Testing device and testing method for testing mechanical properties of rock

Abstract

The invention discloses a testing device and a testing method for testing rock mechanical properties, and relates to the field of rock mechanical testing devices.The testing device comprises an upper support and a lower support, guide columns are connected to the four corners of the upper support and the four corners of the lower support, and a pressure plate is movably mounted on the four guide columns; and a placing seat for placing rocks is mounted on the lower support. In the invention, after the test is finished, the detection push plates are in contact with the placement seat, the surface of the placement seat deforms to extrude any one or more detection push plates and trigger the emergency stop switch, so that the driving motor is suddenly stopped, the inaccurate test result caused by the deformation of the placement seat is avoided, the waste of the sample can be avoided, and meanwhile, the pressure plate is reset, so that the test efficiency is improved. And the reciprocating sliding rod is driven to scrape off rock disintegrating slag adhered to the bottom side of the pressure plate through the slag scraping strip, and the rock disintegrating slag falls into the storage groove, so that the purpose of automatically cleaning the pressure plate is achieved, and the accuracy of a test result is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of rock mechanics testing devices, and in particular to a testing device and a testing method for testing rock mechanical properties. Background Art

[0002] Shale gas reservoirs are typical "self-generating and self-storing" natural gas reservoirs. Gas-bearing shales have the functions of source rock, reservoir, and even cap rock. Shale gas accumulation does not need to be in the high part of the structure, and is a continuous enriched gas reservoir. The distribution of shale gas reservoirs is comparable to the distribution range of effective source rocks and is regionally distributed. Therefore, as long as large areas of thick shale with high carbon content are found, the distribution of shale gas can be roughly determined. It should be noted that the porosity and permeability of shale gas reservoirs are extremely low. The thickness of the producing layer is generally greater than 15m, the porosity is generally 4% to 6%, and the matrix permeability is between (0.001 and 1)×10 -3 μm 2 There are often natural fractures between them, which usually require special drilling technology, completion technology, and fracturing transformation technology to obtain commercial production; However, in the process of shale gas exploration, it is necessary to test the mechanical properties of the mined rocks in order to understand the inherent conditions for shale gas development. During the test, the rock sample is placed on the placement table, and the drive motor is started to drive the threaded extrusion rod downward, and the threaded extrusion rod drives the pressure plate downward to crush the rock. However, in the actual test process, due to the increase in the number of tests and the influence of the characteristics of different rocks on the placement table, the flatness of the placement table is prone to change, and the change in flatness is not easy to be detected, which in turn affects the subsequent test structure of the mechanical properties of the rock; in addition, because the pressure plate crushes the rock, the rock is very easy to stick to the pressure plate. During the test, if it is not cleaned in time, it will also affect the accuracy of the test results. The laboratory test itself has the problem of poor accuracy. Therefore, once the result is affected, the error of the test structure will be further increased. Summary of the invention

[0003] The purpose of the present invention is to provide a testing device and a testing method for testing the mechanical properties of rocks, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A testing device for testing the mechanical properties of rocks, comprising an upper support and a lower support, wherein the four corners of the upper support and the lower support are connected with guide columns, pressure plates are movably mounted on the four guide columns, a placement seat for placing rocks is mounted on the lower support, a threaded extrusion rod is movably mounted on the upper support, the pressure plate is mounted on the bottom end of the threaded extrusion rod, and a driving motor for driving the threaded extrusion rod is mounted on the upper support; It also includes an active leveling detection structure, which is installed on the lower support and is used to detect the levelness of the surroundings of the placement seat; the active leveling detection structure includes four synchronously movable brackets, which are movably installed on the surroundings of the lower support respectively, and an adapter is installed on the synchronously movable bracket, and a detection push plate is movably installed on the bottom side of the adapter, and an emergency stop switch is installed on the inner wall of the adapter, and the movement of the detection push plate is used to trigger the emergency stop switch; It also includes a reset automatic cleaning structure, which is installed on the pressure plate and is used to actively clean the bottom side of the pressure plate; the reset automatic cleaning structure includes a reciprocating slide bar, which is slidably installed on the bottom side of the pressure plate, and a scraping bar is installed on the top side of the reciprocating slide bar, and the reciprocating slide bar moves through the scraping bar to scrape rock debris on the bottom side of the pressure plate; It also includes an auxiliary lubrication structure, which is installed on the top side of the upper support and is used to actively lubricate the threaded extrusion rod; the auxiliary lubrication structure includes a protection box, which is installed on the top side of the upper support, and a plurality of oil nozzles are installed on the inner wall of the protection box, and both sides of the protection box are hollow and have lubricating oil bags placed thereon, the lubricating oil bags are connected to the plurality of oil nozzles, and the lubricating oil in the lubricating oil bags is sprayed onto the threaded extrusion rod through the plurality of oil nozzles.

