A device and method for testing the seepage prevention performance of an integrated utility tunnel under a river.

Abstract

This invention discloses a test device and method for the seepage prevention performance of an integrated utility tunnel under a river, belonging to the field of integrated utility tunnel engineering testing technology. It includes a shell structure, inside which a test mechanism is installed. The test mechanism is used to support the test block. The test mechanism is fixedly connected inside the shell structure and is used for unified control. A sealing mechanism is installed inside the shell structure. This invention sets up a drive mechanism, a supply mechanism, and a sealing mechanism. The drive mechanism's servo motor drives a turntable to rotate, which in turn moves the piston rod and piston plate via a guide rod and balance plate, simultaneously providing power for the water and gas supply to the supply mechanism. The gas supply pipe of the supply mechanism promptly delivers gas to the sealing mechanism, causing the expansion bladder to inflate synchronously and achieve sealing. Water is supplied to the surface of the test block through a water supply pipe, a water circulation pipe, and a pressure testing pipe, forming a linkage system of drive, supply, and sealing.

Description

Technical Field

[0001] This invention relates to the field of integrated utility tunnel engineering testing technology, and in particular to a device and method for testing the seepage prevention performance of integrated utility tunnels crossing rivers. Background Technology

[0002] As a centralized carrier for urban underground pipelines, integrated utility tunnels undertake the transmission functions of important pipelines such as electricity, communication, water supply and drainage, and gas. The quality of their engineering directly affects the safe and stable operation of urban infrastructure. In integrated utility tunnel projects that cross rivers, due to the long-term underwater high humidity and high osmotic pressure environment, and the influence of multiple factors such as river water scouring and pressure from the tunnel's burial depth, seepage prevention performance has become one of the core quality indicators of the utility tunnel project. Once leakage occurs in the utility tunnel, it will not only lead to corrosion and functional failure of the pipelines inside the tunnel, but may also cause serious consequences such as structural damage to the utility tunnel and pollution of the river. Therefore, after the completion of the utility tunnel construction or before it is put into use, its seepage prevention performance must be comprehensively and accurately tested.

[0003] Existing testing equipment often uses separate sealing and pressurization structures. However, due to the lack of an effective linkage drive structure, if water enters the equipment without an effective synchronous sealing structure, water leakage can easily occur due to poor sealing, affecting the normal testing of the test blocks. Furthermore, the lack of an effective emergency pressure relief structure can easily lead to damage to the sealing structure itself due to over-sealing. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art that easily lead to water seepage due to poor sealing, affecting the normal testing of test blocks, and that the lack of an effective emergency pressure relief structure can easily cause damage to the sealing structure itself due to excessive sealing. Therefore, this invention proposes a test device and method for the seepage prevention performance of integrated pipe gallery under river channels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A test device for the seepage prevention performance of an integrated utility tunnel under a river channel includes a shell structure. A test mechanism is installed inside the shell structure to support a test block. The test mechanism is fixedly connected inside the shell structure for unified control. A sealing mechanism is installed inside the shell structure to limit the test mechanism. A drive mechanism is fixedly connected to the right side of the shell structure. A supply mechanism is installed inside the drive mechanism for supplying air and water, and the drive mechanism drives the supply mechanism to operate.

[0007] Preferably, the housing mechanism includes support pads, a door, a control panel, and a test block. There are four support pads, which are fixedly installed at the four corners of the bottom surface of the housing mechanism. There are two door panels, which are symmetrically installed on the left and right sides of the front end of the housing mechanism. The control panel is fixedly installed at the front end of the door. The test block is located inside the test mechanism.

[0008] Preferably, the test mechanism includes a connecting rod, a limiting nut, an upper pressure plate, and an observation slot. The body of the test mechanism is a groove for placing the test block. The connecting rod is a lead screw structure. There are four connecting rods, which are respectively fixed at the four corners of the top surface of the housing mechanism. The limiting nut is screwed onto the outer wall of the connecting rod.

[0009] Preferably, the upper pressure plate has through holes at all four corners for fitting onto the outer wall of the connecting rod. The limiting nut is used to limit the upper pressure plate. The rectangular array of observation slots is formed inside the upper pressure plate. The position and number of the observation slots are matched with the test mechanism.

[0010] Preferably, the testing mechanism includes a barometer, a water pressure gauge, a water supply pipe, a water circulation pipe, a test pipe, a pressure sensor, and a seepage hole. The main body of the testing mechanism is a controller and is electrically connected to the control panel. The barometer and the water pressure gauge are fixedly installed at the front end of the testing mechanism.

[0011] Preferably, the water supply pipe is fixedly installed at the top of the testing mechanism, the water circulation pipe is fixedly installed inside the housing mechanism and connected to the water supply pipe, the linear array of test tubes is fixedly installed at the top of the water circulation pipe and passes upward through the housing mechanism to be located inside the testing mechanism, the top of the test tube has a groove, and a pressure sensor is fixedly connected inside the groove. The pressure sensor is used to detect the impact pressure supplied by the test tube to the test block, and the seepage hole is opened at the top of the test tube.

