CN116519479A - Tunnel concrete lining stress performance test equipment - Google Patents
Tunnel concrete lining stress performance test equipment Download PDFInfo
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- CN116519479A CN116519479A CN202310253688.3A CN202310253688A CN116519479A CN 116519479 A CN116519479 A CN 116519479A CN 202310253688 A CN202310253688 A CN 202310253688A CN 116519479 A CN116519479 A CN 116519479A
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- 238000011056 performance test Methods 0.000 title claims description 8
- 238000001514 detection method Methods 0.000 claims abstract description 60
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 17
- 239000010703 silicon Substances 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 238000010276 construction Methods 0.000 description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012372 quality testing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N3/02—Details
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The tunnel concrete lining stress performance testing device comprises a power module, a shell, a pressure sensor, an electromagnetic valve, a vibrating motor, a manual valve, a sealing plate, an air compressor, a control circuit, a detection circuit, a pressure detection circuit and a detection mechanism; the shell and the sealing plate are installed together, and the vibration motor is installed outside the shell; the detection mechanism comprises an electric linear sliding table, a motor speed reducing mechanism, a guide pipe, a movable rod and a rotating wheel which are arranged together, the pressure sensor, the two valves and the electromagnetic valve are respectively arranged outside the shell, and the air compressor exhaust pipe is connected with the electromagnetic valve air inlet pipe; the power module, the control circuit, the detection circuit and the pressure detection circuit are arranged in the element box and are electrically connected. The invention can apply acting force equally to any part of the lining structure model to carry out pressure test, and when the tested lining structure model breaks, the invention can prompt a tester at the first time, thereby bringing convenience to the tester and ensuring that the data is real and effective.
Description
Technical Field
The invention relates to the technical field of testing equipment, in particular to equipment for testing the stress performance of a tunnel concrete lining.
Background
In tunnel construction including subway, highway, railway etc., the lining structure of whole pouring is a comparatively extensive structural component of use. The quality of the lining structure actually manufactured is different under the influence of the cement label, the sand quality, the cement proportion, construction and other factors. Therefore, in order to ensure the construction quality and the like, the quality of the construction is detected after the site construction is completed.
In the existing tunnel lining structure detection, a hydraulic mechanism is generally used for applying acting force to a stress surface of a lining structure model (the lining structure model is manufactured by adopting the same material as cast-in-place and scaled down to be manufactured into a model test lining structure), the pressure is gradually increased until the lining structure model is cracked or damaged, and therefore performance data such as the compression of the lining structure are obtained. Although the existing test equipment meets the quality detection of the lining structure model to a certain extent, the existing test equipment is limited by the structure and has the following technical problems. First: when the pressure equipment applies an acting force to the tested lining structure model, the applied acting force is actually concentrated on a certain point position of the lining structure model, that is, the bearing data of the lining structure model obtained later is limited to the bearing data of the certain point position of the lining structure model, and the bearing data of the lining structure model cannot be obtained completely and accurately, so that potential safety hazards are caused to construction quality (for example, the tested point position has good quality, and a certain part which is not tested is at the side end of the lining structure model, and the part has poor quality and thinner thickness, so that the potential quality safety hazards exist). Second,: in the test, a tester is required to watch beside the test equipment in real time, and when the tested lining structure model is damaged, the accurate time of the corresponding damage is obtained under the corresponding pressure. Third,: in the test, the pressure is gradually increased from low to high in a short time to apply acting force to the lining structure model, so that the obtained data cannot effectively reflect how long the lining structure model is damaged under certain constant pressure, the obtained data is relatively single, and more useful data cannot be provided for improving the construction of an actual lining structure. In conclusion, the existing lining structure model quality test equipment has a larger technical improvement room.
Disclosure of Invention
In order to overcome the defects of the prior lining structure model quality testing equipment, which are caused by the limitation of the structure, the invention provides the tunnel concrete lining stress performance testing equipment which can detect the quality of the lining structure model under the combined action of related mechanisms through gradually increasing water pressure, can equally apply acting force to any part of the lining structure model to carry out pressure test, can test the bearing capacity of the lining structure model under constant pressure for a long time, prevents the problem of single testing lining structure model that one point position and the testing speed are too fast, does not need to watch the testing data on site by a tester in real time, can prompt the tester in the first time of the breakage of the tested lining structure model in a short message and on site alarm mode, thereby bringing convenience to the tester, and ensures that the obtained damage time data of the lining structure model under corresponding pressure are real and effective, and has favorable data support for the construction of an actual lining structure.