[0005] Furthermore, in a preferred embodiment of the present invention, the active leveling detection structure further comprises four downward-pressing transverse pushing plates, and the four downward-pressing transverse pushing plates are respectively mounted on the four synchronously movable brackets; Two lower pressure frames are movably mounted on the lower support, and extrusion rings are mounted on the two lower pressure frames. Two downward pressure rods are mounted on the bottom side of the pressure plate, and the pressure plate moves by squeezing the two lower pressure frames through the two downward pressure rods.

[0006] Further, in a preferred embodiment of the present invention, two lower pressing grooves are provided on the top side of the lower support, the two lower pressing frames are movably installed in the two lower pressing grooves respectively, a rebound spring is installed on the bottom side of the lower pressing frame, and the bottom end of the rebound spring is installed on the bottom inner wall of the lower pressing groove; The lower support is provided with transverse grooves all around, and the four synchronous movable brackets are equipped with transverse tie rods, which are respectively slidably installed in the four transverse grooves. Transverse pull springs are installed on the inner walls of the transverse grooves, and the other ends of the transverse pull springs are installed on the transverse tie rods.

[0007] Furthermore, in a preferred embodiment of the present invention, two buffer springs are installed on one side of the detection push plate, and the other end of the buffer spring is installed on the inner wall of the adapter.

[0008] Further, in a preferred embodiment of the present invention, the reset automatic cleaning structure further comprises a rotating push-pull rod, and the rotating push-pull rod is rotatably mounted on the bottom side of the pressure plate; A driving groove is provided on the bottom side of the reciprocating slide rod, and a driving shaft is rotatably mounted on the rotating push-pull rod, and the driving shaft is movably mounted in the driving groove.

[0009] Further, in a preferred embodiment of the present invention, a synchronous rotating rod is rotatably mounted on the pressure plate, the bottom end of the synchronous rotating rod is mounted on the rotating push-pull rod, a driving gear is mounted on the top end of the synchronous rotating rod, a driving tooth plate is slidably mounted on the top side of the pressure plate, and the driving tooth plate is meshed with the driving gear; A driving rod is movably mounted on the pressure plate, a linkage rod is rotatably mounted between the driving rod and the driving toothed plate, two linkage shafts are rotatably mounted on the linkage rod, and the two linkage shafts are respectively mounted on the driving toothed plate and the driving rod; A return spring is mounted on the driving rod, and the bottom end of the return spring is mounted on the top side of the pressure plate.

[0010] Furthermore, in a preferred embodiment of the present invention, two receiving grooves are provided on the reciprocating slide bar, and the receiving grooves are used to collect rock debris; Two limiting slide plates are installed on the reciprocating slide rod, and two sliding grooves are provided on the bottom side of the pressure plate. The two limiting slide plates are respectively slidably installed in the two sliding grooves.

[0011] Furthermore, in a preferred embodiment of the present invention, the auxiliary lubrication structure further comprises two oil pushing plates, both of which are movably mounted in the protection box, and the oil pushing plates are moved to squeeze the lubricating oil bag; Two oil pushing rods are installed on the oil pushing plate, and the two oil pushing rods are movably installed on the protection box. The two oil pushing rods are connected with a push-pull plate, and an arc seat is installed on one side of the push-pull plate; Pushing brackets are installed on both sides of the pressure plate. The movement of the pressure plate drives the two pushing brackets to squeeze the two arc seats, which are used to drive the two push-pull plates to move.

[0012] Furthermore, in a preferred embodiment of the present invention, a return spring is sleeved on the oil pushing rod, one end of the return spring is mounted on the protection box, and the other end of the return spring is mounted on the push-pull plate; A sheath is installed on one side of the push-pull plate, the other side of the sheath is installed on the protection box, and the return spring is located in the sheath.

[0013] A test method for testing rock mechanical properties, which is carried out according to the above-mentioned test device for testing rock mechanical properties, comprises the following steps: S1, the driving motor starts, and drives the pressure plate to reset through the threaded extrusion rod, so that the pressure plate no longer squeezes the two downward pressure rods, and the lower pressure frame drives the extrusion ring to reset, and pulls the multiple synchronous moving brackets to reset under the pull-back force of multiple horizontal pulling springs; S2, the synchronous moving bracket is reset, and the detection push plate is driven to contact the placement seat through the adapter seat. When the surface of the placement seat is deformed, any one or more detection push plates are squeezed to retract, and the buffer spring is driven to be stressed, and the emergency stop switch is triggered at the same time, so that the drive motor stops suddenly; S3, when the pressure plate is reset, the driving rod is squeezed, the driving rod moves on the pressure plate, and the driving rod moves through the linkage rod to drive the driving toothed plate to move, so that the driving toothed plate drives the driving gear to rotate, and the driving gear drives the rotating push-pull rod to rotate through the synchronous rotating rod, so that the rotating push-pull rod drives the reciprocating slide rod to move through the driving shaft, and then the reciprocating slide rod scrapes off the rock debris adhered to the bottom side of the pressure plate through the scraping bar; S4, the pressure plate is reset, driving the two push brackets to squeeze the two arc seats to move, so that the arc seats drive the push-pull plate to move, and the push-pull plate drives the oil push plate to move through the two oil push rods, and then the oil push plate squeezes the lubricating oil bag, and then the lubricating oil in the lubricating oil bag is squeezed out through the oil outlet nozzle and sprayed on the threaded extrusion rod.

