Rock shear strength testing device

Abstract

The invention relates to the technical field of rock and rock-like material shear strength testing and metering, and provides a rock shear strength testing device.A lower shear die assembly is fixedly installed on the bottom face in a frame base, a lower sample loading hole is vertically formed in the lower shear die assembly, a connecting sliding rail is horizontally arranged and fixedly installed on the lower shear die assembly, and a lower sample loading hole is vertically formed in the lower sample loading hole; the connecting sliding block is installed on the connecting sliding rail in a sliding mode, the upper shear mold clamp is fixedly installed on the connecting sliding block, an upper sample loading hole is vertically formed in the upper shear mold clamp, the fixed end of the horizontal telescopic mechanism is fixedly installed on the side wall of the frame base, and one end of the horizontal load sensor abuts against and is fixedly installed at the telescopic end of the horizontal telescopic mechanism. The horizontal push block abuts against and is fixedly installed at the other end of the horizontal load sensor and can push the upper shear die clamp. According to the invention, a damaged sample can be taken out from the bottom end of the lower sample loading hole without manually adjusting the shear die mechanism, the movement and adjustment are more convenient, and safety risks such as mechanical injury can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of shear strength testing and measurement of rocks and rock-like materials, and in particular to a rock shear strength testing device. Background Art

[0002] Common methods for testing rock shear strength include the inclined compression die method and the direct shear method. The direct shear method offers greater flexibility in applying normal and shear stresses and is therefore more widely used. Traditional rock direct shear testing requires manual adjustment of the fixture during specimen assembly and disassembly. These solid iron fixtures are laborious to move and adjust, and carry 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 valve, and servo actuator. On the one hand, the hydraulic oil source is always in operation during testing, resulting in high noise, high power consumption, and severe heat generation. As operating time increases, the hydraulic oil temperature 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, in turn, paralysis of the hydraulic system. Using traditional hydraulic loading methods, the direct shear testing machine can only operate for short periods of time. On the other hand, hydraulic oil is an essential raw material for hydraulic systems. In actual use, hydraulic oil leakage and contamination are difficult to avoid due to pipeline aging and maintenance, interface leakage, and other reasons. Summary of the Invention

[0004] In response to the above-mentioned technical problems, a rock shear strength testing device is provided.

[0005] The technical means adopted in the present invention are as follows: A rock shear strength testing device comprises a frame base, a shearing die mechanism and a horizontal pushing mechanism; the frame base is in a U-shape and is vertically arranged; the shearing die mechanism comprises a lower shearing die assembly, a connecting guide rail and an upper shearing die clamp; the lower shearing die assembly is fixedly mounted on the bottom surface of the frame base, a lower sample loading hole is vertically opened on the lower shearing die assembly, the top end of the lower sample loading hole is open, and the bottom end of the lower sample loading hole is open or closed; the connecting guide rail comprises a connecting slide rail and a connecting slider, the connecting slide rail is horizontally arranged and fixedly mounted on the lower shearing die assembly, the connecting slider is slidably mounted on the connecting slide rail; the upper shearing die clamp is fixedly mounted on the connecting slider, the upper sample loading hole is vertically opened on the upper shearing die clamp, and the upper sample loading hole is vertically opened on the upper The top and bottom ends of the sample loading hole are both open, and the upper shearing die fixture can be moved 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; 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, and 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 and is fixedly installed on the telescopic end of the horizontal telescopic mechanism; the horizontal push block abuts and is fixedly installed on the end of the horizontal load sensor away from the telescopic end of the horizontal telescopic mechanism, and the horizontal push block can push the upper shearing die fixture to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism.

[0006] 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 mounted on the top wall of the frame base; one end of the vertical load sensor abuts and is fixedly mounted on the telescopic end of the vertical telescopic mechanism; the vertical pressure block abuts and is fixedly mounted 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 hole.

