CN209854517U - Quick drop hammer type deflectometer - Google Patents
Quick drop hammer type deflectometer Download PDFInfo
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- CN209854517U CN209854517U CN201920613121.1U CN201920613121U CN209854517U CN 209854517 U CN209854517 U CN 209854517U CN 201920613121 U CN201920613121 U CN 201920613121U CN 209854517 U CN209854517 U CN 209854517U
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Abstract
The utility model discloses a quick drop hammer type deflectometer, which comprises a bearing plate and a supporting hydraulic cylinder capable of driving the bearing plate to reciprocate along the vertical direction, wherein the middle part of the bearing plate is provided with a main hydraulic cylinder rod along the vertical direction, the main hydraulic cylinder is provided with a heavy hammer capable of reciprocating along the vertical direction, the main hydraulic cylinder rod is also sleeved with a locking device linked with the heavy hammer, and the bearing plate is provided with a main hydraulic cylinder capable of driving the heavy hammer to move along the vertical direction; the device comprises a bearing plate, a data processing module and a computer matched with the data processing module, wherein the bearing plate is provided with a main displacement sensor matched with the bearing plate and the data processing module respectively, and a plurality of auxiliary displacement sensors matched with a surrounding roadbed and the data processing module are arranged below the bearing plate; and a hydraulic pump station which is respectively matched with the main hydraulic cylinder, the supporting hydraulic cylinder and the data processing module is arranged outside the bearing plate. The drop hammer type deflectometer is simple, convenient and quick to operate and accurate and efficient to detect.
Description
Technical Field
The utility model relates to a roadbed pavement structural design, evaluation acceptance, maintenance management corollary equipment technical field.
Background
The deflection value is the vertical deformation of a road bed or a road surface under a specified load, and 1/100 mm is used as a calculation unit. It is an important index for directly reflecting the strength of roadbed and road surface, and is an important evaluation index for evaluating the comprehensive bearing capacity of newly built (modified) road and checking and accepting engineering completion.
The drop hammer type deflectometer is a main device for evaluating the strength of a roadbed and a pavement, and comprises a load generating device, a deflection detecting device, an operation control system and the like, wherein the load generating device usually comprises a heavy hammer, a rubber buffer device, a load bearing plate, a lifting hydraulic cylinder and the like, and the deflection detecting device usually comprises a deflection sensor, a pressure sensor, a circuit, a signal processing unit and the like. The drop hammer type deflectometer can quickly, accurately and real-timely detect the deflection value of each grade of highway pavement and can provide comprehensive and efficient data support for acceptance of completion, preventive maintenance and pavement management systems.
The working principle of the drop hammer type deflectometer is as follows: under the control of a computer system, a heavy hammer with certain mass is locked by a mechanical buckle or a strong magnet and lifted to a set height and then released, the heavy hammer falls freely, impact force acts on a rubber buffer on a bearing plate and is transmitted to the road surface, so that pulse load is applied to the road surface, instantaneous deformation is generated on the surface of the road surface, the deformation of the surface of a structure layer is detected by sensors distributed at different distances from a measuring point, a signal is transmitted to a computer by an acquisition system for signal processing and operation, and finally the dynamic deflection and deflection basin shape generated under the action of dynamic load are determined. The test data can be used for back-calculating the modulus of the pavement structure layer, so that the bearing capacity of the pavement can be scientifically evaluated.
However, although the drop weight deflectometer can meet the general construction acceptance requirements, in the working process, the heavy hammer usually rebounds for more than 3 times after being released at the set height, after the heavy hammer is stabilized, the mechanical fastener or the powerful magnet descends, then the heavy hammer is locked and is lifted to the set height to be effectively hammered for the second time, the process that the heavy hammer rebounds to be static needs to be waited for each hammering, the process belongs to invalid working time, the single-point detection period is prolonged, the detection efficiency of the device is reduced, the overall acceptance test time of the project is correspondingly prolonged, and the detection efficiency is restricted.
Therefore, how to provide a drop weight deflectometer which is simple, convenient and quick to operate and accurate and efficient to detect is an important technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a quick drop hammer deflectometer, this quick drop hammer deflectometer easy and simple to handle is quick and detect accurate high-efficient.
