Tunnel detection knocking device and control loop thereof

Abstract

The utility model relates to a tunnel detection knocking device and a control loop thereof, the knocking device comprises a knocking mechanism, the knocking mechanism comprises a knocking hammer and a first driving assembly, the first driving assembly is connected with the knocking hammer, and the first driving assembly is used for driving the knocking hammer to reciprocate; the lifting mechanism comprises a sliding stand column and a second driving assembly, one end of the sliding stand column is connected with the knocking mechanism, the other end of the sliding stand column is connected with the second driving assembly, and the second driving assembly is used for driving the sliding stand column to do lifting motion. The knocking device provided by the embodiment of the utility model can be used for automatically knocking and detecting the top of the tunnel, is simple in structure and convenient to assemble, and realizes the light weight of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel detection, in particular to a tunnel detection knocking device and its control circuit. Background Technique

[0002] A tunnel is a building constructed underground, underwater or in a mountain body, for laying railways or building roads for motor vehicles to pass through. It is a form of human utilization of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels and military tunnels.

[0003] After the completion of tunnel construction or during daily maintenance, it is necessary to knock and detect the tunnel dome to discover bad phenomena such as hollowing in the tunnel lining, so as to ensure the safe use of the tunnel. In the early stage, manual detection was used for tunnel detection, which had problems such as low efficiency, poor accuracy of detection results, and high manual labor intensity. The currently used automatic detection knocking equipment also has disadvantages such as complex structure, high assembly difficulty, and large weight.

[0004] Therefore, there is an urgent need to provide a tunnel detection knocking device to realize the automatic knocking detection of the tunnel, and it has a simple structure and is convenient for assembly. Content of the Utility Model

[0005] The technical problem solved by the utility model is to provide a tunnel detection knocking device and its control circuit, which can realize automatic knocking detection, improve the detection efficiency and the accuracy of the results. At the same time, the device has a simple structure, realizes the lightweight of the device, and is convenient for assembly and use.

[0006] To solve the above technical problems, an embodiment of the utility model provides a tunnel detection knocking device, including: a knocking mechanism, the knocking mechanism includes a knocking hammer and a first driving component, the first driving component is connected to the knocking hammer, and the first driving component is used to drive the knocking hammer to make reciprocating motion; a lifting mechanism, the lifting mechanism includes a sliding column and a second driving component, one end of the sliding column is connected to the knocking mechanism, the other end of the sliding column is connected to the second driving component, and the second driving component is used to drive the sliding column to make lifting motion.

[0007] Optionally, the knocking mechanism further includes a guiding component, the guiding component includes guiding wheels, the guiding wheels are symmetrically arranged on both sides of the knocking hammer, and the knocking hammer passes through the middle of the guiding wheels.

[0008] Optionally, the knocking mechanism further includes a housing, and the housing covers the outside of the knocking hammer and the first driving component.

[0009] Optionally, the guiding component further includes a fixing member, the guiding wheels are installed on the fixing member, and the fixing member is connected to the top of the housing.

[0010] Optionally, the knocking mechanism further includes a shock pad disposed at the bottom of the first driving assembly.

[0011] Optionally, the lifting mechanism further includes a slide rail and a sliding member connected to the sliding column, and the sliding member is used to drive the sliding column to slide along the slide rail.

[0012] Optionally, the sliding member includes a pulley or a slider.

[0013] Optionally, the lifting mechanism further includes a fixed frame, the slide rail is installed on the fixed frame, and the sliding column moves up and down along the slide rail within the fixed frame.

[0014] Optionally, it further includes a swing mechanism, one end of the lifting mechanism is connected to the knocking mechanism, and the other end of the lifting mechanism is connected to the swing mechanism.

[0015] Optionally, the swing mechanism includes a first swing assembly and a support frame, and the first swing assembly is rotatably connected to the support frame.

[0016] Optionally, the first swing assembly is hinged to the support frame.

[0017] Optionally, the swing mechanism further includes a third driving assembly connected to one side of the first swing assembly, and the third driving assembly is used to drive the first swing assembly to swing.

[0018] Optionally, it further includes a control module electrically connected to the first driving assembly, the second driving assembly, and the third driving assembly.

[0019] Optionally, the first driving assembly includes a first cylinder and a first solenoid valve, and the first solenoid valve is electrically connected to the control module.

[0020] Optionally, the second driving assembly includes a second cylinder and a second solenoid valve, and the second solenoid valve is electrically connected to the control module.

[0021] Optionally, it further includes a cavity detection module, which includes a sound collector and an analysis processor. The sound collector is used to collect the knocking sound of the knocking hammer, and the analysis processor is electrically connected to the sound collector and the control module.

