Tunnel core drilling and sampling equipment

Abstract

The invention relates to the technical field of concrete coring equipment, and discloses tunnel core drilling sampling equipment which comprises a gravity acceleration sensor and a core drilling machine. The core drilling machine comprises a frame body, a connecting base arranged on the frame body, a driving source arranged on the connecting base and a drilling barrel installed on the connecting base, and the driving source is connected with an external power source and used for driving the drilling barrel to rotate on the connecting base. The gravitational acceleration sensor is located in an inner cavity of the drill cylinder and fixed to the position to be sampled, a connecting line is connected to the gravitational acceleration sensor, the connecting line is connected with an external power source for controlling the driving source, and when a core sample is completed and moves, the core sample is driven by the gravitational acceleration sensor to move. The gravitational acceleration sensor receives a movement speed signal of the core sample, and an external power supply receives a signal of the gravitational acceleration sensor to turn off a power supply for the driving source. Core drilling can be stopped when the core sample is completed, and damage to the waterproof plate is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of concrete coring equipment, and in particular to a tunnel core sampling equipment. Background Art

[0002] In the tunnel waterproofing design, the waterproof board is laid as the inner waterproof layer between the initial support and the concrete lining. This design method can ensure that the waterproof board fits tightly with the inner wall of the tunnel, effectively preventing groundwater or other liquids from leaking into the tunnel.

[0003] Tunnel lining is a permanent support structure built with reinforced concrete and other materials along the perimeter of the tunnel to prevent deformation or collapse of the surrounding rock. After the tunnel construction is completed, the concrete lining part of the tunnel needs to be cored to check whether the thickness of the concrete lining part meets the requirements.

[0004] At present, when coring, workers usually hold the coring device to operate. During the operation, due to the uncertainty of concrete thickness, the workers rely more on their experience and feeling to judge whether the coring is completed. The waterproof board layer is behind the concrete lining layer, so it is easy to damage the waterproof board during the coring process, which will affect the subsequent waterproof performance. Summary of the invention

[0005] In order to reduce the damage to the waterproof board during the coring process, the present application provides a tunnel core sampling device.

[0006] This application adopts the following technical solutions: A tunnel core sampling device comprises a gravity acceleration sensor and a core drilling machine; the core drilling machine comprises a frame, a connecting seat arranged on the frame, a driving source arranged on the connecting seat and a drill barrel installed on the connecting seat, the driving source is connected to an external power supply and is used to drive the drill barrel to rotate on the connecting seat; the gravity acceleration sensor is located in the inner cavity of the drill barrel and is fixed at a position to be sampled, a connecting line is connected to the gravity acceleration sensor, and the connecting line is connected to an external power supply that controls the driving source, when the core sample is completed and moves, the gravity acceleration sensor receives a movement speed signal of the core sample, and the external power supply receives the signal from the gravity acceleration sensor and turns off the power to the driving source.

[0007] By adopting the above technical scheme, when core drilling is carried out, the gravity acceleration sensor is installed at the position to be sampled, and the gravity acceleration is located inside the drill barrel when coring; the gravity acceleration sensor is connected to the external power supply of the external control drive source, and when the core sampling is completed, the core sample will move, and the gravity acceleration can be affected by the movement, and the signal is transmitted to the external power supply through the connecting line, so that the external power supply cuts off the power supply to the drill barrel, and the drill barrel can be stopped, so that the drill barrel can be stopped when the core sampling is completed during the coring process, thereby reducing the damage to the waterproof board.

[0008] Optionally, a connecting head is rotatably connected to the connecting seat, the drill tube is connected to the connecting head, and the driving source is connected to the connecting head to drive the connecting head to rotate, the connecting head is an internal hollow structure, and the connecting line of the gravity acceleration sensor passes through the connecting head.

[0009] By adopting the above technical solution, the drill tube and the connector are connected, and the connector is a hollow structure, which makes it easy for the connecting wire of the gravity acceleration sensor to pass through the connector and connect to the external power supply system.

[0010] Optionally, the connecting seat is an internal hollow structure, one end of the connecting head extends into the inner cavity of the connecting seat and a driven wheel is coaxially arranged on the outer wall, the driving source includes a driving wheel and a first element installed on the connecting seat and used to drive the driving wheel, and the driving wheel and the driven wheel cooperate so that the driven wheel can be driven to rotate when the driving wheel rotates.

[0011] By adopting the above technical solution, the first element can drive the driving wheel to rotate, and the driving wheel and the driven wheel cooperate to realize the rotation of the driven wheel. The driving wheel and the driven wheel can be matched by gears, synchronous belts, etc.

