A rock shear strength testing device

Abstract

This invention relates to the field of shear strength testing and measurement technology for rocks and rock-like materials, and provides a rock shear strength testing device. The device comprises a lower shear mold assembly fixedly installed on the bottom surface of a frame base, with a vertically formed sample loading hole. A connecting slide rail is horizontally positioned and fixedly installed on the lower shear mold assembly. A connecting slider is slidably installed on the connecting slide rail. An upper shear mold clamp is fixedly installed on the connecting slider, with a vertically formed sample loading hole. The fixed end of a horizontal telescopic mechanism is fixedly installed on the side wall of the frame base. One end of a horizontal load sensor abuts against and is fixedly installed on the telescopic end of the horizontal telescopic mechanism. A horizontal push block abuts against and is fixedly installed on the other end of the horizontal load sensor and can push the upper shear mold clamp. This invention eliminates the need for manual adjustment of the shear mold mechanism, allowing the damaged sample to be removed from the bottom of the sample loading hole, making movement and adjustment more convenient, and avoiding safety risks such as mechanical injury.

Description

Technical Field

[0001] This invention relates to the field of shear strength testing and measurement technology for rocks and rock-like materials, and more particularly to a rock shear strength testing device. Background Technology

[0002] Common methods for testing the shear strength of rocks include the inclined die method and the direct shear method. Among them, the direct shear method can apply normal stress and shear stress more flexibly and has a wider range of applications. Traditional rock direct shear tests require manual adjustment of the clamps when disassembling and assembling the specimen. The clamps are solid iron blocks, which are laborious to move and adjust, and also involve safety risks such as mechanical injury.

[0003] In addition, most current direct shear testing machines use an electro-hydraulic servo loading method, which includes a hydraulic oil source, servo valves, and servo actuators. On the one hand, the hydraulic oil source is constantly running during machine operation, resulting in high noise, high power consumption, and severe heat generation. As the operating time increases, the temperature of the hydraulic oil in the hydraulic system continues to rise. Generally, when the oil temperature exceeds 60 degrees Celsius, it will negatively affect the rubber seals in the hydraulic system, causing seal failure and ultimately paralyzing the hydraulic system. Using the traditional hydraulic loading method, the direct shear testing machine can only operate for short periods. On the other hand, hydraulic oil is an essential raw material for the hydraulic system. In actual use, due to pipeline aging and maintenance, interface leakage, and other reasons, hydraulic oil leakage and contamination problems are difficult to avoid. Summary of the Invention

[0004] To address the aforementioned technical problem, a rock shear strength testing device is provided.

[0005] The technical means employed in this invention are as follows:

[0006] A rock shear strength testing device includes a frame base, a shearing mechanism, and a horizontal pushing mechanism. The frame base is U-shaped and vertically arranged. The shearing mechanism includes a lower shearing assembly, a connecting guide rail, and an upper shearing clamp. The lower shearing assembly is fixedly installed on the bottom surface inside the frame base, and a lower sample hole is vertically opened on the lower shearing assembly. The top end of the lower sample hole is open, and the bottom end of the lower sample hole is open or closed. The connecting guide rail includes a connecting slide rail and a connecting slider. The connecting slide rail is horizontally arranged and fixedly installed on the lower shearing assembly, and the connecting slider is slidably installed on the connecting slide rail. The upper shearing clamp is fixedly installed on the connecting slider, and an upper sample hole is vertically opened on the upper shearing clamp. The sample loading hole has openings at both the top and bottom. The upper shearing clamp can move along the connecting slide rail until the bottom of the upper sample loading hole is opposite to the top of the lower sample loading hole. The horizontal pushing mechanism includes a horizontal telescopic mechanism, a horizontal load sensor, and a horizontal push block. The telescopic direction of the horizontal telescopic mechanism is parallel to the length direction of the connecting slide rail. The fixed end of the horizontal telescopic mechanism is fixedly installed on the side wall of the frame base. One end of the horizontal load sensor abuts against and is fixedly installed on the telescopic end of the horizontal telescopic mechanism. The horizontal push block abuts against and is fixedly installed on the end of the horizontal load sensor away from the telescopic end of the horizontal telescopic mechanism. The horizontal push block can push the upper shearing clamp to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism.

