Compression test device for coal gangue regenerated mixture

Abstract

The utility model relates to a compression test device for a coal gangue regenerated mixture, which comprises a test bed and a press fixedly erected on the test bed, the test bed is provided with a hollow cavity, a motor and a speed reducer are fixedly erected at the bottom of the test bed, and an output shaft of the motor is coaxially and fixedly connected with an input shaft of the speed reducer. An output shaft of the speed reducer extends upwards into the cavity and is coaxially and fixedly sleeved with a driving bevel gear, screws are horizontally and rotationally arranged on the four side walls of the cavity, the ends, close to the driving bevel gear, of the screws are fixedly sleeved with driven bevel gears perpendicularly meshed with the driving bevel gear, and the screws are sleeved with nuts in a threaded mode. The top of the nut is vertically and fixedly provided with a moving rod, the top of the test bench corresponding to the moving rod is provided with a guide groove communicated with the cavity, the moving rod extends to the upper part of the test bench through the corresponding guide groove, and the upper part of one side, close to the driving bevel gear, of the moving rod is fixedly connected with a positioning block. According to the utility model, the test piece can be quickly and automatically centered and effectively shielded and protected during a test, and the device is more practical.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of compression test, specifically relates to a kind of coal gangue regeneration mixture's compression test device. BACKGROUND

[0002] Currently, good asphalt regeneration mixture can be successfully prepared using coal gangue, and is used for pavement construction, which is of great significance to improve road construction quality and reduce construction cost. However, in the study of the proportioning of coal gangue regeneration mixture, it is usually necessary to first prepare test pieces of different proportions of regeneration mixture, and then perform unconfined compression and splitting tests on the test pieces. In the unconfined compression test of the test pieces, the test pieces are usually cylindrical, and axial pressure needs to be applied to the test pieces without lateral restriction until a fracture surface mark appears on the side of the test piece. At this time, the pressure is the unconfined compressive strength of the test piece. However, in the actual test process, the test piece can only be placed in the approximate position below the pressure applying component by manual operation, and it is not possible to accurately center the test piece with the pressure applying component. Therefore, it is necessary to align the test piece with the pressure applying component through centering marking and other operations, which is not simple and quick, and is not conducive to the subsequent compression test. Moreover, there is a problem of flying debris generated by the fracture during the test, and the operation safety is not high, which needs to be improved. SUMMARY

[0003] Therefore, the purpose of the utility model is to provide a coal gangue regeneration mixture compression test device, which can realize rapid automatic centering of the test piece and effective shielding and protection during the test, to solve the above problems.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a coal gangue regeneration mixture compression test device, comprising a test table and a press fixed on the test table, wherein the test table is hollow and has a cavity, the bottom of the test table is fixed with a motor and a speed reducer, the output shaft of the motor is coaxially fixedly connected with the input shaft of the speed reducer, the output shaft of the speed reducer extends upward into the cavity and coaxially fixedly sleeved with a driving bevel gear, the four side walls of the cavity are each horizontally and rotatably provided with a screw rod, one end of each screw rod near the driving bevel gear is fixedly sleeved with a driven bevel gear perpendicular to the driving bevel gear, and each screw rod is threadedly sleeved with a nut, the top of each nut is vertically fixed with a moving rod, the top of the test table is provided with a guide groove in communication with the cavity, the moving rod extends out of the test table through the corresponding guide groove and is fixedly connected with a positioning block on the upper part of the side near the driving bevel gear, the telescopic rod of the press is coaxially arranged with the output shaft of the speed reducer and is coaxially fixedly connected with a pressure head downward, the top of the press is vertically fixed with an electric push rod, the telescopic end of the electric push rod faces upward and is detachably connected with a transparent protective cover, and the protective cover is sleeved outside the press and abuts against the top of the test table at the bottom end.

[0005] Preferably, the movable rod is adapted to the guide groove.

[0006] Preferably, a support base is fixedly connected to the top of the telescopic end of the electric push rod. A double-rod hydraulic cylinder is built into the support base. The two piston rods of the double-rod hydraulic cylinder can extend out of the support base. An installation box is fixedly provided on the inner top of the protective cover. Blind holes are provided on the left and right inner side walls of the installation box. The installation box is fitted onto the support base. The two piston rods of the double-rod hydraulic cylinder correspond one-to-one with the two blind holes and are inserted into them.

[0007] Preferably, the support base is adapted to the mounting box.

[0008] Preferably, the piston rod of the dual-rod hydraulic cylinder is adapted to the corresponding blind hole.

[0009] Preferably, the protective cover is made of transparent acrylic material.

