CN213574217U - Tunnel drainage pipe blockage monitoring system - Google Patents
Tunnel drainage pipe blockage monitoring system Download PDFInfo
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- CN213574217U CN213574217U CN202022463976.6U CN202022463976U CN213574217U CN 213574217 U CN213574217 U CN 213574217U CN 202022463976 U CN202022463976 U CN 202022463976U CN 213574217 U CN213574217 U CN 213574217U
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Abstract
A tunnel drainage pipeline blockage monitoring system is characterized in that a drainage pipe system is formed by connecting longitudinal drainage pipes and transverse drainage pipes, and a plurality of groups of monitoring units are arranged in the longitudinal drainage pipes between the adjacent transverse drainage pipes; the monitoring unit is as follows: the signal lamp mounting body is vertically arranged in the longitudinal drainage pipe, 3 signal lamps are vertically and uniformly distributed on the signal lamp mounting body, a sensor mounting body is arranged in the longitudinal drainage pipe at a certain distance from the signal lamp mounting body, 3 optical sensors are vertically and uniformly distributed on the sensor mounting body, and the signal lamps correspond to the optical sensors and are electrically connected with the monitoring device; the device overcomes the defects that the whole drainage system is often treated when the blockage of the tunnel drainage pipeline is cleaned in the prior art, the consumed cost and the time are huge, the treatment is targeted according to the monitoring condition, the manpower is saved, the treatment period is shortened, the treatment cost is reduced, and the treatment efficiency is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of drainage equipment or device are prevented in the tunnel, concretely relates to tunnel drainage pipe blocks up monitored control system.
Background
The tunnel drainage blind pipe and the drainage side ditch are important components of a tunnel lifeline, and the healthy operation of the tunnel drainage blind pipe and the drainage side ditch has extremely important social and economic significance for the safety of a traffic network. It is worth recognizing that the blockage of the tunnel drainage pipe in the karst area is an inevitable objective rule, the karst water is rich in a large amount of calcium ions, calcium carbonate crystal precipitation can be formed under certain conditions, and then the calcium carbonate crystal precipitation is evolved into crystallization blockage, so that attention is paid to the monitoring and treatment problems of the blockage of the drainage pipe in the water-rich tunnel. However, the prior art for treating the tunnel water blockage and drainage blockage lacks effective measures related to blockage monitoring and has the following problems:
1. the causes of blockage are many and are difficult to control in a targeted manner, and the causes of blockage can be broadly divided into two categories: firstly, crystallization blockage formed by calcium carbonate crystallization precipitation needs a long time to develop, crystallization blockage also enters a development period after a tunnel enters an operation period, and the crystallization blockage is difficult to discover once the formation is completed; secondly, because the longitudinal drainage pipe of the tunnel is longer, construction waste residues caused in the laying process are easily caused by aggregation blockage under the action of water flow impact force, and because the longitudinal drainage pipe is longer, the concealment of the blockage in the pipe is strong and difficult to find in time, and even if the construction waste residues are found after the laying of the pipe, the cleaning is very difficult.
2. Tunnel drainage pipe is because the construction is laid, pours inside the concrete, has extremely strong disguise, even because found disasters such as tunnel lining begins to appear percolating water and has confirmed that tunnel drainage pipe has appeared that the jam problem also is difficult to lock drainage pipe and blocks up the position, and it is very big to utilize prior art to clear up tunnel drainage pipe plug degree of difficulty.
3. The number of the water-rich tunnels is huge in China, and an effective monitoring system is lacked for judging whether a drainage system runs healthily. Generally, tunnel drainage pipes are laid along a long line, and a tunnel is not only provided with one lining water leakage phenomenon, so that sometimes the tunnel drainage pipes are blocked not only due to one blockage, but the whole drainage system is usually treated when the tunnel drainage pipes are cleaned in the prior art, so that the cost and the time are huge, and the waste caused by the treatment is immeasurable.