[0007] Furthermore, it also includes a vertical clamping mechanism; the vertical clamping mechanism includes a vertical telescopic mechanism, a vertical load sensor, and a vertical pressure block; the telescopic direction of the vertical telescopic mechanism is perpendicular to the horizontal plane, and the fixed end of the vertical telescopic mechanism is fixedly installed on the top wall of the frame base; one end of the vertical load sensor abuts against and is fixedly installed on the telescopic end of the vertical telescopic mechanism; the vertical pressure block abuts against and is fixedly installed on the end of the vertical load sensor away from the telescopic end of the vertical telescopic mechanism, and the vertical pressure block can be opposite to the top of the upper sample loading hole.

[0008] Furthermore, the vertical pressure block includes a pressure block support beam, a follower guide rail, and a pressure block body; the pressure block support beam abuts against and is fixedly installed on the telescopic end of the vertical load sensor away from the vertical telescopic mechanism; the follower guide rail includes a follower slide rail and a follower slider, the length direction of the follower slide rail is parallel to the length direction of the connecting slide rail, the follower slide rail is fixedly installed on the pressure block support beam, and the follower slider is slidably installed on the follower slide rail; the pressure block body is fixedly installed on the follower slider, and the pressure block body can move along the follower slide rail until the pressure block body is opposite to the top of the upper sample hole.

[0009] Furthermore, the vertical pressure block also includes a guide rail; the guide rail includes a guide slide rail and a guide slider, the length direction of the guide slide rail is parallel to the extension direction of the vertical telescopic mechanism, the guide slide rail is fixedly installed on the side of the frame base, and the guide slider is slidably installed on the guide slide rail and fixedly installed on the pressure block support beam.

[0010] Furthermore, the lower shearing die assembly includes a clamping support base, a sample removal guide rail, a lower shearing die clamp, and a reset guide plate; the clamping support base is fixedly installed on the bottom surface within the frame base, and a sample removal groove is vertically formed on the side of the clamping support base, with both the top and bottom ends of the sample removal groove open; the sample removal guide rail includes a sample removal slide rail and a sample removal slider, the length direction of the sample removal slide rail is parallel to the horizontal plane and perpendicular to the length direction of the connecting slide rail, the sample removal slide rail is fixedly installed on the clamping support base, and the sample removal slider is slidably installed on the sample removal slide rail; the lower shearing die clamp is fixedly installed on the sample removal slider, the lower sample loading hole is vertically formed on the lower shearing die clamp, and the connecting slide rail is fixedly installed on the lower shearing die... On the fixture, the lower shearing die fixture can move along the sample unloading slide rail until the bottom end of the lower sample loading hole is opposite to the top end of the sample unloading groove or opposite to the top surface of the fixture support. When the bottom end of the lower sample loading hole is opposite to the top end of the sample unloading groove, the bottom end of the lower sample loading hole is open. When the bottom end of the lower sample loading hole is opposite to the top surface of the fixture support, the bottom end of the lower sample loading hole is closed. The reset guide plate is fixedly installed on the fixture support and can abut against the upper shearing die fixture. During the process of the lower shearing die fixture moving along the sample unloading slide rail until the bottom end of the lower sample loading hole is opposite to the top end of the sample unloading groove, the reset guide plate abuts against the upper shearing die fixture and pushes the upper shearing die fixture to move along the connecting slide rail until the bottom end of the upper sample loading hole is opposite to the top end of the lower sample loading hole.

[0011] Furthermore, it also includes a sample unloading pushing mechanism; the sample unloading pushing mechanism includes a mounting horizontal plate and a sample unloading telescopic mechanism; the mounting horizontal plate is fixedly mounted on the frame base; the telescopic direction of the sample unloading telescopic mechanism is parallel to the length direction of the sample unloading slide rail, the fixed end of the sample unloading telescopic mechanism is fixedly mounted on the mounting horizontal plate, and the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing clamp; the telescopic end of the sample unloading telescopic mechanism can push the lower shearing clamp to move along the sample unloading slide rail until the bottom end of the lower sample loading hole is opposite to the top end of the sample unloading groove.

[0012] Furthermore, the lower shearing die fixture includes a lower die outer mold and a lower die inner mold; the lower die outer mold has a vertically formed lower die inner mold mounting hole; the lower die inner mold is detachably and fitted into the lower die inner mold mounting hole, and the lower sample hole is vertically formed on the lower die inner mold.

[0013] Furthermore, the lower sample loading hole is cylindrical or prismatic.

[0014] Furthermore, the upper shearing fixture includes an upper fixture outer mold and an upper fixture inner mold; the upper fixture outer mold has a vertically formed upper inner mold mounting hole; the upper fixture inner mold is detachably and shape-fittingly installed in the upper inner mold mounting hole, and the upper sample hole is vertically formed on the upper fixture inner mold.