[0022] Optionally, it further includes a marking mechanism disposed on the knocking mechanism and electrically connected to the control module.

[0023] Correspondingly, an embodiment of the present utility model further provides a control circuit for a tunnel detection percussion device, comprising: a gas source; a first cylinder, the first cylinder including a first air chamber and a second air chamber divided by a first piston rod, the first air chamber being connected to the gas source, and an end of the first piston rod being connected to a percussion hammer of a percussion mechanism; a first solenoid valve, the first solenoid valve being connected to the first air chamber, the second air chamber, and the gas source; a second cylinder, the second cylinder including a third air chamber and a fourth air chamber divided by a second piston rod, the third air chamber being connected to the gas source, and an end of the second piston rod being connected to a sliding column of a lifting mechanism; a second solenoid valve, the second solenoid valve being connected to the third air chamber, the fourth air chamber, and the gas source; a relief valve, an inlet of the relief valve being located on a connecting flow path between the third air chamber and the second solenoid valve; and a pressure reducing valve, the pressure reducing valve being located on a connecting flow path between the gas source and the second solenoid valve.

[0024] Optionally, the first solenoid valve is a two-position four-way directional control valve, and the second solenoid valve is a three-position five-way directional control valve.

[0025] Optionally, it further comprises: a marking mechanism, the marking mechanism being connected to the gas source; and a third solenoid valve, the third solenoid valve being located on a connecting flow path between the marking mechanism and the gas source.

[0026] Optionally, the third solenoid valve includes an open position and a closed position. When the third solenoid valve is in the open position, a connecting flow path between the marking mechanism and the gas source is communicated; when the third solenoid valve is in the closed position, the connecting flow path between the marking mechanism and the gas source is disconnected.

[0027] Compared with the prior art, the technical solution of the embodiment of the present utility model has the following beneficial effects:

[0028] For the percussion device provided by this technical solution, the percussion hammer makes a reciprocating motion driven by a first driving component, realizing continuous automatic percussion of the tunnel dome by the percussion hammer. By controlling the action of the first driving component, the percussion frequency and strength of the percussion hammer on the tunnel can be kept uniform, realizing automatic percussion, saving manpower, improving efficiency and the accuracy of detection results; one end of the sliding column is connected to the percussion mechanism and the other end is connected to a second driving component, and the percussion mechanism can be lifted driven by the second driving component, and the height of the percussion mechanism can be adjusted according to the height of the tunnel dome, improving the applicable range of the percussion device. In addition, the percussion hammer realizes percussion under the action of the first driving component, and the percussion mechanism realizes lifting under the action of the second driving component. The structure is simple and convenient to assemble during use, which is beneficial to improving the efficiency of tunnel detection.

[0029] The control circuit provided by the embodiment of the present utility model controls the reciprocating motion of the first piston rod of the first cylinder through the reciprocating commutation of the first solenoid valve, thereby controlling the reciprocating knocking of the knocking hammer. The telescopic motion of the second piston rod of the second cylinder is controlled through the commutation of the second solenoid valve, thereby controlling the lifting of the sliding column in the lifting mechanism, and realizing the automatic knocking operation of the knocking device in tunnels at different heights. In addition, by setting a pressure reducing valve, the air pressure from the air source to the second cylinder is within a suitable range, and the initial height of the second piston rod can be set. When the knocking height of the knocking hammer changes, the second piston rod is automatically compressed or pushed and pulled, realizing the automatic height adjustment of the second piston rod within a certain stroke, so that the knocking mechanism adaptively adjusts the height. At the same time, in cooperation with the overflow valve, the gas is overflowed through the overflow valve when the second piston rod is automatically compressed, ensuring the working safety of the second cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a knocking device in an embodiment of the present utility model;

[0031] Figure 2 is a schematic structural diagram of a knocking mechanism in an embodiment of the present utility model;

[0032] Figure 3 is Figure 2 a schematic cross-sectional structural diagram of the knocking structure shown;

[0033] Figure 4 and Figure 5 is a schematic structural diagram of a lifting mechanism in an embodiment of the present utility model;

[0034] Figure 6 is a schematic structural diagram of a swing mechanism in an embodiment of the present utility model;

[0035] Figure 7 is a control circuit diagram of a knocking device in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] As described in the background art, in the aspect of tunnel detection technology, if manual knocking is used to detect tunnel voids, on the one hand, it is time-consuming and laborious, and the manual labor intensity is high. On the other hand, the detection results rely on manual judgment, and there are problems such as inaccurate judgment results. At present, some automatic knocking devices for detection have problems such as complex structure, heavy weight, inconvenient assembly, and high failure rate.