[0012] Preferably, the sealing mechanism includes a manifold, a branch pipe, an air supply hose, an expansion bladder, a pressure relief pipe, and a pressure relief valve. The main body of the sealing mechanism is the air supply pipe. The sealing mechanism is fixedly installed inside the testing mechanism. The manifold and branch pipe are both fixedly installed inside the housing mechanism. One end of the manifold is connected to the sealing mechanism, and the other end is connected to the branch pipe. One end of the air supply hose is connected to the branch pipe, and the other end passes upward through the housing mechanism and is located inside the testing mechanism. The expansion bladders are fixedly arranged in a linear array on the inner wall of the testing mechanism and connected to the expansion bladders. The pressure relief pipe is fixedly installed on the outer wall of the manifold, and the pressure relief valve is fixedly installed inside the manifold.

[0013] Preferably, the drive mechanism includes a cover plate, a mounting base, a servo motor, a turntable component, a guide rod, a balance plate, a piston rod, and a piston plate. The cover plate is hinged to the top of the drive mechanism. The mounting base is fixedly disposed within the drive mechanism. The servo motor is fixedly disposed at the bottom of the mounting base. The turntable component is fixedly disposed at the output end of the servo motor. One end of the guide rod is eccentrically disposed at the top of the turntable component, and the other end of the guide rod is connected to the balance plate. There are two piston rods, which are symmetrically fixedly disposed at one end of the balance plate. The piston plate is fixedly disposed at one end of the piston rod.

[0014] Preferably, the supply mechanism includes a water supply check valve, a liquid extraction pipe, a liquid extraction check valve, a gas supply pipe, a gas supply check valve, a gas extraction connection pipe, and a gas extraction check valve. The supply mechanism is used to supply water and is connected to the water supply connection pipe. The liquid extraction pipe is used to connect to an external water pump and is in communication with the supply mechanism. The water supply check valve is fixedly installed inside the supply mechanism. The liquid extraction check valve is fixedly installed on the outer wall of the liquid extraction pipe. The gas supply pipe is fixedly installed inside the drive mechanism. The gas supply check valve is fixedly installed on the outer wall of the gas supply pipe and is connected to the sealing mechanism. The gas extraction connection pipe is fixedly installed on the outer wall of the gas supply pipe, and the gas extraction check valve is fixedly installed inside the gas extraction connection pipe.

[0015] This invention discloses a method for testing the seepage prevention performance of an integrated utility tunnel under a river, comprising the following steps:

[0016] S1. Open the front door of the housing mechanism and place the test block to be tested in the groove of the test mechanism, so that the test block is centered; then put the upper pressure plate through the four corner through holes onto the outer wall of the connecting rod, press it to fit the top of the test block, rotate the limit nut to tighten the upper pressure plate, and complete the limit fixation of the test block. During the test, the status of the test block can be observed through the observation groove on the upper pressure plate.

[0017] S2. Close the chamber door and start the device through the control panel at the front of the chamber door. The controller of the test mechanism is powered on and the servo motor in the drive mechanism runs under the support of the mounting base, which drives the turntable to rotate. The guide rod pulls the balance plate to make reciprocating linear motion, and the piston rod and piston plate make reciprocating push and pull actions inside the supply mechanism.

[0018] S3. During the water supply phase, the piston plate is pulled backward to create negative pressure. External water enters the supply mechanism through the suction pipe, flows through the water supply check valve to the water supply pipe of the testing mechanism, and is then distributed to each test pipe through the water circulation pipe. The water is then evenly sprayed onto the surface of the test block through the seepage hole at the top of the test pipe.

[0019] S4. During the gas supply and sealing stage, when the piston plate is pushed forward, the gas enters the gas supply pipe through the gas extraction pipe, is delivered to the manifold of the sealing mechanism through the gas supply check valve, and is then delivered to the expansion bladder through the branch pipe and the gas supply hose, so that the expansion bladder is inflated and fits against the side of the test block to achieve sealing.

[0020] S5. During the test, the pressure sensor in the groove at the top of the test tube monitors the water supply pressure in real time and transmits the signal to the controller of the test mechanism. The controller displays the water pressure data on the control screen, and the air pressure gauge displays the sealing air pressure simultaneously. The water pressure gauge provides feedback on the water pressure status. If the air pressure in the manifold exceeds the safe value, the pressure relief valve opens automatically and releases excess gas through the pressure relief pipe.

[0021] S6. If the test pressure needs to be adjusted, input the command through the control panel. The controller adjusts the servo motor speed, changes the piston plate movement frequency, and thus adjusts the water and air supply pressure. The liquid suction check valve on the outer wall of the liquid suction pipe and the air suction check valve in the air suction pipe prevent water and gas backflow, respectively.