[0012] Optionally, blades are arranged at intervals at the end of the drill barrel, and a plurality of blades are arranged at intervals along the circumferential direction of the drill barrel, and the inner walls of the blades are arranged to be inclined toward the axial direction of the drill barrel.

[0013] By adopting the above technical solution, the inner wall of the blade is inclined, so that during the cutting process, there can be a certain gap between the formed core sample and the inside of the drill barrel, making it easier to move when coring is completed, thereby making it easier for the gravity acceleration sensor to receive signals.

[0014] Optionally, a positioning cylinder is provided inside the connecting seat, and the connecting line passes through the positioning cylinder. An elastic member is provided in the positioning cylinder, and the elastic member is connected between the end of the positioning cylinder and the outer wall of the connecting line. During the coring process, the elastic member provides a force for the gravity acceleration sensor to move downward through the connecting line.

[0015] By adopting the above technical solution, under the action of the elastic member, the connecting line can provide a force for the gravity acceleration sensor to move downward, and when the core sample is completed, a force for the core sample to move is provided, so that the gravity acceleration sensor can transmit signals better and faster.

[0016] Optionally, a water trough is provided on the side wall of the drill barrel, one end of the water trough penetrates to a position between adjacent blades, and an outer wall of one end of the drill barrel close to the connecting seat is rotatably connected to a rotating ring, an annular groove is provided in the rotating ring, and the other end of the water trough penetrates to one end of the drill barrel close to the connecting seat and is connected to the annular groove, and the rotating ring is used to connect to an external water supply source.

[0017] By adopting the above technical solution, the rotating ring is connected to an external water source, and water can be sprayed on the drill tube to cool it down during the coring process.

[0018] Optionally, the core sampling equipment also includes a base, the frame is installed on the base, the base is provided with a clearance groove for the drill tube to pass through, the base is provided with a collection barrel for collecting materials, and the drill tube is located in the collection barrel.

[0019] By adopting the above technical solution, the barrel base is installed and fixed to the frame, and a collecting barrel is installed on the base. Some dust, water, etc. generated during the drilling process can be collected and discharged through the collecting barrel.

[0020] Optionally, the collecting barrel includes a fixed barrel and a sliding barrel, the fixed barrel is installed on the base, the sliding barrel is slidably inserted in the fixed barrel, and a reset member is provided between the sliding barrel and the fixed barrel, and the side wall of the drill barrel is provided with an annular convexity. When the drill barrel passes through the give way groove, the annular convexity can abut against the end of the sliding barrel and push the sliding barrel to slide, and the reset member is compressed.

[0021] By adopting the above technical solution, the sliding cylinder is slidably connected to the fixed cylinder, and the sliding cylinder is sleeved on the outer wall of the drill cylinder. When drilling the cylinder, the drill cylinder pushes the sliding cylinder to slide through the annular convexity, so that the sliding cylinder can collect dust, water, etc. during the core drilling process.

[0022] Optionally, some rotations of the annular protrusion toward the sliding cylinder are provided with balls.

[0023] By adopting the above technical solution, the friction between the annular convexity and the end of the sliding cylinder is reduced.

[0024] In summary, the present application includes at least one of the following beneficial effects: 1. When sampling, when the core sample moves after sampling, the gravity acceleration sensor can receive the signal of the core sample movement and transmit the signal through the connecting line, so that the driving source can stop, thereby stopping the drilling sample, thereby reducing the damage to the waterproof board; 2. Through the cooperation of the sliding cylinder and the fixed cylinder, the water and dust generated during the core drilling process can be collected, reducing the burden on the workers during the core drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is a cross-sectional schematic diagram of an embodiment of the present application; Figure 3 is a schematic diagram of a connector in an embodiment of the present application; Figure 4 is an exploded schematic diagram of the positioning tube and the connecting wire in the embodiment of the present application; Figure 5 It is a schematic diagram of the explosion of the collecting barrel in the embodiment of the present application.

[0026] Explanation of the reference numerals: 1. Gravity acceleration sensor; 2. Core drilling machine; 201. Frame; 202. Connecting seat; 203. Driving source; 2031. Driving wheel; 2032. First element; 204. Drill barrel; 3. Connecting line; 4. Connecting head; 5. Driven wheel; 6. Blade; 7. Positioning cylinder; 8. Elastic member; 9. Water tank; 10. Rotating ring; 11. Ring groove; 12. Base; 13. Give way groove; 14. Collecting barrel; 141. Fixed barrel; 142. Sliding barrel; 143. Resetting member; 15. Sliding groove; 16. Ring convex; 17. Ball; 18. Positioning column; 19. Water inlet pipe; 20. Water outlet pipe. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-5 This application is described in further detail.

