CN220419028U - Bending and compressive strength testing device for underground mine supporting rod piece - Google Patents
Bending and compressive strength testing device for underground mine supporting rod piece Download PDFInfo
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- CN220419028U CN220419028U CN202321829996.8U CN202321829996U CN220419028U CN 220419028 U CN220419028 U CN 220419028U CN 202321829996 U CN202321829996 U CN 202321829996U CN 220419028 U CN220419028 U CN 220419028U
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- 238000003825 pressing Methods 0.000 claims abstract description 24
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- 238000013500 data storage Methods 0.000 claims description 15
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- 238000007906 compression Methods 0.000 abstract description 5
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- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model provides a bending and compressive strength testing device for a mine underground support rod piece, which comprises a steel bracket, a pressing component and a supporting component which are arranged on the steel bracket, and a pressure sensor for detecting pressure, wherein the steel bracket is provided with a plurality of support rods; the steel bracket comprises two triangular steel frames which are arranged in parallel and a connecting beam for connecting three vertexes corresponding to the two triangular steel frames; the triangular steel frame comprises two inclined beams and a bottom beam which is horizontally arranged; the connecting beam comprises a counter-force beam for connecting the intersection points of the inclined beams and a reinforcing beam for connecting the intersection points of the inclined beams and the bottom beam; the pressing component is arranged on the counter-force beam; the supporting component comprises two supporting seats and supporting blocks, wherein the two supporting seats span and are attached to the two bottom beams, the supporting blocks are movably connected between the two bottom beams, and the upper surfaces of the supporting seats and the supporting blocks are located at the same height. According to the utility model, the bending resistance and the compressive strength test of the rod piece to be tested can be realized according to whether the supporting block is installed or not; and when the compression resistance and bending strength test are switched, other parts do not need to be replaced, so that the detection efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of strength detection devices, in particular to a bending and compressive strength testing device for a mine underground support rod piece.
Background
Mining is an indispensable industry in national development, and with the increasing demand of China for ores, ore mining under some complex geological conditions has become a standardized scenario for mining. Tunnel supporting is often carried out in a shed type supporting mode under complex geological conditions to support extremely crushed ore rocks in a crushing zone. The shed type support mainly comprises steel arches, wood back wood and other rod pieces. Under the conditions of high stress and other complex geological conditions, the strength characteristics such as bending resistance, compressive strength and the like of the support rod piece are extremely important for the stability and bearing performance of the support body, and if the stability and bearing performance of the support rod piece are not up to the standard, the support body is likely to be unstable, so that safety accidents are caused. Therefore, the detection of the bending resistance and the compressive strength of the support rod piece is an effective means for avoiding the occurrence of safety accidents.
The initial bending and compressive strength tests of the support rod member need to be performed by a bending strength testing device and a compressive strength testing device, respectively, which increase the complexity and cost of the testing to some extent. In order to solve the problem, the patent with the application number of CN201821626410.7 discloses a building material strength detection device, which comprises a base, a first support plate, a lower shear body, a support rod, a second support plate, a shell, a hydraulic cylinder, a connecting plate, an upper shear body, a protective cover, a recovery hole, a support leg, a damping component, a recovery box, a structural box, a V-shaped seat, a third mounting plate, a pressing edge, a lower pressing block and an upper pressing block. The device can realize bending resistance and compressive strength's detection simultaneously, but when carrying out bending resistance and compressive strength test, need change to corresponding detection component, when carrying out bending resistance and compressive strength's switching, need all carry out corresponding change with the part that awaits measuring the body from top to bottom, complex operation, detection efficiency is low.
In view of the foregoing, there is a need for an improved flexural and compressive strength testing device for mine underground support rods that addresses the above-described problems.
Disclosure of Invention
The utility model aims to provide a bending and compressive strength testing device for a mine underground support rod piece, which can simultaneously realize the bending and compressive strength testing of the rod piece to be tested according to the installation or not of a support block by arranging the support seat and the support block and movably connecting the support block between bottom beams; meanwhile, when the compression strength and the bending strength are tested and switched, other parts are not required to be replaced, and the detection efficiency is improved.
