CN116124637B - Indoor calibration device for impact penetration test - Google Patents
Indoor calibration device for impact penetration test Download PDFInfo
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- CN116124637B CN116124637B CN202310049192.4A CN202310049192A CN116124637B CN 116124637 B CN116124637 B CN 116124637B CN 202310049192 A CN202310049192 A CN 202310049192A CN 116124637 B CN116124637 B CN 116124637B
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- 238000012360 testing method Methods 0.000 title claims abstract description 82
- 230000035515 penetration Effects 0.000 title claims abstract description 34
- 238000001179 sorption measurement Methods 0.000 claims description 66
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000011521 glass Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 21
- 239000002689 soil Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000010304 firing Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012625 in-situ measurement Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000005340 laminated glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an indoor calibration device for an impact penetration test, which comprises a test platform, a sample box and a transmitting system, wherein the transmitting system is arranged above the sample box through the test platform, so that the transmitting system obtains a basic transmitting distance and a basic transmitting angle, test media are filled in the sample box, the transmitting system transmits a penetration tester through the high-pressure gas ejection effect, the penetration tester moves downwards at a high speed with a set emergent angle and a target emergent speed and penetrates into the test media, and therefore, under the limitation of indoor height, the penetration tester obtains speeds equivalent to the impact penetration test media with different angles in the high air.
Description
Technical Field
The invention relates to the field of indoor calibration devices, in particular to an indoor calibration device for an impact penetration test.
Background
At present, the prior art does not disclose a technical means for carrying out remote survey and in-situ measurement on the ground mechanics in areas where personnel such as disaster areas are difficult to reach, and related feelers are still in a research and development stage, so the inventor develops feelers for penetrating soil in free falling bodies and collecting measured values of resistance parameters, penetration depth, acceleration and the like, but the feelers cannot directly obtain the ground mechanics parameters and also need to interpret according to interaction force between the feelers and the soil, namely: the developed feeler needs to be calibrated.
The calibration test is divided into an external field test and an indoor test, the external field test can utilize an unmanned aerial vehicle to carry a feeler to a certain height, and the feeler can obtain the speed and the kinetic energy required by penetration through free falling, but the large impact penetration speed can not be realized through the unmanned aerial vehicle carrying due to the limitation of the height of a house structure in the room.
Therefore, aiming at the actual external field working condition of unmanned aerial vehicle throwing, it is very necessary to establish an indoor calibration device for impact penetration in the indoor.
Disclosure of Invention
The invention aims to provide an indoor calibration device for an impact penetration test, which aims to solve the problem of how to emit a feeler indoors, so that the feeler obtains the landing speed equivalent to that of a free falling body in high air.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
An impact penetration test-oriented indoor calibration device, comprising: a test platform; the sample box is used for bearing a test medium; the emission system is arranged above the sample box through the test platform and is used for emitting the feeler through high-pressure gas ejection so that the feeler penetrates into a test medium at a set angle and a target emergent speed.
Further, the transmitting system includes: the device comprises an air source, a vacuum pump, an air chamber, a quick-opening valve, an adsorption chamber and a gun barrel; the air source is connected with the air chamber through a first electromagnetic valve and is used for outputting air to the air chamber so as to enable the air pressure to be accumulated in the air chamber; the vacuum pump is connected with the adsorption chamber, the adsorption chamber is communicated with the inside of the gun barrel through a vacuum adsorption port, and the vacuum pump is used for pumping gas in the adsorption chamber so that the vacuum adsorption port generates suction force for adsorbing the feeler probe; the gas chamber is connected with the adsorption chamber through the quick-opening valve, and when the quick-opening valve is opened, gas in the gas chamber enters the adsorption chamber and is sprayed out through the vacuum adsorption port, so that the feeler probe obtains power which moves along the gun barrel and penetrates into a test medium.
Further, the air chamber is connected with the adsorption chamber through a transmitting interface; the quick-opening valve includes: valve housing, valve chamber, piston and valve head; the valve shell is arranged in the air chamber, and an air channel communicated with the adsorption chamber is formed in the air chamber; the valve chamber is formed inside the valve housing and has a shape of a cylindrical cavity, one end of the valve chamber is connected to the air source through a second solenoid valve, and is connected to the atmosphere through a third solenoid valve, and the other end of the valve chamber is directed toward the adsorption chamber and communicates with the inside of the air chamber; the piston is axially slidably arranged inside the valve chamber; the valve head is fixedly connected with the piston, and when the piston moves towards the adsorption chamber, the valve head seals the emission interface.
Further, the emission interface is in a round hole shape, the valve head is in a disc shape, the diameter of the valve head is larger than that of the emission interface, and the contact area of the valve head and the edge of the emission interface is smaller than the end surface area of the piston exposed in the air chamber.