[0028] The present application embodiment discloses a tunnel core sampling device. Figure 1 The tunnel core sampling equipment of the present application is mainly used for tunnel sampling. The inner layer of the tunnel is provided with a waterproof board, which is usually a polymer material with good waterproof, moisture-proof and weather-resistant properties. The waterproof board is located on the inner side of the concrete lining layer. When coring the concrete lining layer, it is easy to cause damage to the waterproof board, thereby affecting the subsequent waterproof effect of the waterproof board.

[0029] In order to reduce the damage to the waterproof board during the coring process, the core sampling equipment in this embodiment includes a gravity acceleration sensor 1 and a core drilling machine 2. The core drilling machine 2 includes a frame 201, a connecting seat 202 installed on the frame 201, a driving source 203 installed on the connecting seat 202, and a drill tube 204 installed on the connecting seat 202. The driving source 203 is used to drive the drill tube 204 to rotate so that the drill tube 204 can drill core samples. During the coring process, the connecting seat 202 is driven to move on the frame 201, so that the drill tube 204 can continue to penetrate into the concrete. The movement of the connecting seat 202 on the frame 201 is a prior art and is not the focus of this application, so it will not be described in detail here.

[0030] Reference Figure 2 and Figure 3 When drilling cores, the gravity acceleration sensor 1 is fixed to the position to be sampled by means of bolts or strong adhesive tape. In order to sample better, the sampling position is selected by means of hollow hammers and other methods where the contact between the concrete layer and the waterproof board is not tight. After the gravity acceleration sensor 1 is installed, the drill barrel 204 is sampling. During the core drilling process, the gravity acceleration sensor 1 is located in the inner cavity of the drill barrel 204. A connecting line 3 is connected to the gravity acceleration sensor 1, and the connecting line 3 is used to transmit signals, and the connecting line 3 is connected to an external system for providing power to the driving source 203. When the core drilling is completed, the core sample and the concrete layer are separated and can move. The gravity acceleration sensor 1 detects the movement of the core sample and transmits the signal, thereby controlling the power of the driving source 203 to be turned off, and the drill barrel 204 stops rotating, and the operator knows that the core sampling is completed.

[0031] In a further embodiment, the connection seat 202 is an internal hollow structure, and a connector 4 is rotatably mounted on the connection seat 202, one end of the connector 4 extends into the inner cavity of the connection seat 202, and the other end has a portion that exceeds the surface of the connection seat 202. The drill tube 204 is mounted on the end of the connector 4, and the end of the drill tube 204 is provided with a hollow threaded tube portion, and is connected to the inner cavity of the drill tube 204 for the connection line 3 to pass through, and the drill tube 204 is threadedly connected to the outer wall of the connector 4. The thread direction of the drill tube 204 and the connector 4 is opposite to the direction of the drill tube 204 for core sampling, so that the drill tube 204 will not loosen during core drilling. The connector 4 is an internally hollow cylindrical shape, and the connection line 3 of the gravity acceleration sensor enters the connection seat 202 from the connector 4, and then passes through the shell of the connection seat 202, so that the connection line 3 does not affect the rotation of the drill tube 204.

[0032] The driving source 203 includes a driving wheel 2031 and a first element 2032, wherein the first element 2032 is preferably a motor, which is fixed on the outer wall of the connecting seat 202, the output shaft of the motor extends into the inner cavity of the connecting seat 202, and the driving wheel 2031 is coaxially fixed to the outer wall of the output shaft of the motor. The first element 2032 can drive the driving wheel 2031 to rotate. The outer wall of one end of the connector 4 extending into the inner cavity of the connecting seat 202 is coaxially fixed with a driven wheel 5, which is matched with the driving wheel 2031, and when the driving wheel 2031 rotates, the driven wheel 5 can be driven to rotate. In the present embodiment, the driven wheel 5 and the driving wheel 2031 can be gears, which mesh with each other to achieve synchronous rotation. In other embodiments, the driving wheel 2031 and the driven wheel 5 are connected together by a synchronous belt or a synchronous chain, etc., and synchronous rotation can also be achieved.

[0033] Reference Figure 2 A blade 6 is fixed to one end of the drill tube 204 away from the connection seat 202, and a plurality of blades 6 are evenly arranged along the circumference of the drill tube 204. The thickness of the blade 6 gradually decreases toward the drill tube 204, and the inner wall of the blade 6 is inclined toward the axis of the drill tube 204, so that there is a certain gap between the core sample and the inner wall of the drill tube 204, thereby reducing the friction force on the core sample when it moves and improving the detection effect of the gravity sensor.

