CN211317974U - Displacement meter protective bracket and simply supported beam bending test device - Google Patents
Displacement meter protective bracket and simply supported beam bending test device Download PDFInfo
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- CN211317974U CN211317974U CN201922210643.XU CN201922210643U CN211317974U CN 211317974 U CN211317974 U CN 211317974U CN 201922210643 U CN201922210643 U CN 201922210643U CN 211317974 U CN211317974 U CN 211317974U
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Abstract
The utility model relates to a displacement meter protective cradle and simply supported roof beam flexural test device, wherein displacement meter protective cradle includes the support frame and locates the steel sheet on the support frame, the support frame includes along two channel-section steel girder steels of horizontal distribution and two at least bracing pieces of fixing on every channel-section steel girder steel, two the channel-section steel girder steels all extend along the longitudinal direction, the steel sheet sets firmly in the top of bracing piece, the middle part of steel sheet has the through-hole that supplies the displacement meter to pass; still include simply supported roof beam flexural test device. The utility model has the advantages that: when the displacement meter is used, the displacement meter is installed below the displacement meter protection support, the displacement meter protection support is fixed below the fatigue testing machine, the measuring rod of the displacement meter penetrates through a through hole in the steel plate to abut against the simple beam for measurement, when the simple beam breaks, the measuring rod of the displacement meter retracts downwards, the simple beam is smashed on the steel plate of the protection support, and therefore the displacement meter is prevented from being damaged, and the displacement meter is simple and practical.
Description
Technical Field
The utility model relates to a test device among the building field, in particular to displacement meter protective cradle and simply supported roof beam flexural test device.
Background
The simply supported beam bending test is one of important methods for testing the performance of a structural member, wherein deflection deformation is an indispensable index for evaluating the mechanical performance of the structural member, and displacement measurement equipment such as a displacement meter or a dial indicator is usually placed at the lower part of the structural member to acquire deflection deformation data in real time. Fatigue testing machine is the main equipment in the simple beam performance test, fatigue testing machine is generally including fixing two stands of transverse arrangement on the test bench, the setting is the crossbearer on the stand, the middle part of crossbearer sets up hydraulic push rod, two supporting seats along longitudinal arrangement on the test bench, when experimental, the simple beam overlap joint is on two supporting seats, then the upper surface of operation hydraulic push rod roof pressure simple beam downwards, paste various sensors on the simple beam, the below of simple beam is located to the displacement meter, but the displacement meter mainly includes the shell and locates the axial displacement's in the shell measuring stick, the lower surface of simple beam is withstood to the upper end of measuring stick, measure the deformation range of simple beam in the experimentation. In the existing laboratory test process, the damage of the simply supported beam is often uncertain, when the component with large weight is broken suddenly and falls due to insufficient bearing capacity, the displacement measuring equipment with high lower part cost is damaged, the price of the displacement meter is hundreds of thousands, the cost expenditure of a laboratory is greatly increased, and how to prevent the displacement meter from being broken by smashing when the simply supported beam is broken is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
The utility model provides a displacement meter protective cradle to solve present when the simple beam roof beam is cracked, prevent that the displacement meter from being pounded bad technical problem.
The utility model adopts the following technical scheme:
the utility model provides a displacement meter protective cradle, includes the support frame and locates the steel sheet on the support frame, and the support frame includes two channel-section steel girder steels along transverse distribution and sets firmly two at least bracing pieces on every channel-section steel girder steel, two the channel-section steel girder steel all extends along longitudinal direction, and the steel sheet sets firmly in the top of bracing piece, and the middle part of steel sheet has the through-hole that supplies the displacement meter to pass.
Preferably, the bracing piece has four, sets up two on being located four angles of steel sheet and every channel-section steel girder steel respectively the upper end welded fastening of every bracing piece is on the steel sheet, and the lower extreme welded fastening of every bracing piece is on the last pterygoid lamina that corresponds the channel-section steel girder steel.
Preferably, the bracing piece has four, is located four angles of steel sheet and sets up two on every channel-section steel girder steel respectively the bracing piece, the both ends of every bracing piece all set up the external screw thread, and the upper end of every bracing piece is inserted and is established on the steel sheet and establish soon through the nut of both sides about the steel sheet fixedly, and the lower extreme of every bracing piece is inserted and is established on the last pterygoid lamina that corresponds the channel-section steel girder steel and establish soon through the nut of both sides about the last pterygoid lamina fixedly, and the thread length of bracing piece lower extreme is longer than the vertical length of last.
