CN115876616A - Test device for testing mechanical behavior of road after repair through friction force and positive pressure - Google Patents
Test device for testing mechanical behavior of road after repair through friction force and positive pressure Download PDFInfo
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- CN115876616A CN115876616A CN202310196609.XA CN202310196609A CN115876616A CN 115876616 A CN115876616 A CN 115876616A CN 202310196609 A CN202310196609 A CN 202310196609A CN 115876616 A CN115876616 A CN 115876616A
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Abstract
The invention belongs to the technical field of test devices for testing road repairing performance, and particularly relates to a test device for testing mechanical behavior of a road after road repairing through friction and positive pressure. The invention combines the friction force and the positive pressure to test the mechanical behavior of the repaired road, other test devices only singly consider the friction force or the positive pressure factor and do not combine the friction force or the positive pressure factor to study, and the obtained test result has obvious difference from the actual test result. The method can provide help for research in the technical field of road repair and provide help for the exploration of urban road safety performance, and has practical significance.
Description
Technical Field
The invention belongs to the technical field of test devices for testing road repairing performance, and particularly relates to a test device for testing mechanical behavior of a repaired road through friction and positive pressure.
Background
In recent years, with the rapid increase of the number of roads in China, the number of horizontal grades of roads is multiplied compared with the number of the conventional roads, in the face of the maintenance of the huge roads, various novel materials are developed to repair damaged roads, and the adhesion between the original road surface and a repairing material and the pressure resistance of the road surface after repair arouse attention of people. Relevant researches show that the damage of the emergency brake of the automobile to the road is a main factor in the factors of the re-damage of the repaired road surface, so that the huge friction force caused by the emergency brake is generated, and the damage of the positive pressure caused by the weight of the automobile to the road is generated. And prior patent, application No.: CN201811626310.9 a device and a method for testing impact resistance of a road material, which can set various road working conditions such as strong acid, strong alkali, rainfall, high temperature, ultraviolet aging and the like, simulate a complex environment and quickly and accurately test the impact resistance of the road material under different impact parameters.
In addition, the technology for testing the road at the present stage is a ball drop method, namely, a steel ball is freely dropped on a piece to be tested, and the performance of the road is measured by observing the damage degree of the tested piece; the pendulum appearance of test road surface coefficient of friction in addition, through having the rubber material device in pendulum bottom surface design, then lift the pendulum to a take the altitude and transfer, the slider and the road surface contact of rubber material, frictional force is big more, and the height that the pendulum rises once more is lower. The common characteristics of the prior art are that the influence of friction force or instantaneous impact force on a road is singly considered, and the road performance is not tested by combining the friction force and positive pressure of an automobile running on the road surface in actual conditions.
Disclosure of Invention
In order to solve the problems, the invention discloses a test device for testing the mechanical behavior of a road after repair through friction and positive pressure, which can provide help for research in the technical field of road repair and provide help for the exploration of the safety performance of urban roads and has practical significance.
In order to achieve the purpose, the invention adopts the following technical scheme:
test device through mechanical behavior behind frictional force and normal pressure test road repair, which comprises a bracket, install fixed establishment, load mechanism, application of force mechanism, ball mechanism and elevating gear on the support, wherein:
the fixing mechanism is used for fixing a lower material layer of a road after the road is repaired and comprises a test platform and three clamping units, the test platform is installed above the support, a rectangular open die is installed in the middle of the upper portion of the test platform, the lower material layer is filled in the rectangular open die, an upper material layer is laid on the lower material layer, the three clamping units are installed on three sides of the test platform respectively, each clamping unit comprises a positioning steel sheet, a rotating handle and a nut, the positioning steel sheet is welded on the test platform and is close to the rectangular open die, the nut is welded on the test platform and is arranged opposite to the positioning steel sheet, the rotating handle is in threaded connection with the nut, and the end portion of the rotating handle can be abutted against the positioning steel sheet by rotating;
the load mechanism comprises a rigid support, a movable platform and two electric hydraulic jacks, the rigid support is mounted above the test platform, a sliding groove is formed in the rigid support, the movable platform is mounted on the sliding groove, and the two electric hydraulic jacks are welded on the lower end face of the movable platform in an inverted mode;
the force application mechanism is a rectangular steel bar framework, the rectangular steel bar framework is embedded into the upper material layer in a pre-embedding manner, the connecting edge of the rectangular steel bar framework is positioned on the outer side of the upper material layer, and a circular iron ring is welded on the connecting edge; the connecting edge is positioned on one side far away from the clamping unit;
the ball falling mechanism comprises a fixed pulley, a steel cable, a buffering unit and an iron ball, the fixed pulley is arranged on the test platform and is close to one side of the circular iron ring, one end of the steel cable is connected with the circular iron ring, and the other end of the steel cable bypasses the fixed pulley and is sequentially connected with the buffering unit and the iron ball;
the lifting device comprises an electric lifting frame, an electromagnet platform and a laser ranging sensor, wherein the electric lifting frame is installed on the test platform and close to one side of the circular iron ring, and the electromagnet platform is installed on the electric lifting frame.