[0015] Furthermore, the sample loading hole is cylindrical or prismatic.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. In this invention, when the bottom end of the lower sample hole is closed and the bottom end of the upper sample hole is opposite to the top end of the lower sample hole, the sample is coaxially installed in the upper and lower sample holes. The telescopic end of the horizontal telescopic mechanism is controlled to drive the horizontal push block to push the upper shearing die fixture until the sample is destroyed. During the above process, the maximum horizontal load on the sample is measured by the horizontal load sensor, and the shear strength of the sample is tested and measured by the maximum horizontal load on the sample. The bottom end of the lower sample hole is then opened and the bottom end of the upper sample hole is opposite to the top end of the lower sample hole. At this time, the destroyed sample can be taken out from the bottom end of the lower sample hole. During the above process, there is no need to manually adjust the shearing die mechanism, making movement and adjustment more convenient, and avoiding safety risks such as mechanical injury.

[0018] 2. In this invention, when the bottom end of the lower sample hole is closed and the bottom end of the upper sample hole is opposite to the top end of the lower sample hole, the sample is coaxially installed in the upper and lower sample holes, and the pressure block body is opposite to the top end of the upper sample hole. A clamping block is placed between the pressure block body and the sample. The telescopic end of the vertical telescopic mechanism is controlled to drive the pressure block body to press the sample and the clamping block. At this time, the telescopic end of the horizontal telescopic mechanism can be controlled to drive the horizontal push block to push the upper shearing die fixture. When the sample is damaged, the sample and the upper shearing die fixture are displaced relative to the lower shearing die assembly. Because the pressure block body presses the sample and the clamping block, under the action of the friction force between the pressure block body and the clamping block and the friction force between the clamping block and the sample, the pressure block body moves along the follower slide rail, so that the pressure block body can always press the sample and the clamping block.

[0019] 3. In this invention, when the sample is damaged, the sample and the upper shearing clamp are displaced relative to the lower shearing assembly. At this time, the telescopic end of the unloading telescopic mechanism pushes the lower shearing clamp along the unloading slide rail until the bottom of the lower sample loading hole is opposite to the top of the unloading groove. During the above process, the reset guide plate will abut against the upper shearing clamp and push the upper shearing clamp along the connecting slide rail until the bottom of the upper sample loading hole is opposite to the top of the lower sample loading hole. When the bottom of the lower sample loading hole is opposite to the top of the unloading groove and the bottom of the upper sample loading hole is opposite to the top of the lower sample loading hole, the damaged sample will move along the upper and lower sample loading holes to the unloading groove. At this time, the damaged sample can be removed from the unloading groove without the need for manual adjustment of the shearing mechanism. The movement and adjustment are more convenient, and safety risks such as mechanical damage can be avoided.

[0020] 4. This invention includes two types of lower clamping inner molds: one type has a cylindrical lower sample hole vertically formed inside, and the other type has a prismatic lower sample hole vertically formed inside. In addition, it includes two types of upper clamping inner molds: one type has a cylindrical upper sample hole vertically formed inside, and the other type has a prismatic upper sample hole vertically formed inside. The cylindrical lower sample hole and the cylindrical upper sample hole cooperate to perform shear strength testing on a cylindrical sample, and the prismatic lower sample hole and the prismatic upper sample hole cooperate to perform shear strength testing on a prismatic sample. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an overall structural diagram of a rock shear strength testing device according to the present invention;

[0023] Figure 2 for Figure 1 A magnified view of point A in the image;

[0024] Figure 3 This is an overall structural diagram of the shearing mechanism in Embodiment 1 of the present invention, where the bottom end of the upper sample loading hole is opposite to the top end of the lower sample loading hole and the bottom end of the lower sample loading hole is opposite to the top end of the sample unloading groove.

[0025] Figure 4 This is an overall structural diagram of the shearing mechanism in Embodiment 1 of the present invention, where the bottom end of the upper sample hole is opposite to the top end of the lower sample hole and the bottom end of the lower sample hole is opposite to the top surface of the fixture support.

