CN116519479A - A test equipment for the mechanical performance of tunnel concrete lining - Google Patents

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

A test equipment for the mechanical performance of tunnel concrete lining

technical field

The invention relates to the technical field of testing equipment, in particular to a testing equipment for the mechanical performance of tunnel concrete lining.

Background technique

In the construction of tunnels including subways, highways, and railways, the integrally poured lining structure is a widely used structural component. Affected by the grade of cement used, the quality of sand and the proportion of cement, and other factors such as construction, the quality of the actual lining structure will vary. Therefore, in order to ensure the quality of construction, etc., the quality of the site construction should be inspected after completion.

In the existing testing of tunnel lining structures, a hydraulic mechanism is generally used to apply force to the stress-bearing surface of the lining structure model (using the same material as the cast-in-place, scaled down to make a model to test the lining structure), and the pressure is gradually increased until The lining structure model is cracked or damaged, so as to obtain the performance data of the lining structure such as compression. Although the existing test equipment meets the quality inspection of the lining structure model to a certain extent, there are still many technical problems as follows due to the limitation of the structure. First: When the pressure equipment exerts force on the tested lining structure model, in fact, the applied force is concentrated on a certain point of the lining structure model, that is to say, the pressure data of the lining structure model obtained later, the actual The above is only limited to the pressure data of a certain point of the lining structure model, and it is impossible to obtain all accurate pressure data of the lining structure model, which will cause safety hazards to the construction quality (for example, the quality of the test point is very good, but in the lining structure model There is an untested part of the side end of the part, which is of poor quality and thin in thickness, so there are quality and safety risks). Second: During the test, testers are required to stand by the test equipment in real time, and when the tested lining structure model is damaged, the exact time of its corresponding damage under the corresponding pressure can be obtained. The above method will not only bring inconvenience to the testers, but also When the testers have no sense of responsibility and do not stick to the test equipment in real time, they cannot guarantee the authenticity and validity of the data obtained. Third: In the test, the pressure is usually applied to the lining structure model gradually from low to high in a short period of time. The data obtained in this way cannot effectively reflect how long the lining structure model will be damaged under a certain constant pressure. , the obtained data is relatively single, and cannot provide more useful data for improving the construction of the actual lining structure. To sum up, there is still a lot of room for technical improvement in the existing lining structure model quality testing equipment.

Contents of the invention

In order to overcome the disadvantages of the existing lining structure model quality testing equipment due to the limitation of the structure, the present invention provides a method for testing the quality of the lining structure model through the gradually increasing water pressure under the joint action of related mechanisms, and can test the lining structure model quality. Any part of the structural model is equally applied to the pressure test, and the pressure-bearing capacity of the lining structure model can be tested under constant pressure for a long time, preventing the single point of the lining structure model from being tested and the test speed being too fast. The test data is single, and the testers do not need to observe the test data on the spot in real time. The testers can be reminded by text messages and on-site alarms at the first time when the tested lining structure model is damaged, thus bringing the testers It is convenient, and ensures that the damage time data of the lining structure model under the corresponding pressure is true and valid, and provides a favorable data support for the construction of the actual lining structure. A tunnel concrete lining mechanical performance testing equipment.

The technical solution adopted by the present invention to solve its technical problems is:

A tunnel concrete lining mechanical performance testing equipment, including a power module, a shell, a pressure sensor, a solenoid valve, a vibration motor, a manual valve, a sealing plate, and an air compressor, is characterized in that it also has a control circuit, a detection circuit, a pressure Detection circuit, detection mechanism; the casing and the sealing plate are sealed and installed together, and the vibration motor is installed outside the casing; the detection mechanism includes an electric linear slide table, a motor deceleration mechanism, a guide tube, a movable rod, a rotating wheel, and a motor deceleration The lower end of the mechanism is installed on the sliding block of the electric linear slide table, and the lower end of the guide tube is installed on the front end of the power output shaft of the motor reduction mechanism. There is a support frame, and the rotating wheel is installed on the inside of the support frame. Two metal rings are installed on the outer distance of the rotating wheel. Two metal contact pieces are installed on the side of the support frame. The rings are in contact with each other and are electrically conductive; there are two manual valves, the pressure sensor, the two valves, and the solenoid valve are respectively installed outside the housing, and the exhaust pipe of the gas storage tank of the air compressor is connected with the intake pipe of the solenoid valve; The power supply module, control circuit, detection circuit, and pressure detection circuit are installed in the component box; the power output end of the control circuit is electrically connected to the power input end of the electric linear slide table and the motor reduction mechanism, and the signal output of the pressure sensor is The terminal is electrically connected to the signal input end of the pressure detection circuit, the power output end of the pressure detection circuit is electrically connected to the power input end of the solenoid valve, and the two contact pieces are electrically connected to the two signal input ends of the detection circuit respectively.