[0022] S7. After the test is completed, close the device through the control panel, the servo motor will stop running, and the pressure relief valve will continue to release pressure until the expansion bladder contracts; open the chamber door, loosen the limit nut, remove the upper pressure plate, take out the test piece, and complete the test process.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. In this invention, by setting up components such as a driving mechanism, a supply mechanism, and a sealing mechanism, the servo motor of the driving mechanism drives the turntable to rotate, which in turn moves the piston rod and piston plate through the guide linkage and balance plate, simultaneously providing power for the water and gas supply of the supply mechanism. The gas supply pipe of the supply mechanism delivers gas to the sealing mechanism in a timely manner, so that the expansion bladder is synchronously inflated to achieve sealing. The water supply is delivered to the surface of the test block through the water supply pipe, the water circulation pipe, and the pressure test pipe, forming a linkage system of driving, supply, and sealing. This device can completely solve the problem of poor sealing caused by the asynchronous sealing and water supply in the prior art, avoid water seepage interfering with the test block test, and ensure the continuity and accuracy of the test process.

[0025] 2. In this invention, by setting up components such as a manifold, a pressure relief pipe, and a pressure relief valve for the sealing mechanism, the gas is collected through the manifold and supplied to the expansion airbag through the diversion pipe and the gas supply hose. At the same time, the pressure relief valve monitors the gas pressure in the manifold in real time. When the gas pressure exceeds the safety threshold, the pressure relief pipe is automatically opened to release the excess gas, forming a closed-loop protection structure of "gas supply - monitoring - pressure relief". This device can effectively avoid damage to the sealing structure such as the expansion airbag caused by excessive sealing, extend the service life of the sealing mechanism, and ensure the stability of the sealing effect. It solves the technical shortcoming of existing devices that lack an emergency pressure relief structure.

[0026] 3. In this invention, by setting up a pressure sensor, controller, and control panel in the testing mechanism, along with components such as the connecting rod, limit nut, and upper pressure plate of the testing mechanism, the pressure sensor captures the water supply pressure data of the test tube in real time and transmits it to the controller. The controller receives feedback from the control panel and drives the mechanism to adjust the supply pressure. At the same time, the upper pressure plate, under the action of the connecting rod and limit nut, firmly presses the test block, forming a collaborative testing mechanism of pressure monitoring, real-time control, and test block fixation. This device can accurately control the test water pressure parameters, ensuring that the test block completes the seepage prevention performance test under stable stress, greatly improving the reliability and accuracy of the test results, and meeting the stringent requirements of the integrated pipe gallery under the river for seepage prevention testing. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front view of the disassembled structure of the test device and method for the seepage prevention performance of an integrated utility tunnel under a river proposed in this invention.

[0028] Figure 2 This is a schematic diagram of the shell mechanism and support pad combination structure of the seepage prevention performance testing device and method for an integrated utility tunnel under a river proposed in this invention.

[0029] Figure 3 This is a schematic diagram of the combined structure of the testing mechanism and the barometer of the integrated utility tunnel under a river, which is proposed in this invention for testing the seepage prevention performance of the integrated utility tunnel.

[0030] Figure 4 This is a schematic diagram of the shell mechanism and support pad combination structure of the seepage prevention performance testing device and method for an integrated utility tunnel under a river proposed in this invention.

[0031] Figure 5 This is a schematic diagram of the front view of the disassembled structure of the test device and method for the seepage prevention performance of an integrated utility tunnel under a river proposed in this invention.

[0032] Figure 6 This is a cross-sectional top view of the seepage prevention performance testing device and method for an integrated utility tunnel under a river proposed in this invention.

[0033] Figure 7 This invention provides a device and method for testing the seepage prevention performance of an integrated utility tunnel under a river. Figure 2 Enlarged structural diagram at point A in the middle;

[0034] Figure 8 This invention provides a device and method for testing the seepage prevention performance of an integrated utility tunnel under a river. Figure 2 Enlarged structural diagram at point B.

[0035] In the diagram: 1. Shell structure; 101. Support pad; 1011. Box door; 1012. Control panel; 1013. Test block; 2. Test mechanism; 201. Connecting rod; 2011. Limit nut; 2012. Upper pressure plate; 2013. Observation slot; 3. Testing mechanism; 301. Air pressure gauge; 3011. Water pressure gauge; 3012. Water supply pipe; 3013. Water circulation pipe; 3014. Test pipe; 3015. Pressure sensor; 3016. Leakage hole; 4. Sealing mechanism; 401. Manifold; 4011. Diverter; 4012. Supply... 4013. Air hose; 4014. Inflatable air bladder; 4015. Pressure relief pipe; 4016. Pressure relief valve; 5. Drive mechanism; 501. Cover plate; 5011. Mounting base; 5012. Servo motor; 5013. Turntable component; 5014. Guide connecting rod; 5015. Balance plate; 5016. Piston rod; 5017. Piston plate; 6. Supply mechanism; 601. Water supply check valve; 6011. Liquid extraction pipe; 6012. Liquid extraction check valve; 6013. Gas supply pipe; 6014. Gas supply check valve; 6015. Gas extraction pipe; 6016. Gas extraction check valve. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Example, refer to Figure 1 - Figure 8 A test device for the seepage prevention performance of an integrated utility tunnel under a river is disclosed, comprising a shell structure 1, a test mechanism 2 installed inside the shell structure 1 for supporting test blocks, a test mechanism 3 fixedly connected inside the shell structure 1 for unified control, a sealing mechanism 4 installed inside the shell structure 1 for limiting the test mechanism 2, a drive mechanism 5 fixedly connected to the right side of the shell structure 1, a supply mechanism 6 installed inside the drive mechanism 5 for supplying air and water, and the drive mechanism 5 for driving the supply mechanism 6. By adopting the above technical solution, a comprehensive test of the seepage prevention performance of the integrated utility tunnel test block under a river is realized. The drive mechanism 5 can drive the supply mechanism 6 to complete the supply of air and water, meeting the medium supply required for the test.