[0026] Figure 5 This is an overall structural diagram of the lower shearing die fixture in Embodiment 1 of the present invention;

[0027] Figure 6 This is an overall structural diagram of the upper shearing fixture in Embodiment 1 of the present invention;

[0028] Figure 7 This is an overall structural diagram of the lower shearing die fixture in Embodiment 2 of the present invention;

[0029] Figure 8 This is an overall structural diagram of the upper shearing fixture in Embodiment 2 of the present invention;

[0030] In the diagram: 1-Frame base; 2-Shearing mechanism; 3-Horizontal pushing mechanism; 4-Vertical clamping mechanism; 201-Clamp support seat; 202-Sampling groove; 203-Sampling guide rail; 204-Lower shearing clamp; 205-Connecting guide rail; 206-Upper shearing clamp; 207-Upper loading hole; 208-Sampling servo motor; 209-Sampling reducer; 210-Sampling screw telescopic cylinder; 211-Reset guide plate; 212-Lower loading hole; 2041-Lower clamp outer mold; 2042-Lower clamp inner mold; 2061-Upper clamp outer mold; 2062-Upper clamp inner mold; 301-Horizontal telescopic mechanism; 302-Horizontal load sensor; 303-Horizontal push block; 304-First housing; 3011-Horizontal screw telescopic cylinder; 3012-Horizontal reducer; 3013-Horizontal servo motor; 401-Vertical telescopic mechanism; 402-Vertical load sensor; 403-Vertical pressure block; 404-Second housing; 4011-Vertical reducer; 4012-Vertical servo motor; 4013-Vertical screw telescopic cylinder; 4031-Pressure block support beam; 4032-Guide rail; 4033-Follow-up guide rail; 4034-Pressure block body. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0035] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0036] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0038] Example 1:

[0039] like Figures 1 to 6 As shown, a rock shear strength testing device includes a frame base 1, a shearing mechanism 2, and a horizontal pushing mechanism 3. The frame base 1 is U-shaped and vertically arranged. The shearing mechanism 2 includes a lower shearing assembly, a connecting guide rail 205, and an upper shearing clamp 206. The lower shearing assembly is fixedly installed on the bottom surface inside the frame base 1. A lower sample hole 212 is vertically opened on the lower shearing assembly. The top end of the lower sample hole 212 is open, and the bottom end of the lower sample hole 212 is open or closed. The connecting guide rail 205 includes a connecting slide rail and a connecting slider. The connecting slide rail is horizontally arranged and fixedly installed on the lower shearing assembly. The connecting slider is slidably installed on the connecting slide rail. The upper shearing clamp 206 is fixedly installed on the connecting slider. An upper sample hole 207 is vertically opened on the upper shearing clamp 206. Both the upper and lower ends are open, and the upper shearing clamp 206 can move along the connecting slide rail until the bottom end of the upper sample hole 207 is opposite to the top end of the lower sample hole 212; the horizontal pushing mechanism 3 includes a horizontal telescopic mechanism 301, a horizontal load sensor 302, and a horizontal push block 303; the telescopic direction of the horizontal telescopic mechanism 301 is parallel to the length direction of the connecting slide rail, and the fixed end of the horizontal telescopic mechanism 301 is fixedly installed on the side wall of the frame base 1; one end of the horizontal load sensor 302 abuts against and is fixedly installed on the telescopic end of the horizontal telescopic mechanism 301; the horizontal push block 303 abuts against and is fixedly installed on the end of the horizontal load sensor 302 away from the telescopic end of the horizontal telescopic mechanism 301, and the horizontal push block 303 can push the upper shearing clamp 206 to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism 301.

[0040] Specifically, the horizontal telescopic mechanism 301 is composed of a horizontal servo motor 3013, a horizontal reducer 3012, and a horizontal lead screw telescopic cylinder 3011; the fixed end of the horizontal lead screw telescopic cylinder 3011 is the fixed end of the horizontal telescopic mechanism 301, and the telescopic end of the horizontal lead screw telescopic cylinder 3011 is the telescopic end of the horizontal telescopic mechanism 301.

[0041] This embodiment uses a horizontal servo motor 3013, a horizontal reducer 3012, and a horizontal lead screw telescopic cylinder 3011 to apply rock shear stress, avoiding the sealing failure problem caused by prolonged heating of the hydraulic oil source. When the horizontal servo motor 3013 is working, the output power can be adjusted according to the required shear stress level, which is more energy-efficient and efficient, and can also reduce noise.

[0042] In addition, the horizontal telescopic mechanism 301 is covered with a first outer shell 304.