Further, the gas source comprises: the air compressor, the high-pressure air cylinder group and the pressure reducing valve are sequentially connected, and the pressure reducing valve is connected with the air chamber and the valve chamber.
Further, a loading cabin is formed at one end of the gun barrel, which is close to the adsorption chamber, and is provided with a cabin door, and the cabin door is connected with the loading cabin in an openable or lockable manner; and one end of the gun barrel, which is far away from the adsorption chamber, is provided with a stopper.
Further, the air chamber, the quick-opening valve, the adsorption chamber and the gun barrel form a gun body, and the gun body is connected with the test platform through the buffer mechanism; the buffer mechanism includes: a gun body frame, a gun body support and a damper; the gun body frame is fixedly connected with a gun body; the gun body frame is connected with the gun body support in a sliding manner, and the gun body frame can slide along the axis of the gun barrel; the damper is connected with the gun body frame and the gun body support, and is used for buffering recoil of the gun body.
Further, the gun body support is connected with the test platform through the angle adjusting mechanism; the angle adjusting mechanism comprises a support outer frame and a rotating shaft; the support frame is fixedly connected with the test platform, the gun body support is connected with the support frame through the rotating shaft, the rotating shaft is close to the bottom of the support frame, and the axis of the rotating shaft is perpendicular to the axis of the gun barrel.
Further, the support frame and the gun body support are detachably connected through a positioning pin.
Further, the angle adjusting mechanism further comprises a motor, the motor is connected with the rotating shaft through a speed reducer in a transmission mode, and the motor, the speed reducer and the support frame are sequentially and fixedly connected.
Further, a laser is installed at the bottom of the support frame and used for emitting a laser beam, and the emitting track of the laser is parallel to the axis of the gun barrel.
Further, the sample box comprises: a case frame having a container shape with an open top; explosion-proof glass, transparent and arranged around the frame; the discharging window is arranged on the side face of the box body frame and is close to the bottom of the box body frame, and the discharging window is connected with the box body frame in an openable or lockable manner.
Further, the test platform comprises: a main body structure; a side fixing support fixedly connected with one side surface of the emission system; the side adjusting support is fixedly connected with the other side face of the emission system through a side adjusting base plate, and the side adjusting base plate is used for adjusting the installation gap between the side adjusting support and the side face of the emission system; and the top adjusting base plate is connected with the main body structure and the top surface of the emission system and is used for adjusting the installation clearance between the main body structure and the top surface of the emission system.
Further, the main body structure comprises a bottom bracket, a middle bracket and a top bracket which are sequentially connected from bottom to top; wherein: the bottom bracket is fixed on the ground; the middle support comprises a two-layer left support and a two-layer right support, a gap allowing the transmitting system to pass through is reserved between the two-layer left support and the two-layer right support, the tops of the two-layer left support and the two-layer right support are fixedly connected through a two-layer connecting frame, and the bottoms of the two-layer left support and the two-layer right support are fixedly connected through a connecting cross beam; the side fixing support, the side adjusting support and the top adjusting base plate are fixedly connected with the top support.
Further, the test platform further comprises a crane, the crane is connected with the highest part of the main body structure through a crane support, and the crane is used for lifting the emission system.
Compared with the prior art, the application has the following beneficial effects:
The utility model provides an indoor calibration device towards impact penetration test, arrange the transmission system in the top of sample box through the test platform to make the feeler obtain basic transmission distance and emission angle, fill test medium in the inside of sample box, the transmission system makes the feeler high-speed down move and penetrate into test medium through high-pressure gas ejection effect, thereby under the high restriction in room, make the feeler obtain the speed of landing when being equivalent to the high altitude free fall.