[0037] Therefore, to solve the above technical problems, an embodiment of the present utility model provides a tunnel detection knocking device, which includes a knocking mechanism and a lifting mechanism. Among them, the knocking mechanism includes a knocking hammer and a first driving component. The knocking hammer is connected to the first driving component and reciprocates under the drive of the first driving component; the lifting mechanism includes a sliding column and a second driving component. One end of the sliding column is connected to the knocking structure, and the other end is connected to the second driving component. Under the drive of the second driving component, the sliding column drives the knocking mechanism to move up and down. The structures of the knocking mechanism and the lifting mechanism of the knocking device in this solution are simple. Therefore, it has the advantages of simple assembly, lightweight device, etc. Moreover, the simple structure can reduce the failure rate and facilitate the disassembly, installation and maintenance of the device.

[0038] To make the above objects, features and beneficial effects of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings.

[0039] Figure 1 It is a schematic structural diagram of the knocking device in an embodiment of the present utility model; Figure 2 It is a schematic structural diagram of the knocking mechanism in an embodiment of the present utility model; Figure 3 is Figure 2 The cross-sectional structural diagram of the knocking structure shown; Figure 4 and Figure 5 It is a schematic structural diagram of the lifting mechanism in an embodiment of the present utility model; Figure 6 It is a schematic structural diagram of the swing mechanism in an embodiment of the present utility model.

[0040] Refer to Figure 1 , the knocking device 10 includes: a knocking mechanism 20, a lifting mechanism 30, a swing mechanism 40, and a moving platform (not shown). The lifting mechanism 30 is located between the knocking mechanism 20 and the swing mechanism 40. One end of the lifting mechanism 20 is connected to the knocking mechanism 20, and the other end is connected to the swing mechanism 40. After the knocking mechanism 20, the lifting mechanism 30, and the swing mechanism 40 are connected in sequence in the vertical direction, the whole can be installed on the moving platform. The moving platform moves along the extension direction of the tunnel. At the same time, the knocking mechanism 20 thereon realizes the automatic knocking on the top of the tunnel, realizing the function of the knocking device 10 to detect while walking and knocking.

[0041] The moving platform can be a rail car, an engineering vehicle or a train.

[0042] The knocking device 10 further includes a control module (not shown), and the control module is used to control the reciprocating motion of the knocking mechanism 20 and the lifting of the lifting mechanism 30.

[0043] In this embodiment, the control module includes a PLC controller.

[0044] Combined reference Figure 2 and Figure 3 , the knocking mechanism 20 includes a knocking hammer 21 and a first driving component, the first driving component is connected to the knocking hammer 21, and the first driving component is used to drive the knocking hammer 21 to reciprocate.

[0045] In this embodiment, the first driving component includes a first air cylinder 221, and the first air cylinder 221 drives the knocking hammer 21 to perform a linear reciprocating motion in the vertical direction. Using an air cylinder as the driving element, pneumatic driving can reduce the noise generated by the reciprocating motion of the knocking hammer 21, and can prevent the sound of the knocking hammer 21 hitting the tunnel dome from being interfered, making it clearer and easier to be identified if there are quality problems.

[0046] Specifically, the first driving component further includes a first solenoid valve 226 (reference Figure 7 ), the first air cylinder 221 includes a first cylinder barrel 222 and a first piston rod 223, and the first piston rod 223 is connected to the knocking hammer 21.

[0047] Reference Figure 1 , the knocking device 10 further includes an air source 50, the air source 50 provides gas, the first solenoid valve performs reciprocating commutation under the control of the control module, so as to control the first piston rod 223 to perform a reciprocating motion in the vertical direction, and the first piston rod 223 drives the knocking hammer 21 to perform a reciprocating motion in the vertical direction to knock on the tunnel top.

[0048] The knocking frequency can be adjusted by adjusting the commutation frequency of the solenoid valve, and can be specifically adjusted according to actual usage needs.

[0049] In this embodiment, the air source 50 uses an air pump; in other embodiments, the air source 50 can also use other devices that provide gas.

[0050] Continuing to refer to Figure 2 and Figure 3 , the knocking mechanism 20 further includes a housing 23, and the housing 23 covers the outside of the knocking hammer 21 and the first driving component.

[0051] The housing 23 can prevent substances such as dust generated during the knocking process from entering the knocking mechanism 21, and avoid problems such as malfunctions of the knocking mechanism 21 caused by dust.

[0052] Continuing to refer to Figure 2 and Figure 3, the knocking mechanism 20 further includes a guiding assembly 24, the guiding assembly 24 includes guiding wheels 241 and a fixing member 242, the guiding wheels 241 are installed on both sides of the fixing member 242, and the fixing member 242 is installed on the top of the housing 23.