[0007] Furthermore, the vertical pressure block includes a pressure block supporting beam, a follower guide rail and a pressure block body; the pressure block supporting beam abuts and is fixedly mounted on one end of the vertical load sensor away from the telescopic end of 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 mounted on the pressure block supporting beam, and the follower slider is slidably mounted on the follower slide rail; the pressure block body is fixedly mounted 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.

[0008] 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 telescopic direction of the vertical telescopic mechanism, the guide slide rail is fixedly installed on the side surface inside the frame base, and the guide slider is slidably installed on the guide slide rail and fixedly installed on the pressure block support beam.

[0009] Furthermore, the lower shearing die assembly includes a clamp support seat, a sample unloading guide rail, a lower shearing die clamp and a reset guide plate; the clamp support seat is fixedly mounted on the bottom surface of the frame base, and a sample unloading groove is vertically opened on the side surface of the clamp support seat, and the top and bottom ends of the sample unloading groove are both open; the sample unloading guide rail 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 mounted on the clamp support seat, and the sample unloading slider is slidably mounted on the sample unloading slide rail; the lower shearing die clamp is fixedly mounted on the sample unloading slider, the lower loading hole is vertically opened on the lower shearing die clamp, and the connecting slide rail is fixedly mounted 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 seat. 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, and when the bottom end of the lower sample loading hole is opposite to the top surface of the fixture support seat, the bottom end of the lower sample loading hole is closed; the reset guide plate is fixedly mounted on the fixture support seat and can abut against the upper shearing die fixture. In 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.

[0010] Furthermore, it also includes a sample unloading pushing mechanism; the sample unloading pushing mechanism includes a mounting cross plate and a sample unloading telescopic mechanism; the mounting cross 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 cross plate, the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing mold clamp, and the telescopic end of the sample unloading telescopic mechanism can push the lower shearing mold clamp to move along the sample unloading slide rail until the bottom end of the lower loading hole is opposite to the top end of the sample unloading groove.

[0011] Furthermore, the lower shear mold fixture includes a lower fixture outer mold and a lower fixture inner mold; a lower inner mold mounting hole is vertically opened on the lower fixture outer mold; the lower fixture inner mold is detachable and shape-fittingly installed in the lower inner mold mounting hole, and the lower loading hole is vertically opened on the lower fixture inner mold.

[0012] Furthermore, the lower sample loading hole is cylindrical or prismatic.

[0013] Furthermore, the upper shear mold fixture includes an upper fixture outer mold and an upper fixture inner mold; an upper inner mold mounting hole is vertically opened on the upper fixture outer mold; the upper fixture inner mold is detachable and shape-fittingly installed in the upper inner mold mounting hole, and the upper loading hole is vertically opened on the upper fixture inner mold.

[0014] Furthermore, the upper sample loading hole is cylindrical or prismatic.

[0015] Compared with the prior art, the present invention has the following advantages: 1. In the present invention, when the bottom end of the lower sample loading hole is closed and the bottom end of the upper sample loading hole is opposite to the top end of the lower sample loading hole, the sample is coaxially installed in the upper sample loading hole and the lower sample loading hole, and the telescopic end of the horizontal telescopic mechanism is controlled to drive the horizontal push block to push the upper shear die clamp until the sample is destroyed. In the above process, the maximum horizontal load applied to 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 applied to the sample; the bottom end of the lower sample loading hole is opened and the bottom end of the upper sample loading hole is opposite to the top end of the lower sample loading hole. At this time, the destroyed sample can be taken out from the bottom end of the lower sample loading hole. In the above process, there is no need to manually adjust the shear die mechanism, the movement and adjustment are more convenient, and safety risks such as mechanical injury can be avoided.

