Rock core compressive strength testing device

Abstract

The utility model relates to the field of compressive strength testing, and discloses a rock core compressive strength testing device which comprises a base, a rebound apparatus fixing seat, a rebound apparatus and calipers, a limiting groove is formed in one side of the base and used for containing a rock core. The two resiliometer fixing seats are symmetrically arranged by taking the center line of the limiting groove as a symmetric line, and are arranged on two sides of the top of the base in a sliding manner in a manner of being vertical to the limiting groove; the rebound apparatus is fixedly mounted in the rebound apparatus fixing seat; two jaws of the calipers are respectively hinged with one side of the resiliometer fixing seat, a sliding block is arranged at the bottom of a rotating shaft of the calipers, a sliding groove is formed in the base, and the sliding block is arranged in the sliding groove in a sliding manner. According to the utility model, the caliper is used for simultaneously controlling the two rebound apparatuses to test the compressive strength of the rock core, compared with the test of a single rebound apparatus, the test efficiency is greatly improved, and meanwhile, the caliper utilizes the lever principle, so that the physical output in the test process is effectively reduced, and time and labor are saved.

Description

Technical Field

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

[0002] In engineering surveys, rock compressive strength is generally required. The common practice is to retrieve rock cores from the site, prepare them into regular rock samples according to relevant standards, and then pressurize them using a specialized rock strength testing machine to obtain the compressive strength. A few methods use point load tests, which are then converted into rock compressive strength. Both of these methods require specialized large-scale equipment and cannot directly and quickly determine the compressive strength on-site, making them unsuitable for quickly determining the compressive strength of sandstone in construction surveys.

[0003] Based on this, the applicant proposed a test method for in-situ estimation of the compressive strength of sandstone cores, as detailed in application number 2024115006748, filed on October 29, 2024, regarding the test apparatus and method for in-situ estimation of the compressive strength of sandstone cores. The applicant believes that using a traditional rebound hammer for core compressive strength testing suffers from low testing efficiency and high labor intensity. Therefore, the applicant proposes a core compressive strength testing device that is highly efficient and saves time and labor. Utility Model Content

[0004] The present invention aims to solve the technical problems existing in the prior art. Therefore, the present invention provides a rock core compressive strength testing device that is highly efficient and saves time and effort.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A core compressive strength testing device is provided, comprising a base, a rebound hammer holder, a rebound hammer, and a caliper. The base has a limiting groove on one side for placing the core. Two rebound hammer holders are symmetrically arranged with the center line of the limiting groove as their axis of symmetry, and are slidably mounted on the top sides of the base perpendicular to the limiting groove. The rebound hammer is fixedly installed within the rebound hammer holder. The two jaws of the caliper are hinged to one side of the rebound hammer holder, and a slider is provided at the bottom of the caliper's rotating shaft. The base has a sliding groove, and the slider slides within the sliding groove.

[0007] In some alternative embodiments, the base has a first extension plate on both sides, the first extension plate has a guide rail, and the bottom of the rebound spring holder has a guide groove that is slidably connected to the guide rail.

[0008] In some alternative embodiments, the height of the base is less than 2 / 3 of the core diameter, and the depth of the limiting groove is equal to 1 / 2 of the core length.

[0009] In some optional embodiments, the base has a second extension plate at one end away from the limiting groove, and the sliding groove is disposed on the second extension plate.

[0010] In some optional embodiments, the outer wall of the rock core is ground into four planes in the front, back, left and right directions, and the rock core is placed flat in the limiting groove.

[0011] In some alternative implementations, the width of the limiting groove is equal to the distance between the two opposing planes of the rock core.

[0012] In some alternative implementations, the rebounder is a mechanical rebounder or a digital rebounder.

[0013] In some optional embodiments, the rebound spring holder consists of a base body and an end cap. The base body has an insertion hole for inserting the rebound spring, and the top of the tail end of the base body has an opening groove communicating with the insertion hole. The end cap is threaded to the tail end of the base body for tightening the rebound spring.

[0014] In some alternative implementations, a test platform is also included, the base is fixedly mounted on the test platform, and the bottom of the test platform is provided with a leveling component for adjusting the levelness of the test platform.