[0053] Specifically, in this embodiment, there are 2 guiding wheels 241. The two guiding wheels 242 are respectively located on both sides of the housing 23. Through holes are provided on the top surface of the fixing member 242. When the knocking hammer 21 makes a reciprocating motion, it can penetrate through the through holes. Since the guiding wheels 241 are arranged on both sides of the fixing member 242, it is equivalent to that the knocking hammer 21 can pass through the middle of the guiding wheels 241.

[0054] In other embodiments, the number of guiding wheels 241 can also be other numbers.

[0055] In this embodiment, the arrangement direction of the guiding wheels 241 is parallel to the traveling direction of the knocking device 10. The guiding wheels 241 can guide the knocking direction of the knocking hammer 21, making the knocking direction of the knocking hammer 21 accurate, and the guiding wheels 241 can also play a stabilizing role, thus helping to make the knocking effect more stable.

[0056] In this embodiment, the knocking mechanism 21 further includes a shock pad 25, and the shock pad 25 is arranged at the bottom of the first driving assembly.

[0057] The shock pad 25 can reduce the vibration feeling when the knocking mechanism 20 operates, and reduce the damage to the knocking device 10 caused by the reaction force when the knocking hammer 21 knocks on the tunnel.

[0058] The shock pad 25 can be made of flexible materials such as rubber and sponge.

[0059] Reference Figure 4 , the lifting mechanism 30 includes a sliding column 31 and a second driving assembly. One end of the sliding column 31 is connected to the knocking mechanism 20, and the other end of the sliding column 31 is connected to the second driving assembly. The second driving assembly is used to drive the sliding column 31 to make a lifting motion.

[0060] In this embodiment, a first mounting plate 311 is provided at the top of the sliding column 31, and the knocking mechanism 20 is installed on the first mounting plate 311.

[0061] In this embodiment, the second driving assembly includes a second air cylinder 320. The second air cylinder 320 includes a second cylinder barrel 321 and a second piston rod 322. The second piston rod 322 is connected to the sliding column 31. The second piston rod 322 can extend and retract in the vertical direction, driving the sliding column 31 to move up and down in the vertical direction, and then driving the knocking mechanism 20 to move up and down in the vertical direction. Thus, the knocking device 10 can be applied to tunnel inspections at different heights, improving the applicable range of the knocking device 10.

[0062] In this embodiment, an air cylinder is used as the driving element of the lifting mechanism 30. During the movement of the knocking device 10, as the height of the tunnel top changes, due to the compressibility of the gas, the height of the sliding column 31 can be adjusted adaptively. Therefore, the height of the knocking mechanism 20 can be adjusted adaptively. When encountering a change in the detection height, manual adjustment is not required, and the implementation method is simple, the structure is simple, the weight of the device is reduced, and the failure rate can be lowered. Even if a failure occurs, it is convenient for disassembly, installation, and maintenance.

[0063] In this embodiment, the second driving assembly further includes a second solenoid valve 325 (refer to Figure 7 ). The second solenoid valve 325 is electrically connected to the control module. The second solenoid valve changes its direction under the control of the control module, thereby controlling the second piston rod 322 to extend and retract in the vertical direction, and then driving the knocking mechanism 20 to move up and down in the vertical direction through the sliding column 31.

[0064] In this embodiment, the second driving assembly further includes a pressure reducing valve 70 (refer to Figure 7 ). The pressure reducing valve 70 is connected to the gas flow path between the air source 50 and the second air cylinder 320; a relief valve 60 (refer to Figure 7 ). The inlet of the relief valve 60 is on the connection flow path between the air source 60 and the third air chamber 323, and the outlet of the relief valve 60 is connected to the external air.

[0065] In the specific application of this embodiment, after assembling the knocking device 10, the knocking hammer 21 abuts against the tunnel top. Set the outlet pressure of the pressure reducing valve 70 and switch the second solenoid valve 325 to the left position to push the second piston rod 322 upward, so that there is an interaction force between the knocking hammer 21 and the tunnel top. During the knocking process, the knocking device 10 moves with the moving platform, and the height of the tunnel will change. When the tunnel height becomes higher, sufficient air pressure will continue to push the second piston rod 322 upward, and the knocking hammer 21 can still knock on the tunnel top. When the tunnel height becomes lower, the tunnel top compresses the second piston rod 322 downward. At this time, due to the setting of the relief valve 60, the gas in the third air chamber 323 can overflow from the relief valve 60, and the height of the knocking hammer 21 naturally drops, realizing the adaptive adjustment of the height of the knocking hammer 21.

[0066] In this embodiment, the gas source 50 also supplies gas to the second cylinder 320.