In order to solve the technical problem, the utility model provides a quick drop hammer type deflectometer, which comprises a bearing plate and a supporting hydraulic cylinder capable of driving the bearing plate to reciprocate along the vertical direction, wherein the middle part of the bearing plate is provided with a main hydraulic cylinder rod along the vertical direction, the main hydraulic cylinder is provided with a heavy hammer capable of reciprocating along the vertical direction, the main hydraulic cylinder rod is also sleeved with a locking device linked with the heavy hammer, and the bearing plate is provided with a main hydraulic cylinder capable of driving the heavy hammer to move along the vertical direction;
the bearing plate is provided with a main displacement sensor which is respectively matched with the bearing plate and the data processing module, and a plurality of auxiliary displacement sensors which are matched with a surrounding roadbed and the data processing module are also arranged below the bearing plate;
and a hydraulic pump station which is matched with the main hydraulic cylinder, the supporting hydraulic cylinder and the data processing module respectively is arranged outside the bearing plate.
Preferably, a pressure sensor matched with the data processing module is arranged below the bearing plate.
Preferably, a buffer device is arranged below the heavy hammer.
Preferably, the buffer device is fixed on the bearing plate and is positioned on the same installation reference plane with the main hydraulic cylinder.
Preferably, the locking device comprises a wedge-shaped hoop and a wedge-shaped fixture block which are matched with the main hydraulic cylinder rod, a compression spring matched with the wedge-shaped hoop and the wedge-shaped fixture block, a locking pin matched with the compression spring and a position sensor.
Preferably, the four corners of the bearing plate are respectively fixed with an auxiliary guide post along the vertical direction.
Preferably, the heavy hammer is provided with a support cylinder which is matched and linked with the extending end of the support hydraulic cylinder in a sleeved mode.
Preferably, the locking device is fixed coaxially with the weight, and the locking device is located above the weight in the vertical direction.
Preferably, a cross beam is arranged below the bearing plate, and the auxiliary displacement sensors are uniformly distributed on the cross beam along the horizontal direction.
Compared with the prior art, the utility model provides a quick drop hammer type deflectometer, in its working process, earlier by support hydraulic cylinder with loading board and relevant part along vertical direction integral movement to the station operation face department of ground road bed department, rethread main hydraulic cylinder drives the weight and rises to setting for the height along the guide pillar, later release weight makes its along vertical direction free fall to the bottom and kick-backs, data processing module cooperates with the computer with the initial release height through the weight calculate the first kick-back height of this weight, and when the weight kick-backs to this first kick-back height, lock locking device on main hydraulic cylinder pole, so that weight and main hydraulic cylinder are relatively static, thereby avoid the weight to continue to fall; and then the main hydraulic cylinder lifts the heavy hammer to a set height position again to release the heavy hammer, the subsequent steps are repeated, the vertical deformation of the roadbed operation surface and the positions of the roadbed around the roadbed operation surface can be measured through the main displacement sensor and the auxiliary displacement sensor in such a reciprocating way, whether the current engineering construction meets the corresponding bearing capacity requirement or acceptance index is judged according to the vertical deformation, and after the operation is finished, the supporting hydraulic cylinder lifts the bearing plate and the related parts to be separated from the ground in the vertical direction and restores the bearing plate and the related parts to the initial position. The single-point detection of the rapid drop weight deflectometer only needs to be rebounded once, so that the invalid working time in the detection process is greatly reduced, the single-point detection period is shortened, the operation process is simple, convenient and rapid, the detection result is accurate and reliable, the deflectometer detection efficiency of corresponding engineering can be obviously improved, and the detection time is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of an overall structure of a drop hammer deflectometer according to an embodiment of the present invention;
FIG. 2 is a perspective view of the weight of FIG. 1 being lifted to a predetermined height;
FIG. 3 is a perspective view of the weight of FIG. 1 after rebounding to the initial rebound height.
The device comprises a bearing plate 11, a support cylinder 111, a weight 12, a locking device 13, a main hydraulic cylinder 14, a main hydraulic cylinder rod 141, a hydraulic pump station 142, a pressure sensor 143, a buffer device 15, a support hydraulic cylinder 16, a cross beam 17, a data processing module 21, a main displacement sensor 211, an auxiliary displacement sensor 212 and a computer 22.