In order to achieve the above purpose, the utility model provides a bending and compressive strength testing device for a mine underground support rod piece, which comprises a steel bracket, a pressing component and a supporting component which are arranged on the steel bracket, and a pressure sensor for detecting pressure;
the steel support comprises two triangular steel frames which are arranged in parallel and a connecting beam for connecting three vertexes corresponding to the two triangular steel frames; the triangular steel frame comprises two inclined beams and a bottom beam which is horizontally arranged; the connecting beam comprises a counter-force beam arranged between the two triangular steel frames and used for connecting intersection points formed by the two inclined beams and a reinforcing beam used for connecting intersection points formed by the inclined beams and the bottom beam; the pressing component is arranged on the counter-force beam; the support assembly comprises two support seats which are spanned and attached to the two bottom beams and a support block which is movably connected between the two bottom beams; the supporting blocks are arranged between the two supporting seats and located right below the pressing component, and the supporting seats and the upper surfaces of the supporting blocks are located at the same height.
As a further improvement of the utility model, the reinforcing blocks are arranged below the reinforcing beams and the supporting blocks; the reinforcing blocks below the supporting blocks are provided with baffle plates on two sides of the bottom beam in the length direction, and the supporting blocks are arranged between the baffle plates.
As a further improvement of the utility model, the support seat is connected to the bottom beam in a sliding manner;
the bottom beam is of an I-shaped structure and comprises an upper bottom beam, a lower bottom beam and a vertical bottom beam connected with the upper bottom beam and the lower bottom beam; the support seats comprise an upper support seat which spans and is attached to the upper surfaces of the upper bottom beams of the two bottom beams and two lower support seats which are respectively attached to the lower surfaces of the upper bottom beams of the two bottom beams; the length of the upper supporting seat is larger than the distance between the farthest ends of the two upper bottom beams; the two lower supporting seats are respectively positioned at two ends of the upper supporting seat; the upper supporting seat and the lower supporting seat are provided with corresponding through holes and first screws penetrating through the through holes.
As a further improvement of the utility model, the supporting seat further comprises a group of limiting plates which are connected to the upper supporting seat in a sliding way;
the limiting plate is of an L-shaped structure and comprises a vertical limiting plate and a horizontal limiting plate; the upper supporting seat is fixedly provided with a second screw, and the horizontal limiting plate is provided with a strip-shaped hole for the second screw to pass through.
As a further improvement of the utility model, the pressing component comprises a fixing frame and a jack which is reversely hung in the fixing frame.
As a further improvement of the utility model, the fixing frame comprises a suspension plate, a fixing plate arranged below the suspension plate and a plurality of uniformly arranged suspension screw rods for connecting the suspension plate and the fixing plate; the suspension plate is positioned on the upper surface of the counter-force beam; one end of the jack is tightly attached to the lower surface of the counter-force beam, the other end of the jack is fixed on the fixed plate, and meanwhile, the jack is positioned among the plurality of hanging screw rods; the fixed plate is provided with a notch for the loading end of the jack to pass through.
As a further improvement of the utility model, the hanging screw rod is a threaded screw rod; one end of the threaded screw rod is fixedly connected with the fixed plate, the other end of the threaded screw rod is movably connected with the suspension plate, and a nut is arranged at the joint of the suspension plate and the threaded screw rod.
As a further improvement of the utility model, an adjusting gasket is arranged between the counter-force beam and the jack.
As a further improvement of the utility model, the triangular steel frame is an isosceles triangle; and a supporting beam is arranged between the intersection point formed by the two inclined beams of each triangular steel frame and the midpoint of the bottom beam.
As a further improvement of the utility model, the bending and compressive strength testing device for the underground mine support rod piece further comprises a data storage module and a plurality of displacement sensors electrically connected with the data storage module; the pressure sensor is electrically connected with the data storage module.