[0014] The beneficial effects of a testing device and a testing method for testing rock mechanical properties proposed by the present invention are: In the present invention, by setting an active leveling detection structure, when the pressure plate moves up after the test is completed, so that the downward pressure rod is separated from the lower pressure frame, during the resetting process of the synchronous moving bracket, the detection push plate is driven to contact the placement seat through the adapter seat. If the surface of the placement seat is deformed, it will squeeze any one or more detection push plates to retract, and drive the buffer spring to be stressed, and at the same time trigger the emergency stop switch to make the drive motor stop urgently, so as to avoid inaccurate test results due to the deformation of the placement seat and avoid waste of samples.

[0015] Furthermore, in the present invention, by setting up a reset automatic cleaning structure, when the test is completed and the pressure plate is reset, the driving rod is squeezed, thereby driving the reciprocating slide rod to move, and at the same time the reciprocating slide rod slides horizontally in two sliding grooves through two limiting slides, so that the reciprocating slide rod scrapes off the rock debris adhered to the bottom side of the pressure plate through the scraping bar, and drops it into the receiving groove, thereby achieving the purpose of automatically cleaning the pressure plate.

[0016] Furthermore, in the present invention, through the setting of the auxiliary lubrication structure, when the pressure plate is reset, the two pushing brackets are driven to squeeze the two arc-shaped seats to move, so that the arc-shaped seats drive the push-pull plate to move, and the push-pull plate drives the push-oil plate to move through the two oil push rods, and at the same time drives the return spring to be stressed, so that the push-oil plate squeezes the lubricating oil bag, and then the lubricating oil in the lubricating oil bag is squeezed out through the oil outlet nozzle and sprayed on the threaded extrusion rod, completing the automatic spraying of the lubricating oil, and when the pressure plate continues to move upward, the pushing bracket is separated from the arc-shaped seat, and under the rebound force of the return spring, the push-pull plate drives the push-oil plate to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a testing device for testing the mechanical properties of rocks provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the connection between an adapter and a detection push plate and other structures of a test device for testing rock mechanical properties provided by an embodiment of the present invention; Figure 3 A schematic diagram of a partial cross-sectional structure of a test device for testing rock mechanical properties provided by an embodiment of the present invention, wherein an adapter and a detection push plate tube and other structures are connected; Figure 4 A schematic diagram of a partial cross-sectional structure of a test device for testing rock mechanical properties provided by an embodiment of the present invention, wherein a support and a synchronous movable bracket and other structures are connected; Figure 5 A schematic diagram of a partial cross-sectional structure of a test device for testing rock mechanical properties provided by an embodiment of the present invention, wherein a lower support and a lower pressure frame and other structures are connected; Figure 6 A schematic diagram of the structure of the connection between a reciprocating slide rod and a scraping bar and other structures of a testing device for testing rock mechanical properties provided by an embodiment of the present invention; Figure 7 A schematic diagram of a partial structure of a test device for testing rock mechanical properties provided by an embodiment of the present invention, wherein a synchronous rotating rod and a rotating push-pull rod and other structures are connected; Figure 8 A schematic diagram of the structure of a test device for testing rock mechanical properties provided by an embodiment of the present invention, in which a downward pressure rod and a protection box and other structures are connected; Fig. 9 A testing device for testing rock mechanical properties provided by an embodiment of the present invention Figure 8 The structural diagram of part A in the figure; Fig.10 A partial cross-sectional structural schematic diagram of the connection between an oil push rod and a push-pull plate and other structures of a test device for testing rock mechanical properties provided by an embodiment of the present invention.