The existing tunnel drainage system does not have a system capable of better monitoring the development condition of the blockage of a tunnel drainage blind pipe, the service life and the driving safety of a tunnel are always influenced, so that the tunnel drainage system urgently needs a monitoring system capable of monitoring the development condition of the blockage of the tunnel drainage pipe and giving early warning in time, a tunnel builder can timely manage a position where a pipeline is blocked, the management cost is saved to the maximum extent, the driving safety of the tunnel is guaranteed, the service life of the tunnel is prolonged, and the maximum social and economic benefits are created.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a reasonable in design, simple structure, low cost, can be well to the tunnel drainage pipe in the tunnel drainage pipe jam monitoring system who develops degree in time hierarchical early warning.
The technical scheme for solving the technical problems is as follows: the drainage pipe system is formed by connecting a longitudinal drainage pipe and a transverse drainage pipe, and a plurality of groups of monitoring units are arranged in the longitudinal drainage pipe between the adjacent transverse drainage pipes;
the monitoring unit is as follows: the vertical setting of signal lamp installation body is in vertical drain pipe, and vertical equipartition is provided with 3 signal lamps on the signal lamp installation body, and one section distance is separated by with signal lamp installation body in the vertical drain pipe is provided with sensor installation body, and vertical equipartition is provided with 3 light sensor on the sensor installation body, and the signal lamp is corresponding with light sensor and is connected with monitoring devices electricity.
The utility model discloses a signal lamp installation body) goes up the signal lamp outside and is provided with the signal lamp protection casing.
The utility model discloses a sensor installation body optical sensor outside is provided with the sensor protection casing.
The utility model discloses a vertical drain pipe outside and sensor installation body) and signal lamp installation body contact department mutually are provided with sealed the pad.
The utility model discloses a monitoring devices has: a control circuit for controlling the operation of the whole device;
the output end of the sensor circuit is connected with the input end of the control circuit;
the signal conversion circuit is connected with the control circuit;
the input end of the communication circuit is connected with the output end of the control circuit;
the input end of the signal lamp circuit is connected with the output end of the control circuit;
and the input end of the alarm circuit is connected with the output end of the control circuit.
The utility model discloses a control circuit does: one end of a 19-pin crystal oscillator Y1 and one end of a capacitor C1 of an integrated circuit U1, the other end of a 18-pin crystal oscillator Y1 and one end of a capacitor C2, a 9-pin capacitor C3 is grounded through a resistor R1, a 10-pin communication circuit and an 11-pin communication circuit are connected, one end of a 10-pin switch S1 and a sensor circuit, a 17-pin alarm circuit, a 20-pin ground, a 40-pin power supply, and pins 39-32 are respectively connected with pins 2-9 and pins 1-8 of an exclusion P1, a 1-pin power supply and pins 5-7 of the exclusion P1 are connected with a signal lamp circuit, the other end of the switch S1 is connected with the power supply, the anode of the capacitor C3 is connected with the power supply, and the other ends of the capacitor C1 and the capacitor C2 are grounded; the integrated circuit U has a model number AT89C51 and a model number Header9 excluding P1.
The utility model discloses a signal conversion circuit does: pins 6, 8, 10, 12, 14, 16, 18 and 20 of the integrated circuit P6 are respectively connected with pins 1 to 8 of the integrated circuit U1, pins 11, 13, 15 and 19 of the integrated circuit P6 are grounded, and pins 2 and 9 of the integrated circuit P6 are connected with a power supply; the integrated circuit P6 is model ADC 0804.
The utility model discloses a signal lamp circuit does: the anode of the diode D1 is connected with the pin 5 of the resistor P1, and the cathode is grounded through a resistor R2; the anode of the diode D2 is connected with the pin 6 of the resistor P1, and the cathode is grounded through a resistor R3; the anode of the diode D3 is connected with the pin 7 of the resistor P1, and the cathode is connected with the ground through the resistor R4.
The utility model discloses a sensor circuit does: the pin 1 of the light sensor P2 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the pin 1 of the light sensor P3 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the 1 pin of the light sensor P4 is connected with the 16 pin, the 2 pin is connected with the power supply and the 3 pin is connected with the ground of the integrated circuit U1.