The technical scheme adopted for solving the technical problems is as follows:
the tunnel concrete lining stress performance testing device comprises a power module, a shell, a pressure sensor, an electromagnetic valve, a vibrating motor, a manual valve, a sealing plate and an air compressor, and is characterized by further comprising a control circuit, a detection circuit, a pressure detection circuit and a detection mechanism; the shell and the sealing plate are movably installed together in a sealing way, and the vibration motor is installed outside the shell; the detection mechanism comprises an electric linear sliding table, a motor speed reducing mechanism, a guide tube, a movable rod and a rotating wheel, wherein the lower end of the motor speed reducing mechanism is arranged on a sliding block of the electric linear sliding table, the lower end of the guide tube is arranged at the front end of a power output shaft of the motor speed reducing mechanism, a spring is sleeved at the lower part in the guide tube, the lower end of the movable rod is sleeved in the guide tube, a supporting frame is arranged at the upper end of the movable rod, the rotating wheel is rotatably arranged at the inner side of the supporting frame, two metal rings are arranged at the outer interval distance of the rotating wheel, two metal contact pieces are arranged at the side ends of the supporting frame, and the inner sides of the upper ends of the two contact pieces are respectively contacted with the two rings and electrically conducted; the manual valves are two, the pressure sensor, the two valves and the electromagnetic valve are respectively arranged outside the shell, and the exhaust pipe of the air storage tank of the air compressor is connected with the air inlet pipe of the electromagnetic valve; the power module, the control circuit, the detection circuit and the pressure detection circuit are arranged in the element box; the power output end of the control circuit is electrically connected with the power input end of the electric linear sliding table and the motor speed reducing mechanism, the signal output end of the pressure sensor is electrically connected with the signal input end of the pressure detection circuit, the power output end of the pressure detection circuit is electrically connected with the power input end of the electromagnetic valve, and the two contact pieces are electrically connected with the two signal input ends of the detection circuit respectively.
Furthermore, the sealing plate can also be replaced by a transparent pressure-resistant acrylic plate.
Further, the shell is provided with sealing rubber gaskets, the tested lining structure model is positioned in the shell, and the two rubber gaskets are respectively positioned at the front side and the rear side of the lining structure model.
Further, the inner diameter of the guide tube is larger than the outer diameter of the movable rod, and the outer diameter of the spring is smaller than the inner diameter of the guide tube and smaller than the outer diameter of the movable rod; the heights of the two metal rings are higher than the height of the support frame, and the rotating wheel is made of insulating materials.
Further, the solenoid valve is a normally closed spool solenoid valve.
Further, the control circuit comprises four sets of time control switches which are electrically connected, and two ends of a power input of the four sets of time control switches are respectively and electrically connected.
Further, the detection circuit comprises a resistor, an NPN triode, a silicon controlled rectifier, a PNP triode, a buzzer and a short message module which are electrically connected, wherein one end of the first resistor is connected with an emitter of the PNP triode and an anode of the silicon controlled rectifier, a collector of the NPN triode is connected with one end of the second resistor, the other end of the second resistor is connected with a base of the PNP triode, a collector of the PNP triode is connected with one end of a third resistor, the other end of the third resistor is connected with a control electrode of the silicon controlled rectifier, a cathode of the silicon controlled rectifier is connected with a buzzer and a positive power input end of the short message module, and a negative power input end and a trigger signal input end of the short message module are connected with a negative power input end of the buzzer and an emitter of the NPN triode.
Further, the pressure detection circuit comprises an adjustable resistor, a resistor, an NPN triode and a relay which are electrically connected, wherein the positive power input end and the control power input end of the relay are connected, one end of the adjustable resistor is connected with one end of the first resistor, one end of the second resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the base electrode of the NPN triode, the other end of the first resistor is connected with the emitter of the NPN triode, and the collector of the NPN triode is connected with the negative power input end of the relay.
