CN214408065U - Impact rock breaking test bed for simulating rock stratum confining pressure - Google Patents
Impact rock breaking test bed for simulating rock stratum confining pressure Download PDFInfo
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- CN214408065U CN214408065U CN202022769919.0U CN202022769919U CN214408065U CN 214408065 U CN214408065 U CN 214408065U CN 202022769919 U CN202022769919 U CN 202022769919U CN 214408065 U CN214408065 U CN 214408065U
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Abstract
The utility model relates to a broken rock test bench of impact of simulation rock stratum confined pressure, include: the device comprises a base, a sample box, a confining pressure loading device, a cutting device, a water circulation system, a hoisting system and a monitoring system, wherein a supporting frame is arranged on the base; the sample box is arranged on the base; the confining pressure loading device is used for applying bidirectional confining pressure to the rock mass sample; the cutting device is used for milling and cutting rock mass samples in the rock impact breaking test; the water circulation system is used for guiding water to a cutting position in the rock-breaking impact test; the hoisting system is used for hoisting the rock mass sample into the sample box; the monitoring system is used for monitoring a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system. The impact rock breaking test bed can perform a simulation test of rock breaking of a milling wheel of a double-wheel slot milling machine, can perform a rock breaking test of a single-period multiple cutting tooth arrangement mode under the condition of no confining pressure, and then assists in improving and optimizing design of the slot milling machine.
Description
Technical Field
The utility model relates to a strike broken rock test technical field, in particular to broken rock test bench of impact of simulation rock stratum confined pressure.
Background
The underground continuous wall is a continuous wall constructed below the ground for water interception, seepage prevention, soil retaining, and load bearing. The double-wheel slot milling machine is core equipment in the construction of underground continuous walls, and the arrangement method of cutting teeth of the milling wheel is still monopolized abroad. The premise of improving the efficiency of the slot milling machine by researching and optimizing the gear distribution mode of the milling wheel is to research the rock breaking efficiency of a gear distribution system.
Rock milling and crushing are complex processes of impact, extrusion, shearing and other interactions between cutting teeth and rocks in the rotation process of a milling wheel. When construction is carried out, the working device of the slot milling machine is placed in the guide groove, the milling wheel starts to rotate, the cutting teeth arranged on the milling wheel start to rotate and impact and extrude rocks, and when impact force and pressure exceed the strength of the rocks, the rocks are disintegrated and broken, fully mixed with slurry and then pumped out by the slurry guide pipe.
At present, the rock breaking efficiency of a double-wheel slot milling machine is mainly optimized, the influence of a tooth arrangement system on the milling efficiency is firstly solved, the slot milling machine is high in manufacturing cost, the cost is too high and difficult to realize when a test is directly applied to engineering, so that the slot milling machine can be improved and optimized in an auxiliary mode through a slot milling test machine, and no relevant impact rock breaking test equipment exists at present.
SUMMERY OF THE UTILITY MODEL
The application provides an impact rock breaking test bed of simulation rock stratum confined pressure has solved not have relevant impact rock breaking test equipment among the prior art, can't be through the technical problem of experiment simulation rock breaking process and then supplementary slot milling machine improvement optimal design, has realized the simulation of two rounds of slot milling machine cutterhead rock breaking process, can carry out the rock breaking test of the multiple pick arrangement pattern of monocycle under the condition that has or not confined pressure, the improvement optimal design of supplementary slot milling machine then.
The application provides a broken rock test bench of impact of simulation rock stratum confined pressure includes: a base, a sample box, a confining pressure loading device, a cutting device, a water circulation system, a hoisting system and a monitoring system, wherein,
a support frame is arranged on the base;
the sample box is arranged on the base and used for loading a rock mass sample;
the confining pressure loading device is arranged on the sample box and is used for applying bidirectional confining pressure to the rock mass sample;
the cutting device is arranged on the supporting frame and used for milling and cutting the rock mass sample in a rock impact breaking test;
the water circulation system is arranged on the supporting frame and used for guiding water to a cutting position in a rock impact breaking test;
the hoisting system is arranged on the supporting frame and used for hoisting the rock mass sample into the sample box;
the monitoring system is used for monitoring a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system.
Preferably, a bearing platform is arranged at the top of the base; the support frame includes: the supporting columns are distributed at the corners of the bearing platform, and the top platform is fixed on the supporting columns;
the top platform is provided with a fixing groove matched with the support column, and the support column is fixed with the top platform through screws.
Preferably, the sample box is arranged to be a box structure with an open top, and the rock sample is loaded in the cavity in the sample box;
a water outlet is formed in the bottom of the sample box;
the water outlet is provided with a detachable filter screen.