[0038] Furthermore, the housing mechanism 1 includes support pads 101, a door 1011, a control panel 1012, and a test block 1013. There are four support pads 101, which are fixedly installed at the four corners of the bottom surface of the housing mechanism 1. There are two doors 1011, which are symmetrically arranged on the left and right sides of the front end of the housing mechanism 1. The control panel 1012 is fixedly installed at the front end of the door 1011. The test block 1013 is located inside the test mechanism 2. By adopting the above technical solution, the device is stably supported, conveniently operated and controlled, and the test block is placed and supported, which facilitates the operator to perform test-related operations.

[0039] Furthermore, the test mechanism 2 includes a connecting rod 201, a limiting nut 2011, an upper pressure plate 2012, and an observation slot 2013. The body of the test mechanism 2 is a groove for placing the test block 1013. The connecting rod 201 is a screw rod structure, and there are four connecting rods 201. The four connecting rods 201 are respectively fixed at the four corners of the top surface of the shell mechanism 1. The limiting nut 2011 is screwed onto the outer wall of the connecting rod 201. By adopting the above technical solution, the initial limiting and fixing of the test block in the test mechanism 2 is achieved, providing a stable placement foundation for the test block's impermeability performance test.

[0040] Furthermore, through holes are provided at the four corners of the upper pressure plate 2012. These through holes are used to fit onto the outer wall of the connecting rod 201. The limiting nut 2011 is used to limit the upper pressure plate 2012. The rectangular array of observation slots 2013 is opened inside the upper pressure plate 2012. The opening position and number of observation slots 2013 are matched with the test mechanism 2. By adopting the above technical solution, the installation and limiting of the upper pressure plate 2012 on the connecting rod 201 and the observation of the test block testing process are realized. At the same time, the limiting nut 2011 ensures the stability of the test block during testing.

[0041] Furthermore, the testing mechanism 3 includes a barometer 301, a water pressure gauge 3011, a water supply pipe 3012, a water circulation pipe 3013, a pressure testing pipe 3014, a pressure sensor 3015, and a seepage hole 3016. The main body of the testing mechanism 3 is a controller and is electrically connected to the control panel 1012. The barometer 301 is fixedly installed at the front end of the testing mechanism 3, and the water pressure gauge 3011 is fixedly installed at the front end of the testing mechanism 3. By adopting the above technical solution, real-time monitoring of air pressure and water pressure during the testing process and unified control of the testing system are realized, and the electrical connection between the controller and the control panel 1012 facilitates operation.

[0042] Furthermore, the water supply pipe 3012 is fixedly installed at the top of the testing mechanism 3, the water circulation pipe 3013 is fixedly installed inside the housing mechanism 1 and connected to the water supply pipe 3012, and the pressure test pipe 3014 is fixedly installed in a linear array at the top of the water circulation pipe 3013 and passes upward through the housing mechanism 1 to be located inside the testing mechanism 2. The top of the pressure test pipe 3014 has a groove, and a pressure sensor 3015 is fixedly connected inside the groove. The pressure sensor 3015 is used to detect the water hammer pressure supplied by the pressure test pipe 3014 to the test block 1013. The seepage hole 3016 is opened at the top of the pressure test pipe 3014. By adopting the above technical solution, the water delivery, circulation supply and detection of the water supply pressure of the test block are realized. The seepage hole 3016 ensures that the water and the test block are in full contact to complete the seepage prevention test.

[0043] Furthermore, the sealing mechanism 4 includes a manifold 401, a branch pipe 4011, an air supply hose 4012, an expansion bladder 4013, a pressure relief pipe 4014, and a pressure relief valve 4015. The main body of the sealing mechanism 4 is the air supply pipe. The sealing mechanism 4 is fixedly installed inside the testing mechanism 3. Both the manifold 401 and the branch pipe 4011 are fixedly installed inside the housing mechanism 1. One end of the manifold 401 is connected to the sealing mechanism 4, and the other end is connected to the branch pipe 4011. One end of the air supply hose 4012 is connected to the branch pipe 4011, and the other end is connected to... The upper part passes through the housing mechanism 1 and is located inside the test mechanism 2. The linear array of inflatable airbags 4013 is fixedly installed on the inner wall of the test mechanism 2 and connected to the inflatable airbags 4013. The pressure relief pipe 4014 is fixedly installed on the outer wall of the manifold 401, and the pressure relief valve 4015 is fixedly installed inside the manifold 401. By adopting the above technical solution, the sealing limit of the test mechanism 2 is achieved. At the same time, the pressure relief pipe 4014 and the pressure relief valve 4015 can avoid damage to the sealing structure due to excessive sealing, thus solving the problems of poor sealing and easy damage to the sealing structure.