The invention has the beneficial effects that: in the test of the invention, under the combined action of the pressure sensor and the pressure detection circuit, the quality of the lining structure model is detected by gradually increasing water pressure, the pressure test can be carried out by applying acting force to any part of the lining structure model by the water pressure equally, the pressure bearing capacity of the lining structure model can be tested under constant pressure for a long time, and the problems of single test data caused by a single point position of the lining structure model and too high test speed are prevented; according to the invention, a tester is not required to watch the test data on site manually in real time, the damage detection without dead angles can be carried out on the inner side ends of the lining structure model one by one under the actions of a control circuit, a detection mechanism, a detection circuit and the like, and when the tested lining structure model breaks, the tester can be prompted in a short message and on-site alarm mode at the first time. The invention brings convenience to testers, ensures that the obtained data of the damage time of the lining structure model under the corresponding pressure is real and effective, and provides more useful data for the construction of the actual lining structure. Based on the above, the invention has good application prospect.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a partially enlarged schematic construction of the present invention.
Fig. 3 is a circuit diagram of the present invention.
Detailed Description
The device for testing the stress performance of the tunnel concrete lining comprises a power supply module A1 (an alternating current 220V-direct current 12V switching power supply module), a metal shell 1, a pressure sensor A4, an electromagnetic valve DC, a vibration motor 2 (working voltage direct current 220V and power 1.5 KW), a manual valve 3, a metal sealing plate 4, a hollow rectangular sealing rubber pad 5 and an air compressor (not shown in the figure), and also comprises a control circuit 6, a detection circuit 7, a pressure detection circuit 8 and a detection mechanism; the rectangular shell 1 is of a hollow structure, a plurality of screw holes 101 are distributed around the front end of the shell 1 at intervals, a plurality of openings are formed around the sealing plate 4 and the rubber pad 5 respectively, a plurality of screws 9 respectively penetrate through the plurality of openings of the sealing plate 4 and the rubber pad 5 and are screwed into the screw holes at the front end of the shell 1, the sealing plate 4 is further arranged outside the front end of the shell 1 in a sealing mode, and the vibrating motor 2 is arranged in the middle of the front lower end of the shell 1 through screw nuts; the detection mechanism comprises a waterproof electric linear sliding table M2 (an electric linear sliding table finished product with working voltage of direct current 12V and power of 200W), a waterproof motor speed reducing mechanism M1 (a coaxial motor gear reducer finished product with working voltage of direct current 12V and power of 100W), a guide tube 10, a movable rod 11 and a rotating wheel 12, wherein the lower end of a shell of the motor speed reducing mechanism M1 is longitudinally arranged on a sliding block of the electric linear sliding table M2 through a screw nut, the outer side of the lower end of the rectangular guide tube 10 is welded at the front end of a power output shaft of the motor speed reducing mechanism M1, a spring 13 is sleeved at the inner lower part of the guide tube 10, the lower end of the rectangular movable rod 11 is sleeved at the inner upper part of the guide tube 10 and is positioned above the spring 13, a U-shaped support frame 14 is longitudinally welded at the upper end of the movable rod 11, a shaft lever in the middle part of the front end and the rear end of the rotating wheel 12 is tightly sleeved in a bearing inner ring arranged at the middle part of the inner side of the support frame 14, two metal copper rings 15 are respectively arranged at the front end and the rear end of the outer side of the rotating wheel 12 by a certain distance (3 mm), a right side upper end of the support seat 16 is arranged at the inner lower right side of the support frame 14, and two right side upper ends of the support seat 16 are respectively contacted with two right side upper end contact copper rings 17 respectively, and two right side upper ends of the support seat 17 are respectively contacted with each other and respectively; the middle part of the rear end of the shell 1 is provided with an opening, and wires connected with an electric linear sliding table, a motor speed reducing mechanism, a contact piece and the like are led out to the rear outer side end through the opening, and the opening is sealed by pressure-resistant sealant; the two manual valves are respectively arranged outside the upper end of the shell 1, the lower end of an air inlet pipe of the pressure sensor A4, the lower end of an air outlet pipe of the valve 3, the lower end of an air outlet pipe of the electromagnetic valve DC and the interior of the shell 1 are communicated, an air storage tank exhaust pipe of the air compressor is connected with an air inlet pipe of the upper end of the electromagnetic valve DC through a hose, and the second manual valve 3 is arranged outside the right end of the shell 1 and is communicated with the inner lower end of the shell 1; the power module A1, the control circuit 6, the detection circuit 7, and the pressure detection circuit 8 are mounted on a circuit board in the original case 18, and the element case 18 is mounted outside the upper front end of the housing 1.