Detailed Description
The core of the utility model is to provide a quick drop hammer deflectometer, this drop hammer deflectometer easy and simple to handle quick and detect accurate high-efficient.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 3, fig. 1 is a schematic view of an overall structure of a drop hammer deflectometer according to an embodiment of the present invention; FIG. 2 is a perspective view of the weight of FIG. 1 being lifted to a predetermined height; FIG. 3 is a perspective view of the weight of FIG. 1 after rebounding to the initial rebound height.
In a specific embodiment, the drop hammer type deflectometer provided by the utility model comprises a bearing plate 11, wherein a main hydraulic cylinder 14 is arranged in the middle of the bearing plate 11 along the vertical direction, a heavy hammer 12 is sleeved on a main hydraulic cylinder rod 141 along the vertical direction in a reciprocating manner, a locking device 13 linked with the heavy hammer 12 is further sleeved on the main hydraulic cylinder rod 141, and two sides of the heavy hammer 12 are respectively provided with a supporting hydraulic cylinder 16 linked with the bearing plate 11 and capable of reciprocating along the vertical direction; the device also comprises a data processing module 21 and a computer 22 matched with the data processing module 21, wherein the bottom of the bearing plate 11 is provided with a main displacement sensor 211 connected with the data processing module 21, and a plurality of auxiliary displacement sensors 212 connected with the surrounding roadbed and the data processing module 21 are also arranged below the bearing plate 11; the exterior of the carrier plate 11 is provided with hydraulic pump stations 142 which cooperate with the master cylinder 14, the support cylinder 16 and the data processing module 21, respectively.
During the operation, the support hydraulic cylinder 16 integrally moves the bearing plate 11 and the related components to the working position working surface of the ground subgrade along the vertical direction, the main hydraulic cylinder 14 drives the weight 12 to rise to a set height along the main hydraulic cylinder rod 141, then the weight 12 is released to freely fall to the bottom along the vertical direction and rebound, meanwhile, the data processing module 21 cooperates with the computer 22 to calculate the initial rebound height of the weight 12 according to the initial release height of the weight 12, and the locking device 13 is locked on the main hydraulic cylinder rod 141 when the weight 12 rebounds to the initial rebound height, so that the weight 12 and the main hydraulic cylinder rod 141 are relatively static, and the weight 12 is prevented from further falling; then, the main hydraulic cylinder 14 transports the weight 12 to the set height again to release, and repeats the above subsequent steps, so as to measure the vertical deformation of the bearing plate 11 and the positions of the roadbed around the bearing plate through the main displacement sensors 211 and the auxiliary displacement sensors 212, so as to determine whether the current engineering construction meets the corresponding bearing capacity requirement or acceptance criterion, and after the operation is completed, the supporting hydraulic cylinder 16 lifts the bearing plate 11 and the related parts along the vertical direction to be separated from the ground and restore to the initial position. The single-point detection of the drop hammer type deflectometer only needs to be rebounded once, so that the invalid working time in the construction process is greatly reduced, the single-point detection period is shortened, the operation process is simple, convenient and quick, the detection result is accurate and reliable, the deflectometer detection efficiency of corresponding engineering can be obviously improved, and the detection acceptance time of the deflectometer is shortened.
It should be noted that, the position of the roadbed around the bearing plate 11 can refer to the dotted line part in the bottom of fig. 1, and the roadbed positions mentioned in the rest of the text are the same as that, and are not described again.
It should be noted that, in practical applications, the structure of the master cylinder 14 and the master cylinder rod 141 is not limited to the above-mentioned hydraulic cylinder assembly, and may also be a nut and lead screw matching mechanism or a worm and gear mechanism, which can stably and reliably drive the weight 12 to perform vertical movement, in principle, as long as it can meet the practical application requirements of the fast drop weight deflectometer.
Furthermore, the bottom of the carrier plate is provided with a pressure sensor 143 cooperating with the data processing module 21. The pressure sensor 143 can measure the working pressure at the bottom of the bearing plate 11 in real time, and feed back the related pressure data to the data processing module 21, so that the data processing module 21 and the computer 22 are matched with each other to calculate the reasonable working parameters of the device and the stress condition of the surrounding working condition environment.
