A rock strength detection device

Abstract

The rock strength detection device belongs to the field of material testing, and comprises a work platform, a door-shaped frame, a first hydraulic cylinder and a pressure head. A lifting load plate is slidingly installed in the door-shaped frame. Two second hydraulic cylinders are fixedly installed at the top of the door-shaped frame. The output ends of the two second hydraulic cylinders are fixedly connected with the lifting load plate. A rotating ring is rotatably installed through the lifting load plate. A plurality of end face perpendicularity detection mechanisms are symmetrically distributed on the rotating ring. A first gear is fixedly sleeved on the outer wall of the rotating ring and located above the lifting load plate. A first motor is fixedly installed at the top of the lifting load plate. The rock strength detection device can realize automatic and comprehensive detection of the end face perpendicularity of a rock sample, can automatically mark the inclined position, and has the advantages of safety protection and automatic cleaning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material testing, and particularly relates to a rock strength detection device. BACKGROUND

[0002] Rock strength detection is an important basic work in the fields of geological exploration and building engineering, which simulates the bearing state of rock under actual stress environment, measures the mechanical performance parameters such as compressive strength and shear strength of rock, and provides key data support for engineering design and structure safety evaluation. In the rock strength detection, the end surface level of the rock sample is crucial, because only when the end surface of the sample is perpendicular to the pressure direction (i.e. the end surface level meets the requirements) can the pressure be uniformly distributed on the entire end surface of the sample, so as to obtain accurate strength detection results. If the end surface is inclined, additional bending moment will be generated when pressure is applied, which will cause uneven pressure distribution and make the detected strength value deviate from the true value, seriously affecting the reliability of the detection data and the engineering application value.

[0003] The existing rock strength detection device lacks the automatic detection function of the end surface level of the rock sample, mainly relying on manual visual inspection or simple tools for rough judgment. Since the unqualified samples with end surface level cannot be reliably detected and excluded, the abnormal pressure distribution caused by the inclined end surface of the sample often occurs in the detection process, which further causes large detection result error and cannot accurately reflect the true strength performance of the rock.

[0004] Therefore, it is necessary to provide a rock strength detection device to solve the above technical problems. SUMMARY

[0005] The technical problem solved by the present application is to provide a rock strength detection device which can realize automatic and full-range detection of the perpendicularity of the end surface of the rock sample, can automatically mark the inclined position, and has safety protection and automatic cleaning functions.

[0006] To solve the above technical problems, the rock strength detection device provided by the present application comprises a working platform, a door-shaped frame, a first hydraulic cylinder and a pressure head, the door-shaped frame is installed on the top of the working platform, the first hydraulic cylinder is fixedly installed on the top of the door-shaped frame, and the output end extends into the door-shaped frame, the pressure head is installed on the output end of the first hydraulic cylinder, a lifting load plate is slidingly installed in the door-shaped frame, two second hydraulic cylinders are fixedly installed on the top of the door-shaped frame, the output ends of the two second hydraulic cylinders extend into the door-shaped frame and are fixedly connected with the lifting load plate, a rotating ring is penetratingly and rotatably installed on the lifting load plate, a first gear is fixedly sleeved on the outer wall of the rotating ring and located above the lifting load plate, a first motor is fixedly installed on the top of the lifting load plate, a second gear is fixedly installed on the output end of the first motor and engaged with the first gear, a plurality of end face perpendicularity detection mechanisms are installed on the rotating ring and distributed in a rotational symmetry, for detecting whether the end face of a rock sample is perpendicular to the pressure direction of the pressure head, and the end face perpendicularity detection mechanism is located below the first gear.

[0007] Preferably, any one of the end face perpendicularity detection mechanisms comprises a U-shaped frame, a first electromagnetic suction disc, an L-shaped sliding rod, a first tension spring and a contact wheel, the U-shaped frame is fixedly installed on the outer wall of the rotating ring, the first electromagnetic suction disc is fixedly installed on the inner wall of the side of the U-shaped frame away from the rotating ring, the L-shaped sliding rod is arranged in the U-shaped frame, the vertical rod section of the L-shaped sliding rod is located in the rotating ring, the contact wheel is rotatably sleeved on the bottom end of the vertical rod section of the L-shaped sliding rod, a first sliding plate is slidingly installed in the U-shaped frame, one end of the L-shaped sliding rod close to the first electromagnetic suction disc is fixedly connected with the first sliding plate, the first tension spring is sleeved on the L-shaped sliding rod, one end of the first tension spring is fixedly connected with the rotating ring, and the other end is fixedly connected with the first sliding plate.

