the side plates and the rock sample placement base, a vertical pressure rod movably mounted on the connecting plate, a drilling rig connecting assembly at the top of the vertical pressure rod, a pressure gauge fixedly mounted at the bottom of the vertical pressure rod, a test pressure plate fixedly mounted at the bottom of the pressure gauge, and an annular protective cover movably mounted on the rock sample placement base. A downward placement assembly is provided between the annular protective cover and the connecting plate.

[0006] Preferably, the drilling rig connection assembly includes a threaded groove at the top of the vertical pressure rod, and a drilling rig rod is provided above the connecting fixing plate, with the bottom end of the drilling rig rod matching the threaded groove.

[0007] Preferably, the downward placement assembly includes guide posts movably mounted on the connecting fixing plate, the bottom end of the guide posts being fixedly mounted on the top of the annular protective cover, and connecting blocks being fixedly mounted on the top of the two guide posts on adjacent sides.

[0008] Preferably, a compression spring is fixedly installed between the annular protective cover and the connecting fixing plate, and a bottom contact groove is provided on the top of the rock sample placement chassis. The bottom contact groove is annular in structure, and the bottom of the annular protective cover is located in the bottom contact groove.

[0009] Preferably, the horizontal blocking assembly includes a set of horizontally positioned plugs movably mounted on the side plate, and a set of horizontally positioned plug slots are provided on the side of the rock sample placement chassis, with the horizontally positioned plugs inserted into the horizontally positioned plug slots.

[0010] Preferably, one end of a group of horizontally positioned plug-in posts is fixedly installed with the same end connecting plate, and a return spring is fixedly installed between the end connecting plate and the side plate.

[0011] Preferably, the bottom of the placement base plate is provided with multiple adjustment brackets, and both side plates are provided with horizontal adjustment bubbles. The top of the rock sample placement base plate is provided with a fixing groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This on-site rock compressive strength testing device requires testing the compressive strength of rocks. The rock to be tested is placed on the rock sample placement base. The drill connection component facilitates the connection of the vertical pressure rod to the drill rod. The drill is operated to drive the vertical pressure rod downward to pressurize the rock sample fixed in the fixed groove. When the drill continuously pressurizes until the rock sample bursts and breaks, the reading at the time of rock sample bursting is measured by the pressure gauge as the compressive strength limit value. It can be combined with existing on-site equipment to the greatest extent for testing. The arc-shaped protective cover forms a good protective barrier, preventing rock fragments from flying around and injuring nearby workers during crushing. After the test, the rock sample placement chassis can be rotated and flipped to facilitate the cleaning of the debris on the surface. The horizontal blocking component can horizontally block and limit the position of the rock sample placement chassis. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention viewed from the left side; Figure 2 This is a three-dimensional structural diagram of the present invention viewed from the right side; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0014] In the diagram: 1. Base plate; 2. Adjustment bracket; 3. Side plate; 4. Rock sample placement base; 5. Rotary seat; 6. Fixing groove; 7. Horizontal insertion post; 8. End connecting plate; 9. Return spring; 10. Horizontal insertion slot; 11. Connecting fixing plate; 12. Vertical pressure rod; 13. Threaded groove; 14. Drill rod; 15. Pressure gauge; 16. Test pressure plate; 17. Guide post; 18. Annular protective cover; 19. Bottom contact groove; 20. Compression spring; 21. Horizontal adjustment bubble. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Refer to Figure 1-4 A field testing device for rock compressive strength includes a base plate 1, two side plates 3 fixedly mounted on the top of the base plate 1, a connecting plate 11 fixedly mounted between the two side plates 3, a rotating seat 5 rotatably mounted between the two side plates 3, a rock sample placement base 4 fixedly mounted between the two rotating seats 5, a horizontal blocking assembly between the side plates 3 and the rock sample placement base 4, a vertical pressure rod 12 movably mounted on the connecting plate 11, a drilling rig connection assembly at the top of the vertical pressure rod 12, and a pressure gauge 15 fixedly mounted at the bottom of the vertical pressure rod 12. A test pressure plate 16 is installed, and an annular protective cover 18 is movably placed on the rock sample placement chassis 4. A downward placement component is provided between the annular protective cover 18 and the connecting fixing plate 11. Multiple adjusting brackets 2 are provided at the bottom of the placement chassis 1. Horizontal adjustment bubbles 21 are provided on both side plates 3. A fixing groove 6 is provided at the top of the rock sample placement chassis 4. Horizontal adjustment bubbles 21 are provided on the side plates 3. By observing the two horizontal adjustment bubbles 21, the entire equipment is in a horizontal state. The adjusting brackets 2 can be rotated to adjust their height, thereby meeting the adjustment support for the horizontal state.