Preferably, the confining pressure loading device comprises: two linear force applying components, a transverse loading plate and a longitudinal loading plate,
the transverse loading plate and the longitudinal loading plate are respectively arranged at the position of a transverse side wall and the position of a longitudinal side wall in the sample box;
and the output ends of the two linear force application components are respectively used for fixing the transverse loading plate and the longitudinal loading plate so as to respectively apply transverse pressure and longitudinal pressure to the rock mass sample.
Preferably, the water circulation system includes: a water tank, a water pump, a plurality of water pipes, a water storage tank and a plurality of spray heads, wherein,
the water tank is arranged on the base and is communicated with the water storage tank through a water conveying pipeline;
the water pump is arranged on the water conveying pipeline;
the water storage tank is connected with the spray head through the water pipe;
the plurality of spray heads are arranged on a cutter frame of the cutting device, and the spraying direction of the spray heads is adapted to the position of cutting teeth of the cutting device;
and a water outlet at the bottom of the sample box is communicated with the water tank.
Preferably, the hoisting system comprises: a hoisting machine and a running gear,
the lifting machine comprises: the cable winding device comprises a rotating motor, a rotating seat, a suspension arm, a lifting cable, a cable winding motor and a clamping component, wherein the rotating seat is movably arranged on the supporting frame, and the rotating motor drives the rotating seat to rotate; the suspension arm is arranged on the rotary seat; the lifting motor is arranged on the suspension arm; one end of the lifting cable is fixed on an output shaft of the cable winding motor, and the other end of the lifting cable is hung on the clamping component; the cable winding motor rotates in two directions to enable the lifting cable to be lengthened or shortened and drive the clamping component to vertically descend or ascend; the clamping component can grab the rock mass sample;
the running gear comprises: the walking driving part and the guide rail are fixed on the bearing platform on the base; the sample box is arranged on the guide rail in a sliding manner; the output end of the walking driving component fixes the sample box, the sample box can be glidingly extended out of the supporting frame to be under the clamping component so as to load the rock mass sample, and meanwhile, the sample box can be glidingly retracted into the supporting frame to be under the cutting device.
Preferably, the cutting device comprises: a linear driving part, a tool frame, a rotary driving part, a transmission shaft, a plurality of cutting picks, a cutting pick base and a plurality of position adjusting devices, wherein,
the linear driving part is arranged on the top platform of the supporting frame; the output end of the linear driving component is fixedly connected with the cutter frame and drives the cutter frame to vertically lift or press down;
the transmission shaft is rotatably arranged on the cutter frame;
the rotary driving part is arranged on the cutter frame, and the output end of the rotary driving part is fixedly connected with the transmission shaft so as to drive the transmission shaft to rotate;
the cutting pick is fixed on the position adjusting device through the cutting pick base; the position adjusting device is arranged on the transmission shaft in a sliding mode and can turn over relative to the transmission shaft.
Preferably, the position adjustment device includes: an upper part of the position adjusting device, a lower part of the position adjusting device, a plurality of fastening screws and nuts, a plurality of third fixing screws,
the bottom surface shape of the upper part of the position adjusting device is matched with the shape of the upper part of the transmission shaft;
the shape of the top surface of the lower part of the position adjusting device is matched with the shape of the lower part of the transmission shaft;
the upper part of the position adjusting device is fixedly connected with the lower part of the position adjusting device through a plurality of fastening screws and nuts; the combined shaft sleeve body formed by butting the upper part of the position adjusting device and the lower part of the position adjusting device is provided with a shaft hole for the transmission shaft to pass through, and the combined shaft sleeve body is connected with the transmission shaft in a sliding way; the combined shaft sleeve body is provided with a plurality of third threaded through holes;
the transmission shaft is horizontally arranged, and the third threaded through holes are arranged along the radial direction of the transmission shaft;
the third fixing screw penetrates through the third threaded through hole and then tightly props against the transmission shaft, so that the combined shaft sleeve body is fixed with the transmission shaft;
the cutting pick base is fixed to the bottom of the lower portion of the position adjusting device through a second connecting rod.
Preferably, the upper part of the position adjusting device and the lower part of the position adjusting device are arranged in a semicircular shape, the two sides of the position adjusting device extend to form a butt plate, and the butt plate is provided with a through hole for the fastening screw to pass through;
the transmission shaft is provided with netted texture groove corresponding to the position of third fixed screw, just the tip of third fixed screw be provided with netted texture groove complex texture is protruding.