[0034] In a further embodiment, referring to Figure 3 and Figure 4 A positioning cylinder 7 is fixed in the inner cavity of the connecting seat 202. The positioning cylinder 7 is an internal hollow structure. After the connecting head 4 of the connecting line 3 passes through, it enters the positioning cylinder 7. One end of the positioning cylinder 7 is located directly below the connecting head 4, so that the connecting line 3 and the connecting head 4 will not contact each other. The end of the positioning cylinder 7 is bent to avoid the first element 20232. An elastic member 8 is installed in the positioning cylinder 7. The elastic member 8 is a spring. One end of the spring is connected to the end of the positioning cylinder 7, and the other end is connected to the side wall of the connecting line 3. When the gravity acceleration sensor 1 is installed at the position to be sampled, the elastic member 8 is in a compressed state, providing a force for the gravity acceleration sensor 1 to move downward. And in the process of core drilling, after the connecting seat 202 moves, the elastic member 8 always remains in a compressed state, thereby improving the movement effect when the core sample is completed.

[0035] Reference Figure 2 and Figure 3In order to cool down the blade 6 of the drill tube 204 during the core drilling process, a water tank 9 is provided on the side wall of the drill tube 204. The water tank 9 runs from the position between two adjacent blades 6 to the end of the drill tube 204. The end of the drill tube 204 away from the blade 6 is rotatably connected to a rotating ring 10. The rotating ring 10 and the drill tube 204 are connected in a rotary seal. An annular groove 11 is provided in the rotating ring 10, and the annular groove 11 is connected to the water tank 9. The pipeline of the external water source is connected to the rotating ring 10 through the water inlet pipe 19, and water is supplied by pumping. The water can enter the annular groove 11 and then enter the water tank 9. Furthermore, a positioning column 18 is installed on the connecting seat 202, and a socket for the positioning column 18 to be inserted is provided on the rotating ring 10. When the drill tube 204 is installed on the connecting seat 202, the positioning column 18 is inserted into the socket. Under the action of the positioning column 18, the rotating ring 10 is not easy to rotate, thereby making it easier to enter water.

[0036] Reference Figure 1 and Figure 2 In the process of core drilling, the water flowing out of the water cooling device may easily affect the staff. In order to overcome this problem, the core sampling device further includes a base 12. When core drilling, the base 12 is fixed to the surface of the concrete layer, and the frame 201 is installed on the base 12. A clearance groove 13 is provided on the base 12, and the drill tube 204 can pass through the clearance groove 13 for core drilling. A collection barrel 14 is coaxially fixed on the base 12 along the outer side of the clearance groove 13, and the dust and water during core drilling are collected and processed through the collection barrel 14.

[0037] Reference Figure 2 and Figure 5 The collecting barrel 14 includes a fixed barrel 141 fixed on the base 12 and a sliding barrel 142 slidably connected to the fixed barrel 141. The fixed barrel 141 and the clearance groove 13 are coaxially arranged, and the inner diameter of the fixed barrel 141 is larger than the diameter of the clearance groove 13. A sliding groove 15 is provided on the fixed barrel 141, and the sliding barrel 142 is slidably inserted in the sliding groove 15, and the drill barrel 204 slides through the lower end of the sliding barrel 142. A reset member 143 is installed in the sliding groove 15, and the reset member 143 is a spring, one end of the spring is connected to the sliding groove 15, and the other end is connected to the end of the sliding barrel 142. The outer wall of the drill barrel 204 is fixed with an annular protrusion 16. When the drill barrel 204 continues to move forward, the annular protrusion 16 can abut against the sliding barrel 142 and push the sliding barrel 142 to slide into the fixed barrel 141. The sliding cylinder 142 can collect water flowing out during water cooling, and a water outlet pipe 20 can be fixed on the sliding cylinder 142 to drain the water. A guide groove or the like can be provided between the sliding cylinder 142 and the fixed cylinder 141, so that the sliding cylinder 142 cannot rotate in the fixed cylinder 141, thereby improving stability. In addition, a plurality of balls 17 are provided on one side of the annular protrusion 16 that rotates toward the sliding cylinder 142, thereby reducing the friction between the annular protrusion 16 and the sliding cylinder 142.

