Cylinder test piece splitting test device and method

Abstract

The invention provides a cylinder test piece splitting test device and method, and belongs to the technical field of cement-based grouting material performance, the cylinder test piece splitting test device comprises a vertical frame, an upper pressure-bearing assembly and a lower pressure-bearing assembly; the upper pressure-bearing assembly is movably mounted on the vertical frame, and during use, the lower pressure-bearing assembly is mounted on the vertical frame and located on the lower side of the upper pressure-bearing assembly; the lower pressure-bearing assembly comprises a lower bearing body, a first lower pressure-bearing piece and a second lower pressure-bearing piece; the lower bearing body is mounted on the vertical frame; the first lower pressure-bearing piece is mounted on the lower bearing body in a limiting manner; the second lower pressure-bearing piece is mounted on the lower bearing body in a limiting manner; the first lower pressure-bearing piece and the second lower pressure-bearing piece are matched to support the cylinder test piece, the upper pressure-bearing assembly, the first lower pressure-bearing piece and the second lower pressure-bearing piece make contact with the cylinder test piece in three directions, and therefore it is guaranteed that the cylinder test piece does not shift or burst out in the splitting process, the test stability is improved, and the test efficiency is improved. And the safety of testers can be effectively ensured.

Description

Technical Field

[0001] This invention belongs to the field of performance testing technology for cement-based grouting materials, and more specifically, it relates to a device and method for splitting test of cylindrical specimens. Background Technology

[0002] Cement-based grouts, as a commonly used building material, bear significant structural loads in engineering projects. To ensure the mechanical properties and structural reliability of cement-based grouts, a series of experimental studies are necessary. Among these, the cylinder splitting test for cement-based grouts is a commonly used method to evaluate their tensile strength and crack resistance.

[0003] The current common method for splitting tests on cylindrical specimens is as follows: a bearing plate is set on the upper and lower sides, and the cylindrical specimen is placed on the lower bearing plate. After placement, a load is applied to the upper bearing plate. The upper and lower bearing plates work together to complete the splitting test on the cylindrical specimen. However, in this test method, when the load is applied to the upper bearing plate during the test, the cylindrical specimen is clamped by the upper and lower bearing plates, which makes it very easy to shift and break out. The cylindrical specimen has great instability in this structural test, resulting in low overall safety.

[0004] Based on the above problems, the applicant applies for the design of a cylindrical splitting test device and method. Summary of the Invention

[0005] The purpose of this invention is to provide a cylindrical specimen splitting test apparatus and method to solve the technical problem that the existing technology has great uncertainty when performing splitting tests on cylindrical specimens, resulting in low overall safety.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, a cylindrical specimen splitting test apparatus is provided, comprising a frame, an upper pressure-bearing component, and a lower pressure-bearing component; the upper pressure-bearing component is movably mounted on the frame, and during use, pressure is applied to the upper pressure-bearing component by a pressure-applying mechanism; the lower pressure-bearing component is mounted on the frame and located below the upper pressure-bearing component, for cooperating with the upper pressure-bearing component to complete the splitting test of the cylindrical specimen; wherein, the lower pressure-bearing component includes a lower bearing body, a first lower pressure-bearing member, and a second lower pressure-bearing member; the lower bearing body is mounted on the frame; the first lower pressure-bearing member is limited and mounted on the lower bearing body; the second lower pressure-bearing member is limited and mounted on the lower bearing body; the first lower pressure-bearing member and the second lower pressure-bearing member cooperate to support the cylindrical specimen.

[0008] In conjunction with the first aspect, in one possible implementation, the upright is provided with a protruding plate, the lower bearing body is mounted on the protruding plate, and the lower bearing body is a semi-annular body. The first lower pressure member and the second lower pressure member have the same structure and are sleeved on the lower bearing body.

[0009] In conjunction with the first aspect, in one possible implementation, sliding sleeves are provided at both ends of the first lower bearing member. The sliding sleeves include a first connecting body and a second connecting body, which are connected to each other. The second connecting body is connected to the end of the first lower bearing member. The first connecting body, the second connecting body, and the first lower bearing member constitute a groove that matches the shape of the lower support body, so that the first lower bearing member can be fitted onto the lower support body and can move along the lower support body.