Specifically, a buffer device 15 is disposed below the weight 12. This buffer 15 can provide reliable structure buffering for weight 12 when weight 12 falls to touch down, avoids weight 12 and bearing board 11 rigid contact and produces the damage to relevant subassembly structure, guarantees quick falling weight deflectometer's bulk strength and working property.
More specifically, the damping device 15 is fixed to the carrier plate 11 and is located at the same mounting reference plane as the master cylinder 14. The buffer effect of the buffer device 15 can be fully ensured on the same mounting reference surface, and the stress distribution among the components on the bearing plate 11 is optimized.
Furthermore, the damping means 15 is a rubber damper located on the carrier plate 11. The rubber buffer has good buffering effect and low cost, and can properly reduce the overall manufacturing cost of equipment while ensuring the performance of the equipment. Of course, it is only preferable that the buffering device 15 is a rubber buffer, and other components capable of providing reliable buffering for the weight 12, such as a plastic cushion or a damping spring, may be selected in practical applications, as long as the requirements of the rapid drop weight deflectometer in practical use can be satisfied.
On the other hand, the locking device 13 includes a wedge-shaped clamp and a wedge-shaped fixture block which are sleeved on the outer peripheral surface of the main hydraulic cylinder rod 141 and coaxially clamped and adapted, a compression spring adapted to the wedge-shaped clamp and the wedge-shaped fixture block, and a lock pin and a position sensor which are matched with the compression spring. In the actual work process, through counterpoint joint adaptation between wedge clamp and the wedge fixture block, realize locking device 13 to the locking of the embracing formula of main hydraulic cylinder pole 141, when needs are relieved the locking, hydraulic power unit injects high-pressure oil into locking device 13, compression spring is compressed, wedge clamp and wedge fixture block are separated, thereby relieve the locking cooperation between locking device 13 and main hydraulic cylinder pole 141, so that locking device can together freely remove with weight 12, when needing the locking, to locking device 13 off-load, compression spring resumes, wedge clamp and wedge fixture block locking.
In addition, sub-guide posts (not shown) extending in the vertical direction are respectively penetrated through four corners of the bearing plate 11. Each auxiliary guide post can provide reliable lifting auxiliary guide for the bearing plate 11, so as to further avoid dislocation or loosening of the bearing plate 11 in the lifting movement process driven by the supporting hydraulic cylinder 16 and ensure the working reliability of the rapid drop hammer type deflectometer.
Furthermore, a supporting cylinder 111 is arranged on the bearing plate 11 and is matched and linked with the extending end of the supporting hydraulic cylinder 16 in a sleeved mode. Each supporting cylinder 111 can be reliably adapted to the supporting hydraulic cylinder 16, stress distribution between the bearing plate 11 and the supporting hydraulic cylinder 16 is optimized, and structural reliability and operation stability of the bearing plate 11 in the lifting process are guaranteed.
Furthermore, locking device 13 is fixed coaxially with weight 12, and locking device 13 is located above weight 12 in the vertical direction. The coaxial alignment structure is beneficial to further improving the matching precision between the locking device 13 and the heavy hammer 12, and ensuring the operation reliability and the detection precision of the drop hammer type deflectometer.
More specifically, a cross beam 17 is disposed below the carrier plate 11, and the auxiliary displacement sensors 212 are distributed on the cross beam 17 in a horizontal direction. The cross beam 17 can provide reliable structural support for each auxiliary displacement sensor 212, and ensure stable and reliable operation of each auxiliary displacement sensor 212.