[0010] The beneficial effects of this invention are as follows: During the compression test, the specimen can be manually placed on the approximate position of the test platform directly below the pressure head. Then, the motor is run, and with the cooperation of the reducer, the four sets of screws are driven to rotate synchronously through bevel gear transmission. The screw connection between the nut and the screw, along with the guiding and limiting effect of the guide groove on the moving rod, causes the four sets of moving rods to move synchronously until the four positioning blocks clamp the specimen, ensuring accurate alignment between the specimen and the pressure head. Next, the telescopic rod of the press is extended until the pressure head touches the top of the specimen. Then, the motor is run again, driving the screws to reverse, causing the moving rods to retract, thus releasing the lateral restriction on the specimen. Afterward, the electric push rod is operated, causing its telescopic end to retract, moving the protective cover downward until the bottom of the protective cover touches the test platform, thus protecting the testing equipment. Then, continue running the press. The extension of the telescopic rod allows the pressure head to apply pressure to the specimen. Simultaneously, observe the side of the specimen until a crack appears on the side. Record the pressure at this point; this pressure is the unconfined compressive strength of the specimen. After the test, move the pressure head and protective cover back to their original positions, and then remove the specimen from the test bench. This method achieves automatic and accurate centering of the specimen and effective shielding during the experiment, making the overall operation simpler, more convenient, safer, and more practical. Furthermore, the detachable connection between the protective cover and the telescopic end of the electric push rod allows for flexible disassembly and replacement of the protective cover if it is damaged by flying debris, making the entire device more convenient and practical. Attached Figure Description

[0011] Fig. 1 This is a schematic diagram of the main structure of this utility model;

[0012] Fig. 2 This is a top view of the cavity structure of this utility model;

[0013] Fig. 3 is the overhead structure schematic diagram of the test bench of the utility model;

[0014] Fig. 4 is the main view structure schematic diagram of the support seat of the utility model;

[0015] Fig. 5 is the main view structure schematic diagram of the installation box of the utility model;

[0016] Fig. 6 is the main view structure schematic diagram when the installation box and the support seat of the utility model are connected.

[0017] The figure mark: 1 is test bench, 2 is press, 3 is cavity, 4 is motor, 5 is speed reducer, 6 is driving bevel gear, 7 is screw rod, 8 is driven bevel gear, 9 is nut, 10 is moving rod, 11 is guide slot, 12 is positioning block, 13 is pressure head, 14 is electric push rod, 15 is protective cover, 16 is support seat, 17 is double-rod hydraulic cylinder, 18 is installation box, 19 is blind hole. DETAILED DESCRIPTION

[0018] The utility model will be further described in detail below in combination with the drawings and specific implementation:

[0019] As Figs. 1 to 6 shown, a kind of coal gangue regeneration mixture's compression test device, including test bench 1 and fixedly arranged on test bench 1 press 2, test bench 1 is hollow and is provided with cavity 3, the bottom of test bench 1 is fixedly arranged with motor 4 and speed reducer 5, the output shaft of motor 4 is coaxially fixedly connected with the input shaft of speed reducer 5, the output shaft of speed reducer 5 is upwardly inserted into cavity 3 and coaxially fixedly connected with driving bevel gear 6. Screw rod 7 is horizontally and rotatably arranged on the four side walls of cavity 3, the end of screw rod 7 close to driving bevel gear 6 is fixedly connected with driven bevel gear 8 meshed perpendicularly with driving bevel gear 6, nut 9 is threadedly connected on screw rod 7, the top of nut 9 is vertically fixed and arranged with moving rod 10, the top of test bench 1 is provided with guide slot 11 communicated with cavity 3 corresponding to moving rod 10, moving rod 10 is extended to the top of test bench 1 through corresponding guide slot 11 and its top side close to driving bevel gear 6 is fixedly connected with positioning block 12. The telescopic rod of press 2 is coaxially arranged with the output shaft of speed reducer 5 and its downward and coaxially fixedly connected with pressure head 13, the top of press 2 is vertically fixed and arranged with electric push rod 14, the telescopic end of electric push rod 14 is upward and detachably connected with transparent protective cover 15, protective cover 15 is arranged on the outside of press 2 and its bottom end is abutted on the top of test bench 1;

[0020] When the compression test is performed, the test piece can be placed on the test table 1 by hand at first. Then, the motor 4 is operated to drive the four groups of screw rods 7 to rotate synchronously through the gear transmission of the speed reducer 5, and then the four groups of moving rods 10 are driven to move synchronously through the screw connection between the nuts 9 and the screw rods 7 and the guiding and limiting action of the guide grooves 11 on the moving rods 10, until the four groups of positioning blocks 12 clamp the test piece, so that the test piece is accurately centered with the pressing head 13. Then, the telescopic rod of the press 2 is elongated until the pressing head 13 abuts against the top of the test piece, and then the motor 4 is operated to drive the screw rods 7 to reverse, so that the moving rods 10 retract, and the lateral limitation of the test piece is released. Then, the electric push rod 14 is operated to retract the telescopic end, so that the protective cover 15 is lowered until the bottom end of the protective cover 15 abuts against the test table 1, and the test equipment is shielded and protected. Then, the press 2 is continuously operated to elongate the telescopic rod, so that the pressing head 13 applies pressure to the test piece, and the side surface of the test piece is observed until the test piece appears a crack trace on the side surface, and the pressure at this time is recorded as the unconfined compressive strength of the test piece. After the test is completed, the pressing head 13 and the protective cover 15 are raised to reset, and the test piece is removed from the test table 1. In this way, the automatic and accurate centering of the test piece and the effective shielding and protection during the test can be realized, the overall operation is more simple and convenient, the safety is higher, and the device is more practical. In addition, through the detachable connection between the protective cover 15 and the telescopic end of the electric push rod 14, the protective cover 15 can be flexibly disassembled and replaced when the protective cover 15 is damaged due to the impact of splashed debris and other factors, so that the device is more convenient and practical. The press 2, the motor 4, the speed reducer 5, the electric push rod 14 and the double-rod hydraulic cylinder 17 can all adopt the prior art.