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

[0016] This invention utilizes calipers to simultaneously control two rebound hammers to test the compressive strength of rock cores. Compared to testing with a single rebound hammer, this greatly improves testing efficiency. At the same time, the calipers utilize the lever principle to effectively reduce physical exertion during the testing process, saving time and effort. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a top view of the core compressive strength testing device provided by this utility model at the start of the test;

[0019] Figure 2 yes Figure 1 A cross-sectional view of the provided rock core;

[0020] Figure 3 yes Figure 1 Side view of the provided base;

[0021] Figure 4 yes Figure 3 Side view of the connection between the caliper's pivot, slider, and slide groove;

[0022] Figure 5 yes Figure 1 A cross-sectional view of the provided rebound hammer mounting base;

[0023] Figure 6 yes Figure 1 A diagram showing the connection structure between the base and the guide rail is provided.

[0024] Figure 7 This is a top view of the core compressive strength testing device provided by this utility model in the testing state.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1—Base, 1.1—Limiting groove, 1.2—First extension plate, 1.3—Guide rail, 1.4—Second extension plate, 1.5—Slide groove, 2—Rebound hammer fixing seat, 2.1—Seat body, 2.1.1—Insertion hole, 2.1.2—Opening groove, 2.2—End cap, 2.3—Guide groove, 3—Rebound hammer, 4—Caliper, 4.1—Slider, A—Rock core. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. The terms "installed," "connected," and "joined" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Example 1

[0033] This embodiment provides a core compressive strength testing device, as shown in the attached figure. Figure 1 As shown, it includes a base 1, a rebound spring holder 2, a rebound spring 3, and a caliper 4, wherein:

[0034] The base 1 has a limiting groove 1.1 on one side for placing the rock core A. In this embodiment, the base 1 is preferably U-shaped, and the rock core has four flat surfaces ground into its outer wall in the front, back, left, and right directions, as shown in the attached figure. Figure 2 As shown, core A is placed flat within the limiting groove 1.1. The depth of the limiting groove 1.1 is equal to half the length of core A, allowing for testing of the core at different positions along its length. The other end of the core can be tested by inverting the core.

[0035] The two rebound hammer mounting bases 2 are symmetrically arranged with the center line of the limiting groove 1.1 as the axis of symmetry, and are slidably mounted on the top sides of the base perpendicular to the limiting groove 1.1. To ensure that the rebound hammer can act on the rock core, the height of the base 1 is less than 2 / 3 of the diameter of the rock core A. For tests that need to be performed on different horizontal planes of the rock core, the rock core can be raised by placing a pad under the rock core.

[0036] Preferably, the width of the limiting groove 1.1 is equal to the distance between the two opposing planes of the rock core A, ensuring that the distance between the rebound hammer and the test plane of the rock core is equal.

[0037] The preferred installation method for the rebound meter holder 2 on the base 1 is as follows: (see attached diagram) Figure 1 Appendix Figure 3 and attached Figure 6 As shown, the base 1 has a first extension plate 1.2 on both sides, and a guide rail 1.3 on the first extension plate 1.2. The bottom of the rebounder fixing seat 2 is provided with a guide groove 2.3 that is slidably connected to the guide rail 1.3, so that the rebounder fixing seat can be slidably installed on the guide rail on the first extension plate of the base.

[0038] The rebound spring 3 is fixedly installed inside the rebound spring mounting base 2. Preferably, as shown in the attached diagram... Figure 1 Appendix Figure 5 and attached Figure 6 As shown, the rebound hammer holder 2 in this embodiment consists of a base body 2.1 and an end cap 2.2. The base body 2.1 has an insertion hole 2.1.1 for inserting the rebound hammer 3, and the top of the tail end of the base body 2.1 has an opening groove 2.1.2 that communicates with the insertion hole 2.1.1. The end cap 2.2 is threadedly connected to the tail end of the base body 2.1 to tighten the rebound hammer 3. During installation, open the end cap, insert the rebound hammer with the reading side facing upwards into the insertion hole of the base body, and then tighten the end cap to secure the rebound hammer and prevent it from coming off the holder during testing. The opening groove on the base body will not affect the reading of the rebound hammer.

