Sampling device for underwater geotechnical engineering

Abstract

The utility model discloses a sampling device for underwater geotechnical engineering, which comprises a sampling head and an extension rod, the sampling head comprises a stabilizing frame seat, a sampling drill bit and a sampling motor, the extension rod comprises a hollow extension section and a pressure section connected with the sampling head, and an electric hydraulic cylinder is arranged in the pressure section. The tail end of the sampling drill bit abuts against a piston rod of the electric hydraulic cylinder, and a sampling motor and a power signal line of the electric hydraulic cylinder extend to a controller on the water surface from an inner hole of the extension rod. According to the underwater rock-soil sampling device disclosed by the utility model, the extension rod is arranged to be matched with the underwater photographing device, so that positioning tapping sampling can be controlled on the water surface, and a rock sample at a specified depth can be directly obtained in place at one time through independent control design of the sampling motor and the electric hydraulic cylinder and discharging design of the rear end of the sampling pipe; the problems of low sampling efficiency caused by repeated stretching and retracting, pollution influence of the underwater environment on the sampling position and the like are reduced, and the fixed-point investigation and detection requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of surveying tools, in particular to a sampling device used for underwater geotechnical engineering. Background Art

[0002] With the advancement of my country's marine development and the development of inland engineering construction towards water areas, the exploration technology results in the early stage of the project are able to reflect the actual geological conditions. Drilling construction is developing towards standardization, normalization and technology. The drilled core soil samples can present a complete form, so that engineering geologists can accurately identify and determine the state of the formation.

[0003] At present, the marine engineering projects developed in my country are mainly located in the intertidal zone and offshore waters, using a four-legged lifting drilling platform. The construction of this platform is not affected by wind and waves and has a certain effect, but it is greatly affected by the uneven settlement of the shallow bearing layer and is prone to capsizing. At the same time, the platform can only be used for drilling construction in shallow waters; a drilling rig is installed on a construction ship and dives into the water to take coring. This solution is currently quite popular, but it is inconvenient to operate and take coring points under the water. Therefore, operators mostly use manual diving to carry out the work. However, in some harsh offshore waters, when it is inconvenient for workers to go into the water directly, a device that can take samples on the water surface is needed to meet the work needs of special waters. In addition, for some operations, sampling is required from specific rock formations, and the devices in the existing technology generally take samples from top to bottom in sequence. Due to the limitations of the sampling device, multiple repetitive operations are required to meet the requirements. Utility Model Content

[0004] In view of the prior art, the purpose of the present invention is to provide a sampling device for underwater rock engineering that is convenient to operate and can improve the sampling effect.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is: a sampling device for underwater geotechnical engineering, including a sampling head and an extension rod, the sampling head including a stable frame, a sampling drill bit and a sampling motor, the sampling motor main shaft is connected to the rotation of the sampling drill bit relative to the stable frame, the extension rod includes a hollow extension section and a pressure section connected to the sampling head, an electric hydraulic cylinder is arranged in the pressure section, the end of the sampling drill bit abuts on the piston rod of the electric hydraulic cylinder, and the power signal line of the sampling motor and the electric hydraulic cylinder extends from the inner hole of the extension rod to the controller setting on the water surface.

[0006] As a further configuration of the above scheme, the sampling drill bit includes a sampling tube and a drill rod located at the front end of the sampling tube. The sampling motor is fixed in the sampling tube to drive the drill rod to perform rotary drilling. A discharge port is provided at the rear end of the sampling tube.

[0007] As a further configuration of the above solution, the drill rod includes a spiral material guide portion and a rotary crushing portion, and the rotary crushing portion includes a plurality of crushing head fixing frames and crushing drill bit assemblies sequentially arranged along the spiral material guide portion.

[0008] As a further configuration of the above solution, the sampling tube is fixed in abutment with the piston rod, and the electric hydraulic cylinder is used to provide an axial thrust for the sampling drill bit to penetrate into the rock formation.