[0067] Reference Figure 4 and Figure 5 Referring to

[0068] The lifting mechanism 30 further includes a slide rail 33 and a sliding member 34. The sliding member 34 is slidably connected to the slide rail 33. The sliding member 34 is connected to the sliding column 31, and the sliding member 34 is used to drive the sliding column 31 to slide along the slide rail 33.

[0069] In this embodiment, the fixed frame 35 is used to stabilize the slide rail 33 and the entire lifting mechanism 30, so that the lifting mechanism 30 remains stable during lifting.

[0070] In this embodiment, the sliding member 34 is a pulley; in other embodiments, a slider can also be used.

[0071] In this embodiment, the pulleys are divided into two groups, symmetrically arranged on both sides of the sliding column 31, and each group of pulleys includes two upper and lower ones. The number of slide rails 33 is 2, symmetrically arranged on the fixed frame 35. The pulleys slide along the inner track of the slide rail 33, which can improve the cooperation between the pulleys and the slide rail 33 and reduce the situation where the pulleys come out of the slide rail 33.

[0072] In other embodiments, slide rails 33 can also be arranged on the four surfaces of the fixed frame 35, and corresponding sliding members can be arranged on the sliding column 31.

[0073] Reference Figure 6 Referring to

[0074] During the operation of the knocking device 10, the knocking device 10 moves with the mobile platform. The knocking mechanism 20 knocks on the top of the tunnel, and the curvature of the top of the tunnel will change. At this time, the swing angle of the first swing assembly 41 can be adjusted, so as to adjust the direction of the knocking hammer 21 facing the top of the tunnel, so that the knocking direction is still perpendicular to the knocking surface, ensuring the knocking quality and being beneficial to the detection of the tunnel quality.

[0075] In this embodiment, the first swing assembly 41 is hinged to the support frame 42. The first swing assembly 41 swings around the hinge point of the first swing assembly 41 and the support member 42 as the axis, and the swing direction of the first swing assembly 41 is perpendicular to the moving direction of the knocking device 10.

[0076] In this embodiment, the first swing assembly 41 includes a first mounting table 410 and a first swing member 420. The first mounting table 410 is fixedly connected to the first swing member 420, and the first swing member 420 is rotatably connected to the support frame 42.

[0077] In this embodiment, the first mounting table 410 includes opposite first side edges 411 and opposite second side edges 412. The first side edges 411 and the second side edges 412 are perpendicular to each other, and the second side edges 412 are parallel to the moving direction of the knocking device 10.

[0078] In this embodiment, specifically, the number of the first swing members 420 is two, and the first swing members 420 are symmetrically arranged on the first side edge 411 of the first mounting table 410.

[0079] In this embodiment, the swing mechanism 40 further includes a third driving assembly 43. The third driving assembly 43 is connected to one side of the first swing assembly 41, and the third driving assembly 43 is used to drive the first swing assembly 41 to swing.

[0080] In this embodiment, the third driving assembly 43 adopts an electric push rod. The electric push rod includes a motor and a push rod. The push rod is connected to one side of the first swing assembly 41. Under the drive of the motor, the push rod pushes or pulls down one side of the first swing assembly 41 in the vertical direction, so that the first swing assembly 41 swings around its hinge point with the support frame 42, and further adjusts the knocking direction of the knocking hammer 21.

[0081] In this embodiment, the third driving assembly 43 is electrically connected to the control module. Specifically, the motor is electrically connected to the control module.

[0082] In this embodiment, the push rod is connected to one of the second side edges 412 of the first mounting table 410. The push rod can drive one of the second side edges 412 of the first mounting table 410 to move up or down. And because the first swing member 420 on the first side edge 411 is hinged to the support frame 42, when one of the second side edges 412 moves up and down under the action of the push rod, the angle of the first mounting table 410 will be flipped, thereby driving the angles of the lifting mechanism 30 and the knocking mechanism 20 thereon to be flipped, and the knocking angle of the knocking hammer 21 can be adjusted.

[0083] In this embodiment, the swing mechanism 40 further includes a second swing assembly 44, and the second swing assembly 44 is rotatably connected to the first swing assembly 41.

[0084] In this embodiment, the second swing assembly 44 is hinged to the first swing assembly 41.

[0085] In this embodiment, the second swing assembly 44 includes a second mounting table 440 and a second swing member 450. The top surface of the second mounting table 440 is used to mount the lifting mechanism, and the bottom surface is connected to the second swing member 450. The second swing member 450 is rotatably connected to the first mounting table 410.

[0086] In this embodiment, the operating principle of the second swing assembly 44 is the same as that of the first swing assembly 41, and will not be elaborated here.