[0010] In conjunction with the first aspect, in one possible implementation, the first connecting body has a first fastening hole, and the lower bearing body has a plurality of second fastening holes. Fasteners are installed in the first and second fastening holes to fix the first lower bearing member on the lower bearing body. The fasteners are stud sleeves, which include a first stud and a second cylinder. The second cylinder is disposed in the first fastening hole, and the first stud is disposed in the second cylinder. The first stud can be inserted into the second fastening hole, thereby fixing the first lower bearing member on the lower bearing body.

[0011] In conjunction with the first aspect, in one possible implementation, the support frame is further fitted with an upper semi-annular body, the upper semi-annular body having an openable channel, and the upper pressure-bearing component being disposed within the openable channel; visible baffles are hinged to both sides of the support frame, the visible baffles being made of transparent material, thereby allowing observation of the interior of the support frame, and the visible baffles being provided with a transparent soft film, the transparent soft film being able to be lifted and lowered, thereby allowing cylindrical specimens to be inserted into or removed from the support frame.

[0012] In conjunction with the first aspect, in one possible implementation, the upper pressure-bearing component includes a transverse pressure body, a vertical support body, and a pressure-bearing body. The transverse pressure body and the vertical support body are connected to one side of the pressure-bearing body, and the vertical support body is located on both sides of the transverse pressure body, forming a cross structure with the transverse pressure body. The movable channel is also a cross structure, and the transverse pressure body and the vertical support body can move along the movable channel.

[0013] In conjunction with the first aspect, in one possible implementation, a pressure-applying kit is detachably installed on one side of the pressure-bearing body. The pressure-applying kit is provided with an insertion sleeve, the shape of which matches the shape of the pressure-applying mechanism. The inner surface of the insertion sleeve is provided with a friction strip so that when the pressure-applying mechanism is inserted into the insertion sleeve, the insertion sleeve will not fall off under the action of friction.

[0014] In conjunction with the first aspect, in one possible implementation, the support frame is further provided with a support assembly, the support assembly including a support and a first arc panel, the support and the first arc panel being connected, and the curvature of the first arc panel being the same as the curvature of the lower support body, the first arc panel being in contact with the lower support body to support the lower support body.

[0015] In conjunction with the first aspect, in one possible implementation, a support plate is further provided on one side of the support frame. A conveying assembly is provided on the support plate. The conveying assembly includes a second arc panel, a driver, and a telescopic member. The second arc panel is mounted and connected to the support plate. The driver is located between the second arc panel and the support plate. The telescopic member is connected to the output end of the driver and extends out of the opening on the second arc panel. The telescopic member is provided with a telescopic head. The side of the telescopic head is inclined so that when it contacts the side wall of the opening, the telescopic head can retract into the telescopic member.

[0016] Secondly, a method for splitting a cylindrical specimen is provided, using the aforementioned cylindrical specimen splitting test apparatus, comprising the following steps:

[0017] A. Prepare the cylindrical specimen to be tested;

[0018] B. Determine the size of the first lower bearing member and the second lower bearing member, and their positions on the lower support body;

[0019] C. Place the cylindrical specimen splitting test device in a preset position and insert the end of the pressure applying mechanism into the insertion sleeve, so that the pressure applying mechanism can drive the upper pressure bearing component to move.

[0020] D. Place the cylindrical specimen onto the opening on the second arc panel, start the driver, so that the driver drives the telescopic head to push the cylindrical specimen onto the first lower bearing member and the second lower bearing member. Then the end of the driver resets, and during the reset process, the inclined surface of the telescopic head contacts the side wall of the opening, thereby retracting into the telescopic member.

[0021] E. Activate the pressure application mechanism to move the end of the pressure application mechanism downward, thereby driving the upper pressure-bearing component downward until the splitting test of the cylindrical specimen is completed, and then remove the split cylindrical specimen.

[0022] F. Repeat steps D and E, observe and analyze the results of multiple sets of experiments, and summarize the pattern of crack propagation.

[0023] The beneficial effects of the cylindrical specimen splitting test device provided by the present invention are as follows: Compared with the prior art, the present invention provides a cylindrical specimen splitting test device, which includes a stand, an upper pressure-bearing component, and a lower pressure-bearing component. The lower pressure-bearing component further includes a first lower pressure-bearing member and a second lower pressure-bearing member. Thus, when performing a splitting test on a cylindrical specimen, the cylindrical specimen is placed on the first and second lower pressure-bearing members to support it. Furthermore, when the pressure-applying mechanism applies pressure to the upper pressure-bearing component, the upper pressure-bearing component, the first lower pressure-bearing member, and the second lower pressure-bearing member contact the cylindrical specimen in three directions, thereby ensuring that the cylindrical specimen will not shift or break out during the splitting process, improving the stability of the test, and effectively ensuring the safety of the test personnel.