[0008] Further, a first insulating plate is fixedly installed on the first sliding plate, a first conductive block is fixedly installed on the first insulating plate, a first fixed block is fixedly installed in the U-shaped frame, a multi-angle sliding rod is penetratingly and slidingly installed in the first fixed block, a second insulating plate is fixedly installed on one end of the multi-angle sliding rod close to the first sliding plate, a second conductive block is fixedly installed on the second insulating plate, and a compression spring is sleeved on the multi-angle sliding rod, one end of the compression spring is in contact with the rotating ring, and the other end is in contact with the second insulating plate.

[0009] Further, the U-shaped frame is internally provided with a marking assembly, which comprises a second sliding plate, a second tension spring, a marking circular tube and a second electromagnetic chuck, the second sliding plate is slidingly installed on the inner wall of one side of the U-shaped frame, a fixed cylinder is fixedly installed on the second sliding plate, the marking circular tube is fixedly installed in the fixed cylinder, one end of the marking circular tube extending into the rotating ring away from the second sliding plate is fixedly installed with a marking cotton, the second electromagnetic chuck is fixedly installed in the U-shaped frame, the working surface of the second sliding plate is attracted to the working surface of the second electromagnetic chuck, the second tension spring is sleeved on the marking circular tube, one end of the second tension spring is fixedly connected with the second sliding plate, and the other end is fixedly connected with the rotating ring.

[0010] Further, an injection tube is obliquely fixedly installed in the marking circular tube, one end of the injection tube extending above the marking circular tube, the end of the injection tube located in the marking circular tube is in contact with the marking cotton, and a liquid outlet micropore is formed.

[0011] Preferably, a guide cylinder is fixedly installed through the rotating ring, the marking circular tube penetrates through the guide cylinder and is slidingly connected with the inner wall of the guide cylinder.

[0012] Further, the bottom of the lifting carrier plate is fixedly installed with an upper cover, the bottom of the upper cover is fixedly installed with a multi-stage blocking ring, the multi-stage blocking ring comprises a plurality of nested blocking units, the inner side wall of the outer blocking unit in any two adjacent blocking units is slidingly connected with the outer side wall of the inner blocking unit, and the top of the upper cover is installed with a plurality of accommodation and release mechanisms which are rotationally symmetrically distributed, for realizing overall accommodation or release of the multi-stage blocking ring.

[0013] Preferably, any one of the accommodation and release mechanisms comprises a winding wheel, a lifting rope and a second motor, the top of the upper cover is fixedly installed with a support frame, the winding wheel is rotatably installed in the support frame, the lifting rope is wound in the winding wheel, a plurality of second fixed blocks which are rotationally symmetrically distributed are fixedly installed on the outer wall of the innermost blocking unit and close to the bottom position, and the bottom end of the lifting rope is fixedly connected with the corresponding second fixed block.

[0014] Further, the accommodation and release mechanism further comprises a guide pulley, the guide pulley is fixedly installed on the top of the upper cover, and the lifting rope passes through the wheel groove of the guide pulley.

[0015] Preferably, the top of the working platform is rotatably provided with a rotatable plate, the door-shaped frame is fixedly arranged on the top of the rotatable plate, third hydraulic cylinders are rotatably arranged on the two side walls of the working platform, the output ends of the two third hydraulic cylinders are respectively rotatably connected with the two side walls of the rotatable plate, a material guiding groove plate is fixedly arranged on the working platform and located at the rear side, and two material guiding inclined plates are fixedly arranged on the top of the rotatable plate.

[0016] Compared with the related art, the rock strength detection device has the following beneficial effects:

[0017] Through the arrangement of the second hydraulic cylinder, the lifting load plate, the first motor and the end face perpendicularity detection mechanism, when the end face perpendicularity detection mechanism reaches the detection position and the first electromagnetic suction disc is powered off, the L-shaped slide rod is released, the contact wheel can be in contact with the part of the outer circumferential wall of the rock sample close to the top under the action of the first tension spring, the contact wheel can roll along the circumference of the sample by rotating the rotating ring driven by the first motor, and when the end face of the rock sample is inclined, the contact wheel moves towards the axis of the rock sample, the sound and light alarm is triggered by the contact of the first and second conductive blocks, the automation and omnibearing detection of the end face levelness of the rock sample are realized, the problem that the uneven pressure distribution caused by the poor end face levelness of the rock sample deviates the true value of the detected strength value is effectively eliminated, and the reliability of the rock strength detection result is improved.