Preferably, the device also comprises a displacement meter fixing mechanism, wherein the displacement meter fixing mechanism comprises two electromagnets, a power supply and a plurality of conducting wires, two electricity connection plates and the mount of connecting two electro-magnets, the electro-magnet has the plastic casing, two electricity of the coil of electro-magnet are connected the contact and are set up on the shell top surface, the electricity connection plate is including fixing the insulation board on iron plate lower surface and locating two on the insulation board be used for with correspond the electric connection contact piece of being connected, the electric magnet is drawn forth through the wire to electricity connection contact piece, a power supply, wire and electricity connection plate form a series circuit, the mount is including fixing the connecting rod on two electro-magnet shells, the free end an organic whole of every connecting rod sets up C shape clamp, the free end of C shape clamp all has the edge of turning up, two C shape clamps form one be used for holding the staple bolt of displacement meter shell and pass through the staple bolt of.
Preferably, two hanging baskets for receiving the electromagnet are further arranged below the iron plate, an annular connecting surface is arranged at the top of each hanging basket and fixed on the bottom surface of the iron plate through the connecting surface, and the insulating plate is arranged in the corresponding annular connecting surface.
Simple beam test device that bends, including the test bench, locate the fatigue testing machine on the test bench and locate the displacement meter protective cradle of fatigue testing machine below, the test bench is along two recesses that are "protruding" style of calligraphy of cross section along longitudinal extension of transverse distribution, sets up fixing bolt in the recess, and the width of recess notch is less than the width of bolt lower extreme tip, and fixing bolt's upper end is passed the lower aerofoil of channel-section steel girder and is realized the channel-section steel girder fixed on the test bench through the nut.
The utility model has the advantages that: when the displacement meter is used, the displacement meter is installed below the displacement meter protection support, the displacement meter protection support is fixed below the fatigue testing machine, the measuring rod of the displacement meter penetrates through a through hole in the steel plate to abut against the simple beam for measurement, when the simple beam breaks, the measuring rod of the displacement meter retracts downwards, the simple beam is smashed on the steel plate of the protection support, and therefore the displacement meter is prevented from being damaged, and the displacement meter is simple and practical.
Furthermore, the two ends of the supporting rod are provided with external threads, the thread length of the lower end of the supporting rod is longer than the vertical length of the through hole of the upper wing plate, so that the height of the steel plate can be adjusted by adjusting the length of the telescopic rod below the upper wing plate, and the displacement meter protecting support can be suitable for simple beams with more heights.
Furthermore, for some use scenes, such as the situation that the height of the displacement meter protective bracket cannot be adjusted, or the adjusting capacity is limited, under the condition that the simple beam is too high, the displacement meter shell has to be extended upwards out of the iron plate together to meet the requirement that the measuring rod contacts the lower surface of the simple beam, in order to avoid the damage of the displacement meter when the simple beam is broken, the scheme skillfully designs a series circuit, the attraction force between the electromagnet and the iron plate is slightly larger than the sum of the gravity of the displacement meter fixing mechanism and the gravity of the displacement meter by adjusting the current, the thread of the displacement meter shell is still in the measuring process, the measuring precision is ensured, when the simple beam is broken and then is hammered to the top of the displacement meter shell, once the sum of the set maximum magnetic force is exceeded, namely the total attraction force is exceeded, the electric connection contact is separated from the electric connection contact piece, and once the magnetic force is separated, the magnetic, the displacement meter fixing mechanism only bears the action of gravity, is similar to the free fall state, and the cracked simple beam can not continue to apply pressure to the displacement meter, and the displacement meter fixing mechanism drops on the test bench, and only the sponge needs to be laid, so that the displacement meter can be guaranteed to be intact and ingenious.
Furthermore, two hanging baskets for accommodating the electromagnet are arranged below the iron plate, the electromagnet hanging baskets directly fall into the hanging baskets after falling off, the displacement meter is further prevented from being damaged, and a buffer does not need to be laid on the test bed.