Because the utility model discloses a be provided with multiunit monitoring unit in the vertical drain pipe between adjacent horizontal drain pipe, can multiunit simultaneous working realize whole drainage system's control, also can monitor to a certain section, monitoring unit can monitor three kinds of jam situations, when appearing because of remaining in the inside construction discarded object aggregative jam of pipeline makes the drain pipe blocked completely, the light signal that 3 signal lamps sent is blocked completely, light sensor receives 0 light signal, control circuit is according to the signal of sensor circuit feedback, indicate to the host computer that this section pipeline has blocked completely basically and loses the drainage ability through communication circuit, should take corresponding treatment to clear up the blockage in the pipeline, alarm circuit sends alarm signal simultaneously; when the tunnel drain pipe is seriously blocked but not completely blocked, the optical sensor receives 1 optical signal, the control circuit sends a signal to the upper computer to prompt that the section of the pipeline is seriously blocked but not completely blocked, and whether the section of the pipeline needs to be treated or not can be considered according to the actual drainage condition; when the tunnel drain pipe is lightly blocked or the drainage condition is good, the optical sensors 1-4 receive the optical signals, and the control circuit sends signals to the upper computer to prompt that the section of the pipeline is lightly blocked or the drainage condition is good, so that cleaning of blocking objects is not needed. The defect that the whole drainage system is often treated when the blockage of the tunnel drainage pipeline is cleaned in the prior art, and the consumed cost and time are huge is overcome, the treatment is targeted according to the monitoring condition, the manpower is saved, the treatment period is shortened, the treatment cost is reduced, and the treatment efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the monitoring unit 1 in fig. 1.
Fig. 3 is a cross-sectional view of fig. 2.
Fig. 4 is another cross-sectional view of fig. 2.
Fig. 5 is an electrical schematic block diagram of the monitoring device 1-2 of fig. 2.
Fig. 6 is an electronic schematic diagram of the monitoring device 1-2 of fig. 2.
In the figure: 1. a monitoring unit; 2. a longitudinal drain pipe; 3. a transverse drain pipe; 1-1, a signal lamp mounting body; 1-2, a monitoring device; 1-3, a sensor mounting body; 1-4, a light sensor; 1-5, a sensor shield; 1-6, signal lamp protective cover; 1-7, signal lamp; 1-8 and a sealing gasket.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited to these examples.
Example 1
In fig. 1-4, the utility model relates to a tunnel drainage pipe blockage monitoring system, the drainage pipe system is formed by connecting longitudinal drainage pipes 2 and transverse drainage pipes 3, and a plurality of groups of monitoring units 1 are installed in the longitudinal drainage pipes 2 between the adjacent transverse drainage pipes 3; the number of the monitoring units 1 is determined according to the length of the longitudinal drain pipes 2 between the adjacent transverse drain pipes 3, and the monitoring units 1 monitor and warn whether the drain pipes in the interval are blocked or not and the blocking condition.
The monitoring unit 1 is formed by connecting a signal lamp mounting body 1-1, a monitoring device 1-2, a sensor mounting body 1-3, an optical sensor 1-4, a sensor protective cover 1-5, a signal lamp protective cover 1-6, a signal lamp 1-7 and a sealing gasket 1-8. The signal lamp mounting body 1-1 is vertically mounted in the longitudinal drain pipe 2 through a threaded fastening connecting piece, a sealing gasket 1-8 is mounted at the contact position of the outer side of the longitudinal drain pipe 2 and the signal lamp mounting body 1-1, and in order to guarantee the sealing effect and prevent water leakage, the shape of the inner side surface of the sealing gasket 1-8 is the same as that of the outer wall of the longitudinal drain pipe 2, so that the sealing gasket 1-8 is ensured to be attached to the longitudinal drain pipe 2 as far as possible. 3 signal lamps 1-7 are vertically and uniformly arranged on the signal lamp mounting body 1-1, the signal lamp 1-7 at the top end is close to the top of the inner wall of the longitudinal water drainage pipe 2 as far as possible, the signal lamp 1-7 at the bottom end is close to the bottom of the inner wall of the longitudinal water drainage pipe 2 as far as possible, the signal lamp 1-7 at the middle part is positioned at the center of the longitudinal water drainage pipe 2, the signal lamp 1-7 is electrically connected with the monitoring device 1-2, the signal lamp mounting body 1-1 and the threaded fastening connecting piece are of a hollow structure, and the fact that an electric wire of the signal lamp 1.