Further, the sealing plate can also be replaced by a transparent pressure-resistant acrylic plate.

Further, the housing is equipped with sealing rubber pads, the lining structure model to be tested is located in the housing, and two rubber pads are respectively located at the front and rear outer sides 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 height of the two metal rings is higher than the height of the support frame, and the rotating wheel is made of insulating material .

Further, the solenoid valve is a normally closed spool solenoid valve.

Further, the control circuit includes four sets of time-controlled switches electrically connected, and the two ends of the power input of the four sets of time-controlled switches are respectively electrically connected.

Further, the detection circuit includes electrically connected resistors, NPN transistors, thyristors, PNP transistors, buzzers and SMS modules, one end of the first resistor is connected to the emitter of the PNP transistors and the anode of the thyristor, and the NPN transistor The collector is connected to one end of the second resistor, the other end of the second resistor is connected to the base of the PNP transistor, the collector of the PNP transistor is connected to one end of the third resistor, and the other end of the third resistor is connected to the control electrode of the thyristor. The silicon-controlled cathode is connected to the positive power supply input terminal of the buzzer and the SMS module, and the negative power supply input terminal and trigger signal input terminal of the SMS module are connected to the negative power supply input terminal of the buzzer and the emitter of the NPN transistor.

Further, the pressure detection circuit includes electrically connected adjustable resistors, resistors, NPN transistors, and relays. The positive power supply input end of the relay is connected to the control power input end. One end of the resistor is connected, the other end of the second resistor is connected to the base of the NPN transistor, the other end of the first resistor is connected to the emitter of the NPN transistor, and the collector of the NPN transistor is connected to the negative power supply input end of the relay.

The beneficial effects of the present invention are: in the test of the present invention, under the joint action of the pressure sensor and the pressure detection circuit, the quality of the lining structure model is detected through the gradually increasing water pressure, and the water pressure can be applied equally to any part of the lining structure model. It can test the pressure bearing capacity of the lining structure model under constant pressure for a long time, which prevents the problem of single test data caused by a single test point of the lining structure model and too fast test speed; In the invention, there is no need for testers to observe the test data on site in real time. Under the action of the control circuit, detection mechanism and detection circuit, etc., the inner side of the lining structure model can be detected one by one without dead ends. When the lining structure model of the test is When a rupture occurs, the tester can be prompted by SMS and on-site alarm at the first time. The invention brings convenience to test personnel, and ensures that the obtained damage time data of the lining structure model under the corresponding pressure is true and valid, and provides more useful data for the construction of the actual lining structure. Based on the above, the present invention has good application prospects.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment.

Fig. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a partially enlarged structure of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed ways