[0087] It should be noted that the installation direction of the second swing member 450 is perpendicular to that of the first swing member 420, and the swing direction of the second swing assembly 44 is parallel to the moving direction of the knocking device 10. The function of the second swing assembly 44 is that during the moving knocking process of the knocking device 10, if it encounters an impact, the second swing assembly 44 can adjust the angle back and forth to provide a buffer force for the impact, thereby preventing the lifting mechanism 30 and the knocking mechanism 20 from being damaged by the impact.

[0088] In this embodiment, the second swing assembly 44 further includes a connecting rod 460. One end of the connecting rod 460 is connected to the second mounting table 440, and the other end is connected to the support frame 42, which is used to keep the second mounting table 440 stable during the movement of the knocking device 10, so as to maintain the stability of the lifting mechanism 30 and the knocking mechanism 20.

[0089] In other embodiments, the second swing assembly 44 may not be provided either.

[0090] In this embodiment, the knocking device 10 further includes: a cavity detection module, and the cavity detection module includes a sound collector (not shown), and the sound collector is used to acquire the sound of the knocking hammer 21 knocking on the tunnel; an analysis processor (not shown), the analysis processor is electrically connected to the sound collector and the control module, and the analysis processor is used to analyze and process the knocking sound collected by the sound collector and send a signal to the control module.

[0091] In this embodiment, the knocking device 10 further includes: a marking mechanism 80 (refer to Figure 7 ), the marking mechanism 80 is arranged on the knocking mechanism 20, the marking mechanism 80 is electrically connected to the control module, and the marking mechanism 80 is used to make a mark at the knocking position under the control of the control module.

[0092] In this embodiment, the marking mechanism 80 includes a sprayer (not shown) and a third solenoid valve 330 (refer to Figure 7 ), and the third solenoid valve 330 is electrically connected to the control module.

[0093] In this embodiment, the sprayer is equipped with colored paint. When the control module sends a marking signal to the marking mechanism 80, the nozzle of the sprayer faces the position where the hammer 21 strikes, leaving a mark at the striking point.

[0094] In this embodiment, the air source 50 provides aerodynamic force for the spraying of the sprayer.

[0095] The embodiment of the present utility model also provides a control circuit for the knocking device.

[0096] Figure 7 is the control circuit diagram of the knocking device in an embodiment of the present utility model. Refer to Figure 7 , the control circuit includes: a first cylinder 221, the first cylinder 221 includes a first air chamber 224 and a second air chamber 225 divided by a first piston rod 223, the first air chamber 224 is connected to the air source 50, and the end of the first piston rod 223 is connected to the hammer of the knocking mechanism; a first solenoid valve 226, the first solenoid valve 226 is connected to the first air chamber 224, the second air chamber 225, and the air source 50; a second cylinder 320, the second cylinder 320 includes a third air chamber 323 and a fourth air chamber 324 divided by a second piston rod 322, the third air chamber 323 is connected to the air source 50, and the end of the second piston rod 322 is connected to the sliding column of the lifting mechanism; a second solenoid valve 325, the second solenoid valve 325 is connected to the third air chamber 323, the fourth air chamber 324, and the air source 50; a relief valve 60, the inlet of the relief valve 60 is located on the connection flow path between the third air chamber 323 and the second solenoid valve 325; a pressure reducing valve 70, the pressure reducing valve 70 is located on the connection flow path between the air source 50 and the second solenoid valve 325.

[0097] In this embodiment, the first solenoid valve 226 is a two-position five-way directional control valve. The first solenoid valve 226 includes a first inlet P1, a first outlet T1, a second outlet T2, a first working port A1, and a second working port B1. The first inlet P1 is connected to the air source 50, the first outlet T1 and the second outlet T2 are in communication with the external air, the first working port A1 is connected to the first air chamber 224, and the second working port B1 is connected to the second air chamber 225.

[0098] When the first solenoid valve 226 is in the left position, the first inlet P1 is communicated with the first working port A1, and the first outlet T1 is communicated with the second working port B1. The gas provided by the gas source 50 enters the first air chamber 224, pushing the first piston rod 223 upward to rise. The gas in the second air chamber 225 is discharged through the second working port B1 and the first outlet T1. When the first solenoid valve 226 is in the right position, the first inlet P1 is communicated with the second working port B1, and the second outlet T2 is communicated with the first working port A1. The gas provided by the gas source 50 enters the second air chamber 225, compressing the first piston rod 223 downward, and the first piston rod 223 descends. The gas in the first air chamber 224 is discharged through the first working port A1 and the second outlet T2. Repeating this way, the hammer 21 connected to the first piston rod 223 makes a reciprocating up and down motion.

[0099] In this embodiment, the first solenoid valve 226 can set the commutation frequency to determine the knocking frequency of the hammer 21. The specific commutation frequency can be set according to the actual use requirements.