[0018] In the figure: 1-upper support; 2-lower support; 3-pressure plate; 4-placing seat; 5-threaded extrusion rod; 6-active leveling detection structure; 601-synchronous moving bracket; 602-adapter seat; 603-detection push plate; 604-emergency stop switch; 605-buffer spring; 606-horizontal pull groove; 607-horizontal pull rod; 608-horizontal pull spring; 609-downward pressure push plate; 610-extrusion ring; 611-downward pressure frame; 612-downward pressure groove; 613-rebound spring; 614-downward pressure rod; 7-reset automatic cleaning structure; 701-reciprocating slide rod; 702-scraping strip; 703-storage slot; 7 04-limiting slide plate; 705-sliding groove; 706-synchronous rotating rod; 707-rotating push-pull rod; 708-driving groove; 709-driving shaft; 710-driving gear; 711-driving gear plate; 712-driving rod; 713-linkage rod; 714-linkage shaft; 715-reset spring; 8-auxiliary lubrication structure; 801-protection box; 802-lubricating oil bag; 803-oil outlet nozzle; 804-push oil plate; 805-push oil rod; 806-push-pull plate; 807-return spring; 808-sheath; 809-arc seat; 810-pushing bracket; 9-guide column; 10-driving motor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In addition, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical", "perpendicular" and the like do not mean that the components are required to be absolutely vertical, but can be slightly tilted. For example, "vertical" only means that its direction is more vertical than "horizontal", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Please refer to the attached manual Figure 1 -Attached Fig.10 A testing device for testing the mechanical properties of rocks provided by an embodiment of the present invention comprises an upper support 1 and a lower support 2, wherein the four corners of the upper support 1 and the lower support 2 are connected with guide columns 9, pressure plates 3 are movably mounted on the four guide columns 9, a placement seat 4 for placing rocks is mounted on the lower support 2, a threaded extrusion rod 5 is movably mounted on the upper support 1, the pressure plate 3 is mounted on the bottom end of the threaded extrusion rod 5, and a driving motor 10 for driving the threaded extrusion rod 5 is mounted on the upper support 1.

[0026] For further information, please refer to the attached manual. Figure 2 -Attached Figure 5A testing device for testing the mechanical properties of rocks provided by an embodiment of the present invention also includes an active leveling detection structure 6, which is installed on the lower support 2 and is used to detect the flatness of the surroundings of the placement seat 4; the active leveling detection structure 6 includes four synchronous moving brackets 601, which are movably installed on the surroundings of the lower support 2, and an adapter seat 602 is installed on the synchronous moving bracket 601. A detection push plate 603 is movably installed on the bottom side of the adapter seat 602, and an emergency stop switch 604 is installed on the inner wall of the adapter seat 602. The movement of the detection push plate 603 is used to trigger the emergency stop switch 604. It should be noted that, in the embodiment of the present invention, when the test is completed and the pressure plate 3 is reset and moved upward, the four synchronously movable brackets 601 are reset synchronously, and the detection push plate 603 is driven to contact the placement seat 4 through the adapter seat 602. If the surface of the placement seat 4 is deformed, it will squeeze any one or more of the detection push plates 603 to retract, and drive the buffer spring 605 to be subjected to force, and at the same time trigger the emergency stop switch 604, causing the drive motor 10 to stop urgently, thereby achieving the purpose of automatically detecting the upper surface of the placement seat 4.

[0027] More specifically, in the embodiment of the present invention, a reset automatic cleaning structure 7 is also included, which is installed on the pressure plate 3. The reset automatic cleaning structure 7 is used to actively clean the bottom side of the pressure plate 3; the reset automatic cleaning structure 7 includes a reciprocating slide bar 701, which is slidably installed on the bottom side of the pressure plate 3, and a scraping bar 702 is installed on the top side of the reciprocating slide bar 701. The reciprocating slide bar 701 moves to scrape the rock debris on the bottom side of the pressure plate 3 through the scraping bar 702. It should be noted that in the embodiment of the present invention, after the test is completed and the pressure plate 3 is reset, the reciprocating slide bar 701 reciprocates, so that the scraping bar 702 scrapes the rock debris adhered to the bottom side of the pressure plate 3 and falls into the storage groove 703, thereby achieving the purpose of automatically cleaning the pressure plate 3.

[0028] More specifically, in the embodiment of the present invention, an auxiliary lubrication structure 8 is also included. The auxiliary lubrication structure 8 is installed on the top side of the upper support 1. The auxiliary lubrication structure 8 is used to actively lubricate the threaded extrusion rod 5. The auxiliary lubrication structure 8 includes a protection box 801. The protection box 801 is installed on the top side of the upper support 1. A plurality of oil nozzles 803 are installed on the inner wall of the protection box 801. Both sides of the protection box 801 are hollow and have lubricating oil bags 802 placed thereon. The lubricating oil bags 802 are connected to the plurality of oil nozzles 803. The lubricating oil in the lubricating oil bags 802 is sprayed onto the threaded extrusion rod 5 through the plurality of oil nozzles 803. It should be noted that in the embodiment of the present invention, when the pressure plate 3 is reset, the lubricating oil in the lubricating oil bags 802 is squeezed out through the oil nozzles 803 and sprayed onto the threaded extrusion rod 5, completing the automatic spraying of the lubricating oil and achieving the purpose of actively lubricating the threaded extrusion rod 5.