Preferably, the monitoring system includes: a console, a control circuit, a normal stress sensor and a tangential stress sensor,
the control circuit is arranged on the control platform and is electrically connected with the display, the control switch, the normal stress sensor, the tangential stress sensor, a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system;
the normal stress sensor is arranged at the top end of a cutting tooth of the cutting device so as to detect the impact normal stress of the cutting tooth in the rock breaking process;
the tangential stress sensor is arranged at the side end of a cutting tooth of the cutting device so as to detect the impact tangential stress of the cutting tooth in the rock breaking process;
the control console is provided with a display and a plurality of control switches, and the control switches respectively control the on-off states of a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system; the display displays the impact normal stress, the impact tangential stress, the working parameter information of the driving part of the confining pressure loading device, the working parameter information of the driving part of the cutting device, the working parameter information of the water pump of the water circulation system and the working parameter information of the driving part of the hoisting system.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the cutting device is provided with a position adjusting device capable of adjusting the spacing and the horizontal position of a plurality of cutting teeth, the position adjusting device adjusts the spacing and the horizontal position between different cutting teeth, different horizontal positions mean different rock entering sequences, the impact rock breaking test of any spacing and any rock entering sequence of the plurality of cutting teeth is realized through the cutting device, the influence of rock breaking efficiency of different cutting tooth types can be researched, a preferred scheme is provided for selection of a double-wheel cutting tooth slot milling machine, the rock breaking condition is more consistent with real impact rock breaking conditions, a confining pressure environment of a rock stratum is simulated through a confining pressure loading device, a cooling and dust removing effect is realized when a rock sample is cut through a water circulation system, the operation convenience of loading the rock sample is improved through a hoisting system, and thus the technical problem that related impact rock breaking test equipment does not exist in the prior art, the rock breaking process cannot be simulated through experiments, and then the optimization design of the slot milling machine is assisted is solved, the simulation of the rock breaking process of the milling wheel of the double-wheel slot milling machine is realized, the rock breaking test of multiple cutting tooth arrangement modes in a single period can be carried out under the condition of no confining pressure, and then the improved optimization design of the slot milling machine is assisted.
Drawings
FIG. 1 is a schematic structural diagram of a percussion rock breaking test bed for simulating formation confining pressure provided by an embodiment of the application;
FIG. 2 is a schematic diagram of cutting tooth spacing adjustment of an impact rock breaking test bed for simulating formation confining pressure provided by the embodiment of the application;
fig. 3 is a schematic structural diagram of a cutting device provided in an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating adjustment of spacing between a plurality of cutting picks of the cutting device provided by the embodiment of the application;
FIG. 5 is a schematic diagram of horizontal position adjustment of multiple picks of the cutting device provided by the embodiment of the application;
FIG. 6 is a schematic illustration of the position of a cutting pick, a pick base and a stress sensor provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of a position adjustment device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a confining pressure loading device provided in an embodiment of the present application.
In the figure:
1-base, 1.1-pillar, 1.2-top platform, 2-sample box, 2.1-confining pressure loading device, 2.2-water outlet, 2.3-loading plate, 2.4-set screw, 3-linear driving part, 4-cutting device, 4.1-tool frame, 4.2-cutting pick, 4.3-cutting pick base, 4.4-cutting pick set screw, 4.14-transmission shaft, 4.15-fastening screw and nut, 4.16-position adjusting device lower part, 4.17-position adjusting device upper part, 4.18-third set screw, 4.19-second connecting rod, 5.1-water tank, 5.2-water pump, 5.3-water delivery pipeline, 5.4-water storage tank, 5.5-filter screen, 5.6-spray head, 6.1-traveling driving part, 6.2-guide rail, 7-control table, 7.1-electric signal transmission line, 8-rotary driving component, 9.1-normal stress sensor, 9.2-tangential stress sensor, 10-lifter, 11-sample.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model provides a simulation rock stratum confining pressure's impact rock-breaking test bench, includes: the device comprises a base 1, a sample box 2, a confining pressure loading device 2.1, a cutting device 4, a water circulation system, a hoisting system and a monitoring system, wherein a supporting frame is arranged on the base 1; the sample box 2 is arranged on the base 1 and used for loading a rock mass sample 11; the confining pressure loading device 2.1 is arranged on the sample box 2 and is used for applying bidirectional confining pressure to the rock mass sample 11; the cutting device 4 is arranged on the supporting frame and used for milling and cutting the rock mass sample 11 in the rock impact breaking test; the water circulation system is arranged on the support frame and used for guiding water to a cutting position in the rock-breaking impact test; the hoisting system is arranged on the supporting frame and used for hoisting the rock mass sample 11 into the sample box 2; the monitoring system is used for monitoring the driving part of the confining pressure loading device 2.1, the driving part of the cutting device 4, the water pump of the water circulation system and the driving part of the hoisting system.