[0043] In this embodiment, as Figure 1 As shown, it also includes a vertical pressing mechanism 4; the vertical pressing mechanism 4 includes a vertical telescopic mechanism 401, a vertical load sensor 402, and a vertical pressing block 403; the telescopic direction of the vertical telescopic mechanism 401 is perpendicular to the horizontal plane, and the fixed end of the vertical telescopic mechanism 401 is fixedly installed on the top wall of the frame base 1; one end of the vertical load sensor 402 abuts against and is fixedly installed on the telescopic end of the vertical telescopic mechanism 401; the vertical pressing block 403 abuts against and is fixedly installed on the end of the vertical load sensor 402 away from the telescopic end of the vertical telescopic mechanism 401, and the vertical pressing block 403 can be opposite to the top of the upper sample hole 207.

[0044] Specifically, the vertical telescopic mechanism 401 is composed of a vertical servo motor 4012, a vertical reducer 4011, and a vertical lead screw telescopic cylinder 4013; the fixed end of the vertical lead screw telescopic cylinder 4013 is the fixed end of the vertical telescopic mechanism 401, and the telescopic end of the vertical lead screw telescopic cylinder 4013 is the telescopic end of the vertical telescopic mechanism 401.

[0045] This embodiment uses a vertical servo motor 4012, a vertical reducer 4011, and a vertical lead screw telescopic cylinder 4013 to apply normal stress to the rock, avoiding the sealing failure problem caused by prolonged heating of the hydraulic oil source. When the vertical servo motor 4012 is working, the output power can be adjusted according to the required normal stress level, which is more energy-efficient and efficient, and can also reduce noise.

[0046] In addition, the vertical telescopic mechanism 401 is covered with a second outer shell 404.

[0047] In this embodiment, as Figure 2As shown, the vertical pressure block 403 includes a pressure block support beam 4031, a follower rail 4033, and a pressure block body 4034. The pressure block support beam 4031 abuts against and is fixedly installed on the end of the vertical load sensor 402 away from the telescopic end of the vertical telescopic mechanism 401. The follower rail 4033 includes a follower slide rail and a follower slider. The length direction of the follower slide rail is parallel to the length direction of the connecting slide rail. The follower slide rail is fixedly installed on the pressure block support beam 4031, and the follower slider is slidably installed on the follower slide rail. The pressure block body 4034 is fixedly installed on the follower slider. The pressure block body 4034 can move along the follower slide rail until the pressure block body 4034 is opposite to the top of the upper sample hole 207.

[0048] In this embodiment, as Figure 2 As shown, the vertical pressure block 403 also includes a guide rail 4032; the guide rail 4032 includes a guide slide rail and a guide slider. The length direction of the guide slide rail is parallel to the extension direction of the vertical telescopic mechanism 401. The guide slide rail is fixedly installed on the side of the frame base 1. The guide slider is slidably installed on the guide slide rail and fixedly installed on the pressure block support beam 4031.

[0049] In this embodiment, as Figure 3 and Figure 4As shown, the lower shearing die assembly includes a clamp support 201, a sample removal guide rail 203, a lower shearing die clamp 204, and a reset guide plate 211. The clamp support 201 is fixedly installed on the bottom surface of the frame base 1. A sample removal groove 202 is vertically formed on the side of the clamp support 201, and both the top and bottom of the sample removal groove 202 are open. The sample removal guide rail 203 includes a sample removal slide rail and a sample removal slider. The length direction of the sample removal slide rail is parallel to the horizontal plane and perpendicular to the length direction of the connecting slide rail. The sample removal slide rail is fixedly installed on the clamp support 201, and the sample removal slider is slidably installed on the sample removal slide rail. The lower shearing die clamp 204 is fixedly installed on the sample removal slider. A lower sample loading hole 212 is vertically formed on the lower shearing die clamp 204. The connecting slide rail is fixedly installed on the lower shearing die clamp 204. 204 can move along the unloading slide rail until the bottom end of the lower sample loading hole 212 is opposite to the top end of the unloading groove 202 or opposite to the top surface of the clamp support 201. When the bottom end of the lower sample loading hole 212 is opposite to the top end of the unloading groove 202, the bottom end of the lower sample loading hole 212 is open. When the bottom end of the lower sample loading hole 212 is opposite to the top surface of the clamp support 201, the bottom end of the lower sample loading hole 212 is closed. The reset guide plate 211 is fixedly installed on the clamp support 201 and can abut against the upper shearing clamp 206. During the process of the lower shearing clamp 204 moving along the unloading slide rail until the bottom end of the lower sample loading hole 212 is opposite to the top end of the unloading groove 202, the reset guide plate 211 abuts against the upper shearing clamp 206 and pushes the upper shearing clamp 206 to move along the connecting slide rail until the bottom end of the upper sample loading hole 207 is opposite to the top end of the lower sample loading hole 212.