Preferably, a wheel is mounted at the bottom of each electric hydraulic jack, and the wheel is made of rubber.
Preferably, the buffer unit includes cylindrical shell, upper portion coupling hook, voltage limiting steel sheet, piston rod and lower part coupling hook, cylindrical shell includes threaded connection's epitheca and inferior valve, upper portion coupling hook is fixed in the up end outside of epitheca, upper portion coupling hook connects the cable wire, the upper end of voltage limiting steel sheet with the up end inside connection of epitheca, the piston set up in the inboard of inferior valve, the lower extreme of voltage limiting steel sheet with the up end of piston is connected, the lower terminal of piston with the up end of piston rod is connected, the lower extreme of piston rod passes the lower extreme outside of inferior valve, and with the lower part coupling hook connection, the lower part coupling hook with the iron ball is connected.
Preferably, a buffer layer is filled under the piston inside the lower case.
Preferably, the buffer layer is made of foam ceramic material.
Preferably, the device further comprises an observation mechanism, wherein the observation mechanism comprises a camera head and a high-speed camera, the camera head is installed on one side of the test platform, and the high-speed camera is installed on the camera head.
Preferably, the device further comprises a controller, the controller is respectively connected with the electric hydraulic jack, the electric lifting frame and the laser ranging sensor, the laser ranging sensor measures the height between the electromagnet platform and the ground and inputs the height value to the controller, and the controller adjusts the height of the electromagnet platform according to the height value.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention combines the friction force and the positive pressure to test the mechanical behavior of the repaired road, compared with the prior art, other test devices only consider the friction force or the positive pressure factor singly, and do not combine the friction force and the positive pressure to study, and the obtained test result has obvious difference with the actual result;
2. the invention designs a secondary recovery device, and solves the problem that the iron ball with larger weight is lifted again after the first test is finished, so that the secondary repeated test is carried out;
3. in the invention, a row of wheels made of rubber is designed at the bottom of the electric hydraulic jack in consideration of actual conditions, so that the damage to the jack caused by the relative movement of the two materials is effectively prevented, and in addition, the same positive pressure is provided for the whole test process, so that the test result is more accurate;
4. the laser ranging module is added for controlling the electromagnet lifting platform, the numerical value of the instantaneous tension on the steel cable can be adjusted by adjusting the release height of the iron ball, and the limit of the adhesion of two materials can be tested by adjusting different release heights through multiple tests. A contrast test is added to the test, and the accuracy and the scientificity of the test are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the loading mechanism of the present invention;
FIG. 3 is a schematic structural view of the no-load mechanism of the present invention;
FIG. 4 is a schematic view of the connection between the force applying mechanism and the cable according to the present invention;
FIG. 5 is a schematic view showing the connection between the steel ball and the steel cable according to the present invention;
FIG. 6 is a cross-sectional view of a buffer unit according to the present invention;
FIG. 7 is a view showing the connection between the pressure-limiting steel plate and the buffer unit according to the present invention;
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.
