CN108584792B - Mechanical lifting device for weak force test platform - Google Patents
Mechanical lifting device for weak force test platform Download PDFInfo
- Publication number
- CN108584792B CN108584792B CN201810634612.4A CN201810634612A CN108584792B CN 108584792 B CN108584792 B CN 108584792B CN 201810634612 A CN201810634612 A CN 201810634612A CN 108584792 B CN108584792 B CN 108584792B
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- oil
- lifting
- valve
- tray
- oil cylinder
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005484 gravity Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
- B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
Abstract
The invention discloses a mechanical lifting device for a weak force test platform, which comprises a lifting mechanism, a power mechanism and a control mechanism, wherein the lifting mechanism comprises a bracket, an oil cylinder and a tray; the power mechanism comprises a hydraulic oil inlet pipeline and a hydraulic oil outlet pipeline which are communicated with the oil cylinder, a lifting electromagnetic directional valve, a counterbalance valve, a first hydraulic control one-way valve, a first one-way throttle valve and a first electromagnetic directional valve are arranged on the hydraulic oil inlet pipeline, a second one-way throttle valve, a second hydraulic control one-way valve, a counterbalance valve and a lifting electromagnetic directional valve are arranged on the hydraulic oil outlet pipeline, and the first electromagnetic directional valve and the lifting electromagnetic directional valve are respectively connected with the control mechanism. The invention can drive the external disturbance mass block to lift in the vertical direction, and can realize the accurate control of the lifting position of the external disturbance mass block, thereby meeting the precision requirement of a weak force test platform.
Description
Technical Field
The invention relates to the field of weak force test equipment, in particular to a mechanical lifting device for a weak force test platform.
Background
The absolute gravimeter is mainly used for measuring the absolute value of the gravitational acceleration of the earth surface, the absolute gravimeter is used for measuring the change of the absolute gravity value of a specific area of the earth surface, and the absolute gravity value obtained by the absolute gravimeter reflects the distribution state of substances in the earth in the area. When the earth surface layer has an ore formation structure, the density of the ore formation object is generally different from the density of the surrounding crust, the density difference can generate gravity disturbance relative to a normal gravity field, the target difference of the disturbance object can be deduced through inversion calculation by utilizing the gravity disturbance and the size and the position of the geological structure, the characteristics of the ore body can be deduced according to the density difference, the geological structure fluctuation of the region is inverted, and the possible ore formation structure of the region is identified by combining the geological data analysis of the region.
After the absolute gravimeter is used for a period of time, the measurement precision of the absolute gravimeter can be changed, and the weak force test platform is used for detecting various indexes of the absolute gravimeter. When the weak force testing platform is used, a known gravitational field is additionally added outside the absolute gravimeter, the influence of the gravitational field on gravitational acceleration at different distances is calculated by utilizing a gravitational classical formula, then the gravitational acceleration change at the point is observed by an absolute gravimeter measuring technology, and compared with a theoretical value, and the sensitivity of the absolute gravimeter is analyzed and judged.
The weak force test platform mainly comprises an observation foundation pier, a lifting platform and an additional mass block, wherein the observation foundation pier is used for erecting an absolute gravimeter so as to reduce the influence of environmental interference factors on the observation instrument, the lifting mechanical device is used for lifting the displacement of an external additional mass body, and the external additional mass body is used for generating disturbance gravitation. The main function of the lifting platform is to lift the external disturbance mass block in the vertical direction, so that the external additional mass block approaches to the absolute gravimeter at different distances, and external gravitational fields with different magnitudes are applied, thereby detecting the perception sensitivity of the absolute gravimeter to the gravitational fields with different magnitudes in the vertical direction. The precision of the weak force test platform is considered, so that the measurement and control precision of the running position of the lifting platform is highly required. The existing lifting platform generally adopts a manual hoist, the problems of time and labor waste, poor safety and limited operation space exist in the lifting of the manual hoist, and the position of the manual hoist is difficult to control, so that the precision of the lifting platform is difficult to meet the requirement.
Disclosure of Invention
The invention aims to provide a mechanical lifting device for a weak force test platform, which can drive an external disturbance mass block to lift in the vertical direction and can realize accurate control of the lifting position of the external disturbance mass block, so that the accurate detection of the sensitivity of an absolute gravimeter is realized, and the precision requirement of the weak force test platform is met.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the mechanical lifting device for the weak force test platform comprises a lifting mechanism, a power mechanism and a control mechanism, wherein the lifting mechanism comprises a bracket, an oil cylinder and a tray, the bottom of the oil cylinder is arranged on the bracket, the tray penetrates through the bracket and is fixedly connected with the top of the oil cylinder, a balancing weight is arranged on the tray, and the oil cylinder is connected with the power mechanism;
the hydraulic oil outlet pipeline is sequentially provided with a second one-way throttle valve, a counter valve and a lifting electromagnetic reversing valve along the flow direction of hydraulic oil, the first electromagnetic reversing valve and the lifting electromagnetic reversing valve are respectively connected with the control mechanism, the oil cylinder is provided with a displacement sensor, and the displacement sensor is connected with the control mechanism;
the control mechanism adopts a PLC.