[0018] Through the arrangement of the marking assembly, when the contact wheel detects the inclination and drives the first and second conductive blocks to contact, the second electromagnetic suction disc is powered off, the marking assembly pushes the marking cotton into contact with the sample under the action of the second tension spring, and the clear mark is left by using the pre-injected ink, so that the linkage design can ensure that the inclination is detected and the marking is immediately completed, the inclination position can be quickly identified by the detection personnel, the cumbersome manual marking steps are saved, and the operation convenience is improved.

[0019] Through the arrangement of the upper cover, the multi-stage blocking ring and the storage and release mechanism, the multi-stage blocking ring is composed of a plurality of nested blocking units, can be expanded under the control of the storage and release mechanism, forms a protective barrier, can block the splashing of the fragments, safeguards the operation safety on one side, and enables the fragments to be concentrated on the other side; in combination with the arrangement of the third hydraulic cylinder, the rotatable plate and other components, after the detection is completed, the third hydraulic cylinder pushes the rotatable plate to be inclined, the fragments can slide into the material guiding groove plate along the material guiding inclined plate, and finally fall into the corresponding receiving vessel, so that relevant personnel only need to carefully clean the positioning circular table, the manual cleaning operation link can be effectively reduced, and the convenience of using the device is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1A structural schematic view of a rock strength detection device provided by the present application is shown in the figure;

[0021] Figure 2 A structural schematic view of the rock strength detection device is shown in the figure; Figure 1

[0022] Figure 3 Figure 1

[0023] Figure 4 Figure 3

[0024] Figure 5 Figure 4

[0025] Figure 6 Figure 5

[0026] Figure 7 Figure 5

[0027] Figure 8 Figure 7

[0028] Figure 9 Figure 7

[0029] Figure 10 Figure 7

[0030] Figure 11

[0031] Figure 12 Figure 6

[0032] Figure 13 Figure 5

[0033] Figure 14 Figure 13

[0034]

[0035] ​​​​​​​​​​​​​​​​​​​​​​​​​1, work platform; 2, door frame; 3, first hydraulic cylinder; 4, pressure head; 5, lifting load plate; 6, second hydraulic cylinder; 7, rotating ring; 8, first gear; 9, first motor; 10, second gear; 11, U-shaped frame; 12, first electromagnetic chuck; 13, L-shaped slide bar; 14, first slide plate; 15, first conductive block; 16, first tension spring; 17, first fixed block; 18, multi-angle slide bar; 19, compression spring; 20, second conductive block; 21, contact wheel; 22, second slide plate; 23, second tension spring; 24, marking round pipe; 25, second electromagnetic chuck; 26, marking cotton; 27, liquid injection pipe; 28, upper cover; 29, multi-stage blocking ring; 30, second fixed block; 31, winding wheel; 32, hanging rope; 33, second motor; 34, guide pulley; 35, rotatable load plate; 36, third hydraulic cylinder; 37, material guide groove plate; 38, material guide inclined plate. DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the drawings and embodiments.