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 will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a block diagram of a transmitting system according to an embodiment of the present invention;
FIG. 3 is a sectional view showing the internal structure of a quick-opening valve according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a closing condition of a quick-opening valve according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an open condition of a quick-opening valve according to an embodiment of the present invention;
FIG. 6 is a schematic perspective view of a gun body according to an embodiment of the present invention;
FIG. 7 is a schematic perspective view of a gun body, a buffer mechanism and an angle adjusting mechanism according to an embodiment of the present invention;
FIG. 8 is a schematic perspective view of a buffer mechanism and an angle adjusting mechanism according to an embodiment of the present invention;
FIG. 9 is a schematic perspective view of a sample box according to an embodiment of the present invention;
FIG. 10 is a schematic perspective view of a test platform according to an embodiment of the present invention;
FIGS. 11 and 12 are schematic perspective views of a top bracket according to an embodiment of the present invention from two different viewing angles;
FIG. 13 is a schematic view of a partial structure of a top bracket according to an embodiment of the present invention;
FIG. 14 is a schematic perspective view of a top bracket with a gun body, a buffer mechanism and an angle adjusting mechanism;
Reference numerals in the drawings are respectively as follows:
1-a test platform; 11-a body structure; 111-bottom rack; 112-two-layer left bracket; 113-two-layer right stent; 114-two-layer connection rack; 115-connecting a beam; 116-grid mounting rack; 117-top rack; 118-reinforcing ribs; 119-a crane mount; 12-side fixed support; 13-side adjustment support; 131-side adjustment backing plate; 14-top adjusting backing plate; 15-a crane; 16-floor slab; 17-steel grating; 18-stairs; 19-guard rails;
2-a sample box; 21-a box frame; 211-forklift plates; 22-explosion-proof glass; 23-a discharge window; 24-hinges; 25-spring catch; 26-door lock;
A 3-transmitting system; 31-air source; 311-an air compressor; 312-high pressure gas cylinder group; 313-pressure relief valve; 32-air chambers; 321-an air chamber housing; 322-a first gas-injection port; 323-a first solenoid valve; 324-a first pressure relief valve; 325-gas passage; 33-quick opening valve; 331-a valve housing; 332-a second gas injection port; 333-valve chamber; 334-a piston; 335-a piston rod; 336-valve head; 337—a second solenoid valve; 338-a third solenoid valve; 339-second pressure relief valve; 34-an adsorption chamber; 341-an adsorption chamber housing; 342-vacuum suction; 343-vacuum adsorption port; 344-transmit interface; 345-flange; 35-a vacuum pump; 36-gun barrel; 361-loading bay; 362-bay door; 363-ejector; 37-a buffer mechanism; 371-a cannon body frame; 372-sliding sleeve; 373-slide bar; 374-a gun body support; 375-damper; 38-an angle adjustment mechanism; 381-a support frame; 382-spindle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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 be within the scope of the invention.
At present, the technical means for carrying out remote survey and in-situ measurement on the ground mechanics in the areas where people in disaster areas are difficult to reach are not disclosed in the prior art, and the related feeler instruments are still in a research and development stage.
For this reason, the inventors developed a feeler for penetrating soil in free fall and acquiring measured values of resistance parameter, penetration depth, acceleration, etc., but the feeler cannot directly obtain the ground mechanical parameter, and needs to interpret according to the interaction force of the feeler with the soil, namely: the developed feeler needs to be calibrated.
In order to accurately and rapidly acquire the ground mechanical parameters, a theoretical solution is firstly established according to a penetration mechanical equation and a cavity dynamic expansion model, a simulation solution of the ground mechanical parameters is established by using a finite element and object point method, and finally the theoretical solution and the simulation solution are calibrated by using an indoor calibration test, and a model database for typical soil mechanical parameter interpretation is established, so that rapid and accurate interpretation of the ground mechanical parameters is realized.
The calibration test is divided into an external field test and an indoor test, the external field test can be realized by carrying the feeler by using the unmanned aerial vehicle to a certain height, and the feeler can obtain the speed and the kinetic energy required by penetration through free falling, but the external field test cannot be realized by carrying the unmanned aerial vehicle due to the limitation of the height of a house structure. Therefore, aiming at the actual external field working condition of unmanned aerial vehicle throwing, it is very necessary to establish an impact penetration sounding test calibration platform indoors.
The mass of the feeler gauge is about 3.5kg, the total length is 600mm, the diameter of the front and middle ends is 35.7mm, the diameter of the tail end is 55mm, and the downward penetrating speed of 30m/s-150m/s is required to be realized in a room.
When the feeler probe penetrates into the soil, the resistance of the end part and the friction force of the side face are collected through the feeler probe, and the posture and the acceleration are collected through the triaxial gyroscope and the accelerometer.
According to the above technical requirements, the present embodiment provides an example, please refer to fig. 1 and 2, which utilize the high-pressure gas ejection action principle to realize the speed and angle acquisition of the impact penetration of the feeler probe indoors, and provide a platform for the indoor calibration test of the ground mechanical parameter interpretation, and the specific structure is as follows.
The indoor calibration device comprises: the test platform 1, the sample box 2 and the emission system 3;
The test sample box 2 is used for bearing a test medium, and the emission system 3 is arranged right above the test sample box 2 through the test platform 1;
the transmitting system 3 includes: a gas source 31, a vacuum pump 35, a gas chamber 32, a quick-opening valve 33, an adsorption chamber 34 and a gun barrel 36;
the gas source 31 is connected with the gas chamber 32, and the gas source 31 is used for outputting gas to the gas chamber 32 so as to enable the gas pressure to be accumulated in the gas chamber 32;
The vacuum pump 35 is connected with the adsorption chamber 34, the adsorption chamber 34 is communicated with the inside of the gun tube 36 through the vacuum adsorption port 343, and the vacuum pump 35 is used for pumping gas in the adsorption chamber 34 so that the vacuum adsorption port 343 generates suction force for adsorbing the feeler gauge;
The air chamber 32 is connected to the adsorption chamber 34 through a quick-opening valve 33, and when the quick-opening valve 33 is opened, the air inside the air chamber 32 enters the adsorption chamber 34 and is ejected through a vacuum adsorption port 343, so that the feeler obtains power that moves along the gun barrel 36 and penetrates into the test medium.