[0100] In this embodiment, the second solenoid valve 325 is a three-position five-way directional control valve, and the three-position five-way directional control valve is an O-type three-position valve. The three-position five-way directional control valve includes a second inlet P2, a third outlet T3, a fourth outlet T4, a third working port A2, and a fourth working port B2. The second inlet P2 is connected to the gas source 50. The third outlet T3 and the fourth outlet T4 are connected to the external air. The third working port A2 is connected to the third air chamber 323. The fourth working port B2 is connected to the fourth air chamber 324.

[0101] When the second solenoid valve 325 is in the left position, the second inlet P2 is communicated with the third working port A2, and the fourth outlet T4 is communicated with the fourth working port B2. The gas provided by the gas source 50 enters the third air chamber 323, pushing the second piston rod 322 upward to rise, driving the knocking mechanism to rise. The gas in the fourth air chamber 324 is discharged through the fourth working port B2 and the fourth outlet T4. When the second solenoid valve 325 is in the right position, the second inlet P2 is communicated with the fourth working port B2, and the third outlet T3 is communicated with the third working port A2. The gas provided by the gas source 50 enters the fourth air chamber 324, compressing the second piston rod 322 downward, driving the knocking mechanism to descend. The gas in the third air chamber 323 is discharged through the third working port A2 and the third outlet T3. When the second solenoid valve 325 is in the middle position, the second piston rod 322 stops moving, and the lifting mechanism remains at the current height.

[0102] In this embodiment, the function of the pressure reducing valve 70 is to regulate the pressure from the gas source 50 to the first cylinder 221.

[0103] In this embodiment, the inlet of the overflow valve 60 is located on the connecting flow path between the third air chamber 323 and the second solenoid valve 325. The outlet of the overflow valve 60 is in communication with the external air. The overflow valve 60 is used to discharge excess gas.

[0104] In specific applications, after the knocking device 10 is assembled, the knocking hammer 21 abuts against the top of the tunnel. Set the outlet pressure of the pressure reducing valve 70 and switch the second solenoid valve 325 to the left position. Push the second piston rod 322 upward so that there is an interaction force between the knocking hammer 21 and the top of the tunnel. During the knocking process, the knocking device 10 moves along with the mobile platform, and the height of the tunnel will change. When the height of the tunnel increases, sufficient air pressure will continue to push the second piston rod 322 upward, and the knocking hammer 21 can still knock on the top of the tunnel. When the height of the tunnel decreases, the top of the tunnel compresses the second piston rod 322 downward. At this time, due to the setting of the overflow valve 60, the gas in the third air chamber 323 can overflow from the overflow valve 60, and the height of the knocking hammer 21 will naturally decrease, realizing the adaptive adjustment of the height of the knocking hammer 21.

[0105] In this embodiment, the overflow pressure of the overflow valve 60 is greater than the set pressure of the pressure reducing valve 70.

[0106] It further includes: a marking mechanism, the marking mechanism is connected to the air source 50; a third solenoid valve 330, the third solenoid valve 330 is located on the connecting flow path between the marking mechanism and the air source 50.

[0107] In this embodiment, the third solenoid valve 330 is a two-position two-way reversing valve. The third solenoid valve 330 includes an open position and a closed position. When the third solenoid valve 330 is in the open position, the connecting flow path between the marking mechanism 80 and the air source 50 is in communication; when the third solenoid valve 330 is in the closed position, the connecting flow path between the marking mechanism 80 and the air source 50 is disconnected.

[0108] In this embodiment, the marking mechanism 80 is a sprayer. The nozzle of the sprayer is connected to the air source 50. When the third solenoid valve 330 is opened, the air source 50 provides aerodynamic force to the nozzle, and the nozzle sprays the colored paint in the sprayer onto the knocking location to complete the marking of the problem point.

[0109] In this embodiment, the air source 50 uses an air pump; in other embodiments, the air source 50 can also use other devices that provide gas.

[0110] In this embodiment, the control circuit further includes a pneumatic triple unit 90. The pneumatic triple unit 90 is connected to the air source 50. The pneumatic triple unit 90 is used to perform functions such as voltage stabilization, filtration, and oil lubrication on the gas provided by the air source 50.

[0111] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A tunnel detection knocking device, characterized in that, Comprising: A knocking mechanism, the knocking mechanism includes a knocking hammer and a first driving component, the first driving component is connected to the knocking hammer, and the first driving component is used to drive the knocking hammer to make a reciprocating motion; a lifting mechanism, the lifting mechanism includes a sliding column and a second driving component, one end of the sliding column is connected to the knocking mechanism, the other end of the sliding column is connected to the second driving component, and the second driving component is used to drive the sliding column to make a lifting motion.