The beneficial effects of the utility model are as follows:
(1) According to the bending and compressive strength testing device for the underground mine support rod piece, firstly, the support seat and the support block are arranged, and the support block is movably connected between the bottom beams, so that the bending and compressive strength testing of the rod piece to be tested can be simultaneously realized according to whether the support block is installed or not, and the application range of the device is improved; secondly, supporting shoe swing joint is between the floorbar, and its installation and removal convenient and fast can realize the switching of resistance to compression and bending strength test through quick installation or take off the supporting shoe, need not to change other parts, reduces the loaded down with trivial details step of changing the part, improves detection efficiency, has reduced the cost, convenient to use.
(2) According to the bending resistance and compressive strength testing device for the underground mine support rod piece, the supporting seats are connected to the bottom beam in a sliding manner, and the distance between the two supporting seats can be adjusted according to the length of the rod piece to be tested; meanwhile, the support seat is provided with the limiting plates which are in sliding connection, the distance between a group of limiting plates can be adjusted according to the thickness of the rod piece to be tested, and the horizontal limiting plates can also position the rod piece to be tested and fix the rod piece to be tested, so that the rod piece to be tested is prevented from shifting in the pressurizing process. The device can realize the firm centre gripping to the member bar that awaits measuring of different diameters, length, cross-section shape, and need not to change anchor clamps, further reduced the cost.
(3) According to the bending resistance and compressive strength testing device for the underground mine support rod piece, the hanging screw rod is set to be the threaded screw rod, the nut is arranged at the joint of the hanging plate and the threaded screw rod, the distance between the hanging plate and the fixed plate can be adjusted by adjusting the nut, the adjusting gaskets are additionally arranged between the tail part of the jack and the counter-force beam, and the loading end of the jack can be always kept in the range of travel when rod pieces to be tested with different sizes are tested by increasing or reducing the number of the adjusting gaskets.
Drawings
Fig. 1 is a perspective view of the bending and compressive strength testing apparatus for a mine underground support rod of the present utility model.
Fig. 2 is an enlarged view of a in fig. 1.
Fig. 3 is a schematic view of the limiting plate in fig. 1.
Fig. 4 is a cross-sectional view of the movable connection of the support block and the reinforcement block of fig. 1.
Fig. 5 is a schematic view of the connection of the hold-down assembly of fig. 1 to a reaction beam.
Fig. 6 is a schematic view of the pressing assembly of fig. 1 during the application of pressure.
Fig. 7 is a schematic diagram of the bending and deflection test performed by the bending and compressive strength test device for the underground mine support rod of the present utility model.
Reference numerals
1-a steel bracket; 2-pressing down the assembly; 3-a support assembly; 4-a pressure sensor; 5-reinforcing blocks; 6-a data storage module; 7-a displacement sensor; 8-a rod piece to be tested; 9-reinforcing columns; 10-upper tabletting; 11-triangle steel frame; 12-connecting beams; 21-a fixing frame; 22-jack; 31-a supporting seat; 32-supporting blocks; 51-a baffle; 111-diagonal beams; 112-a bottom beam; 113-supporting beams; 121-a reaction beam; 122-reinforcing the beam; 211-suspending a plate; 212-fixing plates; 213-hanging a screw rod; 311-upper supporting seat; 312-lower support base; 313-first screw; 314-limiting plates; 315-a second screw; 1121-an upper sill; 1122-lower sill; 1123-vertical bottom beams; 3141—vertical limiting plates; 3142-horizontal limiting plates; 3143-bar-shaped holes; 3144-reinforcing plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present utility model due to unnecessary details, only structures and/or processing steps closely related to aspects of the present utility model are shown in the drawings, and other details not greatly related to the present utility model are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1 to 6, the present utility model provides a bending and compressive strength testing apparatus for a mine underground support rod, which comprises a steel bracket 1, a pressing component 2 and a supporting component 3 arranged on the steel bracket 1, and a pressure sensor 4 for detecting pressure.