[0044] Furthermore, the drive mechanism 5 includes a cover plate 501, a mounting base 5011, a servo motor 5012, a turntable 5013, a guide rod 5014, a balance plate 5015, a piston rod 5016, and a piston plate 5017. The cover plate 501 is hinged to the top of the drive mechanism 5, the mounting base 5011 is fixedly disposed within the drive mechanism 5, the servo motor 5012 is fixedly disposed at the bottom of the mounting base 5011, and the turntable 5013 is fixedly disposed at the output of the servo motor 5012. One end of the guide rod 5014 is eccentrically set at the top of the turntable 5013, and the other end of the guide rod 5014 is connected to the balance plate 5015. There are two piston rods 5016, which are symmetrically fixed at one end of the balance plate 5015. The piston plate 5017 is fixedly set at one end of the piston rod 5016. By adopting the above technical solution, a stable driving force is provided for the supply mechanism 6, ensuring that the supply mechanism 6 can efficiently complete the gas and water supply operations.

[0045] Furthermore, the supply mechanism 6 includes a water supply check valve 601, a liquid extraction pipe 6011, a liquid extraction check valve 6012, a gas supply pipe 6013, a gas supply check valve 6014, a gas extraction pipe 6015, and a gas extraction check valve 6016. The supply mechanism 6 is used to supply water and is connected to the water supply pipe 6012. The liquid extraction pipe 6011 is used to connect to an external water pump and is connected to the supply mechanism 6. The water supply check valve 601 is fixedly installed inside the supply mechanism 6, and the liquid extraction check valve 6012 is fixedly installed inside the liquid extraction pipe 6015. The outer wall of pipe 6011, gas supply pipe 6013 is fixedly installed inside drive mechanism 5, gas supply check valve 6014 is fixedly installed on the outer wall of gas supply pipe 6013 and connected to sealing mechanism 4, gas extraction pipe 6015 is fixedly installed on the outer wall of gas supply pipe 6013, and gas extraction check valve 6016 is fixedly installed inside gas extraction pipe 6015. By adopting the above technical solution, unidirectional stable supply and extraction of water and gas are realized, avoiding the backflow of the medium from affecting the test, and ensuring the stability and reliability of gas and water supply.

[0046] This invention discloses a method for testing the seepage prevention performance of an integrated utility tunnel under a river, comprising the following steps:

[0047] S1. Open the box door 1011 at the front end of the housing mechanism 1, place the test block 1013 to be tested in the groove of the test mechanism 2, and center the test block 1013; then, put the upper pressure plate 2012 through the four corner through holes onto the outer wall of the connecting rod 201, press it to fit the top of the test block 1013, rotate the limiting nut 2011 to press the upper pressure plate 2012, and complete the limiting and fixing of the test block 1013. During the test, the status of the test block can be observed through the observation groove 2013 on the upper pressure plate 2012.

[0048] S2. Close the box door 1011, start the device through the control panel 1012 at the front of the box door 1011, power on the controller of the test mechanism 3, and drive the servo motor 5012 in the drive mechanism 5 to run under the support of the mounting base 5011, drive the turntable 5013 to rotate, and pull the balance plate 5015 to reciprocate linear motion through the guide rod 5014, and link the piston rod 5016 and piston plate 5017 to reciprocate push and pull actions inside the supply mechanism 6;

[0049] S3. During the water supply stage, the piston plate 5017 is pulled backward to create negative pressure. External water enters the supply mechanism 6 through the suction pipe 6011, flows through the water supply check valve 601 to the water supply pipe 3012 of the testing mechanism 3, and is then distributed to each test pipe 3014 through the water circulation pipe 3013. The water is then evenly sprayed onto the surface of the test block 1013 through the seepage hole 3016 at the top of the test pipe 3014.

[0050] S4. During the gas supply and sealing stage, when the piston plate 5017 is pushed forward, the gas enters the gas supply pipe 6013 through the gas extraction pipe 6015, and is delivered to the manifold 401 of the sealing mechanism 4 through the gas supply check valve 6014. Then, it is delivered to the expansion bladder 4013 through the branch pipe 4011 and the gas supply hose 4012, so that the expansion bladder 4013 is inflated and fits against the side of the test block 1013 to achieve sealing.

[0051] S5. During the test, the pressure sensor 3015 in the groove at the top of the pressure test tube 3014 monitors the water supply pressure in real time and transmits the signal to the controller of the test mechanism 3. The controller displays the water pressure data through the control panel 1012, the air pressure gauge 301 displays the sealing air pressure simultaneously, and the water pressure gauge 3011 provides feedback on the water pressure status. If the air pressure in the manifold 401 exceeds the safe value, the pressure relief valve 4015 automatically opens and releases the excess gas through the pressure relief pipe 4014.

