Grabbing and releasing assembly and grabbing and releasing lifting device for in-situ test experiment

Abstract

The utility model belongs to the technical field of geotechnical engineering, and particularly relates to a grabbing and disengaging assembly and a grabbing and disengaging lifting device for an in-situ test. The grabbing and disengaging assembly comprises a traction piece and a grabbing and disengaging block. The traction piece is of a rigid structure, and the lower end of the traction piece is connected with the grabbing and disengaging block. The grabbing, disengaging and lifting device comprises the grabbing and disengaging assembly. The device can solve the problems that an existing device is low in efficiency and large in potential safety hazard, and the problem that a pulling rope is clamped on an anti-disengaging clamping ring at the top of the guide rod or two strands of ropes are wound is solved. The grabbing-disengaging assembly and the grabbing-disengaging lifting device are simple in structure, convenient to assemble, high in reliability and capable of guaranteeing test continuity, improving test efficiency and eliminating potential safety hazards caused by high-altitude operation and physical striking.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering technology, specifically relating to a gripping and detaching component and a gripping and lifting device for in-situ testing. Background Technology

[0002] Standard penetration test (SPT) and dynamic cone penetration test (DCPT) are both dynamic penetration methods, which are two commonly used in-situ testing methods for determining various soil and rock layers. They have high reference value and can evaluate the physical state of sand, silt, cohesive soil, gravelly soil, and fully to strongly weathered rock, as well as the soil strength, deformation parameters, foundation bearing capacity, single pile bearing capacity, liquefaction of sand and silt, and the possibility of pile formation.

[0003] Chinese patent CN213710964U discloses a standard hammer-driving device for engineering drilling. This device is mounted on a drilling rig, which has a lifting mechanism connected to a mandrel via an automatic release device. The mandrel is fitted onto a guide rod, which is divided into a guide section and a release section along its axial direction. The lifting mechanism raises the mandrel upwards. When the mandrel reaches the release section, it disengages from the automatic release device and falls freely along the guide section, striking the penetration rod. The advantage of this patent is that the automatic release device enables automatic and continuous standard penetration testing, making operation simple, quick, and improving work efficiency. However, in actual operation, the wire rope connecting the release block is prone to getting stuck on the anti-detachment ring at the top of the guide rod or becoming entangled, preventing the release block from falling into the placement groove. In this case, one person needs to climb onto the drilling rig head to insert the release block into the placement groove, resulting in low efficiency and increasing the risks of working at height and physical impact, posing a significant safety hazard. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a gripping and detaching component for in-situ testing, thereby solving the issues of low efficiency and significant safety hazards in existing testing devices.

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

[0006] A gripping and releasing assembly for in-situ testing includes a traction component and a gripping block; the traction component is a rigid structure, with its lower end connected to the gripping block. The gripping block is conventionally equipped with an elastic telescopic component for gripping and releasing from a hammer.

[0007] Preferably, the traction component is a cylindrical structure, and the middle part of the gripping block is provided with a vertical through hole, which communicates with the inner cavity of the traction component, so that the guide rod can be inserted into the gripping block and the traction component at the same time, thereby allowing the gripping block and the traction component to move up and down along the guide rod.

[0008] Preferably, the traction component and the gripping block are connected by threads for easy disassembly.

[0009] Preferably, the upper end of the traction component is provided with a connector, and slots are provided on both sides of the connector, the slots being arranged in parallel and symmetrical order. This connector adopts the same design as the connector at the top of the drill pipe, allowing the traction component and the drill pipe to share the same lifting device, simplifying the assembly and disassembly process.

[0010] Another objective of this invention is to provide a gripping and lifting device for in-situ testing, the gripping and lifting device including the gripping component.

[0011] Preferably, it also includes a lifting device, which includes a retaining sleeve and a locking ring. The retaining sleeve has an opening chamber for engaging the connector. The locking ring is fitted onto the retaining sleeve and can rotate and slide freely up and down.

[0012] Preferably, it also includes a lifting ring, which has an inverted U-shaped structure and its lower end is connected to the top of the sleeve.

[0013] Preferably, the upper outer wall of the sleeve is provided with an upper limit flange, and the lower outer wall of the sleeve is provided with a lower limit flange, which are used to limit the stroke of the locking ring.

[0014] Preferably, the lower inner wall of the sleeve is provided with an inner flange for engaging with the top of the slot.

[0015] Preferably, the oral cavity has an inverted U-shaped structure.