[0024] The beneficial effect of the cylindrical specimen splitting test method provided by the present invention is that, compared with the prior art, the cylindrical specimen splitting test method provided by the present invention, using the above-mentioned cylindrical specimen splitting test device, allows the test personnel to ensure that the cylindrical specimen will not shift or break off during the splitting test, thus ensuring the stability of the cylindrical specimen during the test and improving the safety of the test. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the cylindrical specimen splitting test device provided in an embodiment of the present invention after removing the support plate and the conveying assembly;

[0028] Figure 3 for Figure 2 A schematic diagram of the structure after removing the visible baffle;

[0029] Figure 4 for Figure 3 Exploded view;

[0030] Figure 5 A schematic diagram of the structure of the cylindrical specimen splitting test device provided in an embodiment of the present invention when the first and second lower bearing components are installed on the lower bearing body;

[0031] Figure 6 This is a schematic diagram of the first lower bearing component of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the upper pressure-bearing component of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the stud sleeve assembly of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0034] Figure 9 Another structural schematic diagram of the stud sleeve assembly of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0035] Figure 10 A schematic diagram of the conveying assembly of the cylindrical specimen splitting test device provided in an embodiment of the present invention;

[0036] Figure 11 An exploded view of the conveying assembly of the cylindrical specimen splitting test device provided in an embodiment of the present invention.

[0037] The labels for the attached figures are as follows:

[0038] 10. Upright frame; 11. Protruding plate; 12. Upper semi-circular body; 121. Movement channel; 13. Visible baffle;

[0039] 131. Transparent soft film; 14. Support plate; 20. Upper pressure-bearing component; 21. Lateral pressure body;

[0040] 22. Vertical support; 23. Pressure-bearing body; 24. Pressure-applying assembly; 241. Insert sleeve;

[0041] 242. Friction strip; 30. Lower pressure-bearing assembly; 31. Lower bearing body; 311. Second fastening hole;

[0042] 32. First lower pressure-bearing component; 33. Second lower pressure-bearing component; 34. Sliding assembly; 341. First connecting body;

[0043] 3411, First fastening hole; 342, Second connecting body; 35, Slide groove; 36, Stud sleeve;

[0044] 361. First stud; 362. Second barrel; 40. Support assembly; 41. Support;

[0045] 42. First arc panel; 50. Conveying assembly; 51. Second arc panel; 511. Opening;

[0046] 52. Driver; 53. Telescopic component; 531. Telescopic head. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain the invention and are not intended to limit the invention. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] It should be further noted that the accompanying drawings and embodiments of the present invention mainly describe the concept of the present invention. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of the present invention, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0049] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0050] The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself. The terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0051] 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 beyond the orientation of the device as described in the figures. For example, if the device in the figures were 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, and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0053] The present invention will now describe a cylindrical specimen splitting test apparatus.

[0054] like Figures 1 to 11 As shown, the present invention provides a cylindrical specimen splitting test device, including a frame 10, an upper pressure-bearing component 20, and a lower pressure-bearing component 30; the upper pressure-bearing component 20 is movably mounted on the frame 10, and during use, the upper pressure-bearing component 20 is pressured by a pressure-applying mechanism; the lower pressure-bearing component 30 is mounted on the frame 10 and located below the upper pressure-bearing component 20, for cooperating with the upper pressure-bearing component 20 to complete the splitting test of the cylindrical specimen; wherein, the lower pressure-bearing component 30 includes a lower bearing body 31, a first lower pressure-bearing member 32, and a second lower pressure-bearing member 33; the lower bearing body 31 is mounted on the frame 10; the first lower pressure-bearing member 32 is limited and mounted on the lower bearing body 31; the second lower pressure-bearing member 33 is limited and mounted on the lower bearing body 31; the first lower pressure-bearing member 32 and the second lower pressure-bearing member 33 cooperate to support the cylindrical specimen.