[0017] Specifically, the drilling rig connection assembly includes a threaded groove 13 at the top of the vertical pressure rod 12, and a drilling rod 14 above the connecting fixing plate 11. The bottom end of the drilling rod 14 is adapted to the threaded groove 13. The rock to be tested is placed on the rock sample placement base 4. The fixed groove 6 facilitates stable placement of the rock and prevents displacement and slippage during the test. Before placing the rock, both ends of the rock can be simply ground until they are flat to facilitate stable placement and compression testing. Then, the drilling rig used on site is drilled. The end of rod 14 is connected to the end of vertical pressure rod 12. The threaded groove 13 enables threaded connection. When the drilling rig is operated to press down the drilling rod 14, it drives the vertical pressure rod 12 to move downward, pressurizing the rock sample fixed in the fixed groove 6. When the drilling rig continuously pressurizes until the rock sample bursts and breaks, the reading at the time of rock sample bursting is measured by pressure gauge 15 as the compressive strength limit value. This equipment is temporarily applicable to the compressive strength determination of argillaceous rock. According to general experience with argillaceous rock, this device will define rocks with compressive strength of less than 10 MPa as moderately weathered rocks and those with compressive strength greater than 10 MPa as slightly weathered rocks.

[0018] Specifically, the lowering placement component includes guide posts 17 movably mounted on the connecting fixing plate 11. The bottom end of the guide posts 17 is fixedly mounted on the top of the annular protective cover 18. Connecting blocks are fixedly mounted on the top of the two guide posts 17 on adjacent sides. A compression spring 20 is fixedly installed between the annular protective cover 18 and the connecting fixing plate 11. The top of the rock sample placement chassis 4 is provided with a bottom contact groove 19, which is an annular structure. The bottom of the annular protective cover 18 is located inside the bottom contact groove 19. During the compression test, the rock sample is surrounded by the annular protective cover 18. The annular protective cover 18 forms a good protective barrier, preventing rock fragments from flying around and causing injury to surrounding personnel when the sample is crushed.

[0019] Specifically, the horizontal blocking assembly includes a set of horizontally positioned insertion posts 7 movably mounted on the side plate 3. A set of horizontally positioned insertion slots 10 are provided on the side of the rock sample placement chassis 4. The horizontally positioned insertion posts 7 are inserted into the horizontally positioned insertion slots 10. One end of each set of horizontally positioned insertion posts 7 is fixedly mounted with the same end connecting plate 8. A return spring 9 is fixedly installed between the end connecting plate 8 and the side plate 3. After the test, the drill rod moves back to its original position, and the operator continues to push the annular protective cover 18 upwards. Then, the surrounding operators pull the end connecting plate 8 outwards, and the return spring 9... Under tension, a set of horizontally positioned plug pins 7 will disengage from the horizontally positioned plug slot 10. At this time, the rock sample placement base 4 will be able to rotate. After the fixed groove 6 rotates to the bottom, it is convenient to clean the broken rocks. After cleaning, the rock sample placement base 4 is placed and the end connecting plate 8 is loosened. Under the tension of the return spring 9, a set of horizontally positioned plug pins 7 will move into the horizontally positioned plug slot 10, thereby fixing the position of the rock sample placement base 4. The return spring 9 has a large elastic force, and the end of the horizontally positioned plug pin 7 will not disengage from the horizontally positioned plug slot 10 during the test.