[0016] 2. In the present invention, when the bottom end of the lower sample loading hole is closed and the bottom end of the upper sample loading hole is opposite to the top end of the lower sample loading hole, the sample is coaxially installed in the upper sample loading hole and the lower sample loading hole, so that the pressure block body is opposite to the top end of the upper sample loading hole, and 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 clamp 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 shear die fixture. When the sample is destroyed, the sample and the upper shear die fixture are displaced relative to the lower shear die assembly. Since the pressure block body presses the sample and the clamping block, under the action of the friction between the pressure block body and the clamping block and the friction between the clamping block and the sample, the pressure block body moves along the follow-up slide rail, so that the pressure block body can always clamp the sample and the clamping block.

[0017] 3. In the present invention, when the sample is damaged, the sample and the upper shearing die clamp are displaced relative to the lower shearing die assembly. At this time, the telescopic end of the telescopic mechanism for controlling the sample unloading pushes the lower shearing die clamp to move along the sample unloading slide rail until the bottom end of the lower loading hole is opposite to the top end of the sample unloading groove. In the above process, the reset guide plate will abut against the upper shearing die clamp and push the upper shearing die clamp to move along the connecting slide rail until the bottom end of the upper loading hole is opposite to the top end of the lower loading hole. When the bottom end of the lower loading hole is opposite to the top end of the sample unloading groove and the bottom end of the upper loading hole is opposite to the top end of the lower loading hole, the damaged sample will move along the upper loading hole and the lower loading hole to the sample unloading groove. At this time, the damaged sample can be taken out from the sample unloading groove without manual adjustment of the shearing die mechanism. The movement and adjustment are more convenient, and safety risks such as mechanical injury can be avoided.

[0018] 4. The present invention includes two types of lower clamp inner molds, one of which has a cylindrical lower sample hole vertically opened in the lower clamp inner mold, and the other of which has a prismatic lower sample hole vertically opened in the lower clamp inner mold; in addition, it also includes two types of upper clamp inner molds, one of which has a cylindrical upper sample hole vertically opened in the upper clamp inner mold, and the other of which has a prismatic upper sample hole vertically opened in the upper clamp inner mold; the cylindrical lower sample hole cooperates with the cylindrical upper sample hole to perform shear strength test on cylindrical specimens, and the prismatic lower sample hole cooperates with the prismatic upper sample hole to perform shear strength test on prismatic specimens. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 This is an overall structural diagram of a rock shear strength testing device according to the present invention; Figure 2 for Figure 1 A local enlarged view of point A in FIG; Figure 3 This is an overall structural diagram of the shearing die mechanism in Example 1 of the present invention when 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; Figure 4 This is an overall structural diagram of the die shearing mechanism in Example 1 of the present invention when 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 surface of the clamp support seat; Figure 5 1 is an overall structural diagram of the lower shearing die fixture in Example 1 of the present invention; Figure 6 1 is an overall structural diagram of the upper shearing die fixture in Example 1 of the present invention; Figure 7 2 is an overall structural diagram of the lower shearing die fixture in Example 2 of the present invention; Figure 8 2 is an overall structural diagram of the upper shearing die fixture in Example 2 of the present invention; In the figure: 1-frame base; 2-die shearing mechanism; 3-horizontal pushing mechanism; 4-vertical pressing mechanism; 201-clamp support seat; 202-sample unloading groove; 203-sample unloading guide rail; 204-lower die shearing fixture; 205-connecting guide rail; 206-upper die shearing fixture; 207-upper sample loading hole; 208-sample unloading servo motor; 209-sample unloading reducer; 210-sample unloading screw rod telescopic cylinder; 211-reset guide plate; 212-lower sample loading hole; 2041-lower fixture outer mold; 2042-lower fixture inner mold; 2061-upper fixture outer mold; 2062-upper fixture 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 rail; 4034-pressure block body. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0025] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0026] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "above" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0027] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0028] Example 1: like Figures 1 to 6 As shown, a rock shear strength testing device includes a frame base 1, a shearing die mechanism 2 and a horizontal pushing mechanism 3; the frame base 1 is in a U-shape and is vertically arranged; the shearing die mechanism 2 includes a lower shearing die assembly, a connecting guide rail 205 and an upper shearing die clamp 206; the lower shearing die assembly is fixedly mounted on the bottom surface of the frame base 1, and a lower sample loading hole 212 is vertically opened on the lower shearing die assembly, the top end of the lower sample loading hole 212 is open, and the bottom end of the lower sample loading 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 mounted on the lower shearing die assembly, and the connecting slider is slidably mounted on the connecting slide rail; the upper shearing die clamp 206 is fixedly mounted on the connecting slider, and an upper sample loading hole 207 is vertically opened on the upper shearing die clamp 206, and the top end of the upper sample loading hole 207 and bottom ends are open, and the upper shearing die fixture 206 can 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; 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 mounted on the side wall of the frame base 1; one end of the horizontal load sensor 302 is abutted and fixedly mounted on the telescopic end of the horizontal telescopic mechanism 301; the horizontal push block 303 is abutted and fixedly mounted 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 die fixture 206 to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism 301.