[0055] The cylindrical specimen splitting test apparatus provided by this invention, compared with the prior art, includes a support frame 10, an upper pressure-bearing component 20, and a lower pressure-bearing component 30. The lower pressure-bearing component 30 further includes a first lower pressure-bearing member 32 and a second lower pressure-bearing member 33. During the splitting test of the cylindrical specimen, the specimen is placed on the first and second lower pressure-bearing members 32 and 33 for support. When the pressure-applying mechanism applies pressure to the upper pressure-bearing component 20, the upper pressure-bearing component 20, the first lower pressure-bearing member 32, and the second lower pressure-bearing member 33 contact the cylindrical specimen in three directions, ensuring that the cylindrical specimen does not shift or splinter during the splitting process, improving the stability of the test, and effectively ensuring the safety of the test personnel.

[0056] like Figure 3 and Figure 4 As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, a convex plate 11 is provided on the upright 10, and a lower support body 31 is installed on the convex plate 11. The lower support body 31 is semi-annular. The first lower bearing member 32 and the second lower bearing member 33 have the same structure and are sleeved on the lower support body 31. Before installing the lower support body 31 onto the convex plate 11, it is necessary to select a first lower bearing member 32 and a second lower bearing member 33 of appropriate size that can support the cylindrical specimen, and then sleeve the first lower bearing member 32 and the second lower bearing member 33 onto the lower support body 31. By setting the shape of the lower support body 31 to a semi-annular structure, the first lower bearing member 32 and the second lower bearing member 33 can move along the lower support body 31. Compared with the lower support body 31 being set to a plate structure, when performing a splitting test on a cylindrical specimen of the same specification, when the lower support body of the semi-annular structure is set to a plate structure, the first lower bearing member 32 and the second lower bearing member 33 can move along the lower support body 31. When the positions of the first lower bearing member 32 and the second lower bearing member 33 on the bearing body 31 need to change to conduct tests in multiple directions, a cylindrical specimen is placed on it. The height of the cylindrical specimen remains constant, and the contact lines between the sides of the first lower bearing member 32 and the second lower bearing member 33 and the sides of the cylindrical specimen are always aligned. However, when the positions of the first lower bearing member 32 and the second lower bearing member 33 on the plate-type lower bearing body 31 change, the height of the cylindrical specimen changes, and the contact lines between the sides of the first lower bearing member 32 and the second lower bearing member 33 and the sides of the cylindrical specimen constantly change. If the surfaces of the cylindrical specimen, the first lower bearing member 32, and the second lower bearing member 33 are not smooth enough, the resulting test error will increase. Therefore, compared to the plate-type lower bearing body 31, the semi-annular lower bearing body 31 is more convenient for testing and has a smaller test error.

[0057] like Figure 5 and Figure 6As shown in the embodiment of the cylindrical specimen splitting device provided in this invention, sliding sleeves 34 are provided at both ends of the first lower bearing member 32. The sliding sleeves 34 include a first connecting body 341 and a second connecting body 342. The first connecting body 341 and the second connecting body 342 are connected to each other, and the second connecting body 342 is connected to the end of the first lower bearing member 32. The connection method is welding. The first connecting body 341, the second connecting body 342 and the first lower bearing member 32 constitute a groove 35 that matches the shape of the lower bearing body 31, so that the first lower bearing member 32 can be sleeved on the lower bearing body 31 and can move along the groove 35. The lower support body 31 is movable. When the first lower pressure member 32 and the second lower pressure member 33 are fitted onto the lower support body 31, the first lower pressure member 32 and the second lower pressure member 33 are fitted onto the ends of the lower support body 31. The two ends of the lower support body 31 can be inserted into the sliding grooves 35 at the ends of the first lower pressure member 32 and the second lower pressure member 33 to slide and adjust the position. After the position adjustment is completed, the lower support body 31 can be installed on the convex plate 11. Fixing holes are opened on the convex plate 11 and on the two end faces of the lower support body 31. Bolts are screwed into the fixing holes to fix the lower support body 31 on the convex plate 11.

[0058] like Figure 5 , Figure 6 , Figure 8 and Figure 9As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, a first fastening hole 3411 is provided on the first connecting body 341, and a plurality of second fastening holes 311 are provided on the lower bearing body 31. Fasteners are installed in the first fastening holes 3411 and the second fastening holes 311, so that the first lower bearing member 32 is fixed on the lower bearing body 31. The fastener is a stud sleeve 36, which includes a first stud 361 and a second screw 362. The second screw 362 is disposed in the first fastening hole 3411, and the first stud 361 is disposed in the second screw 362. The first stud 361 can be inserted into the second fastening hole 311, thereby fixing the first lower bearing member 32 on the lower bearing body 31. Specifically, the first fastening hole 3411 is located within the first fastening hole 3411. The threads of the first screw and the second screw cylinder 362 are matched with the threads on the outer surface of the first screw cylinder 362 and the inner surface of the second fastening hole 311. Thus, when the second screw cylinder 362 is threaded into the first fastening hole 3411, the first stud 361 located in the second screw cylinder 362 is turned, and the first stud 361 will enter into the second fastening hole 311 and be threaded into the second fastening hole 311. This design means that when the first lower pressure member 32 and the second lower pressure member 33 need to be moved frequently, only the first stud 361 needs to be turned to control the position of the first stud 361, which can achieve unlocking. Compared with using bolts, the entire stud assembly 36 will not fall off during the entire process. When adjusting, there is no need to hold the bolt with your hands, freeing up your hands and making the operation convenient.