As shown in fig. 1, 2 and 3, the metal sealing plate 4 can also be replaced by a transparent pressure-resistant acrylic plate (a tester can observe the situation in the shell through the acrylic plate). The shell 1 is provided with two rectangular hollow sealing rubber gaskets (not shown in the figure, the rubber gaskets correspond to the hollow part of the lining structure model, and the hollow structure is adopted), the tested lining structure model 19 is positioned in the shell 1, and the two rubber gaskets are respectively positioned at the front and rear outer side ends of the lining structure model 19, so that the front and rear side ends of the hollow part of the tested lining structure model 19 are sealed; the inner diameter of the guide tube 10 is larger than the outer diameter of the movable rod 11, and the outer diameter of the spring 13 is smaller than the inner diameter of the guide tube 10 and smaller than the outer diameter of the movable rod 11; the two metal copper rings 15 are higher than the supporting frame 14, and the rotating wheel 12 is made of insulating materials. The solenoid valve DC is a normally closed spool solenoid valve. The control circuit comprises four sets of time control switches A2, A3, A5 and A6 which are distributed through a circuit board, wherein two power input ends 1 and 2 pins of the four sets of time control switches A2, A3, A5 and A6 are respectively connected, a normally closed contact type power switch S2 and S1 is respectively arranged at the left and right sides of the front outer side end of a shell of a motor reducing mechanism M1, buttons of the two power switches S1 and S2 are positioned at the upper end, and the two power switches S1 and S2 are electrically connected in series between the positive electrode power output end 3 pin of the first set of time control switch A2 and the positive electrode power output end of the second set of time control switch A3 and the positive electrode power input end of the motor reducing mechanism M1. The detection circuit comprises resistors R, R and R2 which are connected through wiring of a circuit board, an NPN triode Q1, a silicon controlled rectifier VS, a PNP triode Q2, a buzzer BT and a short message module A7, wherein one end of the first resistor R is connected with an emitter of the PNP triode Q2, the anode of the silicon controlled rectifier VS, a collector of the NPN triode Q1 is connected with one end of the second resistor R1, the other end of the second resistor R1 is connected with a base of the PNP triode Q2, the collector of the PNP triode Q2 is connected with one end of a third resistor R2, the other end of the third resistor R2 is connected with a control electrode of the silicon controlled rectifier VS, a cathode of the silicon controlled rectifier VS is connected with an anode power input end of the buzzer BT and an anode power input end 1 pin of the short message module A7, and a cathode power input end 3 pin of a trigger signal input end of the short message module A7 is connected with an anode power input end of the buzzer BT and an emitter of the NPN triode Q1. The pressure detection circuit comprises an adjustable resistor RP1, resistors R3 and R4, an NPN triode Q3 and a relay K1 which are connected through circuit board wiring, wherein the positive power input end and the control power input end of the relay K1 are connected, one end of the adjustable resistor RP1 is connected with one end of a first resistor R3 and one end of a second resistor R4, the other end of the second resistor R4 is connected with the base electrode of the NPN triode Q3, the other end of the first resistor R3 is connected with the emitter electrode of the NPN triode Q3, and the collector electrode of the NPN triode Q3 is connected with the negative power input end of the relay K1.
As shown in fig. 1, 2 and 3, the vibration motor 2 is connected in series through a power switch, two poles of an alternating current 220V power supply are respectively connected through wires, the power input ends 1 and 2 pins of the power module A1 and the two poles of the alternating current 220V power supply are respectively connected through wires, the power output ends 3 and 4 pins of the power module A1 and the power input ends 1 and 2 pins of the pressure sensor A4, the power input ends 1 and 2 pins of the time control switch A2 of the control circuit, the power input ends of the silicon controlled rectifier VS anode of the detection circuit and the power input ends of the buzzer BT cathode of the detection circuit, and the power input ends of the control power input ends of the pressure detection circuit and the emitter of the NPN triode Q3 are respectively connected through wires. The 3, 4 feet of the time control switch A2 and A3 of the power output end of the control circuit, the 3, 4 feet of the time control switch A5 and A6 and the motor reducing mechanism M1, the positive and negative poles of the electric linear slipway M2 are respectively connected with the two ends of the power input through wires. The signal output end 3 pin of the pressure sensor A4 is connected with the other end of the signal input end adjustable resistor RP1 of the pressure detection circuit through a wire, the normally closed contact end of the power output end relay K1 of the pressure detection circuit and the emitting electrode of the NPN triode Q3 are respectively connected with the two power input ends of the electromagnetic valve DC through wires, and the two metal copper rings 15 are respectively connected with the other end of the two signal input end resistors R of the detection circuit and the base electrode of the NPN triode Q1 through wires through two contact pieces T (17).