The steel bracket 1 comprises two triangular steel frames 11 which are arranged in parallel and a connecting beam 12 which is used for connecting three vertexes corresponding to the two triangular steel frames 11; the triangular steel frame 11 comprises two inclined beams 111 and a bottom beam 112 which is horizontally arranged; the connecting beam 12 includes a reaction beam 121 provided between the two triangular steel frames 11 for connecting the intersection points formed by the two diagonal beams 111, and a reinforcing beam 122 for connecting the intersection points formed by the diagonal beams 111 and the bottom beam 112. The hold-down assembly 2 is disposed on the reaction beam 121. The support assembly 3 comprises two support seats 31 which are spanned and attached on the two bottom beams 112 and a support block 32 which is movably connected between the two bottom beams 112; the supporting block 32 is disposed between the two supporting seats 31 and located right below the pressing assembly 2, and the supporting seats 31 and the upper surfaces of the supporting blocks 32 are located at the same height. Specifically, when the compressive strength test is performed, the rod 8 to be tested is placed on the two supporting seats 31 and the supporting block 32, pressure is applied to the rod 8 to be tested through the pressing component 2, and the applied pressure value is recorded through the pressure sensor 4, so that the compressive strength of the rod 8 to be tested is recorded; when the bending strength test is performed, the supporting blocks 32 are detached by using a three-point bending method, at this time, the rod piece 8 to be tested is placed on the two supporting seats 31, the lower part of the middle part is suspended, the pressure is applied to the rod piece 8 to be tested through the pressing component 2, and the applied pressure value is recorded through the pressure sensor 4, so that the bending strength of the rod piece 8 to be tested is recorded. The device provided by the application can simultaneously realize the bending resistance and compressive strength test of the rod piece 8 to be tested, and the application range of the device is improved; secondly, the switching between the compression resistance and the bending strength test can be realized by quickly installing or removing the supporting block 32, and other parts are not required to be replaced, so that the detection efficiency is improved.
The support seat 31 is slidably connected to the bottom beam 112. As shown in fig. 1, the bottom beam 112 has an i-shaped structure including an upper bottom beam 1121, a lower bottom beam 1122, and a vertical bottom beam 1123 connecting the upper bottom beam 1121 and the lower bottom beam 1122. The support base 31 includes an upper support base 311 that spans and fits over the upper surfaces of the upper bottom beams 1121 of the two bottom beams 112, and two lower support bases 312 that respectively fit over the lower surfaces of the upper bottom beams 1121 of the two bottom beams 112. The length of the upper supporting seat 311 is longer than the distance between the farthest ends of the two upper bottom beams 1121, and the two lower supporting seats 312 are respectively positioned at two ends of the upper supporting seat 311; specifically, as shown in fig. 2, the ends of the upper support base 311 and the lower support base 312 protrude a part with respect to the upper bottom beam 1121, and the upper bottom beam 1121 is sandwiched between the upper support base 311 and the lower support base 312. The upper support seat 311 and the lower support seat 312 are provided with corresponding through holes and first screws 313 penetrating through the through holes, and the positions of the support seats 31 can be adjusted by adjusting the tightness of the first screws 313: when the position of the supporting seat 31 needs to be adjusted, the first screw 313 is loosened by the adjusting nut, so that the clamping force of the upper supporting seat 311 and the lower supporting seat 312 to the upper bottom beam 1121 is reduced, and the supporting seat 31 slides on the upper bottom beam 1121, thereby realizing the adjustment of the position of the supporting seat 31. So set up, can be according to the length adjustment of member 8 that awaits measuring between two supporting seats 31, further improve the range of application of the device that this application provided.
