CN211824956U - Novel drop hammer impact test device applied to large-deformation anchor rod - Google Patents
Novel drop hammer impact test device applied to large-deformation anchor rod Download PDFInfo
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- CN211824956U CN211824956U CN202020909714.5U CN202020909714U CN211824956U CN 211824956 U CN211824956 U CN 211824956U CN 202020909714 U CN202020909714 U CN 202020909714U CN 211824956 U CN211824956 U CN 211824956U
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Abstract
The utility model provides a novel drop hammer impact test device applied to a large-deformation anchor rod, which comprises a main body frame, a clamping mechanism, a sensor fixing device and a lifting unit; the main body frame comprises a base, a fixed cross beam, a movable cross beam and a hammer body; the clamping mechanism is arranged at the central position of the fixed cross beam, and a sensor assembly is arranged between the clamping mechanism and the fixed cross beam; the lower end of the clamping mechanism penetrates through the fixed cross beam and is used for clamping one end of the anchor rod, and the other end of the anchor rod penetrates through the movable cross beam and the hammer body in sequence; the sensor fixing device is arranged at the bottom of the anchor rod; the lifting unit is connected with the movable cross beam, and the hammer body is lifted or released through the movable cross beam and used for impacting the sensor fixing device; the utility model provides a device on-the-spot installation is reliable, swift, convenient dismantlement and change, is favorable to improving impact test's efficiency and experimental result's accuracy, has still improved the security in the testing process simultaneously.
Description
Technical Field
The utility model belongs to the technical field of test instrument, concretely relates to be applied to novel drop hammer impact test device of large deformation stock.
Background
The anchor bolt support is an important means for controlling stability of rock engineering such as mines, tunnels, side slopes and the like, usually under the action of larger impact load, the anchor bolt is broken, and the rock mass is greatly damaged, so that operation safety is endangered.
The anchor rod is used as an important supporting material in the fields of mining engineering, hydroelectric engineering, slope engineering and underground engineering, and related science and technology personnel develop various anchor rods in a large number and successfully solve a large number of engineering supporting problems in the research and application process of anchor rod supporting, but most of the anchor rods are difficult to adapt to rock mass engineering with high stress, large deformation and impact tendency. The impact test device in the prior art cannot effectively simulate the impact force of the large-deformation anchor rod in the actual use process, and cannot quickly and accurately detect the performance parameters of the large-deformation anchor rod under the action of the impact force.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The utility model aims at providing a be applied to novel drop hammer impact test device of big deformation stock for solve among the prior art unable effective simulation big deformation stock impact force that receives in the in-service use process and the problem of the performance parameter of the big deformation stock under the effect of bearing the impact force of quick accurate detection.
In order to achieve the above object, the present invention provides the following technical solutions:
a novel drop hammer impact test device for large deformation anchor rod, the device includes:
the main body frame comprises a base, a fixed cross beam, and a supporting upright and a guiding upright which are arranged between the base and the fixed cross beam, wherein a movable cross beam and a hammer body are connected onto the guiding upright in a sliding manner, and a lifting hook is arranged on the movable cross beam and used for locking or releasing the hammer body;
the clamping mechanism is arranged at the central position of the fixed cross beam, a sensor assembly is arranged between the clamping mechanism and the fixed cross beam, and the sensor assembly is used for measuring energy acting on the main body frame during an impact test; the lower end of the clamping mechanism penetrates through the fixed cross beam and is used for clamping one end of an anchor rod, and the other end of the anchor rod penetrates through the movable cross beam and the hammer body in sequence;
the sensor fixing device is arranged at the bottom of the anchor rod and used for measuring the energy resisted by the anchor rod after the anchor rod absorbs part of the energy;
the lifting unit is connected with the movable cross beam, the lifting unit lifts or releases the hammer body through the movable cross beam, and the hammer body is used for impacting the sensor fixing device.