[0037] Please refer to Figures 1-14The utility model provides a rock strength detection device, it includes: work platform 1, door frame 2, first hydraulic cylinder 3 and anvil 4, the bottom of work platform 1 is equipped with electrical control box, is used for the start of each electric component, running and state regulation and control, door frame 2 is installed at the top of work platform 1, first hydraulic cylinder 3 is fixedly installed at the top of door frame 2, and the output end extends to door frame 2, anvil 4 is installed on the output end of first hydraulic cylinder 3, and first hydraulic cylinder 3 is driven anvil 4 to move along the vertical direction through the output end telescopic, realizes the pressure action to rock sample, and the pressure sensor is arranged between anvil 4 and the output end of first hydraulic cylinder 3, is used for the real -time detection of the axial pressure that first hydraulic cylinder 3 applies on rock sample, and the lifting load plate 5 is slidably installed in door frame 2, specifically, the top of door frame 2 is slidably installed with multiple guide slide bars, and the bottom of multiple guide slide bars all extends to door frame 2 and is fixedly connected with lifting load plate 5, and the top of door frame 2 is fixedly installed with two second hydraulic cylinders 6, and the output end of two second hydraulic cylinders 6 all extends to door frame 2, and all is fixedly connected with lifting load plate 5, and the rotating ring 7 is installed on the lifting load plate 5 and is penetrated and rotatably installed, the first gear 8 of the outer wall of rotating ring 7 is fixedly provided with being located above lifting load plate 5, and the top of lifting load plate 5 is fixedly installed with first motor 9, and the output end of first motor 9 is fixedly installed with second gear 10, and second gear 10 is engaged with first gear 8, and rotating ring 7 is installed with multiple end face perpendicularity detection mechanisms that are rotationally symmetrical distribution, is used for detecting whether the end face of rock sample is perpendicular to the pressure direction of anvil 4, and end face perpendicularity detection mechanism is located below first gear 8, when first motor 9 operates, drives second gear 10 to rotate, drives rotating ring 7 to rotate around its axis by the meshing transmission of second gear 10 and first gear 8, to realize the circumferential position adjustment of end face perpendicularity detection mechanism, and the both sides inner wall of door frame 2 are all installed with positioning block, when lifting load plate 5 contacts positioning block, end face perpendicularity detection mechanism reaches the predetermined detection position, and two second hydraulic cylinders 6 stop pushing lifting load plate 5.

[0038] Preferably, any one end surface perpendicularity detection mechanism comprises a U-shaped frame 11, a first electromagnetic suction cup 12, an L-shaped slide rod 13, a first tension spring 16 and a contact wheel 21, the U-shaped frame 11 is fixedly installed on the outer wall of the rotating ring 7, the first electromagnetic suction cup 12 is fixedly installed on the inner wall of the side of the U-shaped frame 11 away from the rotating ring 7, in the initial state, the first electromagnetic suction cup 12 is in the energized state, the magnetic force generated thereby adsorbs the first slide plate 14, limiting the initial position of the L-shaped slide rod 13, the purpose being to make the contact wheel 21 be in the position close to the rotating ring 7, and not to be in abutment with the rock sample during the lowering process, when the lifting load plate 5 is in contact with the positioning block, the first electromagnetic suction cup 12 is de-energized, releasing the L-shaped slide rod 13 to perform the detection action, the L-shaped slide rod 13 is arranged in the U-shaped frame 11, the vertical rod section of the L-shaped slide rod 13 is located in the rotating ring 7, the contact wheel 21 is rotatably sleeved at the bottom end of the vertical rod section of the L-shaped slide rod 13, the first slide plate 14 is slidably installed in the U-shaped frame 11, one end of the L-shaped slide rod 13 close to the first electromagnetic suction cup 12 is fixedly connected with the first slide plate 14, the first tension spring 16 is sleeved on the L-shaped slide rod 13, one end of the first tension spring 16 is fixedly connected with the rotating ring 7, and the other end is fixedly connected with the first slide plate 14, the first tension spring 16 is always in the stretched state, providing the L-shaped slide rod 13 with the pulling force towards the rotating ring 7, after the first electromagnetic suction cup 12 is de-energized, under the pulling force of the first tension spring 16, the L-shaped slide rod 13 moves towards the rock sample, making the contact wheel 21 rollingly contact the part close to the top of the outer circumferential wall of the rock sample, when the first electric motor 9 operates, the rotating ring 7 is driven to rotate, the end surface perpendicularity detection mechanism rotates along with the rotating ring 7, making the plurality of contact wheels 21 roll circumferentially around the rock sample, if the end surface of the rock sample is inclined, when the contact wheel 21 passes through the inclined position, it will no longer be in abutment with the rock sample, under the pulling force of the first tension spring 16, the L-shaped slide rod 13 further moves towards the axial direction of the rock sample.