The supporting seat 31 further comprises a set of limiting plates 314 slidably connected to the upper supporting seat 311. The limiting plate 314 has an L-shaped structure, including a vertical limiting plate 3141 and a horizontal limiting plate 3142. As shown in fig. 2 and 3, a second screw 315 is fixed on the upper support seat 311, a bar-shaped hole 3143 through which the second screw 315 passes is provided on the horizontal limiting plate 3142, and the position of the limiting plate 314 can be adjusted by adjusting the tightness of the second screw 315: when the position of the limiting plate 314 needs to be adjusted, the second screw 315 is loosened through the adjusting nut, so that the friction force between the limiting plate 314 and the upper supporting seat 31 is reduced, the limiting plate 314 slides on the upper supporting seat 31, and the position of the limiting plate 314 is adjusted. By the arrangement, the distance between a group of limiting plates 314 can be adjusted according to the thickness of the rod piece 8 to be detected, so that the application range of the device provided by the application is further improved; meanwhile, the horizontal limiting plate 3142 can also position the rod piece 8 to be tested, fix the rod piece 8 to be tested and prevent the rod piece 8 to be tested from shifting in the pressurizing process.
In some embodiments, a reinforcing plate 3144 is further disposed between the vertical limiting plate 3141 and the horizontal limiting plate 3142, and one end of the reinforcing plate 3144 is connected to the vertical limiting plate 3141, and the other end is connected to the horizontal limiting plate 3142, so as to further reinforce the strength of the limiting plate 314.
The support block 32 is movably connected between two bottom beams 112. As shown in fig. 1, the reinforcing blocks 5 are disposed below the reinforcing beams 122 and the supporting blocks 32, and the reinforcing blocks 5 and the reinforcing beams 122 are connected by reinforcing columns 9. As shown in fig. 4, the reinforcing blocks 5 located below the supporting blocks 32 are provided with the blocking pieces 51 on both sides in the longitudinal direction of the bottom beam 112, and the supporting blocks 32 are disposed between the blocking pieces 51. So configured, firstly, the detachment and installation of the support block 32 can be rapidly achieved through the movable connection; secondly, the baffle plate 51 can limit the supporting block 32, so that the supporting block 32 is prevented from shifting in the pressurizing process, and the detection result is affected; the presence of the reinforcing block 5 enables the whole device to be more stable. The supporting block 32 is preferably clamped between the two blocking pieces 51, and the width of the supporting block 32 is equal to the distance between the two blocking pieces 51.
In order to further improve the stability and balance of the whole device, the triangular steel frame 11 is preferably an axisymmetric structure of isosceles triangle. Meanwhile, a supporting beam 113 is arranged between an intersection point formed by the two inclined beams 111 of each triangular steel frame 11 and the midpoint of the bottom beam 112. The support beam 113 may pass through the bottom beam 112 and extend downward until it is flush with the lower surface of the reinforcing block 5. At this time, the blocking pieces 51 on both sides of the reinforcing block 5 and the supporting beams 113 on both sides form a space for accommodating the supporting block 32.
The materials of the steel bracket 1, the supporting component 3, the reinforcing block 5 and the reinforcing column 9 are all high-strength steel materials, and the device is stable in the testing process and cannot be crushed by the rod piece 8 to be tested. The various beams of the steel bracket 1 can all adopt an I-shaped structure.
The pressing assembly 2 comprises a fixing frame 21 and a jack 22 which is inversely hung in the fixing frame 21.
As shown in fig. 1 and 5, the fixing frame 21 includes a suspension plate 211, a fixing plate 212 disposed below the suspension plate 211, and a plurality of uniformly arranged suspension screws 213 for connecting the suspension plate 211 and the fixing plate 212, preferably four suspension screws 213, and the jack 22 is located between the four suspension screws 213. The suspension plate 211 is positioned on the upper surface of the reaction beam 121; one end of the jack 22 is tightly attached to the lower surface of the reaction beam 121 (a load is applied to the rod 8 to be tested by the action of the reaction beam 121), and the other end is fixed on the fixed plate 212; the fixed plate 212 is provided with a notch (fig. 6 is a schematic view of the loading end of the jack 22 being pressed down) through which the loading end of the jack 22 passes, and the size of the notch is consistent with the size of the loading end of the jack 22. The jack 22 will not deflect throughout the test, maintaining consistency and stability of the loading direction.