[0050] Specifically, the two sides of the unloading slide rail are V-shaped, and a groove is provided on the bottom surface of the unloading slider. The two sides of the unloading slide rail are respectively attached to the two sides of the groove.

[0051] In addition, the reset guide plate 211 is a right-angled triangle and is horizontally arranged. One right-angled side is parallel to the length direction of the sample unloading slide rail, and the other right-angled side is perpendicular to the length direction of the sample unloading slide rail. The hypotenuse can abut against the upper shearing fixture 206.

[0052] In this embodiment, as Figure 3 and Figure 4 As shown, it also includes a sample unloading pushing mechanism; the sample unloading pushing mechanism includes a mounting horizontal plate and a sample unloading telescopic mechanism; the mounting horizontal plate is fixedly mounted on the frame base 1; the telescopic direction of the sample unloading telescopic mechanism is parallel to the length direction of the sample unloading slide rail, the fixed end of the sample unloading telescopic mechanism is fixedly mounted on the mounting horizontal plate, and the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing clamp 204. The telescopic end of the sample unloading telescopic mechanism can push the lower shearing clamp 204 to move along the sample unloading slide rail until the bottom end of the lower sample loading hole 212 is opposite to the top end of the sample unloading groove 202.

[0053] Specifically, the sample unloading telescopic mechanism consists of a sample unloading servo motor 208, a sample unloading reducer 209, and a sample unloading screw telescopic cylinder 210; the fixed end of the sample unloading screw telescopic cylinder 210 is the fixed end of the sample unloading telescopic mechanism, and the telescopic end of the sample unloading screw telescopic cylinder 210 is the telescopic end of the sample unloading telescopic mechanism.

[0054] In this embodiment, as Figure 5 As shown, the lower shearing die fixture 204 includes a lower outer die 2041 and a lower inner die 2042; the lower outer die 2041 has a lower inner die mounting hole vertically formed on it; the lower inner die 2042 is detachably and shape-fittingly installed in the lower inner die mounting hole, and the lower sample hole 212 is vertically formed on the lower inner die 2042.

[0055] In this embodiment, the lower sample loading hole 212 is cylindrical.

[0056] Specifically, the radius of the horizontal cross-section of the lower sample hole 212 is 25 mm.

[0057] In this embodiment, as Figure 6 As shown, the upper shearing fixture 206 includes an upper fixture outer mold 2061 and an upper fixture inner mold 2062; the upper fixture outer mold 2061 has a vertically formed upper inner mold mounting hole; the upper fixture inner mold 2062 is detachably and shape-fittingly installed in the upper inner mold mounting hole, and the upper sample hole 207 is vertically formed on the upper fixture inner mold 2062.

[0058] In this embodiment, the upper sample hole 207 is cylindrical.

[0059] Specifically, the radius of the horizontal cross-section of the upper sample hole 207 is 25 mm.

[0060] The working principle of this embodiment:

[0061] Step 1: Install the sample; make the bottom end of the upper sample hole 207 face the top end of the lower sample hole 212 and the bottom end of the lower sample hole 212 face the top surface of the fixture support 201, and coaxially install the sample with a radius of 25 mm and a height of 100 mm in the upper sample hole 207 and the lower sample hole 212.

[0062] Step 2: Pressing the sample: Position the pressing block body 4034 opposite the top of the upper sample loading hole 207, and place the pressing block between the pressing block body 4034 and the sample. Control the extension end of the vertical telescopic mechanism 401 to drive the pressing block body 4034 to press the sample and the pressing block. The vertical load on the sample can be measured by the vertical load sensor 402. As the pressing block body 4034 presses the sample and the pressing block, under the action of the friction force between the pressing block body 4034 and the pressing block and the friction force between the pressing block and the sample, the pressing block body 4034 moves along the follower slide rail, so that the pressing block body 4034 can always press the sample and the pressing block.

[0063] Step 3: Test the shear strength of the specimen: Control the extension end of the horizontal telescopic mechanism 301 to drive the horizontal push block 303 to push the upper shearing die clamp 206 until the specimen is destroyed. During the above process, the maximum horizontal load on the specimen is measured by the horizontal load sensor 302. The shear strength of the specimen is tested and measured by the maximum horizontal load on the specimen.