[0039] In this embodiment, in order to give clear prompt to the detector when the tilt is detected, the first sliding plate 14 is fixedly installed with a first insulating plate, the first insulating plate is fixedly installed with a first conductive block 15, the U-shaped frame 11 is fixedly installed with a first fixed block 17, the first fixed block 17 is penetratingly and slidingly installed with a multi-angle sliding rod 18, the multi-angle sliding rod 18 is fixedly installed with a second insulating plate at one end close to the first sliding plate 14, the second insulating plate is fixedly installed with a second conductive block 20, the door-shaped frame 2 is installed with a sound-light alarm, the electrical control box is installed with an intermediate relay, the second conductive block 20 and the first conductive block 15 constitute a normally open contact, the normally open contact is connected in series in a coil power supply circuit of the intermediate relay through a wire, and a group of normally open contacts on the intermediate relay are connected in series in a power supply circuit of the sound-light alarm, in the case that the contact wheel 21 keeps abutting against the outer circumferential wall of the rock sample, the second conductive block 20 and the first conductive block 15 keep a certain distance, at this time, the coil power supply circuit of the intermediate relay is disconnected, the normally open contacts on the intermediate relay maintain a disconnected state, thus the sound-light alarm does not operate, when the contact wheel 21 passes through the inclined position of the rock sample and further moves to the axial direction thereof, the L-shaped sliding rod 13 drives the first conductive block 15 to approach the second conductive block 20, finally the two conductive blocks contact, trigger the coil of the intermediate relay to attract, and the normally open contacts on the intermediate relay also close, trigger the sound-light alarm to operate in power supply, thus give the detector a sound-light prompt, the multi-angle sliding rod 18 is sleeved with a compression spring 19, one end of the compression spring 19 is in contact with the rotating ring 7, and the other end is in contact with the second insulating plate, the compression spring 19 provides a pushing force for the second conductive block 20 towards the first conductive block 15, and ensures that the two reliably contact to conduct the circuit during detection.

[0040] In this embodiment, in order to mark the inclined part of the rock sample, facilitate the detection personnel to quickly identify and confirm, the U-shaped frame 11 is also provided with a marking assembly, the marking assembly comprises a second sliding plate 22, a second tension spring 23, a marking circular tube 24 and a second electromagnetic chuck 25, the second sliding plate 22 is slidingly installed on the inner wall of one side of the U-shaped frame 11, a fixed cylinder is fixedly installed on the second sliding plate 22, the marking circular tube 24 is fixedly installed in the fixed cylinder, one end of the marking circular tube 24 away from the second sliding plate 22 extends into the rotating ring 7, and a marking cotton 26 is fixedly installed, after the marking cotton 26 absorbs ink, it can leave ink marks in contact with the rock sample, the second electromagnetic chuck 25 is fixedly installed in the U-shaped frame 11, in the initial state, the second electromagnetic chuck 25 is in the energized operating state, the working surface thereof is attracted to the second sliding plate 22, so that the marking cotton 26 is away from the sample, a group of normally closed contacts on the intermediate relay mentioned above are connected in series in the power supply circuit of the second electromagnetic chuck 25, after the first conductive block 15 and the second conductive block 20 are in contact, the coil of the intermediate relay is triggered to attract, and the normally closed contacts on the intermediate relay are disconnected at the same time, the power supply circuit of the second electromagnetic chuck 25 is cut off, so that it is de-energized to release the second sliding plate 22, the second tension spring 23 is sleeved on the marking circular tube 24, one end of the second tension spring 23 is fixedly connected with the second sliding plate 22, and the other end is fixedly connected with the rotating ring 7, after the second sliding plate 22 is released, under the tension of the second tension spring 23, the marking circular tube 24 moves towards the axis of the rock sample, and finally the marking cotton 26 contacts the rock sample to leave marks at the inclined position.

[0041] In this embodiment, in order to facilitate the injection of ink into the marking cotton 26, the marking circular tube 24 is obliquely fixedly installed with an injection pipe 27, one end of the injection pipe 27 extends above the marking circular tube 24, one end of the injection pipe 27 in the marking circular tube 24 is in contact with the marking cotton 26, and a liquid outlet micropore is formed, ink can be injected from the upper end of the injection pipe 27 through a syringe, the injection pipe 27 is designed to be inclined, and the gravity is used to guide the ink to the liquid outlet micropore and uniformly penetrate the marking cotton 26.

[0042] In this embodiment, in order to limit the movement track of the marking circular tube 24 and avoid deviation during movement, a guide cylinder is throughly and fixedly installed on the rotating ring 7, and the marking circular tube 24 penetrates the guide cylinder and is slidingly connected with the inner wall of the guide cylinder.