As shown in Figures 1, 2, and 3, a tunnel concrete lining mechanical performance test equipment includes a power module A1 (AC 220V to DC 12V switching power supply module), a metal shell 1, a pressure sensor A4, a solenoid valve DC, a vibration Motor 2 (working voltage DC 220V, power 1.5KW), manual valve 3, metal sealing plate 4, hollow rectangular sealing rubber pad 5, air compressor (not shown in the figure), also has control circuit 6, detection circuit 7, Pressure detection circuit 8, detection mechanism; the rectangular housing 1 is a hollow structure, a plurality of screw holes 101 are distributed at a certain distance around the front end of the housing 1, and there are multiple openings around the sealing plate 4 and the rubber pad 5. The screw 9 passes through the multiple openings of the sealing plate 4 and the rubber pad 5 respectively and is screwed into the screw hole at the front end of the housing 1, and then the sealing plate 4 is sealed and installed outside the front end of the housing 1, and the vibration motor 2 is installed on the housing through the screw nut. The middle part of the front outer lower end of body 1; the detection mechanism includes waterproof electric linear slide table M2 (the finished product of electric linear slide table with working voltage DC 12V and power 200W), waterproof motor reduction mechanism M1 (coaxial motor gear with working voltage DC 12V and power 100W) Reducer finished product), guide pipe 10, movable rod 11, rotating wheel 12, the lower end of the housing of the motor reduction mechanism M1 is installed on the sliding block of the electric linear slide table M2 longitudinally through the screw nut, and the outer side of the lower end of the rectangular guide pipe 10 is welded on The front end of the power output shaft of the motor reduction mechanism M1 is covered with a spring 13 in the lower part of the guide tube 10. The lower end of the rectangular movable rod 11 is sleeved in the upper part of the guide tube 10 and is located on the spring 13. The upper end of the movable rod 11 is longitudinally welded with a spring 13. "U" type support frame 14, the shaft bar at the front and rear outer ends of the rotating wheel 12 is tightly sleeved in the bearing inner ring installed at the front and rear ends of the inner side of the support frame 14, and the outer front and rear ends of the rotating wheel 12 are separated by a certain distance (3 mm) for insulation The tight sleeve is equipped with two metal copper rings 15, an insulating support seat 16 is installed on the inner lower right upper end of the support frame 14, and a copper metal contact piece 17 is vertically installed on the front and rear ends of the right side of the support seat 16, respectively. The inner sides of the upper ends of the two contact pieces 17 and the outer lower ends of the two rings 15 are in contact with each other and are electrically conductive; there is an opening in the middle of the rear end of the housing 1, which is connected with the electric linear slide table, the motor deceleration mechanism, the contact piece, etc. The wires are led out to the rear outer side through the opening and the opening is sealed with pressure-resistant sealant; there are two manual valves, the pressure sensor A4, the first valve 3, and the solenoid valve DC are respectively installed outside the upper end of the housing 1, and the pressure sensor The lower end of the intake pipe of A4, the lower end of the outlet pipe of valve 3, the lower end of the outlet pipe of the solenoid valve DC and the inside of the shell 1 are interconnected, the exhaust pipe of the air compressor tank and the inlet pipe of the upper end of the solenoid valve DC are connected through a hose, the first Two manual valves 3 are installed on the outside of the right side of the housing 1 and the water inlet pipe communicates with the lower end of the housing 1; the power module A1, the control circuit 6, the detection circuit 7 and the pressure detection circuit 8 are installed on the circuit board in the original box 18 Above, the component box 18 is installed outside the upper front end of the housing 1 .

As shown in Figures 1, 2, and 3, the metal sealing plate 4 can also be replaced by a transparent pressure-resistant acrylic plate (the tester can also observe the situation in the housing through the acrylic plate). Shell 1 is equipped with two rectangular hollow sealing rubber pads (not shown in the figure, corresponding to the hollow part of the lining structure model, the rubber pad is a hollow structure), the lining structure model 19 to be tested is located in the shell 1, and the two rubber pads are respectively Located at the front and rear outer sides of the lining structure model 19, it seals the front and rear sides of the hollow part of the lining structure model 19 to be tested; 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 movable rod. The outer diameter of the rod 11; the height of the two metal copper rings 15 is higher than the height of the support frame 14, and the rotating wheel 12 is made of insulating material. The solenoid valve DC is a normally closed spool solenoid valve. The control circuit includes four sets of time-controlled switches A2, A3, A5, A6 wired on the circuit board, the power input terminals 1 and 2 of the four sets of time-controlled switches A2, A3, A5, A6 are connected respectively, and the motor speed reduction mechanism M1 A normally closed contact type power switch S2 and S1 are respectively installed on the left and right parts of the front outer side of the housing, and the buttons of the two power switches S1 and S2 are located at the upper end, and the two power switches S1 and S2 are electrically connected in series in the first set Time control switch A2, between the positive pole power supply output terminal 3 pin of the second set of time control switch A3 and the positive and negative pole power supply input ends of the motor reduction mechanism M1. The detection circuit includes resistors R, R1, R2 connected through circuit board wiring, NPN transistor Q1, SCR VS, PNP transistor Q2, buzzer BT and SMS module A7, the first resistor R and the emitter of PNP transistor Q2 1. SCR VS anode connection, NPN transistor Q1 collector is connected to the second resistor R1, the other end of the second resistor R1 is connected to the PNP transistor Q2 base, PNP transistor Q2 collector is connected to the third resistor R2 , the other end of the third resistor R2 is connected to the thyristor VS control pole, the cathode of the thyristor VS and the buzzer BT positive power input terminal and the positive power input terminal 1 of the SMS module A7, and the negative power input of the SMS module A7 Terminal 2 and trigger signal input terminal 3 are connected to the buzzer BT negative power supply input terminal and the emitter of NPN transistor Q1. The pressure detection circuit includes adjustable resistor RP1, resistors R3 and R4, NPN transistor Q3, relay K1 connected by circuit board wiring, the positive power input terminal of relay K1 and the control power input terminal are connected, one end of adjustable resistor RP1 is connected to the first resistor One end of R3 and one end of the second resistor R4 are connected, the other end of the second resistor R4 is connected to the base of the NPN transistor Q3, the other end of the first resistor R3 is connected to the emitter of the NPN transistor Q3, the collector of the NPN transistor Q3 is connected to the negative electrode of the relay K1 Power input connection.