[0029] Please continue to refer to the instruction manual Figure 2 -Attached Figure 5 , further, in a testing device for testing the mechanical properties of rocks provided by an embodiment of the present invention, the active leveling detection structure 6 further includes four downward-pressing transverse push plates 609, and the four downward-pressing transverse push plates 609 are respectively mounted on four synchronously movable brackets 601; In addition, two lower pressure frames 611 are movably installed on the lower support 2, and the two lower pressure frames 611 are installed with extrusion rings 610. Two downward pressure rods 614 are installed on the bottom side of the pressure plate 3. The pressure plate 3 moves by squeezing the two lower pressure frames 611 through the two downward pressure rods 614. It should be noted that in the embodiment of the present invention, when the pressure plate 3 moves downward, the pressure plate 3 squeezes the two lower pressure frames 611 through the two downward pressure rods 614, and the lower pressure frames 611 move through the extrusion ring 610 to drive the four downward pressure horizontal push plates 609 to move, and then drive the four synchronous moving brackets 601 to move. The synchronous moving bracket 601 moves in the horizontal pull groove 606 through the horizontal pull rod 607, and drives the horizontal pull spring 608 to be stressed, so as to achieve the purpose of the synchronous moving bracket 601 driving the detection push plate 603 to separate from the placement seat 4 through the adapter seat 602, and ensure the normal progress of the test work.

[0030] More specifically, in the embodiment of the present invention, two lower pressing grooves 612 are provided on the top side of the lower support 2, and two lower pressing frames 611 are movably installed in the two lower pressing grooves 612 respectively. A rebound spring 613 is installed on the bottom side of the lower pressing frame 611, and the bottom end of the rebound spring 613 is installed on the bottom inner wall of the lower pressing groove 612; In addition, transverse grooves 606 are provided around the lower support 2, and transverse tie rods 607 are installed on the four synchronous movable brackets 601. The four transverse tie rods 607 are respectively slidably installed in the four transverse grooves 606, and transverse springs 608 are installed on the inner walls of the transverse grooves 606. The other end of the transverse spring 608 is installed on the transverse tie rod 607. It should be noted that in the embodiment of the present invention, when the lower pressing frame 611 is squeezed, it moves in the lower pressing groove 612, and the rebound spring 613 is stressed. When the synchronous movable bracket 601 moves, it moves in the transverse groove 606 through the transverse tie rod 607, and drives the transverse tie spring 608 to be stressed. Therefore, the reaction force of the rebound spring 613 and the transverse pull spring 608 can help the lower pressing frame 611 and the transverse tie rod 607 to reset.

[0031] Please continue to refer to the instruction manual Figure 2 -Attached Figure 5More specifically, in the embodiment of the present invention, two buffer springs 605 are installed on one side of the detection push plate 603, and the other end of the buffer spring 605 is installed on the inner wall of the adapter 602. It should be noted that in the embodiment of the present invention, the buffer spring 605 can help the detection push plate 603 to reset.

[0032] For further information, please refer to the attached manual. Figure 6 -Attached Figure 7 In the test device for testing the mechanical properties of rocks provided by the embodiment of the present invention, the reset automatic cleaning structure 7 further includes a rotating push-pull rod 707, which is rotatably mounted on the bottom side of the pressure plate 3; in addition, a driving groove 708 is provided on the bottom side of the reciprocating slide 701, and a driving shaft 709 is rotatably mounted on the rotating push-pull rod 707, and the driving shaft 709 is movably mounted in the driving groove 708. It should be noted that in the embodiment of the present invention, when the rotating push-pull rod 707 drives the reciprocating slide 701 to move through the driving shaft 709, the driving shaft 709 simultaneously slides in the driving groove 708 to realize the lateral movement of the reciprocating slide 701.

[0033] Please continue to refer to the instruction manual Figure 6 -Attached Figure 7 , further specifically, in the embodiment of the present invention, a synchronous rotating rod 706 is rotatably installed on the pressure plate 3, the bottom end of the synchronous rotating rod 706 is installed on the rotating push-pull rod 707, and a driving gear 710 is installed on the top of the synchronous rotating rod 706. A driving tooth plate 711 is slidably installed on the top side of the pressure plate 3, and the driving tooth plate 711 is meshed with the driving gear 710; in addition, a driving rod 712 is movably installed on the pressure plate 3, and a linkage rod 713 is rotatably installed between the driving rod 712 and the driving tooth plate 711, and two linkage shafts 714 are rotatably installed on the linkage rod 713, and the two linkage shafts 714 are respectively installed on the driving tooth plate 711 and the driving rod 712; In addition, a reset spring 715 is installed on the driving rod 712, and the bottom end of the reset spring 715 is installed on the top side of the pressure plate 3. It should be noted that in the embodiment of the present invention, when the pressure plate 3 is reset, the driving rod 712 is squeezed and drives the reset spring 715 to be stressed, the driving rod 712 moves through a linkage shaft 714 to drive the linkage rod 713 to move, and the linkage rod 713 drives the driving gear plate 711 to move through another linkage shaft 714, so that the driving gear plate 711 drives the driving gear 710 to rotate, and the driving gear 710 drives the rotating push-pull rod 707 to rotate through the synchronous rotating rod 706, so that the rotating push-pull rod 707 drives the reciprocating slide rod 701 to move through the driving shaft 709, and then the reciprocating slide rod 701 scrapes off the rock debris bonded to the bottom side of the pressure plate 3 through the scraping bar 702, so as to achieve the purpose of automatically cleaning the pressure plate 3.