[0020] In use: During on-site exploration in geotechnical engineering, drilling rigs are used to drill holes in the rock. During drilling, it is necessary to test the compressive strength of the rock to observe whether the rock strength meets the standard. To conduct the test, the rock sample to be tested is placed on the rock sample placement platform 4. Then, the end of the drill rod 14 of the drilling rig used on site is connected to the end of the vertical pressure rod 12. The drilling rig is operated to press down the drill rod 14, causing the vertical pressure rod 12 to move downwards to pressurize the rock sample. As the drilling rig continuously increases the pressure, the rock sample eventually bursts. When the rock sample bursts during the test, the reading of the rock sample at the time of bursting is the ultimate compressive strength value. During the compression test, the rock sample is surrounded by an annular protective cover 18, which can form a good protective barrier to prevent rock fragments from flying around and causing injury to the surrounding staff when the rock sample is crushed. After the test, the end connecting plate 8 is pulled outward, and a set of horizontally positioned insertion posts 7 will disengage from the horizontally positioned insertion slot 10. At this time, the rock sample placement base 4 can rotate, which is convenient for cleaning the broken rock and is easy to use.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A field testing device for rock compressive strength, comprising a base plate (1), characterized in that, Two side plates (3) are fixedly installed on the top of the placement base plate (1). A connecting fixing plate (11) is fixedly installed between the two side plates (3). A rotating seat (5) is rotatably installed between the two side plates (3). A rock sample placement chassis (4) is fixedly installed between the two rotating seats (5). A horizontal blocking component is provided between the side plates (3) and the rock sample placement chassis (4). A vertical pressure rod (12) is movably installed on the connecting fixing plate (11). A drilling rig connecting component is provided on the top of the vertical pressure rod (12). A pressure gauge (15) is fixedly installed on the bottom of the vertical pressure rod (12). A test pressure plate (16) is fixedly installed on the bottom of the pressure gauge (15). An annular protective cover (18) is movably placed on the rock sample placement chassis (4). A downward placement component is provided between the annular protective cover (18) and the connecting fixing plate (11).

2. The field testing device for rock compressive strength according to claim 1, characterized in that, The drilling rig connection assembly includes a threaded slot (13) on the top of the vertical pressure rod (12), and a drilling rod (14) is provided above the connecting fixing plate (11), with the bottom end of the drilling rod (14) matching the threaded slot (13).

3. The field testing device for rock compressive strength according to claim 1, characterized in that, The downward placement assembly includes guide posts (17) movably mounted on the connecting fixing plate (11). The bottom end of the guide posts (17) is fixedly mounted on the top of the annular protective cover (18), and connecting blocks are fixedly mounted on the top of the two guide posts (17) on adjacent sides.

4. The rock compressive strength field testing device according to claim 3, characterized in that, A compression spring (20) is fixedly installed between the annular protective cover (18) and the connecting fixing plate (11). A bottom contact groove (19) is opened on the top of the rock sample placement chassis (4). The bottom contact groove (19) is annular in structure, and the bottom of the annular protective cover (18) is located in the bottom contact groove (19).

5. The field testing device for rock compressive strength according to claim 1, characterized in that, The horizontal blocking assembly includes a set of horizontally positioned plugs (7) movably mounted on the side plate (3). A set of horizontally positioned plug slots (10) are provided on the side of the rock sample placement chassis (4), and the horizontally positioned plugs (7) are inserted into the horizontally positioned plug slots (10).

6. The rock compressive strength field testing device according to claim 5, characterized in that, A set of horizontally positioned plugs (7) have a single end connecting plate (8) fixedly installed at one end, and a return spring (9) is fixedly installed between the end connecting plate (8) and the side plate (3).

7. The field testing device for rock compressive strength according to claim 1, characterized in that, The bottom of the placement base plate (1) is provided with multiple adjustment brackets (2), and the two side plates (3) are provided with horizontal adjustment bubbles (21). The top of the rock sample placement base plate (4) is provided with a fixing groove (6).

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