[0009] As a further configuration of the above solution, the hollow extension section includes a rod body, a connector and an extension locking hoop, and the extension locking hoop is used to provide locking force for the connection between two adjacent hollow extension sections or the pressure section.

[0010] As a further configuration of the above solution, the power signal line is provided with a plurality of extension lines with both ends capable of being sealed and connected.

[0011] As a further configuration of the above solution, the stabilizing frame is provided with a plurality of articulated legs, the articulated legs are swingably arranged relative to the sampling head, and the sampling head is provided with a telescopic sleeve and a secondary electric cylinder for driving the telescopic sleeve to move.

[0012] Beneficial effect: The underwater rock and soil sampling device of the utility model is equipped with an extension rod and an underwater photography device, so that the positioning of the hole opening for sampling can be controlled on the water surface. Furthermore, through the independent control design of the sampling motor and the electric hydraulic cylinder of this embodiment, as well as the discharge design at the rear end of the sampling tube, the rock sample at the specified depth can be directly obtained in one go, reducing the problems of low sampling efficiency caused by repeated extension and contraction and the pollution effect of the underwater environment on the sampling site, thereby meeting the needs of fixed-point investigation and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the sampling device of the present utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the sampling drill bit of the utility model.

[0015] Figure 3 This is a schematic diagram of the drill rod structure of the utility model.

[0016] Figure 4 This is a schematic diagram of the electric hydraulic cylinder of the present utility model.

[0017] Figure 5 This is a schematic diagram of the extension cord and the end of the extension rod of the utility model.

[0018] Figure numerals: 1. Sampling head; 11. Stable frame; 111. Articulated tripod; 12. Sampling drill bit; 121. Sampling tube; 122. Drill rod; 123. Spiral material guide part; 124. Rotary crushing part; 125. Crushing head fixing frame; 126. Crushing drill bit assembly; 129. Discharge port; 13. Sampling motor; 18. Telescopic sleeve; 2. Extension rod; 21. Pressure section; 22. Hollow extension section; 221. Rod body; 222. Connector; 223. Extension locking clamp; 23. Electric hydraulic cylinder; 231. Piston rod; 3. Power signal line; 31. Extension line. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] like Figure 1-5 A sampling device for underwater geotechnical engineering shown in the figure includes a sampling head 1 and an extension rod 2. The sampling head 1 includes a stable frame 11, a sampling drill bit 12 and a sampling motor 13. The main shaft of the sampling motor 13 is connected to the rotation of the sampling drill bit 12 relative to the stable frame 11. The extension rod 2 includes a hollow extension section 22 and a pressure section 21 connected to the sampling head 1. An electric hydraulic cylinder 23 is provided in the pressure section 21. The end of the sampling drill bit 12 abuts against the piston rod 231 of the electric hydraulic cylinder 23. The power signal line 3 of the sampling motor 13 and the electric hydraulic cylinder 23 extends from the inner hole of the extension rod 2 to the controller setting on the water surface.

[0021] As a further configuration of the above scheme, the sampling drill bit 12 includes a sampling tube 121 and a drill rod 122 located at the front end of the sampling tube. The sampling motor 13 is fixed in the sampling tube 121 to drive the drill rod 122 to perform rotary drilling. A discharge port 129 is provided at the rear end of the sampling tube 121. The drill rod 122 includes a spiral guide portion 123 and a rotary crushing portion 124. The rotary crushing portion 124 includes a plurality of crushing head fixing frames 125 and a crushing drill bit assembly 126 arranged in sequence along the spiral guide portion 123. The sampling tube 121 is fixed in contact with the piston rod 231. The electric hydraulic cylinder 23 is used to provide an axial thrust for the sampling drill bit 12 to penetrate into the rock formation.