[0064] Step 4: Remove the sample; control the telescopic end of the sample unloading telescopic mechanism to push the lower shearing clamp 204 along the sample unloading slide rail until the bottom end of the lower sample loading hole 212 is opposite to the top end of the sample unloading groove 202. During the above process, the reset guide plate 211 will abut against the upper shearing clamp 206 and push the upper shearing clamp 206 along the connecting slide rail until the bottom end of the upper sample loading hole 207 is opposite to the top end of the lower sample loading hole 212. When the bottom end of the lower sample loading hole 212 is opposite to the top end of the sample unloading groove 202 and the bottom end of the upper sample loading hole 207 is opposite to the top end of the lower sample loading hole 212, the damaged sample will move along the upper sample loading hole 207 and the lower sample loading hole 212 to the sample unloading groove 202. At this time, the damaged sample can be removed from the sample unloading groove 202.

[0065] Example 2:

[0066] like Figure 7 As shown, in this embodiment, the lower sample loading hole 212 is prismatic.

[0067] Specifically, the horizontal cross-section of the lower sample hole 212 is square, with a side length of 50 mm.

[0068] like Figure 8 As shown, in this embodiment, the upper sample loading hole 207 is prismatic.

[0069] Specifically, the horizontal cross-section of the upper sample hole 207 is square, with a side length of 50 mm.

[0070] In addition, in this embodiment, a 50*50*100 mm sample is coaxially installed in the upper sample loading hole 207 and the lower sample loading hole 212.

[0071] The rest is the same as in Example 1.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rock shear strength testing device, characterized in that, It includes a frame base (1), a shearing mechanism (2), and a horizontal pushing mechanism (3); The frame base (1) is shaped like a square and is set vertically; The shearing mechanism (2) includes a lower shearing assembly, a connecting guide rail (205), and an upper shearing fixture (206). The lower shearing assembly is fixedly installed on the bottom surface of the frame base (1). A lower sample hole (212) is vertically opened on the lower shearing assembly. The top end of the lower sample hole (212) is open, and the bottom end of the lower sample hole (212) is open or closed. The connecting guide rail (205) includes a connecting slide rail and a connecting slider. The connecting slide rail is horizontally set and fixedly installed on the lower shearing assembly. The connecting slider is slidably installed on the connecting slide rail. The upper shearing fixture (206) is fixedly installed on the connecting slider. An upper sample hole (207) is vertically opened on the upper shearing fixture (206). The top and bottom ends of the upper sample hole (207) are both open. The upper shearing fixture (206) can move along the connecting slide rail until the bottom end of the upper sample hole (207) is opposite to the top end of the lower sample hole (212). The horizontal pushing mechanism (3) includes a horizontal telescopic mechanism (301), a horizontal load sensor (302), and a horizontal push block (303); the telescopic direction of the horizontal telescopic mechanism (301) is parallel to the length direction of the connecting slide rail, and the fixed end of the horizontal telescopic mechanism (301) is fixedly installed on the side wall of the frame base (1); one end of the horizontal load sensor (302) abuts against and is fixedly installed on the telescopic end of the horizontal telescopic mechanism (301); the horizontal push block (303) abuts against and is fixedly installed on the end of the horizontal load sensor (302) away from the telescopic end of the horizontal telescopic mechanism (301), and the horizontal push block (303) can push the upper shearing fixture (206) to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism (301); The lower shearing die assembly includes a clamp support base (201), a sample removal guide rail (203), a lower shearing die clamp (204), and a reset guide plate (211). The clamp support base (201) is fixedly installed on the bottom surface inside the frame base (1). A sample unloading groove (202) is vertically opened on the side of the clamp support base (201). The top and bottom of the sample unloading groove (202) are both open. The sample unloading guide rail (203) includes a sample unloading slide rail and a sample unloading slider. The length direction of the sample unloading slide rail is parallel to the horizontal plane and perpendicular to the length direction of the connecting slide rail. The sample unloading slide rail is fixedly installed on the clamp support base (201), and the sample unloading slider is slidably installed on the sample unloading slide rail. The lower shearing die clamp (204) is fixedly installed on the sample removal slider. The lower sample loading hole (212) is vertically opened on the lower shearing die clamp (204). The connecting slide rail is fixedly installed on the lower shearing die clamp (204). The lower shearing die clamp (204) can move along the sample removal slide rail until the bottom end of the lower sample loading hole (212) is opposite to the top end of the sample removal groove (202) or opposite to the top surface of the clamp support (201). When the bottom end of the lower sample loading hole (212) is opposite to the top end of the sample removal groove (202), the bottom end of the lower sample loading hole (212) is open. When the bottom end of the lower sample loading hole (212) is opposite to the top surface of the clamp support (201), the bottom end of the lower sample loading hole (212) is closed. The reset guide plate (211) is fixedly installed on the fixture support base (201) and can abut against the upper shearing fixture (206). During the process of the lower shearing fixture (204) moving along the sample unloading slide rail until the bottom end of the lower sample loading hole (212) is opposite to the top end of the sample unloading groove (202), the reset guide plate (211) abuts against the upper shearing fixture (206) and pushes the upper shearing fixture (206) to move along the connecting slide rail until the bottom end of the upper sample loading hole (207) is opposite to the top end of the lower sample loading hole (212).