[0038] The implementation principle of a tunnel core sampling device in an embodiment of the present application is: when drilling the core, a gravity acceleration sensor 1 is installed at the position to be sampled. When the core sample is completed, movement will occur. The movement signal detected by the gravity acceleration sensor 1 cuts off the power to the driving source 203, causing the drill tube 204 to stop rotating, thereby reducing the possibility of damage to the waterproof board.

[0039] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tunnel core sampling device, characterized in that: The invention comprises a gravity acceleration sensor (1) and a core drilling machine (2); the core drilling machine (2) comprises a frame (201), a connecting seat (202) arranged on the frame (201), a driving source (203) arranged on the connecting seat (202), and a drill tube (204) installed on the connecting seat (202); the driving source (203) is connected to an external power source and is used to drive the drill tube (204) to rotate on the connecting seat (202); the gravity acceleration sensor (1) is located in the inner cavity of the drill tube (204) and is fixed at a position to be sampled; a connecting line (3) is connected to the gravity acceleration sensor (1), and the connecting line (3) is connected to an external power source for controlling the driving source (203); when the core sample is completed and moves, the gravity acceleration sensor (1) receives a movement speed signal of the core sample, and the external power source receives the signal from the gravity acceleration sensor (1) and turns off the power supply to the driving source (203).

2. A tunnel core sampling device according to claim 1, characterized in that: A connecting head (4) is rotatably connected to the connecting seat (202), the drill tube (204) is connected to the connecting head (4), and the driving source (203) is connected to the connecting head (4) to drive the connecting head (4) to rotate. The connecting head (4) is an internal hollow structure, and the connecting line (3) of the gravity acceleration sensor (1) passes through the connecting head (4).

3. A tunnel core sampling device according to claim 2, characterized in that: The connecting seat (202) is an internal hollow structure, one end of the connecting head (4) extends into the inner cavity of the connecting seat (202) and a driven wheel (5) is coaxially arranged on the outer wall, the driving source (203) comprises a driving wheel (2031) and a first element (2032) mounted on the connecting seat (202) and used to drive the driving wheel (2031) to cooperate, and the driving wheel (2031) and the driven wheel (5) cooperate so that when the driving wheel (2031) rotates, the driven wheel (5) is driven to rotate.

4. A tunnel core sampling device according to claim 3, characterized in that: Blades (6) are arranged at intervals at the end of the drill tube (204), a plurality of blades (6) are arranged at intervals along the circumferential direction of the drill tube (204), and the inner walls of the blades (6) are arranged to be inclined in the axial direction of the drill tube (204).

5. The tunnel core sampling device according to claim 4, characterized in that: A positioning cylinder (7) is arranged inside the connection seat (202), and the connection line (3) passes through the positioning cylinder (7). An elastic member (8) is arranged in the positioning cylinder (7), and the elastic member (8) is connected between the end of the positioning cylinder (7) and the outer wall of the connection line (3). During the coring process, the elastic member (8) provides a force for the gravity acceleration sensor (1) to move downward through the connection line (3).

6. The tunnel core sampling device according to claim 4, characterized in that: A water trough (9) is provided on the side wall of the drill tube (204), one end of the water trough (9) penetrates to a position between adjacent blades (6), an outer wall of one end of the drill tube (204) close to the connecting seat (202) is rotatably connected to a rotating ring (10), an annular groove (11) is provided in the rotating ring (10), the other end of the water trough (9) penetrates to one end of the drill tube (204) close to the connecting seat (202) and is connected to the annular groove (11), and the rotating ring (10) is used to connect to an external water supply source.

7. The tunnel core sampling device according to claim 6, characterized in that: The core sampling device further comprises a base (12), the frame (201) being mounted on the base (12), the base (12) being provided with a clearance groove (13) for the drill tube (204) to pass through, the base (12) being provided with a material collecting barrel (14) for collecting materials, and the drill tube (204) being located in the material collecting barrel (14).

8. The tunnel core sampling device according to claim 7, characterized in that: The collecting barrel (14) comprises a fixed barrel (141) and a sliding barrel (142), wherein the fixed barrel (141) is mounted on the base (12), the sliding barrel (142) is slidably inserted into the fixed barrel (141), and a reset member (143) is provided between the sliding barrel (142) and the fixed barrel (141), and a side wall of the drill barrel (204) is provided with an annular protrusion (16), and when the drill barrel (204) passes through the clearance groove (13), the annular protrusion (16) can abut against the end of the sliding barrel (142) and push the sliding barrel (142) to slide, and the reset member (143) is compressed.

9. The tunnel core sampling device according to claim 8, characterized in that: A ball (17) is provided for some rotation of the annular protrusion (16) toward the sliding cylinder (142).

Images