[0029] Specifically, the horizontal telescopic mechanism 301 is composed of a horizontal servo motor 3013, a horizontal reducer 3012 and a horizontal screw telescopic cylinder 3011; the fixed end of the horizontal screw telescopic cylinder 3011 is the fixed end of the horizontal telescopic mechanism 301, and the telescopic end of the horizontal screw telescopic cylinder 3011 is the telescopic end of the horizontal telescopic mechanism 301.

[0030] This embodiment uses a horizontal servo motor 3013, a horizontal reducer 3012 and a horizontal screw telescopic cylinder 3011 to achieve rock shear stress application, avoiding the problem of sealing failure caused by long-term 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-saving and efficient, and can also reduce noise.

[0031] In addition, the horizontal telescopic mechanism 301 is provided with a first shell 304 .

[0032] In this embodiment, Figure 1As shown, it also includes a vertical clamping mechanism 4; the vertical clamping mechanism 4 includes a vertical telescopic mechanism 401, a vertical load sensor 402 and a vertical pressure 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 mounted on the top wall of the frame base 1; one end of the vertical load sensor 402 abuts and is fixedly mounted on the telescopic end of the vertical telescopic mechanism 401; the vertical pressure block 403 abuts and is fixedly mounted on the end of the vertical load sensor 402 away from the telescopic end of the vertical telescopic mechanism 401, and the vertical pressure block 403 can be opposite to the top of the upper sample hole 207.

[0033] Specifically, the vertical telescopic mechanism 401 is composed of a vertical servo motor 4012, a vertical reducer 4011 and a vertical screw telescopic cylinder 4013; the fixed end of the vertical screw telescopic cylinder 4013 is the fixed end of the vertical telescopic mechanism 401, and the telescopic end of the vertical screw telescopic cylinder 4013 is the telescopic end of the vertical telescopic mechanism 401.

[0034] This embodiment uses a vertical servo motor 4012, a vertical reducer 4011 and a vertical screw telescopic cylinder 4013 to achieve the application of positive stress on the rock, avoiding the problem of sealing failure caused by long-term heating of the hydraulic oil source. When the vertical servo motor 4012 is working, the output power can be adjusted according to the required positive stress level, which is more energy-saving and efficient, and can also reduce noise.

[0035] In addition, the vertical telescopic mechanism 401 is provided with a second shell 404 .

[0036] In this embodiment, Figure 2 As shown, the vertical pressure block 403 includes a pressure block supporting beam 4031, a follower guide rail 4033 and a pressure block body 4034; the pressure block supporting beam 4031 is abutted and fixedly mounted on the 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 mounted on the pressure block supporting beam 4031, and the follower slider is slidably mounted on the follower slide rail; the pressure block body 4034 is fixedly mounted on the follower slider, and 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 loading hole 207.

[0037] In this embodiment, Figure 2As 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 telescopic direction of the vertical telescopic mechanism 401, the guide slide rail is fixedly installed on the side surface inside the frame base 1, and the guide slider is slidably installed on the guide slide rail and fixedly installed on the pressure block support beam 4031.