With reference to fig. 3 and 4, the cutting device 4 comprises: the cutting tool comprises a linear driving part 3, a tool frame 4.1, a rotary driving part 8, a transmission shaft 4.14, a plurality of cutting picks 4.2, a cutting pick base 4.3 and a plurality of position adjusting devices.
The linear driving part 3 is arranged on the top platform 1.2 of the supporting frame, and the top platform 1.2 is provided with a through hole for the output end of the linear driving part 3 to pass through; the output end of the linear driving component 3 is fixedly connected with the cutter frame 4.1, and the cutter frame 4.1 is driven to vertically lift or press down. As a preferred embodiment, the linear driving part 3 is a hydraulic cylinder arranged vertically; the tool frame 4.1 is fixed at the bottom end of the piston rod of the hydraulic cylinder and fixes its attitude.
The transmission shaft 4.14 is rotatably arranged on the cutter frame 4.1, through holes are formed in two ends of the cutter frame 4.1, bearings are installed on the through holes, and the transmission shaft 4.14 is installed in the bearings. The rotary driving part 8 is arranged on the cutter frame 4.1, and the output end of the rotary driving part 8 is fixedly connected with the transmission shaft 4.14 so as to drive the transmission shaft 4.14 to rotate. As a preferred embodiment, the rotary drive member 8 is a servomotor for providing rotary power to the cutting pick 4.2, the rotation of the cutting pick 4.2 performs only one milling cycle of rotary cutting, and the servomotor does not perform multiple rotations, but only performs rotation within one milling cycle. When the milling cycle is made for a tooth arrangement system, the cutting pick 4.2 in a certain circumference (generally 1/4 or 1/5 circles) adopts an arrangement method, the same tooth arrangement method is adopted in other circumferences, and the cutting pick 4.2 in a 1/4 or 1/5 circle is a milling cycle.
Referring to fig. 5 and 6, the pick 4.2 is secured to the position adjustment device by a pick base 4.3, the pick base 4.3 being a welded rigid connection. The cutting pick base 4.3 is provided with a groove for accommodating the cutting pick 4.2, and the side body of the cutting pick base 4.3 is provided with a plurality of cutting pick thread through holes communicated with the groove; after the root of the cutting pick 4.2 is arranged in the groove, the cutting pick 4.2 is tightly pressed after the cutting pick fixing screw 4.4 penetrates through the cutting pick thread through hole, so that the cutting pick 4.2 is fixed on the cutting pick base 4.3. Pick 4.2 adopts the pick model that generally adopts in the engineering now, and when installing pick 4.2, at first put into pick base 4.3 with pick 4.2, put to predetermined position after, screw in pick set screw 4.4 to screw, accomplish the installation of pick 4.2 promptly. When a rock breaking test is carried out, a stress sensor is arranged between the cutting tooth 4.2 and the cutting tooth base 4.3, so that normal stress and tangential stress in the rock breaking process can be detected, and related data are provided for measuring rock breaking efficiency.
Referring to fig. 7, the position adjustment device is connected to the pick base 4.3 by a second link 4.19; the position adjusting device is arranged on the transmission shaft 4.14 in a sliding mode and can turn over relative to the transmission shaft 4.14. The position adjustment device includes: a position adjusting device upper part 4.17, a position adjusting device lower part 4.16, a plurality of fastening screws and nuts 4.15, and a plurality of third fixing screws 4.18.
The bottom shape of the upper part 4.17 of the position adjusting device is matched with the shape of the upper part of the transmission shaft 4.14; the shape of the top surface of the lower part 4.16 of the position adjusting device is matched with the shape of the lower part of the transmission shaft 4.14; the upper part 4.17 of the position adjusting device is fixedly connected with the lower part 4.16 of the position adjusting device through a plurality of fastening screws and nuts 4.15; a combined shaft sleeve body formed by butting the upper part 4.17 of the position adjusting device and the lower part 4.16 of the position adjusting device is provided with a shaft hole for a transmission shaft 4.14 to pass through, and the combined shaft sleeve body is connected with the transmission shaft 4.14 in a sliding way; the combined shaft sleeve body is provided with a plurality of third threaded through holes.