[0043] In this embodiment, in order to isolate the rock sample and avoid the fragments from bouncing out after crushing, the bottom of the lifting load plate 5 is fixedly installed with an upper cover 28, the bottom of the upper cover 28 is fixedly installed with a multi-stage blocking ring 29, the multi-stage blocking ring 29 includes a plurality of nested blocking units, in any two adjacent blocking units, the inner side wall of the outer blocking unit is slidingly connected with the outer side wall of the inner blocking unit, specifically, a limiting slide is formed on the inner side wall of the outer blocking unit, a limiting slide block is arranged on the outer side wall of the inner blocking unit, the limiting slide block is located in the limiting slide and is slidingly connected with the inner wall of the limiting slide, the top of the upper cover 28 is installed with a plurality of storage release mechanisms which are rotationally symmetrically distributed, for realizing the overall storage or release of the multi-stage blocking ring 29, specifically, any one storage release mechanism includes a winding wheel 31, a lifting rope 32 and a second motor 33, the top of the upper cover 28 is fixedly installed with a support frame, the winding wheel 31 is rotatably installed in the support frame, the lifting rope 32 is wound in the winding wheel 31, a plurality of second fixed blocks 30 which are rotationally symmetrically distributed are fixedly installed on the outer wall of the innermost blocking unit and close to the bottom position, the bottom end of the lifting rope 32 is fixedly connected with the corresponding second fixed block 30, the second motor 33 drives the winding wheel 31 to rotate in a forward direction, so as to wind the lifting rope 32, the innermost blocking unit is pulled up through the second fixed block 30, and the outer blocking units are sequentially nested and stored, when the winding wheel 31 is reversed, the lifting rope 32 is released, and the blocking units are gradually unfolded under the action of gravity to form a protective barrier.

[0044] In this embodiment, in order to change the tension direction of the lifting rope 32 and avoid interference between the lifting rope 32 and other components, the storage release mechanism further includes a guide pulley 34, the guide pulley 34 is fixedly installed on the top of the upper cover 28, and the lifting rope 32 passes through the wheel groove of the guide pulley 34.

[0045] In this embodiment, in order to be able to automatically clean the crushed rock sample, the top of the work platform 1 is rotatably provided with a rotatable plate 35, the door-shaped frame 2 is fixedly installed on the top of the rotatable plate 35, the top of the rotatable plate 35 is fixedly provided with a positioning circular table, four arc-shaped positioning blocks are fixedly installed on the positioning circular table, and the rock sample is placed on the positioning circular table and between the four arc-shaped positioning blocks, so that the axis of the rock sample coincides with the axis of the pressure head 4, third hydraulic cylinders 36 are rotatably installed on the outer walls of the two sides of the work platform 1, the output ends of the two third hydraulic cylinders 36 are rotatably connected with the outer walls of the two sides of the rotatable plate 35, and the output ends of the two third hydraulic cylinders 36 are extended to push the rotatable plate 35 to rotate upward, so that the rotatable plate 35 becomes inclined, a guide chute plate 37 is fixedly installed on the work platform 1 and located at the rear position, two guide inclined plates 38 are fixedly installed on the top of the rotatable plate 35, and the broken rock sample will slide into the guide chute plate 37 along the guide inclined plates 38 under the action of gravity, and after a receiver is arranged below the guide chute plate 37, the final broken pieces will fall into the receiver.

[0046] In this embodiment:

[0047] In the initial state, the lifting carrier plate 5 is located at the upper position, and the multi-stage retaining ring 29 is in the fully stored state.

[0048] In use, the rock sample is first placed on the positioning circular table on the rotatable plate 35 and between the four arc-shaped positioning blocks, so that the axis of the rock sample coincides with the axis of the pressure head 4, and the action point of the force in the subsequent pressure is accurate.