2. The rock shear strength testing device according to claim 1, characterized in that, It also includes a vertical clamping mechanism (4); The vertical pressing mechanism (4) includes a vertical telescopic mechanism (401), a vertical load sensor (402), and a vertical pressing block (403); the telescopic direction of the vertical telescopic mechanism (401) is perpendicular to the horizontal plane, and the fixed end of the vertical telescopic mechanism (401) is fixedly installed on the top wall of the frame base (1); one end of the vertical load sensor (402) abuts against and is fixedly installed on the telescopic end of the vertical telescopic mechanism (401); the vertical pressing block (403) abuts against and is fixedly installed on the end of the vertical load sensor (402) away from the telescopic end of the vertical telescopic mechanism (401), and the vertical pressing block (403) can be opposite to the top of the upper sample hole (207).

3. The rock shear strength testing device according to claim 2, characterized in that, The vertical pressure block (403) includes a pressure block support beam (4031), a follower guide rail (4033), and a pressure block body (4034). The pressure block support beam (4031) abuts against and is fixedly installed on one end of the vertical load sensor (402) away from the telescopic end of the vertical telescopic mechanism (401); The follower guide rail (4033) includes a follower slide rail and a follower slider. The length direction of the follower slide rail is parallel to the length direction of the connecting slide rail. The follower slide rail is fixedly installed on the pressure block support beam (4031), and the follower slider is slidably installed on the follower slide rail. The pressure block body (4034) is fixedly installed on the follower slider. The pressure block body (4034) can move along the follower slide rail until the pressure block body (4034) is opposite to the top of the upper sample hole (207).

4. The rock shear strength testing device according to claim 3, characterized in that, The vertical pressure block (403) also includes a guide rail (4032); The guide rail (4032) includes a guide slide rail and a guide slider. The length direction of the guide slide rail is parallel to the extension direction of the vertical telescopic mechanism (401). The guide slide rail is fixedly installed on the side of the frame base (1). The guide slider is slidably installed on the guide slide rail and fixedly installed on the pressure block support beam (4031).

5. The rock shear strength testing device according to claim 1, characterized in that, It also includes a sample unloading mechanism; The sample unloading pushing mechanism includes a mounting plate and a sample unloading telescopic mechanism; the mounting plate is fixedly mounted on the frame base (1); the telescopic direction of the sample unloading telescopic mechanism is parallel to the length direction of the sample unloading slide rail, the fixed end of the sample unloading telescopic mechanism is fixedly mounted on the mounting plate, and the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing clamp (204). The telescopic end of the sample unloading telescopic mechanism can push the lower shearing clamp (204) to move along the sample unloading slide rail until the bottom end of the lower sample loading hole (212) is opposite to the top end of the sample unloading groove (202).

6. The rock shear strength testing device according to claim 1, characterized in that, The lower shearing die fixture (204) includes a lower die outer mold (2041) and a lower die inner mold (2042). The lower clamp outer mold (2041) has a vertically formed lower inner mold mounting hole; The lower fixture inner mold (2042) is detachably and shape-fittingly installed in the lower inner mold mounting hole, and the lower sample hole (212) is vertically opened on the lower fixture inner mold (2042).

7. A rock shear strength testing device according to claim 6, characterized in that, The lower sample loading hole (212) is cylindrical or prismatic.

8. A rock shear strength testing device according to claim 1, characterized in that, The upper shearing fixture (206) includes an upper fixture outer mold (2061) and an upper fixture inner mold (2062). The upper clamp outer mold (2061) is vertically provided with an upper inner mold mounting hole; The upper clamp inner mold (2062) is detachably and shape-fittingly installed in the upper inner mold mounting hole, and the upper sample hole (207) is vertically opened on the upper clamp inner mold (2062).

9. A rock shear strength testing device according to claim 8, characterized in that, The sample loading hole (207) is cylindrical or prismatic.

Images