[0052] S6. If the test pressure needs to be adjusted, input the command through the control panel 1012. The controller adjusts the speed of the servo motor 5012, changes the movement frequency of the piston plate 5017, and then adjusts the water supply and air supply pressure. The liquid extraction check valve 6012 on the outer wall of the liquid extraction pipe 6011 and the air extraction check valve 6016 in the air extraction pipe 6015 prevent water and gas from flowing back respectively.

[0053] S7. After the test is completed, the device is turned off through the control panel 1012, the servo motor 5012 stops running, the pressure relief valve 4015 continues to release pressure until the expansion air bag 4013 contracts; open the box door 1011, loosen the limit nut 2011, remove the upper pressure plate 2012, take out the test block 1013, and complete the test process.

[0054] In use, firstly, the operator opens the box doors 1011 on the left and right sides of the front end of the housing mechanism 1, and places the test block 1013 to be tested stably in the groove of the test mechanism 2, ensuring that the test block 1013 is centered and not excessively squeezed against the inner wall of the test mechanism 2. Then, the operator picks up the upper pressure plate 2012, aligns the through holes at its four corners with the connecting rods 201 at the four corners of the top surface of the housing mechanism 1, puts the upper pressure plate 2012 on the outer wall of the connecting rod 201 and presses it down to fit the top of the test block 1013. Then, the operator rotates the limiting nut 2011 on the outer wall of the connecting rod 201, so that the limiting nut 2011 moves down and presses the upper pressure plate 2012. The upper pressure plate 2012 forms a stable limit on the test block 1013. During the test, the surface condition and leakage of the test block 1013 can be directly observed through the observation groove 2013 on the upper pressure plate 2012.

[0055] After the box door 1011 is closed, the entire device is started through the control panel 1012 at the front of the box door 1011. The controller of the test mechanism 3 is simultaneously powered on and enters the working state. The servo motor 5012 in the drive mechanism 5 starts to run under the fixed support of the mounting base 5011. The output end of the servo motor 5012 drives the turntable 5013 at the top to rotate at a constant speed. Since one end of the guide rod 5014 is eccentrically connected to the top of the turntable 5013, when the turntable 5013 rotates, it will pull the balance plate 5015 to reciprocate linear motion through the guide rod 5014. The piston rods 5016, which are symmetrically fixed at both ends of the balance plate 5015, move synchronously, thereby driving the piston plate 5017 at one end of the piston rod 5016 to reciprocate push and pull inside the supply mechanism 6, providing continuous power for the water and gas supply operations of the supply mechanism 6.

[0056] In the water supply process, the suction pipe 6011 of the supply mechanism 6 is connected to the water pump of the external water source. When the piston plate 5017 is pulled backward, a negative pressure is created, and external water enters the supply mechanism 6 through the suction pipe 6011. The suction check valve 6012 on the outer wall of the suction pipe 6011 prevents water backflow. The water supply check valve 601 inside the supply mechanism 6 controls the water to flow unidirectionally to the water supply pipe 3012 of the test mechanism 3. The water enters the water circulation pipe 3013 through the water supply pipe 3012. The water circulation pipe 3013 evenly distributes the water to each test pipe 3014 at its top. The pressure tube 3014 extends upward into the test mechanism 2, and the seepage hole 3016 at its top sprays water evenly onto the surface of the test block 1013, ensuring that the test block 1013 is in full contact with the water. At the same time, the pressure sensor 3015 in the groove at the top of the pressure tube 3014 senses the pressure of the water on the test block 1013 in real time and transmits the pressure signal to the controller of the test mechanism 3. After processing the signal, the controller displays the real-time water pressure data through the control screen 1012. The water pressure gauge 3011 at the front of the test mechanism 3 synchronously feeds back the water pressure status, which is convenient for operators to monitor intuitively.

[0057] In the gas supply and sealing process, when the piston plate 5017 pushes forward, the gas supply pipe 6013 of the supply mechanism 6 draws in external gas through the extraction pipe 6015. The extraction check valve 6016 inside the extraction pipe 6015 ensures unidirectional gas entry. The gas is delivered to the sealing mechanism 4 through the gas supply pipe 6013. The gas supply check valve 6014 on the outer wall of the gas supply pipe 6013 prevents gas backflow. After entering the sealing mechanism 4, the gas is first collected by the manifold 401, and then distributed to each gas supply hose 4012 through the branch pipe 4011. Gas is delivered to the expansion bladder 4013 on the inner wall of the test mechanism 2. After inflation, the expansion bladder 4013 gradually expands and tightly fits the side of the test block 1013 to form an all-round sealing structure, preventing water from leaking from the side of the test block 1013 during the test. The pressure gauge 301 at the front end of the test mechanism 3 displays the sealing pressure in real time. If the pressure in the manifold 401 exceeds the preset safety value, the pressure relief pipe 4014 on the outer wall of the manifold 401 and the pressure relief valve 4015 inside will automatically start to release excess gas, ensuring that the expansion bladder 4013 will not be damaged due to excessive pressure.