[0049] Then the end face perpendicularity detection process is started, the lifting plate 5 is driven to descend by the two second hydraulic cylinders 6 until the lifting plate 5 is in close contact with the positioning blocks on the inner walls of the two sides of the door-shaped frame 2, at this time the end face perpendicularity detection mechanism reaches the predetermined detection position, then the first electromagnetic suction disc 12 is powered off to release the adsorption of the first sliding plate 14, after losing the retaining force, the L-shaped sliding rod 13 approaches the rock sample under the continuous pulling force of the first tension spring 16, drives the contact wheel 21 to contact the position close to the top of the outer circumferential wall of the sample, then the first motor 9 is started to run, the first motor 9 drives the second gear 10 to rotate, through the meshing transmission of the second gear 10 and the first gear 8, drives the rotating ring 7 to rotate slowly, and the rotating ring 7 drives multiple end face perpendicularity detection mechanisms to rotate correspondingly, so that multiple contact wheels 21 synchronously roll around the top edge position of the rock sample, if the end face of the rock sample is inclined, when the contact wheel 21 passes through the inclined position, it cannot be in contact with the rock sample, and under the pulling force of the first tension spring 16, the L-shaped sliding rod 13 will further move to the axial direction of the sample, the L-shaped sliding rod 13 drives the first sliding plate 14 to move, the first conductive block 15 on the first sliding plate 14 will be in contact with the second conductive block 20, which will trigger the audible and visual alarm to start and issue a prompt, in addition, the second electromagnetic suction disc 25 will be powered off and will not adsorb the second sliding plate 22, under the pulling force of the second tension spring 23, the marking circular tube 24 will move to the axial direction of the rock sample, finally, the ink-absorbed marking cotton 26 will contact the rock sample and leave a clear mark below the inclined position, the relevant detection personnel can quickly determine the inclined position according to the mark;

[0050] If the detection passes, it indicates that the end surface of the rock sample is level, and each area can be perpendicular to the axial pressure, so the axial bearing pressure detection can be carried out. Before detection, the first electromagnetic suction disc 12 is powered on, and the adsorption force generated by the working surface will attract the first sliding plate 14 to the initial position. Under the driving of the first sliding plate 14, the L-shaped sliding rod 13 and the contact wheel 21 will reset, the first conductive block 15 and the second conductive block 20 will be separated, correspondingly, the second electromagnetic suction disc 25 will restore power-on, and the second sliding plate 22 will be attracted to the initial position. Under the driving of the second sliding plate 22, the marking pipe 24 and the marking cotton 26 will also reset, and then the output end of the two second hydraulic cylinders 6 is retracted, the lifting load plate 5 is reset upward, after the reset is completed, the output shaft of the second motor 33 in the release mechanism is reversed to release the lifting rope 32, and the multi-stage blocking ring 29 will gradually expand under the action of its own gravity, and finally the bottom of the innermost blocking unit will be in contact with the top of the convertible load plate 35, forming a protective barrier, and then the first hydraulic cylinder 3 drives the pressure head 4 to move downward, the pressure head 4 passes through the upper cover 28 and enters the multi-stage blocking ring 29, and then the rock sample is subjected to axial pressure. The pressure sensor detects and feeds back the pressure value in real time until the sample is crushed. Due to the isolation effect of the multi-stage blocking ring 29, the flying of the broken pieces can be effectively prevented.

[0051] After the detection is completed, the output shaft of the second motor 33 is rotated in the forward direction to wind the lifting rope 32, so that the multi-stage blocking ring 29 can be re-stored, and then the output end of the third hydraulic cylinder 36 is extended to push the convertible load plate 35 to rotate upward to the inclined state, and the broken rock sample pieces slide into the guide chute plate 37 along the guide inclined plate 38 under the action of gravity, and finally fall into the receiver below the guide chute plate 37 to complete the automatic cleaning work.