[0038] In this embodiment, Figure 3 and Figure 4 As shown, the lower shearing die assembly includes a clamp support seat 201, a sample unloading guide rail 203, a lower shearing die clamp 204 and a reset guide plate 211; the clamp support seat 201 is fixedly mounted on the bottom surface of the frame base 1, and a sample unloading groove 202 is vertically opened on the side of the clamp support seat 201, and the top and bottom ends 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 mounted on the clamp support seat 201, and the sample unloading slider is slidably mounted on the sample unloading slide rail; the lower shearing die clamp 204 is fixedly mounted on the sample unloading slider, the lower loading hole 212 is vertically opened on the lower shearing die clamp 204, the connecting slide rail is fixedly mounted on the lower shearing die clamp 204, and the lower shearing die clamp When the bottom end of the lower sample hole 212 is opposite to the top of the sample unloading groove 202, the reset guide plate 211 abuts against the upper shearing mold clamp 206 and pushes the upper shearing mold clamp 206 to move along the connecting slide rail until the bottom end of the upper sample hole 207 is opposite to the top of the lower sample hole 212.

[0039] Specifically, the two sides of the sample unloading slide rail are V-shaped, a slide groove is provided on the bottom surface of the sample unloading slider, and the two sides of the sample unloading slide rail are respectively fitted with the two sides of the slide groove.

[0040] In addition, the reset guide plate 211 is in the shape of a right triangle and is arranged horizontally, wherein one right-angled side is parallel to the length direction of the unloading slide rail, and the other right-angled side is perpendicular to the length direction of the unloading slide rail, and the hypotenuse can abut against the upper shear mold clamp 206.

[0041] In this embodiment, Figure 3 and Figure 4As shown, it also includes a sample unloading pushing mechanism; the sample unloading pushing mechanism includes a mounting cross plate and a sample unloading telescopic mechanism; the mounting cross 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, and the fixed end of the sample unloading telescopic mechanism is fixedly mounted on the mounting cross plate, and the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing mold clamp 204, and the telescopic end of the sample unloading telescopic mechanism can push the lower shearing mold clamp 204 to move along the sample unloading slide rail until the bottom end of the lower loading hole 212 is opposite to the top end of the sample unloading groove 202.

[0042] Specifically, the sample unloading telescopic mechanism is composed 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.

[0043] In this embodiment, Figure 5 As shown, the lower shear mold fixture 204 includes a lower fixture outer mold 2041 and a lower fixture inner mold 2042; a lower inner mold mounting hole is vertically opened on the lower fixture outer mold 2041; the lower fixture inner mold 2042 is detachable and shape-fittingly installed in the lower inner mold mounting hole, and the lower loading hole 212 is vertically opened on the lower fixture inner mold 2042.

[0044] In this embodiment, the lower sample loading hole 212 is cylindrical.

[0045] Specifically, the radius of the horizontal cross section of the lower sample loading hole 212 is 25 mm.

[0046] In this embodiment, Figure 6 As shown, the upper shear mold fixture 206 includes an upper fixture outer mold 2061 and an upper fixture inner mold 2062; an upper inner mold mounting hole is vertically opened on the upper fixture outer mold 2061; the upper fixture inner mold 2062 is detachable and shape-fittingly installed in the upper inner mold mounting hole, and the upper loading hole 207 is vertically opened on the upper fixture inner mold 2062.

[0047] In this embodiment, the upper sample loading hole 207 is cylindrical.

[0048] Specifically, the radius of the horizontal cross section of the upper sample loading hole 207 is 25 mm.