The jack 22 is a hydraulic jack with a manual or electric loading mode, the stroke is not less than 15mm, preferably 20-30mm, and the range is 5-30t, preferably 10t. The range of the pressure sensor 4 is matched with the range of the jack 22.
Preferably, the hanging screw 213 is a threaded screw. One end of the threaded screw rod is fixedly connected with the fixed plate 212, the other end of the threaded screw rod is movably connected with the suspension plate 211, a nut is arranged at the joint of the suspension plate 211 and the threaded screw rod, and the distance between the suspension plate 211 and the fixed plate 212 can be adjusted by adjusting the nut. The jack 22 is firmly fixed by the cooperation of the nut and the threaded screw. When the size of the rod 8 to be detected is smaller, and the travel range of the jack 22 cannot be successfully detected, the jack 22 and the threaded screw rod can be taken down by unscrewing the nut, and after an adjusting gasket is additionally arranged between the tail part of the jack 22 and the counter-force beam 121, the nut is screwed down again, so that the jack 22 is firmly fixed. By adjusting the increase or decrease of the number of the gaskets, the loading end of the jack 22 can be always kept in the range of travel when the rod pieces 8 to be tested with different sizes are tested.
The bending and compressive strength testing device for the underground mine support rod piece further comprises a data storage module 6 and a plurality of displacement sensors 7 electrically connected with the data storage module 6; the pressure sensor 4 is electrically connected to a data storage module 6. The pressure sensor 4 is preferably a spoke-type pressure sensor for measuring the pressure applied to the rod 8 to be measured during the detection process. The displacement sensor 7 is preferably an lvdt linear displacement sensor and is used for measuring the deflection of different positions of the rod piece 8 to be measured. The data storage module 6 is preferably a paperless recorder, and the paperless recorder has a multichannel synchronous acquisition function, and can store and record the data acquired by the data acquisition module so as to be convenient for a user to read. The displacement sensor 7 and the pressure sensor 4 form a data acquisition module together, the data acquisition module feeds back acquired data to the data storage module 6, and a required detection result can be inquired through the data storage module 6. The pressure sensor 4 and the displacement sensor 7 are uniformly matched with the stroke and the measuring range of the jack 22.
As shown in fig. 7, in the bending and compressive strength detection, the pressure sensor 4 is disposed between the rod 8 to be detected and the loading end of the jack 22, and the load applied by the jack 22 is measured by the pressure sensor 4, and the pressure sensor 4 is not crushed because the measuring range of the pressure sensor 4 is matched with the measuring range of the jack 22. Meanwhile, in the detection process, the upper pressing sheet 10 is disposed between the pressure sensor 4 and the rod 8 to be detected (because the loading end area of the jack 22 is limited, when the diameter of the rod 8 to be detected is large, the detection effect may be affected), so that the pressure applied by the jack 22 can be uniformly applied to the rod 8 to be detected, so as to improve the detection effect. When bending strength detection is carried out, the displacement sensors 7 can be uniformly arranged below the rod piece 8 to be detected, and deflection change of the rod piece 8 to be detected can be measured while bending strength is tested. The displacement sensor 7 is preferably arranged at 1/4, 1/2 and 3/4 of the test span of the lever 8 to be tested (i.e. the portion between the two support seats 31).
The working principle of the bending resistance and compressive strength testing device for the underground mine support rod piece is as follows: when the compressive strength is detected, the rod piece 8 to be detected needs to be stressed on the upper surface and the lower surface, so that the supporting seat 31 and the supporting block 32 need to work simultaneously; the compressive strength is detected by a three-point bending method, and a certain amount of lifting is needed below the rod 8 to be detected, so that the supporting block 32 needs to be removed. Specifically, the present utility model relates to a method for manufacturing a semiconductor device.