[0059] like Figure 3 , Figure 4 and Figure 7As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, an upper half-ring 12 is also fitted on the stand 10. An movable channel 121 is opened on the upper half-ring 12, and an upper pressure-bearing component 20 is arranged within the movable channel 121. After the cylindrical specimen is placed on the first lower pressure-bearing component 32 and the second lower pressure-bearing component 33, and the lower support body 31 is fixed, the upper half-ring 12 can be fitted onto the stand 10. Then, the upper pressure-bearing component 20 can be placed into the movable channel 121. By setting the upper half-ring 12, it can form a cylindrical shape together with the lower support body 31. In this way, during the splitting test, the outer circumference of the cylindrical specimen is surrounded. Therefore, most of the fragments that break off will be blocked by the upper annular body 12 and the lower support body 31, ensuring the safety of the test personnel. The two sides of the stand 10 are hinged with a visible baffle 13. The visible baffle 13 is made of transparent material, so that the internal situation of the stand 10 can be observed. The visible baffle 13 is provided with a transparent soft film 131. The transparent soft film 131 can be lifted and dropped, so that cylindrical specimens can be sent into or removed from the stand 10. By setting the visible baffle 13, the test personnel can clearly observe the test situation inside the stand 10. If an unexpected situation is observed, they can make an immediate judgment and deal with it in time. The visible baffle 13 and the transparent soft film 131 can also prevent fragments from breaking off.

[0060] like Figure 4 and Figure 7 As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, the upper pressure assembly 20 includes a transverse pressure body 21, a vertical support body 22, and a pressure-bearing body 23. The transverse pressure body 21 and the vertical support body 22 are connected to one side of the pressure-bearing body 23, and the vertical support body 22 is located on both sides of the transverse pressure body 21, forming a "+" structure with the transverse pressure body 21. The movable channel 121 is also a "+" structure, and the transverse pressure body 21 and the vertical support body 22 can move along the movable channel 121. In this embodiment, the transverse pressure body 21 and the vertical support body 22 form a "+" structure and are inserted into the movable channel 121 that matches their shape. By setting it as a "+" structure, the movable channel 121 plays a limiting role for the transverse pressure body 21 and the vertical support body 22, which ensures that the upper pressure assembly 20 moves vertically when a load is applied to the pressure-bearing body 23, and avoids the transverse pressure body 21 from shifting during the pressing process, which would lead to test failure.

[0061] like Figure 4As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, in order to further ensure that the upper pressure-bearing component 20 will not shift during the splitting test, thus preventing test failure, a pressure-applying kit 24 is detachably installed on one side of the pressure-bearing body 23. This kit is fixed to the pressure-bearing body 23 by bolts. The pressure-applying kit 24 is provided with an insertion sleeve 241. The shape of the insertion sleeve 241 matches the shape of the pressure-applying mechanism. If the end of the pressure-applying mechanism is square, the insertion sleeve 241 can be replaced with a square one; if it is round, the insertion sleeve 241 can be replaced with a round one. 1. Replace with a circular shape; the inner surface of the insertion sleeve 241 is provided with a friction strip 242, so that when the pressure applying mechanism is inserted into the insertion sleeve 241, the insertion sleeve 241 will not fall off under the action of friction. Alternatively, another method can be used: make a hole on the side of the insertion sleeve 241, insert the pressure applying mechanism, and then screw a bolt into the hole so that the bolt holds the pressure applying mechanism, ensuring that the pressure applying mechanism can drive the upper pressure bearing component 20 to move up and down; thus, the upper pressure bearing component 20 and the pressure applying mechanism are integrated into a single structure, so that the upper pressure bearing component 20 will not easily shift when a load is applied.