[0016] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0017] This invention replaces the traction rope directly connected to the grab block with a traction component, avoiding the problems of the traction rope easily getting stuck on the anti-detachment ring at the top of the guide rod or the two ropes easily getting tangled. This invention has a simple structure, is easy to assemble, and has high reliability. It can ensure the continuity of testing, improve testing efficiency, and eliminate safety hazards caused by high-altitude operations and physical impacts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the gripping and detaching component of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the lifting device of the gripping and detaching component of this utility model;

[0020] Figure 3 This is a structural schematic diagram of the lifting ring of this utility model;

[0021] Figure 4 This is a schematic diagram of the present invention used for in-situ testing.

[0022] Figure 5 This is a schematic diagram of the lifting device of this utility model used to lift the drill pipe.

[0023] The numbers and names in the diagram are as follows:

[0024] 1-Traction component; 2-Grab and release block; 3-Connector; 4-Slot; 5-Cladle; 6-Locking ring; 7-Opening chamber; 8-Lifting ring; 9-Upper limit flange; 10-Lower limit flange; 11-Inner flange; 12-Guide rod; 13-Hammer pad; 14-Through hammer; 15-Groove; 16-Drill rod; 17-Standard penetration head or moving probe; 18-Traction rope; 19-Winder; 20-Drilling rig. Detailed Implementation

[0025] To better illustrate this utility model, specific implementation examples are provided. These implementation examples fall within the protection scope of this utility model but do not limit its protection scope.

[0026] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0027] A gripping and releasing component for in-situ testing, such as Figure 1 As shown, the device includes a traction component 1 and a gripping block 2. The traction component 1 is a rigid structure, with its lower end connected to the gripping block 2. The traction component 1 is a cylindrical structure, and the gripping block 2 has a vertical through hole in its middle, which communicates with the inner cavity of the traction component 1, allowing a guide rod 12 to pass through both the gripping block 2 and the traction component 1 simultaneously, thus enabling the gripping block 2 and the traction component 1 to move up and down along the guide rod 12. The traction component 1 and the gripping block 2 are connected by threads, making them detachable and easy to replace. The lower outer wall of the traction component 1 has external threads, and the inner wall of the vertical through hole of the gripping block 2 has internal threads for engagement. The upper end of the traction component 1 has a connector 3, and slots 4 are provided on both sides of the connector 3, arranged in a parallel and symmetrical manner.

[0028] In this embodiment, the specific method of using the gripping and detaching component for in-situ testing is as follows:

[0029] like Figure 4 As shown, the drilling rig 20 first travels to the drilling position, drills to the depth required for in-situ testing, removes the drill rod 16 and drilling tools from the hole, installs the standard penetration test head or moving probe at the lower end of the drill rod 16, lifts the drill rod 16 and puts it into the hole, so that the standard penetration test head or moving probe 17 reaches the bottom of the hole, and keeps the drill rod 16 above the ground as required. Install the guide rod 12 with its own hammer pad 13 on top of the drill rod 16, and then fit the mandrel 14 into the guide rod 12; connect the traction rope 18 to the connector 3 of the traction component 1, and then fit the entire gripping assembly onto the guide rod 12; the winch 19 lowers the traction rope 18 to place the gripping assembly into the groove 15 on the mandrel 14, the elastic telescopic component on the gripping block 2 is locked with the mandrel 14, the winch 19 winds up the traction rope 18, and pulls the gripping assembly upward, thereby driving the mandrel 14 to rise upward. When it is in the guide section of the guide rod 12, the gripping assembly and the mandrel 14 are in a relatively fixed state. When the mandrel 14 is raised to the reduced diameter section of the guide rod 12, the elastic telescopic component on the gripping block 2 relaxes, the mandrel 14 separates from the gripping assembly and falls freely along the guide rod 12 to strike the hammer pad 13, thereby driving the standard penetration head or moving probe at the bottom of the hole into the soil layer. This process is repeated until the in-situ test is completed. Example

[0030] A gripping and lifting device for in-situ testing, such as Figures 2-3 As shown, the lifting device of the gripping and releasing assembly in Embodiment 1 includes a retaining sleeve 5, a locking ring 6, and a lifting ring 8. The retaining sleeve 5 has an opening chamber 7 for engaging the connector 3; the opening chamber 7 has an inverted U-shape, and its size is adapted to the size of the connector 3. The locking ring 6 is fitted onto the retaining sleeve 5 and can rotate and slide freely up and down. The function of the locking ring 6 is to lock the retaining sleeve 5 and the traction component 1, preventing the traction component 1 from falling off. The lifting ring 8 has an inverted U-shape, and its lower end is connected to the top of the retaining sleeve 5 by bolts. The upper outer wall of the sleeve 5 is provided with an upper limit flange 9, the lower outer wall of the sleeve 5 is provided with a lower limit flange 10, and the inner wall is provided with an inner flange 11. The upper limit flange 9 and the lower limit flange 10 are used to limit the upward and downward strokes of the locking ring 6, respectively, while the inner flange 11 is used to engage with the upper end of the connector 3 so that the traction member 1 can be lifted.