Preferably, the two oil cylinders are fixedly connected with the bottom of the tray respectively, the two first electromagnetic directional valves are arranged, and the two first electromagnetic directional valves are arranged on the hydraulic oil inlet pipelines of the two oil cylinders respectively.
Preferably, the bracket comprises a base and two anti-overturning sliding columns, the oil cylinder and the anti-overturning sliding columns are fixedly arranged on the base, and the tray penetrates through the two anti-overturning sliding columns and is fixedly connected with the upper end of the oil cylinder.
Preferably, the two oil cylinders and the two anti-overturning slide columns are arranged on the base at intervals, the two oil cylinders are symmetrically arranged along the center of the tray, and the two anti-overturning slide columns are symmetrically arranged along the center of the tray.
Preferably, the two anti-overturning slide posts are provided with an upper limit switch and a lower limit switch, and the upper limit switch and the lower limit switch are respectively connected with the control mechanism.
Preferably, the hydraulic station comprises an oil tank, a motor, an oil pump, an oil filter, an overflow valve, a liquid level meter and a pressure gauge, wherein the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are respectively communicated with the oil tank, the oil pump is arranged on the hydraulic oil inlet pipeline, the oil pump is connected with the motor, the overflow pipeline is arranged in the oil tank, the overflow valve and the pressure gauge are respectively arranged on the overflow pipeline, the liquid level meter is arranged in the oil tank, and the liquid level meter and the pressure gauge are respectively connected with the control mechanism.
Preferably, the balancing weight adopts a lead block, the lead block is a cylinder, a positioning upright post used for limiting the balancing weight is arranged in the middle of the tray, and the positioning upright post penetrates through the lead block.
According to the invention, the lifting mechanism is used for driving the external disturbance mass block to lift in the vertical direction, the power mechanism is used for providing power for the lifting mechanism, and the lifting position of the external disturbance mass block is controlled through the control mechanism, so that the accurate detection of the sensitivity of the absolute gravimeter is realized, and the precision requirement of a weak force test platform can be met; the lifting mechanism adopts the oil cylinder, the power mechanism can prevent the oil cylinder from drifting, prevent the balancing weight from falling under the action of gravity, and ensure that the oil cylinder stably rises and falls; the two cylinders are provided with displacement sensors, and the power mechanism acts under the action of the PLC according to the positions detected by the two displacement sensors, so that the two cylinders can synchronously ascend and descend, the balancing weight is ensured to stably ascend and descend, and meanwhile, the position of the balancing weight can be accurately controlled.
Drawings
FIG. 1 is a schematic view of a lifting mechanism according to the present invention;
FIG. 2 is a schematic diagram of a lifting mechanism according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a lifting mechanism when the oil cylinder of the present invention is lifted to the highest position;
fig. 4 is a schematic structural view of the power mechanism according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1 to 4, the mechanical lifting device for the weak force test platform comprises a lifting mechanism, a power mechanism and a control mechanism, wherein the lifting mechanism is used for driving a balancing weight to lift, the power mechanism is used for driving the lifting mechanism to act, the control mechanism is used for controlling the lifting of the lifting mechanism, the control mechanism comprises a PLC and a control panel, the control panel is used for setting the lifting height of the balancing weight, and the PLC is used for controlling the work of the power mechanism according to the height set by the control panel, so that the lifting height of the balancing weight is controlled.
The lifting mechanism comprises a support, an oil cylinder 4 and a tray 3, wherein the support comprises a base 5 and an anti-overturning slide column 1, the oil cylinder 4 and the anti-overturning slide column 1 are fixedly arranged on the base 5, the tray 3 passes through the anti-overturning slide column 1 and is fixedly connected with the upper end of the oil cylinder 4, a balancing weight 2 is arranged on the tray 3, in the embodiment, the balancing weight 2 adopts a lead block, the lead block is a cylinder, the middle part of the tray 3 is provided with a positioning upright post, the positioning upright post passes through the middle part of the lead block and is used for limiting the balancing weight 2; the two cylinders 4 and the two anti-capsizing slide columns 1 are arranged on the base 5 at intervals, the two cylinders 4 and the two anti-capsizing slide columns 1 are arranged along the central symmetry of the tray 3, the two cylinders 4 are provided with displacement sensors which are connected with the PLC, the two anti-capsizing slide columns 1 are provided with an upper limit switch and a lower limit switch, and the upper limit switch and the lower limit switch are respectively connected with the PLC.