The novel drop hammer impact test device applied to the large-deformation anchor rod is characterized in that a step hole is formed in the center of the fixed cross beam, the step hole is formed by connecting two cylindrical holes with sequentially reduced hole diameters and is an upper cylindrical hole and a lower cylindrical hole, and a step is formed between the upper cylindrical hole and the lower cylindrical hole;
the sensor assembly is embedded in the upper cylindrical hole, the lower surface of the sensor assembly is in contact with the step, and the upper surface of the sensor assembly is flush with the upper surface of the fixed cross beam.
According to the novel drop hammer impact test device applied to the large-deformation anchor rod, as a preferable scheme, a plurality of first pin holes are formed in the circumferential direction of the step;
a second pin hole corresponding to the first pin hole is formed in the upper surface of the sensor combination body, and a first through hole corresponding to the lower cylindrical hole is formed in the center of the sensor combination body;
a third pin hole corresponding to the second pin hole is formed in the upper surface of the clamping mechanism; the clamping mechanism sequentially penetrates through the first through hole and the lower cylindrical hole.
According to the novel drop hammer impact test device applied to the large-deformation anchor rod, as a preferable scheme, the clamping mechanism, the sensor combination body and the fixed cross beam are positioned through the positioning piece, and the positioning piece sequentially penetrates through the third pin hole, the second pin hole and the first pin hole.
The novel drop hammer impact test device applied to the large-deformation anchor rod preferably comprises a first combination body and a second combination body which are spliced into a cylindrical shape, wherein the first combination body and the second combination body are the same in structure, and are arranged in axial symmetry;
the first assembly comprises a first cover plate, a first bracket and a first sensor;
the first cover plate comprises an upper cover plate and a lower cover plate;
the first bracket is arranged between the upper cover plate and the lower cover plate, a plurality of first slotted holes are uniformly arranged along the circumferential direction of the first bracket, and the first slotted holes are distributed between any two second pin holes;
the first sensor is installed in the first slotted hole and the bottom of the first sensor with the upper surface contact of lower apron, the upper surface protrusion of first sensor in the upper surface of first bracket, the upper surface of first sensor with the lower surface contact of upper cover plate.
The novel drop hammer impact test device applied to the large-deformation anchor rod preferably comprises a second tray, a second bracket, a second cover plate, a second sensor and a connecting bolt; second through holes are formed in the center positions of the second tray, the second bracket and the second cover plate and are used for penetrating through the anchor rod;
a plurality of threaded holes are uniformly distributed on the upper surface of the second tray; the second bracket is arranged above the second tray, a plurality of uniformly distributed second slotted holes are formed in the second bracket, the second sensor is installed in the second slotted holes, the bottom of the second sensor is in contact with the upper surface of the second tray, and the upper surface of the second sensor protrudes out of the upper surface of the second bracket; the second cover plate is arranged above the second bracket, and a counter bore correspondingly matched with the threaded hole is formed in the second cover plate;
the second cover plate, the second bracket and the second tray are fastened through connecting bolts, and the connecting bolts penetrate through the counter bores, the second sensors and the threaded holes to fix the sensors.
Preferably, the edge of the second slot hole is provided with an opening extending to the edge of the second bracket.
According to the novel drop hammer impact test device applied to the large-deformation anchor rod, as a preferable scheme, the aperture of the second slotted hole is consistent with the outer diameter of the second sensor; the thickness of the second bracket is 2mm less than the thickness of the second sensor.
The novel drop hammer impact test device applied to the large-deformation anchor rod is preferably provided with four energy buffers, the four energy buffers are mounted on the base and located right below the hammer body, and the energy buffers are used for absorbing residual impact energy of the hammer body after the anchor rod is broken.
As a preferable scheme, the main body frame is further provided with a fence, a transverse pulling plate and a protective door;
the fence is arranged along the periphery of the top of the fixed cross beam;
the transverse pull plate is arranged around the support upright post in a surrounding manner and used for fixing the support upright post;
and when the hammer body is in a prepared hammer-falling state, the audible and visual alarm gives out alarm sound and flicks.