When the compressive strength test of the rod piece 8 to be tested is carried out, the two supporting seats 31 are firstly adjusted to the proper positions according to the length of the rod piece 8 to be tested, meanwhile, the limiting plates 314 are adjusted to the proper distances, then the rod piece 8 to be tested is placed on the supporting seats 31 and the supporting blocks 32, the distance between the limiting plates 314 is adjusted to clamp the rod piece 8 to be tested, and the fixation of the rod piece 8 to be tested is completed; then, the upper pressing sheet 10 and the pressure sensor 4 are sequentially placed on the rod piece 8 to be tested from bottom to top, the loading end of the jack 22 is controlled to slowly and uniformly act through the manual pressing rod, the loading end of the jack 22 is ensured to be well acted on the pressure sensor 4, the load is continuously applied to the rod piece 8 to be tested, the pressure value of the load is recorded through the pressure sensor 4, the detection of the compressive strength of the rod piece 8 to be tested is realized, and the detection result is recorded and stored on the data storage module 6.
When the bending strength test of the rod piece 8 to be tested is carried out, firstly, the supporting blocks 32 are removed, then the two supporting seats 31 are adjusted to proper positions according to the length of the rod piece 8 to be tested, meanwhile, the limiting plates 314 are adjusted to proper distances, then the rod piece 8 to be tested is placed on the supporting seats 31 and the supporting blocks 32, and the distance between the limiting plates 314 is adjusted to clamp the rod piece 8 to be tested, so that the fixation of the rod piece 8 to be tested is completed; then, placing the displacement sensor 7 at 1/4, 1/2 and 3/4 of the test span (namely the part between the two supporting seats 31) of the rod piece 8 to be tested, ensuring that the detection end of the displacement sensor 7 works normally, ensuring that the initial indication value is positive, and ensuring that the displacement sensor 7 can always be in a normal working range (subtracting the initial value when processing data, re-establishing the zero point position and obtaining a variation value); then, the upper pressing sheet 10 and the pressure sensor 4 are sequentially placed on the rod piece 8 to be tested from bottom to top, the loading end of the jack 22 is controlled to slowly move at a constant speed through the manual pressing rod, the loading end of the jack 22 is ensured to be well acted on the pressure sensor 4, the load is continuously applied to the rod piece 8 to be tested, the pressure value of the load is recorded through the pressure sensor 4, the bending strength of the rod piece 8 to be tested is detected, meanwhile, the displacement change is recorded through the displacement sensor 7, the deflection detection is realized, and the detection result is recorded and stored on the data storage module 6.
In summary, according to the bending and compressive strength testing device for the underground mine support rod provided by the utility model, firstly, the supporting seat and the supporting block are arranged, and the supporting block is movably connected between the bottom beams, so that the bending and compressive strength testing of the rod to be tested can be simultaneously realized according to whether the supporting block is installed or not, and the application range of the device is improved; secondly, supporting shoe swing joint is between the floorbar, and its installation and removal convenient and fast can realize the switching of resistance to compression and bending strength test through quick installation or take off the supporting shoe, need not to change other parts, reduces the loaded down with trivial details step of changing the part, improves detection efficiency, has reduced the cost, convenient to use.
The above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model.
Claims (10)
1. The bending and compressive strength testing device for the underground mine support rod piece is characterized by comprising a steel bracket, a pressing component and a supporting component which are arranged on the steel bracket, and a pressure sensor for detecting pressure;
the steel support comprises two triangular steel frames which are arranged in parallel and a connecting beam for connecting three vertexes corresponding to the two triangular steel frames; the triangular steel frame comprises two inclined beams and a bottom beam which is horizontally arranged; the connecting beam comprises a counter-force beam arranged between the two triangular steel frames and used for connecting intersection points formed by the two inclined beams and a reinforcing beam used for connecting intersection points formed by the inclined beams and the bottom beam; the pressing component is arranged on the counter-force beam; the support assembly comprises two support seats which are spanned and attached to the two bottom beams and a support block which is movably connected between the two bottom beams; the supporting blocks are arranged between the two supporting seats and located right below the pressing component, and the supporting seats and the upper surfaces of the supporting blocks are located at the same height.
