CN216560127U - Calibrating device for concrete resiliometer - Google Patents
Calibrating device for concrete resiliometer Download PDFInfo
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- CN216560127U CN216560127U CN202122161255.4U CN202122161255U CN216560127U CN 216560127 U CN216560127 U CN 216560127U CN 202122161255 U CN202122161255 U CN 202122161255U CN 216560127 U CN216560127 U CN 216560127U
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Abstract
The utility model relates to a calibration device for a concrete rebound instrument, which comprises a device support, wherein a spring seat is arranged on the device support, a force measuring spring is assembled in the spring seat in a guiding and moving manner, one end of the force measuring spring is a force transmission end which is in force transmission fit with the rebound instrument, the other end of the force measuring spring is provided with a spring compression amount adjusting structure which is used for adjusting the compression amount of the force measuring spring, and the calibration device also comprises a length measuring structure which is used for measuring the compression length of the force measuring spring in the calibration process. The utility model provides a calibration device for a concrete rebound apparatus, which can realize the calibration of the rebound apparatus without disassembling the rebound apparatus.
Description
Technical Field
The utility model relates to a calibration device for a concrete rebound instrument in the field of calibration and verification.
Background
A spring-driven impact hammer of a concrete resiliometer type is characterized in that an impact rod is used for impacting the surface of concrete, the surface of the concrete generates homeotropic elastic deformation to absorb energy, and the impact hammer rebounds to represent the hardness of the concrete according to energy loss. The principle is utilized that the harder the concrete is, the less energy the concrete absorbs due to elastic deformation, and the less energy the impact hammer loses during impact.
The working process of the concrete resiliometer is shown in fig. 1, in order to clearly show the problem, the 1 st state, the 2 nd state, the 3 rd state, the 4 th state and the 5 th state occur in time sequence, when in work, the height of the elastic hammer 16 is firstly lifted, as shown in the 1 st state, the elastic hammer spring 15 stores energy, and one end of the elastic rod 2, which is far away from the elastic hammer, is in contact with the surface of the concrete. Then the striking hammer 16 is released and moves towards the striking rod under the guiding action of the guide rod 19, as shown in state 2; then, the lower end face 18 of the impact hammer impacts the impact rod 2, and the impact rod impacts the concrete, as shown in state 3; then, as in state 4, the hammer starts to rebound away from the striking rod; finally, as shown in state 5, the hammer reaches the rebound highest position.
In the prior art, the energy loss of the impact hammer is characterized by measuring the height difference of the impact hammer in the 1 st state and the 5 th state, a rebound instrument can record the position difference of the impact hammer before and after impact, the rebound value is calculated through the change of energy in the two states, and the difference between the sum of the gravitational potential energy of the impact hammer in the 1 st state and the elastic potential energy of a spring in the 1 st state and the sum of the gravitational potential energy of the impact hammer in the 5 th state and the elastic potential energy of the spring in the 5 th state is the change of energy in the two states. It can be seen from this, whether the resiliometer is accurate, mainly depend on the spring of resiliometer the inside, according to corresponding calibration verification requirement, the resiliometer needs regular calibration, the calibration of resiliometer is exactly the calibration to its inner spring in essence, among the prior art, the calibration mode to the resiliometer is with resiliometer dismantlement completely, then take out the percussion hammer spring of resiliometer the inside, apply standard weight on percussion hammer spring, according to percussion hammer spring's tensile length, judge whether percussion hammer spring's coefficient of elasticity can satisfy the use precision. This calibration method has the following problems: 1) the rebound tester is disassembled, so that the workload is large, and the calibration difficulty is increased; 2) after the elastic hammer spring is taken out of the resiliometer, the elastic hammer spring is separated from the real working environment, and even if the calibration of the spring is completed, the accuracy of the elastic hammer spring is unknown after the elastic hammer spring is installed in the resiliometer.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a calibration device for a concrete rebound apparatus, which can realize the calibration of the rebound apparatus without disassembling the rebound apparatus.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a calibration device for concrete resiliometer, includes the device support, is provided with the spring holder on the device support, and the direction removes in the spring holder and is equipped with the dynamometry spring, and the one end of dynamometry spring is for being used for with the rebound appearance biography power complex end of passing, and the other one end of dynamometry spring is provided with the spring compression volume that is used for adjusting the dynamometry spring compression volume and adjusts the structure, and calibration device still includes the length measurement structure that is used for measuring dynamometry spring compression length at the calibration in-process.
The force measuring spring is horizontally arranged.
The device support is provided with a rebound apparatus placing table for horizontally placing the rebound apparatus on one side of the spring seat.
The calibration device further comprises an impact ball for transferring force between the resiliometer and the force transfer end.
The device is provided with the counter-force on the support and supports, and counter-force support and spring holder are located the axial both sides of resiliometer, are provided with force cell sensor between counter-force support and the resiliometer, and the resiliometer is placed and is provided with the support rolling element that is used for reducing resiliometer and places frictional force between the platform.