[0049] The working principle of this embodiment is as follows: Step 1: Install the sample; align the bottom of the upper sample hole 207 with the top of the lower sample hole 212 and the bottom of the lower sample hole 212 with the top surface of the fixture support 201. Install the sample with a radius of 25 mm and a height of 100 mm coaxially in the upper sample hole 207 and the lower sample hole 212. Step 2: Compressing the sample: The pressure block body 4034 is aligned with the top of the upper sample loading hole 207, and a compression block is placed between the pressure block body 4034 and the sample. The expansion and contraction end of the vertical expansion and contraction mechanism 401 is controlled to drive the pressure block body 4034 to compress the sample and the compression block. The vertical load sensor 402 measures the vertical load on the sample. As the pressure block body 4034 compresses the sample and the compression block, the friction between the pressure block body 4034 and the compression block, and between the compression block and the sample, causes the pressure block body 4034 to move along the follower rail, ensuring that the pressure block body 4034 can always compress the sample and the compression block. Step 3: Testing the shear strength of the sample: Control the telescopic end of the horizontal telescopic mechanism 301 to drive the horizontal push block 303 to push the upper shear die fixture 206 until the sample is broken. During the above process, the horizontal load sensor 302 measures the maximum horizontal load on the sample. The maximum horizontal load on the sample is used to test and measure the shear strength of the sample. Step 4: Take out the sample; control the telescopic end of the sample unloading telescopic mechanism to push the lower shearing die 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 of the sample unloading groove 202. During the above process, the reset guide plate 211 will abut against the upper shearing die clamp 206 and push the upper shearing die 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 of the lower sample loading hole 212. When the bottom end of the lower sample loading hole 212 is opposite to the top of the sample unloading groove 202 and the bottom end of the upper sample loading hole 207 is opposite to the top 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 taken out of the sample unloading groove 202.

[0050] Example 2: like Figure 7 As shown, in this embodiment, the lower sample loading hole 212 is prismatic.

[0051] Specifically, the horizontal cross-section of the lower sample loading hole 212 is a square with a side length of 50 mm.

[0052] like Figure 8 As shown, in this embodiment, the upper sample hole 207 is prismatic.

[0053] Specifically, the horizontal cross-section of the upper sample loading hole 207 is a square with a side length of 50 mm.

[0054] In addition, in this embodiment, a sample of 50*50*100 mm is coaxially installed in the upper sample loading hole 207 and the lower sample loading hole 212.

[0055] The rest is the same as Example 1.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 comprises a frame base (1), a die shearing mechanism (2) and a horizontal pushing mechanism (3); The frame base (1) is in a U-shaped shape and is arranged vertically; The shearing die mechanism (2) comprises a lower shearing die assembly, a connecting guide rail (205) and an upper shearing die fixture (206); the lower shearing die assembly is fixedly mounted on the bottom surface of the frame base (1); a lower sample loading hole (212) is vertically opened on the lower shearing die assembly, the top end of the lower sample loading hole (212) is open, and the bottom end of the lower sample loading hole (212) is open or closed; the connecting guide rail (205) comprises a connecting slide rail and a connecting slider, the connecting slide rail is horizontally arranged and fixedly mounted on the lower shearing die assembly, and the connecting slider is slidably mounted on the connecting slide rail; the upper shearing die fixture (206) is fixedly mounted on the connecting slider, an upper sample loading hole (207) is vertically opened on the upper shearing die fixture (206), the top and bottom ends of the upper sample loading hole (207) are both open, and the upper shearing die fixture (206) can 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); The horizontal pushing mechanism (3) comprises 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 mounted on the side wall of the frame base (1); one end of the horizontal load sensor (302) abuts against and is fixedly mounted on the telescopic end of the horizontal telescopic mechanism (301); the horizontal push block (303) abuts against and is fixedly mounted 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 shear mold clamp (206) to move along the connecting slide rail under the drive of the telescopic end of the horizontal telescopic mechanism (301).