The transmission shaft 4.14 is horizontally arranged, and the third threaded through holes are arranged along the radial direction of the transmission shaft 4.14; a third fixing screw 4.18 penetrates through the third threaded through hole and then tightly pushes against the transmission shaft 4.14, so that the combined shaft sleeve body is fixed with the transmission shaft 4.14; the top of the second link 4.19 is fixed to the bottom of the lower part 4.16 of the position adjustment device.
When the position adjusting device is installed, the installation position of the position adjusting device is firstly determined, then the upper part 4.17 of the position adjusting device is installed, the lower part 4.16 of the position adjusting device is aligned with the upper part 4.17 of the position adjusting device, then the fastening screw and the nut 4.15 are installed, and the third fixing screw 4.18 is installed after the position is determined.
Furthermore, the second connecting rod 4.19 is a metal rod and is connected with the position adjusting device and the cutting pick base 4.3 through welding, so that the connection stability in a rock breaking test is ensured. The upper part 4.17 of the position adjusting device and the lower part 4.16 of the position adjusting device are arranged in a semicircular shape, the two sides of the position adjusting device extend to butt joint plates, and the butt joint plates are provided with through holes for fastening screws to pass through; the position of the transmission shaft 4.14 corresponding to the third fixing screw 4.18 is provided with a reticular texture groove, and the end part of the third fixing screw 4.18 is provided with a texture bulge matched with the reticular texture groove. The depth of the grooves of the net-shaped texture is checked according to the moment during rotation, the requirement that sliding does not occur during rotation can be met, the service life of the patterns is ensured, the diameter of the third fixing screw 4.18 also needs to be checked, the requirement of bending moment is met, and bending damage does not occur during rotation. The number of the third fixing screws 4.18 is 3, and the number of the third fixing screws 4.18 can be checked and added according to the strength.
This cutting device 4 not only can study the influence of single factor to broken rock efficiency, also can study a plurality of factors to broken rock efficiency interact (carry out the experiment of different pick 4.2 intervals to broken rock efficiency influence, the experiment of the different rock sequence of going into of many picks 4.2 to broken rock efficiency influence, the experiment of different pick 4.2 types to broken rock efficiency influence), can realize the arbitrary interval of a plurality of picks 4.2, it is experimental to go into the impact rock breaking of rock sequence wantonly, tooth system cloth advantage to study double round slot milling machine, make tooth system more extensive to the research scope of milling efficiency, the research factor is more, the test result is more close engineering reality, has apparent practicality.
Further, referring to fig. 1 and 2, a bearing platform is arranged on the top of the base 1; the support frame includes: a plurality of supporting columns 1.1 distributed at the corners of the bearing platform and a top platform 1.2 fixed on the supporting columns 1.1; the top platform 1.2 is provided with a fixing groove matched with the strut 1.1, and the strut 1.1 and the top platform 1.2 are fixed through screws; the sample box 2 is set to be a box structure with an open top and is formed by installing a steel plate and a fixing screw 2.4. The inner cavity of the sample box 2 is loaded with a rock mass sample 11; a water outlet 2.2 is arranged at the bottom of the sample box 2; a detachable filter screen 5.5 is arranged on the water outlet 2.2.
Further, referring to fig. 8, the confining pressure loading device 2.1 includes: the device comprises two linear force application parts, two loading plates 2.3, namely a transverse loading plate and a longitudinal loading plate, wherein the transverse loading plate and the longitudinal loading plate are respectively arranged at the position of a transverse side wall and the position of a longitudinal side wall in a sample box 2; a1 cm distance is reserved between the loading plates 2.3 to prevent the two loading plates 2.3 from being extruded mutually, the linear force application component is arranged at the outer side position corresponding to the loading plate 2.3 on the sample box 2, and the output end of the linear force application component is connected with the loading plate 2.3 in the sample box 2 and has a certain stroke. The output ends of the two linear force application components are respectively fixed with a transverse loading plate and a longitudinal loading plate so as to respectively apply transverse pressure and longitudinal pressure to the rock mass sample 11, and the linear force application components can be jacks.
Further, referring to fig. 1 and 2, the water circulation system includes: the water storage device comprises a water tank 5.1, a water pump 5.2, a plurality of water pipes, a water storage tank 5.4 and a plurality of spray heads 5.6, wherein the water tank 5.1 is arranged on a base 1, and the water tank 5.1 is communicated with the water storage tank 5.4 through a water pipe 5.3; the water pump 5.2 is arranged on the water conveying pipeline 5.3; the water storage tank 5.4 is connected with the spray head 5.6 through a water pipe.