The sensor installation body 1-3 is installed in the longitudinal drain pipe 2 and separated from the signal lamp installation body 1-1 by a certain distance through the threaded fastening connecting piece, 3 optical sensors 1-4 are vertically and uniformly installed on the sensor installation body 1-3, the optical sensors 1-4 are electrically connected with the monitoring device 1-2, the sensor installation body 1-3 and the threaded fastening connecting piece are of a hollow structure, and therefore it is guaranteed that electric wires of the optical sensors 1-4 can penetrate out to be connected with the monitoring device 1-2. The installation positions of the signal lamps 1-7 correspond to the installation positions of the optical sensors 1-4, in order to prevent water flow from damaging the signal lamps 1-7 and the optical sensors 1-4, signal lamp protective covers 1-6 are installed on the outer sides of the signal lamps 1-7 on the signal lamp installation body 1-1, and sensor protective covers 1-5 are installed on the outer sides of the optical sensors 1-4 on the sensor installation body 1-3.
A plurality of groups of monitoring units 1 are arranged in the longitudinal drain pipe 2, when a certain section needs to be monitored, the section of control circuit controls 3 signal lamps to be on, and light signals sent by the 3 signal lamps are received by the corresponding 3 light sensors 1-4, and because the distance between each signal lamp and the bottom of the drain pipe is different, 3 different blockage conditions of the drain pipe can be described according to the condition that the 3 light sensors 1-4 receive the light signals. When the drainage pipe is completely blocked due to the accumulation blockage of construction wastes remained in the pipeline, optical signals sent by 3 signal lamps are completely blocked, 0 optical signal is received by the optical sensors 1-4, the control circuit prompts the upper computer that the section of the pipeline is completely blocked and basically loses drainage capacity through the communication circuit according to the signal fed back by the sensor circuit, corresponding treatment measures are adopted to clear the blockage in the pipeline, and meanwhile, the alarm circuit sends an alarm signal; when the tunnel drain pipe is seriously blocked but not completely blocked, the optical sensor 1-4 receives 1 optical signal, the control circuit sends a signal to the upper computer to prompt that the section of the pipe is seriously blocked but not completely blocked, and whether the treatment is needed or not can be considered according to the actual drainage condition; when the tunnel drain pipe is lightly blocked or the drainage condition is good, the optical sensors 1-4 receive 2-3 optical signals, and the control circuit sends a signal to the upper computer to prompt that the section of the pipeline is lightly blocked or the drainage condition is good, so that the blockage does not need to be cleaned.
In fig. 5, the monitoring device 1-2 of the present invention includes: a control circuit for controlling the operation of the whole device;
the output end of the sensor circuit is connected with the input end of the control circuit;
the signal conversion circuit is connected with the control circuit;
the input end of the communication circuit is connected with the output end of the control circuit;
the input end of the signal lamp circuit is connected with the output end of the control circuit;
and the input end of the alarm circuit is connected with the output end of the control circuit.
In fig. 6, the control circuit is formed by connecting an integrated circuit U1, a resistor P1, a resistor R1, capacitors C1-C3, a crystal oscillator Y1 and a switch S1, wherein the model of the integrated circuit U is AT89C51, and the model of the resistor P1 is Header 9. One end of a 19 pin of an integrated circuit U1 is connected with one end of a crystal oscillator Y1 and one end of a capacitor C1, the other end of a 18 pin of the integrated circuit U1 is connected with one end of a crystal oscillator Y1 and one end of a capacitor C2, a 9 pin of the integrated circuit U1 is connected with the negative electrode of a capacitor C3 and is connected with the ground through a resistor R1, a 10 pin and 11 pin of a communication circuit, one end of a 10 pin of a switch S1 and a sensor circuit, a 17 pin of an alarm circuit, a 20 pin of the integrated circuit U1 is connected with the ground, a 40 pin of the integrated circuit U is connected with a power supply, pins 39 to 32 are respectively connected with pins 2 to 9 of a resistor P1, a 1 pin to 8 pin of a signal conversion circuit, a 1 pin of a resistor P1 is connected with the power supply, pins 5 to 7 of the signal.