[0062] like Figure 4 As shown in the embodiment of the cylindrical specimen splitting device provided in this invention, the support frame 10 is further provided with a support component 40. The support component 40 includes a support 41 and a first arc panel 42. The support 41 and the first arc panel 42 are connected, and the curvature of the first arc panel 42 is the same as the curvature of the lower support body 31. The first arc panel 42 is in contact with the lower support body 31 to support the lower support body 31.

[0063] Furthermore, to ensure that the lower support body 31 does not deform during the splitting process, thus preventing test failure, a support component 40 is provided on the lower side of the lower support body 31. The support 41 is a jack, and its end is fixedly connected to the first arc panel 42, preferably by welding. The curvature of the first arc panel 42 is the same as that of the lower support body 31. Under the support of the support 41, the first arc panel 42 is attached to one side of the lower support body 31 and supports the lower support body 31, making the lower support body 31 more stable and preventing the lower support body 31 from deforming under the extrusion pressure during the test, which would lead to test failure.

[0064] like Figure 1 , Figure 10 and Figure 11As shown in the embodiment of the cylindrical specimen splitting device provided by the present invention, in order to test the batch of cylindrical specimens and ensure the safety of the test personnel, a support plate 14 is also provided on one side of the stand 10. A conveying assembly 50 is provided on the support plate 14. The conveying assembly 50 includes a second arc panel 51, a driver 52, and a telescopic member 53. The second arc panel 51 is mounted and connected to the support plate 14. The driver 52 is located between the second arc panel 51 and the support plate 14. The telescopic member 53 is connected to the output end of the driver 52 and extends out of the opening 511 on the second arc panel 51. The telescopic member 53 is provided with a telescopic head 531. The side of the telescopic head 531 is inclined so that when it contacts the side wall of the opening 511, the telescopic head 531 can retract into the telescopic member 53. A notch is provided on the visible baffle 13 to avoid the telescopic head 531.

[0065] In one specific embodiment, the telescopic head 531 includes a claw that is vertically slidably disposed on the telescopic member 53 and an elastic member disposed between the claw and the telescopic member 53 to support the extension of the claw; in order to improve the efficiency of picking up and placing cylindrical specimens, the part of the claw connected to the telescopic member 53 is a rigid structure, and the part in contact with the cylindrical specimen is a soft rubber friction body to increase the friction between the soft rubber friction body and the rigid structure. One end of the soft rubber friction body is fixedly connected to the rigid structure, and the other end extends towards the first lower bearing member 32 and the second lower bearing member 33 and hangs down slightly, so as to extend between the first lower bearing member 32 and the second lower bearing member 33.

[0066] During the test, the visible baffle 13 is first opened, and one of the cylindrical specimens is placed on the second arc panel 51 and pushed onto the opening 511. After it is pushed in place, the driver 52 (which can be an electric push rod or a hydraulic cylinder, etc.) is activated. The telescopic member 53 connected to the output end of the driver 52 will push the cylindrical specimen to move and finally push the cylindrical specimen along the second arc panel 51 onto the first lower pressure member 32 and the second lower pressure member 33. After it is in place, the visible baffle 13 is closed, and the pressure mechanism is pressed down to split the cylindrical specimen. After the splitting of the cylindrical specimen is completed, the pressure mechanism is lifted, the visible baffle 13 is opened, the driver 52 drives the telescopic member 53 to retract, and the telescopic head 531 brings out the cylindrical specimen after the test. Since the supporting force provided by the telescopic head 531 to the cylindrical specimen is much lower than the downward force of the pressure mechanism when the pressure mechanism presses down on the cylindrical specimen, the error caused by the telescopic head 531 is very small. If the experimental results are particularly accurate, before the pressure mechanism presses down, the cylindrical specimen is held in place by a long rod, and the telescopic member 53 is retracted by the driver 52. After the pressure mechanism presses down, the telescopic member 53 is extended by the driver 52, so that the telescopic head 531 re-enters between the first lower bearing member 32 and the second lower bearing member 33, and the telescopic member 53 is retracted by the driver 52 again, so that the telescopic head 531 brings the cylindrical specimen out.

[0067] This process is repeated until the batch of tests is completed. When placing cylindrical specimens, this device does not require the use of both hands to feed the cylindrical specimens into and place them into the stand 10. When the pressure mechanism is lifted, it will also drive the upper pressure component 20 to lift, thereby controlling the driver 52 to push the cylindrical specimens onto the first lower pressure component 32 and the second lower pressure component 33. This not only makes the operation convenient, but also further ensures the safety of the experimental personnel.