A plurality of shower nozzles 5.6 set up on the cutter frame 4.1 of cutting device 4, specifically can be 2 shower nozzles 5.6 of establishing respectively at the cutter frame both ends, and the jet direction of shower nozzle 5.6 suits with cutting tooth 4.2 position of cutting device 4, and shower nozzle 5.6 guides rivers to the position of cutting, is used for the cooling dust fall. Because the bottom of the sample box 2 is provided with the water outlet 2.2, the water outlet 2.2 is communicated with the water tank through the water return pipeline, the water circulation is realized, and the water-saving function is realized. The water outlet 2.2 is provided with a detachable filter screen 5.5 for filtering out the crushed stone impurities generated by cutting the rock mass sample 11 in the rock impact breaking process.
Further, referring to fig. 1 and 2, the hoist system includes: hoist 10 and running gear 6.1, hoist 10 includes: the rotary mechanism comprises a rotary motor, a rotary seat, a suspension arm, a lifting cable, a cable winding motor and a clamping component, wherein the rotary seat is movably arranged on a supporting frame, and the rotary motor drives the rotary seat to rotate; the suspension arm is arranged on the rotating seat; the lifting motor is arranged on the suspension arm; one end of the lifting cable is fixed on an output shaft of the cable winding motor, and the other end of the lifting cable is hung on the clamping component; the cable winding motor rotates in two directions to make the lifting cable lengthen or shorten and drive the clamping part to vertically descend or ascend; the gripping member is capable of gripping the rock mass specimen 11.
The running gear comprises: the walking driving part 6.1 and the guide rail 6.2, the guide rail 6.2 is fixed on the bearing platform on the base 1; the sample box 2 is arranged on the guide rail 6.2 in a sliding way; the output end of the walking driving part 6.1 is fixed with the sample box 2, the sample box 2 can slide and extend out of the supporting frame to the position right below the clamping part so as to load the rock mass sample 11, and meanwhile, the sample box 2 can slide and retract the supporting frame to the position right below the cutting device 4. The travel drive means 6.1 may be a jack.
Because the rock mass sample 11 is large in size and heavy in weight, the elevator 10 is matched with the traveling device, so that the sample loading efficiency can be effectively improved, and the sample loading difficulty can be reduced.
Further, referring to fig. 2 and 6, the monitoring system includes: the device comprises a control platform 7, a control circuit, a normal stress sensor 9.1 and a tangential stress sensor 9.2, wherein the control circuit is arranged on the control platform 7 and is electrically connected with a display, a control switch, the normal stress sensor 9.1, the tangential stress sensor 9.2, a driving part (specifically a linear force application part connected with a transverse loading plate and a longitudinal loading plate) of a confining pressure loading device 2.1, a driving part (specifically a linear driving part 3 and a rotary driving part 8) of a cutting device 4, a water pump 5.2 of a water circulation system and a driving part (specifically a walking driving part 6.1) of a hoisting system.
The normal stress sensor 9.1 is arranged at the top end of a cutting tooth 4.2 of the cutting device 4 so as to detect the impact normal stress of the cutting tooth 4.2 in the rock breaking process; the tangential stress sensor 9.2 is arranged at the side end of a cutting tooth 4.2 of the cutting device 4 so as to detect the impact tangential stress of the cutting tooth 4.2 in the rock breaking process; the normal stress sensor 9.1 and the tangential stress sensor 9.2 both adopt miniature impact force sensors, and the normal stress sensor 9.1 is arranged at the end part of the inner side of the cutting pick base 4.3, is contacted with the end part of the cutting pick 4.2 and is used for detecting the impact normal force of the cutting pick 4.2. The tangential stress sensor 9.2 is arranged on the inner side face of the cutting pick base 4.3, when the cutting pick 4.2 is subjected to tangential force, the tangential stress sensor 9.2 can be extruded to one side, so that the tangential stress sensor 9.2 generates stress value information, the normal stress sensor 9.1 and the tangential stress sensor 9.2 transmit the measured stress value to the control console 7 through the electric signal transmission line 7.1, and the relation between the stress value and time is displayed and recorded.
The control console 7 is provided with a display and a plurality of control switches, and the control switches respectively control the start-stop states of a driving part of the confining pressure loading device 2.1, a driving part of the cutting device 4, a water pump 5.2 of the water circulation system and a driving part of the hoisting system; the display displays the impact normal stress, the impact tangential stress, the working parameter information of the driving part of the confining pressure loading device 2.1, the working parameter information of the driving part of the cutting device 4, the working parameter information of the water pump 5.2 of the water circulation system and the working parameter information of the driving part of the hoisting system.