[0022] As described above, when the sampling drill bit 12 of this embodiment is in use, the sampling motor 13 provided thereon drives the drill rod 122 to rotate at high speed, and the electric hydraulic cylinder 23 provides pressure driving force at the rear to push the rotating drill rod 122 forward to crush the rock formation and send the crushed rock particles into the sampling tube 121 along the spiral guide part 123 of the drill rod. When the crushed rock particles exceed the length of the sampling tube 121, the rock particles will be ejected from the discharge port 129 at the rear end of the sampling tube 121. This design allows the electric hydraulic cylinder 23 and the sampling motor 13 to be controlled separately. Firstly, it avoids the common single drive, which results in the forward power relying on the rotational thrust of the sampling motor 13 and the spiral extension force of the drill bit, and the drilling is prone to slipping. Secondly, under the drilling reaction force of the rock formation, the common drill bit is prone to slipping. Slipping or jamming problems, and the present solution sets the electric hydraulic cylinder 23 with a certain buffering capacity, the pressure is not easily affected by the ordinary motor driving force, and the effect of crushing drilling is better. Through the above setting, during drilling, for example, it is necessary to take samples at a depth of 1.5m below the surface. If the sampling tube 121 of the prior art is only 0.5m long, it needs to be repeatedly entered and exited three times, and after the sampling tube 121 is pulled out of the borehole, it is easy for mud and gravel on the bottom of the water to slide in, blocking and polluting the bottom environment of the hole, and the drill rod 122 of this embodiment can continue to go deeper. After reaching the specified position, the sampling motor 13 is stopped and the sample is taken out intact by retracting the piston rod 231. This structure allows the piston rod 231 to stay at any depth for sampling within the telescopic stroke range to meet the use requirements of surveying.

[0023] As a further configuration of the above solution, the hollow extension section 22 includes a rod body 221 , a connector 222 and an extension locking hoop 223 . The extension locking hoop 223 is used to provide locking force for the connection between two adjacent hollow extension sections 22 or the pressure section 21 .

[0024] As a further configuration of the above solution, the power signal line 3 is provided with a plurality of extension lines 31 with both ends capable of being sealed and connected. The ends of the extension lines 31 are provided with water-tight joints, and the ends are connected to increase the length of the line.

[0025] As a further arrangement of the above scheme, the stabilizing frame 11 is provided with a plurality of articulated legs 111, which are swingably arranged relative to the sampling head 1, and the sampling head 1 is provided with a telescopic sleeve 18 and a secondary electric cylinder for driving the telescopic sleeve 18 to move. When the sampling head 1 is lowered to the water surface, the secondary electric cylinder drives the telescopic sleeve 18 to axially move the articulated legs 111 to retract. After contacting the bottom of the water body, the telescopic sleeve 18 is axially moved to the other side by controlling the secondary electric cylinder, so that the articulated legs 111 are unfolded on the bottom of the water for support.

[0026] When drilling and sampling, the sampling device of the present invention is directly controlled by the controller located on the water surface through the power signal line 3. The underwater sampling motor 13 drives the drill rod 122 to rotate rapidly to crush the rock layer, and the electric hydraulic cylinder 23 arranged in the pressure section 21 works synchronously, and drives the sampling drill bit 12 to move axially through the piston rod 231, providing axial activity force for the sampling operation of the sampling device. It is worth noting that this embodiment shows the drill bit breaking the rock layer for sampling. According to the operation requirements, the drill rod 122 of the sampling drill bit 12 can be replaced with a drill sleeve to perform rock coring operations.

[0027] Furthermore, when assembling the sampling device of this embodiment from storage to use, it is necessary to first take out the sampling head 1 and connect it to the pressure section 21 of the first section. During this process, the pressure section 21 must be aligned with the sampling drill bit 21, and the power signal line 3 of the sampling motor 13 in the sampling drill bit 12 must be extended through the inner hole of the pressure section 21, and the pressure section 21 and the sampling head 1 can be fixed with bolts to stably install the two. Subsequently, according to needs, the hollow extension section 22 is taken out and the end of one of them is connected to the pressure section 21, and then the two ends are connected in sequence. During this process, it should be noted that the power signal line 3 must pass through each hollow extension section 22, and its end clamp is fixedly connected by extending the locking clamp 223, and finally connected to the controller, and the power signal line 3 is connected to it.