As shown in Figures 1, 2 and 3, the vibrating motor 2 is connected in series via a power switch and the two poles of the AC 220V power supply are respectively connected by wires. Power output pins 3 and 4 of module A1, power input pins 1 and 2 of pressure sensor A4, control circuit power input pins 1 and 2 of time-controlled switch A2, detection circuit power input SCR VS anode And the buzzer BT negative power supply input terminal, the power supply input terminal of the pressure detection circuit, the relay K1 control power supply input terminal and the emitter of the NPN triode Q3 are respectively connected by wires. The power output terminal of the control circuit is the 3 and 4 pins of the time control switch A2 and A3, the 3 and 4 pins of the time control switch A5 and A6 and the positive and negative poles of the electric linear slide M2 and the positive and negative poles of the negative and positive poles. The terminals are respectively connected by wires. The signal output terminal 3 of the pressure sensor A4 is connected with the signal input terminal of the pressure detection circuit, and the other end of the adjustable resistance RP1 is connected by a wire. The power output terminal of the pressure detection circuit, the relay K1 normally closed contact terminal, the emitter of the NPN transistor Q3, and the solenoid valve DC The two ends of the power supply input are respectively connected by wires, and the two metal copper rings 15 are respectively connected by wires through two contact pieces T (17) and the other end of the resistance R of the two signal input terminals of the detection circuit and the base of the NPN transistor Q1. .

Shown in Figures 1, 2 and 3, before the test of the present invention, one of the rubber pads is placed on the rear end of the housing 1, then the hollow lining structure model 19 is placed in the housing 1, and the other rubber pad is placed Put it on the front end of the shell 1 (two rubber pads are respectively located at the front and rear outer ends of the lining structure model 19, and seal the front and rear sides of the hollow part of the lining structure model 19 to be tested), and then fix the sealing plate 4 through the screw (the detection mechanism usually Located in the casing, it is placed in the lining structure model 19 from the back to the front during the test. The lower end of the lining structure model 19 is integrally formed with the concrete on both sides of the front, rear, and middle parts respectively. One screw rod is integrally formed with the concrete, and the four screw rods are respectively set on the electric linear slide table M2 In the holes of the fixing plates on both sides of the shell, and then screw the four nuts into the four screw rods to install the electric linear slide table in the hollow part of the model, and remove the detection mechanism after the test). Then, testers add test water into the shell through the water inlet pipe of the first valve 3 (specifically, colored water can be added, so that the tester can understand the hollow part of the model more intuitively under the premise that the sealing plate is made of acrylic plate , Whether there is water leakage due to the damage of the model, when adding water, you can put a funnel on the valve inlet pipe, which is convenient for adding water), and close the valve 3 after the shell is filled with water (the main function of the second valve 3 is to open after the test is completed valve to discharge the water in the housing). After the 220V AC power enters the power input terminal of the power module A1, under the premise of turning on the main power switch SD, the stable DC 12V power output from pins 3 and 4 of the power module A1 enters the pressure sensor A4, the control circuit, the detection circuit, and the pressure detection circuit. At the power input end, the above-mentioned circuits and sensors are energized to work. After the control circuit is powered on, pins 3 and 4 of the time-controlled switches A2 and A3 will alternately output power for 5 seconds and enter the positive and negative and negative and positive poles of the motor reduction mechanism M1 respectively (until the main power switch is turned off). During the time when the positive and negative poles of the motor reduction mechanism M1 are energized, the power output shaft of the motor reduction mechanism M1 drives the guide tube, movable rod, and rotating wheel of the detection mechanism to rotate from the left dead point to the right dead point, and the motor speed reduction mechanism M1 During the time when the negative and positive poles are energized, the power output shaft of the motor reduction mechanism M1 drives the guide tube, movable rod, and rotating wheel of the detection mechanism to rotate from the right dead center to the left dead center. Since the two power switches S1 and S2 are electrically connected in series between the positive power output terminal 3 of the time control switch A2 and the time control switch A3 and the positive and negative power supply input ends of the motor reduction mechanism M1, the motor reduction mechanism When the power output shaft of M1 drives the guide tube, movable rod, rotating wheel, etc. of the detection mechanism to rotate to the right dead point or left dead point, the right side or left side of the guide tube 10 in the horizontal state at this moment will respectively press the power switch S1 or S2 button, the internal contact of power switch S1 or S2 will be open, so that the motor deceleration mechanism M1 will lose power and no longer work (it will not prevent the motor deceleration mechanism from driving the relevant equipment to turn left when turning to the right dead point, and turn to When the left dead point does not hinder the motor deceleration mechanism to drive the relevant equipment to rotate to the right), it prevents the uncontrolled movement of the guide tube, movable rod, rotating wheel, etc. to one side, causing the overall equipment to fail to work normally. After the time-controlled switches A5 and A6 are powered on, their 3 and 4 pins will output alternately for 30 seconds, and the power will respectively enter the positive and negative poles of the electric linear slide table M2 and the negative and positive pole power input terminals (until the main power switch is turned off), the electric linear slide table When the positive and negative poles of M2 are energized, the sliding block of the electric linear slide table M2 drives the detection mechanism to move from the front dead center to the rear dead point, and the electric linear slide table M2 (the front and rear travel of the sliding block is basically the same as the front and rear length of the model) During the time when the negative and positive poles are energized, the sliding block of the electric linear slide table M2 drives the detection mechanism to move from the rear dead point to the forward dead point (the front and rear ends of the shell of the electric linear slide table have limit switches, and the sliding block moves to the rear stop. At the point or front dead point, the motor of the electric linear slide table will lose power, and the motor will drive the sliding block to move in reverse without restriction through the relevant mechanism). Through the above, the present invention can cyclically 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, from left to right, and from right to left when working, and whether the model has The damage including cracking is detected (after the power switch of the vibration motor 2 is turned on, its electrified work vibrates the model in the housing, which can simulate the real working conditions of the actual product under the influence of the vibration of the vehicle).