In order to make those skilled in the art better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1-7, the testing apparatus for testing mechanical behavior of road after repair by friction and positive pressure comprises a support, on which a fixing mechanism 1, a loading mechanism 2, a force applying mechanism 3, a ball dropping mechanism 4 and a lifting device 5 are installed, wherein:
the fixing mechanism 1 is used for fixing a lower material layer 6 of a road after the road is repaired and comprises a test platform 11 and three tightening units 12, the test platform 11 is installed above the support, a rectangular opening die is installed in the middle of the upper portion of the test platform 11, the lower material layer 6 is filled in the rectangular opening die, an upper material layer 7 is laid on the lower material layer 6, the three tightening units 12 are installed on three sides of the test platform 11 respectively, the tightening units 12 comprise positioning steel sheets 121, fixed rotating handles 122 and nuts 123, the positioning steel sheets 121 are welded on the test platform 11 and close to the rectangular opening die, the nuts 123 are welded on the test platform 11 and are arranged opposite to the positioning steel sheets 121, the fixed rotating handles 122 are in threaded connection with the nuts 123, and the fixed rotating handles 122 can be abutted against the positioning steel sheets 121 by rotating the end portions of the fixed rotating handles;
the loading mechanism 2 comprises a rigid support 21, a movable platform 22 and two electric hydraulic jacks 23, wherein the rigid support 21 is installed above the test platform 11, a sliding groove is formed in the rigid support 21, the movable platform 22 is installed on the sliding groove, and the two electric hydraulic jacks 23 are welded on the lower end face of the movable platform 22 in an inverted mode;
the force application mechanism 3 is a rectangular steel bar framework, the rectangular steel bar framework is embedded into the upper material layer 7 in a pre-embedding manner, the connecting edge of the rectangular steel bar framework is positioned on the outer side of the upper material layer 7, and a circular iron ring 31 is welded on the connecting edge; the connecting edge is positioned at one side far away from the clamping unit 12;
the ball falling mechanism 4 comprises a fixed pulley 41, a steel cable 42, a buffer unit 43 and an iron ball 44, the fixed pulley 41 is mounted on the test platform 11 and is close to one side of the circular iron ring 31, one end of the steel cable 42 is connected with the circular iron ring 31, and the other end of the steel cable is connected with the buffer unit 43 and the iron ball 44 in sequence by bypassing the fixed pulley 41;
the lifting device 5 comprises an electric lifting frame 51, an electromagnet platform 52 and a laser ranging sensor, wherein the electric lifting frame 51 is arranged on the test platform 11 and is close to one side of the circular iron ring 31, and the electromagnet platform 52 is arranged on the electric lifting frame 51.
And a wheel 24 is arranged at the bottom of each electric hydraulic jack 23, and the wheel 24 is made of rubber.
The buffer unit 43 includes a cylindrical housing 431, an upper connection hook 432, a pressure-limiting steel plate 433, a piston 434, a piston rod 435, and a lower connection hook 436, the cylindrical housing 431 includes an upper housing and a lower housing which are connected by a thread, the upper connection hook 432 is fixed to the outer side of the upper end surface of the upper housing, the upper connection hook 432 is connected to the wire rope 42, the upper end of the pressure-limiting steel plate 433 is connected to the inner side of the upper end surface of the upper housing, the piston 434 is disposed at the inner side of the lower housing, the lower end of the pressure-limiting steel plate 433 is connected to the upper end surface of the piston 434, the lower end surface of the piston 434 is connected to the upper end surface of the piston rod 435, the lower end of the piston rod 435 passes through the outer side of the lower end surface of the lower housing and is connected to the lower connection hook 436, and the lower connection hook 436 is connected to the iron ball 44.
The lower side of the piston 434 inside the lower case is filled with a buffer layer.
The buffer layer is made of foam ceramic materials.
The device also comprises an observation mechanism, wherein the observation mechanism comprises a camera frame and a high-speed camera, the camera frame is arranged on one side of the test platform 11, and the high-speed camera is arranged on the camera frame.
The device also comprises a controller, wherein the controller is respectively connected with the electric hydraulic jack 23, the electric lifting frame 51 and the laser ranging sensor, the laser ranging sensor measures the height between the electromagnet platform 52 and the ground, the height value is input into the controller, and the controller adjusts the height of the electromagnet platform 52 according to the height value.