[0031] The specific working process of this embodiment is as follows:

[0032] In this embodiment, the specific method of using the gripping and detaching component for in-situ testing is as follows:

[0033] like Figure 4As shown, the drilling rig 20 first travels to the drilling position and drills to the depth required for in-situ testing. The drill rod 16 and drilling tools are then removed from the borehole. A standard penetration test (SPT) or moving probe is installed at the lower end of the drill rod 16. The drill rod 16 is then lifted and lowered into the borehole, ensuring the SPT or moving probe reaches the bottom of the hole, while maintaining the drill rod 16 above the ground. A guide rod 12 with a built-in hammer pad 13 is installed on the top of the drill rod 16, and then the through hammer 14 is fitted onto the guide rod 12. The lifting device is connected to the connector 3 of the traction component 1. The specific connection method is as follows: the locking ring 6 is pushed upwards above the opening chamber 7, and held in place by hand to prevent it from falling. Then, the ferrule 5 is pushed into the slot 4, and the connector 3 is inserted into the opening chamber 7. The hand is released, allowing the locking ring 6 to fall to the bottom, thus locking the connector 3 and the ferrule 5. After the lifting device is connected, the entire grabbing assembly is then mounted on the guide rod 12. The winch 19 lowers the traction rope 18 to place the grabbing assembly into the groove 15 on the mandrel 14. The elastic telescopic component on the grabbing block 2 is locked with the mandrel 14. The winch 19 winds up the traction rope 18 and pulls the grabbing assembly upward, thereby lifting the mandrel 14 upward. When it is in the guide section of the guide rod 12, the grabbing assembly and the mandrel 14 are in a relatively fixed state. When the mandrel 14 is lifted to the reduced diameter section of the guide rod 12, the elastic telescopic component on the grabbing block 2 relaxes, the mandrel 14 separates from the grabbing assembly and falls freely along the guide rod 12 to strike the hammer pad 13, thereby driving the standard penetration head or moving probe at the bottom of the hole into the soil layer. This process is repeated until the in-situ test is completed.

[0034] In the above process, since the design of the drill pipe top joint is the same as that of the connector of this utility model, the drill pipe 16 can be directly hoisted into the borehole using the lifting device of this utility model, such as Figure 5 As shown, after the drill rod 16 is placed, the hoisting of the grabbing and releasing component applied to this utility model can be quickly switched, avoiding the need to disassemble the lifting device and then connect the traction rope 18, simplifying the disassembly and assembly steps and improving work efficiency.

[0035] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention.

Claims

1. A gripping and releasing assembly for in-situ testing, characterized in that: It includes a traction component (1) and a gripping block (2). The traction component (1) is a rigid structure, and its lower end is connected to the gripping block (2). The traction component (1) is a cylindrical structure, and the gripping block (2) has a vertical through hole in the middle, which communicates with the inner cavity of the traction component (1).

2. The gripping and releasing assembly for in-situ testing as described in claim 1, characterized in that: The traction component (1) and the gripping block (2) are connected by threads.

3. The gripping and releasing assembly for in-situ testing as described in any one of claims 1 to 2, characterized in that: The upper end of the traction member (1) is provided with a connector (3), and slots (4) are provided on both sides of the connector (3).

4. A gripping and lifting device for in-situ testing, characterized in that: It includes the gripping and detaching component as described in any one of claims 1 to 3.

5. The grasping and lifting device for in-situ testing as described in claim 4, characterized in that: It also includes a lifting device, which includes a sleeve (5) and a locking ring (6). The sleeve (5) has an opening chamber (7) for engaging the connector (3). The locking ring (6) is fitted onto the sleeve (5) and can rotate and slide freely up and down.

6. The grasping and lifting device for in-situ testing as described in claim 5, characterized in that: It also includes a lifting ring (8), which has an inverted U-shaped structure and its lower end is connected to the top of the sleeve (5).

7. The grasping and lifting device for in-situ testing as described in claim 5, characterized in that: The upper outer wall of the sleeve (5) is provided with an upper limit flange (9), and the lower outer wall of the sleeve (5) is provided with a lower limit flange (10).

8. The grasping and lifting device for in-situ testing as described in claim 5, characterized in that: The oral cavity (7) is an inverted U-shaped structure.

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