Specific:
the air chamber 32 includes an air chamber housing 321, an air chamber 32 is formed by a cavity in the air chamber housing 321, a first air injection port 322 is formed on the air chamber housing 321, and the first air injection port 322 is connected with the air source 31 through a first electromagnetic valve 323.
The adsorption chamber 34 includes an adsorption chamber housing 341, the adsorption chamber 34 is formed by a cavity in the adsorption chamber housing 341, a vacuum suction port 342 connected to a vacuum pump 35 is formed in the adsorption chamber housing 341, and the adsorption chamber housing 341 is connected to the barrel 36 through a flange 345.
The test medium is a soil sample.
The working principle of the indoor calibration device is as follows:
Closing the quick-opening valve 33, opening the first electromagnetic valve 323 and the vacuum pump 35, increasing the air pressure in the air chamber 32, and decreasing the air pressure in the adsorption chamber 34;
Placing a feeler inside the gun barrel 36 and attaching the feeler to the vacuum adsorption port 343, wherein the feeler is adsorbed at the beginning end of the gun barrel 36 by the negative pressure of the vacuum adsorption port 343;
When the air pressure in the air chamber 32 reaches a predetermined value, the first electromagnetic valve 323 and the vacuum pump 35 are closed, the quick-opening valve 33 is opened, and the air in the air chamber 32 flows into the adsorption chamber 34 through the quick-opening valve 33 and is ejected through the vacuum adsorption port 343;
the feeler moves along the barrel 36 by the impact of the high-speed air flow, and punches out the end of the barrel 36, and then penetrates into the interior of the soil sample.
Optionally:
A fourth electromagnetic valve (not shown) may be installed between the vacuum pump 35 and the vacuum suction port 342, and when the gas inside the gas chamber 32 is discharged through the vacuum suction port 343, the connection between the vacuum suction port 342 and the vacuum pump 35 is disconnected by the fourth electromagnetic valve.
The vacuum pump 35 was 2XZ-1, and the pumping rate was 60L/min.
Optionally:
the specific structure of the quick-opening valve 33 is as follows, please refer to fig. 3.
The air chamber 32 is connected with the adsorption chamber 34 through a transmitting interface 344;
the quick-opening valve 33 includes: valve housing 331, piston 334 and valve head 336;
the valve housing 331 is provided inside the air chamber 32, and an air passage 325 which bypasses the valve housing 331 and communicates with the adsorption chamber 34 is formed inside the air chamber 32;
A valve chamber 333 is formed inside the valve housing 331 and has a cylindrical shape, one end of the valve chamber 333 is closed and a second gas injection port 332 is formed, the second gas injection port 332 is connected to the gas source 31 through a pipe, a second solenoid valve 337, and is connected to the atmosphere through a third solenoid valve 338 in this order, and the other end of the valve chamber 333 is directed toward the adsorption chamber 34 and communicates with the inside of the gas chamber 32;
The piston 334 is axially slidably provided inside the valve chamber 333 along the valve chamber 333;
Valve head 336 is connected to piston 334 by a rod of piston 334, valve head 336 sealing against firing interface 344 as piston 334 moves toward adsorption chamber 34.
The quick-opening valve 33 operates as follows.
The closing condition of the quick-opening valve 33 is shown in fig. 4:
the first solenoid valve 323 and the second solenoid valve 337 are opened, the third solenoid valve 338 is closed, the gas source 31 inputs gas into the gas chamber 32 and the inside of the valve chamber 333, the piston 334 moves toward the adsorption chamber 34 under the driving of the gas pressure, the valve head 336 covers the emission interface 344, and the connection between the gas chamber 32 and the adsorption chamber 34 is disconnected;
When the air pressure in the air chamber 32 reaches a predetermined value, the air pressure in the air chamber 32 is equal to the air pressure in the valve chamber 333, and the area of the surface of the piston 334 connected to the valve chamber 333 is larger than the area of the surface of the piston 334 connected to the air chamber 32, and the air pressure in the air chamber 32 acts on the edge of the valve head 336 (the contact portion between the valve head 336 and the end surface of the emission port 344), so that the piston 334 is always subjected to the air force to move itself toward the adsorption chamber 34 by the air pressure in the air chamber 32 and the valve chamber 333.