In summary, the utility model provides a quick drop hammer type deflectometer, in its working process, earlier by support hydraulic cylinder with loading board and relevant part along vertical direction integral movement to the station working face department of ground road bed department, rethread main hydraulic cylinder drives the weight and rises to setting for the height along main hydraulic cylinder pole, later release the weight so that it freely falls to the bottom and kick-backs along vertical direction, data processing module cooperates with the computer simultaneously with the initial release height through the weight calculate the first time resilience height of this weight, and when the weight kick-backs to this first time resilience height, lock locking device on main hydraulic cylinder pole, so that weight and main hydraulic cylinder pole are relatively static, thereby avoid the weight to continue to fall; and then the main hydraulic cylinder conveys the heavy hammer to a set height position again for releasing, the subsequent steps are repeated, the vertical deformation of the bearing plate and the positions of the roadbed around the bearing plate can be measured through the main displacement sensors and the auxiliary displacement sensors in a reciprocating mode, whether the current engineering construction meets the corresponding bearing capacity requirement or acceptance index is judged according to the vertical deformation, and the bearing plate and the related parts are lifted to be separated from the ground along the vertical direction and recovered to the initial position by the supporting hydraulic cylinder after the operation is finished. The single-point detection of the rapid drop weight deflectometer only needs to be rebounded once, so that the invalid working time in the construction process is greatly reduced, the single-point detection period is shortened, the operation process is simple, convenient and rapid, the detection result is accurate and reliable, the deflectometer detection efficiency of corresponding engineering can be obviously improved, and the detection acceptance time is shortened.
It is right above that the utility model provides a quick drop hammer type deflectometer has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (9)
1. The utility model provides a quick drop hammer deflectometer which characterized in that: the hydraulic loading device comprises a loading plate and a supporting hydraulic cylinder capable of driving the loading plate to reciprocate in the vertical direction, wherein a main hydraulic cylinder rod is arranged in the middle of the loading plate in the vertical direction, a heavy hammer capable of reciprocating in the vertical direction is arranged on the main hydraulic cylinder, a locking device linked with the heavy hammer is further sleeved on the main hydraulic cylinder rod, and a main hydraulic cylinder capable of driving the heavy hammer to move in the vertical direction is arranged on the loading plate;
the bearing plate is provided with a main displacement sensor which is respectively matched with the bearing plate and the data processing module, and a plurality of auxiliary displacement sensors which are matched with a surrounding roadbed and the data processing module are also arranged below the bearing plate;
and a hydraulic pump station which is matched with the main hydraulic cylinder, the supporting hydraulic cylinder and the data processing module respectively is arranged outside the bearing plate.
2. The drop weight deflectometer of claim 1, wherein: and a pressure sensor matched with the data processing module is arranged below the bearing plate.
3. The drop weight deflectometer of claim 1, wherein: and a buffer device is arranged below the heavy hammer.
4. A drop weight deflectometer according to claim 3, wherein: the buffer device is fixed on the bearing plate and is positioned on the same installation reference surface with the main hydraulic cylinder.
5. The drop weight deflectometer of claim 1, wherein: the locking device comprises a wedge-shaped hoop and a wedge-shaped fixture block which are matched with the main hydraulic cylinder rod, a compression spring matched with the wedge-shaped hoop and the wedge-shaped fixture block, a lock pin matched with the compression spring and a position sensor.
6. The drop weight deflectometer of claim 1, wherein: and auxiliary guide pillars in the vertical direction are respectively fixed at the four corners of the bearing plate.
7. The drop weight deflectometer of claim 1, wherein: and the heavy hammer is provided with a support cylinder which is matched and linked with the extending end of the support hydraulic cylinder in a sleeved mode.
8. The drop weight deflectometer of claim 1, wherein: the locking device is coaxially fixed with the heavy hammer, and the locking device is located above the heavy hammer along the vertical direction.
9. The drop weight deflectometer of claim 1, wherein: and a cross beam is arranged below the bearing plate, and the auxiliary displacement sensors are uniformly distributed on the cross beam along the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920613121.1U CN209854517U (en) | 2019-04-29 | 2019-04-29 | Quick drop hammer type deflectometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920613121.1U CN209854517U (en) | 2019-04-29 | 2019-04-29 | Quick drop hammer type deflectometer |
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| CN209854517U true CN209854517U (en) | 2019-12-27 |
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| CN201920613121.1U Active CN209854517U (en) | 2019-04-29 | 2019-04-29 | Quick drop hammer type deflectometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858047A (en) * | 2021-02-10 | 2021-05-28 | 郑州东辰科技有限公司 | Drop hammer type deflection measuring device |
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2019
- 2019-04-29 CN CN201920613121.1U patent/CN209854517U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858047A (en) * | 2021-02-10 | 2021-05-28 | 郑州东辰科技有限公司 | Drop hammer type deflection measuring device |
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