[0058] During the test, the controller of the testing mechanism 3 automatically adjusts the speed of the servo motor 5012 based on the water pressure data fed back by the pressure sensor 3015, thereby adjusting the movement frequency of the piston plate 5017 to achieve precise control of the water supply pressure and air supply pressure, ensuring that the test parameters always meet the preset standards. If the test pressure needs to be adjusted, the operator can input a command through the control panel 1012. After receiving the command, the controller drives the servo motor 5012 to adjust its operating status and complete the adjustment of the pressure parameters. After the test is completed, the device is closed through the control panel 1012, the servo motor 5012 stops running, the pressure relief valve 4015 continues to release pressure until the expansion bladder 4013 contracts, then the chamber door 1011 is opened, the limit nut 2011 is loosened, the upper pressure plate 2012 is removed, and the test block 1013 is taken out, completing the entire seepage prevention performance test process.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A test device for the seepage prevention performance of an integrated utility tunnel under a river, comprising a shell mechanism (1), characterized in that, The shell mechanism (1) is equipped with a test mechanism (2) inside, which is used to carry the test block. The shell mechanism (1) is fixedly connected with a test mechanism (3) inside, which is used for unified control. The shell mechanism (1) is equipped with a sealing mechanism (4) inside, which is used to limit the test mechanism (2). The right side of the shell mechanism (1) is fixedly connected with a drive mechanism (5). The drive mechanism (5) is equipped with a supply mechanism (6) inside, which is used for supplying gas and water. The drive mechanism (5) is used to drive the supply mechanism (6) to work.

2. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The shell mechanism (1) includes a support pad (101), a door (1011), a control panel (1012), and a test block (1013). There are four support pads (101), which are fixedly installed at the four corners of the bottom surface of the shell mechanism (1). There are two doors (1011), which are symmetrically installed on the left and right sides of the front end of the shell mechanism (1). The control panel (1012) is fixedly installed at the front end of the door (1011). The test block (1013) is located inside the test mechanism (2).

3. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The test mechanism (2) includes a connecting rod (201), a limiting nut (2011), an upper pressure plate (2012), and an observation slot (2013). The body of the test mechanism (2) is a groove for placing the test block (1013). The connecting rod (201) is a screw structure. There are four connecting rods (201). The four connecting rods (201) are fixedly set at the four corners of the top surface of the housing mechanism (1). The limiting nut (2011) is screwed onto the outer wall of the connecting rod (201).

4. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 3, characterized in that, The upper pressure plate (2012) has through holes at its four corners. These through holes are used to fit onto the outer wall of the connecting rod (201). The limiting nut (2011) is used to limit the upper pressure plate (2012). The rectangular array of observation slots (2013) is opened inside the upper pressure plate (2012). The opening position and number of the observation slots (2013) are matched with the test mechanism (2).

5. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The testing mechanism (3) includes a barometer (301), a water pressure gauge (3011), a water supply pipe (3012), a water circulation pipe (3013), a pressure test pipe (3014), a pressure sensor (3015), and a seepage hole (3016). The main body of the testing mechanism (3) is a controller and is electrically connected to the control panel (1012). The barometer (301) is fixedly installed at the front end of the testing mechanism (3), and the water pressure gauge (3011) is fixedly installed at the front end of the testing mechanism (3).

6. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 5, characterized in that, The water supply pipe (3012) is fixedly installed at the top of the test mechanism (3). The water circulation pipe (3013) is fixedly installed inside the shell mechanism (1) and connected to the water supply pipe (3012). The test pressure pipe (3014) is fixedly installed in a linear array at the top of the water circulation pipe (3013) and passes through the shell mechanism (1) to be located inside the test mechanism (2). The top of the test pressure pipe (3014) has a groove, and a pressure sensor (3015) is fixedly connected inside the groove. The pressure sensor (3015) is used to detect the water hammer pressure supplied by the test pressure pipe (3014) to the test block (1013). The seepage hole (3016) is opened at the top of the test pressure pipe (3014).

7. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The sealing mechanism (4) includes a manifold (401), a branch pipe (4011), an air supply hose (4012), an expansion airbag (4013), a pressure relief pipe (4014), and a pressure relief valve (4015). The main body of the sealing mechanism (4) is the air supply pipe. The sealing mechanism (4) is fixedly installed inside the testing mechanism (3). The manifold (401) and the branch pipe (4011) are both fixedly installed inside the housing mechanism (1). One end of the manifold (401) is connected to the sealing mechanism (4), and the other end... One end is connected to the diverter pipe (4011), one end of the air supply hose (4012) is connected to the diverter pipe (4011), and the other end passes upward through the housing mechanism (1) and is located inside the test mechanism (2). The expansion airbags (4013) are fixedly arranged in a linear array on the inner wall of the test mechanism (2) and connected to the expansion airbags (4013). The pressure relief pipe (4014) is fixedly arranged on the outer wall of the manifold (401), and the pressure relief valve (4015) is fixedly arranged inside the manifold (401).

8. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The drive mechanism (5) includes a cover plate (501), a mounting base (5011), a servo motor (5012), a turntable (5013), a guide rod (5014), a balance plate (5015), a piston rod (5016), and a piston plate (5017). The cover plate (501) is hinged to the top of the drive mechanism (5), the mounting base (5011) is fixedly installed inside the drive mechanism (5), and the servo motor (5012) is fixedly installed at the bottom of the mounting base (5011). The turntable component (5013) is fixedly mounted on the output end of the servo motor (5012). One end of the guide rod (5014) is eccentrically mounted on the top of the turntable component (5013). The other end of the guide rod (5014) is connected to the balance plate (5015). There are two piston rods (5016). The two piston rods (5016) are symmetrically fixedly mounted on one end of the balance plate (5015). The piston plate (5017) is fixedly mounted on one end of the piston rod (5016).

9. The seepage prevention performance testing device for an integrated utility tunnel under a river as described in claim 1, characterized in that, The supply mechanism (6) includes a water supply check valve (601), a liquid extraction pipe (6011), a liquid extraction check valve (6012), a gas supply pipe (6013), a gas supply check valve (6014), a gas extraction pipe (6015), and a gas extraction check valve (6016). The supply mechanism (6) is used to supply water and is connected to the water supply pipe (3012). The liquid extraction pipe (6011) is used to connect to an external water pump and is connected to the supply mechanism (6). The water supply check valve (6011) is connected to the water supply pipe (6012). The liquid extraction check valve (6012) is fixedly installed in the supply mechanism (6), the liquid extraction check valve (6012) is fixedly installed on the outer wall of the liquid extraction pipe (6011), the gas supply pipe (6013) is fixedly installed in the drive mechanism (5), the gas supply check valve (6014) is fixedly installed on the outer wall of the gas supply pipe (6013) and connected to the sealing mechanism (4), the gas extraction pipe (6015) is fixedly installed on the outer wall of the gas supply pipe (5013), and the gas extraction check valve (6016) is fixedly installed in the gas extraction pipe (6015).

10. A method for testing the seepage prevention performance of an integrated utility tunnel under a river as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Open the box door (1011) at the front end of the shell mechanism (1), place the test block (1013) to be tested in the groove of the test mechanism (2), and center the test block (1013); then put the upper pressure plate (2012) through the four corner through holes onto the outer wall of the connecting rod (201), press it to fit the top of the test block (1013), rotate the limit nut (2011) to press the upper pressure plate (2012), and complete the limit fixation of the test block (1013). During the test, the test block status can be observed through the observation groove (2013) on the upper pressure plate (2012); S2. Close the box door (1011). Start the device through the control panel (1012) at the front of the box door (1011). The controller of the test mechanism (3) is powered on and the servo motor (5012) in the drive mechanism (5) runs under the support of the mounting base (5011), driving the turntable (5013) to rotate. The guide rod (5014) pulls the balance plate (5015) to make reciprocating linear motion. The piston rod (5016) and piston plate (5017) are linked to make reciprocating push and pull actions inside the supply mechanism (6). S3. During the water supply stage, the piston plate (5017) is pulled backward to create negative pressure. External water enters the supply mechanism (6) through the suction pipe (6011), flows through the water supply check valve (601) to the water supply pipe (3012) of the test mechanism (3), and is then distributed to each test pipe (3014) through the water circulation pipe (3013). The water is then evenly sprayed onto the surface of the test block (1013) through the seepage hole (3016) at the top of the test pipe (3014). S4. During the gas supply and sealing stage, when the piston plate (5017) is pushed forward, the gas enters the gas supply pipe (6013) through the gas extraction pipe (6015), and is delivered to the manifold (401) of the sealing mechanism (4) through the gas supply check valve (6014). Then, it is delivered to the expansion bladder (4013) through the branch pipe (4011) and the gas supply hose (4012), so that the expansion bladder (4013) is inflated and fits against the side of the test block (1013) to achieve sealing. S5. During the test, the pressure sensor (3015) in the groove at the top of the test tube (3014) detects the water supply pressure in real time and transmits the signal to the controller of the test mechanism (3). The controller displays the water pressure data through the control panel (1012), the air pressure gauge (301) displays the sealing air pressure in sync, and the water pressure gauge (3011) provides feedback on the water pressure status. If the air pressure in the manifold (401) exceeds the safe value, the pressure relief valve (4015) opens automatically and releases excess gas through the pressure relief pipe (4014). S6. If the test pressure needs to be adjusted, input the command through the control panel (1012), the controller adjusts the speed of the servo motor (5012), changes the movement frequency of the piston plate (5017), and then adjusts the water supply and air supply pressure. The liquid suction check valve (6012) on the outer wall of the liquid suction pipe (6011) and the air suction check valve (6016) in the air suction pipe (6015) prevent water and gas from flowing back respectively. S7. After the test is completed, close the device through the control panel (1012), the servo motor (5012) stops running, the pressure relief valve (4015) continues to release pressure until the expansion airbag (4013) contracts; open the box door (1011), loosen the limit nut (2011), remove the upper pressure plate (2012), take out the test block (1013), and complete the test process.

Images