During the use, firstly, pour into lower floor's material layer 6 in the rectangle opening mould on test platform 11, until lower floor's material layer 6 and rectangle opening mould height parallel and level, then with three clamping unit 12 on test platform 11, through deciding rotatory handle 122 rotation regulation elasticity for rectangle opening mould is fixed on test platform 11. Then, the upper layer 7 of material is laid, and two steel bars in the rectangular steel bar frame are embedded into the upper layer 7 of material.
Second, the buffer unit 43 is assembled.
Third, the wire rope 42 is connected with its end to the circular iron ring 31 of the rectangular reinforcing frame, and the other end of the wire rope 42 is connected with the upper connecting hook 432 of the buffer unit 43, and then connected with the iron ball 44 using the lower connecting hook 436 of the buffer.
Fourth, the movable platform 22 is adjusted to move the two electro-hydraulic jacks to the central position of the upper material layer 7. The required load pressure is then applied to the electro-hydraulic jacks 23 so that the jacks press down on the upper layer 7 of material.
Next, the electromagnet stage 52 is energized to attract the iron ball 44 to the electromagnet stage 52, and the height thereof is raised to a desired height. Specifically, the laser distance measuring sensor can measure the distance to the ground all the time, the distance value is input into the controller, the controller can calculate the ideal tension limit which can be achieved by falling the ball according to a program input in advance, the distance value to the ground and the tension limit value are displayed on the display screen, and a test operator lifts the electromagnet platform 52 to the required height according to the required tension limit value.
Finally, the test is started, the power-off button of the electromagnet platform 52 is pressed, the iron ball 44 makes free-falling body motion within a few seconds, the steel cable 42 is tightened instantly, when the pulling force on the steel cable 42 is larger than the pressure-resistant value of the pressure-limiting steel plate 433 designed on the buffer unit 43, the steel plate is broken instantly, the piston 434 starts to move in the piston 434 under the action of the gravity of the iron ball 44, and the buffer material foamed ceramic is compressed until the speed of the iron ball 44 is reduced to zero. While the high speed camera records the changes between the two materials tested.
The wheel made of rubber plays a role in: when the test is carried out, if two pavement materials move relatively, the jack applying positive pressure also moves simultaneously, and the test piece to be tested in the whole test process is ensured to be under the same positive pressure action. Because the jack can not move along with the two road materials when the two road materials do relative motion if the wheels are not additionally arranged, the test material in the whole test process can not be subjected to positive pressure of the same degree, the error of the test result is larger, and secondly, the jack and the test material have larger load pressure in the vertical direction, and the tested piece can be damaged by instantaneous horizontal movement on the basis.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement, component separation or combination, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. Test device through mechanical behavior behind frictional force and normal pressure test road repair, including the support, its characterized in that, install fixed establishment, load mechanism, application of force mechanism, ball mechanism and elevating gear on the support, wherein:
the fixing mechanism is used for fixing a lower material layer of a road after the road is repaired and comprises a test platform and three clamping units, the test platform is installed above the support, a rectangular open die is installed in the middle of the upper portion of the test platform, the lower material layer is filled in the rectangular open die, an upper material layer is laid on the lower material layer, the three clamping units are installed on three sides of the test platform respectively, each clamping unit comprises a positioning steel sheet, a rotating handle and a nut, the positioning steel sheet is welded on the test platform and is close to the rectangular open die, the nut is welded on the test platform and is arranged opposite to the positioning steel sheet, the rotating handle is in threaded connection with the nut, and the end portion of the rotating handle can be abutted against the positioning steel sheet by rotating;
the load mechanism comprises a rigid support, a movable platform and two electric hydraulic jacks, the rigid support is mounted above the test platform, a sliding groove is formed in the rigid support, the movable platform is mounted on the sliding groove, and the two electric hydraulic jacks are welded on the lower end face of the movable platform in an inverted mode;
the force application mechanism is a rectangular steel bar framework, the rectangular steel bar framework is embedded into the upper material layer in a pre-embedding manner, the connecting edge of the rectangular steel bar framework is positioned on the outer side of the upper material layer, and a circular iron ring is welded on the connecting edge; the connecting edge is positioned on one side far away from the clamping unit;
the ball falling mechanism comprises a fixed pulley, a steel cable, a buffering unit and an iron ball, the fixed pulley is arranged on the test platform and is close to one side of the circular iron ring, one end of the steel cable is connected with the circular iron ring, and the other end of the steel cable bypasses the fixed pulley and is sequentially connected with the buffering unit and the iron ball;
the lifting device comprises an electric lifting frame, an electromagnet platform and a laser ranging sensor, wherein the electric lifting frame is installed on the test platform and close to one side of the circular iron ring, and the electromagnet platform is installed on the electric lifting frame.