The power mechanism comprises a hydraulic oil inlet pipeline 7 and a hydraulic oil outlet pipeline 13 which are communicated with the oil cylinders 4, wherein the hydraulic oil inlet pipeline 7 and the hydraulic oil outlet pipeline 13 are connected with the hydraulic station 6, a lifting electromagnetic directional valve 12, a counter valve 8, a first hydraulic control one-way valve 9-1, a first one-way throttle valve 10-1 and a first electromagnetic directional valve 11 are sequentially arranged on the hydraulic oil inlet pipeline 7 along the flow direction of hydraulic oil, two first electromagnetic directional valves 11 are respectively arranged on the hydraulic oil inlet pipelines 7 of the two oil cylinders 4, a second one-way throttle valve 10-2, a second hydraulic control one-way valve 9-2, a counter valve 8 and a lifting electromagnetic directional valve 12 are sequentially arranged on the hydraulic oil outlet pipeline 13 along the flow direction of hydraulic oil, and the first electromagnetic directional valve 11 and the lifting electromagnetic directional valve 12 are respectively connected with a PLC; in this embodiment, the lifting electromagnetic directional valve 12 is used to control the up-down displacement of the oil cylinder 4, and the lifting electromagnetic directional valve 12 adopts a three-position four-way electromagnetic valve, so that the oil pump is in an idle state when the oil cylinder 4 is in a static state, the counter balance valve 8 is used to avoid the falling of the counter balance weight 2 under the action of gravity, and the counter balance weight 2 is also more uniform and stable when lifted, the first hydraulic control one-way valve 9-1 and the second hydraulic control one-way valve 9-2 are mutually connected in parallel to form a double hydraulic control one-way valve, the double hydraulic control one-way valve is used to prevent the oil cylinder 4 from drifting, and simultaneously, the falling of the counter balance weight 2 can be prevented, the first one-way throttle valve 10-1 and the second one-way throttle valve 10-2 are used to set the rising and falling speeds of the counter balance weight 2, the first electromagnetic directional valve 11 is used to control the synchronous action of the oil cylinder 4, and the first electromagnetic directional valve 11 acts under the action of the PLC according to the positions detected by the two displacement sensors, so that the two oil cylinders 4 can rise and fall synchronously.
The hydraulic station 6 comprises an oil tank 6-3, a motor 6-1, an oil pump 6-2, an overflow valve 6-4, a liquid level meter 6-6 and a pressure gauge 6-5, wherein a hydraulic oil inlet pipeline 7 and a hydraulic oil outlet pipeline 13 are respectively communicated with the oil tank 6-3, the oil pump 6-2 is arranged on the hydraulic oil inlet pipeline 7, the oil pump 6-2 is connected with the motor 6-1, the oil tank 6-3 is internally provided with the overflow pipeline, the overflow valve 6-4 and the pressure gauge 6-5 are respectively arranged on the overflow pipeline, and the liquid level meter 6-6 is arranged in the oil tank 6-3.
When the lifting electromagnetic reversing valve works, under the action of the motor 6-1, the oil pump 6-2 drives hydraulic oil in the oil tank 6-3 to enter the oil cylinder 4 along the hydraulic oil inlet pipeline 7, the piston cylinder of the oil cylinder 4 pushes the balancing weight 2 to ascend, and when the balancing weight 2 touches the upper limit switch, the control mechanism controls the lifting electromagnetic reversing valve 12 to lose electricity, and the oil cylinder 4 stops moving; closing the motor 6-1, allowing the balancing weight 2 to fall under the action of gravity, allowing hydraulic oil in the oil cylinder 4 to flow back to the oil tank 6-3 through the hydraulic oil outlet pipeline 13, and controlling the lifting electromagnetic directional valve 12 to lose electricity by the control mechanism when the balancing weight 2 touches the lower limit switch, so that the oil cylinder 4 stops moving; in the ascending and descending process of the oil cylinder 4, the control mechanism can stop the balancing weight 2 at any position by controlling the opening and closing of the lifting electromagnetic directional valve 12.
The invention can drive the external disturbance mass block to lift in the vertical direction, and can realize the accurate control of the lifting position of the external disturbance mass block, thereby realizing the accurate detection of the sensitivity of the absolute gravimeter and meeting the precision requirement of a weak force test platform.
