A heavy point load testing device with a safety protection structure

Abstract

A heavy-duty point load testing device with a safety protection structure includes a base and two vertically mounted main support columns. A horizontally positioned upper main support beam is installed at the top of each main support column. A lower main support crossbeam with adjustable height passes through the middle of the two main support columns. An upper clamp is located below the upper main support beam, and a lower clamp is located on the lower main support crossbeam. Two auxiliary support columns are also mounted on the base. A secondary support beam perpendicular to the upper main support beam is located above each of the two auxiliary support columns and is fixedly installed on the upper main support beam. A hanging net is provided between the upper and lower clamps. This invention uses the two auxiliary support columns and beams to form an auxiliary support system, which can connect with the main support system to form a stable three-dimensional frame, significantly improving the rigidity and stability of the frame. The hanging net can catch and buffer vertically falling and obliquely downward-splashing debris, while the anti-smashing protective cover can effectively block horizontally and obliquely upward-splashing high-speed debris.

Description

Technical Field

[0001] This utility model relates to the field of heavy point load testing technology, specifically a heavy point load testing device with a safety protection structure. Background Technology

[0002] The point load test device is a portable rock mechanical property testing device used in geotechnical engineering. Its core design is based on the test principle specified in the national standard "Standard for Test Methods of Engineering Rock Mass": a concentrated point load is applied to the rock specimen through a pair of oppositely arranged spherical-end conical indenters on the device until the specimen fails, thereby rapidly and indirectly determining the point load strength index and anisotropy index of the rock.

[0003] Existing conventional point load testing equipment typically includes a frame, a loading system, a pressure display unit, and a pair of ball-end conical indenters. The frames in current technology mostly employ a double-column structure; while this design is lightweight, its overall rigidity and stability are limited. The loading system usually uses hydraulic or mechanical methods; however, its maximum loading capacity is generally designed to be below 100 kN, making it difficult to crush rock types with high hardness or large volume, thus hindering the acquisition of relevant test data. Furthermore, manual assistance is often required to fix the specimens during the clamping process, which is not only inconvenient to operate but also poses safety hazards. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides a heavy point load testing device with a safety protection structure.

[0005] The technical solution of this utility model is as follows: A heavy point load testing device with a safety protection structure includes a base and two main support columns vertically mounted thereon. The upper ends of the two main support columns are equipped with horizontally mounted upper main support beams. A lower main support crossbeam with adjustable vertical height is passed through the middle of the two main support columns. An upper clamp is provided below the upper main support beam, and a lower clamp adapted to the upper clamp is provided on the lower main support crossbeam. The base is also equipped with two secondary support columns. The upper part of the two secondary support columns is equipped with a secondary support beam perpendicular to the upper main support beam. The secondary support beam is fixedly installed on the upper main support beam. A hanging net is provided between the upper and lower clamps. The hanging net is connected to both ends of the upper main support beam and / or the two ends of the secondary support column by multiple ropes, and is suspended above the lower clamp.

[0006] The structure of the hanging net is as follows: the hanging net is a flexible hanging net that can be woven from soft rope. The hanging net has an inverted cone-shaped structure with an opening at the lower end. The opening is for the rock specimen to pass through and contact the lower clamp without affecting the clamping test of the upper and lower clamps on the rock specimen.

[0007] Furthermore, the ratio of the maximum inner diameter of the opening to the diameter of the lower clamp is 1.2-2.

[0008] The lower main support beam is equipped with an anti-smashing protective cover. The center of the anti-smashing protective cover has a central hole with an inner diameter larger than the outer diameter of the lower clamp. The outer edge of the anti-smashing protective cover has a socket for insertion into the main support column. The anti-smashing protective cover can effectively protect the test operators, the main support column and other structures.

[0009] To ensure the protective cover does not interfere with the use of the lower chuck, the upper surface of the protective cover should not be higher than the upper end of the lower chuck.

[0010] Preferably, the outer diameters of the main support columns and the secondary support columns are the same, and the maximum vertical distance between the axes of the two main support columns is consistent with the maximum vertical distance between the axes of the two secondary support columns.

[0011] Furthermore, the length of the anti-smashing protective cover is greater than the maximum vertical distance between the two main support columns.