The spring holder includes footstock and base, follows spring axial direction removal on the footstock and is equipped with spring ejector pin, spring ejector pin pass through spring head end clamp plate with the stress end links to each other, spring compression volume adjust the structure set up in on the base.
The spring compression amount adjusting structure comprises a spring tail end pressing plate and an adjusting screw rod in threaded connection with the base, and the adjusting screw rod is in running fit with the spring tail end pressing plate.
The length measuring structure comprises a laser displacement sensor arranged on the spring tail end pressing plate, the axis of the laser displacement sensor is consistent with that of the force measuring spring, and the spring head end pressing plate is provided with a measuring part correspondingly arranged with the laser displacement sensor.
The utility model has the beneficial effects that: when the resiliometer is calibrated, the outward impact force of the resiliometer is transmitted to the force measuring spring through the force transmission end, the elastic potential energy stored by the force measuring spring after being pressed is the energy lost by the resiliometer during impact, and the energy corresponds to the elastic potential energy before and after the impact of the elastic hammer spring in the resiliometer, so that the resiliometer can be calibrated without disassembling the resiliometer, and the calibration process is simple and convenient; and the resiliometer calibrates the resiliometer in its service behavior, guarantees that the actual behavior of calibration result and resiliometer is unanimous. The spring compression amount adjusting structure adjusts the compression amount of the force measuring spring before the rebound meter impacts, and the force measuring spring generates different rigidity so as to simulate concrete with different hardness.
Drawings
FIG. 1 is a schematic structural diagram of the background art of the present invention;
FIG. 2 is a schematic structural view of embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of embodiment 2 of the present invention;
in the figure: 1. a device holder; 2. a tapping rod; 3. striking a ball; 4. a top seat; 5. a rebound tester; 6. a spring ejector rod; 7. a measuring section; 8. a spring head end pressing plate; 9. a force measuring spring; 10. a spring tail end pressing plate; 11. a laser displacement sensor; 12. adjusting the screw rod; 13. a base; 14. supporting in a counter-force manner; 15. a spring for the percussion hammer; 16. a percussion hammer; 18. the lower end surface of the elastic hammer; 19. guide rod, 20, force transducer; 21. a resiliometer placing table; 22. supporting the rolling bodies.
Detailed Description
In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is to be noted that, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 2 shows an example 1 of the calibration device for a concrete rebound apparatus according to the present invention: the device comprises a device support 1, the device support in the embodiment is of a plate-shaped structure, a spring seat is fixed on the device support, a force measuring spring 9 is assembled in the spring seat in a guiding and moving mode in the left-right direction, the spring seat comprises a top seat 4 and a base 13, the base 13 and the top seat 4 are arranged at left and right intervals, the right end of the force measuring spring 9 is a force transmission end used for being in force transmission fit with a resiliometer, and a spring compression amount adjusting structure used for adjusting the compression amount of the force measuring spring is arranged at the left end of the force measuring spring.
The spring compression amount adjusting structure comprises a spring tail end pressing plate 10 and an adjusting screw rod 12 in threaded connection with the base, and the adjusting screw rod 12 is in running fit with the spring tail end pressing plate 10. The adjusting screw 12 is rotated to drive the spring tail end pressing plate 10 to move left and right, so that the initial compression amount of the force measuring spring 9 is adjusted.
The footstock is provided with a spring ejector rod 6 along the axial direction guide movement of the spring, and the spring ejector rod 6 is connected with the stress end through a spring head end pressing plate 8. The calibration device further comprises a length measurement structure for measuring the compression length of the force measuring spring in the calibration process, the length measurement structure comprises a laser displacement sensor 11 arranged on the spring tail end pressing plate 10, the axis of the laser displacement sensor is consistent with that of the force measuring spring, and the spring head end pressing plate 8 is provided with a measurement part 7 correspondingly arranged with the laser displacement sensor. The laser displacement sensor emits laser towards the right measuring part, and the change of the compression amount of the force measuring spring is obtained through the reflection of the measuring part.
The device support is provided with a counter-force support 14, the counter-force support 14 and a spring seat are located on two axial sides of the resiliometer, a force measuring sensor 20 is arranged between the counter-force support 14 and the resiliometer 5, and a support rolling body 22 used for reducing friction force between the resiliometer and the resiliometer placing table is arranged on the resiliometer placing table 21. The calibration device further comprises a strike ball 3 for transferring force between the resiliometer and the force transfer end.