[0039] As attached Figure 1 Appendix Figure 3 and attached Figure 4 As shown, the two jaws of the caliper 4 are hinged to one side of the rebound hammer mounting base 2, and a slider 4.1 is provided at the bottom of the rotating shaft of the caliper 4. The base 1 is provided with a sliding groove 1.5, and the slider 4.1 is slidably disposed in the sliding groove 1.5. The caliper can be used to control the horizontal movement of the rebound hammer mounting base towards the rock core. During the movement, the caliper moves backward until the rebound hammer is moved to the test position. When the caliper handle is released, the rebound hammer mounting base returns to its original position under the restoring force of the rebound hammer. The specific connection structure between the caliper and the base in this embodiment is as follows: the end of the base 1 opposite to the limiting groove 1.1 is provided with a second extension plate 1.4, and the sliding groove 1.5 is provided on the second extension plate 1.4.

[0040] In this embodiment, the rebounder 3 is either a mechanical rebounder or a digital rebounder.

[0041] In practice, the testing device is fixed on a flat plate. One end of the polished rock core is inserted into the limiting groove of the base. The caliper is controlled to complete the test at the first point. Then, the rock core is pushed into the limiting groove a certain distance, and the caliper is controlled to complete the test at the second point. This process is repeated to complete the test at multiple points. The rock core is then removed, and the other end is turned over and placed into the limiting groove to complete the test at multiple points on the other end.

[0042] Example 2

[0043] Based on Embodiment 1, this embodiment is equipped with a test platform (not shown in the figure) to replace the simple flat plate in Embodiment 1. The base is fixedly installed on the test platform, and the bottom of the test platform is provided with a leveling component for adjusting the levelness of the test platform. The leveling component in this embodiment is only used to adjust the levelness of the test platform, and it is a direct application of existing technology, so it will not be described in detail here.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A core compressive strength testing device, characterized in that: It comprises a base, a rebound hammer fixing seat, a rebound hammer and a caliper, wherein: One side of the base is provided with a limiting groove for placing a core; Two rebound hammer fixing seats are symmetrically arranged with the center line of the limiting groove as the symmetry line and are perpendicularly and slidably arranged on the top of the base; The rebound hammer is fixedly installed in the rebound hammer fixing seat; Two jaws of the caliper are respectively hingedly connected with one side of the rebound hammer fixing seat, and the bottom of the rotating shaft of the caliper is provided with a sliding block, and the base is provided with a sliding groove, and the sliding block is slidably arranged in the sliding groove.

2. The core compressive strength testing device of claim 1, wherein: Both sides of the base are provided with first extension plates, the first extension plates are provided with guide rails, and the bottom of the rebound hammer fixing seat is provided with guide grooves in sliding connection with the guide rails.

3. The apparatus of claim 1, wherein: The height of the base is less than 2 / 3 of the diameter of the core, and the depth of the limiting groove is equal to 1 / 2 of the length of the core.

4. The core compressive strength testing device of claim 1, wherein: The end of the base away from the limiting groove is provided with a second extension plate, and the sliding groove is arranged on the second extension plate.

5. The apparatus of claim 1, wherein: The outer wall of the core is polished into four planes in the front, rear, left and right directions, and the core is placed horizontally in the limiting groove.

6. The core compressive strength testing apparatus of claim 5, wherein: The width of the limiting groove is equal to the distance between two opposite planes of the core.

7. The apparatus of claim 1, wherein: The rebound hammer is a mechanical rebound hammer or a digital rebound hammer.

8. The core compressive strength testing device of claim 1, wherein: The rebound hammer fixing seat is composed of a seat body and an end cover, the seat body is provided with a plug hole for inserting the rebound hammer, the top of the tail end of the seat body is provided with an open groove in communication with the plug hole, and the end cover is threadedly connected with the tail end of the seat body for tightly pressing the rebound hammer.

9. The apparatus of any one of claims 1 to 8, wherein: It further comprises a test platform, the base is fixedly installed on the test platform, and the bottom of the test platform is provided with a leveling assembly for adjusting the levelness of the test platform.

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