Before the test, one rubber pad is placed at the rear end in the shell 1, then the hollow lining structure model 19 is placed in the shell 1, the other rubber pad is placed at the front end in the shell 1 (the two rubber pads are respectively positioned at the front and rear outer side ends of the lining structure model 19 and seal the front and rear side ends of the hollow part of the tested lining structure model 19), then the sealing plate 4 is fixed through a screw rod (the detection mechanism is usually positioned in the shell, the detection mechanism is placed in the lining structure model 19 from back to front during the test, a screw rod is respectively integrally formed at the front and rear middle sides of the inner lower end of the lining structure model 19 and the concrete, four screw rods are respectively sleeved in holes of fixing plates at the two side ends of the shell of the electric linear sliding table M2, then the electric linear sliding table is installed in the hollow part of the model through four screw rods by screwing four nuts, and the detection mechanism is taken down after the test. Then, the test personnel adds test water (specifically colored water can be added) into the shell through the water inlet pipe of the first valve 3, so that the test personnel can more intuitively know whether the water leakage phenomenon occurs due to the damage of the model at the hollow part in the model on the premise that the sealing plate adopts the acrylic plate, a funnel can be placed on the water inlet pipe of the valve during water adding, water is conveniently added), the valve 3 is closed after the water is fully added into the shell (the second valve 3 mainly plays a role of opening the valve after the test is finished, and water in the shell is discharged). After 220V alternating current power enters the power input end of the power module A1, on the premise that the main power switch SD is turned on, stable direct current 12V power output by 3 and 4 pins of the power module A1 enters the power input ends of the pressure sensor A4, the control circuit, the detection circuit and the pressure detection circuit, and the circuits and the sensors work electrically. After the control circuit is powered on, the 3 and 4 pins of the time control switches A2 and A3 alternately output 5 seconds of power sources to enter the positive and negative positive electrode power source input ends of the motor reducing mechanism M1 respectively (until the total power switch is closed), the power output shaft of the motor reducing mechanism M1 drives the guide tube, the movable rod, the rotating wheel and the like of the detecting mechanism to rotate from the left dead point to the right dead point within the time of powering on the positive electrode of the motor reducing mechanism M1, and the power output shaft of the motor reducing mechanism M1 drives the guide tube, the movable rod, the rotating wheel and the like of the detecting mechanism to rotate from the right dead point to the left dead point within the time of powering on the positive electrode of the motor reducing mechanism M1. Because the two power switches S1 and S2 are electrically connected in series between the time control switch A2 and the positive power output 3 pin of the time control switch A3 and the positive and negative power input two ends of the motor reducing mechanism M1, when the power output shaft of the motor reducing mechanism M1 drives the guide tube, the movable rod, the rotating wheel and the like of the detecting mechanism to rotate to the right dead center or the left dead center, the right side or the left side of the guide tube 10 in a horizontal state can respectively press the button of the power switch S1 or S2, and the internal contact of the power switch S1 or S2 can be opened, so that the motor reducing mechanism M1 can lose electricity and no longer work (the motor reducing mechanism is not prevented from driving the related equipment to rotate leftwards when the motor reducing mechanism rotates to the left dead center), and the phenomenon that the guide tube, the movable rod, the rotating wheel and the like move to one side is not controlled is prevented, and the whole equipment cannot work normally is avoided. After the time control switches A5 and A6 are powered on, 3 and 4 pins of the time control switches A5 and A6 can alternately output power for 30 seconds to enter positive and negative electrode power supply input ends (until the total power switch is turned off) of the electric linear sliding table M2 respectively, during the time when the positive and negative electrodes of the electric linear sliding table M2 are powered on, the sliding block of the electric linear sliding table M2 drives the detection mechanism to move from a front dead center to a rear dead center, during the time when the negative electrodes of the electric linear sliding table M2 (the front and rear strokes of the sliding block are basically consistent with the front and rear lengths of the inside of the model) are powered on, the sliding block of the electric linear sliding table M2 drives the detection mechanism to move from a rear dead center to a front dead center (the front and rear ends of the shell of the electric linear sliding table are provided with limit switches), and when the sliding block moves to the rear dead center or the front dead center, the motor of the electric linear sliding table is powered off, and the motor drives the sliding block to move reversely through the relevant mechanism without limitation. Through the above, the invention can circularly drive the guide tube of the detection mechanism to move in the hollow part of the model from front to back, from back to front and from left to right and from right to left when working, and detect whether the model is damaged including cracking or not (after the power switch of the vibration motor 2 is opened, an electrician can vibrate the model in the shell, and the real working condition of the actual product under the influence of the running vibration of the vehicle can be simulated).