The impact rock breaking test bed can independently or interactively research single factor and multiple factors so as to research the influence of a tooth distribution system on a milling wheel system; the test bed is more consistent with the real rock breaking working condition, and is simple to operate and easy to load samples; the water circulation system can realize the water-saving effect; the test bed provides a relatively complete test technical method for researching the design method of the tooth arrangement system of the double-wheel slot milling machine, and the design method for researching the tooth arrangement system of the double-wheel slot milling machine can fill the gap of the current domestic research of the project through the interaction systematicness of single influence factors or multiple influence factors influencing the rock breaking efficiency of the tooth arrangement system of the double-wheel slot milling machine.
The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a broken rock test bench of impact of simulation rock stratum confined pressure which characterized in that includes: a base, a sample box, a confining pressure loading device, a cutting device, a water circulation system, a hoisting system and a monitoring system, wherein,
a support frame is arranged on the base;
the sample box is arranged on the base and used for loading a rock mass sample;
the confining pressure loading device is arranged on the sample box and is used for applying bidirectional confining pressure to the rock mass sample;
the cutting device is arranged on the supporting frame and used for milling and cutting the rock mass sample in a rock impact breaking test;
the water circulation system is arranged on the supporting frame and used for guiding water to a cutting position in a rock impact breaking test;
the hoisting system is arranged on the supporting frame and used for hoisting the rock mass sample into the sample box;
the monitoring system is used for monitoring a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system.
2. The percussion rock-breaking test bench for simulating formation confining pressure according to claim 1,
a bearing platform is arranged at the top of the base; the support frame includes: the supporting columns are distributed at the corners of the bearing platform, and the top platform is fixed on the supporting columns;
the top platform is provided with a fixing groove matched with the support column, and the support column is fixed with the top platform through screws.
3. The percussion rock-breaking test bench for simulating formation confining pressure according to claim 1,
the sample box is of a box body structure with an open top, and a rock sample is loaded in a cavity in the sample box;
a water outlet is formed in the bottom of the sample box;
the water outlet is provided with a detachable filter screen.
4. The percussion rock-breaking test bed for simulating formation confining pressure according to claim 1, wherein the confining pressure loading device comprises: two linear force applying components, a transverse loading plate and a longitudinal loading plate,
the transverse loading plate and the longitudinal loading plate are respectively arranged at the position of a transverse side wall and the position of a longitudinal side wall in the sample box;
and the output ends of the two linear force application components are respectively used for fixing the transverse loading plate and the longitudinal loading plate so as to respectively apply transverse pressure and longitudinal pressure to the rock mass sample.
5. The percussion rock-breaking test stand for simulating formation confining pressure according to claim 1, wherein the water circulation system comprises: a water tank, a water pump, a plurality of water pipes, a water storage tank and a plurality of spray heads, wherein,
the water tank is arranged on the base and is communicated with the water storage tank through a water conveying pipeline;
the water pump is arranged on the water conveying pipeline;
the water storage tank is connected with the spray head through the water pipe;
the plurality of spray heads are arranged on a cutter frame of the cutting device, and the spraying direction of the spray heads is adapted to the position of cutting teeth of the cutting device;
and a water outlet at the bottom of the sample box is communicated with the water tank.
6. The percussion rock-breaking test bed for simulating formation confining pressure according to claim 1, wherein the hoisting system comprises: a hoisting machine and a running gear,
the lifting machine comprises: the cable winding device comprises a rotating motor, a rotating seat, a suspension arm, a lifting cable, a cable winding motor and a clamping component, wherein the rotating seat is movably arranged on the supporting frame, and the rotating motor drives the rotating seat to rotate; the suspension arm is arranged on the rotary seat; the cable winding motor is arranged on the suspension arm; one end of the lifting cable is fixed on an output shaft of the cable winding motor, and the other end of the lifting cable is hung on the clamping component; the cable winding motor rotates in two directions to enable the lifting cable to be lengthened or shortened and drive the clamping component to vertically descend or ascend; the clamping component can grab the rock mass sample;
the running gear comprises: the walking driving part and the guide rail are fixed on the bearing platform on the base; the sample box is arranged on the guide rail in a sliding manner; the output end of the walking driving component fixes the sample box, the sample box can be glidingly extended out of the supporting frame to be under the clamping component so as to load the rock mass sample, and meanwhile, the sample box can be glidingly retracted into the supporting frame to be under the cutting device.