As shown in Figures 1, 2, and 3, in the pressure detection circuit and pressure sensor, when the pressure at the outer end of the hollow part of the model in the shell is lower than the adjustable resistance RP1 (the adjustable resistance handle is located at the front outer end of the component box, the outer end of the ring handle Marked with continuous numbers, which represent the pressure value in the shell) When the pressure is set, the signal voltage output by pin 3 of the pressure sensor A4 is relatively low. After being pressed, the base of NPN transistor Q3 is lower than the initial voltage of NPN transistor Q3, and NPN transistor Q3 will not be turned on. Then, relay K1 remains in a power-off state, its control power input terminal and normally closed contact end are closed, and the solenoid valve DC When the energized spool is opened, the compressed air output from the air compressor tank enters the casing, and evenly applies pressure to all parts of the outer end of the model. When the pressure at the outer 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 pin 3 of the pressure sensor A4 is relatively high, and the voltage signal is divided by the adjustable resistor RP1 and the resistor R3 , after the resistance R4 limits the current and lowers the voltage, the base of the NPN transistor Q3 is higher than the initial voltage of the NPN transistor Q3. The NPN transistor Q3 will turn on the collector and output a low level and enter the negative power input terminal of the relay K1, and the relay K1 will be energized. If the control power input terminal and the normally closed contact terminal are open, then the solenoid valve DC power-off spool is closed, and the compressed air output from the air compressor storage tank no longer enters the housing, and no longer exerts pressure on the outer side of the model. Through the above, the present invention can ensure that during the test, the housing is always under the pressure set by the adjustable resistor RP1 to detect the pressure data of the model under the corresponding pressure; specifically, the resistance value of the adjustable resistor RP1 is adjusted relatively When it is large, the relative partial pressure between it and the resistor R3 is large, then when the pressure in the subsequent housing is relatively high, the NPN transistor Q3 will be turned on, and then the DC power-off valve core of the solenoid valve will be closed, that is to say, the present invention will reduce the pressure in the housing. The detection threshold becomes relatively larger; the resistance value of the adjustable resistor RP1 is adjusted to be relatively small, and the relative partial pressure between it and the resistor R3 is small, then when the pressure in the subsequent housing is relatively low, the NPN transistor Q3 will be turned on, and the solenoid valve DC will be lost. The electric spool is closed, that is to say, the present invention relatively reduces the pressure detection threshold in the casing.