Claims (3)
1. A mechanical lifting device for weak force test platform, its characterized in that: the lifting mechanism comprises a bracket, an oil cylinder and a tray, wherein the bottom of the oil cylinder is arranged on the bracket, the tray penetrates through the bracket and is fixedly connected with the top of the oil cylinder, a balancing weight is arranged on the tray, and the oil cylinder is connected with the power mechanism;
the hydraulic oil outlet pipeline is sequentially provided with a second one-way throttle valve, a counter valve and a lifting electromagnetic reversing valve along the flow direction of hydraulic oil, the first electromagnetic reversing valve and the lifting electromagnetic reversing valve are respectively connected with the control mechanism, the oil cylinder is provided with a displacement sensor, and the displacement sensor is connected with the control mechanism; the lifting electromagnetic reversing valve is used for controlling the up-and-down displacement of the oil cylinder; the control mechanism adopts a PLC;
the two oil cylinders are fixedly connected with the bottom of the tray respectively, the two first electromagnetic directional valves are arranged, and the two first electromagnetic directional valves are arranged on the hydraulic oil inlet pipelines of the two oil cylinders respectively; the two oil cylinders and the two anti-overturning sliding columns are arranged on the base at intervals, the two oil cylinders are symmetrically arranged along the center of the tray, and the two anti-overturning sliding columns are symmetrically arranged along the center of the tray;
the hydraulic station comprises an oil tank, a motor, an oil pump, an oil filter, an overflow valve, a liquid level meter and a pressure gauge, wherein the hydraulic oil inlet pipeline and the hydraulic oil outlet pipeline are respectively communicated with the oil tank;
the support comprises a base and two anti-overturning sliding columns, the oil cylinder and the anti-overturning sliding columns are fixedly arranged on the base, and the tray penetrates through the two anti-overturning sliding columns and is fixedly connected with the upper end of the oil cylinder.
2. The mechanical lifting device for a weak force test platform of claim 1, wherein: an upper limit switch and a lower limit switch are arranged on the two anti-overturning slide posts, and the upper limit switch and the lower limit switch are respectively connected with the control mechanism.
3. The mechanical lifting device for a weak force test platform of claim 2, wherein: the balancing weight adopts the lead block, and the lead block is the cylinder, and the middle part of tray is provided with the location stand that is used for spacing to the balancing weight, and the location stand passes the lead block setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634612.4A CN108584792B (en) | 2018-06-20 | 2018-06-20 | Mechanical lifting device for weak force test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634612.4A CN108584792B (en) | 2018-06-20 | 2018-06-20 | Mechanical lifting device for weak force test platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108584792A CN108584792A (en) | 2018-09-28 |
| CN108584792B true CN108584792B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810634612.4A Active CN108584792B (en) | 2018-06-20 | 2018-06-20 | Mechanical lifting device for weak force test platform |
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| Country | Link |
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| CN (1) | CN108584792B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113735017B (en) * | 2020-05-29 | 2023-02-03 | 中冶宝钢技术服务有限公司 | Auxiliary device for equipment maintenance and use method thereof |
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|---|---|---|---|---|
| JP2007320690A (en) * | 2006-05-31 | 2007-12-13 | Nippon Sharyo Seizo Kaisha Ltd | Heavy load lifting device and heavy load lifting system |
| JP2010180973A (en) * | 2009-02-06 | 2010-08-19 | Ihi Corp | Method and device for synchronizing plurality of cylinders |
| CN104326401A (en) * | 2014-10-27 | 2015-02-04 | 陈伟 | Mobile cargo lift |
| CN106629486A (en) * | 2017-01-14 | 2017-05-10 | 山东职业学院 | Hydraulic automatic balancing control system based on PLC |
| CN107324243A (en) * | 2017-06-27 | 2017-11-07 | 张志通 | A kind of building machinery lowering or hoisting gear |
| CN207404794U (en) * | 2017-09-29 | 2018-05-25 | 济宁市技师学院 | Hydraulic elevating platform |
| CN208345685U (en) * | 2018-06-20 | 2019-01-08 | 中国科学院测量与地球物理研究所 | A kind of mechanical lift device for low force test platform |
-
2018
- 2018-06-20 CN CN201810634612.4A patent/CN108584792B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007320690A (en) * | 2006-05-31 | 2007-12-13 | Nippon Sharyo Seizo Kaisha Ltd | Heavy load lifting device and heavy load lifting system |
| JP2010180973A (en) * | 2009-02-06 | 2010-08-19 | Ihi Corp | Method and device for synchronizing plurality of cylinders |
| CN104326401A (en) * | 2014-10-27 | 2015-02-04 | 陈伟 | Mobile cargo lift |
| CN106629486A (en) * | 2017-01-14 | 2017-05-10 | 山东职业学院 | Hydraulic automatic balancing control system based on PLC |
| CN107324243A (en) * | 2017-06-27 | 2017-11-07 | 张志通 | A kind of building machinery lowering or hoisting gear |
| CN207404794U (en) * | 2017-09-29 | 2018-05-25 | 济宁市技师学院 | Hydraulic elevating platform |
| CN208345685U (en) * | 2018-06-20 | 2019-01-08 | 中国科学院测量与地球物理研究所 | A kind of mechanical lift device for low force test platform |
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| CN108584792A (en) | 2018-09-28 |
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