2. The tunnel detection knocking device according to claim 1, characterized in that, The knocking mechanism further includes a guiding component, the guiding component includes guiding wheels, the guiding wheels are symmetrically arranged on both sides of the knocking hammer, and the knocking hammer passes through the middle of the guiding wheels.

3. The tunnel detection knocking device according to claim 2, wherein, The knocking mechanism further includes a housing, and the housing covers the outside of the knocking hammer and the first driving component.

4. The tunnel detection knocking device according to claim 3, characterized in that, The guiding component further includes a fixing member, the guiding wheels are installed on the fixing member, and the fixing member is connected to the top of the housing.

5. The tunnel detection knocking device according to claim 1, wherein The knocking mechanism further includes a shock pad, and the shock pad is arranged at the bottom of the first driving component.

6. The tunnel detection knocking device according to claim 1, characterized in that, The lifting mechanism further includes a slide rail and a sliding member, the sliding member is connected to the sliding column, and the sliding member is used to drive the sliding column to slide along the slide rail.

7. The tunnel detection knocking device according to claim 6, wherein, The sliding member includes a pulley or a slider.

8. The tunnel detection knocking device according to claim 6, characterized in that, The lifting mechanism further includes a fixing frame, the slide rail is installed on the fixing frame, and the sliding column makes a lifting motion along the slide rail within the fixing frame.

9. The tunnel detection knocking device according to claim 1, characterized in that, Also comprising: A swinging mechanism, one end of the lifting mechanism is connected to the knocking mechanism, and the other end of the lifting mechanism is connected to the swinging mechanism.

10. The tunnel detection percussion device according to claim 9, characterized in that, The swinging mechanism includes a first swinging component and a support frame, and the first swinging component is rotatably connected to the support frame.

11. The tunnel detection knocking device according to claim 10, wherein, The first swinging component is hinged to the support frame.

12. The tunnel detection knocking device according to claim 10, wherein, The swinging mechanism further includes a third driving component, the third driving component is connected to one side of the first swinging component, and the third driving component is used to drive the first swinging component to swing.

13. The tunnel detection knocking device according to claim 12, characterized in that, Also comprising: A control module, the control module is electrically connected to the first driving component, the second driving component, and the third driving component.

14. The tunnel detection knocking device according to claim 13, characterized in that, The first driving component includes a first air cylinder and a first solenoid valve, and the first solenoid valve is electrically connected to the control module.

15. The tunnel detection knocking device according to claim 13, wherein, The second driving component includes a second air cylinder and a second solenoid valve, and the second solenoid valve is electrically connected to the control module.

16. The tunnel detection knocking device according to claim 15, characterized in that, Also comprising: A cavity detection module, the cavity detection module includes a sound collector and an analysis processor, the sound collector is used to collect the knocking sound of the knocking hammer, and the analysis processor is electrically connected to the sound collector and the control module.

17. The tunnel detection knocking device according to claim 16, characterized in that, Also comprising: A marking mechanism, the marking mechanism is arranged on the knocking mechanism, and the marking mechanism is electrically connected to the control module.

18. A control circuit of a tunnel detection knocking device, characterized in that, Comprising: An air source; A first air cylinder, the first air cylinder includes a first air chamber and a second air chamber divided by a first piston rod, the first air chamber is connected to the air source, and the end of the first piston rod is connected to the knocking hammer of the knocking mechanism; A first solenoid valve, the first solenoid valve is connected to the first air chamber, the second air chamber, and the air source; The second cylinder, the second cylinder includes a third air chamber and a fourth air chamber divided by a second piston rod, the third air chamber is connected to the air source, and the end of the second piston rod is connected to the sliding column of the lifting mechanism; The second solenoid valve, the second solenoid valve is connected to the third air chamber, the fourth air chamber and the air source; The overflow valve, the inlet of the overflow valve is located on the connecting flow path between the third air chamber and the second solenoid valve; The pressure reducing valve, the pressure reducing valve is located on the connecting flow path between the air source and the second solenoid valve.

19. The control circuit of the tunnel detection knocking device according to claim 18, characterized in that The first solenoid valve is a two-position five-way directional control valve, and the second solenoid valve is a three-position five-way directional control valve.

20. The control circuit of the tunnel detection knocking device according to claim 18, characterized in that, It further includes: The marking mechanism, the marking mechanism is connected to the air source; The third solenoid valve, the third solenoid valve is located on the connecting flow path between the marking mechanism and the air source.

21. The control loop of the tunnel detection knocking device according to claim 20, wherein, The third solenoid valve includes an open position and a closed position. When the third solenoid valve is in the open position, the connecting flow path between the marking mechanism and the air source is communicated; when the third solenoid valve is in the closed position, the connecting flow path between the marking mechanism and the air source is disconnected.

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