Compared with the closest prior art, the utility model provides a technical scheme has following excellent effect:
the device in the utility model comprises a main body frame, a clamping mechanism, a sensor fixing device and a lifting unit, wherein a movable cross beam is connected in the lifting unit to lift a hammer body to a certain height, the hammer body is released, the hammer body falls to the sensor fixing device under the action of gravity, and the energy resisted by a large-deformation anchor rod after absorbing partial energy is measured by a second sensor in the sensor fixing device; meanwhile, a sensor assembly is arranged between the clamping mechanism and the fixed cross beam, when the hammer body is released, force is uniformly applied to the sensor assembly, and energy acting on the main body frame during an impact test is measured through the first sensor.
The clamping mechanism in the utility model adopts a hydraulic clamping mechanism, which is more reliable and rapid to clamp the anchor rod, and meanwhile, the clamping mechanism can be configured according to anchor rods with different sizes, thus being convenient to disassemble and replace; the utility model provides a sensor fixing device adopts the combination formula sensor structure, and tray, bracket and apron all can adopt mill's preprocessing, and the on-the-spot installation is reliable, swift, convenient dismantlement and change, is favorable to improving impact test's efficiency and experimental result's accuracy.
The device of the utility model also comprises a safety protection mechanism such as a fence, a horizontal pulling plate, a protection door, an audible and visual alarm, an energy buffer and the like; the arrangement of the fence, the transverse pull plate, the protective door and the audible and visual alarm further ensures the safety of the device in the impact test process; the energy buffer is used for absorbing the residual impact energy of the hammer body after the anchor rod is broken, and simultaneously, the base is prevented from being damaged after the hammer body breaks through the sensor fixing device; the safety in the test process is further improved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a schematic structural view of a novel drop hammer impact test device in an embodiment of the present invention;
fig. 2 is a left side view of the novel drop hammer impact test device in the embodiment of the present invention;
fig. 3 is a schematic perspective view of the clamping mechanism, the sensor assembly and the fixed beam according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a first cover plate in a sensor assembly according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a first bracket of a sensor assembly according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a sensor fixing device according to an embodiment of the present invention.
In the figure: 11. a base; 12. fixing the cross beam; 121. a first pin hole; 122. an upper cylindrical hole; 123. a lower cylindrical hole; 13. supporting the upright post; 14. a guide upright post; 15. an energy buffer; 16. a fence; 17. transversely pulling the plate; 18. a protective door; 181. an audible and visual alarm; 2. a clamping mechanism; 21. a third pin hole; 3. moving the beam; 4. a hammer body; 5. a lifting unit; 6. a sensor assembly; 61. a second pin hole; 62. a first through hole; 63. a first cover plate; 64. a first bracket; 641. a first slot; 7. a sensor fixing device; 71. a second tray; 711. a threaded hole; 72. a second bracket; 721. a second slot; 73. a second cover plate; 731. a counter bore; 74. a connecting bolt; 75. a second sensor; 76. a second via.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, and may be, for example, either fixed or detachable; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1 to 6, the utility model provides a be applied to novel drop hammer impact test device of big deformation stock adopts the mode that the hammer block freely falls the impact to detect the performance parameter of big deformation stock under bearing the impact, the applied operating mode of the big deformation stock of effectual simulation.
As shown in fig. 1 and 2, the main body frame includes a base 11, a fixed beam 12, and a support column 13 and a guide column 14 disposed between the base 11 and the fixed beam 12, two guide columns 14 are disposed, and the two guide columns 14 are respectively disposed on the left and right sides of the main body frame; the guide upright post 14 is connected with a movable cross beam 3 and a hammer body 4 in a sliding manner, and the movable cross beam 3 is provided with a lifting hook which is used for locking or releasing the hammer body 4.
In the embodiment of the present invention, the fixed beam 12 is a rectangular structure, the number of the supporting columns 13 is four, the four supporting columns 13 are respectively and relatively disposed at the four corners of the fixed beam 12, and the two guiding columns 14 are located at the middle positions of the four supporting columns 13; the two supporting uprights 13 of each side are interconnected by a cross-brace 17; preferably, the upper and lower surfaces of the four support columns 13 are fastened to the fixed beam 12 and the base 11 by high-strength hexagon bolts and butterfly lock washers, thereby ensuring sufficient rigidity of the body frame.