In the pressure detection circuit and the pressure sensor shown in fig. 1, 2 and 3, when the pressure at the outer end of the hollow part of the model in the shell is lower than the pressure set by an adjustable resistor RP1 (an adjustable resistor handle is positioned at the front outer end of the element box, the outer end of the ring handle is marked with continuous numbers and represents the pressure value in the shell), the voltage of the signal output by the 3 pin of the pressure sensor A4 is relatively low, the voltage signal is divided by the adjustable resistor RP1 and the resistor R3, the base electrode of the resistor R4 which enters the NPN triode Q3 after current limiting and voltage reducing is lower than the initial voltage of the NPN triode Q3, the NPN triode Q3 cannot be conducted, then the relay K1 keeps in a power-losing state, the control power input end and the normally closed contact end of the relay are closed, the solenoid valve DC power valve core is opened, compressed air output by the air compressor air storage tank enters the shell, and pressure is uniformly applied to all positions of the outer side end of the model. When the pressure of the outer side end of the hollow part of the model in the shell is lower than the pressure set by the adjustable resistor RP1, the signal voltage output by the 3 pin of the pressure sensor A4 is relatively high, the voltage signal is divided by the adjustable resistor RP1 and the resistor R3, the base electrode of the NPN triode Q3 is higher than the starting voltage of the NPN triode Q3 after the voltage is limited and reduced by the resistor R4, the NPN triode Q3 can conduct the collector electrode to output low level to enter the negative electrode power supply input end of the relay K1, the relay K1 can be electrified to suck the control power supply input end and the normally closed contact end of the relay K1 to open, then the solenoid valve DC power-off valve core is closed, and the compressed air output by the air storage tank of the air compressor does not enter the shell any more, and the pressure is not applied to the outer side end of the model. Through the method, the pressure resistance data of the model under the corresponding pressure can be detected by the pressure set by the adjustable resistor RP1 in the shell all the time in the test; specifically, when the resistance value of the adjustable resistor RP1 is regulated to be relatively large, the relative partial pressure between the adjustable resistor RP1 and the resistor R3 is large, so that the NPN triode Q3 is conducted when the pressure in the subsequent shell is relatively high, and then the solenoid valve DC power-off valve core is closed, that is, the pressure detection threshold value in the shell is relatively large; when the resistance value of the adjustable resistor RP1 is adjusted to be relatively small and the relative partial pressure between the adjustable resistor RP1 and the resistor R3 is small, the NPN triode Q3 is conducted when the pressure in the subsequent shell is relatively low, and then the solenoid valve DC power-off valve core is closed, namely the pressure detection threshold value in the shell is relatively small.