[0012] The specific structure of the lower main support beam that can move up and down is as follows: a jack is provided on the base, the upper end of the jack abuts against the lower end face of the lower main support beam, and the axis of the jack is coaxial with the axis of the lower clamp.

[0013] The beneficial effects of this utility model are as follows: By setting a flexible hanging net between the upper and lower clamps, the rock specimen can be effectively supported before the test, allowing the specimen to be angled and preliminarily positioned on it, effectively avoiding the high-risk operation of the experimenter directly supporting the specimen with his hands until it is clamped. Secondly, during the test, when the rock specimen fractured under pressure, the hanging net and the anti-collision protective cover installed on the lower main support beam together formed a three-dimensional protection system. The hanging net can catch and buffer the main fragments falling vertically and splashing downwards, while the anti-collision protective cover can effectively block the horizontal and upward high-speed flying debris, thus providing comprehensive protection for the operators in front and the main support column and other key components behind, preventing personal injury and equipment damage. The auxiliary support system, consisting of two secondary support columns and secondary support beams, connects with the main support system to form a stable three-dimensional frame, significantly improving the rigidity and stability of the frame. This also allows the device to withstand greater loading reactions, making it suitable for point load testing of larger, heavier, and harder rock specimens, successfully expanding the application of point load testing technology to the testing of heavy, high-strength rocks. Attached Figure Description

[0014] In the attached diagram: Figure 1 This is a structural diagram; Figure 2 This is a front view; Figure 3 This is a top view; Figure 4 Schematic diagram of the anti-smashing protective cover and hanging net structure; The components represented by the various reference numerals in the diagram are: 1. Base; 2. Main support column; 3. Upper main support beam; 4. Lower main support beam; 5. Upper clamp; 6. Lower clamp; 7. Secondary support column; 8. Secondary support beam; 9. Suspension net; 10. Rope; 11. Anti-smashing protective cover; 1101. Center hole; 1102. Insertion port; 12. Jack. Detailed Implementation

[0015] See Figure 1 and Figure 2 As shown, a heavy-duty point load testing device with a safety protection structure includes a base 1 and two vertically mounted main support columns 2. The base 1 is a counterweight box and is fixedly connected to the ground. A horizontally mounted upper main support beam 3 is installed on the upper end of the two main support columns 2. A lower main support beam 4 with adjustable height passes through the middle of the two main support columns 2. Both ends of the lower main support beam 4 have through holes that fit with the main support columns 2, allowing the lower main support beam 4 to slide against the two main support columns 2. An upper clamp 5 is located below the upper main support beam 3, and a lower clamp 6, which fits with the upper clamp 5, is located on the lower main support beam 4. A jack 12 is mounted on the base 1. The jack 12 is an electric jack, with its upper end abutting against the lower end face of the lower main support beam 4, and the axis of the jack 12 is coaxial with the axis of the lower clamp 6.

[0016] See Figure 3 As shown, the base 1 is also provided with two auxiliary support columns 7, and the upper part of the two auxiliary support columns 7 is provided with an auxiliary support beam 8 perpendicular to the upper main support beam 3. The auxiliary support beam 8 is fixedly installed on the upper main support beam 3.

[0017] A hanging net 9 is provided between the upper clamp 5 and the lower clamp 6. The hanging net 9 is connected to both ends of the upper main support beam 3 and / or both ends of the secondary support column 7 by multiple ropes 10, and is suspended above the lower clamp 6. The height of the hanging net 9 can be adjusted by the ropes 10.

[0018] See Figure 1 and Figure 4As shown, the hanging net 9 in this embodiment is a flexible hanging net 9, which can be woven from soft rope. The hanging net 9 has an inverted conical structure with an opening at its lower end, allowing the rock specimen to pass through and contact the lower clamp 6 without affecting the clamping experiment of the upper clamp 5 and the lower clamp 6 on the rock specimen. The ratio of the maximum inner diameter of the opening to the diameter of the lower clamp 6 is 1.2-2. In this embodiment, the ratio can be 1.5. The hanging net 9 can support the rock specimen, and the angle of the rock specimen on the hanging net 9 is adjustable. It is not necessary to manually hold the rock specimen until the upper clamp 5 and the lower clamp 6 clamp it, which improves the safety of the experiment. Furthermore, the hanging net 9 does not affect the test of the rock specimen when the upper clamp 5 and the lower clamp 6 clamp it.