In the specific embodiment of the utility model, the two ends of the movable beam 3 and the hammer body 4 are both connected on the guide upright post 14 in a sliding manner, the left side and the right side of the movable beam 3 are provided with a central hole, the movable beam 3 is sleeved in the guide upright post 14 through the central hole to slide up and down, the two ends of the movable beam 3 are provided with the clamping wheel sleeves, and the clamping wheel sleeves are connected with the fixed pulleys through the lifting ropes and then connected with the lifting motor; the movable cross beam 3 is provided with a lifting hook which is used for locking or releasing the hammer body 4, and holes used for penetrating through the anchor rods are formed in the center positions of the movable cross beam 3 and the hammer body 4.
In the specific embodiment of the utility model, the hammer body 4 comprises a main hammer body and an auxiliary hammer body, and the auxiliary hammer body is fixedly connected to the bottom of the main hammer body through bolts; the upper end of the main hammer body is provided with a lifting lug, and the lifting lug and the lifting hook are mutually meshed or loosened. The main hammer body is made of cast steel, the auxiliary hammer body is made of alloy steel through heat treatment, and the auxiliary hammer body is fixedly connected to the main hammer body through bolts, so that the service life of the hammer body 4 is prolonged, and only the auxiliary hammer body needs to be replaced even if the auxiliary hammer body is damaged after multiple impacts.
The embodiment of the utility model provides an in, the lifting hook is from trivial formula lifting hook, is provided with detection device on the lifting hook, and detection device is used for judging the locking condition of lifting hook and lug. The lifting hook has the functions of automatic hooking and automatic locking, and if the lifting hook and the lifting lug are not locked by the lock cylinder, the hammer body cannot be lifted.
The embodiment of the utility model provides an in, be provided with energy buffer 15 on the body frame, energy buffer 15 is provided with four, and four energy buffers 15 are installed on base 11, and are located hammer block 4 under, and energy buffer 15 is used for absorbing the remaining impact energy of hammer block 4 after the stock fracture. The working mode of the energy buffer 15 is a hydraulic damping mode, and the total energy absorption capacity is 10000 joules.
In the specific embodiment of the utility model, the main frame is also provided with a fence 16 and a transverse pulling plate 17, the fence 16 is arranged along the periphery of the top of the fixed beam 12; the horizontal pull plate 17 is arranged around the supporting upright columns 13 and used for fixing the supporting upright columns 13, and a hanging ladder is further hung on the horizontal pull plate 17 and used for facilitating maintenance of bench top equipment by workers. The fence 16 is arranged on the fixed cross beam 12, so that safety guarantee can be brought to the operation of maintenance personnel on the top of the device; cross braces 17 are provided around the support uprights 13, and the two support uprights 13 on each side are interconnected by the cross braces 17 for further strengthening of the main body frame.
In the specific embodiment of the utility model, the main body frame is provided with the protective door 18, the steel plate protective door 18 with the height of two meters is arranged in the three directions of the front, the left and the right of the main body frame to prevent flying objects from hurting people, the protective door 18 is provided with the power-off protection device (not marked in the figure), when the protective door 18 is in an open state, the power-off protection device is opened, and the device is in a shutdown state; when a certain part of the device breaks down or the hammer body 4 and the like need to be disassembled, an operator needs to open the protective door 18 to enter the device, once the protective door 18 is in an open state, the power-off protection device is opened, and an electrical control system of the whole device is in a stop state and does not receive any instruction. The top of guard gate 18 is provided with audible-visual annunciator 181, and when hammer block 4 was in preparation state of falling the hammer, audible-visual annunciator 181 sent out the alarm sound and dodged, and when the device got into preparation state of falling the hammer, audible-visual annunciator 181 can dodge and send out the alarm sound, and after hammer block 4 released, audible-visual annunciator 181 can self-closing.
In addition, in a specific embodiment, a travel switch (not shown) may be further disposed at the upper end of the main frame, and when the lifting travel of the hammer 4 is large, in order to avoid a collision phenomenon caused by neglected operation, the travel switch is disposed at the maximum travel of the main frame, and the hammer 4 is automatically stopped when reaching a limit position, so as to ensure safety during a test.