In the invention, as shown in fig. 1, 2 and 3, the movable rod 11 moves upwards along the guide tube 10 under the elastic force of the spring 13 (before the test starts, a tester presses the movable rod by hand, so that the height of the movable rod becomes lower and can be positioned in the hollow part of the model 19), then the upper end of the rotating wheel 12 contacts the inner side end of the model 19, when the motor speed reducing mechanism and the electric linear sliding table drive the rotating wheel to move left, right and back and forth, the upper end of the guide wheel contacts each part in the model one by one (the elastic force of the spring ensures that the upper end of the rotating wheel can contact the inner part of the model, when the height of the inner part of the model becomes lower, the movable rod compresses the spring to move downwards, and when the height of the inner part of the model becomes higher, the movable rod is pushed upwards by the spring to always contact the inner side end of the hollow part of the model, and the speed of the electric linear sliding table drive the rotating wheel to move back and forth can just meet the seamless contact of each part in the rotating wheel from front to back and forth. The rotating wheel 12 contacts the inner side end of the model, if the model is not cracked or damaged in other ways, the inner wall of the model is not provided with water, so that the two metal rings 15 are not connected with each other due to the fact that the water resistance value is infinite, the NPN triode Q1 is not connected, the short message module A7 and the buzzer BT are not powered on, and the model is not damaged. The rotating wheel 12 contacts the inner side end of the model, if the model is cracked and damaged in other modes, water enters the hollow part along the damage point under the action of pressure, water exists in the hollow inner wall of the model, so that the resistance value of the contact water between the two metal rings 15 is reduced, the positive pole of a 12V power supply enters the base electrode of the NPN triode Q1 through the resistor R, the water, the two metal rings 15 and the two contact sheets 17, the low level of the conduction collector output of the NPN triode Q1 enters the base electrode of the PNP triode Q2 through the current limiting and the voltage reducing of the resistor R1, the high level of the conduction collector output of the PNP triode Q2 enters the control pole of the controllable silicon VS through the current limiting and the voltage reducing of the resistor R2, the high level of the conduction cathode output of the controllable silicon VS enters the short message module A7 and the positive pole power supply input end of the buzzer BT, and the short message module A7 and the buzzer BT are electrically operated. The buzzer BT gives out a loud prompt sound after being powered on to prompt that a test personnel model on the site is damaged; after the short message module A7 is powered on, as the 3 pin, the 2 pin and the 4 pin of the power module A1 are connected, a short message stored in the short message module A7 can be sent out at the moment, and the remote end can know that the model is damaged in the first time after the mobile phone of a tester on site does not receive the short message.
In the test of the invention, the quality of the lining structure model is detected by gradually increasing water pressure through the combined action of all mechanisms and circuits, and the pressure test can be carried out by applying acting force to any part of the lining structure model by the water pressure equally, and the pressure bearing capacity of the lining structure model can be tested under constant pressure for a long time, so that the problems of single point position of the lining structure model and single test data caused by excessively high test speed are prevented; the method has the advantages that the test personnel do not need to watch the test data on site manually in real time, the damage detection without dead angles can be carried out on the inner side ends of the lining structure model one by one, and the test personnel can be prompted in a short message and on-site alarm mode at the first time when the tested lining structure model breaks. The invention brings convenience to testers, ensures that the obtained data of the damage time of the lining structure model under the corresponding pressure is real and effective, and provides more useful data for the construction of the actual lining structure. In fig. 3, the resistances of resistors R, R1, R2, R3, and R4 are 2K, 47K, 5.1K, 10K, and 100K, respectively; the relay K1 is a DC12V relay; the adjustable resistors RP1 are 470K (adjusted to 68K in this embodiment); the model number of NPN triodes Q1 and Q3 is 9013; the model Q2 of the PNP triode is 9012; the buzzer BT is an active continuous sound buzzer alarm finished product with the working voltage of 12V; the time control switches A2, A3, A5 and A6 are full-automatic microcomputer time control switch finished products of model KG316T, the microcomputer time control switch is provided with a display screen, seven keys, two power input ends 1 and 2 feet, two power output ends 3 and 4 feet, and seven keys are respectively pressed and operated, so that the interval time of the two power output ends outputting power and the time of outputting power each time can be set; the short message module A7 is a short message alarm module of the model GSM 800, the finished product of the short message alarm module is provided with two power input ends 1 and 2 pins and signal input ports 3 to 8 pins, after each signal input port inputs a low-level signal, the finished product of the short message alarm module can respectively send one short message (at most six short messages with different contents can be sent) through a wireless mobile network, and the short message alarm module of the embodiment stores one short message with the "model damaged" content; the silicon controlled rectifier VS is a plastic package unidirectional silicon controlled rectifier with the model MCR 100-1; the pressure sensor is a model MIK-P300 and is a pressure transmitter finished product, and the pressure sensor is provided with two power input ends and a signal output end, and when the pressure sensor is in operation, the signal output end can output a 0-5V dynamically-changing voltage signal according to different input pressure signals.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is limited to the details of the foregoing exemplary embodiments, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, the embodiments do not include only a single embodiment, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the embodiments in the examples may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