[0034] More specifically, in the embodiment of the present invention, two receiving grooves 703 are provided on the reciprocating slide bar 701, and the receiving grooves 703 are used to collect rock debris; in addition, two limiting slide plates 704 are installed on the reciprocating slide bar 701, and two sliding grooves 705 are provided on the bottom side of the pressure plate 3, and the two limiting slide plates 704 are respectively slidably installed in the two sliding grooves 705. It should be noted that, in the embodiment of the present invention, the reciprocating slide bar 701 slides horizontally in the two sliding grooves 705 through the two limiting slide plates 704, and the reciprocating slide bar 701 collects rock debris through the two receiving grooves 703.

[0035] Please refer to the instruction manual Figure 8 -Attached Fig.10 , further, in a test device for testing the mechanical properties of rocks provided by an embodiment of the present invention, the auxiliary lubrication structure 8 also includes two oil pushing plates 804, both of which are movably installed in the protection box 801, and the oil pushing plates 804 are moved to squeeze the lubricating oil bag 802; two oil pushing rods 805 are installed on the oil pushing plate 804, both of which are movably installed on the protection box 801, and the two oil pushing rods 805 are connected to a push-pull plate 806, and an arc seat 809 is installed on one side of the push-pull plate 806; In addition, push brackets 810 are installed on both sides of the pressure plate 3. The movement of the pressure plate 3 drives the two push brackets 810 to squeeze the two arc seats 809, which are used to drive the two push-pull plates 806 to move. It should be noted that in the embodiment of the present invention, when the pressure plate 3 is reset, the two push brackets 810 are driven to squeeze the two arc seats 809 to move, so that the arc seats 809 drive the push-pull plates 806 to move, and then the push-pull plates 806 drive the push-pull plates 804 to move and squeeze the lubricating oil bag 802 through the two oil push rods 805, and at the same time drive the return spring 807 to be stressed, and then the lubricating oil in the lubricating oil bag 802 is squeezed out through the oil outlet nozzle 803 and sprayed on the threaded extrusion rod 5, so as to achieve the purpose of automatic lubrication.

[0036] More specifically, in the embodiment of the present invention, a return spring 807 is sleeved on the oil push rod 805, one end of the return spring 807 is mounted on the protection box 801, and the other end of the return spring 807 is mounted on the push-pull plate 806; in addition, a sheath 808 is installed on one side of the push-pull plate 806, the other side of the sheath 808 is installed on the protection box 801, and the return spring 807 is located in the sheath 808. It should be noted that in the embodiment of the present invention, when the push-pull plate 806 is squeezed and moved, the two oil push rods 805 are driven to move, and the two return springs 807 are stressed, so the push-pull plate 806 can be reset under the rebound force of the two return springs 807, and the return spring 807 can be prevented from rusting by the setting of the sheath 808.