[0068] Furthermore, in order to improve the efficiency of removing the cylindrical specimen, the soft rubber friction body is provided with an adhesive bladder in the middle, which contains self-adhesive, and an adhesive outlet hole is provided on the contact surface between the soft rubber friction body and the cylindrical specimen; when the pressure mechanism presses down, and when the soft rubber friction body bends due to the front end hitting the cylindrical specimen, the cylindrical specimen and the telescopic member 53 squeeze the self-adhesive in the adhesive bladder out of the adhesive outlet hole, sticking the cylindrical specimen to the soft rubber friction body.

[0069] Based on the same inventive concept, this application also provides a method for splitting a cylindrical specimen, using the above-mentioned cylindrical specimen splitting test apparatus, including the following steps:

[0070] A. Prepare the cylindrical specimen to be tested;

[0071] B. Determine the size of the first lower bearing member 32 and the second lower bearing member 33, as well as their positions on the lower bearing body 31;

[0072] C. Place the cylindrical specimen splitting test device in the preset position and insert the end of the pressure applying mechanism into the insertion sleeve 241 so that the pressure applying mechanism can drive the upper pressure component 20 to move.

[0073] D. Place the cylindrical specimen on the opening 511 on the second arc panel 51, start the driver 52, so that the driver 52 drives the telescopic head 531 to push the cylindrical specimen onto the first lower bearing member 32 and the second lower bearing member 33. Then the end of the driver 52 is reset, and during the reset process, the inclined surface of the telescopic head 531 contacts the side wall of the opening 511, thereby retracting into the telescopic member 53.

[0074] E. Start the pressure application mechanism, causing the end of the pressure application mechanism to move down, which in turn drives the upper pressure component 20 to move down until the splitting test of the cylindrical specimen is completed, and then take out the split cylindrical specimen.

[0075] F. Repeat steps D and E, observe and analyze the results of multiple sets of experiments, and summarize the pattern of crack propagation.

[0076] The present invention provides a method for splitting a cylindrical specimen. Compared with the prior art, the cylindrical specimen splitting test method provided by the present invention, using the above-mentioned cylindrical specimen splitting test device, allows the tester to ensure that the cylindrical specimen will not shift or break off during the splitting test, thus ensuring the stability of the cylindrical specimen during the test and improving the safety of the test.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for testing the splitting of a cylindrical specimen, characterized in that, include: Frame (10); The upper pressure-bearing component (20) is movably mounted on the upright (10). When in use, the upper pressure-bearing component (20) is subjected to pressure by the pressure-applying mechanism. The lower pressure-bearing component (30) is installed on the stand (10) and located below the upper pressure-bearing component (20) to cooperate with the upper pressure-bearing component (20) to complete the splitting test of the cylindrical specimen; The lower pressure-bearing component (30) includes: The lower support body (31) is installed on the upright frame (10); The first lower bearing member (32) is limited and installed on the lower bearing body (31); The second lower bearing member (33) is limited and installed on the lower bearing body (31); The first lower bearing member (32) and the second lower bearing member (33) work together to support the cylindrical specimen.

2. The cylindrical specimen splitting test apparatus as described in claim 1, characterized in that: The upright (10) is provided with a protruding plate (11), the lower bearing body (31) is installed on the protruding plate (11), and the lower bearing body (31) is a semi-annular body. The first lower pressure member (32) and the second lower pressure member (33) have the same structure, and the first lower pressure member (32) and the second lower pressure member (33) are sleeved on the lower bearing body (31).

3. The cylindrical specimen splitting test apparatus as described in claim 2, characterized in that: The first lower bearing member (32) has sliding sleeves (34) at both ends. The sliding sleeves (34) include a first connecting body (341) and a second connecting body (342). The first connecting body (341) and the second connecting body (342) are connected to each other. The second connecting body (342) is connected to the end of the first lower bearing member (32). The first connecting body (341), the second connecting body (342) and the first lower bearing member (32) form a groove (35) that matches the shape of the lower bearing body (31) so that the first lower bearing member (32) can be sleeved on the lower bearing body (31) and can move along the lower bearing body (31).