2. The device for testing mechanical behavior of road after repair through friction and positive pressure as claimed in claim 1, wherein a wheel is installed at the bottom of each electro-hydraulic jack, and the wheel is made of rubber.
3. The device for testing mechanical behavior after road repair through friction and positive pressure according to claim 1, wherein the buffer unit comprises a cylindrical housing, an upper connecting hook, a pressure limiting steel plate, a piston rod and a lower connecting hook, the cylindrical housing comprises an upper housing and a lower housing which are in threaded connection, the upper connecting hook is fixed on the outer side of the upper end surface of the upper housing, the upper connecting hook is connected with the steel cable, the upper end of the pressure limiting steel plate is connected with the inner side of the upper end surface of the upper housing, the piston is arranged on the inner side of the lower housing, the lower end of the pressure limiting steel plate is connected with the upper end surface of the piston, the lower end surface of the piston is connected with the upper end surface of the piston rod, the lower end of the piston rod penetrates through the outer side of the lower end surface of the lower housing and is connected with the lower connecting hook, and the lower connecting hook is connected with the iron ball.
4. The device for testing mechanical behavior after road repair through friction and positive pressure according to claim 3, wherein a buffer layer is filled under the piston at the inner side of the lower case.
5. The device for testing mechanical behavior of a road after repair through friction and positive pressure as claimed in claim 4, wherein the buffer layer is made of a foamed ceramic material.
6. The apparatus for testing mechanical behavior of a road after repair through friction and positive pressure as claimed in claim 5, further comprising a viewing mechanism, wherein the viewing mechanism comprises a camera frame and a high speed camera, the camera frame is mounted on one side of the testing platform, and the high speed camera is mounted on the camera frame.
7. The device for testing mechanical behavior of a road after repair through friction force and positive pressure as claimed in claim 6, further comprising a controller, wherein the controller is respectively connected with the electric hydraulic jack, the electric lifting frame and the laser ranging sensor, the laser ranging sensor measures the height between the electromagnet platform and the ground and inputs the height value to the controller, and the controller adjusts the height of the electromagnet platform according to the height value.
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Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5457984A (en) * | 1994-05-20 | 1995-10-17 | The United States Of Americas As Represented By The Administrator Of National Aeronautics And Space Administration | Internally damped, self-arresting vertical drop-weight impact test apparatus |
| CN201867346U (en) * | 2010-07-23 | 2011-06-15 | 武汉理工大学 | Simulation test device for loosening and grain falling of anti-skid overlay material on road surface |
| CN202648907U (en) * | 2012-07-11 | 2013-01-02 | 广东省建筑科学研究院 | Automatic falling ball impact testing machine |