As shown in fig. 3, the clamping mechanism 2 is installed at the center of the fixed beam 12, a sensor assembly 6 is arranged between the clamping mechanism 2 and the fixed beam 12, and the sensor assembly 6 is used for measuring the energy acting on the main frame during the impact test; the lower end of the clamping mechanism 2 penetrates through the fixed cross beam 12 and is used for clamping one end of an anchor rod, and the other end of the anchor rod penetrates through the movable cross beam 3 and the hammer body 4 in sequence.
The clamping mode of clamping mechanism 2 in this embodiment adopts hydraulic pressure wedge clamping mode, and clamping mechanism 2 adopts high strength, high rigidity material, and processing has the helix that accords with the sample spiral line in clamping mechanism 2, the reliability of sample centre gripping when guaranteeing the experiment. The clamping mechanism 2 is provided with an independent hydraulic source, an oil pump starting button on the handheld box is pressed, the oil pump is powered on, then a clamping button of the oil cylinder is pressed, the left position of the electromagnetic valve is powered on, the clamping function is realized, a sample is clamped, and the clamping button is a click button; after one test is finished, a release button of the oil cylinder is pressed, the right position of the electromagnetic valve is electrified, the release function is realized, and the sample is released; when the whole test is finished, an oil pump stop button is pressed, and the test machine is stopped.
In the embodiment of the present invention, as shown in fig. 3, a step hole is formed in the center of the fixed beam 12, the step hole is formed by connecting two cylindrical holes with successively reduced diameters, which are an upper cylindrical hole 122 and a lower cylindrical hole 123, respectively, and a step is formed between the upper cylindrical hole 122 and the lower cylindrical hole 123; the sensor assembly 6 is embedded in the upper cylindrical hole 122, the lower surface of the sensor assembly 6 is in contact with the step, and the upper surface of the sensor assembly 6 is flush with the upper surface of the fixed cross beam 12.
In the embodiment of the present invention, a plurality of first pin holes 121 are formed in the circumferential direction of the step; the upper surface of the sensor combination body 6 is provided with a second pin hole 61 corresponding to the first pin hole 121, and the center of the sensor combination body 6 is provided with a first through hole 62 corresponding to the lower cylindrical hole 123; the upper surface of the clamping mechanism 2 is provided with a third pin hole 21 corresponding to the second pin hole 61; the chucking mechanism 2 passes through the first through hole 62 and the lower cylindrical hole 123 in this order.
The embodiment of the utility model provides an in, fixture 2, sensor assembly 6 and fixed cross beam 12 pass through the setting element location, and the setting element passes third pinhole 21, second pinhole 61 and first pinhole 121 in proper order.
In the specific embodiment of the present invention, as shown in fig. 4 and 5, the sensor assembly 6 includes a first assembly and a second assembly which are spliced into a cylinder, the structure of the first assembly is the same as that of the second assembly, and the first assembly and the second assembly are arranged in axial symmetry;
the first assembly includes a first cover plate 63, a first bracket 64, and a first sensor; the first cover plate 63 includes an upper cover plate and a lower cover plate;
the first bracket 64 is arranged between the upper cover plate and the lower cover plate, a plurality of first slots 641 are uniformly arranged along the circumferential direction of the first bracket 64, and the first slots 641 are distributed between any two second pin holes 61;
the first sensor is installed in the first slot 641, and the bottom of the first sensor contacts with the upper surface of the lower cover plate, the upper surface of the first sensor protrudes from the upper surface of the first bracket 64, and the upper surface of the first sensor contacts with the lower surface of the upper cover plate.
Fig. 6 is a schematic structural diagram of a sensor fixing device, the sensor fixing device is installed at the bottom of the anchor rod, and the sensor fixing device is used for measuring the energy resisted by the anchor rod after the anchor rod absorbs part of the energy. During the impact process, the inner rod of the anchor rod is pulled continuously, the inner rod moves downwards, and when the inner rod moves downwards, a part of energy can be absorbed.
In the embodiment of the present invention, the sensor fixing device 7 includes a second tray 71, a second bracket 72, a second cover plate 73, a second sensor 75 and a connecting bolt 74; the second tray 71, the second bracket 72 and the second cover plate 73 are provided with a second through hole 76 at the center, and the second through hole 76 is used for penetrating through the anchor rod.