2. The bending and compressive strength testing apparatus for mine underground support bars of claim 1, wherein the reinforcing blocks are provided below both the reinforcing beam and the support block; the reinforcing blocks below the supporting blocks are provided with baffle plates on two sides of the bottom beam in the length direction, and the supporting blocks are arranged between the baffle plates.
3. The bending and compressive strength testing apparatus for mine shaft support bars of claim 1, wherein said support base is slidably connected to said bottom beam;
the bottom beam is of an I-shaped structure and comprises an upper bottom beam, a lower bottom beam and a vertical bottom beam connected with the upper bottom beam and the lower bottom beam; the support seats comprise an upper support seat which spans and is attached to the upper surfaces of the upper bottom beams of the two bottom beams and two lower support seats which are respectively attached to the lower surfaces of the upper bottom beams of the two bottom beams; the length of the upper supporting seat is larger than the distance between the farthest ends of the two upper bottom beams; the two lower supporting seats are respectively positioned at two ends of the upper supporting seat; the upper supporting seat and the lower supporting seat are provided with corresponding through holes and first screws penetrating through the through holes.
4. The bending and compressive strength testing apparatus for mine shaft support bars of claim 3, wherein said support base further comprises a set of limiting plates slidably connected to said upper support base;
the limiting plate is of an L-shaped structure and comprises a vertical limiting plate and a horizontal limiting plate; the upper supporting seat is fixedly provided with a second screw, and the horizontal limiting plate is provided with a strip-shaped hole for the second screw to pass through.
5. The bending and compressive strength testing apparatus for mine shaft support bars of claim 1, wherein said hold-down assembly comprises a mount and a jack inverted in said mount.
6. The bending and compressive strength testing apparatus for mine underground support rods of claim 5, wherein said fixture comprises a hanger plate, a fixed plate disposed below said hanger plate, and a plurality of uniformly disposed hanger screws for connecting said hanger plate and said fixed plate; the suspension plate is positioned on the upper surface of the counter-force beam; one end of the jack is tightly attached to the lower surface of the counter-force beam, the other end of the jack is fixed on the fixed plate, and meanwhile, the jack is positioned among the plurality of hanging screw rods; the fixed plate is provided with a notch for the loading end of the jack to pass through.
7. The bending and compressive strength testing apparatus for mine underground support bars of claim 6, wherein said hanging screw is a threaded screw; one end of the threaded screw rod is fixedly connected with the fixed plate, the other end of the threaded screw rod is movably connected with the suspension plate, and a nut is arranged at the joint of the suspension plate and the threaded screw rod.
8. The bending and compressive strength testing apparatus for mine underground support bars of claim 7, wherein an adjusting spacer is provided between the counter-force beam and the jack.
9. The bending and compressive strength testing apparatus for mine underground support bars of claim 1, wherein the triangular steel frame is isosceles triangle; and a supporting beam is arranged between the intersection point formed by the two inclined beams of each triangular steel frame and the midpoint of the bottom beam.
10. The bending and compressive strength testing apparatus for a mine underground support bar of claim 1, further comprising a data storage module and a plurality of displacement sensors electrically connected to the data storage module; the pressure sensor is electrically connected with the data storage module.
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| CN202321829996.8U CN220419028U (en) | 2023-07-12 | 2023-07-12 | Bending and compressive strength testing device for underground mine supporting rod piece |
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| CN202321829996.8U CN220419028U (en) | 2023-07-12 | 2023-07-12 | Bending and compressive strength testing device for underground mine supporting rod piece |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118168747A (en) * | 2024-05-16 | 2024-06-11 | 江苏兰蒂斯木业有限公司 | Wood system structural beam bearing strength detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118168747A (en) * | 2024-05-16 | 2024-06-11 | 江苏兰蒂斯木业有限公司 | Wood system structural beam bearing strength detection device |
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