[0037] In summary, the working principle of a testing device for testing rock mechanical properties provided by an embodiment of the present invention, that is, the testing method using the testing device of the embodiment of the present invention is: During the test, the rock is placed on the placement seat 4, and the driving motor 10 is started. When the threaded extrusion rod 5 is driven to move downward, the threaded extrusion rod 5 drives the pressure plate 3 to move downward. The pressure plate 3 moves downward and squeezes the two lower pressure frames 611 through the two downward pressure rods 614, so that the lower pressure frames 611 move in the lower pressure grooves 612 and the rebound springs 613 are stressed. The lower pressure frames 611 move through the extrusion ring 610 to drive the four downward pressure transverse push plates 609 to move, and then drive the four synchronous moving brackets 601 to move. The synchronous moving brackets 601 move in the transverse pull grooves 606 through the transverse pull rods 607 and drive the transverse pull springs 608 to be stressed. The step moving bracket 601 drives the detection push plate 603 to separate from the placement seat 4 through the adapter seat 602; similarly, when the pressure plate 3 moves up and the downward pressure rod 614 separates from the lower pressure bracket 611, during the resetting process of the synchronous moving bracket 601, the detection push plate 603 is driven to contact the placement seat 4 through the adapter seat 602. If the surface of the placement seat 4 is deformed, it will squeeze any one or more detection push plates 603 to retract, and drive the buffer spring 605 to be stressed, and trigger the emergency stop switch 604, so that the drive motor 10 stops suddenly, avoiding inaccurate test results due to the deformation of the placement seat 4, and avoiding waste of samples. Furthermore, after the test is completed and the pressure plate 3 is reset, the driving rod 712 is squeezed, the driving rod 712 moves on the pressure plate 3, and drives the reset spring 715 to be stressed. The driving rod 712 moves through a linkage shaft 714 to drive the linkage rod 713 to move. The linkage rod 713 drives the driving tooth plate 711 to move through another linkage shaft 714, so that the driving tooth plate 711 drives the driving gear 710 to rotate, and the driving gear 710 drives the rotating push-pull rod 707 to rotate through the synchronous rotating rod 706, so that the rotating push-pull rod 707 drives the reciprocating slide bar 701 to move through the driving shaft 709, and the driving shaft 709 slides in the driving groove 708, and the reciprocating slide bar 701 slides horizontally in the two sliding grooves 705 through the two limiting slide plates 704, so that the reciprocating slide bar 701 scrapes off the rock debris adhered to the bottom side of the pressure plate 3 through the scraping strip 702, and the rock debris falls into the receiving groove 703, so as to automatically clean the pressure plate 3. Furthermore, when the pressure plate 3 is reset, the two pushing brackets 810 are driven to squeeze the two arc seats 809 to move, so that the arc seats 809 drive the push-pull plate 806 to move, and the push-pull plate 806 drives the push-oil plate 804 to move through the two oil push rods 805, and at the same time drives the return spring 807 to be subjected to force, so that the push-oil plate 804 squeezes the lubricating oil bag 802, and then the lubricating oil in the lubricating oil bag 802 is squeezed out through the oil outlet nozzle 803 and sprayed on the threaded extrusion rod 5, completing the automatic spraying of the lubricating oil; in addition, when the pressure plate 3 continues to move upward, the pushing bracket 810 is separated from the arc seat 809, and under the rebound force of the return spring 807, the push-pull plate 806 drives the push-oil plate 804 to reset.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A testing device for testing rock mechanical properties, characterized in that: It comprises an upper support and a lower support, wherein the four corners of the upper support and the lower support are connected with guide columns, pressure plates are movably mounted on the four guide columns, a placement seat for placing rocks is mounted on the lower support, a threaded extrusion rod is movably mounted on the upper support, the pressure plate is mounted on the bottom end of the threaded extrusion rod, and a driving motor for driving the threaded extrusion rod is mounted on the upper support; It also includes an active leveling detection structure, which is installed on the lower support and is used to detect the levelness of the surrounding area of ​​the placement seat; The active leveling detection structure includes four synchronous movable brackets, which are movably mounted around the lower support respectively, and an adapter is mounted on the synchronous movable bracket. A detection push plate is movably mounted on the bottom side of the adapter, and an emergency stop switch is mounted on the inner wall of the adapter. The movement of the detection push plate is used to trigger the emergency stop switch. It also includes a reset automatic cleaning structure, which is installed on the pressure plate and is used to actively clean the bottom side of the pressure plate; the reset automatic cleaning structure includes a reciprocating slide bar, which is slidably installed on the bottom side of the pressure plate, and a scraping bar is installed on the top side of the reciprocating slide bar, and the reciprocating slide bar moves through the scraping bar to scrape rock debris on the bottom side of the pressure plate; It also includes an auxiliary lubrication structure, which is installed on the top side of the upper support and is used to actively lubricate the threaded extrusion rod; the auxiliary lubrication structure includes a protection box, which is installed on the top side of the upper support, and a plurality of oil nozzles are installed on the inner wall of the protection box, and both sides of the protection box are hollow and have lubricating oil bags placed thereon, the lubricating oil bags are connected to the plurality of oil nozzles, and the lubricating oil in the lubricating oil bags is sprayed onto the threaded extrusion rod through the plurality of oil nozzles.

2. A testing device for testing rock mechanical properties according to claim 1, characterized in that: The active leveling detection structure further includes four downward pressing and lateral pushing plates, which are respectively mounted on the four synchronously movable brackets; Two lower pressure frames are movably mounted on the lower support, and extrusion rings are mounted on the two lower pressure frames. Two downward pressure rods are mounted on the bottom side of the pressure plate, and the pressure plate moves by squeezing the two lower pressure frames through the two downward pressure rods.