| CN203595634U (en) * | 2013-10-25 | 2014-05-14 | 长安大学 | Multifunctional asphalt pavement durability tester |
| CN104020003A (en) * | 2014-06-12 | 2014-09-03 | 浙江工业大学 | Ball dropping testing machine for testing optimal collision energy of materials |
| JP2014222095A (en) * | 2013-05-14 | 2014-11-27 | 株式会社安藤・間 | Friction damper |
| CN204127017U (en) * | 2014-09-15 | 2015-01-28 | 常州力安液压设备有限公司 | Pressure limiting hydraulic jack |
| CN204154625U (en) * | 2014-09-28 | 2015-02-11 | 中材（天津）粉体技术装备有限公司 | A kind of device measuring granule materials coefficient of interal friction |
| CN105136587A (en) * | 2015-09-01 | 2015-12-09 | 武汉路源工程质量检测有限公司 | Bituminous mixture rutting test device |
| KR20160029519A (en) * | 2014-09-05 | 2016-03-15 | 엘지전자 주식회사 | Laundry treating apparatus |
| CN107622718A (en) * | 2016-07-13 | 2018-01-23 | 张芝媛 | Friction force demonstration device for teaching experiment |
| CN108603823A (en) * | 2015-12-16 | 2018-09-28 | 迪纳泰斯特国际有限公司 | Drop hammer deflection meter |
| CN208501452U (en) * | 2018-07-06 | 2019-02-15 | 河北工业大学 | A kind of device of tilting semi-rigid asphalt pavement inter-layer shearing strength test |
| CN208563663U (en) * | 2018-06-22 | 2019-03-01 | 刘雷 | A kind of steel building assembled light wall |
| CN109473902A (en) * | 2018-07-02 | 2019-03-15 | 金华送变电工程有限公司三为电力分公司 | A kind of high altitude operation prevents tool drop device |
| CN109612862A (en) * | 2018-12-10 | 2019-04-12 | 福建博海工程技术有限公司 | A kind of experimental provision and its method of the abrasion influence of simulation tyre braking system sliding friction road pavement |
| CN209245155U (en) * | 2018-11-01 | 2019-08-13 | 南京鑫业诚机器人科技有限公司 | A kind of novel counterweight structure |
| CN209732122U (en) * | 2019-03-28 | 2019-12-06 | 西北农林科技大学 | Warmhouse booth assembled film pressing device |
| CN211383546U (en) * | 2019-12-17 | 2020-09-01 | 武汉乐道物流有限公司 | Rotatable torque-reducing type buffering safety rope |
| CN211784868U (en) * | 2019-12-30 | 2020-10-27 | 韶关市翔和公路工程质量检测有限公司 | Be used for road surface material strength testing machine |
| CN212773410U (en) * | 2020-07-23 | 2021-03-23 | 中国建筑第二工程局有限公司 | Steel bar scaffold wall connecting piece structure |
| CN212794127U (en) * | 2020-07-15 | 2021-03-26 | 长沙瑞捷机械科技股份有限公司 | Frame turning device for vehicle production |
| CN213475151U (en) * | 2020-10-09 | 2021-06-18 | 湖北清瑞和环保科技有限公司 | Crushed concrete heavy object lifting device |
| CN113062936A (en) * | 2021-03-30 | 2021-07-02 | 西北工业大学 | Safety rope brake based on shear thickening fluid and braking method |
| KR20210083781A (en) * | 2019-12-27 | 2021-07-07 | 박재호 | A pool ball for toy |
| CN214284733U (en) * | 2020-10-29 | 2021-09-28 | 科沃斯机器人股份有限公司 | Self-moving device, safety rope and safety rope reliability detection device |
| CN215166592U (en) * | 2020-12-15 | 2021-12-14 | 长春工程学院 | Horizontal support for building construction embedded component |
| CN215262779U (en) * | 2021-05-31 | 2021-12-21 | 江苏库纳实业有限公司 | Falling ball testing device |
-
2023
- 2023-03-03 CN CN202310196609.XA patent/CN115876616B/en active Active
Patent Citations (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5457984A (en) * | 1994-05-20 | 1995-10-17 | The United States Of Americas As Represented By The Administrator Of National Aeronautics And Space Administration | Internally damped, self-arresting vertical drop-weight impact test apparatus |