Claims (8)
1. The tunnel concrete lining stress performance testing device comprises a power module, a shell, a pressure sensor, an electromagnetic valve, a vibrating motor, a manual valve, a sealing plate and an air compressor, and is characterized by further comprising a control circuit, a detection circuit, a pressure detection circuit and a detection mechanism; the shell and the sealing plate are movably installed together in a sealing way, and the vibration motor is installed outside the shell; the detection mechanism comprises an electric linear sliding table, a motor speed reducing mechanism, a guide tube, a movable rod and a rotating wheel, wherein the lower end of the motor speed reducing mechanism is arranged on a sliding block of the electric linear sliding table, the lower end of the guide tube is arranged at the front end of a power output shaft of the motor speed reducing mechanism, a spring is sleeved at the lower part in the guide tube, the lower end of the movable rod is sleeved in the guide tube, a supporting frame is arranged at the upper end of the movable rod, the rotating wheel is rotatably arranged at the inner side of the supporting frame, two metal rings are arranged at the outer interval distance of the rotating wheel, two metal contact pieces are arranged at the side ends of the supporting frame, and the inner sides of the upper ends of the two contact pieces are respectively contacted with the two rings and electrically conducted; the manual valves are two, the pressure sensor, the two valves and the electromagnetic valve are respectively arranged outside the shell, and the exhaust pipe of the air storage tank of the air compressor is connected with the air inlet pipe of the electromagnetic valve; the power module, the control circuit, the detection circuit and the pressure detection circuit are arranged in the element box; the power output end of the control circuit is electrically connected with the power input end of the electric linear sliding table and the motor speed reducing mechanism, the signal output end of the pressure sensor is electrically connected with the signal input end of the pressure detection circuit, the power output end of the pressure detection circuit is electrically connected with the power input end of the electromagnetic valve, and the two contact pieces are electrically connected with the two signal input ends of the detection circuit respectively.
2. The tunnel concrete lining stress performance test equipment according to claim 1, wherein the sealing plate can be replaced by a transparent pressure-resistant acrylic plate.
3. The tunnel concrete lining stress performance testing device according to claim 1, wherein the shell is provided with sealing rubber gaskets, the tested lining structure model is arranged in the shell, and the two rubber gaskets are respectively arranged at the front side end and the rear side end of the lining structure model.
4. The tunnel concrete lining stress performance test equipment according to claim 1, wherein the inner diameter of the guide pipe is larger than the outer diameter of the movable rod, and the outer diameter of the spring is smaller than the inner diameter of the guide pipe and smaller than the outer diameter of the movable rod; the heights of the two metal rings are higher than the height of the support frame, and the rotating wheel is made of insulating materials.
5. The tunnel concrete lining stress performance test equipment according to claim 1, wherein the electromagnetic valve is a normally closed valve core electromagnetic valve.
6. The tunnel concrete lining stress performance test equipment according to claim 1, wherein the control circuit comprises four sets of time-controlled switches electrically connected, and two ends of a power input of the four sets of time-controlled switches are electrically connected respectively.
7. The tunnel concrete lining stress performance test device according to claim 1, wherein the detection circuit comprises a resistor, an NPN triode, a silicon controlled rectifier, a PNP triode, a buzzer and a short message module which are electrically connected, one end of the first resistor is connected with an emitter of the PNP triode, the anode of the silicon controlled rectifier, a collector of the NPN triode is connected with one end of the second resistor, the other end of the second resistor is connected with a base of the PNP triode, the collector of the PNP triode is connected with one end of a third resistor, the other end of the third resistor is connected with a control electrode of the silicon controlled rectifier, a cathode of the silicon controlled rectifier is connected with a positive power input end of the buzzer and the short message module, and a negative power input end and a trigger signal input end of the short message module are connected with a negative power input end of the buzzer and a negative power input end of the NPN triode.
8. The tunnel concrete lining stress performance test device according to claim 1, wherein the pressure detection circuit comprises an adjustable resistor, a resistor, an NPN triode and a relay which are electrically connected, wherein a positive power input end and a control power input end of the relay are connected, one end of the adjustable resistor is connected with one end of the first resistor, one end of the second resistor is connected with one end of the second resistor, the other end of the second resistor is connected with a base electrode of the NPN triode, the other end of the first resistor is connected with an emitter of the NPN triode, and a collector of the NPN triode is connected with a negative power input end of the relay.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117769229A (en) * | 2024-02-22 | 2024-03-26 | 长春吉大正元信息技术股份有限公司 | installation device of equipment monitoring data transmission encryption chip |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117769229A (en) * | 2024-02-22 | 2024-03-26 | 长春吉大正元信息技术股份有限公司 | installation device of equipment monitoring data transmission encryption chip |
| CN117769229B (en) * | 2024-02-22 | 2024-05-24 | 长春吉大正元信息技术股份有限公司 | Installation device of equipment monitoring data transmission encryption chip |
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