2. A rock shear strength testing device according to claim 1, characterized in that: Also includes a vertical pressing mechanism (4); The vertical pressing mechanism (4) comprises 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 mounted on the top wall of the frame base (1); one end of the vertical load sensor (402) abuts against and is fixedly mounted on the telescopic end of the vertical telescopic mechanism (401); the vertical pressing block (403) abuts against and is fixedly mounted 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 end of the upper sample loading hole (207).

3. A rock shear strength testing device according to claim 2, characterized in that: The vertical pressing block (403) comprises a pressing block supporting beam (4031), a follower guide rail (4033) and a pressing block body (4034); The pressure block supporting beam (4031) is abutted against and fixedly mounted on an end of the vertical load sensor (402) away from the telescopic end of the vertical telescopic mechanism (401); The follower guide rail (4033) comprises 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 mounted on the pressure block support beam (4031), and the follower slider is slidably mounted on the follower slide rail; The pressing block body (4034) is fixedly mounted on the follower slide, and the pressing block body (4034) can move along the follower slide until the pressing block body (4034) is opposite to the top end of the upper sample loading hole (207).

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

5. A rock shear strength testing device according to claim 1, characterized in that: The lower shearing die assembly comprises a fixture support seat (201), a sample unloading guide rail (203), a lower shearing die fixture (204) and a reset guide plate (211); The clamp support seat (201) is fixedly mounted on the bottom surface of the frame base (1), and a sample unloading groove (202) is vertically opened on the side surface of the clamp support seat (201), and the top and bottom ends of the sample unloading groove (202) are both open; The sample unloading guide rail (203) comprises 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 mounted on the fixture support seat (201), and the sample unloading slider is slidably mounted on the sample unloading slide rail. The lower shearing die fixture (204) is fixedly mounted on the sample unloading slide, the lower sample loading hole (212) is vertically opened on the lower shearing die fixture (204), the connecting slide rail is fixedly mounted on the lower shearing die fixture (204), and the lower shearing die fixture (204) can be moved 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) or opposite to the top surface of the fixture support seat (201), when the bottom end of the lower sample loading hole (212) is opposite to the top end of the sample unloading groove (202), the bottom end of the lower sample loading hole (212) is open, and when the bottom end of the lower sample loading hole (212) is opposite to the top surface of the fixture support seat (201), the bottom end of the lower sample loading hole (212) is closed; The reset guide plate (211) is fixedly mounted on the fixture support seat (201) and can abut against the upper shearing die fixture (206). When the lower shearing die fixture (204) moves 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 die fixture (206) and pushes the upper shearing die 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).

6. A rock shear strength testing device according to claim 5, characterized in that: It also includes a sample unloading pushing mechanism; The sample unloading pushing mechanism includes a mounting cross plate and a sample unloading telescopic mechanism; the mounting cross 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 cross plate, the telescopic end of the sample unloading telescopic mechanism is fixedly mounted on the lower shearing die fixture (204), and the telescopic end of the sample unloading telescopic mechanism can push the lower shearing die fixture (204) to move along the sample unloading slide rail until the bottom end of the lower loading hole (212) is opposite to the top end of the sample unloading groove (202).

7. The rock shear strength testing device according to claim 5, characterized in that: The lower shearing die fixture (204) comprises a lower fixture outer die (2041) and a lower fixture inner die (2042); A lower inner mold mounting hole is vertically provided on the lower fixture outer mold (2041); The lower fixture inner mold (2042) is detachably and shape-fittingly mounted in the lower inner mold mounting hole, and the lower sample loading hole (212) is vertically opened on the lower fixture inner mold (2042).

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

9. The rock shear strength testing device according to claim 1, characterized in that: The upper shearing die fixture (206) comprises an upper fixture outer die (2061) and an upper fixture inner die (2062); An upper inner mold mounting hole is vertically provided on the upper fixture outer mold (2061); The upper fixture inner mold (2062) is detachable and is mounted in the upper inner mold mounting hole in a shape-fitting manner. The upper sample loading hole (207) is vertically opened on the upper fixture inner mold (2062).

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

Images