The simply supported beam bending test device has the advantages that the displacement meter protection support with the structure is arranged, so that the displacement meter is well protected, and property and time loss caused by damage of the displacement meter are saved.
Drawings
Fig. 1 is a schematic longitudinal structural view of a displacement meter protective bracket of the present invention;
FIG. 2 is a schematic top view of the electromagnet and the fixing frame;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
fig. 4 is a schematic diagram of a series circuit in a displacement meter protective bracket according to the present invention;
fig. 5 is a schematic structural diagram of a hanging basket in a displacement meter protective bracket of the present invention;
fig. 6 another schematic structural diagram of the displacement meter protective bracket of the present invention
Fig. 7 the utility model discloses a vertical structure schematic diagram of simply supported beam flexural test device.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
An embodiment of a displacement meter protection bracket is disclosed, as shown in fig. 1-5, comprising a support frame and a steel plate 8 arranged on the support frame, wherein the support frame comprises a first channel steel beam 1 and a second channel steel beam 34 which are transversely distributed, and a first support rod 6 and a second support rod 17 which are fixedly arranged on each channel steel beam, the two channel steel beams extend along the longitudinal direction, the steel plate is fixedly arranged above the support rods, the middle part of the steel plate is provided with a through hole (not shown) for a displacement meter to pass through, in the embodiment, the two first support rods 6 and the two second support rods 17 are respectively arranged at four corners of the steel plate, two support rods are arranged on each channel steel beam and distributed along the longitudinal direction, the upper end of each support rod is provided with a first external thread 5, the lower end of each support rod is provided with a second external thread 10, the upper ends of the support rods are inserted on the steel plate, 9 establish fixedly soon, the lower extreme of first bracing piece is inserted and is established on the last pterygoid lamina 3 of first channel-section steel girder steel, the lower extreme of second bracing piece is inserted and is established on the last pterygoid lamina 18 of second channel-section steel girder steel, and establish fixedly soon through the nut 2 of both sides about the last pterygoid lamina, in order to facilitate the height of adjusting the steel sheet, the thread length of bracing piece lower extreme is longer than the vertical length of last pterygoid lamina through-hole, can adjust the bracing piece through the nut of twisting both sides about the last pterygoid lamina and rise or descend like this, and then reach the purpose of adjustment steel.
In other embodiments, for example, as shown in fig. 6, there are four support rods 37 and 38, which are respectively located at four corners of the steel plate, and two support rods are disposed on each channel steel beam, an upper end of each support rod is welded and fixed on a bottom surface of the steel plate, and a lower end of each support rod is welded and fixed on an upper wing plate of the corresponding channel steel beam.
For some use scenes, for example, the height of the displacement meter protective bracket cannot be adjusted due to the self structure, or the vertical width of the steel beam of the channel steel is limited, so that the adjustment capability is limited, under the condition that some simply-supported beams are too high, the displacement meter shell 13 has to be extended upwards out of the iron plate together to meet the requirement that the measuring rod 14 contacts the lower surface of the simply-supported beam 47, in this case, in order to avoid the displacement meter from being damaged when the simply-supported beam is broken, the scheme of the embodiment further comprises a displacement meter fixing mechanism arranged below the iron plate, the displacement meter fixing mechanism comprises two electromagnets 11 and 16, a power supply 22, a plurality of leads 20, two electric connecting plates 12 and 15 and a fixing frame for connecting the two electromagnets, the electromagnets are provided with plastic shells, the plastic shells in the embodiment are cylindrical, two sets of electric connecting contact heads 27 and 28 of the coils of the two electromagnets penetrate through the top surfaces of the respective, the electric connection plate comprises an insulation plate fixed on the lower surface of the iron plate and two electric connection contact plates arranged on the insulation plate and used for being connected with corresponding electric connection contacts, the electric connection contact plates are copper sheets 39 and 40 fixed on the lower surface of the insulation plate in a fitting mode, the insulation plate is a rubber plate and is adhered to the lower surface of the iron plate, screw holes can be formed in the iron plate in other embodiments, and the rubber plate is fixed on the iron plate through screws. The electric connection contact piece is led out through a lead 20, the lead is embedded into a rubber plate in the embodiment, the two electric connection plates are arranged in series through the lead 20, the electromagnets 11 and 16, the power supply 22, the lead 20 and the electric connection plates 12 and 16 form a series loop, the power supply can be a storage battery or can be a power supply obtained by rectifying and filtering commercial power, the fixing frame comprises connecting rods 24 and 26 fixed on two electromagnet shells, the free end of each connecting rod is integrally provided with C- shaped clamps 29 and 30, the free ends of the C-shaped clamps are respectively provided with outward turning edges 32 and 33, the two C-shaped clamps form a hoop for tightly holding the displacement meter shell 13 and are connected and fixed together through the outward turning edges through hoop bolts 31, the connecting rods and the C-shaped clamps can be aluminum products or plastic products, and can be hot-melted and inserted or bonded or integrally arranged with the electromagnet shells. Two hanging baskets 23 and 25 for bearing the electromagnet are further arranged below the iron plate, an annular connecting surface 232 is arranged at the top of each hanging basket, the connecting surface is connected with the net bag 231 through three or four lifting ropes or lifting arms 233 and is fixed on the bottom surface of the iron plate through the connecting surface of the hanging basket, the insulating plate is arranged in the corresponding annular connecting surface, and the connecting surface can be bonded on the iron plate or fixed on the iron plate through screws.