[0021] In this embodiment, the moving rods 10 are matched with the guide grooves 11 to ensure the smooth movement of the moving rods 10.

[0022] In the embodiment, the telescopic end top of the electric push rod 14 is fixedly connected with a support seat 16, the support seat 16 is built-in with a double-rod hydraulic cylinder 17, and the two piston rods of the double-rod hydraulic cylinder 17 can extend out of the support seat 16. The inner top of the protective cover 15 is fixedly provided with a mounting box 18, blind holes 19 are formed in the left and right inner side walls of the mounting box 18, the mounting box 18 is sleeved on the support seat 16, the two piston rods of the double-rod hydraulic cylinder 17 correspond to the two blind holes 19 one by one and are inserted, when the protective cover 15 needs to be replaced, the double-rod hydraulic cylinder 17 can be operated first, so that the two piston rods are retracted and reset, the insertion and fixation of the mounting box 18 are released, the protective cover 15 is moved upward, the mounting box 18 is separated from the support seat 16, and the original protective cover 15 can be disassembled. After the new protective cover 15 is taken, the mounting box 18 on the new protective cover 15 is aligned with the support seat 16, is inserted and sleeved in place, the double-rod hydraulic cylinder 17 is operated, the two piston rods are elongated and inserted in place in the corresponding blind holes 19, the mounting box 18 is inserted and fixed, and therefore the fixing and installation of the new protective cover 15 are completed, the connection is stable, and subsequent lifting use is not affected. In this way, the protective cover 15 can be conveniently disassembled and assembled, the protective cover 15 can be flexibly replaced when the protective cover 15 is damaged due to splashing of slag and other factors, and the device is more convenient and practical as a whole.

[0023] In the embodiment, the support seat 16 is matched with the mounting box 18, so that the mounting box 18 can be smoothly sleeved in place.

[0024] In the embodiment, the piston rod of the double-rod hydraulic cylinder 17 is matched with the corresponding blind hole 19, so that the piston rod of the double-rod hydraulic cylinder 17 can be smoothly inserted in place, and the insertion and fixation of the mounting box 18 are achieved.

[0025] In the embodiment, the protective cover 15 is made of transparent acrylic material, so that the observation of the test piece during the test process is not affected while the strength and service life of the protective cover 15 are ensured.

[0026] The above merely describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A coal gangue regeneration mixture compression test device comprising a test table and a press fixedly installed on the test table, characterized in that, The test bed is hollowly provided with a cavity, a motor and a speed reducer are fixedly arranged on the bottom of the test bed, the output shaft of the motor is coaxially and fixedly connected with the input shaft of the speed reducer, the output shaft of the speed reducer upwardly extends into the cavity and coaxially and fixedly sleeved with a driving bevel gear, the four side walls of the cavity are all horizontally and rotationally provided with a screw rod, the end of the screw rod close to the driving bevel gear is fixedly sleeved with a driven bevel gear which is perpendicular to the driving bevel gear, the screw rod is threadedly sleeved with a nut, the top of the nut is vertically and fixedly provided with a moving rod, the test bed top is provided with a guide groove which is communicated with the cavity, the moving rod extends out of the test bed through the corresponding guide groove and the upper part of the side close to the driving bevel gear is fixedly connected with a positioning block, the telescopic rod of the press is coaxially arranged with the output shaft of the speed reducer and downwardly and coaxially fixedly connected with a pressure head, the top of the press is vertically and fixedly provided with an electric push rod, the telescopic end of the electric push rod upwardly and detachably connected with a transparent protective cover, the protective cover is sleeved outside the press and the bottom end abuts on the test bed top.

2. The coal gangue regeneration mixture compression test device according to claim 1, characterized in that, The moving rod is matched with the guide groove.

3. The coal gangue regeneration mixture compression test device according to claim 1, characterized in that, The telescopic end of the electric push rod is fixedly connected with a support seat, the support seat is built-in with a double-rod hydraulic cylinder, the two piston rods of the double-rod hydraulic cylinder can extend out of the support seat, the inner top of the protective cover is fixedly provided with a mounting box, the left and right inner side walls of the mounting box are both provided with a blind hole, the mounting box is sleeved on the support seat, the two piston rods of the double-rod hydraulic cylinder are one-to-one corresponding with the two blind holes and are inserted.

4. The coal gangue regeneration mixture compression test device according to claim 3, characterized in that, The support seat is matched with the mounting box.

5. The coal gangue regeneration mixture compression test device according to claim 3, wherein The piston rod of the double-rod hydraulic cylinder is matched with the corresponding blind hole.

6. The coal gangue regeneration mixture compression test device according to claim 1, wherein The protective cover is made of transparent acrylic material.

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