A plurality of threaded holes 711 are uniformly distributed on the upper surface of the second tray 71; the second bracket 72 is arranged above the second tray 71, the second bracket 72 is provided with a plurality of uniformly distributed second slots 721, the second sensor 75 is arranged in the second slots 721, the bottom of the second sensor 75 is contacted with the upper surface of the second tray 71, the upper surface of the second sensor 75 protrudes out of the upper surface of the second bracket 72, the aperture of the second slots 721 is consistent with the outer diameter of the second sensor 75 so as to ensure that the second sensor 75 is clamped in the second slots 721, and the edges of the second slots 721 are provided with openings extending to the edges of the second bracket 72 for transition of data line connectors of the sensor 75; the second cover plate 73 is arranged above the second bracket 72, and a counter bore 731 correspondingly matched with the threaded hole 711 is arranged on the second cover plate 73; preferably, the thickness of the second bracket 72 is 2mm less than that of the second sensor 75, so that the second sensor 75 can protrude from the upper surface of the second bracket 72 when being clamped and fixed on the second tray 71, and the stress condition can be accurately transmitted;
the second cover plate 73, the second bracket 72, and the second tray 71 are fastened by a coupling bolt 74, and the coupling bolt 74 fixes the second sensor 75 through the counter bore 731, the second sensor 75, and the screw hole 711.
In an embodiment of the present invention, the diameter of the second through hole 76 is larger than the outer diameter of the anchor rod.
Of course, the utility model provides a second tray 71, second bracket 72 and second apron 73 can carry out the adaptability adjustment of size according to the energy size of measuring the stock load, and the quantity of second sensor 75 also can corresponding adjustment, the utility model discloses do not do the restriction to the size of a dimension of second tray 71, second bracket 72 and second apron 73 and the quantity of second sensor 75, do not do the restriction to the quantity of second slotted hole 721 and screw hole 711 simultaneously.
The lifting unit 5 is connected with the movable beam 3, the lifting unit 5 lifts or releases the hammer block 4 through the movable beam 3, and the hammer block 4 is used for impacting the sensor fixing device 7 at the lower end of the anchor rod.
In the embodiment of the present invention, the lifting unit 5 comprises a fixed pulley, a lifting motor, a winding drum and a lifting rope; the fixed pulley is arranged above the fixed cross beam 12, is used for changing the direction of the lifting rope and is a transition pulley of the lifting rope; the lifting motor and the winding drum are arranged on the rear side of the main body frame and are separately and independently installed with the main body frame, so that the influence of the vibration of the device on the lifting motor can be greatly reduced, and the installation and the maintenance are convenient; the lifting motor is connected with the winding drum in a transmission way, one end of the lifting rope is wound on the winding drum through the fixed pulley, and the other end of the lifting rope is connected with the movable beam 3 through the fixed pulley. When the winding drum rotates reversely, the movable beam 3 descends under the action of gravity, a lifting hook on the movable beam 3 is meshed with a lifting lug on the hammer body 4, the photoelectric switch feeds back a signal, the winding drum transmits the signal positively, and the hammer body 4 is lifted; when the hammer body 4 is released, the electromagnet pulls open the lifting hook and the lifting lug, and the hammer body 4 descends under the action of gravity.
In this embodiment, the lifting motor adopts a variable-frequency braking cycloidal pin gear speed reduction motor, the motor can realize a stepless speed change function under the control of a control system, so that the lifting speed of the hammer body 4 can be adjusted steplessly, the lifting motor is a motor and speed reducer integrated speed reduction motor, and the speed reducer adopts a cycloidal pin gear speed reducer, so that the hammer has the advantages of small volume, high working efficiency and large output torque.