| CN201867346U (en) * | 2010-07-23 | 2011-06-15 | 武汉理工大学 | Simulation test device for loosening and grain falling of anti-skid overlay material on road surface |
| CN202648907U (en) * | 2012-07-11 | 2013-01-02 | 广东省建筑科学研究院 | Automatic falling ball impact testing machine |
| JP2014222095A (en) * | 2013-05-14 | 2014-11-27 | 株式会社安藤・間 | Friction damper |
| CN203595634U (en) * | 2013-10-25 | 2014-05-14 | 长安大学 | Multifunctional asphalt pavement durability tester |
| CN104020003A (en) * | 2014-06-12 | 2014-09-03 | 浙江工业大学 | Ball dropping testing machine for testing optimal collision energy of materials |
| KR20160029519A (en) * | 2014-09-05 | 2016-03-15 | 엘지전자 주식회사 | Laundry treating apparatus |
| CN204127017U (en) * | 2014-09-15 | 2015-01-28 | 常州力安液压设备有限公司 | Pressure limiting hydraulic jack |
| CN204154625U (en) * | 2014-09-28 | 2015-02-11 | 中材（天津）粉体技术装备有限公司 | A kind of device measuring granule materials coefficient of interal friction |
| CN105136587A (en) * | 2015-09-01 | 2015-12-09 | 武汉路源工程质量检测有限公司 | Bituminous mixture rutting test device |
| CN108603823A (en) * | 2015-12-16 | 2018-09-28 | 迪纳泰斯特国际有限公司 | Drop hammer deflection meter |
| CN107622718A (en) * | 2016-07-13 | 2018-01-23 | 张芝媛 | Friction force demonstration device for teaching experiment |
| CN208563663U (en) * | 2018-06-22 | 2019-03-01 | 刘雷 | A kind of steel building assembled light wall |
| CN109473902A (en) * | 2018-07-02 | 2019-03-15 | 金华送变电工程有限公司三为电力分公司 | A kind of high altitude operation prevents tool drop device |
| CN208501452U (en) * | 2018-07-06 | 2019-02-15 | 河北工业大学 | A kind of device of tilting semi-rigid asphalt pavement inter-layer shearing strength test |
| CN209245155U (en) * | 2018-11-01 | 2019-08-13 | 南京鑫业诚机器人科技有限公司 | A kind of novel counterweight structure |
| CN109612862A (en) * | 2018-12-10 | 2019-04-12 | 福建博海工程技术有限公司 | A kind of experimental provision and its method of the abrasion influence of simulation tyre braking system sliding friction road pavement |
| CN209732122U (en) * | 2019-03-28 | 2019-12-06 | 西北农林科技大学 | Warmhouse booth assembled film pressing device |
| CN211383546U (en) * | 2019-12-17 | 2020-09-01 | 武汉乐道物流有限公司 | Rotatable torque-reducing type buffering safety rope |
| KR20210083781A (en) * | 2019-12-27 | 2021-07-07 | 박재호 | A pool ball for toy |
| CN211784868U (en) * | 2019-12-30 | 2020-10-27 | 韶关市翔和公路工程质量检测有限公司 | Be used for road surface material strength testing machine |
| CN212794127U (en) * | 2020-07-15 | 2021-03-26 | 长沙瑞捷机械科技股份有限公司 | Frame turning device for vehicle production |
| CN212773410U (en) * | 2020-07-23 | 2021-03-23 | 中国建筑第二工程局有限公司 | Steel bar scaffold wall connecting piece structure |
| CN213475151U (en) * | 2020-10-09 | 2021-06-18 | 湖北清瑞和环保科技有限公司 | Crushed concrete heavy object lifting device |
| CN214284733U (en) * | 2020-10-29 | 2021-09-28 | 科沃斯机器人股份有限公司 | Self-moving device, safety rope and safety rope reliability detection device |
| CN215166592U (en) * | 2020-12-15 | 2021-12-14 | 长春工程学院 | Horizontal support for building construction embedded component |
| CN113062936A (en) * | 2021-03-30 | 2021-07-02 | 西北工业大学 | Safety rope brake based on shear thickening fluid and braking method |
| CN215262779U (en) * | 2021-05-31 | 2021-12-21 | 江苏库纳实业有限公司 | Falling ball testing device |
Non-Patent Citations (3)
| Title |
|---|
| 何问慎 等: "潮湿状态下陶瓷地砖摩擦系数测试方法探讨", 佛山陶瓷 * |
| 张巨松 等: "透水路面路基性能的实验研究", 沈阳建筑大学学报(自然科学版) * |
| 殷刚 等: "塔式抽油机失载刹车装置", 装备制造技术 * |
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