The scheme skillfully designs a series circuit, the current adjusting method is various by adjusting the current, the method is the prior art, the simplest method is to increase or decrease the number of batteries or to serially connect a slide rheostat, the repeated description is omitted, so that the electromagnet generates electromagnetic force to attract with an iron plate, the total attraction force is slightly larger than the sum of the gravity of a displacement meter fixing mechanism and the gravity of the displacement meter by adjusting, for example, exceeds the gravity by 0.1-5 Newton (set according to requirements), the embodiment is set to be 0.2 Newton, when the circuit is installed, only an electric connecting contact of the electromagnet is required to contact with an electric connecting contact piece, the circuit forms a series circuit, the displacement meter fixing mechanism can be stably adsorbed on the iron plate, in the measuring process, the thread of a displacement meter shell is kept, the measuring precision is ensured, when a simple support beam is broken and then hits the top of the displacement meter shell, once the total attraction force generated by the maximum magnetic, the electric connection contact head is separated from the electric connection contact piece, once the electric connection contact head is separated from the electric connection contact piece, the series circuit is disconnected, the magnetic force disappears instantly, the displacement meter fixing mechanism only bears the action of gravity, the state is similar to a free falling body state, the broken simply supported beam cannot continuously apply larger pressure to the displacement meter, then the simply supported beam is blocked by the iron plate, and the whole process displacement meter is small in stress and not easy to damage. In this embodiment, the iron plate below still is equipped with two hanging flower baskets that are used for accepting the electro-magnet, and the electro-magnet hanging flower basket drops in the direct hanging flower basket that falls, further prevents displacement meter damage, need not to lay the buffer on the test bench.
In other embodiments, a hanging basket is not arranged, the displacement meter fixing mechanism drops on the test bed, and the displacement meter can be ensured to be intact and skillful only by laying sponge.
An embodiment of a simply supported beam bending test device, as shown in fig. 7, including test bench 45, locate fatigue testing machine 39 on the test bench and locate the fatigue testing machine below as the above-mentioned embodiment displacement meter protective cradle, the test bench is along two along the cross sections of longitudinal extension for "protruding" style of calligraphy recesses 42, 43 of transverse distribution, set up fixing bolt 41, 44 in the recess, the width of recess notch is less than the width of bolt lower extreme tip, fixing bolt's upper end passes channel-section steel girder's lower pterygoid lamina 21, 35 and realizes through the nut that channel-section steel girder is fixed on the test bench, when experimental, simply supported beam is put on supporting seat 46 and simply supported beam's middle part is located under the hydraulic stem in the fatigue testing machine, the supporting seat is prior art, give unnecessary details here. The simply supported beam bending test device has the advantages that the displacement meter protection support with the structure is arranged, so that the displacement meter is well protected, and property and time loss caused by damage of the displacement meter are saved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A displacement meter protective cradle which is characterized in that: including the support frame and locate the steel sheet on the support frame, the support frame includes along two channel-section steel girder steels of transverse distribution and sets firmly two at least bracing pieces on every channel-section steel girder steel, two the channel-section steel girder steel all extends along longitudinal direction, and the steel sheet sets firmly in the top of bracing piece, and the middle part of steel sheet has the through-hole that supplies the displacement meter to pass.