The opening condition of the quick-opening valve 33 is shown in fig. 4:
The first solenoid valve 323 and the second solenoid valve 337 are closed, the third solenoid valve 338 is opened, the gas inside the valve chamber 333 is released into the atmosphere through the third solenoid valve 338, one surface of the piston 334 connected with the air chamber 32 is rapidly separated from the adsorption chamber 34 under the action of the air pressure inside the air chamber 32, and the valve head 336 is driven to be rapidly separated from the emission interface 344, so that the rapid opening effect is realized.
Optionally:
emission port 344 is in the shape of a circular hole, valve head 336 is in the shape of a circular disk, and the diameter of valve head 336 > the diameter of emission port 344.
Optionally, please refer to fig. 2:
The air chamber 32 is connected to a pressure sensor for detecting the air pressure inside the air chamber 32, and when the air pressure inside the air chamber 32 rises to a predetermined value, the first electromagnetic valve 323 is closed.
The air chamber 32 is connected with a first pressure relief valve 324 for actively releasing the air when the air pressure inside the air chamber 32 is too high.
The third solenoid valve 338 is connected to the atmosphere through a second relief valve 339, and the second relief valve 339 is used to reduce noise when the gas inside the valve chamber 333 is discharged to the atmosphere.
The type of the electromagnetic valve is LIKTRF-8SW, and the type of the pressure release valve is LIKTRF-6SW.
Optionally:
The air source 31 includes: an air compressor 311, a high-pressure gas cylinder group 312, and a pressure reducing valve 313;
The air compressor 311, the high-pressure cylinder group 312, and the pressure reducing valve 313 are connected in this order, and the pressure reducing valve 313 connects the air chamber 32 and the valve chamber 333.
The model of the air compressor 311 is GSW200, the exhaust amount is 200L/min, and the air charging speed is calculated according to the formula: the pressure (kg) ×volume (cubic meters)/(displacement of air) (cubic meters per minute) =time (minutes) of filling, and the filling time required for filling the inside of the 15L gas chamber 32 with a gas pressure of 7MPa was calculated to be 5.25 minutes.
Considering the continuity of the test, the high-pressure gas cylinder group 312 with 120L and 31.5Mpa is adopted, the pressurizing pressure is set to 20MPa, the continuous pressurizing is calculated to be 120min, the continuous emission can be ensured for 20 times, and the test beat requirement is met.
The high-pressure gas cylinder group 312 is used for storing high-pressure air pressurized by the booster pump, and transmits gas with a prescribed pressure to the gas chamber 32 and the valve chamber 333 through the pressure reducing valve 313, so that a user can press the standby gas before the test, and the test efficiency can be quickened.
Optionally:
The air compressor 311, the first electromagnetic valve 323, the second electromagnetic valve 337, the third electromagnetic valve 338 and the pressure sensor are all electrically connected with the controller.
The controller is arranged in the control cabinet, the control cabinet can be placed in a remote control room for remote operation, the pressure change of the air chamber 32 is monitored in real time, and the air injection and emission operations are performed through remote control.
Optionally, please refer to fig. 6:
A loading bay 361 is formed at the end of the gun barrel 36 adjacent to the adsorption chamber 34, and the loading bay 361 is connected with a cabin door 362.
The hatch 362 may be opened by radial rotation or by axial sliding, and a worker opens the hatch 362 to place the feeler inside the barrel 36 and to allow the feeler to be sucked by the vacuum suction port 343.
The end of the gun barrel 36 remote from the adsorption chamber 34 is fitted with a stopper 363.
The maximum size of the barrel 36 (with the stopper 363) is phi 200mm x 3420mm.
The firing caliber of the gun tube 36 is phi 80mm, the firing quality is 3.5kg, the volume of the air chamber 32 is 15L, the firing speed is 30-150m/s, the gas injection pressure of the air chamber 32 is less than or equal to 10Mpa, and the firing beat is less than or equal to 20min.
Alternatively, please refer to fig. 7 and 8:
the air chamber 32, the quick opening valve 33, the adsorption chamber 34 and the gun barrel 36 form a gun body; the total length of the gun body is less than or equal to 4.2 meters, and the total weight is 950kg.
The big gun body passes through buffer gear 37 and connects test platform 1, and buffer gear 37 includes:
a gun body frame 371 fixedly connected with the gun body;
a sliding sleeve 372 fixedly connected to the barrel support 374, the axis of the sliding sleeve 372 being parallel to the axis of the barrel 36;
a slide bar 373 slidingly connected with the slide sleeve 372;
a gun body support 374 fixedly connected with the slide bar 373 so as to be slidingly connected with the gun body frame 371 through the slide sleeve 372;
a damper 375 connects the body frame 371 and the body support 374, the damper 375 being adapted to provide a cushion for recoil of the body.