Shown in Fig. 1, 2, 3, in the present invention, movable rod 11 can go up along guide pipe 10 under the elastic force of spring 13 (before testing, the tester presses down movable rod with hand, makes movable rod height become low energy Located in the hollow part of the model 19), so the upper end of the rotating wheel 12 contacts the inner side of the model 19, when the motor reduction mechanism and the electric linear slide drive the rotating wheel to move left, right and forward and backward, the upper end of the guide wheel will be in contact with each of the inner parts of the model one by one. Part contact (the elastic force of the spring ensures that the upper end of the rotating wheel can be in contact with the inside of the model. When the height inside the model becomes lower, the movable rod compresses the spring to go down. When the height inside the model becomes higher, the movable rod is pushed up by the spring and always touches the hollow part of the model. The inner end; the electric linear slide drives the rotating wheel to move back and forth at a speed that is just enough to meet the seamless contact between the rotating wheel and various parts of the model from front to back, from back to front). The rotating wheel 12 contacts the inner side of the model. If the model is not cracked or damaged in other ways, there is no water on the inner wall of the hollow. In this way, the resistance value between the two metal rings 15 is infinite because there is no water, and the NPN transistor Q1 will not be turned on. Then, Both the SMS module A7 and the buzzer BT will not work when powered on, which means that the model is not damaged. The rotating wheel 12 contacts the inner side of the model. If the model is cracked or damaged in other ways, under the action of pressure, water will enter the hollow part along the damaged point, and the hollow inner wall of the model will have water. In this way, between the two metal rings 15 As the contact water resistance value becomes smaller, the positive electrode of the 12V power supply enters the base of the NPN transistor Q1 through the resistor R, water, two metal rings 15, and two contact pieces 17, and the NPN transistor Q1 turns on the collector to output a low level and is limited by the resistor R1. The current step-down enters the base of the PNP transistor Q2, the PNP transistor Q2 turns on the collector and outputs a high level, through the resistor R2, the current is limited and the step-down enters the control electrode of the thyristor VS, and the thyristor VS is turned on and the cathode outputs a high level to enter the text message The module A7 and the buzzer BT positive power input terminal, so the SMS module A7 and the buzzer BT are energized to work. After the buzzer BT is powered on, it will emit a loud prompting sound, prompting the testers on site that the model has been damaged; after the SMS module A7 is powered on, since its pin 3 and pin 2 are connected to the pin 4 of the power module A1, it will be connected at this moment. A text message stored in the internal storage is sent out, and the remote tester who is not on site can know that the model is damaged as soon as the mobile phone receives the text message.

As shown in Figures 1, 2, and 3, through the joint action of all the above-mentioned mechanisms and circuits, in the test of the present invention, the quality of the lining structure model is detected through the gradually increasing water pressure, and any part of the lining structure model can be equally tested by the water pressure. Applying force to carry out pressure test can also test the pressure bearing capacity of the lining structure model under constant pressure for a long time, preventing the problem of single test data caused by a single test point of the lining structure model and too fast test speed; It does not require testers to observe the test data on site in real time, and can detect damage to the inner side of the lining structure model one by one without dead ends. When the tested lining structure model breaks, it can prompt the test through SMS and on-site alarm at the first time. personnel. The invention brings convenience to test personnel, and ensures that the obtained damage time data of the lining structure model under the corresponding pressure is true and valid, and provides more useful data for the construction of the actual lining structure. In Fig. 3, the resistance values of resistors R, R1, R2, R3, and R4 are 2K, 47K, 5.1K, 10K, and 100K respectively; relay K1 is a DC12V relay; ); the model of NPN transistor Q1 and Q3 is 9013; the model of PNP transistor Q2 is 9012; the buzzer BT is the finished product of active continuous sound buzzer alarm with working voltage DC 12V; the time control switch A2, A3, A5 and A6 are the models KG316T is a finished product of fully automatic microcomputer time control switch. The microcomputer time control switch itself has a display screen, and there are seven buttons, two power input terminals 1 and 2 pins, and two power output terminals 3 and 4 pins. One key, can set the interval time between the output power of the two power output terminals and the time of each output power; the SMS module A7 is a SMS alarm module of the model GSM 800, and the finished product of the SMS alarm module has two power input terminals 1 and 2 pins , signal input port 3-8 pin, after each signal input port inputs low-level signal, the finished product of SMS alarm module can send a short message (up to six different content short messages) through the wireless mobile network respectively, the SMS alarm module of this embodiment There is a short message with the content of "model damaged" stored in it; the thyristor VS is a plastic-encapsulated one-way thyristor of model MCR100-1; the pressure sensor is a model MIK-P300 is a finished product of a pressure transmitter, which has two power inputs Terminal, a signal output terminal, when working, the signal output terminal will output a dynamically changing voltage signal of 0-5V depending on the input pressure signal.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention. In some cases, the present invention can be implemented in other specific forms. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention.