When the novel drop hammer impact test device is applied to impact tests of large-deformation anchor rods, the novel drop hammer impact test device is specifically characterized in that the test device is firstly opened, the upper ends of the large-deformation anchor rods are fixed on the clamping mechanism 2, the clamping length is 150mm, and the anchor rods are ensured to be perpendicular to the surface of the hammer body 4; then, slowly raising the hammer body 4 to be 500mm higher than the bottom end of the anchor rod, adding the sensor fixing device 7 to the bottom end of the anchor rod, releasing the hammer body 4, enabling the hammer body 4 to freely fall, stopping falling when the hammer body 4 is in contact with the sensor fixing device 7, setting the position of the hammer body 4 to be zero at the moment, and firmly connecting the anchor rod and the sensor fixing device 7 in the process; finally, according to the specific test contents, the height of the hammer 4 is adjusted, and the impact is repeated.
To sum up, the utility model provides a drop hammer impact test device descends to sensor fixing device 7 under the action of gravity through hammer block 4, measures the energy that the stock of greatly warping kept out after absorbing partial energy through sensor 75, and the device is favorable to improving impact test's efficiency and experimental result's accuracy, still is provided with a plurality of safety protection mechanisms in the device, has guaranteed the security among the testing process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the following claims are intended to cover all modifications, equivalents, and improvements falling within the spirit and principles of the present invention.
Claims (10)
1. The utility model provides a be applied to novel drop hammer impact test device of big deformation stock which characterized in that, the device includes:
the main body frame comprises a base, a fixed cross beam, and a supporting upright and a guiding upright which are arranged between the base and the fixed cross beam, wherein a movable cross beam and a hammer body are connected onto the guiding upright in a sliding manner, and a lifting hook is arranged on the movable cross beam and used for locking or releasing the hammer body;
the clamping mechanism is arranged at the central position of the fixed cross beam, a sensor assembly is arranged between the clamping mechanism and the fixed cross beam, and the sensor assembly is used for measuring energy acting on the main body frame during an impact test; the lower end of the clamping mechanism penetrates through the fixed cross beam and is used for clamping one end of an anchor rod, and the other end of the anchor rod penetrates through the movable cross beam and the hammer body in sequence;
the sensor fixing device is arranged at the bottom of the anchor rod and used for measuring the energy resisted by the anchor rod after the anchor rod absorbs part of the energy;
the lifting unit is connected with the movable cross beam, the lifting unit lifts or releases the hammer body through the movable cross beam, and the hammer body is used for impacting the sensor fixing device.
2. The new drop hammer impact test device applied to the large deformation anchor rod according to claim 1, wherein the center of the fixed cross beam is provided with a step hole, the step hole is formed by connecting two cylindrical holes with successively reduced pore diameters, namely an upper cylindrical hole and a lower cylindrical hole, and a step is formed between the upper cylindrical hole and the lower cylindrical hole;
the sensor assembly is embedded in the upper cylindrical hole, the lower surface of the sensor assembly is in contact with the step, and the upper surface of the sensor assembly is flush with the upper surface of the fixed cross beam.
3. The novel drop hammer impact test device applied to the large-deformation anchor rod as claimed in claim 2, wherein a plurality of first pin holes are formed in the circumferential direction of the step;
a second pin hole corresponding to the first pin hole is formed in the upper surface of the sensor combination body, and a first through hole corresponding to the lower cylindrical hole is formed in the center of the sensor combination body;
a third pin hole corresponding to the second pin hole is formed in the upper surface of the clamping mechanism; the clamping mechanism sequentially penetrates through the first through hole and the lower cylindrical hole.
4. The new drop hammer impact test device applied to the large deformation anchor rod according to claim 3, wherein the clamping mechanism, the sensor combination body and the fixed cross beam are positioned by positioning pieces, and the positioning pieces sequentially pass through the third pin hole, the second pin hole and the first pin hole.
5. The new drop hammer impact test device applied to the large deformation anchor rod according to claim 4, wherein the sensor combination comprises a first combination body and a second combination body which are spliced into a cylinder shape, the structure of the first combination body is the same as that of the second combination body, and the first combination body and the second combination body are arranged in axial symmetry;
the first assembly comprises a first cover plate, a first bracket and a first sensor;
the first cover plate comprises an upper cover plate and a lower cover plate;
the first bracket is arranged between the upper cover plate and the lower cover plate, a plurality of first slotted holes are uniformly arranged along the circumferential direction of the first bracket, and the first slotted holes are distributed between any two second pin holes;
the first sensor is installed in the first slotted hole and the bottom of the first sensor with the upper surface contact of lower apron, the upper surface protrusion of first sensor in the upper surface of first bracket, the upper surface of first sensor with the lower surface contact of upper cover plate.