2. A displacement meter protective bracket according to claim 1, wherein: the bracing piece has four, sets up two on being located four angles of steel sheet and every channel-section steel girder steel respectively the bracing piece, the upper end welded fastening of every bracing piece is on the steel sheet, and the lower extreme welded fastening of every bracing piece is on the last pterygoid lamina that corresponds the channel-section steel girder steel.
3. A displacement meter protective bracket according to claim 1, wherein: the bracing piece has four, is located four angles of steel sheet and sets up two on every channel-section steel girder steel respectively the bracing piece, the both ends of every bracing piece all set up the external screw thread, and the upper end of every bracing piece is inserted and is established on the steel sheet and establish soon through the nut of both sides about the steel sheet fixedly, and the lower extreme of every bracing piece is inserted and is established on the last pterygoid lamina of corresponding channel-section steel girder steel and establish soon through the nut of both sides about the last pterygoid lamina fixedly, and the thread length of bracing piece lower extreme is longer than the vertical length of last.
4. A displacement meter protective bracket according to claim 1, 2 or 3, wherein: also comprises a displacement meter fixing mechanism, the displacement meter fixing mechanism comprises two electromagnets, a power supply and a plurality of leads, two electricity connection plates and the mount of connecting two electro-magnets, the electro-magnet has the plastic casing, two electricity of the coil of electro-magnet are connected the contact and are set up on the shell top surface, the electricity connection plate is including fixing the insulation board on iron plate lower surface and locating two on the insulation board be used for with correspond the electric connection contact piece of being connected, the electric magnet is drawn forth through the wire to electricity connection contact piece, a power supply, wire and electricity connection plate form a series circuit, the mount is including fixing the connecting rod on two electro-magnet shells, the free end an organic whole of every connecting rod sets up C shape clamp, the free end of C shape clamp all has the edge of turning up, two C shape clamps form one be used for holding the staple bolt of displacement meter shell and pass through the staple bolt of.
5. A displacement meter protective bracket according to claim 4, characterized in that: two hanging baskets for bearing the electromagnet are further arranged below the iron plate, an annular connecting surface is arranged at the top of each hanging basket and is fixed on the bottom surface of the iron plate through the connecting surface, and the insulating plate is arranged in the corresponding annular connecting surface.
6. Simple beam flexural test device, its characterized in that: the displacement meter protection support comprises a test bed, a fatigue testing machine arranged on the test bed and the displacement meter protection support as claimed in any one of claims 1 to 5 arranged below the fatigue testing machine, wherein two grooves with the cross sections extending along the longitudinal direction are transversely distributed on the test bed and in a shape like a Chinese character 'tu', fixing bolts are arranged in the grooves, the width of the groove openings of the grooves is smaller than that of the end parts of the lower ends of the bolts, and the upper ends of the fixing bolts penetrate through lower wing plates of channel steel beams and are fixed on the test bed through nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922210643.XU CN211317974U (en) | 2019-12-11 | 2019-12-11 | Displacement meter protective bracket and simply supported beam bending test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922210643.XU CN211317974U (en) | 2019-12-11 | 2019-12-11 | Displacement meter protective bracket and simply supported beam bending test device |
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| Publication Number | Publication Date |
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| CN211317974U true CN211317974U (en) | 2020-08-21 |
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| CN201922210643.XU Active CN211317974U (en) | 2019-12-11 | 2019-12-11 | Displacement meter protective bracket and simply supported beam bending test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849710A (en) * | 2019-12-11 | 2020-02-28 | 河南工程学院 | Displacement meter protective bracket and simply supported beam bending test device |
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2019
- 2019-12-11 CN CN201922210643.XU patent/CN211317974U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849710A (en) * | 2019-12-11 | 2020-02-28 | 河南工程学院 | Displacement meter protective bracket and simply supported beam bending test device |
| CN110849710B (en) * | 2019-12-11 | 2022-09-13 | 河南工程学院 | Displacement meter protective bracket and simply supported beam bending test device |
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