The signal conversion circuit is composed of an integrated circuit P6, and the model of the integrated circuit P6 is ADC 0804. Pins 6, 8, 10, 12, 14, 16, 18 and 20 of the integrated circuit P6 are respectively connected with pins 1 to 8 of the integrated circuit U1, pins 11, 13, 15 and 19 of the integrated circuit P6 are grounded, and pins 2 and 9 of the integrated circuit P6 are connected with a power supply.
The signal lamp circuit is formed by connecting a diode D1 to a diode D3 and a resistor R2 to a resistor R4. The anode of the diode D1 is connected with the pin 5 of the resistor P1, and the cathode is grounded through a resistor R2; the anode of the diode D2 is connected with the pin 6 of the resistor P1, and the cathode is grounded through a resistor R3; the anode of the diode D3 is connected with the pin 7 of the resistor P1, and the cathode is connected with the ground through the resistor R4.
The sensor circuit is formed by connecting the photosensor P2 to the photosensor P4. The pin 1 of the light sensor P2 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the pin 1 of the light sensor P3 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the 1 pin of the light sensor P4 is connected with the 16 pin, the 2 pin is connected with the power supply and the 3 pin is connected with the ground of the integrated circuit U1.
The alarm circuit consists of a buzzer P5, wherein a pin 1 of the buzzer P5 is connected with a pin 17, a pin 2 of the integrated circuit U1 is connected with a power supply, and a pin 3 is grounded. The control circuit gives corresponding indication to the alarm circuit according to the signal fed back by the sensor circuit, and the buzzer P5 of the alarm circuit gives an audible alarm. The communication circuit is composed of a connector P7, a pin P7 is connected with a pin 10 of the integrated circuit U1 at a pin 2, a pin U1 is connected with a pin 11 of the integrated circuit U1 at a pin 4, and a pin 1 is grounded. The communication circuit realizes the communication between the control circuit and an upper computer, and the upper computer can be a computer or a mobile phone.
Claims (9)
1. The utility model provides a tunnel drainage pipe blocks up monitored control system which characterized in that: the drainage pipe system is formed by connecting longitudinal drainage pipes (2) and transverse drainage pipes (3), and a plurality of groups of monitoring units (1) are arranged in the longitudinal drainage pipes (2) between the adjacent transverse drainage pipes (3);
the monitoring unit (1) is as follows: the signal lamp installation body (1-1) is vertically arranged in the longitudinal water drainage pipe (2), 3 signal lamps (1-7) are vertically and uniformly distributed on the signal lamp installation body (1-1), the sensor installation body (1-3) is arranged in the longitudinal water drainage pipe (2) and separated from the signal lamp installation body (1-1) by a certain distance, 3 optical sensors (1-4) are vertically and uniformly distributed on the sensor installation body (1-3), and the signal lamps (1-7) correspond to the optical sensors (1-4) and are electrically connected with the monitoring device (1-2).
2. The system for monitoring blockage of a tunnel drainage pipeline according to claim 1, wherein: and a signal lamp protective cover (1-6) is arranged on the outer side of the signal lamp (1-7) on the signal lamp mounting body (1-1).
3. The system for monitoring blockage of a tunnel drainage pipeline according to claim 1, wherein: the sensor mounting body (1-3) is provided with a sensor protective cover (1-5) outside the optical sensor (1-4).
4. The system for monitoring blockage of a tunnel drainage pipeline according to claim 1, wherein: and sealing gaskets (1-8) are arranged at the contact positions of the outer side of the longitudinal drain pipe (2) and the sensor mounting body (1-3) and the signal lamp mounting body (1-1).