3. A testing device for testing rock mechanical properties according to claim 2, characterized in that: Two lower pressing grooves are provided on the top side of the lower support, and the two lower pressing frames are movably installed in the two lower pressing grooves respectively. A rebound spring is installed on the bottom side of the lower pressing frame, and the bottom end of the rebound spring is installed on the bottom inner wall of the lower pressing groove; The lower support is provided with transverse grooves all around, and the four synchronous movable brackets are equipped with transverse tie rods, which are respectively slidably installed in the four transverse grooves. Transverse pull springs are installed on the inner walls of the transverse grooves, and the other ends of the transverse pull springs are installed on the transverse tie rods.

4. A testing device for testing rock mechanical properties according to claim 3, characterized in that: Two buffer springs are installed on one side of the detection push plate, and the other end of the buffer spring is installed on the inner wall of the adapter seat.

5. A testing device for testing rock mechanical properties according to claim 1, characterized in that: The reset automatic cleaning structure further comprises a rotating push-pull rod, which is rotatably mounted on the bottom side of the pressure plate; A driving groove is provided on the bottom side of the reciprocating slide rod, and a driving shaft is rotatably mounted on the rotating push-pull rod, and the driving shaft is movably mounted in the driving groove.

6. A testing device for testing rock mechanical properties according to claim 5, characterized in that: A synchronous rotating rod is rotatably mounted on the pressure plate, the bottom end of the synchronous rotating rod is mounted on the rotating push-pull rod, a driving gear is mounted on the top end of the synchronous rotating rod, a driving tooth plate is slidably mounted on the top side of the pressure plate, and the driving tooth plate is meshed with the driving gear; A driving rod is movably mounted on the pressure plate, a linkage rod is rotatably mounted between the driving rod and the driving toothed plate, two linkage shafts are rotatably mounted on the linkage rod, and the two linkage shafts are respectively mounted on the driving toothed plate and the driving rod; A return spring is mounted on the driving rod, and the bottom end of the return spring is mounted on the top side of the pressure plate.

7. A testing device for testing rock mechanical properties according to claim 6, characterized in that: The reciprocating slide bar is provided with two receiving grooves, and the receiving grooves are used to collect rock debris; Two limiting slide plates are installed on the reciprocating slide rod, and two sliding grooves are provided on the bottom side of the pressure plate. The two limiting slide plates are respectively slidably installed in the two sliding grooves.

8. A testing device for testing rock mechanical properties according to claim 1, characterized in that: The auxiliary lubrication structure further comprises two oil pushing plates, both of which are movably mounted in the protection box, and the oil pushing plates are moved to squeeze the lubricating oil bag; Two oil pushing rods are installed on the oil pushing plate, and the two oil pushing rods are movably installed on the protection box. The two oil pushing rods are connected with a push-pull plate, and an arc seat is installed on one side of the push-pull plate; Pushing brackets are installed on both sides of the pressure plate. The movement of the pressure plate drives the two pushing brackets to squeeze the two arc seats, which are used to drive the two push-pull plates to move.

9. A testing device for testing rock mechanical properties according to claim 8, characterized in that: A return spring is sleeved on the oil pushing rod, one end of the return spring is mounted on the protection box, and the other end of the return spring is mounted on the push-pull plate; A sheath is installed on one side of the push-pull plate, the other side of the sheath is installed on the protection box, and the return spring is located in the sheath.

10. A test method for testing rock mechanical properties, which is carried out according to a test device for testing rock mechanical properties according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the driving motor starts, and drives the pressure plate to reset through the threaded extrusion rod, so that the pressure plate no longer squeezes the two downward pressure rods, and the lower pressure frame drives the extrusion ring to reset, and pulls the multiple synchronous moving brackets to reset under the pull-back force of multiple horizontal tension springs; S2, the synchronous moving bracket is reset, and the detection push plate is driven to contact the placement seat through the adapter seat. When the surface of the placement seat is deformed, any one or more detection push plates are squeezed to retract, and the buffer spring is driven to be stressed, and the emergency stop switch is triggered at the same time, so that the drive motor stops suddenly; S3, when the pressure plate is reset, the driving rod is squeezed, the driving rod moves on the pressure plate, and the driving rod moves through the linkage rod to drive the driving toothed plate to move, so that the driving toothed plate drives the driving gear to rotate, and the driving gear drives the rotating push-pull rod to rotate through the synchronous rotating rod, so that the rotating push-pull rod drives the reciprocating slide rod to move through the driving shaft, and then the reciprocating slide rod scrapes off the rock debris adhered to the bottom side of the pressure plate through the scraping bar; S4, the pressure plate is reset, driving the two push brackets to squeeze the two arc seats to move, so that the arc seats drive the push-pull plate to move, and the push-pull plate drives the oil push plate to move through the two oil push rods, and then the oil push plate squeezes the lubricating oil bag, and then the lubricating oil in the lubricating oil bag is squeezed out through the oil outlet nozzle and sprayed on the threaded extrusion rod.

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