Further:
since the feeler does not necessarily fall to the ground completely vertically when falling to the ground by the airdrop, the launching system 3 needs to achieve continuous adjustment of the penetration angle ±30° of the feeler, for which, please refer to fig. 7 and 8.
The gun body support 374 is connected with the test platform 1 through the angle adjusting mechanism 38.
The angle adjustment mechanism 38 includes:
The support outer frame 381 is connected with the gun body support 374 through a rotary shaft 382, the axis of the rotary shaft 382 is horizontally arranged, and the rotary shaft 382 is close to the bottom of the support outer frame 381;
a positioning pin (383) detachably connecting the support frame 381 and the body support 374, the positioning pin (383) being used for preventing the relative rotation of the support frame 381 and the body support 374 when the launching system 3 is carried;
A motor 384, which is connected with the rotary shaft 382 through a speed reducer 385 in a transmission way, the speed reducer 385 is fixedly connected with the support frame 381, and the motor 384 is used for driving the rotary shaft 382 to rotate so as to rotate the gun body support 374;
a rotary encoder (386), which is in transmission connection with the rotary shaft 382, the rotary encoder (386) being used for acquiring the rotation angle of the rotary shaft 382;
The laser (387) is fixedly connected with the bottom of the support frame 381, the emission track of the laser (387) is parallel to the gun barrel 36, the laser (387) is used for projecting a light spot below the gun barrel 36, a worker can judge the grounding position of the feeler gauge, and then the soil test box is moved to the grounding position.
Optionally:
Corner pieces are mounted at four corners of the support frame 381, and the corner pieces are used for reinforcing the strength of the four corners of the support frame 381;
the bottom of the support frame 381 is provided with a cross beam which is parallel to the support frame 381 and fixedly connected with two sides of the support frame 381, and the cross beam is used for increasing the bottom strength of the support frame 381;
a hanging ring is mounted on the top of the support frame 381, and is detachably connected to the top of the support frame 381, and the hanging ring is used for being connected with the crane 15.
Further:
The test personnel need to observe the structural change of the soil (or test medium) after the penetrometer is driven, and at the same time, need to observe the position of the light spot emitted by the laser, and this embodiment provides a sample box 2 which is convenient for the above operation, and the specific structure is as follows with reference to fig. 9.
The sample box 2 includes: a case frame 21 and an explosion-proof glass 22;
the blast resistant glazing 22 is disposed around the periphery of the frame.
The box frame 21 is in a three-dimensional rectangular shape, and a forklift plate 211 convenient to carry by using a forklift is arranged at the bottom;
The explosion-proof glass 22 is transparent explosion-proof toughened laminated glass and is respectively arranged on four vertical surfaces of the box frame 21; the explosion-proof toughened laminated glass is a composite glass product which is formed by permanently bonding two pieces of glass with the thickness of 6mm and one or more layers of organic polymer intermediate films (such as PVB polyvinyl butyral) between the two pieces of glass, and is safer than common toughened glass after being subjected to special high-temperature pre-pressing and high-temperature high-pressure process treatment.
Optionally:
a discharging window 23 is provided at a position of one side of the case frame 21 near the bottom thereof, the discharging window 23 is openably and closably connected with the case frame 21 by a hinge 24, and the discharging window 23 is closed by a spring lock 25 and a door lock 26.
The discharging window 23 is mainly used for rapidly discharging the sample medium in the sample box 2, and the test medium is used for determining whether to replace according to the test purpose or the test frequency.
Further, as shown in fig. 10-14:
The test platform 1 comprises:
A main body structure 11;
A side fixing support 12 fixedly connected to one side of the launching system 3;
The side adjusting support 13 is fixedly connected with the other side surface of the emission system 3 through a side adjusting base plate 131, and the side adjusting base plate 131 is used for adjusting the installation gap between the side adjusting support 13 and the side surface of the emission system 3;
A top adjustment shim plate 14 connecting the body structure 11 and the top surface of the launching system 3, the top adjustment shim plate 14 being used to adjust the mounting gap between the body structure 11 and the top surface of the launching system 3.
Optionally:
the main body structure 11 is a steel structure, and the main body structure 11 includes a bottom bracket 111, a middle bracket and a top bracket 117, and has an overall size of 6675mm (length) ×5560mm (width) ×7900mm (height), and a total weight of 12560kg.
Wherein:
The bottom bracket 111 is used for bearing, and the bottom bracket 111 is fixed on the ground through expansion screws;
The middle support comprises a two-layer left support 112 and a two-layer right support 113, a gap for the gun barrel 36 to pass through is reserved between the two-layer left support 112 and the two-layer right support 113, the tops of the two-layer left support 112 and the two-layer right support 113 are fixedly connected through a two-layer connecting frame 114, and the bottoms of the two-layer left support 112 and the two-layer right support 113 are fixedly connected through a connecting beam 115.