[0019] See Figure 1 and Figure 4 As shown, during the point load test, the lateral splashing of the fractured rock fragments, including horizontal splashes around the perimeter, upward splashes, and downward splashes, could injure the test operators or impact components such as the main support column 2. Therefore, a protective cover 11 is installed on the lower main support beam 4. The protective cover 11 has a central hole 1101 in its center, the inner diameter of which is larger than the outer diameter of the lower clamp 6. The protective cover 11 is fitted onto the outside of the lower clamp 6 through the central hole 1101. The outer edge of the protective cover 11 has a connector 1102 for insertion into the main support column 2, allowing the protective cover 11 to be installed on the lower main support beam 4. The protective cover 11 effectively protects the test operators, the main support column 2, the lower main support beam 4, the jack 12, and other components.

[0020] To ensure that the anti-smashing protective cover 11 does not interfere with the use of the lower clamp 6, the upper end of the anti-smashing protective cover 11 is not higher than the upper end of the lower clamp 6. Furthermore, the length of the anti-smashing protective cover 11 is greater than the maximum vertical distance between the two main support columns 2.

[0021] The main support column 2 and the secondary support column 7 have the same outer diameter, and the maximum vertical distance between the axes of the two main support columns 2 is the same as the maximum vertical distance between the axes of the two secondary support columns 7.

Claims

1. A heavy point load testing device with a safety protection structure, comprising a base (1) and two main support columns (2) vertically arranged thereon, wherein a horizontally arranged upper main support beam (3) is installed at the upper end of the two main support columns (2), characterized in that, Two main support columns (2) are connected in the middle by a lower main support beam (4) with adjustable height. An upper clamp (5) is provided below the upper main support beam (3). A lower clamp (6) is provided on the lower main support beam (4) to match the upper clamp (5). The base (1) is also provided with two auxiliary support columns (7), and the upper part of the two auxiliary support columns (7) is provided with an auxiliary support beam (8) perpendicular to the upper main support beam (3). The auxiliary support beam (8) is fixedly installed on the upper main support beam (3). A hanging net (9) is provided between the upper clamp (5) and the lower clamp (6). The hanging net (9) is connected to both ends of the upper main support beam (3) and / or both ends of the secondary support column (7) by multiple ropes (10), and is suspended above the lower clamp (6).

2. The heavy-duty point load testing device with a safety protection structure according to claim 1, characterized in that, The suspended net (9) is a flexible suspended net (9), which is an inverted cone-shaped structure with an opening at its lower end.

3. The heavy-duty point load testing device with a safety protection structure according to claim 2, characterized in that, The ratio of the maximum inner diameter of the opening to the diameter of the lower clamp (6) is 1.2-2.

4. The heavy-duty point load testing device with a safety protection structure according to claim 1, characterized in that, The lower main support beam (4) is provided with a smash protection cover (11). The middle part of the smash protection cover (11) has a central hole (1101). The inner diameter of the central hole (1101) is larger than the outer diameter of the lower clamp (6). The outer side of the smash protection cover (11) has a plug (1102) for insertion into the main support column (2).

5. A heavy point load testing device with a safety protection structure according to claim 4, characterized in that, The upper end of the anti-smashing protective cover (11) is not higher than the upper end of the lower clamp (6).

6. The heavy point load testing device with a safety protection structure according to claim 1, characterized in that, The outer diameters of the main support column (2) and the secondary support column (7) are the same, and the maximum vertical distance between the axes of the two main support columns (2) is consistent with the maximum vertical distance between the axes of the two secondary support columns (7).

7. A heavy point load testing device with a safety protection structure according to claim 4, characterized in that, The length of the anti-smashing protective cover (11) is greater than the maximum vertical distance between the two main support columns (2).

8. The heavy-duty point load testing device with a safety protection structure according to claim 1, characterized in that, The base (1) is provided with a jack (12), the upper end of the jack (12) abuts against the lower end face of the lower main support beam (4), and the axis of the jack (12) is coaxial with the axis of the lower clamp (6).

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