5. The system for monitoring blockage of a tunnel drainage pipeline according to claim 1, wherein: the monitoring device (1-2) comprises: a control circuit for controlling the operation of the whole device;
the output end of the sensor circuit is connected with the input end of the control circuit;
the signal conversion circuit is connected with the control circuit;
the input end of the communication circuit is connected with the output end of the control circuit;
the input end of the signal lamp circuit is connected with the output end of the control circuit;
and the input end of the alarm circuit is connected with the output end of the control circuit.
6. The system according to claim 5, wherein the control circuit comprises: one end of a 19-pin crystal oscillator Y1 and one end of a capacitor C1 of an integrated circuit U1, the other end of a 18-pin crystal oscillator Y1 and one end of a capacitor C2, a 9-pin capacitor C3 is grounded through a resistor R1, a 10-pin communication circuit and an 11-pin communication circuit are connected, one end of a 10-pin switch S1 and a sensor circuit, a 17-pin alarm circuit, a 20-pin ground, a 40-pin power supply, and pins 39-32 are respectively connected with pins 2-9 and pins 1-8 of an exclusion P1, a 1-pin power supply and pins 5-7 of the exclusion P1 are connected with a signal lamp circuit, the other end of the switch S1 is connected with the power supply, the anode of the capacitor C3 is connected with the power supply, and the other ends of the capacitor C1 and the capacitor C2 are grounded; the integrated circuit U has a model number AT89C51 and a model number Header9 excluding P1.
7. The system for monitoring blockage of a tunnel drainage pipeline according to claim 5, wherein the signal conversion circuit comprises: pins 6, 8, 10, 12, 14, 16, 18 and 20 of the integrated circuit P6 are respectively connected with pins 1 to 8 of the integrated circuit U1, pins 11, 13, 15 and 19 of the integrated circuit P6 are grounded, and pins 2 and 9 of the integrated circuit P6 are connected with a power supply; the integrated circuit P6 is model ADC 0804.
8. The system for monitoring blockage of a tunnel drainage pipeline according to claim 5, wherein the signal lamp circuit comprises: the anode of the diode D1 is connected with the pin 5 of the resistor P1, and the cathode is grounded through a resistor R2; the anode of the diode D2 is connected with the pin 6 of the resistor P1, and the cathode is grounded through a resistor R3; the anode of the diode D3 is connected with the pin 7 of the resistor P1, and the cathode is connected with the ground through the resistor R4.
9. The system according to claim 5, wherein the sensor circuit comprises: the pin 1 of the light sensor P2 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the pin 1 of the light sensor P3 is connected with the pin 16, the pin 2 is connected with the power supply and the pin 3 is connected with the ground of the integrated circuit U1; the 1 pin of the light sensor P4 is connected with the 16 pin, the 2 pin is connected with the power supply and the 3 pin is connected with the ground of the integrated circuit U1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022463976.6U CN213574217U (en) | 2020-10-30 | 2020-10-30 | Tunnel drainage pipe blockage monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022463976.6U CN213574217U (en) | 2020-10-30 | 2020-10-30 | Tunnel drainage pipe blockage monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN213574217U true CN213574217U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022463976.6U Expired - Fee Related CN213574217U (en) | 2020-10-30 | 2020-10-30 | Tunnel drainage pipe blockage monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127946A (en) * | 2020-10-30 | 2020-12-25 | 文山州广那高速公路投资建设开发有限公司 | Tunnel drainage pipe blockage monitoring system |
| CN113339062A (en) * | 2021-07-22 | 2021-09-03 | 重庆国翔新材料有限公司 | Tunnel drain pipe anti-clogging device based on thing networking |
-
2020
- 2020-10-30 CN CN202022463976.6U patent/CN213574217U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127946A (en) * | 2020-10-30 | 2020-12-25 | 文山州广那高速公路投资建设开发有限公司 | Tunnel drainage pipe blockage monitoring system |
| CN113339062A (en) * | 2021-07-22 | 2021-09-03 | 重庆国翔新材料有限公司 | Tunnel drain pipe anti-clogging device based on thing networking |
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Granted publication date: 20210629 Termination date: 20211030 |
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