7. The percussion rock-breaking test bed for simulating formation confining pressure according to claim 1, wherein the cutting device comprises: a linear driving part, a tool frame, a rotary driving part, a transmission shaft, a plurality of cutting picks, a cutting pick base and a plurality of position adjusting devices, wherein,
the linear driving part is arranged on the top platform of the supporting frame; the output end of the linear driving component is fixedly connected with the cutter frame and drives the cutter frame to vertically lift or press down;
the transmission shaft is rotatably arranged on the cutter frame;
the rotary driving part is arranged on the cutter frame, and the output end of the rotary driving part is fixedly connected with the transmission shaft so as to drive the transmission shaft to rotate;
the cutting pick is fixed on the position adjusting device through the cutting pick base; the position adjusting device is arranged on the transmission shaft in a sliding mode and can turn over relative to the transmission shaft.
8. The percussion rock-breaking test stand for simulating formation confining pressure according to claim 7, wherein the position adjusting device comprises: an upper part of the position adjusting device, a lower part of the position adjusting device, a plurality of fastening screws and nuts, a plurality of third fixing screws,
the bottom surface shape of the upper part of the position adjusting device is matched with the shape of the upper part of the transmission shaft;
the shape of the top surface of the lower part of the position adjusting device is matched with the shape of the lower part of the transmission shaft;
the upper part of the position adjusting device is fixedly connected with the lower part of the position adjusting device through a plurality of fastening screws and nuts; the combined shaft sleeve body formed by butting the upper part of the position adjusting device and the lower part of the position adjusting device is provided with a shaft hole for the transmission shaft to pass through, and the combined shaft sleeve body is connected with the transmission shaft in a sliding way; the combined shaft sleeve body is provided with a plurality of third threaded through holes;
the transmission shaft is horizontally arranged, and the third threaded through holes are arranged along the radial direction of the transmission shaft;
the third fixing screw penetrates through the third threaded through hole and then tightly props against the transmission shaft, so that the combined shaft sleeve body is fixed with the transmission shaft;
the cutting pick base is fixed to the bottom of the lower portion of the position adjusting device through a second connecting rod.
9. The percussion rock-breaking test bench of simulating formation confining pressure of claim 8,
the upper part of the position adjusting device and the lower part of the position adjusting device are arranged in a semicircular shape, the two sides of the position adjusting device extend to form butt joint plates, and the butt joint plates are provided with through holes for the fastening screws to pass through;
the transmission shaft is provided with netted texture groove corresponding to the position of third fixed screw, just the tip of third fixed screw be provided with netted texture groove complex texture is protruding.
10. The percussion rock-breaking test stand for simulating formation confining pressure according to claim 1, wherein the monitoring system comprises: a console, a control circuit, a normal stress sensor and a tangential stress sensor,
the control circuit is arranged on the control platform and is electrically connected with a display, a control switch, the normal stress sensor, the tangential stress sensor, a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system;
the normal stress sensor is arranged at the top end of a cutting tooth of the cutting device so as to detect the impact normal stress of the cutting tooth in the rock breaking process;
the tangential stress sensor is arranged at the side end of a cutting tooth of the cutting device so as to detect the impact tangential stress of the cutting tooth in the rock breaking process;
the control console is provided with a display and a plurality of control switches, and the control switches respectively control the on-off states of a driving part of the confining pressure loading device, a driving part of the cutting device, a water pump of the water circulation system and a driving part of the hoisting system; the display displays the impact normal stress, the impact tangential stress, the working parameter information of the driving part of the confining pressure loading device, the working parameter information of the driving part of the cutting device, the working parameter information of the water pump of the water circulation system and the working parameter information of the driving part of the hoisting system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362373A (en) * | 2020-11-25 | 2021-02-12 | 中国科学院武汉岩土力学研究所 | Impact rock breaking test bed for simulating rock stratum confining pressure |
| CN114397217A (en) * | 2022-01-22 | 2022-04-26 | 天地上海采掘装备科技有限公司 | Multi-tooth cutting head and cutting test bed |
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2020
- 2020-11-25 CN CN202022769919.0U patent/CN214408065U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362373A (en) * | 2020-11-25 | 2021-02-12 | 中国科学院武汉岩土力学研究所 | Impact rock breaking test bed for simulating rock stratum confining pressure |
| CN112362373B (en) * | 2020-11-25 | 2024-09-27 | 中国科学院武汉岩土力学研究所 | Impact rock breaking test bed for simulating rock stratum confining pressure |
| CN114397217A (en) * | 2022-01-22 | 2022-04-26 | 天地上海采掘装备科技有限公司 | Multi-tooth cutting head and cutting test bed |
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