6. The novel drop hammer impact test device applied to the large-deformation anchor rod is characterized in that the sensor fixing device comprises a second tray, a second bracket, a second cover plate, a second sensor and a connecting bolt; second through holes are formed in the center positions of the second tray, the second bracket and the second cover plate and are used for penetrating through the anchor rod;
a plurality of threaded holes are uniformly distributed on the upper surface of the second tray; the second bracket is arranged above the second tray, a plurality of uniformly distributed second slotted holes are formed in the second bracket, the second sensor is installed in the second slotted holes, the bottom of the second sensor is in contact with the upper surface of the second tray, and the upper surface of the second sensor protrudes out of the upper surface of the second bracket; the second cover plate is arranged above the second bracket, and a counter bore correspondingly matched with the threaded hole is formed in the second cover plate;
the second cover plate, the second bracket and the second tray are fastened through connecting bolts, and the connecting bolts penetrate through the counter bores, the second sensors and the threaded holes to fix the sensors.
7. A novel drop hammer impact test device applied to a large deformation anchor rod according to claim 6, wherein the edge of the second slotted hole is provided with an opening extending to the edge of the second bracket.
8. The new drop hammer impact test device applied to the large deformation anchor rod according to claim 6, wherein the aperture of the second slotted hole is consistent with the outer diameter of the second sensor; the thickness of the second bracket is 2mm less than the thickness of the second sensor.
9. The novel drop hammer impact test device applied to the large-deformation anchor rod as claimed in any one of claims 1 to 8, wherein four energy buffers are arranged on the main body frame, the four energy buffers are mounted on the base and located right below the hammer body, and the energy buffers are used for absorbing residual impact energy of the hammer body after the anchor rod is broken.
10. The novel drop hammer impact test device applied to the large-deformation anchor rod is characterized in that a fence, a transverse pulling plate and a protective door are further arranged on the main body frame;
the fence is arranged along the periphery of the top of the fixed cross beam;
the transverse pull plate is arranged around the support upright post in a surrounding manner and used for fixing the support upright post;
and when the hammer body is in a prepared hammer-falling state, the audible and visual alarm gives out alarm sound and flicks.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020909714.5U CN211824956U (en) | 2020-05-26 | 2020-05-26 | Novel drop hammer impact test device applied to large-deformation anchor rod |
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| CN202020909714.5U CN211824956U (en) | 2020-05-26 | 2020-05-26 | Novel drop hammer impact test device applied to large-deformation anchor rod |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354400A (en) * | 2022-01-13 | 2022-04-15 | 长安大学 | Drop hammer type impact test device with controllable speed |
| CN115165285A (en) * | 2022-07-25 | 2022-10-11 | 江苏万峰铝业有限公司 | Aluminum alloy framework strength detection device for automobile |
| CN118032551A (en) * | 2024-04-11 | 2024-05-14 | 中国矿业大学(北京) | Anchor rod drop hammer type radial impact test device and test method |
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2020
- 2020-05-26 CN CN202020909714.5U patent/CN211824956U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354400A (en) * | 2022-01-13 | 2022-04-15 | 长安大学 | Drop hammer type impact test device with controllable speed |
| CN114354400B (en) * | 2022-01-13 | 2023-08-08 | 长安大学 | Drop hammer type impact test device with controllable speed |
| CN115165285A (en) * | 2022-07-25 | 2022-10-11 | 江苏万峰铝业有限公司 | Aluminum alloy framework strength detection device for automobile |
| CN115165285B (en) * | 2022-07-25 | 2024-05-10 | 江苏万峰铝业有限公司 | Aluminum alloy skeleton strength detection device for automobile |
| CN118032551A (en) * | 2024-04-11 | 2024-05-14 | 中国矿业大学(北京) | Anchor rod drop hammer type radial impact test device and test method |
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