The side fixing support 12, the side adjusting support 13 and the top adjusting pad 14 are all fixedly connected with the top bracket 117.
A grid plate mounting frame 116 is mounted on the side of the connecting beam 115, and the grid plate mounting frame 116 is used for mounting a steel grid plate.
Optionally:
in order to increase the strength of the top bracket 117, reinforcing ribs 118 are provided above and below the connection portion of the top bracket 117 and the middle bracket.
Optionally:
For the convenience of walking, the main structure 11 is also provided with a floor slab 16, a steel grating 17, stairs 18 and guardrails 19.
Optionally:
The test platform 1 comprises a crane 15, the crane 15 being connected to a top support 117 by a crane mount 119.
The crane 15 adopts an electric hoist, which is used to connect the hanging ring at the top of the support frame 381 through the connected top, so as to suspend the launching system 3 to the top bracket 117.
Optionally:
Because the main body structure 11 is in the impact supporting working condition during the test and the main body structure 11 adopts the modularized design, the looseness of the connecting screw is not negligible. In the specific embodiment, the anti-loosening and anti-loosening of the connecting screw adopts a Nord-Lock anti-loosening washer and a thread compound. Nord-Lock is a safety system designed for bolting produced by NORD-LOCK AB, sweden, and the Nord-Lock washer consists of a pair of mutually meshed tooth face washers, one face of which is a wedge-shaped tooth face and the other face of which is a radial serration. The wedge-shaped tooth geometrical structure is adopted, so that the looseness of the bolt caused by vibration can be effectively prevented. The bolt is thought of as a spring and turning the fastener during tightening stretches the bolt just like a spring, thereby creating a clamping force that holds the components together. If the bolt tries to spin loose, the Nord-Lock washer will prevent the bolt from loosening by increasing the clamping force.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and it is intended to be within the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. An indoor calibration device for impact penetration test, which is characterized by comprising:
A test platform (1);
the sample box (2), the said sample box (2) is used for bearing the test medium;
The emission system (3) is arranged above the sample box (2) through the test platform (1), and the emission system (3) is used for emitting the feeler by high-pressure gas ejection so that the feeler penetrates into a test medium at a set angle and a target emergent speed;
the transmitting system (3) comprises: the device comprises an air source (31), a vacuum pump (35), an air chamber (32), a quick-opening valve (33), an adsorption chamber (34) and a gun barrel (36);
the air source (31) is connected with the air chamber (32) through a first electromagnetic valve (323), and the air source (31) is used for outputting air to the air chamber (32) so as to enable the air pressure to be accumulated in the air chamber (32);
The vacuum pump (35) is connected with the adsorption chamber (34), the adsorption chamber (34) is communicated with the inside of the gun barrel (36) through a vacuum adsorption port (343), and the vacuum pump (35) is used for pumping out gas in the adsorption chamber (34) so that the vacuum adsorption port (343) generates suction force for adsorbing the feeler;
The air chamber (32) is connected with the adsorption chamber (34) through the quick-opening valve (33), and when the quick-opening valve (33) is opened, air in the air chamber (32) enters the adsorption chamber (34) and is sprayed out through the vacuum adsorption port (343), so that the penetration tester obtains power which moves along the gun barrel (36) and penetrates into a test medium;
The air chamber (32), the quick-opening valve (33), the adsorption chamber (34) and the gun barrel (36) form a gun body, and the gun body is connected with the test platform (1) through a buffer mechanism (37);
the buffer mechanism (37) includes: a gun body frame (371), a gun body support (374) and a damper (375);
the gun body frame (371) is fixedly connected with a gun body;
The gun body frame (371) is in sliding connection with the gun body support (374), and the gun body frame (371) can slide along the axis of the gun barrel (36);
The damper (375) is connected with the gun body frame (371) and the gun body support (374), and the damper (375) is used for buffering the recoil of the gun body;
the gun body support (374) is connected with the test platform (1) through an angle adjusting mechanism (38);
the angle adjusting mechanism (38) comprises a support outer frame (381) and a rotating shaft (382);
The support frame (381) is fixedly connected with the test platform (1), the gun body support (374) is connected with the support frame (381) through the rotating shaft (382), the rotating shaft (382) is close to the bottom of the support frame (381), and the axis of the rotating shaft (382) is perpendicular to the axis of the gun barrel (36).
2. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The air chamber (32) is connected with the adsorption chamber (34) through a transmitting interface (344);
the quick-opening valve (33) includes: a valve housing (331), a valve chamber (333), a piston (334), and a valve head (336);
the valve housing (331) is arranged in the air chamber (32), and an air passage (325) communicated with the adsorption chamber (34) is formed in the air chamber (32);
The valve chamber (333) is formed inside the valve housing (331) and has a shape of a cylindrical cavity, one end of the valve chamber (333) is connected to the air source (31) through a second solenoid valve (337), and is connected to the atmosphere through a third solenoid valve (338), and the other end of the valve chamber (333) is directed toward the adsorption chamber (34) and communicates with the inside of the air chamber (32);
the piston (334) is axially slidably disposed inside the valve chamber (333);
The valve head (336) is fixedly connected to the piston (334), the valve head (336) sealing the emission port (344) as the piston (334) moves toward the adsorption chamber (34).
3. A chamber calibration device for impact penetration test as defined in claim 2, wherein,
The emission interface (344) is in a round hole shape, the valve head (336) is in a disc shape, the diameter of the valve head (336) is larger than that of the emission interface (344), and the contact area of the valve head (336) and the edge of the emission interface (344) is smaller than the end surface area of the piston (334) exposed in the air chamber (32).
4. A chamber calibration device for impact penetration test as defined in claim 2, wherein,
The gas source (31) comprises: the air compressor (311), the high-pressure air cylinder group (312) and the pressure reducing valve (313) are sequentially connected, and the pressure reducing valve (313) is connected with the air chamber (32) and the valve chamber (333).
5. The device for indoor calibration for impact penetration test according to claim 1, wherein,
A loading cabin (361) is formed at one end, close to the adsorption chamber (34), of the gun barrel (36), a cabin door (362) is arranged on the loading cabin (361), and the cabin door (362) is connected with the loading cabin (361) in an openable or lockable manner;
A stopper (363) is mounted at the end of the gun barrel (36) remote from the adsorption chamber (34).
6. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The support frame 381 and the gun body support 374 are detachably connected by a positioning pin 383.
7. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The angle adjusting mechanism (38) further comprises a motor (384), the motor (384) is in transmission connection with the rotating shaft (382) through a speed reducer (385), and the motor (384), the speed reducer (385) and the support outer frame (381) are sequentially and fixedly connected.
8. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The bottom of the support frame (381) is provided with a laser (387), the laser (387) is used for emitting a laser beam, and the emitting track of the laser (387) is parallel to the axis of the gun barrel (36).
9. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The sample box (2) comprises:
a box frame (21) having a container shape with an open top;
an explosion-proof glass (22) which is transparent and is arranged around the periphery of the frame;
and the discharging window (23) is arranged on the side surface of the box body frame (21) and is close to the bottom of the box body frame (21), and the discharging window (23) is connected with the box body frame (21) in an openable or lockable manner.
10. The device for indoor calibration for impact penetration test according to claim 1, wherein,
The test platform (1) comprises:
A main body structure (11);
A side fixing support (12) fixedly connected with one side surface of the emission system (3);
The side adjusting support (13) is fixedly connected with the other side face of the emission system (3) through a side adjusting base plate (131), and the side adjusting base plate (131) is used for adjusting the installation gap between the side adjusting support (13) and the side face of the emission system (3);
and a top adjusting pad (14) connected with the main body structure (11) and the top surface of the emitting system (3), wherein the top adjusting pad (14) is used for adjusting the installation clearance between the main body structure (11) and the top surface of the emitting system (3).
11. The device for indoor calibration for impact penetration test according to claim 10, wherein,
The main body structure (11) comprises a bottom bracket (111), a middle bracket and a top bracket (117) which are sequentially connected from bottom to top; wherein:
the bottom bracket (111) is fixed on the ground;
The middle support comprises a two-layer left support (112) and a two-layer right support (113), a gap for the transmission system (3) to pass through is reserved between the two-layer left support (112) and the two-layer right support (113), the tops of the two-layer left support (112) and the two-layer right support (113) are fixedly connected through a two-layer connecting frame (114), and the bottoms of the two-layer left support and the two-layer right support are fixedly connected through a connecting beam (115);
the side fixing support (12), the side adjusting support (13) and the top adjusting base plate (14) are fixedly connected with the top support (117).
12. A chamber calibration device for impact penetration test as defined in claim 10 or 11, wherein,
The test platform (1) further comprises a crane (15), the crane (15) is connected with the highest part of the main body structure (11) through a crane support (119), and the crane (15) is used for hoisting the emission system (3).
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| CN213600517U (en) * | 2020-11-18 | 2021-07-02 | 中国海洋大学 | Indoor power penetration test device |
| CN113802536A (en) * | 2021-07-15 | 2021-12-17 | 广东省交通规划设计研究院集团股份有限公司 | Large-depth standard penetration test device and test method |
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