In addition, it should be understood that although this specification is described according to an implementation mode, it does not mean that the implementation mode only includes an independent technical solution. The technical solutions in the embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (8)

1. A tunnel concrete lining mechanical performance testing equipment, comprising a power supply module, a housing, a pressure sensor, a solenoid valve, a vibrating motor, a manual valve, a sealing plate, and an air compressor, is characterized in that it also has a control circuit and a detection circuit , a pressure detection circuit, a detection mechanism; the casing and the sealing plate are sealed and installed together, and the vibration motor is installed outside the casing; the detection mechanism includes an electric linear slide, a motor reduction mechanism, a guide tube, a movable rod, and a rotating wheel, The lower end of the motor deceleration mechanism is installed on the sliding block of the electric linear slide, the lower end of the guide tube is installed on the front end of the power output shaft of the motor deceleration mechanism, the lower part of the guide tube is covered with a spring, the lower end of the movable rod is sleeved in the guide tube, the movable rod The upper end is equipped with a support frame, and the rotating wheel is installed on the inner side of the support frame. Two metal rings are installed on the outer distance of the rotating wheel. Two metal contact pieces are installed on the side end of the support frame. Only the rings are in contact with each other and are electrically conductive; there are two manual valves, the pressure sensor, the two valves, and the solenoid valve are respectively installed outside the shell, and the exhaust pipe of the gas storage tank of the air compressor and the intake pipe of the solenoid valve connection; the power module, control circuit, detection circuit, and pressure detection circuit are installed in the component box; the power output end of the control circuit is electrically connected to the power input end of the electric linear slide table and the motor reduction mechanism, and the pressure sensor The signal output end is electrically connected to the signal input end of the pressure detection circuit, the power output end of the pressure detection circuit is electrically connected to the power input end of the solenoid valve, and the two contact pieces are electrically connected to the two signal input ends of the detection circuit respectively. . 2. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that the sealing plate can also be replaced by a transparent pressure-resistant acrylic plate. 3. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that the housing is equipped with a sealing rubber pad, the lining structure model to be tested is located in the housing, and two rubber pads are respectively located on the lining structure model Front and rear outer ends. 4. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that 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 height of the two metal rings is higher than that of the supporting frame, and the rotating wheel is made of insulating material. 5. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that the solenoid valve is a normally closed solenoid valve. 6. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that the control circuit includes four sets of time-controlled switches electrically connected, and the two ends of the power input of the four sets of time-controlled switches are respectively electrically connected. connect. 7. A tunnel concrete lining mechanical performance testing device according to claim 1, wherein the detection circuit includes electrically connected resistors, NPN transistors, thyristors, PNP transistors, buzzers and SMS modules, One end of the first resistor is connected to the emitter of the PNP transistor and the anode of the thyristor, the collector of the NPN transistor is connected to one end of the second resistor, the other end of the second resistor is connected to the base of the PNP transistor, and the collector of the PNP transistor is connected to the third One end of the resistor is connected, the other end of the third resistor is connected to the control pole of the thyristor, the cathode of the thyristor is connected to the positive power input end of the buzzer and the SMS module, the negative power input end of the SMS module and the trigger signal input end are connected to the buzzer Connect to the negative power input terminal of the buzzer and the emitter of the NPN triode. 8. A tunnel concrete lining mechanical performance testing device according to claim 1, characterized in that the pressure detection circuit includes electrically connected adjustable resistors, resistors, NPN transistors, relays, relay positive power input terminals and control Connect to the power input terminal, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the NPN transistor, the other end of the first resistor is connected to the emitter of the NPN transistor, NPN The triode collector is connected to the negative power supply input terminal of the relay.