[0052] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A rock strength testing device, comprising a working platform, a gantry frame, a first hydraulic cylinder, and a pressure head, wherein the gantry frame is mounted on the top of the working platform, the first hydraulic cylinder is fixedly mounted on the top of the gantry frame with its output end extending into the gantry frame, and the pressure head is mounted on the output end of the first hydraulic cylinder, characterized in that, A lifting platform is slidably installed inside the portal frame. Two second hydraulic cylinders are fixedly installed on the top of the portal frame. The output ends of the two second hydraulic cylinders extend into the portal frame and are fixedly connected to the lifting platform. A rotating ring is installed through and rotatably on the lifting platform. A first gear located above the lifting platform is fixedly sleeved on the outer wall of the rotating ring. A first motor is fixedly installed on the top of the lifting platform. A second gear is fixedly installed on the output end of the first motor. The second gear meshes with the first gear. Multiple end face perpendicularity detection mechanisms are installed on the rotating ring in a rotationally symmetrical distribution. These mechanisms are used to detect whether the end face of the rock sample is perpendicular to the pressure direction of the indenter. The end face perpendicularity detection mechanisms are located below the first gear. Each of the end face perpendicularity detection mechanisms includes a U-shaped frame, a first electromagnetic chuck, an L-shaped slide rod, a first tension spring, and a contact wheel. The U-shaped frame is fixedly installed on the outer wall of the rotating ring, the first electromagnetic chuck is fixedly installed on the inner wall of the U-shaped frame on the side away from the rotating ring, the L-shaped slide rod is disposed inside the U-shaped frame, the vertical section of the L-shaped slide rod is located inside the rotating ring, the contact wheel is rotatably sleeved on the bottom end of the vertical section of the L-shaped slide rod, a first sliding plate is slidably installed inside the U-shaped frame, one end of the L-shaped slide rod near the first electromagnetic chuck is fixedly connected to the first sliding plate, and a first tension spring is sleeved on the L-shaped slide rod, one end of the first tension spring is fixedly connected to the rotating ring, and the other end is fixedly connected to the first sliding plate. The U-shaped frame is also equipped with a marking assembly, which includes a second sliding plate, a second tension spring, a marking tube, and a second electromagnetic chuck. The second sliding plate is slidably mounted on the inner wall of one side of the U-shaped frame. A fixed cylinder is fixedly mounted on the second sliding plate. The marking tube is fixedly mounted inside the fixed cylinder. One end of the marking tube away from the second sliding plate extends into the rotating ring and is fixedly mounted with marking cotton. The second electromagnetic chuck is fixedly mounted inside the U-shaped frame. The working surface of the second sliding plate and the second electromagnetic chuck are attracted to each other. The second tension spring is sleeved on the marking tube. One end of the second tension spring is fixedly connected to the second sliding plate, and the other end is fixedly connected to the rotating ring.

2. The rock strength testing device according to claim 1, characterized in that, A first insulating plate is fixedly installed on the first sliding plate, and a first conductive block is fixedly installed on the first insulating plate. A first fixing block is fixedly installed inside the U-shaped frame. A polygonal slide rod is slidably installed through the first fixing block. A second insulating plate is fixedly installed at one end of the polygonal slide rod near the first sliding plate. A second conductive block is fixedly installed on the second insulating plate. A compression spring is sleeved on the polygonal slide rod. One end of the compression spring contacts the rotating ring, and the other end contacts the second insulating plate.

3. The rock strength testing device according to claim 1, characterized in that, An injection tube is fixedly installed at an angle inside the marking tube. One end of the injection tube extends above the marking tube, and the end of the injection tube inside the marking tube contacts the marking cotton and has a liquid outlet microhole.

4. The rock strength testing device according to claim 1, characterized in that, A guide cylinder is fixedly installed through the rotating ring, and the marking tube passes through the guide cylinder and is slidably connected to the inner wall of the guide cylinder.

5. The rock strength testing device according to claim 1, characterized in that, The bottom of the lifting platform is fixedly equipped with an upper cover, and the bottom of the upper cover is fixedly equipped with a multi-level retaining ring. The multi-level retaining ring includes multiple nested enclosure units. In any two adjacent enclosure units, the inner sidewall of the outer enclosure unit is slidably connected to the outer sidewall of the inner enclosure unit. The top of the upper cover is equipped with multiple rotationally symmetrical storage and release mechanisms for realizing the overall storage or release of the multi-level retaining ring.

6. The rock strength testing device according to claim 5, characterized in that, Each of the aforementioned storage and release mechanisms includes a winding reel, a lifting rope, and a second motor. A support frame is fixedly installed on the top of the upper cover. The winding reel is rotatably installed inside the support frame. The lifting rope is wound inside the winding reel. Multiple second fixing blocks that are rotationally symmetrically distributed are fixedly installed on the outer wall of the innermost enclosure unit near the bottom. The bottom end of the lifting rope is fixedly connected to the corresponding second fixing block.

7. The rock strength testing device according to claim 6, characterized in that, The storage and release mechanism also includes a guide pulley, which is fixedly installed on the top of the upper cover, and the suspension rope passes through the groove of the guide pulley.

8. The rock strength testing device according to any one of claims 1-7, characterized in that, A transferable plate is rotatably mounted on the top of the work platform, and a gantry frame is fixedly mounted on the top of the transferable plate. A third hydraulic cylinder is rotatably mounted on both outer walls of the work platform, and the output ends of the two third hydraulic cylinders are rotatably connected to the outer walls of the transferable plate. A guide trough is fixedly mounted on the work platform at the rear position, and two guide inclined plates are fixedly mounted on the top of the transferable plate.

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