[0028] The sampling device of the present invention is different from the prior art in that the prior art devices generally use a single motor to drive the rotation and synchronous extension. During the rotation and extension process, the length of the sampling drill tube is fixed and the sampling depth is limited. The device of the present embodiment uses an electric hydraulic cylinder 23 to cooperate with the drill rod 122 driven by the sampling motor 13 to axially extend and drill. The sampling motor 13 keeps the drill rod 122 rotating to break the rock formation, and the electric hydraulic cylinder 23 can push the sampling tube 121 to drive the drill rod 122 to extend and retract synchronously. The drilling depth is determined by controlling the extension and retraction stroke of the piston rod 231 of the electric hydraulic cylinder 23.

[0029] It is worth noting that the design of this embodiment is based on the setting of the discharge port 129 of the sampling tube 121 near the rear end part of the piston rod 231. During the downward process of the drill rod 122, when it reaches the sampling soil layer in the future, the sampling tube 121 will discharge rock fragments from the discharge port 129, and based on the continuous feeding at the bottom and the discharge at the rear end before reaching the specified depth, the sample in the sampling tube 121 is continuously replaced until the specified depth is drilled. The rock sampling motor 13 stops working, and based on the no longer rotating spiral drill rod 122 being stationary, the front end will no longer feed, and the electric hydraulic cylinder 23 retracts the sampling tube 121 with the specified rock sample, thereby completing the operation of rock sampling only from a specific depth.

[0030] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A sampling device for underwater geotechnical engineering, characterized by: The invention comprises a sampling head (1) and an extension rod (2). The sampling head (1) comprises a stabilizing frame (11), a sampling drill bit (12) and a sampling motor (13). The main shaft of the sampling motor (13) is connected to the rotation of the sampling drill bit (12) relative to the stabilizing frame (11). The extension rod (2) comprises a hollow extension section (22) and a pressure section (21) connected to the sampling head (1). An electric hydraulic cylinder (23) is provided in the pressure section (21). The end of the sampling drill bit (12) abuts against the piston rod (231) of the electric hydraulic cylinder (23). A power signal line (3) between the sampling motor (13) and the electric hydraulic cylinder (23) extends from the inner hole of the extension rod (2) to a controller provided on the water surface.

2. A sampling device for underwater geotechnical engineering according to claim 1, characterized in that: The sampling drill bit (12) comprises a sampling tube (121) and a drill rod (122) located at the front end of the sampling tube. The sampling motor (13) is fixed in the sampling tube (121) to drive the drill rod (122) to perform rotary drilling. A discharge port (129) is provided at the rear end of the sampling tube (121).

3. The sampling device for underwater geotechnical engineering according to claim 2, characterized in that: The drill rod (122) comprises a spiral material guide portion (123) and a rotary crushing portion (124); the rotary crushing portion (124) comprises a plurality of crushing head fixing frames (125) and crushing drill bit assemblies (126) sequentially arranged along the spiral material guide portion (123).

4. The sampling device for underwater geotechnical engineering according to claim 2, characterized in that: The sampling tube (121) is fixedly abutted against the piston rod (231), and the electric hydraulic cylinder (23) is used to provide an axial thrust for the sampling drill bit (12) to penetrate into the rock formation.

5. The sampling device for underwater geotechnical engineering according to claim 1, characterized in that: The hollow extension section (22) comprises a rod body (221), a connector (222) and an extension locking hoop (223), wherein the extension locking hoop (223) is used to provide a locking force for the connection between two adjacent hollow extension sections (22) or the pressure section (21).

6. The sampling device for underwater geotechnical engineering according to claim 1, characterized in that: The power signal line (3) is provided with a plurality of extension lines (31) with both ends capable of being sealed and connected.

7. The sampling device for underwater geotechnical engineering according to claim 1, characterized in that: The stabilizing frame (11) is provided with a plurality of articulated legs (111), the articulated legs (111) being swingably arranged relative to the sampling head (1), and the sampling head (1) is provided with a telescopic sleeve (18) and a secondary electric cylinder for driving the telescopic sleeve (18) to move.

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