The force measuring spring is pressed through the spring compression amount adjusting structure, so that the initial prestress of the force measuring spring is adjusted, the acting force can be visually displayed through the force measuring sensor, the rigidity of the force measuring spring is further judged, when the resiliometer is calibrated, the initial acting force of the impact ball on the impact rod is changed through a multi-point calibration mode, and therefore concrete with different rigidity and different hardness is simulated. For example, the position where the elastic potential energy of the force measuring spring is zero is adjusted, at this time, the impact ball is in contact with the bouncing rod, and the reading of the force measuring sensor is zero, which indicates that the force measuring spring is not compressed. The trigger of the resiliometer is manually or mechanically pulled, a rebound hammer spring channel in the resiliometer is used for impacting a rebound rod, then the rebound rod impacts a force measuring spring through an impact ball, the force measuring spring is compressed and stored with energy, a length measuring structure is used for measuring the compression amount of the compressed and stored energy of the force measuring spring, the stored energy of the force measuring spring is calculated according to the compression amount, the stored energy corresponds to the energy loss of the resiliometer in the collision process, the elastic potential energy difference value before and after the resiliometer is impacted is calculated according to the position of the rebound hammer in the resiliometer, and the elastic potential energy difference value before and after the resiliometer is impacted is compared with the stored energy of the force measuring spring, so that whether the resiliometer meets the requirement or not can be calibrated.
In the whole calibration process, the impact ball, the resiliometer and the force measuring spring are horizontally arranged, the gravitational potential energy of each part is not changed, and the influence of the gravitational potential energy of each part on the calibration process is avoided. The spring compression amount adjusting structure can compress the force measuring spring before calibration, and changes the initial contact force between the impact ball and the bounce, so that concrete with different hardness and different rigidity can be simulated, and the calibration process of the resiliometer under different rigidity states can be realized.
In other embodiments of the utility model: the compression amount adjusting structure can also be in an electric mode, and the initial compression amount of the force measuring spring is adjusted by driving the pressing plate through the motor; the impact hammer can be omitted, and the elastic rod of the resiliometer can directly transmit force to the force measuring spring at the moment; the length measuring structure can be in a mode other than a laser displacement sensor mode, for example, scales are arranged on the spring seat, an indicating needle matched with the scales is fixed on the force measuring spring, and the compression amount of the force measuring spring is judged by indicating the scales.
Example 2 of the calibration device for a concrete rebound apparatus is shown in fig. 3: embodiment 2 is different from embodiment 1 in that a reaction force support, a load cell, and a rebound apparatus placing table are not provided in this embodiment, and when calibrating the rebound apparatus 5, an operator needs to hold the rebound apparatus 5 with his hand to calibrate the rebound apparatus.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a calibrating device for concrete resiliometer, includes the device support, its characterized in that: the device comprises a device support and a force measuring spring, wherein the device support is provided with a spring seat, the force measuring spring is assembled in the spring seat in a guiding and moving manner, one end of the force measuring spring is a force transmission end which is in force transmission fit with a resiliometer, the other end of the force measuring spring is provided with a spring compression amount adjusting structure which is used for adjusting the compression amount of the force measuring spring, and the calibrating device further comprises a length measuring structure which is used for measuring the compression length of the force measuring spring in the calibrating process.
2. The calibration device of claim 1, wherein: the force measuring spring is horizontally arranged.
3. The calibration device of claim 2, wherein: the device support is provided with a rebound apparatus placing table for horizontally placing the rebound apparatus on one side of the spring seat.
4. The calibration device of claim 3, wherein: the device is provided with the counter-force on the support and supports, and counter-force support and spring holder are located the axial both sides of resiliometer, are provided with force cell sensor between counter-force support and the resiliometer, and the resiliometer is placed and is provided with the support rolling element that is used for reducing resiliometer and places frictional force between the platform.
5. The calibration device according to any one of claims 1 to 4, wherein: the spring holder includes footstock and base, follows spring axial direction removal on the footstock and is equipped with spring ejector pin, spring ejector pin pass through spring head end clamp plate with the stress end links to each other, spring compression volume adjust the structure set up in on the base.
6. The calibration device of claim 5, wherein: the spring compression amount adjusting structure comprises a spring tail end pressing plate and an adjusting screw rod in threaded connection with the base, and the adjusting screw rod is in running fit with the spring tail end pressing plate.
7. The calibration spring as set forth in claim 6 wherein: the length measuring structure comprises a laser displacement sensor arranged on the spring tail end pressing plate, the axis of the laser displacement sensor is consistent with that of the force measuring spring, and the spring head end pressing plate is provided with a measuring part correspondingly arranged with the laser displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122161255.4U CN216560127U (en) | 2021-09-08 | 2021-09-08 | Calibrating device for concrete resiliometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122161255.4U CN216560127U (en) | 2021-09-08 | 2021-09-08 | Calibrating device for concrete resiliometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216560127U true CN216560127U (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122161255.4U Active CN216560127U (en) | 2021-09-08 | 2021-09-08 | Calibrating device for concrete resiliometer |
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| CN (1) | CN216560127U (en) |
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2021
- 2021-09-08 CN CN202122161255.4U patent/CN216560127U/en active Active
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