4. The cylindrical specimen splitting test apparatus as described in claim 3, characterized in that: The first connecting body (341) has a first fastening hole (3411), and the lower bearing body (31) has a plurality of second fastening holes (311). Fasteners are installed in the first fastening holes (3411) and the second fastening holes (311) so that the first lower bearing member (32) is fixed on the lower bearing body (31). The fastener is a stud sleeve (36), which includes a first stud (361) and a second screw (362). The second screw (362) is located in the first fastening hole (3411), and the first stud (361) is located in the second screw (362). The first stud (361) can be inserted into the second fastening hole (311), thereby fixing the first lower bearing member (32) on the lower bearing body (31).

5. The cylindrical specimen splitting test apparatus as described in claim 1, characterized in that: The support frame (10) is also fitted with an upper half-ring (12), and the upper half-ring (12) has an open movable channel (121). The upper pressure-bearing component (20) is installed in the movable channel (121). The two sides of the support frame (10) are hinged with a visible baffle (13). The visible baffle (13) is made of transparent material, so that the inside of the support frame (10) can be observed. The visible baffle (13) is provided with a transparent soft film (131). The transparent soft film (131) can be lifted and dropped, so that a cylindrical specimen can be sent into or removed from the support frame (10).

6. The cylindrical specimen splitting test apparatus as described in claim 5, characterized in that: The upper pressure-bearing component (20) includes a horizontal pressure body (21), a vertical support body (22), and a pressure-bearing body (23). The horizontal pressure body (21) and the vertical support body (22) are connected to one side of the pressure-bearing body (23), and the vertical support body (22) is located on both sides of the horizontal pressure body (21), forming a "+" structure with the horizontal pressure body (21). The movable channel (121) is also a "+" structure, and the horizontal pressure body (21) and the vertical support body (22) can move along the movable channel (121).

7. The cylindrical specimen splitting test apparatus as described in claim 6, characterized in that: A pressure-applying kit (24) is detachably installed on one side of the pressure-bearing body (23). The pressure-applying kit (24) is provided with an insertion sleeve (241). The shape of the insertion sleeve (241) matches the shape of the pressure-applying mechanism. The inner surface of the insertion sleeve (241) is provided with a friction strip (242) so that when the pressure-applying mechanism is inserted into the insertion sleeve (241), the insertion sleeve (241) will not fall off under the action of friction.

8. The cylindrical specimen splitting test apparatus as described in claim 1, characterized in that: The support frame (10) is also provided with a support assembly (40), which includes a support (41) and a first arc panel (42). The support (41) and the first arc panel (42) are connected, and the curvature of the first arc panel (42) is the same as the curvature of the lower support body (31). The first arc panel (42) is in contact with the lower support body (31) to support the lower support body (31).

9. The cylindrical specimen splitting test apparatus as described in claim 7, characterized in that: A support plate (14) is provided on one side of the support frame (10). A conveying assembly (50) is provided on the support plate (14). The conveying assembly (50) includes a second arc panel (51), a driver (52), and a telescopic member (53). The second arc panel (51) is mounted and connected to the support plate (14). The driver (52) is located between the second arc panel (51) and the support plate (14). The telescopic member (53) is connected to the output end of the driver (52) and extends out of the opening (511) on the second arc panel (51). The telescopic member (53) is provided with a telescopic head (531). The side of the telescopic head (531) is inclined so that when it contacts the side wall of the opening (511), the telescopic head (531) can retract into the telescopic member (53).

10. A method for splitting a cylindrical specimen, characterized in that, The cylindrical specimen splitting test apparatus according to claim 9 includes the following steps: A. Prepare the cylindrical specimen to be tested; B, determine the size of the first lower bearing member (32) and the second lower bearing member (33), and their positions on the lower support body (31); C, Place the cylindrical specimen splitting test device in the preset position and insert the end of the pressure applying mechanism into the insertion sleeve (241) so that the pressure applying mechanism can drive the upper pressure bearing component (20) to move; D. Place the cylindrical specimen on the opening (511) on the second arc panel (51), start the driver (52), so that the driver (52) drives the telescopic head (531) to push the cylindrical specimen onto the first lower bearing member (32) and the second lower bearing member (33). Then the end of the driver (52) is reset, and during the reset process, the inclined surface of the telescopic head (531) contacts the side wall of the opening (511), thereby retracting into the telescopic member (53). E, start the pressure application mechanism, so that the end of the pressure application mechanism moves down, thereby driving the upper pressure component (20) to move down until the splitting test of the cylindrical specimen is completed, and then take out the split cylindrical specimen. F. Repeat steps D and E, observe and analyze the results of multiple sets of experiments, and summarize the pattern of crack propagation.

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